JP2022047233A - Work machine - Google Patents

Abstract

To provide a work machine which prevents interference of a hose with a vehicle body during sprinkling and reduces a dead angle from a driver seat during traveling.SOLUTION: A work machine 1 includes: a long tubular water supply pipe 40 having an internal passage capable of passing water; an upstream side inlet 41 that is provided on the tip of the water supply pipe 40 and can connect an upstream side flow channel member to which water is supplied from a water storage tank; an outlet 42 which is provided on a side closer to the base end side of the water supply pipe 40 than the upstream side inlet 41 and can connect a downstream side flow channel member for supplying water to a sprinkling attachment 20; a support member 44 which rotatably supports a base end of the water supply pipe 40 relative to one support 6a of a pair of supports, and changes the attitude of the water supply pipe 40 between a use attitude where the upstream inlet 41 projects to the rear part of the work machine and a storage attitude where an outer surface of the water supply pipe 40 is brought into contact with the other support 6b of the pair of supports; and fixing members 46 and 47 for fixing the water supply pipe 40 in the storage attitude to the other support 6b of the pair of supports.SELECTED DRAWING: Figure 1

Description

The present invention relates to a working machine provided with a watering nozzle.

At the demolition work site, it is necessary to suppress the generation and diffusion of dust when the demolition machine dismantles the object to be demolished (for example, a building). As a work machine used for such an application, a watering machine in which a watering nozzle is attached to the tip of the front working machine is known (see, for example, Patent Document 1).

In such a sprinkler, measures are required so that the hose connected to the external water storage tank does not interfere with the sprinkler. Therefore, as an example of interference prevention measures, there is known a hose guide that extends to the rear of the vehicle body during work and rotates toward the driver's seat side during storage to fit within the full length of the vehicle body (for example, Patent Document 2). reference).

Japanese Patent No. 4355646 Japanese Unexamined Patent Publication No. 7-67512

However, in the hose guide of Patent Document 2, a blind spot is generated on the side of the driver's seat at the time of storage. Therefore, a new problem arises that it becomes difficult to run the work machine with the hose guide stored.

The present invention has been made in view of the above-mentioned actual conditions, and an object thereof is to prevent a hose from interfering with a vehicle body during watering in a work machine equipped with a watering nozzle, and to prevent a blind spot from the cockpit during traveling. Is to provide the technology to reduce the number of.

In order to achieve the above object, the present invention includes a lower traveling body, an upper rotating body rotatably supported by the lower traveling body and having a cockpit, and a boom undulatingly supported by the upper rotating body. , A sprinkler attachment that is undulatingly supported by the tip of the boom and sprinkles water, a pair of stanchions erected behind the cockpit in the left-right direction, and the upper end of the pair of stanchions. A work machine with a canopy that is supported and has a roof that covers the cockpit, a long tubular water supply pipe with an internal passage through which water can flow, and a water storage tank provided at the tip of the water supply pipe. An upstream inlet to which an upstream channel member to which water is supplied from the water supply can be connected, and a downstream channel member provided on the base end side of the water supply pipe from the upstream inlet to supply water to the sprinkler attachment. The downstream outlet to which the water supply can be connected, the usage posture in which the base end of the water supply pipe is rotatably supported with respect to one of the pair of columns, and the upstream inlet protrudes to the rear of the work machine, and the above. A support member that changes the posture of the water supply pipe and a fixing member that fixes the water supply pipe in the storage posture to the other of the pair of columns while the outer surface of the water supply pipe is in contact with the other of the pair of columns. It is characterized by having and.

According to the present invention, it is possible to prevent the hose from interfering with the vehicle body during watering and to reduce the blind spot from the cockpit during traveling. Issues, configurations and effects other than those described above will be clarified by the following description of the embodiments.

It is a side view of the work machine which concerns on this embodiment. It is a side view of the work machine in the state where the sprinkler attachment is grounded. It is a perspective view of a canopy and a water supply pipe. It is an enlarged view around the fixing ring.

An embodiment of the work machine according to the present invention will be described with reference to the drawings. FIG. 1 is a side view of the work machine 1 according to the present embodiment. FIG. 2 is a side view of the work machine 1 in a state where the sprinkler attachment 20 is grounded. Unless otherwise specified, the front, back, left, and right in the present specification are based on the viewpoint of the operator who is on board and operates the work machine 1.

