Spiral Hanging Manipulator

Abstract

To provide a spiral pile operation tool allowing smoother screwing of a spiral pile into the ground or drawing out from the ground.SOLUTION: A spiral pile operation tool 1 includes a body 2, and a holding part 3 connected to the body 2. The body 2 includes: an inserted part 5 defining an insertion space A for inserting a spiral pile S; and a rotation restriction member 6 fitted to an inner peripheral face of the inserted part 5. The rotation restriction member 6 abuts on the spiral pile S and restricts rotation of the spiral pile S in relation to the inserted part 5. A drilling blade 51 is provided at a lower edge of the inserted part 5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a helical pile operating tool for driving a helical pile into the ground or pulling it out of the ground. [Background technology]

[0002] When installing horticultural greenhouses in agricultural fields, helical piles are often used as anchoring piles. To screw helical piles into the ground or pull them out, a rod is typically inserted through the head link of the helical pile and rotated. However, this type of work is not only hard work, but also requires a stooped posture, making it extremely difficult to do multiple piles at once. In particular, if the helical piles are left in the soil for many years, they can rust and become stuck, making it difficult to pull them out.

[0003] Therefore, various tools have been proposed to make it easier to drive and pull out such helical piles.For example, the helical pile driving machine disclosed in Patent Document 1 is configured so that the head of the helical pile is attached to a driver socket attached to a working shaft, and the helical pile is driven into or pulled out of the ground by rotating the working shaft using an engine. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Unexamined Utility Model Publication No. Hei 2-84846 Summary of the Invention [Problem to be solved by the invention]

[0005] As disclosed in Patent Document 1, when the helical pile is rotated with only the head fixed, a load is applied only to the head of the helical pile, which frequently causes the head to be torn off. Also, when using power from an engine or the like, if the helical pile hits an underground obstacle (such as a stone), a large recoil occurs, which can pose a risk to the user, such as being swung around.

[0006] Furthermore, when screwing a helical pile into the ground, the tip of the helical pile is first placed against the ground and then the helical pile is started to turn in this state, but there is a problem in that the position of the helical pile is not stable just by placing the tip of the helical pile against the ground, and the helical pile does not screw properly into the ground even when rotated.

[0007] An object of the present invention is to provide a helical pile manipulator that can more smoothly screw a helical pile into the ground and pull it out from the ground. [Means for solving the problem]

[0008] The helical pile operating tool of the present invention comprises a main body and a gripping portion connected to the main body, the main body comprising an insertable portion that defines an insertion space into which the helical pile is inserted, and a rotation control member attached to the inner surface of the insertable portion, the rotation control member abutting against the helical pile to control the rotation of the helical pile relative to the insertable portion, and a hole-punching blade is provided on the lower edge of the insertable portion.

[0009] The screw pile operating tool of the present invention comprises a main body and a gripping portion connected to the main body, the main body comprising an inserted portion that defines an insertion space into which the screw pile is inserted, and a rotation control member attached to the inner surface of the inserted portion, the inserted portion comprising a plurality of tubular members arranged in parallel at intervals along the longitudinal direction of the inserted portion, the rotation control member abutting against the screw pile to control rotation of the screw pile relative to the inserted portion, and the rotation control member consisting of a pair of elongated members arranged in parallel. [Effects of the Invention]

[0010] According to the helical pile operating tool of the present invention, a drilling blade is provided on the lower edge of the insertion portion into which the helical pile is inserted, so that the formation of a pilot hole for screwing the helical pile and the screwing operation of the helical pile can be performed using only the helical pile operating tool. Furthermore, by inserting the helical pile into a pre-formed pilot hole and performing the screwing operation, the helical pile can be smoothly screwed into the ground, improving work efficiency. Furthermore, when removing the helical pile from the ground, the work of digging a hole around the helical pile and the work of pulling out the helical pile can be performed using only the helical pile operating tool. Furthermore, by pre-digging a hole around the helical pile, the helical pile can be easily pulled out, which also improves work efficiency. Furthermore, the screwing and pulling out of the helical pile can be performed while standing, reducing the physical burden on the worker.

