JP2000248752A - Device for mounting clamping type bucket on construction machine arm - Google Patents

Abstract

PROBLEM TO BE SOLVED: To mount a clamping type bucket by operating an arm and a rod. SOLUTION: A temporarily supporting protrusion 18 for temporarily supporting a lower pawl driving transmission shaft at its lower side and a first connection groove 19 in an approximate C-shape to be fitted in the lower pawl driving transmission shaft are provided on the outer face of a rod side base 13. A second connection groove 20 in an approximate C-shape open backward to be fitted in a fixed shaft is provided at the rear of the outer face of the arm side base 9. A third connection groove 21 in an approximate C-shape open frontward to be fitted in an upper pawl driving transmission shaft is provided at the end of the outer face of the arm side base 9. At least one of the second connection groove 20 and the third connection groove 21 is movable to the other. A movement adjusting means 16 is provided for varying a space between the second connection groove 20 and the third connection groove 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for attaching a clamp type bucket to an arm of a construction machine for detachably attaching the clamp type bucket to an arm of a construction machine such as a hydraulic bucket.

[0002]

2. Description of the Related Art In recent years, instead of an original excavating bucket, a clamp-type bucket capable of holding waste materials and building materials has been attached to an arm of a construction machine such as a hydraulic excavator. Demolition work,
Waste materials and scraps are being accumulated.

[0003] Conventionally, when a clamp-type bucket capable of holding waste materials and building materials is used instead of an original excavation bucket on an arm of a construction machine such as a hydraulic excavator, the arm is usually attached to the arm of the construction machine. After the excavating bucket is removed, the clamp type bucket is attached. In this case, the pin that attaches the clamp type bucket to the arm and the tip of the rod of the hydraulic cylinder attached to the arm is removed, and the clamp type bucket is attached to the arm and the pin via the link using the pin hole provided in the rod. However, the mounting work of these crank-type buckets is performed by the worker who operates the arm or rod in the driver's seat of the construction machine, and the hole of the clamp-type bucket and the link hole near the clamp-type bucket. It is necessary to have a worker who actually inserts the pins and connects them while aligning them, or who actually inserts and connects the pins while aligning the hole of the link with the hole of the arm or rod. In addition, multiple workers are required for connection, and the position is actually adjusted near the clamp type bucket, and the connection work using pins is performed by the worker himself. Is performed in the work, Nikuku position Awasegashi, connecting work is very difficult, consuming work time, further, there is a problem that is dangerous to work.

If the above operation is to be performed alone, the operator must enter and exit the driver's seat many times, go to a position near the clamp-type bucket, perform positioning, and insert a pin. In addition, there is a problem that the operation is extremely complicated and involves risks.

[0005]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above points, and a clamp-type bucket can be easily and securely mounted by operating an arm and a rod, and furthermore, a safe and secure operation is possible. It is an object of the present invention to provide an apparatus for mounting a clamp-type bucket on an arm of a construction machine capable of performing an installation operation.

[0006]

