JPH033668Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hole-drilling pole-erecting vehicle having an auger attached to a boom.

(General structure of a digging pole erecting vehicle) A digging pole erecting vehicle is mainly used for erection work of columnar bodies such as utility poles, and as shown in FIG. It has a crane device X mounted on the top via a swivel table 13 so as to be rotatable and movable up and down, and an auger 4 stored on the side of a telescoping boom 3 of the crane device X.

The auger 4 is for digging a deep hole in the ground for erecting a pillar, and has a screw 6 formed with a spiral blade 7 on the outer periphery of a shaft 8 of an appropriate length, a hydraulic motor, and a speed reducer. A motor unit 5 for applying rotational force to the motor unit 6 is connected coaxially and in a manner capable of transmitting rotational force. This auger 4 is connected to a motor unit 5 as shown in FIG.
By connecting the upper end 5a and the top end 3a of the boom 3, that is, the auger support bracket 14 attached to the top boom 3B, via the auger support device 15, it is possible to suspend the top end 3a of the boom 3. It is connected and supported.

During the work, that is, during hole digging and pole erection work, the auger 4 is suspended in a hanging state via an auger support device 15 from the tip 3a of the boom 3, which is in an upright state, as shown by the chain line in FIG. Supported. On the other hand, when not working, the auger 4
is stored and supported on the side of the boom 3, as shown by solid lines in FIG.

The auger 4 is stored and supported on the side of the boom by the auger support device 15, an auger storage bracket 10 (described later) attached to the side of the base boom 3A of the boom 3, and a boom protruding from the auger storage bracket 10. 3 of 9 (a wire rope is used in this illustrated general example) stretched between the side cable end stop 17 and the auger side cable end stop 18 provided on the shaft 8 portion of the screw 6 of the auger 4. It is carried out by a person. That is, the auger storage bracket 10 is constructed of a plate member having a fitting groove 20 that opens toward the lower side of the boom, as shown in an enlarged view in FIG. Therefore, with the auger 4 hanging from the boom tip 3a as shown by the chain line in FIG. , actuate the motor unit 5 of the auger 4 to drive the screw 6.
When the cable 9 is rotated, the cable 9 is gradually wound around the shaft 8 of the screw 6, so that the auger 4 is pulled up while rotating upward about the auger support device 15, and finally the screw of the auger 4 is pulled up. 6
The shaft 8 is in the fitting groove 20 of the auger storage bracket 10.
It gradually fits and enters the inside from the lower open end side,
It stops near the bottom of the fitting groove 20, and its swinging in the left and right direction is restricted by the fitting groove 20. Therefore, the auger 4 is stored, supported, and fixed on the side of the boom 3 in a state where its position is restricted in three axial directions by the auger support device 15, the auger storage bracket 10, and the cable 9. Become.

The above is the general structure and operation of a hole-drilling pole-erecting vehicle equipped with an auger.

(Prior Art) As a conventional example of a hole-drilling pole-erecting vehicle having such an auger storage structure, there is known, for example, the one shown in Japanese Utility Model Application Laid-Open No. 49-98003.

By the way, when the auger is stored on the side of the boom by the auger support device 15, cable 9, and auger storage bracket 10 as described above, the downward movement of the auger can only be regulated by the tension of the cable 9. Therefore, if some kind of mechanical auger support mechanism is not provided in the auger storage bracket 10, the screw 6 of the auger 4 will gradually rotate due to oil leakage in the motor unit 5, and the auger 4 will move in the falling direction, causing the auger to fall. 4 will be impaired.

