JP2009143304A - Construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To commonly use a floor for a cab and a canopy even if the canopy is mounted to a floor to which the cab has been mounted instead of the cab. <P>SOLUTION: A mounting pedestal 21 of an anti-vibration mount 20 for supporting a cab 18 on a floor 11 while preventing vibration is detachably mounted to front side floor plates 12, 14 using a mounting bolt 22. Accordingly, the mounting pedestal 21 of the anti-vibration mount 20 can be simply mounted to the floor 11 by the mounting bolt 22. Also, when the mounting bolt 22 is loosened and the mounting pedestal 21 of the anti-vibration mount 20 is detached from the floor 11, the mounting pedestal 21 hindering the mounting of a canopy 30 can be eliminated so as to mount the canopy 30 on the floor 11. Thereby, when the canopy 30 is mounted instead of a cab 18, one floor 11 can be commonly used for both the cab 18 and the canopy 30. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a construction machine such as a hydraulic excavator, and more particularly to a construction machine to which a cab or a canopy can be attached.

  In general, a hydraulic excavator is known as a representative example of a construction machine. The hydraulic excavator includes a lower traveling body capable of self-propelling, an upper revolving body that is rotatably mounted on the lower traveling body, and the upper excavator. It is comprised by the working apparatus provided in the front side of the revolving body so that a heel-up-and-down movement was possible.

  The upper swing body includes a swing frame that forms a support structure, a driver seat that is provided on the swing frame and on which an operator sits, and a floor that is positioned on the front side of the driver seat and is provided on the frame. And a cab that is provided on the floor and covers the periphery and top of the driver's seat, and an engine, a hydraulic pump, and the like that are mounted on the rear side of the turning frame.

  Here, in the case of a cab specification hydraulic excavator, the cab is attached to the floor in a vibration-proof state via a vibration-proof mount made of an elastic rubber member or the like (see, for example, Patent Document 1).

JP 2002-115267 A

  The anti-vibration mount is composed of a mounting base, an elastic member, a stopper, a fixing bolt, and the like. This anti-vibration mount is, for example, fixed by attaching welding bases to the revolving frame side using welding means, and assembled to the mounting bases so that elastic members, stoppers, part of cabs, etc. are stacked, and these are attached to the mounting bases with fixing bolts. (See, for example, Patent Document 2).

JP 2005-219634 A

  On the other hand, the hydraulic excavator includes an ultra-small hydraulic excavator called a mini excavator. In this type of hydraulic excavator, a canopy that covers the upper side of the driver's seat may be attached instead of the cab.

  By the way, the hydraulic excavator according to the related art described above has a configuration in which a mounting base of a vibration isolating mount is fixed to the revolving frame side using welding means, and a cab is attached via the vibration isolating mount. Moreover, the hydraulic excavator may replace the cab with a canopy depending on the working environment or the like. In this case, the cab is removed together with the vibration-proof mount, and the canopy is attached to the floor instead.

  However, since the position where the anti-vibration mount of the cab is attached and the position where the canopy is attached are substantially the same position, the attachment base remaining on the floor side interferes with the attachment part of the canopy. In this way, when the mounting base interferes with the canopy, for example, the floor on the swivel frame side must be changed to a canopy floor, and the installation work of the floor, hydraulic equipment, hydraulic piping, etc. is necessary. Therefore, there is a problem that a great deal of labor and time are required.

  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 be able to attach a canopy instead of a cab to the floor where the cab is attached, so that the cab and the canopy can share the floor. Is to provide a construction machine.

  The construction machine according to the present invention includes a frame having a support structure and a working device attached to the front side, a driver seat provided on the frame and seated by an operator, and positioned on the front foot of the driver seat. And a mounting base for an anti-vibration mount provided on the floor for anti-vibration support of the cab.

  And in order to solve the above-mentioned subject, the feature of the configuration adopted by the invention of claim 1 is such that the mounting base of the anti-vibration mount is detachably mounted on the floor by using bolts. There is.

  According to a second aspect of the present invention, the mounting base of the anti-vibration mount is a canopy that is attached to the floor using the bolt when the cab that covers the periphery and top of the driver seat is mounted on the floor, and covers the driver seat. It is in the structure which removes from the said floor when attaching.

  According to a third aspect of the present invention, the bolt insertion hole through which the bolt is inserted is formed as a large-diameter hole having a larger diameter than the bolt in order to adjust the mounting position of the mounting base.

