Work tool aids and work tools

Abstract

To provide an auxiliary tool for a work tool that enables a user to improve workability and reduce fatigue. [Solution] An auxiliary tool for a work tool including a main body and a rotatable mount holder, wherein the work tool has a working part and a handle part, the main body has a central part where the palm of the user of the work tool auxiliary tool is placed and recesses around the central part into which the user's fingers can be inserted, the recesses including a first recess, a second recess, a third recess, a fourth recess, a fifth recess, and a sixth recess, and the rotatable mount holder has an attachment part that is detachably attached to the handle part of the work tool, and a connection part that is rotatably connected to the attachment part and connected to approximately the center of the main body part.

Description

[Technical Field]

[0001] The present invention relates to an auxiliary tool for a work tool and a work tool. [Background technology]

[0002] BACKGROUND ART Conventionally, work tools have been used that have a working part such as a scoop for scooping snow, a shovel for digging soil, a mop for cleaning, etc., and a handle part connected to the working part, such as a scoop, a blade, or a mop string.

[0003] When using a work tool, the user holds the base end (near side) of the handle with one hand, or if a grip is provided at the base end of the handle, holds the grip, and grips the tip end of the handle with the other hand to perform work. As a result, the other hand gripping the handle is positioned away from the body, causing the user to bend forward, which increases the strain on the user during work.

[0004] For example, if the work tool is a snow shovel, the user's balance can easily be disrupted by the weight of the snow scooped on the scoop. The user's palm, gripping the handle, becomes unstable and requires extra effort to stabilize the tool, which can easily lead to fatigue. Furthermore, users scoop up snow with the scoop and rotate the snow shovel to throw the scooped snow to the side or rear, but rotating the thin handle requires arm strength, making snow removal extremely hard work, especially for women who lack strength.

[0005] Similar problems can also be seen with work tools other than shovels, and occur when digging up gravel or soil using shovels, etc. In addition, when the work tool is a cleaning mop, for example, cleaning is performed by gripping the handle and moving or rotating it, but because the handle is long and rod-shaped, the above work is a heavy burden for elderly people, women, and children who have weak grip strength.

[0006] In addition, snow removal and other tasks may be performed using machinery, but it is difficult to introduce machinery into narrow spaces, and introducing machinery is costly. Therefore, there are many cases where work must be done using simple tools such as shovels. In addition, with the aging population, there are an increasing number of elderly workers not only in snowy regions but also at construction sites.

[0007] Therefore, Patent Document 1 proposes an auxiliary grip that can be attached and detached to a handle of any thickness, can be removed when not needed, and can be fixed in a desired position depending on the user's physique, with the aim of reducing the burden of working with a work tool equipped with a handle.

[0008] This auxiliary grip has a grip portion, arm portions attached to both ends of the grip portion, a tightening portion formed at the tip of the arm portion, and a chuck portion formed at the tip of the tightening portion, and is fixed to the handle portion of the work tool by tightening the tightening portion to narrow the gap between the chuck portions. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-054422 Summary of the Invention [Problem to be solved by the invention]

[0010] However, conventional auxiliary grips such as those disclosed in Patent Document 1 have cylindrical grip portions that can easily cause fatigue for users, and further improvements in workability have been desired.

[0011] Therefore, there is a demand for auxiliary devices for work tools that can improve workability and reduce fatigue. [Means for solving the problem]

