JP3271136B2 - Method for supporting chuck for vibratory pile punching machine and support mechanism for chuck for pile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of driving a pile into a ground by using a vibrating pile punching machine or pulling out a pile driven into the ground by raising a chuck holding the pile. The present invention relates to a device and a method for allowing a swinging device to be rotatable about a vertical axis and for supporting the rotation of the chuck so as to be able to be braked and released.

[0002]

2. Description of the Related Art FIG. 8 shows a state in which a pile is gripped by a vibrating pile punching machine, is suspended by a crane, and the pile is driven into the ground while vibrating the pile. A schematic front view in a state where the pile is pulled out while applying vibration to the pile is almost the same as this figure. Exciter 1
The chuck 2 is installed below the
Is gripping the top of the pile 3. The exciter 1 is suspended from the tip of a crane boom 5a by a hook 5b via a hanger 4. 5 is a crane having a self-propelled function. The vibrator 1 includes a type in which an eccentric weight is rotated to generate vertical vibration, and a type in which a hydraulic piston is moved up and down to generate vertical vibration. In either case, the generated vibration is transmitted to the pile 3 via the chuck 2. When the above-mentioned pile 3 vibrates, the static friction with the ground is cut and it becomes a state of dynamic friction.
It can sink into the ground by its own weight (specifically, the sum of the weight of the pile and the gravitational load of the shaker), and when it is lifted by the crane 5 with a relatively small force, it is driven into the ground. Pile 3 is pulled out.

FIG. 9 is a view for explaining a method of arranging and driving sheet piles, which are a kind of pile,
(A) is a plan view illustrating a state where four of a large number of sheet piles are connected to each other, and (B) is a plan view depicting a planning line set around a construction area. . (A) See FIG. Joints 6a and 6b are provided on both sides of the sheet pile 6 in the width direction, and the adjacent sheet piles are connected with the joint 6a, the joint 6a and the joint 6a.
b and the joint 6b are arranged in a 180-degree inverted position so as to engage with each other. However, the sheet pile is symmetrical in the width direction with respect to the center in the longitudinal direction, and the joints 6a and 6
“b” is a code that is distinguished for convenience, has no essential difference between the two, and can be used inverted.

In general, sheet piles arranged in a temporary storage area for materials in civil engineering construction work are arranged in the same direction as the irregularities. Therefore, the pile 3 (in this case, the sheet pile) is lifted by the crane 5 and FIG. In order to drive the pile 3 in the arrangement as shown in (A), it is necessary to rotate the pile 3 at least 180 degrees around the vertical axis Z-Z.
There are many types of piles used in civil engineering work. In the present invention, among the various types of piles, driving piles are applied, and among driving piles, those that are not rotationally symmetric (specifically). (Pipe and sheet pile with joints)
Is the subject of application. Hereinafter, in the present invention, when simply referring to a pile, it means a driving pile that is not rotationally symmetric.

The necessity of rotating a pile suspended by a crane about a vertical axis also occurs in the following case. (See FIG. 9B). When a planning line 7 is set around the construction area and steel pipe piles (not shown) having joints are arranged and driven, for example, when a large number of steel pipe piles are arranged along the planning line 7 as indicated by an arrow a. When the vehicle reaches the corner c, the traveling direction must be changed by 90 degrees as shown by the arrow b. In this case, the crane 5 (FIG. 8), which has been in a posture convenient for the arrangement in the direction of the arrow a, is changed to the arrow b in the same posture.
In order to arrange the steel pipe piles in the direction, it is desired to rotate the chuck 2 about a vertical axis. This is because even if the crane 5 is a self-propelled type, the operation of contracting the outrigger of the crane once and moving the outrigger and then remounting the outrigger requires a lot of time and labor. If a crane falls down, it will cause a serious accident, so determining its working posture requires a high level of knowledge and skill in checking the hard ground and adjusting the level of the vehicle body. Relocation of the crane is not easy.

On the other hand, whether or not the relative rotation of the exciter 1 and the chuck 2 about the vertical axis is possible depends on the type of the exciter, and the method of rotating the eccentric weight (rotary) The vibrator is generally not rotatable, and the method of reciprocating the hydraulic piston is generally free to rotate. In view of this, a technique for rotatably mounting a chuck on a vibration exciter with a rotary vibrator as an object to be applied is known (for example, Japanese Utility Model Publication No. 46-29020). FIG. 10 shows a construction of a driving sheet pile chuck which is made rotatable.
It is sectional drawing which cut | disconnected and drawn the principal part of the chuck rotation support apparatus based on No. 9020 with a perpendicular surface. The shaft member 8 is attached to the chuck 2 holding the pile 3, and a male screw 8 a is formed at a tip end thereof. On the other hand, below the shaker 1,
A bearing bracket 9 having a bearing hole 9a is fixed, the shaft member 8 is inserted into the bearing hole 9a, and a locking nut 10 is screwed to a male screw 8a of the shaft member 8 to perform a retaining function. I have. A bearing 11 is interposed between the bearing bracket 9 and the shaft member 8 so as to smoothen the rotation. Numeral 12 denotes a key plate for preventing the locking nut 10 from rotating, and numeral 13 denotes a mounting bolt for the key plate.

In addition, when a hydraulic piston type vibrator is used, the chuck rotates freely, so that it is necessary to prevent the rotation of the chuck holding the pile in order to perform an accurate pile driving operation. Become. From such a viewpoint, a device that prevents rotation of the chuck around its vertical axis without suppressing vibration is known (for example, Japanese Patent Publication No. H10-10528).
It is. FIG. 11 is a side external view showing an example of a piston rotation preventing device according to Japanese Patent Publication No. Hei 4-10528 configured to prevent rotation of the chuck with respect to the exciter.
The exciter 14 shown in FIG. 11 is a hydraulic piston type, and the exciter 14 itself does not restrict the rotation of the chuck 2. FIG. 12 is a vertical sectional view of the hydraulic piston type exciter provided with the rotation preventing device shown in FIG. In the exciter 14, a hydraulic piston 14b is accommodated in a hydraulic cylinder 14a fixed to a reaction force weight 15, and the chuck 2 is fixed to the hydraulic piston 14b. The reaction weight 15 is attached to the hanger 4 via the cushioning rubber 19. The hanger 4 is suspended by hanging a hook (not shown) of a crane on a suspension ring 4a. Hydraulic piston 14b
When the hydraulic pressure is applied to the stake, the chuck fixed to the stake moves up and down to move the pile 3 up and down. The arm / part 17 fixed to the reaction force weight 15 and the arm / upper 16 fixed to the chuck 2 substantially horizontally oppose each other. An elastic member 18 is disposed at the center. The above elastic member 18
Has a columnar shape, and the two ends of the
6 and the arm / part 17 are fixed. This allows
The vertical vibration of the chuck 2 relative to the reaction weight 15 is absorbed by the deformation of the elastic member 18 in the shearing direction, and the relative rotation about the vertical axis is limited by the compressive stress and the tensile stress of the elastic member 18. Since the block is blocked, the rotation angle position of the pile 3 held by the chuck 2 around the vertical axis is fixed.

[0008]

As shown in FIG. 10, when the rotation of the chuck 2 around the vertical axis with respect to the exciter 1 is made free as shown in FIG. 10, the crane is suspended via the chuck 2 (see FIG. 8). The work of rotating the pile 3 held about the vertical axis Z-Z is facilitated, but the angular position of the pile rotated to the desired angular position is unstable, so that accurate driving work is required. Difficult to accomplish. However, FIGS. 10 and 11
If the rotation of the pile 3 around the vertical axis is suppressed as shown in FIG. 9B, the problem described above with reference to FIGS. 9A and 9B occurs, and the piles having joints are arranged side by side. It will be very difficult to perform the installation work. Therefore, there is a demand for the development of a technique capable of freely rotating the pile 3 suspended by the crane 5 around the vertical axis Z and locking the rotation.

In order to simply support rotatably about a vertical axis or lock so as to be able to brake and release, it is sufficient to apply known mechanical means. Since there are special working conditions as described below, the rotation of the pile cannot be locked by a known technique. i) The rotation / lock mechanism must not only receive intense vertical vibrations, but also transmit the vertical vibrations generated by the vibrator to the chuck. For example, in the known technique shown in FIG. 10, a clearance is required between a rolling surface of the bearing 11 and a rolling element (ball or roller) so that the bearing 11 can rotate. However, if there is play, the rolling surface is hit, so that the service life of the bearing is significantly reduced. In addition, vibration is absorbed by the play in the bearing rolling surface, and the vertical vibration generated by the vibrator is attenuated while being transmitted to the chuck. ii) As easily understood from FIG. 8, when the pile 3 needs to be rotated around the vertical axis Z, the pile 3 is suspended in the air (the pile 3 is underground). After being driven into the stake, the stake 3 cannot be turned). Accordingly, in this state, the vibration exciter 1 and the chuck 2 are located at a high place where the worker on the ground cannot reach. For this reason, it is necessary that the lock related to the rotation of the chuck 2 and the release thereof can be remotely controlled.

