JP2004211548A5 - - Google Patents

Description

Pillar

  The present invention can be widely applied to the submerging method of supporting piles, landslide piles, soil retaining column row piles, and the like, and the connection between the columnar bodies performed on the columns of the structure, particularly, the Nakabori method, the soil cement composite pile method, Regarding the connection between pillars suitable for connection of pillars in the method of laying down pillars by rotary press-fitting and other construction methods that give rotation to pillars during laying, such as rotary buried pile construction method, more specifically, both ends of pillars The present invention relates to a columnar body which is provided with a connecting portion so that the connecting portions of the columnar bodies adjacent in the axial direction of the columnar body can be connected to each other.

  In general, as a method of submerging a columnar body, a driving method in which a striking is applied, a pre-boring method that is inserted into an existing drilling hole, or a method of rotating and press-fitting a columnar body while excavating with an auger inserted in the columnar body. There are two types of construction methods: Going underground excavation, Soil cement composite pile method in which pillars are rotated and buried while creating soil cement, and Rotary buried pile method in which pillars are simply rotated and pressed (buried). Are often adopted.

  In addition, in the construction of the column, the fixed-length column is carried to the site for production, transportation, etc., and the upper column is hung by a crane against the lower column in the subsidence process, and welded. The construction is proceeded while being connected by the method described above, and a columnar body having a predetermined length is laid down, and a method by welding is employed for this connection.

Since the connection by this welding is on-site welding, it takes a lot of time for the work and requires a skilled welder, and not only does the quality of the welded part depend on the weather, but also the backing ring accompanying the welding It is troublesome to use metal fittings, etc., and requires a lot of cost. Therefore, as an alternative to the connection by welding, a method of connecting the upper columnar body and the lower columnar body with a screw joint has been proposed (for example, see Patent Documents 1 to 3).

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

  However, the connection method using a threaded joint is complicated and costly to manufacture. Moreover, since the connection of the pillars is performed by suspending the upper pillars on the lower pillars, it is extremely difficult to rotate the pillars for screwing while suspending them. Moreover, in the construction method in which the columnar body is sunk by rotary press-fitting, the columnar body may be reversely rotated at the time of construction, and in such a case, the screws are loosened, so that this connection method by screwing cannot be adopted.

The present invention has been made in order to solve such a problem. Instead of using a method of welding or screwing a columnar body, connection can be made firmly and simply without using a special machine or skill. In addition, mechanical means that can prevent relative rotation between the upper and lower pillars and can be connected so that they can rotate integrally, and can also be used for drilling method, soil cement composite pile method, rotary buried pile method, etc. It is intended to provide a connection mechanism of a columnar body according to the above.

As illustrated in FIGS. 1 to 8, 11, 12, and 15, a first characteristic configuration of the present invention includes connecting portions B to adjacent columnar bodies A1 and A2 at both ends of columnar bodies A1 and A2, respectively. And the connecting portions B of the columnar bodies A1, A2 adjacent to each other in the axis X direction of the columnar bodies A1, A2 are configured to be freely connectable to each other, and both ends of the columnar bodies A1, A2 One of the two connecting portions B provided on the cylindrical portion 1 is formed on the shaft portion 2 and the other is formed on the shaft portion 2 which can be fitted inside the cylindrical portion 1, so that adjacent connecting portions B are formed so as to be fittable with each other, The connection mechanism S, which allows the adjacent columnar bodies A1, A2 to be connected to each other in a state that prevents them from coming off, and the detent mechanism M, which prevents relative rotation of the connected columnar bodies A1, A2 around the axis X, are connected by the connection. provided in part B, the cylinder inner peripheral surface 4 of the cylindrical portion 1 and the shaft portion outer circumferential surface 10 of the shaft portion 2 Opposite the connection mechanism S to the opposing site provided that, the cylinder of the connecting mechanism to the S and the cylindrical portion 1 and the shank 2 provided with a fitting key member H of separate, columnar adjacent bodies A1, A2 part 1 and the said shaft portion 2 in a state of being fitted and connected to each other, there is to you have configured the detent mechanism M for preventing relative rotation in the axis X around and if the columnar body A1, A2 which connect .