[0011] According to the helical pile operating tool of the present invention, the rotation of the helical pile relative to the inserted portion is restricted by the rotation restricting member abutting against the helical pile. Therefore, by gripping the gripping portion and rotating the main body, the helical pile can be rotated integrally with the main body, thereby facilitating screwing and pulling out of the helical pile. Furthermore, the inserted portion includes multiple tubular members arranged in parallel at intervals along the longitudinal direction of the inserted portion, allowing the insertion depth of the helical pile inserted into the inserted portion to be visually confirmed from the outside through the gap, making it easy to use. Furthermore, since the rotation restricting member is composed of a pair of elongated members arranged in parallel, the helical pile can be smoothly rotated in response to the rotation of the elongated members. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a perspective view showing a helical pile operating tool according to an embodiment of the present invention together with a helical pile. FIG. [Figure 2] FIG. 2 is an enlarged perspective view showing a lower part of the helical pile operating tool of FIG. 1. [Figure 3] FIG. 2 is a cross-sectional view showing the state in which a helical pile is inserted into the helical pile operating tool of FIG. 1. [Figure 4] 4 is a cross-sectional view showing the state in which the helical pile operating device of FIG. 1 has been rotated counterclockwise from the state shown in FIG. 3. [Figure 5]2 is a diagram illustrating the procedure for driving a helical pile into the ground using the helical pile operating tool of FIG. 1. FIG. [Figure 6] 2 is a diagram illustrating the procedure for driving a helical pile into the ground using the helical pile operating tool of FIG. 1. FIG. [Figure 7] 2 is a diagram illustrating the procedure for pulling out a helical pile from the ground using the helical pile operating tool of FIG. 1. FIG. [Figure 8] FIG. 10 is a cross-sectional view showing a state in which a helical pile is inserted into a helical pile operating tool according to a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, a helical pile operating tool according to an embodiment of the present invention will be described with reference to the accompanying drawings. Referring to Fig. 1, a helical pile operating tool (hereinafter simply referred to as "operating tool") 1 according to an embodiment of the present invention is used when manually screwing a helical pile S into or pulling it out of the ground, and comprises a main body 2, a gripping portion 3, and a support shaft 4 that extends in the vertical direction D1 and connects the main body 2 and the gripping portion 3. The main body 2 comprises an inserted portion 5 that defines an insertion space A into which the helical pile S is inserted, and a rotation restricting member 6 attached to the inner circumferential surface of the inserted portion 5. The gripping portion 3 is located at the upper end of the support shaft 4 and extends horizontally.

[0014] The inserted portion 5 includes a plurality of tubular members 7 arranged in parallel at intervals (gaps G) along the longitudinal direction (vertical direction) D1 of the inserted portion 5, and the insertion space A is exposed to the outside via the gaps G. In this embodiment, the plurality of tubular members 7 include tubular members 7A, 7B, and 7C, each of which has a cylindrical shape. A hole punching blade 51 is provided on the lower edge of the inserted portion 5 (in other words, the lower edge of the tubular member 7A located at the lowest end), allowing the inserted portion 5 to also function as a hole punching member. In this embodiment, the hole punching blade 51 has a wavy shape. The hole punching blade 51 is also circular in bottom view.

[0015] The rotation control member 6 abuts against the helical pile S inserted into the inserted portion 5 to control the rotation of the helical pile S relative to the inserted portion 5, and in this embodiment is composed of a pair of elongated members 61 extending along the longitudinal direction D1 of the inserted portion 5, and each elongated member 61 is arranged to be hung across multiple tubular members 7.

[0016] More specifically, the pair of elongated members 61 are arranged facing each other with a horizontal gap between them, and are arranged symmetrically with respect to the central axis of the inserted portion 5 extending in the longitudinal direction D1. As shown in FIG. 2 , in this embodiment, the pair of elongated members 61 have an L-shaped cross section, and are arranged so that their corners 61a face each other. The corners 61a are preferably, but not limited to, right angles. Furthermore, the lower end 61b of each elongated member 61 is preferably located above the hole punching blade 51 provided on the lower edge of the inserted portion 5.