According to the present invention, there is provided an apparatus for mounting a clamp-type bucket on an arm of a construction machine according to the present invention. A protruding portion 4 which rotatably supports the lower claw 3 and which can protrude upward with the lower claw 3 down and the upper and lower claws 2 and 3 in a sideways posture.
Are mounted on a shaft 33, a lower pawl drive transmission shaft 5 is provided at the tip of the protruding portion 4, a fixing shaft 22 is provided at a rear portion of the upper pawl 2, and a fixing shaft 22 of the upper pawl 2 is provided. A device for detachably mounting a clamp type bucket 7 constituted by providing a drive transmission shaft 6 for an upper claw on a front side, and an arm-side shaft for rotatably supporting a tip end of an arm 1. An arm-side base 9 having a mounting portion 8 at a rear end portion, and a rod-side shaft mounting portion 12 at a rear end portion for axially mounting to a distal end portion of a rod 11 of a cylinder 10 attached to the arm 1 are provided. A mounting base 17 is provided by connecting the tip of the rod-side base 13 and the tip of the arm-side base 9 so as to be rotatable by a shaft 15. The attachment 8 is connected to the arm 1 and the rod-side shaft attachment 12
The lower pawl drive transmission shaft 5 is attached to the outer surface of the rod-side base 13 outside the mounting device body 17 in a state in which the drive transmission shaft 5 is connected to the rod.
And a substantially C-shaped temporary support for fitting the lower claw drive transmission shaft 5 at a position slightly above the temporary support projection 18 for receiving and supporting the same from below. First connection groove 1 opened toward projection 18
In the state where the arm-side mounting portion 8 is connected to the arm 1 and the rod-side mounting portion 12 is connected to the rod 11, a rear portion of the outer surface of the arm-side base 9 outside the mounting device body 17 is provided. A substantially C-shaped second connection groove 20 which opens rearward for fitting into the fixing shaft 22 is provided, and the upper claw drive transmission shaft 6 is provided at the tip of the outer surface of the arm side base 9. A substantially C-shaped third opening toward the front for fitting
Of the second connection groove 20 and the third connection groove 21 so that at least one of the second connection groove 20 and the third connection groove 21 is movable with respect to the other. It is characterized in that it is provided with a movement adjusting means 16 for making the interval between them freely variable. With such a configuration, when the clamp-type bucket 7 is detachably attached to the arm 1 of a construction machine such as a hydraulic shovel, first, the arm is attached to the arm-side shaft attaching portion 8 of the attachment device A of the present invention. And a cylinder 10 attached to the arm 1 with a rod-side shaft attaching portion 12 attached thereto.
Of the arm 1 in this state.
By operating the rod 11 or the rod 11, the temporary support projection 18 is attached to the lower pawl drive transmission shaft 5 provided on the protrusion 4 projecting above the lower pawl 3 of the clamp type bucket 7 installed on the ground or the like from below. In this temporarily supported state, the clamp-type bucket 7 is slightly lifted while the rod 11 is retracted, and the second connection groove 20 is positioned above the fixing shaft 22.
Next, the second connecting groove 20 is fitted into the fixing shaft 22 by operating the arm 1 and the rod 11, and then the second connecting groove is fitted into the fixing shaft 22 by operating the arm 1 and the rod 11. 20 is directed obliquely rearward and upward, and the third connecting groove 21 is opposed to the rear of the drive transmission shaft 6 for the upper pawl. Then, the arm 1 and the rod 11 are operated to operate the clamp-type bucket 7. And lift the second connecting groove 2
0, the fixing shaft 22 is lifted.
The first connecting groove 19 is fitted into the lower pawl drive transmission shaft 5 by operating the rod 11 or the rod 11, and then the movement adjusting means 16 reduces the dimension between the second connecting groove 20 and the third connecting groove 21. The third connecting groove 2
The clamp-type bucket 7 can be attached by performing a series of operations of fitting the arm 1 and the rod 11 into the drive transmission shaft 6 for the upper pawl. Can be performed without manual operation.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings.

Usually, a bucket B for excavation is attached to an arm 1 of a construction machine such as a hydraulic excavator. An excavating bucket B is generally mounted on an arm 1 of a construction machine as shown in FIG. 16, and is rotated by operating a rod 11 of a cylinder 10 attached to the arm 1 to move a driving rod 23. It can be made to move. The drive rod 23 includes a connection link 24 and a support link 25 that are rotatably connected.
The distal end of the rod 11 of the cylinder 10 is rotatably connected to a connecting portion between the connecting link 24 and the support link 25.

A first mounting hole 26 and a second mounting hole (not shown) are provided at the distal end of the arm 1 as shown in FIG. 17, and the first mounting hole 26 located on the distal end side of the arm 1 is provided.
One end of a mounting piece 27 protruding from the bucket B is rotatably connected by a connecting pin 28.
The lower end of the support link 25 is rotatably connected to the mounting hole by a connection pin 29.

