JP2019035278A - Construction machine - Google Patents

Abstract

To provide a construction machine which can perform a position adjustment work of a lock device provided in an opening and closing cover quickly and accurately.SOLUTION: A lock device 8 comprises: a catch 81 attached to a bonnet 5; and a striker 83 attached to a counterweight 6 and engaging with the catch 81. In a state where the bonnet 5 is closed, a recess 63 (an opening for the lock device) is formed in a part of a boundary between the counterweight 6 and the bonnet 5. A detachable protective cover 7 covering the recess 63 is provided in the counterweight 6. In a state where the protective cover 7 is detached and the bonnet 5 is closed; an engagement position of the catch 81 with the striker 83 is at a position that is visible from an outside through the recess 63, and bolts 844 for attaching the striker 83 and the a lock device base plate 84 to the counterweight 6 is provided at positions where the bolt can be fastened from an outside through the recess 63.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a construction machine including a main body member and an opening / closing cover that opens and closes with respect to the main body member.

  A configuration is known in which a lock device is attached to an open / close door provided in a machine room of a construction machine, and the open / close door is locked in a closed state. The locking device has a hook member provided on the opening / closing door side and a latch fixed to an attachment plate fixed to the support. A long hole for inserting a bolt is formed in the mounting plate to which the latch is fixed. The bolt is screwed into the nut in a loose state, and the latch is inserted and removed to adjust the tip position of the latch engagement / disengagement portion so as to have an appropriate engagement relationship with the engagement portion of the hook member (for example, , See Patent Document 1).

JP 2002-321651 A

  However, in the above configuration, when adjusting the locking device, the opening / closing door is opened and closed, the engagement between the latch and the hook member is confirmed, and the operation of inserting and removing the latch is repeated accordingly. It takes time and effort.

  Therefore, an object of the present invention is to provide a construction machine that can quickly and accurately perform a position adjustment operation of a lock device provided in an opening / closing cover.

  In order to achieve the above object, the present invention provides a locking device that locks the open / close cover with respect to the main body member in a construction machine including a main body member and an open / close cover that opens and closes with respect to the main body member. The lock device includes a cover side lock member attached to the open / close cover, and a main body side lock member attached to the main body member and engaged with the cover side lock member, and the open / close cover is closed. A lock device opening is formed at a part of a boundary between the main body member and the opening / closing cover, and a detachable protective cover for covering the lock device opening is provided on the main body member. The engagement portion between the cover side lock member and the main body side lock member is not mounted and the opening / closing cover is closed, Thus, there is provided a construction machine in which a fixing tool for attaching the main body side locking member to the main body member is provided at a position that can be fastened from the outside through the opening for the locking device. .

  Here, it is preferable that a detector is disposed in the opening for the lock device, and a detector opening is formed in the protective cover at a position corresponding to the detector.

  Moreover, it is preferable that the detector attachment member which attaches the said detector is being fixed to the locking device base board which comprises the said main body side locking member.

  Further, the main body member is a counterweight provided at the rear part of the machine body to balance the weight with the work attachment, and the opening / closing cover is provided behind the engine compartment where the engine is disposed and is opened and closed up and down. The locking device is provided in an adjacent portion in which the engine bonnet and the counterweight are vertically adjacent to each other, and the opening for the locking device is formed at the rear end portion of the upper surface of the counterweight in the adjacent portion. Preferably, the detector is provided on the lower side of the main body side locking member.

  Alternatively, the main body member is a counterweight provided at the rear part of the machine body to balance the weight with the work attachment, and the open / close cover is provided behind the engine compartment in which the engine is disposed and opens and closes up and down. In the locking device, the engine bonnet and the counterweight are provided in adjacent portions that are vertically adjacent to each other, and the upper surface of the counterweight in the adjacent portion is configured as a flat surface, and the locking device The opening is configured by a notch formed at the lower end of the engine bonnet, and the main body side locking member and the detector are provided on the flat surface so as to be adjacent to each other laterally. Is preferred.

