JP2017048574A - Water sprinkling attachment, work machine, and water sprinkling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water sprinkling attachment that may be replaced readily with another attachment and enables water sprinkling at an even higher place.SOLUTION: A water sprinkling attachment 106 is connected to a tip of an arm 105 of a multi-joint type work device 103 that includes a boom 104, the arm 105 and an attachment, to replace the attachment. The water sprinkling attachment includes a connection part 10 connected at the tip of the arm 105, an expansion part 20 extending from the connection part 10, a water sprinkling nozzle 35 fitted at a tip of the expansion part 20, a hose 40 connected to the water sprinkling nozzle 35, and a hose reel 50 winding the hose 40. The expansion part 20 includes a telescopic mechanism part 21 comprising a plurality of cylindrical members 21a to 21e, and a plurality of cylinders 26a to 26c fixed on each of the corresponding cylindrical members of the telescopic mechanism part 21 and expanding/contracting the telescopic mechanism part 21.SELECTED DRAWING: Figure 10

Description

  The present invention relates to a watering attachment, work machine, and watering system for attaching and detaching water to a work machine such as a hydraulic excavator.

  There is one in which an attachment provided with a watering device is attached to a boom of a working machine such as a hydraulic excavator (see Patent Document 1).

JP-A-9-1087

  Conventionally, it has been common to manually spray water to prevent dust from being scattered at the site of demolition of buildings such as buildings. The need has arisen. Therefore, work machines equipped with a watering device have been proposed, but operating a dedicated watering machine at a narrow work site, such as a dismantling site in an urban area, constrains the work space and makes it cumbersome to carry in and out the machine. Is not reasonable. Therefore, it is desirable to remove the watering attachment after the watering operation so that another operation can be performed.

  However, in the configuration in which the attachment for watering is connected to the tip of the boom as in the work machine of Patent Document 1, when the work machine is used for another purpose after the watering work, the attachment for watering is first removed and the arm is attached. In this case, another attachment must be connected to the tip of the arm. In this case, unlike a normal attachment exchanging operation, an arm is required to be attached and detached, and a number of troublesome operations such as an attachment cylinder piping connection operation are involved, which requires a great number of man-hours. Further, since the arm is not configured to be attached / detached, heavy equipment such as a crane is required for the attachment / detachment.

  In addition, the attachment of Patent Document 1 is configured such that a member provided with a water spray device is slid by a single cylinder with respect to a member connected to the boom, and the water spray position is raised accordingly. However, the movement of the sprinkling position is limited by the stroke of the cylinder, and it is not possible to sprinkle high places.

  An object of the present invention is to provide a watering attachment, a work machine, and a watering system that can be easily exchanged with other attachments and can spray water at a higher place.

  In order to achieve the above object, a watering attachment according to the present invention includes a boom connected to a vehicle body of a work machine, an arm connected to the tip of the boom, and an attachment connected to the tip of the arm. The device is connected to the tip of the arm instead of the attachment, and is connected to the tip of the arm, a telescopic portion extending from the joint, and a tip of the telescopic portion. An attached watering nozzle, a hose connected to the watering nozzle, a hose reel provided on the connecting part or the expansion / contraction part, having a rotatable coupling connected to the hose and winding the hose; The telescopic part is fixed to a telescopic mechanism part composed of a plurality of cylindrical members and a corresponding cylindrical member of the telescopic mechanism part, respectively. , Characterized in that a plurality of cylinders extending and retracting the telescopic mechanism.

  According to the present invention, it can be easily exchanged with another attachment, and water can be sprinkled to a higher place.

