JP2019163645A - Shovel with hook - Google Patents

Abstract

To provide a shovel with a hook capable of suppressing adhesion of dust caused by an attachment work and smoothly performing a crane work.SOLUTION: A shovel with a hook of this invention comprises: a lower structure; an upper structure rotatably mounted on the lower structure; a boom attached to the upper structure so as to vertically swing; an arm connected to a tip portion of the boom so as to vertically swing; and an attachment attached to a tip portion of the arm, in which the arm is hollow shape having an opening in a lower face. The shovel with a hook further comprises: a pulley pivotally supported in a width direction at a tip side of the hollow portion of the arm; a winding machine provided at a rear end side of the hollow portion; a wire pulled out from the winding machine and suspended on the pulley; a hook portion attached to the wire and capable of being stored in the hollow portion in a winding state of the wire; and a cover capable of sealing the opening in a storing state of the hook portion.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a shovel with a hook.

  There is known a hydraulic excavator in which an upper swing body is mounted on a lower traveling body and a boom, an arm and a bucket are connected to the front side of the upper swing body. Further, as this hydraulic excavator, one having a hook for carrying out crane work has been proposed (see JP-A-9-125444).

JP-A-9-125444

  The shovel with a hook described in the above publication includes a winch on the lower side of the bucket arm, a wire drawn from the winch, a pulley that suspends the wire on the tip side of the bucket arm, and a hook block attached to the wire. Is provided.

  The shovel with a hook can perform crane work in addition to bucket work by having the above-described configuration.

  However, the above-mentioned shovel with a hook tends to get dust on a hook block, a winch or the like during a bucket operation or the like. Therefore, the above-described shovel with a hook is liable to cause problems such as turbulent winding of the wire due to the dust.

  This invention is made | formed based on such a situation, and it makes it a subject to provide the shovel with a hook which suppresses adhesion of the dust resulting from an attachment operation | work and can perform a crane operation | work smoothly.

  An excavator with a hook according to the present invention, which has been made to solve the above problems, is capable of swinging in a vertical direction on a lower traveling body, an upper swinging body that is turnably mounted on the lower traveling body, and the upper swinging body. A boom attached to the boom, an arm connected to the tip of the boom so as to be swingable in the vertical direction, and an attachment attached to the tip of the arm, the arm having a hollow shape having an opening on the lower surface. A pulley pivotally supported in the width direction of the distal end of the hollow portion of the arm, a hoist provided on the rear end side of the hollow portion, a wire drawn from the hoist and suspended on the pulley, and A hook portion attached to the wire and capable of being accommodated in the hollow portion when the wire is wound up, and a lid capable of sealing the opening when the hook portion is accommodated.

  In the shovel with a hook, a pulley and a hoisting machine are disposed in a hollow portion of an arm, and the hook portion can be accommodated in the hollow portion in a state of winding a wire. Since the shovel with a hook includes a lid that can seal the opening of the arm in the accommodated state of the hook portion, the hollow is caused by the attachment work by sealing the opening during the attachment work. It is possible to suppress dust from entering the part. Therefore, the shovel with a hook can suppress the adhesion of dust to the crane work unit due to the attachment work, and can smoothly perform the crane work.

  The hoisting machine may be disposed on a rear end side of a connecting portion of the arm with the boom. As described above, the hoisting machine is disposed on the rear end side of the connecting portion of the arm with the boom, so that dust can be easily and reliably prevented from adhering to the hoisting machine. Crane work can be performed more smoothly.

  The hook portion includes a hook body and a base that is disposed on a proximal end side of the hook body and regulates swinging of the hook body, the arm includes a sliding portion, and the sliding portion A portion is formed below the pulley, is inclined upward from the front end side to the rear end side of the arm, and is in contact with the upper surface of the base when the hook portion is accommodated and slides the base It is good to have a surface. Thus, the hook portion has a hook body and a base that is disposed on the base end side of the hook body and regulates the swinging of the hook body, and the arm has a sliding portion. The sliding portion is formed below the pulley, is inclined upward from the front end side to the rear end side of the arm, and comes into contact with the upper surface of the base when the hook portion is accommodated. By having an inclined surface to be slid, the hook portion can be easily and reliably accommodated in the hollow portion.

  The shovel with a hook may be further provided with a support plate that is provided so as to be able to protrude forward of the upper swing body and that supports a transported object suspended from the hook portion from below. As described above, the carrying object is hung on the hook part by further including a support plate that is provided so as to protrude forward from the upper swing body and supports the carrying object suspended from the hook part from below. It is possible to suppress the shaking of the transported object in the state. This facilitates the movement of the shovel with the hook when the transported object is suspended.