The work machine 1 includes a lower traveling body 2 and an upper turning body 3 supported by the lower traveling body 2. The work machine 1 shown in FIG. 1 is a so-called "small swivel machine". The small swivel machine is an upper part within a range surrounded by the front end, the rear end, and both outer ends of the pair of left and right crawlers 8 described later, regardless of the turning angle of the upper swivel body 3 when the work machine 1 is viewed in a plan view. Refers to a model in which the swivel body 3 fits. However, the work machine to which the present invention can be applied is not limited to the small swivel machine.

The lower traveling body 2 includes a pair of crawlers 8. The pair of crawlers 8 are arranged at positions separated from each other in the left-right direction. Further, each of the pair of crawlers 8 is extended in the front-rear direction. Further, the rear ends of the pair of crawlers 8 are located behind the upper swivel body 3. Then, when the rotation of the traveling motor (not shown) is transmitted and the pair of left and right crawlers 8 rotate, the work machine 1 travels.

The upper swivel body 3 is supported by the lower traveling body 2 so as to be swivelable. The rotation of the swivel motor (not shown) is transmitted to the upper swivel body 3, and the upper swivel body 3 swivels around a rotation axis extending in the vertical direction with respect to the lower traveling body 2. The upper swivel body 3 mainly includes a seat 4, an operating device 5, a canopy 6, a counterweight 7, and a front working machine 10.

The seat 4 is a driver's seat in which an operator who operates the work machine 1 is seated. The front of the operator seated on the seat 4 is the front of the upper swivel body 3. The operating device 5 is operated by an operator to operate the work machine 1, and is, for example, a steering wheel, a pedal, a lever, a switch, or the like. Then, when the operator seated on the seat 4 operates the operating device 5, the lower traveling body 2 travels, the upper swivel body 3 turns, and the front working machine 10 operates.

The canopy 6 is a member that covers the upper part of the seat 4. The structure of the canopy 6 will be described later with reference to FIG. The counterweight 7 is a heavy object that is arranged at the rear of the upper swing body 3 and balances the weight with the front working machine 10.

The front working machine 10 has a boom 11 supported by the upper swivel body 3 so as to be swivelable and undulating, a sprinkler attachment 20 supported by the tip of the boom 11 so as to be undulating, and a boom 11 to the upper swivel body 3. It mainly includes a swivel cylinder 12 that swivels, a hydraulic cylinder 13 that raises and lowers the boom 11 with respect to the upper swivel body 3, and a hydraulic cylinder 14 that raises and lowers the sprinkler attachment 20 with respect to the boom 11.

The boom 11 is a long member having one end supported by the upper swing body 3 and the other end supporting the sprinkler attachment 20. Further, the boom 11 is bent so that the back surface side has a convex shape (in other words, the ventral surface side has a concave shape). The back surface of the boom 11 is a surface facing rearward when the boom 11 stands up (FIG. 1) and upward when the boom 11 falls down (FIG. 2).

The watering attachment 20 is undulatingly supported by the tip of the boom 11 and sprinkles the water supplied from the water storage tank 50. The watering attachment 20 mainly includes a watering nozzle 21 for sprinkling water and a nozzle holder 22 attached to the tip of the boom 11 and holding the watering nozzle 21.

In the hydraulic cylinder 13, the cylinder tube 13a is rotatably supported by the upper swing body 3, and the cylinder rod 13b is rotatably supported by the ventral surface of the boom 11. When the cylinder rod 13b protrudes from the cylinder tube 13a (that is, the hydraulic cylinder 13 extends), the boom 11 stands up. On the other hand, when the cylinder rod 13b is immersed in the cylinder tube 13a (that is, the hydraulic cylinder 13 is reduced), the boom 11 falls down.

