JP2016130389A - Connector between pile and single pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector that firmly connects a single pipe to a pile in a simple step, thereby forming a long pile without losing a function as a pile.SOLUTION: A connector between a pile and a single pipe includes a positioning member 10 having a cylindrical form of an almost a same outer diameter as a pile 2, and a fixing member 20 having edge parts 21, 21 to be inserted into the pile 2 and a single pipe 3 and coming into contact internally with an inner surface 2a of the pile 2 and an inner surface 3a of the single pipe, for fixing the pile 2 and the single pipe 3. The fixing member 20 is fitted on the positioning member 10 such that the fixing member projects toward an opposite direction of the positioning member 10 in an axial direction, and is formed to generate pressing force that presses the inner surface of the pile 2 and the single pipe 3 outward when inserted into the pile 2 and the single pipe 3. The positioning member 10 regulates an insertion length when the fixing member 20 is inserted into the pile 2 and the single pipe 3.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a connector for connecting a single pipe to a pile used to embed in the ground and support a building member.

  Piles used to support building components by burying them underground in construction work sites are used for temporary structures such as handrails, fences, and solar panels, and are indispensable. Building material. When piles are laid and laid in the soil, there is a case where it is desired to increase the length of burial without obtaining an appropriate earth pressure. Conventionally, such cases are dealt with by once pulling out a pile and replacing it with a long pile. However, it is not efficient to prepare a plurality of types of piles having different lengths or to strike the pile again. Moreover, in order to drive a long pile, it was necessary to hit a stepladder or the like, and there was a problem in work safety. In addition, a person holding the pile was necessary, and the work efficiency was not good.

  Therefore, it is conceivable to connect a single pipe to the pile to make a long pile. Conventionally, it has been practiced to weld a single pipe to a pile at the work site to make a long pile, but the work efficiency is not good. It is also conceivable to connect a single pipe to a pile using a connector. As a connector for connecting a single pipe to a pile, for example, as shown in Patent Document 1, halved metal fittings arranged opposite to each other are inserted into a pipe, and the space between the half metal fittings is widened by bolts. A connector that is pressed against and fixed to the inner peripheral surface of the single pipe and an outer diameter larger than the outer diameter of the pile, as disclosed in Patent Document 2, and an inner diameter smaller than the inner diameter of the pile. It is conceivable to use a connecting member made of a cylindrical member having an annular groove that is formed in a cylindrical body having an annular groove that is recessed in an annular direction in the cylindrical axis direction and into which an end of a pile can be fitted.

Japanese Utility Model Publication No. 5-34245 Japanese Patent Laid-Open No. 7-292626

  However, in the connector described in Patent Document 1, since the half-shaped metal fitting cannot be brought into contact with the inner peripheral surface of the single tube with a sufficient area and pressing force, the single tube is firmly fixed to the connector and connected. The force to connect the single pipe to the pile is small. Moreover, since it does not have a structure that can withstand the hammering of pile driving, it is easy to cause disconnection or rattling, and the single pipe cannot be firmly connected to the pile. Moreover, in the coupling tool described in Patent Document 2, it is necessary to form holes in the pile and the single pipe, and it cannot be easily constructed on site. And if a coupling tool as described in patent documents 1 and 2 is used, the part which protrudes outward from the external shape of a pile will be formed. When this projecting part is buried in the soil, it is driven while removing the soil at that part, so the force required for driving increases and the earth pressure applied to the pile decreases, so the pile is firmly fixed Not. Therefore, there exists a possibility that the function as a pile used for supporting a building member or the like cannot be sufficiently achieved.

  Therefore, an object of the present invention is to provide a connector that can firmly connect a single pipe to a pile by a simple process and can form a long pile without impairing the function as the pile.

