JPS6117638A - Horizontal type composite vibrator - Google Patents

Abstract

PURPOSE:To enable a pile to be driven or drawn out according to the ground by composite vibration by a method in which the rotation phases of each of left- and right-handed and behind and front (four) paired vibrating shafts are regulatively controlled through planetary gears and fixed and rotary gears by remote control system. CONSTITUTION:A horizontal composite vibrator consists of the body 1, left- and right-handed, before, and behind paired (4) vibrating shafts 4a-4d, and planetary gears 9, fixed gears 11, and rotary gears 13 to transmit drive forces in a phase regulating manner to the vibrating shaft 4a serving as a drive shaft and other vibrating shafts 4b-4d. The vibrating shafts 4a-4d are turned in the same direction on the behind and front sides but reversely turned on the right and left sides. The fixing angle of the fixed gear 11 is adjusted through a worm gear 22 provided to the outside of the body 1. The phase difference in each vibrating shaft can thus be regulated and any composite vibration can be used for driving and drawing piles.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention is used for driving and pulling out piles, compacting the ground, etc., and generates vertical vibration and torsional vibration simultaneously or separately, and furthermore, generates vibration modes using an oscillator. This invention relates to a horizontal compound vibration oscillator that can be remotely controlled during stoppage or operation.

With this type of oscillator that generates complex vibrations, if the vibration force in the vertical and torsional directions is appropriately adjusted and applied according to the conditions of the target ground, energy-efficient work can be promoted and construction work can be improved. Vibration pollution to the outside of the boundary is less likely to occur.

Incidentally, the target ground often has different properties in the depth direction, and the vibration mode of the excitation force needs to be changed arbitrarily during operation of the oscillator.

On the other hand, in order to make effective use of the site, modern building structures are increasingly built underground, and the piles that are driven tend to be longer. There is a need to.

However, in view of such actual circumstances, conventional compound oscillators have the following drawbacks.

In other words, compound vibration oscillators that utilize the rotational motion of an eccentric weight have been used for a relatively long time, and for example,
There is one disclosed in Publication No.-5636.

However, the oscillator in the same issue has four eccentric weights attached to two rotating shafts arranged on the same plane, and the phase difference can be adjusted by attaching the eccentric weights to the hollow shaft. The hollow shaft and the rotary shaft are connected through a bottle at the end, and the vibration mode cannot be changed while the oscillator is operating because this is done by removing the bottle and rotating either shaft. It had, so to speak, a fatal flaw.

In addition, in a structure in which an eccentric weight is attached to a hollow shaft and the hollow shaft and the rotating shaft are connected with a bottle, the rigidity of the hollow shaft and the joint part is 9
Another drawback was that the output of the oscillator could not be increased very much due to strength constraints.

By the way, the present applicant has developed a compound vibration oscillator that can change the vibration mode while the oscillator is operating, and has published Japanese Patent Application Laid-Open No. 56-122
It has already been provided in Publication No. 419.

However, this oscillator also has the following problems.

The oscillator disclosed in this publication has an oscillation shaft having an eccentric weight arranged in two stages, upper and lower, and employs a bevel gear device as a mechanism for transmitting rotation to each oscillator and adjusting the phase.

Therefore, if the output of the oscillator is increased by increasing the eccentric weight, the vertical length will be increased by one step, and the pile length will be sacrificed by an amount corresponding to this length.

In addition, since bevel gears are used, the entire mechanism becomes complicated, and the meshing accuracy of each gear must be made highly accurate, resulting in an increase in cost.

The present invention has been made in view of the above-mentioned problems, and its purpose is to have a relatively simple configuration, and to enable the vibration mode to be changed to a desired vibration mode by a remote device during stoppage and operation. The object of the present invention is to provide a horizontal compound vibration oscillator with high power and high output.