In the hydraulic cylinder 14, the cylinder tube 14a is rotatably connected to the back surface of the boom 11, and the cylinder rod 14b is rotatably connected to the base end portion of the sprinkler attachment 20. When the cylinder rod 14b protrudes from the cylinder tube 14a (that is, the hydraulic cylinder 14 extends), the tip opening of the watering nozzle 21, which will be described later, faces downward. On the other hand, when the cylinder rod 14b is immersed in the cylinder tube 14a (that is, the hydraulic cylinder 14 is reduced), the tip opening faces upward.

Further, as shown in FIG. 2, the sprinkler attachment 20 is placed on the ground G by adjusting the expansion / contraction amount of the hydraulic cylinders 13 and 14. After the work by the work machine 1 is completed, the work machine 1 is parked with the sprinkler attachment 20 grounded.

Further, the work machine 1 is connected to the water storage tank 50 through the water supply pipe 40. As shown in FIGS. 1 and 2, the water storage tank 50 and the pump 51 are connected by a hose 52, the pump 51 and the water supply pipe 40 are connected by a hose 53, and the water supply pipe 40 and the hose connecting member 56 are connected by a hose 54. The hose connecting member 56 and the sprinkler attachment 20 are connected by a hose 55.

Then, by driving the pump 51, the water stored in the water storage tank 50 is supplied to the watering attachment 20 through the hose 52, 53, the water supply pipe 40, the hose 54, the hose connecting member 56, and the hose 55, and the watering nozzle. Water is sprinkled from the tip of 21. The hose 53 is an example of an upstream side flow path member, and the hoses 54, 55 and the hose connection member 56 are examples of a downstream side flow path member.

The hoses 52 to 54, the water supply pipe 40, and the hose connecting member 56 are flow path members having an internal passage through which water flows. Further, the hoses 52 to 54 are flexible flow path members. On the other hand, the water supply pipe 40 and the hose connecting member 56 are long tubular flow path members that extend linearly (that is, have no flexibility).

The hose connecting member 56 is fixed to the right side surface of the upper swing body 3 and extends in the front-rear direction. One end of the hose 54 (first hose) is detachably connected to the downstream outlet 42 described later of the water supply pipe 40, and the other end is detachably connected to the rear end of the hose connecting member 56. One end of the hose 55 (second hose) is detachably connected to the sprinkler attachment 20, and the other end is detachably connected to the front end of the hose connecting member 56. Further, the hose 55 extends along the back surface of the boom 11.

The hose connecting member 56 is arranged below the water supply pipe 40. Further, the hose connecting member 56 is arranged below the uppermost position (that is, the bent portion) of the boom 11 when the sprinkler attachment 20 touches the ground G. In other words, the hose connecting member 56 is arranged below the uppermost position of the hose 55 when the sprinkler attachment 20 touches the ground G.

Further, the hose connecting member 56 is provided with a sprinkler valve 57. The sprinkler valve 57 is configured to be switchable between an open position that opens the internal passage of the hose connecting member 56 (that is, allows water flow) and a closed position that closes the internal passage (that is, blocks the flow of water). Has been done.

Next, the details of the canopy 6 and the water supply pipe 40 will be described with reference to FIGS. 3 and 4. FIG. 3 is a perspective view of the canopy 6 and the water supply pipe 40. FIG. 4 is an enlarged view of the periphery of the fixing rings 46 and 47 (fixing members).

As shown in FIG. 3, the canopy 6 mainly includes columns 6a, 6b, 6c, a roof 6d, a beam 6e, and a front fence 6f. The columns 6a and 6b are erected on the upper swivel body 3 at positions separated from each other in the left-right direction behind the seat 4. The support column 6c is erected on the upper swivel body 3 on the right front side of the seat 4. The roof 6d is supported by the upper ends of the columns 6a to 6c and covers the upper part of the seat 4. The beam 6e is reinforced by connecting the columns 6a and 6b. The front fence 6f is supported by the upper swivel body 3 and the support column 6c and covers the front of the seat 4.

The water supply pipe 40 mainly includes an upstream inlet 41, a downstream outlet 42, and a fixing ring 43. The upstream inlet is provided at one end (rotating tip) of the water supply pipe 40. The downstream outlet 42 projects from the upstream inlet 41 on the proximal end side of the water supply pipe 40 in a direction orthogonal to the extending direction of the water supply pipe 40. A hose 53 is connected to the upstream inlet 41, and a hose 54 is connected to the downstream outlet 42. The fixing ring 43 is fixed to the fixing rings 46 and 47 provided on the support column 6b via the pin 48.

