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] BACKGROUND ART Conventionally, thin and long metal pegs have been used as tools for fastening items (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 pointed tip. Also known are rod-shaped pegs with a head at the rear end for hitting with a hammer and a hook near the head for hooking a rope extending from a tent or other object to be fixed (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-24325 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 if force is applied to the peg in the direction opposite to the direction in which it is driven (i.e., if force is applied in the direction in which the peg is pulled out), the peg has the problem of easily coming out of the ground.

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

[0006] (1) One aspect of the present disclosure relates to a peg used to secure an object to the ground. The peg has an elongated shape extending in an axial direction and includes a columnar central portion having first and second surfaces extending parallel to the axial direction and facing each other; a tip portion provided at the tip end of the central portion and having a pointed shape toward the tip end; and a head portion provided at the rear end of the central portion and receiving an external impact when the peg is driven into the ground. The head has a protruding portion on the first surface side that protrudes farther from the axis than the first surface, and a hook portion on the protruding portion that hooks an extension extending from the object to be secured. On the first surface side, the protruding portion of the head has a curved portion that curves inward from the tip end of the hook portion to the rear end of the central portion. The first surface has a first flat surface portion between the tip end and the curved portion, and the second surface has a second flat surface portion rearward of the tip end. The first surface has a first recess recessed toward the axis between the tip end and the first flat surface, and the second surface has a second recess recessed toward the axis rearward from the second flat surface. In the axial direction, the first flat surface is shifted rearward from the second flat surface.

[0007] In the present disclosure, with this 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. In other words, the peg rotates counterclockwise, for example, as shown in FIG. 1(b). This allows soil to enter the first recess on the first surface and the second recess on 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 secure an object to the ground. The peg has an elongated shape extending in an axial direction and includes a columnar central portion having first and second surfaces extending parallel to the axial direction and facing each other; a tip portion provided at the tip end of the central portion and having a pointed shape toward the tip end; and a head portion provided at the rear end of the central portion and receiving an external impact when the peg is driven into the ground. The head has a protruding portion on the first surface side that protrudes farther from the axis than the first surface, and a hook portion on the protruding portion for hooking an extension extending from the object to be secured. On the first surface side, the protruding portion of the head has a curved portion that curves inward from the tip end of the hook portion to the rear end of the central portion. The first surface has a first flat surface portion between the tip end and the curved portion, and the second surface has a second flat surface portion rearward of the tip end. The first surface has a first recess recessed toward the axis between the tip portion and the first flat surface, or the second surface has a second recess recessed toward the axis rearward from the second flat surface. In the axial direction, the first flat surface is shifted rearward from the second flat surface.

[0009] In the present disclosure, either a first recess or a second recess is provided. With this configuration, when the peg is driven into the ground, the tip 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 counterclockwise, for example, as shown in FIG. 1(b). This allows soil to enter 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 secure an object to the ground. The peg has an elongated shape extending in an axial direction and includes a columnar central portion having first and second surfaces extending parallel to the axial direction and facing each other; a tip portion provided at the tip end of the central portion and having a pointed shape toward the tip end; and a head portion provided at the rear end of the central portion and receiving an external impact when the peg is driven into the ground. The head has a protruding portion on the first surface side that protrudes farther from the axis than the first surface, and a hook portion on the protruding portion for hooking an extension extending from the object to be secured. On the first surface side, the protruding portion of the head has a curved portion that curves inward from the tip end of the hook portion to the rear end of the central portion. The first surface has a first flat surface portion between the tip end and the curved portion, and the second surface has a second flat surface portion rearward of the tip end. The first surface has a first convex portion that protrudes in the opposite direction from the axis between the tip portion and the first flat portion, and the second surface has a second convex portion that protrudes in the opposite direction from the axis rearward from the second flat portion. In the axial direction, the first flat portion is positioned to be shifted rearward from the second flat portion.