For this reason, in the conventional example described above, a mechanical locking mechanism is provided in the auger storage bracket. That is, this locking mechanism
As shown in the figure, a fitting groove 62 that opens downward is formed in the auger storage bracket 61 attached to the side of the base boom 60, and a substantially triangular lock lever is provided at the side position of the fitting groove 62. 6
5 is rotatably attached via a fulcrum pin 66. This lock lever 65
has a pair of left and right engagement protrusions on one side, that is, a first engagement protrusion 65a located on the lower side and a second engagement protrusion 65b located on the upper side, and the pair of engagement protrusions 65a, 65b. An engaging surface 65c having an arcuate surface capable of abutting and engaging with the shaft 64 of the lock lever 65 is provided therebetween. In addition, this lock lever 65 is always operated by a spring 67.
As shown by the chain line (65') in FIG. 6, the pair of engaging protrusions 65a and 65b are positioned and biased so that they both protrude into the fitting groove 62 (this position is referred to as the initial setting position). .

In this lock mechanism, when the auger 63 is stored, the auger 6 is moved upward from below the auger storage bracket 61 toward the fitting groove 62.
The shaft 64 of No. 3 engages with the first engagement protrusion 65a' of the lock lever 65' which is positioned at the initial setting position, and enters into the fitting groove 62 while flipping the lock lever 65 upward. Then, the shaft 64 is the first
When the lock lever 6 gets over the engagement 65a,
The engagement surface 65c of the shaft 64 abuts and engages with the shaft 64.
4 is supported between the engagement of the lock lever 65 and the outer surface 62a of the fitting groove 62 (retracted state).

However, in this conventional lock mechanism,
Since the locked position of the lock lever 65 (the position shown by the solid line in FIG. 6) is determined in relation to the relative sliding displacement between the lock lever 65 and the shaft 64 (in other words, the position of the shaft 64 and (This is because the shaft 64 is not configured to later engage with the lock lever 65, which has been previously positioned at the locked position, regardless of the lock lever 65). At the top, the second engagement protrusion 65 of the lock lever 65'
b' and the shaft 64' are engaged with each other, and the shaft 64' is supported in an unstable state between the second engaging protrusion 65b' of the lock lever 65' and the outer surface 62a of the fitting groove 62. It is possible for this to happen. When the auger 63 is stored in this state, if the shaft 64 is disengaged upward from the engagement protrusion 65b' due to vibrations when the vehicle is running, the lock lever 65 is rotated by the spring 67, and the shaft 64 is moved again. When the shaft 64 comes into contact with the lock lever 65, the locked state of the shaft 64 by the lock lever 65 is released. For this reason, if the oil leak described above occurs, the shaft 64 will gradually slide downward, causing concerns about the reliability of the locking action.

(Purpose of the invention) The present invention is an attempt to solve the problems pointed out in the above-mentioned section of the prior art. The purpose is to provide

(Means for Achieving the Object) The present invention, as a means for achieving the above object, includes a boom that is attached to a vehicle so as to be able to raise and lower, and a boom that is detachably suspended from the tip of the boom. an auger attached to the auger;
It is constructed by connecting a screw with spiral blades formed on the outer periphery of the shaft and a motor unit for rotationally driving the screw, and in the working state, the auger is held in a hanging state from the tip of the boom. When not in operation, the auger is stored and held on the side of the boom with the shaft of the screw fitted into the fitting groove of the auger storage bracket attached to the appropriate position of the boom. The effective length of the cable is determined by winding or unwinding the cable stretched between the appropriate position on the boom side and the appropriate position on the screw shaft by rotating the shaft. In the hole-drilling pole-erecting vehicle which is constructed by adjusting the auger storage bracket, the fitting groove of the auger storage bracket is formed in a substantially vertical direction, and one end thereof is opened at the lower end surface of the auger storage bracket; A lock lever is located near the fitting groove, and a swing lever is located near the deep part of the fitting groove, and these levers are connected to each other so as to be pivotable in the vertical direction and to be interlocked with each other via a link bar. Further, the lock lever is formed with a first protrusion and a second protrusion separated from each other as appropriate, and in the first lever position, the first protrusion is in the fitting groove. If the shaft is located above the first protrusion, the first protrusion and one side of the fitting groove cooperate to cause the shaft to protrude into the fitting groove. While it acts to support the shaft from below while it is fitted into the fitting groove, it also allows the shaft to move upward when the shaft is located below the first protrusion. and the second
In the lever position, the second protrusion protrudes into the fitting groove and can be engaged with the shaft moving downward in the fitting groove, and the shaft is connected to the second protrusion. When the lock lever is engaged with the shaft, the shaft is configured to forcibly return the lock lever from the second lever position to the first lever position, and the first lever is rotated by an appropriate biasing means. The swing lever is biased so that the first lever position is held when the lever is in the first position, and the second lever position is held when the swing lever is in the second lever position. When the lock lever is moved, the lock lever is appropriately engaged with the shaft to forcibly position the lock lever from the first lever position to the second lever position.