[Action and effect]
According to the first characteristic configuration of the present invention, one of the two 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 which can be fitted in the cylindrical portion, and is adjacent to the cylindrical portion. A connection mechanism formed so that the connection portions can be fitted together, a connection mechanism capable of connecting adjacent columnar bodies to each other in a retaining state, and a detent mechanism for preventing relative rotation of the connected columnar bodies around the axis. Since the connection mechanism is provided at the opposed portion where the inner peripheral surface of the cylindrical portion of the cylindrical portion and the outer peripheral surface of the shaft portion of the shaft portion are provided in the connection portion, the connection is performed in a state where the relative rotation of adjacent columnar bodies is prevented. It became possible to do.
In other words, in the construction method in which the opposing columnar bodies are connected by the connection mechanism and the columnar bodies are sunk by rotational press-fitting, even if the columnar bodies are reversely rotated, the rotation preventing mechanism prevents the relative rotation of the columnar bodies. Can be done .
In addition to the Re their, the connecting mechanism and the cylindrical portion and the shaft portion provided with a fitting key a separate member, while fitting the cylindrical portion of the columnar body adjacent the shaft portion connected together and connected Since the rotation preventing mechanism is configured to prevent the relative rotation of the pillars around the axis, it is possible to prevent the relative rotation of the connected pillars around the axis by a simple operation.
In other words, for example, if the configuration is such that the ends of adjacent columnar bodies are welded and connected to each other to prevent their relative rotation, the welding operation takes a lot of time and the quality of the welded part depends on the weather. In addition, a skilled welder is required, but in the case of this case, when the cylindrical portion and the shaft portion are fitted and connected, the fitting key member uses the fitting key member to rotate around the axis of the adjacent columnar bodies. Can be prevented from rotating relative to each other.
As a result, became a jar by Ru can be used Nakahori method to go to rotate press-fitting the columnar body while drilling in the inserted auger to the columnar body, soil cement synthetic pile construction method, also in rotation buried pile method and the like.

As illustrated in FIGS. 1, 3, 4, 6 to 8, 11, and 12, a second characteristic configuration of the present invention is any one of the cylindrical portion 1 and the shaft portion 2 or Any one of the cylindrical portion 1 and the shaft portion 2 is formed in a state where the concave portions E are formed on both sides and the cylindrical portion 1 and the shaft portion 2 of the adjacent columnar bodies A1 and A2 are fitted and connected to each other. The fitting key member H is fitted into one of the concave portions E, and the fitting key member H is fixed to the other, so that relative rotation of the connected columnar bodies A1 and A2 around the axis X is prevented. This is where the detent mechanism M is configured .

According to the second characteristic configuration of the present invention , a concave portion is formed in one or both of the tubular portion and the shaft portion, and the tubular portion and the shaft portion of the adjacent columnar body are fitted and connected to each other. The fitting key member is fitted into one of the concave portions of the cylindrical portion and the shaft portion, and the fitting key member is fixed to the other, thereby preventing relative rotation of the connected columnar bodies around the axis. Since the rotation preventing mechanism is configured, a cylinder recess and a shaft recess are respectively formed at positions opposing the cylinder and the shaft, and the fitting key is provided so as to straddle the cylinder recess and the shaft recess. In the case of adopting a configuration in which the members are fitted, when fitting and connecting the cylindrical portion and the shaft portion, the fitting is performed so that the two recesses are located at positions facing each other, and the fitting is performed so as to straddle the two recesses. The relative rotation of the adjacent columnar bodies around the axis by the simple work of fitting and fixing the key members It is possible to prevent.
Further, when a concave portion is formed in one of the cylindrical portion and the shaft portion, and a fitting key member that fits in the concave portion is fixed in the other portion, the cylindrical portion and the shaft portion are fitted and connected to each other. In the case where the fitting key member is fitted into the concave portion, the cylindrical portion and the shaft portion are moved in a state where the columnar bodies are moved in the axial direction and the facing position of the fitting key member is aligned with the concave portion. The relative rotation of the adjacent columnar bodies around the axis can be prevented only by performing the fitting operation of fitting the two.
As a result, even a non-skilled person can easily set the rotation preventing mechanism necessary for preventing the relative rotation of the columnar bodies, so that the workability can be improved.

  Note that, as described above, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 show a first embodiment of a columnar body according to the present invention, FIG. 6 shows a second embodiment thereof, FIG. 7 shows a third embodiment thereof, 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, a first embodiment will be described. In FIG. 1 to FIG. 5, A1 is a steel pipe columnar body serving as an upper columnar body, and A2 is a steel pipe columnar body serving as a lower columnar body. A female cylindrical portion 1 (an example of a columnar connecting portion) is provided on the upper columnar body A1 at the lower end joined to the lower columnar body A2 so as to protrude downward by welding 3. At the upper end connected to the upper columnar body A1, a shaft portion 2 (an example of a columnar body connection portion) that protrudes into and fits with the cylindrical portion 1 is provided so as to protrude upward by welding 3.

