JPH07155069A - Pile driver - Google Patents

Abstract

PURPOSE:To provide a pile driver enabling many piles to be driven efficiently with little idle time. CONSTITUTION:This pile driver is designed to drive into the ground each time of a specified distance of travel one pile K delivered from a supporting section 19 to arrange and support many piles K by a driving tool 41 driven and subjected to vertically moving operation over the range between the waiting position on the upper side and the driving position on the lower side. In this case, the driving action part 41a of said tool 41 is equipped with a guide plate 66 to support a delivered pile K by receiving it at the waiting position and this guide plate 66 is supported elastically retreatably in the direction opposite to the machine body advancing direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving tool for vertically moving one of the piles fed from a supporting portion for supporting a large number of piles side by side between an upper standby position and a lower driving position. The present invention relates to a pile driving device configured to be driven into the ground every time the vehicle travels for a predetermined distance, and more particularly to a pile driving device that causes the machine body to travel in a direction opposite to the direction in which the piles are delivered.

[0002]

2. Description of the Related Art In the above-mentioned pile driving apparatus, conventionally, as shown in Japanese Patent Application No. 5-118078 filed by the present applicant, the pile driving apparatus is mounted on a walking type traveling body and is sent out from the supporting portion. There is a structure in which the piles that have been sent out are received and supported at the driving standby position by a temporary support portion that is integrally formed with the left and right driving portions of the driving tool.

[0003]

In the above-mentioned conventional structure, the piles fed out one by one are reliably driven into the standby position, that is,
The driving tool can be reliably received and supported at a position adjacent to the lower side of the driving tool. However, in the above-mentioned conventional structure, since the receiving temporary support portion is formed integrally with the driving tool, when the driving tool is lowered and the driving operation is completed, the temporary support is used. There is a risk that the part will push down the driving pile, so it must be done after the driving tool has risen to the specified position.
Since the aircraft cannot be driven and the number of piles to be driven is large, there is a drawback that the work efficiency as a whole of pile driving is low. The present invention aims to eliminate the above-mentioned problems.

[0004]

According to a characteristic construction of the present invention, in the pile driving device described at the beginning, a guide plate for receiving and supporting the fed pile at a driving standby position is provided in a driving action portion of the driving tool. With the provision
This guide plate is elastically retractable in the direction opposite to the direction of travel of the machine.

[0005]

The single pile sent out from the supporting portion is received and supported by the guide plate, and is reliably held at the lower side adjacent position (driving standby position) of the driving portion of the driving tool. Since the guide plate is provided in the driving section and moves up and down integrally with the driving tool, it is possible to prevent the pile from coming off the driving tool in the entire lowering operation stroke for driving, and reliable driving can be performed.
Then, when the driving tool descends to the downward driving position and the pile driving is completed, the aircraft is immediately moved and moved toward the next driving position, and the guide plate contacts the driving pile. Even if there is, since the guide plate is elastically retracted and displaced in the direction opposite to the machine traveling direction, the driving pile will not be pushed down.

[0006]

As described above, when the driving tool descends to the lower driving position, it is possible to start the lifting operation of the driving tool and to simultaneously move the machine body without waiting for the driving tool to rise to the predetermined position. The waiting time was reduced and the work efficiency was improved. Particularly, in the pile driving work in which a large number of piles are sequentially driven, the working time of the entire work is significantly reduced.

[0007]

Embodiments will be described below with reference to the drawings. Figure 1
1 shows a work vehicle in which the stake driving device 2 is mounted on the walk-behind traveling vehicle body 1. The traveling machine body 1 includes a pair of left and right traveling wheels 3,
The engine frame 5 is mounted in a cantilever manner on the mission case 4 which also serves as the frame and which also serves as the frame 3, and the engine 6
The power of the engine 6 is transmitted to the traveling wheels 3 and 3 via the belt transmission mechanism 7, which also functions as a belt tension type traveling clutch, the hydrostatic continuously variable transmission 8 and the transmission case 4, And a drive system for driving the working device so that the power of the engine 6 is directly supplied to the power take-off shaft 10 via the belt transmission mechanism 9 and a work clutch (not shown). A steering handle 11 is extended obliquely upward from the upper part of the mission case 4, and while gripping the steering handle 11, the aircraft is run toward the handle extension direction side (right side in the drawing) to perform the pile driving work. It is configured to do. The steering handle 11 is configured to be switchable between a posture along the traveling direction of the machine body and a posture tilted obliquely rearward.

