JPH10266205A - Hammering machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold an object of various diameters so as to be aligned in a proper position with regard to the hammering body which is provided to a hammering machine. SOLUTION: A hammering machine 1 is provided with a hammering body 43 which reciprocates in a housing by the rotating output from a power source, and a hammering mechanism 4 by which an object 5 is hammered by means of the hammering body 43. In that case, a guide member 48 is fitted to the end part of the hammering mechanism 4 for positionedly holding the end part of the object 5, and a centering means is provided for inwardly pressing the object 5 with regard to the guide member 48 so as to position it in the center of the guide member 48. Preferably, the centering member is constituted so that the object 5 is inwardly and pressedly held by the elastic restoring force of a plurality of plate springs 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hitting machine for use in a pile driving operation or the like, and more particularly to a technique capable of appropriately applying a striking force from a hitting machine to an object.

[0002]

2. Description of the Related Art A hitting machine conventionally used for a pile driving operation has a power source such as an engine, and has a hitting mechanism for hitting the tip of an object such as a pile by the rotation output of the power source. ing. Normally, the hitting mechanism has a striking body that can reciprocate relatively to the striking mechanism, and strikes an object in a state where the striking body is relatively farthest from the striking mechanism. It is configured as follows.

[0003] At the tip of the hitting mechanism, the hitting working body and the object are held in a state where they are aligned with each other.
In order to satisfactorily apply the hitting force from the hitting mechanism to the target, a cylindrical guide member is provided.

[0004]

However, the above-mentioned guide member is formed by a cylindrical body having a relatively large diameter so as to hold objects corresponding to various diameters such as pipe materials and logs. Have been. For this reason, when holding a small-diameter pipe material or the like, play occurs in a direction intersecting the axis of the pipe material, and it is difficult to position the pipe material with respect to the striker. Also,
Even if the alignment is satisfactorily performed, a displacement occurs between the striker and the pipe member due to vibration or the like caused by the striker strikes the pipe member. Such a problem is remarkable during a pile driving operation in which the pile is driven at an angle to the ground.

[0005] Further, if the striking operation is performed in a state where the axes of the striking body and the object to be struck are not coincident with each other, the striking position is deviated from the axis of the object. The hitting force originally given by the work body is not sufficiently given to the target. That is, problems such as taking a long time for the pile driving work and driving the pile obliquely with respect to the ground occur.

SUMMARY OF THE INVENTION The present invention has been made under the above-mentioned circumstances, and it is an object of the present invention to satisfactorily align and hold objects having various diameters with a striker provided in a striker. Is to be able to do this.

[0007]

DISCLOSURE OF THE INVENTION In order to solve the above problems, the present invention employs the following technical means.

That is, according to the invention of the present application, a striking working machine having a striking body for reciprocating with respect to a housing by a rotational output from a power source and a striking mechanism for striking an object with the striking body. And
A tubular guide member for positioning and holding the end of the target object is attached to the tip of the hitting mechanism, and this guide member presses the target object inward and moves it to the center of the guide member. A hitting machine is provided, comprising a centering means for positioning and holding.

Preferably, the centering means is configured to press and hold the object inward by the elastic restoring force of the plurality of leaf springs.

Preferably, one end of each of the leaf springs is fixed to the inner surface of the guide member so as to approach each other from one end to the other end. The object is pressed and held by the restoring force.

Preferably, each of the leaf springs has one end fixed to the inner surface of the guide member, the other end being a free end, and a central portion projecting inward of the guide member. The object is pressed and held by the elastic restoring force of the central portion.

In the hitting machine having the above construction, since the guide member is provided with the centering means for positioning and holding the object at the center of the guide member, only the object is accommodated inside the guide member. Thus, it is possible to easily hold the hitting work body and the object in alignment with each other.

[0013] In the hitting machine having the above structure,
Since the end of the object to be hit by the leaf spring of the guide member is pressed and held in the guide member, even if the diameter of the object is smaller than the guide member, the axis of the object is The shift in the direction crossing the mind is limited. Therefore, there is no displacement between the hitting working body and the pipe material due to vibration or the like caused by the hitting body hitting a small-diameter pipe material. Needless to say, such an effect can also be enjoyed in a pile driving operation in which a pile or the like is driven obliquely to the ground.

Further, since the hitting operation can always be performed in a state where the axes of the hitting body and the object to be hit coincide with each other, the hitting force to be originally given from the hitting body is sufficiently high for the object. , So that the performance of the hitting machine can be sufficiently exhibited. That is, it is possible to solve the problem that the pile driving work takes time and the pile is driven obliquely with respect to the ground.

[0015] Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

FIG. 1 is an overall view of a striking machine according to the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. 3 is a sectional view taken along the line III-III of FIG. FIG.
FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, and FIG. 5 is a view showing a state in which the hitting machine 1 is used for a pile driving operation.

