JP2021063602A - Demolition machine - Google Patents

Abstract

To enable maintenance and replacement of a hydraulic hose for driving attachment and a cable carrier that supports the hydraulic hose without detaching an inner arm.SOLUTION: A demolition machine of this invention comprises: a machine body; a tubular boom connected to the machine body; a tubular outer arm supported to the boom in an auto-rotational manner; an inner arm supported to the outer arm in an advancing/retracting manner; an attachment connected to the inner arm; and a cable carrier that supports a hydraulic hose. The demolition machine is provided with an operation room for the cable carrier, formed in the outer arm and a cover that opens/closes an opening of the operation room that faces the inner arm, in which both ends of the cable carrier are respectively detachably attached to the outer arm and inner arm in an attitude in which a folding part faces the attachment, and is constructed so that the cable carrier can be entirely housed into the operation room in a state in which the inner arm is protruded from the outer arm.SELECTED DRAWING: Figure 3

Description

The present invention relates to a dismantling machine suitable for a work of peeling refractory bricks attached to an inner wall of a converter, a blast furnace, or the like.

The inner walls of converters and blast furnaces are covered with refractory bricks. Since refractory bricks gradually deteriorate with the use of the furnace, they need to be replaced regularly, and are equipped with breakers (crushers) used for rock drilling work to crush old refractory bricks and peel them from the inner wall of the furnace. Brick dismantling machines may be used. As this kind of dismantling machine, there are a boom connected to the car body, an outer arm that is partially stored in the boom and rotates around the axis center line, an inner arm that is stored so that it can move forward and backward with respect to the outer arm, and the tip of the inner arm. Some are equipped with a mounted breaker (see Patent Document 1).

Japanese Patent No. 5286685

Since the breaker is attached to the tip of the inner arm, it is necessary to suppress the slack of the hydraulic hose connected to the actuator that drives the breaker in the configuration in which the inner arm moves forward and backward with respect to the outer arm. In addition, since dismantling work such as a converter may be performed in a high temperature environment, a structure in which the hydraulic hose is exposed is not desirable. Therefore, in this type of dismantling machine, it is generally adopted that the cable carrier is used to suppress the slack of the hydraulic hose for driving the breaker, and the cable carrier is housed inside the inner arm to protect the hydraulic hose from high temperature. ..

However, in the dismantling machine of Patent Document 1, the base end of the cable carrier is fixed to the inner wall of the outer arm, while the tip is inserted into the inner arm and fixed to the inner wall of the inner arm. Therefore, when servicing or replacing the hydraulic hose or cable carrier for driving the breaker, it is necessary to remove the inner arm from the outer arm, which requires a large-scale disassembly and assembly work, which requires a great deal of man-hours and labor.

An object of the present invention is to provide a dismantling machine capable of servicing or replacing a hydraulic hose for driving an attachment and a cable carrier supporting the hydraulic hose without removing the inner arm.

In order to achieve the above object, the present invention comprises a vehicle body, a tubular boom connected to the vehicle body, a tubular outer arm rotatably supported by the boom, and a tubular outer arm rotatably supported by the outer arm. An inner arm, an attachment connected to the inner arm, at least one hydraulic actuator for driving the attachment, a hydraulic hose for passing pressure oil for driving the hydraulic actuator, and a cable carrier for supporting the hydraulic hose. In the dismantling machine provided with the above, the operating chamber of the cable carrier located outside the inner arm and formed in the outer arm so as to extend along the inner arm is provided in the operating chamber so as to face the inner arm. The cable carrier is provided with a cover for opening and closing the opening, and the base end and the tip of the cable carrier are detachably attached to the outer arm and the inner arm in a posture in which the folded portion is directed toward the attachment side. When the cable carrier is maximally projected from the outer arm, the tip of the cable carrier attached to the inner arm is located inside the operating chamber, and the entire cable carrier is configured to fit in the operating chamber. It is a feature.

According to the present invention, the hydraulic hose for driving the attachment and the cable carrier supporting the hydraulic hose can be maintained or replaced without removing the inner arm.