It is a figure showing the watering system using the watering attachment which concerns on one Embodiment of this invention. It is a side view of the working machine shown in FIG. It is a side view showing the state which removed the watering attachment of the working machine shown in FIG. It is a left view of the watering attachment which concerns on one Embodiment of this invention. It is a top view of the watering attachment concerning one embodiment of the present invention. It is a right view of the watering attachment which concerns on one Embodiment of this invention. It is a schematic diagram showing the internal structure of the telescopic mechanism part which comprises the watering attachment which concerns on one Embodiment of this invention, and is a figure showing the most contracted state. It is the figure which extracted and represented the principal part of the circuit diagram of the watering system shown in FIG. It is a schematic diagram showing the internal structure of the telescopic mechanism part which comprises the watering attachment which concerns on one Embodiment of this invention, and is a figure showing the most extended state. It is a figure showing the state which extended the watering attachment of the working machine shown in FIG. It is the figure which illustrated two or more general attachments for work attached / detached with the working device of a working machine.

  Embodiments of the present invention will be described below with reference to the drawings.

1. Sprinkling system FIG. 1 is a diagram showing a watering system using a watering attachment according to an embodiment of the present invention. The watering system shown in this figure includes a work machine 100, a water tank 151, a pump 152, and a water supply pipe 153. The suction port (not shown) of the pump 152 and the water tank 151 are connected by a pipe 154, and the discharge port (not shown) of the pump 152 and the coupling of the watering attachment 106 attached to the work machine 100 (FIG. 5 and the like). Are connected by a water supply pipe 153. As a result, when the water in the water tank 151 is sucked and discharged by the pump 152, the water supplied through the water supply pipe 153 is jetted out from the watering attachment 106.

2. Work machine 100
FIG. 2 is a side view of the work machine 100, and FIG. 3 is a side view of the work machine with the watering attachment removed. When there is no notice in the following description, the front of the driver's seat (the left direction in FIGS. 2 and 3) is the front of the aircraft. The work machine shown in FIGS. 2 and 3 has a hydraulic excavator as a base machine, and is equipped with a watering attachment 106 according to the present invention instead of a bucket or the like as a work attachment to a work device 103 (described later). .

  The work machine 100 includes a vehicle body 113 and a work device (front work machine) 103 attached to the vehicle body 113.

  The vehicle body 113 includes a traveling body 101 and a revolving body 102. The swivel body 102 includes a cab 110, and a seat (not shown) on which an operator is seated and an operating device operated by the operator are arranged in the cab 110. The turning body 102 is provided on the traveling body 101 via a turning wheel (not shown), and turns with respect to the traveling body 101 by driving the turning wheel (not shown) with a turning motor (not shown). To do. The traveling body 101 is a crawler type that travels by the left and right crawler belts 117, but may be a wheel type. The crawler belt 117 of the traveling body 101 is driven by left and right traveling motors 118. The travel motor 118 and the turning motor are both hydraulic motors, but an electric motor may be used.

  The work device 103 is an articulated work device including a boom 104, an arm 105, a watering attachment 106, a boom cylinder 107, an arm cylinder 108, and an attachment cylinder 109. The boom 104 is connected to the front portion of the revolving body 102 so as to be rotatable in the vertical direction, the arm 105 is connected to the tip of the boom 104, and the watering attachment 106 is connected to the tip of the arm 105 so as to be rotatable. . The boom cylinder 107 is connected to the swing body 102 and the boom 104, and the arm cylinder 108 is connected to the boom 104 and the arm 105 at both ends. The attachment cylinder 109 has a base end connected to the base side of the arm 105 and a tip connected to the tip of the arm 105 and the watering attachment 106 via links 111 and 112, respectively. The boom cylinder 107, the arm cylinder 108, and the attachment cylinder 109 are all hydraulic cylinders, but an electric cylinder may be used. In the present embodiment, for example, an angle sensor 116 that detects an angle of the watering attachment 106 (specifically, a relative angle between the first link 111 and the arm 7) is connected to the connecting portion between the first link 111 and the arm 105. FIG. 8) is provided. The signal from the angle sensor 116 is output to the control device 60 (FIG. 8).

