JP3170721U

JP3170721U - Pile

Info

Publication number: JP3170721U
Application number: JP2011003702U
Authority: JP
Inventors: 奉一中山
Original assignee: ガイアパイル東日本株式会社
Priority date: 2011-06-29
Filing date: 2011-06-29
Publication date: 2011-09-29
Anticipated expiration: 2021-06-29

Abstract

【課題】掘削後に支持機能を高めることができる杭を提供する。【解決手段】先端拡翼１６を有する頭部１０，１１，１２をロッド１の先端側に設けるとともに、ロッド１の外周には頭部１０，１１，１２側からロッド１の基端側へロッド１の回転中心線１ａに沿って螺旋溝を形成するように複数組の螺旋拡翼７を並設している。ロッド１の複数組の螺旋拡翼７のうち頭部１０，１１，１２側の螺旋拡翼７の直径Ｄ１よりもロッド１の基端側の螺旋拡翼７の直径Ｄ１を大きくして、ロッド１の螺旋拡翼７の直径Ｄ１が頭部１０，１１，１２側からロッド１の基端側へ向うに従い次第に大きくするとともに、頭部１０，１１，１２に隣接する一組の螺旋拡翼７の直径Ｄ１に対し頭部１０，１１，１２の先端拡翼１６の直径Ｄ１６を同一または小さくした。掘削後に杭を抜き取らない場合に、ロッド１の長手方向の抵抗力が大きくなって支持機能を高めることができる。【選択図】図６Provided is a pile capable of enhancing a support function after excavation. Heads 10, 11, and 12 having tip wings 16 are provided on the tip side of the rod 1, and the rod 1 is connected to the outer periphery of the rod 1 from the heads 10, 11, and 12 to the base end side of the rod 1. A plurality of sets of spiral expansion blades 7 are arranged side by side so as to form a spiral groove along one rotation center line 1a. The diameter D1 of the spiral wing 7 on the proximal end side of the rod 1 is made larger than the diameter D1 of the spiral wing 7 on the heads 10, 11, 12 side of the plurality of sets of spiral wings 7 of the rod 1, and the rod The diameter D1 of one spiral wing 7 gradually increases from the head 10, 11, 12 side toward the proximal end of the rod 1, and a set of spiral wings 7 adjacent to the head 10, 11, 12 is set. The diameter D16 of the tip wing 16 of the heads 10, 11, and 12 is the same as or smaller than the diameter D1. When the pile is not extracted after excavation, the resistance force in the longitudinal direction of the rod 1 is increased and the support function can be enhanced. [Selection] Figure 6

Description

本考案は掘削後の支持機能を高めた杭に関するものである。 The present invention relates to a pile having enhanced support function after excavation.

下記の特許文献1に例示した杭は、ロッドの先端側に設けられた頭部の形態を改良して掘削機能を高めることを主目的とし、通常、掘削後に逆回転されて抜き取られる。
特開２０１０−４３４３１号公報 The pile exemplified in Patent Document 1 below is mainly intended to improve the excavation function by improving the form of the head provided on the tip end side of the rod, and is normally extracted after being reversely rotated after excavation.
JP 2010-43431 A

一方、杭において掘削後に抜き取らずに支持機能を高めるためには、主にロッドの形態を改良してロッドの長手方向の抵抗力を大きくする必要がある。
この考案は、掘削後に支持機能を高めることができる杭を提供することを目的としている。また、掘削後に支持機能を高めることができる杭を含む多機能の杭として使い分けることができる杭も提供することを目的としている。 On the other hand, in order to enhance the support function without removing the pile after excavation, it is necessary to mainly improve the form of the rod and increase the resistance in the longitudinal direction of the rod.
This invention aims at providing the pile which can raise a support function after excavation. Moreover, it aims at providing the pile which can be properly used as a multifunctional pile including the pile which can raise a support function after excavation.

後記実施形態の図面（図１〜９）の符号を援用して本考案にかかる杭を説明する。
請求項１の考案にかかる杭においては、いずれも、例えば図６，７，８，９に示すように、先端拡翼（１６）を有する頭部（１０，１１，１２）をロッド（１，２）の先端側に設けるとともに、このロッド（１，２）の外周にはこの頭部（１０，１１，１２）側からロッド（１，２）の基端側へロッド（１，２）の回転中心線（１ａ，２ａ）に沿って螺旋溝（６）を形成するように螺旋拡翼（７）を並設している。このロッド（１，２）の螺旋拡翼（７）の全部または一部の直径（Ｄ１，Ｄ２）は、この頭部（１０，１１，１２）の先端拡翼（１６）の直径（Ｄ１６）よりも大きく設定され、または、この（１０，１１，１２）の先端拡翼（１６）の直径（Ｄ１６）と同一に設定されている。 The pile concerning this invention is demonstrated using the code | symbol of drawing (FIGS. 1-9) of postscript embodiment.
In any of the piles according to the invention of claim 1, as shown in FIGS. 6, 7, 8, and 9, for example, the head (10, 11, 12) having the tip wings (16) is connected to the rod (1, 2) and the outer periphery of the rod (1, 2) from the head (10, 11, 12) side to the base end side of the rod (1, 2) The spiral wings (7) are arranged side by side so as to form a spiral groove (6) along the rotation center line (1a, 2a). The diameter (D1, D2) of all or part of the spiral blade (7) of the rod (1, 2) is the diameter (D16) of the tip blade (16) of the head (10, 11, 12). Or larger than the diameter (D16) of the tip wing (16) of (10, 11, 12).