Side view of the dismantling machine according to the embodiment of the present invention It is a perspective view of the work machine provided in the dismantling machine which concerns on one Embodiment of this invention, and is the figure which shows the state which the arm was contracted to the shortest. It is a left side view of the work machine provided in the dismantling machine which concerns on one Embodiment of this invention, and is the figure which shows the state which the arm was contracted to the shortest. It is a plan view of the work machine provided in the dismantling machine which concerns on one Embodiment of this invention, and is the figure which shows the state which the arm is contracted to the shortest. It is a front view of the work machine provided in the dismantling machine which concerns on one Embodiment of this invention, and is the figure which shows the state which the arm is contracted to the shortest. It is a left side view of the work machine provided in the dismantling machine which concerns on one Embodiment of this invention, and is the figure which shows the state which extended the arm to the longest. It is a front view of the work machine provided in the dismantling machine which concerns on one Embodiment of this invention, and is the figure which shows the state which the attachment was rotated 90 degrees. Schematic cross-sectional view of the working machine by lines VIII-VIII in FIG. Schematic cross-sectional view of the working machine by IX-IX line in FIG. Left side view showing a scene of removing the cable carrier from the working machine provided in the dismantling machine according to the embodiment of the present invention. A perspective view showing a scene of the work of removing the cable carrier from the work machine provided in the dismantling machine according to the embodiment of the present invention. Left side view of the work machine provided in the dismantling machine according to the comparative example Plan view of the work machine provided in the dismantling machine according to the comparative example Cross-sectional view taken along the line XIV-XIV in FIG.

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

-Dismantling machine-
FIG. 1 is a side view of a dismantling machine according to an embodiment of the present invention. Hereinafter, the front of the operator sitting in the driver's seat (left side in FIG. 1) is referred to as the front of the swivel body 12. The illustrated dismantling machine is configured with a hydraulic excavator as a base machine, and includes a vehicle body 10 and a working machine 20. The vehicle body 10 is composed of a traveling body 11 and a turning body 12.

The traveling body 11 is a base structure of a dismantling machine, and may be a wheel type traveling body, but in the present embodiment, a crawler type traveling body provided with left and right crawler belts 13 is used. The left and right tracks 13 are driven by the left and right traveling drive devices 14, respectively. The traveling drive device 14 includes a hydraulic motor and a speed reducer. The swivel body 12 is provided on the traveling body 11 via a swivel wheel 15, and by driving the swivel wheel 15 with a swivel motor (not shown), the swivel body 12 swivels around the vertical axis with respect to the traveling body 11. The swivel motor is a hydraulic motor, but an electric motor can also be used, or a configuration in which a hydraulic motor and an electric motor are used in combination can be used.

The swivel body 12 includes a swivel frame 16, a driver's cab 17, a machine room 18, a counterweight 19, and the like. The swivel frame 16 is a base frame of the swivel body 12 and supports each device mounted on the swivel body 12. The driver's cab 17 is located on one side in the left-right direction in the front portion of the swivel frame 16, and is located on the left side in this example, but may be arranged on the right side. Although not shown, a driver's seat on which the operator sits, an operating device operated by the operator, and the like are arranged in the driver's cab 17. The counter weight 19 is a weight that balances the weight with the working machine 20, and is supported by the rear end of the swivel frame 16.

The machine room 18 is arranged on the rear side of the driver's cab 17 (position between the driver's cab 17 and the counterweight 19) in the swivel frame 16. The machine room 18 houses a prime mover 1, a hydraulic pump 2, a control valve (not shown), heat exchangers, and the like. Although not shown, tanks (not shown) are arranged on the opposite side of the driver's cab 17 with the working machine 20 in the front part of the swivel frame 16 interposed therebetween. The tanks include a fuel tank, a hydraulic oil tank, and the like. An engine (internal combustion engine) is used for the prime mover 1, but an electric motor can also be used. At least one hydraulic pump 2 is provided and is driven by the prime mover 1 to suck hydraulic oil from the hydraulic oil tank and discharge it as pressure oil. The control valve controls the direction and flow rate of the pressure oil discharged from the hydraulic pump 2 and supplies the pressure oil to the corresponding hydraulic actuator. The heat exchangers include a radiator that cools the engine cooling water, an oil cooler that cools the hydraulic oil, and the like.