3. Watering Attachment FIG. 4 is a left side view of a watering attachment according to an embodiment of the present invention, FIG. 5 is a plan view, and FIG. 6 is a right side view. The watering attachment 106 shown in FIGS. 4-6 is provided with the connection part 10, the expansion-contraction part 20, the watering nozzle 35, the hose 40, and the hose reel 50. FIG.

  The connecting portion 10 is a bracket that is connected to the tip of the arm 105. The connecting part 10 has one side (left side in FIG. 4) connected to the expansion / contraction part 20 via pins 11 and 12, and the other side (right side in FIG. 4) has pin holes 13 and 14. Yes. When attaching the watering attachment 106 to the arm 105, the pin hole 13 is connected to the tip of the arm 105 by a pin 114 (FIG. 2), and the pin hole 14 is connected to the tip of the link 112 (FIG. 2) and the pin 115 (FIG. 2). Connected.

  The telescopic part 20 is a part extending from the connecting part 10 and includes a telescopic mechanism part 21 and a link 22. The telescopic mechanism portion 21 is a multistage expansion / contraction mechanism including a plurality of cylindrical members 21a-21e, and is connected to the connecting portion 10 by the pin 11 described above. The link 22 is a rod-shaped member, one end of which is connected to the bracket 23 provided on the tubular member 21e on the most base side of the telescopic mechanism portion 21 by the pin 24, and the other end is connected to the connecting portion 10 by the pin 12 described above. ing. A stand 25 is pivotally connected to the bracket 23 by the pin 24, and when the watering attachment 106 is placed on the ground or a loading platform, the stand 25 is placed in a substantially vertical posture with respect to the telescopic mechanism 21 as shown in FIG. Thus, the watering attachment 106 is supported by the stand 25. When not in use, the stand 25 is kept in a posture along the link 22 (see a two-dot chain line in FIG. 6). Details of the telescopic mechanism 21 will be described later.

  The watering nozzle 35 is in a posture in which the injection hole is directed in a direction perpendicular to the telescopic mechanism portion 21 in the cylindrical member 21a located at the distal end of the telescopic portion 20, specifically, the distal end of the telescopic mechanism portion 21. It is attached (so that the spray hole faces forward with the water spray nozzle 106 standing upward). Hereinafter, the surface facing forward in the standing posture is referred to as “abdominal side surface” of the watering nozzle 106, and the surface facing backward is referred to as “back side surface”. The tip (exit) of the hose 40 is connected to the watering nozzle 35. The hose 40 includes guide rollers 41-43 provided at the distal end portions of the abdominal side surfaces of the cylindrical members 21b-21d, guide rollers 44, 45 provided at the distal end portions of the abdominal side surfaces of the cylindrical member 21e and intermediate portions in the longitudinal direction. It is supported by. The guide rollers 41-43 support the lower side of the hose 40 when the telescopic mechanism portion 21 is in a lying posture as shown in FIG. The guide rollers 44 and 45 sandwich the hose 40 from the top and bottom and from the left and right in the same posture. The guide roller 45 is offset to the right side of the machine relative to the other guide rollers 41-44.

  The hose reel 50 includes a bobbin type take-up reel 51 that takes up the hose 40 and a support member 52 that connects and supports the take-up reel 51 to the connecting portion 10. Although the case where the hose reel 50 is attached to the connecting portion 10 is illustrated in the present embodiment, the hose reel 50 may be attached to the extendable portion 20 (for example, the cylindrical member 21e of the telescopic mechanism portion 21). The take-up reel 51 is rotatably supported by a support member 52 via a rotary shaft 53 and is biased by a spring in one direction of rotation (direction in which the hose 40 is wound), although not particularly shown. ing. A rotatable coupling 53 (FIGS. 5 and 6) having a watertight structure is supported on the rotating shaft 53. The coupling 54 is wound around the tip (outlet) of the water supply pipe 153 and the take-up reel 51 described above. The base end (inlet) of the turned hose 40 is connected. Water supplied from the pump 152 is supplied to the watering nozzle 35 through the water supply pipe 153, the coupling 54 and the hose 40, and is sprayed from the watering nozzle 35.