  According to the construction machine of claim 1, the engaging portion of the locking device is in a position where it can be visually recognized from the outside through the locking device opening, and the fixing tool for attaching the main body side locking member to the main body member is the locking device opening. It is in a position that can be fastened from the outside through. For this reason, it is possible to make an adjustment while directly looking at the engagement state (the engagement state) of the lock device with the open / close cover closed. Therefore, the position adjustment operation of the lock device can be performed quickly and accurately. Moreover, since the removable protective cover which covers the opening for lock devices is provided, when adjustment of a lock device is completed, a protective cover can be attached and the inside of the opening can be protected.

  According to the construction machine of the second aspect, since the detector is disposed in the opening for the locking device and the opening for the detector is formed in the protective cover, compared with the case where the locking device and the detector are provided in different places. Placement space is reduced. The adjustment of the locking device and the adjustment of the detector can be performed continuously at the same location, and the assembly workability is good.

  According to the construction machine of the third aspect, since the mounting partner of the detector mounting member is shared with the member of the lock device, the number of parts and the cost can be reduced. Further, the arrangement space can be minimized as compared with the configuration in which the detector mounting member and the locking device are provided separately.

  According to the construction machine of the fourth aspect, since the lock member on the main body side of the lock device and the detector are protected in the recess formed in the counterweight, the possibility of damage is low even if an object collides. In addition, since the detector is located at a relatively low height, it is easy to enter the detection range directly under the aircraft.

  According to the construction machine of the fifth aspect, the lock device opening is formed by forming a notch in the lower end of the engine bonnet, and the main body side lock member and the detector are arranged on the flat surface of the counterweight. So as to be adjacent to the direction. For this reason, when an increasing weight (additional weight) is attached to the rear surface of the counterweight, the amount of processing the increasing weight can be reduced as compared with a configuration in which a recess is formed in the counterweight and a detector is arranged.

The side view which shows the construction machine by embodiment of this invention. The top view which shows the construction machine by embodiment. The rear view which shows the position and imaging range of the rear camera of the construction machine by 1st embodiment. The perspective view which shows the schematic shape of the counterweight by 1st embodiment. The rear view which shows the engine bonnet locking device by 1st embodiment, and a rear camera attachment structure (state without a protective cover). 1 is a longitudinal sectional view showing an engine bonnet locking device and a rear camera mounting structure according to a first embodiment (in a state where a protective cover is not attached). The top view which shows the engine bonnet locking device and back camera attachment structure by 1st embodiment (state without a protective cover). The rear view which shows the engine bonnet locking device and rear camera attachment structure by 1st embodiment (state which attached the protective cover). BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing an engine bonnet lock device and a rear camera mounting structure according to a first embodiment (with a protective cover attached). The top view which shows the engine bonnet locking device and rear camera attachment structure by 1st embodiment (state which attached the protective cover). The rear view which shows the position and imaging range of the rear camera of the construction machine by 2nd embodiment. The perspective view which shows the schematic shape of the counterweight by 2nd embodiment. The rear view which shows the engine bonnet locking device and rear camera attachment structure by 2nd embodiment (state in which the protective cover is not mounted | worn). The longitudinal cross-sectional view which shows the engine bonnet locking device by 2nd embodiment, and a rear camera attachment structure (state without a protective cover). The top view which shows the engine bonnet locking device by 2nd embodiment, and a rear camera attachment structure (state without a protective cover). The rear view which shows the engine bonnet locking device and rear camera attachment structure by 2nd embodiment (state which attached the protective cover). The longitudinal cross-sectional view which shows the engine bonnet locking device and rear camera attachment structure by 2nd embodiment (state which attached the protective cover). The top view which shows the engine bonnet locking device and rear camera attachment structure by 2nd embodiment (state which attached the protective cover).

  A construction machine according to a first embodiment of the present invention will be described with reference to FIGS. Hereinafter, a hydraulic excavator 1 shown in FIG. 1 is illustrated as an example of a construction machine according to the present invention. For convenience of explanation, front and rear, left and right, and up and down directions of the machine are defined as shown in FIGS.

  As shown in FIG. 1, the hydraulic excavator 1 includes a crawler-type lower traveling body 2 and an upper swing body 3 (an example of a machine body). The upper swing body 3 is mounted on the lower travel body 2 and can swing around the vertical axis with respect to the lower travel body 2. The upper swing body 3 is provided with a work attachment 4 including a boom, an arm, and a bucket.