請求項２の考案にかかる杭においては、例えば図６，８に示すように、先端拡翼（１６）を有する頭部（１０，１１，１２）をロッド（１）の先端側に設けるとともに、このロッド（１）の外周にはこの頭部（１０，１１，１２）側からロッド（１）の基端側へロッド（１）の回転中心線（１ａ）に沿って螺旋溝（６）を形成するように複数組の螺旋拡翼（７）を並設し、このロッド（１）の複数組の螺旋拡翼（７）のうち頭部（１０，１１，１２）側の螺旋拡翼（７）の直径（Ｄ１）よりもロッド（１）の基端側の螺旋拡翼（７）の直径（Ｄ１）を大きくするとともに、この頭部（１０，１１，１２）に隣接する一組の螺旋拡翼（７）の直径（Ｄ１）に対し頭部（１０，１１，１２）の先端拡翼（１６）の直径（Ｄ１６）を同一または小さくした。 In the pile according to the invention of claim 2, for example, as shown in FIGS. 6 and 8, a head (10, 11, 12) having a tip wing (16) is provided on the tip side of the rod (1), and A spiral groove (6) is formed on the outer periphery of the rod (1) from the head (10, 11, 12) side to the base end side of the rod (1) along the rotation center line (1a) of the rod (1). A plurality of sets of spiral wings (7) are juxtaposed to form a spiral wing (on the head (10, 11, 12) side of the plurality of sets of spiral wings (7) of the rod (1)). 7) The diameter (D1) of the spiral wing (7) on the proximal end side of the rod (1) is made larger than the diameter (D1) of 7), and a pair of adjacent heads (10, 11, 12) The diameter (D16) of the tip wing (16) of the head (10, 11, 12) is the same or smaller than the diameter (D1) of the spiral wing (7). It was.

請求項１〜２の考案では、ロッド（１，２）の螺旋拡翼（７）の形態の改良により、掘削後に杭を抜き取らない場合に、ロッド（１，２）の長手方向（回転中心線１ａの方向）の抵抗力が大きくなって支持機能を高めることができる。 In the device of claim 1 or 2, when the pile is not removed after excavation by improving the shape of the spiral blade (7) of the rod (1, 2), the longitudinal direction (rotation center line) of the rod (1, 2) The resistance in the direction 1a) can be increased and the support function can be enhanced.

請求項２の考案を前提とする請求項３の考案において、例えば図６，８に示すように、前記ロッド（１）の回転中心線（１ａ）に沿って互いに隣接する両組の螺旋拡翼（７）において、頭部（１０，１１，１２）側の一組の螺旋拡翼（７）の直径（Ｄ１）よりもロッド（１）の基端側の一組の螺旋拡翼（７）の直径（Ｄ１）を大きくした。請求項３の考案では、ロッド（１）の回転中心線（１ａ）に沿って並ぶ各組の螺旋拡翼（７）の直径（Ｄ１）が頭部（１０，１１，１２）側からロッド（１）の基端側へ向うに従い次第に大きくなるため、掘削後に杭を抜き取らない場合にロッド（１，２）の長手方向の抵抗力が大きくなって支持機能を高めることができるばかりではなく、逆に、ロッド（１）の回転中心線（１ａ）に沿って並ぶ各組の螺旋拡翼（７）の直径（Ｄ１）がロッド（１）の基端側から頭部（１０，１１，１２）側へ向うに従い次第に小さくなるため、掘削抵抗が小さくなる。 A device according to claim 3 premised on the device according to claim 2, for example, as shown in FIGS. 6 and 8, both sets of spiral wings adjacent to each other along the rotation center line (1a) of the rod (1). In (7), a set of spiral wings (7) on the proximal side of the rod (1) rather than the diameter (D1) of the set of spiral wings (7) on the head (10, 11, 12) side The diameter (D1) was increased. In the invention of claim 3, the diameter (D1) of each set of the spiral expansion blades (7) arranged along the rotation center line (1a) of the rod (1) is changed from the head (10, 11, 12) side to the rod ( 1) Since it gradually increases as it goes to the base end side, the resistance in the longitudinal direction of the rods (1, 2) increases when the piles are not removed after excavation, so that the support function can be improved. Further, the diameter (D1) of each set of spiral wings (7) arranged along the rotation center line (1a) of the rod (1) is the head (10, 11, 12) from the base end side of the rod (1). Since it gradually becomes smaller toward the side, excavation resistance becomes smaller.

