Hand-dug hole digging tool

Abstract

This invention provides a simple, hand-operated hole-digging tool that can always be used in a state that makes digging easy and allows for efficient removal of excavated material to the surface. [Solution] The device includes an excavation section 16 formed in a rectangular frame shape by arranging excavation pieces 24(1) to 24(4) in a ring. It also includes a storage section 18 for accommodating excavated material that has passed inside the excavation section 16. A gripping section is attached to the outside of the storage section 18 via a gripping section attachment member 22. The storage section 18 has a storage section side surface 26 on which the excavation section 16 is continuously formed at one end in the longitudinal direction of the cylindrical outer shape, and a storage section closing surface 28 that closes the end of the storage section side surface 26 opposite to the excavation section 16. The gripping section attachment member 22 consists of a band member 34 fixed to the end of the gripping section 22 and shaped to surround the outer circumference of the storage section side surface 26, and a band tightening / loosening member 36 that can tighten or loosen the band member 34, and the position of the gripping section 20 can be adjusted by operating the band tightening / loosening member 36.

Description

Technical Field

[0001] The present invention relates to a hole-digging tool used when digging holes manually, and particularly to a manual hole-digging tool suitable for digging small-scale vertical holes in the ground.

Background Art

[0002] Conventionally, for example, as disclosed in Patent Document 1, there is a bucket-type manual scoop in which the side surface is configured at a right angle to the bottom surface of the bucket, and a grip is provided parallel to the cutting edge at a position on the bucket opposite to the position where the cutting edge is located (Example 1, FIG. 1). This manual scoop is considered suitable for digging small-scale rectangular vertical holes. Also, it is described that the grip may be provided at a position on the bucket opposite to the position where the cutting edge is located, perpendicular to the cutting edge and parallel to the bottom surface (Example 2, FIG. 2). [[ID=1##]]

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When digging a vertical hole with this type of manual hole-digging tool, the positional relationship between the excavation part for scraping soil and the gripping part held by the user greatly affects the ease of digging. The positional relationship refers to the distance between the excavation part and the gripping part, the attachment angle of the gripping part with respect to the excavation part, etc. The optimal positional relationship varies depending on the size (size and depth) of the vertical hole and also on the user's preference. Also, there may be cases where different shapes of cutting edges are to be selectively used according to the situation such as the hardness of the soil and the size of the stones contained in the soil. In addition, in order to efficiently discharge the excavated material generated by scraping the inner surface (inner wall surface and bottom surface) of the hole to the ground, the size of the storage part for storing the excavated material should be relatively large.

[0005] The hand-digging shovel described in Patent Document 1 has a fixed positional relationship between the bucket's blade and the grip, which the user cannot adjust, and there is only one type of blade available. Therefore, the user has to put up with using it even if it is difficult to dig with. For example, one could consider preparing several types of shovels with different grip structures and blade shapes and using them according to the situation, but in reality, it is difficult to prepare multiple types of shovels.

[0006] Furthermore, when designing the hand-digging shovel described in Patent Document 1, if the bucket size is increased to efficiently discharge the excavated material to the surface, the relative positions of the blade and the grip inevitably change. In other words, in the case of this hand-digging shovel, the bucket size and the relative positions of the blade and the grip cannot be adjusted separately, making it extremely difficult to design them in a balanced way.

[0007] This invention has been made in view of the above-mentioned background art, and aims to provide a simple hand-dug hole-digging tool that can always be used in a state that makes digging holes easy and that can efficiently discharge the excavated material to the surface. [Means for solving the problem]

[0008] The present invention comprises an excavation section formed in an n-sided frame shape by arranging n excavation pieces (where n is a natural number of 3 or more) in a ring, a storage section for accommodating excavated material that has passed inside the excavation section, and a gripping section attached to the outside of the storage section via a gripping section attachment member. The housing portion has a housing portion side surface on which the excavation portion is continuously formed at one end in the longitudinal direction of the cylindrical outer shape, and a housing portion closing surface that closes the end of the housing portion side surface opposite to the excavation portion. The gripping attachment member is a hand-dug hole-digging tool in which a band member is fixed to the end of the gripping portion and has a shape that surrounds the outer circumference of the side surface of the housing portion, and a band tightening / loosening member that can tighten or loosen the band member, and the band member can be fixed to the outer circumference of the side surface of the housing portion by tightening the band member with the band tightening / loosening member, and the band member can be released by loosening the band member. Preferably, in the digging portion, two or more of the n digging pieces are digging pieces with multiple cutting edges arranged in parallel.