  As shown in FIGS. 1 and 2, an engine bonnet 5 (hereinafter simply referred to as “bonnet 5”, an example of an opening / closing cover) for opening and closing the rear of the engine compartment is provided at the rear of the upper swing body 3. It has been. In the bonnet 5 of the present embodiment, an upper surface portion 51 that extends in the horizontal direction and a rear surface portion 52 that extends in the vertical direction are integrally formed, and can be rotated upward about a rotation shaft portion 53. In the open state in which the bonnet 5 is rotated upward (indicated by a one-dot chain line in FIG. 1), the engine room can be accessed for maintenance and the like. The engine (not shown) is disposed in the vicinity of the upper surface portion 51 and the rotating shaft portion 53 when viewed in FIG.

  As shown in FIGS. 6 and 9, the rear surface portion 52 of the bonnet 5 is bent slightly forward near the lower end, and a seal member 54 is attached to the lower end. The lower end of the seal member 54 is in contact with the upper surface of a protective cover 7 (FIG. 9), which will be described later, to form a lower end alignment seal surface 54A.

  A counterweight 6 (an example of a main body member) for balancing the weight with the work attachment 4 is provided at the rear part of the upper swing body 3. As shown in FIG. 4, the counterweight 6 of the present embodiment is formed with a notch 61 in which the bonnet 5 is disposed and left and right openings 62 in which side covers (not shown) are disposed. . Needless to say, the shape of the counterweight is not limited to this.

  Further, in the present embodiment, the upper surface of the counterweight 6 in a portion where the lower end (that is, the end portion on the opening side) of the bonnet 5 and the counterweight 6 are vertically adjacent to each other (hereinafter also referred to as “adjacent portion”). A concave portion 63 is formed at the rear end portion, and a rear camera 9 (hereinafter simply referred to as “camera 9”, which is an example of a detector) is disposed in the concave portion 63. This adjacent portion is located on the rear side of the engine. Moreover, the recessed part 63 is an example of the opening for lock devices of this invention.

  With reference to FIGS. 5 to 10, the mounting structure of the lock device 8 and the camera 9 of the bonnet 5 will be described in detail. 5 and 8, illustration of the bonnet 5 is omitted, but for the sake of convenience, only a catch 81 and a connection member 82 (described later) attached to the bonnet 5 are shown. 5 to 7 show a state where the detachable protective cover 7 is not attached, and FIGS. 8 to 10 show a state where the protective cover 7 is attached.

  The counterweight 6 has an upper surface 64, a protective cover mounting surface 65 </ b> A, a base plate mounting surface 65 </ b> B, and a bottom surface 66.

  The protective cover mounting surface 65A is at a height lowered from the upper surface 64 by the thickness of the upper surface portion 71 of the protective cover 7 described later. Further, a bolt hole 651 for attaching the protective cover 7 is formed in the protective cover attaching surface 65A.

  The base plate attachment surface 65B is a seat surface for attaching a lock device base plate 84 described later, and is at a height further lowered from the protective cover attachment surface 65A. As shown in FIGS. 5 and 7, two base plate attachment surfaces 65B are formed on the left and right.

  The bottom surface 66 is a surface that forms the bottom of the recess 63. As shown in FIG. 6, the bottom surface 66 is an inclined surface in accordance with the central axis direction of the camera 9 being inclined downward toward the rear.

  In addition, a lock device 8 that locks the bonnet 5 in the closed state with respect to the counterweight 6 is provided in the adjacent portion. The lock device 8 includes a catch 81 (an example of a cover side lock member) attached to the bonnet 5 and a striker 83 (a part of the main body side lock member) attached to the counterweight 6 and engaged with the catch 81. The catch 81 is attached to the rear surface portion 52 of the bonnet 5 via the connection member 82.