The distal end of the connecting link 24 is rotatably connected to the other end of the mounting piece 27 by a connecting pin 30.
The upper end of the support link 25 is pivotally attached to the front end of the rod 11 and the rear end of the connection link 24 by a connection pin 31.

Then, the support link 25 and the connecting link 24 are moved by extending and contracting the rod 11 of the cylinder 10, and the connecting link 24 and the connecting link The excavation work is performed by rotating the bucket B by the support link 25.

A clamp type bucket 7 attached to the tip of the arm 1 in place of the excavating bucket B is shown in FIG.
4.

The clamp type bucket 7 has a rear end of the upper pawl 2 and a rear end of the lower pawl 3 which are rotatably mounted on a pivot shaft 32 and is fixed to the rear of the upper pawl 2. A shaft 22 is provided, and a drive transmission shaft 6 for the upper pawl is provided on a side of the upper pawl 2 ahead of the fixing shaft 22. Here, as the fixing shaft 22, a pivot shaft 32 provided to be inserted through the upper claw 2 to axially attach the upper claw 2 and the lower claw 3 may be used also as the fixing shaft 22. The fixing shaft 22 may be provided on the upper pawl 2 separately from the pivot shaft 32 as in the embodiment shown in the accompanying drawings. A protruding portion 4 is rotatably supported by a shaft 33 at the rear portion of the lower claw 3.
Is provided. As shown in FIG. 14, when the lower claw 3 is turned down and the upper and lower claws 2 and 3 are placed sideways on the installation surface such as the ground, the protrusion 4 protrudes upward. There is provided an upward posture holding means capable of setting the protruding portion 4 in the upright position so that the protruding portion 4 is in a slightly forwardly inclined posture so as to be slightly forward. Contact portion 38 at the rear end (the contact portion 38
Constitutes an upward attitude holding means) so that the projection 4 is held so as not to fall forward any more, so that when the clamp type bucket 7 is installed in the sideways state, the projection 4 rises upward. , And the state of protruding is maintained.

FIG. 1 shows a mounting device A for mounting the clamp type bucket 7 having the above-mentioned structure on the tip of the arm 1 in place of the bucket B for excavation.

The mounting device A includes an arm-side base 9 and
The rod-side base 13 is composed of two members, and the tip of the rod-side base 13 is connected to the tip of the arm-side base 9 by a shaft 1.
5 to form a mounting device body 17 which is rotatably connected. At the rear end of the arm-side base 9, an arm-side shaft attachment portion 8 formed of a hole for rotatably supporting the front end of the arm 1.
Is provided. At the rear end of the rod-side base 13, there is provided a rod-side shaft mounting portion 12 formed of a hole for mounting the front end of the rod 11 of the cylinder 10 attached to the arm 1.

The outside of the mounting device main body 17 (that is, the mounting device main body 17 in a state where the arm-side mounting portion 8 is connected to the arm 1 and the rod-side mounting portion 12 is connected to the rod 11 as described later). A temporary support projection 18 for receiving and temporarily supporting the lower pawl drive transmission shaft 5 from below is provided on the outer surface of the rod-side base 13 (outside), and at a position slightly above the temporary support projection 18. A substantially C-shaped temporary support projection 1 to be fitted to the lower nail drive transmission shaft 5
A first connection groove 19 that is open in eight directions is provided.

At the rear of the outer surface of the arm-side base 9, there is provided a substantially C-shaped second connecting groove 20 which is open rearward for fitting into a fixing shaft. Further, a front portion of the outer surface of the arm-side base 9 has a substantially C-shaped third opening toward the front to be fitted to the drive transmission shaft 6 for the upper claw.
Are provided. Here, at least one of the second connection groove 20 and the third connection groove 21 is movable with respect to the other. In the embodiment shown in the accompanying drawings, the third connection groove 21 moves. Specifically, a third end is provided at the tip of the arm side base 9.
The third connecting groove 21 is rotatable with respect to the arm base 9 by rotatably supporting one end of the distal end base 14 having the connecting groove 21. It is provided. The second connecting groove 20 and the third connecting groove 21 are connected by the movement adjusting means 16, and by operating the moving adjusting means 16, the second connecting groove 20 to the third connecting groove are formed. The distance between the second connection groove 20 and the third connection groove 21 can be varied by moving the first connection groove 21 (in the embodiment, moving the third connection groove 21).

