Peg

Abstract

To provide a peg hard to come off from the ground.SOLUTION: A peg 1 includes, on a first surface 13 side, an R part 33 that is curved so as to be recessed inward from the tip side of a first protruding part 7a of a head 7 to the rear end side of a central part 3. Further, the first surface 13 is provided with a planar-shaped first plane part S1 between the tip part 5 and the R part 33, and a second surface 17 is provided with a planar-shaped second plane part S2 on the rear end side of the tip part 5. In addition, a first recess 47 recessed to the axis O side is provided between the tip part 5 and the first plane part S1, and a second recess 43 recessed to the axis O side is provided on the rear end side of the second plane part S2. Further, in the axial direction, the first plane part S1 is disposed more laterally than the second plane part S2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a peg used to fasten an object to the ground. [Background technology]

[0002] 2. Description of the Related Art Conventionally, elongated pegs made of metal or the like have been used as tools for fastening articles (i.e., objects to be fastened) such as tents, sunshades, and tarps to the ground. Known examples of such pegs include rod-shaped pegs with a sharpened tip. Also known are rod-shaped pegs with a head portion at the rear end for hitting with a hammer and a hook portion near the head for hooking a rope extending from a fixed object such as a tent (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-24325 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, with conventional pegs, the rod-shaped part is driven into the ground to secure it, so there was a problem that if force was applied to the peg in the direction opposite to the direction in which it was driven (i.e., if force was applied in the direction of pulling the peg out), the peg would easily come out of the ground.

[0005] One aspect of the present disclosure is to provide a peg that is less likely to fall out of the ground. [Means for solving the problem]

[0006] (1) One aspect of the present disclosure relates to a peg used to fix an object to the ground. The peg has a long shape extending in the axial direction, and includes a columnar central portion having a first surface and a second surface extending parallel to the axial direction and facing each other, a tip portion provided at the tip side of the central portion and having a pointed shape toward the tip side, and a head portion provided at the rear end side of the central portion and receiving an external impact when the peg is driven into the ground. The head portion has a protruding portion on the first surface side that protrudes away from the axis from the first surface, and includes a hook portion for hooking an extension portion extending from the object to be fixed. On the first surface side, the protruding portion of the head portion includes an R portion that curves inwardly from a portion on the tip side of the hook portion to the rear end side of the central portion. On the first surface, the peg includes a first planar portion having a planar shape between the tip portion and the R portion, and on the second surface, the head includes a second planar portion having a planar shape on the rear end side of the tip portion. The first surface has a first recess recessed toward the axial direction between the tip portion and the first flat surface, and the second surface has a second recess recessed toward the axial direction rearward from the second flat surface. The first flat surface is shifted toward the rearward from the second flat surface in the axial direction.

[0007] In the present disclosure, with such a configuration, when the peg is driven into the ground, the leading end of the peg rotates toward the first surface and the trailing end of the peg rotates toward the second surface. That is, the peg rotates, for example, in the left rotation direction of FIG. 1(b). As a result, soil enters the first recess of the first surface and the second recess of the second surface, making it difficult for the peg to come out.

[0008] (2) Another aspect of the present disclosure relates to a peg used to fix an object to the ground. The peg has a long shape extending in the axial direction, and includes a columnar central portion having a first surface and a second surface extending parallel to the axial direction and facing each other, a tip portion provided on the tip side of the central portion and having a pointed shape toward the tip side, and a head portion provided on the rear end side of the central portion and receiving an external impact when the peg is driven into the ground. The head portion has a protruding portion on the first surface side that protrudes away from the axis from the first surface, and includes a hook portion for hooking an extension portion extending from the object to be fixed. On the first surface side, the protruding portion of the head portion includes an R portion that curves inwardly from a portion on the tip side of the hook portion to the rear end side of the central portion. On the first surface, the peg includes a first planar portion between the tip portion and the R portion, and on the second surface, the head includes a second planar portion on the rear end side of the tip portion. The first surface has a first recess recessed toward the axial direction between the tip portion and the first flat surface, or the second surface has a second recess recessed toward the axial direction rearward from the second flat surface. The first flat surface is shifted toward the rearward from the second flat surface in the axial direction.

[0009] In the present disclosure, the peg is provided with either the first recess or the second recess. With this configuration, when the peg is driven into the ground, the tip end of the peg rotates toward the first surface and the rear end of the peg rotates toward the second surface. In other words, the peg rotates, for example, in the left rotation direction of FIG. 1(b). As a result, soil enters the first recess on the first surface or the second recess on the second surface, making it difficult for the peg to come out.

[0010] (3) Another aspect of the present disclosure relates to a peg used to fix an object to the ground. The peg has a long shape extending in the axial direction, and includes a columnar central portion having a first surface and a second surface extending parallel to the axial direction and facing each other, a tip portion provided on the tip side of the central portion and having a pointed shape toward the tip side, and a head portion provided on the rear end side of the central portion and receiving an external impact when the peg is driven into the ground. The head portion has a protruding portion on the first surface side that protrudes away from the axis from the first surface, and includes a hook portion for hooking an extension portion extending from the object to be fixed. On the first surface side, the protruding portion of the head portion includes an R portion that curves inwardly from a portion on the tip side of the hook portion to the rear end side of the central portion. On the first surface, the peg includes a first planar portion having a planar shape between the tip portion and the R portion, and on the second surface, the head includes a second planar portion having a planar shape on the rear end side of the tip portion. The first surface is provided with a first convex portion protruding in the opposite direction to the axis between the tip portion and the first flat surface, and the second surface is provided with a second convex portion protruding in the opposite direction to the axis from the second flat surface toward the rear end. The first flat surface is positioned offset toward the rear end from the second flat surface in the axial direction.

