Construction machine

Abstract

To provide a construction machine equipped with a controller stand that allows an operator to easily operate the machine and easily get on and off the machine when using a portable controller.SOLUTION: A construction machine is provided with a driver's cab 16 with an entrance 26 at one side in a left-right width direction. The driver's cab is provided with a driver's seat 21, a controller that an operator uses to operate, and a controller stand 24 that detachably supports the controller. The controller stand has an arm 33 with a mounting portion 32 on which the controller is placed, and a support 34 that serves as a rotation axis for rotating the arm horizontally. The support is provided in a space without an entrance, of spaces obtained by dividing the driver's cab in two in the left-right width direction by a vertical plane S that passes through the center of the driver's seat. The mounting portion is configured to be movable between an approach position close to the driver's seat and a retracted position away from the driver's seat in accordance with the rotation of the arm.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a construction machine, and more particularly to a construction machine equipped with a driving operation device in a driver's cab. [Background technology]

[0002] BACKGROUND ART Construction machines such as pile drivers, earth drills, and cranes are provided with an operation device inside a cab in which an operator sits (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-3247 Summary of the Invention [Problem to be solved by the invention]

[0004] It may be convenient to be able to operate the various construction machines described above from a location away from the cab. In such cases, it may be possible to use a portable controller that can be operated from both inside and outside the cab. However, while portable controllers have short levers that make them easy to operate, when they are installed inside the cab, there is a problem that the operator's arms and other parts of the body are likely to come into contact with them when getting on and off the machine, which can hinder getting on and off.

[0005] Therefore, an object of the present invention is to provide a construction machine equipped with a controller stand that allows the operator to both easily operate the machine and easily get on and off when using a portable controller. [Means for solving the problem]

[0006] In order to achieve the above object, the construction machine of the present invention comprises a lower running body, an upper rotating body rotatably mounted on the upper part of the lower running body, a work device mounted on the front part of the upper rotating body, and a driver's cab mounted on the upper rotating body and having an access door on one side in the left-right width direction, wherein the driver's cab is provided with a driver's seat, a controller used by an operator to operate the machine, and a controller stand for detachably supporting the controller, the controller stand having an arm with a mounting portion for placing the controller, and a support pillar serving as a pivot axis for rotating the arm horizontally, the support pillar being provided in a space without an access door, of a space obtained by dividing the interior of the driver's cab into two in the left-right width direction by a vertical plane passing through the center of the driver's seat, and the mounting portion is configured to be movable between an approach position close to the driver's seat and a retracted position away from the driver's seat in accordance with the rotation of the arm.

[0007] The controller stand is also characterized by comprising an approach-side fixing means for fixing the mounting portion at the approach position and a retracted-side fixing means for fixing the mounting portion at the retracted position. The mounting portion is further characterized by having an adjustment portion for selectively mounting a wired controller or a wireless controller having different external shapes.

[0008] The cab is also characterized in that when the controller stand that supports one of the wired controller and the wireless controller is designated as a first controller stand, a second controller stand that detachably supports the other is provided independently of the first controller stand.

[0009] Furthermore, the device is characterized by comprising an approach detection means for detecting whether the placement section is in the approach position or not, a placement detection means for detecting whether the controller is placed on the placement section or not, and a control device for invalidating driving operation commands from the controller when the placement section is not in the approach position and the controller is placed on the placement section based on the detection results of the approach detection means and the placement detection means. [Effects of the Invention]