  According to the first aspect of the present invention, the anti-vibration mount provided for anti-vibration support of the cab on the floor is configured such that the mounting base is detachably attached to the floor on the frame side by using bolts.

  Therefore, the mounting base of the vibration-proof mount can be easily attached to the floor with the bolts. Thereby, a cab can be attached to a mounting base with the other components which comprise an anti-vibration mount. On the other hand, when the bolt is loosened and the mounting base of the anti-vibration mount is removed from the floor, the mounting base can be excluded from the mounting position of the canopy, and the canopy can be easily mounted on the floor.

  As a result, even when the canopy is installed instead of the cab, one floor can be shared by both the cab and the canopy by removing the mounting base of the anti-vibration mount, making it easy to change from the cab to the canopy. It can be carried out. In addition, one type of floor can be provided, and productivity can be improved and manufacturing costs can be reduced. Furthermore, when neither a cab nor a canopy is attached to the floor, the floor can be flattened by removing the mounting base.

  According to invention of Claim 2, when mounting the cab which covers the circumference | surroundings and upper direction of a driver's seat on a floor, it can attach to a floor using a volt | bolt. On the other hand, the canopy that covers at least the upper part of the driver's seat can be attached to the floor by loosening the bolt and removing the mounting base of the vibration-proof mount from the floor.

  According to the invention of claim 3, the bolt insertion hole through which the bolt is inserted is formed as a large-diameter hole having a diameter larger than that of the bolt in order to adjust the mounting position of the mounting base. When mounting the bracket, by loosening the bolt, the position of the mounting base can be adjusted by an amount corresponding to the gap between the bolt and the large-diameter hole, and the cab can be disposed at an accurate position by a simple operation.

  Hereinafter, as an example of a construction machine according to an embodiment of the present invention, an ultra-small hydraulic excavator provided with a crawler type lower traveling body will be described as an example, and will be described in detail with reference to FIGS. In this embodiment, a case will be described in which a cab-type hydraulic excavator equipped with a cab is changed to a canopy-type hydraulic excavator equipped with a canopy.

  In FIG. 1, reference numeral 1 denotes a cab specification hydraulic excavator as a typical example of a construction machine used for earth and sand excavation work. The hydraulic excavator 1 includes a self-propelled crawler-type lower traveling body 2, an upper revolving body 3 that is turnably mounted on the lower traveling body 2, and swinging and raising the front of the upper revolving body 3. The working device 4 is provided so as to be movable, and the earth removing device 5 is provided on the front side of the lower traveling body 2.

  Further, the upper swing body 3 is formed very compact corresponding to the vehicle size of the hydraulic excavator 1. As shown in FIG. 2, the upper swing body 3 includes a swing frame 6, an engine, a hydraulic pump, a hydraulic oil tank, a fuel tank (not shown), a driver seat base 7, a driver seat 8, a floor, which will be described later. 11, a cab 18, an anti-vibration mount 20, and the like.

  Reference numeral 6 denotes a revolving frame as a frame that forms a support structure of the upper revolving structure 3. As shown in FIG. 3, the revolving frame 6 includes a bottom plate 6A formed using a thick steel plate and the left and right vertical plates erected on the bottom plate 6A so as to extend forward and backward. 6B, left and right side frames 6C provided to extend left and right on both left and right sides of each vertical plate 6B, and a plurality of overhanging beams connecting the vertical plate 6B and the side frame 6C. 6D and a cylindrical support bracket 6E that is provided at the front end of each of the vertical plates 6B and supports the swing type work device 4 are roughly configured.

  An engine, a hydraulic pump, and the like are mounted on the rear side of the turning frame 6, a hydraulic oil tank, a fuel tank, and the like are mounted on the right front side, and a floor support member 10 of the floor 11 described later is mounted on the left front side. A control valve device (both not shown) and the like are mounted on the top.

  Reference numeral 7 denotes a driver seat base provided on the rear side of the turning frame 6. As shown in FIGS. 8 and 9, the driver seat base 7 is formed in a step shape so as to cover the front side and the upper side of the engine.

  A driver's seat 8 is provided on a driver's seat pedestal 7 on the revolving frame 6, and is seated by an operator who operates the excavator 1. On the left and right sides of the driver's seat 8, operation levers 9 for operating the work device 4 and the like are disposed.

