JPS6033182Y2 - excavator - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an excavator.

An excavator that excavates a vertical hole underground generally has a drive unit that carries a motor, speed reducer, etc. mounted on it along a guide rail on the front of a league mast that is installed upright on the working machine so that it can be raised and lowered.
An auger screw connected to the output shaft of this drive unit is used to drill holes into the ground.

However, in this type of excavator, when a hollow pile or the like is erected into a hard hole drilled by an auger screw, a press-fitting device such as a hydraulic jack is interposed at the lower part of the drive section.
There is one in which the upper part of the hollow pile is supported by this, and the hollow pile is press-fitted with a press-fitting device while drilling with an auger screw.

In an excavator equipped with such a press-in device, if earth and sand becomes compacted between the screw and the inside surface of the hollow pile or rocks are caught between the screw and the inside surface of the hollow pile during excavation with the auger screw, it is necessary to pull out the auger screw once. Because of this, a structure that allows the drive section and press-fitting device to be separated is required.

By the way, since the connection and disconnection between the drive unit and the press-fitting device is performed at the upper part of the league mast, it is not easy to do this manually. It has been proposed that
2-40765).

. However, the above proposal requires a configuration in which a wire rope is routed along the league mast, and the wire rope is pulled to insert and remove the pin from the connecting part between the drive unit and the press-fitting device, so the area around the league mast is complicated. Moreover, the frequency of connection and disconnection need only be done when a situation such as consolidation of earth and sand or rock encroachment occurs, as mentioned above, so it is possible to connect and disconnect by ground operation means as proposed above. It is not a good idea to implement a series of configurations that make this happen.

In view of this, it is an object of the present invention to provide an excavator that can automatically connect the drive part and the press-in device by utilizing the downward movement of the drive part only when the drive part is connected to the press-in device without any human intervention. This was done as a.

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

Figure 1 shows the arrangement of the excavator's drive unit and press-in device,
FIG. 2 is an enlarged plan view showing the connecting portion between the drive section and the press-fitting device in the present invention, and FIG. 3 is a front view thereof.

Both the drive unit 1 and the press-fitting device 2 are mounted so as to be movable up and down by a guide bracket 5.5.6.6 that is fitted into a guide rail 4 provided vertically in the front face of the leader mast 3. , a motor 7, and a reduction gear 8 are mounted on the tower, the press-fitting device 2 has a hydraulic jack 9 and a cap 11 that holds a hollow pile 10 (or casing), and the auger screw 12 passes through this press-fitting device 2 and connects to the drive unit. 1 output shaft.

□The drive unit 1 is placed on the top of the drive unit 1.
A sheave 14 around which a wire rope 13 is suspended.
In the present invention, the base is pivoted to a sheave block 17 which is pivotally supported by a shaft 16 to a bearing part 15 on the drive part 1, and is supported so as to be tiltable only to one side, and is provided with a stopper as appropriate to the other side. etc., so that it does not move sideways, and when tension is applied to the wire rope 13, it assumes a vertical position, and when the tension disappears, it is always tilted to one side as shown by the chain line. ing.

On the other hand, as shown in FIG. 2, a pair of left and right bearings 18.18 are vertically installed in the lower part of the drive unit 1, and a pair of bearings 18, 18 are provided between the plate materials to protrude above the pressure receiving part 2a of the press-fitting device 2. The bearing parts 18.19 are fitted with shaft holes which can match with each other.

The drive unit 1 is provided between the drive unit 1 and the press-fitting device 2.
An appropriate positioning stopper is provided so that when the drive unit 1 is lowered, the drive unit 1 is stopped at a position where the shaft holes of the bearings 18 and 19 match.

Note that the end of the bearing portion 18 or 19 may be used as the stopper.

A support tube 22 is horizontally fixed on the same axis as the shaft hole on the outer side of the bearing section 18.18 of the drive section 1, and the other end side of this support tube 22 is supported by a support plate 23. ing.

A connecting pin 24 is inserted into this support cylinder 22, and a compression spring 26 is interposed between this connecting pin 24 and the rear inner wall of the support cylinder 22, so that the connecting pin 24 has a protruding habit. is giving.

