JP2010007419A - Protective fence mounting structure of construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective fence mounting structure of construction machinery, which can change the height position of a protective fence without making the structure of the protective fence complicated. <P>SOLUTION: The protective fence mounting structure of the construction machinery is constituted by mounting the protective fence 16 on the upper turning body 3, and the protective fence 16 is provided with fence rod parts 21, 22, a plurality of strut parts 23, and a mounting part 24 provided to each strut part 23. The fence rod parts 21, 22 are extended in the lateral direction, and the plurality of strut parts 23 support the fence rod parts 21, 22. The mounting part 24 of the protective fence 16 is fixed to the upper turning body 3 with a bolt 30 which retains the protective fence 16 in an erection, and the mounting part 24 of the protective fence 16 and the upper turning body 3 are hinged to each other with a hinge 31. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a protective fence mounting structure for a construction machine that is suitable for application to, for example, a protective fence for fall prevention installed in an upper swing body of a hydraulic excavator.

  In general, a hydraulic excavator is composed of a lower traveling body in which a track frame is equipped with a crawler type traveling device, an upper revolving body that is swingably provided on the lower traveling body, and a bent undulation at a front center position of the upper revolving body. And a work machine that can be freely attached. A machine room for housing equipment such as an engine, a cooling device, and a hydraulic unit is provided in an intermediate portion in the front-rear direction of the upper swing body.

  On the upper surface side of the machine room, a passage for an operator to walk during maintenance work is provided. When the ground level of this passage is higher than a prescribed height defined by the ISO standard or the like, it is necessary to install a protective fence along the passage to prevent falling from the passage. The height of the protective fence needs to be set to a dimension greater than or equal to a predetermined value from the installation surface in order to satisfy ISO standards and the like. For this reason, when transporting the hydraulic excavator, the ground height of the protective fence may be higher than the height of the transportation regulation.

  Conventionally, in such a case, the protective fence is removed in advance before transportation, the transportation is carried out in this state, and the protective fence is attached again when it arrives at the destination. However, in this case, incidental work at the time of transportation becomes a difficult work.

  Therefore, the protective fence is divided into upper and lower fences, and the height of the protective fence is changed by connecting the upper fence to the lower fence so that it can be moved up and down or folded. For example, Patent Document 1 proposes a technique that enables the above.

JP-A-9-242122

  However, the technique according to Patent Document 1 has a problem that the structure of the protective fence itself is complicated because the upper fence is connected to the lower fence so that the upper fence can be moved up and down or folded. .

  The present invention has been made to solve such problems, and has a protective fence mounting structure for a construction machine that can change the height position of the protective fence without complicating the structure of the protective fence. It is intended to provide.

In order to achieve the above object, the construction machine protective fence mounting structure according to the present invention comprises:
Installation of a protection fence for a construction machine that attaches to the construction machine body a protection fence comprising a fence bar part extending in the lateral direction, a plurality of support parts that support the fence bar part, and an attachment part provided on each support part. Structure,
A fixture for holding the protective fence in an upright position is provided at the mounting portion of the protective fence, the mounting portion of the protective fence is fixed to the construction machine body, and the mounting portion of the protective fence and the construction machine body are It joins with a hinge (1st invention).

  In this invention, it is preferable that the holding means which hold | maintains the said protective fence in a tilting position is provided (2nd invention).

  Here, it is preferable that the holding means is a fixture for fixing the attachment portion of the protective fence to the construction machine main body (third invention).

  In this invention, the axis line of the said hinge shall be distribute | arranged to the direction along the arrangement direction of the some attaching part in the said protection fence (4th invention).

  In this invention, the axis line of the said hinge shall be arrange | positioned in the direction orthogonal to the arrangement direction of the some attaching part in the said protection fence in a horizontal surface (5th invention).