In order to achieve the above object, the present invention has four oscillation shafts each having an eccentric weight and each rotatably supported, arranged in the front-rear direction so that the axes of each pair are in the same direction, and
They are arranged in a plane in the front, rear, left and right so that their axes are parallel, and one of the oscillation shafts is used as a drive shaft, and the oscillation shafts of the front and rear pairs are rotated in the same direction, and the oscillation shafts of the front and rear pairs are rotated in the same direction. The other is rotated in the opposite direction, and the rotational speed of each oscillation shaft is the same.The rotational force is transmitted to the middle of the oscillation shaft, and one diagonal is rotated by a remote device. It is characterized by intervening a power transmission section that can rotate the pair of oscillation shafts located above by a predetermined angle and adjust the phase difference with respect to the pair of oscillation shafts located diagonally on the other side.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an explanatory diagram of the principle of lifting according to the present invention, in which four oscillation axes A, A', B, B' having eccentric weights W of the same weight are used.
, a pair (A and B', B and A'') arranged in the front and back direction.
The oscillation axes A, A', and B are arranged in a plane in front, rear, left, and right so that their axes are in the same direction and their respective axes are parallel.

B' rotates at the same number of rotations in the direction of the arrow.

That is, the oscillation axes of the front and rear pairs (A and B', B and A') rotate in the same direction, and the left and right oscillation axes (A and 8 degrees, A' and 8') rotate in the same direction.
), the direction of rotation is reversed.

Here, the oscillation axes A and A' located diagonally are called the main oscillation axis, and B and B' are called the sub oscillation axes, and the phase angle of the sub oscillation axis with respect to the main oscillation axis, that is, the position of the eccentric weight, is adjusted as appropriate. It is assumed that the angle can be set.

First, when the phase angles of the main oscillation axes A, A' and the sub oscillation axes B, B' are the same (the phase difference is zero), each oscillation axis A, A'
, B, B' are shown in FIG. 1 (a-1>.

It rotates in the states shown in (a-2), (a-3), and (a-4).

At this time, the excitation force due to the centrifugal force of the eccentric weight W is the excitation force in the torsional direction as shown in the figure <a -2) +' (a -4)
As shown in , it acts in the opposite direction and becomes zero, so it acts only in the vertical direction.

Next, when the phase difference between the main oscillation axes A and A' and the advanced oscillation axes B and B' is π (180°), each eccentric weight W is
1), (c-2), (c-3).

It rotates in the state shown in (c=4).

In this case, the excitation force in the vertical direction is as shown in the same figure (C-1),
As shown in (C-3), since the directions are opposite and the magnitudes fluctuate equally, they cancel each other out and become zero.

However, the excitation force in the torsional direction is (c-2), (
As shown in c-4), the direction is the same, and the left and right oscillation axes (
A and B, A' and B').

Furthermore, when the phase difference between the main oscillation axes A, A' and the auxiliary oscillation axes B, B' is 90°, each eccentric weight W] is as shown in Fig. 1 (b-1), (b-2 >, (c-3)
.

(It rotates in the state shown in b-4>.

In this case, the excitation force in the vertical direction and the excitation force in the torsional direction have a smaller imaging width than when the phase difference is zero or π, but the excitation force in the vertical direction has the same period, that is, the maximum excitation force in the vertical direction. When this happens, the excitation force in the torsional direction also changes to become maximum.

In the case of θ<π, vibration is generated mainly due to the excitation force in the torsional direction.

Next, a concrete example based on the above principle of oscillation will be described.

2 to 5 show an embodiment of a compound vibration oscillator according to the present invention, and FIG. 2 is an explanatory diagram of its overall configuration, and the oscillator accommodates an oscillation shaft, etc., which will be described later. An oscillator main body 1, a driving electric motor R2 attached to the upper surface of the oscillator main body 1, a pulley 3 fixed to the rotating shaft of the electric motor 2, four oscillating shafts 4a, 4b rotatably supported within the main body 1, 4c, 4
d, in this embodiment, a belt 6 wound around a pulley 5 fixed to the outwardly projecting end of the oscillation shaft 4a, and transmits the rotation of the electric motor 2 to the oscillation shaft 4a. It looks like this.