[0011] In the present disclosure, with this 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 counterclockwise, for example, as shown in FIG. 6(b). This allows the first convex portion on the first surface to fully penetrate the soil, and the second convex portion on the second surface to fully penetrate the soil, making it difficult for the peg to come out.

[0012] (4) Another aspect of the present disclosure relates to a peg used to secure an object to the ground. The peg has an elongated shape extending in an axial direction and includes a columnar central portion having first and second surfaces extending parallel to the axial direction and facing each other; a tip portion provided at the tip end of the central portion and having a pointed shape toward the tip end; and a head portion provided at the rear end of the central portion and receiving an external impact when the peg is driven into the ground. The head has a protruding portion on the first surface side that protrudes farther from the axis than the first surface, and a hook portion on the protruding portion for hooking an extension extending from the object to be secured. On the first surface side, the protruding portion of the head has a curved portion that curves inward from the tip end of the hook portion to the rear end of the central portion. The first surface has a first flat surface portion between the tip end and the curved portion, and the second surface has a second flat surface portion rearward of the tip end. The first surface has a first convex portion that protrudes in the opposite direction from the axis between the tip portion and the first flat portion, or the second surface has a second convex portion that protrudes in the opposite direction from the axis rearward from the second flat portion. In the axial direction, the first flat portion is positioned to be shifted rearward from the second flat portion.

[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 front 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 counterclockwise direction as shown in FIG. 6(b). This allows the first convex portion on the first surface or the second convex portion on the second surface to fully penetrate into the soil, making the peg less likely to come out.

[0014] In the present disclosure described above, the tip side refers to one side in the axial direction (i.e., the pointed side), and the rear side refers to the other side opposite 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 explanation of the drawings]

[0015] [Figure 1] 1A is a left side view of the peg of the first embodiment, FIG. 1B is a front view of the peg, and FIG. 1C is a right side view of the peg. [Figure 2] (a) is a cross-sectional view showing the D1-D1 section of Figure 1(a), (b) is a cross-sectional view showing the D2-D2 section of Figure 1(c), (c) is a cross-sectional view showing the D3-D3 section of Figure 1(c), (d) is a cross-sectional view showing the D4-D4 section of Figure 1(a), (e) is a cross-sectional view showing the D5-D5 section of Figure 1(a), and (f) is a cross-sectional view showing the D6-D6 section of Figure 1(c). [Figure 3] FIG. 2 is an explanatory diagram showing a procedure for driving in a peg according to the first embodiment. [Figure 4] 5A to 5C are explanatory views showing a procedure for pulling out a peg in the first embodiment. [Figure 5] FIG. 10(a) is a front view showing a modified example of the peg of the first embodiment, and FIG. 10(b) is a front view showing another modified example of the peg. [Figure 6] 10A is a left side view of a peg according to a second embodiment, FIG. 10B is a front view of the peg, and FIG. 10C is a right side view of the peg. [Figure 7] (a) is a left side view showing a portion of the rear end side of a modified peg of the second embodiment, (b) is a front view showing a portion of the rear end side of the modified peg, (c) is a right side view showing a portion of the tip end side of the modified peg, (d) is a front view showing a portion of the tip end side of the modified peg, (e) is a left side view showing a portion of the rear end side of another modified peg, (f) is a front view showing a portion of the rear end side of another modified peg, (g) is a right side view showing a portion of the tip end side of another modified peg, and (h) is a front view showing a portion of the tip end side of another modified peg. DETAILED DESCRIPTION OF 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 fasten an object to the ground, and is a long stake extending in the axial direction (the direction of axis O). That is, 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 Cartesian 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 leading end side in the Z axis direction, and the upper side is the trailing 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 rectangular 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 Figure 1(b), the head portion 7 is a plate-shaped portion that is struck with a hammer or the like when driving the peg 1 into the ground, and it protrudes rearward from the center portion 3 and also extends out on both sides in the width direction (Y-axis direction) from the center portion 3. The portion of the head portion 7 that protrudes to the right in Figure 1(b) is called the first protruding portion 7a, and the portion that protrudes to the left in the same figure is called the 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 will be described later, this first impact part 11 is the part that is struck with a hammer or the like when driving the peg 1 into the ground.