[0009] Furthermore, the present invention comprises an excavation section formed in an n-sided frame shape by arranging n excavation pieces (where n is a natural number of 3 or more) in a ring, a storage section for accommodating excavated material that has passed inside the excavation section, and a gripping section attached to the outside of the storage section. The housing section has a housing section side surface and a housing section closing surface that closes the end of the housing section side surface opposite to the excavation section, The excavation section is a hand-operated hole-digging tool in which two or more of the n excavation pieces are cutting edge pieces with multiple cutting edges arranged in parallel.

[0010] Preferably, the shape and / or pitch of the multiple cutting edges differ for each of the two or more cutting edge digging pieces. The digging section may also be formed in a rectangular frame shape by arranging four digging pieces in a ring. The housing section closing surface may be provided so that the housing section, to which the gripping part is attached, is self-supporting when placed on a flat surface with the housing section closing surface facing downwards. The inner wall surface of the side surface of the housing section may have markings for measuring the amount of excavated material or other contents. The gripping part may be attached so as to stand upright on the outer surface of the side surface of the housing section, and a flange-shaped portion may be formed at the end closer to the side surface of the housing section to protect the user's hand. [Effects of the Invention]

[0011] The hand-operated hole-digging tool of the present invention has a unique digging section consisting of n digging pieces, and the user can freely adjust the positional relationship between each digging piece and the gripping section. Furthermore, in types equipped with two or more types of digging pieces with cutting edges, the user can select the digging piece with the cutting edge to be used according to the situation. Therefore, the user can always use the hand-operated hole-digging tool in a state that makes digging holes easy.

[0012] Furthermore, the storage section has a bottomed cylindrical shape, and its volume can be adjusted by changing the length of the cylindrical section. Therefore, by preparing multiple storage sections with progressively different cylindrical lengths, it is possible to select the storage section with the optimal volume according to the site conditions. Moreover, changing the storage section has almost no effect on the positional relationship between each excavation piece and the gripping section. Thus, it is possible to easily obtain a hand-operated hole-digging tool that makes it easy to dig holes and efficiently discharge the excavated material to the surface. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view showing the appearance of one embodiment of the hand-dug hole-digging tool of the present invention. [Figure 2] These are a plan view (a) and a front view (b) showing the excavation section and the storage section that constitute the hand-dug hole-digging tool of this embodiment. [Figure 3] These are a plan view (a) and a front view (b) showing the gripping part and gripping part mounting member that constitute the hand-dug hole-digging tool of this embodiment. [Figure 4] This figure shows an example of how to use the hand-drilling tool of this embodiment, and is a plan view (a) showing the mounting position of the gripping part when rough digging with the first drilling piece (drilling piece with cutting edge), and a plan view (b) showing the mounting position of the gripping part when finishing digging with the fourth drilling piece. [Figure 5] This figure shows an example of how to use the hand-dug hole-digging tool of this embodiment, and is a front view (a) and (b) showing two mounting states in which the distance between the digging part and the gripping part is changed. [Figure 6]The figure shows an example of using the manual hole digger of this embodiment, which is a perspective view (a) showing an example of using it to dig a small vertical hole in the ground, and a perspective view (b) showing an example of using it to remove earth and sand accumulated in a side ditch.

Embodiment for Implementing the Invention

[0014] Hereinafter, an embodiment of the manual hole digger of the present invention will be described based on the drawings. The manual hole digger 10 of this embodiment is used, for example, as shown in Fig. 5(a), when excavating a small rectangular parallelepiped vertical hole 14 in the ground 12.

[0015] First, the configuration of the manual hole digger 10 will be described. As shown in Fig. 1, the manual hole digger 10 includes an excavation part 16, a storage part 18 for storing the excavated material (such as the soil scraped by the excavation part 16), and a gripping part 20 that the user holds. The gripping part 22 is attached to the outside of the storage part 18 via a gripping part attachment member 22.

