JP5555130B2 - Excavation method and excavation device for foundation hole of simple building - Google Patents

Description

  The present invention relates to a drilling method and a drilling device for a foundation hole used when constructing a foundation for a simple building in the ground, such as a concrete foundation such as a carport.

  In a carport constructed in a general house or the like, it is necessary to construct a concrete foundation as shown in Patent Document 1, for example, in order to support the column. The concrete foundation is constructed by first excavating a hole for the foundation and then placing the concrete. In the case of excavating such a basic hole, conventionally, a quadrangular hole is generally excavated by a general-purpose excavator such as a hydraulic excavator or the like as described in Patent Document 2. However, in the case of human power, labor and time are required. In addition, general-purpose excavators such as hydraulic excavators are difficult to work in a small site.

  On the other hand, as a method of excavating a hole for a foundation in a small site, a portable auger excavator that uses a portable generator driven by a small engine and has an electric motor driven by the electric power generated by the generator Drilling is performed using In this case, in order to receive the excavation reaction force by the screw auger, the generator and the excavator are connected by a rod, the operator has a handle provided at the top of the excavator, and the excavator's rotational reaction force is The excavation work for the foundation hole is carried out by receiving the weight of the generator through

  However, when excavating the hole for the foundation using an engine-driven generator, the noise from the engine disturbs the neighborhood. In addition, contractors need to have an engine-driven portable generator. In order to eliminate the need for such a portable power generator, it has been conventionally practiced to excavate a foundation hole by a hand-held excavator driven by an electric motor using a commercial power source drawn into the home.

JP 2010-116754 A Japanese Patent Laid-Open No. 10-25767

  However, in the case of a hand-held excavator driven by an electric motor using a commercial power source, since it does not have an engine-driven generator, there is no means for receiving a rotational reaction force, and an operator holds a handle to generate a rotational reaction force. have to receive. However, the fact is that this rotation reaction force cannot be received by one worker, and two workers are required. For this reason, labor saving is impossible.

  On the other hand, when excavating the foundation hole with a hand-held excavator driven by an electric motor using a commercial power supply, work is performed by installing an electric motor on the mounting base that receives the rotational reaction force during excavation in order to save labor. Things are also done. However, when the installation base is installed, the equipment becomes large, and the purchase cost of the installation base becomes high for the contractor who performs the excavation work, so that an economic burden is imposed, and in addition, the transportation of the installation base to the work site and the installation work are also required. This requires a labor and labor for this purpose, and also has a problem that the storage space for the entire excavator is widened.

  In view of the above-mentioned problems, the present invention makes it easy for one person to easily perform foundations by a relatively simple apparatus configuration when excavating a hole for a foundation for a simple building using an electric motor-driven hand-held small excavator using a commercial power source. An object of the present invention is to provide a drilling method and a drilling device that enable excavation of a drill hole and reduce an economic burden on a contractor.

The method for excavating a foundation hole of a simple building according to claim 1 is:
An anchor that is driven into the ground and a hand-held excavator having an electric motor driven screw auger that uses a commercial power source are connected by a telescopic rod,
In the state where the anchor is driven into the ground and the telescopic rod is inclined, an operator holds the handle of the excavator and rotates the screw auger of the excavator with the electric motor to excavate the ground.
While lowering the excavator due to the progress of the excavation and lowering the telescopic rod while contracting,
A foundation hole is excavated in the ground while receiving the rotational reaction force of the screw auger on the ground via the telescopic rod and the anchor.

The method for excavating the foundation hole of the simple building according to claim 2 is:
An anchor that mounts a weight and fixes it to the ground, and a hand-held excavator having an electric motor driven screw auger using a commercial power source are connected by an extendable rod,
With the weight placed on the anchor provided on the ground and with the telescopic rod inclined, an operator holds the excavator handle and rotates the screw auger of the excavator with the electric motor . Drilling,
While lowering the excavator due to the progress of the excavation and lowering the telescopic rod while contracting,
A foundation hole is excavated in the ground while the rotational reaction force of the screw auger is received by the weight via the telescopic rod and anchor.

A drilling device for a basic hole of a simple building according to claim 3,
An anchor that can be driven into the ground,
A hand-held excavator having an electric motor driven screw auger using commercial power;
A telescopic rod that connects the excavator and the anchor and lowers the excavator while the excavator descends with the progress of excavation by the excavator ;
A universal joint is provided between the anchor and the telescopic rod, and allows the anchor to be connected to the telescopic rod in an arbitrary direction.

