JP6279637B2 - Ring body manufacturing method, ring body, and joint metal fitting using ring body - Google Patents

Description

  The present invention relates to a manufacturing method of a ring body that is arranged between wood structure materials arranged adjacent to each other, a ring body, and a joining metal fitting using the ring body.

Conventionally, when two adjacent wood structure materials are joined (connected), a joining metal fitting is arranged on the joining surface of the wood structure material.
Non-Patent Document 1 is shown as a document disclosing such a bonding structure bonding method. In this document, for example, there is a structure shown in FIG. 17 (refer to FIG. 6-70 in the document) as the simplest bonding structure in which the fittings are arranged. In this case, when the diagonal member 100 is fixed on the beam 101, the joints 102 and 103 are formed in the diagonal member 100 and the beam 101, respectively, and after fitting, the bolts 104 are inserted and fixed in the vertical direction. is there. Further, as a joining means having higher strength than this, there is one shown in FIG. In this ring ring 105, which is a ring body having no bottom on the joint surface, is embedded between the joint surfaces of the wooden structure material 106, and at the same time, through bolts 107 are inserted between the two wooden structure materials 106 and fixed in the ring gibell 105. To do.

Written by Kazuo Goto, “Calculation of Tree Structure”, Kashima Press, April 5, 1980, p. 178, p. 206

In such a joining structure, when considering the shearing direction force (force in the direction in which the joining surfaces slide relative to each other), as compared with the case where only the through bolt 104 as shown in FIG. Since the strength (strength) of the joint structure portion with respect to the shearing force is improved by disposing both the ring gibber 105 and the through bolt 107 as shown in FIG. It is good to arrange.
However, a ring body embedded in a conventional wooden structure material such as the ring gibel 105 is used by cutting a steel pipe into a ring, and has been required to have a higher strength. In particular, since the insertion end portion of the ring body is disposed at the innermost portion of the wooden structure material and is easily deformed by an external force, a ring body having a high strength at the insertion end portion has been demanded.
An object of the present invention is to provide a method for manufacturing a ring body in which the strength of the insertion end portion of the ring body disposed between the wooden structures is increased, and the ring body and the ring body manufactured by such a method. The purpose is to provide a used fitting.

To achieve the above object insertion, as a means 1, are disposed at the junction between the wooden structural member and the structural framework, the insertion end side of the axial end portion to the wooden structural material surface formed in the recess of the A method of manufacturing a ring body that is embedded and arranged to be used as a joint fitting together with a bolt member and a nut member, wherein a flat blank is placed on a die and the blank is punched on the die side by punching A cylindrical container-shaped intermediate work body composed of a bottom portion that forms a circular outer periphery and a cylindrical portion that rises from the outer periphery of the bottom portion is formed by punching into the blank, and the bottom portion of the obtained intermediate work body is bulged inward. The insertion end portion is formed by hollowing out so as to leave the meat in a flange shape so as to communicate with the front and rear.
By adopting such a configuration, the ring body is plastically deformed, and the communication holes are formed in the front and rear in the axial direction so as to leave a flange-like meat at the insertion end, so that the conventional steel pipe is cut into a ring. The strength of the ring body is higher, and the compression strength and shear strength in the radial direction of the ring body can be improved by arranging such a ring body as a joint fitting at the joint between the wooden structure and the structural frame. As a result, an improvement in the strength of the joint structure using such a ring body can be expected.

  Here, “woody structural material” means, for example, a wooden frame member represented by a pillar and a beam (for example, shed, joist, bundle, base, rafter, purlin, purlin, diagonal materials such as braces, etc. ), Or a single structural material that is joined together (for example, when a pillar, a beam, or a wall laminated material is formed from a plurality of plate materials). In addition, the “structural frame” is a concept that includes members other than a wooden structure material that is widely used as a framework for constructing a wooden building. For example, it is widely used for foundations, walls, pillars, horizontal members (beams, etc.), huts, joists, bundles, foundations, rafters, purlins, girders, diagonal materials such as braces.