(Function) In the present invention, by the above-mentioned means, (1) When storing the auger, the shaft of the screw located below the fitting groove of the auger storage bracket is pulled up, and the shaft of the screw is pulled up near the opening end of the fitting groove and When the lock lever enters the fitting groove while mutually engaging with the first protrusion set in the lever position, the shaft crosses the first protrusion from the lower side to the upper side. At this point, the lock lever is set to be able to support the shaft, so if you stop moving the shaft up at this point and then move the shaft down in the opposite direction, the shaft will be securely attached to the first protrusion. The lock lever is stably supported by the first protrusion of the lock lever and the side surface of the fitting groove, and its movement in the falling direction is reliably regulated.

(2) When the auger is extended from the storage position, the shaft supported by both the first protrusion of the lock lever positioned at the first lever position and the side surface of the fitting groove is Once lifted upward to engage the swing lever at the deep end of the fitting groove, the displacement of the swing lever is used to position the lock lever from the first lever position to the second lever position. When the shaft is allowed to pass, and the shaft is moved downward in this state, the shaft separates from the fitting groove downwardly and engages with the second protrusion of the lock lever in the middle. Then, the lock lever is returned from the second lever position to the first lever position.

(Example) Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. It has the same structure as the hole-drilling pole-erecting vehicle (see Figures 4 and 5) explained in the section ``Structural Structure'', except that a locking mechanism for fixing and holding the auger is attached to the auger storage bracket. However, since there is only a difference, in the following explanation, only the auger storage bracket portion including this locking mechanism will be explained, and explanations of the structure and operation of other portions will be omitted.

(Structure) FIGS. 1 and 2 show an auger storage bracket portion of a hole-drilling and pole-erecting vehicle according to an embodiment of the present invention. This auger storage bracket 10 is formed to protrude from the side of the boom 3, and a fitting groove 20 for fitting and supporting the shaft 8 of the screw 6 is provided near the outer end of the auger storage bracket 10. A cutout groove is formed upward from the lower end surface 10a. The opening end 20a located at the lower end of this fitting groove 20 is formed to widen downward, and the deep groove part 20b located at the uppermost end of the fitting groove 20 is formed with an arcuate surface. has been done.

The shaft 8 of the screw 6 is fitted into the fitting groove 20 as shown by the solid line in FIG. In FIG. 1, reference numeral 9 connects one end of the rope to the boom-side cable end stop 17 of the auger storage bracket 10, and connects one end thereof to the boom-side cable end stop 17 of the auger storage bracket 10 (not shown).
The auger 4 wraps the cable 9 around the shaft 8 of the screw 6 or unwinds it from the shaft 8 by the self-rotation of the screw 6. 9
By increasing or decreasing the effective length of the auger, it can be pivoted vertically around the auger support device (see numeral 15 in Fig. 4) provided at its base end, and can be selected from two positions: a storage position and a working position. It is designed to be positioned uniformly.

At a position near the fitting groove 20 of the auger storage bracket 10, there is a lock mechanism (to be described later) for supporting the shaft 8 of the screw 6 fitted and stored in the fitting groove 20 and regulating its movement in the falling direction. Y is provided.

The lock mechanism Y includes a lock lever 21 provided near the open end 20a of the fitting groove 20, and a swing lever 22 provided near the deep groove 20b of the fitting groove 20. .