  The excavator with a hook has a base frame on which the lower traveling body is mounted with the upper swing body, and is disposed on the front side and the rear side of the base frame, and can protrude in the left-right direction; An outrigger connected to the tip of the frame may be further included. Thus, the lower traveling body has a base frame on which the upper revolving body is mounted, and is disposed on the front side and the rear side of the base frame, and can protrude in the left-right direction, and the frame By further including an outrigger connected to the tip of the excavator, it is possible to stabilize the posture of the shovel with hook during crane operation. As a result, it is possible to suppress overturning or the like of the shovel with hook during crane work.

  The shovel with a hook of the present invention can suppress the adhesion of dust due to the attachment work and can smoothly perform the crane work.

It is a typical side view showing an excavator with a hook concerning one embodiment of the present invention. It is typical sectional drawing which shows the hollow part of the arm of the shovel with a hook of FIG. It is a typical side view which shows the accommodation procedure of the hook part of the shovel with a hook of FIG. It is a typical side view which shows the accommodation procedure following the FIG. 3 of the hook part of the shovel with a hook of FIG. It is a typical side view which shows the shovel with a hook which concerns on embodiment different from the shovel with a hook of FIG. It is a typical side view which shows the shovel with a hook which concerns on embodiment different from the shovel with a hook of FIG.1 and FIG.5. FIG. 7 is a schematic plan view showing a lower traveling body and an outrigger of the shovel with hooks of FIG. 6.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[First embodiment]
<Excavator with hook>
The shovel with hook of FIG. 1 includes a lower traveling body 1, an upper revolving body 2 that is pivotably mounted on the lower traveling body 1, a boom 3 that is swingably attached to the upper revolving body 2 in an up and down direction, The arm 4 is connected to the tip of the boom 3 so as to be swingable in the vertical direction, and the attachment 5 is attached to the tip of the arm 4. The shovel with a hook is a hydraulic excavator capable of operating the boom 3, the arm 4, and the attachment 5 by the hydraulic cylinders 11, 13, and 15.

  As shown in FIG. 2, in the shovel with a hook, the arm 4 has a hollow shape having an opening 4a on the lower surface. The shovel with hook is pulled out from the pulley 6 pivotally supported in the width direction of the front end side of the hollow portion 4b of the arm 4, the hoisting machine 7 provided on the rear end side of the hollow portion 4b, and the pulley 6 A wire 8 suspended on the wire 8, a hook portion 9 that can be accommodated in the hollow portion 4 b when the wire 8 is wound up, and a lid 10 that can seal the opening 4 a when the hook portion 9 is accommodated. Prepare.

  The lower traveling body 1 has a pair of crawlers 1a and is configured to be able to travel on the road by driving a motor (not shown).

  The upper swing body 2 is disposed above the lower traveling body 1. The upper swing body 2 is provided with a driver's cabin at the front. The rear part of the upper swing body 2 accommodates an engine, a hydraulic pump (both not shown) and the like as a prime mover.

  The boom 3 is attached to the front part of the upper swing body 2. The boom 3 is configured to be swingable in the vertical direction in front of the upper swing body 2 by a hydraulic cylinder 11.

  The arm 4 is connected to the tip of the boom 3 by a pivot 12. The arm 4 is configured to be swingable in the vertical direction by a hydraulic cylinder 13. The arm 4 has a sliding portion 16 described later in the hollow portion 4b.

  The attachment 5 is connected to the tip of the arm 4 by a pivot 14. Examples of the attachment 5 include a bucket, a crusher, a breaker, a cutter, and a crusher. In this embodiment, a bucket is used. The attachment 5 is configured to be swingable in the vertical direction by a hydraulic cylinder 15.

  The lid 10 has a plate shape, for example. The lid 10 is configured to open the opening 4a before a crane operation and to seal the opening 4a after the crane operation by a known opening / closing mechanism (not shown) such as a slide mechanism using a guide rail.

(Crane work unit)
As described above, the arm 4 has a hollow shape having the opening 4a on the lower surface. The hollow portion 4b of the arm 4 is provided with a crane work unit for carrying out crane work. Hereinafter, the crane working unit will be described with reference to FIG.

