JPH0316949Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a hole-drilling pole erection device with a telescopic boom.
More specifically, the present invention relates to a safety device for preventing an auger device from accidentally falling off or moving from a telescopic boom in a hole digging and pole erection device with a telescopic boom.

(Prior Art) FIGS. 8 and 9 show the auger device mounting portion of a conventional hole-drilling and pole-erecting device with a telescopic boom. In this conventional drilling and pole erection device with a telescopic boom, an auger support 121 for supporting the auger device 102 is slidable in the length direction of the top boom 113.
When using this auger device 102, the auger support 121 is locked and fixed to the tip of the top boom 113 by the locking device 103, and when performing crane work without using the auger device 102, the auger support 121 is 121 can be locked and fixed to the base boom 111 side. That is, the locking device 103 has a lever 131 provided with locking claws 132 and 133 at both ends, respectively, with the lever 131 facing in the direction of boom extension and retraction, and the intermediate portion of the lever 131 being pivoted to the auger support 121 with a pin 134. , a locking receiving part 135 is provided at the lower end of the base boom 111 to which the base side locking claw 132 of the lever 131 can be removably locked, and the top boom 1
At the tip of the lever 131 there is a locking claw 133 on the front side of the lever 131.
A lock receiving portion 16 is provided which can be locked in a detachable manner. The lever 131 is biased upward on the distal locking claw 133 side by a spring 137 (therefore, the base locking claw 132 side is biased downward);
Further, the front locking claw 133 side is pushed down against the spring 137 by the cam 138 provided on the auger device support shaft 124 of the auger support 121 (the base locking claw 132 side is pushed upward). It's becoming like that. When the telescopic boom 101 is fully retracted and the auger device 102 is in the retracted state (attitude indicated by reference numeral 102 in FIGS. 8 and 9), the cam 138 causes the proximal locking claw 132 side of the lever 131 to spring. 137 and is pushed upward against the proximal locking claw 132.
is locked in the base boom side locking receiver 135 (the tip side locking claw 133 is locked in the top boom side locking receiver 136
), and in the operating position of the auger device 102 (the position indicated by the chain line 102'), the pressing force on the cam 138 against the lever 131 is released, and the front locking claw 133 side is pulled upward by the spring 137. The front locking pawl 133 is locked to the top boom side locking receiving part 136 (the base side locking pawl 132 is disengaged from the base boom side locking receiving part 135).

However, in the auger support support structure of this conventional drilling and pole-erecting device with a telescopic boom, even though the telescopic boom 101 is not fully retracted (for example, the top boom is at the position indicated by the chain line 113')
When an operator mistakenly assumes that the telescopic boom 101 is fully retracted and operates the auger device 102 from the retracted position to the operating position as shown by reference numeral 102', the distal engagement of the lever 131 Even if the locking claw 133 side is moved upward by the spring 137, the tip locking claw 133 is not engaged with the top boom side locking receiver 136 (the base locking claw 132 is not engaged with the top boom side locking receiver 136). 135),
When the top boom 113 is extended in this state, the auger support 121 (and the auger device 102) is moved toward the top boom 113 as shown by reference numeral 121'.
At the same time, the boom can be moved in the direction of extension. In this state, the auger support 121 is not fixed to either the top boom 113 or the base boom 111 and is in an unstable state, and the auger support 121 (and auger device) is attached to the top boom 11 when the top boom is raised.
There was a risk that the vehicle would move along 3. In addition, in the auger support support structure of this conventional drilling and pole-erecting device with a telescopic boom, when the auger device 102 is in the operating position, the front locking pawl 13 of the lever 131 is
3 is locked to the top boom side locking receiver 136 only by the biasing force of the spring 137, so if the spring 137 breaks while the auger device is in use, the tip side locking pawl 133
The auger support 121 may become unfixed to either the top boom or the base boom.

(Purpose of the invention) In view of the above-mentioned problems with the auger support support structure in the conventional drilling and pole erection equipment with a telescopic boom, the invention was developed in such a way that if the locking device were to come off the top boom side when the auger equipment was in the operating position. The object of the present invention is to propose a safety device for a hole-drilling and pole-erecting device with a telescoping boom, which ensures that the auger support is fixed to the top boom side even when the auger support is fixed to the top boom side.