  According to the present invention, since the attachment part of the protective fence and the construction machine main body are joined by the hinge, the protective fence is rotated from the predetermined standing position by rotating the protective fence around the hinge after the fixing device is released. The height position can be lowered by tilting, and the height position of the protective fence can be changed. Such an operational effect is obtained by adopting a structure in which the mounting part of the protective fence and the construction machine main body are joined by a hinge, so that the structure of the protective fence itself is not complicated, and the protection of either newly installed or existing protection The present invention can also be applied to a fence.

  Further, by providing the holding means for holding the protective fence in the tilted position, it is possible to reliably prevent the protective fence from interfering with the construction machine main body during transportation. As this holding means, by using a fixture that fixes the mounting portion of the protective fence to the construction machine main body in order to hold the protective fence at a predetermined tilted position, it is possible to reliably suppress the swing of the protective fence during transportation. it can.

  Further, by arranging the axis of the hinge in a direction along the arrangement direction of the plurality of mounting portions in the protective fence, for example, when the protective fence is installed along the edge of the construction machine body, the protective fence is attached to the construction machine body. Tilt and stand up in and out.

  In addition, by arranging the axis of the hinge in a direction orthogonal to the arrangement direction of the plurality of mounting portions in the protective fence in the horizontal plane, for example, when the protective fence is installed along the edge of the construction machine body, the protective fence is Tilt and stand up along the edge of the construction machine body.

Next, a specific embodiment of a protective fence mounting structure for a construction machine according to the present invention will be described with reference to the drawings.
The embodiment described below is an example in which the present invention is applied to a hydraulic excavator as a construction machine. However, the present invention is not limited to this, and the present invention is also applied to a construction machine such as a crawler crane. be able to.
Further, in the description of the embodiments described below, the front / rear and left / right directions are made to coincide with the front / rear and left / right directions in a state where the driver is seated on the driver's seat unless otherwise specified.

[First Embodiment]
FIG. 1 is an overall perspective view showing the hydraulic excavator according to the first embodiment of the present invention with the working machine removed.
FIG. 2 is an explanatory diagram of the protective fence mounting structure according to the first embodiment, and is a view taken along arrows A-A in FIG. 1 (a) and views B (b) and (b) in FIG. C view (c) is shown respectively.
FIG. 3 shows an enlarged view of a portion D in FIG.

A hydraulic excavator 1 shown in FIG. 1 includes a lower traveling body 2 in which a track frame is equipped with a crawler type traveling device, and an upper revolving body 3 that is swingably provided on the lower traveling body 2 (the “construction machine of the present invention” And a work machine (not shown) that is attached to the front center position of the upper swing body 3 so as to be able to bend and undulate freely.
A cab 4 that constitutes a cab is installed on the left side of the front part of the upper swing body 3, and steps 5 and 6 for getting on and off the upper swing body 3 are provided on the right side of the front part of the upper swing body 3. A machine chamber 7 is provided in the middle part of the upper swing body 3 in the front-rear direction. The machine chamber 7 is provided for housing equipment such as an engine, a cooling device, and a hydraulic unit. A counterweight 8 is disposed at the rear of the upper swing body 3. Has been.

The machine room 7 mainly includes an engine hood 9 that covers the upper side of the engine housed in the machine room 7, a required ceiling cover 10 that covers the upper side of other equipment housed in the machine room 7, and the machine room. 7 is defined by a required side cover 11 that covers the side of the other devices housed in 7.
A central passage 12 extending in the left-right direction on the front side of the engine hood 9 is provided on the upper surface side of the machine room 7 as a passage for an operator to walk during maintenance work. Side passages 13 are provided so as to connect each other.

A handrail 14 is installed on the right edge portion of the upper swing body 3 along the arrangement path of steps 5 and 6 so that the upper swing body 3 can be safely boarded and exited. Further, a protective fence 15 is installed at the right edge of the upper swing body 3 to prevent an operator on the side passage 13 from falling to the right outside of the upper swing body 3, and the central path 12. A protective fence 16 is installed to prevent the upper worker from falling to the right outside of the upper swing body 3.
On the other hand, a protective fence 17 is installed at the left edge of the upper swing body 3 to prevent an operator on the central passage 12 from falling to the left outer side of the upper swing body 3.

