JP5133334B2 - Columnar - Google Patents

Description

  The present invention can be widely applied to a settling method such as a support pile, a landslide pile, a retaining column pile, and a connection between columnar bodies performed in a column of a structure, in particular, a Nakabori method, a soil cement synthetic pile method, Regarding the connection of columnar bodies suitable for connecting columnar bodies in the method of laying columnar bodies by rotary press-fitting and other methods that rotate the columnar bodies during subsidence, such as the rotary buried pile method, for details, see both ends of the columnar bodies. It is related with the columnar body which provided the connection part with respect to an adjacent columnar body in each part, and was comprised so that the said connection part of the columnar body adjacent in the axial center direction of a columnar body was connectable.

  In general, the columnar body is sunk by a hammering method, a pre-boring method inserted into an existing excavation hole, or by rotating and pressing the columnar body while excavating with an auger inserted into the columnar body. There is a going-out digging method, a soil-cement synthetic pile method in which a columnar body is rotationally embedded while creating a soil cement, or a rotary embedded pile method in which a columnar body is simply rotated and press-fitted (embedded). Is often adopted.

  In addition, in the installation work of the columnar body, for the convenience of production, transportation, etc., the columnar body of a standard object is carried to the site, the upper columnar body is suspended from the lower columnar body by the crane and butted, and welded. Construction is carried out while being connected by the method, and a columnar body having a predetermined length is set up. A welding method is used for this connection.

  Since this welding connection is on-site welding, it takes a lot of time and requires a skilled welder, and the quality of the weld is not only affected by the weather, but also the backing ring that accompanies the welding. It is cumbersome and requires a lot of expenses, such as using metal fittings. Therefore, as an alternative to the connection by welding, a method of connecting the upper columnar body and the lower columnar body by a threaded joint has been proposed (see, for example, Patent Documents 1 to 3).

Japanese Utility Model Publication No. 57-133645 Japanese Utility Model Publication No.59-98923 JP-A-4-70414

  However, the connection method using a threaded joint is a method in which the columnar body is laid down by rotary press-fitting, and may be rotated in reverse during construction. In such a case, the screw is loosened. Cannot be adopted.

  The present invention has been made to solve such a problem. Instead of the method of welding the columnar body or screwing, the relative rotation between the upper columnar body and the lower columnar body can be prevented to be integrally rotated. An object of the present invention is to provide a connecting mechanism for columnar bodies that can be combined and can be used for a medium excavation method, a soil cement synthetic pile method, a rotary buried pile method, and the like.

The first characteristic configuration of the present invention is such that a connection portion for an adjacent columnar body is provided at each of both ends of the columnar body, and the connection portions of the columnar bodies adjacent in the axial direction of the columnar body are configured to be connectable. A columnar body, wherein one of both connection portions provided at both ends of the columnar body is formed in a cylindrical portion, and the other is formed in a shaft portion that can be fitted into the cylindrical portion, and adjacent connection portions are connected to each other. The shaft portion is provided with an end surface portion facing the tube portion from the axial direction in a state where the tube portion and the shaft portion of adjacent columnar bodies are fitted to each other. has, provided with a detent mechanism for preventing relative rotation in the fitted axis around the columnar bodies to each other, said detent mechanism also comprises inward from the outer peripheral surface of the cylindrical portion and the base shaft portion, the rotation The stop mechanism is provided on any one of the tube portion and the shaft portion, and on the tube portion and the base. With the operation of forming a recess that opens toward one end side in the axial direction inside the outer peripheral surface of the part, and fitting the cylindrical portion and the axial portion of adjacent columnar bodies together from the axial direction Only a fitting key member that fits into the recess is provided on the other side .

[Action and effect]
According to the first characteristic configuration of the present invention, one of the connection portions provided at both ends of the columnar body is formed in the cylindrical portion, and the other is formed in the shaft portion that can be fitted into the cylindrical portion, and adjacent to each other. Since the connecting parts are formed so that they can be fitted together, and equipped with a rotation prevention mechanism that prevents relative rotation around the axis of the fitted columnar bodies, they can be connected in a state that prevents relative rotation between adjacent columnar bodies. It became possible to do.
In other words, in the construction method in which the columnar bodies facing each other are connected and the columnar bodies are set by rotational press-fitting, even if the columnar bodies are reversely rotated, the rotation prevention mechanism can prevent relative rotation between the columnar bodies. .

  In addition, the shaft portion has a base shaft portion having an end surface portion facing the tube portion from the axial direction in a state in which the tube portion and the shaft portion of the adjacent columnar bodies are fitted to each other, and the rotation preventing mechanism is provided. , Because it is provided on the inner side of the outer peripheral surface of the cylindrical part and the base shaft part, as compared with a configuration in which a fitting convex part and a fitting concave part are formed on the outer peripheral surface of the cylindrical part and the shaft part to prevent rotation. And since the joining line formed in an outer peripheral surface can be decreased, it can make it easy to prevent invasion of water.

Moreover, it became possible to prevent the relative rotation around the axial center of the connected columnar bodies by simple work.
In other words, by moving the columnar bodies in the axial direction and performing the fitting operation to fit the cylindrical portion and the shaft portion while keeping the facing position of the fitting key member in the concave portion, the columnar bodies are adjacent to each other. Relative rotation around the axis of the body can be prevented.

According to a second characteristic configuration of the present invention, the shaft portion is formed in a cylindrical shaft shape, and the concave portion is disposed on the inner peripheral surface side of either the tube portion or the shaft portion. The fitting key member which is provided so as to open over the end surface of the shaft portion and is fitted to the concave portion from the axial direction is provided on the other inner peripheral surface side .

According to the second characteristic configuration of the present invention, it is possible to suitably prevent relative rotation around the axis of the connected columnar bodies.

According to a third characteristic configuration of the present invention, the concave portion is opened to one of the inner peripheral surface side of the cylindrical portion and the outer peripheral surface side of the shaft portion over the end surface of the cylindrical portion or the shaft portion. So that
  The fitting key member that fits in the recess from the axial direction is provided on the other side of the inner peripheral surface side of the cylindrical portion and the outer peripheral surface side of the shaft portion.

