JPH076187Y2 - Vibrating pile driver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a vibrating pile driver applied to driving or pulling out a pile while vibrating the pile, and more specifically, to a vibrating machine. The weight attached to the vibrator holder is divided into a plurality of pieces, and each of the divided weights can be freely combined with the vibrator holder through an insertion pin inserted from the outside. Further, the present invention relates to a vibrating pile driving machine that can be integrally and integrally connected to each other, thereby making it possible to increase / decrease the weight of the weight particularly at the time of driving the pile very easily and instantaneously.

(Prior Art) Conventionally, as a vibrating pile driver that can be adjusted to increase or decrease the weight of the weight as described above, that is, to increase or decrease the mass of the weight,
For example, those described in JP-A-56-59918 and JP-A-48
There are those described in the −40212 publication.

That is, the vibration pile driver disclosed in the former publication has a mechanical vibration generator that generates relative mechanical vibration in the vertical direction between the output member and the reaction member, and an output member of the mechanical vibration generator. It is composed of the procedure for connecting to the provided pile and the inertia weight attached to the reaction member via the spring means. Moreover, the inertia is obtained by attaching an additional weight to the inertia weight or removing the additional weight. By making it possible to adjust the mass of the weight, the vibration amplitude of the reaction force member can be extremely effectively reduced, and most of the vibration amplitude generated by the mechanical vibration generator can be output by the output member and the connecting means. It is possible to concentrate on the pile via the crane, and by suspending and supporting the reaction force member with a crane, etc., it is possible to prevent the vibration of the mechanical vibration generator from being transmitted to the crane during pile driving work. Etc. can extend the life of Further, the vibration pile driver disclosed in the latter publication is equipped with an additional weight through a shock-absorbing spring in the exciter, and has a two-degree-of-freedom vibration system including an additional weight system and an exciter system. By configuring it and making the swing of the additional weight to be minute, it is possible to make the vibration transmitted to the crane and the fluctuation of the acting force to be minute, and to prevent damage due to vibration via the exciter system of the crane used. At the same time, it can help prevent noise.

(Problems to be Solved by the Invention) However, the above-mentioned former and those disclosed in the latter gazette have various problems as described below in actual use.

That is, in any of the above cases, the vibrating pile driving machines disclosed in the former and the latter publications increase or decrease the mass of the weight provided in the vibrating pile driving machine suspended by a crane or the like. The vibration generated by the machine can be prevented from being directly transmitted to the crane, etc. to prevent damage to the crane, etc., and at the same time to prevent noise and extend the life of the crane, etc., and also increase or decrease the weight of the weight. Although it is possible to adjust the driving force of the pile by doing so, anyway, when increasing or decreasing the weight of the weight used in the former vibrating pile driving machine,
Not only is it necessary to remove the weight from the reaction member and attach a separate weight, but depending on the size of the weight, it is also necessary to replace the wire or the like that is suspended from the suspension support fitting.

Further, even when the weight of the weight used in the latter vibrating pile driving machine is increased or decreased, it was attached to the weight by inserting it into a guide plate that suspends the vibration generator through the suspension element strips. It is necessary to remove the guide shaft from the weight and then attach the weight separately from the weight removed as described above.

Therefore, in each of the former and latter cases, completely different weights are required, but since the weight itself is very heavy for each weight, the weight itself There have been various serious problems that the replacement work is very complicated and the replacement time is long.

However, the present invention solves all of the above problems, and even when the weight of the weight is increased or decreased, it is possible to instantly and easily perform the work of increasing or decreasing the weight of the weight. It is an object to provide a vibrating pile driver.

(Means for Solving Problems) In order to solve various problems in the actual use of the former and the latter, the present invention devises a completely new vibrating pile driver and takes the following means. Is.