In response to the above demand, the vertical vibration generated by the exciter can be transmitted to the chuck without attenuating, and the rotation of the chuck about the vertical axis with respect to the exciter can be remotely controlled. In order to be able to lock and unlock with a hydraulic excavator, a hydraulic cylinder attached to a vibration exciter can lift a pile chuck, and a brake means for tightening the outer periphery of a piston rod of the hydraulic cylinder is provided. And is effective. The above-described configuration is an unknown invention (Japanese Patent Application No. 7-319) filed separately by the present applicant.
No. 200), hereinafter referred to as the prior invention. Next, the prior invention will be described. FIG. 13 is a partial sectional view of a vibrating pile punching machine provided with a lock device according to an embodiment of the invention of the prior application. Reference numeral 1 denotes an exciter comprising a rotary vibrator having a structure in which an eccentric weight 1b is attached to a rotating shaft 1a, and is driven to rotate by a motor 1c.
As the motor 1c, a hydraulic motor or an electric motor can be used. A bearing bracket 56 is fixed to the exciter 1. A suspension shaft 55 projecting downward from the hanger 4 is inserted into a bearing hole of the bearing bracket 56, and a lower end of the suspension shaft 55. The seat 5 for the spring described later
7 is fixed. Externally fitted to the suspension shaft,
The upper spring 58 includes the hanger 4 and the bearing bracket 56.
, A lower spring 59 is interposed between the bearing bracket 56 and the receiving seat 57 by compression. Thus, the vibration exciter 1 is mounted on the hanger 4 via the buffer mechanism.

A lifting cylinder 5 is provided below the vibrator 1.
4 is mounted below, a bare lock (trade name) 22 which is a hydraulically actuated brake means is mounted, and the chuck 2 is mounted below. The above-mentioned bare lock 22 will be described later in detail with reference to FIG. 14, but in this embodiment, the shaft 22a of the bare lock 22 is integrally connected to the piston rod of the lifting cylinder 54, and the lower end of the shaft 22a Is fixed to the chuck 2. FIG. 14 is an explanatory view of the structure and function of the bear lock shown in FIG. 13 described above, wherein (A) shows a state in which the brake function is operating, and (B) shows a state in which the brake function is released. Each state is drawn. A brake sleeve 22b is tightly fitted to a shaft 22a having a right cylindrical surface, and O-rings 22c are provided at both ends of the brake sleeve 22b, respectively, and
A pressure supply port 22d for supplying a pressure fluid to the fitting surface is formed. When no other pressure is supplied to the pressure supply port 22d, the brake sleeve 22b tightens the shaft 22a by the elastic restoring force as shown in FIG. Longitudinal movement is also constrained. (B) As shown in the figure, when the fluid pressure P is supplied to the pressure supply port 22d, a pressure acts on the fitting surface between the shaft 22a and the brake sleeve 22b, and the diameter of the brake sleeve 22b expands. As a result, the shaft 22a is slidable in both the turning direction and the longitudinal direction. When the fluid pressure P is released, the state returns to the state shown in FIG. The fluid pressure P is preferably an oil pressure, but may be a hydraulic pressure or an air pressure.

As shown in FIG. 13, the lifting cylinder 5
4 is a hydraulic cylinder 54b fixed to the shaker 1,
It consists of a hydraulic piston 54a housed therein and a common piston rod with the shaft 22a of the bear lock 22. The hydraulic cylinder and the hydraulic piston in the present embodiment may be replaced with, for example, a hydraulic cylinder and a hydraulic piston, although they are not necessarily hydraulic.
However, since the pneumatic type has a cushioning effect, it must be a hydraulic type. Bear lock 22 (FIG. 1)
3) is connected to a hydraulic hose 23. The hydraulic hose 23 is a long member connected to a power unit (not shown) placed on the ground, and has a large weight.
Handling is cumbersome during transportation. For this reason, the hydraulic hose 2 is located not far from the connection to the bare lock 22.
3, and are detachably connected by a hydraulic coupler 24. When moving to the next work site after stakeout and pile removal work at a certain construction site, handling is easy if the hydraulic coupler 24 is detached and most of the hydraulic hose 23 is separated from the exciter. In addition, the hose can be prevented from being damaged due to poor handling. Although the brake means in the embodiment shown in FIG. 13 is a hydraulic bear lock 22, power for braking is supplied by the hydraulic hose 23, but a brake means operated by electricity may be used. In such a case, the hydraulic hose 23 is replaced by a cabtire cable (not shown) and the hydraulic coupler 24 is replaced by an electric connector (not shown). Further, since the hydraulic hose 23 is suspended in the air, it is likely that the hydraulic hose 23 is resonated and damaged when the vibration from the vibration exciter 1 is transmitted. Therefore, if a portion that is not far from the hydraulic coupler 24 provided on the hydraulic hose 23 is engaged with the hanger 4 or a member integrated with the hanger 4, it is effective to prevent the breakage due to the resonance described above. It is. Even when a cabtire cable is used instead of a hydraulic hose, resonance damage can be prevented by attaching the vicinity of an electrical connector (not shown) to a hanger.

However, according to the support mechanism of the chuck (2) according to the invention of the prior application shown in FIG. 13, the height of the entire pile punching machine is increased by the height H of the bare lock (22). When the height of the pile punching machine becomes large, the work becomes difficult when there is an obstacle above the work space and the height is restricted, for example, under construction of a bridge. Further, if the structure around the vertical axis is tightened by the brake means as in the invention of the prior application (FIG. 13), the frictional braking portion slips due to the vertical vibration of the vibration exciter, thereby causing wear and mechanical damage. There is a risk of causing chemical corrosion. The present invention has been made in view of the above-described circumstances, and without significantly increasing the height of the entire pile punching machine, and by vibrating the vibration transmitting member by the vertical vibration generated by the vibration exciter. An object of the present invention is to provide a technique for supporting a pile chuck that can surely prevent or release the rotation of a pile without causing a slip.

[0014]

The basic principle of the present invention created to achieve the above object will be briefly described with reference to FIG. 1 corresponding to one embodiment of the present invention. Is fixed to the cylinder 41. This cylinder is hydraulic,
Either a hydraulic cylinder or a pneumatic cylinder may be used. The piston rod 43 of the cylinder 1 is projected downward, and the chuck 2 is attached to the lower end thereof. The outer peripheral surface of the piston rod is not tightened by a brake. The reason is that there is a possibility that the friction braking surface by the brake may slip in accordance with the direction of the vertical vibration by the exciter 1. When a pressure fluid is introduced into a pressure chamber (a hydraulic chamber in FIG. 1) formed above the piston 42, the piston 42 is pressed down and abuts on the cylinder head 41c, and irregularities 61 formed on the bottom surface of the piston 42 are formed. And irregularities 6 formed inside the cylinder head of the cylinder 41
2 and 2 cannot be relatively rotated. When the piston 42 is temporarily fixed to the cylinder 41 as described above, the piston 42, the piston rod 43, and the pile 3 do not rotate around the Z axis, and The vertical vibration generated in the step (3) is transmitted to the pile 3 without receiving any particular attenuation. Based on the principle described above, the invention according to claim 1 is a method for supporting a pile chuck so as to be able to rotate and fix to a vibrating pile punching machine, the fluid having a piston rod protruding downward. While fixing the cylinder body of the cylinder means to the exciter, attaching a chuck to the lower end of the piston rod, introducing fluid pressure into a pressure chamber located below the piston of the fluid cylinder means. By lifting the chuck for holding the pile, and while rotating the piston of the fluid cylinder means away from the cylinder head, a turning force around the piston rod is applied to the chuck to rotate the pile gripped by the chuck. Adjust the moving angle position to a desired angle position, and introduce fluid pressure into a pressure chamber located above the piston of the fluid cylinder means. By rolling the chuck gripping the pile,
The rotation of the piston is prevented by engaging the unevenness provided on the lower surface of the piston of the fluid cylinder means with the unevenness provided on the inside of the cylinder head, and the rotation angle position of the pile gripped by the chuck is fixed, The above-described exciter is operated in a state where the rotation angle position of the pile is fixed as described above, and the vertical vibration generated by the exciter causes the above-described “pressure chamber located above the piston”. It is characterized in that the fluid inside, the piston, and the piston rod are sequentially transmitted to the chuck, and the pile held by the chuck is driven into the ground or pulled out from the ground. According to the first aspect of the present invention described above, by raising the piston of the fluid cylinder means so that the piston is in a floating state, the pile held by the chuck suspended by the piston is moved. Can be turned freely. Further, when the above-mentioned piston is lowered to engage the unevenness, the pile held by the chuck suspended by the piston cannot be turned. Further, when the rotation of the piston is prevented as described above, the friction surface is not worn because the friction brake is not used, and the pile is not likely to be rotated due to the slip of the brake. The motion blocking function is reliable.