請求項２または請求項３の考案を前提とする請求項４の考案にかかる前記各組の螺旋拡翼（７）は例えば図１，６，８に示すようにロッド（１）の回転中心線（１ａ）に対し傾斜した一対の翼板（８，９）からなり、ロッド（１）の回転中心線（１ａ）に沿って互いに隣接する両組の螺旋拡翼（７）において、頭部（１０，１１，１２）側の一組の螺旋拡翼（７）の両翼板（８，９）と、ロッド（１）の基端側の一組の螺旋拡翼（７）の両翼板（８，９）とのうち、ロッド（１）の回転中心線（１ａ）の方向で互いに隣接する一方の両翼板（８）間と、ロッド（１）の回転中心線（１ａ）の方向で互いに隣接する他方の両翼板（９）間とで螺旋溝（６）を形成した。請求項４の考案では、各組の螺旋拡翼（７）における一対の翼板（８，９）により、螺旋溝（６）を容易に形成することができる。 Each set of helical wings (7) according to the invention of claim 4 premised on the invention of claim 2 or claim 3 is a center line of rotation of the rod (1) as shown in FIGS. In both sets of spiral expansion blades (7), which are composed of a pair of blades (8, 9) inclined with respect to (1a) and are adjacent to each other along the rotation center line (1a) of the rod (1), Both blade plates (8, 9) of a set of spiral wings (7) on the side of 10, 11, 12) and both blade plates (8) of a set of spiral wings (7) on the proximal side of the rod (1) 9), between the two blades (8) adjacent to each other in the direction of the rotation center line (1a) of the rod (1), and adjacent to each other in the direction of the rotation center line (1a) of the rod (1). A spiral groove (6) was formed between the other blade plates (9). According to the fourth aspect of the present invention, the spiral groove (6) can be easily formed by the pair of blades (8, 9) in each set of spiral expansion blades (7).

請求項２から請求項４のうちいずれか一つの請求項の考案を前提とする請求項５の考案においては、例えば図１，３〜５，６，８に示すように、前記ロッド（１）の先端側に対し前記頭部（１０，１１，１２）を着脱可能に連結した。請求項５の考案では、ロッド（１）と頭部（１０，１１，１２）とのうち一方または両方を交換することができる。 In the device of claim 5 premised on the device of any one of claims 2 to 4, the rod (1) as shown in FIGS. The heads (10, 11, 12) were detachably connected to the distal end side of the. In the invention of claim 5, one or both of the rod (1) and the head (10, 11, 12) can be exchanged.

請求項６の考案においては、例えば図１〜９に示すように、互いに形態の異なる複数のロッド（１，２）と、互いに形態の異なる複数の頭部（１０，１１，１２）とを備え、各ロッド（１，２）は請求項５の考案に記載の杭におけるロッド（１）を含み、各頭部（１０，１１，１２）は請求項５の考案に記載の杭における頭部（１０，１１，１２）を含み、各ロッド（１，２）のうちいずれか一つのロッド（１，２）の先端側に対し、各頭部（１０，１１，１２）のうちいずれか一つの頭部（１０，１１，１２）を着脱可能に連結し得る。請求項６の考案では、請求項５の考案に記載の杭におけるロッド（１）を含む複数のロッド（１，２）と、請求項５の考案に記載の杭における頭部（１０，１１，１２）を含む複数の頭部（１０，１１，１２）とを任意に組み合わせた多機能の杭を得ることができる。 In the invention of claim 6, for example, as shown in FIGS. 1 to 9, a plurality of rods (1, 2) having different forms and a plurality of heads (10, 11, 12) having different forms are provided. Each rod (1, 2) includes a rod (1) in a pile according to the invention of claim 5, and each head (10, 11, 12) is a head in a pile according to the invention of claim 5 ( 10, 11, 12), and any one of the heads (10, 11, 12) with respect to the tip side of any one of the rods (1, 2). The heads (10, 11, 12) can be detachably connected. In the invention of claim 6, a plurality of rods (1, 2) including the rod (1) in the pile according to the invention of claim 5, and a head (10, 11, Multifunctional piles can be obtained by arbitrarily combining a plurality of heads (10, 11, 12) including 12).

