JPH0629514B2 - Guide device for vibrating pile driver - Google Patents

Description

TECHNICAL FIELD The present invention relates to a guide device for a vibrating pile driver, which guides a vibrating pile driver main body so that the leader can be moved up and down.

[Conventional technology]

Hereinafter, a conventional guide device for a vibrating pile driver will be described with reference to FIGS.
It will be described with reference to the drawings.

In the figure, reference numeral 1 denotes a vibrating pile driver main body, and the vibrating pile driver main body 1 has a motor 11 mounted on an upper surface of a vibrating machine 10. Are linked by a power transmission mechanism 12 such as a pulley and a belt. By driving the above-mentioned motor 11, the eccentric shaft is rotated via the power transmission mechanism 12, and forced vibration in the vertical direction is generated in the vibrator 10. Equipped with a rotating device 13 on the lower surface of the above-mentioned vibration generator 10,
A chuck 14 is provided on the lower surface of the rotating device 13. A hanger 16 is attached to the vibrator 10 via a shock absorber 15. Two guide arms 17 are provided on a side surface of the vibrating machine 10 facing a later-described leader 2 at predetermined intervals and project in the vertical direction.

Reference numeral 2 denotes a leader supported by a work vehicle (not shown). The leader 2 has a lattice structure, and two guide pipes 20 are provided on a side surface facing the vibrating pile driving body 1 at predetermined intervals. And plant it up and down.

Reference numeral 3 denotes a guide member interposed between the vibrating pile driver main body 1 and the leader 2. The guide member 3 includes a main body 30 and guide surfaces 31 provided on the left and right side surfaces of the main body 30 in the vertical direction. Body 30
It is composed of four guide slashes 32 provided on the upper, lower, left and right sides of the surface facing the reader 2, and a hanger 33 provided on the upper surface of the main body 30.

Thus, the guide device for the vibrating pile driver shown in FIGS. 3 and 4 (hereinafter simply referred to as the former) engages the guide pipe 20 of the leader 2 with the guide slash 32 of the guide member 3 so as to be able to move up and down. Then, a sub wire 43 from a sub winch (not shown) of the work vehicle is coupled to the hanger 33 of the guide member 3, and the guide member 3 is suspended from the reader 2 so as to be able to move up and down. Next, the guide surface 17 of the guide member 3 is engaged with the guide arm 17 of the vibrating pile driver body 1, and the hanger 16 of the vibrating pile driver body 1 is engaged with the main winch (not shown) of the work vehicle.
The main wire 41 is connected to the vibration pile driving machine main body 1 via the guide member 3 so as to be vertically movable with respect to the reader 2.

Further, the guide device for a vibrating pile driver shown in FIG. 5 (hereinafter referred to as the latter) includes a hanger 16 to an arm 18 of the vibrating pile driver main body 1.
Projecting toward the leader 2 side, and the tip of the arm 18 and the guide member 3
Is connected to the hanger 33 of the guide 2 by the connecting wire 40, the guide slash 32 of the guide member 3 is engaged with the guide pipe 20 of the leader 2 so that the hanger 16 of the vibrating pile driver main body 1 is connected to the hanger 16 of the work vehicle. The main wire 41 from the winch is joined, and the vibrating pile driver main body 1 is attached to the leader 2 via the guide member 3.
It can be hung up and down.

Next, the operation of driving a pile will be described. First, the vibrating pile driver main body 1 is raised, and then a pile (not shown) is set up and held by the chuck 14. Then, the motor 11 is driven to generate vertical forced vibration in the vibration generator 10, and the vertical forced vibration is transmitted to the pile via the rotating device 13 and the chuck 14. And in the former case,
The main wire 41 and the sub wire 43 are fed out in synchronization with each other, and the vibrating pile driver main body 1 and the guide member 3 are synchronized and lowered. In the latter case, the main wire is fed out, the vibrating pile driver main body 1 and the guide member 3 are lowered, and the pile is driven into the ground.

In such a guide device for a vibrating pile driver, the vibrating pile driver main body 1 is mounted on the reader 2 via the guide member 3 so as to be able to move up and down. Therefore, as in the case where the vibrating pile driver main body 1 is directly mounted on the reader 2, The vibration of the vibration exciter 10 is not transmitted to the leader 2 or the pile is not driven vertically or at a predetermined inclination angle.