The pile driving device 2 carries out a work of driving inverted U-shaped piles K for tensioning a multi-seat in a field into a field at predetermined intervals [about 1 meter]. The configuration will be described below.

As shown in FIG. 5, the frame 12 of the pile driving device 2 is formed wider than the traveling machine body 1 and is fixed to the working device connecting portion 13 provided on the engine frame 5 and the mission case 4. It is connected and supported. Since the traveling wheels 3 and 3 are located on the left and right outer sides of the frame 12 [left and right outer sides of the pile row], the wheel drive shaft 14 of the mission case 4 and the axle 16 via the extension shaft 15.
The extension shafts 15 are supported by two left and right pillow blocks 17 in order to prevent the extension shafts 15 from bending and deforming due to the load of the working device.
The end of the frame 12 on the side opposite to the machine body connecting portion is grounded and supported by a pair of left and right caster wheels 18 whose height is adjustable. The pile driving device 2 includes a support portion 19 for supporting a large number of piles in an inclined posture, a feeding mechanism 20 for feeding the piles one by one from the support portion 19, and a driving portion 21 for driving the fed piles K into the ground. Each part is supported by the frame 12.

As shown in FIGS. 2 and 8, the support portion 19 has four support rails 22a and 22b arranged in the left-right direction in an inclined posture along the longitudinal direction of the machine body and in a bending posture of the pile K. Installed on each support rail 22a, 22b.
Are arranged and supported side by side in parallel, and the upper side of each pile row is configured to be pressed and supported by three pressing rods 23 in order to prevent lifting. The inclination angle of the support rails 22a and 22b is set to an angle such that the support rails 22a and 22b slide down due to their own weight [inclination of 25 to 30 degrees from the horizontal posture]. The pressing rod 23 has a connecting member 2 on both front and rear sides.
They are integrally connected by 3a and 23b, and are pivotally supported on the frame body 12 at the lower end portion so as to be rotatable around a horizontal axis X1 in a holding posture and an upward opening posture.

Each of the piles K is formed by bending a round bar into a substantially inverted U shape, and as shown in FIGS. 8 and 9, a synthetic resin holder 24 having a U-shaped cross section is externally fitted. , Both ends are fastened with screws 25 and integrally fixed to the pile K.
The holder 24 is locked to the two support rails 22a on the center side on the inner side of the arc-shaped portion, that is, at the positions where the support rails 22a and 22b are mounted and supported, to prevent the positional displacement from side to side. The locking portion 26 for locking is integrally formed.