[0011] In the present disclosure, with such a configuration, when the peg is driven into the ground, the leading end of the peg rotates toward the first surface, and the trailing end of the peg rotates toward the second surface. That is, the peg rotates, for example, in the left rotation direction of FIG. 6(b). As a result, the first convex portion of the first surface is sufficiently embedded in the soil, and the second convex portion of the second surface is sufficiently embedded in the soil, so that the peg is not easily pulled out.

[0012] (4) Another aspect of the present disclosure relates to a peg used to fix an object to the ground. The peg has a long shape extending in the axial direction, and includes a columnar central portion having a first surface and a second surface extending parallel to the axial direction and facing each other, a tip portion provided on the tip side of the central portion and having a pointed shape toward the tip side, and a head portion provided on the rear end side of the central portion and receiving an external impact when the peg is driven into the ground. The head portion has a protruding portion on the first surface side that protrudes away from the axis from the first surface, and includes a hook portion for hooking an extension portion extending from the object to be fixed. On the first surface side, the protruding portion of the head portion includes an R portion that curves inwardly from a portion on the tip side of the hook portion to the rear end side of the central portion. On the first surface, the peg includes a first planar portion between the tip portion and the R portion, and on the second surface, the head includes a second planar portion on the rear end side of the tip portion. The first surface is provided with a first convex portion protruding in the opposite direction to the axis between the tip portion and the first flat surface, or the second surface is provided with a second convex portion protruding in the opposite direction to the axis from the second flat surface toward the rear end. The first flat surface is disposed offset toward the rear end from the second flat surface in the axial direction.

[0013] In the present disclosure, the peg is provided with either a first convex portion or a second convex portion. With this configuration, when the peg is driven into the ground, the tip end of the peg rotates toward the first surface side, and the rear end of the peg rotates toward the second surface side. In other words, the peg rotates, for example, in the left rotation direction of FIG. 6(b). As a result, the first convex portion on the first surface or the second convex portion on the second surface is sufficiently embedded in the soil, making it difficult for the peg to come out.

[0014] In the present disclosure described above, the tip side refers to one side in the axial direction (i.e., the side with the pointed tip), and the rear side refers to the other side opposite to the one side in the axial direction (i.e., the head side). Also, when "the first flat surface portion is positioned shifted rearward from the second flat surface portion", at least the tip side of the first flat surface portion is located rearward from the tip side of the second flat surface portion. [Brief description of the drawings]

[0015] [Figure 1] (a) is a left side view of the peg of the first embodiment, (b) is a front view of the peg, and (c) is a right side view of the peg. [Diagram 2] (a) is a cross-sectional view showing the D1-D1 cross-section of FIG. 1(a), (b) is a cross-sectional view showing the D2-D2 cross-section of FIG. 1(c), (c) is a cross-sectional view showing the D3-D3 cross-section of FIG. 1(c), (d) is a cross-sectional view showing the D4-D4 cross-section of FIG. 1(a), (e) is a cross-sectional view showing the D5-D5 cross-section of FIG. 1(a), and (f) is a cross-sectional view showing the D6-D6 cross-section of FIG. 1(c). [Diagram 3] It is an explanatory diagram showing the procedure for driving the peg of the first embodiment. [Figure 4] It is an explanatory diagram showing the procedure for pulling out the peg of the first embodiment. [Diagram 5] (a) is a front view showing a modified example of the peg of the first embodiment, and (b) is a front view showing another modified example of the peg. [Figure 6] (a) is a left side view of the peg of the second embodiment, (b) is a front view of the peg, and (c) is a right side view of the peg. [Figure 7] (a) is a left side view showing a part of the rear end side of a modified example of the peg of the second embodiment, (b) is a front view showing a part of the rear end side of the modified example, (c) is a right side view showing a part of the front end side of the modified example, (d) is a front view showing a part of the front end side of the modified example, (e) is a left side view showing a part of the rear end side of another modified example of the peg, (f) is a front view showing a part of the rear end side of the other modified example, (g) is a right side view showing a part of the front end side of the other modified example, and (h) is a front view showing a part of the front end side of the other modified example.

MODE FOR CARRYING OUT THE INVENTION

[0016] Hereinafter, exemplary embodiments of the present disclosure will be described with reference to the drawings. [1. First Embodiment] [1-1. Configuration] As shown in Fig. 1, the peg 1 of the first embodiment is a tool used to fix an object to the ground, and is a long stake extending in the axial direction (the direction of the axis O). In other words, it is a plate-like tool having a predetermined thickness. As is well known, the peg 1 can be manufactured by casting using a metal material such as an Mg-based alloy.

[0017] In the following, explanations will be given using ZYX coordinates, which are three-dimensional orthogonal coordinates. The Z-axis direction is the axial direction, the Y-axis direction is the width direction, and the X-axis direction is the thickness direction. The lower side of Fig. 1 is the tip side in the Z-axis direction, and the upper side is the rear end side in the Z-axis direction. The right side of Fig. 1(b) is the right side in the Y-axis direction (the first surface 13 side), and the left side of Fig. 1(b) is the left side in the Y-axis direction (the second surface 17 side parallel to the first surface 13). The right side of Fig. 1(a) is the right side in the X-axis direction, and the left side of Fig. 1(a) is the left side in the X-axis direction.