[0016] As shown in Figs. 1 and 2(a), the excavation part 16 is formed in a rectangular frame shape with the first to fourth excavation pieces 24(1) to 24(4) arranged in a circular order in sequence. The first excavation piece 24(1) is an excavation piece with cutting edges in which a plurality of elongated cutting edges are arranged side by side at a predetermined interval, and the fourth excavation piece 24(4) is an excavation piece with cutting edges in which a plurality of substantially triangular cutting edges are arranged side by side. The excavation piece with cutting edges is preferably used when performing rough excavation to dig deep into the inner surface (inner wall surface and bottom surface) of the hole. The second and third excavation pieces 24(2) and 24(3) are plate-shaped excavation pieces without cutting edges, and the plate-shaped excavation pieces are preferably used when performing finish excavation to flatten the inner surface (inner wall surface and bottom surface) of the hole.

[0017] As shown in Figs. 1 and 2(b), the storage part 22 has a storage part side surface 26 in which the excavation part 16 is continuously formed at one end in the length direction of the cylindrical outer shape, and a flat storage part closing surface 28 that closes the end of the storage part side surface 26 opposite to the excavation part 16. The inner space surrounded by the storage part side surface 26 and the storage part closing surface 28 becomes a storage space 30 for storing the excavated material.

[0018] The side surface 26 of the accommodating portion is arranged substantially coaxially with the excavating portion 16, and the outer diameter of the side surface 26 of the accommodating portion is set to fit inside the excavating portion 16. The closing surface 26 of the accommodating portion is arranged substantially perpendicular to the longitudinal direction of the side surface 26 of the accommodating portion, and the accommodating portion 18 is provided so as to stand on its own when the closing surface 26 of the accommodating portion is placed on a flat surface with the lower side facing downwards. Further, a scale 32 for measuring the amount of excavated material or other stored material is provided on the inner wall surface of the side surface 26 of the accommodating portion.

[0019] As shown in FIGS. 1, 3(a), and 3(b), the gripping portion 20 is a rod-shaped member that a user holds by hand. Since it is assumed that the user may hold and use the gripping portion 20 with the right hand and the left hand alternately when digging a hole, the shape of the gripping portion 20 is preferably such that it can be held by either the right hand or the left hand.

[0020] The gripping portion attachment member 22 is composed of a band member 34 and a band tightening / loosening member 36. The band member 34 is a ring-shaped member that is separated at one location in the longitudinal direction to form two end portions 34a and 34b, has a shape that wraps around the outer periphery of the side surface 26 of the accommodating portion, and the outer portion of the central portion is fixed to one end portion of the gripping portion 20. Further, through holes 34c that communicate with each other are provided in the end portions 34a and 34b, respectively.

[0021] The band tightening / loosening member 36 is composed of a bolt 38, a nut 40, and an operation knob 42. The bolt 38 has a threaded portion 38a inserted into the through holes 34c of the two end portions 34a and 34b, and a head portion 38b embedded in the end portion 34b so as not to rotate. The nut 40 is arranged on the outer surface side of the end portion 34a and is screwed onto the threaded portion 38a of the bolt 38. The operation knob 42 is attached to the nut 40 at one end portion so that the nut 40 can be rotated in both directions.

[0022] Therefore, turning the operating knob 42 in the direction of screwing the bolt 38 and nut 40 more deeply tightens the band member 34, thereby fixing the band member 34 to the outer circumference of the housing side surface 26. Conversely, turning the operating knob 42 in the direction of reducing the screwing of the bolt 38 and nut 40 loosens the band member 34, thereby releasing the band member 34 from its fixation.

[0023] In addition, when the gripping portion 20 is attached to the side surface 18 of the housing portion, a flange-like portion 20a is formed at the end closer to the side surface 26 of the housing portion to protect the user's hand.

[0024] Next, an example of how to use the hand-dug hole-digging tool 10 will be explained. When excavating a vertical hole 14 as shown in Figure 6(a), it is common to first perform rough digging to dig the hole deep, and finally perform finishing digging to flatten the sides and bottom of the hole.

[0025] When rough digging, it is preferable to use the first or second digging piece 24(1) or 24(2), which are digging pieces with cutting edges. Since the layout of the cutting edges (shape, pitch, or both) of digging pieces 24(1) and 24(4) are different, the user should decide which to use based on the conditions such as the hardness of the soil and the size of the stones contained in the soil. When using the first digging piece 24(1), it is preferable to fix the gripping part 20 at the 6 o'clock position in a plan view, as shown in Figure 4(a). Alternatively, it may be finely adjusted to the 5 o'clock or 7 o'clock position according to the user's preference.