  Further, in the present embodiment, the target plate 55 is placed on the first tubular member 21a (appropriately described as “first tubular member 21a”) counted from the tip, and the last tubular member 21e (appropriately referred to as “fifth tube”). A distance meter 56 is provided on the member 21e ". The distance meter 56 is a sensor that detects the distance between the first and last tubular members 21a and 21e (that is, the extension of the telescopic mechanism 21) counted from the front end of the telescopic mechanism 21, and in this embodiment, for example, a laser distance. A meter is used. That is, the distance meter 56 measures the distance to the target plate 55 by irradiating the target plate 55 with a laser, and outputs it to the control device 60 described later. The type of the distance meter 56 is not particularly limited as long as it can detect a distance between two points that changes in relation to the extension state of the telescopic mechanism 21.

4). Telescopic Mechanism Unit FIG. 7 is a schematic diagram showing the internal configuration of the telescopic mechanism unit. As shown in the figure, the cylindrical members 21a-21e constituting the telescopic mechanism portion 21 are configured such that those adjacent in the extending direction slide and extend. Specifically, the first cylindrical member 21a is accommodated in a second cylindrical member 21b (referred to as “second cylindrical member 21b” as appropriate) counting from the tip so as to freely enter and exit. Similarly, the second cylindrical member 21b is the third cylindrical member 21c (referred to as “third cylindrical member 21c” as appropriate), and the third cylindrical member 21c is the fourth cylindrical member 21d (appropriately referred to as “appropriately“ The fourth tubular member 21d is stored in the fifth tubular member 21e so as to be freely accessible.

  The telescopic part 20 is provided with a plurality of cylinders 26a-26c that extend and contract the telescopic mechanism part 21. These cylinders 26a-26c are, for example, single-rod double-acting hydraulic cylinders, which are accommodated in the hollow portion of the telescopic mechanism portion 21, and are respectively fixed to the inner wall surfaces near the base end portions of the corresponding cylindrical members of the telescopic mechanism portion 21. Yes. Specifically, the cylinder 26a (appropriately described as “first cylinder 26a”) is connected to the second cylindrical member 21b, and the cylinder 26b (appropriately described as “second cylinder 26b”) is connected to the third cylindrical member 21c. 26c (referred to as “third cylinder 26c” as appropriate) is fixed to the fourth cylindrical member 21d near the base of the cylinder tube 27 by a support member (not shown). The cylinders 26 a to 26 c extend in the telescopic direction of the telescopic mechanism portion 21 by connecting the rod 28 and the cylinder tube 27 adjacent to each other in the telescopic direction. Specifically, the rod 28 of the first cylinder 26a is near the base end of the cylinder tube 27 of the second cylinder 26b, and the rod 28 of the second cylinder 26b is near the base end of the cylinder tube 27 of the third cylinder 26c. These are connected via a support member 29. The tip of the rod 28 of the third cylinder 26c is fixed near the base end of the fifth cylindrical member 21e.

  At this time, pulleys 31 and 32 are provided in the first cylinder 26 a located at the most distal end side of the telescopic mechanism portion 21. A pulley 31 (appropriately described as “first pulley 31”) is provided on one side (bottom side) of the cylinder tube 27 of the cylinder 26a, and a pulley 32 (appropriately described as “second pulley 32”) is provided on the cylinder tube 27. The other side (rod side) is rotatably attached in a posture in which the rotation axes are parallel to each other. A rope 33 (for example, a wire rope) is hung around these pulleys 31 and 32. Both ends of the rope 33 are fixed to the cylinder tube 27 of the second cylinder 26b, and a portion between the pulleys 31 and 32 is fixed to the inner wall surface of the first cylindrical member 21a by a fixing member 34.

