JP2873623B2 - Earth auger equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a disassembled earth auger device that lifts and lowers an earth auger or the like along a leader mast supported by a boom to pierce or stake the ground. Device with a mold-type leader mast.

[Conventional technology]

Conventionally, as shown in FIG. 6 (for example, a device described in Japanese Utility Model Publication No. 56-040949), the mast intermediate portion 3a of the leader mast 3
Is pivoted by a boom A so as to be able to move up and down, and a hydraulic cylinder 8a is interposed between the inner crotch of the boom A and the mast intermediate portion 3a. When assembling the leader mast 3, the mast intermediate portion 3a and the mast upper half portion 3b , Connect the lower half 3c of the mast, etc.
The connecting pin 15a is pulled out to enter the excavation state so that the leader mast 3 can rotate on its own axis by the ohm device (37 in FIG. 1), and the hydraulic cylinder 8a and the mast intermediate portion 3a are connected at the time of forwarding and storing. An earth auger device is provided, which is coupled by a pin 15a so that the leader mast 3 can be disassembled.

[Problems to be solved by the invention]

In the conventional example, when disassembling the leader mast, the hydraulic cylinder
When connecting the front end of the hydraulic cylinder 8a to the front end of the mast intermediate portion 3a with the connecting pin 15a, first align the hole of the rod end of the hydraulic cylinder 8a with the hole of the mast intermediate portion 3a, and connect the connecting pin 15a to both holes. However, since the alignment of the pin holes is done manually, and because the work is performed at a high place on the mast,
It was extremely troublesome and dangerous. SUMMARY OF THE INVENTION The present invention has been made to solve the problems of this conventional example, and the connection and disconnection operation of a hydraulic cylinder for disassembling and assembling a leader mast and a mast intermediate portion by a connecting pin is easy and safe, and the hydraulic cylinder after separation is provided. It is an object of the present invention to obtain an earth auger device having a good fit.

[Means for solving the problem]

As shown in FIGS. 1 and 2, the present invention relates to an earth auger device in which an earth auger or the like moves up and down by being guided by a disassembled leader mast 3 supported by a boom A. A slide having a mast intermediate portion 3a pivotally attached thereto, a rear end of a hydraulic cylinder 8 pivotally attached to a boom-side support main body 9 provided on the abdomen of the boom A, and a slide portion S extending in the longitudinal direction of the link at the rear portion. Link
10 is placed at the lower position of the hydraulic cylinder, a front end of the slide link 10 is pivotally connected to a front end of the hydraulic cylinder 8 to provide a connection frame 11, and the slide portion S is located at a position below the rear end of the hydraulic cylinder 8. It is slidably connected to the fixed slider 12 mounted on the boom-side supporting body 9, and a climbing surface B is provided on the back of the mast intermediate portion 3a, which descends toward the boom, and a pin connecting portion C is provided on an upper portion of the climbing surface. When the slider 12 hits the front limit S1 of the slide portion and the hydraulic cylinder 8 contracts, the hydraulic cylinder 8 rises and rotates together with the slide link 10 so that the hydraulic cylinder 8 can approach the abdomen of the boom A and extend the hydraulic cylinder 8. In response to this, the hydraulic cylinder rotates down together with the slide link 10 so that the connecting frame 11 at the front end of the hydraulic cylinder 8 comes down on the climbing surface B, and rises along the climbing surface to move with the connecting frame 11 and the pin. The connection part C is connected This is an earth auger device which can be detachably connected by connecting pins 15.

[Action]