Next, the delivery mechanism 20 will be described.
As described above, the pile rows, which are placed on the support rails 22a and 22b in the inclined posture and try to slide down by their own weight, are moved to the receiving position and the retracting position to release the receiving support by the electromagnetic solenoid. It is provided freely. More specifically, as shown in FIGS. 1, 8 and 9, the foremost position of a large number of pile rows guided by sliding and falling, the front position of the second pile from the front end side, and the middle of the pile rows. At each of the positions, a pair of left and right catches 27, 28, 29 are arranged so that each time the traveling machine body 1 travels a set distance [about 1 meter], one pile K is sent out one by one, and the pile rows are arranged one after another. In order not to apply the whole load to any one of the catches 27, 28, 29, each catch 27, 2
8 and 29 are configured so as to be sequentially controlled to move in and out. That is, as shown in FIGS. 1 and 10, the extension shaft 15
The endless chain 33 is wound around the sprocket 30 attached to the middle part of the sprocket and the sprocket 32 externally fitted to the upper fixed support shaft 31. The chain 33 is provided with abutment pieces 34 at appropriate intervals. Each time 3 travels about 1 meter, this contact piece 34 abuts on the three limit switches SW1, SW2, SW3 arranged close to the rotation locus so that each limit switch SW1, SW2, SW3 is sequentially operated. It is configured to enter and operate automatically. Then, when the limit switch SW1 that operates first is turned on and activated, the pair of receiving members 27 arranged at the foremost end excites the first electromagnetic solenoid SL1 so as to switch from the receiving posture to the releasing posture for a predetermined short time, Hereinafter, similarly, when the second and third limit switches SW2 and SW3 that operate are turned on and operated, the pair of catches 28 arranged at the front position of the second pile K and the intermediate position arrangement of the pile rows. The pair of receiving members 29 are sequentially driven to excite the second and third electromagnetic solenoids SL2 and SL3 so as to switch to the releasing posture for a predetermined short time. By setting the timing in this way, as shown in FIG. 9, when the front end catch 27 is in the release posture,
Only one pile K at the foremost end slides down to the front side and is guided to slide and fall, and the front end catch 27 returns to the catching posture,
When the second catch 28 is in the release position, the front half part of the pile row slides down and is supported by the front catch 27. Then, when the catch 29 in the intermediate position is in the releasing posture, the pile rows on the latter half side slide down and are moved one by one to the first half side to supply the shortage, and then immediately enter the catching posture, and the latter half pile row. Will receive the load of. still,
A notch portion 35 is formed at a position where the front end side receiving device 27 of the holder 24 mounted and fixed to the pile K acts so that the receiving device 27 can easily enter. Drive side sprocket 30 of the endless chain 33
A one-way rotation clutch 36 is interposed between the vehicle and the extension axle 15, and a reverse rotation prevention mechanism 37 is provided in the middle of rotation of the chain 33 so that the traveling machine body 1 travels in a predetermined direction [rightward in FIG. 1]. The chain 33 is rotated only when the traveling is performed, and the chain 33 is not rotated when traveling in the opposite direction.

Next, the driving part 21 will be described. As shown in FIGS. 3 and 4, three guide rollers 39 are provided on both left and right sides along the guide rails 38 provided on the vertical support columns 12a on the left and right sides of the frame body 12 on the right side in the machine body traveling direction. The sliding guide portion 40 slides and guides the driving tool 41 formed on the front view gate side so as to be able to move up and down in the vertical direction, and the screw shaft 42 is erected from the right and left intermediate portion of the driving tool 41. The female screw member 43 screwed onto the shaft 42 is driven in the forward and reverse directions to drive the driving tool 41 up and down with a constant stroke. The female screw member 43 is rotatably supported in a vertically fixed state by a bracket 44 that is continuously provided on the frame body 12, and is powered by the power take-off shaft 10 to be rotationally driven.
The transmission system will be described. As shown in FIGS. 1 and 5, from the power take-off shaft 10 to the first belt transmission mechanism 45,
Power is transmitted to a bevel gear mechanism 49 through a front-rear relay shaft 46, a transmission shaft 47 in an oblique posture, and a second belt transmission mechanism 48, which are provided at laterally outer side portions of the pile row, and the bevel gear mechanism 49 rotates vertically. The power transmission system has been modified so that the rotational power is supplied to the female screw member 43 via the third belt transmission mechanism 50, and the power transmission system is configured to bypass the pile row. As shown in FIG. 6, in the bevel gear mechanism 49, a pair of bevel gears 53 and 54, which mesh with the output side bevel gear 52, are fitted onto the input shaft 51 by idling, and a shift gear 55 is fitted on the input shaft 51 by spline fitting. By engaging one of the input bevel gears 53 and 54 with
The rotation direction of the output shaft 56, that is, the female screw member 43 can be switched between the normal rotation state and the reverse rotation state, and the bevel gears 53 and 54 are configured so as to be in a neutral state without engaging with each other. It should be noted that the switching arm 58 of the shift gear 55 and the operation lever 57 are linked so that the switching of the rotational state can be performed by the operation lever 57 provided on the side of the aircraft control section, and the driving tool 41 reaches the vertical movement limit. At this time, they are automatically linked to each other so as to be in a neutral state. That is, the operation lever 57 is linked to the switching arm 58 in a state of bypassing the pile row via the push-pull rod 59, the swing link 60, and the like. Then, as shown in FIG. 7, a rod 62 is hung from an arm 61 which is interlocked with the switching arm 58, and an operating piece 63 slidably fitted on the rod 62 is provided on the driving tool 41, and the driving tool 41. When the operating position 63 reaches either the ascending limit position or the descending limit position, the operating pieces 63 contact and are pushed and pulled to forcefully return to the neutral position. It is provided.