According to a second aspect of the present invention, in addition to the first aspect of the present invention, a double-acting single rod type cylinder is used as the fluid cylinder means, and a cylinder bottom of the fluid cylinder means and a piston are provided. When a member that functions as a thrust bearing is placed between the two and the chuck that grips the pile is lifted, the force obtained by subtracting the “gravity load of the chuck, pile, and its attached members” from the upwardly acting fluid force When the piston rod and the piston are rotated around the vertical axis via the chuck while being supported by the member functioning as the above-described thrust bearing, and the chuck holding the pile is pressed down by the fluid pressure, the thrust bearing functions. It is characterized in that a thrust load due to fluid pressure is not applied to the member to be driven. According to the second aspect of the present invention, when the piston is raised to the "floating state" by implementing the first aspect of the invention, the piston functions as a thrust bearing even if the piston is fully raised. Since the member that stops the movement of the piston stops raising the piston and does not give any resistance to the rotation of the piston, the effect of the invention of claim 1 is easily and reliably exhibited.
Further, when the piston descends, no thrust force is applied to the member functioning as the thrust bearing, so that the member is idle, so that the member functioning as the bearing has the effect of the invention of claim 1 (holding the pile). (Which prevents the chuck from rotating).

According to a third aspect of the present invention, in addition to the configuration of the first aspect, a large number of ridges are arranged radially at equal pitches with respect to a center line of the fluid cylinder means, or the large number of ridges are provided. The ridges are arranged at equal pitches in parallel with the center line of the cylinder means, and a groove-like portion is formed between two adjacent ridges among a number of ridges arranged. It is characterized by forming irregularities. According to the third aspect of the present invention described above, since a large number of ridges forming the irregularities are arranged radially or in parallel and at an equal pitch, the rotation angle position of the piston with respect to the cylinder can be arbitrarily set. When adjusted, the concavities and convexities can be engaged with each other within the size range of the pitch. Thus, the adjustable rotation angle range can be set to 360 degrees.

According to a fourth aspect of the present invention, there is provided a method of supporting a pile chuck rotatably and fixedly with respect to a vibrating pile punching machine, wherein a cylinder body of a fluid cylinder means having a piston rod projected downward. The part is fixed to the exciter, a chuck is attached to the lower end of the piston rod, and fluid pressure is introduced into a pressure chamber located below the piston of the fluid cylinder means to grip the pile. In a state where the chuck is lifted, a turning force around the piston rod is applied to the chuck to adjust the rotation angle position of the pile gripped by the chuck to a desired angle position. The fluid pressure is introduced into the pressure chamber located above the piston, and the chuck holding the pile is depressed, so that the outside of the cylinder body of the fluid cylinder means is reduced. The protrusions and recesses provided on the chuck engage with the protrusions and recesses provided on the chuck to prevent rotation of the chuck and fix the rotation angle position of the pile gripped by the chuck. Operate the vibrator in a state where the position is fixed, the vertical vibration generated by the vibrator, the fluid in the above "pressure chamber located above the piston", and the piston, and It is characterized in that the piston rod is sequentially transmitted to the chuck via the piston rod, and the pile gripped by the chuck is driven into the ground or pulled out from the ground. According to the fourth aspect of the present invention described above, by raising the piston of the fluid cylinder means to a so-called “piston floating state”, the pile held by the chuck suspended by the piston is moved. Can be turned freely. Further, when the above-mentioned piston is lowered to engage the unevenness, the pile held by the chuck suspended by the piston does not rotate. Moreover,
When the rotation is prevented as described above, the friction surface is not worn because the friction brake is not used, and the pile is prevented from rotating due to the sliding of the brake. It is.

The structure of the invention according to claim 5 is the same as that of claims 1 to 4.
In addition to the configuration of the invention, a motor mounted on the cylinder body of the fluid cylinder means by lifting the piston of the fluid cylinder means equipped with a chuck for gripping the pile by fluid pressure so as to disengage the concavities and convexities. And a driven gear attached to the chuck is rotationally driven by the pinion. According to the fifth aspect of the present invention described above, the piston in the first aspect of the present invention is raised by fluid pressure to disengage the concavities and convexities, and the motor is operated in a state where the rotation of the piston and the chuck is free. Thus, the chuck can be rotated by power. Since the above-described power rotation can be remotely operated, there is no risk of accidental injury to the operator, and the operation is safe.

The structure of the invention according to claim 6 is the same as that of claims 2 to 5 above.
In addition to the configuration of the invention of the above, the top surface of the piston, and / or
Alternatively, one or a plurality of hard spherical members are disposed on the inner surface of the cylinder head and rotatably supported, and the spherical member functions as a thrust bearing, whereby the upward direction applied to the piston is increased. It is characterized in that it supports pressure and reduces friction acting on the rotation of the piston. According to the sixth aspect of the present invention described above, the "member functioning as a thrust bearing" in the second aspect of the present invention.
Can be fulfilled by a member that is simple, inexpensive and has excellent vibration resistance, and furthermore, there is no danger that the “member functioning as a thrust bearing” will fall off due to vibration.
In the first place, since the fluid cylinder means is a component for connecting the vibrator and the chuck, there is a great need to be excellent in vibration resistance.

The structure of the invention according to claim 7 is the same as that of claims 5 and 6.
In addition to the above structure, when engaging the irregularities by introducing and reducing the fluid pressure into the pressure chamber located above the piston, the rotation angle position of the pile gripped by the chuck is substantially desired. At the angular position, while rotating the motor that rotates the pinion at a rotation speed lower than the rated rotation speed, a fluid having a pressure lower than the rated pressure is supplied to the pressure chamber of the fluid cylinder at the rated flow rate. Introduce at a lower flow rate, lower the piston with a low force, at a low speed, and stop the rotation of the motor when the concavities and convexities come in contact, or make the rotation free, and introduce the fluid to be introduced into the fluid cylinder. It is characterized by increasing the pressure to the rated pressure. According to the invention of claim 7 described above,
When the irregularities start meshing, the two irregularities collide violently and generate abnormal noise, cracks such as splinters are generated, there is no risk that the irregularities will wear out early, and furthermore, Thereafter, the meshing state is reliably maintained. That is, the piston and the cylinder body (each having the cylinder head integrally connected) provided with the unevenness, respectively.
With a low force, the gears are slowly meshed with a small force, so there is no danger of generating a strong shock. It is.

According to an eighth aspect of the present invention, there is provided a mechanism for supporting a pile chuck with respect to an exciter of a pile punching machine, wherein a fluid cylinder means is disposed between the exciter and the pile chuck. A cylinder body portion of the fluid cylinder means is fixed to the bottom of the vibration exciter, a piston rod protrudes downward from the cylinder body portion, and a pile chuck is attached to a lower end portion of the piston rod. The fluid cylinder means is located inside the cylinder head, and concavities and convexities are formed in a ring-shaped area concentric with the fluid cylinder means, and irregularities corresponding to the irregularities are formed on the lower surface of the piston of the cylinder means. Is formed. According to the invention of claim 8 described above, since the piston rod faces downward, the lower end of the cylinder main body portion is a cylinder head,
In addition, since irregularities are formed inside the cylinder head (that is, on the upper surface side) and irregularities are formed on the lower surface of the piston corresponding to the irregularities, when the piston is lowered, the irregularities are engaged with each other. Therefore, the pile chuck connected to the piston does not rotate. Then, when the piston is raised, the engagement of the irregularities is released, and the relative rotation becomes free. In addition, since the above-mentioned unevenness is formed in a ring-shaped area concentric with the fluid cylinder, even when the piston is lowered from a state where the piston is rotated to an arbitrary angular position, the two unevennesses mesh with each other.