[0010] According to the construction machine of the present invention, the controller stand provided in the cab rotates an arm around a support pillar spaced apart from the boarding / alighting opening in the cab width direction as a pivot axis, so that the controller mounting section can be moved between a close position close to the driver's seat and a retracted position away from the driver's seat. This allows the operator to both easily operate the controller and get on and off when using a portable controller. In particular, in the retracted position, the controller is supported so that it generally faces the boarding / alighting opening, which simplifies the transport route for carrying the controller in and out, making it easy to get on and off while holding the controller. This allows for the realization of a construction machine equipped with a safe and easy-to-use controller stand. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a side view of a pile driver showing an example of a construction machine according to the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. 10 is an explanatory diagram showing the wireless controller installed in the driver's cab in use. [Figure 5] FIG. 10 is an explanatory diagram showing the wireless controller installed in the driver's cab in an unused state. [Figure 6] FIG. 10 is an explanatory diagram showing the state in which the wireless controller is used when taken outside the driver's cab. [Figure 7]FIG. [Figure 8] FIG. [Figure 9] FIG. 9 is a view taken along the line IX-IX in FIG. 7. [Figure 10] This is an oblique view of the first controller stand as seen from the rear right. [Figure 11] This is an oblique view of the first controller stand as seen from the left rear. [Figure 12] FIG. 10 is a side view showing the wired controller placed on the placement section of the first controller stand. [Figure 13] FIG. 10 is a side view showing the wireless controller placed on the placement section of the first controller stand. [Figure 14] This is an oblique view of the second controller stand from the rear right. [Figure 15] This is an oblique view of the second controller stand, seen from the left rear. [Figure 16] FIG. 10 is a side view showing the state in which the wired controller is placed on the placement section of the second controller stand. [Figure 17] FIG. 10 is a side view showing the wireless controller placed on the placement section of the second controller stand. [Figure 18] FIG. 10 is a perspective view showing the vicinity of the mounting portion in the approach position. [Figure 19] 10 is a diagram illustrating the operation of the approach side fixing means. FIG. [Figure 20] FIG. 10 is a perspective view showing the vicinity of the mounting section in the retracted position. [Figure 21] 10 is an explanatory view of the operation of the retraction-side fixing means. FIG. [Figure 22] FIG. 10 is a schematic configuration diagram of a system according to a modified example. DETAILED DESCRIPTION OF THE INVENTION

[0012] 1 to 22 show an example of an application of the present invention to a pile driver, which is an example of construction machinery. As shown in FIG. 1, the pile driver 11 has a rotatable upper rotating body 13 mounted on a crawler-equipped lower traveling body 12. A pile driving device, such as a leader 14 and a rotary drive unit 15 that moves up and down along the front of the leader 14, is mounted at the center of the front of the upper rotating body 13. A driver's cabin (cab) 16 with an access door 16a that opens and closes is mounted on the right side of the upper rotating body 13, and an engine room that houses an engine and a hydraulic pump is mounted on the left side of the upper rotating body 13. Stabilizing jacks 17 are mounted at four locations on the front, rear, left, and right sides of the upper rotating body 13, and a counterweight 18 is mounted at the rear end of the upper rotating body 13 to balance the machine.

[0013] When the pile driver 11 is used for the purpose of burying steel pipe piles, steel pipe piles are used as the construction members. The steel pipe piles (not shown) are connected via a cap rod 20 attached to the lower end of a drive rod 19, and are pressed into the ground by lowering the rotary drive device 15 while rotating the drive rod 19. Depending on the construction conditions, the rotary drive device 15 is replaced with a larger device capable of driving large-diameter piles.

[0014] 2 to 6, in order to perform various pile construction methods, a driver's seat 21 with a mechanism for adjusting its position in the fore-and-aft direction, a wired controller 22 (FIGS. 2 and 3) and a wireless controller 23 (FIGS. 4 to 6) for the operator to operate the machine, and a first controller stand 24 and a second controller stand 25 for detachably supporting the controllers 22, 23, respectively, are provided inside the box-shaped driver's cab 16. In addition, control devices such as a side stand 27 and a box 28 are provided on the floor inside the driver's cab 16 in positions that do not obstruct entry and exit through the boarding / exiting door 26.

[0015] Each controller 22, 23 is an operation device capable of operating a lever or the like to operate the machine, and when one is in use and installed on the first controller stand 24, the other is in use and installed on the second controller stand 25. In use, the controller 22, 23 to be operated can be taken outside the operator's cab 16 for the purpose of remotely operating the pile driver 11. In this embodiment, the wireless controller 23 is used as standard, and the wired controller 22 is used as a backup (alternative) in an environment where wireless communication is not possible.