  According to the first aspect of the present invention, since the rotational reaction force during excavation of the excavator is received on the ground via the telescopic rod and the anchor, the rotational reaction force applied to the worker having the excavator is reduced. Workers can carry out excavation work with the handle of the excavator, and labor saving can be achieved. In addition, a large-scale device such as when using a mounting table is not necessary, and excavation work can be performed with a simple device configuration, which is advantageous for storage, transportation and handling for the contractor, and is economical for the user. Not only the burden but also the labor burden is reduced.

  According to the invention of claim 2, the same effect as that of the invention of claim 1 can be obtained. In addition, even when the anchor cannot be driven as in the case where the ground is paved with concrete or the like, it is subjected to rotational reaction force by placing a weight such as a cement bag on the anchor, and the construction of the hole for the foundation is performed. Can be done.

  According to the third aspect of the present invention, the excavation of the foundation hole by the method of the first and second aspects becomes possible, and the effect described in the first aspect can be obtained. The telescopic rod and anchor are connected by a universal joint, so that the anchor can be connected to the excavator via the telescopic rod even if the orientation and inclination of the anchor changes depending on the situation at the site. Since work can be performed without considering the posture of the anchor, workability is improved.

It is a side view showing one embodiment of the excavation method of the present invention in the initial state of excavation of work. It is a disassembled side view which shows the structure of the excavation apparatus of embodiment shown in FIG. (A), (B) is sectional drawing which shows the structure of the connection part of the screw auger of the excavator of this embodiment in a isolation | separation state and a connection state, respectively. (A) is the side view which shows the anchor of this embodiment, (B) is the top view. (A) is a top view which shows the state which connected the universal joint to the anchor in this embodiment, (B) is the side view. It is a side view which shows a part of expansion-contraction rod of this embodiment. It is a side view which shows the operation state following FIG. FIG. 8 is a side view showing a working state following FIG. 7. FIG. 9 is a side view showing a working state following FIG. 8. It is a side view which shows one Embodiment of the other excavation method by this invention.

  FIG. 1 is a side view showing an embodiment of the excavation method of the present invention in an initial state of excavation of work, and FIG. 2 is an exploded side view showing the configuration of the excavator of the embodiment shown in FIG. As shown in FIG. 1 and FIG. 2, a drilling device that performs this drilling method includes a hand-held small excavator 1, an anchor 2 driven into the ground, and an extendable rod 3 that connects the anchor 2 and the excavator 1. And a universal joint 4 for connecting the telescopic rod 3 to the anchor 2.

  The excavator body 5 is provided with a handle 7 held by an operator 6, and an electric motor 8 using a commercial power source (100 V) as a power source is installed in the excavator body 5. The excavator body 5 has a built-in speed reducer that decelerates the rotational output of the electric motor 8, and 9 is an output shaft that is driven at the reduced rotational speed. Two handles 7 are provided at an angle in a bifurcated manner, and a switch (not shown) for the electric motor 8 is provided on the right handle (not shown).

  A cylindrical adapter 10 is connected to the output shaft 9 of the electric motor 8. In FIG. 2, reference numeral 11 denotes an extension auger of a screw auger connected to the adapter 10, which is formed by welding screw blades 11b for excavation around a cylindrical shaft 11a. Reference numeral 12 denotes a tip auger of the screw auger, and the tip auger 12 is connected to the adapter 10 or the extension auger 11. The tip auger 12 is formed by welding a screw blade 12b for excavation around a cylindrical shaft 12a and attaching a leading member 12c for preventing runout at the tip of the cylindrical shaft 12a. As an example, the adapter 10 has a length of 45 cm, and the extension auger 11 and the tip auger 12 have a length of 50 cm and an outer diameter of 30 cm as an example.

  The upper end of the adapter 10, the upper end of the cylindrical shaft 11a of the extension auger 11, and the upper end of the cylindrical shaft 12a of the tip auger 12 are respectively fitted into the output shaft 9, the lower end of the adapter 10, and the lower end of the cylindrical shaft 11a of the extension auger 11, respectively. Thus, the step portion 15 is formed in the lower portion of the small diameter portion 14. Connection holes 16 are provided in the vicinity of the lower end of the output shaft 9, the lower end of the adapter 10, and the lower end of the cylindrical shaft 11 a of the extension auger 11. Each small diameter portion 14 at the upper end of the adapter 10, the upper end of the cylindrical shaft 11 a of the extension auger 11 and the upper end of the cylindrical shaft 12 a of the tip auger 12 is provided with a retaining button 17 that fits into the hole 16.