According to a ninth aspect of the present invention, in addition to the configuration of the eighth aspect of the present invention, a member capable of functioning as a thrust bearing is mounted on the inner surface of the piston top and / or the cylinder bottom of the fluid cylinder means. When the piston rises to the stroke end, it supports the thrust force on the cylinder body of the piston, and can reduce the frictional resistance of the rotation of the piston on the cylinder body, and The piston is not obstructed from moving away from the cylinder bottom. According to the ninth aspect of the present invention described above, when the piston is raised by the fluid pressure and the irregularities are separated from each other, the fluid pressure in the upward direction is supported by the thrust bearing (a member that can function as the thrust bearing). Then, the lifting of the piston is stopped and the rotational friction of the piston is reduced, so that the pile attached to the piston via the chuck is easily rotated. That is,
The prevention of rotation of the piston to which the pile chuck is attached according to the configuration of claim 8 and the prevention of free rotation of the piston according to the configuration of claim 9 combine with the configuration of the pile chuck. The pivot angle of the gripped pile can be adjusted arbitrarily.

According to a tenth aspect of the present invention, in addition to the eighth aspect of the present invention, the inner surface of the cylinder head and the lower surface of the piston are arranged radially at a constant pitch with respect to the center line of the fluid cylinder means. A ridge is formed, and a flat portion along a plane passing through the center line is formed near a central portion in the height direction of the radial ridge, and irregularities on the cylinder head side and the piston side are formed. When the projections and depressions mesh with each other, the plane portions of both projections and depressions are in surface contact with each other, and near the top of the radial projection, the thickness dimension of the projection toward the tip side is reduced. It is formed in a tapered shape in the direction of becoming smaller, and the edge of the tip is rounded, so that the engagement of both irregularities is induced so that sharp edges do not collide with each other. Specially To. Claim 10 described above.
According to the invention, since the concavities and convexities are in surface contact along the "surface passing through the center line of the fluid cylinder means", the relative rotation between the piston and the cylinder head is reliably prevented,
There is no danger that the local contact points will be damaged early. In addition, the engaging operation between the concave and convex portions is performed smoothly and quietly, and there is no danger of generating abnormal noise and impact at the time of the coupling, and the early wear and breakage of the concave and convex portions are prevented beforehand.

According to an eleventh aspect of the present invention, in addition to the configuration of the eighth aspect of the present invention, an unevenness formed concentrically with the fluid cylinder means inside the cylinder head of the fluid cylinder means, and / or The unevenness formed on the lower surface of the piston is not formed on the entire circumference of the annular area concentric with the fluid cylinder means, but is formed intermittently in the circumferential direction. According to the eleventh aspect of the present invention described above, the area in which the irregularities are formed is reduced, and the rotation of the piston is locked at an arbitrary angular position within the entire rotational angular position (360 degrees). Is also possible,
Further, by appropriately setting the concavo-convex formation area, it is also possible to configure so that a stopper function for limiting the rotation angle position to an arbitrary angular position range within the entire rotation angle position can be performed.

According to a twelfth aspect of the present invention, there is provided a mechanism for supporting a pile chuck with respect to an exciter of a pile punching machine, wherein fluid cylinder means is arranged between the exciter and the pile chuck. A cylinder body portion of the fluid cylinder means is fixed to the bottom of the vibration exciter, a piston rod protrudes downward from the cylinder body portion, and a pile chuck is attached to a lower end portion of the piston rod. The concave / convex portions corresponding to the above concave / convex portions are formed on the pile chuck while being positioned on the outer periphery of the cylinder head of the fluid cylinder portion, and concentric with the fluid cylinder portion. It is characterized by having been done. According to the twelfth aspect of the present invention described above, the outer peripheral portion of the fluid cylinder means can be provided without arranging the engagement / disengagement function member in the "place where daily inspection is impossible and the operation state cannot be visually observed" in the fluid cylinder means. Since the unevenness for performing the above-mentioned engagement / disengagement function is provided between the and the pile chuck, daily inspection is possible and the engagement / disengagement state of the unevenness can be visually confirmed during operation.

According to a thirteenth aspect of the present invention, there is provided the configuration of the eighth to eighth aspects.
In addition to the configuration of the twelfth aspect, a ring gear concentric with the piston rod, which is directly or indirectly fixed to one of the cylinder body and the piston rod of the fluid cylinder means, and the ring gear A pinion gear that meshes with the motor, and a motor that is directly or indirectly fixed to one of the cylinder body and the piston rod of the fluid cylinder means, and that rotationally drives the pinion gear. It is characterized by the following. According to the invention of the thirteenth aspect described above, by controlling the drive circuit of the motor, the pile chuck can be rotated or prevented from rotating by remote control. This allows the operator to operate the pile remote from the punching machine and adjust the pivot angle of the pile without touching the pile. As a result, the labor of the worker is reduced, and the risk of injury to the worker is significantly reduced, which is safe.

According to a fourteenth aspect of the present invention, there is provided the configuration of the thirteenth aspect.
In addition to the configuration of the invention, valve means for controlling the pressure or flow rate of a pipeline for supplying a pressurized fluid into a pressure chamber located above a piston of the fluid cylinder means, and An automatic control device is provided which performs a sequence control by interlocking the rotation speed of the motor for driving the rotation of the pinion gear with the valve means for controlling the pressure and the flow rate. Claim 14 described above.
According to the invention, the magnitude of the vertical movement force and the vertical movement speed of the piston can be adjusted by the valve means, and the rotation speed of the piston can be adjusted by adjusting the rotation speed of the motor. . That is, it is possible to control the relative movement speed in the circumferential direction of the unevenness and the approach speed in the meshing direction. Therefore, by performing sequence control of these control items by the automatic control device, it is possible to smoothly and quietly perform the engagement operation of the irregularities.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an embodiment of a support mechanism for a pile chuck according to the present invention, and is a diagram in which a hydraulic system is added to a schematic vertical sectional view, and the pile is rotated. It represents a state that can be confused. On the lower surface of the exciter 1, a returning single rod type fluid cylinder (a hydraulic cylinder 41 in the present embodiment) is fixed by projecting a piston rod 43 downward, and is fixed to a lower end of the piston rod 43. , A chuck 2 for the pile 3 is attached. The fluid pump (the hydraulic pump 25 in the present embodiment) is rotationally driven by a pump drive motor 34 to suck a working fluid (a working oil in the present embodiment) in a tank (the working flow tank 32 in the present embodiment). And pressurized and discharged. In practicing the present invention, hydraulic pressure, air pressure, etc. may be used instead of oil pressure. However, the embodiment will be described below using hydraulic oil pressure of hydraulic oil. The direction of the oil discharged from the hydraulic pump 25 is switched by a four-port, three-position solenoid operated valve 26, and a pressure chamber located above the piston 42 of the cylinder 41.
In addition, it can be made to flow into and out of the pressure chamber located below the piston 42 as desired.

In the present embodiment, since the piston rod 43 of the backward-moving-rod type cylinder 41 is used by projecting downward, the pressure chamber in contact with the piston top surface is located above the piston, and the cylinder bottom chamber is in contact with the piston bottom surface. I agree.
The pressure chamber located below the piston is synonymous with the cylinder head chamber. Furthermore, the cylinder bottom is intuitively shaped like a "cylinder ceiling", but in the present invention, regardless of whether the cylinder bottom is up or down with respect to the earth, "cylinder bottom" and "cylinder head"".

The pipe indicated by the symbol b is a piston 42
This is a line for supplying pressure oil acting in the direction of reducing the pressure of the oil, and the pressure in this line is automatically regulated by the pressure-reducing line pressure regulating valve 28. This pressure regulation pressure is set substantially equal to the rated discharge pressure of the hydraulic pump 25, and is 210 kg / cm ² in the present embodiment. The safety valve 33 and the pressure-sensitive switch 31 are for preventing the occurrence of abnormal pressure.
The pressure is set appropriately higher than the pressure reducing valve 28.
The pipe indicated by reference numeral h is a pipe for supplying a pressure acting in a direction to raise the piston 42, and the pressure of this pipe is automatically controlled by the lifting pipe pressure regulating valve 27. Pressure is regulated. This pressure regulation pressure is set to a value sufficient to raise the “piston 42 that suspends the pile 3 via the piston rod 43 and the chuck 2”, and is 90 kg / cm ² + α in the present embodiment.