The lock lever 21 has its fixed end 21a connected to the auger storage bracket 1 by means of a lock lever shaft 26.
It is composed of a substantially triangular member connected to the bracket 35 on the 0 side so as to be pivotable in the vertical direction, and the movable end 21b has two protrusions spaced apart appropriately in the direction of rotation. A first protrusion 41 having a substantially square tip shape and a second protrusion 42 having a substantially rectangular tip shape are formed. Incidentally, of the distal end surface of the first protrusion 41 of the lock lever 21, a portion located outward in the rotational direction from the protrusion end 43 is an arcuate surface having approximately the same curvature as the outer circumferential surface of the shaft 8. This is a shaft support surface 44 .

Furthermore, the other end of a lock lever spring 28 is hooked to the lock lever 21, and one end of the lock lever spring 28 is hooked to a spring hook portion 36 formed at a position appropriately spaced away from the lock lever shaft 26 toward the side opposite to the fitting groove 20. The lock lever 21 is biased in the rotational direction by the spring force of the lock lever spring 28, and is positioned at a predetermined lever position (this lock lever spring 28 has been registered as a utility model). (corresponds to the biasing means in the claims). That is, this lock lever 21 is centered around the lock lever shaft 26 in a first lever position, that is, as shown in solid lines in FIG. 20, the second protrusion 42 is retracted out of the fitting groove 20, and its further rotation in the direction of arrow A is restricted by the lock lever stopper 30; When the lever is rotated from the first lever position in the direction of arrow B to the second lever position, that is, as shown by the solid line in FIG. 20 and the second protrusion 42 protrudes into the fitting groove 20 (actually, the lever position is slightly rotated further toward the arrow B side than the lever position shown in FIG. 2). The lever can be rotated between two lever positions. And in that case, the first
In the lever position, the line of action of the lock lever spring 28 is located below the lock lever shaft 26, and the lock lever spring 28 is located below the lock lever shaft 26.
The lock lever 21 is biased toward the first lever position by the spring force of the lock lever spring 28.
The lock lever spring 2 is positioned so that its line of action is located above the lock lever shaft 26 and the spring force of the lock lever spring 28 biases the lock lever 21 toward the second lever position.
8 mounting positions are set.

The swing lever 22 has a swing lever shaft 27
A first lever member 23 is pivotably supported to be vertically rotatable by a lever, and a second lever is relatively rotatably connected to the tip of the first lever member 23 via a connecting pin 34. It is a bendable lever consisting of a member 24. Among the lever members 23 and 24, the first lever member 23 is connected from the base end 24a to the lower surface side of the base end 24a of the second lever member 24.
An arm 37 is attached that extends toward the lower surface of the swing lever, and a swing lever spring 29 is attached between the tip of the arm 37 and the base end 23a of the first lever member 23. Therefore, in the normal state, the swing lever 22 is held in a straight bar shape by the spring force of the swing lever spring 29, as shown in FIGS. 1 and 2, respectively. On the other hand, an external force is applied from below to the second lever member 24 portion of the swing lever 22, causing the swing lever 22 to rotate upward (in the direction of arrow D), and the first lever member 23
If an external force is further applied after the upper surface collides with the swing lever stopper 31 provided on the side of the auger storage bracket 10, the second lever member 24 bends upward about the connecting pin 34, and This acts to prevent excessive force from being applied to the first lever member 23 side.

This swing lever 22 is arranged with the second lever member 24 portion protruding into the fitting groove 20, and when the shaft 8 engages with the second lever member 24, the swing lever 22
is forcibly lifted upward by the operating force of the shaft 8. The swing lever 22 is operatively connected to the lock lever 21 via a link bar 25, and the lock lever 21 moves from the first lever position to the second lever position as the swing lever 22 moves upward. The swing lever 22
is from the second lever position of the lock lever 21 to the first
As the lever is rotated to the lever position, the lever is rotated downward from the upward position.

