JPS64469Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an earth auger locking device for a hole-drilling pole-erecting vehicle that is interlocked with the setting of the earth auger.

With conventional earth auger locking devices, if the earth auger is set with the tip boom extended even slightly, the locking becomes uncertain, and the auger support is not locked to either the tip boom or the proximal boom. If you extend the tip boom in this state, the auger support will come out as the tip boom extends due to the frictional resistance between the tip boom and the auger support, and the auger support may fall due to shocks such as boom shaking. , there was a risk of an accident.

The present invention was developed in view of the above circumstances, and the auger support is always locked to either the tip boom or the base boom, regardless of whether the tip boom is extended or contracted, making it uncertain whether the auger support is locked. An object of the present invention is to provide an earth auger locking device for a hole-drilling and pole-erecting vehicle that allows work to be carried out safely without causing damage.

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 shows a side view of a hole-drilling pole-erecting vehicle, in which a telescopic boom 3 is pivotally supported on a revolving base 2 placed on a vehicle body 1, and the telescopic boom 3 is raised and lowered by the expansion and contraction of a luffing cylinder 4. It is expanded and contracted by an expansion and contraction device (not shown). An auger support 5 for supporting an earth auger 6 is attached to the outer periphery of the tip boom 3'' of the telescopic boom 3 so as to be slidable in the axial direction of the tip boom 3'', and one end of the auger arm 7 is below the auger support 5. is pivoted to be rotatable around an axis parallel to the axis of the base end boom 3', and an earth auger 6 is pivotally supported at the other end of the auger arm 7, and when not in use, the earth auger 6 is rotated as shown in the figure. It is stored on the side of the proximal end boom 3'.

Figure 2 shows the main parts of the earth auger locking device.
A crank 9 is attached to the shaft 16 on the underside of the auger support 5.
The crank 9 has engaging parts 10 and 11 at both ends thereof, and these engaging parts 10 and 11 protrude from the side surface of the head 8 at the tip of the tip boom 3''. It is formed to selectively engage with a pin 17, which is an engagement piece provided, and a hook 13, which is an engagement piece pivotably supported in a vertical plane on the lower surface of the proximal boom 3', respectively. The crank 9 is biased clockwise in the figure by a spring 15 installed between it and the auger support 5.The hook 13 has an engaging portion 18 at one end, and a spring 14
Therefore, the engaging portion 18 is always connected to the engaging portion 11 of the crank 9.
is biased in the direction of engagement. A protruding portion 12 is formed at the front of the upper surface of the crank 9, and this protruding portion 12 allows the auger support 5 to be attached to the auger support 5 when the tip boom 3'' is extended while the auger support 5 is locked to the proximal boom 3'. When the tip boom 3'' is not located at the tip of the tip boom 3'', it comes into slidable contact with the bottom surface of the tip boom 3'' and prevents the crank 9 from swinging, causing the auger to move as when the tip boom 3'' is fully retracted. Only when the support 5 is located at the tip of the tip boom 3'', the contact with the lower surface of the tip boom 3'' is released to allow the crank 9 to swing in the clockwise direction. An earth auger 6 is provided on the lower surface of the crank 9 on the engaging portion 11 side.
Cam 1 attached to auger arm 7 when retracting
The upper surface of the crank 9 is in contact with the crank 9, and the crank 9 is rocked counterclockwise against the biasing of the crank 9 by the spring 15.

With the above configuration, when performing crane work with the earth auger 6 held in the retracted position, the auger arm 7 is rotated and raised, as shown in FIG. Since the crank 9 is held in contact with the lower surface of the base boom 3', the crank 9 is swung counterclockwise against the spring force of the spring 15, pushing up the engaging portion 11 and locking the hook 13 on the lower surface of the proximal boom 3'. A pin 1 with an engaging portion 10 protruding from the head 8 at the tip of the tip boom 3''
Remove from 7. In this state, the auger support 5 is locked to the proximal boom 3'.

Next, when setting the earth auger 6 with the tip boom 3'' fully contracted, rotate the auger arm 7 to lower it as shown in Figure 4, and move the earth auger 6 from the storage position to the working position. When set, the crank 9 is swung clockwise by the spring 15, the engagement between the engagement portion 11 and the hook 13 is released, and the engagement portion 11 is engaged with the pin 17. In this state, the auger The support 5 is locked to the tip boom 3'', and the auger support 5 and the tip boom 3'' slide together.

Next, as shown in Fig. 5, when the earth auger 6 is set with the tip boom 3'' extended, the auger arm 7 is rotated and lowered to move the earth auger 6 from the storage position to the working position. Even when set, the protrusion 12 of the crank 9 comes into contact with the lower surface of the tip boom 3'' and prevents the crank 9 from swinging clockwise against the spring force of the spring 15. Since the auger support 5 is held engaged with the hook 13 and is locked to the proximal boom 3', the auger support 5 will not move as the tip boom 3'' extends.From this state, the tip When the boom 3'' is fully retracted, the contact between the protrusion 12 of the crank 9 and the lower surface of the tip boom 3'' is released.
The crank 9 is swung clockwise by the spring 15, and the engagement between the engagement part 11 and the hook 13 is released, and the engagement part 10 and the pin 17 are engaged, and the auger support 5 is moved to the tip boom 3. ” to lock it.

As described above, according to the present invention, the auger support is always locked to the proximal boom or the tip boom due to the simple and reliable configuration, and the fall of the earth auger that occurs due to uncertain locking of the auger support. Therefore, there is provided an earth auger locking device for a hole-drilling and pole-erecting vehicle that is prevented and has excellent safety.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a side view of a digging and pole-erecting vehicle, Fig. 2 is a detailed view of the earth auger locking device, Fig. 3 is a plan view of Fig. 2, and Fig. 4. 5 is a state diagram in which the earth auger locking device is locked to the tip boom, and FIG. 5 is an explanatory diagram of the operation. 5...Auger support, 7...Auger arm,
9...Crank, 10, 11...Engaging portion, 12...
...Protrusion, 13...Hook, 17...Pin, 19
……cam.

Claims (1)

[Scope of utility model registration request] An auger support is slidably attached to the outer periphery of the tip boom of a multi-stage telescoping boom that is pivotably supported on a rotating base, and engagement pieces are provided on the side of the head of the tip boom and in front of the proximal boom. A crank having engaging parts at both ends that selectively engages with the joint piece is swingably mounted on the auger support,
When the auger support is not located at the tip of the tip boom, the auger support slidably contacts the lower surface of the tip boom protruding from the front side of the auger support to prevent the crank from swinging, and the auger support is positioned at the tip of the tip boom. Provided on the crank is a protrusion that releases contact with the bottom surface of the tip boom and allows the crank to swing only when the crank is located at the tip of the boom,
An earth auger for a drilling pole erection vehicle, characterized in that when the auger support is not located at the tip of the tip boom, the crank is held in an engaged state with an engagement piece of the base boom. Locking device.