  According to a fourth characteristic configuration of the present invention, the fitting key member is constituted by a fitting key member separate from the cylindrical portion and the shaft portion.

  According to the fourth characteristic configuration of the present invention, the forming operation for forming the fitting key member is facilitated as compared with the case where the fitting key member is formed by cutting the cylindrical portion or the shaft portion.

A fifth characteristic configuration of the present invention is such that a connection portion for an adjacent columnar body is provided at each of both end portions of the columnar body, and the connection portions of the columnar bodies adjacent in the axial direction of the columnar body are configured to be connectable. A columnar body, wherein one of both connection portions provided at both ends of the columnar body is formed in a cylindrical portion, and the other is formed in a shaft portion that can be fitted into the cylindrical portion, and adjacent connection portions are connected to each other. The shaft portion is provided with an end surface portion facing the tube portion from the axial direction in a state where the tube portion and the shaft portion of adjacent columnar bodies are fitted to each other. A rotation prevention mechanism that prevents relative rotation of the fitted columnar bodies around the axis of the shaft, and the rotation prevention mechanism is provided on the inner side of the outer peripheral surface of the cylindrical portion and the base shaft portion, and the rotation The stop mechanism includes a fitting step formed by the inner peripheral surface of the cylindrical portion and an outer peripheral surface of the shaft portion. It is formed, and is in place are configured by providing a fitting shaft portion which is fitted in the non rotate relative to the fitting step portion.

According to the fifth characteristic configuration of the present invention, one of the connecting portions provided at both ends of the columnar body is formed in the cylindrical portion, and the other is formed in the shaft portion that can be fitted into the cylindrical portion, and adjacent to each other. Since the connecting parts are formed so that they can be fitted together, and equipped with a rotation prevention mechanism that prevents relative rotation around the axis of the fitted columnar bodies, they can be connected in a state that prevents relative rotation between adjacent columnar bodies. It became possible to do.
In other words, in the construction method in which the columnar bodies facing each other are connected and the columnar bodies are set by rotational press-fitting, even if the columnar bodies are reversely rotated, the rotation prevention mechanism can prevent relative rotation between the columnar bodies. .
In addition, the shaft portion has a base shaft portion having an end surface portion facing the tube portion from the axial direction in a state in which the tube portion and the shaft portion of the adjacent columnar bodies are fitted to each other, and the rotation preventing mechanism is provided. , Because it is provided on the inner side of the outer peripheral surface of the cylindrical part and the base shaft part, as compared with a configuration in which a fitting convex part and a fitting concave part are formed on the outer peripheral surface of the cylindrical part and the shaft part to prevent rotation. And since the joining line formed in an outer peripheral surface can be decreased, it can make it easy to prevent invasion of water.
Moreover, the relative rotation around the axis of the columnar bodies can be prevented by the fitting operation by the close movement of the columnar bodies.

  According to a sixth characteristic configuration of the present invention, an inner peripheral surface forming the fitting step portion and an outer peripheral surface forming the fitting shaft portion are formed in a polygonal shape when viewed in the axial direction.

  According to the sixth characteristic configuration of the present invention, the relative rotation of the columnar bodies around the axis can be suitably prevented by the fitting operation by the close movement of the columnar bodies.

  In a seventh characteristic configuration of the present invention, an inner peripheral surface forming the fitting step portion and an outer peripheral surface forming the fitting shaft portion are formed in a point-symmetric polygonal shape as viewed in the axial direction. It is in.

  According to the seventh characteristic configuration of the present invention, even if the opposing position of the fitting shaft portion with respect to the fitting step portion is shifted and does not fit, the fitting shaft portion remains in contact with the fitting step portion. Both of them can be fitted and connected by rotating one of the columnar bodies.

  In an eighth characteristic configuration of the present invention, an inner peripheral surface forming the fitting step portion and an outer peripheral surface forming the fitting shaft portion are formed in an asymmetric polygonal shape as viewed in the axial direction. is there.

  According to the 8th characteristic structure of this invention, since it fits only in the fixed position, it becomes convenient when the direction of columnar bodies wants to match.

  The ninth characteristic configuration of the present invention is such that a connection portion for an adjacent columnar body is provided at each of both end portions of the columnar body, and the connection portions of the columnar bodies adjacent in the axial direction of the columnar body are configured to be connectable. A columnar body, wherein one of both connection portions provided at both ends of the columnar body is formed in a cylindrical portion, and the other is formed in a shaft portion that can be fitted into the cylindrical portion, and adjacent connection portions are connected to each other. The shaft portion has a base shaft portion provided with an end surface portion facing the tube portion from the axial direction in a state where the tube portion and the shaft portion of adjacent columnar bodies are fitted to each other. The end surface portion is provided with a circumferential groove-like joint recess for fitting the tip portion of the annular tube portion in a state where the tube portion and the shaft portion of the adjacent columnar bodies are fitted to each other. And a rotation preventing mechanism that prevents relative rotation of the fitted columnar bodies around the axis of the shaft. Is a concave portion that can communicate with the base shaft portion and the tube portion distal end portion in a state where the cylindrical portion and the shaft portion of adjacent columnar bodies are fitted to each other, and an outer peripheral side of the base shaft portion. A fitting key member that is inserted through the recess and whose distal end in the insertion direction is fixed to the base shaft portion is provided.

According to the ninth characteristic configuration of the present invention, one of the connection portions provided at both ends of the columnar body is formed in the cylindrical portion, and the other is formed in the shaft portion that can be fitted into the cylindrical portion, and adjacent to each other. Since the connecting parts are formed so that they can be fitted together, and equipped with a rotation prevention mechanism that prevents relative rotation around the axis of the fitted columnar bodies, they can be connected in a state that prevents relative rotation between adjacent columnar bodies. It became possible to do.
In other words, in the construction method in which the columnar bodies facing each other are connected and the columnar bodies are set by rotational press-fitting, even if the columnar bodies are reversely rotated, the rotation prevention mechanism can prevent relative rotation between the columnar bodies. .
In addition, the fitting key member can prevent relative rotation of the columnar bodies around the axis, and can also have a function of preventing the columnar bodies from coming off.

