JPH076181Y2 - Pile driving machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a pile driving machine, and more specifically, a pile used for boundary territory, a cultivated plant in a field, for example, a pillar used for growing orchids, chrysanthemums, etc. The present invention relates to a portable pile driving machine in which a pile that is driven by being erected on the ground and used upright is driven by a mechanical power of a small engine to give a mechanical impact.

[Conventional technology]

For the purpose of preventing the escape of livestock in a grazing state by preventing the escape of livestock in a grazing state, and further preventing the lodging of growing plants, etc. Various piles are used, although there are differences in diameter and pile length.

This type of pile is erected by embedding the lower end of the pile in a hole that has been excavated in the ground in advance, or manually supporting the pile that has been erected in advance on the ground and using an impact force such as a hammer. It is erected by tapping work.

[Problems to be solved by the device]

As mentioned above, there is no suitable work machine for pile driving work in fields, ranches, pastures, etc., and the work of digging or driving must rely on the manual work of the worker. In the summer when the environment is bad, in places with poor scaffolding, and in very large places such as farm fields, especially in places where dozens or hundreds of piles are required for 10a, the work is heavy labor. Is.

Various pile driving machines have been developed and used for driving large piles for construction, but mainly for small piles,
At present, there is no work machine suitable for driving a pillar or the like for growing plants.

For this reason, the present invention proposes a pile driving method in which a relatively small pile or a pillar as described above can be easily driven by a mechanical force and can be driven to a desired place while preventing abnormal resonance and noise. The purpose is to provide a working machine.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention relates to a pile driving machine including a striking part, which is converted into reciprocating motion by a crank mechanism and is transmitted to a rotary output of an engine attached to a casing. An eccentric disk rotated by the engine output, a striking cylinder struck by the rotational movement of the eccentric disk, and a space for accommodating the striking cylinder are provided, and an outer periphery of the striking cylinder is formed of a cylindrical elastic material. A shock-absorbing cylinder that is loosely fitted in the space is fitted, the lower end of the shock-absorbing cylinder is supported by a stopper provided on the casing, and the upper end prevents unnecessary lowering of the striking cylinder. In addition, a donut-shaped resin material is loosely fitted and interposed between the upper end of the striking cylinder and the casing, and the striking cylinder and the casing are It is characterized in that it is configured so as to prevent abnormal resonance with the ring.

[Action]

The pile driving machine of this invention is the top end (pile head) of a temporarily installed pile.
After raising the work implement to the level once, open the throttle of the engine to increase the output and perform pile driving work. That is, when the impact cylinder is impacted by the rotation of the eccentric disc, the top end of the pile introduced into the impact cylinder is struck to perform the pile driving work.

If the impact cylinder receives an excessive impact from the eccentric disc during the pile driving work, the impact cylinder and the eccentric disc are largely separated from each other. Is alleviated.

Further, when carrying the pile driver, the impact cylinder is elastically supported by the buffer cylinder.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4 of the accompanying drawings. Symbols in these figures
10 is a small engine as a power source of a pile driving machine (hereinafter, simply referred to as a working machine), 20 is a striking portion of the small working machine, reference numeral 30 is a small engine 10 and a supporting portion that supports the striking portion 20, respectively. ing.

First, as the small engine 10 serving as a power source, a two-cycle gasoline engine used in a conventionally known portable working machine is used, and a clutch shoe is attached to a crankshaft 11 which is an output shaft.
12 is attached so that the rotational output can be led to the outside via the clutch drum 13.

This small engine 10 is equipped with a gasoline tank 14 on the bottom, a carburetor 15 on the side, and a recoil starter 16 on the side opposite to the output end of the crankshaft 11.

Further, the striking portion 20 has a power transmission mechanism 21 to be supplied with power, and the transmission mechanism 21 is housed in a casing 21A attached to both the small engine 10 and the support portion 30, and its input shaft 22 is the clutch. It is connected to the drum 13. The input shaft 22 is supported by a bearing 22A with respect to the casing 21A, and has a pinion gear 22X at its shaft end.
Meshes with the large gear 23X, and the output shaft 23 of this large gear 23X is supported by the casing 21A by a bearing 23A.

