JP2008272648A - Demolition machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a demolition machine capable of easily suppressing the total height of a boom within the limit of a vehicle height without detaching a guard device upon transportation of the boom. <P>SOLUTION: The boom prepared by successively connecting a plurality of boom elements is connected to the demolition machine having a cab, and a crusher (operation attachment) is attached to the tip of the boom. The guard device 20 for preventing pieces crushed by the crusher from dropping to the cab is disposed on the back surface side of a fourth boom body 9 among the boom bodies. The guard device 20 is constituted so as to be freely switchable between an operational posture A erected for the back surface of the fourth boom body 9 and a transportation posture falling to the back surface side of the fourth boom body 9. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a dismantling machine in which a work attachment is attached to the tip of a boom.

  Conventionally, a demolition machine has been known in which a long boom and an arm are connected to the front part of a hydraulic excavator, and a work attachment such as a crusher is attached to the tip of the arm to perform demolition work such as building demolition. (For example, refer to Patent Document 1).

In this dismantling machine, a stopper plate (guard device) is disposed on the back side of the long boom or arm, a non-metallic elastic plate material is attached to the upper surface of the stopper plate, and the stopper plate is attached to the cab (cab) of the excavator. ) Inclined and attached to the side of the hydraulic excavator on the opposite side from the installation position, and when the crusher performs crushing work, the shredded pieces that fall on the stopper plate are further removed from the stopper plate. The hydraulic excavator is bounced and dropped to the side opposite to the cab position of the excavator.
Japanese Utility Model Publication No. 4-12547

  By the way, according to the Road Traffic Law Enforcement Ordinance (enforced from March 1, 2004), the vehicle height when the automobile is running is limited to 4.1 m.

  When transporting the dismantling machine, the boom is usually removed from the dismantling machine and mounted on the carriage of the transporting vehicle. At this time, the guard device provided on the rear surface of the boom protrudes most upward. For this reason, in order to prevent the transportation limit from being exceeded during transportation of the boom, it is necessary to remove the guard device, and there is a problem that it takes time to transport and assemble the boom.

  The present invention has been made in view of the above points, and the object of the present invention is to easily devise the boom by easily devising the structure of the guard device without removing the guard device during boom transportation. The overall height of the vehicle should be kept within the vehicle height limit.

  In order to achieve the above object, in the present invention, the guard device is configured to be switchable between a working posture standing with respect to the rear surface of the boom and a transport posture falling to the rear surface side of the boom.

  Specifically, the first invention is based on a dismantling machine having a cab in which a work attachment is attached to the tip of a boom.

And, on the back side of the boom in the dismantling machine, a guard device is provided to prevent the fragments from the work attachment from falling on the cab,
The guard device is configured to be switchable between a working posture standing with respect to the rear surface of the boom and a transport posture falling to the rear side of the boom.

  According to the above configuration, at the time of dismantling work, the guard device is held in a working posture standing with respect to the rear surface of the boom, and even if a shredded piece generated by the dismantling work by the work attachment falls, it falls on the cab by the guard device. Is prevented. On the other hand, when the boom is transported, the guard device is held in a transport posture that falls to the back side of the boom, so that the overall height of the boom is suppressed. For this reason, the time of transportation of a boom is performed, without removing a guard apparatus at the time of transportation.

In the second invention, in the first invention,
The guard device is
A base fixed to the back of the boom;
A movable part that can be raised and lowered around a rotation axis provided in the base part;
And a positioning pin for positioning and fixing the movable portion in the working posture or the transporting posture.

  According to said structure, a guard apparatus is switched to a working attitude | position and a transport attitude | position by raising / lowering a movable part centering on the rotating shaft provided in the base part. Since the movable portion and the base portion are positioned at a predetermined position and fixed to each other by the positioning pin, the movable portion is securely held at the predetermined position, and does not wobble even when the crushed pieces come into contact with each other during the work. During transportation, it will not wobble due to vibration caused by running.