  The tubular portion 1 has a tubular 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 inner periphery thereof is fitted with a shaft portion 2 described later. A circumferential groove 5 is formed in a step portion 1 </ b> D formed on the vertical inner peripheral surface 4 of the cylindrical portion and formed on the proximal end side of the cylindrical portion 1 on the inner peripheral surface 4 of the cylindrical portion. A plurality of inner grooves 6 are provided on the inner peripheral surface 4 of the cylindrical portion at intervals in the vertical direction. In addition, a plurality of notches 7 (an example of the concave portion 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 a vertical shaft outer peripheral surface 10 having an outer diameter that is continuous with a base shaft portion 8 having the same outer diameter as the outer diameter of the steel pipe columnar body, the outer periphery of which is engaged with the cylindrical inner peripheral surface 4 of the cylindrical portion 1. A projection 11 which is formed by the fitted insertion portion 9 and is fitted to the circumferential groove 5 of the cylindrical portion 1 is provided at the shaft tip 2S. An outer groove 12 is provided at a position corresponding to the inner groove 6 of the cylindrical portion 1 on the outer peripheral surface 10 of the shaft on the outer periphery of the fitting portion 9. In addition, a joining recess 13 that joins with the tip portion 1S of the tubular portion 1 of the tubular portion 1 is provided in the upper portion of the base shaft portion 8, and the cutout portion 7 of the tubular portion 1 is spaced apart in the circumferential direction. At a corresponding position, a notch recess 14 (an example of a recess E) having the same thickness as the notch 7 and having a required depth up and down is provided, and a plurality of screw holes 15 are provided in a back wall portion of each notch recess 14. Is provided.

  A plurality of screw holes 16 are provided in each of the inner groove portions 6 from the outer periphery of the cylindrical portion 1 at intervals in the circumferential direction, and a screw hole 16 is provided in the inner groove portion 6. An arc key 18 (an example of a key member) that advances and retreats from the inside of the inner groove portion 6 to a position straddling the inside of the outer groove portion 12 and the inside groove groove 6 by the operation of the set bolt 17 screwed into Is contained. The structure for moving the arc key 18 forward and backward is performed by, for example, a set bolt 17 as shown in FIG. The set bolt 17 has a right-hand screw head 17a screwed into the screw hole 16 at the base end thereof, and a tail 17b screwed with a left-hand screw (reverse screw) provided on the arc key 18 at the front end. When the set bolt 17 is turned forward (right) and screwed in, the arc key 18 moves forward, and when the set bolt 17 is turned counterclockwise (left), the arc key 18 moves backward. The structure for moving the arc key 18 forward and backward is not limited to this.

  Reference numeral 20 denotes a rotation inhibiting 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 formed at a position corresponding to the screw hole 15 provided in the notch recess 14 while being formed into a shape that fits over the portion 7 and the notch recess 14 of the shaft portion 2.

In order to vertically join the upper columnar body A1 and the lower columnar body A2, the upper columnar body A1 is lifted by a crane, transported just above the lower columnar body A2, lowered, and the shaft portion 2 is inserted into the cylindrical portion 1. Then, the circumferential groove 5 of the cylindrical portion 1 and the protrusion 11 at the tip of the shaft portion of the shaft portion 2 are joined, and the upper columnar body A1 and the lower columnar body A2 are fitted. Then, by adjusting the rotation of the upper columnar body A <b> 1, the notch 7 of the cylindrical portion 1 matches the notch recess 14 of the shaft portion 2.

  Thereafter, the rotation prevention key 20 is fitted over the notch 7 and the notch 14, and the mounting bolt 22 is screwed into the screw hole 15 and fixed (an example of the rotation preventing mechanism M). As a result, the upper and lower pillars A1 and A2 are non-rotatably connected. Subsequently, the set bolt 17 is advanced, and the arc key 18 housed in the inner groove 6 is pushed in toward the outer groove 12 (an example of the connection mechanism S). As a result, the arc key 18 is engaged across the grooves 6 and 12 as shown by the chain line in FIG. 5, and the two columnar bodies A1 and A2 are pulled out and inserted in the axis X direction via the arc key 18. Will be impossiblely combined.

  In the connection via the arc key 18, the tensile force is transmitted to the arc key 18 from one of the cylindrical portions 1 or the shaft portion 2 by the lateral pressure stress on both the groove portions 6, 12 and the side surface of the arc key 18, and the arc is generated as a shear force. It is transmitted to the opposite side of the key 18. Then, the pressure is transmitted to the other cylindrical portion 1 or the shaft portion 2 again by the side pressure stress of the inner and outer grooves 6, 12 and the side surface of the arc key 18. The compressive force is transmitted by a compressive stress on a plane perpendicular to the tube axis of the cylindrical 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 inner peripheral surface 4 and the shape of the shaft outer peripheral surface 10 of the shaft portion 2. 4 is formed on a converging conical surface 4a, and the shaft inner peripheral surface 10 of the shaft portion 2 is formed on a tapered conical surface 10a that matches the conical surface 4a. A plurality of inner grooves 6 and outer grooves 12 are provided on the conical surfaces 4a and 10a at intervals vertically.
According to the above configuration, unlike the screw-fitted type, there is no need for a troublesome work of gradually bringing the columnar bodies A1 and A2 close to each other while rotating them relative to each other, and the columnar bodies adjacent in the columnar axis X direction are not required. When the shaft portion 2 was inserted into the cylindrical portion 1 of A1 or A2, the conical surfaces 4a and 10a were brought into contact with each other even if the axial center position of the cylindrical portion 1 was misaligned with the axial center position of the shaft portion 2. It is possible to guide the cylindrical portion 1 and the shaft portion 2 so that they are fitted concentrically by simply moving the columnar body in the direction of the axis X in the X direction.
In addition, other structures and the points of construction are the same as those of the above-mentioned columnar body, and the description thereof will be omitted.