Further, as means 2, the blank is formed in a circular outer peripheral shape and is placed on a die without being fixed when punching.
Examples of punching processes that push the blank into the hole on the die side include, for example, a drawing process that deforms into a die hole shape without fixing a flat blank, or an overhang process that stretches and deforms the blank with a punch while the blank is fixed. Is mentioned. Here, it is a case of drawing processing in which the material is compressed and plastically deformed, and the strength after processing becomes very high.
Further, as the means 3, the blank is punched so that the circular peripheral edge becomes the base end of the cylindrical portion of the intermediate workpiece.
If it shape | molds in this way, it can shape | mold so that a flange may not remain in the base part of a cylindrical part, and it is advantageous also on a process.
As the means 4, when the intermediate workpiece is punched, it is formed from the blank by a single punching operation with respect to the hole on the die side.
This simplifies the machining process and, as a result, reduces the manufacturing cost of the ring body.

Further, as the means 5, a ring body is manufactured by the method for manufacturing a ring body according to any one of means 1 to 4.
If such a ring body is used as a joint fitting, the strength of the joint structure is improved.
Further, as the means 6, the bottom portion is cut and hollowed out at a position close to the cylindrical portion.
Thus, when the bottom portion is largely cut so that the flange portion protruding to the inner periphery remains, a concave portion to be embedded in the wooden structure material can be formed in a ring shape. That is, since it is possible to leave meat also on the inner side surrounded by the recess, the ring body can be brought into close contact with the wooden structure material from the inside and outside while being embedded in the recess. Therefore, when a shearing force is applied, the force is transmitted to and from the wooden structure material not only from the outside of the ring body but also from the inside, and the force is distributed in a balanced manner.
Further, as means 7, a first plate disposed at a connecting portion between the first wooden structure material and the second wooden structure material, and abutting against the first wooden structure material, and the first plate And a second plate inserted into a slit formed in the second wood structure material , and the ring body according to the means 5 or 6 is provided on the front surface of the first plate. The insertion end is fixed by welding so as to face forward.
This means is a specific structure of the joint fitting to which the ring body manufactured by the method of the present invention is applied. If the first wood structure material and the second wood structure material are joined by such a joint fitting, the strength of the joint structure can be expected to be improved as compared with the case where a ring body having a conventional ring body is used.

As the means 8, the ring body described in the two means 5 or 6 was welded in the axial direction so that the insertion end portions were directed in opposite directions.
As a result, when the structural frame is a wooden structure material (as in the case where the first wooden structure material and the second wooden structure material are connected as described above), the connection structure has a high height to each wooden structure material. It becomes possible to embed and arrange a strong insertion end. Moreover, such a joining metal fitting improves radial shear and compressive strength as compared with a single ring body.
Further, as the means 9, the inner diameters of the two ring bodies in the means 8 on the insertion end side are the same diameter.
As described above, if the inner diameters of the two ring bodies on the insertion end side are the same, the two wooden structures may be embedded in either direction, which is advantageous in terms of work.
Further, as the means 10, the inner diameters of the two ring bodies in the means 8 on the insertion end side are different from each other.
In this way, if the inner diameters of the two ring bodies on the insertion end side are different from each other, the inner diameters according to the functions can be configured when the wooden structure material and the structural frame have different functions.

  According to the present invention, the compressive strength and shear strength in the radial direction of the ring body are improved, and as a result, it can be expected that the strength of the joint structure using such a ring body is improved.