[0012] The gist of the present invention is as follows. (1) Main unit and rotating mount holder A work tool auxiliary tool comprising: the work tool has a working portion and a handle portion; The main body portion includes a central portion on which the palm of a user of the work tool auxiliary is placed and a recessed portion around the central portion into which the user's fingers can be inserted, the recesses include a first recess, a second recess, a third recess, a fourth recess, a fifth recess, and a sixth recess; The rotary mount holder has an attachment portion that is detachably attached to a handle portion of the work tool, and a connection portion that is rotatably connected to the attachment portion and is connected to approximately the center of the main body portion. Auxiliary equipment for work tools. (2) The auxiliary tool for a work tool according to (1) above, wherein the angle between the first recess and the second recess with respect to the approximate center of the main body and the angle between the first recess and the sixth recess with respect to the approximate center of the main body are greater than the angle between the second recess and the third recess with respect to the approximate center of the main body, the angle between the third recess and the fourth recess with respect to the approximate center of the main body, the angle between the fourth recess and the fifth recess with respect to the approximate center of the main body, and the angle between the fifth recess and the sixth recess with respect to the approximate center of the main body. (3) An auxiliary tool for a work tool according to (1) or (2) above, wherein the angle formed by the first recess and the second recess with respect to the approximate center of the main body portion and the angle formed by the first recess and the sixth recess with respect to the approximate center of the main body portion are substantially the same. (4) An auxiliary tool for a work tool according to any one of (1) to (3) above, wherein the angle between the second recess and the third recess with respect to approximately the center of the main body, the angle between the third recess and the fourth recess with respect to approximately the center of the main body, the angle between the fourth recess and the fifth recess with respect to approximately the center of the main body, and the angle between the fifth recess and the sixth recess with respect to approximately the center of the main body are substantially the same. (5) The auxiliary tool for a work tool according to any one of (1) to (4) above, wherein the width of the first recess is wider than the widths of the second recess, the third recess, the fourth recess, the fifth recess, and the sixth recess. (6) The auxiliary tool for a work tool according to any one of (1) to (5) above, wherein the work tool is a gardening tool, a farm tool, or a cleaning tool. (7) The auxiliary tool for a work tool according to any one of (1) to (6) above, wherein the work tool is a shovel or a shovel. (8) A work tool equipped with the work tool auxiliary tool described in any one of (1) to (7) above. [Effects of the Invention]

[0013] According to the present invention, it is possible to improve the workability of the user and reduce fatigue. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic front view of the main body 10. As shown in FIG. [Figure 2] FIG. 2 is a schematic diagram of the main body 10 and the rotary mount holder 20 rotatably connected to the approximate center of the main body 10 when viewed from the back side of FIG. [Figure 3] FIG. 3 is a schematic side view of the main body 10 and the rotary mount holder 20 rotatably connected to approximately the center of the main body. [Figure 4] FIG. 4 is a photograph showing the appearance of the work tool 90 with the work tool auxiliary tool 100 attached to the handle 92. [Figure 5] FIG. 5 is a schematic diagram of an example in which the attachment position of the work tool auxiliary tool 100 is changed from the state in FIG. 4 to the tip end side of the handle. [Figure 6] FIG. 6 is a schematic diagram of an example in which the attachment position of the work tool auxiliary tool 100 is changed from the state in FIG. 4 to the rear side of the handle. [Figure 7] FIG. 7 is a schematic diagram of the state in which the main body 10 is rotated so that the recess is positioned at an angle that allows the user to easily grip the main body 10 with the right hand, as illustrated in FIG. [Figure 8]FIG. 8 is a schematic diagram showing a state in which the main body 10 is rotated so that the recess is positioned at an angle intermediate between that shown in FIG. 7 and that shown in FIG. [Figure 9] FIG. 9 is a schematic diagram of the state in which the main body 10 is rotated so that the recess is positioned at an angle that allows the user to easily grip the main body 10 with the left hand, as illustrated in FIG. [Figure 10] FIG. 10 is a schematic diagram showing a user handling a shovel as a work tool 90 by gripping the main body of the work tool auxiliary device 100 attached to the handle with the right hand. [Figure 11] FIG. 11 is an enlarged schematic view showing a user gripping the main body of the work tool auxiliary tool 100 attached to the handle with the right hand. [Figure 12] FIG. 12 is a schematic diagram showing a user handling a shovel as a work tool 90 by gripping the main body of the work tool auxiliary device 100 attached to the handle with the left hand. [Figure 13] FIG. 13 is an enlarged schematic diagram showing a user gripping the main body of the work tool auxiliary tool 100 attached to the handle with the left hand. [Figure 14] FIG. 14 shows an example in which the diameter of the central portion is 60 to 85 mm and the diameter of the main body portion is 100 to 130 mm. [Figure 15] FIG. 15 is an example where the central portion has a diameter of 85 mm and the main body portion has a diameter of 100 mm. DETAILED DESCRIPTION OF THE INVENTION

[0015] The present disclosure relates to an auxiliary tool for a work tool including a main body and a rotatable mount holder, wherein the work tool has a working part and a handle, the main body has a central part on which the palm of a user of the work tool is placed and recesses around the central part into which the user's fingers can be inserted, the recesses including a first recess, a second recess, a third recess, a fourth recess, a fifth recess, and a sixth recess, and the rotatable mount holder has an attachment part that is detachably attached to the handle of the work tool and a connection part that is rotatably connected to the attachment part and connected to approximately the center of the main body. This auxiliary tool for a work tool is easy to grip, allowing for improved workability and reduced fatigue for the user.