When the solenoid operated valve 26 is operated to the raised operation position U, the piston 42 is raised. Irregularities 61 are provided on the lower surface of the piston 42, and irregularities 62 are provided on the inner surface of the cylinder head of the cylinder 41. The detailed structure of the irregularities will be described later with reference to FIG. 2. However, when the piston 42 is raised as shown in FIG. 1, the two irregularities are separated from each other, so that there is no particular effect. In this state, the piston 42 can rotate in the cylinder 41 regardless of the presence or absence of the irregularities 61 and 62. When a ring gear 36 is attached to the chuck 2 and a pinion gear 37 meshing with the ring gear is rotationally driven by a chuck drive motor 38, the pile 3 is rotated by a remote control, and the rotation angle position thereof is arbitrarily adjusted. Can be. When the pivot angle position of the pile 3 is adjusted as desired, the piston 42 is lowered by setting the solenoid operated valve 26 to the lowered position D and brought into contact with the cylinder head of the cylinder 41. Are locked, and the rotation of the piston 42 is locked so that the adjusted angular position does not change. When the piston 42 is raised to make the pile 3 free to rotate, when the piston 42 is pressed against the cylinder bottom of the cylinder 41 (in the figure, the ceiling of the cylinder is formed), the piston 42 rotates freely. become unable. For this reason, the frictional resistance to the rotation of the piston is reduced by any of the following methods (1) and (2). I. A “member that can function as a thrust bearing” is attached to the top surface of the piston 42. In this embodiment, a ball-shaped thrust receiver 44 is mounted at the center of the top of the piston 41. The details of the structure of the thrust receiver will be described later in detail with reference to FIG. 6. However, in the case of implementing the present invention, the thrust receiving member is not limited to the ball shape and is not limited to the center of the piston top surface. It may be attached to the periphery of the surface or the cylinder bottom. B. A bypass pipe 35 with a check valve is provided at an appropriate position of the cylinder 41 so that when the piston 41 attempts to rise beyond the connection point a of the bypass pipe, the pressure oil is bypassed and the pressure is reduced. .

As described above, the relative rotation of the piston 42 and the chuck 2 is locked by lowering the piston 42 by hydraulic pressure and engaging the irregularities 61 and 62 with each other. In the present embodiment, the automatic control device 63 is provided so that the comrades can be meshed well and that a strong collision does not cause abnormal noise or cracks. As shown in FIG.
1 and 62 are detached and the chuck driving motor 3
When the operator pushes an operation button (not shown) to give a stop command to the automatic control device 63 when the pile 3 is turned to a desired rotation angle position by operating the automatic control device 6, the automatic control device 6 is turned on.
Reference numeral 3 immediately lowers the rotation speed of the chuck drive motor 38 and reciprocates the chuck drive motor 38 at a slight speed at a small angle.
The small angle is about half the pitch of the irregularities (61, 62) in terms of the rotation of the chuck 2. This pitch will be described later with reference to FIG.

The automatic controller 63 which has received the above stop command
As described above, while the chuck 2 is reciprocatingly rotated, the electromagnetically operated valve 26 is moved to the lowered position D to lower the piston 42, and the adjustment pressure of the pressure reduction line pressure regulating valve 28 is reduced. Reduce the rolling force, and
The rotational speed of the pump drive motor 34 is reduced to reduce the discharge amount of the hydraulic pump 25, thereby
(I.e., the speed at which the irregularities 61 and 62 approach in the meshing direction). As a result, the two irregularities 61 and 62 are engaged without violently colliding. When the engagement between the concavities and convexities is completed, the adjusted pressure of the pressure reducing valve 28 is restored to the rated pressure, and the solenoid operated valve 2
6 is restored to the neutral position N.

By the automatic control device 63 of this embodiment performing the sequence control as described above, the two concavities and convexities 61 and 62 are smoothly and quietly engaged, and after the engagement, the engaged state is reliably maintained. . As can be easily understood from the above-described structural functions, the rotation speed of the pump drive motor 34 may be controlled to reduce the lowering speed of the piston 42, and the discharge rate is controlled by using the hydraulic pump 25 as a variable pump. The control may be performed by providing a flow control valve (not shown) in the hydraulic circuit. In the present invention, the control of the valve means as a means for adjusting the lowering speed of the piston and the control of the motor or the pump are technically equivalent.

FIG. 2 is a partially cutaway perspective view showing an embodiment of the unevenness in the support mechanism of the pile chuck according to the present invention, wherein (A) depicts unevenness formed radially, (B)
Denotes a gear-shaped unevenness. In the embodiment of FIG. 2A, a ring-shaped area around the lower surface of the piston and concentric with the center line Z,
The irregularities 61 having a constant pitch are formed, and the radial irregularities 6 are formed on the inner surface of the cylinder head of the cylinder 41.
Radial unevenness 62 corresponding to No. 1 (that is, having a shape that fits like a male type and a female type) is formed. In the embodiment of FIG. 2B, a concave portion 64 forming an internal gear ring gear centered on the center line Z is cut out on the inner side surface (upper surface in the figure) of the cylinder head. Correspondingly, a spur gear-shaped projection 63 is formed on the lower surface of the piston 42 and has a female / male relationship with the ring gear-shaped recess 64.

In FIG. 1A, a number of ridges are arranged at equal pitches along a radial centering on the center line Z, and groove-like valleys are formed between adjacent ridges. I have.
Further, in FIG. 2B, a number of ridges are arranged at equal pitches along a line parallel to the center line Z, and groove-like valleys are formed between adjacent ridges. In this way, a number of ridges are arranged radially or parallel to the center line Z,
And that they are arranged at equal pitch,
The piston 42 can rotate 360 degrees with respect to the cylinder 41, and the rotation can be locked by engaging the concave and convex portions around an arbitrary rotation angle within the rotation angle range of 360 degrees. it can. The meaning of "near" described above as "around an arbitrary rotation angle" is that "a margin is required within 1/2 of the arrangement pitch so that the peaks and valleys of the concavities and convexities are matched. That is, 1 for any rotational angle position.
Locked with an error within the / 2 pitch dimension.

FIG. 3 shows one embodiment of the unevenness in the support mechanism of the pile chuck according to the present invention, and FIG.
(B) and an example having an intermediate shape between the radial unevenness shown in FIG. 9 and the spur gear-shaped unevenness shown in FIG. Bevel gear-shaped irregularities 66 are formed on the lower surface of the piston 42. It is similar to the embodiment of FIG. 2A in that the teeth of the bevel gear are radial with respect to the center line Z, and in that the radial ridges are in the form of gear teeth. FIG.
This is similar to the embodiment of FIG. On the inner side of the cylinder head of the cylinder 41, there are formed concavo-convex portions 67 having a shape in which the bevel gear-shaped concavities and convexities 66 are made negative (a shape having a male / female relationship with the bevel gear-shaped concavities and convexities 66). . In this embodiment, since the direction TT of the tooth trace is oblique to the direction of engagement and depression Z-Z of the concave and convex without crossing at right angles, there is an advantage that the engagement is easy and smooth.

FIG. 4 is a developed sectional view showing the shape of the unevenness in the embodiment shown in FIG. 2 (A), and FIG. 4 (A) shows the radial unevenness on the piston side and the radial unevenness on the cylinder head side. (B) also shows a state in which radial irregularities are engaged. Radial irregularities 61 on the piston side in the present embodiment
Has a large number of ridges arranged at an equal pitch dimension p. Since the respective ridges are radially arranged, the above-mentioned equal pitch means an angular interval which is equal in polar coordinates. In the vicinity of the center in the height direction of each ridge, a surface contact portion 61a is formed along a plane including the center line Z (see FIG. 2) of the cylinder means. In this way, the two concaves and convexes come into surface contact with each other, so that a portion where the contact pressure is locally high does not occur. For this reason, there is no possibility that local early wear or cracks may occur, and the durability is excellent. The vicinity of the tip of the ridge becomes a tapered tapered portion 61b, and the leading edge 61c is rounded. The protrusion on the cylinder head side has the same shape as the protrusion on the piston side. Thus, when the two concavities and convexities are engaged, a sharp edge is smoothly guided to the engaged state without collision.

