JP2509533Y2 - Earth auger device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention disassembles an earth auger device for boring, piling, etc. in the ground by raising an earth auger along a leader mast supported by a boom. A device having a mold leader mast.

[Conventional technology]

Conventionally, as shown in FIG. 6, a hydraulic cylinder 8a is provided between the mast intermediate portion 3a pivotally supported by the boom A and the boom A, and the mast upper half portion 3b is fixed to the fixedly supported mast intermediate portion 3a. Then, the lower half 3c of the mast is connected to assemble the leader mast 3, and then the connecting pin 15 between the hydraulic cylinder 8a and the middle part 3a of the mast is pulled out so that the leader mast 3 can rotate about its own axis.
There is also an earth auger device for inserting the connecting pin 15 again and fixing and supporting the mast intermediate portion 3a by the hydraulic cylinder 8a to disassemble the leader mast 3 at the time of forwarding and storing.

[Problems to be solved by the device]

The insertion work of the connecting pin 15 is troublesome because it requires alignment of the pin holes of the hydraulic cylinder 8a and the mast intermediate portion 3a, but the present invention makes it easy to connect and separate the hydraulic cylinder to the intermediate portion of the mast. It is an object of the present invention to provide a device that can be surely held close to the abdomen of the boom A when the hydraulic cylinder is separated from the middle part of the mast.

[Means for solving the problem]

As shown in FIGS. 1 and 2, the present invention pivotally mounts a mast intermediate portion 3a by means of a boom A, and a rear end of a hydraulic cylinder 8 is attached to a shaft support body 9 provided on the abdomen of the boom A. And a slide link 10 having a slide portion S extending in the link direction at the rear is placed at the lower position of the hydraulic cylinder, and the front end of the slide link 10 and the front end of the hydraulic cylinder 8 are pivotally connected to each other to form a connecting frame. 11 is provided, the slide portion S is slidably connected to a fixed slider 12 mounted on the shaft support body 9, and a climbing surface B that descends to the boom side is provided at the back of the mast intermediate portion 3a, and an upper portion of the climbing surface is provided. A pin connecting portion C is provided on the slide portion 12, the slider 12 hits the front limit S1 of the slide portion, and the hydraulic cylinder 8 contracts to rotate upward together with the slide link 10 to approach the abdomen of the boom A. Releasably held by holding device E , The hydraulic cylinder 8 extends, rotates downward together with the slide link 10, the connecting frame 11 at the front end falls on the climbing surface B, and ascends along the climbing surface B, and the connecting frame 11 and the pin connecting portion C. This is an earth auger device configured so that and can be separably pin-coupled.

[Action]

When the assembly of the leader mast 3 is completed and the leader mast 3 is equipped with the earth auger 4, the ohm device 33
As shown in FIG. 5 (a), the pin 15 for connection is separated from the pin connecting portion C so that the leader mast 3 can rotate about its own axis by (FIG. 1), and the pin 15 of the hydraulic cylinder 8 is again provided. Attached to the connecting frame 11, the hydraulic cylinder 8 is reduced. Then, the fixed slider 12 hits the front limit S1 of the long hole of the slide portion S, the slide link 10 is rotated around the front limit S1 and the hydraulic cylinder 8 is pushed, and the hydraulic cylinder 8 is pushed by the horizontal pin 6.
Is rotated around the center of the slide link 10 together with the slide link 10 to approach the abdomen of the boom A. Then, the pin 15 is held by the holding device E as follows. That is, as shown in FIG. 5 (b), when the pin 15 enters the opening 16 of the holding device E and pushes the operating rod 21, the latch wheel D rotates forward (counterclockwise), and FIG. ) As shown in Fig.
While being chased by, it reaches the inner part 16a of the opening. At the same time, the stopper 26 on the disk cam 24 rises and falls 25
Fit in. As a result, the latch wheel D cannot be reversely rotated (clockwise), the pin 15 is captured by the pin receiving rod 22 and the opening inner portion 16a, and the hydraulic cylinder 8 slides the slide link 10 as shown in FIG. 5 (d). At the same time, the boom A is held in a raised posture. This holding prevents the forward tilting and lowering of the hydraulic cylinder 8 which is normally caused by the natural flow of oil over time. In order to release the holding device E, as shown in FIGS. 5 (e) and (f), the release cord 30 is pulled and the stopper plug is pulled out.
Remove 26 from falling step 25 of disc cam 24. In this state, when the hydraulic cylinder 8 is extended, the pin 15 moves forward, the pin receiving rod 22 is pushed down, the stopper plug 26 comes to the cam surface of the disc cam 24, and the latch wheel D rotates in the reverse direction. The pin receiving rod 22 sinks into the lower surface of the opening, and the operating rod 21 projects from the lower surface of the opening. When the hydraulic cylinder 8 extends, the fixed slider 12 leaves the front limit S1 and the hydraulic cylinder 8 rotates downward together with the slide link 10 as shown in FIG. The frame 11 lands on the climbing surface B and rises along the climbing surface B as the hydraulic cylinder 8 extends. Here, the pin 15 once removed is inserted and connected to the connecting frame 11 and the pin holes 15a and C1 of the pin connecting portion C. Here, the fork fork 32 and the earth auger 4 in FIG. 1 are removed, then the lower half 3c of the mast is separated, the hydraulic cylinder 8 is contracted, and the lower part of the middle portion 3a of the mast is pulled toward the boom A to move the boom A. The leader mast 3 is pulled down to separate the upper half 3b of the mast, and the disassembly of the leader mast 3 is completed. Assembly of the leader mast 3 is performed in the reverse operation to the above.