  All of the protective fences 15, 16, and 17 are manufactured using a round pipe material, and the basic configuration is the same. In the following, the protection fence 16 installed on the right side of the central passage 12 will be described as a representative, and the description of the other protection fences 15 and 17 will be omitted.

  As shown in FIG. 2 (b), the protective fence 16 includes a first fence bar part 21 and a second fence bar part 22 that extend in the front-rear direction and are parallel to each other with a predetermined interval in the vertical direction. In order to support the fence bar part 21 and the second fence bar part 22, it has two support | pillar parts 23 provided in the front and back. As shown in FIG. 2A, each column portion 23 is provided with a mounting portion 24 so as to project inward of the upper swing body 3 from the lower end portion thereof. The front end portion of each attachment portion 24 is flattened in the vertical direction by pressing or the like. As shown in FIG. 3, two bolt insertion holes 25 penetrating in the vertical direction are formed at a predetermined pitch in the longitudinal direction of the mounting portion 24 at the tip of each flattened mounting portion 24. Yes.

  As shown in FIG. 2 (c), the protective fence 16 is attached to the upper swing body 3 via a protective fence attachment base 26 fixed to the ceiling cover 10 so as to correspond to the front and rear attachment portions 24. Yes. As shown in FIG. 3, each protection fence mounting base 26 has a first attachment seat portion 27 that serves as a receiving seat for the attachment portion 24 of the protection fence 16, and an upper swivel with a step in the first attachment seat portion 27. The second mounting seat portion 28 is continuously provided on the inward side of the body 3 and has a height lower than that of the first mounting seat portion 27.

  A screw hole 29 corresponding to the bolt insertion hole 25 formed in the mounting portion 24 of the protective fence 16 is provided in the first mounting seat portion 27 of each protective fence mounting base 26. By tightening a bolt 30 (corresponding to the “fixing tool that holds the protective fence in the upright position” of the present invention) screwed into the screw hole 29 through the bolt insertion hole 25, the protective fence 16 is shown by a solid line in FIG. Held in a predetermined standing position. When the protective fence 16 is held at a predetermined standing position, the first fence rod portion 21 is arranged from the ceiling cover 10 at a predetermined height position that conforms to regulations such as ISO standards.

  As shown in FIG. 3, the second mounting seat portion 28 of the protective fence mounting base 26 and the mounting portion 24 of the protective fence 16 are joined by a hinge 31. The hinge 31 includes a first hinge piece 32 fixed to the mounting portion 24 of the protective fence 16 and a second hinge piece 34 fastened with a bolt 33 to the second mounting seat portion 28 of the protective fence mounting base 26. It is configured to be connected by a pin 35 that is a moving center axis. As shown in FIG. 2C, the axis Q of the pin 35 extends in the direction along the arrangement direction of the two front and rear mounting portions 24 in the protective fence 16, and the protective fence 16 is removed after the bolt 30 is removed. 2, the protective fence 16 is tilted inwardly of the upper swing body 3 by rotating clockwise around the pin 35 in FIG. 2A, and is indicated by a two-dot chain line in FIG. Thus, the height position can be lowered. On the contrary, by rotating the tilted protective fence 16 counterclockwise in FIG. 2A around the pin 35, the protective fence 16 is raised to the outside of the upper swing body 3. Thus, the height position can be increased as shown by the solid line in FIG.

  Next, a holding means for holding the protective fence 16 at a predetermined tilt position in which the protective fence 16 is tilted 90 degrees inward of the upper swing body 3 around the pin 35 of the hinge 31 from the predetermined standing position will be described. .