  The invention according to claim 1 is a connector for connecting a single pipe to a pile, wherein the outer shape of the positioning member is substantially the same as the outer diameter of the pile, and both ends of the pile and the single pipe are connected. And a fixing member for fixing the pile and the single pipe in contact with the inner surface of the pile and the inner surface of the single pipe, respectively, the fixing member extending along the axial direction from the positioning member It is attached to the positioning member in a state of projecting in the opposite direction, and is formed so as to generate a pressing force that presses the inner surface of the pile and single pipe toward the outside when inserted into the pile and single pipe. The positioning member uses a technical means for regulating an insertion length when the fixing member is inserted into a pile and a single pipe.

  According to the first aspect of the present invention, the single pipe can be firmly connected to the pile by a simple process of inserting the fixing member of the connector into the pile and the single pipe. In addition, since the part protruding outward from the outer shape of the pile is not formed, the force required for driving the pile does not increase, and sufficient soil pressure is loaded on the pile, and the function as a pile may be impaired. Not long stakes can be formed.

  According to a second aspect of the present invention, in the connector of the first aspect, the fixing member is a virtual cylinder having an inner diameter set larger than an inner diameter of a target to be inserted among piles or single pipes and smaller than an outer diameter. Assumed, a technical means is used that is formed so as to be inscribed in the virtual cylinder.

  By forming the fixing member as in the second aspect of the invention, it is possible to apply an appropriate pressing force to the pile and the single pipe. Thereby, there is no possibility that an excessive pressing force is applied and a large deformation occurs in the pile and the single pipe, or that the pressing force is insufficient and a strong connection cannot be made.

  According to a third aspect of the present invention, in the connector according to the first or second aspect, the positioning member includes a penetrating portion penetrating in the axial direction, and the fixing member is disposed through the penetrating portion. The technical means is used.

  According to the third aspect of the present invention, the connector can be manufactured by a simple process of arranging the fixing member so as to penetrate the penetrating portion of the positioning member.

  According to a fourth aspect of the present invention, in the connector according to any one of the first to third aspects, the fixing member includes an engaging portion that engages with the positioning member. Use means.

  According to the fourth aspect of the present invention, the fixing member can be easily and accurately positioned by simply engaging the fixing member with the positioning member at the engaging portion. Further, even when a large striking force is applied to the fixing member, the engaging member can be engaged with the positioning member and receive a striking force, so that the fixing member does not come off from the positioning member, and is not deformed or destroyed. .

  According to a fifth aspect of the present invention, in the connector according to any one of the first to fourth aspects, the fixing member has a cross section perpendicular to the insertion direction into the pile and the single pipe, from the center. The technical means that it is formed so as to be radially spread in a plurality of directions is used.

  According to the fifth aspect of the present invention, the pressing force can be generated by isotropically abutting the fixing member with the pile and the single pipe at a plurality of locations, so that the pressing force does not occur greatly. Can be increased and can be firmly connected.

  According to a sixth aspect of the present invention, in the connector according to the fifth aspect, the fixing member is composed of a plurality of plate-like members, and the portions facing the portion that contacts the inner surface of the pile or the inner surface of the single pipe The technical means that is arranged in a state having a gap is used.

  According to invention of Claim 6, a fixing member can be made into the structure which has moderate rigidity. Thereby, it is easy to insert the fixing member into the pile and the single pipe, and an excessive pressing force that greatly deforms the pile and the single pipe is not generated. Further, even when the roundness of the inner surface of the pile or single pipe is not good, it is preferable because the shape difference from the fixing member can be absorbed and inscribed along the inner surface shape.

It is explanatory drawing which shows the structure of the coupling tool of this invention. 1 (A) is a perspective view, FIG. 1 (B) is a plan view as seen from the direction of pile insertion, FIG. 1 (C) is a side view, and FIG. 1 (D) is a cross-sectional view taken along line AA in FIG. FIG. It is sectional drawing which shows the virtual cylinder for demonstrating the shape of a fixing member. It is explanatory drawing which shows the connection method of the pile and single pipe | tube using the coupling tool of this invention. It is explanatory drawing which shows the example of a change of a coupling tool.