  FIG. 3 shows a connecting portion between the output shaft 9 and the adapter 10. The button 17 is attached to the small-diameter portion 14 of the cylindrical adapter 10 so as to be able to project outward from the side surface, and a force that projects outward by a spring 18 built in the adapter 10 is applied to the button 17. Has been. If the small diameter portion 14 of the adapter 10 is inserted into the output shaft 9 by pushing the button 17 with a finger, the button 17 is connected to the lower end of the output shaft 9 when the step portion 15 of the adapter 10 comes into contact with the lower end of the output shaft 9. A position that matches the hole 16 is reached, the button 17 is pushed outward by the spring 18 and fitted into the hole 16, and the adapter 10 is connected to the output shaft 9.

  When removing the adapter 10 from the output shaft 9, the adapter 0 can be pulled out of the output shaft 9 by pushing the button 17 into the hole 16 and pulling the adapter 10. In order to smoothly attach / detach the button 17 to / from the hole 16, the tip 17a of the button 17 is formed in an arc shape or a truncated cone shape. Since the connecting portion of the extension auger 11 and the tip auger 12 to the adapter 10 and the connecting portion of the extension auger 11 and the tip auger 12 are similarly configured, the extension auger 11 and the tip auger 12 are connected to the output shaft 9. It can be attached to and detached from the adapter 10 with compatibility.

  As shown in FIGS. 4 (A) and 4 (B), the anchor 2 of this embodiment has an L-shaped cross section, and has a sharp tip 2a to facilitate driving into the ground. The upper end is welded with a receiving plate 2b for striking at the time of driving. In addition, the anchor 2 is provided with a plurality of holes 2c for connecting and fixing the connector 20 (see FIG. 5) to the anchor 2 with an interval in the vertical direction.

  As shown in FIGS. 5A and 5B, the universal joint 4 has a U-shaped fixing member 21 fixed to the distal end of the telescopic rod 3 by welding or the like, and the fixing member 21 is connected to the fixing member 21 via a horizontal shaft 22. A U-shaped rotating member 23 is connected so as to be vertically rotatable, a fixing member 24 is fixed to the rotating member 23 by welding or the like, and the frame 25 of the connector 20 is attached to the fixing member 24 with the horizontal shaft 22. It is connected so as to be rotatable by a longitudinal axis 26 that is oriented perpendicularly to the axis. The frame 25 of the connector 20 has a gap 27 into which the anchor 2 is inserted. A receiving portion 28 of the anchor 2 is formed on one side of the gap 27, and a nut 29 is welded to the other side. In this case, a clamp bolt 30 having a turning handle 30a for fixing the anchor 2 is screwed. The tip of the clamp bolt 30 has an arc surface and has a diameter slightly larger than the hole 2c of the anchor 2. In this connector 20, the connector 20 is positioned so that the hole 2c of the anchor 2 is positioned in the gap 27, the clamp bolt 30 is rotated with respect to the nut 29, and the tip of the bolt 30 is inserted into the hole 2c. The connector 20 can be fixed to the anchor 2 by press-contacting.

  As shown in FIG. 6, the telescopic rod 3 connects the end rod 3 a on the excavator 1 side to a bracket 31 fixed to the lower portion of the excavator body 5 so as to be pivotable in the vertical direction around a pin 32. The outer diameter of the end rod 3a is smaller than the inner diameter of the cylindrical main body 3b, and a circular sliding member 3c provided at the tip of the end rod 3a is slidably fitted into the cylindrical main body 3b. The state in which the sliding member 3c is in contact with the ring-shaped stopper 3d fixed to the end of the cylindrical main body 3b is the most extended state of the telescopic rod 3.

  In this embodiment, when constructing a concrete foundation for a carport, the excavator 1 is configured with an adapter 10 connected to the output shaft 9 and a tip auger 12 connected to the adapter 10 as shown in FIG. To do. The telescopic rod 3 is connected to a bracket 31 provided on the excavator body 5 by a pin 32. And a position is set about the location which excavates the hole for foundations. Then, in a state where the tip auger 12 and the like of the excavator 1 are vertical, the anchor 2 is driven into a position on the ground where the connecting tool 20 can reach with the telescopic rod 3 extended most. Then, the connector 20 is connected to the anchor 2 as shown in FIG.

In this way, the anchor 2 is connected to the excavator 1 via the telescopic rod 3, the worker 6 has the handle 7, the tip auger 12 and the like are in a vertical posture, and the telescopic rod 3 is tilted diagonally. In this state, by driving the electric motor 8 using a commercial power source as a power source, the tip auger 12 is rotationally driven together with the output shaft 9 and the adapter 10 to perform excavation. During this excavation, the telescopic rod 3 connected to the excavator 1 descends together with the excavator 1 while contracting due to the lowering of the excavator 1 as the excavation proceeds. The rotational reaction force during excavation is received by the ground 33 through the telescopic rod 3 and the anchor 2. For this reason, the rotational reaction force borne by the worker 6 is small, and the worker only needs to pay attention to the vertical posture of the excavator 1.

