JPH0594356U - Clam shell work machine - Google Patents

Abstract

(57) [Abstract] [Purpose] It is safe and close to the swivel b so that the clam shell 5 can be lifted and moved by swiveling the swivel b with a small turning radius. The clam shell 5 can be simply operated and the swing operation can be safely performed with the clam shell 5 being tightly bound to the swivel base b so as not to swing. [Structure] Clam shell support plates 7 and 7 are provided on the front side of the swivel b in front of the fulcrum shaft 30 of the boom 3 and on both sides of the locus of pivoting movement of the boom 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mounts a swivel that swivels with a vertical swivel axis on a vehicle body that is driven by a traveling device, mounts a boom that can oscillate freely on and off, and mounts a telescopic arm on the tip side of the boom. Then, the present invention relates to an improvement of a clam-ciel working machine configured by suspending and supporting a clam-shell at its tip.

[0002]

[Prior Art]

 As shown in FIG. 1, a clam-shell type working machine A having the above-described configuration is normally a turning mechanism that turns on a top surface of a vehicle body a that is made to travel by a traveling device 1 made of a crawler with a vertical axis as a turning axis. A swivel base b formed in the form of a platform is mounted via the two, and a drive unit c including an engine / hydraulic device for driving the traveling device 1 and each working unit is mounted on the upper surface of the swivel base b. In addition to mounting, the boom 3 is rotatably and rotatably supported around the fulcrum shaft 30, and the telescopic arm 4 is supported on the tip end side of the boom 3 and the clam shell 5 is hung at the tip thereof. A seat d is mounted on the upper surface of the swivel base b, and a control device e for operating and controlling the boom 3, the telescopic arm 4, the clam shell 5, and the operating parts of the traveling device 1 is mounted. It

[0003]

[Problems to be solved by the device]

 As shown in FIG. 2, the clam-shell operating machine A configured as described above rotates the boom 3 and the telescopic arm 4, lowers the clam-shell 5 suspended and suspended, and operates it to grab the earth and sand. Then, as shown in FIG. 3, the boom 3 is erected and raised to raise the clam shell 5, and the earth and sand grasped is discharged to an appropriate place such as the rear of the clam shell work machine A or is made to stand by at that place. It is used so that it will be discharged onto the loading platform of the earth and sand carrier.

At the time of this work, the operation of moving the clam shell 5 pulled up as shown in FIG. 3 to the place where the excavated earth and sand should be discharged is to rotate the swivel base b mounted on the vehicle body a. Done in.

Therefore, the raised clam shell 5 should be brought as close as possible to the swivel base b so that the swivel radius of the clam shell 5 when the swivel base b is swung can be made small so that the space required for work can be reduced. It is required to be narrow and improve workability.

However, since the upper end of the clam shell 5 is swingably suspended and supported by the connecting shaft 40 at the tip of the telescopic arm 4, the raising angle of the boom 3 is increased to increase the clam shell 5. When the vehicle is moved closer to the front surface of the swivel base b, the inertia of this operation causes it to sway back and forth, so that it moves toward the operator sitting on the seat d on the swivel base b. As a result, the operator is terrified, and due to the swing due to this inertia, the heavy clam shell 5 collides with the front side of the swivel base b, so that it is installed on the front side of the swivel b. There is a problem that the existing control device e is damaged.

Therefore, in the actual work, the boom 3 is erected only until the clam shell 5 is located far away from the front surface of the swivel base b, and the movement operation of the clutch shell 5 by the swivel of the swivel base b is performed. Although the turning radius is set to be fairly large, the centrifugal force generated during the turning operation causes the clam shell 5 to sway, and the operator feels fear.

To this end, a guard may be provided on the front surface of the swivel base b at a position where the clam shell 5 collides, but in order to support the heavy clam shell 5 that swings and collides. Since it must be made to have a considerable strength, it is difficult, and the part where the clam shell 5 collides is located on the rotation trajectory when the boom 3 is tilted and rotated. , Another problem comes to the point that workability is significantly impaired.