In addition, in FIGS. 1 and 2, the reference numeral 11 indicates the third
As shown in the figure, a shut-off valve 11 is disposed in a hydraulic circuit Q for driving the motor unit 5, and the shut-off valve 11 is connected to its actuator 1.
2 is attached to the fitting groove 20 in such a manner that it protrudes downward from the deep groove part 20b by an appropriate dimension.
The hydraulic circuit Q is composed of a hydraulic pump 53, a hydraulic motor 54, a manual switching valve 55, and the above-mentioned shut-off valve 11, and when the shut-off valve 11 is not in operation, the switching operation of the switching valve 55 is performed. Therefore, the hydraulic motor 54 can be rotated in an appropriate direction to perform hole digging work or to store and extend the auger 4. However, when the shut-off valve 11 is operated during the auger store and extend work, the hydraulic motor 54 cannot be rotated. It is configured so that it can only be rotated in one direction (namely, the direction in which the auger extends).

(Operation and Effect thereof) Next, the operation and effect of the lock mechanism Y will be explained with respect to when the auger 4 is retracted and when the auger 4 is extended.

(When the auger is stored) When the auger 4 is extended, that is, the shaft 8 of the screw 6 is not fitted into the fitting groove 20 of the auger storage bracket 10, for example, as shown by the chain line (reference numeral 8A) in FIG. When the lock lever 21 and the swing lever 22 of the lock mechanism Y are located below the opening end 20a of the fitting groove 20, respectively, the lock lever 21 and the swing lever 22 of the lock mechanism Y are at the positions shown by solid lines in FIG. (the swing lever 22 is positioned at the lowered position).

From this state, the motor unit 5 is operated to rotate the shaft 8 of the screw 6, and the shaft 8 is pulled up into the fitting groove 20 of the auger storage bracket 10 by the cable 9.

When the shaft 8 is pulled upward from this position,
First, the lock lever 21 engages with the first protrusion 41 of the lock lever 21 after entering the opening end 20a of the fitting groove 20, but since the lock lever 21 is rotatable in the direction of arrow B, the shaft 8 The first protrusion 41 is not restricted in its upward movement and is further pulled up while pushing the first protrusion 41 upward. With this upward movement of the shaft 8, the lock lever 21 is moved up to a position where the protruding end 43 of the first protrusion 41 engages with the shaft 8B shown in chain lines in FIG. The lock lever 21 is then rotated in the direction of arrow B, but when the shaft 8 is lifted above the position 8A, the engagement between the two is released and the lock lever 21 is rotated again by the spring force of the lock lever spring 28. The lever is positioned at lever position 1 (the position shown by the solid line). Therefore, in this state, the lock lever 21 is in a state where it can support the shaft 8,
The shaft support surface 44 is positioned and fixed in a direction suitable for the support function.

At this time, the operator can confirm that the lock lever 21 has returned to the first lever position by visually confirming this state or by hearing the collision sound between the second protrusion 42 of the lock lever 21 and the lock lever stopper 30. Check. As a means for the operator to visually confirm that the lock lever 21 has returned to the first lever position, for example, a protrusion 70 is provided at one end of the lock lever 21 as shown by the chain line in FIG. , engages the movable rod 71 whose upper end 71a faces the hole 72 formed in the upper surface 10b of the auger storage bracket 10, and when the lock lever 21 is set at its first lever position, the movable rod 71
is constructed so that it protrudes upward by a predetermined amount from the upper surface 10b, and the operator visually recognizes the protruding state of the upper end 71a of the movable rod 71, or directly engages the limit switch with the protrusion 70 to lock the lock lever. When the lever 21 is set to the first lever position, a lamp provided near the worker is lit, and the worker visually recognizes this as a means for confirming the position.

When you check the lever position of lock lever 21,
The operator then stops lifting the auger 4 and then lowers the auger 4 a little. Then, the shaft 8 abuts and engages with the shaft support surface 44 of the lock lever 21, as shown by the solid line in FIG. When the auger 4 is further lowered a little, the shaft 8 moves slightly outward around the shaft support surface 44 of the lock lever 21, and its outer circumferential surface comes into contact with the outer side surface 20c of the fitting groove 20, and the shaft 8 is the lock lever 21 and the auger storage bracket 1, regardless of the cable 9.
0 will definitely be supported by both.