That is, the present invention relates to a vibrating machine 1 capable of vertically vibrating the vibrating pile 6 and a vibrating machine holder for holding the vibrating machine 1.
In addition, in a vibrating pile driving machine that is provided with 14 and that can adjust the driving force of the pile 6 by increasing or decreasing the weight of the weight 17, the vibrating machine holder 14 and the vibrating machine 1 A damping device 8 for damping the vertical vibration of the vibration exciter 1 is provided therebetween, and the weight 17 is detachably attached to the vibrating machine holder 14, and the weight 17 is attached. 17 is divided into a plurality of parts, and is formed so as to be connectable in a stacked state via the convex fitting part 19 and the concave outer fitting parts 16 and 24 which are provided to each other. Through-holes 22 ..., 22a ..., 22a ..., 22a ..., 22a ... 14a ... are provided respectively.

(Operation) That is, in the vibrating pile driver according to the present invention, the shock absorber 8 for damping the vertical vibration of the exciter 1 is provided between the exciter holder 14 and the exciter 1. Further, the weight 17 is detachably attached to the exciter holder 14.
Moreover, the weight 17 is divided into a plurality of parts, and is formed so as to be connectable in a stacked state through the convex fitting parts 19 and the concave outer fitting parts 16, 24 which are provided to each other. Each of the divided weights 17a, 17b ... And the vibrator holder 14
The through-hole 22 that allows the respective pins to be combined and integrally connected by inserting the insertion pin 20 from the outside.
.., 22a .., 14a .. are provided respectively, so not only can the weights of the divided divided weights 17a, 17b .. ,
Each of the divided weights 17a, 17b, ... and the vibrating body holder 14 that are instantly and reliably divided by simply inserting and removing the insertion pin 20 without performing any other work such as removal and attachment of other parts. Can be attached and removed freely.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes an exciter that causes a pair of eccentric weights 2, 2 to rotate in opposition to each other about a shaft 4, 4 by a driving force of an electric motor 3 to generate vertical vibration. A chucking device 5 is attached to the lower portion of the vibration exciter 1, and includes a chuck 7 that can be opened and closed for holding and fixing the pile 6.

Numerals 8 and 8 are shock absorbers provided on both sides of the vibrator 1, and a rod 10 is passed through a fixing plate 9 on the side of the vibrator 1, and a seat plate 11 and a fixing plate under the rod 10 are fixed. A vibration coil 1 and a chucking device 5 are supported in a buffered state by interposing a compression coil spring 12 between the fixed plate 9 and the fixed plate 9 as well as the following vibration. A coil spring (13) that is compressed between the machine holder (14) and the machine holder (14) is provided.

Reference numeral 14 is a vibrating machine holder in which the upper ends of the rods 10 of the shock absorbers 8 and 8 are fixedly supported by nuts or the like, and a hanging rod 15 for hooking to the hook 23 of the crane is provided on the upper part thereof. Moreover, concave outer fitting portions 16 are formed on the upper surface portions on both sides of the suspension rod 15.

17 indicates a weight composed of a plurality of divided weights 17a and 17b, and the divided weights 17a and 17b are metal block-shaped weights of iron or the like having a suspension rod 18 on the upper part thereof, for example, several Each is configured to have a weight of about 100 kg. 22 ..., 22a ... are through holes formed in the upper and lower positions of the front and rear wall portions of the respective divided weights 17, 17a, and the through holes 22 on the upper side of one of the divided weights 17a have the other divided weights 17b. The lower through holes 22a are aligned with each other and the insertion pins are inserted to freely connect the both in a stacked state.

Reference numeral 14a denotes a through hole provided in the vibrator holder 14 and facing each of the through holes 22a on the lower side of the divided weight 17a. Explaining further one divided weight 17a, the divided weight 17a has a convex fitting portion 19 formed in the lower portion as shown in FIG. 2B, a concave outer fitting portion on the upper surface side of the vibrator holder 14. It is fitted in 16 and is fixed by a plurality of removable insertion pins 20 and is connected to the vibrator holder 14. 21 is the divided weight
A recess formed in the center of the bottom of the divided weight 17a to avoid contact between the bottom surface of the 17a and the suspension rod 15 of the vibrator holder 14, and 24 is a convex fitting portion at the bottom of the other divided weight 17b. The concave outer fitting portion formed on the upper surface of the divided weight 17a so that the weight 19 can be fitted is shown. The other divided weights 17b are also formed in the same structure as the divided weights 17a. Reference numeral 25 denotes a non-vibrating portion composed of the vibrator holder 14 and the weight 17a located above the shock absorbers 8.