5. Circuit FIG. 8 is a diagram showing an extracted main part of the circuit diagram of the watering system shown in FIG. Among the reference numerals shown in FIG. 8, the same elements as those in the above-described drawings represent elements already described in the above-mentioned drawings. As shown in this figure, the first to third cylinders 26a to 26c are connected in series. The rod side oil chamber of the third cylinder 26c is connected to the bottom side oil chamber of the second cylinder 26b, and the rod side oil chamber of the second cylinder 26b is connected to the bottom side oil chamber of the first cylinder 26a. The rod side oil chamber of the first cylinder 26 a and the bottom side oil chamber of the third cylinder 26 c are connected to the control valve 62. A hydraulic pump 61 and a hydraulic oil tank 63 are connected to the control valve 62. The control valve 62, the hydraulic pump 61, and the hydraulic oil tank 63 are provided in the swing body 102 of the work machine 100. Although not particularly illustrated, the pressure oil discharged from the hydraulic pump 61 can be supplied to other actuators such as the boom cylinder 107. When the control valve 62 is in the center position in the figure, the communication between the hydraulic pump 61 and the hydraulic oil tank 63 and the first and third cylinders 26a and 26c is cut off. When the control valve 62 is switched to the left position in the figure, the hydraulic pump 61 is connected to the bottom side oil chamber of the third cylinder 26c, and the hydraulic oil tank 63 is connected to the rod side oil chamber of the first cylinder 26a. Conversely, when the control valve 62 is switched to the right position in the figure, the hydraulic pump 61 is connected to the rod side oil chamber of the first cylinder 26a, and the hydraulic oil tank 63 is connected to the bottom side oil chamber of the third cylinder 26c.

  The control valve 62 is controlled to be switched by a switching signal from the control device 60, for example. The control device 60 is provided in the swing body 102 of the work machine 100. The switching signal is output from the control device 60 in accordance with a signal from the operation device 64. Here, the case where the operation device 64 is an electric lever device is described. However, a configuration in which the control valve 62 is controlled without using the control device 60 using a hydraulic pilot lever may be used. In the case of this embodiment, for example, an electromagnetically driven valve 66 is provided in the middle of the water supply pipe 153 or the hose 40. The valve 66 is opened and closed by a command signal from the control device 60. This command signal is output from the control device 60 in response to a signal from the operation device 67. The operation devices 64 and 67 are provided, for example, in the cab 110 of the work machine 100.

  Further, the control device 60 calculates an evaluation value related to the aircraft stability based on the signals of the distance meter 56 and the angle sensor 116 described above, and whether or not the aircraft stability satisfies a preset criterion based on the evaluation values. It functions as a determination device. Specifically, the control device 60 calculates the distance between the distance meter 56 and the target plate 55 (FIG. 4 and the like) from the signal from the distance meter 56, and determines the angle of the watering attachment 106 relative to the arm 105 from the signal from the angle sensor 116. Calculate and multiply the calculated values to calculate the evaluation value. Then, a threshold value for a preset evaluation value is read from the storage area, and when the evaluation value exceeds the threshold value, a signal is output to the alarm device 65 that the aircraft stability does not satisfy the standard. The alarm device 65 is a speaker provided in the cab 110, for example, and outputs an alarm with an alarm sound to notify the operator or the operator and the surroundings that the aircraft stability is low. However, the alarm device 65 is not limited to a device that audibly alerts the operator, and means of other modes such as a device that outputs a visual alarm such as a monitor or a lamp can be used. .