[0016] 2 and 3, the wired controller 22 has various levers, switches, guard members (handling members) 22b, etc., provided on the top surface of a flat rectangular parallelepiped housing 22a (see also FIG. 12), and is connected to a control device incorporated in, for example, a side stand 27 using a communication cable 29 (FIG. 2). Furthermore, when the cable connection with the relay box 30 provided on the floor is released and the wired controller 22 is taken outside the cab 16, an electrical connection with the control device is ensured via a cable connection port 31 provided in the front part of the cab 16 (FIG. 3).

[0017] The wireless controller 23 is equipped with a wireless communication module capable of short-range communication with a control device. As shown in Figures 4 to 6, the housing 23a is formed slightly smaller in front-to-back and left-to-right dimensions than the housing 22a of the wired controller 22, but is formed slightly larger in height. In addition, various levers, switches, guard members (handling members) 23b, monitor device 23c, etc. are provided on the top surface of the housing 23a, and a rounded shape 23d is provided on the bottom surface of the housing 23a in the front-to-back direction (see also Figure 13).

[0018] Here, when the wireless controller 23 installed in the cab 16 is in use, it faces the operator seated in the cab 21 as shown in FIG. 4(a), and is located within reach of both hands of the operator as shown in FIG. 4(b). When not in use, it is retracted to a position that does not interfere with the operator's entry and exit as shown in FIG. 5(a), and as shown in FIG. 5(b), it ensures a wide space (entrance and exit route) between the cab 21 and the boarding / exiting door 26. When the wireless controller 23 is taken outside the cab 16 and used, it is placed, for example, around the operator's shoulder or neck as shown in FIG. 6, in a position that allows operation in a comfortable position. Although the wired controller 22 is less portable than a wireless controller, when installed in the cab 16, it provides a similar usability to a wireless controller (FIG. 2).

[0019] The specific configurations of first controller stand 24 and second controller stand 25 will be described below with reference to Figures 7 to 21. As shown in Figures 7 to 13, first controller stand 24 is generally configured to have an arm 33 equipped with mounting section 32 for selectively placing wired controller 22 or wireless controller 23, and a support column 34 that serves as a rotation axis for rotating arm 33 horizontally.

[0020] As shown in Fig. 7 and other figures, the support pillar 34 has a circular cross-section shaft (axis) 34b inserted into a circular cross-section cylindrical body 34a and is provided in a space without the boarding / alighting door 26 and in front of the side stand 27, within a space obtained by dividing the interior of the driver's cab 16 into two in the left-right width direction (the up-down direction in Fig. 8) by a vertical plane S passing through the center of the driver's seat 21. In other words, the support pillar 34 is provided in a back space separated from the boarding / alighting door 26 in the width direction of the driver's cab.

[0021] 7 to 9, the arm 33 is mainly made of a round pipe material and has a linear base end 33b connected to the shaft 34b by a flange 33a, a curved intermediate bent portion 33c that changes the orientation of the pipe end from the base end 33b from vertical to horizontal, and a linear tip end 33d that extends horizontally from the pipe end of the intermediate bent portion 33c. As shown in Fig. 8, the connection between the intermediate bent portion 33c and the tip end 33d is bent in a V-shape at a position that overlaps with the front corner 21a of the driver's seat 21 in a plan view. In this overlapping state, the tip end 33d is positioned to extend in the left-right width direction of the driver's cab 16 and holds the placement portion 32 in a position that is symmetrical with respect to the vertical plane S as the neutral plane. As a result, the placement unit 32 can move between an approach position (solid line in FIG. 8) close to the driver's seat 21 and a retracted position (imaginary line in FIG. 8) away from the driver's seat 21 in accordance with the rotation of the arm 33. In this case, the rotation angle of the arm 33 is set to, for example, approximately 75 degrees.

[0022] 10 and 11, the mounting section 32 is generally configured to include a pair of left and right U-shaped plate-like vertical members 35, 35 arranged facing each other with a gap between them and having their base ends joined to the tip end 33d of the arm 33, an L-shaped bent plate-like horizontal member 36 spanning between the tips of the vertical members 35, 35, and an adjustment section 37 for selectively placing the wired controller 22 and the wireless controller 23 on them, and as shown in Fig. 12, the tip end (horizontal member 36) of the vertical member 35 is cantilevered from the tip end 33d of the arm 33 in an inclined state where it is higher than the base end. As a result, the upper surface (plate surface) of the horizontal member 36 is held in a state inclined at a predetermined angle θ1 (for example, 25 degrees) with respect to the horizontal.