(A) of the ring body used for Example 1 of this invention is a perspective view, (b) is a sectional side view fractured | ruptured in the center position. (A) of the ring body used for Example 2 of this invention is a perspective view, (b) is a sectional side view fractured | ruptured in the center position. (A) is a perspective view and (b) is a fragmentary sectional view fractured | ruptured in the center position of the ring gibel of Example 3 which welded the ring body of two Examples 1 back to back. 4 is a ring gibel of Example 4 in which the ring body of Example 1 and the ring body of Example 2 are welded back to back, (a) and (b) are perspective views, and (c) is a partial cross-section broken at the center position. Figure. Explanatory drawing explaining the joining method which joins a column and a beam using the joining metal fitting which used the ring body of Example 1 as a ring gibell. The partial perspective view which shows the joining surface of the column in which the joining metal fitting is joined in Example 1. FIG. The perspective view of the joining metal fitting of Example 2. FIG. Explanatory drawing explaining the junction structure which used the ring jib shown in FIG. 3 between the pillar and the bracing in Example 3. FIG. (A) of the lag screw bolt used for Example 4 is a front view, (b) is a longitudinal cross-sectional view. The perspective view of the column base metal used for Example 4. FIG. (A) And (b) is explanatory drawing explaining the junction structure which used the ring gibell shown in FIG. 4 in Example 4 between the pillar and the column base metal. It is a schematic diagram of the punching apparatus for shape | molding the intermediate workpiece which is a precursor of a ring body, Comprising: Explanatory drawing explaining the state which has arrange | positioned the blank in the processing position. . It is a schematic diagram of the same punching apparatus, Comprising: Explanatory drawing of the state which the punch moved down from the state of FIG. 12 and reached the blank position. FIG. 14 is a schematic diagram of the same punching device, and is an explanatory diagram of a state immediately after the punch is moved down from the state of FIG. 13 to form an intermediate workpiece. It is a schematic diagram of the same punching apparatus, Comprising: The explanatory view of the state which the punch moved up from the state of FIG. 14, and took out the intermediate workpiece on the die. It is explanatory drawing explaining the shaping | molding procedure of a ring body, (a) is the fragmentary sectional view which fractured | ruptured the blank before shaping | molding in the center position, (b) was the fragmentary sectional view which fractured | ruptured the intermediate processing body shape | molded with the punch in the center position FIG. 4C is a partial cross-sectional view of a ring body obtained by cutting the bottom surface of the intermediate workpiece at a central position. Explanatory drawing explaining the joining structure of the diagonal and beam which used the conventional through bolt. Explanatory drawing explaining the joining structure of the wooden structure materials using the conventional through-bolt and ring gibell.

Hereinafter, a manufacturing method of a ring body which is one embodiment of the present invention and a joining structure using a ring body manufactured by such a manufacturing method will be described based on the drawings.
First, an outline of a method for manufacturing a ring body will be described with reference to FIGS. 12 to 15 are schematic views of a punching apparatus for forming (manufacturing) a cylindrical container-shaped intermediate processed body M, which is a precursor of a ring body, from a disk-shaped iron-based alloy blank B. FIG.
A die 2 made of carbon tool steel is formed with a hole 2 having a perfectly circular cross section communicating in the vertical direction. A positioning plate 3 is installed at a position adjacent to the upper opening 2 a of the hole 2 on the upper surface of the die 1. A ram 4 is disposed inside the hole 2 so as to be movable up and down. The ram 4 is a cylindrical body configured to be slightly smaller in diameter than the inner diameter of the hole 2.
On the upper surface of the die 1, a jig plate 6 for removing a press product supported by the post 5 is disposed at a distance from the die 1. A circular through hole 7 having a diameter slightly smaller than the diameter of the hole 2 is formed in the jig plate 6. The center of the through hole 7 coincides with the center of the hole 2. A punch 8 is arranged above the die 1 in a line connecting the hole 2 and the through hole 7 of the jig plate 6. The punch 8 is a cylindrical body having a diameter slightly smaller than the inner diameter of the through hole 7. The punch 8 and the ram 4 are supported by a rod 9 and are configured to move up and down using a hydraulic device (not shown) as a drive source. As shown in FIG. 12, the punch 8 is disposed above the jig plate 6 as the original position, moves downward, passes through the through hole 7, and reaches the hole 2 of the die 1. On the other hand, as shown in FIG. 12, the ram 4 is placed with the upper surface of the die 1 as the uppermost position as shown in FIG. 12, and the punch 8 moves down when it reaches a predetermined height position with respect to the die 1. So that it is controlled. The lowering speeds of the punch 8 and the ram 4 are synchronized. In the present embodiment, the predetermined height position is a height position corresponding to the thickness of the blank B from the upper surface of the die 1. This position can be changed. The position of the punch 8 and the position of the ram 4 are detected by a position sensor (not shown) (for example, a rotary encoder that measures the amount of advancement of the rod).