[0018] As shown in Fig. 1, the peg 1 has a square prism-shaped central portion 3, a tip portion 5 provided on the tip side of the central portion 3, and a head portion 7 provided on the rear side of the central portion 3. Each component will be described below.

[0019] <Head> As shown in Fig. 1(b), the head portion 7 is a plate-like portion that is struck with a hammer or the like when driving the peg 1 into the ground, and it protrudes toward the rear end side from the central portion 3 and also protrudes on both sides in the width direction (Y-axis direction) from the central portion 3. Note that, of the head portion 7, the portion that protrudes to the right in Fig. 1(b) is referred to as a first protruding portion 7a, and the portion that protrudes to the left in the same figure is referred to as a second protruding portion 7b.

[0020] A first impact part 11 having a flat shape that is perpendicular to the axial direction and extends in the width direction is provided at the rear end of the head part 7 in the axial direction. As described later, this first impact part 11 is a part that is struck with a hammer or the like when driving the peg 1 into the ground.

[0021] A hook portion 15 is provided on the first protruding portion 7a of the head portion 7. More specifically, on one side in the width direction of the head portion 7 (the right side in FIG. 1(b)), i.e., on the first surface 13 side that is closer to the ground when the peg 1 is driven diagonally into the ground, the hook portion 15 is provided for hanging a rope RP extending from an object to be fixed, such as a tent.

[0022] The hook portion 15 is a recess extending from the upper left to the lower right in FIG. 1(b) and opening diagonally downward to the right, with the space becoming larger toward the opening side. A second striking portion 19 is provided on the second protruding portion 7b of the head 7. More specifically, the other widthwise side of the head 7 (the left side in FIG. 1(b)), i.e., the second surface 17 side (the side opposite the first surface 13) that is farther from the ground when the peg 1 is driven diagonally into the ground, is provided with the flat second striking portion 19 that is used when removing the peg 1 from the ground.

[0023] The second impact portion 19 is inclined at a predetermined angle with respect to the axial direction, extending from the upper right to the lower left in Fig. 1(b) at an angle of 45°±5°, for example. In addition, a protrusion 20 is provided on the second surface 17 side of the second striking portion 19 (the left side in Figure 1 (b)), and the protrusion 20 protrudes in the same direction as the extension direction of the second striking portion 19.

[0024] <Tip> 1(b) and the like, the tip portion 5 is formed so that the outer diameter becomes thinner toward the tip side. In other words, the diameter dimension from the axis O becomes smaller toward the tip side, and therefore the cross-sectional area in a cross section perpendicular to the axial direction becomes smaller.

[0025] As shown in FIG. 1(a), the region on the second surface 17 side of the tip portion 5 indicated by the diagonal dashed line extends from the rear end side to the tip end side and has a shape in which both the left and right sides are scraped off in the thickness direction (X-axis direction).

[0026] In other words, as shown in the cross section in Figure 2(a) (cross section D1-D1 in Figure 1(a)), the second surface 17 side of the tip portion 5 is formed into a mountain shape (convex shape) protruding toward the second surface 17 side, as if the left and right sides were cut diagonally (i.e., as if cut in a tapered shape).

[0027] The protruding ridgeline extends along the axial direction when viewed from the second surface 17. Hereinafter, the portion of the mountain-shaped cross section that extends along the ridgeline will be referred to as the blade portion. Hereinafter, the blade portion on the second surface 17 side of the tip portion 5 will be referred to as the first blade portion H1. The first blade portion H1 is formed up to a part of the tip side of the central portion 3.

[0028] As shown in FIG. 1(c), like the first blade portion H1, the area on the first surface 13 side of the tip portion 5 indicated by dots extends from the rear end side to the tip end side and has a tapered shape with both the left and right sides cut diagonally in the thickness direction.

[0029] That is, as shown in the cross section in Fig. 2(b) (cross section taken along D2-D2 in Fig. 1(c)), the first surface 13 side of the tip portion 5 has a mountain shape with the central portion 29 protruding toward the first surface 13 side. That is, a second blade-shaped portion H2 similar to the first blade-shaped portion H1 is provided on the first surface 13 side of the tip portion 5. The first blade-shaped portion H1 is formed up to a part of the tip side of the central portion 3.

[0030] <Central part> As shown in FIG. 1, the central portion 3 is a columnar member (i.e., a rectangular prism member) having a rectangular (e.g., square) cross-sectional shape perpendicular to the axial direction, and the axis O passes through the center of gravity of the rectangle and the tip of the tip portion 5.

[0031] As shown in FIG. 1(b), a smoothly curved R portion 33 is provided from the rear end side of the central portion 3 to the tip side of the first protruding portion 7a of the head portion 7. In other words, the first protruding portion 7a of the head portion 7 protrudes significantly to the right side of FIG. 1(b) from the position of the first surface 13 of the central portion 3, so that the R portion 33 is smoothly curved so as to protrude to the right side of FIG. 1(b) from the rear end side of the first surface 13 of the central portion 3 toward the first protruding portion 7a (more specifically, the portion 8 on the tip side of the hook portion 15). The R portion 33 is curved so as to be concave inward. The shape of the R portion 33 can be, for example, a circular arc having a predetermined radius.

[0032] Also, as shown in FIG. 1(c), a portion of the first surface 13 of the central portion 3 (the area indicated by the diagonal dashed line) is shaped such that both the left and right sides are cut away in the thickness direction from the central portion in the axial direction of the central portion 3 to a portion (the tip side) of the R portion 33, similar to the first blade-shaped portion H1.