<Sliding part>
The sliding part 16 is provided on the distal end side of the hollow part 4b. For example, the sliding part 16 has a U-shaped cross-sectional shape in plan view with both ends positioned on the rear side of the arm 4. The sliding portion 16 has a pair of side walls disposed on both sides of the arm 4 in the width direction, and a front wall that connects the end edges of the pair of side walls. A pulley 6 is connected to the inner surfaces of the pair of side walls of the sliding portion 16. The sliding portion 16 has an inclined surface 16 a formed below the pulley 6. The inclined surface 16a is formed on the lower surfaces of the pair of side walls. The inclined surface 16a is inclined upward from the front end side of the arm 4 toward the rear end side. The inclined surface 16a slides the base 9b of the hook part 9 mentioned later. The sliding portion 16 has a side surface 16b that is provided continuously with the rear end edge of the inclined surface 16a and rises upward. The side surface 16b is formed on the end surface on the rear side of the pair of side walls. Note that “inclined upward from the front end side of the arm toward the rear end side” means that the arm is placed horizontally and is directed upward from the front end side of the arm toward the rear end side with respect to the central axis of the arm. It is inclined to.

  The inclined surface 16a may be planar, or may be curved in an arch shape (an arch shape projecting downward) from the front end side to the rear end side of the arm 4. The lower limit of the inclination angle connecting the front end and the rear end of the inclined surface 16a with respect to the central axis of the arm 4 is preferably 45 ° and more preferably 50 °. If the tilt angle is smaller than the lower limit, it may be difficult to slide the base 9b. On the other hand, the upper limit of the inclination angle is preferably 85 °, for example, and more preferably 80 °. The inclined surface 16a is preferably configured such that the distance from the pulley 6 becomes shorter toward the rear end side so that the base 9b can be slid upward from below.

<Pulley>
The pulley 6 is connected to the inner surfaces of the pair of side walls of the sliding portion 16 so that the shaft is parallel to the width direction of the arm 4.

<Winding machine>
The winding machine 7 includes a winding drum 7a from which the wire 8 is drawn, and a hydraulic motor (not shown) that drives the winding drum 7a. The winder 7 is disposed on the rear end side of the opening 4a. Thereby, the said shovel with a hook has suppressed adhesion of the dust to the hoisting machine 7 during a crane operation.

  The hoisting machine 7 is preferably disposed on the rear end side of the connecting portion of the arm 4 with the boom 3. In other words, the hoisting machine 7 is preferably disposed on the rear end side with respect to the pivot 12. Thereby, the said shovel with a hook can suppress the adhesion of the dust to the winding machine 7 easily and reliably. As a result, the shovel with a hook can suppress the turbulent winding of the wire 8 due to the adhesion of dust to the hoisting machine 7, and the crane work can be performed more smoothly.

<Hook part>
The hook portion 9 includes a hook body 9a and a base 9b disposed on the base end side of the hook body 9a. The hook body 9a has a through hole at the base end. The base 9b has a space penetrating in the vertical direction, a first bar over which the wire 8 is bridged, and a second bar inserted into the through hole of the hook body 9a and supporting the hook body 9a. Have The axis of the first bar and the second bar is provided in parallel with the width direction of the arm 4. The second bar is disposed below the first bar. The upper surface 9c of the base 9b is provided horizontally. The length in the width direction of the upper surface 9c of the base 9b (the length in the width direction of the arm 4) is larger than the distance between the pair of side walls of the sliding portion 16. Further, the maximum length in the width direction of the base 9b is smaller than the length in the width direction of the hollow portion 4b. Thereby, the upper surface 9c of the base 9b abuts on the inclined surface 16a when the hook portion 9 is accommodated, and the hook portion 9 can be accommodated in the hollow portion 4b. The wire 8 may be stretched around the first bar only once, or the pulley 6 and the first bar may be wound two or more times. The base 9b regulates the swinging of the hook body 9a. The base 9b has a front wall and a rear wall that define the space, and the hook body 9a is supported by the second bar, and swings in the front-rear direction by the front wall and the rear wall. Be regulated.

(Crane work procedure)
Subsequently, a procedure for carrying out the crane work and a procedure for housing the hook part 9 in the hollow part 4b after the crane work will be described.

  When carrying out the crane work, the lid 10 is first moved to open the opening 4a. And the winding machine 7 is driven, the wire 8 is pulled out, and the hook part 9 is pulled down. Further, the work X is suspended from the hook body 9a to perform crane work.