It is a half cut side view which shows 1st Example of this invention. FIG. 2 is a half sectional plan view taken along line II-II in FIG. 1. FIG. 3 is a half sectional plan view taken along line III-III in FIG. 1. It is the half part sectional side view which separated and showed the edge part of the upper columnar body and the lower columnar body. It is an expanded sectional side view of the engaging part by an arc key. It is a half cut side view which shows 2nd Example of this invention. It is a half cut side view which shows 3rd Example of this invention. It is explanatory drawing which shows 4th Example of this invention. It is explanatory drawing which shows 5th Example of this invention. It is explanatory drawing which shows 6th Example of this invention. It is explanatory drawing which shows another form of 6th Example of this invention. It is explanatory drawing which shows 7th Example of this invention. It is explanatory drawing which shows 8th Example of this invention. It is explanatory drawing which shows 9th Example of this invention. It is explanatory drawing which shows 10th Example of this invention. It is explanatory drawing which shows 11th Example of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 show a first embodiment of the columnar body according to the present invention, FIG. 6 shows the second embodiment, FIG. 7 shows the third embodiment, and FIG. 9 shows the fifth embodiment, FIG. 10 shows the sixth embodiment, FIG. 11 shows another form of the sixth embodiment, and FIG. 12 shows the seventh embodiment. 13 shows the eighth embodiment, FIG. 14 shows the ninth embodiment, FIG. 15 shows the tenth embodiment, and FIG. 16 shows the eleventh embodiment. It is.

  First, the first embodiment will be described. 1 to 5, A1 is a steel pipe columnar body that is an upper columnar body, and A2 is a steel pipe columnar body that is a lower columnar body. The upper columnar body A1 is provided with a female cylindrical portion 1 (an example of a columnar body connecting portion) protruding downward by welding 3 at the lower end coupled to the lower columnar body A2, and the lower columnar body A2 includes A shaft portion 2 (an example of a columnar body connecting portion) that enters and fits into the cylindrical portion 1 is provided at the upper end coupled to the upper columnar body A1 so as to protrude upward by welding 3.

  The cylindrical portion 1 has a cylindrical shape whose outer diameter is the same as the outer diameter of the steel pipe columnar bodies (upper columnar body, lower columnar body) A1 and A2, and the shaft portion 2 described later is fitted to the inner periphery thereof. A circumferential groove 5 is formed in the stepped portion 1D formed on the base end side of the cylindrical portion 1 on the cylindrical inner peripheral surface 4 that is formed on the vertical inner peripheral surface 4 to be joined. A plurality of inner groove portions 6 are provided around the inner circumferential surface 4 of the cylinder portion at intervals in the vertical direction. In addition, a plurality of notches 7 (an example of the recesses E) are provided at the lower end of the cylindrical portion 1 at intervals in the circumferential direction.

  The shaft portion 2 is formed on the outer peripheral surface 10 of the vertical shaft portion whose outer diameter is continuous with the inner peripheral surface 4 of the cylindrical portion 1 following the base shaft portion 8 whose outer diameter is the same as the outer diameter of the steel pipe columnar body. A protrusion 11 that is formed by the fitting insertion portion 9 and that fits with the circumferential groove 5 of the cylindrical portion 1 is provided at the tip end portion 2S of the shaft portion. An outer groove portion 12 is provided around the shaft portion outer peripheral surface 10 of the outer periphery of the insertion portion 9 at a position corresponding to the inner groove portion 6 of the cylindrical portion 1. In addition, a joint recess 13 that joins the tube tip 1S of the tube portion 1 is provided around the upper portion of the base shaft portion 8 and is spaced apart from the notch 7 of the tube portion 1 in the circumferential direction. At the corresponding position, a notch recess 14 (an example of the recess E) having the same thickness as the notch 7 and having a required depth is provided, and a plurality of screw holes 15 are formed in the back wall portion of each notch recess 14. Is provided.

  A plurality of screw holes 16 provided at intervals in the circumferential direction from the outer periphery of the cylindrical portion 1 are communicated with each inner groove portion 6, and the screw holes 16 are provided in the inner groove portion 6. An arc key 18 (an example of a key member) that advances and retreats from the inside groove portion 6 to the position straddling the inside groove groove 6 and the inside groove groove 6 by the operation of the set bolt 17 screwed to Contained. The arc key 18 is advanced and retracted by a set bolt 17 as shown in FIG. The set bolt 17 has a right-handed screw head portion 17a screwed with the screw hole 16 at the base end portion, and a tail portion 17b screwed with a left-hand screw (reverse screw) provided on the arc key 18 at the distal end portion. When the set bolt 17 is rotated forward (right) and screwed, the arc key 18 moves forward, and when rotated backward (left), the arc key 18 moves backward. The structure for moving the arc key 18 back and forth is not limited to this.

  Reference numeral 20 denotes a rotation suppression key (an example of a fitting key member H) for preventing relative rotation between the cylindrical portion 1 of the upper columnar body A1 and the shaft portion 2 of the lower columnar body A2. A bolt insertion hole 21 is provided at a position corresponding to the screw hole 15 provided in the notch recess 14 while being formed to fit over the portion 7 and the notch recess 14 of the shaft portion 2.

In order to longitudinally connect the upper columnar body A1 and the lower columnar body A2, the upper columnar body A1 is lifted by a crane, carried directly above the lower columnar body A2, suspended, and the shaft portion 2 is inserted into the cylindrical portion 1. If this is done, the circumferential groove 5 of the cylindrical portion 1 and the protrusion 11 at the tip of the shaft portion 2 are joined, and the upper columnar body A1 and the lower columnar body A2 are fitted. And the notch part 7 of the cylinder part 1 is made to correspond with the notch recessed part 14 of the axial part 2 by rotation adjustment of upper columnar body A1.

