JP2004238874A - Turning type grip device mounted to power shovel or crane - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a turning type grip device mounted to a power shovel or a crane easily stoppable in a direction desired by an operator when turning the grip device while preventing high speed rotation more than necessary. <P>SOLUTION: This turning type grip device mounted to the power shovel or crane is provided with a solenoid valve 34 on the grip mechanism side for selectively switching to supply operating oil for gripping or turning to either a grip mechanism or a grip mechanism turning motor 35; a cab side switch 33 for switching the solenoid valve 34 to either gripping or turning; hydraulic piping 38 for an attachment provided at the power shovel or crane, for connecting the body side to the grip mechanism side; and an attachment pedal 37 for controlling the attachment. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a swing type gripper (attachment) mounted on a power shovel or a crane.
[0002]
[Prior art]
BACKGROUND ART Conventionally, a power shovel with a rotary bucket device having gripping and turning functions has been proposed (for example, see Patent Document 1). This rotary bucket device is equipped with an open / close gripping mechanism operated by a hydraulic cylinder in the bucket and a hydraulic motor capable of rotating the bucket itself freely by 360 °, for excavation of land, gripping / transporting of concrete blocks, etc. Demonstrating great power. This rotary bucket device is provided with a so-called swivel joint in the vicinity of the axis in order to be able to rotate freely by 360 °, and adopts a configuration in which hydraulic pressure is supplied to a hydraulic cylinder for driving the opening / closing gripping mechanism via this. .
[Patent Document 1]
Patent No. 289802
[0003]
That is, FIG. 6 is a plan view showing the hydraulic bucket driving device disclosed in Patent Document 1. The device shown in FIG. 6 includes an upper turning portion and a traveling device including an engine serving as a prime mover, a hydraulic device such as a hydraulic pump, a hydraulic motor, and a hydraulic cylinder, a turning device, an operating device, and various other accessory devices. Hydraulic operation valves comprising a lower turning portion (not shown) and a main body operation valve [swing] 1 and a main body operation valve [bucket] 2 are provided, and a magnet valve 1 'connected to these operation valves 1 and 2 is provided. And a magnet valve 2 '. These magnet valves 1 ', 2' are electrically connected to a work switch [open / close] 4 'and a work switch [rotation] 5' disposed on the main body operation levers 4 and 5 by a transmission line 3 via a switchboard 11. are doing. A work rotating motor 7 'and a work rotary joint [opening / closing cylinder] 8' are connected via a piping box 10 and a swivel joint 9 to an oil passage provided in the magnet valves 1 'and 2' by an oil feed pipe 6. . Further, an electric circuit and a hydraulic circuit, which connect the main body turning motor 7 and the oil passage provided in the magnet valve 1 'and connect the main body bucket cylinder 8 and the oil passage provided in the magnet valve 2', are mounted on the upper part. It is provided in the turning part. In this device, pressure oil is supplied to a proper position at appropriate times to move the spools of the magnet valves 1 'and 2', that is, the spool valve to form a desired flow path, and a main body turning motor 7 as a hydraulic device on the vehicle main body side. In order to be able to move a driven body such as a work turning motor 7 'as a hydraulic device on the bucket side, a main body bucket cylinder 8 as a hydraulic device on the vehicle body side, and a work bucket opening / closing cylinder 8' as a hydraulic device on the bucket side. I have.
[0004]
[Problems to be solved by the invention]
However, such a conventional rotary bucket device is epoch-making in that it enables grasping and rotation by a bucket as compared with a conventional excavator having only a digging / transporting function, It had the following problems. That is, in the above-described conventional rotary bucket device, both the rotation operation of the power shovel body and the rotation operation of the bucket are performed by the driver manually operating the operation lever, so that the operation method becomes complicated, Unskilled drivers were confused in operation. In addition, since the operation method is fundamentally different from the operation method of conventional general-purpose attachments such as breakers, forks, grapples, crushers, steel cutting cutters, long-term skill is required for drivers to become accustomed to the operation method Met.