Next, a third embodiment will be described. In the columnar body of this embodiment, the shape of the cylindrical inner circumferential surface 4 of the cylindrical portion 1 is formed on the cylindrical inner circumferential surface 4b that gradually widens in a stepwise manner. The shape is formed on the shaft portion outer peripheral surface 10b that conforms to the cylindrical portion inner peripheral surface 4b and that gradually tapers. On the inner peripheral surface 4b and the outer peripheral surface 10b of the shaft portion, an inner groove portion 6 and an outer groove portion 12 are provided on a vertical surface thereof.
According to the above configuration, the cylinder portion 1 and the shaft portion 2 can be fitted by an operation of merely moving the columnar body in the X axis direction, and in this case, the cylindrical portion inner peripheral surface portion 4b and the shaft portion outer peripheral surface portion 10b Since the shapes are formed in a stepped shape that matches with each other, the fitting operation until the corresponding cylindrical inner peripheral surface portion 4b and the shaft outer peripheral surface portion 10b come into contact with each other can be performed without resistance, so that the fitting becomes easy.
The rest of the structure and the points of construction are the same as in the first and second embodiments, and therefore description thereof is omitted.

Next, a fourth embodiment shown in FIGS. 8A and 8B will be described. The O-ring 25 is provided differently from the previous columnar body. The outer peripheral surface of the cylindrical section 1 of the cylindrical section 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 notches 7 (an example of the concave portion E) are formed by cutting a part of the outer peripheral surface of the cylindrical portion at intervals, and a step 1D formed on the inner peripheral surface 4 of the cylindrical portion at the base end side of the cylindrical portion has a peripheral portion. A groove 5 is provided.
The shaft portion 2 is formed on a vertical shaft portion outer peripheral surface 10 that has an outer diameter that follows the base shaft portion 8 having the same outer diameter as the outer diameter of the steel pipe columnar body and that is engaged with the cylindrical inner surface 4 of the cylindrical portion 1. A projection 11 that is formed by the fitting portion 9 and that fits into the circumferential groove 5 of the cylindrical portion 1 is provided at the shaft tip portion 2S. Above the base shaft portion 8, a joint concave portion 13 that joins with the cylindrical portion distal end portion 1 </ b> S of the cylindrical portion 1 is provided. An O-ring 25 is provided in the joint recess 13, and when the cylindrical portion 1 and the shaft portion 2 are fitted to each other, the inward groove 6 and the outward groove 12 face each other without being hindered by the O-ring 25. The O-ring 25 is elastically deformed between the cylindrical tip 1S and the joint recess 13 so that the O-ring 25 can be aligned and the engagement operation for engaging the arc key 18 is reliably performed. A space having a size large enough to securely seal is formed. A notch having the same thickness as the notch 7 and a required depth up and down at a position corresponding to the notch 7 of the cylindrical portion 1 is provided on the outer peripheral surface of the base shaft portion 8 at intervals 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 cutout 7 and the cutout recess 14, and a 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, and the contact surface between the cylindrical inner peripheral surface 4 and the shaft outer peripheral surface 10, and the inward groove 6 and the outer surface. It is easy to prevent water from entering the direction groove 12 and the arc key 18.
In addition, since other structures and the points of construction are the same as those of the columnar body, the description thereof is omitted.
The O-ring 25 may not be provided unless it is particularly necessary.