〔Example〕

A detailed description will be given of an embodiment of the present invention. In FIG. 1, A is a boom, and a rotating machine base 1 on a crawler 2 with a pin 5 is used.
It is pivotally attached to the front part, and at the upper end of boom A, the mast middle part 3a,
A mast middle portion 3a of the leader mast 3 which can be disassembled into an upper half mast 3b and a lower half 3c is pivotally supported so as to be swingable back and forth. Four
Is an earth auger (excavator) that moves up and down along the leader mast 3. As shown in FIG. 2, reference numeral 9 is a shaft support main body provided on the abdomen of the boom A. The rear end of the hydraulic cylinder 8 is pivotally attached to the shaft support main body 9 by a lateral pin 6.
In the lower position of the hydraulic cylinder (rod) front end,
A front end of a slide link 10 provided with a slide portion S having a long hole extending substantially in the link direction at a rear portion of the link is pivotally attached by a pin 7. 11 is a connecting frame connected to this pin 7 and has a pin hole.
15a is provided. Then, a pin-shaped fixed slider 12 mounted on a shaft support body 9 is fitted into the slide portion S at a position below the horizontal pin 6 at the rear end of the hydraulic cylinder to slidably connect the both. B is a climbing surface provided on the back of the mast intermediate portion 3a so as to descend toward the boom side, and a pin connecting portion C having a pin hole C1 is provided on the upper side (biting) of the climbing surface B. When the hydraulic cylinder 8 extends and the connecting frame 11 climbs up the climbing surface and reaches the end, the pin holes are aligned with each other, and the pin 15 is inserted and connected. E is a holding device for the hydraulic cylinder 8, which is shown in FIGS. 3 and 4. 17 is boom A
The main body of the holding device fixedly provided with a U-shaped opening 16 for receiving the pin 15 for connection when the hydraulic cylinder 8 is rotated upward and approaches. Instead of the pin 15, a horizontal pin separately fixed to the cylinder portion of the hydraulic cylinder 8 may be used. Reference numeral 18 denotes a shaft which is axially mounted on the side plate 19 in a space 20 between main body side plates 19 which is opened toward the opening. The shaft 18 has an operating rod 21 on the back side of the opening and a pin receiver on the opening side. A boss portion 23 of a latch wheel D having a rod 22 integrally projected is pivotally mounted. The pin receiving rod 22 is formed to have a shape surrounding the pin 15 so as to face the inner part 16a of the opening, and the operating rod 21 is formed so as to face the pin receiving rod 22 and contact the pin 15. Reference numeral 24 is a disc cam formed on the lower surface of the boss portion 23 so as to start at the base of the pin receiving rod 22 and end at the falling step 25. A stopper plug 26 is vertically slidably fitted into a bottomed vertical hole 28 of a plug receiving body 27 fixed to a side plate of the body, and is biased upward by a coil spring 29 at the bottom of the hole. When it is on the cam surface of, it descends when it reaches the drop step 25 and fits into the drop step, and the pin receiving rod
Stop the return of 22. Reference numeral 30 is a release cord that is connected to the lower end of the stopper plug 26 and hangs down from the bottom hole. When the release cord is pulled, the stopper plug 26 is removed from the falling step 25.