The present invention has been made in order to solve the problem occurring in the clam shell working machine in this way, and the operation when pulling up the clam shell 5 and moving it by rotating the swivel base b is small. It is safe and convenient to move the clam shell 5 closer to the swivel base b so that it can be moved with a turning radius, and the clam shell 5 is safely swung while being tightly bound to the swivel base b so that swinging does not occur. The purpose is to provide a new means of enabling the operation.

[0010]

[Means for Solving the Problems]

 As a means for achieving this object, the present invention provides a drive unit, a seat, and a control device on a swivel base rotatably mounted on the upper surface of a vehicle body traveling by a traveling device through a swivel mechanism. A crumb-ciel work machine in which a boom is rotatably supported around a fulcrum shaft, a telescorm is supported at the tip of the boom, and a clam-shell is oscillatedly suspended and supported at the tip of the boom. In the above, there is proposed a clam shell working machine characterized in that a clam shell support plate is provided on the front side of the swivel in front of the fulcrum shaft of the boom on both sides of the locus of fall of the boom.

[0011]

【Example】

 Next, embodiments will be described in detail with reference to the drawings. The same reference numerals are used for the constituent members having the same effects as those of the conventional means.

FIG. 4 is a side view of a clam-shell type working machine A in which the present invention is implemented. In FIG. 4, a is a vehicle body traveling by a traveling device 1 composed of crawlers, and b is a swivel mechanism 2 on the upper surface of the vehicle body a. A swivel mounted rotatably through the swivel, a drive unit including an engine and a hydraulic device mounted on the upper surface of the swivel b, d a seat, e a control device, 3 a fulcrum shaft 30 centered A boom mounted on the upper surface of the swivel b so as to rotate up and down, 4 is a telescopic arm supported on the tip end side of the boom 3, and 5 is swingably suspended on the distal end of the telescopic arm 4 via a connecting shaft 40. Clam shells that are suspended and supported, 6 is a bracket assembled and attached to the front end of the swivel base b, and 7 is a clam shell support plate that is pivotally supported in the left and right side portions of the bracket 6 about the support shaft 70 so as to be rotatable back and forth. , 8 is the class A damper for giving a resistance to the rotation of the Musiel support plate 7 and for urging it to rotate forward is shown.

A vehicle body traveling by the traveling device 1, a swivel b mounted on the upper surface of the vehicle via the swivel mechanism 2, a drive unit c mounted on the upper surface of the swivel b, a driver's seat d, and a control device e The boom 3, the telescopic arm 4 supported by the boom 3, and the clam shell 5 suspended and supported at the tip of the telescopic arm 4 are the same as those of the conventional clam shell work machine A.

As shown in FIG. 5, the bracket 6, which is assembled and attached to the front end of the swivel base b, is formed of steel into a channel shape having a width into which the base end of the boom 3 is fitted. Then, in front of the fulcrum shaft 30 of the boom 3, the base surface of the swivel base b is extended forward to a position where the base end side of the boom 3 tilted forward about the fulcrum shaft 30 is fitted. It is installed and attached.

Then, on the left and right side surfaces of the bracket 6, support shafts 70, 70 protruding leftward and rightward are mounted on the lower side portion on the tip end side. The bosses at the lower ends of the Kramusiel support plates 7 and 7 are rotatably fitted.

As shown in FIG. 5, each clam shell support plate 7 is formed in a vertically long arm shape, and a cushioning material 71 such as a rubber material is attached to the front surface side thereof. Then, on the rear surface side, a piston 81 is inserted into and retracted from a cylinder 80 in which oil is enclosed, and the cylinder 80 of the damper 8 comprising an oil damper provided with a spring 82 for urging the piston 81 toward the pushing side. Are integrally assembled, and the projecting end of the piston 81 thereof is abutted against the support member 72 fixedly mounted on the side surface of the bracket 6. Further, at the rear edge of the lower end of the clam shell support plate 7, there is provided a stopper 74 that abuts the lower surface side of a stopper pin 73 provided on the side surface of the bracket 6, whereby the clam shell support plate 7 is When the front side of it is held in an upright posture with a slight inclination to the front, and when it is tilted and rotated backward from this posture, a certain amount of braking is applied to that rotation to elastically rotate it. The clam-shell support plate 7 is designed to move, and when the clam-shell support plate 7 is rotated rearward by a load, it is pushed back by the spring pressure of the spring 82.