Next, a process of forming the intermediate workpiece M from the blank B by the punching device having such a configuration will be described.
As shown in FIG. 12, the blank B is set so as to close the hole 2 on the upper surface of the die 1 with the punch 8 in the original position. In the set-like body, the blank B is accommodated in the region surrounded by the positioning plate 3 and the movement in the lateral direction is restricted. The center of the punch 8 and the center of the blank B coincide. At this time, the ram 4 is also moved upward so as to face the upper opening 2a of the hole 2, and supports the blank B from below. Then, the punch 8 is moved downward from this state. As shown in FIG. 13, when the punch 8 passes through the through hole 7 and reaches the upper surface of the blank B, the punch 8 is pushed downward into the hole 2. As the punch 8 moves downward, the ram 4 moves downward in synchronization with the distance from the punch 8 maintained. The blank B is pushed by the punch 8 and is plastically deformed. At this time, there is no significant deformation in the portion that becomes the bottom surface sandwiched between the ram 4 and the punch 8, but the cylindrical side surface sandwiched between the punch 8 and the die 1 and the corner portion that is the connection portion between the side surface and the bottom surface are The material is compressed and undergoes large plastic deformation. The downwardly moving punch 8 stops at the position shown in FIG. At this position, all of the blank B is pushed into the hole 2 to form a cylindrical container-like intermediate processed body M in the state of (b) from the flat plate state of FIG.
Here, the punch 8 and the ram 4 are moved upward as the hydraulic device is controlled based on the position detection information of the position sensor. The ram 4 stops at the original position in FIG. On the other hand, since the intermediate workpiece M is stuck to the outer surface of the punch 8 without being released, the intermediate workpiece M is lifted above the die 1 as the punch 8 moves upward. When returning to the original position through the hole 7, the jig plate 6 interferes with the jig plate 6 around the through hole 7 and falls onto the ram 4 (state shown in FIG. 15). The obtained intermediate processed body M has a flat bottom 10, a wall 11 that circulates in a cylindrical shape that rises substantially perpendicularly to the bottom 10 from the periphery of the bottom, and an outer surface at the intersection of the bottom 10 and the wall 11. And a corner portion 13 formed by bending. The inner peripheral shape of the intermediate processed body M follows the outer peripheral shape of the punch 8. The peripheral edge of the blank B is the base end of the wall 11 of the intermediate workpiece M. The base end part of the wall part 11 exists on the same plane. The punch 8 has a slightly wider diameter on the upper side, and the hole 2 has a slightly wider diameter on the upper opening 2a side. This facilitates removal of the intermediate workpiece M from the punch 8.
A known shearing process (drilling process) is performed on the bottom 10 of the intermediate workpiece M obtained in this way, and unnecessary parts are cut so as to be hollowed out. The ring body 15 of (c) can be obtained. The ring body 12 is formed with a shallow flange 16 projecting toward the inner periphery by cutting the bottom 10. The end portion on the flange 16 side is an insertion end portion 17 when a joining metal fitting is used.
Further, by changing the type of punch, for example, a ring body 19 having a flange 18 that projects greatly as shown in FIGS. 2A and 2B can be formed.

Next, specific examples of the ring body manufactured by the above process will be described.
Example 1
5 is an example in which the ring body 15 shown in FIGS. The joining bracket 21 forms a basic T-shaped basic skeleton by a base plate 22 having a vertically long rectangular appearance and a substantially rectangular insertion plate 23 extending rearward at the center position in the left-right direction on the back of the base plate 22. The vertical lengths of the base plate 22 and the insertion plate 23 are equal, and the insertion plate 23 is about 2.5 times as wide as the width of the base plate 22. The insertion plate 23 is fixed to the base plate 22 by welding. Two ring gibels 20 (ring bodies 15) are fixed to the front surface of the base plate 22 by welding at intervals in the vertical direction (vertical direction). The outer diameter of the ring gibell 20 matches the width of the base plate 22. The ring gibell 20 is fixed so that the insertion end 17 side is the front end.
A through hole 24 is formed at the center position of the ring jib 20 to communicate the base plate 22 with the front and back sides. The insertion plate 23 is formed with an arch-shaped notch 25 communicating in the left-right direction at a position facing each through hole 24 of the base plate 22. Near the front end of the insertion plate 23, pin holes 26 communicating in the left-right direction are formed at two locations along the up-down direction. A pin receiving portion 27 opened upward is formed above the pin hole 26.