The operation levers 57 are provided on the left and right sides of a rotating rod 65 that is pivotally supported about a horizontal axis X2 at a position facing the airframe operating portion of the frame body 12, and the operating handle 11 is attached to the operating lever 57. It is configured so that the operation can be easily performed even when the work is performed by inclining in an oblique direction.

Next, the structure of the guide portion for guiding the piles K, which are sequentially fed out one by one as described above, to the driving standby position by the driving tool 41 without disturbing the posture will be described. As shown in FIG. 2, the pair of support rails 22b located on the left and right outer sides of the support portion 19 are provided on the end sides in the pile feeding direction so that one fed pile K is guided to slide and fall. The driving tool 41 is extended to the vicinity of the standby position so as to draw a smooth arcuate shape. In addition, the left and right driving parts 41a of the driving tool 41,
As shown in FIG. 11, a receiving guide plate 66, which is swingable around an oblique axis, is pivotally supported on the lower side surface of the pile K in the entry direction of the pile K, as shown in FIG. The side is below the driving operation portion 41a, that is, is reliably received and supported at the driving standby position. The receiving guide plate 66 is made of a synthetic resin material and has a pile K.
The swinging force toward the side opposite to the entering direction is regulated by abutment, and the swinging force is biased by the spring 67 so as to be regulated at a predetermined guide position. The spring urging force of the spring 67 is applied to the pile K even if the airframe advances after the pile K is driven.
It is set to a weak degree so that it can be retracted and swung in the direction opposite to the direction in which the aircraft travels without pushing down. With this configuration, after the driving is completed, the machine body can be run without raising the driving tool 41 to the predetermined rising position. Further, on the lower side of the right and left sides of the pile K guided by sliding and dropping, fixed to the frame body 12 is an inclined guide plate 68 for guiding slidably downward while receiving and supporting the lower end of the pile K. In order to prevent the pile K from being disturbed during falling, the rod body is bent into an L shape in order to guide it from above to the upper left and right sides of the pile K which slides and falls. A guide rod 69 is provided on the frame 12 in a fixed state. Further, when the driving stand-by position is reached, a left and right receiving member 70 is provided in a fixed state for contacting with the middle portion on the lower left and right side of the pile K to position it at the driving stand-by position. A leaf spring 71 is attached to an extension of the support rail 22b to guide the pile K into the lower side of the driving action portion 41a of the driving tool 41. Since the elastic member is thus configured, the driving tool 41 is configured so that it can be surely guided to the standby position as close to (or wrapped as possible) the movement trajectory of the vertically moving driving tool 41. Even if it comes into contact with, there is no risk of damage because it can be elastically retracted and displaced.

Explaining the procedure for driving the piles, the work vehicle is run while straddling the crop ridge in the field while the pilot handle 11 is set in an oblique posture so that the operator does not step on the crop ridge. When the vehicle travels a distance [about 1 meter], the feeding mechanism 20 is operated and only one pile is driven to be slid into the standby position and guided to slide. At this time, the guide mechanism as described above allows the pile K to be smoothly slid and guided toward the standby position without being disturbed in posture. Then, the driver disengages the traveling clutch to stop the traveling of the machine body, and operates the operating lever 57 to lower the driving tool 41 to drive the pile K into the ground. Then, the driving tool 41 is raised and the traveling machine body 1 is caused to travel again. After that, by repeating this work, the piles are driven in at predetermined intervals.