FIG. 5 shows an application example of the pile chuck support mechanism according to the embodiment shown in FIG. 2 (A), and FIG. 5 (A) is a partially broken perspective view. This figure (B) is a cross-sectional view taken along the arrow B. As shown in FIG.
FIG. 2B is compared with FIG.
5A, radial irregularities 61 are formed all around the lower surface of the piston. In FIG. 5, the radial irregularities 6 are intermittently divided in the circumferential direction without providing the radial irregularities 61 all around.
5a, 65b, 65c, and 65d are arranged.
Even with such a configuration, the adjustable range of the angular position of the piston 42 with respect to the cylinder 41 is 360 degrees. Although not shown, if the radial irregularities 62 on the cylinder head side are also divided and arranged intermittently in the circumferential direction, the angular position adjustable range 3
Within 60 degrees, a lockable angular position range and a non-lockable angular position range occur. In this case, the piston can freely rotate within the range of the angular position where the lock cannot be performed even if the piston is lowered, similarly to the case where the stoppers are provided on both sides of the range of the lock where the lock is not possible. Show similar behavior.

FIG. 6 is a cross-sectional view of an essential part showing an embodiment different from the embodiment of the pile chuck supporting mechanism shown in FIG. 1 above, in which a vibrator for mounting a cylinder and a chuck mounted on a piston are shown. This is indicated by a virtual line. Cylinder 4
Reference numeral 1 denotes a cylinder body 41a and a thick cylinder base plate 41b which are integrally connected to each other, and a cylinder head 41c is mounted on the cylinder body 41a, in which a piston 42 is housed. The piston rod 43 fixed to the piston 42 penetrates the cylinder head 41c in an oil-tight manner and protrudes downward, and is integrally connected to the piston base plate 42c. The cylinder base plate 41b is provided on the bottom of the
2 c are fixed to the top surface of the chuck 2, respectively.
On the top surface of the piston 42, a steel ball 44, which is located on the center line Z and acts as a thrust receiver, is mounted. The above-mentioned thrust receiving steel ball 44,
Cylinder base plate 41 forming the cylinder bottom
b.

In this embodiment (FIG. 6), a hole into which a steel ball 44 as a thrust receiver is inserted is formed in the piston 4.
2 is pierced on the top surface, and a steel ball 44 is inserted into the top surface and is caulked so as not to come off. Even with this configuration, when the piston 42 is raised by hydraulic pressure, the steel ball 44 acts as a thrust bearing to prevent direct compression of the piston 42 and the cylinder bottom, and the piston 42 is compared. It is supported so that it can be rotated with a very small force. In the configuration in which the steel ball 44 is crimped as in the above-described embodiment (FIG. 6), it is difficult to replace the steel ball, and a high degree of skill is required for caulking so that the steel ball does not come off even if subjected to vibration. For this reason, it is convenient to mount a steel ball on the piston or cylinder bottom as described below.

FIG. 7 shows an embodiment of a support mechanism for a pile chuck according to the present invention, which functions as a thrust bearing for supporting hydraulic pressure acting in the upward direction of a piston to reduce rotational frictional resistance of the piston. It is sectional drawing of a member. The outer peripheral surface of the plug 44b provided for tubing 44b _3.
As a result, the upper end face of the plug 44b in the drawing has a large diameter, and the lower end face has a small diameter. From the small-diameter end face of the plug 44 to the large-diameter end face, a female screw hole 4 that does not penetrate
4b ₁ and a ball seat 4 at the back of the female screw hole.
4b ₂ is formed. The ball seat is tapered hole that widens toward the female screw hole 44b _1, threshold is a shape similar thereto, is opened to a small diameter end of the tapered hole in the large diameter side end face of the plug 44b.

The steel ball 44a is
4b ₁ and engaged loosely fitted, and has a diameter sized to not get out to the small diameter side of the ball seat 44b _2, projecting a part of the large-diameter end face of the plug 44b (FIG. 5 reference). As described above the steel ball 44a is not escape, subjected to appropriate detent treated screwed ball retainer 44c having a male screw 44c ₁ into the female screw hole 44b _1. When screwing plug 44b to for tubing bore 42a ₁ of the piston body, a male screw 44c ₁ of the do not fall off even incomplete even detent. The ball retainer 44
The one end face of the c concave conical surface 44c ₂ is in the other end face wrench engagement hole 44c _3, it is formed.

In FIG. 1 described above, which is schematically drawn,
Although the ring gear 36 is directly fixed to the outer periphery of the chuck 2, specifically, as shown in FIG. 6, the ring gear 36 is attached to the chuck 2 via a piston base plate 42 c. In short, the ring gear 36 is mounted concentrically with the center line Z and so as not to rotate relative to the chuck 2. A pinion gear 37 meshing with the ring gear 36 is fixed to a rotation shaft of a chuck drive motor 38 fixed to a cylinder 41. In the present embodiment (FIG. 6), when the piston 42 rises, the steel ball 4
4 comes into contact with the hard seat 41e. Then, when the piston 42 descends, the radial irregularities 60 on the piston side fixed to the piston rod 43 via the piston base plate 42c form the cylinder head 41.
It is configured to engage with the cylinder head radial unevenness 61 formed at the position c, and to disengage when the piston is raised. In the present embodiment, one steel ball 44 is arranged on the center line Z, but a plurality of hard spherical members or thrust metal (not shown) is provided around the top surface of the piston 42. May be. Further, these hard spherical members or thrust metal may be mounted on the cylinder bottom instead of the piston.

[0045]

As described above, according to the embodiment of the present invention, the structure and function of the present invention are clarified. According to the first aspect of the present invention, the so-called "piston is lifted" by raising the piston of the fluid cylinder means. In this state, the pile held by the chuck suspended by the piston can be turned freely. Further, when the above-mentioned piston is lowered to engage the unevenness, the pile held by the chuck suspended by the piston cannot be turned. Moreover, when the rotation of the piston is prevented as described above,
Since the friction brake is not used, there is no wear on the friction surface, and there is no risk of the pile turning due to slippage of the brake, so that the function of preventing the rotation of the pile is assured.

According to the second aspect of the present invention, the piston is lifted and the "floating state" is realized by implementing the first aspect of the present invention.
In this case, even if the piston is fully lifted, the member functioning as a thrust bearing stops the upward movement of the piston and does not give any resistance to the rotation of the piston. , And is reliably demonstrated. Further, when the piston descends, no thrust force is applied to the member functioning as the thrust bearing, so that the member is idle, so that the member functioning as the bearing has the effect of the invention of claim 1 (holding the pile). (Which prevents the chuck from rotating).

According to the third aspect of the present invention, since the large number of ridges forming the irregularities are arranged radially or in parallel and at equal pitch, the rotational angle position of the piston with respect to the cylinder can be adjusted arbitrarily. In this case, the concavities and convexities can be engaged with each other within the dimension range of the pitch. Thus, the adjustable rotation angle range can be set to 360 degrees.

According to the fourth aspect of the present invention, the piston of the fluid cylinder means is raised to make a so-called "piston floating state", so that the pile held by the chuck suspended by the piston is free. Can be turned on. Further, when the above-mentioned piston is lowered to engage the unevenness, the pile held by the chuck suspended by the piston does not rotate. In addition, when the rotation is prevented as described above, the friction brake is not used, so that the friction surface is not worn, and there is no possibility that the pile is rotated by the slip of the brake. Is certain.

According to the fifth aspect of the present invention, the motor according to the first aspect of the present invention is operated by raising the piston by the fluid pressure so as to disengage the concavities and convexities, and to make the rotation of the piston and the chuck free. Thereby, the chuck can be rotated by power. Since the above-described power rotation can be remotely operated, there is no risk of accidental injury to the operator, and the operation is safe.

According to the sixth aspect of the present invention, the role of the "member functioning as a thrust bearing" in the second aspect of the invention can be fulfilled by a simple, inexpensive member having excellent vibration resistance. In addition, there is no possibility that the “member functioning as a thrust bearing” may fall off due to vibration. In the first place, since the fluid cylinder means is a component for connecting the vibrator and the chuck, there is a great need to be excellent in vibration resistance.

According to the seventh aspect of the present invention, when the irregularities start to mesh with each other, the two irregularities violently collide with each other to generate an abnormal noise, cracks that generate fragments, or the irregularities are worn out early. There is no danger of slipping, and the meshing state is reliably maintained after the meshing. That is, the relative rotational speed between the piston provided with the unevenness and the cylinder body (in which the cylinder head is integrally connected) is reduced, and the piston is slowly engaged with a weak force, so that a strong impact may be caused. After the engagement, the piston is firmly pressed against the cylinder head, so that the engagement is reliably maintained.