  As shown in FIG. 7, the lock device base plate 84 (a part of the main body side lock member) is a substantially trapezoidal flat plate in plan view. A striker 83 is fixed to the upper surface of the lock device base plate 84 by welding or the like. The lock device base plate 84 is fixed to the base plate mounting surface 65B of the counterweight 6 with two bolts 844 (an example of a fixture). In addition, the hole of the locking device base plate 84 into which the bolt 844 is inserted is configured as a long hole that is long in the left-right direction so that the position can be adjusted while looking at the degree of engagement between the catch 81 and the striker 83. Further, the lock device base plate 84 provided with the striker 83 and the camera 9 described later are assembled to the counterweight 6 as one integrated component (sub-assembly).

  By providing the lock device base plate 84 in the recess 63, the recess 63 is divided into a camera arrangement space 631 below the lock device base plate 84 and a fixture fastening space 632 above the lock device base plate 84. (FIG. 5). A camera 9 described later is arranged in the camera arrangement space 631. A tool is inserted into the fixture fastening space 632 when fastening the bolt 844 of the lock device base plate 84.

  With this configuration, the bolt 844 for attaching the lock device base plate 84 to the counterweight 6 is positioned below the boundary between the bonnet 5 and the upper rear end portion of the counterweight 6 (lower end alignment seal surface 54A). . Thereby, a fixture fastening space 632 in which the bolt 844 can be fastened with the bonnet 5 closed is formed.

  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. The lens 92 is exposed from the rear part of the housing 91. A camera component is housed in the housing 91, and a harness (not shown) is drawn from the front of the housing 91, passed through the lower part of the engine compartment, and connected to a control device (not shown). The 3, 6, 7, 9, and 10, the imaging range R of the camera 9 is illustrated.

  The camera mounting member 94 is fixed to the lower surface of the lock device base plate 84. The camera attachment member 94 includes a base plate attachment portion 941 and a camera attachment portion 942. A pair of left and right base plate mounting portions 941 are provided, and are fixed to the lower surface of the lock device base plate 84 by screws 943 and a back nut 944.

  The camera mounting portion 942 is a portion that is bent about 90 degrees downward from the left and right inner ends of the left and right base plate mounting portions 941 and further extends rearward (FIG. 6). A housing 91 of the camera 9 is fixed to the camera mounting portion 942 with four screws. With this configuration, the camera 9 is disposed below the lock device 8. Further, the camera 9 is located in front of the rear surface 67 of the counterweight 6 (that is, inside the recess 63).

  The screw 943 provided on the upper surface of the lock device base plate 84 is a camera position adjusting screw for adjusting the position of the camera 9. The holes of the base plate mounting portion 941 into which the left and right screws 943 are inserted are formed as long holes that are long in the front-rear direction, for example. Thereby, the front-rear position can be determined while finely adjusting the camera 9 in the front-rear direction. In addition, since the elongated holes are formed in the left and right portions, the imaging direction of the camera 9 can be finely adjusted by moving the right side of the camera 9 forward and moving the left side backward, for example.

  Next, the configuration of the protective cover 7 will be described. As shown in FIGS. 8 to 10, the protective cover 7 has an upper surface portion 71, a rear surface upper portion 72, and a rear surface lower portion 73, which are integrally formed.

  As shown in FIG. 10, the upper surface portion 71 is fixed to the protective cover mounting surface 65 </ b> A of the counterweight 6 with two bolts 74 on the left and right. A cross-shaped opening 76 is formed in the upper surface portion 71. A striker 83 is disposed in a portion of the cross-shaped opening 76 that is long in the front-rear direction. In addition, the catch 81 is disposed in a portion of the cross-shaped opening 76 that is long in the left-right direction with the hood 5 closed.

  As shown in FIG. 9, the rear upper portion 72 is a portion that is bent downward by about 90 degrees from the upper surface portion 71 and faces rearward. The rear surface lower portion 73 is a portion extending downward from the rear surface upper portion 72, and as shown in FIG. A notch 75 (an example of a detector opening) is formed at a lower end of the lower rear surface 73 and corresponding to the lens 92 of the camera 9.

  The lower rear surface 73 is not parallel to the upper rear surface 72 but is bent slightly forward. This is to prevent the imaging range of the camera 9 from being blocked by bringing the notch 75 close to the lens 92 of the camera 9.

