JP2013227809A - Joint part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive joint part structure capable of stably connecting members such as steel pipes.SOLUTION: A joint part structure 2 includes a pair of joint members 4 and 5 relatively movable mutually in predetermined directions for overlapping each other at predetermined positions in the moving directions, and a movement inhibiting pin member 6 for penetrating through a pair of insertion holes 15 and 16 formed in the joint members, respectively, and continuous with each other in the overlapping direction. A tapered fitting-in part 18 is formed on the outside face of the movement inhibiting pin member 6 and a tapered fitted-in part 17 to be fitted in the fitting-in part 18 is formed over the inner peripheral faces of both insertion holes 15 and 16. In the state that the outside face of the fitting-in part 18 closely contacts the inside face of the fitted-in part 17, the movement inhibiting pin member 6 penetrates through the insides of both insertion holes 15 and 16.

Description

  The present invention relates to a joint structure for connecting members used in, for example, steel pipe piles, steel pipe sheet piles, steel pipes for pipe roof construction methods, pillars for buildings, water pipes, and the like.

  Conventionally, in the construction of long steel pipe piles, steel pipe sheet piles, etc., it is desirable to carry steel pipe materials of a fixed size to the construction site for convenience of transportation and production, and connect each steel pipe material by welding at the construction site. Was the length of the.

  However, such joining work by welding requires skillful techniques, and also requires strict construction management in terms of ensuring working conditions such as climatic conditions and quality control of welds. Furthermore, the ratio of the time spent for such welding work to the construction time is large, which causes the construction period to be prolonged.

  Therefore, as a joint part structure in which each steel pipe material can be easily connected in a short period of time at the construction site, the end part of the other steel pipe material is fixed in the cylindrical outer joint member fixed to the end part of one steel pipe material to be connected to each other. The cylindrical inner joint member fixed to the joint member is fitted, the insertion holes formed in the joint members are aligned in this state, and the pin member is passed therethrough to restrict the rotation in the pipe circumferential direction. A structure for connecting joint members has been developed (for example, Patent Document 1).

JP 2000-319874 A

  However, in the conventional technique as described above, since the fitting between the insertion hole formed in both joint members and the pin member is set so that the cylindrical pin member can be easily inserted, the inner periphery of the insertion hole is set. There is a possibility that a gap is generated between the surface and the outer peripheral surface of the pin member, and rattling occurs between both joint members.

  Further, when a gap is generated between the inner peripheral surface of the insertion hole and the outer peripheral surface of the pin member, if a tensile force acts between the joint portions, that is, both joint members in the tube axis direction, the pin member is bent together with the shearing force. Since the moment acts, in order to ensure sufficient tensile strength in the pipe axis direction at the joint in consideration of the bending moment, an arc shape straddling between the outer peripheral surface of the outer joint member and the outer peripheral surface of the inner joint member There is a problem that a complicated structure such as providing a key member is required and the cost increases.

  In view of such a conventional problem, the present invention has been made for the purpose of providing a joint structure that can stably connect members such as steel pipes and is inexpensive.

  The feature of the invention described in claim 1 for solving the conventional problems as described above and achieving the intended object is a pair of features that can move relative to each other in a predetermined direction and are overlapped at a predetermined position in the movement direction. A joint member, and a movement-inhibiting pin member that penetrates across a pair of insertion holes that are continuous in the overlapping direction at the predetermined position formed in each joint member, and through the movement-inhibiting pin member It is a joint part structure in which both joint members are connected, and a taper-like fitting part is formed on the outer surface part of the movement restraining pin member and straddles the inner peripheral surface of the both insertion holes. A tapered hole-like fitting portion into which the fitting portion is fitted is formed, and the movement-suppressing pin member is inserted into the insertion portion in a state where the outer surface of the fitting portion is in close contact with the inner side surface of the fitting portion. This is because it is penetrated through the hole.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, a reinforcing member is provided on the surface portion of the one joint member so that a tip of a pin member for movement suppression protruding from the surface portion is fitted. It is in.

  According to a third aspect of the present invention, in addition to the structure of the first or second aspect, each of the joint members is fixed to the end of one of the pipe members connected to each other toward the pipe axis direction. A cylindrical outer joint member, and a cylindrical inner joint member fixed to the end of the other pipe member in the tube axis direction, the two joint members being moved in the tube axis direction, The inner joint member is fitted into the joint member.

  According to a fourth aspect of the present invention, in addition to the configuration of the third aspect, the outer joint member includes a taper-shaped widening portion for fitting that expands toward the other pipe material side on the inner peripheral portion, The inner joint member is provided with a tapered reduced diameter portion for fitting which is reduced in diameter toward the one pipe material side which is fitted to the widened portion for fitting on the outer peripheral portion.