As shown in FIGS. 1, 2 and 3, the striking machine 1 includes an engine 2 and a cylinder in which a transmission shaft 30 for transmitting the rotation output from the engine 2 is inserted. A cylindrical body 3 and a striking mechanism 4 provided on the distal end side of the cylindrical body 3 for striking the object 5 in the base end side direction of the cylindrical body 3 by the rotation output from the engine 2. It is configured.

As best shown in FIG. 1, a grip portion 32 is provided at an appropriate portion of the tubular body 3, and is transmitted from the engine 2 in proximity to the grip portion 32. An operation unit 33 for controlling the rotation output is provided. Therefore, the hitting work machine 1 is configured such that the operator
By operating the operation unit 33 while gripping the, the work can be performed while adjusting the rotation output transmitted to the hitting mechanism 4. Convenience to sex is achieved.

As shown in FIGS. 2 and 3, the hitting mechanism 4 includes a rotating body 41 which is driven to rotate inside a housing 40 by a rotation output from the engine 2, and a rotating body 4.
And a striking body 43 held at a position on the base end side of the tubular body 3 in the housing 40 such that the striking body 42 is reciprocally movable toward the distal end side and the base end side.
And is provided. 1, the hitting mechanism 4 is provided at a position offset from the axial direction of the cylindrical body 3, and the offset amount is determined from the axial center of the cylindrical body 3. The distance is set substantially corresponding to the distance of the hitting mechanism 4 to the side end of the engine 2 in the offset direction. That is, the direction of the axis of the cylindrical body 3 and the direction of the striking force applied from the striking body 43 are substantially parallel to each other, and the striking force is in the direction of the base end of the cylindrical body 3. It is configured to be provided.

As shown in FIGS. 2 and 3, the rotating body 41 is integrated by a connecting portion 41b having a function of a balance weight between a pair of oblong flange portions 41a, 41a arranged at a predetermined distance from each other. Formed. Rotation support shafts 44a, 44b project from the outer surfaces of the flange portions 41a, 41a on the same axis. One rotation support shaft 44b is rotatably supported via a bearing 45a, and the other rotation support shaft 44a is rotatably supported via bearings 45b and 45c. One end of the rotation support shaft 44a has a bevel gear 44A is attached. That is, the rotation output from the engine 2 is transmitted to the distal end side of the tubular body 3 via the transmission shaft 30, and the bevel gear 31 and the bevel gear 44A attached to the distal end of the transmission shaft 30 The rotation output is transmitted in a direction perpendicular to the cylindrical body 3 by the meshing of the rotary members, and the rotary body 41 is rotationally driven by the rotation output.

As shown in FIG. 2, each of the flange portions 41
The holding holes 46 and 46 are formed in the a and 41a on the opposite side of the connecting portion 41b with respect to the rotation axis of the rotating body 41. As shown in FIG. Both ends of a cylindrical hitting body 42 are play-held at 46, 46. The striking body 42 is rotatable in a state in which both ends are restrained by the holding holes 46, 46, and at the same time, can move in a direction perpendicular to the axis as long as a gap between the inside of the holding holes 46, 46 allows. It has been.

As shown in FIGS. 2 and 3, a cylindrical sleeve 47 is held at the base end of the housing 40.
3 are fitted and held so as to be able to reciprocate in the axial direction. The striking body 43 has a flat top surface 43b and a buffer hole 43c having a predetermined depth and opening in the top surface 43b.
Are formed. Further, a large-diameter flange portion 43a is formed integrally with the hitting operation body 43, and the large-diameter flange portion 43a abuts on the base end portion of the housing 40 to restrict the movement to the distal end side. It is supposed to be.

As shown in FIGS. 1, 2 and 3, a cylindrical guide member 48 is connected to the base end of the housing 40 coaxially with the striker 43. On the inner surface of the guide member 48, one ends of a plurality of leaf springs 6 formed of metal or the like and arranged at substantially equal intervals are connected by rivets 7, and these leaf springs 6 are connected to the guide member. It constitutes a centering means for centering the hitting object 5 inserted in the inside 48.

As shown in FIGS. 2 and 3, each of the leaf springs 6 has a bent portion near one end connected to the inner surface near the entrance of the guide member 48. Part, that is, the guide member 4
The leaf springs 6 are closer to each other as they go further toward the inside of the plate 8. That is, as shown in FIGS. 1, 2 and 3, when a pile 5 having a diameter larger than the interval between the other ends of the leaf springs 6 is accommodated in the guide member 48, the leaf springs 6 And the pile 5 is pressed inward of the guide member 48 by the elastic restoring force of each leaf spring 6. At this time, since the pressing force of each of the leaf springs 6 is substantially the same, the pile 5 is held at the center of the guide member 48.

Therefore, in the striking machine 1 having the above configuration, the tip of the pile 5 is aligned with the striking body 43 only by inserting the pile 5 into the guide member 48. Also, at the time of pile driving operation or the like, the tip of the pile 5 held by the guide member 48 is attached to the hitting work body 4.
3 can be maintained in a good condition.