6). Operation (1) Expansion / contraction of watering attachment When watering work is performed, the work machine 100 is moved to a desired location, and the watering attachment 106 is extended according to the height of the watering target. When the sprinkling attachment 106 is extended, the boom cylinder 107, the arm cylinder 108, and the attachment cylinder 109 are contracted as necessary to bring the working device 103 into an upright posture, and the operation device 64 is appropriately operated to operate the sprinkling attachment 106. 1- Extend the third cylinders 26a-26c. When the first to third cylinders 26a to 26c extend, the second to fourth cylindrical members 21b to 21d fixed to the first to third cylinders 26a to 26c as shown in FIG. 7 are shown in FIG. As described above, it moves in the extending direction (left side in the figure) starting from the fifth cylindrical member 21e. Further, as the first cylinder 26a extends, the cylinder tube 27 of the first cylinder 26a moves in the same direction with respect to the cylinder tube 27 of the second cylinder 26b, and the rope 33 orbits around the pulleys 31 and 32. By being pulled through the fixing member 34, the first tubular member 21a is moved in the extending direction with respect to the second tubular member 21b as shown in FIG. The state when the first to third cylinders 26a-26c are most extended (that is, when the telescopic mechanism portion 21 is most extended) is the state shown in FIG.

  At that time, the hose 40 connected to the water spray nozzle 35 is pulled out from the hose reel 50 while being guided by the guide rollers 41-45 as the telescopic mechanism portion 21 extends. FIG. 10 shows a state in which the watering attachment 106 is most extended from the posture shown in FIG.

  When the watering attachment 106 is contracted, the reverse procedure is performed.

(2) Sprinkling In addition to the first to third cylinders 26a to 26c, the boom cylinder 107, the arm cylinder 108, the attachment cylinder 109, the turning motor, and the traveling motor 118 are appropriately driven to determine the position of the sprinkling attachment 106 according to the sprinkling target. After the adjustment, the operation device 67 is operated to open the valve 66 (FIG. 8). Thereby, water discharged from the pump 152 is jetted from the water spray nozzle 35 through the valve 66, the water supply pipe 153 and the hose 40. After that, if the operating device 67 is operated to close the valve 66, the watering stops.

(3) Warning As described above, the signals of the angle sensor 116 and the distance meter 56 are input to the control device 60, and the control device 60 extends the watering attachment 106 or sprinkles while moving the working device 103. When the airframe stability is lowered due to the posture (length and angle) of the watering attachment 106, an alarm is output to notify the operator or the like. As an example, when the product of the length and the angle of the watering attachment 106 exceeds the threshold value as described above, the control device 60 outputs an alarm via the alarm device 65.

7). Effect (1) Easiness of Desorption / Removal FIG. 11 is a diagram illustrating a plurality of general work attachments that are detached from the work device of the work machine. Fig. 11 (a) is a crusher for splitting used at the site of dismantling, Fig. 11 (b) is a fork grapple used for scrap processing and transportation of waste materials, and Fig. 11 (c) is excavation and crushing of bedrock and concrete. Fig. 11 (d) shows a bucket used for excavation and transportation of earth and sand or concrete trash, and Fig. 11 (e) shows a watering attachment 106 according to the present embodiment. As shown in FIG. 11, each attachment has a connecting portion 10 having a similar structure (same as the connecting portion of the watering attachment 106 for simplicity). Various attachments connect the pin hole 13 to the tip of the arm 105 with the pin 114 (FIG. 2), and connect the pin hole 14 with the tip of the link 112 (FIG. 2) to the pin 115 (FIG. 2). 105 is attached. In the case of an attachment equipped with a hydraulic drive device such as a crusher, grapple, breaker, etc., the hydraulic drive pipe (not shown) for attachment wound around the work device 103 of the work machine 100 is further disconnected and the hydraulic drive device is connected. To do.

  Since the watering attachment 106 includes the connecting portion 10 having the pin holes 13 and 14 similarly to these attachments, it can be easily attached to and detached from the arm 105 like other attachments. Therefore, it can be easily exchanged with another attachment.