[0023] The vertical member 35 takes into consideration the difference in outer dimensions between the wired controller 22 and the wireless controller 23. That is, taking into consideration that the wireless controller 23 has smaller vertical and horizontal dimensions than the wired controller 22, the inner edge of the U-shape is formed to follow the outer shape (rounded shape 23d, etc.) of the housing 23a of the wireless controller 23. As a result, when the wired controller 22 is placed on top of the vertical member 35, a space is formed where the bottom surface of the housing 22a and the lower inner edge 35a of the U-shape (a portion with a shock-absorbing trim) are spaced apart in the vertical direction ( FIG. 12 ). On the other hand, when the wireless controller 23 is placed on the lower inner edge 35a of the U-shape, the housing 23a is submerged in this space ( FIG. 13 ).

[0024] The adjustment section 37 has a fixed plate 38 fixed to the tip 33d of the arm 33, and a movable plate 39 screwed to the cross member 36 with a butterfly bolt 40 that can be turned by hand, and is configured so that the movable plate 39 can slide along the top surface of the cross member 36 in a direction toward the fixed plate 38 (in the direction of arrow A in Figure 12) and a direction away from it (in the direction of arrow B in Figure 12) by means of an elongated bolt hole 39d provided in the movable plate 39.

[0025] Fixed plate 38 and movable plate 39 are provided with a plurality of plate surface portions formed by bending or attaching flat plates. Specifically, seating surfaces (portions with rubber plates) 38a, 39a on which housing 22a of wired controller 22 is placed, rising surfaces (portions with rubber plates) 38b, 39b that rise at right angles to seating surfaces 38a, 39a and face each other to sandwich housing 22a of wired controller 22, and falling surfaces (portions with rubber plates) 38c, 39c that rise at right angles to seating surfaces 38a, 39a and face each other to sandwich housing 23a of wireless controller 23, and the cross section is formed in a Z shape.

[0026] When the adjustment unit 37 is adapted to be compatible with the wired controller 22, as shown in FIG. 12 , the position of the movable plate 39 is adjusted with respect to the housing 22a on the seats 38a, 39a, so that the distance between the rising surfaces 38b, 39b matches the front-to-back width of the housing 22a, and the butterfly bolt 40 is tightened while the front and back surfaces of the housing 22a are pressed against each other and held together. This allows the wired controller 22 to be stably placed on the mounting portion 32. On the other hand, when the adjustment unit 37 is adapted to be compatible with the wireless controller 23, as shown in FIG. 13 , the position of the movable plate 39 is adjusted with respect to the housing 23a on the lower inner edge 35a, so that the distance between the falling surfaces 38c, 39c matches the front-to-back width of the housing 23a, and the butterfly bolt 40 is tightened while the front and back surfaces of the housing 23a are pressed against each other and held together. This allows the wireless controller 23 to be stably placed on the mounting portion 32.

[0027] As shown in Figures 14 to 17, the second controller stand 25 is generally configured to have an arm 42 equipped with a mounting portion 41 (component parts are given the same symbols) having the same structure as the mounting portion 32 of the first controller stand 24, and a base member 43 that fixes the arm 42 horizontally.

[0028] The base member 43 is formed by combining pipe materials and the like, and is provided in the back space inside the cab 16, on the front side of the support pillar 34 of the first controller stand 24, as shown in Fig. 8. The base member 43 specifically comprises an upper horizontal portion 43a extending in the front-to-rear direction, a pair of front and rear support pillars 43b, 43b provided on both ends of the upper horizontal portion 43a, and a lower horizontal portion 43c spanning between the pair of front and rear support pillars 43b, 43b.