[0005]
Further, the above-described conventional rotary bucket device includes a hydraulic pipe for supplying hydraulic oil to a drive mechanism of the movable bucket for gripping, and a hydraulic pipe for supplying hydraulic oil to the bucket turning motor. Since a special arrangement is provided separately from a hydraulic pipe for supplying hydraulic oil to the drive mechanism of the excavating bucket, the configuration of the entire hydraulic pipe is complicated and the cost of the apparatus is increased.
[0006]
Further, when the conventional rotary bucket device described above is turned by a hydraulic motor, the turning mechanism is in a free turning state because there is no brake mechanism, it is difficult to stop in a direction desired by the driver, and the deceleration function is also difficult. Since it does not exist, there is a problem that the vehicle turns faster than necessary. In addition, when performing heavy excavation or grabbing a heavy object to move at an angle other than horizontal, even if a small amount of load is applied to the rotating part of the bucket, it can easily move to the left or right, and it may move dangerously Yes, there was a problem that it took time and effort to return to the position before moving again (thus, at least a function that could achieve the basic work purpose of excavator original excavation was required) .
[0007]
The present invention has been made in view of such problems of the prior art, and is a method of operating a normal (only having excavation function) bucket excavator or crane having no gripping and turning functions. A power shovel or crane can be operated with a feeling similar to that of a power shovel or a crane, and the operation method for gripping and turning the rotary bucket device is simple and does not require long-term skill to become accustomed to the operation. It is an object of the present invention to provide a turning rotary bucket device.
[0008]
In addition, the present invention uses a hydraulic pipe for attachment (a common reciprocating pipe such as a breaker and a rotary fork pipe) that connects between a main body side and a bucket side provided in a conventional power shovel or crane, thereby enabling rotation. An object of the present invention is to provide a rotary bucket device for gripping and turning a power shovel or a crane, which can simplify and reduce the cost of a hydraulic pipe for a mold bucket device.
[0009]
Furthermore, the present invention makes it possible to easily stop the rotary bucket device in the direction desired by the driver when turning, so that the rotary bucket device does not rotate at a high speed more than necessary, or perform heavy excavation or grab heavy objects. It is an object of the present invention to provide a rotary buckle device for gripping and turning a power shovel or a crane which can easily prevent a bucket from moving with a cradle even when performing an operation with an angle other than horizontal. .
[0010]
[Means for Solving the Problems]
A pivoting gripper for mounting a power shovel or crane according to the present invention for solving such a problem of the prior art is a pivoting gripper for mounting a power shovel or crane, and includes an arm tip of the power shovel or crane. A gripping mechanism for gripping an object, a gripping mechanism turning motor attached to the gripping mechanism, for rotating the gripping mechanism, and a gripping operation mechanism provided on the gripping mechanism side. Or, a gripping mechanism side electromagnetic valve for switching the supply destination of the hydraulic oil for turning operation to either the gripping mechanism or the gripping mechanism turning motor, and a breaker / rotation provided in advance on the main body side of the power shovel or crane. The reciprocating common piping for attachments such as forks and the operation cab provided in the cab on the body side of the power shovel or crane An attachment pedal for supplying hydraulic oil to the reciprocating common piping side, in order to switch supply of the hydraulic excavator or the crane main body from operation of the power shovel or crane main body to gripping operation or turning operation of the gripping mechanism; Provided in the operator's cab, an electromagnetic valve changeover switch for switching the gripping mechanism side electromagnetic valve to one of a gripping operation and a turning operation when a gripping operation or a turning operation of the gripping mechanism is selected. , Are provided.
[0011]
Further, in the revolving gripper for mounting a power shovel or a crane according to the present invention, the flow direction of the hydraulic oil flowing through the reciprocating common pipe is switched by operating the attachment pedal, and thereby the gripping mechanism revolving motor is rotated. It is desirable that the turning direction can be switched.