請求項６の考案を前提とする請求項７の考案において、例えば図２，３〜５，７，９に示すように、前記各ロッド（１，２）は、各組の螺旋拡翼（７）の直径（Ｄ２）を同一にしたロッド（２）を含む。請求項７の考案では、請求項５の考案に記載の杭におけるロッド（１）や各組の螺旋拡翼（７）の直径（Ｄ２）を同一にしたロッド（２）を含む複数のロッド（１，２）と、請求項５の考案に記載の杭における頭部（１０，１１，１２）を含む複数の頭部（１０，１１，１２）とを任意に組み合わせた多機能の杭を得ることができる。 In the device of claim 7, which presupposes the device of claim 6, as shown in FIGS. 2, 3 to 5, 7, and 9, for example, each of the rods (1, 2) has a set of helical expansion blades (7 ) Includes a rod (2) having the same diameter (D2). In the invention of claim 7, a plurality of rods including rods (2) having the same diameter (D2) of the rods (1) and the spiral expansion blades (7) of each set in the pile according to the invention of claim 5 1, 2) and a multi-functional pile in which a plurality of heads (10, 11, 12) including the heads (10, 11, 12) in the pile according to the invention of claim 5 are arbitrarily combined. be able to.

本考案は、掘削後に支持機能を高め得る杭を提供することができる。また、掘削後に支持機能を高め得る杭を含む多機能の杭として使い分けることができる杭も提供することができる。 The present invention can provide a pile that can enhance the support function after excavation. Moreover, the pile which can be used properly as a multifunctional pile including the pile which can improve a support function after excavation can also be provided.

（ａ）は本実施形態にかかる杭において第一のロッドを示す正面図であり、（ｂ）は同じく側面図である。(A) is a front view which shows a 1st rod in the pile concerning this embodiment, (b) is a side view similarly. （ａ）は本実施形態にかかる杭において第二のロッドを示す正面図であり、（ｂ）は同じく側面図である。(A) is a front view which shows a 2nd rod in the pile concerning this embodiment, (b) is a side view similarly. （ａ）は本実施形態にかかる杭において第一の頭部を示す正面図であり、（ｂ）は同じく側面図であり、（ｃ）は同じく底面図である。(A) is a front view which shows a 1st head in the pile concerning this embodiment, (b) is a side view similarly, (c) is a bottom view similarly. （ａ）は本実施形態にかかる杭において第二の頭部を示す正面図であり、（ｂ）は同じく側面図であり、（ｃ）は同じく底面図である。(A) is a front view which shows a 2nd head in the pile concerning this embodiment, (b) is a side view similarly, (c) is a bottom view similarly. （ａ）は本実施形態にかかる杭において第三の頭部を示す正面図であり、（ｂ）は同じく側面図であり、（ｃ）は同じく底面図である。(A) is a front view which shows a 3rd head in the pile concerning this embodiment, (b) is a side view similarly, (c) is a bottom view similarly. （ａ）は上記の第一のロッドに上記の第一の頭部を着脱可能に連結した杭を示す正面図であり、（ｂ）は上記の第一のロッドに上記の第二の頭部を着脱可能に連結した杭を示す正面図であり、（ｃ）は上記の第一のロッドに上記の第三の頭部を着脱可能に連結した杭を示す正面図である。(A) is a front view which shows the pile which connected said 1st head to said 1st rod so that attachment or detachment was possible, (b) was said 2nd head above said 1st rod It is a front view which shows the pile which connected detachably, and (c) is a front view which shows the pile which connected said 3rd head to said 1st rod so that attachment or detachment was possible. （ａ）は上記の第二のロッドに上記の第一の頭部を着脱可能に連結した杭を示す正面図であり、（ｂ）は上記の第二のロッドに上記の第二の頭部を着脱可能に連結した杭を示す正面図であり、（ｃ）は上記の第二のロッドに上記の第三の頭部を着脱可能に連結した杭を示す正面図である。(A) is a front view which shows the pile which connected said 1st head to said 2nd rod so that attachment or detachment was possible, (b) was said 2nd head to said 2nd rod It is a front view which shows the pile which connected detachably, and (c) is a front view which shows the pile which connected said 3rd head to said 2nd rod so that attachment or detachment was possible. （ａ）は上記の第一のロッドに上記の第一の頭部の別例を着脱可能に連結した杭を示す正面図であり、（ｂ）は上記の第一のロッドに上記の第二の頭部の別例を着脱可能に連結した杭を示す正面図であり、（ｃ）は上記の第一のロッドに上記の第三の頭部の別例を着脱可能に連結した杭を示す正面図である。(A) is a front view which shows the pile which connected another example of said 1st head to said 1st rod so that attachment or detachment was possible, (b) is said 2nd to said 1st rod. It is a front view which shows the pile which connected another example of the head of detachably, (c) shows the pile which connected the other example of said 3rd head so that attachment or detachment was possible to said 1st rod. It is a front view. （ａ）は上記の第二のロッドに上記の第一の頭部の別例を着脱可能に連結した杭を示す正面図であり、（ｂ）は上記の第二のロッドに上記の第二の頭部の別例を着脱可能に連結した杭を示す正面図であり、（ｃ）は上記の第二のロッドに上記の第三の頭部の別例を着脱可能に連結した杭を示す正面図である。(A) is a front view which shows the pile which connected another example of said 1st head to said 2nd rod so that attachment or detachment was possible, (b) is said 2nd to said 2nd rod, said 2nd It is a front view which shows the pile which connected another example of the head of detachably, (c) shows the pile which connected the other example of said 3rd head so that attachment or detachment was possible to said 2nd rod. It is a front view.