  As shown in FIG. 7, when the top auger 12 is dug until the upper end of the tip auger 12 becomes substantially the same level as the ground surface 33a, the adapter 10 is removed from the tip auger 12, and the tip auger 12 and the adapter 10 are removed as shown in FIG. The extension auger 11 is connected between the two. Then, as described above, excavation is resumed, and when the upper end of the extension auger 11 is excavated until it reaches the same level as the ground surface 33a as shown in FIG. In this example, when the excavation is performed until the upper end of the extension auger 11 reaches the same level as the ground surface 33a as shown in FIG. 9, the depth H of the excavated foundation hole 34 is about 1 m.

  Thus, according to this embodiment, one worker 6 can carry out excavation work with the handle 7 of the excavator 1, and labor saving can be achieved. Further, since the rotational reaction force of the excavator 1 is received by the ground 33, a large-scale device as in the case of using a conventional installation table is not necessary, and excavation work can be performed with a simple device configuration. For this reason, it is advantageous for the contractor in storage, transportation, and handling, and not only the economic burden on the contractor but also the labor burden is reduced.

  Further, in this embodiment, since the telescopic rod 3 and the anchor 2 are connected by the universal joint 4, the anchor is connected via the telescopic rod 3 even if the orientation or inclination of the anchor 2 changes depending on the situation at the site. 2 can be connected to the excavator 1. For this reason, the worker 6 can proceed the work without considering the posture of the anchor 2, and workability is improved.

  FIG. 10 is a side view showing another embodiment of the present invention. In this embodiment, it is impossible to drive the anchor 2 like a portion where the anchor 2 is to be driven is paved with concrete or the like. In some cases, the anchor 2 is placed on the ground 33, and a weight 40 such as a cement bag is placed thereon, and this weight 40 receives the rotational reaction force during excavation. Assuming that an unused cement bag filled with cement is used as the weight 40, when constructing a concrete foundation, the cement bag 40 is always provided by the user and has a weight of, for example, 25 kg. Moreover, it can be used easily. According to this embodiment, there is an advantage that it can be easily implemented even when the anchor 2 cannot be driven into the ground.

  Although the present invention has been described above by the embodiments, the present invention is not limited to the above-described embodiments, and various modifications and additions can be made without departing from the gist of the present invention. For example, the present invention can be used for the construction of pillars for roofs for avoiding rain, and holes for foundations of simple buildings such as gardening and agriculture.

1: excavator, 2: anchor, 2c: hole, 3: telescopic rod, 3a: end rod, 3b: cylindrical main body, 3c: sliding member, 3d: stopper, 4: universal joint, 5: excavator Body: 6: Worker, 7: Handle, 8: Electric motor, 9: Output shaft, 10: Adapter, 11: Extension auger, 12: Tip auger, 14: Small diameter part, 15: Step part, 16: Hole, 17 : Button, 18: Spring, 20: Connector, 29: Nut, 30: Clamp bolt, 33: Ground, 40: Weight

Claims (3)

An anchor that is driven into the ground and a hand-held excavator having an electric motor driven screw auger that uses a commercial power source are connected by a telescopic rod,
In the state where the anchor is driven into the ground and the telescopic rod is inclined, an operator holds the handle of the excavator and rotates the screw auger of the excavator with the electric motor to excavate the ground.
While lowering the excavator due to the progress of the excavation and lowering the telescopic rod while contracting,
A method for excavating a foundation hole in a simple building, wherein the foundation hole is excavated in the ground while receiving the rotational reaction force of the screw auger on the ground via the telescopic rod and anchor. An anchor that mounts a weight and fixes it to the ground, and a hand-held excavator having an electric motor driven screw auger using a commercial power source are connected by an extendable rod,
With the weight placed on the anchor provided on the ground and with the telescopic rod inclined, an operator holds the excavator handle and rotates the screw auger of the excavator with the electric motor . Drilling,
While lowering the excavator due to the progress of the excavation and lowering the telescopic rod while contracting,
A drilling method for a foundation hole in a simple building, wherein the foundation hole is excavated in the ground while receiving the rotational reaction force of the screw auger by the weight via the telescopic rod and anchor. An anchor that can be driven into the ground,
A hand-held excavator having an electric motor driven screw auger using commercial power;
A telescopic rod that connects the excavator and the anchor and lowers the excavator while the excavator descends with the progress of excavation by the excavator ;
Excavation of the hole for the foundation of a simple building provided with the universal joint which is provided between the said anchor and the said expansion-contraction rod, and can connect the said anchor with arbitrary directions with respect to the said expansion-contraction rod apparatus.

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