[0033] That is, as shown in the cross section in Fig. 2(c) (cross section taken along D3-D3 in Fig. 1(c)), a part of the first surface 13 of the central portion 3 is formed into a mountain shape with the central portion 35 protruding toward the first surface 13. That is, a third blade portion H3 similar to the first blade portion H1 is provided on the first surface 13 side of the central portion 3.

[0034] Furthermore, as shown in FIG. 1(a), a portion of the second surface 17 at the rear end side of the central portion 3 (the area indicated by a dot) is shaped such that both the left and right sides are cut away in the thickness direction so as to extend in the axial direction, similar to the first blade portion H1.

[0035] That is, as shown in the cross section in Fig. 2(d) (cross section taken along D4-D4 in Fig. 1(a)), a part of the second surface 17 of the central portion 3 is formed into a mountain shape in which the central portion 39 protrudes toward the second surface 17. That is, a fourth blade portion H4 similar to the first blade portion H1 is provided on the second surface 17 side of the central portion 3.

[0036] Furthermore, as shown in Figures 1(a) and 1(b), the second surface 17 of the central portion 3 has multiple (e.g., two) second recesses 43 that are recessed toward the axis O and are provided along the axial direction between the fourth blade-shaped portion H4 and the first blade-shaped portion H1, near the fourth blade-shaped portion H4.

[0037] The shape of the opening of the second recess 43 (as viewed from the Y-axis direction) is, for example, rectangular, and the bottom is formed so as to become deeper toward the tip side (see FIG. 1(b)). Note that the second recess 43 is a hole recessed in the second surface 17, and the periphery of the opening is surrounded by the second surface 17.

[0038] Furthermore, the area of ​​the second surface 17 extending from the tip of the second recess 43 (more specifically, the tip-side second recess 43 among the multiple second recesses 43) to the rear end of the first blade portion H1 is a flat plane (i.e., a substantially rectangular plane) 45. This plane 45 is parallel to the ZX plane, and each end in the thickness direction reaches the B surface 3b and the A surface 3a in the thickness direction of the central portion 3, respectively. Therefore, the plane 45 has a dimension in the thickness direction similar to that of the central portion 3.

[0039] 1(a) in (e), the second surface 17 has a generally U-shaped outer shape with one side of a rectangle and left and right corners of the side, and the area of ​​the cross section (cross section perpendicular to the axial direction) is larger than that of the cross-sectional shape of the first blade portion H1. The plane 45 is perpendicular to the plane passing through the axis O and perpendicular to the plane perpendicular to the axis O.

[0040] In the following description, the plane 45 between the second recess 43 and the first blade portion H1, which has the same (i.e., the maximum) dimension in the thickness direction as the central portion 3 and is flat on the second surface 17 side, is referred to as the second plane portion S2. Therefore, when the peg 1 is driven in, the second plane portion S2 comes into contact with the soil at a wide plane far from the axis O and receives a large resistance force.

[0041] Furthermore, as shown in Figures 1(b) and 1(c), the first surface 13 of the central portion 3 has multiple (e.g., two) first recesses 47 that are recessed toward the axis O and are provided along the axial direction between the second blade-shaped portion H2 and the third blade-shaped portion H3, near the second blade-shaped portion H2.

[0042] The shape of the opening of the first recess 47 (as viewed from the Y-axis direction) is, for example, rectangular, and the bottom is formed so as to become deeper toward the tip side (see FIG. 1(b)). Note that the first recess 47 is a hole recessed in the first surface 13, and the periphery of the opening is surrounded by the first surface 13.

[0043] Furthermore, the area of ​​the first surface 13 extending from the rear end of the first recess 47 (more specifically, the rearmost first recess 47 among the multiple first recesses 47) to the tip of the third blade portion H3 is a flat plane (i.e., a substantially rectangular plane) 49. This plane 49 is parallel to the ZX plane, and each end in the thickness direction reaches the B surface 3b and the A surface 3a in the thickness direction of the central portion 3, respectively. Therefore, the plane 45 has a dimension in the thickness direction similar to that of the central portion 3.

[0044] 1(c) in Fig. 2(f), the first surface 13 side has a generally U-shaped outer shape with one side of a rectangle and left and right corners of the side, and the area of ​​the cross section (cross section perpendicular to the axis direction) is larger than that of the cross-sectional shape of the second blade portion H2. The plane 49 is perpendicular to the plane passing through the axis O and perpendicular to the plane perpendicular to the axis O.

[0045] In the following description, the plane 49 between the first recess 47 and the third blade portion H3, which has the same (i.e., the maximum) dimension in the thickness direction as the central portion 3 and is flat on the first surface 13 side, is referred to as the first plane portion S1. Therefore, when the peg 1 is driven in, the first plane portion S1 comes into contact with the soil at a wide plane far from the axis O and receives a large resistance force.

[0046] Furthermore, in the first embodiment, the first flat surface portion S1 is arranged so as to be shifted rearward from the second flat surface portion S2 in the axial direction. More specifically, in the axial direction, the leading end of the first flat surface portion S1 is provided rearward from the leading end of the second flat surface portion S2, and the rear end of the first flat surface portion S1 is provided rearward from the rear end of the second flat surface portion S2. In other words, the entire first flat surface portion S1 is arranged so as to be shifted rearward from the entire second flat surface portion S2.