[0017] 1, the upper end portions of the pair of elongated members 61 are fixed to both side surfaces of the support shaft 4, and when the helical pile S is inserted into the insertion portion 5 of the operating tool 1 from below, the head S1 of the helical pile S abuts against the lower end 41 of the connector 4, thereby restricting the maximum insertion depth of the helical pile S into the insertion portion 5 (insertion space A). That is, in this embodiment, the lower end 41 of the connector 4 functions as the bottom of the insertion space A into which the helical pile S is inserted.

[0018] When the helical pile S is inserted into the inserted portion 5 (insertion space A) of the operating tool 1 from below and the operating tool 1 is rotated in a predetermined direction (clockwise) relative to the helical pile S, the helical pile S comes into contact with the pair of elongated members 61 as shown in Fig. 3, preventing the operating tool 1 from spinning freely relative to the helical pile S, and the helical pile S rotates together with the operating tool 1. When the operating tool 1 is rotated in the opposite direction (counterclockwise) from the state shown in Fig. 3, the pair of elongated members 61 come into contact with the helical pile S after rotating by approximately 90° as shown in Fig. 4, preventing the operating tool 1 from spinning freely relative to the helical pile S, and the helical pile S rotates together with the operating tool 1. In other words, a play of approximately 90° is set between the helical pile S and the elongated members 61. In other words, in a predetermined rotation direction of the operating tool 1, the angle between the position where the helical pile S abuts the upstream portion of the elongated member 61 and the position where it abuts the downstream portion is set to approximately 90°.

[0019] 3 and 4, the long member 61 is inserted into the insertion space A. to When inserted, the inner end portion (here, the corner portion 61a) of the elongated member 61 in the radial direction of the insertion space A is configured to be positioned radially inward of both horizontal ends S11 of the head S1 of the helical pile S.

[0020] 1, the length L1 from the head S1 of a general helical pile S to the upper curved portion 21 of the helical portion S2 is about 24 cm, so it is preferable that the length L2 from the bottom of the insertion space A (i.e., the lower end 41 of the connector 4) to the lower end 61b of the elongated member 61 is 25 cm or more. By setting it in this way, when the helical pile S is inserted into the inserted portion 5 (insertion space A) of the operating tool 1 to the maximum insertion depth, the head of the helical pile S S1 In addition, since the upper curved portion S21 also abuts against the elongated member 61, the risk of the head portion S2 being twisted off due to a load being applied only to the head portion S2 for a long period of time can be reduced.

[0021] Although helical piles S are available in various lengths, the length L1 from the head S1 to the upper curved portion S21 of the helical portion S2 is almost the same regardless of the overall length of the helical pile S, and only the length of the helical portion S2 (number of helices) is different.Therefore, by making the length L1 25 cm or more, helical piles S of various lengths can be accommodated.

[0022] Furthermore, it is preferable that the width dimension L3 (Fig. 2) of the gap G between adjacent tubular members 7 is 4 cm or less. By setting the width dimension L3 of the gap G to 4 cm or less in this way, it is possible to prevent the head S1 of the helical pile S from protruding out of the gap G when the helical pile S is inserted into the operating tool 1, thereby preventing the helical pile S from becoming unstable.

[0023] Next, we will explain how to screw the helical pile S into the ground using the operating tool 1. First, the lower end (hole drilling blade 51) of the operating tool 1 is brought into contact with the ground. The gripping portion 3 is grasped and the operating tool 1 is rotated back and forth horizontally to drill a pilot hole H in the ground as shown in Figure 5. The depth of the pilot hole H is preferably about 15 cm.