  In the present embodiment, a fixture 36 as shown in FIG. 4 is employed as a holding means for holding the protective fence 16 in the tilted position. The fixing device 36 is used for holding the tilt position, which is disposed between the mounting portion 24 of the protective fence 16 and the first mounting seat portion 27 of the protective fence mounting base 26 when the protective fence 16 is in a predetermined tilt position. The bracket 37 and a total of four bolts 30 that are originally used to hold the protective fence 16 in a predetermined standing position are configured.

  The tilt position holding bracket 37 is connected to the base portion 38 that engages with the first mounting seat portion 27 of the protective fence mounting base 26, and is connected to the base portion 38 in a rising shape, and is engaged with the mounting portion 24 of the protective fence 16. And a rising portion 39. Bolt insertion holes 40 corresponding to the screw holes 29 provided in the first mounting seat portion 27 of the protective fence mounting base 26 are formed in the base portion 38. A bolt insertion hole 41 corresponding to the bolt insertion hole 25 provided in the mounting portion 24 of the protective fence 16 is formed in the rising portion 39, and a nut 42 is fixed to correspond to each bolt insertion hole 41. Has been.

  Originally, two bolts 30 out of a total of four bolts 30 used for holding the protective fence 16 in a predetermined standing position are respectively bolt insertion holes in the base portion 38 of the tilt position holding bracket 37. 40 is screwed into the screw hole 29 in the first mounting seat portion 27 of the protective fence mounting base 26 and tightened, and the remaining two bolts 30 are respectively held in the bolt insertion hole 25 and the tilted position in the mounting portion 24 of the protective fence 16. By fastening with the nut 42 fixed to the rising portion 39 through the bolt insertion hole 41 in the rising portion 39 of the bracket 37, the protective fence 16 is in a predetermined tilt position indicated by a two-dot chain line in FIG. Retained. When the protective fence 16 is held at a predetermined tilt position, the ground height of the protective fence 16 in the transport posture is set to a height less than the transport height regulation value.

  In the protective fence mounting structure of the present embodiment configured as described above, when the hydraulic excavator 1 is used at the work site, the mounting portion 24 of the protective fence 16 is used as shown in FIG. Is fastened to the protective fence mounting base 26 with a bolt 30 to hold the protective fence 16 in a predetermined standing position indicated by a solid line in FIG. When the protective fence 16 is held at a predetermined standing position, the first fence bar portion 21 is arranged from the ceiling cover 10 at a predetermined height position that conforms to the regulations such as the ISO standard. Can be prevented.

  When the excavator 1 is moved from the work site to another place, all four bolts 30 that fasten the mounting portion 24 of the protective fence 16 to the protective fence mounting base 26 are first removed. Thereafter, the protective fence 16 is tilted 90 degrees inward of the upper swing body 3 around the pin 35 of the hinge 31 from a predetermined standing position shown by a solid line in FIG. A predetermined tilt position indicated by a chain line is used. Next, as shown in FIG. 4, the tilt position holding bracket 37 is disposed between the mounting portion 24 of the protective fence 16 and the first mounting seat portion 27 of the protective fence mounting base 26. Then, the base portion 38 of the tilt position holding bracket 37 is fastened to the first mounting seat portion 27 of the protective fence mounting base 26 using two bolts 30 out of the total of four bolts 30 previously removed. The remaining two bolts 30 are used to fasten the mounting portion 24 of the protective fence 16 and the rising portion 39 of the tilt position holding bracket 37. Thereby, the protection fence 16 is hold | maintained in the predetermined tilt position shown with a dashed-two dotted line in Fig.2 (a). When the protective fence 16 is held at a predetermined tilt position, the ground height of the protective fence 16 in the transportation posture can be set to a height less than the transportation height regulation value.