  As described above, the joint part structure according to the present invention includes a pair of joint members that can move relative to each other in a predetermined direction and are overlapped at a predetermined position in the movement direction, and the predetermined positions formed on the respective joint members. A joint member structure that includes a movement-inhibiting pin member that penetrates across a pair of insertion holes that are continuous in the overlapping direction, and the joint members are connected to each other through the movement-inhibiting pin member. In addition, a taper-like fitting portion is formed on the outer surface portion of the movement restraining pin member, and a taper-hole-like fitting portion into which the fitting portion is fitted across the inner peripheral surfaces of the both insertion holes is provided. By forming the movement inhibiting pin member so as to pass through both the insertion holes in a state where the outer surface of the fitting portion is in close contact with the inner surface of the fitted portion, both joints are formed. While preventing backlash between members, Suppressing rotation moment acting on the movement restraining pin member, it is possible to obtain a high yield strength against tensile load applied between both joint members.

  Further, in the present invention, a cross-sectional defect portion due to the provision of the insertion hole is provided on the surface portion of the one joint member by including a reinforcing member into which the tip of the movement restraining pin member protruding from the surface portion is fitted. Can be reinforced.

  Further, in the present invention, each of the joint members is a cylindrical outer joint member fixed to the end of one pipe connected to each other in the pipe axial direction, and the pipe axial direction to the end of the other pipe. A cylindrical inner joint member that is fixed toward the inner joint member, wherein both the joint members are moved in the tube axis direction so that the inner joint member is fitted into the outer joint member, thereby preventing movement. Both joint members can be connected in a state in which movement in the pipe axis direction and the pipe circumferential direction is prevented by the pin member for use.

  Furthermore, in the present invention, the outer joint member includes a taper-shaped widening portion for fitting that is widened toward the other pipe side on the inner peripheral portion, and the inner joint member has the widening portion for fitting on the outer peripheral portion. In addition, the inner joint member can be easily inserted into the outer joint member by providing the tapered reduced diameter portion for fitting that is reduced in diameter toward the one pipe material side that is fitted to each other.

It is a front view which shows an example of the steel pipe pile using the joint part structure which concerns on this invention. It is a cross-sectional view which shows the joint part structure in FIG. It is a partial expanded longitudinal cross-sectional view which shows a joint part structure same as the above. It is a partial expansion longitudinal cross-sectional view which shows the state which removed the pin member for movement suppression same as the above. It is a partial expanded longitudinal cross-sectional view which shows the state which isolate | separated both joint members same as the above. (A) The front view which shows the pin member for movement suppression same as the above, (b) is the top view, (c) is the bottom view.

  Next, an embodiment of the joint structure according to the present invention will be described based on the embodiment shown in FIGS. In addition, the code | symbol 1 is a steel pipe material used for a steel pipe pile, a steel pipe sheet pile, etc. in the figure.

  Each steel pipe material 1 is formed in a cylindrical shape with a steel material, and the steel pipe materials 1 and 1 are connected to each other by a joint 2.

  The joint 2 includes an outer joint member 4 fixed to an end portion of one steel pipe member 1 to be connected, and an inner joint member 5 fixed to an end portion of the other steel pipe member 1 via a flange member 3. Both joint members 4 and 5 are moved relative to each other in the pipe axis direction, the inner joint member 5 is fitted in the outer joint member 4 and overlapped in the pipe radial direction, and in this state, both joint members 4 and 5 are used for restraining movement. The pin members 6, 6... Are penetrated in the overlapping direction, that is, the pipe radial direction, so that both the joint members 4 and 5 are connected so as to be immovable in the pipe circumferential direction and the pipe axis direction.

  The flange member 3 is formed in an annular shape having a constant thickness in the tube axis direction, having an outer diameter substantially the same as the outer diameter of the steel pipe material 1 and an inner diameter smaller than the inner diameter of the steel pipe material 1. The flange member 3 has an annular outer peripheral portion of one end face thereof welded to the end face of the steel pipe material 1 and is fixed in a state in which an inner edge side portion protrudes radially inward of the steel pipe material 1, and an inner joint member on the other end face. 5 is fixed by welding.

  A contact stop groove 10 is formed on the end face of the flange member 3 on the side of the joint member, and the distal end portion of the outer joint member 4 is fitted, and the front end portion comes into contact with the bottom of the contact stop groove 10. .

  On the other hand, an annular stopper member 11 having a circular cross section is fixed to the inner side surface portion of the outer joint member 4 by welding or the like, and the tip end portion of the inner joint member 5 is stopped against the stopper member 11. It has become.

  Further, a fitting groove 12 into which the outer surface portion of the stopper member 11 is fitted is formed at the distal end portion of the inner joint member 5.