Next, a fifth embodiment shown in FIGS. 9A and 9B will be described. The columnar body of this embodiment differs from the previous columnar body in the shape of the detent mechanism M, and has the same outer diameter as the outer diameter of the steel pipe columnar bodies A1, A2. 1G, a plurality of cutout recesses 23 (of recesses E) are formed by notching a part of the outer peripheral surface 1G of the cylindrical portion at intervals in the circumferential direction and opening toward the shaft portion 2 side of the opposing columnar body connection portion B. A peripheral groove 5 is provided in a step portion 1D formed on the inner peripheral surface 4 of the cylindrical portion on the base end side of the cylindrical portion. The shaft portion 2 is formed on a vertical shaft portion outer peripheral surface 10 that has an outer diameter that follows the base shaft portion 8 having the same outer diameter as the outer diameter of the steel pipe columnar body and that is engaged with the cylindrical inner surface 4 of the cylindrical portion 1. A projection 11 that is formed by the fitting portion 9 and that fits into 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 with the tip portion 1S of the tubular portion 1 of the tubular portion 1 is provided in the upper portion of the base shaft portion 8 and the circumferential direction of the end surface portion 1T of the base shaft portion 8 facing the tubular portion 1 is provided. 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 at an interval and fitted and engaged with the notch recess 23. .
When fitting the shaft portion 2 to the cylindrical portion 1 and performing the fitting operation while positioning the engaging protrusion 24 at a position facing the notch recess 23, the protrusion 11 provided on the shaft tip portion 2S is provided. Are fitted in the circumferential groove 5, the tip portion 1 </ b> S of the tubular portion is fitted in the joint recess 13, and the engagement protrusion 24 is fitted in the notch recess 23 at the same time.
According to the above configuration, it is possible to operate while visually confirming the fitted state of the engagement protrusion 24 fitted to the notch recess 23, and to perform the fitting operation only by the close movement of the columnar bodies A1 and A2 to perform the columnar bodies A1 and A2. It is possible to prevent relative rotation between the axes X.
In addition, since other structures and the points of construction are the same as those of the columnar body, the description thereof is omitted.

Next, a sixth embodiment shown in FIGS. The columnar body of this embodiment is different from the previous columnar body in the shape of the rotation preventing mechanism M. The cylindrical portion 1 is provided with a ridge 11 around the distal end portion 1S of the cylindrical portion. 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 are formed at intervals in the circumferential direction of the cylindrical member 11 and are formed inside the cylindrical portion. A peripheral groove 5 is provided in a step portion 1D formed on the peripheral surface 4 on the base end side of the cylindrical portion.
The shaft portion 2 has a vertical shaft outer peripheral surface 10 having an outer diameter which is continuous with a base shaft portion 8 having the same outer diameter as the outer diameters of the steel pipe columnar bodies A1 and A2, and whose outer periphery is in contact with the cylindrical inner peripheral surface 4 of the cylindrical portion 1. A projection 11 is formed on the shaft end portion 2 </ b> S to be fitted into the circumferential groove 5 of the cylindrical portion 1. In addition, a joint concave portion 13 that joins with the tip portion 1S of the tubular portion 1 of the tubular portion 1 is provided on the upper portion of the base shaft portion 8 and a circumferential direction of an end surface portion 2T of the base shaft portion 8 facing the tubular portion 1 is provided. A mortise 27 (an example of a concave portion E) is formed at a position corresponding to the engaging protrusion 26 formed on the cylindrical portion 1 at intervals.
When fitting the shaft portion 2 to the cylindrical portion 1 and performing the fitting operation while positioning the mortise hole 27 at a position facing the engaging projection 26, the protrusion 11 provided on the cylindrical portion distal end portion 1S is provided. Are fitted into the circumferential groove 5, the tip portion 1 </ b> S of the cylindrical portion is fitted into the joint recess 13, and the engaging protrusion 26 is fitted into the mortise 27 at the same time.
With the above configuration, for example, a joining line formed on the outer peripheral surface is 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 prevent water intrusion easily, and to prevent the 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.
The engaging projection 26 is formed integrally with the ridge 11 as in the above embodiment, and also has a configuration in which the separately formed engaging projection 26 is attached with a bolt 28 or the like as shown in FIG. It may be.
In this case, even when the engagement protrusion 26 that is damaged due to contact and becomes unusable occurs when the engagement protrusion 26 is fitted into the mortise hole 27, the engagement protrusion 26 at that location is replaced with a new one. Can be replaced.
Note that the other points of the structure and the construction are the same as those of the columnar body, and the description thereof will be omitted.