In the embodiment shown in FIG.
There are sheaves 27, 2 on the outer surface side of the support plate 23, 23 that supports the
7 is rotatably supported in a horizontal plane, and an operating sheave 28 is rotatably supported in the same horizontal plane at one corner of the press-fitting device 2, and an operating bundle 29 is attached to this sheave 28 in a radial direction. It is installed protrudingly.

A wire rope 3 is attached to the rear end of the connecting pin 24.
0.30 are respectively concatenated and 2. The ends of these wire ropes 30, 30 are tied to the operating sheave 28, and when the operating sheave 28 is rotated counterclockwise in the figure over a range from position A to position B, each wire When the rope 30.30 is wound up, the connecting pin 24.24 resists the springs 26, 26 and the bearing parts 18, 1
It is designed to come out through the shaft hole number 9.

At this winding end position B, the hole 31 drilled in the operating sheave 28 is configured to match the hole drilled in the fixed member side, and the lock pin 32 can be inserted into and removed from this from the vertical direction. There is.

The upper end of the lock pin 32 and the sheave block 17
The upper end of the sheave block 17 is connected to the sheave block 17 by a wire rope 34 that relays the sheave 33 installed in the drive unit 1.
The lock pin 32 is formed so as to come out of the hole in the operation sheave 28 when the operation sheave 28 moves sideways.

Next, the operation of the above embodiment will be explained.

During excavation with the auger screw 12, the screw 12
If earth and sand become compacted or rocks get stuck between the inner surface of the hollow pile 10 and the inner surface of the hollow pile 10, the drive unit 1 is stopped and the press-in device 2
When you climb up near the operating sheave 28 and rotate the operating sheave 28 from the A position to the B position in Fig. 2 while holding the operating bundle 29, the wire rope 30, 30 is wound around this operating sheave 28, and connected to it. Connecting pin 24.24
is pulled out from the shaft hole of the bearing part 18, 19 against the forces of the springs 26, 26, and the drive part 1 and the press-fitting device 2 are separated.

When the operating sheave 28 is rotated to the B position as described above,
The locking pin 32 penetrates into the hole 31 of this sheave 28, and locks the operating sheave 28 at the position B, and locks the connecting pin 28.
．． 24 is held in the state where it is pulled out.

After doing this, by raising only the drive unit 1, the auger screw 12 can be pulled out from the hollow pile 10, and consolidation of earth and sand or encroachment of rocks can be eliminated.

After the above-mentioned removal, if the drive part 1 is lowered, the shaft holes of the bearing part 18 of the drive part 1 and the bearing part 19 of the press-fitting device 2 will match and stop. Then, if the wire rope 13 is let out, the sheave block 17 is tilted by its own weight using the shaft 16 as a fulcrum as shown by the chain line.

As the wire rope 34 is pulled by this tilting, the lock pin 32 connected thereto is pulled up and removed from the hole in the operating sheave 28.

When this lock pin 32 comes out, the operating sheave 2
8 is released, the connecting pins 24.24 move forward due to the bias of the springs 26, 26, and their tips touch the bearing portion 18.
．． The drive unit 1 and the press-fitting device 2 are connected to each other by penetrating through the shaft hole 19.

In this embodiment, since the connecting pins 24, 24 can be inserted and removed from the side, there is no obstacle between the leader mast 3, the drive unit 1, and the press-fitting device 2.
Interference with other members in this portion can be avoided.

FIG. 4 shows another embodiment of the present invention. In this embodiment, a connecting pin 24 can be arranged between the league mast 3, the drive section 1, and the press-fitting device 2. There is a suitable device that can be adopted, and the structure is simplified by allowing the connecting pin 24 to be directly restrained by the lock pin 32.

That is, a lock pin guide 35 is vertically provided at the rear of the support cylinder 22, and the lock pin 32 is inserted into this guide 35.

The rear rod portion 24a of the connecting pin 24 has a
A pin hole 36 is drilled at a position corresponding to the lock pin guide 35 when the tip of the pin hole 36 is at least within the same plane as the inner surface of the bearing portion 18, and the lock pin 32 can be inserted therethrough. .