  Further, the upper surface of the upper surface portion 71 of the protective cover 7 coincides with the upper surface 64 of the counterweight and the lower end alignment seal surface 54 </ b> A of the bonnet 5. That is, the height positions of the upper surface of the protective cover 7, the upper surface 64 of the counterweight, and the lower end alignment seal surface 54A of the bonnet 5 are the same.

  When adjusting the lock device 8 and the camera 9 in such a configuration, first, the position of the lock device base plate 84 is finely adjusted in a state where the protective cover 7 is not attached and the bonnet 5 is closed. The degree of biting of the device 8 (the catch 81 and the striker 83) is adjusted. At this time, the engaging part (biting part) between the catch 81 and the striker 83 is in a position that can be visually recognized from the outside through the opening for the locking device (recess 63), and the bolt 844 is the opening for the locking device (recess 63). It is provided in the position which can be fastened from the outside through. For this reason, adjustment and bolting can be performed while visually confirming the degree of engagement of the lock device 8 with the bonnet 5 closed.

  Then, the bolt 844 is finally tightened to fix the lock device base plate 84 to the counterweight 6, and then the image position is adjusted by finely adjusting the position and direction of the camera 9, and then the camera position adjusting screw 943 is installed. Tighten. Thereby, the camera 9 is fixed to the lock device base plate 84.

  Thereafter, with the bonnet 5 opened, the protective cover 7 is attached to the protective cover mounting surface 65 </ b> A of the counterweight 6 with the bolt 74. As a result, the lock device 8 and the camera 9 are protected, and the bolt 844, the screw 943 and the like cannot be accessed from the outside.

  According to the construction machine of the embodiment described above, the engaging part of the lock device 8 is in a position where it can be visually recognized from the outside through the lock device opening (recess 63). Further, the bolt 844 for attaching the lock device base plate 84 to the counterweight 6 is in a position where it can be fastened from the outside through the lock device opening (recess 63). More specifically, the bolt 844 is positioned below the boundary between the bonnet 5 and the rear end of the upper surface of the counterweight 6 (lower end alignment seal surface 54A), and a space for tightening the bolt 844 (fixing device tightening space) 632) is formed. For this reason, it is possible to make an adjustment while directly looking at the engagement state (the engagement state) of the lock device 8 with the bonnet 5 closed. That is, it is not necessary to repeatedly open and close the bonnet 5 in order to see how the locking device 8 is engaged. For this reason, the position adjusting operation of the locking device 8 can be performed quickly and accurately.

  In addition, since the removable protective cover 7 covering the concave portion 63 is provided, the protective cover 7 can be attached to protect the concave portion 63 after the adjustment of the lock device 8 is completed.

  Further, since the camera 9 is disposed in the recess 63 and the cutout 75 is formed in the protective cover 7, the arrangement space is reduced as compared with the case where the lock device 8 and the camera 9 are provided in different locations. The adjustment of the lock device 8 and the adjustment of the camera 9 can be performed continuously at the same location, and the assembly workability is good.

  Furthermore, in the present embodiment, the mounting partner of the camera mounting member 94 can be shared with the lock device base plate 84 (that is, it can be a single component), so the number of components and the cost can be reduced. . Further, the arrangement space can be minimized as compared with the configuration in which the camera mounting member 94 and the lock device 8 are provided separately.

  Further, since the installation portion of the camera 9 is in the recess 63 formed in the robust counterweight 6, the possibility of camera damage is low even if an object collides. Further, since the camera 9 is attached to the counterweight 6, even if the bonnet 5 is deformed, the image is not distorted. Furthermore, it is not easily affected by work vibration.

  Further, the camera 9 is positioned at a relatively low height below the locking device 8 and at the rear end of the upper surface of the counterweight 6 (that is, near the boundary between the bonnet 5 and the counterweight 6 adjacent to each other in the vertical direction). The camera image is easy to see right under the rear edge of the aircraft. For example, as shown in FIG. 1, when a camera is installed at a position P1 above the hood as in the prior art, a range of a distance D1 from the rear end of the crawler is a blind spot. On the other hand, in this embodiment, since the camera is installed at the position P2 lower than the position P1, the distance D2 that becomes a blind spot is short. Furthermore, since the height is relatively low, the adjustment work of the camera 9 is easy.