[0024] Here, as described above, by positioning the lower end 61b of the elongated member 61 above the drilling blade 51, the elongated member 61 does not interfere with the formation of the pilot hole H by the drilling blade 51. Furthermore, since a gap G is provided between the cylindrical members 7A and 7B, excess soil generated when drilling the pilot hole H is discharged to the outside of the operating tool 1 through the gap G, allowing the drilling operation to be carried out smoothly.

[0025] Next, as shown in Figure 6, the tip of the helical pile S is inserted into the pilot hole H, and the operating tool 1 is placed over the helical pile S, and the helical pile S is inserted into the inserted portion 5 of the operating tool 1. When the operating tool 1 is rotated in a predetermined direction (clockwise) in this state, the head S1 of the helical pile S and the upper curved portion S21 of the helical portion S2 come into contact with the elongated member 61 (Figure 3), as described above, and the helical pile S is screwed into the ground.

[0026] After the helical pile S is screwed into the ground to a depth where the bottom end of the operating tool 1 touches the ground, the helical pile S, as it is screwed into the ground, slips downward out of the operating tool 1. At this time, the helical pile S inserted into the insertion space A can be seen from the outside through the gap G, so the worker can visually check how far the helical pile S has been screwed into the ground, making it easy to use.

[0027] The pilot hole H is drilled here for the following reason. As mentioned above, when screwing the helical pile S into the ground, the tip of the helical pile S is usually placed in contact with the ground before the helical pile S begins to rotate. However, this makes the position of the helical pile S unstable, and the helical pile S does not screw properly into the ground even when rotated. This is because the tip of the helical pile S is not positioned on the longitudinal central axis of the helical pile S. In other words, when the helical pile S is rotated around its central axis, the tip of the helical pile S traces a circular trajectory.

[0028] In contrast, by drilling a pilot hole H and inserting the helical pile S, the posture of the helical pile S is stabilized, and by rotating the helical pile S in this state, the helical pile S will be smoothly screwed into the ground.

[0029] Next, we will explain how to pull out the helical pile S from the ground using the operating tool 1. First, as shown in Figure 7, the operating tool 1 is placed over the head S1 of the helical pile S that is exposed above the ground, and the hole-making blade 51 is brought into contact with the ground. The gripping part 3 is grasped and rotated back and forth horizontally to loosen the soil around the helical pile S and dig a hole.

[0030] As described above, a predetermined amount of play (90°) is provided between the elongated member 61 and the helical pile S. Therefore, even when the operating tool 1 is placed over the head S1 of the helical pile S and in contact with the ground as shown in Fig. 7, the operating tool 1 can be rotated back and forth horizontally to loosen the soil around the helical pile S. The play between the elongated member 61 and the helical pile S does not necessarily have to be 90°, but is preferably 45° or more. By providing play of 45° or more in this way, the operating tool 1 can be rotated back and forth to drill holes around the helical pile S even when the helical pile S is inserted into the operating tool 1.

[0031] Furthermore, a gap G is provided between the cylindrical members 7A and 7B, and excess soil is discharged to the outside of the operating tool 1 through the gap G. In this way, by digging a hole with the helical pile S at the center, the helical pile S can be easily removed.

[0032] Once the hole has been drilled to a certain depth, the gripping portion 3 is grasped and the operating tool 1 is rotated in the opposite direction (counterclockwise) to the predetermined direction. This causes the head S1 of the helical pile S to abut against the long member 61 (Fig. 4), restricting the rotation of the helical pile S relative to the operating tool 1, and the helical pile S rotates counterclockwise together with the operating tool 1, and is pulled out of the ground. Note that if the helical pile S is severely stuck and will not rotate even after doing this, it is best to return to digging the soil.

[0033] The helical pile S thus extracted rises within the insertion space A of the operating tool 1, and when the helical pile S reaches the bottom of the insertion space A, not only the head portion S1 but also the upper curved portion S21 of the helical pile S comes into contact with the elongated member 61. This prevents continuous load from being applied only to the head portion S1, reducing the risk of the head portion S1 being torn off. After the helical pile S rises to the bottom of the insertion space A, the operating tool 1 is also lifted upward together with the helical pile S.