(Means for Achieving the Purpose) The safety device of the drilling and pole-erecting device with a telescopic boom of the present invention includes a telescopic boom having a top boom that is extendable and retractable with respect to a base boom, and a telescopic boom that is attached to the telescopic boom via an auger support. and an auger device, and the auger support can be selectively locked and fixed by a locking device to the top boom side when the auger device is in use, and to the base boom side when the auger device is not in use. In the drilling and pole erection device with a telescopic boom, an engaging member provided on the auger support side and an engaging member provided on the top boom side are removably engaged between the auger support and the top boom. and a receiving member that fits together, and when the auger support moves forward together with the top boom in a state where the auger support is located at a predetermined position on the top boom tip side when the auger device is in use, the engagement member The retaining member is maintained in an engaged state with respect to the receiving member, and when the boom is fully retracted, the engaging member is disengaged from the receiving member by a disengaging operation member provided on the base boom side. The device is characterized in that it is provided with an auxiliary locking device.

(Function) The safety device of the present invention is separate from the locking device for selectively locking and fixing the auger support to either the top boom side or the base boom side in a hole excavation pole erection device with a telescopic boom. Equipped with an auxiliary locking device to lock and secure the auger support to the top boom side when using the auger device.
Even if the main locking device comes off for some reason when the auger device is in use, the auxiliary locking device will ensure that the auger support and auger device are secured to the top boom. No more moving around.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 to 7. The excavation pole erection device with a telescopic boom of this embodiment is composed of a base boom 11, a second boom 12, and a top boom 13. It is equipped with a three-stage telescopic boom 1 and an auger device 2 attached to the telescopic boom 1 to perform hole digging work.

The telescopic boom 1 is attached to a swivel base 9 mounted on a vehicle body frame 8 so as to be able to rise and fall freely.

The auger device 2 is connected via an auger support 21 to the tip of the base boom 11 when the auger device is not in use, and to the top boom 1 when the auger device is in use.
3, respectively. When the auger device 2 is not in use, it is stored horizontally on the side of the base boom 11, and when in use, it is suspended downward from the tip of the top boom 13 for digging. Reference numeral 22 is a hydraulic motor;
23 is an auger screw rotated by the hydraulic motor 22.

This auger device 2 is connected to an auger support 21 via a support shaft 24.

The auger support 21 is connected to the tip of the base boom 11 and the tip of the top boom 13 by a locking device 3 similar to the locking device used in the conventional auger support support structure shown in FIGS. 8 and 9. It is adapted to be selectively locked and fixed to the parts.
That is, the locking device 3 has locking claws 3 at both ends.
With the lever 31 having 2 and 33 facing in the direction of extension and contraction of the telescopic boom, the middle part of the lever 31 is pivotally connected to the auger support 21 with a pin 34, while the base of the lever 31 is attached to the lower surface of the tip of the base boom 11. A locking receiving portion 35 that can be removably engaged with the side locking claw 32
Furthermore, a locking receiving portion 36 is provided at the tip of the top boom 13, with which the front locking pawl 33 of the lever 31 can be engaged in a detachable manner. The lever 31 is pivotally mounted with the distal locking claw 33 side of the lever 31 being biased upward by a spring 37. Further, the lever 31 is supported by a cam 38 provided on the support shaft 24 of the auger device to support the lower surface of the lever 31 on the proximal locking claw 32 side, so that the upper surface of the lever 31 on the distal locking claw 33 side is supported by the spring 37. We are trying to control movement.

When the telescopic boom 1 is fully retracted and the auger device 2 is in the retracted state, the base side locking claw 32 of the lever 31 engages with the base boom side locking receiver 35 (the tip side locking claw 33 is detached from the top boom side locking receiver 36), the auger support 21 is locked to the base boom 11 side, and the auger device 2
In the usage posture state, the base side locking claw 32
is removed from the base boom side locking receptacle 35 and the tip side locking pawl 33 disengages from the top boom side locking receptacle 36.
The auger support 21 is engaged with the top boom 13 side.