When the assembling of the leader mast 3 is completed, the fork 36 is connected to the leader mast, and in the excavation work state where the earth auger 4 is mounted, the hydraulic cylinder 8 is contracted as shown in FIG. The fixed slider 12 hits the front limit S1 of the elongated hole of the slide portion S, and the hydraulic cylinder 8 is pushed while the slide link 10 rotates around the front limit S1,
Hydraulic cylinder 8 slides around horizontal pin 13
It rotates upward together with 10 and is close to the abdomen of the upper arm 6 of the boom A. When the excavation work is completed and the leader mast 3 is disassembled, as shown in FIG. 5 (b), when the hydraulic cylinder 8 is extended, the fixed slider 12 leaves the front limit S1 and the hydraulic cylinder 8 is moved to the slide link. As shown in FIG. 5C, the connecting pin 15 of the connecting frame 11 of the hydraulic cylinder 8 comes down on the climbing surface B as shown in FIG. The connecting pin 15 that has been raised along the climbing surface B as the hydraulic cylinder 8 extends is connected to the pin connecting portion C in a separable manner. More specifically, as shown in FIG.
Pushes up the operating rod 23, the latch wheel D rotates forward (clockwise), and the connecting pin 15 is surrounded by the pin receiving rod 22 following the pin lower part as shown in FIG. 5 (e). And reaches the pin receiving semicircular surface 16. At the same time, the stopper 27 on the disk cam 25 rises and fits into the falling step 26. As a result, the latch wheel D cannot rotate backward (counterclockwise), and the connecting pin 15 is captured by the pin receiving rod 22 and the pin receiving semicircular surface 16. Then, the catch fork 36 and the earth auger 4 in FIG. 1 are removed, the lower mast half 3c is separated, the hydraulic cylinder 8 is reduced, and the lower part of the mast middle part 3a is drawn to the boom A, and the boom A is moved. The mast upper half 3b is separated by moving it forward, and the disassembly of the leader mast 3 is completed. The assembling of the leader mast 3 is performed by the reverse operation. In order to disengage the connecting pin 15 from the pin connecting portion C at the end of the assembly, as shown in FIGS. 5 (f) and 5 (g), the release cord 30 is pulled and the stop plug 27 is moved down the disc cam 25. Remove from 26. When the hydraulic cylinder 8 is reduced in this state, the pin receiving rod 22 is pushed down by the connecting pin 15 and
Comes to the cam surface of the disc cam 25, the latch wheel D rotates in the reverse direction, the pin receiving rod 22 sinks below the climbing surface B, and the operating rod 23 projects from the climbing surface B. Then, as shown in the original FIG. 5 (a),
The hydraulic cylinder 8 shrinks, rotates upward with the slide link 10 about the horizontal pin 13 and fits close to the abdomen of the upper arm 6 of the boom A.

Further, when the mast intermediate portion 3a is attracted to the boom A by reducing the hydraulic cylinder 8, the front limit S1 of the slide portion S is received by hitting the fixed slider 12, so that the hydraulic pressure can be maintained even when the fork 36 is not supported. The forwardly inclined leader mast 3 can be reliably held only by the cylinder 8 and the slide link 10.

〔Example〕

One embodiment of the present invention will be described in detail with reference to the drawings. In FIG. 1, A is a boom consisting of a double arm, which is composed of an upper arm 6 and a lower arm 7 which are flexibly connected by a pin 5. The lower end of the lower arm 7 is crawled by a pin 5a parallel to the pin 5. At the upper end of the upper arm 6, the mast middle part 3a, the upper half mast 3b, the lower half 3c
A mast intermediate portion 3a of the leader mast 3, which can be disassembled into a plurality of parts, is pivotally supported so as to swing back and forth. Reference numeral 4 denotes an earth auger (digging tool) that moves up and down along the leader mast 3. As shown in FIG. 2, reference numeral 9 denotes a double clevis-shaped boom-side support body provided on the abdomen of the upper arm 6 of the boom A. The rear end of the hydraulic cylinder 8 is attached to the support body 9 by a horizontal pin 13. Pivoted by
At the lower position of the hydraulic cylinder 8, the front end of the (rod) front end of the hydraulic cylinder and the front end of a slide link 10 having a slot-shaped slide portion S extending substantially in the link direction at the rear portion of the link are pivotally connected by pins 14. Reference numeral 11 denotes a connection frame connected to the pin 14, on which a connection pin 15 is separately mounted. A pin-shaped fixed slider 12 mounted on the boom-side shaft support body 9 is fitted into the slide portion S below the horizontal pin 13 at the rear end of the hydraulic cylinder, and both are slidably connected to each other. The fixed slide may be formed as a swinging cylindrical body, and the slide portion may be formed as a long plate slidably inserted therein. B is a concave climbing surface provided on the back of the mast intermediate portion 3a so as to be lowered toward the boom side, and a pin connecting portion C is provided on the upper side (by biting) of the climbing surface. The climbing surface may be a slope. Hereinafter, the configuration of the pin connecting portion C will be described in detail with reference to FIGS. The climbing surface B is the side plate of the climbing surface body 18.
31 is formed on the front edge. Reference numeral 16 denotes a pin receiving semicircular surface following the upper portion of the climbing surface B, which is formed inside a hook-shaped portion 17 integrally provided on the upper portion of the climbing surface main body 18. Reference numeral 20 denotes a shaft which is supported by the side plate 31 in a space 21 between the side plates 31 whose front is open. The shaft 20 has an operating rod 23 projecting upward and a pin receiving rod 22 projecting downward. The boss 24 of the latch wheel D is pivotally mounted. The pin receiving rod 22 is formed to have an arc surface surrounding the connecting pin 15 facing the pin receiving semicircular surface 16, and
23 is formed in a state of facing the pin receiving rod 22 and contacting the connecting pin 15. Reference numeral 25 denotes a disc cam formed on the lower surface of the boss 24 so as to start from the base of the pin receiving rod 22 and end at the falling step 26. Reference numeral 27 denotes a stopcock which is vertically slidably fitted into a bottomed vertical hole 28 of a stopper receptacle 18b fixed to the back plate 18a of the climbing surface main body 18, and is urged upward by a coil spring 29 at the bottom of the hole. Then, it descends when it is on the cam surface of the disc cam 25, rises when it reaches the falling step 26, fits in the falling step, and stops the return of the pin receiving rod 22. Reference numeral 30 denotes a release cord which is connected to the lower end of the stopper 27 and hangs down from the bottom hole 32. When the rope is pulled, the stopper 27 comes off the falling step 26.