In the third invention, in the second invention,
A plurality of reinforcing ribs extending from the tip side to the rotating shaft side are provided on the back side of the movable part,
The reinforcing rib is formed with an extension extending from the rotating shaft to the back side of the boom,
The base portion is formed with a first abutting portion with which the extension portion abuts in the working posture and a second abutting portion with which the extending portion abuts in the transport posture.

  According to the above configuration, the strength of the guard device can be maintained by providing the plurality of reinforcing ribs extending from the tip side to the rotating shaft side on the back side of the movable part, and this allows the shredded pieces in the guard device to be applied. The plate thickness of the plate member in contact with the plate member can be reduced. For this reason, the mass of a guard apparatus becomes light. In addition, since the extension portion of the reinforcing rib contacts the first contact portion of the base portion in the working posture and contacts the second contact portion of the base portion in the transport posture, the movable range of the movable portion can be changed between the work posture and the transport posture. Regulated between postures. This facilitates positioning when switching to the working posture or the transport posture. Moreover, since the movable part does not wobble even when the crushed pieces come into contact with each other, the strength of the guard device is improved. Furthermore, during transportation, the movable part does not wobble due to vibration caused by traveling, and the rotation part of the movable part is restricted by the extension part coming into contact with the second contact part. It will not be damaged by coming into contact with piping or harnesses.

In the fourth invention, in the third invention,
The reinforcing rib is formed with a working through hole through which the positioning pin is inserted in a working posture and a transport through hole through which the positioning pin is inserted in a transport posture.
The base portion is formed with a pin insertion hole through which the positioning pin is inserted in the working posture and the transport posture.

  According to the above configuration, the movable portion is securely attached to the base portion by inserting the positioning pin through the working through hole of the reinforcing rib abutted against the first abutting portion and the pin insertion hole of the base portion. It is fixed and the guard device becomes the working posture. Further, by inserting the positioning pin into the transporting through hole of the reinforcing rib brought into contact with the second contact part and the pin insertion hole of the base part, the movable part is securely fixed to the base part and guarded. The device is in a transport position. In this way, the guard device is easily positioned by inserting the positioning pin into the predetermined position, and the posture is switched.

In a fifth invention, in any one of the second to fourth inventions,
On the back side of the movable part, a grip part is formed which is gripped when the movable part is switched to the working posture or the transport posture.

  According to the above configuration, when the movable portion is switched to the working posture or the transport posture, the posture of the movable portion can be easily switched by human power by grasping the grip portion provided on the back surface thereof.

In a sixth invention, in any one of the first to fifth inventions,
The boom is connected to a front portion of a hydraulic excavator so as to be raised and lowered.

  According to the above configuration, since the excavator can travel, the dismantling work is performed by moving to an optimum position with respect to the dismantling object.

  As described above, according to the first aspect of the invention, the guard device is held in a working posture standing with respect to the back surface of the boom at the time of dismantling work, and is brought into a transport posture that falls to the back side of the boom at the time of transporting the boom. I try to keep it. For this reason, the entire height of the boom can be easily kept within the vehicle height limit without removing the guard device during the boom transportation, so that the transportation work can be performed very easily.

  According to the second aspect of the invention, the movable portion is raised and lowered around the rotation shaft provided on the base portion, and the positioning pin is inserted into the predetermined position, thereby reliably switching to the working posture or the transport posture. For this reason, at the time of the attitude | position switching of a guard apparatus, a movable part can be fixed to a predetermined position reliably and easily.

  According to the said 3rd invention, weight reduction of a guard apparatus can be achieved by providing a some reinforcement rib in the back side of a movable part. Further, the movable range of the movable portion is regulated by bringing the extension portion of the reinforcing rib into contact with the first contact portion of the base portion in the working posture and contacting the second contact portion in the transport posture. . For this reason, positioning is easily performed when switching to a work posture or a transport posture, and the movable part can be securely fixed during work to prevent wobbling and strength can be improved. And the harness can be easily prevented from being damaged.