  Thereafter, the rotation suppression key 20 is fitted over the notch 7 and the notch recess 14, and the mounting bolt 22 is screwed into the screw hole 15 and fixed (an example of the rotation prevention mechanism M). Thus, the upper and lower columnar bodies A1 and A2 are coupled so as not to rotate. Subsequently, the set bolt 17 is screwed and the arc key 18 stored in the inner groove portion 6 is pushed toward the outer groove portion 12 (an example of the connection mechanism S). As a result, the arc key 18 is engaged across both the groove portions 6 and 12 as shown by the chain line in FIG. 5, and both columnar bodies A1 and A2 are inserted and removed in the direction of the axis X through the arc key 18. Will be combined impossible.

  In the coupling through the arc key 18, the tensile force is transmitted from the one cylindrical portion 1 or the shaft portion 2 to the arc key 18 by the side pressure stress on the side surfaces of both the groove portions 6 and 12 and the arc key 18, and the arc force is applied as the shearing force. It is transmitted to the opposite side of the key 18. Then, it is transmitted again to the other cylindrical portion 1 or the shaft portion 2 by the side pressure stress on the side surfaces of the inner and outer groove portions 6 and 12 and the arc key 18. Further, the compressive force is transmitted by the compressive stress on the surface perpendicular to the tube axis of the tube portion 1 and the shaft portion 2.

Next, a second embodiment will be described. The columnar body of this embodiment is different from the previous columnar body in the shape of the cylindrical portion 1 cylindrical portion inner peripheral surface 4 and the shaft portion outer peripheral surface 10 of the shaft portion 2. 4 is formed in a conical surface 4a which is widened, and an inner peripheral surface 10 of the shaft portion 2 is formed in a tapered conical surface 10a which coincides with the conical surface 4a. A plurality of inner groove portions 6 and outer groove portions 12 are provided around the conical surfaces 4a and 10a with a space therebetween in the vertical direction.
With the above configuration, the columnar bodies adjacent to each other in the axis X direction of the columnar body do not require a laborious work of gradually bringing the columnar bodies A1 and A2 close to each other while rotating relative to each other like a screw fitting. When the shaft portion 2 is inserted into the cylindrical portion 1 of A1 and A2, the conical surfaces 4a and 10a are brought into contact with each other even if the axial position of the cylindrical portion 1 and the axial position of the shaft portion 2 are misaligned. The cylindrical portion 1 and the shaft portion 2 can be guided so as to be fitted concentrically by simply moving them close to each other in the columnar axis X direction.
In addition, about the other structure and the point of construction, since it is the same as that of the previous columnar body, the description is abbreviate | omitted.

Next, a third embodiment will be described. In the columnar body of this embodiment, the shape of the cylindrical inner peripheral surface 4 of the cylindrical portion 1 is formed in the cylindrical inner peripheral surface 4b where the cylindrical portion inner peripheral surface 4b gradually expands stepwise, and the shaft portion outer peripheral surface 10 of the shaft portion 2 with respect to this is formed. The shape is formed on the outer peripheral surface 10b of the shaft portion, which is tapered stepwise, matching the cylindrical inner peripheral surface 4b. The cylindrical inner peripheral surface 4b and the shaft outer peripheral surface 10b are provided with an inner groove portion 6 and an outer groove portion 12 on the vertical surfaces thereof.
With the above configuration, the cylindrical portion 1 and the shaft portion 2 can be fitted with each other by simply moving them close to each other in the columnar axis X direction. At that time, the cylindrical inner peripheral surface portion 4b and the shaft outer peripheral surface portion 10b Since the steps are formed in a stepped shape that matches each other, the fitting operation until the corresponding cylindrical portion inner peripheral surface portion 4b and the shaft portion outer peripheral surface portion 10b come into contact with each other can be performed without resistance, so that the fitting becomes easy.
Other structures and construction procedures are the same as those in the first and second embodiments, and the description thereof is omitted.

Next, a fourth embodiment shown in FIGS. 8A and 8B will be described. It differs from the previous columnar body in that an O-ring 25 is provided, and the cylindrical portion outer peripheral surface of the cylindrical portion 1 having the same diameter as the outer diameter of the steel pipe columnar bodies A1 and A2 is provided in the circumferential direction. A plurality of cutout portions 7 (an example of the recesses E) are formed by notching a part of the outer peripheral surface of the cylindrical portion at intervals, and the stepped portion 1D formed on the proximal end side of the cylindrical portion on the cylindrical inner peripheral surface 4 A groove 5 is provided.
The shaft portion 2 is formed on the outer peripheral surface 10 of the vertical shaft portion that is engaged with the inner peripheral surface 4 of the cylindrical portion 1 following the base shaft portion 8 whose outer diameter is the same as the outer diameter of the steel pipe columnar body. A protrusion 11 that is formed by the fitting portion 9 and that fits with the circumferential groove 5 of the cylindrical portion 1 is provided at the shaft tip portion 2S. At the upper part of the base shaft portion 8, a joint recess 13 that joins the tube portion tip portion 1 </ b> S of the tube portion 1 is provided around. The joint recess 13 is provided with an O-ring 25, and when the tube portion 1 and the shaft portion 2 are fitted, the inward groove portion 6 and the outward groove portion 12 are opposed without being obstructed by the O-ring 25. The O-ring 25 is allowed to be elastically deformed between the tube tip portion 1S and the joint recess 13 so that the position can be adjusted and the engagement operation for engaging the arc key 18 is performed reliably. A space of a size that can surely seal is formed. In addition, the outer peripheral surface of the base shaft portion 8 has a notch having a required depth in the vertical direction with the same thickness as the notch portion 7 at a position corresponding to the notch portion 7 of the cylindrical portion 1 with an interval in the circumferential direction. A recess 14 is provided, and a rotation inhibiting key 20 (an example of a fitting key member H) is fitted over the notch 7 and the notch recess 14, and the mounting bolt 22 is screwed into the screw hole 15 and fixed.
With the above configuration, relative rotation of the columnar bodies A1 and A2 around the axis X can be prevented, the contact surface between the cylindrical inner peripheral surface 4 and the shaft outer peripheral surface 10, and the inward groove portion 6 and the outer It becomes easy to prevent water from entering the direction groove portion 12 and the arc key 18.
In addition, about the other structure and the point of construction, since it is the same as that of the thing in the previous columnar body, the description is abbreviate | omitted.
Further, the O-ring 25 may not be provided unless particularly necessary.