Further, a guide member 16 having a pair of left and right outward protrusions 17, 17 for supporting the auger support 21 on the top boom 13 side is fixed to the lower surface of the tip of the top boom 13. On the other hand, the auger support 21 has an inward groove 2 that removably fits into each of the outward protrusions 17, 17 of the guide member 16.
7, 27 is formed, and each outward protrusion 17, 17 on the guide member 16 side is formed.
Each inward protrusion 27, 2 on the auger support 21 side
By fitting 7, the auger support 21
and top boom 13 are slidably connected to each other. In addition, top boom 1
The guide member 16 on the third side is formed relatively short, and when the auger support 21 slides toward the base of the top boom 13 and the slide base 26 and the guide member 16 are disengaged, the auger support 21 It is designed to come off from the top boom 13.

Further, at the lower ends of both sides of the tip of the base boom 11, there are a pair of left and right protrusions 18 (which serve as operating members in the scope of the utility model registration claims) for supporting the auger support 21 on the base boom 11 side. 1
8 is fixed. Each of the protruding rods 18, 18 protrudes from the tip end surface of the base boom 11 by a predetermined length in the direction of extension of the telescopic boom. Note that the tips of each of the protruding rods 18, 18 are tapered to a point. On the other hand, on the slide base 26 of the auger support 21, each protruding rod 18,
18, each of the protruding rods 1
Hollow connecting members 28, 28 are provided in the shape of a horizontally elongated rectangular parallelepiped and have fitting holes 29, 29 into which the connecting members 8, 18 can be inserted and removed, respectively.

When the telescopic boom 1 is fully retracted,
As shown in FIGS. 1, 2, and 5, the slide base 26 of the auger support 21 is
Each of the projecting rods 18, 18 on the base boom 11 side is fitted into the guide member 16 on the third side and slides on the slide base 26.
The auger support 21 is fitted into each of the fitting holes 29, 29, and is supported across the top boom 13 side and the base boom 11 side.
Also, when the telescopic boom 1 is fully retracted, depending on the attitude of the auger device 2, only one of the two locking claws 32 and 33 of the lever 31 of the locking device 3 locks on the base boom side. The auger support 21 engages with the receiving part 35 or the top boom side locking receiving part 36, and when the telescopic boom 1 is extended from the fully contracted state, the auger support 21 engages with the locking claws 32, 3.
3 remains on the side of the support member (protrusion rods 18, 18 or guide member 16) of the boom (base boom or top boom) that is engaged and is supported only by that one support member (18 or 16). become.

Note that in a state where the auger device 2 is stored on the side of the base boom 11, crane work can be performed using the telescopic boom 1 with the auger device 2 stored.

In addition to a locking device 3 for selectively locking and fixing the auger support 21 to the base boom side or the top boom side, this drilling and pole erection device with a telescoping boom also includes a locking device 3 for selectively locking and fixing the auger support 21 to the base boom side or the top boom side.
An auxiliary locking device 5 (which serves as the safety device of the present invention) is provided on the third side for releasably locking and fixing. In addition to the locking device 3, this embodiment also includes an auxiliary locking device 6 for detachably locking and fixing the auger support 21 to the base boom 11 side. The auxiliary locking device 5 for locking and fixing the support 21 to the top boom 13 side is called a top boom fixing auxiliary locking device, and the auxiliary locking device 6 for locking and fixing the auger support 21 to the base boom 11 side is also called a top boom fixing auxiliary locking device. This is called the base boom fixed side auxiliary locking device.

The top boom fixed side auxiliary locking device 5 has an engaging member 51 provided on the slide base 26 portion of the auger support 21, and a receiving member 52 provided on one side of the top boom 13 near the tip. .

The engaging member 51 is made of steel and is formed into a square shape having a horizontal piece 55 and a vertical piece 56. The engaging member 51 is attached by pivoting the lower end of the vertical piece 56 to a bracket 53 formed on the side surface of the slide base 26 with a pin 54, with the horizontal piece 55 facing toward the top boom 13. There is.
Note that the bracket 53 is formed at a lower position than the connecting member 28 provided on the slide base 26. A notch 41 into which the upper side of the engaging member 51 is inserted is formed at a position in the connecting member 28 that corresponds to the engaging member 51 . The interval between the notches 41 is slightly larger than the thickness of the engaging member 51. And the engagement member 51 is
The engagement member 51 is mounted with its upper side fitted into the notch 41, and the engagement member 51 can pivot about the pin 54 in the direction toward and away from the side surface of the top boom 13, and the notch 41 The engaging member 51 can be positioned on the left and right inner surfaces of the boom in the boom expansion and contraction direction. Further, this engaging member 51 is urged by a spring 57 so that its horizontal piece 55 side approaches the side surface of the top boom 13.