  A connector for a pile and a single pipe according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, the connector 1 includes a positioning member 10 and a fixing member 20. When the pile 2 and the single pipe 3 (FIG. 3) are embedded in the soil up to the single pipe 3, the outer diameter is the same in order to generate an appropriate earth pressure to hold the pile firmly. In this embodiment, the same inner diameter is used.

  The positioning member 10 is formed in a cylindrical shape whose outer shape is substantially the same as the outer diameter K <b> 1 (FIGS. 2 and 3) of the pile 2. In the present embodiment, the positioning member 10 has a short cylindrical shape in which the outer diameter D1 is substantially the same as the outer diameter K1 of the pile 2 and the inner diameter D2 is smaller than the inner diameter K2 (FIGS. 2 and 3) of the pile 2 and the single tube 3. Is formed. The positioning member 10 regulates the insertion length of each of the pile 2 and the single pipe 3 when the fixing member 20 is inserted into the pile 2 and the single pipe 3.

The fixing member 20 inserts the end portions 21 and 21 into the pile 2 and the single pipe 3 each having an opening, and inscribes the pile 2 and the single pipe 3 in contact with the inner surface 2a of the pile 2 and the inner surface 3a (FIG. 3). It is a member for fixing the tube 3. The fixing member 20 is attached by a method such as welding while being inserted into the positioning member 10 and projecting from the positioning member 10 in the opposite direction along the axial direction. One of the portions protruding from the positioning member 10 on both sides is inserted into the pile 2 and the other is inserted into the single pipe 3.

In the present embodiment, the fixing member 20 is composed of three plate-like members 22. The plate-like member 22 is provided with an engaging portion 22 a that is cut out in a rectangular shape at the center in the longitudinal direction and formed to engage with the positioning member 10. In the present embodiment, the three plate-like members 22 are engaged with the positioning member 10 by the engaging portions 22a and are arranged radially at intervals of 120 ° around the longitudinal direction, and the gap G is maintained at a predetermined interval. Thus, it is fixed by a plurality of welds 23. Thus, the fixing member 20 is formed so that the cross section perpendicular to the insertion direction to the pile 2 and the single pipe 3 has a shape radially extending from the center in a plurality of directions. Since the pressing force can be generated by isotropically contacting the single pipe 3 at a plurality of locations, the pressing force can be increased without causing a large deformation and can be firmly connected. . Here, it is preferable not to form the welded portion 23 at the tip of the plate-like member 22 so that the fixing member 20 can be easily inserted into the pile 2 and the single pipe 3. Moreover, the fixing member 20 can be made into a firm coupling | bonding by fixing to the positioning member 10 in the engaging part 22a by overlay welding.

Here, the fixing member 20 is dimensioned such that a sufficient pressing force can be applied to the pile 2 and the single pipe 3 and the fixing member 20 can be firmly fixed, and an excessive force is applied so that a large deformation does not occur. . This is because if excessive force is applied to the pile 2 and the single pipe 3 and a large deformation occurs, the pile 2 or the single pipe 3 may be broken or an appropriate earth pressure may not be obtained when the pile is driven. . When the fixing member 20 is assumed to be a virtual cylinder E having an inner diameter D3 set larger than the inner diameter K2 of the pile 2 and the single pipe 3 and smaller than the outer diameter K1, as shown in FIG. It is formed so as to be inscribed in. By forming the fixing member 20 in the above-described shape, when the fixing member 20 is inserted into the pile 2 and the single pipe 3, respectively, the fixed member 20 comes into contact with the inner surface 2a of the pile 2 and the inner surface 3a of the single pipe 3, and is appropriately pushed outward. Pressure can be generated. Thereby, there is no possibility that an excessive pressing force is applied and the pile 2 and the single pipe 3 are greatly deformed, or the pressing force is insufficient and a strong connection cannot be performed.

In addition, the length L of the portion where the fixing member 20 protrudes from the positioning member 10 on both sides is set such that no rattling occurs when the fixing member 20 is inserted into the pile 2 and the single pipe 3 and fixed. For example, it is preferable to set the outer diameter K1 of the pile 2 to about 2-3 times.