The embodiment apparatus configured as described above operates as follows. The clam shell 5 that has finished the operation of gripping the earth and sand is lifted to the height position facing the pair of clam shell support plates 7 and 7 provided on the front side of the swivel base b by the standing rotation of the boom 3. Then, from that state, the boom 3 and the telescopic arm 4 are operated so that the clam shell 5 approaches the swivel base b, and the clam shell 5 collides with the front surface of the clam shell support plates 7 and 7 as shown in FIG. Let's go.

As a result, the clam shell 5 causes the clam shell support plates 7, 7 to be tilted and rotated rearward about the support shafts 70, 70 due to the weight of the clam shell 5, and at this time, oil in the cylinder 80 of the damper 8 and The spring 82 is compressed. Then, due to the pushing back by the spring 82 and the weight of the clam shell 5, the clam shell is held integrally on the front surface of the clam shell support plate 7.

Next, the turntable b is turned from this state. At this time, the clam shell 5 is held integrally with it by the clam shell support plates 7 and 7, so that the clam shell 5 swings together with the swivel base b in a stable state without shaking. Therefore, the operator can bring the clam shell 5 closer to the front surface of the swivel base b and rotate with a smaller turning radius without causing fear that the heavy clam shell 5 swings toward the seat d. become.

[0020]

[Effect of the device]

 As described above, the clamshell work machine A according to the present invention is provided with the clamshell support plates 7 and 7 on the front side of the swivel base b in front of the fulcrum shaft 30 of the boom 3 and on both sides of the locus of the boom 3 fall. Therefore, the clam shell 5 that grabbed the earth and sand was lifted up to the height position that is located in front of the clam shell support plate 7 7 provided at the front end of the swivel b, and the front surface of the clam shell plate 7 7. When the clam shell 5 is brought into contact with the front surface of the swivel base b, the clam shell 5 is integrally held and held on the front surface of the clam shell support plate 7 by its weight, so that the clam shell 5 can be safely Moreover, it becomes possible to approach the front surface of the swivel base b and reduce the swivel radius without causing fear to the operator, and to prevent the operator from moving relative to the swivel base b. By the lifting state, also the displacement operation of the class Mushieru 5 performed by turning the swivel base b, safe, and becomes easy to perform so.

[Brief description of drawings]

FIG. 1 is a side view of a conventional clam shell working machine.

FIG. 2 is an explanatory diagram of a work state of the above.

FIG. 3 is an explanatory view showing a state in which the clam shell of the same is pulled up.

FIG. 4 is a side view of a clam shell working machine in which the present invention is implemented.

FIG. 5 is a perspective view of a main part of the above.

FIG. 6 is a side view of the main part of the same.

FIG. 7 is an explanatory diagram of the operation of the main part of the same.

[Explanation of symbols]

A ... Clam Ciel work machine, a ... Vehicle body, b ... Revolving base, c ...
Drive unit, d ... Seat, e ... Steering device, 1 ... Traveling device, 2 ...
Pivoting mechanism, 3 ... Boom, 30 ... Support shaft, 4 ... Telescopic arm, 40 ... Connection shaft, 5 ... Clam shell, 6 ... Bracket, 7 ... Clam shell support plate, 70 ... Support shaft, 71 ... Buffer member, 72 ... Support member , 73 ... Stopper pin, 74 ... Stopper, 8 ... Damper, 80 ... Cylinder, 81 ... Piston, 82 ... Spring.

Claims (1)

[Scope of utility model registration request] 1. A drive unit c, a driver's seat d, and a control unit e are mounted on a swivel base b mounted on a top surface of a vehicle body a traveling by a traveling device 1 via a swivel mechanism 2. A boom clam work machine A in which a boom 3 is rotatably and rotatably supported around a fulcrum shaft 30, a telescopic arm 4 is hung at the tip of the boom 3, and a clam shell 5 is swingably suspended and supported at the tip thereof. At swivel base b
A clam-shell working machine characterized in that clam-shell supporting plates 7 and 7 are provided on the front side of the boom 3 in front of the fulcrum shaft 30 and on both sides of the locus of rotation of the boom 3.