[0026] When performing finishing work, it is preferable to use the third or fourth drilling piece 24(3), 24(4) which does not have a cutting edge. When using the fourth drilling piece 24(4), it is preferable to fix the gripping part 20 at the 9 o'clock position in a plan view, as shown in Figure 4(b). Alternatively, it may be finely adjusted to the 8 o'clock or 10 o'clock position according to the user's preference.

[0027] In addition, although not shown in the drawings, the hole may be drilled at the corner where the third drilling piece 24(3) and the fourth drilling piece 24(4) intersect, in which case the gripping part 20 should be fixed at the 10 o'clock or 11 o'clock position in a plan view. The same applies when using other corners.

[0028] The mounting angle of the gripping portion 20 can be freely changed by the user by operating the gripping portion mounting member 22, so the user can easily optimize the mounting angle of the gripping portion 20 to the excavated piece being used, depending on the situation.

[0029] Furthermore, the distance between the excavated piece used and the gripping part 20 varies depending on where the gripping part 20 is attached along the length of the side surface 26 of the housing, as shown in Figures 5(a) and (b). Since the attachment position of the gripping part 20 can be freely changed by the user by operating the gripping part attachment member 22, the user can easily optimize the distance between the excavated piece used and the gripping part 20 according to the situation.

[0030] As described above, the hand-operated hole-digging tool 10 has a unique digging section 16 consisting of four digging pieces 24(1) to 24(4), and the user can freely change the positional relationship between each digging piece and the gripping section 20. In addition, it has two types of digging pieces with cutting edges (first and fourth digging pieces 24(1), 24(4)), so the user can select the digging piece with cutting edge to use according to the situation. Therefore, the user can always use the hand-operated hole-digging tool 10 in a state that makes digging holes easy.

[0031] Furthermore, the storage section 18 has a bottomed cylindrical outer shape, and the volume of the storage section 18 can be adjusted by the length of the side surface 26 of the storage section. Therefore, for example, if multiple storage sections 18 are prepared with different lengths of the side surface 26, the storage section 18 with the optimal volume can be selected according to the site conditions. Moreover, changing the storage section 18 has almost no effect on the positional relationship between each excavation piece and the gripping section 20. Thus, a hand-operated hole-digging tool 10 that makes it easy to dig holes and efficiently discharge the excavated material to the surface can be easily obtained.

[0032] Furthermore, it goes without saying that the hand-dug hole-digging tool 10 can be used not only for digging vertical holes but also for digging horizontal holes, and various other uses can be considered besides its original purpose of digging holes. For example, as shown in Figure 6(b), it is very convenient to use it as a substitute for a shovel when removing soil and other debris accumulated in the U-shaped side ditch 44. In addition, it can be used as a ladle for scooping water, or as a measuring cup by utilizing the markings 32.

[0033] It should be noted that the hand-dug hole digging tool of the present invention is not limited to the above embodiments. For example, in the hand-dug hole digging tool 10, two of the four digging pieces 24(1) to 24(4) are digging pieces with cutting edges, but if finishing digging is not required, all of them may be digging pieces with cutting edges. Also, when digging in a place where the soil is soft, all of the digging pieces may be digging pieces without cutting edges.

[0034] The gripping attachment member is not limited to the form of the gripping attachment member 22 described above. When using the gripping attachment member 22, for example, in the state shown in Figure 4(a), the operating knob 42, bolt 38, and the ends 34a, 34b of the band member 34, which are components of the gripping attachment member 22, protrude laterally beyond the third and fourth digging pieces 24(3) and 24(4). This is because the design prioritizes improving the user's operability, such as making it easier to turn the operating knob 42, but as a result, the digging pieces other than the first digging piece 24(1) cannot be used or are difficult to use. However, if the size and shape of the gripping attachment member 22 are changed (within a range that ensures a certain level of operability), and the gripping attachment member is constructed so that it does not protrude laterally beyond the third and fourth digging pieces 24(3) and 24(4), then the third and fourth digging pieces 24(3) and 24(4) can also be used.