  Moreover, it can comprise by the shortest path | route by letting the harness of the camera 9 pass to an engine compartment lower part. When a camera is installed on the hood as in the prior art, movable stress is applied to the harness as the hood is opened and closed. However, in this embodiment, since the camera 9 is installed on the counterweight 6, such movable stress is not applied. Although the upper part of the engine compartment becomes hot due to exhaust or the like, in this embodiment, the camera 9 is located in the lower part of the engine compartment, so that it is not easily damaged by heat.

  Further, since the camera 9 is disposed in the recess 63 formed at the rear end portion of the upper surface of the counterweight 6, the possibility of camera damage is further reduced even if an object collides.

  According to the construction machine of the present embodiment, since the attachment portion (specifically, the bolt 74) of the protective cover 7 is in the bonnet 5, the camera is prevented from being stolen.

  Further, since the upper surface of the protective cover 7 coincides with the upper surface 64 of the counterweight 6, the protrusion from the counterweight 6 can be minimized. Further, since the upper surface of the protective cover 7 is made to coincide with the lower end sealing surface 54A of the bonnet 5, the lower end sealing surface of the engine bonnet becomes a flat surface, and the sealing performance does not deteriorate.

  A construction machine according to a second embodiment of the present invention will be described with reference to FIGS. Note that the description of the same configuration as in the first embodiment is omitted.

  With reference to FIGS. 11 to 18, the mounting structure of the lock device 8 and the camera 9 of the bonnet 5 will be described in detail. 13 to 15 show a state where the detachable protective cover 107 is not attached, and FIGS. 16 to 18 show a state where the protective cover 107 is attached.

  At the lower end of the rear surface portion 52 of the bonnet 5, a notch 55 (FIGS. 11 and 13) for arranging the camera 9 and adjusting the lock device 8 is formed. In the present embodiment, since the locking device 8 and the camera 9 are arranged in a state where they are adjacent to each other in the left-right direction (lateral direction), the cutout 55 also has a shape that is long in the left-right direction. The notch 55 is an example of an opening for a locking device according to the present invention.

  A seal member 54 is attached to the lower end of the rear surface portion 52 of the bonnet 5. The seal member 54 is formed of a flexible material, and has a shape along the notch 55 in the notch 55 portion.

  The lower end of the seal member 54 is in contact with a protective cover 107 (FIGS. 16 and 17), which will be described later, and the upper surface 64 of the counterweight 6, thereby forming lower end alignment seal surfaces 54A, 54B, and 54C. The lower end alignment seal surface 54 </ b> A is a portion in contact with the upper surface portion 171 of the protective cover 107. The lower end alignment seal surface 54 </ b> B is a portion in contact with the side surface portion 174 of the protective cover 107. The lower end alignment seal surface 54 </ b> C is a portion in contact with the upper surface 64 of the counterweight 6.

  The upper surface 64 of the counterweight 6 is a flat surface. A bolt hole (not shown) for inserting a bolt 844 for attaching a lock device base plate 84 described later and a bolt hole 651 (FIG. 15) for attaching the protective cover 107 are formed on the upper surface 64. Yes.

  Further, a locking device 8 is provided at the upper surface rear end 163 (FIG. 12) of the counterweight 6 at a portion where the rear surface portion 52 of the bonnet 5 and the counterweight 6 are vertically adjacent to each other. The locking device 8 locks the bonnet 5 in the closed state with respect to the counterweight 6. The lock device 8 includes a catch 81 (an example of a cover side lock member) attached to the bonnet 5 and a striker 83 (a part of the main body side lock member) attached to the counterweight 6 and engaged with the catch 81. The catch 81 is attached to the rear surface portion 52 of the bonnet 5 via the connection member 82.

  As shown in FIG. 15, the lock device base plate 184 (a part of the main body side lock member) of the present embodiment is obtained by removing a portion (left rear corner) where the camera 9 is located from a substantially rectangular shape in plan view. A flat plate having a shape. A striker 83 is fixed to the upper surface of the lock device base plate 184 by welding or the like. The lock device base plate 184 is fixed to the upper surface 64 of the counterweight 6 with two bolts 844.