A chamfered portion 22 b is formed at the outer end of the plate-like member 22 so that the fixing member 20 can be easily inserted into the pile 2 and the single pipe 3.

Next, a method for connecting a pile and a single pipe using the connector 1 will be described.

First, the tip of the pile 2 is driven into the soil to such an extent that it does not wobble even when hit.

Next, as shown in FIG. 3A, one end 21 of the fixing member 20 of the connector 1 is inserted into the pile 2. By striking with the chamfered portion 22b in a state where the tip enters the inside of the pile 2, the end portion 21 can be inserted into the pile 2 and the single pipe 3 without being bent or inserted in a straight state. Moreover, since the edge part of the plate-shaped member 22 is not being fixed, since it bends inward in the initial stage of insertion, it is easy to insert.

Subsequently, when the fixing member 20 is driven into the inside of the pile 2 as shown in FIG. 3B, the outer dimension of the fixing member 20 is slightly larger than the inner diameter of the pile 2, so that it goes outward toward the inner surface of the pile 2. A pressing force is applied. Thereby, one end of the fixing member 20 of the connector 1 is fixed to the pile 2.

  Here, since the gap G is provided between the plate-like members 22 of the fixing member 20, the structure has an appropriate rigidity and can be easily inserted into the pile 2 and the single pipe 3. An excessive pressing force that causes deformation is not generated. Moreover, even when the roundness of the inner surface of the pile 2 or the single pipe 3 is not good, it is preferable because the shape difference from the fixing member 20 can be absorbed and inscribed along the inner surface shape.

The connecting tool 1 may be driven until all the fixing members 20 projecting to one side are inserted into the piles 2 and the positioning members 10 are in contact with the ends of the piles 2, or the fixing members 20 do not rattle. It may be in a state of being driven into.

Subsequently, as shown in FIG. 3C, the single pipe 3 is guided to the other end 21 of the fixing member 20, the single pipe 3 is hit, and the fixing member 20 is embedded in the single pipe 3. Then, it is driven until the end face comes into contact with the positioning member 10. As a result, a pressing force directed outward is applied to the inner surface of the single tube 3, and the other end of the fixing member 20 of the connector 1 is fixed to the single tube 3. And as shown in FIG.3 (D), the pile 2 and the single pipe 3 are connected with the connector 1, and the connection pile 4 which length increased is formed.

As described above, the pile 2 and the single pipe 3 can be connected to each other without a strong rattling by a simple process of driving the fixing member 20 of the connector 1. Since the pile 2 and the single pipe 3 are connected by being fixed via the fixing member 20, they can be connected in a straight line.

The positioning member 10 is formed to be substantially the same as the outer diameter of the pile 2, and even if the fixing member 20 is driven, the pile 2 and the single pipe 3 are not greatly deformed and there is no portion projecting outward. In addition, even if the connection tool 1 is driven until it is buried in the soil, the force required for driving does not increase, and the pile can be driven in a state where a sufficient earth pressure is applied to the buried part. The connected pile 4 does not wobble.

Moreover, since the pile 2 can be driven into the soil to some extent and then the single pipe 3 can be connected and lengthened, it can be hit on a stepladder or a person who holds the pile is newly required. This makes it possible to perform safe and efficient pile driving work.

Further, when the connecting pile 4 is pulled out later, the pile 2 and the single pipe 3 are firmly connected to each other, so that they are not separated and can be pulled out integrally. Thereby, the pile 2 can be reliably recovered without remaining in the soil. The pile 2 and the single pipe 3 can be reused, for example, by cutting while avoiding the portion where the fixing member 20 is inserted.