[0016] The following description will be made with reference to the drawings. Fig. 1 shows a schematic front view of the main body 10. Fig. 2 shows a schematic view of the main body 10 and the rotatable mount holder 20 rotatably connected to approximately the center of the main body 10 as viewed from the back of Fig. 1. Fig. 3 shows a schematic side view of the main body 10 and the rotatable mount holder 20 rotatably connected to approximately the center of the main body 10. In Figs. 2 and 3, the attachment portion 21 of the rotatable mount holder 20 is open.

[0017] 4 shows a photograph of the appearance of a work tool 90 with the work tool auxiliary device 100 attached to a handle 92. The work tool 90 shown in FIG. 4 is a shovel.

[0018] The main body 10 includes a central portion 11, indicated by a dashed line, on which the palm of the user of the work tool auxiliary device 100 (hereinafter simply referred to as the user) rests, and recesses around the central portion 11 into which the user's fingers can be inserted. The recesses include at least a first recess 31, a second recess 32, a third recess 33, a fourth recess 34, a fifth recess 35, and a sixth recess 36. The recesses may further include a seventh recess, or may have seventh and eighth recesses, but preferably consist of the six recesses described above. Providing six recesses through which fingers can be inserted allows for easy gripping of the main body 10, accommodating different holding styles for right-handed or left-handed users, regardless of whether they use a right-handed or left-handed hand, or a forward-handed or backward-handed hand. The recesses preferably have chamfered corners for easier gripping.

[0019] A user can grip the main body 10 by inserting their fingers into five of the at least six recesses. This makes it easy for the user to grip the main body 10. Because the main body 10 has at least six recesses for five fingers, it can accommodate different gripping styles depending on whether the user is right-handed or left-handed, and is easy to grip for both right-handed and left-handed users.

[0020] The work tool auxiliary tool 100 is attached to the center or tip end of the handle 92 of the work tool 90, and can be used by the user holding the main body 10 of the work tool auxiliary tool 100 attached to the handle 92 with one hand and holding the handle 92 near the base end (the end opposite the tip end) or the grip 94 provided at the base end with the other hand. The grip can have a Y shape as shown in FIG. 4.

[0021] Fig. 10 is a schematic diagram showing a user gripping the main body of the work tool auxiliary tool 100 attached to the handle 92 with the right hand to handle the shovel of the work tool 90. Fig. 11 is an enlarged schematic diagram showing a user gripping the main body of the work tool auxiliary tool 100 attached to the handle with the right hand.

[0022] Fig. 12 is a schematic diagram showing a user gripping the main body of the work tool auxiliary tool 100 attached to the handle with the left hand to handle the shovel of the work tool 90. Fig. 13 is an enlarged schematic diagram showing a user gripping the main body of the work tool auxiliary tool 100 attached to the handle with the left hand.

[0023] As shown in Figs. 10 to 13, the main body of the work tool auxiliary tool 100 can be easily gripped with either the right or left hand, making it easy for both right-handed and left-handed people to grip.

[0024] As illustrated in Figures 2 and 3, the rotatable mount holder 20 has an attachment portion 21 that is detachably attached to the handle portion of the work tool, and a connection portion 22 that is rotatably connected to the attachment portion 21 and connected to approximately the center of the main body portion 10.

[0025] The connecting portion 22 can be fixed and connected to approximately the center of the main body portion 10. There are no particular limitations on the method for fixing the connecting portion 22 to the main body portion 10, and fixing using screws, adhesive, etc. is possible, but preferably the connecting portion 22 has a threaded portion, and the threaded portion (male thread) of the connecting portion 22 is screwed into a screw hole provided in approximately the center of the main body portion 10, or the threaded portion (male thread) provided in approximately the center of the main body portion 10 is screwed into a screw hole provided in the connecting portion 22. This can improve the connection strength between the connecting portion 22 and the main body portion 10.

[0026] 3, the connecting portion 22 may have a rotating connection portion and may be rotatably connected to the mounting portion 21. The rotating connection portion includes a rotating mechanism such as a rotating shaft and a bearing, and rotatably connects the main body portion 10 to the mounting portion 21.

[0027] Since the connecting portion 22 can be rotatably connected to the mounting portion 21, the main body 10 can rotate about a rotation axis located substantially at the center. That is, the main body 10 can rotate in a direction within a plane substantially parallel to the handle portion.