The work vehicle is also equipped with an extracting device 72 so that the driven tool 41 can be moved up and down to extract the driven pile. That is, the extracting device 72 is similar to that shown in FIGS.
As shown in FIG. 5, the U-shaped member 74 is rotated around the horizontal axis X3 in each of a pair of left and right fixing portions 73 that are integrally attached and fixed to the driving tool 41 and cantilevered in the front-rear direction. It is freely pivotally connected, and a pair of left and right extraction arms 75 are extended in a cantilever manner at the laterally extending portion of the U-shaped member 74. The U-shaped member 74 is received and supported by a contacting portion 76 provided on the fixed portion 73 in a horizontal posture positioned substantially on the same plane as the fixed portion 73, and is prevented from rotating downward from the upper side. Only the rotation to (1) is allowed. The extraction arm 75 is formed with a protrusion 77 for preventing the pile K from falling out during the operation of removing the pile K.
A storage unit 78 for storing and supporting the extracted piles K is provided near the rising position of the extraction device 72. The storage portion 78 has a support plate 80 attached and fixed to a hexagonal pipe shaft 79 which is erected and connected across both left and right sides of the frame body 12, and is manually mounted on a pair of left and right mounting tools 81 provided on the support plate 80. A suitable number [about 10] of piles K that can be carried by the device are constructed so that they can be mounted and supported, and a locking pin 82 for preventing slipping out is provided upright at the end of the mounting tool 81. When removing a pile driven into the ground, the extraction arm 72 is lowered to the lower end position and the extraction arm 75 is inserted into the lower side of the pile and lifted to extract the pile from the ground. Then, when the extracting device 72 rises to a predetermined position, the contact rod 83 fixed to the U-shaped member 74 abuts on the lower end of the support plate 80 of the accommodating portion 78, and as it rises thereafter, the U-shape is formed. The member 74 is relatively raised and rotated so that the pile is transferred to the storage portion and guided. The U-shaped member 74 is provided with a guide rod 84 for guiding the pile K into the storage portion 78 smoothly. In this way, the pile K can be extracted efficiently.

A sheet winding mechanism 85 for manually winding the multi-sheet S already stretched in the field is provided. That is, as shown in FIG.
A pair of left and right hexagonal shafts 86, 86 inserted and inserted into the hexagonal pipe shaft 79 from both left and right sides are fixedly supported by the frame body 12 via brackets.
And support it by tightening it with tightening bolts 88, and attach arms 89, 89 to the lateral outside of each hexagonal shaft 86, 86.
Support members 90, 90 for fitting and mounting the winding core cylinder member Sa of the multi-sheet S on the respective arms 89, 89.
Is rotatably provided. The core cylinder member Sa is connected to the support members 90, 90 by a pin so as to be integrally rotatable. A rotating handle 91 is provided on one of the supporting members 90, and the multi-sheet S can be sequentially wound by operating the handle 91 to manually rotate the core tube member Sa. I am doing it. Each of the support members 9
The positions of 0 and 90 can be set in a state suitable for the winding work by sliding the hexagonal shafts 86 and 86 in the left-right direction, and by replacing the hexagonal shafts and adjusting the angles by 60 degrees.

It should be noted that reference numerals are added to the claims for facilitating the comparison with the drawings, but the present invention is not limited to the configuration of the accompanying drawings by the entry.

[Brief description of drawings]

1] Overall side view of work vehicle

[Fig. 2] Side view of the pile feeding section

[Figure 3] Front view of the pile driving part

[Fig. 4] Front view of the pile driving part

FIG. 5 is a plan view of the frame body.

FIG. 6 is a vertical sectional side view of a bevel gear mechanism.

FIG. 7 is a side view showing an automatic stop linkage mechanism.

FIG. 8 is a cutaway front view of a pile support portion.

FIG. 9 is a side view of the pile support portion.

FIG. 10 is a side view of a sending-out control unit.

FIG. 11 is a front view of a pile driving section.

FIG. 12 is a plan view of the extracting device.

FIG. 13 is a side view of the extracting device.

FIG. 14 is a perspective view of a sheet winding mechanism.

[Explanation of symbols]

 19 Support part 41 Driving tool 66 Guide plate K pile

Claims (1)

[Claims] 1. A single pile (K) sent from a supporting portion (19) for supporting a large number of piles (K) side by side is driven up and down between an upper standby position and a lower driving position. With the driving tool (41), each time the vehicle travels a predetermined distance,
A pile driving device configured to be driven into the ground, the driving mechanism (41) of the driving tool (41).
In a), a guide plate (66) for receiving and supporting the sent-out pile (K) in the standby position is provided, and
A pile driving device that supports the guide plate (66) so as to be elastically retractable in the direction opposite to the machine traveling direction.