  When the crane work is finished, the hoisting machine 7 is driven to raise the hook portion 9 upward. Thereby, as shown in FIG. 3, the upper surface 9 c of the base 9 b of the hook portion 9 abuts on the inclined surface 16 a of the sliding portion 16. Furthermore, when the winding machine 7 is driven to wind up the wire 8, the base 9b slides on the inclined surface 16a from below to above. Thereby, the hook part 9 is pulled upwards from the opening 4a and is accommodated in the hollow part 4b.

  Further, when the hoisting machine 7 is further driven, as shown in FIG. 4, the base 9b slides to the side surface 16b side of the sliding portion 16, and the upper surface 9c of the base 9b contacts the side surface 16b. Held in a state. Thereby, the hook part 9 is stably hold | maintained at the hollow part 4b in the state in which the hook main body 9a was fixed to the horizontal direction. Subsequently, after the hook portion 9 is accommodated in the hollow portion 4 b, the opening 4 a is sealed with the lid 10.

  As described above, the shovel with the hook has the hook portion 9 including the hook main body 9a and the base 9b that is disposed on the base end side of the hook main body 9a and restricts the swinging of the hook main body 9a. 4 has a sliding portion 16, and the sliding portion 16 is formed below the pulley 6, is inclined upward from the front end side to the rear end side of the arm 4, and the base 9 b is accommodated when the hook portion 9 is accommodated. The hook portion 9 can be easily and reliably accommodated in the hollow portion 4b by having the inclined surface 16a that contacts the upper surface of the base plate and slides the base 9b.

<Advantages>
As described above, the shovel with hook is configured such that the pulley 6 and the hoisting machine 7 are disposed in the hollow portion 4b of the arm 4, and the hook portion 9 can be accommodated in the hollow portion 4b when the wire 8 is wound up. ing. Since the shovel with the hook includes the lid 10 that can seal the opening 4a of the arm 4 in the accommodated state of the hook portion 9, the opening 4a is sealed during the attachment work, thereby causing the attachment work. It is possible to suppress dust from entering the hollow portion 4a. Therefore, the shovel with a hook can suppress the adhesion of dust to the crane work unit due to the attachment work, and can smoothly perform the crane work.

[Second Embodiment]
<Excavator with hook>
The shovel with a hook in FIG. 5 includes a support plate 21 that is provided in front of the upper swing body 2 and supports the transported object X suspended from the hook portion 9 from below. The shovel with hooks can have the same configuration as the shovel with hooks of FIG. Therefore, only the support plate 21 will be described below.

(Support plate)
The support plate 21 is disposed, for example, on the lower surface of the upper swing body 2. The support plate 21 is configured to protrude forward of the upper swing body 2. For example, the support plate 21 includes a plurality of plate materials and guide rails that connect these plate materials so as to be extendable in the front-rear direction. The widths of the plurality of plate members are not particularly limited as long as the support plate 21 can support a part of the transported object X from below and hold the transported object X on the support plate 21. .

<Advantages>
The shovel with a hook is provided so as to be able to protrude forward of the upper swing body 2 and further includes a support plate 21 that supports the transported object X suspended from the hook part 9 from below, and therefore the transported object X is mounted on the hook part 9. It is possible to suppress the shaking of the transported object X in the state where the container is suspended. Thereby, the movement of the shovel with the hook in the suspended state of the transported item X is facilitated.

[Third embodiment]
<Excavator with hook>
In the shovel with a hook in FIG. 6, the lower traveling body 31 has a base frame 31 a on which the upper swing body 2 is mounted, as shown in FIG. 7. The shovel with a hook is provided on the front side and the rear side of the base frame 31a, and includes four frames (extensible frame 32) that can project in the left-right direction, and an outrigger 33 connected to the tip of the extendable frame 32. . Specifically, the shovel with a hook is mounted with a pair of stretchable frames 32 that can be stretched in the left-right direction in front of the mounting portion of the upper swing body 2 of the base frame 31a, and the upper swing body 2 of the base frame 31a. On the rear side of the mounting portion, another pair of stretchable frames 32 that can be stretched in the left-right direction is mounted, and an outrigger 33 is connected to the tip of each stretchable frame 32. The shovel with hooks can be configured in the same manner as the shovel with hooks of FIG. 1 except that four telescopic frames 32 are disposed on the base frame 31a and the outriggers 33 are connected to the distal ends of these telescopic frames 32. it can. Therefore, only the base frame 31a, the telescopic frame 32, and the outrigger 33 will be described below.