以下、本考案の一実施形態にかかる杭について図面を参照して説明する。
図１に示す第一のロッド１や、図２に示す第二のロッド２については、いずれも、円形の外周面を有する中心軸３でその先端部と基端部とにそれぞれ連結部４，５が取着されている。第一のロッド１及び第二のロッド２の中心軸３の外周には先端部側から基端部側へロッド１，２の回転中心線１ａ，２ａに沿って互いに連続する螺旋溝６を形成するように複数組の螺旋拡翼７が並設されている。各組の螺旋拡翼７はロッド１，２の回転中心線１ａ，２ａに対し傾斜して半円周状に延びる一対の翼板８，９からなる。各翼板８，９の外周縁部は半円形状をなし、ロッド１，２の回転中心線１ａ，２ａに沿って互いに隣接する両組の螺旋拡翼７において、各翼板８，９の周方向両端縁部のうち螺旋方向で互いに連続する両翼板８，９の端縁部は互いに面して交差している。ロッド１，２の回転中心線１ａ，２ａに沿って互いに隣接する両組の螺旋拡翼７において、先端部側の一組の螺旋拡翼７の両翼板８，９と、基端部側の一組の螺旋拡翼７の両翼板８，９とのうち、ロッド１，２の回転中心線１ａ，２ａの方向で互いに隣接する一方の両翼板８間と、ロッド１，２の回転中心線１ａ，２ａの方向で互いに隣接する他方の両翼板９間とで螺旋溝６が形成されている。 Hereinafter, a pile according to an embodiment of the present invention will be described with reference to the drawings.
As for the first rod 1 shown in FIG. 1 and the second rod 2 shown in FIG. 2, each of the central shaft 3 having a circular outer peripheral surface is connected to the distal end portion and the proximal end portion thereof by connecting portions 4, 4 respectively. 5 is attached. A spiral groove 6 is formed on the outer periphery of the central shaft 3 of the first rod 1 and the second rod 2 so as to be continuous with each other along the rotation center lines 1a and 2a of the rods 1 and 2 from the distal end side to the proximal end side. A plurality of sets of spiral expansion blades 7 are arranged in parallel. Each set of spiral wings 7 includes a pair of blades 8 and 9 that are inclined with respect to the rotation center lines 1a and 2a of the rods 1 and 2 and extend in a semicircular shape. The outer peripheral edge of each blade 8, 9 has a semicircular shape, and in both sets of spiral wings 7 adjacent to each other along the rotation center lines 1 a, 2 a of the rods 1, 2, Of the circumferential edge portions, the edge portions of the blades 8 and 9 that are continuous with each other in the spiral direction face each other and intersect each other. In both sets of spiral blades 7 adjacent to each other along the rotation center lines 1a and 2a of the rods 1 and 2, both blade plates 8 and 9 of the pair of spiral blades 7 on the distal end side and the proximal end side Of the two blades 8 and 9 of the pair of spiral expansion blades 7, between the two blade plates 8 adjacent to each other in the direction of the rotation center lines 1 a and 2 a of the rods 1 and 2, and the rotation center line of the rods 1 and 2. A spiral groove 6 is formed between the other blades 9 adjacent to each other in the directions 1a and 2a.

第一のロッド１の回転中心線１ａに沿って互いに隣接する両組の螺旋拡翼７において、先端部側の一組の螺旋拡翼７の直径Ｄ１よりも基端部側の一組の螺旋拡翼７の直径Ｄ１を大きくして、各組の螺旋拡翼７の直径Ｄ１が先端部側から基端部側へ向うに従い次第に大きくなっている。また、第二のロッド２においては、各組の螺旋拡翼７の直径Ｄ２が同一になっている。 In both sets of spiral wings 7 adjacent to each other along the rotation center line 1a of the first rod 1, a set of spirals on the proximal end side than the diameter D1 of the set of spiral wings 7 on the distal end side. The diameter D1 of the expanded blade 7 is increased, and the diameter D1 of the spiral expanded blade 7 of each set gradually increases from the distal end side toward the proximal end side. Moreover, in the 2nd rod 2, the diameter D2 of the spiral expansion blade 7 of each group is the same.