Next, a fifth embodiment shown in FIGS. 9A and 9B will be described. The columnar body of this embodiment is different from the previous columnar body in the shape of the anti-rotation mechanism M, and the outer peripheral surface of the cylindrical portion of the cylindrical portion 1 having the same diameter as the outer diameter of the steel pipe columnar bodies A1 and A2. 1G includes a plurality of cutout recesses 23 (of the recesses E) that are notched in the circumferential direction and part of the outer peripheral surface 1G of the cylinder part is cut away and opened toward the shaft part 2 side of the columnar body connection part B that is opposed. An example) is formed, and a circumferential groove 5 is provided in the stepped portion 1D formed on the tube portion base end side on the tube portion inner peripheral surface 4. The shaft portion 2 is formed on the outer peripheral surface 10 of the vertical shaft portion that is engaged with the inner peripheral surface 4 of the cylindrical portion 1 following the base shaft portion 8 whose outer diameter is the same as the outer diameter of the steel pipe columnar body. A protrusion 11 that is formed by the fitting portion 9 and that fits with the circumferential groove 5 of the cylindrical portion 1 is provided at the shaft tip portion 2S. In addition, a joint concave portion 13 that joins the cylindrical tip end portion 1S of the cylindrical portion 1 is provided around the upper portion of the base shaft portion 8, and in the circumferential direction of the end surface portion 1T facing the cylindrical portion 1 in the basic shaft portion 8. An engagement protrusion 24 (an example of a fitting key member H) is formed at a position corresponding to the notch recess 23 formed in the cylindrical portion 1 with an interval therebetween. .
Then, when fitting the shaft portion 2 to the cylindrical portion 1, if the fitting operation is performed while the engagement protrusion 24 is positioned at a position facing the notch recess 23, the protrusion 11 provided on the shaft tip portion 2 </ b> S. Is fitted into the circumferential groove 5, and the cylindrical tip 1 </ b> S is fitted into the joint recess 13, and at the same time, the engagement protrusion 24 is fitted and engaged with the notch recess 23.
With the above configuration, the columnar bodies A1 and A2 can be operated while being able to visually confirm the engagement state of the engagement protrusions 24 that are fitted into the notch recesses 23, and only by the fitting operation by the close movement of the columnar bodies A1 and A2. Relative rotation around the axis X can be prevented.
In addition, about the other structure and the point of construction, since it is the same as that of the thing in the previous columnar body, the description is abbreviate | omitted.

Next, a sixth embodiment shown in FIGS. 10A and 10B will be described. The columnar body of this embodiment is different from the previous columnar body in the shape of the rotation prevention mechanism M. The cylindrical portion 1 is provided with a ridge 11 around the distal end portion 1S of the cylindrical portion, and the ridge. 11 is formed with a plurality of engaging protrusions 26 (an example of a fitting key member H) projecting toward the shaft portion 2 side of the opposing columnar body connecting portion B with an interval in the circumferential direction. A circumferential groove 5 is provided in a step portion 1D formed on the base end side of the cylindrical portion on the peripheral surface 4.
The shaft portion 2 has a vertical shaft outer peripheral surface 10 whose outer diameter is engaged with the cylindrical inner peripheral surface 4 of the cylindrical portion 1 following the base shaft portion 8 whose outer diameter is the same as the outer diameter of the steel pipe columnar bodies A1 and A2. And a protrusion 11 that fits with the circumferential groove 5 of the cylindrical portion 1 is provided at the shaft tip 2S. In addition, a joint concave portion 13 that joins the cylindrical tip end portion 1S of the cylindrical portion 1 is provided around the upper portion of the base shaft portion 8, and in the circumferential direction of the end surface portion 2T that faces the cylindrical portion 1 in the basic shaft portion 8. A mortise 27 (an example of the recess E) is formed at a position corresponding to the engagement protrusion 26 formed on the cylindrical portion 1 with a space therebetween.
When the shaft portion 2 is fitted to the tube portion 1 and the fitting operation is performed while the mortise 27 is located at a position facing the engagement protrusion 26, the protrusion 11 provided at the tube portion distal end portion 1S. Is fitted into the circumferential groove 5, and the tip portion 1 </ b> S of the cylinder portion is fitted into the joint recess 13, and at the same time, the engaging protrusion 26 is fitted and engaged in the mortise 27.

With the above configuration, for example, a joining line formed on the outer peripheral surface as compared with a configuration in which a fitting convex portion and a fitting concave portion are formed on the outer peripheral surface of the cylindrical portion 1 and the shaft portion 2 to prevent rotation. Therefore, it is possible to easily prevent the intrusion of water and to prevent relative rotation of the columnar bodies A1 and A2 around the axis X only by the fitting operation by the close movement of the columnar bodies A1 and A2. it can.
As shown in FIG. 11, the engagement protrusion 26 is formed integrally with the protrusion 11 as in the above embodiment, and the engagement protrusion 26 formed separately is attached with a bolt 28 or the like as shown in FIG. It may be.
In this case, when the engaging protrusion 26 is fitted and engaged with the mortise 27, even if the engaging protrusion 26 is damaged and cannot be used due to the contact, the engaging protrusion 26 at that position is replaced with a new one. Can be replaced.
In addition, about the other structure and the point of construction, since it is the same as that of the previous columnar body, the description is abbreviate | omitted.