The water supply pipe 40 is attached to the support column 6a below the upper end (more specifically, the headrest) of the seat 4 (FIG. 1) and above the beam 6e (FIG. 3). Further, the base end portion of the water supply pipe 40 is rotatably supported by the support column 6a by the hinge member 44 (support member). More specifically, the hinge member 44 rotates the water supply pipe 40 around a rotation axis extending in the vertical direction (in other words, on a horizontal plane). Further, the water supply pipe 40 is attached to the support column 6a so as to be parallel to the rotation axis of the hinge member 44 and to project the downstream outlet 42 downward.

As a result, the water supply pipe 40 can rotate between the usage posture shown in FIG. 3A and the storage posture shown in FIG. 3B. The usage posture is a posture in which the water supply pipe 40 protrudes rearward from the support column 6a. When the water supply pipe 40 is in the working position, the upstream inlet 41 is located behind the work machine 1 (more specifically, the rear end of the crawler 8). On the other hand, the storage posture is a posture in which the water supply pipe 40 projects laterally (to the left) from the support column 6a. When the water supply pipe 40 is in the retracted posture, the outer peripheral surface of the water supply pipe 40 comes into contact with the support column 6b from the rear side.

As shown in FIG. 4, the fixing rings 46 and 47 (fixing members) are fixed to the columns 6b at positions communicating with the fixing ring 43 when the water supply pipe 40 is in the accommodating posture. Then, by inserting the pin 48 into the communicating fixing rings 43, 46, 47, the water supply pipe 40 in the accommodating posture is fixed to the support column 6b. However, specific examples of the fixing member are not limited to the fixing rings 46 and 47, and may be a magnet or the like.

On the other hand, by removing the pin 48 from the fixing rings 43, 46, 47, the water supply pipe 40 becomes rotatable. It should be noted that the water supply pipe 40 does not need to be fixed to the use posture at the time of watering, and may rotate within a range of 90 ° or 180 ° as the upper swivel body 3 turns.

The length of the water supply pipe 40 is set to a length that satisfies the following three conditions. First, the length of the water supply pipe 40 is set to a length at which the upstream inlet 41 is located behind the rear end of the crawler 8 when the water supply pipe 40 is in the use posture. Further, the length of the water supply pipe 40 is set longer than the distance between the columns 6a and 6b. Further, the length of the water supply pipe 40 is set shorter than the width in the left-right direction of the upper swivel body 3.

According to the above embodiment, for example, the following effects are exhibited.

According to the above embodiment, since the water supply pipe 40 changes its posture between the usage posture and the accommodation posture behind the seat 4, the hose 53 is prevented from interfering with the vehicle body during watering, and the seat 4 is running. You can reduce the blind spot from.

Further, by setting the length of the water supply pipe 40 so as to satisfy the above-mentioned conditions, it is possible to simultaneously satisfy the prevention of interference during watering and the limitation of the vehicle width during traveling. Further, by arranging the water supply pipe 40 below the upper end of the sheet 4, the blind spot can be further reduced. Further, by fixing the water supply pipe 40 in the stowed posture to the support column 6b, it is possible to prevent the water supply pipe 40 from rotating during traveling.

Further, according to the above embodiment, since the water supply pipe 40 in the storage posture is connected to the pair of columns 6a and 6b, it functions as a beam for reinforcing the canopy 6. As a result, the rigidity of the canopy 6 when the work machine 1 is running is improved.

Further, according to the above embodiment, by projecting the downstream outlet 42 in parallel with the rotation axis of the water supply pipe 40 and downward, bending of the hose 53 is reduced even if the upper swivel body 3 is swiveled at the time of watering. can do. Further, by making the water supply pipe 40 rotatable along with the turning of the upper swivel body 3 at the time of watering, the hose 53 can be arranged at the shortest distance between the pump 51 and the upstream inlet 41.