According to the eighth aspect of the present invention, since the piston rod is directed downward, the lower end of the cylinder body portion is a cylinder head, and irregularities are formed inside the cylinder head (ie, on the upper surface side). In addition, since unevenness is formed on the lower surface of the piston corresponding to the unevenness, when the piston is lowered, the two unevennesses engage with each other and cannot rotate relatively, and the pile chuck connected to the piston Also does not rotate. Then, when the piston is raised, the engagement of the irregularities is released, and the relative rotation becomes free. In addition, since the above-mentioned unevenness is formed in a ring-shaped area concentric with the fluid cylinder, even when the piston is lowered from a state where the piston is rotated to an arbitrary angular position, the two unevennesses mesh with each other.

According to the ninth aspect of the present invention, when the piston is raised by the fluid pressure to separate the concaves and convexes, the fluid pressure in the upward direction is supported by the thrust bearing (a member capable of functioning as a thrust bearing). The lifting of the piston is stopped, and the rotational friction of the piston is reduced, so that the pile attached to the piston via the chuck is easily rotated. That is, the piston to which the pile chuck is attached is prevented from rotating by the configuration of claim 8 and the piston is freely rotated by the configuration of claim 9, so that the piston for the pile is combined. The pivot angle of the pile held by the chuck can be adjusted arbitrarily.

According to the tenth aspect of the present invention, the above-mentioned concavities and convexities come into surface contact along the "plane passing through the center line of the fluid cylinder means", so that the relative rotation between the piston and the cylinder head is reliably prevented. Therefore, there is no fear that the local contact portion is damaged early. In addition, the interlocking operation between the concavities and convexities is performed smoothly and quietly,
There is no danger of impact, and early wear and breakage of the irregularities are prevented.

According to the eleventh aspect of the present invention, the area in which the irregularities are formed is reduced, and the entire rotation angle position (360
It is also possible to lock the rotation of the piston at any angular position within (degrees). It is also possible to configure so that a stopper function for limiting the position can be performed.

According to the twelfth aspect of the present invention, there is no need to dispose the engagement / disengagement function member in the "place where daily inspection is impossible and the operation state cannot be visually observed" in the fluid cylinder means. Since the unevenness that performs the above-mentioned engaging and disengaging function is provided between the pile chuck and the pile chuck, daily inspection is possible, and the engaged and disengaged state of the unevenness can be visually confirmed during operation.

According to the thirteenth aspect, by controlling the driving circuit of the motor, the pile chuck can be rotated or prevented from rotating by remote control. This allows the operator to operate the pile remote from the punching machine and adjust the pivot angle of the pile without touching the pile. As a result, the labor of the worker is reduced, and the risk of injury to the worker is significantly reduced, which is safe.

According to the fourteenth aspect, the magnitude of the vertical movement force and the vertical movement speed of the piston can be adjusted by the valve means, and the rotation speed of the piston is adjusted by adjusting the rotation speed of the motor. Can be adjusted. That is, it is possible to control the relative movement speed in the circumferential direction of the unevenness and the approach speed in the meshing direction. Therefore, by performing sequence control of these control items by the automatic control device, it is possible to smoothly and quietly perform the engagement operation of the irregularities.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a support mechanism for a pile chuck according to the present invention, in which a hydraulic system is added to a schematic vertical sectional view, showing a state in which the pile can be rotated. I have.

FIG. 2 is a partially cutaway perspective view showing an embodiment of unevenness in a support mechanism for a pile chuck according to the present invention, and FIG.
Represents the radially formed irregularities, and (B) depicts the gear-shaped irregularities.

FIG. 3 shows an embodiment of unevenness in the support mechanism of the pile chuck according to the present invention, in which the radial unevenness shown in FIG. 2A and the spur gear-shaped unevenness shown in FIG. An example of an intermediate shape is depicted.

FIG. 4 is a developed cross-sectional view showing the shape of the unevenness in the embodiment shown in FIG. 2A, in which the radial unevenness on the piston side and the radial unevenness on the cylinder head side are separated. FIG. 3B also shows a state in which radial irregularities are engaged.

FIG. 5 shows an application example of the pile chuck supporting mechanism according to the embodiment shown in FIG. 2 (A), and FIG. 5 (A) is a partially cutaway perspective view, (B) is a sectional view taken in the direction of the arrow B.

FIG. 6 is a cross-sectional view of a principal part showing an embodiment different from the embodiment of the pile chuck supporting mechanism shown in FIG. 1 above, in which a vibrator for mounting a cylinder and a chuck for mounting on a piston are indicated by phantom lines. It has been added.

FIG. 7 shows an embodiment of a support mechanism for a pile chuck according to the present invention, in which a member functioning as a thrust bearing for supporting hydraulic pressure acting in the upward direction of a piston to reduce rotational frictional resistance of the piston. It is sectional drawing.

FIG. 8 is a schematic front view showing a state in which a pile is gripped by a vibrating pile punching machine, the pile is suspended by a crane, and the pile is driven into the ground while vibrating the pile. And
The schematic front view of a state where the pile is pulled out while applying vibration to the pile is almost the same as that in this drawing.

FIG. 9 is a view for explaining a method of arranging and driving sheet piles, which are a kind of pile, and (A) illustrates a state in which four of a large number of sheet piles are interconnected. (B) is a plan view depicting a planning line set around the construction area.

FIG. 10 is a cross-sectional view of a main part of a chuck rotation supporting device according to Japanese Utility Model Publication No. 46-29020, which is configured to make a chuck of a driving sheet pile rotatable and cut by a vertical plane. is there.

FIG. 11 is a side external view showing an example of a piston rotation preventing device according to Japanese Patent Publication No. Hei 4-10528 configured to prevent rotation of the chuck with respect to the exciter.

12 is a vertical sectional view of the hydraulic piston type exciter provided with the rotation preventing device shown in FIG.

FIG. 13 is a partial sectional view of a vibrating pile punching machine provided with a lock device according to an embodiment of the invention of the prior application.

14A and 14B are explanatory diagrams of the structure and function of the bear lock shown in FIG. 13 described above, wherein FIG. 14A shows a state in which the brake function is operating, and FIG. 14B shows a state in which the brake function is released. Each state is drawn.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Exciter, 1a ... Rotating shaft, 1b ... Eccentric weight, 1c ... Motor, 2 ... Chuck, 3 ... Pile, 4 ... Hanger, 4a ...
Hanging ring, 5 ... Crane, 5a ... Crane boom, 5b ... Hook, 6 ... Sheet pile, 6a, 6b ... Coupling, 7 ... Striking design line, 8 ... Shaft member, 8a ... Screw, 9 ... Bearing bracket, 9a ... Bearing Hole: 10: Locking nut, 16: Arm / Instep, 17: Arm / Part, 18: Elastic member, 19:
Cushion rubber, 22: bare lock, 22a: shaft, 22
b: Brake sleeve, 22c: O-ring, 22d: Pressure supply port, 23, 23 ': Hydraulic hose, 24: Hydraulic coupler, 25: Hydraulic pump, 26: Solenoid operated valve, 27: Lifting line pressure regulating valve, 28 ... Down-pressure line pressure regulating valve, 29 ... Pilot check valve, 30 ... Accumulator, 31 ... Pressure-sensitive switch, 32 ... Hydraulic oil tank, 33 ... Safety valve, 34 ... Pump drive motor, 35 ... Bypass line with check valve,
6 ring gear, 37 pinion gear, 38 chuck drive motor, 41 cylinder, 41a cylinder body,
41b: Cylinder base plate, 41c: Cylinder head, 42: Piston, 42c: Piston base plate, 42a ₁ : Taper screw hole for pipe, 43: Piston rod, 44: Thrust receiver (steel ball), 44a ...
Steel ball, 44b ... plug, 44b ₁ ... female screw hole, 44b ₂ ... ball seat, 44b ₃ ... for tubing, 4
4c ... Ball retainer (male screw member), 44c ₁ ... male screw, 44c ₂ ... concave conical surface, 44c ₃ ... wrench engagement hole, 5
4: Lifting cylinder, 45a: Hydraulic piston, 45b
... hydraulic cylinder, 55 ... suspension shaft, 56 ... bearing bracket, 57 ... seat, 58 ... upper spring, 59 ...
Lower spring, 61 ... radial irregularities on the piston side, 61
a ... surface contact portion, 61 b ... taper portion, 61 c ... rounded ridge, 62 ... radial unevenness on the cylinder head side, 62 a ...
Surface contact portion, 62b taper portion, 62c rounded ridge, 63 spur gear-shaped projection, 64 internal gear-shaped recess, 65a
65d: divided radial projections, 66: bevel gear-shaped irregularities, 67: negative bevel gear-shaped irregularities.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 13/00 E02D 7/18