図３に示す第一の頭部１０や、図４に示す第二の頭部１１や、図５に示す第三の頭部１２については、いずれも、円形の外周面を有する頭軸１３の基端部に連結部１４が取着されているとともに、その頭軸１３の先端部端面には頭部１０，１１，１２の回転中心線１０ａ，１１ａ，１２ａ上で刃板１５が取着され、頭軸１３の外周には一対の翼板１７，１８からなる先端拡翼１６が取着されている。各翼板１７，１８は、半円形の外周面を有し、頭部１０，１１，１２の回転中心線１０ａ，１１ａ，１２ａに対し傾斜している。 As for the first head 10 shown in FIG. 3, the second head 11 shown in FIG. 4, and the third head 12 shown in FIG. 5, all of the head shaft 13 having a circular outer peripheral surface. The connecting portion 14 is attached to the base end portion, and the blade plate 15 is attached to the end surface of the distal end portion of the head shaft 13 on the rotation center lines 10a, 11a, 12a of the head portions 10, 11, 12. A tip wing 16 comprising a pair of blades 17 and 18 is attached to the outer periphery of the head shaft 13. Each vane plate 17, 18 has a semicircular outer peripheral surface and is inclined with respect to the rotation center lines 10 a, 11 a, 12 a of the heads 10, 11, 12.

第一の頭部１０の先端拡翼１６においては、半円周状に延びる両翼板１７，１８の周方向両端縁部のうち先端部側の端縁部に複数の掘削爪１９が半径方向へ互いに並んで取着されている。第二の頭部１１の先端拡翼１６においては、半円周状に延びる両翼板１７，１８の周方向両端縁部のうち先端部側の端縁部に複数の掘削爪部２０が半径方向へ互いに並ぶように一体に形成されている。第三の頭部１２の先端拡翼１６においては、半円周状に延びる両翼板１７，１８の周方向両端縁部のうち先端部側の端縁部に掘削刃部２１が半径方向へ延びるように一体に形成されている。 In the tip wing 16 of the first head 10, a plurality of excavation claws 19 are arranged in the radial direction at the end edge on the tip side of both circumferential edges of both wing plates 17, 18 extending in a semicircular shape. They are attached side by side. In the tip wing 16 of the second head 11, a plurality of excavation claws 20 are provided in the radial direction at the end on the tip side of both the circumferential edges of both wing plates 17, 18 extending in a semicircular shape. It is integrally formed to line up with each other. In the tip wing 16 of the third head 12, the excavating blade portion 21 extends in the radial direction at the end edge on the tip side of both the circumferential edges of both wing plates 17, 18 extending in a semicircular shape. Are integrally formed.

図６（ａ）に示す杭は、図１に示す第一のロッド１の先端側連結部４に図３に示す第一の頭部１０の連結部１４を嵌め合わせて各ピン２２により連結したものである。図６（ｂ）に示す杭は、図１に示す第一のロッド１の先端側連結部４に図４に示す第二の頭部１１の連結部１４を嵌め合わせて各ピン２２により連結したものである。図６（ｃ）に示す杭は、図１に示す第一のロッド１の先端側連結部４に図５に示す第三の頭部１２の連結部１４を嵌め合わせて各ピン２２により連結したものである。いずれの杭も、各頭部１０，１１，１２の先端拡翼１６の直径Ｄ１６は、第一のロッド１の各組の螺旋拡翼７のうち、最先端部側の一組の螺旋拡翼７の直径Ｄ１と同一になっているとともに、それ以外の各組の螺旋拡翼７の直径Ｄ１よりも小さくなっている。また、図８（ａ）（ｂ）（ｃ）に示すように、第一のロッド１の各組の螺旋拡翼７のうち、最先端部側の一組の螺旋拡翼７の直径Ｄ１よりも各頭部１０，１１，１２の先端拡翼１６の直径Ｄ１６を小さくしてもよい。 The pile shown in FIG. 6 (a) is connected by connecting each pin 22 by fitting the connecting portion 14 of the first head 10 shown in FIG. 3 to the tip side connecting portion 4 of the first rod 1 shown in FIG. 1. Is. The pile shown in FIG. 6 (b) is connected by connecting each pin 22 by fitting the connecting portion 14 of the second head 11 shown in FIG. 4 to the distal end side connecting portion 4 of the first rod 1 shown in FIG. 1. Is. The pile shown in FIG. 6 (c) is connected by connecting each pin 22 by fitting the connecting portion 14 of the third head 12 shown in FIG. 5 to the tip side connecting portion 4 of the first rod 1 shown in FIG. Is. In any of the piles, the diameter D16 of the tip wing 16 of each of the heads 10, 11, and 12 is a set of spiral wings on the most distal side among the spiral wings 7 of each set of the first rod 1. 7 and the diameter D1 of each of the other sets of spiral expansion blades 7 are the same. Further, as shown in FIGS. 8A, 8B, and 8C, from the diameter D1 of the set of spiral wings 7 on the most distal portion side among the set of spiral wings 7 of the first rod 1. Alternatively, the diameter D16 of the tip wing 16 of each head 10, 11, 12 may be reduced.