[0012]
Further, in the turning type gripping device for mounting a power shovel or a crane according to the present invention, a hydraulic flow rate control valve for adjusting a rotation speed of the gripping mechanism turning motor; It is desirable to have a turning speed changeover switch for controlling the flow control valve.
[0013]
Further, in the turning type gripping device for mounting a power shovel or a crane of the present invention, the electromagnetic valve changeover switch is provided in the attachment pedal, and a driver depresses the attachment pedal. At this time, it is desirable that the gripping mechanism side electromagnetic valve is configured to be switched between one for gripping operation and one for turning operation.
[0014]
Furthermore, in the revolving type gripper for mounting a power shovel or a crane of the present invention, the attachment pedal switches the gripping mechanism side electromagnetic valve for gripping operation by the driver stepping forward or backward. A hydraulic oil for gripping operation is supplied to the reciprocating common pipe, and a driver depresses it to the right or left to switch the gripping mechanism side electromagnetic valve to a revolving operation, and a revolving operation is performed on the reciprocating common pipe. It is desirably configured to supply hydraulic oil for use. Thus, the driver can perform the operations for the gripping operation and the turning operation of the gripping mechanism only by performing the operation of depressing the attachment pedal in the front, rear, left, and right cross directions.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG. 1 is a schematic view showing a power shovel with a rotary bucket device (attachment) according to Embodiment 1 of the present invention, FIG. 2 is a plan view showing the rotary bucket device of FIG. 1 alone, and FIG. It is a perspective view of.
[0016]
In FIG. 1-3, 21 is a power shovel, 22 is a cab of the power shovel 21, 23 is a boom, 24 is a boom cylinder for driving the boom 23, 25 is an arm, 26 is an arm cylinder for driving the arm 25, 27 is A fixed bucket for excavation, 28 is a movable bucket for holding, 29 is a rotating base for supporting both the fixed bucket 27 and the movable bucket 28, and 30 is a drive base for driving the fixed bucket 27. Bucket cylinder.
[0017]
In the first embodiment, the boom cylinder 24, the arm cylinder 26, and the bucket cylinder 30 are disposed from the main body of the power shovel 21 when the operator operates the right and left operation levers in the cab 22. Hydraulic piping is used to send and drive hydraulic oil.
[0018]
In FIG. 1-3, reference numeral 31 denotes a right operating lever provided in the cab 22 (the left operating lever is not shown), and 32 denotes a switch provided on the right operating lever 31 for rotating. A bucket open / close swivel switch 33 for switching the operation of the bucket device to one of gripping and swiveling; a switch 33 provided on the right operation lever 31 for setting the swivel speed of the rotary bucket device to either high speed or low speed; A bucket turning speed changeover switch 34 for switching between the open / close and turning operations is a solenoid valve attached to the rotating base 29, and is a bucket opening / closing turning switching electromagnetic device for switching the operation of the rotary bucket device between open / close and turning. A valve (waterproof) 35 is a hydraulic motor mounted on the rotating base 29, A bucket swing motor, for rotating the two buckets 27 and 28 (rotating bucket device) through.
[0019]
In the first embodiment, as a configuration of the rotary bucket device, a bucket opening / closing swing switching electromagnetic valve 34 and a bucket swing motor 35 are attached to one position on the rotating base 29 in close proximity to each other. (See FIGS. 2 and 3).
[0020]
In FIG. 1-3, reference numeral 36 electrically connects a bucket open / close swing switch 32 and a bucket swing speed switch 33 in the cab 22 and a bucket open / close swing switch electromagnetic valve 34 on the rotary bucket device side. It is an electrical wiring for connection. Reference numeral 37 denotes an attachment pedal provided in the cab 22. The attachment pedal 37 switches the supply of hydraulic oil to a breaker pipe (reciprocating pipe) 38, which will be described later, to operate the power shovel body from the rotary type. An attachment pedal for switching to an operation of the bucket device and for performing a gripping / turning operation of the rotary type bucket device. Reference numeral 38 denotes a breaker pipe for an attachment provided in advance in the power shovel 21 main body (a common reciprocating pipe for connecting between the main body side and the attachment (the gripping mechanism in the first embodiment) side, including a hydraulic valve). Reference numeral 39 denotes a mounting bracket for mounting the rotary bucket device to the arm 25 and the bucket cylinder 30 in FIG.