As shown in FIG. 3, eccentric weights 7 each having a substantially semi-cylindrical shape are attached to the oscillation shafts 4a, 4b, 4c, and 4d.
They are individually positioned approximately on the same plane on the main body 1 at predetermined intervals in the front, rear, left, and right directions, and are rotatably supported.

A power transmitting section constituted by a planetary gear mechanism is interposed between the oscillation shafts 4a, 4b, 4c, and 4d to transmit rotation between the respective shafts and to adjust the phase difference between them.

The power transmission section includes a hollow rotating housing 8 rotatably supported by the main body 1, a planetary gear 9 located within the rotating housing 8 and rotatably supported by the rotating housing 8, and the rotating housing 8 and the main body 1. A fixed sun gear 11 is rotatably supported between the rotating housing 8 and the main body 1, and one end of the fixed sun gear 11 is fixed to the other end of the support shaft 10 that protrudes outward from the main body 1. A rotating sun gear 13 is fixed to one end of a transmission shaft 12.

A gear 8a and a sprocket 8b are carved on the outer periphery of the upper and lower ends of the rotary housing 8, the gear 8a meshes with a driving gear 14 attached to the other end of the oscillation shaft 4a, and the sprocket 8b engages with the oscillation shaft 4a. It is connected via a chain 21 to a driven sprocket 15 attached to the oscillation shaft 4d located on the diagonal line of the oscillation shaft 4a.
d rotates in the opposite direction to the oscillation axis 4a.

On the other hand, a pair of gears 9a and 9b are formed in a stepped manner on the outer peripheral surface of the planetary gear 9, one gear 9a is connected to the fixed sun gear 11, and the other gear 9b is connected to the rotary sun gear 13. They mesh with each other.

Further, a pair of sprockets 12a and 12tl are fixed to the other end of the transmission shaft 12, and one sprocket 12a has its axis in the same direction as the oscillation shaft 4a, and the oscillation The other sprocket 12b is connected to a sprocket 16 attached to the shaft 4b via a chain 17, and the other sprocket 12b is connected to a sprocket 18a fixed to one end of an intermediate shaft 18 rotatably supported on the main body 1 above the transmission shaft 12. A gear 1811 connected via a chain 19 and further fixed to the other end of this intermediate shaft 18
meshes with the gear 20 of the oscillation shaft 4G located on the diagonal of the oscillation shaft 4b.

In the above-described configuration, the oscillation shaft 4a is connected to the driving electric motor I.
When I2 rotates clockwise in the direction of the solid line arrow shown in FIGS. 2 and 3, the driving gear 14 also rotates in the same direction, and since this gear 14 and the gear 8a of the rotating housing 8 are meshed, the rotating housing Rotation number 8 is a left rotation.

As the rotating housing 8 rotates, the planetary gear 9 rotatably supported by the rotating housing 8 will also rotate in the same direction. However, if the support shaft 10 is fixed, the planetary gear 9 will be rotated on the outer periphery of the fixed sun gear 11. It revolves around its axis.

This rotation of the planetary gear 9 causes the transmission shaft 12 to rotate to the right, and the oscillation shaft 4b connected to the transmission shaft 12 by a chain rotates to the right. The axis 4C rotates to the left.

Here, since the oscillation shaft 4d rotates in the opposite direction to the oscillation shaft 4a as described above, it rotates to the left.

In other words, a pair of oscillation shafts 4a and 4b in the front and back direction.

4C and 4d rotate in the same direction, and the rotation directions between the pair are opposite rotations.

Next, the relationship between the numbers of teeth of each gear and sprocket described above will be explained.

For convenience, the number of teeth of a bogie gear etc. is designated as follows.

One gear 9a of the planetary gear 9: Za.

The other gear 9b: Zb.

Fixed sun gear 11: ZC.

Rotating sun gear 13: Zd, driving gear 14: Ze.