[0021] A hook 15 is provided on the first protruding portion 7a of the head 7. More specifically, on one side in the width direction of the head 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 obliquely into the ground, the hook 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 recessed portion that extends from the upper left to the lower right in FIG. 1(b) and opens diagonally downward to the right, with the space becoming larger towards the opening side. A second striking part 19 is provided on the second protruding part 7b of the head part 7. More specifically, the flat second striking part 19 is provided on the other widthwise side of the head part 7 (the left side in FIG. 1(b)), i.e., on the second surface 17 side (opposite the first surface 13) that is farther from the ground when the peg 1 is driven diagonally into the ground, and is used to pull the peg 1 out of the ground.

[0023] The second impact part 19 is inclined at a predetermined angle relative to the axial direction, extending from the upper right to the lower left in Fig. 1(b). The predetermined angle may be, for example, 45°±5°. In addition, a protrusion 20 is provided on the second surface 17 side of the second striking portion 19 (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 other figures, 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 area of ​​the second surface 17 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 cut away in the thickness direction (X-axis direction).

[0026] That is, as shown in the cross section in Figure 2(a) (D1-D1 cross section in Figure 1(a)), the second surface 17 side of the tip portion 5 is formed in a mountain shape (convex shape) protruding toward the second surface 17 side, as if its left and right sides were cut diagonally (i.e., as if it were 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 extending 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 portion of the tip side of the central portion 3.

[0028] As shown in FIG. 1(c), similar to the first blade-shaped portion H1, the area indicated by the dots on the first surface 13 side of the tip portion 5 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 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, the first surface 13 side of the tip portion 5 is provided with a second blade-shaped portion H2 similar to the first blade-shaped portion H1. 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 in FIG. 1(b) from the position of the first surface 13 of the central portion 3, so the R portion 33 is smoothly curved so as to protrude to the right in 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 Figure 1(c), a portion of the first surface 13 of the central portion 3 (the area indicated by the diagonal dashed line) has a shape in which both the left and right sides are cut in the thickness direction, similar to the first blade-shaped portion H1, from the central portion in the axial direction of the central portion 3 to a portion (tip side) of the R portion 33.

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

[0034] Furthermore, as shown in Figure 1(a), a portion of the second surface 17 at the rear end side of the central portion 3 (the area indicated by the dots) has a shape in which both the left and right sides are cut in the thickness direction so as to extend in the axial direction, similar to the first blade-shaped portion H1.

[0035] That is, as shown in the cross section in Figure 2(d) (cross section taken along D4-D4 in Figure 1(a)), part of the second surface 17 of the central portion 3 is formed in a mountain shape, with the central portion 39 protruding toward the second surface 17. That is, a fourth blade-shaped portion H4 similar to the first blade-shaped 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 recessed toward the axis O, provided along the axial direction, between the fourth blade-shaped portion H4 and the first blade-shaped portion H1, closer to the fourth blade-shaped portion H4.

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

[0038] Furthermore, the region 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-shaped 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 the same dimension in the thickness direction as the central portion 3.

[0039] 1(a) in Figure 2(e), the second surface 17 side has a generally U-shaped outer shape with one side of a rectangle and left and right corners of the side, and the cross-sectional area (cross-section perpendicular to the axial direction) is larger than that of the cross-sectional shape of the first blade-like 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, the plane 45 between the second recess 43 and the first blade-shaped portion H1, which has the same (i.e., the largest) dimension in the thickness direction as the central portion 3 and is flat on the second surface 17 side, will be 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 therefore 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 recessed toward the axis O, 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 opening of first recess 47 has a rectangular shape (as viewed from the Y-axis direction), and its bottom is formed to become deeper toward the tip (see FIG. 1(b)). First recess 47 is a hole recessed in first surface 13, and the opening is surrounded by first surface 13.