Claims (14)

(57) [Claims] 1. A method for supporting a pile chuck rotatably and fixedly with respect to a vibrating pile punching machine, wherein a cylinder main body of a fluid cylinder means having a piston rod protruding downward is mounted on the vibrating pile punching machine. And fix it,
A chuck is attached to the lower end of the piston rod, a fluid pressure is introduced into a pressure chamber located below the piston of the fluid cylinder means, the chuck for holding the pile is lifted, and the piston of the fluid cylinder means is moved. In a state of being separated from the cylinder head, a turning force around the piston rod is applied to the chuck to adjust the rotation angle position of the pile gripped by the chuck to a desired angle position. Fluid pressure is introduced into the pressure chamber of the cylinder means, which is located above the piston, and the chuck holding the pile is depressed, thereby providing the fluid cylinder means with irregularities provided on the lower surface of the piston and inside the cylinder head. The rotation of the piston is prevented by meshing with the irregularities, and the rotation angle position of the pile gripped by the chuck is fixed. Then, the exciter is operated in a state where the rotation angle position of the pile is fixed, and the vertical vibration generated by the exciter is transmitted to the above-mentioned “pressure chamber located above the piston”. The fluid, and the piston, and the piston rod are sequentially transmitted to the chuck through the chuck, and the pile gripped by the chuck is driven into the ground,
Alternatively, a method for supporting a chuck for a vibration pile punching machine, wherein the chuck is pulled out from the ground. 2. A reciprocating single rod type cylinder is used as said fluid cylinder means, and a member functioning as a thrust bearing is arranged between a cylinder bottom of said fluid cylinder means and a piston, and a pile is gripped. When the chuck is lifted, the force obtained by subtracting the `` gravity load of the chuck and the pile, and its attached members '' from the upwardly acting fluid force is supported by the member functioning as the thrust bearing through the chuck, When the piston rod and the piston are rotated around the vertical axis, and the chuck holding the pile is lowered by the fluid pressure, the member functioning as the thrust bearing,
The method for supporting a chuck for a vibrating pile punching machine according to claim 1, wherein a thrust load due to fluid pressure is not applied. 3. A plurality of ridges are radially arranged at equal pitches with respect to the center line of the fluid cylinder means, or the plurality of ridges are arranged at equal pitches parallel to the center line of the cylinder means. The vibrating pile according to claim 1, wherein a groove-like portion is formed between two adjacent ridges among a number of ridges arranged to form the unevenness. A method of supporting a chuck for a punching machine. 4. A method of supporting a pile chuck rotatably and fixedly with respect to a vibrating pile punching machine, wherein a cylinder main body of a fluid cylinder means having a piston rod protruded downward is mounted on the vibrating pile punching machine. And fix it,
A chuck is attached to the lower end of the piston rod, a fluid pressure is introduced into a pressure chamber located below the piston of the fluid cylinder means, and the chuck for holding the pile is lifted, and To provide a rotating force around the piston rod to adjust the rotation angle position of the pile gripped by the chuck to a desired angle position, and to the pressure chamber of the fluid cylinder means located above the piston. The fluid pressure is introduced, and the chuck holding the pile is lowered, thereby engaging the unevenness provided on the outer surface of the cylinder body of the fluid cylinder means with the unevenness provided on the chuck, and rotating the chuck. The exciter was actuated in a state in which the rotation angle position of the pile gripped by the chuck was blocked and fixed, and the rotation angle position of the pile was fixed as described above. Vibration in the vertical direction is transmitted to the chuck via the fluid in the “pressure chamber located above the piston”, the piston, and the piston rod sequentially, and is held by the chuck. Driving a stake into the ground
Alternatively, a method for supporting a chuck for a vibration pile punching machine, wherein the chuck is pulled out from the ground. 5. The fluid cylinder means having a chuck for gripping a stake is lifted by a fluid pressure to lift a piston of the fluid cylinder means so that the concavities and convexities are separated from each other. The method for supporting a chuck for a vibrating pile punching machine according to any one of claims 1 to 4, wherein the pinion is rotated to rotate a driven gear attached to the chuck. 6. The top surface of the piston and / or
On the inner surface of the cylinder head, one or a plurality of hard spherical members are arranged and supported rotatably, and the above-mentioned spherical members function as thrust bearings, so that the upward pressure applied to the piston is reduced. A method for supporting a chuck for a vibrating pile punching machine according to any one of claims 2 to 5, wherein the friction acting on the rotation of the piston is reduced by being supported. 7. The method according to claim 7, wherein when the fluid pressure is introduced into the pressure chamber located above the piston to reduce the pressure, the rotation angle position of the pile gripped by the chuck is substantially desired. When the angular position is reached, while rotating the motor that rotates the pinion at a rotation speed lower than the rated rotation speed, a fluid having a pressure lower than the rated pressure is supplied to the pressure chamber of the fluid cylinder at a rated flow rate. Also, introduce the piston with a small flow rate, lower the piston at a low speed with a small force, and stop the rotation of the motor when
The method for supporting a chuck for a vibrating pile punching machine according to claim 5 or 6, wherein the pressure of the fluid introduced into the fluid cylinder is increased to a rated pressure while the rotation is free. 8. A mechanism for supporting a pile chuck with respect to an exciter of a pile punching machine, wherein a fluid cylinder means is disposed between the exciter and the pile chuck. A main body portion fixed to the bottom of the vibration exciter, a piston rod protruding downward from the cylinder main body portion, and a pile chuck attached to a lower end portion of the piston rod; It is located on the inside of the head, and irregularities are formed in an annular area concentric with the fluid cylinder means, and irregularities corresponding to the irregularities are formed on the lower surface of the piston of the cylinder means. Characteristic, pile chuck support mechanism. 9. A piston top of said fluid cylinder means,
And / or a member capable of functioning as a thrust bearing is mounted on the inner surface of the cylinder bottom. When the piston rises to the stroke end, the piston supports a thrust force on the cylinder body portion of the piston and the cylinder body of the piston. 9. The pile chuck according to claim 8, wherein the frictional resistance of the rotation to the portion can be reduced, and the piston does not hinder the operation of separating from the cylinder bottom. Support mechanism. 10. The inside of the cylinder head, and
On the lower surface of the piston, ridges are formed radially at an equal pitch with respect to the center line of the fluid cylinder means, and near the center in the height direction of the radial ridges,
A plane portion is formed along a plane passing through the center line,
When the irregularities on the cylinder head side and the irregularities on the piston side mesh with each other, the plane portions of both irregularities are in surface contact with each other, and the vicinity of the top of the radial ridge is directed toward the tip. The ridges are formed in a tapered shape in the direction in which the thickness dimension of the ridges decreases, and the edges of the ridges are rounded, so that the engagement of the two irregularities is such that sharp edges do not collide with each other. The support mechanism for a pile chuck according to claim 8, wherein the support mechanism is adapted to be guided. 11. The unevenness formed concentrically with the fluid cylinder means and / or the unevenness formed on the lower surface of the piston inside the cylinder head of the fluid cylinder means is concentric with the fluid cylinder means. The support mechanism for a pile chuck according to claim 8, wherein the support mechanism is not formed on the entire circumference of the annular area but is formed intermittently in a circumferential direction. 12. A mechanism for supporting a pile chuck with respect to an exciter of a pile punching machine, wherein a fluid cylinder means is disposed between the exciter and the pile chuck. A main body portion fixed to the bottom of the vibration exciter, a piston rod protruding downward from the cylinder main body portion, and a pile chuck attached to a lower end portion of the piston rod; Positioned on the outer periphery of the head, irregularities are formed in a ring-shaped area concentric with the fluid cylinder means, and irregularities corresponding to the irregularities are formed on the pile chuck. To support the chuck for piles. 13. A ring gear concentric with the piston rod, directly or indirectly fixed to one of the cylinder body and the piston rod of the fluid cylinder means, and a pinion gear meshing with the ring gear. A motor that is directly or indirectly fixed to the other of the cylinder body portion and the piston rod of the fluid cylinder means, and that rotationally drives the pinion gear. The support mechanism for a pile chuck according to any one of claims 8 to 12, wherein: 14. A valve means for controlling a pressure or a flow rate of a pipe for supplying a pressure fluid into a pressure chamber located above a piston of said fluid cylinder means, and said pinion gear is provided. 14. The pile chuck according to claim 13, further comprising an automatic control device for performing a sequence control by interlocking a rotation speed of a motor for rotationally driving the valve and valve means for controlling the pressure and the flow rate. Support mechanism.