One gear 8a of the rotating housing 8: Zf.

Same sprocket 811 near (1° Driven sprocket 15: Zh.

One sprocket 12a of the transmission shaft 12: Zi.

Same other sprocket 12b: Zj.

Sprocket 16 of oscillation shaft 4b: Zk.

Sprocket 18a of intermediate shaft 18: Zl same gear iab
:zm Gear 20 of the oscillation shaft 4C:Zn If the number of teeth is selected so that the oscillation shaft 4d is the driving gear 141, the gear of the rotating housing 8 (3a, the sprocket 8b, and the driven gear 15), the oscillation shaft 4a and the oscillation shaft 4d are The rotation speeds are the same, and the rotation speed of the oscillation shaft 4a is +Na, and the rotation speed of the oscillation shaft 4d is Nd.

On the other hand, the rotational speed of the rotating housing 8 is Nδ, and the transmission shaft 1
Assuming that the number of rotations of the transmission shaft 12 is N, as shown in this formula, the rotation direction of the transmission shaft 12 varies depending on the number of teeth of the planetary gear 9, etc., and 7b x Zc
If >7-a x7d, the transmission shaft 12 rotates in the opposite direction to the rotary housing 8, and if Zb XZC<ZaXZ', the transmission shaft 12 and the rotary housing 8 rotate in the same direction.

In this embodiment, the relationship ZbxZC>ZaXZd is adopted, and the transmission shaft 12 rotates in the opposite direction with respect to the rotation housing 8.

Rotation is transmitted to the oscillation shaft 4b via a transmission shaft 12 and sprockets 12a and 16. Therefore, if this number of rotations is Nb, in order to rotate at Rotate.

By selecting the number of teeth as described above, each oscillation shaft 4a, 4b, 4c, 4d can be rotated at the same rotation speed, and each pair of oscillation shafts 4a, 4b and oscillation shaft 4c, 4d in the front and rear direction can be rotated at the same rotation speed.
It is possible to rotate the two in the same direction but in opposite directions.

Next, the phase difference adjustment mechanism will be explained. This mechanism includes a fan-shaped flat worm wheel 22 fixed to the end protruding from the main body 1 of the support shaft 10, a worm 23 rotatably supported by the main body 1 that meshes with the worm wheel 22,
3, and a motor 25 connected to the end of the worm shaft 24.

Here, the meshing relationship between the worm wheel 22 and the worm 23 is determined by the friction angle due to tooth surface contact.
If the advance angle of is selected to be small, a self-clamping gear is formed, and the worm 23 cannot be rotated from the worm wheel 22 side, but the worm wheel 22 can be rotated from the worm 23 side, and in this way, the support shaft 10 can be fixed at a desired position with respect to rotation of the oscillation shaft 4a.

The motor 25 and the worm shaft 24 are connected by a key or a spline.
The support shaft 10 may be fixed more reliably by using a hydraulic motor or an electric motor with a reduction gear and a built-in mechanical brake, or a mechanical locking device.

In addition, instead of this motor 25, a fluid actuator or the like can be selected as appropriate, and the phase difference adjustment mechanism can also be replaced with the worm wheel 22 and the worm 23 by using a lever, a bottle, a
Needless to say, an appropriate rotation mechanism such as a locking mechanism can be used.

Adjustment of the phase difference is performed as follows.

When the motor 25 is rotationally driven by remote control and the support shaft 10 and the fixed sun gear 11 fixed thereto are rotated in the direction of the dotted line arrow A in FIG. , the oscillation axes 4a and 4d are stationary.

As a result, the rotation of the support shaft 10 is transmitted to the transmission shaft 12 via the planetary gear 9, causing it to rotate in the direction of the dotted arrow.

The rotation of the transmission shaft 12 is transmitted to the oscillation shaft 4b via the chain 17, and to the oscillation shaft 4C via the chain 19 and gears 18b and 20.
and rotates them at the same rotational speed in the directions of the dotted arrows C, which are opposite to each other.