In FIG. 1, reference numeral 33 denotes a boom raising / lowering hydraulic cylinder provided between the front end of the extension rod 34 fixed to the upper part of the lower arm 6 and the rotating machine base 1, and 35 denotes a front end of the extension rod 34. , Upper arm 6
And a hydraulic cylinder for raising and lowering the upper arm 6 provided between the upper and lower arms. 36 is a fork attached to the front of the machine 1
The front end is connected to the lower end of the leader mast 3. An ohm device 37 rotates the leader mast 3 on its own axis.

〔The invention's effect〕

The present invention relates to a boom-side support main body 9 provided on the abdomen of the boom A.
And a slide link 10 having a rear end provided with a slide portion S which pivotally connects the rear end of the hydraulic cylinder 8 and extends in the longitudinal direction of the link.
At the lower position of the hydraulic cylinder, and pivotally connect the front end of the slide link 10 and the front end of the hydraulic cylinder 8 to form a connection frame.
The slide section S is slidably connected to a fixed slide 12 mounted on the boom-side support body 9 at a position below the rear end of the hydraulic cylinder 8 so as to climb to the back of the mast intermediate section 3a toward the boom. A surface B is provided, and a pin connecting portion C is provided above the climbing surface. When the connecting frame 11 and the pin connecting portion C are connected by the connecting pin 15, the disassembly and assembly of the leader mast 3 is performed. When the hydraulic cylinder 8 is contracted due to the disconnection of the connecting pin 15, the hydraulic cylinder rises and rotates together with the slide link 10 to fit close to the abdomen of the boom A. The connecting frame 11 at the front end of the hydraulic cylinder 8 comes down on the climbing surface B, and rises along the climbing surface, so that the connecting frame 11 and the pin connecting portion C can be separably connected by the connecting pin 15. For disassembly and assembly of leader mast The connection and separation work between the hydraulic cylinder and the mast intermediate part is easy and safe. This connection and separation and the fitting of the hydraulic cylinder are performed almost automatically, and the holding force of the mast intermediate part by the hydraulic cylinder is strong. Having.

[Brief description of the drawings]

FIG. 1 is a side view of one 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 climbing surface and a pin connection part, and FIG. Front view, FIG. 5 (a)
(B), (c), (d), (e), (f), and (g) are simplified explanatory views showing the operation of the main parts, and FIG. 6 is a side view of a conventional example. In the figure, A: Boom, B: Climbing surface, C: Pin connecting part, D: Latch car, S: Sliding part, S1: Front limit, 3: Leader mast, 3a: Mast middle part , 8 ...
Hydraulic cylinder, 9 ... Body support body, 10 ... Slide link, 11 ... Connection frame, 12 ... Fixed slide, 15 ... Connection pin

Claims (1)

(57) [Claims] In an earth auger device in which an earth auger or the like is moved up and down by being guided by a disassembled type leader mast (3) supported by a boom (A), a middle part (mast) of which a front and rear swing can be freely changed by a boom (A). 3a), and the rear end of the hydraulic cylinder (8) is pivotally attached to the boom-side support body provided at the abdomen of the boom (A), and has a slide portion (S) at the rear portion extending in the longitudinal direction of the link. Slide link (10)
At the lower position of the hydraulic cylinder, and pivotally connect the front end of the slide link (10) and the front end of the hydraulic cylinder (8) to provide a connection frame (11). (8) A climbing surface (B) which is slidably connected to a fixed slide (12) which is mounted on a boom-side support body (9) at a position below the rear end, and which is lowered toward the boom at the back of the mast intermediate portion (3a). ) Is provided, and a pin connecting portion (C) is provided above the climbing surface. When the slider (12) hits the front limit (S1) of the sliding portion and the hydraulic cylinder (8) is reduced, the same is applied. Hydraulic cylinder (8) is slide link (10)
The hydraulic cylinder (8) can be moved upward together with the slide link (10) to rotate downward along with the slide link (10) in response to the extension of the hydraulic cylinder (8).
1) arrives at the climbing surface B and rises along the climbing surface, and the connecting frame (11) and the pin connecting portion (C) are connected to the connecting pin (15).
Earth auger device which can be separated and connected by