-Working machine-
FIG. 2 is a perspective view of a working machine in which the arm is shortened to the shortest, FIG. 3 is a left side view thereof, FIG. 4 is a plan view, and FIG. FIG. 6 is a side view of the working machine with the arm extended to the longest, FIG. 7 is a front view of the working machine with the attachment rotated 90 degrees, and FIG. 8 is a schematic arrow of the working machine according to lines VIII-VIII in FIG. FIG. 9 is a sectional view taken along line IX-IX in FIG. 3, which is a schematic sectional view taken along line the working machine. Although the arm 22 (described later) is shown in the shortest contracted state in FIGS. 2 and 3, the cable carrier 30 (described later) is also shown in the state when the arm 22 is extended to the maximum length. is there.

As shown in FIGS. 1 to 9, the working machine 20 includes a boom 21, an arm 22, an attachment 23, a boom cylinder 24, a motor 25, a telescopic cylinder 26 (FIG. 3), a tilt cylinder 27 (FIG. 3), and a swivel. It is configured to include a joint 28. The arm 22 includes an outer arm 22a and an inner arm 22b.

The boom 21 is a tubular basic structure of the work machine 20, and is rotatably connected to the swivel frame 16 via a foot pin (not shown) extending left and right in a posture in which the axis center line is extended back and forth. There is. Here, the swivel frame 16 is provided with a bracket portion (not shown) for attaching an attachment such as a bucket to connect a standard articulated front working machine used for excavation work or the like. In the present embodiment, the bracket portion is expanded upward by mounting an adapter (not shown), and the boom 21 is connected to the portion expanded by the adapter.

The boom cylinder 24 is a hydraulic cylinder, and connects the swivel frame 16 and the boom 21. The bottom end of the boom cylinder 24 is connected to the bracket of the swivel frame 16 via a pin (not shown) extending to the left and right, and the end on the rod side is boomed via a pin 24b (FIG. 1) extending to the left and right. It is connected to the lower front part of 21. By expanding and contracting the boom cylinder 24, the boom 21 rotates (up and down) in the vertical direction around the foot pin (not shown).

The outer arm 22a is a tubular member extending in the front-rear direction, and a portion on the proximal end side (the right portion in FIG. 1) is inserted into the boom 21. The tip end side portion (left side portion in FIG. 1) of the outer arm 22a protrudes forward from the boom 21. A plurality of support rollers 21x with their central axes oriented back and forth are arranged in an annular shape at the base end of the boom 21, and the outer peripheral surface of the base end of the outer arm 22a is circumscribed and supported by these support rollers 21x. There is. A swivel wheel (bearing) 21y is provided at the tip of the boom 21, and the outer peripheral surface of the outer arm 22a at the intermediate portion in the longitudinal direction is supported by the swivel wheel 21y. As a result, the outer arm 22a is supported by the boom 21 and can rotate (rotate around the axis center line extending in the longitudinal direction). A motor 25 is connected to the swivel wheel 21y, and when the motor 25 is operated, the attachment 23 together with the arm 22 (outer arm 22a and inner arm 22b) rotates 360 ° (fully swivels) with respect to the boom 21 (FIG. FIG. 5, Fig. 7). The motor 25 is a hydraulic motor.