[0034] As described above, the operating tool 1 according to this embodiment allows the operator to operate the helical pile S while standing, which makes it easy to screw the helical pile S into the ground and to pull it out of the ground.

[0035] In addition, since a hole drilling blade 51 is provided on the lower edge of the operating tool 1, the operating tool 1 can be used to form pilot holes H and to drill holes around the helical pile S installed in the ground, making it easy to use.

[0036] Furthermore, the rotation restricting member 6 is composed of a pair of elongated members 61, and the inner end (corner 61a) of the elongated member 61 in the radial direction of the insertion space A is configured to be located inside both horizontal ends S11 of the head S1 of the helical pile S. Therefore, the helical pile S abuts against the elongated member 61 without wobbling, and the helical shaft S can be rotated efficiently when the gripping part 1 is gripped and the main body 2 is rotated. That is, when a elongated member 161 is used as shown in FIG. 8 and the head S1 of the helical pile S abuts against the flat inner surface 161a of the elongated member 161, the contact area between the elongated member 161 and the helical pile S becomes small, and the helical pile S becomes more likely to wobble relative to the elongated member 61. In contrast, in this embodiment, the contact area between the elongated member 61 and the helical pile S is larger (the contact point becomes longer in the vertical direction D1), so the helical pile S is less likely to wobble relative to the elongated member 61.

[0037] Furthermore, the long member 61 abuts not only the head S1 of the helical pile S but also the upper curved portion S21 to rotate the helical pile S, making it possible to make the head S1 less likely to be torn off.

[0038] The above describes the screw pile operating tool according to an embodiment of the present invention with reference to the accompanying drawings, but the present invention is not limited to such an embodiment, and various modifications and alterations are possible without departing from the scope of the present invention.

[0039] For example, the shape of the punching blade 51 is not limited to a wave shape and may be, for example, a sawtooth shape. Also, each elongated member 61 is not limited to one with an L-shaped cross section and may be, for example, a cylindrical shape or a square prism shape.

[0040] Furthermore, the cylindrical members 7 (cylindrical members 7B and 7C) other than cylindrical member 7A are not limited to a cylindrical shape and may be, for example, a rectangular cylindrical shape. The number of cylindrical members 7 is also not limited to three and may be two or four or more.

[0041] In the above embodiment, the lower end 41 of the support shaft 4 functions as the bottom of the storage space A, but it is also possible to provide a member other than the support shaft 4 and use that member as the bottom of the storage space A. Alternatively, it is also possible to use a support shaft having a shape different from that shown in FIG. 1 and have a portion other than the lower end of the support shaft function as the bottom of the storage space A. [Explanation of symbols]

[0042] 1 Spiral pile operating tool 2 Main unit 3 Gripping part 5 Inserted part 6 Rotation restriction member 7 Cylindrical member 61 Long members 51 Hole punch G Gap

Claims

1. The main body and a grip portion connected to the main body, The main body includes an inserted portion that defines an insertion space into which the helical pile is inserted, and a rotation restricting member attached to the inner circumferential surface of the inserted portion, The rotation restricting member abuts against the helical pile to restrict rotation of the helical pile relative to the inserted portion, A hole punching blade is provided on the lower edge of the inserted portion, The rotation restricting member is made up of a pair of elongated members arranged in parallel, Each elongated member extends along the longitudinal direction of the insertion portion, In the radial direction of the insertion space, each elongated member has an L-shape that has a corner at its inner end and widens outward.

2. A helical pile operating tool as described in claim 1, wherein when the helical pile is inserted into the insertion space, the corner portion of the elongated member is located radially inward of the insertion space relative to both horizontal ends of the head of the helical pile.

3. The screw pile operating tool according to claim 1 or 2, wherein a lower end of the rotation restricting member is located above a lower end of the inserted portion.

4. 4. The screw pile operating tool according to claim 1, wherein the length from the bottom of the insertion space to the lower end of the elongated member is 25 cm or more.

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