[0021]
In the first embodiment, the breaker pipe 38 is covered with a hose at a portion indicated by reference numeral 38 in FIG. 1 and is exposed to the outside, but the other portions are metal pipes, and the boom 23 and the arm 25 and so on. In the first embodiment, when the driver operates the bucket open / close turning switch 32 and the bucket turning speed switch 33 in the operator's cab 22, the electric signal is transmitted via the electric wiring 36 to the rotary bucket device side. Is transmitted to the electromagnetic valve 34 for switching the opening and closing of the bucket. In the first embodiment, when the driver operates the attachment pedal 37, the hydraulic pressure corresponding to the operation is used to drive the movable bucket 28 via the bucket open / close swing switching electromagnetic valve 34. It is transmitted to a mechanism (cylinder) or the bucket turning motor 35.
[0022]
Although not shown, in the first embodiment, a flow control valve for controlling the flow rate of the hydraulic oil supplied to the bucket swing motor 35 (thereby adjusting the swing speed of the bucket swing motor 35). (Electromagnetic valve) and a pressure control valve (electromagnetic valve) for controlling (decompressing) the hydraulic pressure of the hydraulic oil sent to the rotary bucket device.
[0023]
Next, the operation of the first embodiment will be described. First, the operations of excavation, scooping, and scraping by the rotary bucket device of the first embodiment will be described. When performing these operations, the driver first pulls the right operating lever 31 in FIG. Next, the left operation lever is tilted forward to move the tip of the arm 25 forward. Next, the right operating lever 31 is tilted to the right to raise the tip of the fixed bucket 27 forward (at this time, the movable bucket 28 was moved so that the tip is as close to the right as possible in FIG. 1). State). Next, the left operation lever is pulled toward the user, and the tip of the arm 25 is moved toward the user. Next, the right operating lever 31 is tilted to the left to move the tip of the fixed bucket 27 toward the front. Excavation, scooping, and scraping operations are performed by the above-described single operation or the simultaneous mixing operation.
[0024]
Next, a gripping operation by the rotary bucket device of the first embodiment will be described. In this case, the driver first depresses the attachment pedal 37 to switch the supply of the hydraulic oil to the breaker pipe 38 side (switches the operation of the power shovel body to the operation of the rotary bucket device) and the right side. The bucket open / close swivel switch 32 provided on the operation lever 31 is pressed once to switch from the neutral (during excavation) state to the gripping state. Thereby, the electromagnetic valve 34 for switching the opening / closing rotation on the bucket side is switched for gripping (opening / closing), and hydraulic oil is supplied via the electromagnetic valve 34 to the cylinder for driving the movable bucket 28 (movable cylinder in FIG. 1). (Provided inside the side bucket 28). Next, when the driver steps on the attachment pedal 37 at the foot of the driver's cab 22 toward the front, the movable bucket 28 for gripping moves its tip forward (in the direction of the arrow α in FIG. 1), The fixed-side bucket 27 moves so as to close (then, when the right operation lever 31 is pulled forward, the boom 23 is raised). The gripping operation is performed by the above single operation or the simultaneous mixing operation.