[0043] Furthermore, the region 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-shaped 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 of the central portion 3, respectively. Therefore, the plane 45 has the same thickness dimension as 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 cross-sectional area (cross-section perpendicular to the axial direction) is larger than that of the cross-sectional shape of the second blade-like 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, the plane 49 between the first recess 47 and the third blade-like portion H3, which has the same (i.e., largest) dimension in the thickness direction as the central portion 3 and is flat on the first surface 13 side, will be 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 therefore receives a large resistance force.

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

[0047] The line connecting the tip of the first planar portion S1 and the tip of the second planar portion S2 is referred to 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 referred to as the top line L2, and the region between the bottom line L1 and the top line L2 is referred to as the predetermined region SR. Because 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 rearward from both first recesses 47. More specifically, in the axial direction, the leading end of the leading-end side second recess 43 is located rearward from the leading end of the leading-end side first recess 47, and the rear end of the rear-end side second recess 43 is located rearward from the rear end of the rear-end side first recess 47. In other words, the two second recesses 43 are arranged to be shifted rearward from the two first recesses 47 as a whole.

[0049] [1-2. How to drive in the pegs] 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 relative to the ground (i.e., the ground surface). That is, the peg 1 is tilted so that the tip 5 of the peg 1 points toward the ground and the axis O is tilted at an angle of, for example, 45° relative 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 away from the ground.

[0050] Then, with the peg 1 tilted in this manner, the peg 1 is driven into the ground (and therefore 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 is driven from the tip 5 to the rear end of the center 3 into the ground.

[0051] (Step 2) Furthermore, as the peg 1 is driven in, the rounded portion 33 comes into contact with the ground, and the curve of the rounded portion 33 causes the rear end of the peg 1 to receive a force in the direction of arrow A. More specifically, the rounded portion 33 gradually moves into the ground, and as it does so, the rounded portion 33 receives resistance from the ground and tilts relative to the ground, and in response to the curve of the rounded portion 33, the rear end of the peg 1 (i.e., the head portion 7 side) rotates counterclockwise in FIG. 3, and the front 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 flat surface S1 and the second flat surface S2 come into contact with the soil over a wide surface area and receive resistance. Therefore, when the R portion 33 receives force from the ground in the direction of arrow A, the peg is likely to rotate with a part of the range from the first flat surface S1 to the second flat surface S2 (predetermined region SR) as the center of rotation.

[0053] In this way, when driving the peg 1, the rear end of the peg 1 rotates in the direction of arrow A, and the front end rotates in the direction of arrow B, and as a whole, the peg 1 rotates counterclockwise in Figure 3 as it is driven in. This rotation causes the axis O of the peg 1 to tilt at an angle of, for example, 55° with respect to the ground (i.e., the peg 1 is slightly raised from its initial position).

[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] Then, by rotating the rear end of the peg 1 in the direction of arrow A, the soil near the second surface 17 enters the second recess 43, and by rotating the front end of the peg 1 in the direction of arrow B, the soil near the first surface 13 enters the 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 to pull out the peg 1 (for example, the pulling direction along the axis O: the direction of 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 hooked onto 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 arrow D, causing the head 7 of the peg 1 to rotate further in the direction of arrow A, becoming even more erect than in step 2. The tip of the peg 1 rotates in the direction of arrow B. In other words, the peg 1 rotates counterclockwise. 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, the fourth blade portion H4 is provided on the rear end side of the second surface 17 of the central portion 3, and the 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 attached 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 remove the peg] Next, the procedure for pulling out the peg 1 from 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 arrow E. This causes the rear end of the peg 1 to rotate clockwise. At this time, the rear end of the peg 1 rotates in the direction of arrow F, and the front end of the peg 1 rotates in the direction of arrow G. In other words, the peg 1 rotates clockwise. As a result, the axis O of the peg 1 becomes tilted, for example, up to 55° with respect to the ground.