An eccentric disk 24 is provided at the shaft end of the output shaft 23, and a bearing 24A is fitted to this to form a vibrating portion.

Immediately below this vibrating portion, a cylindrical space 25 is formed near the lower part of the casing 21A, and a striking cylinder 26 is housed in this space 25. A stopper 21C protruding inward is formed in the casing 21A located at the lower end of the space 25, and a cylindrical buffer cylinder 27 whose one end is received by the stopper 21C surrounds the periphery of the impact cylinder 26. It is fitted in the state. The buffer cylinder 27 is made of a material such as nylon resin, which is highly elastic, resistant to abrasion, and excellent in strength against impact.

A flange 26A is provided on the outer circumference of the striking cylinder 26, and when a pile is introduced into the striking cylinder 26,
If a gap g is maintained between the upper end portion 27A of the buffer cylinder 27 and no pile is introduced, a flange is used.
26A comes into contact with the upper end of the buffer cylinder 27, and the impact cylinder 2
6 is prevented from unnecessarily descending, and at the time of driving the pile, the striking cylinder 26 suddenly moves downward due to the impact from the eccentric disc 24, but when the flange 26A hits the buffer cylinder 27, it is elastic. The direct repulsion due to is prevented from being applied to the striking cylinder 26, and a constant gap is provided between the bearing 24A and a thick portion 26X described later to suppress occurrence of abnormal vibration and noise.

When a conventional compression spring is used as the buffer cylinder 27, when the natural frequencies of the eccentric cam 24 and the compression spring are close to each other, the compression spring and the impact cylinder are
26 causes resonance due to its vertical movement, and
The acceleration was about 3 times, and strong vibration was applied to the hands of the workers. However, when a cylindrical buffer cylinder is used as in this invention, abnormal resonance is prevented. Further, in the conventional case, a metal noise is generated by hitting the flange portion 26A of the striking cylinder 26 and the compression spring, but this is not the case in the present invention.

Further, in the case of the buffer cylinder 27, since the contact is made over the entire circumference of the flange portion 26A of the striking cylinder 26, only compressive deformation occurs, and since the partial contact is not made like a helical compression spring, the compression spring tilts. As a result, the striking cylinder 26 partially receives a force other than in the vertical direction, and
There is no resistance to the up and down movement of.

The upper end portion 26B of the striking cylinder 26 is fitted to the cylinder portion 21B formed integrally with the casing 21A while allowing only vertical movement, and the upper end surface of the striking cylinder 26 has a thick portion 26X. The bearing 24A of the eccentric disc 24 is provided so as to be in contact with this. A doughnut-shaped resin material 28 similar to the buffer cylinder is loosely fitted around the thick portion 26X, and is attached.

The inside of the striking cylinder 26 is a space, and the lower end edge 26C is expanded in a tapered shape to facilitate the guiding of the pile and to stabilize the sitting when placed on the ground. In other words, a female screw portion 26Y is formed in the center portion inside the thick portion 26X. A bolt for fixing an adapter described later, which has versatility corresponding to the diameter and shape of the pile to be driven, is fastened to the female screw portion 26Y.

The taper-shaped expanded portion may be integrally provided on the casing 21A side.

Then, the support portion 30 is provided with a gate-shaped pipe material 31 as a whole, and has an upper end horizontal portion 31A and vertical portions 31B on both sides,
Anti-vibration rubber 32A for small engine 10 and casing 21A
It is attached to a bracket 32 that is fixedly mounted via.

Fixed grips 33 are attached to the lower ends of the vertical parts 31B on both sides so that they do not fall down by the stoppers 33A. Also, the vertical parts of the upper ends of the fixed grips 33 are fixed.
A stopper 34 is fixed to 31B. This stopper 34
The tubular base portion 32B of the bracket 32 is fixed to the upper side of the bracket 32, and the other end portion 3 extending from the vibration isolation rubber 32A of the bracket 32 is fixed.
A throttle lever 35 is pivotally attached to 2C, and an end of a throttle wire 35A connected to the carburetor 15 of the small engine 10 is connected to the throttle lever 35.