  As shown in FIG. 13, the bolt 844 is positioned below the lower end alignment seal surface 54A. Thereby, a fixture fastening space 632 in which the bolt 844 can be fastened with the bonnet 5 closed is formed.

  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. The lens 92 is exposed from the rear part of the housing 91. A camera component is housed in the housing 91, and a harness (not shown) is drawn from the front of the housing 91, passed through the lower part of the engine compartment, and connected to a control device (not shown). The In addition, in FIG.11, FIG.14, FIG.15, FIG.17 and FIG. 18, the imaging range R of the camera 9 is shown.

  The camera mounting member 94 is fixed to the upper surface of the lock device base plate 184. The camera attachment member 94 includes a base plate attachment portion 941 and a camera attachment portion 942. A pair of left and right base plate mounting portions 941 are provided, and are fixed to the upper surface of the lock device base plate 184 by screws 943.

  The camera mounting portion 942 is a portion that is bent upward by about 90 degrees from the left and right inner ends of the left and right base plate mounting portions 941 and further extends rearward (FIG. 14). A housing 91 of the camera 9 is fixed to the camera mounting portion 942 with four screws. With this configuration, the camera 9 is arranged in a state adjacent to the side of the lock device 8. Further, the camera 9 is located in front of the rear surface 67 of the counterweight 6.

  Next, the configuration of the protective cover 107 will be described. As shown in FIGS. 16 to 18, the protective cover 107 has an upper surface portion 171, a rear surface portion 172, a front surface portion 173, left and right side surface portions 174, and left and right attachment portions 175, which are integrally formed, As a whole, it has a box shape with an open bottom surface.

  As shown in FIG. 18, an opening 711 that is long in the left-right direction is formed in the upper surface portion 171. A catch 81 is disposed in the opening 711 with the bonnet 5 closed. As shown in FIG. 17, the upper surface portion 171 is inclined backward and downward in accordance with the striker 83 and the camera 9 being inclined downward and backward.

  As shown in FIG. 16, a notch 721 (an example of a detector opening) is formed at a lower end of the rear surface portion 172 and corresponding to the lens 92 of the camera 9. As shown in FIG. 17, the rear surface portion 172 is inclined so as to approach the lens 92 of the camera 9 with respect to the vertical direction. Thereby, since the notch 721 approaches the lens 92, the imaging range of the camera 9 can be prevented from being blocked.

  The left and right attachment portions 175 are provided at the lower end of the side surface portion 174. Each mounting portion 175 is formed with a bolt hole (not shown), and is fixed to the upper surface 64 of the counterweight 6 with a bolt 176.

  As shown in FIGS. 16 and 17, gaps 722 and 731 are provided between the upper surface 64 of the counterweight 6 and the protective cover 107 for convenience of manufacturing. It may be good or may be sealed.

  Also in the second embodiment, the lock device 8 and the camera 9 can be adjusted in the same procedure as in the first embodiment.

  By the way, when an increase weight (additional weight) is attached to the rear surface of the counterweight 6, the increase weight has to be processed in order to secure the field of view of the camera (that is, a part of the increase weight must be removed). Sometimes. In the second embodiment described above, the concave portion is not formed on the upper surface 64 of the counterweight 6, and the lock device 8 (the lock device base plate 184 and the striker 83) and the camera 9 are provided on the flat surface. Compared to the example in which the recess is formed and the lock device and the camera are installed in the recess, the amount of processing the weight increase is small.

  The construction machine by this invention is not limited to embodiment mentioned above, A various deformation | transformation and improvement are possible in the range described in the claim.

  For example, in the above-described embodiment, the counterweight 6 has been described as an example of the main body member, and the engine bonnet 5 has been described as an example of the opening / closing cover. However, the present invention can also be applied to other parts of the construction machine. For example, the opening / closing cover may be a side cover provided in a machine room on the side of the machine body, and the main body member may be a column or the like to which the side cover is attached.

  Moreover, although the bonnet 5 as an example of the above-mentioned opening / closing cover opens and closes up and down, the present invention may be applied to an opening and closing cover that opens and closes in the horizontal direction.