The present embodiment has the above-mentioned structure. Next, its use example and operation will be described.

First, at the time of driving the pile 6, as shown in FIG. 1, the divided weight 17a is integrally connected to the upper part of the vibrating machine holder 14, and the suspension rod 18 of the divided weight 17a is hooked on the crane. In the state of being suspended by 23, the exciter 1 is operated to give vibration to the pile 6. The pile 6 vibrates at a desired amplitude, frequency, etc. by the vibration force generated by the rotation of the eccentric weights 2, 2 of the vibration exciter 1, thereby vibrating the soil into which the pile 6 is driven and fluidizing it. It is driven by reducing the resistance of the soil when driving into the pile.

The values such as the vibration acceleration of the pile in the work are expressed as follows.

・ Frequency n: Corresponding to the rotation speed of the eccentric weight [cpm] ・ Exciting force P (centrifugal force generated by the rotation of the eccentric weight 2,
That is, the force to continue the vertical vibration of the pile 6) P = Kω ² / g [kg] K: Eccentric moment of the eccentric weight [kg ・ cm] ω: Rotational angular velocity of the eccentric weight [rad / sec] g : Weight acceleration [980cm / sec ² ] ・ Amplitude a = K / W [cm] W: Total weight of vibrating parts such as exciter 1 and chucking device 5 [kg] ・ Vibration acceleration α = aω ² [cm / s ² ] a: Amplitude [cm] ω: Rotational angular velocity of eccentric weight [rad / sec] By the way, the effective force for actually driving the pile 6 into the soil,
That is, the force for pushing the pile 6 downward is the total weight of the pile driver except the above-mentioned vibration force P. However, since the weight 17 is attached to the hanger 14, the weight 17a is divided. Therefore, the driving force of the pile 6 is increased as compared with the case where the weight 17 is not provided by the increased weight.

The vibrating machine holder 14 and the divided weights 17a attached to the vibrating machine holder 14 are located above the vibrating machine 1 which vibrates up and down via the shock absorbers 8,8, so that the pile 6 vibrates upward. Does not disturb anything. That is, the weight of the vibrating body holder 14 and the divided weight 17a always acts downward as a driving force for the pile 6 via the shock absorbers 8 and 8 and the vibrating machine 1, but when the vibrating machine 1 rises. Since the ascending force of the vibration generator 1 is buffered by the shock absorbers 8,8, the weight of the non-vibrating portion 25 causes a downward force repulsive to the ascending force to directly act on the vibration generator 1 and the like. There is nothing.

Further, the amplitude a (= K / W) is increased / decreased by adjusting the vibration weight W. However, even if the weight W of the vibrating portion is not changed and the weight of the non-vibrating portion 25 is increased as described above, the amplitude There is no change in the value of a. Furthermore, the vibration acceleration α (= aω ² )
Does not cause a change.

When the weight of the entire pile driver is increased by mounting the divided weights 17a to the vibrator support 14, the various conditions such as the vibration acceleration of the pile 6 that are optimally set in advance according to the soil conditions are deteriorated. Without driving, the driving force of the pile 6 can be increased in a state in which the pile 6 is optimally vibrated.

Further, the driving force of the pile 6 can be further increased by appropriately adding and installing another divided weight 17b separately prepared in addition to the divided weight 17a, which further shortens the time for driving the pile 6. It will be possible. The specific number of the divided weights 17a and 17b may be determined in consideration of the allowable hanging weight of the crane and the like.