In this case, as described above, since the shaft 8 subsequently comes into abutting engagement with the shaft support surface 44 of the lock lever 21 that has been accurately positioned in advance at the first lever position, the shaft 8 and the shaft support surface 44 The relative relationship in the state of contact with the shaft 8 is always maintained in a proper state, and the shaft 8
It becomes possible to support the shaft 8 more stably and reliably, and the movement of the shaft 8 in the falling direction is reliably prevented. The retracted state of the auger 4 is indirectly confirmed by the above-mentioned position confirming means of the lock lever 21, and the position confirming means can also function as the auger retracted state confirming means.

(When the auger is extended) When the auger 4 is extended from the auger retracted state shown by the solid line in FIG. 1, the auger 4 is pulled upward from this retracted state. This lifting operation of the auger 4 is carried out by moving upward together with the swing lever 22, on which the shaft 8 is extended upward, as shown by the solid line in FIG. The upper surface engages with the actuator 12 of the shut-off valve 11, and the operation of the actuator 12 continues until the rotation of the motor unit 5 is forcibly stopped. When the shaft 8 is in a stopped state, the lock lever 21 is rotated in the direction of arrow B via the link bar 25 as the swing lever 22 is displaced, and is positioned at the second lever position ( (Position shown in solid line in Figure 2).

Therefore, when the auger 4 is lowered in this state, the shaft 8 is not restricted by the lock lever 21 and is removed downward from the fitting groove 20. Furthermore, at this time, the shaft 8 engages with the second protrusion 42 of the lock lever 21 at the position indicated by the chain line 8C in FIG.
The lock lever 21 is forcibly rotated in the direction of arrow A against the spring force to return to the first lever position, thereby preparing the lock lever 21 for the next auger storage operation.

(Effects of the invention) The hole-drilling pole-erecting vehicle of the present invention has a boom that is attached to the vehicle so as to be movable up and down, and an auger that is attached to the tip of the boom in a removably suspended state. The auger is constructed by connecting a screw formed with spiral blades on the outer periphery of a shaft and a motor unit for rotationally driving the screw, and when in operation, the auger is suspended from the tip of the boom. and when not in operation, the auger is stored and held on the side of the boom with the shaft of the screw fitted into the fitting groove of an auger storage bracket attached to the appropriate position of the boom, The auger storage or extension work is carried out by winding or unwinding the cable stretched between the appropriate location on the boom side and the appropriate location on the shaft of the screw by rotating the shaft. In a pole-erecting vehicle for digging holes by adjusting the length, the fitting groove of the auger storage bracket is formed in a substantially vertical direction, and one end thereof is opened at the lower end surface of the auger storage bracket. , a lock lever is connected to a position near the fitting groove, and a swing lever is connected to a position near the deep part of the fitting groove so as to be pivotable in the vertical direction and to be interlocked with each other via a link bar. Further, the lock lever is formed with a first protrusion and a second protrusion that are appropriately spaced apart from each other, and in the first lever position, the first protrusion is in the fitting groove. and when the shaft is located above the first protrusion, the first protrusion and one side of the fitting groove cooperate to cause the shaft to fit into the fitting groove. While it acts to support the shaft from below while it is fitted into the matching groove, it acts to allow the shaft to move upward when the shaft is located below the first protrusion. In addition, in the second lever position, the second protrusion protrudes into the fitting groove and is engageable with the shaft moving downward in the fitting groove, and the shaft is When engaged with the second protrusion, the shaft is configured to forcibly return the lock lever from the second lever position to the first lever position, and an appropriate biasing means is provided. When the lever is in the first lever position, the lever is biased to hold the first lever position, and when the lever is in the second lever position, the swing lever is biased so as to hold the second lever position. It is characterized in that it is configured so that when it moves upward in the fitting groove, it engages with the shaft appropriately and forcibly positions the lock lever from its first lever position to its second lever position. be.