  When transportation of the hydraulic excavator 1 is completed and the hydraulic excavator 1 is used again, a total of four bolts 30 used for fastening the tilt position holding bracket 37 to the protective fence 16 and the protective fence mounting base 26 are used. Remove all. Thereafter, the protective fence 16 is raised 90 degrees from the predetermined tilt position indicated by the two-dot chain line in FIG. 2A around the pin 35 of the hinge 31 to the outside of the upper swing body 3 in FIG. 2A. A predetermined standing position indicated by a solid line is used. Next, the mounting portion 24 of the protection fence 16 is fastened to the protection fence mounting base 26 using a total of four bolts 30 previously removed, and the protection fence 16 is held in a predetermined standing position.

According to the protective fence mounting structure of the present embodiment, the height of the protective fence 16 can be increased in accordance with the work of the hydraulic excavator 1 and the transportation by the standing and tilting work around the hinge 31 of the protective fence 16 and the attaching / detaching work of the bolt 30. The position can be easily switched between a predetermined standing position and a predetermined tilt position.
Further, as an incidental work during transportation, light work such as standing and tilting work around the hinge 31 of the protective fence 16 and attachment / detachment work of the bolt 30 is sufficient, and conventional heavy work, that is, the protective fence 16 during transportation. And carry it down from the upper swing body 3 or carry the protective fence 16 separately stored during the work to the upper swing body 3 and attach the protective fence 16 to the upper swing body 3 again. Since there is no need to do this, it is possible to reduce incidental work during transportation.
Further, at the time of transportation, the protective fence 16 is held at a predetermined tilt position indicated by a two-dot chain line in FIG. Needless to say, it is possible to prevent the protection fence 16 from swinging during transportation.

[Second Embodiment]
FIG. 5 is an explanatory diagram of the protective fence mounting structure according to the second embodiment, and is a view of the protective fence installed on the right side of the central passage from the inside of the upper swing body (a), as viewed from arrow E in FIG. F arrow views (c) of FIGS. (B) and (a) are respectively shown.
FIG. 6 shows an enlarged view of the G part in FIG.
In the present embodiment, the same or similar parts as those in the first embodiment will be denoted by the same reference numerals in the drawings, and detailed description thereof will be omitted. Hereinafter, the first embodiment is different from the first embodiment. The explanation will focus on points.

  As shown in FIGS. 5A and 5B, the protective fence 16 includes a front protective fence mounting base 51 fixed to the ceiling cover 10 so as to correspond to the front mounting section 24, and a rear mounting section 24. Is attached to the upper swing body 3 via a rear protective fence mounting base 52 fixed to the ceiling cover 10 so as to correspond to the above.

  As shown in FIG. 5A, the front protective fence mounting base 51 is provided with a screw hole 29 corresponding to the bolt insertion hole 25 formed in the front mounting portion 24 of the protective fence 16. .

As shown in FIG. 6, the rear protection fence mounting base 52 includes a first mounting seat portion 53 that serves as a receiving seat for the rear mounting portion 24 of the protection fence 16, and a step in the first mounting seat portion 53. The second mounting seat portion 54 is continuously provided on the rear side and has a lower height than the first mounting seat portion 53.
A screw hole 29 corresponding to the bolt insertion hole 25 formed in the rear mounting portion 24 of the protective fence 16 is provided in the first mounting seat portion 53 of the rear protective fence mounting base 52.

  Then, by tightening the bolt 30 that is screwed into the screw hole 29 through the bolt insertion hole 25, the protective fence 16 is held at a predetermined standing position indicated by a solid line in FIG. When the protective fence 16 is held at a predetermined standing position, the first fence rod portion 21 is arranged from the ceiling cover 10 at a predetermined height position that conforms to regulations such as ISO standards.