  Reference numeral 10 denotes a floor support member provided on the left front side of the revolving frame 6. As shown in FIG. 4, the floor support member 10 is composed of a rectangular mounting plate 10A extending in the front and rear directions, and two columns 10B and 10C erected on the front side of the mounting plate 10A. A front floor plate 12 of a floor 11, which will be described later, is attached on each of the columns 10B, 10C. The floor support member 10 has a mounting plate 10A mounted on the revolving frame 6, and a control valve device or the like is mounted on the mounting plate 10A. As described above, the floor support member 10 constitutes a part of the revolving frame 6, but is also used as a mounting base for the floor 11.

  Reference numeral 11 denotes a floor provided on the revolving frame 6 at the foot of the front side of the driver's seat 8. In the case of the present embodiment, as shown in FIGS. 2 and 4, the floor 11 is constituted by three floor plates including a front floor plate 12, a rear floor plate 13 and a right front floor plate 14 which will be described later. . The floor 11 forms a substantially flat landing place above the front side of the revolving frame 6.

  The floor 11 of the present embodiment is formed by, for example, three (three divided) floor plates 12, 13, and 14. However, since the floor 11 is divided into three parts in consideration of assembly workability, maintenance workability, etc., the floor 11 is formed by a single plate or divided into two parts or four parts or more. There is no problem.

  Reference numeral 12 denotes a front-side floor plate that is positioned on the front portion of the revolving frame 6 and is provided on each of the columns 10B and 10C of the floor support member 10. The front floor plate 12 is formed as a rectangular plate extending in the left and right directions. Further, a central mounting hole 12A for mounting a valve unit (not shown) of a travel lever / pedal 15 to be described later is formed substantially at the center of the front floor plate 12, and both left and right sides of the central mounting hole 12A are formed. The left mounting hole 12B and the right mounting hole 12C for mounting the valve unit of the spare pedal 16 and the valve unit of the swing pedal 17 (both not shown) are formed. Thereby, the front floor plate 12 also constitutes a valve bracket that supports various valves.

  Further, two bolt insertion holes 12 </ b> D are formed in the left front position of the front floor plate 12 so as to be separated in the left and right directions. As shown in FIG. 6, these two bolt insertion holes 12 </ b> D are used to insert a mounting bolt 22 of a vibration-proof mount 20 described later, and are formed as large-diameter holes having a diameter larger than that of the mounting bolt 22. ing. Accordingly, the bolt insertion hole 12D can be adjusted in position by moving the vibration isolating mount 20 in the horizontal direction by the gap between the bolt 22 and the mounting bolt 22 when the mounting bolt 22 is loosened.

  Further, the front floor plate 12 is formed with one bolt relief hole 12E located between the two bolt insertion holes 12D. The bolt relief hole 12E is for avoiding the protruding end when a fixing bolt 28 of the vibration-proof mount 20 described later protrudes from the lower surface of the mounting base 21.

  Reference numeral 13 denotes a rear floor plate provided on the rear side of the front floor plate 12. The rear floor plate 13 is formed as a rectangular plate extending in the left and right directions. Further, the rear floor plate 13 constitutes a main floor plate located at the feet of the operator seated on the driver's seat 8.

  Further, 14 is a right front floor plate provided so as to be continuous with the right side of the front floor plate 12 (see FIGS. 4 and 7), and the right front floor plate 14 is formed as a substantially rectangular plate. Yes. Further, the right front floor plate 14 is formed with a bolt insertion hole 14A and a bolt relief hole 14B formed in the same manner as the bolt insertion hole 12D and the bolt relief hole 12E of the front floor plate 12.

  Here, a front side portion of a cab 18 described later is attached to the front side portion of the floor 11. Accordingly, the vibration-proof mount 20 is attached to the front floor plate 12 and the right front floor plate 14 using mounting bolts 22 described later that are inserted into the respective bolt insertion holes 12D and 14B.

  Reference numeral 15 denotes a left and right traveling lever / pedal provided at the center of the front floor plate 12 which is the front side of the driver's seat 8. The travel lever / pedal 15 has a valve unit (not shown) mounted in the central mounting hole 12A.

  Reference numeral 16 denotes a reserve pedal that is located on the left side of the travel lever pedal 15 and is attached to the front floor plate 12. The spare pedal 16 is used to step on the hydraulic equipment when a hydraulic equipment (not shown) such as a breaker is added. The spare pedal 16 has a valve unit (not shown) mounted in the left mounting hole 12B.