[0047] The line connecting the tip of the first planar portion S1 and the tip of the second planar portion S2 is defined as the bottom line L1, the line connecting the rear end of the first planar portion S1 and the rear end of the second planar portion S2 is defined as the top line L2, and the region between the bottom line L1 and the top line L2 is defined as the predetermined region SR. Since the axial dimension of the first planar portion S1 and the axial dimension of the second planar portion S2 are the same, the bottom line L1 and the top line L2 are parallel, but the axial dimension of the first planar portion S1 and the axial dimension of the second planar portion S2 may be different.

[0048] In addition, in the axial direction, both second recesses 43 are arranged to be shifted toward the rear end side from both first recesses 47. More specifically, in the axial direction, the front end of the front-end side second recess 43 is provided rearward of the front end of the front-end side first recess 47, and the rear end of the rear-end side second recess 43 is provided rearward of the rear end of the rear-end side first recess 47. In other words, the two second recesses 43 are entirely arranged to be shifted rearward of the two first recesses 47.

[0049] [1-2. How to drive in a peg] Next, the procedure for driving the peg 1 into the ground will be described with reference to FIG. (Step 1) First, the peg 1 is placed at an angle to the ground (i.e., the ground surface). That is, the peg 1 is tilted so that the tip 5 of the peg 1 faces the ground and the axis O is tilted at, for example, 45° with respect to the ground. At this time, the orientation of the peg 1 is set so that the side where the hook portion 15 is provided (the right side of FIG. 1(b): the first surface 13 side) faces the ground, and the second surface 17 side opposite the first surface 13 faces the opposite side to the ground.

[0050] Then, with the peg 1 tilted in this manner, the peg 1 is driven into the ground (hence, into the earth). That is, the first striking portion 11 of the head 7 of the peg 1 is struck with a hammer or the like, and the peg 1 is gradually driven into the ground so that the peg 1 from the tip portion 5 to the rear end portion of the central portion 3 is driven into the earth.

[0051] (Step 2) Furthermore, as the peg 1 is driven in, the R portion 33 hits the ground, and the curve of the R portion 33 causes the rear end of the peg 1 to receive a force in the direction of the arrow A. In more detail, the R portion 33 gradually moves into the ground, and as it does so, the R portion 33 receives resistance from the ground and tilts relative to the ground, and in response to the curve of the R portion 33, the rear end of the peg 1 (i.e., the head 7 side) rotates counterclockwise in Fig. 3, and the tip end of the peg 1 also rotates counterclockwise in Fig. 3. In other words, the peg 1 rotates counterclockwise in Fig. 3 as it is driven into the ground.

[0052] When the peg 1 is driven in, the first planar portion S1 and the second planar portion S2 come into contact with the soil over a wide surface area and receive resistance. Therefore, when the R portion 33 receives a force from the ground in the direction of arrow A, it is estimated that the peg will tend to rotate with a part of the range from the first planar portion S1 to the second planar portion S2 (predetermined region SR) as the center of rotation.

[0053] In this way, when driving the peg 1, the rear end side of the peg 1 rotates in the direction of arrow A and the front end side rotates in the direction of arrow B, and as a whole, the peg 1 rotates in the counterclockwise direction in Figure 3 with the driving action. Due to this rotation, the axis O of the peg 1 becomes inclined at, for example, 55° with respect to the ground (i.e., the peg 1 is slightly raised from the initial state).

[0054] In addition, a fourth blade-shaped portion H4 having a pointed shape in the rotation direction is provided on the rear end side of the second surface 17 of the central portion 3, and a second blade-shaped portion H2 having a pointed shape in the rotation direction is provided on the first surface 13 side of the tip portion 5, making it easier for the peg 1 to rotate in the counterclockwise direction.

[0055] As the rear end of peg 1 rotates in the direction of arrow A, the soil near second surface 17 flows into second recess 43, and as the front end of peg 1 rotates in the direction of arrow B, the soil near first surface 13 flows into first recess 47.

[0056] As a result, soil has entered the second recess 43 and the first recess 47. Therefore, even if a force is applied to the peg 1 in a direction in which the peg 1 is pulled out (for example, the pulling direction along the axis O: the direction of the arrow C), the soil that has entered the second recess 43 and the first recess 47 provides resistance, making it difficult for the peg 1 to be pulled out.

[0057] (Step 3) Thereafter, when the rope RP is hung on the hook portion 15 of the peg 1 (i.e., when the rope RP is attached to the peg 1), the head 7 of the peg 1 is pulled in the direction of the arrow D, causing the head 7 of the peg 1 to rotate further in the direction of the arrow A, becoming even more erect than in step 2. The tip side of the peg 1 rotates in the direction of the arrow B. In other words, the peg 1 rotates to the left. Step 3 in Figure 3 illustrates a state in which the axis O of the peg 1 is erected to, for example, 65° with respect to the ground.

[0058] As described above, a fourth blade portion H4 is provided on the rear end side of the second surface 17 of the central portion 3, and a second blade portion H2 is provided on the first surface 13 side of the tip portion 5, making it easier for the peg 1 to rotate in the left direction.

[0059] In this way, when the rope RP is hung and the peg 1 rotates further in the left direction, the soil near the second surface 17 at the rear end of the peg 1 enters the second recess 43, and the soil near the first surface 13 at the tip end of the peg 1 enters the first recess 47, making the peg 1 even more difficult to remove.

[0060] [1-3. How to pull out the peg] Next, the procedure for pulling the peg 1 out of the ground will be described with reference to FIG. (Step 1) First, the rope RP is removed from the hook portion 15 of the peg 1.