Further, the divided weight 17a is attached to the vibrator support 14 by inserting the insertion pin 2
Since they are connected by 0, the split weight 17a can be easily removed from the vibrator holder 14 by pulling out the insertion pin 20, and the split weights 17a and 17b are also split weights. 17a
It can be easily attached and detached by using the insertion pin 20 as in the connection structure between the vibration exciter holder 14 and. Therefore, when the pile driver is transported, the divided weight 17a can be removed in a lightweight state with the exciter holder 14 removed, which is convenient for handling.

(Effect of the Invention) As described above, according to the present invention, a shock absorber for buffering the vertical vibration of the exciter is provided between the exciter holder and the exciter. The weight is detachably attached to the holding body, and the weight is divided into a plurality of pieces.
In addition, it is formed so as to be connectable in a stacked state via the convex fitting portion and the concave outer fitting portion provided to each other, and the divided weights and the vibrating body holder are different from each other. Since the through-holes are provided so that they can be combined and integrally connected by inserting the insertion pins from the outside, the individual weights of the divided divided weights have relatively good workability. Not only the weight and size can be set, but also by simply inserting and removing the insertion pin without performing other parts such as removal and installation work, each of the divided weights can be divided instantly and reliably. The exciter holder can be freely attached and detached.

Therefore, even when the weight of the weight is increased or decreased, it is possible to increase or decrease the weight of the weight instantly and easily. Further, in the vibrating pile driver according to the present invention, in order to increase the weight of the non-vibrating portion above the shock absorber, the shaker holder above the shock absorber for damping the vibration generated by the shaker increases. Since the weight of the pile is detachably provided, the pile driving force can be increased by the weight increased by the weight and the penetration speed of the pile can be increased. Increasing the weight of the vibrating portion does not hinder the process of raising the vibration of the exciter or the pile, and does not unduly change the predetermined amplitude of the vibration of the pile or the value of the vibration acceleration.

As a result, according to the present invention, the driving force of the pile can be increased without unduly changing the vibration condition of the pile set to the optimum condition for soil quality, etc. It has a special effect that the time can be drastically shortened.

Moreover, since the present invention uses the divided weights that can be connected in a stacked state with each other, the weight of the non-vibrating part is optimized to the working condition by appropriately changing the number of the divided weights according to the working condition. In addition to performing appropriate pile driving work in accordance with various conditions, the weight can be attached to and detached from the vibrating machine holder, so the weight can be removed during transportation to reduce the weight of the weight. We have achieved the real benefit of being easy to handle.

[Brief description of drawings]

FIG. 1 shows an embodiment of a pile driver according to the present invention. FIG. 1 (a) is a partially cutaway sectional front view, and FIG. 1 (b) is same figure (a).
XX line principal part sectional drawing of. 1 ... Vibrator, 6 ... Pile, 8 ... Shock absorber, 14 ... Vibrator holder, 14a ... Penetration hole of vibrator holder, 17 ... Weight, 1
7a, 17b …… Divided weight, 25 …… Non-vibrating part

Claims (1)

[Scope of utility model registration request] 1. A vibrating machine 1 capable of vertically vibrating to generate vibrations on a pile 6, and a vibrating machine holder 14 for holding the vibrating machine 1.
And a vibration pile driving machine capable of adjusting the driving force of the pile 6 by increasing / decreasing the weight of the weight 17, between the vibrating machine holder 14 and the vibrating machine 1. Is provided with a shock absorber 8 for absorbing the vertical vibration of the vibration exciter 1, and the weight 17 is detachably attached to the vibrator holder 14. Are divided into a plurality of parts, and are formed so as to be connectable in a stacked state through mutually provided convex fitting parts 19 ... And concave outer fitting parts 16, 24. Each of the 17a, 17b ... And the vibrating body holder 14 has a through hole which allows the insertion pins 20 to be inserted from the outside so that they can be combined and integrally connected.
A vibrating pile driver, characterized in that 22 ..., 22a ..., 14a ... are provided respectively.