The second connecting groove 20 and the third connecting groove 21
The movement adjusting means 16 for varying the distance between the two is, for example, a mechanism as shown in FIG. In FIG. 2, only the rotation of the bolt 16 a is movable with respect to the second connecting portion 20, and the bolt 16 a is moved axially (front-back direction) with respect to the second connecting groove 20.
Is mounted so as not to move (a stopper 16h fixed to the bolt 16a is fitted into an axial movement preventing recess 16i provided in the second connecting groove 20 so as to be unable to move in the axial direction). A nut 16b is screwed onto the bolt 16a, and the nut 1
The rear end of the link 6c is rotatably connected by a shaft 16d, and the long hole 16e of the front end of the link 16c is rotatably connected to the third connecting groove 21 by a shaft 16f to adjust the movement. Means 16 is constituted. By rotating the operation portion 16g of the bolt 16a of the movement adjusting means 16, the position of the nut body 16b with respect to the bolt 16a is changed, whereby the position between the second connection groove 20 and the third connection groove 21 is changed. Is made to be variable.

Of course, the movement adjusting means 16 is not limited to the one having the above-described structure.
Other configurations may be used as long as the interval between the zero and the third connection groove 21 can be changed.

In the above embodiment, the third connecting groove 21 is movably provided at the front end of the arm base 9, but the second connecting groove 21 is provided at the rear end of the arm base 9. May be movably provided, and the arm-side base 9 is divided into two front and rear parts, and the front and rear divided bodies are rotatably connected about a central axis, and are connected to the rear divided body. The second connecting groove 20 is provided, the third connecting groove 21 is provided in the front divided body, and the second connecting groove 20 and the third connecting groove 21 are connected by the movement adjusting means 16 to the second connecting groove. The space between the groove 20 and the third connection groove 21 may be variably connected.

The arm-side base 9 having the second connection groove 20 and the third connection groove 21 and the rod-side base 13 having the temporary support projection 18 and the first connection groove 19 are provided. Means that the arm-side base 9 and the rod-side base 13 are separately manufactured at the factory as one completed mounting device A, and then the shaft-side base 15 is used at the site. It is good also as attachment device A completed by combining with.

In order to mount the clamp type bucket 7 on the distal end of the arm 1 using the mounting device A having the above-described configuration in place of the excavating bucket B, the following operation is performed.

First, as shown in FIG.
Remove the excavating bucket B normally attached to the tip of the. In this case, as shown in FIG. 17, the connecting pin 28 connecting one end of the mounting piece 27 projecting from the bucket B to the first mounting hole 26 on the distal end side of the arm 1 is removed, and the support link is also provided. The bucket B for excavation is removed by removing the connecting pin 31 connecting the upper end of the rod 25 to the front end of the rod 11 and the rear end of the connecting link 24. Therefore, the lower end of the support link 25 is left attached to the arm 1 by the connecting pin 29 so as to be freely rotatable.

Next, the above-described mounting device A is mounted on the distal end of the arm 1. That is, the first mounting hole 26 at the tip of the arm 1 and the arm-side base 9 of the mounting device A are connected to the arm-side shaft mounting portion 8 using the connecting pin 28, and the rod-side base 13 of the mounting device A is connected. The connecting device A is attached to the distal end of the arm 1 by connecting the distal end of the rod 11 and the upper end of the support link 25 to the upper end of the support link 25 as shown in FIG. is there.

After the mounting device A is mounted on the distal end of the arm 1 in this manner, the clamp type bucket 7 is mounted in the order shown in FIGS.