In addition, the pressing spring 3 is attached to the upper end of the base 32B of the bracket 32.
6 is provided, and the upper end portion of the pressing spring 36 is a flange portion 37A that receives the pipe material 37 fitted in the vertical portion 31B of the pipe material 31.
Against the free end of the throttle lever 35
35B extends to a region below the flange portion 37A, and its pressing spring 36
It is pushed by and urges the throttle in the closing direction.
A grip 37B is fitted on the outer periphery of the pipe material 37 with a soft rubber vibration feel, and one vertical portion 31B.
A fixed grip 37C is attached to the.

The adapter 40 is used when driving into a pile that does not fit in the inner space of the striking cylinder 26, or conversely, when the pile diameter is too small and the pile is in a slanting state in the inner space, when striking work. used.

That is, when using for a pile G1 larger than the internal space diameter of the striking cylinder 26, a large pile adapter 41 is used, and this adapter 41 is attached by screwing a bolt 42 into the female screw portion 26Y (see FIG. )). The head of the large pile G1 is housed in the internal space 43 of the large pile adapter 41.

Further, in the case of the pile G2 smaller than the inner space diameter of the striking cylinder 26, a small pile adapter 46 is prepared, housed in the inner space of the striking cylinder 26, and tightened with the female screw portion 26Y using the bolt 47. Wear (FIG. 4 (B)). By using this small pile adapter 46, a striking force can be applied along the axial direction of a relatively thin strut, and a reliable striking operation is possible.

In these figures, reference numeral 52 indicates a shoulder strap, and 51 indicates a pad that abuts on the waist when the shoulder strap is worn.

Next, a pile driving operation using the pile driving machine of the present invention will be described. First of all, prior to the pile driving work, the small engine 10 which is the power source is started to maintain the idling state,
The pile driving machine is lifted up to the level of the temporarily installed pile head. In order to increase the lifting stroke of the working machine, the lifting work is carried by supporting the fixed grips 33, 33 with both hands and lifting them, and the striking cylinder 26 of the striking part 20 is placed on the pile head.

Then, the pile driving machine itself is pressed against the temporary pile head by the worker's arm force. In this case, the grip 37B, 37C is pressed.
When holding the two grips 37B with both hands and pushing them down, the pipe material 37 to which the grips 37B are fitted moves along the pipe material 31 that constitutes the support part, and its flange The portion 37A is pulled down against the elasticity of the pressing spring 36.

When the flange portion 37A is pushed down together with the pipe material 37 by being pressed against the pile head of the pile driving machine, the flange portion 37A pushes down the free end 35B of the throttle lever 35 and pulls the throttle wire 35A. As a result, the rotation speed (output) of the small engine 10 increases and the clutch shoe of the crankshaft 11
The diameter of 12 is expanded and comes into contact with the clutch drum 13, and the output of the small engine 10 is transmitted to the input shaft 22 of the transmission mechanism 21. Further, the rotational torque is transmitted from the output shaft 23 to the eccentric disk 24 via the small gear 22X and the large gear 23X. Along with the eccentric disc 24, the bearing 24A fitted therein rotates to rotate the impact portion 2
The thick part 26X of the striking cylinder 26 that constitutes 0 is striking by giving striking vibration, the striking cylinder 26 is pushed down, and the piles contained in the striking cylinder 26 are driven into the ground. .

When the grip 33 or grips 37B, 37C are lifted at the place where the piles of a predetermined depth have been driven,
The tension applied to the throttle wire 35A is released, the engine is idling, and the reciprocating motion of the striking cylinder 26 is stopped.

The pile driver is a hammer cylinder 26 and a space 25 that houses it.
Since the buffer cylinder 27, not the compression spring, is located between and, the so-called dance phenomenon is prevented from occurring, abnormal vibration is prevented from occurring, and abnormal noise is also prevented from occurring.