  The second mounting seat portion 54 of the rear protection fence mounting base 52 and the rear mounting portion 24 of the protection fence are joined by a hinge 31. As shown in FIG. 5B, the axis Q of the pin 35 of the hinge 31 extends in a direction orthogonal to the arrangement direction of the two front and rear mounting portions 24 in the protective fence 16 in the horizontal plane, and the bolt 30 After removing the protective fence 16, the protective fence 16 is rotated clockwise around the pin 35 in FIG. 5A to tilt the protective fence 16 rearward along the right edge of the upper swing body 3. The height position can be lowered as shown by the two-dot chain line in FIG. On the contrary, by rotating the tilted protective fence 16 counterclockwise in FIG. 5A around the pin 35, the protective fence 16 is moved forward along the right edge of the upper swing body 3. The height position can be raised as shown by the solid line in FIG.

  Next, the protective fence 16 is tilted 90 degrees in the rearward direction of the upper swing body 3 around the pin 35 of the hinge 31 from the predetermined standing position shown by the solid line in FIG. 5A. A holding means for holding the protective fence 16 at a predetermined tilt position indicated by a dotted line will be described.

  In the present embodiment, a fixture 55 as shown in FIG. 7 is employed as a holding means for holding the protective fence 16 in the tilted position. The fixing device 55 is used for holding the tilt position, which is disposed between the mounting portion 24 of the protective fence 16 and the first mounting seat portion 53 of the protective fence mounting base 52 when the protective fence 16 is at a predetermined tilt position. The bracket 56 and a total of four bolts 30 originally used for holding the protective fence 16 in a predetermined standing position are configured.

  The tilt position holding bracket 56 is connected to the base portion 57 engaged with the first mounting seat portion 53 of the protective fence mounting base 52, and is connected to the base portion 57 in a rising shape, and is engaged with the mounting portion 24 of the protective fence 16. And a rising portion 58. Bolt insertion holes 59 corresponding to the screw holes 29 provided in the first mounting seat portion 53 of the protective fence mounting base 52 are formed in the base portion 57. A bolt insertion hole 60 corresponding to the bolt insertion hole 25 provided in the attachment portion 24 of the protective fence 16 is formed in the rising portion 58, and a nut 61 is fixed to correspond to each bolt insertion hole 60. Has been.

  Originally, two bolts 30 out of a total of four bolts 30 used to hold the protective fence 16 in a predetermined standing position are respectively bolt insertion holes in the base portion 57 of the tilt position holding bracket 56. 59 and screwed into the screw hole 29 in the first mounting seat 53 of the protective fence mounting base 52 and tightened, and the remaining two bolts 30 are respectively held in the bolt insertion hole 25 and the tilted position in the mounting part 24 of the protective fence 16. By fastening with the nut 61 fixed to the rising portion 58 through the bolt insertion hole 60 in the rising portion 58 of the bracket 56, the protective fence 16 is in a predetermined tilt position indicated by a two-dot chain line in FIG. Retained. When the protective fence 16 is held at a predetermined tilt position, the ground height of the protective fence 16 in the transport posture is set to a height less than the transport height regulation value.

  Also by the protection fence attachment structure of this embodiment as described above, the same effect as the protection fence attachment structure of 1st Embodiment can be obtained.

  As mentioned above, although the protection fence attachment structure of the construction machine of this invention was demonstrated based on several embodiment, this invention is not limited to the structure described in the said embodiment, The structure described in each embodiment The configuration can be changed as appropriate without departing from the spirit of the invention, for example, by appropriately combining them.

  For example, as shown in FIG. 8, the protective fence mounting structure of the first embodiment is applied to the protective fence 16 installed on the right side of the central passage 12, and the protective fence 15 installed on the side passage 13. And the protective fence 16 installed on the left side of the central passage 12 is applied to the protective fence mounting structure of the second embodiment, and the protective fence 16 tilts and stands up inward and outward of the upper swing body 3; By appropriately combining protective fences 15 and 17 that tilt and stand up along the edge of the upper swing body 3, the size of the installation space on the upper swing body 3 and interference with peripheral devices such as work machines (not shown) can be reduced. In consideration, the protective fences 15, 16, and 17 can be appropriately installed.