[0028] 7 to 9 show an example of a main body 10 having six recesses, rotated around the approximate center of the main body 10 to change the positions of the recesses. As illustrated in FIGS. 7 to 9, a user can insert their fingers into the recesses and rotate the main body 10 to a position that is easy to grip. FIG. 7 is a schematic diagram of a state in which the main body 10 has been rotated so that the recesses are positioned at an angle that makes it easy for a user to grip the main body 10 with their right hand, as illustrated in FIG. 10. FIG. 9 is a schematic diagram of a state in which the main body 10 has been rotated so that the recesses are positioned at an angle that makes it easy for a user to grip the main body 10 with their left hand, as illustrated in FIG. 12. FIG. 8 is a schematic diagram of a state in which the main body 10 has been rotated so that the recesses are positioned at an angle intermediate between those illustrated in FIGS. 7 and 9. In this way, a user can grip the main body 10 by rotating the main body 10 so that at least six recesses are positioned at an angle that makes it easy to grip.

[0029] The structure of the mounting portion of the rotary mount holder is not particularly limited as long as it has a mounting portion that can be detachably attached to the handle of the work tool and a connection portion that is rotatably connected to the mounting portion and connected to approximately the center of the main body portion. An example of the structure will be described with reference to Figures 2 and 3.

[0030] As illustrated in FIGS. 2 and 3 , the mounting portion 21 has a clamp structure and may include an open-close portion 211. The open-close portion 211 may include a groove 212 into which a screw 214 on a base portion 213 can be inserted by tilting it approximately 90 degrees. The base portion 213 may include a screw 214 that can open and close the mounting portion 21. The screw 214 is connected to the base portion 213 so that it can rotate approximately 90 degrees around a fulcrum near the tip of the base portion 213. The base portion 213 may be integral with the connecting portion 22 and may include part or all of the above-mentioned rotating connecting portion. The open-close portion 211 and the base portion 213 may include a hinge portion that functions as a clamp hinge. The connecting portion 22 may include part or all of the above-mentioned rotating connecting portion as an integral part. By inserting the screw 214 into the groove 212 and rotating it to tighten, the open-close portion 211 and the base portion 213 are fastened together, and the mounting portion 21 can be fixed to the handle portion. The mounting portion 21 may include a lever lock mechanism.

[0031] The inner surface of the mounting part 21 to which the handle is fixed preferably has a substantially circular shape to facilitate fixing of the cylindrical handle. The inner surface of the mounting part 21 to which the handle is fixed may have an internal lining to increase friction. This allows the mounting part 21 to be fixed without damaging the handle.

[0032] The attachment position of the work tool auxiliary tool 100 to the handle 92 can be easily changed by opening the opening / closing part 211 of the attachment part 21. An example in which the attachment position of the work tool auxiliary tool 100 has been changed from the state in FIG. 4 to the tip side of the handle 92 is shown in FIG.

[0033] The work tool auxiliary tool 100 can be used with either a right-handed or left-handed grip. Figure 4 shows the state in which it is used with a right-handed grip, and Figure 6 shows the state in which it is used with a left-handed grip. By changing the attachment direction of the work tool auxiliary tool 100 to the handle portion 92, it can be used in either a right-handed or left-handed grip. The attachment direction of the work tool auxiliary tool 100 to the handle portion 92 can be easily changed by opening the opening / closing portion 211 of the attachment portion 21.

[0034] The main body 10 is not particularly limited as long as it is made of a material strong enough to withstand the work load of the work tool 90 to which the work tool auxiliary device 100 is attached, and may be made of, for example, metal, wood, plastic, or a combination thereof. The main body 10 is preferably made of a material containing polyethylene. Polyethylene is preferable because it is lightweight and has a brittle temperature of minus 40 degrees Celsius, making it less likely to lose strength even in cold climates.

[0035] Preferably, the angle α1 between the first recess 31 and the second recess 32 relative to approximately the center of the main body portion 10 and the angle α6 between the first recess 31 and the sixth recess 36 relative to approximately the center of the main body portion 10 are greater than the angle α2 between the second recess 32 and the third recess 33 relative to approximately the center of the main body portion 10, the angle α3 between the third recess and the fourth recess relative to approximately the center of the main body portion 10, the angle α4 between the fourth recess 34 and the fifth recess 35 relative to approximately the center of the main body portion 10, and the angle α5 between the fifth recess 35 and the sixth recess 36 relative to approximately the center of the main body portion 10.

[0036] Since the main body 10 has six recesses positioned at the above-described preferred angles, the user can easily grip the main body 10 by placing the thumb in the first recess 31 and the index finger or little finger in the second recess 32 and the sixth recess 36. This makes it easier for the user to grip the main body 10 and to grip the main body 10 more firmly regardless of whether the user is right-handed or left-handed, thereby enabling further improvement in workability and further reduction in fatigue.