Here, for comparison, an attempt was made to connect the single pipe 3 to the pile 2 using only the fixing member 20 without providing the positioning member 10. However, when the insertion length of the fixing member 20 is different between the pile 2 and the single pipe 3, or when the single pipe 3 is hit to insert the fixing member 20 into the pile 2 and the single pipe 3, the single pipe 3 side As a result, the phenomenon that the fixing member 20 moves was recognized, and a strong connection could not be realized. That is, the fixing member 20 can be inserted into the pile 2 and the single pipe 3 by a predetermined length by the positioning member 10, and the fixing member 20 does not move even when hitting for pile driving. Therefore, a strong connection can be realized.

Even when a large striking force is applied to the fixing member 20, the plate-like member 22 can be engaged with the positioning member 10 by the engaging portion 22 a and receive the striking force, so that the fixing member 20 is detached from the positioning member 10. No deformation, no destruction. Further, the fixing member 20 can be easily and accurately positioned only by engaging the fixing member 20 with the positioning member 10 by the engaging portion 22a.

(Example of change)
In general, a pile is more expensive than a single pipe, so a single pipe may be driven directly into the soil instead of a so-called pile. In this invention, in order to handle what makes the function as a pile appear as a "pile", the single pipe of such a usage method is considered as a "pile". Moreover, in the above-mentioned embodiment, although the single pipe 3 was connected with the pile, the single pipe 3 can be further connected to this single pipe 3 using the connector 1, and it can be extended to required length.

When the inner diameters of the pile 2 and the single pipe 3 are different from each other, the dimensions of the fixing member 20 can be set according to the inner diameters to connect the piles 2 and the single pipe 3.

The number of the plate-like members 22 is arbitrary as long as the pile 2 and the single pipe 3 can be firmly connected. However, considering the manufacturing cost of the fixing member 20, the striking force for driving into the pile 2 and the single pipe 3, etc. In order to form -4 sheets, in particular to be inscribed in the virtual cylinder E, three sheets are preferable.

  When the force for driving the connecting pile 4 into the soil is small, the positioning member 10 is an annular member having the same inner diameter as the inner diameter D3 of the virtual cylinder E, as shown in the perspective view of FIG. It can also be set as the structure fixed to the positioning member 10 in 22 without forming the engaging part 22a.

  The fixing member 20 can employ various shapes as long as the pile 2 and the single pipe 3 can be firmly fixed. For example, if it can be inserted into the pile 2 and the single pipe 3 and no excessive pressing force is generated, the gap G may not be provided. Further, as shown in the plan view of FIG. 4B, various shapes such as an elliptical shape and a polygonal shape can be employed for the cross section of the fixing member 20. In FIG. 4C, the left figure is a side view, and the right figure is a plan view of the left figure as viewed from above. As shown in FIG. 4C, it is possible to employ a configuration in which the fixing member 20 is formed by arranging flat plates orthogonally.

  FIG. 4D is a plan view showing only the positioning member 10. As shown in FIG. 4D, the plate-like member 22 is not formed with the engaging portion 22 a, and the positioning member 10 is formed with the through-hole 10 a that penetrates the plate-like member 22 in the axial direction and positioned as the fixed member 20. It can also be set as the structure to arrange. According to this, the coupling tool can be manufactured by a simple process in which the fixing member 20 is disposed through the through portion 10a of the positioning member 10.

The positioning member 10 and the fixing member 20 can be integrally formed by casting or the like. In addition, the fixing member 20 can be attached by fitting the engaging portion 22a to the positioning member 10 without welding to the positioning member 10, for example.

(Effect of embodiment)
According to the connection tool 1 of the present invention, the single pipe 3 can be firmly connected to the pile 2 by a simple process, and the long connection pile 4 can be formed without impairing the function as the pile.

A pile having an outer diameter of 48.6 mm, an inner diameter of 43.8 mm (wall thickness of 2.4 mm) and a length of 1000 mm and a single pipe having the same diameter and a length of 1000 mm were prepared and connected by a connector.

The positioning member 10 has an outer shape with an outer diameter of 48.6 mm, an inner diameter of 38.4 mm (wall thickness 5.1 mm), and a length of 15 mm formed in a cylindrical shape.