[Problems to be solved by the invention]

However, the former uses the main wire 41 to vibrate the pile driver main body 1
And the guide member 3 with the sub wire 43.
The main wire 41 and the sub wire 43 are fed out in synchronism with each other, and the vibrating pile driver main body 1 and the guide member 3 are synchronized and lowered, so that the operator operates the main winch while visually observing how the pile is inserted. It is necessary to operate the sub winch and the sub winch at the same time, and the operability is extremely complicated.

In the latter, the arm 18 is projected from the hanger 16 of the vibrating pile driver main body 1 toward the reader 2 side, and the connecting wire 40 is inserted from the tip of the arm 18.
Since the guide member 3 is suspended by the above, a horizontal component force against the gravity of the guide member 3 acting in the vertical direction acts on the arm 18, which causes an unbalanced load on the receiving portion of the vertical shaft 19 of the shock absorber 15. As a result, uneven wear occurs in the receiving portion of the vertical shaft 19. On the other hand, a horizontal component force against the gravity of the vibrating pile driver main body 1 acting in the vertical direction acts on the arm 18, which acts as a rotational moment on the leader 2 via the guide member 3, and thus the vibrating pile driver main body. There is a problem in that the higher the position of 1 is, the larger the rotational moment acts on the reader 2.

Therefore, there has been filed a guide device for a vibrating pile driver, which is not complicated to operate and is capable of suppressing the generation of large unbalanced loads and rotational moments. As such a guide device for a vibrating pile driver, there is, for example, a device described in Japanese Patent Application No. 58-17304 (No. 59-125537).

This vibrating pile driver guide device includes a spring (40) between the vibration mechanism (42) and the connecting member (38), and an elastic force between the vibration mechanism (42) and the frame body (44). Material (5
4) are respectively interposed and are connected.

However, the above-described guide device for the vibrating pile driver simply includes the spring (40) between the vibration mechanism (42) and the connecting member (38), and the vibration mechanism (42) and the frame body (4).
Since the elastic member (54) is interposed between the elastic member (4) and the elastic member (4) to connect them, the spring (4
0) and the elastic member (54) may be destroyed by the vibration of the vibration generating mechanism (42). And in the unlikely event of a spring (4
0) and the elastic member (54) are destroyed, the vibration mechanism (4
2) or the frame body (44) may fall off and fall.

An object of the present invention is a fixed body fixed to a vibrating pile driver main body,
It is an object of the present invention to provide a guide device for a vibrating pile driver that can prevent breakage of a buffer connecting body that is interposed between an engaging body that is vertically movable with a leader and that connects the engaging body.

[Means for solving problems]

The present invention is for a horizontal direction between a fixed body and an engaging body, which abuts before the breaking stress of the buffer coupling body reaches the maximum value with respect to the mutual horizontal movement of the fixed body and the engaging body. A vertical direction in which a stopper is provided and abutment is made between the fixed body and the engaging body before the breaking stress of the buffer coupling body reaches the maximum value with respect to the mutual vertical movement of the fixed body and the engaging body. It is characterized in that a stopper for use is provided.

[Action]

According to the present invention, since the horizontal stopper and the vertical stopper come into contact with each other before the breaking stress of the buffer connecting body reaches the maximum value, the present invention prevents the buffer connecting body from being broken. You can In addition, even if the buffer connection body is broken, the stopper for the vertical direction abuts, so that there is no possibility that the engagement body will fall off and fall.

〔Example〕

An embodiment of a guide device for a vibrating pile driver according to the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, the same reference numerals as those in FIGS. 3 to 5 indicate the same parts.
It should be noted that illustration of the rotating device and the chuck is omitted in the figure. In the figure, reference numeral 21 denotes guide rails laid vertically on both sides of the leader 2 on the side of the vibrating pile driver main body 1.