  It should be noted that the hydraulic piping of the first to third cylinders 26a-26c can be easily connected using the existing hydraulic piping provided in the working device 10 in the same manner as the crusher and the like. Further, the watering attachment 106 of the present embodiment can stand on its own with the abdominal side faced downward by the stand 25 (FIG. 2 and the like). Therefore, for example, a heavy machine such as a crane is used by operating the work machine 100 and aligning the positions of the ends of the arm 105 and the link 112 with respect to the pin holes 13 and 14 of the watering attachment 106 placed on the ground or a loading platform. The watering attachment 106 can be attached without any problems. The watering attachment 106 can also be removed by operating the work machine 100 and lowering the watering attachment 106 to the ground or a loading platform in a horizontal posture and removing the pins 114 and 115 and the like. This point can also contribute to facilitating attachment replacement work.

(2) Ensuring the height of the watering position The watering attachment 106 of the present embodiment employs a multistage expansion / contraction mechanism that expands / contracts the telescopic mechanism portion 21 composed of the plurality of cylindrical members 21a-21e by the plurality of cylinders 26a-26c. . Accordingly, since the expansion / contraction rate of the watering attachment 106 can be increased, the watering attachment 106 can be extended higher, and water can be sprinkled to a higher place. Connecting cylinders 26a-26c and connecting them in a series circuit also contributes to an increase in the expansion / contraction rate.

(3) Weight reduction In the telescopic mechanism part 21 of the watering attachment 106, the 1st-3rd cylinder 26a-26c is being fixed to the 2nd-4th cylindrical member 21b-21d, and the 5th cylindrical member 21e. The first to third cylinders 26a to 26c move with the expansion and contraction as a starting point, but there is no cylinder fixed to the first cylindrical member 21a. Instead, the pulleys 31 and 32 and the rope 33 are used to transmit power to the first cylindrical member 21a using the relative displacement of the cylinder tube 27 of the first and second cylinders 26a and 26b. Thereby, the number of cylinders can be suppressed, and the watering attachment 106 can be reduced in weight.

  Further, as described above, the watering attachment 106 includes the link 22 that forms a truss together with the telescopic mechanism 21 and the connecting portion 10 as shown in FIG. By connecting the telescopic mechanism part 21 and the connecting part 10 with the link 22, the moment applied to the expansion / contraction part 20 can be obtained without taking the width of the telescopic mechanism part 21 (the distance from the abdominal side surface to the back side surface) larger than necessary. The connecting portion 10 can be firmly supported. Thereby, the diameter increase of the telescopic mechanism part 21 can be suppressed, and the weight reduction of the watering attachment 106 can be anticipated also in this respect.

  By reducing the weight of the watering attachment 106 in this way, it is possible to appropriately ensure the operating range of the work device 103 that does not impair the stability of the airframe while ensuring a high expansion / contraction rate of the watering attachment 106.

(4) Safety Since the expansion / contraction rate of the watering attachment 106 is large, the center of gravity of the airframe can move back and forth depending on the extension and posture (angle) of the watering attachment 106. In this embodiment, as described above, the angle sensor 116 and the distance Based on the total 56 signals, the control device 60 determines the stability of the airframe, and when a situation where there is a concern about the deterioration of the airframe stability, an alarm device 65 outputs an alarm and alerts the operator and the surroundings. This point contributes to ensuring safety.

8). Others Although only the first cylindrical member 21a is configured to move by the pulley, the number of the cylindrical members that are moved by the pulley is not limited to one, and a plurality of cylindrical members may be moved by the pulley. For example, in addition to the first cylindrical member 21a, another cylindrical member (for example, the second cylindrical member 21b) may be a mechanism that moves by a pulley. Moreover, although the case where the number of expansion / contraction steps of the telescopic mechanism unit 21 is four has been described as an example, for example, three steps or five or more steps may be used.

  Moreover, although the structure which starts and stops watering by opening and closing the valve 66 was illustrated, for example, a signal is output from the control device 60 to the pump 152 according to the operation of the operating device 67, and watering is performed by driving and stopping the pump 152. It is also conceivable to adopt a configuration for starting and stopping.