[0035] The gripping portion 20 is provided with a flange portion 20a to protect the user's hand, but the flange portion 20a can be omitted if necessary. Furthermore, the gripping portion 20 has a rod-like outer shape and is mounted upright on the outer surface of the housing portion side 26, but it may be changed to a different shape for better usability.

[0036] The storage section 18 has a structure in which one end of the storage section side surface 26 is closed by a flat storage section closing surface 28 positioned almost perpendicular to the longitudinal direction of the storage section side surface 26. When the storage section 18 is placed on a flat surface with the storage section closing surface 26 facing downwards, the storage section 18 can stand on its own. However, the arrangement and shape of the storage section closing surface can be changed as appropriate according to the user's requirements. For example, if it is not necessary for the storage section 18 to stand on its own, the storage section closing surface 28 can be positioned diagonally to the storage section side surface 26, or the storage section closing surface 28 can be made into a non-flat surface that bulges outwards.

[0037] The excavation section 16 of the hand-operated hole-digging tool 10 is formed in a rectangular frame shape by arranging the first to fourth excavation pieces 24(1) to 24(4) in a ring in order, making it suitable for excavating a neat rectangular vertical hole 14. However, when excavating a vertical hole with a pentagonal or circular cross-section, or a vertical hole where the corners where the inner wall surface and the bottom surface intersect do not need to be perfect right angles, the excavation section may be made into an n-sided (n=3,5,6,...) frame shape other than a rectangle, and a similar effect can be obtained. [Explanation of Symbols]

[0038] 10. Hand-dug hole digging tools 16 Excavation Section 18. Detention Unit 20 Gripping part 22 Gripping part mounting member 24(1)~24(4) Excavated pieces 26 Side view of the storage compartment 28. Enclosure surface of the storage area 32 divisions 34 Band members 36 Band tightening / loosening member

Claims

1. The device comprises an excavation section formed in an n-sided frame shape by arranging n excavation pieces (where n is a natural number of 3 or more) in a ring, a storage section for accommodating excavated material that has passed inside the excavation section, and a gripping section attached to the outside of the storage section via a gripping section attachment member. The housing portion has a housing portion side surface on which the excavation portion is continuously formed at one end in the longitudinal direction of the cylindrical outer shape, and a housing portion closing surface that closes the end of the housing portion side surface opposite to the excavation portion. The gripping attachment member comprises a band member fixed to the end of the gripping portion and shaped to surround the outer circumference of the side surface of the housing portion, and a band tightening / loosening member that can tighten or loosen the band member, and the band member can be fixed to the outer circumference of the side surface of the housing portion by tightening the band member with the band tightening / loosening member, and the band member can be released by loosening the band member, characterized in that the band member can be fixed to the outer circumference of the side surface of the housing portion by tightening the band member with the band tightening / loosening member, and the band member can be released by loosening the band member.

2. The manual hole-digging tool according to claim 1, wherein two or more of the n drilling pieces in the drilling section are drilling pieces with multiple cutting edges arranged in parallel.

3. The device comprises an excavation section formed in an n-sided frame shape by arranging n excavation pieces (where n is a natural number of 3 or more) in a ring, a storage section for accommodating excavated material that has passed inside the excavation section, and a gripping section attached to the outside of the storage section. The housing section has a housing section side surface and a housing section closing surface that closes the end of the housing section side surface opposite to the excavation section, The excavation section is characterized in that two or more of the n excavation pieces are excavation pieces with multiple cutting edges arranged in parallel.

4. The manual hole-digging tool according to claim 2 or 3, wherein the two or more cutting edge digging pieces have different shapes, pitches, or both of the multiple cutting edges for each cutting edge digging piece.

5. The excavation section is formed in a rectangular frame shape by arranging four excavation pieces in a ring shape, according to any one of claims 1 to 3.

6. The hole-digging tool for manual digging according to any one of claims 1 to 3, wherein the housing closing surface is provided such that the housing, to which the gripping portion is attached, is placed on a flat surface with the housing closing surface facing downwards, so that the housing can stand on its own.

7. The manual hole-digging tool according to any one of claims 1 to 3, wherein the inner wall surface of the side of the storage section is marked with a scale for measuring the amount of excavated material or other stored material.

8. The gripping portion is attached so as to stand upright on the outer surface of the side of the housing portion, and a flange portion for protecting the user's hand is formed at the end closest to the side of the housing portion, according to any one of claims 1 to 3.

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