If there is a large difference between the pile diameter to be piled and the inner diameter of the striking cylinder 26, the adapter 40 prepared in advance is used to drive the pile in a predetermined posture. That is, when the pile is larger than the striking cylinder 26, the large pile adapter 41 is attached to the female screw portion 26X of the striking cylinder 26.
Is fastened with bolts 42, and large pile G1 is
The head is housed and vibrated. In this case, the large pile adapter 41 also functions to increase the weight of the striking portion 20.

If the diameter of the pile is smaller than the inner diameter of the striking cylinder 26, the adapter 46 is fastened to the female screw portion 26Y with the bolt 47, and vibration striking is performed along the axial direction of the small pile G2. give.

[Effect of device]

As is clear from the above description, the pile driving machine of the present invention interposes not the compression spring but the buffer cylinder between the impact cylinder that directly impacts the pile and the space that accommodates the impact cylinder, Further, since the donut type resin material is loosely fitted and interposed between the upper end portion of the striking cylinder and the casing, the following effects are obtained.

(A). As in the case of using a conventional compression spring, vibration is not amplified by an impact applied to the striking cylinder and an abnormal resonance phenomenon does not occur, and the operator does not feel uncomfortable vibration.

(B). The generation of abnormal noise can be prevented.

(C). Since it does not incline and deform like a compression spring, resistance is not added to the impact action, and work can be performed efficiently.

[Brief description of drawings]

The attached drawings show an embodiment of the present invention. Fig. 1 is an overall oblique view of a pile driving machine, Fig. 2 is a vertical side view of the same, and Fig. 3 is a sectional view taken along line III-III in Fig. 1. , Fig. 4 (A), (B)
[Fig. 3] is an explanatory cross-sectional view of an adapter used according to the size of a pile. 10 …… Small engine 11 …… Crankshaft, 12 …… Clutch shoe, 13 …… Clutch drum, 14 …… Gasoline tank, 15 …… Carburettor, 16 …… Recoil starter 20 …… Striking part 21 …… Transmission mechanism, 21A …… Casing, 21B …… Cylinder part, 22 …… Input shaft, 21C …… Stopper, 22A …… Bearing, 22X …… Smear gear, 22Y …… Large gear, 23 …… Output shaft, 23
A …… Bearing, 24 …… Eccentric disk, 25 …… Space, 2
6 …… Strike cylinder, 26A …… Flange, 26B …… Top end, 26C …… Bottom edge, 26X …… Thick part, 26Y …… Female screw part, 27 …… Buffer cylinder, 27A …… Top end, 28… … Resin material 30… Supporting part 31… Pipe material, 31A… Horizontal upper part, 31B… Vertical part,
32 …… Bracket, 32A …… Vibration proof rubber, 32B …… Base, 33
...... Fixed grip, 33A ...... Stopper, 34 …… Stopper, 35 …… Throttle lever, 35A …… Throttle wire, 35B …… Free end, 36 …… Press spring, 37 …… Pipe material, 3
7A …… Flange part, 37 …… Grip 40 …… Adapter 41 …… Large pile adapter, 42 …… Bolt, 43 …… Internal space, 46 …… Small pile adapter, 47 …… Bolt 51 …… Shoulder strap , 52 …… Pat.

Claims (1)

[Scope of utility model registration request] 1. A pile driving machine having a striking part for transmitting a rotation output of an engine mounted on a casing by converting it into a reciprocating motion by a crank mechanism, wherein the striking part is an eccentric disc rotated by an engine output. The impact cylinder is struck by the rotational movement of the eccentric disc, and the space for accommodating the impact cylinder is provided. The impact cylinder is formed on the outer periphery of the impact cylinder by a cylindrical elastic material, and is movable in the space. A buffer cylinder to be loosely fitted is fitted, the lower end of the buffer cylinder is supported by a stopper provided on the casing, and the upper end of the buffer cylinder prevents unnecessary lowering of the striking cylinder, and the upper end of the striking cylinder. To prevent abnormal resonance between the impact cylinder and the casing, insert a donut-shaped resin material into the casing by loosely fitting it. A pile driving machine characterized by being configured as.