[0029] 7, the upper end of the upper horizontal portion 43a is disposed at the same height as the lower end of the mounting portion 32 of the first controller stand 24. On the other hand, the lower horizontal portion 43c is disposed at a height close to the floor, and cables are bundled together using, for example, a cable tie. The arm 42 is connected to a pair of front and rear support portions 43b, 43b at its rear end by flanges 42a and at its front end by brackets 44 that traverse the interior of the cab 16 in the left-right width direction.

[0030] The mounting portion 41 is cantilevered from the middle of the arm 42 in the longitudinal direction and is inclined more sharply than the mounting portion 32 of the first controller stand 24. As shown in FIGS. 16 and 17, the upper surface (plate surface) of the cross member 36 is inclined at a predetermined angle θ2 (e.g., 65 degrees) with respect to the horizontal. In this state, the upper end of the mounting portion 41 is disposed at the same height as the lower end of the upper horizontal portion 43a, as shown in FIG. 7. As a result, the mounting portion 32 of the first controller stand 24 and the mounting portion 41 of the second controller stand 25 are disposed at a certain distance in the vertical direction. Although not shown, for example, even when one of the controllers 22, 23 is placed on the mounting portion 41 of the second controller stand 25, a clearance sufficient to prevent contact between the mounting portion 41 and the mounting portion 32 of the first controller stand 24 that has moved to the retracted position is ensured.

[0031] Here, the movable first controller stand 24 is provided with an approach side fixing means 45 that fixes the mounting portion 32 to an approach position (solid line in Figure 8) and an evacuation side fixing means 46 that fixes it to a retracted position (imaginary line in Figure 8) for the sake of safety and convenience of operation.

[0032] 18 and 19, the approach-side fixing means 45 includes a bracket 47 extending diagonally forward and to the right from one side surface (right side surface) of the right-hand side of the pair of left and right vertical members 35, 35 that make up the mounting section 32, and a crescent receiver 48 is attached to the tip of this bracket 47. Meanwhile, a crescent lock 50 is attached via a base plate 49 to the upper rear surface of the box (control device) 28. The crescent lock 50 has a mounting seat 50a, a crescent 50c that rotates around a crescent shaft 50b to engage with and disengage from the crescent receiver 48, and an operating lever 50d for operating the crescent 50c.

[0033] When the mounting portion 32 is in the approach position (FIG. 18), the abutment plate portion 47a (see also FIG. 10) provided at the tip of the bracket 47 abuts against the front surface of the base plate 49 (the plate surface opposite the attachment side of the crescent lock 50), and the positions of the crescent receiver 48 and the crescent lock 50 are aligned. In this aligned state, when the operating lever 50d is operated to rotate the crescent 50c within a range of approximately 180 degrees, the crescent 50c engages with and disengages from the crescent receiver 48.

[0034] That is, when the operating lever 50d is extended downward, the crescent 50c is released from the crescent receiver 48, and the crescent lock 50 is in an unlocked state, as shown in Figure 19(a). On the other hand, when the operating lever 50d is rotated in this unlocked state so that it extends upward, the crescent 50c engages with the crescent receiver 48, and the crescent lock 50 is in a locked state, as shown in Figure 19(b). In this locked state, the mounting portion 32 is fixed in the close position, and the various controllers 22, 23 placed on the mounting portion 32 can be stably held in a usable state (see also Figure 4).

[0035] 20 and 21, the retraction-side fixing means 46 is provided with a bracket 51 extending forward from one side surface (left side surface) of the left side of the pair of left and right vertical members 35, 35 that make up the mounting portion 32, and a crescent receiver 48 is attached to the tip of this bracket 51. Meanwhile, a crescent lock 50 is attached to the upper horizontal portion 43a of the base member 43 via a base plate 52. The crescent lock 50 and the crescent receiver 48 have the same configuration as those of the approach-side fixing means 45.

[0036] When the mounting portion 32 is in the retracted position (FIG. 20), the abutment plate portion 51a (see also FIG. 11) provided at the tip of the bracket 51 abuts against the right side surface of the base plate 52 (the plate surface opposite the attachment side of the crescent lock 50), and the positions of the crescent receiver 48 and the crescent lock 50 are aligned. In this aligned state, when the operating lever 50d is operated to rotate the crescent 50c within a range of approximately 180 degrees, the crescent 50c engages with and disengages from the crescent receiver 48.