Next, an example of a specific construction method of the joint structure between the column 28 and the beam 29 using such a joint fitting 21 will be described.
First, the joining bracket 21 is attached to the column 28. As shown in FIG. 6, a groove 30 is formed on the contact surface 28 a of the column 28 at the attachment position of the joint fitting 21. A first insertion hole 31 is formed at the center position of the groove 30 from the abutting surface 28a to the opposing surface 28b which is in contact with the back surface. The grooves 30 are formed at two positions in the upper and lower positions at positions corresponding to the two ring gibels 20 on the front surface of the base plate 22. The groove 30 is cut to the same size as the thickness and length of the wall portion 11 of the ring gibell 20.
In the work, first, the joining fitting 21 is temporarily fixed to the contact surface 28 a of the column 28 so that the ring gibell 20 is inserted into the groove 30. The ring end 20 is inserted and the insertion end 17 is disposed on the back side of the groove 30. Then, in this state, as shown in FIG. 5, the bolt 32 is inserted into each insertion hole 31 from the contact surface 28 a side, and the nut 34 is screwed to the tip thereof via the washer 33.
In this manner, the beam 29 is attached via the joint fitting 21 with the joint fitting 21 attached to the column 28. At the end of the beam 29, a process for fitting the fitting 21 is performed (a joint), and a slit 35 is formed along the longitudinal direction. A second insertion hole 36 is formed orthogonal to the slit 35. The insertion plate 23 is inserted into the slit 35 of the beam 29 by lowering the end side of the beam 29 from above.
At this time, the drift pin 37 is driven into (inserted into) the second insertion hole 36a at the top of the beam 29 in advance. As a result, the drift pin 37 is placed on the pin receiving portion 27 of the insertion plate 23 as the beam 29 is lowered. And since the 2nd insertion hole 36 after the 2nd step | paragraph of the beam 29 is collated with the pin hole 26, alignment is completed automatically. Next, as shown in FIG. 5, the connection is completed by driving the drift pins 37 into the second insertion holes 36 in the second and subsequent stages of the beam 9.

  In the joint structure of the column 28 and the beam 29 using the joint fitting 21 as in the first embodiment, when an external force (shearing force) is applied to the column 28 such that the beam 29 is displaced in the shearing direction due to an earthquake or the like. In this embodiment, a compressive force is applied to the ring gibel 20. However, in the ring gibel 20 of the present embodiment, the wall 11 is largely plastically deformed, and the flange 16 is formed at the insertion end 17. The strength in the compression direction is higher than that of the conventional ring gibber, and as a result, the strength of the joint structure itself is improved as compared with the conventional ring gibber. In addition, since the ring jbell 20 is inserted into the groove 30 of the column 28 and comes into contact with the column 28 inside and outside the ring jbell 20, the shearing force is transmitted to the column 28 also from the inner peripheral side of the ring jbell 20. Thus, when the shearing force is applied, the force is difficult to concentrate and dispersed in a balanced manner.

(Example 2)
2 (a) and 2 (b) show a ring body 19 in which a flange 18 is formed by cutting the bottom 10 and projecting greatly in the above process. FIG. 7 shows a joining metal fitting 41 using the ring body 15 shown in FIGS. In FIG. 7, since the structure of the joining metal fitting 21, the base plate 22, and the insertion plate 23 of the said Example 1 is the same, the same number is attached | subjected and description is abbreviate | omitted. The ring gibell 40 is fixed so that the insertion end 17 side is the front end. The joint fitting 41 is used to join the column 28 and the beam 29 in the same manner as in the first embodiment. However, in the first embodiment, the groove 30 is formed in the column 28 in order to insert the ring gibel 20, but in the second embodiment, the concave portion corresponding to the shape of the ring gibel 40 is formed in the column 28.
Even when the joint fitting 41 as in the second embodiment is used, when an external force (shearing force) is applied to the column 28 in the shearing direction due to an earthquake or the like as in the first embodiment, Although the compression force acts on the ring gibel 40, the wall portion 11 of the ring gibel 40 according to the present embodiment is more plastically deformed than the conventional ring gibel, and the insertion end portion 17 has a flange 18. Therefore, the strength in the compression direction is increased, and as a result, the strength of the bonded structure itself is improved as compared with the conventional structure.