Next, a seventh embodiment shown in FIGS. The columnar body of this embodiment is different from the previous columnar body in the shape of the rotation preventing mechanism M. The cylindrical portion 1 is provided with a ridge 11 at the distal end portion 1S of the cylindrical portion. A circumferential groove 5 is provided in a step portion 1D formed on the cylindrical surface base end side of the circumferential surface 4 and is opened toward the cylindrical portion distal end side at an interval in the circumferential direction of the inner circumferential surface on the cylindrical portion base end side. A plurality of mounting recesses 29 are formed, and the engaging recesses 30 (fitting) are formed in the mounting recesses 29 from the stepped portion 1D formed on the base end side of the cylindrical portion toward the shaft portion 2 side of the opposing columnar body connection portion B. The key member H is mounted so as to protrude.
The shaft portion 2 has a vertical shaft outer peripheral surface 10 having an outer diameter which is continuous with a base shaft portion 8 having the same outer diameter as the outer diameters of the steel pipe columnar bodies A1 and A2, and whose outer periphery is in contact with the cylindrical inner peripheral surface 4 of the cylindrical portion 1. In the upper part of the base shaft part 8, a joint recess 13 is formed on the upper part of the base shaft part 8 to join with the ridge 11 of the tube part tip part 1 </ b> S. At a position facing the engaging plate 30 attached to the cylindrical portion 1 at a circumferential interval of the end surface portion 2T facing the portion 1, a notch concave portion 31 (of the concave portion E) having a shape in which the engaging plate 30 is fitted and engaged. Example) is formed.
When fitting the shaft portion 2 to the cylindrical portion 1 and performing the fitting operation while positioning the notch recess 31 at a position facing the engaging plate member 30, the protrusions 11 provided on the shaft portion distal end portion 2S are provided. Are fitted in the circumferential groove 5, and the ridges 11 provided on the distal end portion 1 </ b> S of the cylindrical portion are fitted in the joint recesses 13, and at the same time, the engaging plate members 30 are fitted into the cutout recesses 31.
According to the above configuration, the fitting key member H can be formed only by attaching the separately formed engaging plate member 30. Therefore, for example, compared with the case where the fitting key member H is formed by shaving work, the fitting key member H is formed. In addition, the forming operation for forming the fitting key member H in the cylindrical portion 1 is facilitated, and the fitting operation by the proximity movement of the columnar bodies A1 and A2 is performed only around the axis X of the columnar bodies A1 and A2. Relative rotation can be prevented.
The other structures and the points of the construction are the same as those of the columnar body, and the description is 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 preventing mechanism M. The cylindrical portion 1 has a stepped portion formed on the inner peripheral surface 4 of the cylindrical portion at the base end side of the cylindrical portion. A peripheral groove 5 is provided in 1D, and a fitting step 4c (recess E) formed by a polygonal inner peripheral surface having an inner diameter between the inner diameter of the inner peripheral surface 4 of the cylinder and the outer diameter of the outer peripheral surface 1G of the cylinder. Is formed on the inner peripheral portion of the cylindrical portion distal end portion 1S so as to open on the shaft portion 2 side of the opposing columnar body connection portion B, and the end face of the fitting step portion 4c facing the shaft portion 2 side. A ridge 11 is provided around the portion 1T.
The shaft portion 2 includes a base shaft portion 8 having an outer diameter equal to the outer diameter of the steel pipe columnar bodies A1 and A2, and a vertical shaft outer peripheral surface 10 having an outer periphery which is in contact with the inner peripheral surface 4 of the cylindrical portion 1 of the cylindrical portion 1. The formed fitting portion 9 and the fitting shaft portion 2J (an example of the fitting key member H) are formed. The fitting shaft portion 2J is formed on the base shaft portion 8 in a shape having an outer peripheral shape that fits and locks with a fitting step portion 4c formed on the inner peripheral portion of the cylindrical portion distal end portion 1S of the cylindrical portion 1. Have been.
When the fitting operation of fitting the shaft portion 2 to the cylindrical portion 1 is performed, the ridge 11 formed at the distal end portion 2S of the shaft portion is fitted into the circumferential groove 5 formed at the base end side of the cylindrical portion, and The protrusion 11 of the cylindrical end face 1T is fitted into the joint recess 13 of the end face 2T facing the cylindrical part 1 side of the part 2, and the fitting shaft 2J is fitted and engaged in the fitting step 4c at the same time. You.
With the above configuration, the relative rotation of the columnar bodies A1 and A2 around the axis X can be prevented only by the fitting operation by the close movement of the columnar bodies A1 and A2.
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 point-symmetric polygonal shapes, the position where the fitting shaft portion 2J faces the fitting step portion 4c. Even if they are misaligned, they can be fitted and connected by rotating one of the columnar bodies while the fitting shaft 2J is kept in contact with the fitting step 4c.
Furthermore, 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, the fitting can be performed only at a fixed position. This is convenient when it is desired to match the directions.
The other structures and the points of the construction are the same as those of the columnar body, and the description is omitted.