The inner arm 22b is a tubular member that is inserted into the outer arm 22a and supported so as to be able to enter and exit the outer arm 22a. At the tip of the outer arm 22a, a plurality of guide rollers 22x whose central axis is directed in the circumferential direction of the inner arm 22b are arranged in an annular shape. The outer peripheral surface of the inner arm 22b is supported by these guide rollers 22x at a plurality of locations in the circumferential direction. Further, on the outer peripheral surface of the base end of the inner arm 22b, a plurality of guide rollers 22y (FIG. 3) with the central axis directed in the circumferential direction are provided at a plurality of locations in the circumferential direction (in this example, four locations as shown in FIG. 8). These guide rollers 22y are provided and are in contact with the inner peripheral surface of the outer arm 22a. In this way, the inner arm 22b is supported by the outer arm 22a by the guide rollers 22x and 22y. While the inner arm 22b is guided by the guide roller 22x, the guide roller 22y travels on the inner peripheral surface of the outer arm 22a, and the inner arm 22b moves in the longitudinal direction together with the attachment 23 (FIGS. 3 and 6). Then, as the telescopic cylinder 26 (hydraulic cylinder) expands and contracts, the inner arm 22b moves forward and backward (enters and exits the outer arm 22a) with respect to the outer arm 22a, and the arm 22 expands and contracts. The telescopic cylinder 26 passes through the inside of the inner arm 22b, the bottom end of the telescopic cylinder 26 is connected to the inner peripheral surface of the middle portion in the longitudinal direction of the inner arm 22b, and the end on the rod side is the base end of the outer arm 22a. It is connected to the part.

The attachment 23 is a breaker (crusher) in this embodiment, and is connected to the tip of the inner arm 22b. The breaker is equipped with a hydraulic motor (not shown), and this hydraulic motor is driven by the pressure oil supplied from the hydraulic pump 2 (FIG. 1) to reciprocate the chisel 23a at high speed in the axial direction, for example, a converter. Refractory bricks provided on the inner wall (not shown) are crushed with a chisel 23a. However, the reciprocating motion of the breaker chisel may be due to pneumatic pressure. Further, the attachment 23 is connected to the inner arm 22b via the link 27a (FIG. 3) and the tilt cylinder 27 (FIG. 3), and rotates in the direction of the arrow in FIG. 1 as the tilt cylinder 27 expands and contracts. Change the direction of 23a. The tilt cylinder 27 and the above hydraulic motor are hydraulic actuators that drive the attachment 23. The tilt cylinder 27 is arranged inside the inner arm 22b, and the hydraulic motor is mounted on the attachment 23. The attachment 23 can be replaced with another attachment such as a grapple or a subdivision machine depending on the work.

-Cable carrier operating room-
The outer arm 22a in the present embodiment is provided with an operating chamber 22R of the cable carrier 30 (described later). The operating chamber 22R is located on the outside of the inner arm 22b (upper side in the state of FIG. 3), and extends along the inner arm 22b from the end facing the tip of the boom 21 to the tip of the outer arm 22a. The inside of the operating chamber 22R is a rectangular parallelepiped space extending along the inner arm 22b, and the folded portion 30c (described later) of the cable carrier 30 reciprocates in this space as the arm 22 expands and contracts.

Further, the bottom surface of the operating chamber 22R (the surface of the operating chamber 22R facing the radial direction of the outer arm 22a, whichever is closer to the inner arm 22b) is fully open to accommodate the space for accommodating the inner arm 22b. It is connected. The ceiling surface of the operating chamber 22R (the surface of the operating chamber 22R facing the radial direction of the outer arm 22a, which is farther from the inner arm 22b) is also fully open. The opening 22Ra on the ceiling surface of the operating chamber 22R is opened and closed by the cover 22Rc. The cover 22Rc is detachably attached to the side wall surfaces 22Rs (surfaces extending in the radial direction of the inner arm 22b) on both sides of the operating chamber 22R with, for example, bolts, and the inner arm sandwiches the internal space of the operating chamber 22R. Facing 22b.

The side wall surfaces 22Rs facing each other face the side surface of the cable carrier 30 and serve to guide both sides of the cable carrier 30 in the width direction. As shown in FIG. 9, there is no structure between the two side wall surfaces 22Rs of the operating chamber 22R and the cable carrier 30 interposed between them, and the side wall surface 22Rs is a cable carrier without passing through the structure. It approaches 30 and faces it.