[0037] It is preferable that central portion 11 has a size that allows it to be grasped with the second joints of the user's index finger, middle finger, ring finger, and little finger. By making central portion 11 large enough to be grasped with the second joints, the user can hold main body portion 10 stably with a large grip.

[0038] Central portion 11 preferably has a diameter of 50 to 95 mm, even more preferably 55 to 90 mm, and even more preferably 60 to 85 mm. FIG. 14 shows an example in which central portion 11 has a diameter of 60 to 85 mm. FIG. 15 shows an example in which central portion 11 has a diameter of 85 mm. According to the AIST Japanese hand size data (URL: https: / / www.airc.aist.go.jp / dhrt / hand / data / list.html), the average palm size of Japanese people is 105.6 mm for men and 96.5 mm for women, with an average value of approximately 102.1 mm. By having central portion 11 within this preferred size range, users of all ages and genders can grip main body 10 stably and with a strong grip.

[0039] The main body 10 may have a diameter of, for example, 100 to 130 mm. Fig. 14 shows an example where the main body 10 has a diameter of 100 to 130 mm. Fig. 15 shows an example where the main body 10 has a diameter of 100 mm.

[0040] Preferably, the angle α1 formed between the first recess 31 and the second recess 32 with respect to the approximate center of the main body 10 and the angle α6 formed between the first recess 31 and the sixth recess 36 with respect to the approximate center of the main body 10 are substantially the same. A user can grip the main body 10 by inserting their thumb into the first recess 31 and their index finger into the recess of the second recess 32 or the sixth recess 36. Since the angle α1 formed between the first recess 31 and the second recess 32 with respect to the approximate center of the main body 10 and the angle α6 formed between the first recess 31 and the sixth recess 36 with respect to the approximate center of the main body 10 are substantially the same, users can grip the main body 10 more firmly regardless of whether they are right-handed or left-handed.

[0041] Preferably, the angle α2 between the second recess 32 and the third recess 33 with respect to the approximate center of the main body 10, the angle α3 between the third recess 33 and the fourth recess 34 with respect to the approximate center of the main body 10, the angle α4 between the fourth recess 34 and the fifth recess 35 with respect to the approximate center of the main body 10, and the angle α5 between the fifth recess 35 and the sixth recess 36 with respect to the approximate center of the main body 10 are substantially equal. A user can grip the main body 10 by inserting their index finger, middle finger, ring finger, and little finger into four of the five recesses, the second recess 32, the third recess 33, the fourth recess 34, the fifth recess 35, and the sixth recess 36. This allows users, whether right-handed or left-handed, to grip the main body 10 more firmly.

[0042] The width of the recess is preferably 15 to 35 mm or 20 to 30 mm. When the width of the recess is within the above-mentioned preferred range, the user can easily insert and remove their fingers into the recess even while wearing gloves such as work gloves or snow gloves, and can more firmly grip the central portion 11. The width of the recess is the average width of each recess.

[0043] Preferably, the width of the first recess 31 is wider than the second recess 32, the third recess 33, the fourth recess 34, the fifth recess 35, and the sixth recess 36. This allows the user to place their thumb in the first recess 31 and grip the main body 10 more firmly.

[0044] The depth of the recess is preferably 4 to 45 mm, 6 to 35 mm, 8 to 25 mm, or 10 to 20 mm. When the depth of the recess is within the above-mentioned preferred range, the user can easily insert and remove their fingers into the recess, even while wearing gloves such as work gloves or snow gloves, and can more firmly grip the central portion 11. The depth of the recess is the difference between the dimensions of the main body portion 10 and the central portion 11.

[0045] The main body 10 may be a flat plate having a thickness of about 5 to 20 mm or 10 to 15 mm, as exemplified in Figures 1 to 9, and the central portion 11 of the main body 10 may have a convex or concave shape, but preferably the central portion 11 has a convex shape so that it is easy to grip.

[0046] As illustrated in Figures 1 to 9, the work tool auxiliary device 100 is palm-sized or smaller, making it easy to store when removed from the handle, and does not interfere with storing the work tool when attached to the handle.