(base frame)
The base frame 31a has a substantially disk shape or a substantially annular shape. The base frame 31a is disposed on a crawler frame (not shown) that supports the pair of crawlers 31b.

(Extensible frame)
The telescopic frame 32 has a built-in telescopic hydraulic cylinder, and is configured to be telescopic in the left-right direction by the hydraulic cylinder. The telescopic frame 32 rotates to hold the outrigger 33 in a contracted state with the shaft oriented in the horizontal direction and to rotate the outrigger 33 so that the outrigger 33 can be held in the extended state with the shaft oriented in the vertical direction. You may have a mechanism.

(Outrigger)
The outrigger 33 incorporates a hydraulic cylinder for expansion and contraction, and is configured to be expandable and contractable in the axial direction. The outrigger 33 is configured to be accommodated above the base frame 31a in a contracted state of the telescopic frame 32, for example, by being held in a state where the shaft is oriented in the horizontal direction by the above-described turning mechanism.

<Advantages>
The excavator with a hook is, for example, when carrying out a crane operation in a state where the upper revolving unit 2 is rotated 90 ° with respect to the traveling direction of the lower traveling unit 1, depending on the weight of the conveyed item X. There is a risk of falling. In this regard, in the excavator with a hook, the lower traveling body 31 has a base frame 31a on which the upper swing body 2 is mounted, and is disposed on the front side and the rear side of the base frame 31a and can protrude in the left-right direction. By providing the four telescopic frames 32 and the outriggers 33 connected to the distal ends of the telescopic frame frames 32, the posture during crane operation is stabilized. As a result, the shovel with a hook can suppress a fall during crane work.

[Other Embodiments]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is not limited to the configuration of the embodiment described above, but is defined by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims. The

  For example, the configuration of the hook portion is not limited to the configuration of the above embodiment. Moreover, the said shovel with a hook does not necessarily have the said sliding member as long as the said arm is comprised so that a hook part can be accommodated in the hollow part of an arm in the winding state of a wire.

  Even when the shovel with the hook includes an outrigger, the frame connected to the outrigger does not necessarily need to be stretchable.

  As described above, the shovel with a hook according to the present invention can suppress the adhesion of dust due to the attachment work and can smoothly perform the crane work.

DESCRIPTION OF SYMBOLS 1,31 Lower traveling body 1a, 31b Crawler 2 Upper revolving body 3 Boom 4 Arm 4a Opening 4b Hollow part 5 Attachment 6 Pulley 7 Winding machine 7a Winding drum 8 Wire 9 Hook part 9a Hook main body 9b Base 9c Upper surface 10 Lid 11, 13, 15 Hydraulic cylinders 12, 14 Axis 16 Sliding part 16a Inclined surface 16b Side surface 21 Support plate 31a Base frame 32 Extendable frame 33 Outrigger X

Claims (5)

A lower traveling body,
An upper revolving unit mounted to be capable of swiveling on the lower traveling unit;
A boom attached to the upper swing body so as to be swingable in the vertical direction;
An arm connected to the tip of the boom so as to be swingable in the vertical direction;
An attachment attached to the tip of the arm, and
The arm has a hollow shape having an opening on the lower surface,
A pulley pivotally supported in the width direction of the distal end of the hollow portion of the arm;
A winder provided on the rear end side of the hollow part;
A wire drawn from the hoist and suspended on the pulley;
A hook portion that is attached to the wire and can be accommodated in the hollow portion in a wound state of the wire;
A shovel with a hook, comprising: a lid capable of sealing the opening while the hook portion is housed.   The shovel with a hook according to claim 1, wherein the hoisting machine is disposed on a rear end side of a connection portion between the arm and the boom. The hook portion has a hook body and a base that is disposed on the base end side of the hook body and restricts the swinging of the hook body,
The arm has a sliding portion;
The sliding portion is formed below the pulley, is inclined upward from the front end side to the rear end side of the arm, contacts the upper surface of the base when the hook portion is received, and slides the base. The shovel with a hook of Claim 1 or Claim 2 which has an inclined surface to move.   The shovel with a hook according to claim 1, 2 or 3, further comprising a support plate that is provided so as to protrude forward of the upper swing body and supports a transported object suspended from the hook portion from below. . The lower traveling body has a base frame on which the upper swing body is mounted;
5. The apparatus according to claim 1, further comprising four frames disposed on the front side and the rear side of the base frame and capable of protruding in the left-right direction, and an outrigger connected to a front end portion of the frame. Excavator with hook as described in.

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