The holding device E has a structure that can catch the pin 15 in a snap type. However, if the holding device E can prevent the hydraulic cylinder 8 from naturally descending forward, the hydraulic cylinder 8 or a part of the slide link 10 is boomed. It may be pinned to the side.

In FIG. 1, reference numeral 31 is a boom hoisting hydraulic cylinder. 32
Is a catch fork pivotally attached to the machine base 1, and its front end is connected to the lower end of the leader mast 3. Reference numeral 33 is an ohmic device that rotates the leader mast 3 about its own axis and changes its position to the earth auger 4.

[Effect of device]

According to the present invention, the rear end of the hydraulic cylinder 8 is pivotally attached to the shaft support body 9 of the abdomen of the boom A, and the slide link 10 is placed at the lower position of the hydraulic cylinder. A connecting frame 11 is pivotally attached to the front end, and a slide portion S at the rear portion of the slide link 10 is slidably connected to a fixed slider 12 mounted on a pivot body 9, and a climbing surface is provided on the back of the mast intermediate portion 3a. A pin connecting part C is provided on the upper part of B, the slider 12 abuts on the front limit S1 of the slide part, and the hydraulic cylinder 8 is contracted, so that
Since it is rotated together with the boom A abdomen and held by the holding device E of the boom A abdomen, normally,
This holding prevents the hydraulic cylinder 8 from leaning forward due to the natural flow of oil over time. Further, the hydraulic cylinder 8 extends and rotates downward together with the slide link 10, so that the connecting frame 11 at the front end falls on the climbing surface B and ascends along the climbing surface B and the connecting frame 11 and the pin connecting portion C. Since and can be separably pin-coupled, connection and separation to the middle portion of the mast of the hydraulic cylinder becomes easy.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is an enlarged side view of an essential part of the same, FIG. 3 is an enlarged side sectional view of a holding device, and FIG. 4 is a state in which a hydraulic cylinder is held. 5 is a side view of the same portion of FIG. 5, FIG. 5 (a) (b) (c) (d) (e) (f)
(G) is a simplified explanatory view showing the action of the main part, and FIG. 6 is a side view of a conventional example. In the figure, A ... boom, B ... climbing surface, C ... pin connecting portion, C1 ... pin hole, D ... latching wheel, E ... holding device,
S …… Slide part, S1 …… Preliminary limit, 3 …… Leader mast, 3a …… Mast middle part, 8 …… Hydraulic cylinder, 9 ……
Shaft support body, 10 …… Slide link, 11 …… Connection frame, 12…
… Fixed slider, 15 …… Coupling pin, 15a …… Pin hole, 16 …… Opening part, 21 …… Operating rod, 22 …… Pin receiving rod,
24 …… Disc cam, 25 …… Falling stage, 26 …… Stopper

Claims (1)

(57) [Scope of utility model registration request] 1. A boom (A) pivotably mounts a mast intermediate portion (3a), and a rear end of a hydraulic cylinder (8) is pivotally mounted on a pivot body (9) provided on the abdomen of the boom (A). A slide link (10), which has a slide part (S) at the rear, which is worn and extends in the link direction, is placed at the lower position of the hydraulic cylinder,
A fixed slider in which a front end of the slide link (10) and a front end of a hydraulic cylinder (8) are pivotally attached to each other to provide a connecting frame (11), and the slide portion (S) is mounted on a shaft support body (9). (1
It is slidably connected to 2), the climbing surface (B) that descends to the boom side is provided on the back of the middle part (3a) of the mast, and the pin connecting portion (C) is provided on the upper part of the climbing surface. The slider (12) hits the limit (S1), the hydraulic cylinder (8) shrinks, and it rotates up together with the slide link (10) to approach the abdomen of the boom (A) and hold the abdomen of the boom (A). Releasably held by the device (E), the hydraulic cylinder (8) extends, rotates downward together with the slide link (10), and the connecting frame (11) at the front end lands on the climbing surface B.
Further, the earth auger device is constructed so as to rise along the climbing surface so that the connecting frame (11) and the pin connecting portion (C) can be separably connected by a pin.