  In this manner, the distal end portion of the outer joint member 4 is fitted into the stopper groove 10 and the distal end portion of the inner joint member 5 is fitted to the stopper member 11, thereby causing the lateral load (pipe) of the joint portion 2. High strength can be obtained with respect to a load acting in the radial direction).

  Further, the end of the outer joint member 4 is abutted against the flange member 3 and the end of the inner joint member 5 is abutted against the abutting member 11, whereby the joint members 4 and 5 are compressed by the pipe shaft. It is designed to support each other in the direction.

  The outer joint member 4 is formed in a cylindrical shape with a steel material or the like, and has a tapered hole-shaped widening portion 4a for fitting that expands toward the other steel pipe material 1 side on its inner peripheral portion.

  Further, the outer joint member 4 is formed with a plurality of insertion holes 15, 15... At intervals in the pipe circumferential direction, and the movement-suppressing pin member 6 is interposed between the joint members 4, 5 through the insertion hole 15. It is designed to penetrate through.

  On the other hand, the inner joint member 5 is formed in a cylindrical shape with a steel material or the like, and includes a tapered reduced diameter portion 5a that decreases in diameter as it advances toward the one steel pipe material 1 side. The portion 5a is fitted in the fitting widened portion 4a, and the outer joint member 4 and the inner joint member 5 are overlapped in the pipe diameter direction.

  The inner joint member 5 is formed with a plurality of insertion holes 16, 16... At intervals in the pipe circumferential direction corresponding to the positions of the insertion holes 15, 15.

  The insertion holes 15, 16 corresponding to each other are formed such that the inner side surfaces are continuous in the overlapping direction, that is, the tube diameter direction, so that the movement-suppressing pin member 6 extends through both the insertion holes 15, 16. It has become.

  Each of the insertion holes 15 and 16 is reduced in diameter by the same inclination as it advances in the direction of penetrating the pin member, and is formed into a tapered hole shape having the same diameter on the side to be abutted with each other. By being arranged so as to be continuous in the overlapping direction, a taper hole-like (conical hole shape) fit that decreases in diameter as it advances in the pin member penetration direction over the inner peripheral surfaces of both insertion holes 15 and 16 Part 17 is formed.

  As shown in FIG. 5, the movement-inhibiting pin member 6 is formed in a tapered shape having a steel material with the same inclination as that of the fitted portion 17 in the penetration direction, that is, a truncated cone shape, and is tapered on the entire outer peripheral portion. A shaped fitting portion 18 is formed.

  The total length of the movement-inhibiting pin member 6 is formed to be longer than the thickness of the overlapping portion of the joint members 4, 5, and the diameter of the movement-inhibiting pin member 6 is reduced when passing through the joint members 4, 5. The side tip portion protrudes inward from the inner surface of the inner joint member 5.

  Further, the pin member 6 for restraining movement is formed with a bolt insertion hole 20 directed in the penetrating direction at the center, and an engagement recess 20a having a larger diameter than the bolt insertion hole 20 is formed at the upper end of the bolt insertion hole 20. Has been.

  The inner surface of the inner joint member 5 is provided with a reinforcing member 21 into which the tip of the movement restraining pin member 6 protruding from the inner surface of the inner surface is fitted. It is designed to reinforce.

  The reinforcing member 21 is formed in an elongated band shape or an endless band shape that is long in the pipe circumferential direction, and is fixed to the inner surface of the inner joint member 5 by welding so as to overlap the outer surface.

  In the reinforcing member 21, fitting holes 22, 22... Penetrating in the plate pressure direction according to the position of the insertion hole 16 are formed at intervals in the pipe circumferential direction. The front end portion of the pin member 6 for use is fitted.

  Further, a fixing plate 23 is fixed to the inner side surface portion of the reinforcing member 21 by welding so as to close the inner surface side opening of the fitting hole 22, and the fixing bolt having the bolt insertion hole 20 passed through the fixing plate 23. The front end of 24 is screwed together.

  In order to connect both the pipe materials 1 and 1 using the joint portion structure configured as described above, first, the two joint members 4 and 5 are moved in the pipe axis direction in consideration of the positions of the respective insertion holes 15 and 16. The inner joint member 5 is fitted into the outer joint member 4.

  At this time, since the outer diameter of the distal end portion of the fitting reduced diameter portion 5a of the inner joint member 5 is smaller than the inner diameter of the distal end portion of the fitting widened portion 4a of the outer joint member 4, the inner joint member 5 can be easily placed in the outer joint member 4. It can be inserted, and after the insertion, it can slide to a position where the tip part comes into contact with the stopper groove 10 of the flange member 3 while being guided to each other.

  Then, the movement-inhibiting pin member 6 is inserted into each of the insertion holes 15 and 16 and is inserted until the distal end portion of the movement-inhibiting pin member 6 is fitted into the fitting hole 22 of the reinforcing member 21.