[0025]
Next, the turning operation of the rotary bucket device subsequent to the gripping operation of the rotary bucket device of the first embodiment will be described. In this case, the driver first tilts the left operating lever to the right (left), turns the power shovel 21 body right (left), and further tilts the left operating lever forward to move the tip of the arm 25 forward. The arm 25 is moved so as to move to. Next, the left operation lever is pulled forward, the tip of the arm 25 is moved forward, the right operation lever 31 is further moved forward (forward), and the rotary bucket device is moved upward (down). Next, a bucket open / close swing changeover switch 32 provided on the right operation lever 31 is pressed (second switch operation), and the bucket open / close swing changeover electromagnetic valve 34 on the bucket side is switched from gripping to swinging. Next, when the driver steps on the attachment pedal 37 at the foot of the driver's cab 22 forward (toward this side), hydraulic oil is supplied to the bucket turning motor 35, and the entire rotary bucket device is moved to the right (left). ) Direction. As described above, when the driver switches the stepping direction (forward or backward) of the attachment pedal 37, the flow direction of the hydraulic oil in the breaker pipe (reciprocating pipe) 37 is switched, and as a result, the bucket The rotation direction of the swing motor 35 can be switched. The turning operation of the rotary bucket device is performed by the above single operation or the simultaneous mixing operation.
[0026]
In the turning operation of the rotary bucket device, the driver operates the bucket turning speed switch 33 of the right operation lever 31 to change the turning speed by the bucket turning motor 35 of the rotary bucket device. Can be switched between fast and slow. That is, in the first embodiment, a flow control valve (not shown) for controlling the flow rate of the hydraulic oil supplied to the bucket swing motor 35 is provided separately from the bucket open / close swing switching electromagnetic valve 34. I have. When the driver operates the bucket turning speed changeover switch 33 of the right operation lever 31, an electric signal is transmitted to the flow control valve (electromagnetic valve), and the flow rate of the hydraulic oil is controlled. The speed can be switched between high and low.
[0027]
Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. In FIG. 4-5, the same parts as those in FIG. 1-3 are denoted by the same reference numerals, and description thereof will be omitted. In the second embodiment, as a configuration of the rotary bucket device, a bucket opening / closing swing switching electromagnetic valve 34 and a bucket swing motor 35 are located at positions separated from each other via the mounting bracket 39 on the rotating base 29. The second embodiment differs from the first embodiment in that the second embodiment is attached to the second embodiment. Except for this point, the configuration of the second embodiment is the same as that of the first embodiment.
[0028]
The embodiment of the present invention has been described above, but the present invention is not limited to this, and various modifications can be made. For example, in the first and second embodiments, the bucket open / close swing switch (electromagnetic valve switch) 32 is attached to the operation lever 32 in the cab 22. In the present invention, the bucket open / close swing switch ( An electromagnetic valve changeover switch) may be attached to the attachment pedal 37 in the cab 22. In this case, the driver only presses down the attachment pedal 37 to supply hydraulic oil from the breaker pipe 38 to the electromagnetic valve changeover switch side, thereby performing an operation for gripping and turning the rotary bucket device. It becomes possible to do. For example, when the driver depresses the attachment pedal forward (or backward), the bucket-side electromagnetic valve is used for the "open" operation (or the "close" operation) in the gripping operation of the movable bucket. When the driver depresses the attachment pedal to the right (or to the left) while switching the hydraulic oil for the gripping operation to the reciprocating pipe, the bucket-side electromagnetic valve is turned to the right during the turning operation. It can be configured to switch to turning (or left turning) and supply hydraulic oil for turning operation to the reciprocating pipe. In this case, the driver simply depresses the attachment pedal in any of the front, rear, left, and right cross directions to grip (open or close) and turn (clockwise or counterclockwise) the bucket. Operations can be performed. With this configuration, even a driver who has no experience of operating the attachment of the conventional power shovel can very easily perform the gripping / turning operation of the rotary bucket device.
[0029]
In each of the first and second embodiments, the rotary bucket device includes, as the gripping mechanism, the fixed bucket 27 and the movable bucket 28 configured to be able to open and close the fixed bucket 27. However, the gripping mechanism in the present invention is not limited to this. For example, a rotary bucket device in which two opposing buckets can be opened and closed together, a fixed-side fork, and a fixing fork A rotary fork device including a movable fork configured to be capable of opening and closing with respect to the side fork, or a rotary fork device configured such that two opposing forks can be both opened and closed.