[0062] When the peg 1 rotates slightly (for example, 10°) clockwise, gaps K1 and K2 (see step 3) are created 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) By performing the steps up to step 2, a gap K2 is created on the second surface 17 side of the central part 3, which becomes wider as it goes upward, and a gap K1 is created on the first surface 13 side of the central part 3, which becomes wider as it goes downward, making it easier to pull out the peg 1.

[0064] In this state, the peg 1 can be easily pulled out from the ground by hitting the protruding portion 20 in the direction of the arrow H with a hammer or the like. 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 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 the 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 S1 and a first recess 47, and the second surface 17 has a second flat surface S2 and a second recess 43. In the axial direction, the first flat surface S1 is shifted toward the rear end side relative to the second flat surface S2.

[0066] With this configuration, when the peg 1 is driven into the ground, the tip of the peg 1 rotates toward the first surface 13, and the rear end of the peg 1 rotates toward the second surface 17. In other words, the peg 1 rotates, for example, counterclockwise as shown in 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 it difficult for the peg 1 to come out. Furthermore, when a force is applied in the direction of pulling out the peg 1, the edge of the tip of the first recess 47 and the edge of the tip of the second recess 43 provide resistance, making it difficult for the peg 1 to come out.

[0067] In addition, the first flat surface S1 is positioned more rearward than the second flat surface S2 in the axial direction. This allows many first recesses 47 to be positioned closer to the tip of the first flat surface S1, increasing the resistance at the first recesses 47 and making it difficult for the peg 1 to come out. Similarly, many second recesses 43 can be positioned closer to the rear of the second flat surface S2, increasing the resistance at the second recesses 43 and making it difficult for the peg 1 to come out.

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

[0069] (3) In the first embodiment, the first recess 47 and the second recess 43 are configured so that their front ends are deeper than their rear ends. With this configuration, even when force is applied in the direction of pulling out the peg 1, the soil inside the first recess 47 and the second recess 43 provides a large resistance, making it difficult for the peg 1 to be pulled out.

[0070] (4) In the first embodiment, the rounded portion 33 is provided with blades (i.e., the third blade H3 and the first blade H1) from the tip to the central portion 3, and on the second surface 17 side of the tip portion 5. This configuration makes it easier for the peg 1 to rotate, for example, clockwise as shown in FIG. 1(b), when striking the second striking portion 19 to remove the peg 1 from the ground. 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 has the advantage that no dedicated tool is required. Furthermore, since the central portion 3 has a rectangular prism configuration, it is less likely to rotate around the axis O. Furthermore, it is most effective when used on soft ground, such as sand. Furthermore, since there is less need to perform the conventional lifting work when pulling out the peg 1, it is less likely to cause back pain. Furthermore, since the peg is less likely 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 employed.

[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 S1 can be used as the top line L2, and the region between the top line L2 and the bottom line L1 can be defined as 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 can be elongated toward the rear end. In this case, the lower line L1 can be a line drawn parallel to the upper line L2 from the tip of the second flat portion S2, and the region between the upper line L2 and the lower line L1 can be defined as the predetermined region SR.

[0076] [2. Second Embodiment] The second embodiment has the same basic configuration as the first embodiment, and therefore 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 reference is made to the preceding description.

[0077] As shown in Figure 6, the peg 61 of this 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 has one second recess 43 extending in the axial direction at a constant depth, and the first surface 13 has one first recess 47 extending in the axial direction at a constant depth. In particular, 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 at the rear end side than at the front end side.

[0079] The angle at which the rear end surfaces 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 embedded in the soil, making it difficult for the peg 1 to come out. In other words, the provision of the second convex portion 63 and the first convex portion 65 effectively prevents the peg 1 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 also be a recessed 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, as shown in FIGS. 7(g) and (h), 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).

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

[0085] In each of the above-described 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 on various forms.