First, an operator operates the arm 1 and the rod 11 while sitting on the driver's seat of the construction machine, and attaches the mounting device A to the rear of the clamp type bucket 7 installed on an installation surface such as the ground as shown in FIG. Position. In the state of FIG. 4, the mounting device A is positioned so that the portion provided with the third connection groove portion 21 has a V-shape positioned at the lowest position, and the protrusion 4 of the lower claw 3 of the clamp type bucket 7 is provided. The provisional support projection 18 of the mounting device A is positioned obliquely rearward and below the lower pawl drive transmission shaft 5 provided at the position shown in FIG.

Next, by operating the arm 1 and the rod 11, the temporary supporting projection 18 is hooked from below on the lower pawl drive transmission shaft 5 as shown in FIG.

Next, in this temporarily supported state, the clamp type bucket 7 is slightly lifted while the rod 11 is retracted, as shown in FIG.
The second connecting groove 20 is located above the fixing shaft 22 as shown in FIG. In the state of FIG. 6, the rod 11 is retracted, so that the third connection groove 21 becomes the second connection groove 20.
It will be located further above.

Next, the arm 1 and the rod 11 are operated to fit the second connecting groove 20 into the fixing shaft 22 as shown in FIG.

Next, as shown in FIG. 8, the arm 1 and the rod 11 are operated so that the opening of the second connecting groove 20 fitted in the fixing shaft 22 is directed obliquely rearward and upward, and Of the upper claw drive transmission shaft 6.

Further, the arm 1 and the rod 11 are operated to raise the clamp type bucket 7 a little further, and as shown in FIG.
2 supports the fixing shaft 22 and fits the first connecting groove 19 into the lower pawl drive transmission shaft 5. Thereafter, the worker goes down from the driver's seat of the construction machine, goes to the vicinity of the mounting device A, and operates the movement adjusting means 16 to operate the second connecting groove 2.
0 and the third connection groove 21 are expanded so as to increase the dimension between the third connection groove 21 and the third connection groove 21 so that the upper pawl drive transmission shaft 6
It fits in.

In the present invention, the lower pawl drive transmission shaft 5 provided on the projection 4 pivotally supported at the rear end of the lower claw 3 is attached to the projection 4 as follows. That is, a pair of protrusions 4 are pivotally mounted on both sides of the rear end of the lower claw 3 by shafts 33, respectively, and a cylindrical body 34 is provided on the opposing surface of the tip of the protrusion 4 as shown in FIG. Protruding,
The lower pawl drive transmission shaft 5 is attached to the protruding portion 4 by fitting the lower pawl drive transmission shaft 5 into the opposed cylindrical body 34. Here, a pair of fixing bosses 36 having bolt holes 35 are fitted to the cylindrical body 34 so as to be movable in the axial direction.

However, as described above, the temporary support projections 18
Are fixed to the lower pawl drive transmission shaft 5 from below and when the first connecting groove 19 is fitted into the lower pawl drive transmission shaft 5, the two fixing bosses 36 are respectively connected to the projecting base side of the cylindrical body 34. To increase the distance between the fixing bosses 36 so that the temporary support projection 18 and the lower pawl drive transmission shaft 5 can be easily fitted into the lower pawl drive transmission shaft 5. After the claw drive transmission shaft 5 is fitted, the movement adjusting means 16 is operated to operate the second connection groove 20 and the third connection groove 2.
Before or after the third connecting groove 21 is fitted into the upper pawl drive transmission shaft 6 by pushing or expanding so as to increase the dimension between them, the fixing boss 36 is moved to abut the rod side base 13. ,
Bolt hole 35 provided in fixing boss 36, rod side base 13
A bolt is inserted by using a bolt hole 37 provided in each of the first and second fixing bosses 36 and the both fixing bosses 36 and the rod-side base 13 are fixed. In this manner, the temporary support projection 18 and the lower claw drive transmission shaft 5 can be easily fitted into the lower claw drive transmission shaft 5, and the fixing boss 36 and the rod-side base 13 can be easily and reliably later. And can be fixed.