Reference numeral 5 denotes a fixed body fixed to the surface of the vibrating pile driver main body 1 facing the leader 2. The fixed body 5 is a central fixed portion 50 and left and right protruding from both ends of the central fixed portion 50 in the same direction. It is composed of both side fixed parts 51, 51 and has a U-shape when viewed from above. The central fixing part 50 and the left and right fixing parts 51, 51 are constructed by welding a vertical plate, a horizontal plate and ribs.
The left and right fixed parts 51 on both ends of the central fixed part 50 thus formed,
The surface of 51 opposite to the projecting direction is fixed to the surface of the vibrating pile driver body 1 facing the leader 2 with bolts 52 or the like.

Reference numeral 6 denotes an engaging body which is engaged with the reader 2 so as to be able to move up and down. The engaging body 6 is slightly smaller than the space of the fixed body 5 having a U-shaped planar shape and has a height slightly higher than the height of the fixed body 5. The storage unit 60 includes upper and lower engaging portions 61, 61 provided in the upper and lower sides at both ends of the surface of the storage unit 60 facing the reader 2. The accommodating portion 60 and the engaging portions 61, 61 are constructed by vertical plates, horizontal plates, ribs, and the like that are welded together. The storage portion 60 thus formed is stored in the space of the fixed body 5, and the engaging portion 6
The guide rails 21, 21 of the reader 2 are engaged with the rails 1, 61 so as to be able to move up and down.

Reference numeral 7 denotes a buffer connecting body that connects the fixed body 5 and the engaging body 6 to each other. The buffer connecting body 7 has a buffer member 70 made of a cylindrical rubber plate or the like, and one side is slightly smaller than the diameter of the buffer member 70. It has a large square shape and is composed of mounting plates 71 fixed to both ends of the cushioning member 70 with an adhesive or the like. The above-mentioned cushioning member 70 has the amplitude value of the vibration generator 10 within the range of the allowable shear stress. The buffer member 70 may be a spring other than the rubber plate. Thus, the four corners of the facing surface of the central fixed portion 50 of the fixed body 5 and the storage portion 60 of the engaging body 6 and the facing surfaces of the left and right side fixed portions 51, 51 of the fixed body 5 and the storage portion 60 of the engaging body 6 are formed. The buffer connection bodies 7 are attached to the upper and lower sides in a total of 8 places. That is, the mounting plate 71 of the buffer connecting body 7 is bolted to the central fixing portion 50 and the left and right side fixing portions 51, 51 of the fixing body 5 and the accommodating portion 60 of the engaging body 6.
The fixing member 5 and the engaging member 6 are connected by the buffer connecting member 7 by attaching them by 72 or the like.

Reference numeral 8 denotes a horizontal stopper, and this stopper 8 is a housing for storing a first stopper member 81 having a U-shaped planar shape which is vertically fixed to left and right fixing portions 51, 51 of a fixed body 5, and an engaging body 6. The portion 60 includes a second stopper member 82 which is housed in the space of the first stopper member 81 and fixed vertically. The stopper 8 for the horizontal direction is a buffer member of the buffer connection body 7 against the mutual horizontal movement of the fixed body 5 and the engagement body 6.
The first stopper member 81 and the second stopper member 82 come into contact with each other just before the shearing stress of 70 reaches the maximum value, restricting the horizontal movement of the fixed body 5 and the engaging body 6 to each other, and This is to prevent shearing of the cushioning member 70 of 7.

9 is a stopper for the vertical direction, and this stopper 9 is made of a rubber member, and the upper and lower horizontal plates of the left and right fixed parts 51, 51 of the fixed body 5 face the upper and lower horizontal plates of the storage part 60 of the engagement body 6. Then attach it with bolts 90, etc. The stopper 9 for the vertical direction is engaged with the engaging member 6 before the shear stress of the buffer member 70 of the buffer connecting member 7 reaches the maximum value with respect to the mutual vertical movement of the fixed member 5 and the engaging member 6. The upper and lower horizontal plates of the storage portion 60 of the buffer body 60 are contacted with each other to regulate the vertical movement of the fixed body 5 and the engagement body 6 to prevent the shock absorbing member 70 of the shock absorbing connecting body 7 from being sheared. In the unlikely event that 70 is sheared, the upper horizontal plate of the engaging body 6 comes into contact with the stopper 9,
It is possible to prevent the engagement body 6 from dropping.