  According to the fourth aspect of the invention, the positioning pin is inserted into the pin insertion hole of the base portion and the work through hole of the reinforcing rib in the working posture, and for transporting the pin insertion hole of the base portion and the reinforcing rib in the transport posture. It is inserted into the through hole. For this reason, in any posture, by changing the position of the positioning pin, the movable portion can be reliably fixed at a predetermined position of the base portion, so that positioning is easy and posture switching can be performed efficiently.

  According to the fifth aspect of the invention, the gripping portion provided on the back surface of the movable portion is grasped, and the movable portion is switched to the working posture or the transport posture. For this reason, since the posture of the movable part can be switched by human power without using a crane, the posture switching of the guard device can be performed very easily.

  According to the sixth aspect of the present invention, the boom is connected to the front portion of the hydraulic excavator so that it can be raised and lowered, so that it can be moved to an optimum position with respect to the object to be dismantled, and the dismantling work can be performed efficiently.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 2 shows a dismantling machine 1 according to an embodiment of the present invention, and the main body of the dismantling machine 1 is composed of a hydraulic excavator 2. The front portion 3 of the excavator 2 is provided with a cab 4 into which a driver enters, and a boom 5 is connected to a side mounting portion (not shown) of the cab 4. The boom 5 includes a long boom in which a plurality of first to fourth boom bodies 6 to 9 are sequentially connected. A first boom cylinder 10 is connected to the first boom body 6 and the front portion 3 on the base end side, and the boom 5 is configured to be freely raised and lowered by the first boom cylinder 10. A fifth boom body 11 is connected to the fourth boom body 9 at the distal end of the long boom by a second boom cylinder 12 so as to be raised and lowered. An arm 13 is connected to the tip of the fifth boom body 11 by a third boom cylinder 14 so as to be raised and lowered.

  A crusher 15 as a work attachment is attached to the tip of the arm 13 by an attachment cylinder 16 so as to be raised and lowered. The crusher 15 may be hydraulic or electric.

  As shown in FIGS. 1 to 6, a guard device 20 is provided on the back side of the fourth boom body 9 to prevent shredded pieces from the crusher 15 from falling on the cab 4. As a feature of the present invention, the guard device 20 is configured to be switchable between a work posture A that stands up with respect to the back surface of the fourth boom body 9 and a transport posture B that falls to the back surface side of the fourth boom body 9. (Bold symbols A and B are attached to each figure). The guard device 20 is attached so as to be inclined downward toward the side (right side) of the excavator 2 when viewed from the back of the fourth boom body 9 (see FIG. 6). Note that the guard device 20 may be provided in any one of the first to third boom bodies 6 to 8 instead of the fourth boom body 9.

  The guard device 20 includes a base portion 21 that is fixed to the back surface of the fourth boom body 9. As shown also in FIG. 7, the base portion 21 includes a base main body 22 in which a steel plate is curved, and a mounting bracket 23 provided on the central back side of the base main body 22. The mounting bracket 23 is configured by welding substantially the same shape steel plate so as to be inclined with respect to the base body 22 in a plan view. The mounting bracket 23 is formed with a fastening hole 23a for fastening the bolt 50 to a mounting portion 9a (shown in FIGS. 3 and 6) protruding from the back surface of the fourth boom body 9. The base body 22 is formed with a through hole 23b for weight reduction and lifting. The guard device 20 is fixed to the back surface of the fourth boom body 9 by inserting the bolt 50 through the fastening hole 23a of the mounting bracket 23 and the through hole (not shown) of the mounting portion 9a and fastening the nut 51. ing.

  A connecting bracket 24 is provided on the front end side of the base main body 22 with a space left and right. Each of the connecting brackets 24 is formed by welding two steel plates having the same shape to the base body 22, and a pin insertion hole 25 through which a positioning pin 35 described later is inserted is formed at the distal end side.

  A hydraulic pipe 52 and an electrical harness (not shown) extend on the back surface of the fourth boom body 9 (omitted for simplification in FIGS. 2 and 6). In order to avoid these hydraulic pipes 52 and electric harnesses, interference prevention openings 22a are formed on the left and right of the base-side mounting bracket 23 on the base side.