Next, a ninth embodiment shown in FIGS. The columnar body of this embodiment is different from the previous columnar body in the shape of the rotation preventing mechanism M. The step 1D formed on the base end side of the cylindrical portion inner peripheral surface 4 has a circumferential groove 5D. Is provided, and the cylindrical portion distal end 1S is formed in a stepped shape having an outer diameter smaller than the outer diameter of the cylindrical portion base end side, and the bolt insertion holes 32 are formed at a plurality of positions in the circumferential direction of the cylindrical portion distal end 1S. (An example of the concave portion E) is provided.
The shaft portion 2 has a vertical shaft outer peripheral surface 10 having an outer diameter which is continuous with a base shaft portion 8 having the same outer diameter as the outer diameters of the steel pipe columnar bodies A1 and A2, and whose outer periphery is in contact with the cylindrical inner peripheral surface 4 of the cylindrical portion 1. A projection 11 is formed on the shaft end portion 2 </ b> S to be fitted into the circumferential groove 5 of the cylindrical portion 1.
In addition, a joint recess 13 that joins with the tip portion 1S of the cylindrical portion 1 of the tubular portion 1 is provided around the upper portion of the base shaft portion 8, and an inner peripheral surface of the shaft portion with the joint recess 13 interposed from the outer peripheral surface of the base shaft portion 8. Are formed at positions corresponding to the bolt insertion holes 32 provided in the cylindrical end portion 1S.
When the shaft portion 2 is fitted to the cylindrical portion 1, the bolt insertion hole 32 formed in the distal end portion 1 </ b> S of the cylindrical portion is inserted into the bolt insertion hole 33 of the base shaft portion 8 (an example of the concave portion E). When the bolt 34 (an example of a fitting key member) is screwed from the insertion hole 32 to the inner peripheral surface of the shaft portion through the insertion hole 33 by performing a fitting operation according to the core, the bolt 34 (an example of a fitting key member) is provided at the shaft tip portion 2S. The cylindrical portion 1 and the shaft portion 2 can be fitted and connected in a state where the projected ridge 11 is fitted into the peripheral groove 5 and the cylindrical portion distal end portion 1S is fitted into the joint concave portion 13.
With the above configuration, the bolts 34 can prevent the columnar bodies A1 and A2 from rotating relative to each other around the axis X, and also have the function of preventing the columnar bodies A1 and A2 from coming off. .
In addition, since other structures and the points of construction are the same as those of the columnar body, the description thereof is omitted.

Next, a tenth embodiment shown in FIGS. The columnar body of this embodiment is different from the previous columnar body in the shape of the rotation preventing mechanism M. The columnar body axis perpendicular to the inward groove 6 is formed in the cylindrical inner peripheral surface 4 of the cylindrical portion 1. A plurality of cylinder key grooves 35 extending in the X direction are provided, and a plurality of shaft key grooves 36 extending in the X axis direction of the columnar body orthogonal to the outward groove 12 are formed on the outer peripheral surface 2G of the shaft 2. A key plate 38 is fitted in one of the key grooves 35, 36 and fastened with bolts 37 as necessary. At this time, the thickness of the key plate 38 in the radial direction of the columnar body connection portion B is formed so as to protrude from the internally fitted key groove in the radial direction by the depth of the opposing key groove.
When fitting the shaft portion 2 to the cylindrical 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 internally fitted in the key groove 35 or 36. Then, the key plate 38 is inserted and engaged so as to straddle both key grooves 35 and 36.
With the above configuration, the relative rotation of the columnar bodies A1 and A2 in the axis X direction can be prevented only by the fitting operation by the close movement of the columnar bodies A1 and A2. Note that the other points of the structure and the construction are the same as those of the columnar body, and the description thereof will be 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 preventing mechanism M. The outer diameter of the cylindrical portion 1 is the same as the outer diameter of the steel pipe columnar body A1. The inner periphery of which is formed in a vertical inner peripheral surface 4 of the cylindrical portion into which the shaft portion 2 fits, and the bolt insertion hole 40 (through the recess E of the concave portion E) penetrating through the outer peripheral surface 1G of the shaft portion. Are formed in the circumferential direction. Further, a protruding shape 11 is provided around the distal end portion 1S of the cylindrical portion.
The shaft portion 2 is formed on a vertical shaft outer peripheral surface 10 whose outer diameter is continuous with the base shaft portion 8 having the same outer diameter as the outer diameter of the steel pipe columnar body A2, and whose outer periphery is engaged with the cylindrical inner peripheral surface 4 of the cylindrical portion 1. The fitting portion 9 is formed with a bolt at a position facing the bolt insertion hole 40 formed in the tubular portion 1 when the fitting portion 9 is fitted into the inner peripheral surface 4 of the tubular portion. An insertion hole 41 (an example of the concave portion E) is formed. A protruding ridge 11 that fits into the circumferential groove 5 of the cylindrical portion 1 is provided at the shaft distal end portion 2S, and a protrusion formed at the cylindrical distal end portion 1S of the cylindrical portion 1 is provided above the base shaft portion 8. A joining recess 13 that joins with the ridge 11 is provided around.
When fitting the shaft portion 2 to the cylindrical portion 1, a fitting operation is performed in which the bolt insertion hole 40 provided in the cylindrical portion 1 is aligned with the bolt insertion shaft core of the bolt insertion hole 41 formed in the fitting insertion portion 9. When the bolt 42 (an example of the fitting key member H) is threadedly connected so as to straddle both the insertion holes 40 and 41, the protruding ridge 11 provided at the shaft end portion 2 </ b> S fits into the circumferential groove 5. At the same time, the cylindrical portion 1 and the shaft portion 2 can be fitted and connected in a state in which the ridge 11 formed on the distal end portion 1S of the cylindrical portion is fitted in the joint concave portion 13.
According to the above configuration, the relative rotation of the columnar bodies A1 and A2 around the axis X can be prevented (an example of the detent mechanism M) by the tightening operation of the bolt 42, and the adjacent columnar bodies can be disengaged from each other. It can be connected to the stop state (an example of the connection mechanism S).