Further, a plurality of inspection windows (not shown) arranged in the longitudinal direction of the inner arm 22b and an inspection window cover 22Rx for opening and closing the inspection windows 22Rs are provided on the side wall surface 22Rs of the operating chamber 22R. By removing the inspection window cover 22Rx and opening the inspection window, the inside of the operating chamber 22R (the state of the cable carrier 30 and the hydraulic hose 27b) can be confirmed.

-Cable carrier-
The arm 22 of the work machine 20 is provided with a cable carrier 30 that supports the hydraulic hose 27b (described later). The cable carrier 30 is folded back once in the middle, and in the present specification, the portion from the folded-back portion 30c to the proximal end 30a is the proximal end side strip 30A (referenced only in FIG. 3), and the folded-back portion 30c to the tip 30b. The portion is referred to as a tip side strip 30B (same as above). The cable carrier 30 is housed in the arm 22 with the folded-back portion 30c facing the attachment 23 side, and the base end 30a and the tip end 30b are detachably attached to the outer arm 22a and the inner arm 22b with bolts or the like. In the present embodiment, the base end 30a of the cable carrier 30 is connected to the inner wall of the boom side portion of the operating chamber 22R, and the tip 30b of the cable carrier 30 is connected to the outer peripheral surface of the base end side portion of the inner arm 22b. There is.

The distal strip 30B faces the outer peripheral surface of the inner arm 22b, and the proximal strip 30A faces the radial outer side of the inner arm 22b with respect to the distal strip 30B. That is, the base end side strip 30A and the tip end side strip 30B are housed in the arm 22 in a posture in which the cross section is extended in the circumferential direction of the outer arm 22a (the cross section is thin in the radial direction of the arm 22).

As the inner arm 22b moves back and forth with respect to the outer arm 22a, the folded-back portion 30c reciprocates inside the operating chamber 22R, and the lengths of the base end side band 30A and the tip side band 30B change. During this period, the folded portion 30c of the cable carrier 30 and the base end side strip 30A are always housed in the operating chamber 22R regardless of the position of the folded portion 30c, that is, the length of the base end side strip 30A.

On the other hand, when the arm 22 is contracted, the tip 30b of the cable carrier 30 exits the operating chamber 22R and moves to the boom side, and is between the outer arm 22a and the inner arm 22b (inside the outer arm 22a) together with a part of the tip side strip 30B. Enter the outside of the inner arm 22b). On the contrary, when the arm 22 is extended, the tip 30b of the cable carrier 30 moves to the attachment side. At least when the inner arm 22b protrudes maximum from the outer arm 22a, the tip 30b of the cable carrier 30 is located inside the operating chamber 22R, and the entire cable carrier 30 is configured to fit in the operating chamber 22R.

-Flood hose-
The hydraulic motors of the tilt cylinder 27 and the attachment 23 are connected to the hydraulic pump 2 (FIG. 1) and the hydraulic oil tank (not shown) via a plurality of hydraulic hoses 27b (only two are shown in FIGS. 8 and 9). It is driven by the pressure oil from the hydraulic pump 2 that has passed through the hydraulic hose 27b. The plurality of hydraulic hoses 27b are all passed through the cable carrier 30, supported by the cable carrier 30, and guided and protected. One end of the hydraulic hose 27b is at a position corresponding to the base end 30a of the cable carrier 30, and the other end is at a position corresponding to the tip end 30b of the cable carrier 30. One end of the hydraulic hose 27b is connected to a hydraulic circuit (not shown) connected to a hydraulic circuit mounted on the swivel body 12 via a swivel joint 28 (FIG. 3). The hydraulic pipe extending from the swivel joint 28 passes between the outer arm 22a and the inner arm 22b (inside the outer arm 22a and outside the inner arm 22b), and is fixed to, for example, the inner peripheral surface of the outer arm 22a so as not to interfere with the inner arm 22b. Has been done. The other end of the hydraulic hose 27b is connected to a hydraulic pipe (not shown) connected to the tilt cylinder 27 or the hydraulic motor of the attachment 23. The hydraulic pipes connected to these actuators pass through the inside of the inner arm 22b and are fixed to, for example, the inner peripheral surface of the inner arm 22b.