  A hollow base side pipe 22b is welded to the upper middle portion of the base body 22. A rotating shaft 26 is inserted into the base side pipe 22b. The movable portion 30 is supported on the rotary shaft 26 so as to be raised and lowered.

  The movable part 30 includes a plate-like movable part main body 31. The movable part main body 31 is formed by bending the front end side of a horizontally long steel plate upward, and a hollow movable side pipe 31a having the same size as the base side pipe 22b so as to sandwich the base side pipe 22b on both sides of the lower end part thereof. Are welded. The rotating shaft 26 is prevented from being detached by inserting the split pins 26a at both ends thereof while being inserted into the base side pipe 22b and the movable side pipe 31a. First to third reinforcing ribs 32 to 34 extending from the distal end side to the rotating shaft 26 side are provided on the back side of the movable portion main body 31. By providing the first to third reinforcing ribs 32 to 34 on the back side of the movable part 30, the strength of the guard device 20 is maintained, and the thickness of the movable part main body 31 can be reduced. . For this reason, the mass of the guard apparatus 20 is light.

  The first to third reinforcing ribs 32 to 34 are formed with extensions 32a to 34a extending from the rotary shaft 26 to the back side of the fourth boom body 9, respectively. The first and second extension portions 32 a and 33 a on both the left and right sides are arranged so as to be inserted into the connecting bracket 24. In the first and second extension portions 32a and 33a, a work through hole 36 into which a positioning pin 35 for positioning the movable portion 30 in the work posture A or the transport posture B is inserted and the transport through hole 37 are spaced from each other. Are lined up. The positioning pin 35 has a hook at one end, and is prevented from coming off by inserting a spring pin 35a at the other end.

  The upper center portion of the base main body 22 constitutes a first contact portion 38 with which the extension portion 34a of the center third reinforcing rib contacts in the working posture A. The connecting bracket 24 is welded with a plate-like second abutting portion 39 in which the first and second extending portions 32a and 33a on both the left and right sides abut in the transport posture B. The first abutting portion 38 is configured by a part of the base main body 22, but may be configured by welding a block or the like at that position.

  Between each of the first to third reinforcing ribs 32 to 34 of the movable portion main body 31, a grip portion 40 is formed that is gripped when the movable portion 30 is switched to the working posture A or the transport posture B. The gripping portion 40 is formed by bending a round steel bar and welding it to the movable portion main body 31.

-Action-
Next, the operation of the guard device according to this embodiment will be described.

  First, in the disassembling work shown in FIG. 2, the guard device 20 is fixed to a working posture A that stands up with respect to the back surface of the fourth boom body 9 shown in FIGS. When performing the dismantling work, the excavator 2 is moved to move to an optimum position with respect to the dismantling object such as a building.

  In the working posture A, the positioning pin 35 is inserted into the pin insertion hole 25 of the base portion 21 and the working through hole 36 of the reinforcing rib, and the movable portion 30 is securely fixed to the base portion 21. Even if the shredded pieces generated by the dismantling work by the crusher 15 fall, the guard device 20 is attached so as to be inclined downward toward the side of the hydraulic excavator 2, so that the shredded pieces are attached to the cab. 4 is prevented from falling. For this reason, the driver in the cab 4 is not intimidated by the falling sound or the like caused by the fragments. Moreover, since the movable part 30 is fixed reliably by the positioning pin 35, even if a crushing piece contacts, it does not wobble.

  On the other hand, as shown in FIG. 8, when transporting the dismantling machine 1, the boom 5 is disassembled, and the third to fifth boom bodies 8, 9, 11 and the arm 13 are mounted on the chassis 61 of the transport vehicle 60. 62. At this time, the guard device 20 is disposed on the uppermost side, and if it remains as it is, it may be caught in transportation restrictions. Therefore, the guard device 20 is switched to the transport posture B and transported.

  In order to change the guard device 20 from the working posture A to the transport posture B, first, the spring pins 35 a are removed from the positioning pins 35.