[0086] (1) The number of the first recesses and the second recesses may be one or more. The shape of the bottom of the first recesses and the second recesses may be a shape other than that of the first embodiment, and the bottom may be flat. The number of the first convex portions and the second convex portions may be one or more. The interior of the first recesses and the second recesses may be formed so as to be recessed toward the tip side relative to the tip end (edge) of the opening of the first recesses and the second recesses. In the axial direction, the length of the first flat portion may be longer than that of the first recesses or the first convex portion, and the length of the second flat portion may be longer than that of the second recesses 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 entire portion may be a string.

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

[0088] (3) Multiple functions possessed by one component in each of the above embodiments and variations may be realized by multiple components, or one function possessed by one component may be realized by multiple components. Also, 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. Also, part of the configuration of each of the above embodiments may be omitted. Also, 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 to fix 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 a protruding portion that protrudes on the first surface side away from the axis line relative to the first surface, and a hook portion that hooks onto the protruding portion an extension portion extending from the object to be fixed; The peg is On the first surface side, the protruding portion of the head portion has an R portion that is curved inward from a portion of the protruding portion closer to the tip end than the hook portion to a rear end side of the central portion, the first surface includes a first flat surface portion between the tip portion and the R portion, and the second surface includes a second flat surface portion on the rear end side of the tip portion, The first surface has a first recessed portion recessed toward the axis between the tip end portion and the first flat surface portion, and the second surface has a second recessed portion recessed toward the axis on the rear end side of the second flat surface portion, the first flat surface portion is disposed so as to be shifted toward the rear end side relative to the second flat surface portion in the axial direction; Peg.

2. In a peg used to fix 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 a protruding portion that protrudes on the first surface side away from the axis line relative to the first surface, and a hook portion that hooks onto the protruding portion an extension portion extending from the object to be fixed; The peg is On the first surface side, the protruding portion of the head portion has an R portion that is curved inward from a portion of the protruding portion closer to the tip end than the hook portion to a rear end side of the central portion, the first surface includes a first flat surface portion between the tip portion and the R portion, and the second surface includes a second flat surface portion on the rear end side of the tip portion, and a first recessed portion recessed toward the axis line between the tip end 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, the first flat surface portion is disposed so as to be shifted toward the rear end side relative to the second flat surface portion in the axial direction; Peg.

3. In a peg used to fix 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 a protruding portion that protrudes on the first surface side away from the axis line relative to the first surface, and a hook portion that hooks onto the protruding portion an extension portion extending from the object to be fixed; The peg is On the first surface side, the protruding portion of the head portion has an R portion that is curved inward from a portion of the protruding portion closer to the tip end than the hook portion to a rear end side of the central portion, the first surface includes a first flat surface portion between the tip portion and the R portion, and the second surface includes a second flat surface portion on the rear end side of the tip portion, and a first convex portion is provided on the first surface between the tip end portion and the first flat portion, the first convex portion protruding in a direction opposite to the axis, and a second convex portion is provided on the second surface, the second convex portion protruding in a direction opposite to the axis from the second flat portion toward the rear end, the first flat surface portion is disposed so as to be shifted toward the rear end side relative to the second flat surface portion in the axial direction; Peg.

4. In a peg used to fix 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 a protruding portion that protrudes on the first surface side away from the axis line relative to the first surface, and a hook portion that hooks onto the protruding portion an extension portion extending from the object to be fixed; The peg is On the first surface side, the protruding portion of the head portion has an R portion that is curved inward from a portion of the protruding portion closer to the tip end than the hook portion to a rear end side of the central portion, the first surface includes a first flat surface portion between the tip portion and the R portion, and the second surface includes a second flat surface portion on the rear end side of the tip portion, and a first convex portion protruding on the first surface between the tip end portion and the first flat portion in a direction opposite to the axis, or a second convex portion protruding on the second surface from the second flat portion toward the rear end in a direction opposite to the axis, the first flat surface portion is disposed so as to be shifted toward the rear end side relative to the second flat surface portion in the axial direction; Peg.

5. A peg according to any one of claims 1 to 4, A peg having blade-like portions on the first surface side of the tip portion and the second surface side of the rear end side of the central portion, the blade-like 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, the blade-shaped portion becoming thinner the further away from the axis.

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