This pin 32 and sheave block 17 are connected to the drive section 1.
Wire rope 34 relaying sheave 33 installed in
The locking pins 32 are connected to each other by a locking hole 36 of the connecting pin 24 when the sheave block 17 is tilted.

In the figure, 37 is a stopper that limits the amount of movement of the connecting pin 24.

Next, the operation of the above embodiment will be explained.

During excavation with the auger screw 12, if earth and sand become compacted or rocks get stuck between the screw and the inside surface of the hollow pile, stop the drive unit 1, climb up near the press-in device 2 and pin the connecting pin. 24 from the shaft hole.

At this time, the lower end of the lock pin 32 is only in contact with the surface of the rear rod portion 24a of the connecting pin 24, so it can be freely pulled out and the lock hole 36 of the rod portion 24a
When the lock pin 32 reaches the position of the lock pin 32, the lock pin 32 penetrates the lock hole 36 due to its own weight, and holds the connecting pin 24 in the retracted position as shown in the fourth figure.

As a result, the auger screw 12 can be pulled out by raising only the drive unit 1 while leaving the press-fitting device 2 as it is.

If the drive unit 1 is lowered after eliminating the consolidation of earth and sand and the encroachment of rocks in this way, the shaft holes of the bearing part 18 of the drive part 1 and the bearing part 19 of the press-fitting device 2 will align and stop. However, when the wire rope 13 is further let out, the sheave block 17 is tilted about the shaft 16 as shown by the chain line in each figure.

As the wire rope 34 is pulled by this tilting, the lock pin 32 connected thereto is pulled up and removed from the lock hole 36 of the connecting pin 24.

When the lock pin 32 comes out, the connecting pin 24 moves forward due to the action of the compression spring 26, and its tip ends at the bearing part 18.
．． It is inserted into the shaft hole 19 as shown by the chain line in FIG. 4, and the drive unit 1 and the press-fitting device 2 are in a connected state, so that they can be pulled up together at the time of pulling up.

As explained above, in the present invention, when a problem such as soil consolidation or rock encroachment occurs during excavation, the connecting pin that connects the drive unit and the press-in device is manually removed, and the drive unit When the drive unit is lowered again after removing the obstacle by pulling up the chisel, it is automatically connected with the connecting pin,
Since the automatic coupling uses the tilting of the sheave block that suspends the drive part, the device for coupling can be installed in the area of the drive part, without complicating the structure of the excavator.

[Brief explanation of drawings]

Figure 1 is a side view showing the main parts of the excavator according to the present invention;
3 is a front view of the same, and FIG. 4 is a partially cutaway enlarged sectional view of another embodiment. 1... Drive unit, 2... Press-fitting device, 3.
... League mast, 4... Song guide rail, 7.
Song/motor, 8...Reducer, 9...Hydraulic jack, 10...Hollow pile, 11...
・Cap, 12...Song Augus Screw, 13,30
．． 34...Wire rope, 14.27.33
... Sheave, 15 ... Bearing part, 17.
...Sheave block, 18.19...Curved bearing part,
22...Support tube, 24, bending/connecting pin, 26
・Song/compression spring, 28...Operating sheave, 29
.....Operating bundle, 32..Lock pin, 36.asses pin hole.

Claims (1)

[Scope of utility model registration request] In an excavator equipped with a drive section that can be raised and lowered along a league mast and a press-in device such as a hollow pile, a sheave block of a sheave for suspending a wire rope that is installed on the top of the drive section and suspends the drive section is placed on one side. Formed so that it can be tilted only in the direction,
A connecting pin is provided on one side of the bearing part, which has a shaft hole that can freely match the shaft hole of the bearing part installed in the upper part of the press-fitting device, in the lower part of the drive part, and has a habit of protruding in the direction of the shaft hole. When the connecting pin is placed in the retreat position, a lock pin that restrains the connecting pin in that position is installed so as to be movable up and down, and the sheave block and the lock pin are connected by a cable, and when the sheave block is tilted. An excavator characterized in that the lock pin comes out, releases the restraint of the connecting pin, and is automatically inserted into the shaft hole of the bearing part.