In this manner, the clamp type bucket 7 is attached to the distal end of the arm 1 via the attachment device A.

As described above, according to the present invention, in the above-mentioned series of mounting operations for mounting the clamp type bucket 7 on the mounting device A, most of the operations (the operation of the last movement adjusting means 16 and the fixing boss 36). The operation other than the operation of fixing the rod-side base 13 to the rod-side base 13) may be the operation of operating the arm 1 and the rod 11 in the driver's seat, and can be performed simply, reliably, and safely in a short time.

When the clamp type bucket 7 is used, the arm 1 and the rod 11 are operated to
As shown in FIGS. 0 and 11, the upper claws 2 and the lower claws 3 are opened, and the upper claws 2 and the lower claws 3 are closed as shown in FIGS. Or crush it by pinching it.

[0037]

As described above, according to the first aspect of the present invention, the arm having the arm-side attachment portion at the rear end for rotatably supporting the front end of the arm is provided. Side base,
A rod-side base having, at a rear end thereof, a rod-side mounting portion for mounting on a front end of a rod of a cylinder attached to an arm; a front end of the rod-side base and an arm-side base; The mounting device main body is constituted by rotatably connecting the distal end of the mounting device to the arm by connecting the arm-side mounting portion to the arm and the rod-side mounting portion to the rod. A temporary support projection is provided on the outer surface of the rod-side base to receive and temporarily support the lower pawl drive transmission shaft from below, and the lower pawl drive transmission shaft is provided slightly above the temporary support projection. A state in which a substantially C-shaped first connecting groove portion which is open toward the direction of the temporary supporting projection for fitting is provided, and the arm-side shaft attaching portion is connected to the arm and the rod-side shaft attaching portion is connected to the rod. The outer surface of the arm side base that is outside the mounting device body A rearward opening is provided with a substantially C-shaped second connecting groove which is open rearward for fitting to the fixing shaft, and is fitted to the upper pawl drive transmission shaft at the tip of the outer surface of the arm side base. A third connecting groove having a substantially C-shape that opens forward, and at least one of the second connecting groove and the third connecting groove is movable with respect to the other. Since the movement adjusting means for making the distance between the second connection groove portion and the third connection groove portion variable is provided, in mounting the clamp type bucket on the arm of the construction machine, the mounting device of the present invention is used. Attach the arm end to the arm tip on the arm end, and attach the rod end to the end of the cylinder rod attached to the arm.
In this state, by operating the arm and rod,
The clamp type bucket can be easily, reliably and quickly mounted on the mounting device. After the mounting device is mounted on the arm and the rod, most of the mounting work is performed on the driver's seat of the construction machine. Since it is sufficient to perform the operation work for operating, and as described above, most of the work may be the operation work for performing the operation of the arm and the rod in the operator's seat of the construction machine, it is possible to work alone, and It is possible to perform safe work with almost no need to work near the bucket.

[Brief description of the drawings]

1A and 1B show a mounting device of the present invention, in which FIG. 1A is a side view, FIG. 1B is a front view, and FIG. 1C is a perspective view in a state where a movement adjusting means is omitted.

FIG. 2 is a cross-sectional view showing an example of a movement adjusting means of the arm-side base according to the first embodiment.

3A and 3B show a state in which the mounting device is mounted on a tip end of an arm of a construction machine, FIG. 3A is a side view, and FIG.
Is a perspective view.

FIG. 4 is a side view for illustrating a sequence of mounting a clamp type bucket using a mounting device mounted on a distal end portion of the arm.

FIG. 5 is a side view for explaining the order in which the clamp type bucket is mounted using the mounting device mounted on the distal end of the arm.

FIG. 6 is a side view for explaining the order in which the clamp type bucket is mounted using the mounting device mounted on the distal end of the arm.

FIG. 7 is a side view for explaining the order in which the clamp type bucket is mounted using the mounting device mounted on the distal end of the arm.