[0037] That is, when the operating lever 50d is extended downward, the crescent 50c is released from the crescent receiver 48, and the crescent lock 50 is in an unlocked state, as shown in Figure 21(a). On the other hand, when the operating lever 50d is rotated in this unlocked state so that it extends upward, the crescent 50c engages with the crescent receiver 48, and the crescent lock 50 is in a locked state, as shown in Figure 21(b). In this locked state, the mounting portion 32 is fixed in the retracted position, and the various controllers 22, 23 placed on the mounting portion 32 can be stably held in an unused state (see also Figure 5).

[0038] As described above, according to the construction machine of the present invention, the controller stand 24 provided in the cab 16 is configured to rotate the arm 33 about the support column 34, which is spaced apart from the boarding / alighting opening 26 in the cab width direction, as a rotation axis, so that the mounting portion 32 for the controllers 22, 23 can be moved between a close position close to the driver's seat 21 and a retracted position away from the driver's seat 21. This allows the operator to both easily operate the controllers 22, 23 and easily get on and off the machine when using portable controllers 22, 23. In particular, in the retracted position, the controllers 22, 23 are supported so that they generally face the boarding / alighting opening 26. As a result, the transport route for bringing in and out the controllers 22, 23 is simplified, allowing the operator to easily get on and off the machine while holding the controllers 22, 23. This makes it possible to realize a construction machine equipped with a controller stand 24 that is safe and easy to use.

[0039] Furthermore, because the controller stand 24 is equipped with approach-side fixing means 45 that fixes the mounting portion 32 to the approach position and retract-side fixing means 46 that fixes it to the retracted position, it is possible to prevent the controllers 22, 23 from moving unexpectedly at each operation stage of the construction machine (construction, transportation, etc.). Furthermore, because the mounting portions 32, 41 of the controller stands 24, 25 have adjustment units 37 for selectively mounting the wired controller 22 and the wireless controller 23, which have different shapes, the portable controllers 22, 23 can be widely applied in the various environments in which construction machines are used.

[0040] In addition, when the controller stand that supports either the wired controller 22 or the wireless controller 23 is designated as the first controller stand 24, the second controller stand 25 that supports the other is provided independently of the first controller stand 24. This, combined with the configuration of the adjustment section 37 that allows the controller stands 24, 25 to be shared, allows each of the controller stands 24, 25 that are installed simultaneously in the driver's cab 16 to be lightweight and compact.

[0041] 22 shows a modified example of the construction machine of the present invention. In the following description, the same components as those shown in the above embodiment are given the same reference numerals, and detailed description thereof will be omitted.

[0042] This modified example has the same configuration as the above embodiment, but is newly equipped with an approach detection means 53 that detects whether the mounting portion 32 is in the approach position, and a placement detection means 54 that detects whether one of the wired controller 22 and the wireless controller 23 is placed on the mounting portion 32. The control device 55 executes an additionally incorporated control program, and based on the detection results of the approach detection means 53 and the placement detection means 54, disables the operation command from the controllers 22, 23 (for example, does not issue a drive command to the control valve 56) when the mounting portion 32 is not in the approach position and one of the controllers 22, 23 is placed on the mounting portion 32.

[0043] The detecting means 53, 54 are each a known detector (such as a limit switch), and are provided on the mounting portion 32, the arm 33, or the like. In this modified example configured as described above, when neither the wired controller 22 nor the wireless controller 23 is placed on the mounting portion 32, one of the controllers 22, 23 is taken out (in use), and the control device 55 receives an operation command to drive the control valve 56. On the other hand, when one of the controllers 22, 23 is placed on the mounting portion 32 but the mounting portion 32 is not in the approach position, the operator cannot ensure a stable driving posture, and the control device 55 does not drive the control valve 56 even when it receives an operation command. In other words, because operation in an unstable posture within the cab 16 is restricted, safety when using the portable controllers 22, 23 can be further improved.