[Another embodiment]
Hereinafter, other embodiments will be described.
<1> The key member used for the columnar body connection mechanism is not limited to the arc key described in the above embodiment. For example, a C-shaped elastic ring key is housed in an inward groove or an outward groove. Alternatively, a configuration may be adopted in which the fitting is performed so as to straddle the inward groove portion and the outward groove portion with the fitting operation between the cylindrical portion and the shaft portion.
With this configuration, the adjacent columnar bodies can be connected to each other in a state where they cannot be removed only by the operation of fitting the shaft portion to the cylindrical portion.
<2> Although the steel tube column has been described in the above embodiment, the application of the present invention is not limited to the steel tube column. For example, concrete columns, composite columns, etc., other than those using steel pipes such as sheet piles. The present invention can be applied to a columnar body formed using another material as long as the columnar body connecting portion formed as in the configuration of the present invention can be provided.

FIG. 2 is a half cutaway side view showing the first embodiment of the present invention. FIG. 1 is a half plan sectional view taken along the line II FIG. 1 is a half sectional plan view of the rolled wire. Half side sectional view showing the upper column and the lower column separated from each other. Enlarged side sectional view of the engagement part by the arc key FIG. 4 is a half cutaway side view showing a second embodiment of the present invention. FIG. 4 is a half cutaway side view showing a third embodiment of the present invention. Explanatory drawing showing a fourth embodiment of the present invention. Explanatory drawing showing a fifth embodiment of the present invention. Explanatory drawing showing a sixth embodiment of the present invention. Explanatory drawing showing another form of the sixth embodiment of the present invention. Explanatory drawing showing a seventh embodiment of the present invention. Explanatory drawing showing an eighth embodiment of the present invention. Explanatory drawing showing a ninth embodiment of the present invention. Explanatory drawing showing a tenth embodiment of the present invention. Explanatory drawing showing an eleventh embodiment of the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Cylindrical part 1D step part 2 Shaft part 2S Shaft tip part 4 Cylindrical part inner peripheral surface 5 Peripheral groove 6 Inward groove part 10 Shaft part outer peripheral surface 11 Ridge 12 Outward groove part 18 Key member B Column member connection part X Column shaft Core S Connection mechanism M Non-rotating mechanism E Recess H Fitting key member A1 Column A2 Column

Claims (2)

Each of the two end portions of the columnar body, a connecting portion for an adjacent columnar body is provided, and the connecting portion of the columnar body adjacent in the axial direction of the columnar body is configured to be freely connectable to each other,
One of the two 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 which can be internally fitted in the cylindrical portion, and adjacent connecting portions are formed so as to be fittable. ,
A connection mechanism capable of connecting adjacent columnar bodies to each other in a retaining state, and a rotation preventing mechanism for preventing relative rotation of the connected columnar bodies around an axis thereof, provided in the connection portion,
The connection mechanism provided on the counter portion and the shaft portion outer circumferential surface of the shaft portion and the cylindrical inner peripheral surface of the cylindrical portion is opposed,
The said connecting mechanism and the tubular portion and the shaft portion provided with a fitting key a separate member, while the fitting and said tubular portion of the columnar body adjacent the shaft portion connected together, connect columnar A columnar body which constitutes the detent mechanism for preventing relative rotation of the bodies about their axis. A concave portion is formed in one or both of the cylindrical portion and the shaft portion, and the cylindrical portion and the shaft are connected to each other while the cylindrical portion and the shaft portion of the adjacent columnar body are connected to each other. The mating key member is fitted into one of the concave portions of the portion, and the mating key member is fixed to the other, and the relative rotation of the connected columnar bodies around the axis is prevented. The columnar body according to claim 1, wherein the columnar body constitutes a stopping mechanism .