[0047] The work tool 90 with which the work tool auxiliary device 100 is used has a working part 91 and a handle 92. The working part 91 can be a scoop, a blade, a cutting edge, a mop string, a cutter, or the like. The working part 91 is, for example, the scoop, cutting edge, or blade of a shovel, the scoop, cutting edge, or blade of a mop, the mop string of a mop, the cutting edge (cutter) of a grass cutter, or the cutting edge (cutter) of a pole pruner. The above-mentioned working parts, such as the scoop, cutting edge, or blade, are made of a conventionally used material, for example, steel plate. The handle 92 can be connected to the working part 91, but other members may be included between the handle 92 and the working part 91.

[0048] The handle 92 is made of a pipe made of a conventional material, such as wood, structural steel, stainless steel, aluminum, or resin.

[0049] The work tool 90 is not particularly limited as long as it has a working part 91 and a handle part 92, and can be a shovel, spade, mop, pole pruner, lawnmower, etc. The shovel can be a snow shovel, snow blower, snow russel, sharp-angled shovel, sword shovel, square shovel, etc. The shovel can be a slotted shovel, square shovel, etc.

[0050] The work tool 90 is preferably a gardening tool, a farming tool, or a cleaning tool. By attaching the work tool auxiliary device 100 to the handle of such a work tool, the workload of gardening, farming, or cleaning can be reduced.

[0051] The work tool 90 is preferably a shovel or a shovel. By attaching the work tool auxiliary device 100 to the handle of such a work tool, the workload when using a shovel or a shovel with a relatively large mass of material to be excavated, such as snow or soil, can be reduced. In this application, regardless of size, as defined in the Japanese Industrial Standard "JIS A 8902 Shovels and Scoops," a shovel is defined as a tool with a foot rest on the spoon, and a shovel is defined as a tool without a foot rest on the spoon. A shovel includes a spoon, which is the tip used to scoop up soil and sand, a handle at the end, and a handle between the spoon and the handle.

[0052] The present disclosure is also directed to a work tool 90 equipped with the work tool accessory 100 described above. [Explanation of symbols]

[0053] 100 Work tool auxiliary equipment 10 Main body 11 Central part 20 Rotating Mount Holder 21 Mounting part 211 Opening and closing section 212 Groove 213 Base 214 Screw 22 Connection 31 First recess 32 Second recess 33 Third Recess 34 Fourth Recess 35 Fifth Recess 36 Sixth Recess 90 Work Tools 91 Working Section 92 Handle

Claims

1. Main body and rotating mount holder A work tool auxiliary tool comprising: the work tool has a working portion and a handle portion; The overall shape of the main body is a substantially plate-like disk shape, and the main body has a central portion on which the palm of a user of the work tool auxiliary is placed and a recess around the central portion into which the user's fingers can be inserted, the recesses include a first recess, a second recess, a third recess, a fourth recess, a fifth recess, and a sixth recess; The rotary mount holder has an attachment portion that is detachably attached to a handle portion of the work tool, and a connection portion that is rotatably connected to the attachment portion and is connected to approximately the center of the main body portion. Auxiliary equipment for work tools.

2. 2. The auxiliary device for a work tool according to claim 1, wherein an angle formed between the first recess and the second recess and an angle formed between the first recess and the sixth recess with respect to approximately the center of the main body are greater than an angle formed between the second recess and the third recess with respect to approximately the center of the main body, an angle formed between the third recess and the fourth recess with respect to approximately the center of the main body, an angle formed between the fourth recess and the fifth recess with respect to approximately the center of the main body, and an angle formed between the fifth recess and the sixth recess with respect to approximately the center of the main body.

3. 3. The work tool auxiliary according to claim 2, wherein an angle formed by the first recess and the second recess with respect to the approximate center of the main body portion and an angle formed by the first recess and the sixth recess with respect to the approximate center of the main body portion are substantially the same.

4. 3. The auxiliary device for a work tool according to claim 2, wherein an angle formed by the second recess and the third recess with respect to approximately the center of the main body portion, an angle formed by the third recess and the fourth recess with respect to approximately the center of the main body portion, an angle formed by the fourth recess and the fifth recess with respect to approximately the center of the main body portion, and an angle formed by the fifth recess and the sixth recess with respect to approximately the center of the main body portion are substantially the same.

5. The work tool auxiliary according to claim 2 , wherein the first recess is wider than the second recess, the third recess, the fourth recess, the fifth recess, and the sixth recess.

6. The work tool auxiliary device according to claim 1 , wherein the work tool is a gardening tool, a farm tool, or a cleaning tool.

7. The work tool auxiliary device according to claim 1 , wherein the work tool is a shovel or a shovel.

8. A work tool comprising the work tool auxiliary device according to any one of claims 1 to 7.

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