[0030]
【The invention's effect】
As described above, according to the present invention, the gripping mechanism side electromagnetic valve for selectively switching and supplying the hydraulic fluid for gripping or turning to one of the gripping mechanism and the gripping mechanism turning motor is provided. And an electromagnetic valve changeover switch for switching the gripping mechanism side electromagnetic valve to one of a gripping operation and a turning operation is provided on a cab side of a power shovel or a crane main body, and the gripping mechanism is further provided. And an attachment pedal for selectively supplying hydraulic oil to the gripping mechanism turning motor is provided in the cab of the main body, so that the gripping operation and turning of the turning type gripping device mounted on a power shovel or a crane. The operation is similar to the operation of conventional general-purpose attachments such as breakers, forks, grapples, crushers, and steel cutters. Can be carried out at work feeling, as compared with conventional rotary bucket device, operating method for gripping and turning is simplified, eliminating the need long term skill to get used to the operation, there is a merit that.
[0031]
Further, according to the present invention, a gripping mechanism side electromagnetic valve for selectively switching and supplying hydraulic oil for gripping operation or turning operation to one of the gripping mechanism and the gripping mechanism turning motor is provided. Side, and an electromagnetic valve changeover switch for switching the gripping mechanism side electromagnetic valve between a gripping operation and a turning operation is provided on the cab side of the power shovel or the crane main body. It is possible to simplify the configuration of the hydraulic piping for driving the gripping device and to reduce the cost (in the conventional rotary bucket device, it is operated by either the driving mechanism of the movable bucket for gripping or the bucket turning motor) Equipped with a valve on the main body of the power shovel to selectively switch and supply oil, to supply hydraulic oil to the drive mechanism of the movable bucket for gripping Since the hydraulic piping and the hydraulic piping for supplying hydraulic oil to the bucket swing motor were specially provided separately from the hydraulic piping for supplying hydraulic oil to the drive mechanism of the bucket for excavation, The configuration of the hydraulic piping was complicated and the equipment was expensive.)
[0032]
In particular, in the present invention, the supply of hydraulic oil to the gripping mechanism turning motor and the gripping mechanism side electromagnetic valve is performed by using a hydraulic pipe (such as a breaker or a rotating fork) for an attachment provided in advance on the body of a power shovel or crane. Since it is performed from the reciprocating pipe), it is not necessary to provide a special hydraulic pipe for the revolving gripping device, and the configuration of the hydraulic pipe can be greatly simplified as compared with the related art.
[0033]
Further, according to the present invention, a hydraulic flow rate control valve for adjusting the rotation speed of the gripping mechanism rotation motor, and a rotation speed switch provided on the cab side of the main body for controlling the hydraulic flow rate control valve are provided. When the gripping mechanism is turned, it can be easily stopped in a direction desired by the driver, and can be prevented from rotating at an excessively high speed. Also, the gripping mechanism can be easily prevented from moving with a heavy object even when performing an operation with an angle other than horizontal by holding a heavy object.
[0034]
Further, in the present invention, when the electromagnetic valve changeover switch is provided on the attachment pedal in the cab, the operation of the swing type gripping device can be performed only by the driver depressing the attachment pedal.
[0035]
Further, in the present invention, when the driver depresses the attachment pedal forward or backward, the gripping mechanism side electromagnetic valve is switched to a gripping operation, and hydraulic oil for a gripping operation is supplied to the reciprocating shared pipe. Supply and when the driver steps on it to the right or left, the gripping mechanism side electromagnetic valve is switched for swiveling operation and hydraulic oil for swiveling operation is supplied to the reciprocating shared pipe. When the driver depresses the attachment pedal in any of the front, rear, left, and right cross directions, the driver can perform the gripping (opening / closing) operation and the turning (rightward) of the gripping mechanism. (Turning and left turning) operations can be performed. Therefore, according to the present invention, even a driver who does not have experience of operating the attachment of the conventional power shovel can perform the operation for the gripping / turning operation of the swing type gripping device very easily.