Next, a seventh embodiment shown in FIGS. 12A and 12B will be described. The columnar body of this embodiment is different from the previous columnar body in the shape of the anti-rotation mechanism M. The cylindrical portion 1 is provided with a ridge 11 around the distal end portion 1S of the cylindrical portion, A circumferential groove 5 is provided in the stepped portion 1D formed on the cylindrical base end side of the peripheral surface 4, and an opening is provided toward the distal end side of the cylindrical portion with an interval in the circumferential direction of the inner peripheral surface on the cylindrical base end side. A plurality of mounting recesses 29 are formed, and an engagement plate member 30 (fitting) is formed in the mounting recess 29 from the stepped portion 1D formed on the base end side of the cylinder portion toward the shaft portion 2 side of the columnar body connecting portion B facing each other. An example of the key member H is attached so as to protrude.
The shaft portion 2 has a vertical shaft outer peripheral surface 10 whose outer diameter is engaged with the cylindrical inner peripheral surface 4 of the cylindrical portion 1 following the base shaft portion 8 whose outer diameter is the same as the outer diameter of the steel pipe columnar bodies A1 and A2. A joint recess 13 is formed on the upper portion of the base shaft portion 8 to be joined to the protrusion 11 of the tube tip end portion 1S of the tube portion 1. The notch recess 31 (the recess E of the recess E) having a shape in which the engagement plate member 30 is fitted and engaged at a position facing the engagement plate member 30 attached to the cylindrical portion 1 with a gap in the circumferential direction of the end surface portion 2T facing the portion 1. An example) is formed.
When the shaft portion 2 is fitted to the tube portion 1 and the fitting operation is performed while the notch recess 31 is positioned at a position facing the engagement plate member 30, the protrusion 11 provided on the shaft tip portion 2S. Is fitted into the circumferential groove 5, and the protrusion 11 provided at the cylindrical tip 1 </ b> S is fitted into the joint recess 13. At the same time, the engagement plate member 30 is fitted and engaged in the notch recess 31.

With the above configuration, the fitting key member H can be formed simply by attaching the engaging plate member 30 formed separately. For example, as compared with the case where the fitting key member H is formed by a shaving operation. In addition, the forming operation for forming the fitting key member H in the cylindrical portion 1 is facilitated, and only the fitting operation by the close movement of the columnar bodies A1 and A2 is performed around the axis X of the columnar bodies A1 and A2. Relative rotation can be prevented.
In addition, about the other structure and the point of construction, since it is the same as that of the previous columnar body, the description is abbreviate | omitted.

Next, an eighth embodiment shown in FIGS. 13A and 13B will be described. The columnar body of this embodiment is different from the previous columnar body in the shape of the rotation prevention mechanism M. The cylindrical portion 1 has a stepped portion formed on the cylindrical base end side of the cylindrical inner peripheral surface 4. 1D is provided with a circumferential groove 5, and a fitting step 4c (recessed portion E) formed by a polygonal inner peripheral surface having an inner diameter between the inner diameter of the cylindrical inner peripheral surface 4 and the outer diameter of the cylindrical outer peripheral surface 1G. 1) is formed on the inner peripheral portion of the cylindrical tip end portion 1S so as to open to the shaft portion 2 side of the opposing columnar body connecting portion B, and the end surface facing the shaft portion 2 side of the fitting step portion 4c. A protrusion 11 is provided around the portion 1T.
The shaft portion 2 includes a base shaft portion 8 whose outer diameter is the same as the outer diameter of the steel tube columnar bodies A1 and A2, and a vertical shaft outer peripheral surface 10 whose outer periphery is engaged with the cylindrical inner peripheral surface 4 of the cylindrical portion 1. The formed fitting insertion part 9 and fitting shaft part 2J
(An example of the fitting key member H). The fitting shaft portion 2J is formed on the upper portion of the base shaft portion 8 in a shape having an outer peripheral shape that fits and engages with a fitting step portion 4c formed on the inner peripheral portion of the cylindrical portion tip portion 1S of the cylindrical portion 1. Has been.
When the fitting operation for fitting the shaft portion 2 to the tube portion 1 is performed, the protrusion 11 formed at the shaft portion distal end portion 2S is fitted into the circumferential groove 5 formed at the tube portion base end side, and the shaft The protrusion 11 of the end surface portion 1T of the tube portion is fitted in the joint recess 13 of the end surface portion 2T facing the tube portion 1 side of the portion 2, and at the same time, the fitting shaft portion 2J is fitted and engaged in the fitting step portion 4c. The

With the above configuration, the relative rotation around the axis X between the columnar bodies A1 and A2 can be prevented only by the fitting operation by the close movement of the columnar bodies A1 and A2.
Moreover, if the shape of the inner peripheral surface of the fitting step portion 4c and the shape of the outer peripheral surface of the fitting shaft portion 2J are made to be a point-symmetric polygonal shape, the position of the fitting shaft portion 2J facing the fitting step portion 4c Even if they are misaligned, they can be fitted and connected by rotating any of the columnar bodies while the fitting shaft portion 2J is in contact with the fitting step portion 4c.
Further, if the shape of the inner peripheral surface of the fitting step portion 4c and the shape of the outer peripheral surface of the fitting shaft portion 2J are asymmetrical polygonal shapes, they can be fitted only at fixed positions, so the columnar bodies A1, A2 This is convenient when you want to match each other.
In addition, about the other structure and the point of construction, since it is the same as that of the previous columnar body, the description is abbreviate | omitted.