Therefore, when the fixed sun gear 11, that is, the support shaft 10 is rotated by an appropriate angle, the oscillation shafts 4b and 4c located diagonally
can be rotated by a predetermined angle.

As a result, the oscillation axis 4a and 4d are
b, 4C can be set to any phase difference, and the vibrations in the vertical direction and torsional direction explained using the above-mentioned conceptual diagram can be generated simultaneously or separately.

Now, in the horizontal compound vibration oscillator having the above-mentioned configuration, the phase difference between the oscillation axes 4a, 4b, 4c, 4c+ can be adjusted continuously and arbitrarily by remote control while the machine is at rest or in operation. This enables driving of piles with a vibration mode that is optimal for the properties of the pile.

In addition, phase adjustment and each oscillation axis 4a, 4b, 4C, 4d
Transmission of rotation to is performed by a planetary gear mechanism, which has two functions, resulting in a simpler structure and higher rigidity than when using a bevel gear mechanism.

Furthermore, even if the suspension of the eccentric weight 7 is increased to increase the output,
Oscillation axis 4a, ,4. Since b, 4c, and 4d are on the hoho plane, compared to the two-stage arrangement,
The height is not very large and can easily accommodate driving long piles.

d3, in the phase difference setting described above,
For example, by attaching a rotary encoder, potentiometer, etc. to + 24, or attaching a limit switch, proximity switch, etc. around the worm wheel 22,
Needless to say, a remote sensing device is provided for numerically determining the set value of the phase difference.

As explained above, the compound vibration oscillator according to the present invention is
This is a space-saving horizontal oscillator that is applied to long piles, etc., and can generate vibrations in the vertical and torsional directions by changing the phase difference of the oscillation axis with each eccentric weight as desired by remote control. Since it is possible to generate arbitrary complex vibrations by continuously changing the vibration while the horn is stopped or without stopping the machine while it is running, it is possible to obtain the most suitable vibration for the construction purpose and target ground, making it possible to improve efficiency,
Furthermore, it has the effect of minimizing ground vibration outside the construction area.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the principle of a compound vibration oscillator according to the present invention, Fig. 2 is a front view showing an embodiment of the present invention, Fig. 3 is a sectional view taken along line A-A in Fig. 2, and Fig. 4 is FIG. 3 is a view taken along arrow B, and FIG. 5 is a cross-sectional view taken along line c-c in FIG. 4.

Claims (3)

[Claims] (1) Four oscillation shafts each having an eccentric weight and each rotatably supported are arranged in the front-rear direction so that the axes of each pair are in the same direction and parallel to each other. One of the oscillation shafts is used as a drive shaft, and the oscillation shafts of the front and rear pairs are rotated in the same direction, and one of the front and rear pairs is rotated in the opposite direction. The oscillator is rotated and configured so that the rotational speed of each oscillation shaft is the same, and in addition to transmitting rotational force to the middle of the oscillation shaft, one side can be controlled by remote control while the oscillator is stopped or in operation. A horizontal compound vibration characterized in that a pair of oscillation shafts located on the diagonal of the oscillation shaft are rotated by a predetermined angle, and a power transmission part is interposed that can adjust the phase difference with respect to the pair of oscillation shafts located on the other diagonal. Oscillator. (2) The power transmission section includes gears respectively coupled to the drive shaft and the oscillation shaft located diagonally thereto,
It has a rotary housing rotatably supported, a planetary gear provided in the rotary housing, a rotating and a fixed sun gear, and a pair of oscillation shafts located on the other diagonal are rotated by the rotating sun gear. and a remotely controllable drive device is connected to the fixed sun gear to rotate the fixed sun gear and adjust the phase difference of the oscillation shaft. Horizontal compound vibration oscillator. (3) The horizontal type according to claim 2, wherein the drive device includes a sensor that detects the rotation, and controls the phase difference based on the detected value of the sensor. Complex vibration oscillator.