[Brief description of the drawings]
FIG. 1 is a schematic view showing a revolving gripper for mounting a power shovel or a crane according to a first embodiment of the present invention.
FIG. 2 is a plan view showing the rotary bucket device of FIG. 1;
FIG. 3 is a perspective view showing the rotary bucket device of FIG. 1;
FIG. 4 is a schematic diagram showing a turning type gripping device for mounting a power shovel or a crane according to a second embodiment of the present invention.
FIG. 5 is a plan view showing the rotary bucket device of FIG. 2;
FIG. 6 is a plan view showing a conventional power shovel with a rotary bucket device.
[Explanation of symbols]
21 Power shovel
22 Driver's cab
23 Boom
24 Boom cylinder
25 arm
26 Arm cylinder
27 Fixed bucket
28 Movable bucket
29 rotating base
30 bucket cylinder
31 Right operating lever
32 Bucket open / close swivel selector switch
33 Bucket swing speed switch
34 Bucket open / close swivel switching electromagnetic valve
35 Bucket swing motor
36 electrical wiring
37 Attachment pedal
38 Breaker piping
39 Mounting bracket

Claims (5)

A swivel type gripper for mounting a power shovel or crane,
A gripping mechanism for gripping an object, which is mounted on a power shovel or a crane arm tip,
A gripping mechanism turning motor attached to the gripping mechanism, for turning the gripping mechanism,
Provided on the gripping mechanism side, a gripping mechanism side electromagnetic valve for switching the supply destination of hydraulic oil for gripping operation or turning operation to any of the gripping mechanism and the gripping mechanism turning motor,
Reciprocating shared piping for attachments such as breakers and rotating forks, which is provided in advance on the body of the excavator or crane,
In order to switch the supply of hydraulic oil provided for the operation cab on the main body side of the power shovel or crane from the operation of the power shovel or crane main body to the gripping operation or the turning operation of the gripping mechanism, the hydraulic oil is shared for the reciprocating operation. Attachment pedal to supply to the piping side,
A power shovel or a crane main body provided in the operator's cab, for switching the gripping mechanism side electromagnetic valve between gripping operation and turning operation when the gripping operation or the turning operation of the gripping mechanism is selected. An electromagnetic valve selector switch,
A turning type gripper for mounting a power shovel or a crane, comprising: 2. The method according to claim 1, wherein the operation direction of the attachment pedal switches a flow direction of hydraulic oil flowing through the reciprocating pipe, thereby switching a turning direction of the gripping mechanism turning motor. A revolving gripper for mounting a power shovel or crane. In claim 1 or 2,
A hydraulic flow control valve for adjusting the rotation speed of the gripping mechanism turning motor,
A turning speed switch for controlling the hydraulic flow rate control valve, which is provided on the cab side of the main body,
A turning type gripper for mounting a power shovel or a crane, comprising: In claim 1, 2, or 3,
The electromagnetic valve changeover switch is provided in the attachment pedal, and when a driver depresses the attachment pedal, the gripping mechanism-side electromagnetic valve is used for either a gripping operation or a turning operation. A revolving gripper for mounting on a power shovel or crane, wherein the revolving gripper is configured to be switched to: 5. The attachment pedal according to claim 4, wherein a driver depresses the driver forward or backward to switch the gripping mechanism side electromagnetic valve to a gripping operation and supply hydraulic oil for a gripping operation to the reciprocating common pipe. Together, the driver is configured to switch the gripping mechanism-side electromagnetic valve to a turning operation by supplying a hydraulic oil for the turning operation to the reciprocating shared pipe by a driver stepping on the right or left thereof, Thereby, a power shovel characterized in that an operation for gripping operation or turning operation of the gripping mechanism can be performed only by a driver depressing the attachment pedal in front, rear, left and right cross directions. Or a swivel type gripper for crane mounting.

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