Next, a ninth embodiment shown in FIGS. 14A and 14B will be described. The columnar body of this embodiment is different from the previous columnar body in the shape of the rotation prevention mechanism M, and the circumferential groove 5 is formed in the stepped portion 1D formed on the cylindrical base end side of the cylindrical inner peripheral surface 4. The cylindrical portion distal end 1S is formed in a stepped shape having an outer peripheral diameter smaller than the outer peripheral diameter on the cylindrical portion proximal end side, and the bolt insertion holes 32 are provided at a plurality of locations in the circumferential direction of the cylindrical portion distal end 1S. (An example of the recess E) is provided.
The shaft portion 2 has a vertical shaft outer peripheral surface 10 whose outer diameter is engaged with the cylindrical inner peripheral surface 4 of the cylindrical portion 1 following the base shaft portion 8 whose outer diameter is the same as the outer diameter of the steel pipe columnar bodies A1 and A2. And a protrusion 11 that fits with the circumferential groove 5 of the cylindrical portion 1 is provided at the shaft tip 2S.
In addition, a joint concave portion 13 that is joined to the cylindrical tip portion 1S of the cylindrical portion 1 is provided around the upper portion of the base shaft portion 8 and an inner peripheral surface of the shaft portion sandwiching the joint concave portion 13 from the outer peripheral surface of the base shaft portion 8. A plurality of bolt insertion holes 33 extending to are formed at positions corresponding to the bolt insertion holes 32 provided in the cylindrical portion distal end portion 1S.
When the shaft portion 2 is fitted to the tube portion 1, the bolt insertion shaft 32 of the bolt insertion hole 33 (an example of the recess E) formed in the base shaft portion 8 is used as the bolt insertion hole 32 provided in the tube portion distal end portion 1 </ b> S. When a fitting operation is performed in accordance with the core and a bolt 34 (an example of a fitting key member) is screwed from the insertion hole 32 toward the inner peripheral surface of the shaft part via the insertion hole 33, the bolt 34 (provided at the tip part 2S of the shaft part) is provided. The cylindrical protrusion 1 is fitted into the circumferential groove 5, and the cylindrical portion 1 and the shaft portion 2 can be fitted and connected in a state where the cylindrical portion distal end portion 1 </ b> S is fitted in the joint recess 13.

With the above configuration, the bolt 34 can prevent relative rotation of the columnar bodies A1 and A2 around the axis X, and also has a function of preventing the columnar bodies A1 and A2 from coming off. .
In addition, about the other structure and the point of construction, since it is the same as that of the thing in the previous columnar body, the description is abbreviate | omitted.

Next, a tenth embodiment shown in FIGS. 15A and 15B will be described. The columnar body of this embodiment is different from the previous columnar body in the shape of the rotation prevention mechanism M, and the columnar body axis perpendicular to the inward groove portion 6 is formed on the cylindrical inner peripheral surface 4 of the cylindrical portion 1. A plurality of cylindrical key grooves 35 extending in the X direction are provided, and a plurality of axial key grooves 36 extending in the X direction of the columnar body axis perpendicular to the outward groove 12 are provided on the shaft outer peripheral surface 2G of the shaft 2. A key plate 38 is fitted into one of the key grooves 35, 36 and is fastened with bolts 37 as necessary. At this time, the thickness of the key plate 38 in the radial direction of the columnar body connecting portion B is formed so as to protrude in the radial direction by the depth of the opposing key groove from the internally fitted key groove.
Then, when the shaft portion 2 is fitted to the cylinder portion 1, the fitting operation is performed while the other key groove 35 or 36 is positioned at a position facing the key plate 38 fitted in the key groove 35 or 36. As a result, the key plate 38 is inserted and engaged so as to straddle both the key grooves 35 and 36.
With the above configuration, the relative rotation in the axis X direction between the columnar bodies A1 and A2 can be prevented only by the fitting operation by the close movement of the columnar bodies A1 and A2. In addition, about the other structure and the point of construction, since it is the same as that of the previous columnar body, the description is abbreviate | omitted.

Next, an eleventh embodiment shown in FIGS. 16A and 16B will be described. The columnar body of this embodiment is different from the previous columnar body in the shapes of the connection mechanism S and the rotation prevention mechanism M, and the cylindrical portion 1 has the same outer diameter as the outer diameter of the steel pipe columnar body A1. The inner periphery is formed in the vertical inner peripheral surface 4 of the cylindrical portion to which the shaft portion 2 is fitted, and the bolt insertion hole 40 (the recess E of the recess E is penetrated through the outer peripheral surface 1G of the shaft portion). A plurality of examples) are formed in the circumferential direction. In addition, a projecting shape 11 is provided around the cylindrical tip portion 1S.
The shaft portion 2 is formed on a vertical shaft outer peripheral surface 10 whose outer diameter is in contact with the cylindrical inner peripheral surface 4 of the cylindrical portion 1 following the base shaft portion 8 whose outer diameter is the same as the outer diameter of the steel pipe columnar body A2. A bolt is formed at the position facing the bolt insertion hole 40 formed in the tube portion 1 when the fit portion 9 is fitted in the inner peripheral surface 4 of the tube portion. An insertion hole 41 (an example of the recess E) is formed. Further, the shaft tip 2S is provided with a ridge 11 that fits into the circumferential groove 5 of the tube 1 and is formed on the tube tip 1S of the tube 1 at the upper portion of the base shaft 8. A joint recess 13 for joining to the ridge 11 is provided around.
Then, when fitting the shaft portion 2 to the tube portion 1, a fitting operation in which the bolt insertion hole 40 provided in the tube portion 1 is matched with the bolt insertion shaft core of the bolt insertion hole 41 formed in the fitting insertion portion 9. The bolt 42
When (an example of the fitting key member H) is screwed and connected so as to straddle both the insertion holes 40 and 41, the protrusion 11 provided at the shaft tip 2S is fitted into the circumferential groove 5, and the tip of the tube The cylindrical portion 1 and the shaft portion 2 can be fitted and connected in a state where the protrusion 11 formed in the portion 1S is fitted in the joint recess 13.
With the above-described configuration, the bolt 42 can be tightened to prevent relative rotation of the columnar bodies A1 and A2 around the axis X (an example of the anti-rotation mechanism M) and the adjacent columnar bodies can be removed from each other. It is possible to connect to the stopped state (an example of the connection mechanism S).