(Example 3)
3 (a) and 3 (b) show a ring gibel 45 formed by welding the ring body 15 shown in FIGS. 1 (a) and 1 (b) back to back so that the insertion end portions 17 face in opposite directions. FIG. 8 shows an example of a joining structure using such a ring jivel 45. In the second embodiment, in the wooden ramen structure assembled in a rectangular shape by the columns 46 and the beams 47, the ring dowels 45 are disposed between the columns 46 and the braces 48 when the braces 48 are disposed obliquely at the connection points. In FIG. 8, only the lower side joined state is shown in a cross section, but the upper side is also joined by a ring dowel 45.
A first concave portion 49 having the same shape is formed on each of the joint surfaces 46 a and 48 a of the pillar 46 and the brace 48. The first recess 49 matches the outer shape of the ring body 15. The column 46 and the brace 48 are each formed with an insertion hole 50 that horizontally communicates the center position of the first recess 49 when the brace 48 is attached. A second recess 51 is formed in a position facing the joint surfaces 46a, 48a of the pillars 46 and the braces 48, where the insertion holes 50 are opened.
The brace 48 is fixed to the column 46 having such a configuration as follows. First, the ring dowel 45 is inserted into the first recess 49 of the column 46 and the brace 48 to temporarily fix the brace 48 in an oblique state. Next, with the washer 52 disposed in the second recess 51, the bolt 53 is inserted into the insertion hole 50 from the column 46 side, and the nut 55 is screwed through the washer 54.
Thus, by using the ring dowel 45 between the pillar 46 and the brace 48, the strength of the joint structure of this portion can be improved as compared with the conventional case.

Example 4
4 (a) to 4 (c) show the ring body 15 shown in FIGS. 1 (a) and 1 (b) and the ring body 19 shown in FIGS. 2 (a) and 2 (b) so that the insertion end 17 side faces opposite directions. It is a ring gibber 55 constructed by welding back to back. 11 (a) and 11 (b) show an example of a joining structure using such a ring gibber 55. FIG. In the fourth embodiment, the column 58 is connected (joined) to the column base metal 57 fixed on the foundation 56 with the ring gibell 55 interposed therebetween. As shown in FIG. 10, the column base metal 57 is composed of a square-shaped receiving plate 60 and a base plate 61, and two leg plates 62 arranged with a space between the receiving plate 60 and the base plate 61. ing. A first through hole 63 for inserting a bolt is formed at the center position of the receiving plate 60. A second through hole 64 is formed at the center position of the base plate 61. As shown in FIGS. 11 (a) and 11 (b), the column base metal 57 is fixed by being fastened by a nut 67 with an anchor bolt 65 embedded in the foundation 56 inserted into the second through hole 64. .
As shown in FIG. 11A, a lag screw bolt 69 is embedded in the lower end surface 57 a of the column 57. As shown in FIGS. 9A and 9B, the lag screw bolt 69 used in the fourth embodiment includes a lag screw portion 69a and a head portion 69b. In the lag screw bolt 69, a female screw portion 69c is formed in the head portion 69b along the longitudinal direction from the end position.
The column 58 is connected to a column base metal 57 fixed on the foundation 56 as follows. A groove 70 corresponding to the shape of the ring jibel 55 is formed around the embedded lag screw bolt 69 on the lower end surface 58 a of the column 58. As shown in FIG. 11A, the insertion end 17 side of the ring gibel 55 on the shallow flange 16 side is inserted into the groove 70 as the tip side. The column 58 in this state is erected on the receiving plate 60 of the column base metal 57, and the bolt 72 is screwed into the female threaded portion 60c of the lag screw bolt 69 through the washer 71 from the first through hole 63 and fastened. To fix.
In this way, by using the ring gibel 55 between the column 58 and the column base metal 57, the strength of the joint structure of this portion can be improved as compared with the conventional case. Further, since the ring gibel 55 is inserted into the groove 70 of the column 58 and comes into contact with the column 58 inside and outside the ring gibel 55, the shearing force is transmitted to the column 58 also from the inner peripheral side of the ring gibel 55. When the shear force is applied, the force is difficult to concentrate and is distributed in a balanced manner.