  Next, holding the gripping part 40, the positioning pins 35 are extracted from the working through hole 36 and the pin insertion hole 25, and the movable part 30 is rotated around the rotary shaft 26 to the back side (front end side) of the fourth boom body 9. The extension portions 32a and 33a of the first and second reinforcing ribs 32 and 33 are brought into contact with the second contact portion 39 on the base portion 21 side. Accordingly, the movable unit 30 can be easily positioned in the transport posture B, so that the hand can be released from the grip unit 40. In this state, the positioning pin 35 is inserted into the transport through hole 37 and the pin insertion hole 25 and is prevented from being detached by the spring pin 35a. In this way, switching to the transport posture B is easily performed manually without using a crane. At this time, since the first and second extension portions 32 a and 33 a are in contact with the second contact portion 39, the rotation range of the movable portion 30 is restricted, so that the movable portion 30 is the back surface of the fourth boom body 9. It will not be damaged by coming into contact with piping or harnesses.

  In this way, when the boom 5 is transported, the guard device 20 is held in the transport posture B that has fallen to the back side of the fourth boom body 9, and the overall height of the boom 5 is suppressed, so that the guard device 20 is not removed during transport. The boom 5 is transported. Moreover, since the movable part 30 and the base part 21 are mutually fixed by the positioning pin 35, it does not shake by the vibration by driving | running | working at the time of transport.

  Conversely, when assembling the boom 5 again after transportation, the guard device 20 is returned from the transportation posture B to the working posture A. Also in this case, the positioning pin 35 is similarly extracted from the transport through hole 37 and inserted into the work through hole 36. At this time, since the extended portion 34a of the third reinforcing rib 34 contacts the first contact portion 38 of the base portion 21, the movable portion 30 is easily positioned at a fixed position. It can be inserted into the working through hole 36 and the pin insertion hole 25.

-Effect of the embodiment-
Therefore, according to the dismantling machine 1 according to the present embodiment, the guard device 20 is held in the working posture A that stands up with respect to the back surface of the fourth boom body 9 during disassembly work, and the fourth boom body 9 during transportation of the boom 5. It is held in the transport posture B that has fallen to the back side. For this reason, since the total height of the boom 5 can be easily kept within the vehicle height limit without removing the guard device 20 during the transportation of the boom 5, the transportation work can be performed very easily.

  The movable portion 30 is raised and lowered around the rotating shaft 26 provided on the base portion 21 and the positioning pin 35 is inserted into a predetermined position, so that the working posture A or the transport posture B is surely switched. For this reason, the movable part 30 can be fixed to a predetermined position reliably and easily at the time of attitude | position switching of the guard apparatus 20. FIG.

  By providing the plurality of reinforcing ribs 32 to 34 on the back side of the movable portion 30, the weight of the guard device 20 can be reduced. Further, the extending portions 32a to 34a of the reinforcing rib are brought into contact with the first contact portion 38 of the base portion 21 in the working posture A, and are brought into contact with the second contact portion 39 in the transport posture B, thereby moving the movable portion. 30 movable ranges are regulated. As a result, the movable part 30 can be securely fixed during work to suppress wobble and improve strength, and the piping and harness on the back of the fourth boom body 9 can be easily prevented from being damaged during transportation. Can do.

  The positioning pin 35 is inserted through the pin insertion hole 25 of the base portion 21 and the work through hole 36 of the reinforcing rib in the working posture A, and the pin insertion hole 25 of the base portion 21 and the through hole for transportation of the reinforcing rib in the transport posture B. It is inserted into the hole 37. For this reason, since the movable part 30 can be reliably fixed to the base part 21 by changing the position of the positioning pin 35 in any posture, positioning is easy and posture switching can be performed efficiently.

  The gripping part 40 provided on the back surface of the movable part 30 is grasped, and the movable part 30 is switched to the work posture A or the transport posture B. For this reason, since the attitude | position of the movable part 30 is easily switched by human power, without using a crane, the attitude | position switching of the guard apparatus 20 can be performed very easily.