-Cable carrier attachment / detachment work-
FIG. 10 is a left side view showing a scene of the work of removing the cable carrier from the working machine, and FIG. 11 is a perspective view thereof. When removing the cable carrier 30 from the working machine 20, first, the boom cylinder 24 is driven to level the working machine 20 as shown in FIG. 1, and the motor 25 is driven so that the opening 22Ra of the operating chamber 22R faces upward. 22 is rotated. Then, as shown in FIG. 6, the telescopic cylinder 26 is extended to extend the arm 22 to, for example, the longest state, and the prime mover 1 (FIG. 1) is stopped. The boom cylinder 24, the motor 25, and the telescopic cylinder 26 can be operated in no particular order. By extending the arm 22, the tip 30b of the cable carrier 30 enters the inside of the operating chamber 22R, and by extending the arm 22 to the longest state, the tip 30b of the cable carrier 30 approaches the folded-back portion 30c (FIG. 6). .. In this state, the cover 22Rc is removed to open the opening 22Ra of the operating chamber 22R, and the entire cable carrier 30 is exposed to the opening 22Ra of the operating chamber 22R.

Next, accessing from the opening 22Ra, both ends of the hydraulic hose 27b are removed from the hydraulic pipe (not shown), and the base end 30a and the tip end 30b of the cable carrier 30 are removed from the outer arm 22a and the inner arm 22b. Then, when the slinging operation is performed as shown in FIGS. 10 and 11 (the wire W is hung on the cable carrier 30) and the cable carrier 30 is lifted by a crane, the cable carrier 30 and the hydraulic hose 27b are taken out from the working machine 20. The operations of removing the hydraulic hose 27b, removing the cable carrier 30, and slinging can be performed in no particular order.

The work of assembling the cable carrier 30 can be performed in the reverse procedure of the above.

-Comparative example-
FIG. 12 is a left side view of the working machine provided in the dismantling machine according to the comparative example, FIG. 13 is a plan view thereof, and FIG. 14 is a cross-sectional view taken along the line XIV-XIV in FIG. In the comparative examples shown in these figures, the outer arm Ao does not have an element corresponding to the operation chamber 22R of the present embodiment, and the cable carrier Cb is housed inside the inner arm Ai as shown in FIG. The cable carrier Cb is in a posture in which the folded portion is directed toward the base side (right side in FIG. 13) of the boom Bm, and the base end is attached to the inner wall of the outer arm Ao, for example, and the tip is attached to the inner wall of the inner arm Ai, for example.

In the case of the comparative example, since the cable carrier Cb has entered the inside of the inner arm Ai, it is necessary to remove the inner arm Ai from the outer arm Ao in order to attach and detach the cable carrier Cb. Therefore, a separate facility used for attaching / detaching the inner arm Ai is required, and the amount of work is large. Further, since the wall surface is along only one side of the cable carrier Cb in the width direction inside the inner arm Ai, the twist acting on the cable carrier Cb when gravity acts in the width direction of the cable carrier Cb in the posture as shown in FIG. The moment (see the arrow in FIG. 14) increases.

-Effect-
(1) According to the present embodiment, the operating chamber 22R located outside the inner arm 22b is provided in the outer arm 22a, and when the arm 22 is extended, the entire cable carrier 30 is accommodated in the operating chamber 22R. As a result, the cable carrier 30 can be taken out from the opening 22Ra of the operating chamber 22R opened by opening the cover 22Rc without removing the inner arm 22b and the outer arm 22a, and the cable carrier 30 and the hydraulic hose 27b can be maintained or replaced. it can. Since it is not necessary to attach / detach the inner arm 22b for maintenance of the cable carrier 30, the work man-hours can be significantly reduced, which can contribute to the improvement of the operating efficiency of the dismantling machine.

Further, since the opening 22Ra can be widely opened by removing the cover 22Rc of the operating chamber 22R, it is easy to inspect the inside of the working machine 20 from the opening 22Ra. Further, since the hydraulic hose 27b is housed inside the arm 22 as before, the hydraulic hose 27b can be effectively protected from obstacles and heat by the outer shell of the arm 22.