[Another embodiment]
Other embodiments will be described below.
<1> The key member used for the columnar body connection mechanism is not limited to the arc key described in the previous embodiment. For example, a C-shaped elastic ring key is accommodated in the inward groove portion or the outward groove portion. Alternatively, it may be configured to be fitted in a state straddling the inward groove portion and the outward groove portion in accordance with the fitting operation between the cylindrical portion and the shaft portion.
In this case, the adjacent columnar bodies can be connected to each other in a retaining state only by the fitting operation of the shaft portion with respect to the cylindrical portion.
<2> Although the steel pipe columnar body has been described in the above embodiment, the application of the present invention is not limited to the steel pipe columnar body. For example, in addition to those using a steel pipe such as a steel pipe sheet pile, a concrete columnar body, a synthetic columnar body, etc. Thus, the columnar body formed using other materials can be applied if the columnar body connecting portion formed as in the configuration of the present invention can be provided.

1 Tube (connection)
1S tube end 2 shaft part (connecting part)
2T end face 2J fitting shaft 4c fitting step 8 base shaft 13 joint recess 33 fitting key member A1 columnar body A2 columnar body E recess portion fitting key member M detent mechanism X columnar body axis

Claims (9)

Each columnar body is provided with a connection portion for an adjacent columnar body, and the columnar body is configured such that the connection portions of the columnar bodies adjacent to each other in the axial direction of the columnar body are freely connectable,
One of the connecting portions provided at both ends of the columnar body is formed in a cylindrical portion, and the other is formed in a shaft portion that can be fitted into the cylindrical portion, so that adjacent connecting portions can be fitted together. ,
The shaft portion has a base shaft portion including an end surface portion facing the tube portion from the axial direction in a state where the tube portion and the shaft portion of adjacent columnar bodies are fitted to each other.
Provided with a detent mechanism that prevents relative rotation around the axis of the fitted columnar bodies,
The rotation prevention mechanism is provided on the inner side of the outer peripheral surface of the cylindrical portion and the base shaft portion ,
The rotation preventing mechanism is a recess that opens in one of the tube portion and the shaft portion and toward the one end side in the axial direction inside the outer peripheral surface of the tube portion and the base shaft portion. Form the
A columnar body in which a fitting key member that fits into the recess is provided on the other side only in accordance with an operation of fitting the cylindrical portion and the shaft portion of adjacent columnar bodies together from the axial direction . The shaft portion is formed in a cylindrical shaft shape,
The concave portion is provided on the inner peripheral surface side of either the cylindrical portion or the shaft portion so as to open across the end surface of the cylindrical portion or the shaft portion,
Columnar body according to claim 1, wherein is provided the mating key member to be fitted from the axial direction in the recess on the other of the inner peripheral surface side.   The concave portion is provided so as to open to either the inner peripheral surface side of the cylindrical portion or the outer peripheral surface side of the shaft portion over the end surface of the cylindrical portion or the shaft portion,
  2. The columnar body according to claim 1, wherein the fitting key member fitted into the concave portion from the axial direction is provided on the other side of the inner peripheral surface side of the cylindrical portion and the outer peripheral surface side of the shaft portion. The columnar body according to any one of claims 1 to 3 , wherein the fitting key member is constituted by a fitting key member separate from the cylindrical portion and the shaft portion. Each columnar body is provided with a connection portion for an adjacent columnar body, and the columnar body is configured such that the connection portions of the columnar bodies adjacent to each other in the axial direction of the columnar body are freely connectable,
One of the connecting portions provided at both ends of the columnar body is formed in a cylindrical portion, and the other is formed in a shaft portion that can be fitted into the cylindrical portion, so that adjacent connecting portions can be fitted together. ,
The shaft portion has a base shaft portion including an end surface portion facing the tube portion from the axial direction in a state where the tube portion and the shaft portion of adjacent columnar bodies are fitted to each other.
Provided with a detent mechanism that prevents relative rotation around the axis of the fitted columnar bodies,
The rotation prevention mechanism is provided on the inner side of the outer peripheral surface of the cylindrical portion and the base shaft portion,
The anti-rotation mechanism is formed by a fitting step portion formed by an inner peripheral surface of the cylindrical portion and an outer peripheral surface of the shaft portion, and is fitted into the fitting step portion so as not to be relatively rotatable. configured Thea Ru pillar-shaped body provided the focus shaft portion.   The columnar body according to claim 5, wherein an inner peripheral surface forming the fitting step portion and an outer peripheral surface forming the fitting shaft portion are formed in a polygonal shape when viewed in the axial direction.   The columnar body according to claim 6, wherein an inner peripheral surface forming the fitting step portion and an outer peripheral surface forming the fitting shaft portion are formed in a point-symmetric polygonal shape as viewed in the axial direction.   The columnar body according to claim 6, wherein an inner peripheral surface forming the fitting step portion and an outer peripheral surface forming the fitting shaft portion are formed in an asymmetric polygonal shape as viewed in the axial direction. Each columnar body is provided with a connection portion for an adjacent columnar body, and the columnar body is configured such that the connection portions of the columnar bodies adjacent to each other in the axial direction of the columnar body are freely connectable,
One of the connecting portions provided at both ends of the columnar body is formed in a cylindrical portion, and the other is formed in a shaft portion that can be fitted into the cylindrical portion, so that adjacent connecting portions can be fitted together. ,
The shaft portion has a base shaft portion including an end surface portion facing the tube portion from the axial direction in a state where the tube portion and the shaft portion of adjacent columnar bodies are fitted to each other.
The end surface portion is provided with a circumferential groove-like joining recess for fitting the annular cylindrical tip end portion in a state where the cylindrical portion and the shaft portion of adjacent columnar bodies are fitted to each other,
Provided with a detent mechanism that prevents relative rotation around the axis of the fitted columnar bodies,
The rotation preventing mechanism includes a recess capable of communicating in series between the base shaft portion and the tip end portion of the tube portion in a state where the cylindrical portion and the shaft portion of adjacent columnar bodies are fitted to each other, and the base shaft portion A columnar body that is configured to be provided with a fitting key member that is inserted from the outer peripheral side into the concave portion and whose distal end portion in the insertion direction is fixed to the base shaft portion.

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