On the other hand, the receiving member 52 is attached to the auger support 21
has moved to the closest position to the tip of the top boom 13, the tip 55a of the horizontal piece 55 of the engaging member 51 moves toward the top boom 13 at the corresponding position.
Fixed to the side. A recess 59 is formed in the surface of the receiving member 52 facing the engaging member 51 to allow the distal end portion 55a of the horizontal piece 55 of the engaging member to be engaged in a detachable manner.

Furthermore, the engagement member 51 automatically moves in the inward and outward directions (close to the top boom,
It is designed so that it can be pivoted in the direction of separation. That is, when the protruding rod 18 is inserted into the insertion hole 29, the inner surface of the vertical piece 56 of the engaging member 51 is pushed by the outer surface of the protruding rod 18, as shown in FIGS. 5 and 6. The side surface is pressed, and the engaging member 51 is pushed outward against the spring 57, and the protruding rod 18
When the engagement member 51 is pulled out from the insertion hole 29 (FIG. 4), the engagement member 51 is urged by the spring 57 and pivots inward.

This auxiliary locking device 5 includes an engaging member 51
is pushed outward by the protruding rod 18 , the tip 55 a of the horizontal piece 55 of the engagement member is disengaged from the recess 59 of the receiving member 52 , and the auger support 21 slides relative to the top boom 13 . When the protruding rod 18 is pulled out from the insertion hole 29 and the engaging member 51 is pivoted inward, the tip 55a of the horizontal piece 55 of the engaging member is inside the recess 59 of the receiving member 52. It is now possible to fit into the And one sideward end portion 55a of the engaging member 51
When the auger support 21 is fitted into the recess 59 of the receiving member 52, the auger support 21 is fixed to the top boom 13 in a non-slidable manner. Therefore, the horizontal one end portion 55a of the engaging member 51 is in the receiving member recess 5.
9, the auger support 2
1 is this engagement member 51 for the top boom 13.
The locking device 3 is doubly locked and fixed by the front locking claw 33 of the locking device 3, and if for some reason (even if the spring 37 on the locking device 3 side breaks) the locking device 3 Even if the auger support 21 is disengaged from the top boom 13, the auger support 21 is reliably kept fixed to the top boom 13 by the top boom fixed side auxiliary locking device 5, improving safety.

The base boom fixed side auxiliary locking device 6 has a horizontal piece 65 and a vertical piece 66 provided on the slide base 26 portion of the auger support 21, similar to the engaging member 51 of the top boom fixed side locking device 5. , and a notch-shaped fitting receiving portion 62 for fitting the engaging member 61 provided on the protruding rod 18 .

The engaging member 61 is attached to a bracket 63 formed on the side surface of the slide base 26 by means of a pin 54, with the lower end of the vertical piece 66 being pivotally supported. Further, the engaging member 61 is biased toward the side surface of the telescopic boom 1 by a spring 67. A notch 42 is formed in the connecting member 28 at a position corresponding to the engaging member 61, and the engaging member 61 pivots within the notch 42.

A side surface of the tip end of the top boom 13 is provided with a side surface of the engaging member 61 that abuts one side end surface of the engaging member 61 facing sideways.
A protruding plate 68 is fixed thereto to maintain the opening in an outwardly opened position. The ends of the projecting plate 68 in the telescopic boom retraction direction side (in this embodiment, both ends) are sloped surfaces 68a, and when the base boom fixed side auxiliary locking device 6 is locked or released. During operation, one sideward end surface of the engaging member 61 can smoothly abut against or separate from the protruding plate 68.