  Further, 17 is a swing pedal that is located on the right side of the travel lever pedal 15 and is attached to the front floor plate 12. The swing pedal 17 is used to step on a swing cylinder (not shown) that swings the work device 4 in the left and right directions. The swing pedal 17 has a valve unit (not shown) mounted in the right mounting hole 12C.

  Reference numeral 18 denotes a cab provided above the revolving frame 6. The cab 18 is formed as a box body covering the periphery and the upper side of the driver's seat 8. Moreover, the circumference | surroundings of the cab 18 are opened largely and provide the operator with a wide view. Further, the cab 18 has a front portion attached to the front floor plates 12 and 14 of the floor 11 via an anti-vibration mount 20, and a rear portion attached to another anti-vibration mount ( (Not shown).

  Here, the anti-vibration mount 20 is attached to the front side portion of the cab 18. Therefore, a projecting plate portion 18A projecting inward is provided at the lower portion of the cab 18, and the projecting plate portion 18A has a mount mounting hole 18C in the vicinity of the left front pillar 18B and the right front pillar (not shown), respectively. (Only the front left pillar 18B side is shown in FIG. 6).

  Reference numeral 19 denotes an exterior cover provided on the upper swing body 3 so as to cover the periphery (see FIGS. 1 and 2). The exterior cover 19 includes a left front cover 19A, a right front cover 19B that covers the space between the revolving frame 6 and the floor 11, a left rear cover 19C that covers the left side of the engine, a right rear cover (not shown), an engine cover 19D, and the like. Has been.

  Next, the anti-vibration mount 20 disposed on the left front side among the anti-vibration mounts disposed at the four corners of the cab 18 in order to support the cab 18 with anti-vibration will be described. The anti-vibration mount disposed on the front right side is the same as the anti-vibration mount 20 on the left front side, and therefore, the same reference numerals are given and description thereof is omitted.

  Reference numeral 20 denotes an anti-vibration mount provided on the left front side of the floor 11. The vibration isolating mount 20 supports the cab 18 in a vibration isolating state with respect to the floor 11. Further, as shown in FIG. 6, the anti-vibration mount 20 includes a mounting base 21, a mounting bolt 22, a lower stopper 23, elastic members 24 and 25, a sleeve 26, an upper stopper 27, a fixing bolt 28 and the like which will be described later. ing.

  Reference numeral 21 denotes a mounting base serving as a mounting base for the vibration-proof mount 20. The mounting base 21 is detachably attached to the front floor plate 12 of the floor 11. The mounting base 21 can be attached to the floor 11 using mounting bolts 22 described later when the cab 18 is mounted on the floor 11 and can be removed from the floor 11 when mounting a canopy 30 described later.

  Specifically, the mounting base 21 is formed in, for example, a thick disk shape, and a central screw hole 21A into which the fixing bolt 28 is screwed is formed in a substantially central portion thereof. The mounting base 21 is formed with two outer screw holes 21B so as to sandwich the central screw hole 21A.

  Then, with the mounting base 21 placed on the left side on the front floor plate 12, the mounting bolts 22 are inserted into the respective bolt insertion holes 12D from the lower side, and the mounting bolts 22 are screwed into the outer screw holes 21B. Fasten. As a result, the mounting base 21 can be mounted on the front floor plate 12 so as to be removable.

  Here, since the mounting bolt 22 is inserted through the bolt insertion hole 12D having a larger diameter than the mounting bolt 22, when the mounting bolt 22 is loosened, the mounting bolt 22 and the bolt insertion hole 12D The mounting base 21 can be moved in the horizontal direction by the gap.

  Further, a short cylindrical lower stopper 23 is integrally fixed to the upper surface of the mounting base 21 using fixing means such as welding. The upper end portion of the lower stopper 23 is separated from the protruding plate portion 18A of the cab 18 at a predetermined interval. As a result, the lower stopper 23 abuts against the protruding plate portion 18A of the cab 18 when the lower elastic member 24, which will be described later, is to be greatly deformed, and prevents the lower elastic member 24 from being excessively deformed. ing.

  Reference numeral 24 denotes a lower elastic member provided between the mounting base 21 and the protruding plate portion 18A of the cab 18. The lower elastic member 24 is formed in a cylindrical shape using an elastic material such as rubber. Further, a stepped washer 24A is fixed to the upper portion of the lower elastic member 24, and the washer 24A positions the lower elastic member 24 in the mount mounting hole 18C of the cab 18 substantially coaxially.