  In the above-described embodiment, the rear camera 9 has been described as an example of the detector. However, the position of the detector may be other than the rear, or may be a distance sensor other than the camera.

  In the first embodiment, the upper surface of the protective cover 7 coincides with the upper surface 64 of the counterweight and the lower end alignment seal surface 54A of the engine bonnet, but the upper surface of the protective cover and the upper surface of the counterweight do not necessarily coincide with each other. It does not have to be.

  In the second embodiment, the camera mounting member 94 is fixed to the upper surface of the lock device base plate 184. However, the camera mounting member 94 may be directly fixed to the upper surface of the counterweight.

1 hydraulic excavator, 2 lower traveling body, 3 upper turning body,
4 work attachments, 5 engine bonnet, 6 counterweight,
7 Protective cover, 8 Locking device, 9 Rear camera,
51 upper surface portion, 52 rear surface portion, 53 rotating shaft portion, 54 seal member,
54A, 54B, 54C sealing surface, 61 notch, 62 opening,
63 recess, 64 top surface, 65A protective cover mounting surface,
65B base plate mounting surface, 66 bottom surface, 67 rear surface,
71 upper surface, 72 upper rear surface, 73 lower lower surface, 74 bolts,
75 notches, 76 openings, 81 catches, 82 connecting members,
83 striker, 84 lock device base plate, 91 housing,
92 lens, 94 camera mounting member, 631 camera placement space,
632 Fixing fixture tightening space, 651 bolt hole, 844 bolt,
941 Base plate mounting portion, 942 Camera mounting portion,
943 Camera positioning screw, 944 Back nut,
107 protective cover, 184 lock device base plate,
163 bonnet upper surface rear end portion, 171 upper surface portion, 172 rear surface portion,
173 front surface portion, 174 side surface portion, 175 mounting portion, 176 bolt,
711 opening, 721 notch, 722,731 gap.

Claims (5)

In a construction machine comprising a main body member and an opening / closing cover that opens and closes with respect to the main body member,
A lock device that locks the open / close cover in a closed state with respect to the main body member;
The lock device includes a cover side lock member attached to the opening / closing cover, and a main body side lock member attached to the main body member and engaged with the cover side lock member,
With the open / close cover closed, a lock device opening is formed at a part of the boundary between the main body member and the open / close cover,
A detachable protective cover for covering the opening for the locking device is provided on the main body member,
In a state where the protective cover is not attached and the opening / closing cover is closed,
The engagement site between the cover side lock member and the main body side lock member is in a position where it can be seen from the outside through the opening for the lock device,
A construction machine, wherein a fixing tool for attaching the main body side locking member to the main body member is provided at a position that can be fastened from the outside through the opening for the locking device. A detector is disposed in the opening for the locking device,
The construction machine according to claim 1, wherein the protective cover has a detector opening formed at a position corresponding to the detector.   The construction machine according to claim 2, wherein a detector mounting member for mounting the detector is fixed to a lock device base plate constituting the main body side locking member. The main body member is a counterweight provided at the rear of the machine body to balance the weight with the work attachment,
The opening / closing cover is an engine bonnet that is provided at the rear of an engine room where the engine is arranged and opens and closes up and down,
The locking device is provided in an adjacent portion where the engine bonnet and the counterweight are vertically adjacent to each other,
The opening for the locking device is constituted by a recess formed in the rear end portion of the upper surface of the counterweight in the adjacent portion,
The construction machine according to claim 2, wherein the detector is provided below the main body side locking member. The main body member is a counterweight provided at the rear of the machine body to balance the weight with the work attachment,
The opening / closing cover is an engine bonnet that is provided at the rear of an engine room where the engine is arranged and opens and closes up and down,
The locking device is provided in an adjacent portion where the engine bonnet and the counterweight are vertically adjacent to each other,
The upper surface of the counterweight in the adjacent portion is configured as a flat surface,
The opening for the locking device is constituted by a notch formed at the lower end of the engine bonnet,
4. The construction machine according to claim 2, wherein the main body side locking member and the detector are provided on the flat surface so as to be adjacent to each other laterally.

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