[0044] The present invention is not limited to the above-described embodiments, and the configuration of each part of the controller stand can be modified as appropriate depending on the size and shape of the space in the cab and the layout of the equipment. In the embodiments, two controller stands, a first and a second, are installed. However, only a movable first controller stand may be installed, and the controller specifications are also arbitrary. Furthermore, the approach-side fixing means and the retreat-side fixing means may be configured in a manner other than a crescent lock, such as by replacing a pin to fix the position. In addition, various sensors and switches can be used for the approach detection means and placement detection means that constitute the safety system, and the control program can also be arbitrary. While a pile driver has been described as an example of a construction machine, the present invention is not limited to this, and can be applied to various construction machines, such as earth drills and cranes, that have a cab mounted on a rotating upper body. [Explanation of symbols]

[0045] 11...pile driver, 12...lower running body, 13...upper rotating body, 14...leader, 15...rotation drive device, 16...operator's cab, 16a...door, 17...jack, 18...counterweight, 19...drive rod, 20...cap rod, 21...operator's seat, 21a...front corner portion, 22...wired controller, 22a...casing, 22b...guard member, 23...wireless controller, 23a...casing, 23b...guard member, 23c...monitor device, 23d...rounded shape, 24...first controller stand, 25...second controller stand, 26...boarding / exiting door, 27...side stand, 28...box, 29...communication cable, 30...relay box, 31...cable connection port, 32...mounting portion, 33...arm, 33a...flange, 33b...base end portion, 33c...intermediate bent portion, 33d...tip portion, 34...support, 34a...cylindrical body, 34b...shaft Foot, 35...vertical member, 35a...lower inner edge, 36...horizontal member, 37...adjustment portion, 38...fixed plate, 38a...seat surface, 38b...rising surface, 38c...falling surface, 39...movable plate, 39a...seat surface, 39b...rising surface, 39c...falling surface, 39d...bolt hole, 40...wing bolt, 41...placement portion, 42...arm, 42a...flange, 43...base member, 43a...upper horizontal portion, 43b...support portion, 43c...lower horizontal portion, 44...bracket Racket, 45...approaching side fixing means, 46...retracting side fixing means, 47...bracket, 47a...contact plate portion, 48...crescent receiver, 49...base plate, 50...crescent lock, 50a...mounting seat, 50b...crescent shaft, 50c...crescent, 50d...operating lever, 51...bracket, 51a...contact plate portion, 52...base plate, 53...approach detecting means, 54...placement detecting means, 55...control device, 56...control valve

Claims

1. a lower running body; an upper rotating body rotatably provided on an upper part of the lower traveling body; a working device provided at the front of the upper rotating body; A cab mounted on the upper rotating body and having an entrance / exit on one side in the left-right width direction; In a construction machine equipped with The operator's cab includes: The driver's seat and A controller that an operator operates; a controller stand that detachably supports the controller; is established, The controller stand includes: an arm having a mounting portion on which the controller is placed; a support pillar serving as a rotation axis for rotating the arm in a horizontal direction; and The support pillar is provided in a space in which the boarding / alighting door is not present, among spaces obtained by dividing the interior of the driver's cab into two in the left and right width direction by a vertical plane passing through the center of the driver's seat, The construction machine is characterized in that the mounting section is configured to be movable between an approach position close to the driver's seat and a retracted position away from the driver's seat in accordance with the rotation of the arm.

2. 2. A construction machine according to claim 1, wherein the controller stand comprises an approach-side fixing means for fixing the mounting portion at the approach position, and an evacuation-side fixing means for fixing the mounting portion at the evacuation position.

3. 3. A construction machine according to claim 1, wherein the mounting portion has an adjustment portion for selectively mounting a wired controller and a wireless controller having different external shapes.

4. 4. The construction machine according to claim 3, characterized in that, when the controller stand supporting one of the wired controller and the wireless controller is designated as a first controller stand, the operator's cab is provided with a second controller stand that detachably supports the other controller, which is provided independently of the first controller stand.

5. an approach detection means for detecting whether the placement unit is at the approach position; a placement detection means for detecting whether the controller is placed on the placement section; a control device that invalidates a driving operation command from the controller when the placement unit is not at the approach position and the controller is placed on the placement unit based on detection results from the approach detection means and the placement detection means; 2. The construction machine according to claim 1, further comprising:

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