  Reference numeral 25 denotes an upper elastic member provided on the upper side of the protruding plate portion 18 </ b> A of the cab 18. The upper elastic member 25 is paired with the lower elastic member 24 in the upward and downward directions with the protruding plate portion 18A interposed therebetween. The upper elastic member 25 is formed in a cylindrical shape using an elastic material such as rubber similarly to the lower elastic member 24, and a washer 25A is fixed to the lower portion thereof.

  A cylindrical sleeve 26 is inserted into the elastic members 24 and 25. The sleeve 26 sets a distance dimension between the mounting base 21 and an upper stopper 27 described later so that an appropriate initial pressure can be applied to the elastic members 24 and 25.

  Reference numeral 27 denotes an upper stopper disposed on the upper side of the upper elastic member 25. The lower end portion of the upper stopper 27 is separated from the protruding plate portion 18A of the cab 18 at a predetermined interval. Thus, the upper stopper 27 abuts against the protruding plate portion 18A of the cab 18 when the upper elastic member 25 is about to be largely deformed, thereby preventing the upper elastic member 25 from being excessively deformed.

  Reference numeral 28 denotes a fixing bolt for detachably mounting the cab 18 to the mounting base 21 on the floor 11 side. The fixing bolt 28 includes a lower elastic member 24 disposed between the mounting base 21 and the protruding plate portion 18A of the cab 18, and an upper elastic member 25 disposed on the protruding plate portion 18A. 25, the sleeve 26 is inserted into the sleeve 26, and the upper stopper 27 is disposed on the sleeve 26. Then, the sleeve 26 is inserted into the sleeve 26 and the like from above to be screwed into the central screw hole 21A of the mounting base 21. It fixes in the state assembled | attached so that a member might be piled up.

  Reference numeral 29 denotes a counterweight attached to the rear portion of the revolving frame 6. The counterweight 29 is in a weight balance with the work device 4 and is formed as a heavy object. Mounted portions 29A are provided on the upper portion of the counterweight 29 so as to be separated from each other to the left and right, and the rear side of the cab 18 is attached to each mount mounted portion 29A via a vibration-proof mount (not shown). Yes.

  Next, the case where the excavator 1 is changed to the canopy specification in which the canopy 30 is attached to the floor 11 or the like will be described. In the canopy-type hydraulic excavator 1, as shown in FIG. 7, by removing the mounting base 21 of the anti-vibration mount 20 from the floor 11, it can be used as it is as a common part without replacing the floor 11.

  In FIG. 8, reference numeral 30 denotes a canopy provided on the floor 11 instead of the cab 18. The canopy 30 is configured as a three-column canopy having a right front column 30A, a left rear column 30B, and a right rear column 30C, and covers the upper side of the driver's seat 8 with an upper roof 30D. Further, the canopy 30 has a front mounting portion 30 </ b> E extending leftward from the right front column 30 </ b> A and is mounted on each front floor plate 12, 14. On the other hand, the rear columns 30 </ b> B and 30 </ b> C of the canopy 30 are attached on the counterweight 29.

  Here, when the front mounting portion 30E of the canopy 30 is mounted on the front floor plates 12 and 14 of the floor 11, since the mounting position is close to the mounting base 21 of the anti-vibration mount 20, the front mounting portion 30E is left as it is. Will interfere with the mounting base 21. However, the front floor plates 12, 14 can be flattened by loosening the mounting bolts 22 and removing the mounting base 21. Thereby, the front side attachment part 30E of the canopy 30 can be easily attached on each front side floor plate 12,14.

  31 is a floor mat provided so as to cover the floor 11 (see FIG. 9). The floor mat 31 can improve the cushioning properties of the feet. Further, the floor mat 31 can cover the mounting holes 12A, 12B, 12C of the front floor plate 12 exposed in FIG. 8 as shown in FIG.

  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.

  The operator seated on the driver's seat 8 can move the lower traveling body 2 forward or backward to move to the work site by operating the front traveling lever / pedal 15. At the work site, by operating the operation levers 9 arranged on the left and right, the work device 4 can be moved up and down to perform excavation work of earth and sand.

  Next, an operation of replacing the cab 18 that is a characteristic part of the present embodiment with the canopy 30 will be described.