[0061] (Step 2) Next, the second striking portion 19 of the peg 1 is struck with a hammer from the direction of the arrow E. This causes the rear end of the peg 1 to rotate clockwise. At that time, the rear end of the peg 1 rotates in the direction of the arrow F, and the front end of the peg 1 rotates in the direction of the arrow G. In other words, the peg 1 rotates clockwise. This causes the axis O of the peg 1 to be inclined, for example, up to 55° with respect to the ground.

[0062] When the peg 1 rotates slightly (for example, 10°) in the clockwise direction, gaps K1, K2 (see step 3) are generated between the peg 1 and the soil in the ground by the amount of rotation. In addition, a third blade portion H3 is provided on the rear end side of the first surface 13 of the central portion 3, and a first blade portion H1 is provided on the second surface 17 side of the tip portion 5, making it easier for the peg 1 to rotate in the clockwise direction.

[0063] (Step 3) As a result of the operations up to step 2, a gap K2 is created on the second surface 17 side of the central portion 3, which becomes wider as it goes upward, and a gap K1 is created on the first surface 13 side of the central portion 3, which becomes wider as it goes downward, making it easier to pull out the peg 1.

[0064] In this state, by hitting the protruding portion 20 with a hammer or the like in the direction of the arrow H, the peg 1 can be easily pulled out of the ground. Also, another peg 51 is turned upside down and its hook portion 53 is hooked onto the hook portion 15 of the peg 1 stuck in the ground, and the tip side of the other peg 51 is rotated in the direction of the arrow I. This makes it possible to easily pull out the peg 1 stuck in the ground.

[0065] [1-4. Effects] Next, the effects of the first embodiment will be described. (1) In this first embodiment, the peg 1 has an R portion 33 on the first surface 13 side. Furthermore, the first surface 13 has a first flat surface portion S1 and a first recess 47, and the second surface 17 has a second flat surface portion S2 and a second recess 43. In the axial direction, the first flat surface portion S1 is shifted toward the rear end side relative to the second flat surface portion S2.

[0066] With this configuration, when the peg 1 is driven into the ground, the tip end of the peg 1 rotates toward the first surface 13, and the rear end of the peg 1 rotates toward the second surface 17. That is, the peg 1 rotates, for example, in the counterclockwise direction of FIG. 1(b). As a result, soil fills the first recess 47 of the first surface 13 and the second recess 43 of the second surface 17, making the peg 1 difficult to remove. Furthermore, when a force is applied in the direction to pull out the peg 1, the edge of the tip end of the first recess 47 and the edge of the tip end of the second recess 43 provide resistance, making the peg 1 difficult to remove.

[0067] In addition, the first flat surface S1 is arranged to be shifted toward the rear end side from the second flat surface S2 in the axial direction. This allows many first recesses 47 to be arranged on the tip side of the first flat surface S1, increasing the resistance in the first recesses 47 and making it difficult for the peg 1 to be removed. Similarly, many second recesses 43 can be arranged on the rear side of the second flat surface S2, increasing the resistance in the second recesses 43 and making it difficult for the peg 1 to be removed.

[0068] (2) In the first embodiment, the first surface 13 of the tip portion 5 and the second surface 17 of the rear end of the central portion 3 are provided with blade portions (i.e., the second blade portion H2 and the fourth blade portion H4). With this configuration, when the peg 1 is driven into the ground, the peg 1 can be easily rotated, for example, in the left direction in FIG. 1(b).

[0069] (3) In the first embodiment, the first recess 47 and the second recess 43 are configured so that the front end is deeper than the rear end. With this configuration, even if a force is applied in the direction to pull out the peg 1, the soil inside the first recess 47 and the second recess 43 provides a large resistance, so that the peg 1 is also difficult to pull out.

[0070] (4) In the first embodiment, the R portion 33 is provided with blade portions (i.e., the third blade portion H3 and the first blade portion H1) from the tip side to the central portion 3 and on the second surface 17 side of the tip portion 5. With this configuration, when the second striking portion 19 is struck to remove the peg 1 from the ground, the peg 1 is easily rotated, for example, in the right direction in FIG. 1(b). This makes it easier to remove the peg 1 from the ground.

[0071] (5) In the first embodiment, the head 7 of the peg 1 is provided with the second striking portion 19 and the protruding portion 20. Therefore, when pulling the peg 1 out of the ground, the peg 1 can be rotated and easily pulled out by hitting the second striking portion 19 or the protruding portion 20 with a hammer or the like.

[0072] (6) In the first embodiment, a hammer or another peg 51 can be used to pull out the peg 1, which is advantageous in that it is not necessary to use a dedicated tool. In addition, since the central portion 3 has a rectangular prism configuration, it is advantageous in that it is difficult for rotation to occur around the axis O. In addition, it is most effective when used on soft ground such as sand. In addition, there is an advantage that it is difficult to cause back pain when pulling out the peg 1, since there is little need to perform lifting work as in the past. In addition, since it is difficult to come out during use, it is possible to make the dimensions (dimensions in the axial direction) shorter than before.

[0073] <Modification> In the first embodiment, the second recess 43 is provided on the second surface 17 of the peg 1, and the first recess 47 is provided on the first surface 13 of the peg 1, but other configurations may be adopted.

[0074] 5(a), a configuration can be adopted in which a first recess 47 is provided on the first surface 13 of the peg 1, but a second recess 43 is not provided on the second surface 17 of the peg 1. In this case, a line drawn parallel to the bottom line L1 from the rear end of the first flat surface portion S1 can be used as the top line L2, and the region between the top line L2 and the bottom line L1 can be the predetermined region SR.