  Moreover, although the example which calculates the evaluation value of a body safety | security considering only the angle of the watering attachment 106 with respect to the extension condition of the watering attachment 106 was demonstrated, the angle of the boom 104 and the arm 105 was also considered. Alternatively, the evaluation value may be calculated by calculating the posture.

DESCRIPTION OF SYMBOLS 10 ... Connection part, 20 ... Expansion-contraction part, 21 ... Telescopic mechanism part, 21a ... Cylindrical member (1st cylindrical member), 21b ... Cylindrical member (2nd cylindrical member), 21c ... Cylindrical member (3rd Cylindrical member), 21d ... cylindrical member (fourth cylindrical member), 21e ... cylindrical member (fifth cylindrical member), 26a ... cylinder (first cylinder), 26b ... cylinder (second cylinder), 26c ... Cylinder (third cylinder), 27 ... Cylinder tube, 28 ... Rod, 31 ... Pulley (first pulley), 32 ... Pulley (second pulley), 33 ... Rope, 34 ... Fixing member, 35 ... Sprinkling nozzle 40 ... Hose, 50 ... Hose reel, 54 ... Coupling, 56 ... Distance meter, 60 ... Control device (judgment device), 65 ... Alarm device, 100 ... Working machine, 103 ... Working device, 104 ... Boom, 105 ... Arm, 106 ... Watering attachment Cement, 113 ... vehicle, 116 ... angle sensor, 151 ... water tank, 152 ... pump, 153 ... water supply pipe

Claims (6)

For an articulated work device including a boom connected to a vehicle body of a work machine, an arm connected to the tip of the boom, and an attachment connected to the tip of the arm, connected to the tip of the arm instead of the attachment A watering attachment that
A connecting portion connected to the tip of the arm;
A stretchable part extending from the connecting part;
A watering nozzle attached to the tip of the stretchable part;
A hose connected to the watering nozzle;
A hose reel provided on the connecting part or the expansion and contraction part and having a rotatable coupling connected to the hose and winding the hose;
The stretchable part is
A telescopic mechanism composed of a plurality of cylindrical members;
A watering attachment comprising: a plurality of cylinders that are respectively fixed to corresponding cylindrical members of the telescopic mechanism and extend and contract the telescopic mechanism.   The watering attachment according to claim 1, wherein the plurality of cylinders are connected to each other in such a manner that adjacent rods and cylinder tubes are connected to each other, extend in a telescopic direction of the telescopic mechanism, and are connected in series. Watering attachment. The watering attachment according to claim 2,
A first pulley attached to one side of a cylinder tube of a first cylinder attached to a second second cylindrical member counted from the tip of the telescopic mechanism,
A second pulley attached to the other side of the cylinder tube;
Both ends are fixed to the cylinder tube of the second cylinder attached to the third third cylindrical member counted from the tip, and a rope hung around the first and second pulleys;
A fixing member that fixes the rope to the first first cylindrical member counted from the tip;
The first cylindrical member is pulled through the fixing member to the rope that circulates around the first and second pulleys as the first cylinder expands and contracts, thereby the second cylindrical member. A watering attachment that moves relative to a member. The car body,
A boom connected to the vehicle body;
An arm connected to the tip of the boom;
The work machine provided with the watering attachment of Claim 1 connected with the front-end | tip of the said arm. The work machine according to claim 4,
A distance meter for measuring the distance between the first and last cylindrical members counted from the tip of the telescopic mechanism,
An angle sensor for detecting an angle of the watering attachment;
A determination device that calculates an evaluation value related to airframe stability based on signals from the distance meter and the angle sensor, and determines whether or not the airframe stability satisfies a preset criterion based on the evaluation value;
A work machine comprising: an alarm device that outputs an alarm by a signal output from the determination device when the evaluation value does not satisfy the criterion. A work machine according to claim 4;
A water tank,
A pump for sucking and discharging the water in the water tank;
A watering system comprising a water supply pipe connecting the pump to the coupling of the hose reel.

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