It should be noted that the present invention can be modified and embodied as follows.
In the punching process of the above embodiment, the drawing process for forming the blank B without fixing the blank B in the hole 2 on the die 1 side is given as an example, but other punching processes, for example, with the blank B fixed The intermediate processed body M may be formed by an overhanging process in which the blank B is stretched and deformed with a punch.
-The joining metal fittings 21 and 41 of the said Example 1 and 2 are an example, and you may make it implement in another aspect. For example, you may make it comprise the number of the ring gibells 20 and 40 in these joining metal fittings 21 and 41 by numbers other than two.
The ring body 19 shown in FIG. 2 may be welded back to back so that the insertion end portions 17 face in opposite directions as shown in FIGS.
In the fourth embodiment, the column 58 is connected (joined) to the column base metal 57 with the ring gibel 55 shown in FIG. 4 interposed therebetween. However, the column 58 is not a column base metal 57 but a wooden structure material. You may make it connect using the ring gibell of this invention when standing up a pillar.
In addition, the present invention can be freely modified and implemented without departing from the spirit of the present invention.

  DESCRIPTION OF SYMBOLS 15, 19 ... Ring body, 17 ... Insertion end part, 30, 70 ... Groove as a recessed part, 28, 46, 58 ... Pillar as a wooden structure material, 29 ... Beam as a wooden structure material, 48 ... As a wooden structure material 57 ... Column base hardware as a structural frame, B ... Blank, M ... Intermediate processed body.

Claims (10)

It disposed at the junction between the coupling part or wood structural members with wooden structural member and the structural framework, embedded to insert the insertion end side of the axial end portion to the wooden structural material surface formed in the recess of the A method of manufacturing a ring body that is arranged and used as a joint fitting together with a bolt member and a nut member,
A cylindrical container shape comprising a bottom part that forms a circular outer periphery from the blank and a cylindrical part that rises from the outer periphery of the bottom by punching by placing a flat blank on the die and pressing the blank into the hole on the die side by punching The intermediate processed body was molded, and the bottom portion of the obtained intermediate processed body was hollowed out so as to leave the meat in a flange-like shape projecting inward and communicated back and forth to form the insertion end portion. A ring body manufacturing method characterized by the above.   The method for manufacturing a ring body according to claim 1, wherein the blank is formed in a circular outer peripheral shape and placed on a die without being fixed when punching.   The ring blank manufacturing method according to claim 2, wherein the blank is punched so that a circular peripheral edge thereof becomes a base end portion of the cylindrical portion of the intermediate workpiece.   The method for manufacturing a ring body according to any one of claims 1 to 3, wherein the intermediate workpiece is formed from the blank by a single punching operation with respect to the hole on the die side when being punched. .   The ring body manufactured by the manufacturing method of the ring body in any one of Claims 1-4.   The ring body according to claim 5, wherein the bottom portion is cut and hollowed out at a position close to the cylindrical portion. A first plate disposed at a connecting portion between the first wooden structure material and the second wooden structure material, and abutting against the first wooden structure material; and formed on a back surface of the first plate, A main body having a second plate to be inserted into a slit formed in the second wood structure material , and the insertion end portion of the ring body according to claim 5 or 6 on the front surface of the first plate. A joint fitting characterized by being fixed by welding so as to face forward.   7. A joint fitting, wherein two ring bodies according to claim 5 or 6 are welded in an axial direction so that the insertion end portions are directed in directions opposite to each other.   The joint fitting according to claim 8, wherein the inner diameters of the two ring bodies on the insertion end side are the same.   The joining metal fitting according to claim 8, wherein inner diameters of the two ring bodies on the insertion end side are different from each other.

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