図７（ａ）に示す杭は、図２に示す第二のロッド２の先端側連結部４に図３に示す第一の頭部１０の連結部１４を嵌め合わせて各ピン２２により連結したものである。図７（ｂ）に示す杭は、図２に示す第二のロッド２の先端側連結部４に図４に示す第二の頭部１１の連結部１４を嵌め合わせて各ピン２２により連結したものである。図７（ｃ）に示す杭は、図２に示す第二のロッド２の先端側連結部４に図５に示す第三の頭部１２の連結部１４を嵌め合わせて各ピン２２により連結したものである。いずれの杭も、各頭部１０，１１，１２における先端拡翼１６の直径Ｄ１６は、第二のロッド２における各組の螺旋拡翼７の直径Ｄ２よりも小さくなっている。また、図９（ａ）（ｂ）（ｃ）に示すように、各頭部１０，１１，１２における先端拡翼１６の直径Ｄ１６を第二のロッド２における各組の螺旋拡翼７の直径Ｄ２と同一にしてもよい。 The pile shown in FIG. 7A is connected to each of the pins 22 by fitting the connecting portion 14 of the first head 10 shown in FIG. 3 to the tip side connecting portion 4 of the second rod 2 shown in FIG. Is. The pile shown in FIG. 7 (b) is connected by the respective pins 22 by fitting the connecting portions 14 of the second head 11 shown in FIG. 4 to the tip side connecting portions 4 of the second rod 2 shown in FIG. 2. Is. The pile shown in FIG.7 (c) fits the connection part 14 of the 3rd head 12 shown in FIG. 5 to the front end side connection part 4 of the 2nd rod 2 shown in FIG. Is. In any of the piles, the diameter D16 of the tip wing 16 in each head 10, 11, 12 is smaller than the diameter D2 of each set of spiral wings 7 in the second rod 2. Further, as shown in FIGS. 9A, 9B, and 9C, the diameter D16 of the tip wing 16 in each of the heads 10, 11, and 12 is the diameter of each set of spiral wings 7 in the second rod 2. It may be the same as D2.

なお、図６，７，８，９において、第一のロッド１及び第二のロッド２の基端側連結部５には、推進力などの掘削条件に応じて、図示しない別のロッド（例えば、螺旋拡翼を有するロッド、または、螺旋拡翼を有しないロッド）の先端側連結部を各ピン２３により連結することができる。 6, 7, 8, and 9, the base end side connecting portion 5 of the first rod 1 and the second rod 2 has another rod (not shown) (for example, depending on excavation conditions such as propulsive force). , A rod having a spiral wing or a rod not having a spiral wing) can be connected by each pin 23.

図６，７，８，９に示す杭については、正回転させて地盤を掘削した後、逆回転させて抜き取ってもよいが、そのまま抜き取らずに支持用の杭として利用してもよく、ロッド１，２の螺旋拡翼７はロッド１，２の長手方向（回転中心線１ａの方向）の抵抗力となって支持用の杭として機能する。 The piles shown in FIGS. 6, 7, 8 and 9 may be rotated forward and then excavated, and then rotated backwards and removed. However, the piles may be used as support piles without being removed. The spiral blades 7 of 1 and 2 function as a supporting pile as a resistance force in the longitudinal direction of the rods 1 and 2 (direction of the rotation center line 1a).

本実施形態は下記の効果を有する。
（１）ロッド１，２の螺旋拡翼７が頭部１０，１１，１２の先端拡翼１６の直径Ｄ１６に対し大きいまたは同一の直径Ｄ１，Ｄ２を有するようにロッド１，２の螺旋拡翼７の形態を改良したことにより、掘削抵抗を小さくすることができるとともに、掘削後に杭を抜き取らない場合に、ロッド１，２の長手方向の抵抗力が大きくなって支持機能を高めることができる。 This embodiment has the following effects.
(1) The spiral wings of the rods 1 and 2 so that the spiral wings 7 of the rods 1 and 2 have diameters D1 and D2 that are larger than or equal to the diameter D16 of the tip wings 16 of the heads 10, 11, and 12. By improving the form of 7, the excavation resistance can be reduced, and in the case where the pile is not extracted after excavation, the resistance force in the longitudinal direction of the rods 1 and 2 is increased and the support function can be enhanced.

（２）ロッド１の螺旋拡翼７の直径Ｄ１が頭部１０，１１，１２側からロッド１の基端側へ向うに従い次第に大きくなるため、掘削後に杭を抜き取らない場合にロッド１，２の長手方向の抵抗力が大きくなって支持機能を高めることができるばかりではなく、逆に、ロッド１の螺旋拡翼７の直径Ｄ１がロッド１の基端側から頭部１０，１１，１２側へ向うに従い次第に小さくなるため、掘削抵抗を小さくすることができる。 (2) Since the diameter D1 of the spiral wing 7 of the rod 1 gradually increases from the heads 10, 11, 12 to the base end of the rod 1, Not only can the resistance in the longitudinal direction be increased to enhance the support function, but conversely, the diameter D1 of the spiral wing 7 of the rod 1 increases from the proximal end side of the rod 1 to the heads 10, 11, 12 side. Since it gradually becomes smaller as it goes, excavation resistance can be reduced.