[0075] 5(b), a configuration may be adopted in which the second recess 43 is provided on the second surface 17 of the peg 1, but the first recess 47 is not provided on the first surface 13 of the peg 1. In this case, the second blade portion H2 may be elongated toward the rear end. In this case, a line drawn parallel to the upper line L2 from the tip of the second flat surface portion S2 may be used as the lower line L1, and the region between the upper line L2 and the lower line L1 may be the predetermined region SR.

[0076] [2. Second embodiment] Since the second embodiment has a basic configuration similar to that of the first embodiment, the following mainly describes the differences from the first embodiment. Note that the same reference numerals as those in the first embodiment indicate the same configuration, and the preceding description is to be referred to.

[0077] As shown in FIG. 6, the peg 61 of the second embodiment has a central portion 3, a tip portion 5, a head portion 7, a first surface 13, a second surface 17, an R portion 33, a first flat portion S1, a second flat portion S2, etc., similar to the first embodiment.

[0078] In addition, the second surface 17 is provided with one second recess 43 extending in the axial direction to a constant depth, and the first surface 13 is provided with one first recess 47 extending in the axial direction to a constant depth. Particularly, in the second embodiment, the second recess 43 has two second protrusions 63 that protrude in a sawtooth shape (i.e., a triangular shape when viewed from the X-axis direction) toward the second surface 17 side (i.e., the left side of FIG. 6(b)). Similarly, the first recess 47 has two first protrusions 65 that protrude in a sawtooth shape toward the first surface 13 side (i.e., the right side of FIG. 6(b)). Note that the second protrusions 63 and the first protrusions 65 have a steeper inclination on the rear end side than on the front end side.

[0079] The angle at which the rear end faces of the triangular second convex portion 63 and first convex portion 65 are inclined when viewed from the front can be perpendicular to the axis O or an acute angle with respect to the axis O. The heights of the second convex portion 63 and first convex portion 65 may be lower than the second surface 17 and the first surface 13, respectively.

[0080] The second embodiment has the same effects as the first embodiment. In addition, the peg 61 rotates by the R portion 33, and the first convex portion 65 and the second convex portion 63 are sufficiently inserted into the soil, so that the peg 1 is less likely to come out. In other words, by providing the second convex portion 63 and the first convex portion 65, the peg 1 can be effectively prevented from accidentally coming out of the ground.

[0081] <Modification> In the second embodiment, the second recess 43 and the first recess 47 are cut out to both ends in the thickness direction, but the shape when viewed from the Y-axis direction may be a concave shape such as a rectangle.

[0082] Specifically, as shown in Figures 7(a) and (b), a second recess 43 may be provided on the second surface 17 of the central portion 3, and a second protrusion 63 may be provided in the second recess 43. Similarly, as shown in Figures 7(c) and (d), a first recess 47 may be provided on the first surface 13 of the central portion 3, and a first protrusion 65 may be provided in the first recess 47.

[0083] 7(e) and (f), a second protrusion 63 may be provided on the second surface 17 of the central portion 3 at a position different from the second recess 43 (for example, closer to the tip or rear end than the second recess 43). Similarly, a first protrusion 65 may be provided on the first surface 13 of the central portion 3 at a position different from the first recess 47 (for example, closer to the tip or rear end than the first recess 47) as shown in FIG. 7(g) and (h).

[0084] As yet another modified example, a second protrusion 63 having a shape similar to that shown in Figures 7(e) and (f) may be provided on the second surface 17 of the central portion 3 without providing a second recess 43. Similarly, a first protrusion 65 having a shape similar to that shown in Figures 7(g) and (h) may be provided on the first surface 13 of the central portion 3 without providing a first recess 47.

[0085] In addition, in each of the modified examples, it is desirable to have both the configuration on the second surface 17 side and the configuration on the first surface 13 side, but it is also possible to have either one of the configurations. 3. Other embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take various forms.

[0086] (1) The number of the first recess or the second recess may be one or more. The shape of the bottom of the first recess or the second recess may be a shape other than that of the first embodiment, and the bottom may be flat. The number of the first convex portion or the second convex portion may be one or more. The inside of the first recess or the second recess may be formed so as to be recessed toward the tip side from the end (edge) on the tip side of the opening of the first recess or the second recess. In the axial direction, the length of the first flat portion may be longer than the first recess or the first convex portion, and the length of the second flat portion may be longer than the second recess or the second convex portion. Examples of the extension portion include a string-like object (string-like portion) such as a rope, and a part or the whole may be a string.

[0087] (2) The pegs can be manufactured by casting, but they can also be manufactured by forging, cutting, etc., and there is no particular limitation on the manufacturing method. In addition, as the material for the pegs, in addition to well-known metals such as Mg-based alloys (for example, metals generally used for pegs), resins, etc. can be used.