  By connecting the boom 5 to the front part 3 of the hydraulic excavator 2 so as to be raised and lowered, the boom 5 can be moved to an optimum position with respect to the object to be dismantled and efficiently disassembled.

(Other embodiments)
The present invention may be configured as follows with respect to the above embodiment.

  That is, in the above embodiment, the boom 5 is connected to the front part 3 of the hydraulic excavator 2 so as to be raised and lowered. However, the boom 5 may be connected to the front part 3 of the crawler crane so as to be raised and lowered. Or, it may be connected to the front part of a revolving frame such as a climbing crane.

  In the above embodiment, the grip portion 40 is provided between the reinforcing ribs 32 to 34 on the back surface side of the movable portion 30, but an opening into which an operator's hand is inserted may be provided in any of the reinforcing ribs 32 to 34. Good.

  In the said embodiment, although the example of the structure of the boom 5 was shown, the number of this 1st-4th boom bodies 6-9 is not limited to four, It may be more or less than that, You may be comprised by one. Further, the arm 13 may be attached to the fourth boom body 9 without using the fifth boom body 11.

  In addition, the above embodiment is an essentially preferable illustration, Comprising: It does not intend restrict | limiting the range of this invention, its application thing, or a use.

It is a perspective view which expands and shows the working attitude | position of the guard apparatus concerning embodiment of this invention. It is a side view which shows the whole demolition machine. It is a perspective view which expands and shows the transport attitude | position of a guard apparatus. It is a side view which expands and shows the working posture of a guard apparatus. It is a side view which expands and shows the transport attitude | position of a guard apparatus. It is a top view which expands and shows the working posture of a guard apparatus. It is a rear view which expands and shows a base part. It is a side view which shows the conveyance attitude | position of a boom.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Demolition machine 2 Hydraulic excavator 3 Front part 4 Cab 5 Boom 15 Crusher (work attachment)
DESCRIPTION OF SYMBOLS 20 Guard apparatus 21 Base part 26 Rotating shaft 30 Movable part 32 1st reinforcement rib 33 2nd reinforcement rib 34 3rd reinforcement rib 32a-34a Extension part 35 Positioning pin 36 Work through-hole 37 Transport through-hole 38 1st contact Part 39 second contact part 40 gripping part

Claims (6)

In a demolition machine with a cab, with a work attachment attached to the tip of the boom,
A guard device is provided on the back side of the boom to prevent a fragment from the work attachment from falling on the cab.
The dismantling machine, wherein the guard device is configured to be switchable between a working posture standing with respect to the rear surface of the boom and a transport posture falling to the rear side of the boom. The dismantling machine according to claim 1,
The guard device is
A base fixed to the back of the boom;
A movable part that can be raised and lowered around a rotation axis provided in the base part;
A dismantling machine comprising: a positioning pin that positions and fixes the movable portion in the work posture or the transport posture. The dismantling machine according to claim 2,
A plurality of reinforcing ribs extending from the tip side to the rotating shaft side are provided on the back side of the movable part,
The reinforcing rib is formed with an extension extending from the rotating shaft to the back side of the boom,
The dismantling machine, wherein the base portion is formed with a first contact portion with which the extension portion contacts in the work posture and a second contact portion with which the extension portion contacts in the transport posture. The dismantling machine according to claim 3,
The reinforcing rib is formed with a working through hole through which the positioning pin is inserted in a working posture and a transport through hole through which the positioning pin is inserted in a transport posture.
The dismantling machine according to claim 1, wherein a pin insertion hole through which the positioning pin is inserted in the working posture and the transporting posture is formed in the base portion. The dismantling machine according to any one of claims 2 to 4,
A demolition machine characterized in that a gripping part is formed on the back side of the movable part so as to be gripped when the movable part is switched to the working posture or the transporting posture. The dismantling machine according to any one of claims 1 to 5,
The dismantling machine, wherein the boom is connected to a front part of a hydraulic excavator so as to be raised and lowered.

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