  At this time, even if there is a slight shift in the positions of the insertion holes 15, 16, the movement-inhibiting pin member 6 is provided with a tapered fitting part 18, and the fitting part extends over both the insertion holes 15, 16. Since the insertion portion 17 having a tapered hole shape having the same inclination as 18 is formed, the insertion holes 15, 16 are formed on the outer surface of the movement restraining pin member 6 as the penetration of the movement restraining pin member 6 proceeds. The inner surface is pressed and the joint members 4 and 5 move relative to each other in the direction in which the center positions of the insertion holes 15 and 16 coincide with each other, and the positions of the insertion holes 15 and 16 are aligned to form a continuous arrangement.

  Then, the fixing bolt 24 is passed through the bolt insertion hole 20, the tip of the fixing bolt 24 is screwed into the fixing plate member 23, and the fixing bolt 24 is tightened to further penetrate the movement-suppressing pin member 6. The outer side surface of the first and second insertion holes 15 and 16 is brought into close contact with the inner side surface of the fitted portion 17 formed across the inner side surface portions of the insertion holes 15 and 16.

  Thereby, both the joint members 4 and 5 are connected in a state in which the movement in the pipe circumferential direction and the pipe axis direction is restricted via the respective movement restraining pin members 6, 6.

  Further, in the joint portion structure configured as described above, the movement restraining pin member 6 is inserted into the insertion holes 15 and 16 in a state where the outer surface of the fitting portion 18 is in close contact with the inner surface of the fitted portion 17. Since it penetrates over the inside, it is possible to prevent the joint members 4 and 5 from rattling.

  Further, since no gap is generated between the outer surface of the movement restraining pin member 6 and the inner surfaces of the insertion holes 15 and 16, it acts on the movement restraining pin member 6 when a tensile force acts in the tube axis direction. Therefore, the strength against the force in the tensile direction of the movement-inhibiting pin member 6 is increased, and a high tensile strength can be obtained without using a key member.

  In the above-described embodiment, the example in which the joint structure according to the present invention is used for connection between steel pipe materials used for steel pipe piles and steel pipe sheet piles has been described. It can apply to the connection of the pipe materials used for a material, a water pipe line, etc. Moreover, you may use the joint part structure of the pipe material which concerns on this invention for the connection of SC pile or a concrete pile.

  Moreover, you may use for the connection of the steel pipe part and spiral blade part of the spiral steel pipe which has the spiral blade for excavation in the front-end | tip part used for a rotation propulsion pile. In particular, in the case of a spiral steel pipe, it can be efficiently transported by separately transporting the spiral blade part and the steel pipe part, while both can be easily and shortly connected at the construction site.

  Moreover, although the example which formed the joint member in the cylindrical shape was demonstrated in the above-mentioned Example, a rectangular tube shape may be sufficient and it may be formed in flat form.

DESCRIPTION OF SYMBOLS 1 Steel pipe material 2 Joint 3 Flange member 4 Outer joint member 5 Inner joint member 6 Movement suppression pin member 10 Stopping groove 11 Stopping member 12 Fitting groove 15 Insertion hole 16 Insertion hole 17 Insertion part 18 Insertion part 20 Bolt insertion hole 21 Reinforcing member 22 Fitting hole 23 Fixing plate 24 Fixing bolt

Claims (4)

A pair of joint members that can move relative to each other in a predetermined direction and overlap each other at a predetermined position in the moving direction, and penetrate through a pair of insertion holes that are continuous in the overlapping direction at the predetermined position formed in each joint member And a joint member structure that is configured such that the joint members are connected via the movement restraining pin member.
A tapered fitting portion is formed on the outer surface portion of the movement restraining pin member, and a tapered hole-like fitting portion is formed in which the fitting portion is fitted across the inner peripheral surfaces of the both insertion holes. And
A joint part structure characterized in that the movement-suppressing pin member is penetrated across both the insertion holes in a state in which an outer side surface of the fitting part is in close contact with an inner side surface of the fitted part.   The joint part structure according to claim 1, further comprising: a reinforcing member into which a tip of a movement-suppressing pin member protruding from the surface part is fitted on the one joint member surface part.   Each of the joint members is fixed to the end of one pipe connected to each other in the tube axial direction and fixed to the end of the other pipe in the tube axial direction. The joint part according to claim 1 or 2, wherein the inner joint member is fitted into the outer joint member by moving both the joint members in the tube axis direction. Construction.   The outer joint member includes a taper-shaped widening portion for fitting which is expanded toward the other pipe side on the inner peripheral portion, and the inner joint member is fitted to the widening portion for fitting on the outer peripheral portion. The joint structure according to claim 3, further comprising a tapered reduced diameter portion for fitting that is reduced in diameter toward the one pipe material side.

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