Further, according to the above embodiment, the hoses 54 and 55 can be removed by the following procedure. First, the operator switches the sprinkler valve 57 to the closed position. Next, as shown in FIG. 2, the operator adjusts the expansion / contraction amount of the hydraulic cylinders 13 and 14 to bring the sprinkler attachment 20 into contact with the ground G. As a result, the water on the tip side from the uppermost position of the hose 55 is discharged through the sprinkler attachment 20.

Next, the operator removes the hoses 54 and 55 from the hose connecting member 56. As a result, the water in the water supply pipe 40 and the hose 54 is discharged through the hose 54, and the water on the proximal end side from the uppermost position of the hose 55 is discharged through the hose 55. By arranging the hose connecting member 56 at the position shown in FIG. 2 in this way, the water in the hoses 54 and 55 can be drained only by performing the work around the seat 4 and the hose connecting member 56.

Further, according to the above embodiment, the water supply pipe 40 having an internal passage through which water flows is projected to the rear of the work machine 1. As a result, the number of parts can be reduced and the weight can be reduced as compared with the case where the hose is extended along the hose guide as in Patent Document 2.

The embodiments described above are examples for the purpose of explaining the present invention, and the scope of the present invention is not limited to those embodiments. Those skilled in the art can practice the invention in various other embodiments without departing from the gist of the invention.

1 Work machine 2 Lower traveling body 3 Upper swivel body 4 Seat 5 Operating device 6 Canopy 6a, 6b, 6c Strut 6d Roof 6e Beam 6f Front fence 7 Counter weight 8 Crawler 10 Front working machine 11 Boom 12 Swing cylinder 13, 14 Hydraulic cylinder 13a, 14a Cylinder tube 13b, 14b Cylinder rod 20 Watering attachment 21 Watering nozzle 40 Water supply pipe 41 Upstream side inlet 42 Downstream side outlet 43 Fixing ring 44 Hing member (support member)
46,47 Fixing ring (fixing member)
48 Pin 50 Water storage tank 51 Pump 52,53 Hose 54 Hose (1st hose)
55 hose (second hose)
56 Hose connection member 57 Sprinkler valve

Claims (4)

With the lower running body,
An upper swivel body that is rotatably supported by the lower traveling body and has a cockpit, and an upper swivel body.
A boom that is undulatingly supported by the upper swing body,
A sprinkler attachment that is undulatingly supported by the tip of the boom and sprinkles water.
A work machine including a pair of columns erected at a distance from each other in the left-right direction behind the driver's seat, and a canopy having a roof supported by the upper ends of the pair of columns and covering the driver's seat.
A long tubular water supply pipe with an internal passage through which water can flow,
An upstream inlet provided at the tip of the water supply pipe and capable of connecting an upstream flow path member to which water is supplied from the water storage tank,
A downstream outlet provided on the base end side of the water supply pipe from the upstream inlet and to which a downstream flow path member for supplying water to the sprinkler attachment can be connected.
The use posture in which the base end of the water supply pipe is rotatably supported with respect to one of the pair of columns and the upstream inlet projects to the rear of the work machine, and the outer surface of the water supply pipe is the pair of columns. A support member that changes the posture of the water supply pipe between the storage postures in contact with the other of the water supply pipes.
A work machine including a fixing member for fixing the water supply pipe in the storage posture to the other of the pair of columns. In the work machine according to claim 1,
The lower traveling body each has a pair of crawlers extending in the front-rear direction.
The water supply pipe
With the length at which the upstream inlet is located behind the rear ends of the pair of crawlers in the usage posture.
A work machine characterized in that, in the stowed posture, the length is set to be longer than the distance between the pair of columns and shorter than the width in the left-right direction of the upper swing body. In the work machine according to claim 1,
A work machine characterized in that the downstream outlet is parallel to the rotation axis of the water supply pipe and protrudes downward from the water supply pipe. In the work machine according to claim 1,
The downstream side flow path member
A flexible first hose, one end of which is connected to the downstream outlet,
A flexible second hose, one end of which is connected to the sprinkler attachment and extends along the boom.
A hose connecting member to which the other ends of the first hose and the second hose are detachably connected is included.
A work machine characterized in that the hose connecting member is fixed to the upper swing body below the downstream outlet and below the uppermost position of the boom when the sprinkler attachment touches the ground.

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