FIG. 8 is a side view for explaining the order in which the clamp type bucket is mounted using the mounting device mounted on the distal end of the arm.

FIG. 9 is a side view for explaining the order in which the clamp type bucket is mounted using the mounting device mounted on the distal end of the arm.

FIG. 10 is a side view showing an open state of the clamp type bucket when the clamp type bucket is attached to the tip of the arm via the attachment device of the above.

FIG. 11 is a perspective view showing an open state of the clamp type bucket when the clamp type bucket is attached to the tip of the arm via the attachment device of the above.

FIG. 12 is a side view showing a closed state of the clamp type bucket when the clamp type bucket is attached to the tip of the arm via the attachment device of the above.

FIG. 13 is a perspective view showing a closed state of the clamp type bucket when the clamp type bucket is attached to the tip of the arm via the attachment device of the above.

FIG. 14 is a perspective view of a clamp type bucket used in the above.

FIG. 15 is an exploded perspective view showing a cylinder, a fixing boss, a drive transmission shaft for a lower claw, a temporary supporting protrusion provided on a rod-side base, and a first connecting groove provided in the protruding portion.

FIG. 16 is a perspective view showing a state in which a bucket for excavation is attached to the tip of the arm.

FIG. 17 is a perspective view showing a state in which a bucket for excavation is removed from a tip portion of the arm.

[Explanation of symbols]

 1 Arm 2 Upper Claw 3 Lower Claw 4 Projection 5 Drive Transmission Shaft for Lower Claw 6 Drive Transmission Shaft for Upper Claw 7 Clamp Type Bucket 8 Arm Side Shaft Attachment 9 Arm Side Base 10 Cylinder 11 Rod 12 Rod Side Shaft Attachment DESCRIPTION OF SYMBOLS 13 Rod side base 14 Tip side base 15 Axis 16 Movement adjusting means 17 Mounting device main body 18 Temporary support projection 19 First connection groove 20 Second connection groove 21 Third connection groove 22 Fixing shaft

Claims (1)

[Claims] An upper arm and a lower arm are rotatably supported on an arm of a construction machine such as a hydraulic excavator, and the upper and lower claws are directed upward with the lower claws downward and the upper and lower claws in a horizontal posture. The projecting portion, which can be in a protruding posture, is mounted by being supported by a shaft, a lower pawl drive transmission shaft is provided at the tip of the protruding portion, and a fixing shaft is provided at a rear portion of the upper pawl, and the upper pawl is fixed. A device for detachably mounting a clamp-type bucket constituted by providing a drive transmission shaft for an upper pawl on a side forward of an application shaft, and an arm-side shaft for rotatably supporting a tip of an arm. An arm-side base having a mounting portion at a rear end portion, and a rod-side base having a rod-side mounting portion at a rear end portion for axially mounting the front end portion of a rod of a cylinder attached to the arm. Equipped, the tip of the rod-side base and the tip of the arm-side base can be freely rotated by a shaft The mounting device main body is configured by connecting the arm-side mounting portion to the arm, and the rod-side mounting portion is connected to the rod. A temporary supporting projection for receiving and temporarily supporting the lower pawl drive transmission shaft was provided, and was substantially C-shaped at a position slightly above the temporary supporting projection to be fitted to the lower pawl drive transmission shaft. A first connecting groove portion opened toward the direction of the temporary supporting projection is provided, and the arm side which is outside the mounting device main body in a state where the arm side attaching portion is connected to the arm and the rod side attaching portion is connected to the rod. At the rear of the outer surface of the base, there is provided a substantially C-shaped second connection groove that opens rearward for fitting into the fixing shaft,
A substantially C-shaped third connecting groove that opens forward is provided at the tip of the outer surface of the arm-side base for fitting into the drive transmission shaft for the upper claw, and the second connecting groove and the third connecting groove are provided. It is characterized in that at least one of the connection grooves is movable with respect to the other, and a movement adjusting means is provided for making the distance between the second connection groove and the third connection groove variable. Mounting device of clamp type bucket to arm of construction machine.