  Moreover, it can replace with the hinge 31 in the protection fence attachment structure of 1st Embodiment and 2nd Embodiment, and can also employ | adopt the hinge 62 as shown to Fig.9 (a) (b). 9 (a) and 9 (b), the hinge 62 is bolted to the cylindrical boss 63 fixed to the mounting portion 24 of the protective fence 16 and the second mounting seat portion 28; 54 of the protective fence mounting base 26; 52. The bracket 64 fastened at 33 is connected by a pin 65 which is a rotation center axis, and the bracket 64 is overlapped with the second mounting seat portion 28; 54 of the protective fence mounting base 26; 52. And a pair of pin support members 67 (only one on the side is shown) that are erected on the base member 66 and support both ends of the pin 65.

  9 (a) and 9 (b), the bracket 64 may be of a type in which a bolt 33 is tightened on the base member 66 outside the pair of pin support members 67, as shown in FIG. ), Any of the types in which a fastening margin for the bolt 33 is provided on the base member 66 ′ inside the pair of pin support members 67 ′ may be used.

  Further, for example, a fixture as shown in FIG. 10 can be adopted as a fixture for holding the protective fence 16 in a predetermined standing position.

  10 is a stud having a head that is implanted in the first mounting seat portion 27 of the protective fence mounting base 26 and passes through the mounting portion 24 of the protective fence 16 and is exposed from the mounting portion 24. The stud shown in FIG. The pin 70 is configured to include a snap pin 71 inserted into a hole formed in the head of the stud pin 70 and penetrating in the radial direction. What is indicated by reference numeral 72 is a washer that is fitted into the stud pin 70 and interposed between the head of the snap pin 70 and the mounting portion 24 of the protective fence 16. Here, the stud pin insertion hole 73 formed in the mounting portion 24 of the protective fence 16 in order to allow the stud pin 70 to pass through the mounting portion 24 of the protective fence 16 is centered on the pin 35 of the hinge 31. The size and shape of the stud pin 70 are determined so that the stud pin 70 can be inserted and removed without any trouble when rotated.

  According to the fixture shown in FIG. 10, by removing or inserting the snap pin 71 with a finger, the fixing of the protective fence 16 to the protective fence mounting base 26 is released, or the protective fence mounting base 26 is fixed. Since the protective fence 16 can be fixed, there is an advantage that the fixing / unlocking of the protective fence 16 with respect to the protective fence mounting base 26 can be operated without using a tool.

  When the fixing tool shown in FIG. 10 is adopted, a fixing tool 74 as shown in FIG. 11A can be adopted as a holding means for holding the protective fence 16 at a predetermined tilted position.

  The fixing tool 74 shown in FIG. 11A is provided between the mounting portion 24 of the protective fence 16 and the first mounting seat portion 27 of the protective fence mounting base 26 when the protective fence 16 is in a predetermined tilted position. The tilt position holding bracket 75 is provided, and a total of four snap pins 71 used to hold the protective fence 16 in a predetermined standing position are originally provided.

  As shown in FIG. 11 (b), the tilt position holding bracket 75 is provided with a base portion 76 that engages with the first mounting seat portion 27 of the protective fence mounting base 26, and is connected to the base portion 76 in a rising shape. And a rising portion 77 that engages with the mounting portion 24 of the protective fence 16. A stud pin insertion hole 78 is formed in the base portion 76 so as to correspond to the stud pin 70 provided in the first mounting seat portion 27 of the protective fence mounting base 26. In the rising portion 77, a stud pin 79 similar to the stud pin 70 provided in the first mounting seat portion 27 of the protective fence mounting base 26 is provided in the stud pin insertion hole 73 provided in the mounting portion 24 of the protective fence 16. It is implanted to correspond to.