The fixing member 20 uses three steel plate-like members having a length of 270 mm, a width of 19 mm, and a thickness of 6 mm. The fixing members 20 are arranged radially at intervals of 120 ° from the center of the positioning member 10 and welded to the positioning member 10 at the center in the longitudinal direction. Has been. Each plate-like member is welded to each other at six points, and is fixed with a gap G. The lengths L projecting from the positioning member 10 on both sides are each 125 mm. The engaging portion 22a is formed with a length of 16 mm and a width of 3.5 mm so that it can be fitted into the positioning member 10.

First, in a state where the pile 2 is driven into the soil by about 800 mm from the tip, the connecting tool until the ends of the pile 2 and the single pipe 3 come into contact with the positioning member 10 by the method shown in FIG. 1 was pushed in.

  Thereby, the connection pile 4 of length 2015mm in which the pile 2 and the single pipe 3 were connected with the connecting tool 1 in a straight line was obtained. The pile 2 and the single pipe 3 were not greatly deformed, and could be connected integrally so that the boundaries of the pile 2, the connector 1, and the single pipe 3 could hardly be identified.

Further, it was possible to hit the single pipe 3 and drive it straight into the soil without rattling. There was enough earth pressure after driving in, and it was possible to install it firmly. Moreover, even if it pulled out the pile after that, it was not separated and was able to be pulled out integrally.

Moreover, the endurance test which attaches a hit to the fixing member 20 which is not inserted, and attached the connector 1 to the single pipe 3 was done. Since the single pipe 3 was fixed to the floor surface and hit, the force applied to the connector 1 was much larger than when the pile 2 was driven into the soil, but it was also deformed even after 100 hits. No damage was observed.

DESCRIPTION OF SYMBOLS 1 ... Connector 2 ... Pile 2a ... Inner surface 3 ... Single pipe 3a ... Inner surface 4 ... Connection pile 10 ... Positioning member 10a ... Penetration part 20 ... Fixing member 21 ... End part 22 ... Plate-shaped member 22a ... Engagement part 22b ... Chamfering Part 23 ... Welded part D1 ... Outer diameter D2 of positioning member ... Inner diameter D3 of positioning member ... Inner diameter K1 of imaginary cylinder ... Outer diameter K2 of pile Pile ... Inner diameter E of virtual pile ... Virtual cylinder L ... Fixed member projects from both sides of positioning member Each length

Claims (6)

A connector for connecting a single pipe to a pile,
A positioning member whose outer shape is formed in a columnar shape substantially the same as the outer diameter of the pile,
A fixing member for fixing the pile and the single pipe in contact with the inner surface of the pile and the inner surface of the single pipe, respectively.
The fixing member is attached to the positioning member in a state of protruding in the opposite direction along the axial direction from the positioning member, and when inserted into the pile and the single pipe, the inner surface of the pile and the single pipe respectively It is formed to generate a pressing force that presses outward,
The said positioning member controls the insertion length when the said fixing member is inserted in a pile and a single pipe, The coupling tool characterized by the above-mentioned.   The fixing member is formed so as to be inscribed in the virtual cylinder when assuming a virtual cylinder having an inner diameter set larger than an inner diameter of a target to be inserted among piles or single pipes. The connector according to claim 1, wherein The connector according to claim 1, wherein the positioning member includes a penetrating portion that penetrates in the axial direction, and the fixing member is disposed to penetrate the penetrating portion. 4. The coupling device according to claim 1, wherein the fixing member includes an engaging portion that engages with the positioning member. 5. The said fixing member is formed so that the cross section perpendicular | vertical to the insertion direction to a pile and a single pipe may become the shape which spread radially from the center in multiple directions. A connector according to any one of the above. The said fixing member consists of a some plate-shaped member, and the site | part which opposes the site | part which contact | abuts the inner surface of a pile or the inner surface of a single pipe is arrange | positioned in the state with the space | gap. The connecting tool according to 1.

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