（３）第一のロッド１及び第二のロッド２と頭部１０，１１，１２とを任意に組み合わせることにより、掘削後に支持機能を高め得る杭を含む多機能の杭として使い分けることができる。 (3) By arbitrarily combining the first rod 1 and the second rod 2 and the heads 10, 11, and 12, it can be properly used as a multi-functional pile including a pile that can enhance a support function after excavation.

前記実施形態以外にも例えば下記のように構成してもよい。
・図６または図８に示す第一のロッド１の各螺旋拡翼７や、図７または図９に示す第二のロッド２の各螺旋拡翼７については、頭部１０，１１，１２の先端拡翼１６の直径Ｄ１６よりも小さい直径Ｄ１，Ｄ２を有するものを含んでいてもよく、頭部１０，１１，１２の先端拡翼１６の直径Ｄ１６に対し大きい直径Ｄ１，Ｄ２または同一の直径Ｄ１，Ｄ２を有するものを含んでいれば、ロッド１，２の長手方向の抵抗力が大きくなって支持機能を高めることができる。 For example, the following embodiment may be configured as follows.
For each spiral wing 7 of the first rod 1 shown in FIG. 6 or FIG. 8 and each spiral wing 7 of the second rod 2 shown in FIG. 7 or FIG. One having diameters D1, D2 smaller than the diameter D16 of the tip wing 16 may be included, and the diameters D1, D2 larger than the diameter D16 of the tip wing 16 of the heads 10, 11, 12 or the same diameter may be included. If one having D1 and D2 is included, the resistance force in the longitudinal direction of the rods 1 and 2 is increased, and the support function can be enhanced.

・第一のロッド１の先端側または第二のロッド２の先端側に頭部１０，１１，１２を各ピン２２により着脱可能に連結したが、これらを互いに着脱不能に取着してもよい。 The heads 10, 11, and 12 are detachably connected to the distal end side of the first rod 1 or the distal end side of the second rod 2 by the respective pins 22, but they may be detachably attached to each other. .

１，２…ロッド、１ａ，２ａ…ロッドの回転中心線、６…螺旋溝、７…螺旋拡翼、８，９…翼板、１０，１１，１２…頭部、１６…先端拡翼、Ｄ１，Ｄ２，Ｄ１６…直径。 DESCRIPTION OF SYMBOLS 1, 2 ... Rod, 1a, 2a ... Rod rotation center line, 6 ... Spiral groove, 7 ... Spiral expansion blade, 8, 9 ... Blade plate, 10, 11, 12 ... Head, 16 ... Tip expansion blade, D1 , D2, D16 ... Diameter.

Claims

A head having a tip expanding blade is provided on the tip end side of the rod, and a spiral groove is formed on the outer periphery of the rod so as to form a spiral groove along the rotation center line of the rod from the head side to the base end side of the rod. The wings are arranged side by side, and the diameter of all or part of the spiral wing of this rod is set to be larger than the diameter of the tip wing of this head or the same as the diameter of the tip wing of this head Pile characterized by being set.

A head having a tip wing is provided on the tip end side of the rod, and a plurality of sets are formed on the outer periphery of the rod so as to form a spiral groove along the rotation center line of the rod from the head side to the base end side of the rod. The diameter of the spiral expansion blade on the base end side of the rod is made larger than the diameter of the spiral expansion blade on the head side of the plurality of sets of spiral expansion blades of the rod, and the head A pile having the same or smaller diameter at the tip of the head than the diameter of a pair of spiral wings adjacent to the head.

In both sets of spiral wings adjacent to each other along the rotation center line of the rod, the diameter of the set of spiral wings on the base end side of the rod is larger than the diameter of the set of spiral wings on the head side. The pile according to claim 2, wherein the pile is made.

Each set of spiral wings consists of a pair of blades inclined with respect to the rotation center line of the rod, and in both sets of spiral wings adjacent to each other along the rotation center line of the rod, Of the two blades of the spiral expansion blade and the pair of spiral expansion blades on the base end side of the rod, between the two blades adjacent to each other in the direction of the rotation center line of the rod, and the rotation center line of the rod The pile according to claim 2 or 3, wherein a spiral groove is formed between the other blades adjacent to each other in the direction of.

The pile according to any one of claims 2 to 4, wherein the head is detachably connected to a tip side of the rod.

A plurality of rods having different forms from each other and a plurality of heads having different forms from each other, each rod including a rod in the pile according to claim 5, each head being a head in the pile according to claim 5. The pile which can connect any one head among each head so that attachment or detachment is possible with respect to the front end side of any one rod among each rod.

The pile according to claim 6, wherein each rod includes a rod having the same diameter of each set of spiral wings.