The guide device for a vibrating pile driving machine according to the present invention in this embodiment has the above-described structure, and the operation for driving a pile will be described below.

First, the vibrating pile driver main body 1 is raised, and then the pile is set up and held by the chuck. Then, the motor 11 is driven to generate vertical forced vibration in the vibration generator 10, and the vertical forced vibration is transmitted to the pile via the rotating device and the chuck. Then, the main wire 41 is fed out, the engaging body 6 is lowered through the vibrating pile driver main body 1, the fixed body 5, and the buffer connecting body 7, and the pile is driven into the ground.

At this time, since only the main wire 41 is fed out and the engaging body 6 is lowered via the vibrating pile driver main body 1, the fixed body 5, and the buffer connecting body 7, the main wire 41 and the sub wire are fed out in synchronization with each other. Operability is better than that of a guide device for a vibrating pile driver.

Further, since the fixed body 5 fixed to the vibrating pile driver main body 1 and the engagement body 6 engaged with the leader 2 are connected by the buffer connecting body 7, the elastic connecting action of the buffer member 70 of the buffer connecting body 7 causes the fixed body 5. , Component force of the vibrating pile driver main body 1 and the fixed body 5 against gravity, component force of the engaging body 6 against gravity, the vibrating pile driver body 1
It is possible to absorb the forced vibration in the vertical direction. That is, for the load in the direction a in FIG. 2, the central fixing portion 50
The buffer connection pair (hereinafter referred to as the first buffer connection body) 7 interposed between the storage part 60 and the storage part 60 receives the shear stress, and is interposed between the left and right fixing parts 51, 51 and the storage part 60. The mounted buffer connection body (hereinafter referred to as the second buffer connection body) 7 receives the compression and the tension. Further, with respect to the load in the direction B, the first buffer connecting pair 7 receives the compression and the tension, and the second buffer connecting pair 7 receives the shear stress. Further, with respect to the load in the vertical direction, the first buffer connecting body 7 and the second buffer connecting body 7 receive shear stress. As a result, it is possible to absorb the unbalanced load generated in the vertical bearing portion of the shock absorber of the vibrating pile driver main body 1, the rotational moment generated in the leader 2, and the vibration transmitted from the vibrating pile driver main body 1 to the leader 2. it can.

In the above embodiment, the stopper 9 for the vertical direction is used.
Is a rubber member, but a spring or the like may be used instead.

〔The invention's effect〕

As is apparent from the above, in the present invention, the stopper for the horizontal direction and the stopper for the vertical direction come into contact with each other before the breaking stress of the buffer connecting body reaches the maximum value. Can be prevented. In addition, even if the buffer connection body is broken, since the stopper for the vertical direction comes into contact with the buffer connection body, there is no possibility that the engagement body will fall off and fall.

[Brief description of drawings]

FIG. 1 is a partial side view showing an embodiment of a guide device for a vibrating pile driver of the present invention, and FIG. 2 is a view taken in the direction of arrow II in FIG. FIG. 3 is a side view showing a conventional guide device for a vibrating pile driver suspended by a main wire and a sub wire, and FIG. 4 is a view taken along the arrow IV in FIG. FIG. 5 is a side view showing a conventional guide device for a vibrating pile driver suspended by a main wire and an arm. 1 ... Vibration pile driver main body, 2 ... Leader, 5 ... Fixed body,
6 ... Engaging body, 7 ... Buffer connection body, 8 ... Horizontal stopper, 9 ... Vertical stopper.

Claims (1)

[Claims] 1. A guide device for a vibrating pile driver, which guides the vibrating pile driver body to a leader so as to be able to move up and down, a fixed body fixed to the vibrating pile driver body, and an engagement body which is vertically movable engaged with the leader. Provided between the fixed body and the engagement body, and a buffer connection body that is interposed between the fixed body and the engagement body to connect the fixed body and the engagement body. On the other hand, a horizontal stopper that abuts before the breaking stress of the buffer connection body reaches the maximum value, and the stopper is provided between the fixed body and the engagement body, and the vertical direction of the fixed body and the engagement body is perpendicular to each other. A vertical stopper that abuts before the breaking stress of the buffer coupling body reaches the maximum value with respect to the above movement.