Therefore, according to the hole-drilling pole-erecting vehicle of the present invention, when the auger is in the retracted state, the contact position between the first protrusion of the lock lever and the shaft of the screw is always reliably positioned at an appropriate position. When the shaft is supported by the first protrusion of the lock lever and the side surface of the fitting groove of the auger storage bracket, the support stability is good, and conventional examples (for example,
98003), the unstable support prevents the auger from moving in the falling direction due to movement while the vehicle is running, and the auger can be stored and held on the boom side more reliably. Practical effects can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a front view of the main part of the auger storage bracket of the excavation pole construction vehicle according to the embodiment of the present invention, Fig. 2 is a state change diagram of Fig. 1, and Fig. 3 is the excavation construction of Fig. 1. Hydraulic circuit diagram for driving the auger of the pole car, Fig. 4 is a side view of a general pit-drilling pole-erecting car, Fig. 5 is a vertical sectional view of Fig. 4, and Fig. 6 is a conventional pit-drilling pole-erecting car. FIG. 3 is a front view of the main part of the auger storage bracket of FIG. 1...Vehicle, 3...Boom, 4...Auger, 5
...Motor unit, 6...Screw, 7...
Spiral blade, 8... shaft, 9... cable, 10...
Auger storage bracket, 20... Fitting groove, 21...
... Lock lever, 22 ... Swing lever, 25
...Link bar, 28, 29...Spring, 4
1...First protrusion, 42...Second protrusion, 4
4...Axle support surface.

Claims (1)

[Scope of utility model registration request] It has a boom 3 attached to the vehicle 1 so as to be movable up and down, and an auger 4 detachably attached to the tip of the boom 3 in a suspended state. 7 and a motor unit 5 for rotationally driving the screw 6, and in the working state, the auger 4 is held hanging from the tip 3a of the boom 3. When the auger 4 is not in operation, the auger storage bracket 1 is attached to the boom 3 at a suitable position.
The screw 6 is stored and held on the side of the boom 3 with the shaft 8 of the screw 6 fitted into the fitting groove 20 of the screw 6, and the auger 4 can be stored or extended at an appropriate position on the boom 3 side. This is done by adjusting the effective length of the cable 9 stretched between the screw 6 and the appropriate position of the shaft 8 by winding or unwinding the cable 9 toward the shaft 8 by rotating the shaft 8. The fitting groove 20 of the auger storage bracket 10 is formed in a substantially vertical direction, and one end thereof is opened at the lower end surface of the auger storage bracket 10. Groove 2
A lock lever 21 is located at a position near 0, and a swing lever 22 is located near a groove deep portion 20b of the fitting groove 20, which can pivot freely in the vertical direction and interlock with each other via a link lever 25. Further, the lock lever 21 has a first protrusion 41 and a second protrusion 42 formed with an appropriate distance from each other, and in the first lever position, the first protrusion 41 and the second protrusion 42 are connected to each other. The protrusion is in the fitting groove 2 above.
When the shaft 8 is located above the first protrusion 41, the first protrusion 41 and one side surface 20c of the fitting groove 20 cooperate with each other. This acts to support the shaft 8 from below while it is fitted into the fitting groove 20, while when the shaft 8 is located below the first protrusion 41, the shaft 8 is In the second lever position, the second protrusion 42 protrudes into the fitting groove 20 and moves downward within the fitting groove 20. When the shaft 8 is engaged with the moving shaft 8 and the shaft 8 is engaged with the second protrusion 42, the shaft 8 moves the lock lever 21 from the second lever position to the first lever position. It is configured so that it can be forcibly rotated back to the side, and is maintained at the first lever position when it is in the first lever position by an appropriate biasing means 28, and is held in the first lever position when it is in the second lever position. The swing lever 22 is biased to maintain the second lever position, and when the shaft 8 moves upward in the fitting groove 20, the swing lever 22
2. A hole-drilling pole-erecting vehicle characterized by being configured such that the lock lever 21 can be forcibly positioned from the first lever position to the second lever position by appropriately engaging with the lock lever 21.