  Then, as shown in FIG. 11A, the stud pin 70 of the protective fence mounting base 26 is passed through the base portion 76 of the tilt position holding bracket 75 and the tilt position holding means 24 is attached to the mounting portion 24 of the protective fence 16. By inserting the washer 80; 72 and the snap pin 71; 71 sequentially into the stud pin 70; 79 by passing the stud pin 79 of the rising portion 77 of the bracket 75, the protective fence 16 is shown by a two-dot chain line in FIG. It is held at the predetermined tilt position shown.

  For example, as shown in FIG. 12, when the protective fence mounting structure of the first embodiment is applied to both the protective fence 16 on the right side of the central passage 12 and the protective fence 17 on the left side of the central passage 12. A holding means as shown in the figure can be employed.

  In FIG. 12, the left and right protection fences 17 and 16 facing each other on the central passage 12 are tilted inward of the upper swing body 3 so as to abut each other's first fence rod portions 21. As a holding means for holding the tilted positions of the left and right protective fences 17 and 16 shown in FIG. 12, a binding band that binds the first fence bar portions 21 to each other and the first fence rod portions 21 between each other are sandwiched. A restraining tool 81 such as a clamping device to be attached can be used.

The whole perspective view showing the excavator concerning a 1st embodiment of the present invention in the state where the working machine was removed. It is explanatory drawing of the protection fence attachment structure which concerns on 1st Embodiment, AA arrow view (a) of FIG. 1, B arrow view (b) of (a), and C arrow view of (b) ( c) Part D enlarged view of FIG. Structural explanatory drawing of the fixture that holds the protective fence in the tilted position (first embodiment) It is explanatory drawing of the protection fence attachment structure which concerns on 2nd Embodiment, The figure (a) which looked at the protection fence installed in the center channel | path right side from the inner side of an upper revolving body, E arrow view (b) of (a), F arrow view of (a) (c) G part enlarged view of Fig.5 (a) Structural explanatory drawing of the fixture that holds the protective fence in the tilted position (second embodiment) The figure which shows an example of the inclination state of the protection fence at the time of combining the protection fence attachment structure which concerns on 1st Embodiment and 2nd Embodiment Illustration of another example of hinge Explanatory drawing of another example of a fixture holding a protective fence in a standing position Explanatory drawing of another example of the fixture that holds the protective fence in the tilted position Explanatory drawing of another example of the holding means which hold | maintains a protection fence in a tilting position

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 3 Upper turning body 15, 16, 17 Protective fence 21 1st fence bar part 22 2nd fence bar part 23 Supporting part 24 Mounting part 30 Bolt 31, 62 Hinge 36, 55, 74 Fixing tool 70 Stud pin 71 Snap Pin 72 Washer 81 Restraint

Claims (5)

Installation of a protection fence for a construction machine that attaches to the construction machine body a protection fence comprising a fence bar part extending in the lateral direction, a plurality of support parts that support the fence bar part, and an attachment part provided on each support part. Structure,
A fixture for holding the protective fence in an upright position is provided at the mounting portion of the protective fence, the mounting portion of the protective fence is fixed to the construction machine body, and the mounting portion of the protective fence and the construction machine body are A protective fence mounting structure for construction machinery, which is joined by a hinge.   The protection fence attachment structure for a construction machine according to claim 1, wherein holding means for holding the protection fence in an inclined position is provided.   The protection fence attachment structure for a construction machine according to claim 2, wherein the holding means is a fixture that fixes an attachment portion of the protection fence to the construction machine main body.   The protection fence attachment structure for a construction machine according to any one of claims 1 to 3, wherein an axis of the hinge is arranged in a direction along an arrangement direction of the plurality of attachment portions in the protection fence.   The protection fence attachment structure for a construction machine according to any one of claims 1 to 3, wherein an axis of the hinge is arranged in a direction orthogonal to an arrangement direction of the plurality of attachment portions in the protection fence within a horizontal plane.

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