  First, the cab 18 is supported on the floor 11 in a vibration-proof state by a vibration-proof mount 20. From this state, the front covers 19A and 19B of the exterior cover 19 are removed, and the mounting bolts 22 that attach the mounting base 21 to the front floor plates 12 and 14 are loosened and removed. Further, a bolt (not shown) for attaching the rear side of the cab 18 to the counterweight 29 is also removed. As a result, the cab 18 is removed from the floor 11 and the like together with the vibration-proof mount 20.

  Thus, when the anti-vibration mount 20 is removed from the floor 11, as shown in FIG. 7, the mounting base 21 can also be removed together, so that the mounting base 21 is eliminated and the front floor plates 12 and 14 are moved over. It can be flat.

  Next, when the front floor plates 12 and 14 of the floor 11 are flattened, the front mounting portion 30E of the canopy 30 is bolted to the front floor plates 12 and 14, and the rear columns 30B and 30C are bolted to the counterweight 29. Stop. Thereafter, the front covers 19A and 19B are attached, and the floor mat 31 is laid on the floor 11 so as to hide the bolt insertion holes 12D and 14A.

  As described above, according to the present embodiment, the cab 18 is supported by the front floor plates 12 and 14 positioned on the front side of the floor 11 via the anti-vibration mount 20, and the mounting base of the anti-vibration mount 20 is attached. The mounting base 21 is configured to be detachably mounted to the front floor plates 12 and 14 using mounting bolts 22.

  Therefore, the mounting base 21 of the anti-vibration mount 20 can be easily mounted on the floor 11 by the mounting bolt 22. As a result, the cab 18 can be easily attached to the mounting base 21 together with the elastic members 24 and 25, the sleeve 26 and the like constituting the vibration-proof mount 20, and the assembling workability can be improved.

  On the other hand, when the mounting bolt 22 is loosened and the mounting base 21 of the anti-vibration mount 20 is removed from the floor 11, the mounting base 21 is excluded from the front floor plates 12, 14 to which the front mounting portion 30E of the canopy 30 is mounted. The canopy 30 can be easily mounted on the floor 11.

  As a result, even when the canopy 30 is installed instead of the cab 18, one floor 11 (the front floor plates 12, 14, etc.) can be attached to both the cab 18 and the canopy 30 by removing the mounting base 21 of the vibration isolation mount 20. It can be shared, and the change work from the cab 18 to the canopy 30 can be easily performed. Moreover, since the floor 11 can be made into one kind, productivity can be improved and manufacturing cost can be reduced.

  In addition, when neither the cab 18 nor the canopy 30 is attached to the floor 11, the floor 11 can be flattened by removing the mounting base 21, so that the foot does not get caught and looks Can also be good.

  Furthermore, the bolt insertion holes 12D and 14A of the front floor plates 12 and 14 through which the mounting bolts 22 of the anti-vibration mount 20 are inserted are formed as large diameter holes having a larger diameter than the mounting bolts 22. Therefore, when the cab 18 is mounted on the floor 11, even if the position of the mounting base 21 is shifted, the clearance between the mounting bolt 22 and the large-diameter bolt insertion holes 12D and 14A can be reduced by loosening the mounting bolt 22. Therefore, the position of the mounting base 21 can be adjusted, and the cab 18 can be arranged at an accurate position by a simple operation.

  In the embodiment, the mounting base 21 of the anti-vibration mount 20 is formed in a thick disk shape, and a central screw hole 21A is formed in a substantially central portion thereof, and two external screws are sandwiched therebetween. A hole 21B is formed. Then, the mounting base 21 is mounted on the front floor plate 12 by inserting the mounting bolts 22 from below into the respective bolt insertion holes 12D and screwing the mounting bolts 22 into the outer screw holes 21B. The case where it is configured to be detachably mounted on the front floor plate 12 has been described as an example.

  However, the present invention is not limited to this. For example, as in the first modification shown in FIG. 10, the front floor plate 41 includes a large-diameter pedestal through hole 41A and a plurality of, for example, Three or more bolt insertion holes 41B (only two are shown) are provided. On the other hand, the mounting base 43 of the anti-vibration mount 42 is formed in a covered cylindrical shape having a flange portion 43A on the lower side, a central screw hole 43C is formed in the center of the lid portion 43B, and a plurality of flange portions 43A are provided with a plurality of screw holes. Outer screw holes 43D (only two are shown) are formed. Then, the mounting base 43 according to the first modification is passed through the base through hole 41A of the front floor plate 41 from below, and the flange portion 43A is brought into contact with the periphery of the base through hole 41A. In this state, the mounting base 44 is detachably attached to the front floor plate 41 by inserting the mounting bolts 44 from above into the respective bolt insertion holes 41B and screwing the mounting bolts 44 into the outer screw holes 43D. Also good.