(2) Assuming that the cable carrier 30 is housed in the arm 22 in a posture in which the tip side band 30B and the base end side band 30A face each other in the circumferential direction of the inner arm 22b, the tip side band 30B has an outer arm in cross section. The posture is extended in the radial direction of 22a. In this case, in order to expand and contract the arm 22, the gap between the outer arm 22a and the inner arm 22b is made larger than the width of the tip side strip 30B (longitudinal dimension of the cross section), or the tip side strip 30B moves in and out. It is necessary to provide a space like a door pocket on the outer arm 22a. In these cases, since the turning radius of the outer arm 22a is increased in any case, the inner diameter of the boom 21 must be increased.

On the other hand, in the present embodiment, the cable carrier 30 is housed in the arm 22 in a posture in which the distal end side strip 30B and the proximal end side strip 30A face the radial outer side of the inner arm 22b, so that the distal end side strip 30B has a cross section. The outer arm 22a is extended in the circumferential direction. As a result, the tip side strip 30B can be moved in and out of the narrow gap between the outer arm 22a and the inner arm 22b without increasing the inner diameter of the outer arm 22a or providing the outer arm 22a with a door pocket. Therefore, it is possible to suppress an increase in the size of the working machine 20 while ensuring the above effect (1).

(3) Further, the side wall surfaces 22Rs of the operating chamber 22R are along both sides of the cable carrier 30 in the width direction. Therefore, for example, even if the arm 22 rotates 90 degrees and gravity acts in the width direction of the cable carrier 30 as shown in FIG. 7, the cable carrier 30 is excessively bent or twisted by being guarded by the side wall surface 22Rs. Never. The same applies when the arm 22 is rotated 90 degrees to the opposite side of FIG. 7.

(4) Since a plurality of inspection windows are provided in the operating chamber 22R, the inspection window cover 22Rx can be removed to inspect the parts inside the outer arm 22a.

10 ... Body, 21 ... Boom, 22a ... Outer arm, 22b ... Inner arm, 22R ... Operating chamber, 22Ra ... Opening, 22Rc ... Cover, 22Rs ... Side wall surface, 22Rx ... Inspection window cover, 23 ... Attachment, 27 ... Tilt cylinder ( Hydraulic actuator), 27b ... Hydraulic hose, 30 ... Cable carrier, 30a ... Base end, 30b ... Tip, 30c ... Folded part, 30A ... Base end side band, 30B ... Tip side band

Claims (4)

With the car body
The tubular boom connected to the car body and
A tubular outer arm supported by the boom so that it can rotate,
An inner arm that is supported so that it can enter and exit the outer arm,
The attachment connected to the inner arm and
With at least one hydraulic actuator driving the attachment,
A hydraulic hose through which pressure oil for driving the hydraulic actuator is passed, and
In a dismantling machine provided with a cable carrier that supports the hydraulic hose,
An operating chamber of a cable carrier located on the outside of the inner arm and formed on the outer arm so as to extend along the inner arm.
A cover for opening and closing an opening provided in the operating chamber so as to face the inner arm is provided.
The cable carrier is detachably attached to the outer arm and the inner arm at the base end and the tip end in a posture in which the folded portion is directed toward the attachment side.
When the inner arm protrudes maximum from the outer arm, the tip of the cable carrier attached to the inner arm is located inside the operating chamber, and the entire cable carrier is configured to fit in the operating chamber. A dismantling machine characterized by being In the dismantling machine according to claim 1, the base end side strip from the folded portion to the base end of the cable carrier is the tip side strip from the folded portion to the tip of the cable carrier. A dismantling machine characterized by facing the radial outside of the inner arm. The dismantling machine according to claim 1, wherein both sides of the cable carrier in the width direction are guided by the side wall surface of the operating chamber. The dismantling machine according to claim 1, wherein the operating chamber is provided with a plurality of inspection windows.

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