In the striking machine 1 having the above-described structure, the object 5 to be struck is pressed and held inward by the leaf spring 6, so that the diameter of the object 5 is smaller than that of the guide member 48. Even in this case, the deviation of the object 5 in the direction intersecting with the axis is restricted. Therefore, there is no displacement between the hitting work body 43 and the target object 5 due to vibration or the like caused by the hitting work body 43 hitting the target object 5. Needless to say, such an effect can be enjoyed also in a pile driving operation in which the pile is driven at an angle to the ground.

Further, since the striking operation can always be performed with the axis of the striking work 43 and the object 5 to be struck coincident with each other, the striking force to be originally applied from the striking work 43 is sufficient. And the performance of the hitting machine 1 can be sufficiently exhibited. That is, it is possible to solve the problem that the pile driving work takes time and the pile is driven obliquely with respect to the ground.

As shown in FIG. 5, the striking machine 1 having the above-described configuration allows the worker to grasp the grip portion 32 and to temporarily hold the pile temporarily held on the ground inside the guide member 48. Holding the tip of the object 5 such as
3 is used by operating.

By operating the operation section 33, the rotation output of the engine 2 is transmitted to the rotating body 41 via the transmission shaft 30 when the rotation speed of the engine 2 reaches a predetermined rotation speed or more. The rotating body 41 is driven to rotate.
Due to the rotation of the rotating body 41, the hitting body 42 collides with the top surface of the hitting work body 43, and the hitting force is generated by the collision and the centrifugal force of the hitting body 42 caused by the rotation of the rotating body 41. The working body 43 is configured such that a striking force is repeatedly applied to the base end side of the tubular body 3 so as to be continuously applied.

In the hitting machine 1 according to the present embodiment, since the direction in which the hitting force is applied is on the base end side of the cylindrical body 3, the hitting machine 1 hits an object such as a pile 5 higher than the height of the worker. The guide member 48 and the object 5
And the hitting operation can be easily performed.

Note that the hitting mechanism is not limited to the mechanism described in the above embodiment, but may employ another mechanism. For example, a rotating body that is driven to rotate inside the housing by the rotation output of the engine, a piston that is reciprocally connected to the rotating body via a connecting rod, and an upper part that is open and has the above-described interior. A piston slidably held therein, and a cylinder slidably held inside a tubular mantle connected to the housing, wherein the piston is driven by rotation of the rotating body. A mechanism having a mechanism configured to reciprocate the cylinder with the reciprocating movement of the cylinder can be adopted, and a hitting working machine including a hitting mechanism having such a configuration is also applicable to the present invention. Needless to say.

Further, as the guide member 48, one shown in FIG. 6 can be employed. The basic configuration of the guide member 48 is substantially the same as that of the above-described guide member 48, except that the center of each leaf spring 60 as a centering means projects inward from the guide member 48. Also in this guide member 48, the target object 5 is configured to be pressed and held by the elastic restoring force of each leaf spring 60, and it goes without saying that the effect of the guide member 48 described above can be enjoyed.

Further, the hitting machine 1 may have a structure in which the engine 2 is supported by a shoulder frame mounted on the body.

The number of leaf springs 6 connected to the inner surface of the guide member 48 is not limited to the number shown in the drawings referred to for describing the present embodiment, and various design changes can be made. In addition, the connecting means is not limited to the rivet, and it goes without saying that means such as spot welding may be used.

In addition, as the centering means,
In short, any configuration may be provided as long as it has a function of positioning the object to be hit having various diameters at the center of the guide member 48.

[Brief description of the drawings]

FIG. 1 is an overall view showing an example of a hitting machine according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

FIG. 5 is a diagram illustrating a use state of the hitting machine.

FIG. 6 is a sectional view illustrating a modification of the guide member.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 hitting machine 2 engine (as power source) 4 hitting mechanism 5 target (pile) 6 leaf spring 40 housing 43 hitting working body 48 guide member

Claims (4)

[Claims] 1. A striking body that reciprocates with respect to a housing by a rotational output from a power source,
A hitting machine including a hitting mechanism for hitting an object by the hitting body, wherein a tip end of the hitting mechanism is provided with a cylindrical guide member for positioning and holding an end of the object. The hitting machine is characterized in that the guide member includes a centering means for pressing an object inward and positioning the object at the center of the guide member. 2. The hitting machine according to claim 1, wherein the centering means is configured to press and hold the object inward by the elastic restoring force of the plurality of leaf springs. 3. One end of each of the leaf springs is fixed to the inner surface of the guide member so as to be closer to each other from one end to the other end, and the elastic restoring force of the other end which is a free end. 3. The hitting machine according to claim 2, wherein the object is pressed and held by the apparatus. 4. Each of the leaf springs has one end fixed to the inner surface of the guide member, the other end being a free end, and a central portion protruding inward of the guide member. The hitting machine according to claim 2, wherein the object is pressed and held by the elastic restoring force of the central portion.