  Further, as in the second modification shown in FIG. 11, for example, the mounting base 52 of the anti-vibration mount 51 is formed with a large diameter, a central screw hole 52A is formed at the center thereof, and the bolts of the front floor plate 12 are inserted. Bolt insertion holes 52B are formed at positions corresponding to the holes 12D. And it is good also as a structure which attaches the attachment base 53 to the front side floor plate 12 so that attachment is possible by inserting the attachment volt | bolt 53 in each bolt penetration hole 52B, 12D, and fastening with the nut 54. FIG.

  On the other hand, in the embodiment, the case where the floor 11 is configured by, for example, three (three divisions) front floor plate 12, rear floor plate 13, and right front floor plate 14 is illustrated. However, the present invention is not limited to this, and the floor 11 may be formed by a single plate or may be divided into two or four or more (by two or four or more floor plates). .

  Further, in the embodiment, the case where the canopy 30 is configured as a three-column canopy having the right front column 30A, the left rear column 30B, and the right rear column 30C has been described as an example. However, the present invention is not limited to this. For example, a canopy having four columns and a canopy having five or more columns may be mounted on the floor 11.

  Further, in the embodiment, the hydraulic excavator 1 including the crawler type lower traveling body 2 is described as an example of the construction machine. However, the present invention is not limited to this, and may be applied to, for example, a hydraulic excavator provided with a wheel-type lower traveling body. Besides, it can be widely applied to other construction machines such as wheel loaders and lift trucks.

1 is a front view showing a hydraulic excavator according to an embodiment of the present invention. It is a top view which expands and shows the upper turning body which abbreviate | omitted the cab. It is an external appearance perspective view which expands and shows a turning frame and a part of floor. It is an external appearance perspective view which shows a floor support member and a front side floor plate. It is the perspective view of the principal part expansion which looked at the state which attached the left front part of the cab via the anti-vibration mount to the front side floor plate from the cab. FIG. 6 is a cross-sectional view of an anti-vibration mount and the like seen from the direction of arrows VI-VI in FIG. 5. It is a top view which shows the upper turning body which abbreviate | omitted the cab in the state which removed the mounting base. It is an external appearance perspective view which shows the upper revolving body which attached the canopy on the floor. It is an external appearance perspective view which shows the upper revolving body which attached the canopy and the floor mat on the floor. It is sectional drawing which looked at the anti-vibration mount etc. by the 1st modification of this invention from the same position as FIG. It is sectional drawing which looked at the anti-vibration mount etc. by the 2nd modification of this invention from the same position as FIG.

Explanation of symbols

1 Excavator (construction machine)
4 Working device 6 Turning frame 8 Driver's seat 10 Floor support member 11 Floor 12, 41 Front floor plate 12D, 41B, 52B Bolt insertion hole 13 Rear floor plate 14 Right front floor plate 18 Cab 20, 42, 51 Anti-vibration mount 21 , 43, 52 Mounting base 21A, 43C, 52A Central screw hole 21B, 43D Outer screw hole 22, 44, 53 Mounting bolt 24 Lower elastic member 25 Upper elastic member 28 Fixing bolt 30 Canopy 54 Nut

Claims (3)

A frame on which a working device is mounted on the front side without a support structure; a driver seat provided on the frame on which an operator is seated; a floor provided on the frame at a front foot of the driver seat; In a construction machine comprising an anti-vibration mount mounting base provided on the floor for anti-vibration support of the cab,
The construction machine according to claim 1, wherein the mounting base of the anti-vibration mount is configured to be detachably attached to the floor by using bolts.   The mounting base of the anti-vibration mount is attached to the floor using the bolt when the cab that covers the periphery and the upper side of the driver's seat is mounted on the floor, and is detached from the floor when the canopy that covers the upper side of the driver's seat is attached. The construction machine according to claim 1, which is configured.   The construction machine according to claim 1 or 2, wherein the bolt insertion hole through which the bolt is inserted is formed as a large-diameter hole having a diameter larger than that of the bolt in order to adjust a mounting position of the mounting base.

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