[0088] (3) Multiple functions possessed by one component in each of the above embodiments and modified examples may be realized by multiple components, or one function possessed by one component may be realized by multiple components. Furthermore, multiple functions possessed by multiple components may be realized by one component, or one function realized by multiple components may be realized by one component. Furthermore, part of the configuration of each of the above embodiments may be omitted. Furthermore, at least part of the configuration of each of the above embodiments may be added to or substituted for the configuration of another embodiment. [Explanation of symbols]

[0089] 1, 51...peg, 3...center portion, 5...tip portion, 7...head portion, 13...first surface, 17...second surface, 33...R portion, 47...first recess, 43...second recess, 65...first protrusion, 63...second protrusion

Claims

1. In a peg used for fixing an object to the ground, A columnar central portion having an elongated shape extending in an axial direction and having a first surface and a second surface extending parallel to the axial direction and facing each other; a tip portion provided on a tip side of the central portion and having a pointed shape toward the tip side; a head portion provided at the rear end side of the central portion and adapted to receive an external impact when the peg is driven into the ground; Equipped with The head portion includes: The fixing member has a protruding portion on the first surface side, the protruding portion protruding away from the axis line from the first surface, and a hook portion for hooking an extension portion extending from the fixed object on the protruding portion, The peg is On the first surface side, the protruding portion of the head portion includes an R portion that is curved inwardly from a portion of the protruding portion of the head portion that is closer to the tip end side than the hook portion to a rear end side of the central portion, a first flat surface portion having a flat shape between the tip portion and the R portion on the first surface, and a second flat surface portion having a flat shape on the rear end side of the tip portion on the second surface, and a first recessed portion recessed toward the axis line between the tip portion and the first flat portion on the first surface, and a second recessed portion recessed toward the axis line on the rear end side of the second flat portion on the second surface, In the axial direction, the first flat surface portion is shifted toward the rear end side relative to the second flat surface portion. Peg.

2. In a peg used for fixing an object to the ground, A columnar central portion having an elongated shape extending in an axial direction and having a first surface and a second surface extending parallel to the axial direction and facing each other; a tip portion provided on a tip side of the central portion and having a pointed shape toward the tip side; a head portion provided at a rear end side of the central portion and adapted to receive an external impact when the peg is driven into the ground; Equipped with The head portion includes: The fixing member has a protruding portion on the first surface side, the protruding portion protruding away from the axis line from the first surface, and a hook portion for hooking an extension portion extending from the fixed object on the protruding portion, The peg is On the first surface side, the protruding portion of the head portion includes an R portion that is curved inwardly from a portion of the protruding portion of the head portion that is closer to the tip end side than the hook portion to a rear end side of the central portion, a first flat surface portion having a flat shape between the tip portion and the R portion on the first surface, and a second flat surface portion having a flat shape on the rear end side of the tip portion on the second surface, and a first recessed portion recessed toward the axis line between the tip portion and the first flat portion on the first surface, or a second recessed portion recessed toward the axis line on the rear end side of the second flat portion on the second surface, In the axial direction, the first flat surface portion is shifted toward the rear end side relative to the second flat surface portion. Peg.

3. In a peg used for fixing an object to the ground, A columnar central portion having an elongated shape extending in an axial direction and having a first surface and a second surface extending parallel to the axial direction and facing each other; a tip portion provided on a tip side of the central portion and having a pointed shape toward the tip side; a head portion provided at a rear end side of the central portion and adapted to receive an external impact when the peg is driven into the ground; Equipped with The head portion includes: The fixing member has a protruding portion on the first surface side, the protruding portion protruding away from the axis line from the first surface, and a hook portion for hooking an extension portion extending from the fixed object on the protruding portion, The peg is On the first surface side, the protruding portion of the head portion includes an R portion that is curved inwardly from a portion of the protruding portion of the head portion that is closer to the tip end side than the hook portion to a rear end side of the central portion, a first flat surface portion having a flat shape between the tip portion and the R portion on the first surface, and a second flat surface portion having a flat shape on the rear end side of the tip portion on the second surface, and a first convex portion is provided on the first surface between the tip portion and the first flat portion and protruding in a direction opposite to the axis, and a second convex portion is provided on the second surface and protruding in a direction opposite to the axis from the second flat portion toward the rear end, In the axial direction, the first flat surface portion is shifted toward the rear end side relative to the second flat surface portion. Peg.

4. In a peg used for fixing an object to the ground, A columnar central portion having an elongated shape extending in an axial direction and having a first surface and a second surface extending parallel to the axial direction and facing each other; a tip portion provided on a tip side of the central portion and having a pointed shape toward the tip side; a head portion provided at a rear end side of the central portion and adapted to receive an external impact when the peg is driven into the ground; Equipped with The head portion includes: The fixing member has a protruding portion on the first surface side, the protruding portion protruding away from the axis line from the first surface, and a hook portion for hooking an extension portion extending from the fixed object on the protruding portion, The peg is On the first surface side, the protruding portion of the head portion includes an R portion that is curved inwardly from a portion of the protruding portion of the head portion that is closer to the tip end side than the hook portion to a rear end side of the central portion, a first flat surface portion having a flat shape between the tip portion and the R portion on the first surface, and a second flat surface portion having a flat shape on the rear end side of the tip portion on the second surface, and a first convex portion protruding on the first surface between the tip portion and the first flat portion in a direction opposite to the axis, or a second convex portion protruding on the second surface toward the rear end side from the second flat portion in a direction opposite to the axis, In the axial direction, the first flat surface portion is shifted toward the rear end side relative to the second flat surface portion. Peg.

5. A peg according to any one of claims 1 to 4, A peg having blade-shaped portions on the first surface side of the tip portion and on the second surface side of the rear end side of the central portion, the blade-shaped portions extending in the axial direction and becoming thinner as they move away from the axis.

6. A peg according to any one of claims 1 to 4, A peg having a blade-shaped portion extending in the axial direction from the tip side of the R portion to the central portion and on the second surface side of the tip portion and becoming thinner the further away from the axis.

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