The notch-shaped fitting receiving portion 62 formed on the protruding rod 18 is
When the telescopic boom 1 is fully retracted, the engaging member 6
1 (facing the inside of the notch 42). When the distal end surface of the horizontal piece 65 of the engaging member 61 is in abutment with the distal end surface of the protruding plate 68 on the top boom 13 side, the engaging member 61 is pushed outward as shown by the solid line in FIG. The protruding rod 18 is then separated from the fitting receiving portion 62 (the protruding rod 18 can be inserted and removed freely within the fitting hole 29), and the horizontal one end surface of the engaging member 61 is released from the protruding plate 68. Then, due to the biasing force of the spring 67, the inner surface of the vertical piece 66 of the engaging member 61 is fitted into the fitting receiving portion 62 as shown by a chain line 61' (FIG. 7). In this state where the engaging member 61 is fitted into the fitting receiving portion 62 of the protruding rod 18,
The slide base 26 is locked and fixed to the protruding rod 18, and the auger support 21 is connected to the base boom 11.
The base side locking claw 32 of the locking device 3 locks and fixes it in a double manner. Therefore, even if the locking of the base boom 11 side by the locking device 3 is released for some reason, the auger support 2 can be locked by the base boom fixed side auxiliary locking device 6.
1 can be reliably locked and fixed to the base boom 11 side, and safety is improved.

(Effect of the invention) The safety device of the drilling and pole erection device with a telescopic boom of the present invention includes a telescopic boom 1 having a top boom 13 that is extendable and retractable with respect to a base boom 11, and a telescopic boom 1 that is connected to the telescopic boom 1 via an auger support 21. The auger support 21 is selectively locked by a locking device 3 to the top boom 13 side when the auger device is in use, and to the base boom 11 side when the auger device is not in use. In a hole digging and pole erection device with a telescopic boom that can be fixed, the auger support 21 is located between the auger support 21 and the top boom 13, in addition to the locking device 3, on the top boom tip side when the auger device is in use. The present invention is characterized in that an auxiliary locking device 5 is provided for detachably locking and fixing the auger support 21 to the top boom 13 side when the auger support 21 is in a predetermined position.

Therefore, according to the present invention, when the auger device 2 is used, the auger support 21 is connected to the top boom 13 so that the auger support 1 is connected to the base boom 11.
The main locking device 3 and another auxiliary locking device 5 are used to selectively lock and lock the auger support 21 to the top boom 13 side and the top boom 13 side. The condition becomes even more certain, safety improves, and the auger device 2
When using the auger support 21, even if the main locking device 3 becomes unlatched for some reason, the auger support 21
is reliably held on the top boom 13 side by the auxiliary locking device 5, and the auger support 21 (and auger device 2) is secured to the top boom 1 side.
There is an effect that there is no need to move compared to 3.

[Brief explanation of the drawing]

Fig. 1 is a side view of a drilling pole erection device with a telescopic boom equipped with a safety device according to an embodiment of the present invention;
The figure is a partial side view of the digging and pole-erecting device with the telescopic boom shown in Fig. 1, seen from the back side. 5 and 5 are respectively perspective views showing the safety device shown in FIG. 2 in the operating state, FIGS. 6 and 7 are cross-sectional views of FIG. 2, and FIG. 8 is a conventional telescopic boom. FIG. 9 is a partial side view of the hole-drilling and pillar-erecting device, and is a cross-sectional view taken from FIG. 8. 1...Telescopic boom, 2...Auger device, 3...
Locking device, 5... Auxiliary locking device, 11... Base boom, 13... Top boom, 18... Operating member, 21... Auger support, 51... Engaging member, 52... Receiving member.

Claims (1)

[Scope of utility model registration request] A telescoping boom 1 having a top boom 13 that is extendable and retractable with respect to a base boom 11, and an auger device 2 attached to the telescoping boom 1 via an auger support 21. In the drilling pole erection device with a telescoping boom, which can be selectively locked and fixed to the top boom 13 side when the auger device is in use and to the base boom 11 side when the auger device is not in use, the auger support 21 and An engaging member 51 provided on the auger support 21 side and a receiving member 52 provided on the top boom 13 side with which the engaging member 51 engages in a detachable manner between the top boom 13, When the auger support 21 moves forward together with the top boom 13 in a state where the auger support 21 is located at a predetermined position on the top boom tip side when the auger device is used, the engagement member 51 engages the receiving member 52. When the boom is fully retracted, the engagement member 51 is disengaged from the receiving member 52 by the disengagement operation member 18 provided on the base boom 11 side. A safety device for a digging and pole erection device with a telescopic boom, characterized in that it is provided with an auxiliary locking device 5 as described above.