JP2011052380A - Joint structure for steel material, and nut holding member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint structure for steel materials and a nut holding member, which tighten a bolt and a nut mutually, efficiently and securely and achieve excellent construction performance and economic performance. <P>SOLUTION: This joint structure is constituted by mounting the nut holding member 5 storing the nut 4 arranged while aligning with a bolt hole 11 formed at an end on one side face 1a at the end of each steel material 1, 1 and arranging a joint plate 2 having a bolt hole 12 agreeing with the bolt hole 11 on a side face 1b on the opposite side. The nut holding member 5 has a nut fitting-in part 5a in which the nut 4 is fitted to lock it, and the nut fitting-in part has a locking part 5b for holding the nut 4 in a state for preventing it from coming off. The bolt 3 is inserted while aligning the bolt holes 11, 12 formed in each steel material 1, 1 and the joint plate 2 with a position of the nut 4 and is screwed into the nut 4 to push and widen the locking part 5b when the nut 4 is moved in the direction of a head part of the bolt 3 by screwing-in force and release the state for preventing the nut from coming off for bolt joint. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention belongs to the technical field of fastening work of bolts and nuts that is performed in a groping state that is difficult to be visually confirmed by an operator, and more specifically, the ends of facing steel materials are bolted together via a joint plate. The present invention relates to a steel material joining structure and a nut holding member that are particularly suitable for a steel material joining structure.
In addition, as a typical example of a steel material joining structure in which an operator performs a bolt and nut fastening operation in a groping state, a joining structure of reinforcing ring pieces constituting a reinforcing ring attached to a liner plate can be given. Therefore, hereinafter, the description will focus on the joint structure of the reinforcing ring pieces.

In order to increase the strength of liner plates used for the lining of shafts such as propulsion method shafts, deep foundation method shafts, drainage wells, or horizontal tunnels such as drainage tunnels, the flanges in the circumferential direction of the liner plate are used. In some cases, a reinforcing ring is provided along the line.
Generally, the reinforcing ring is formed by joining a plurality of reinforcing ring pieces formed in an arc shape via a joint plate, and the reinforcing ring piece is preferably made of H-shaped steel, and one flange is connected to the natural ground side. The other side flanges are arranged inside the mine, and are joined to each other manually by a worker inside the mine, and are formed into a closed cross-sectional shape such as a circular shape or an oval shape that matches the cross-sectional shape of the liner plate.
Regarding the joining work of the reinforcing ring pieces constituting the reinforcing ring, the joining work of the flange part of the mine inner side part can be performed without any trouble while confirming visually by the operator, The joining operation of the flange portion is often carried out in a groping state that is difficult to check visually by an operator, which is very troublesome and has left a problem in terms of workability.
By the way, the most difficult part to check visually by the worker is the upper half of the flange (especially the inner side) when the reinforcement ring is made of H-shaped steel. The bolt joining operation of fastening the nut through the bolt is very troublesome, and the worker is most troubled.

Based on the above problems, conventionally, various techniques have been proposed in which the work of joining the flange portion on the ground mountain side of the reinforcing ring piece has been devised as follows.
1) Prior to the work of attaching the reinforcing ring piece to the liner plate, the portion that matches the bolt hole of the ground side flange in advance on the inner surface of the top half of the ground side flange of the reinforcing ring piece (H-shaped steel) A technology that welds a nut or attaches a clip nut.
In addition, although there are different technical fields, there is an invention in which a joining nut fixing jig provided with a nut is previously attached to a steel material by means such as welding (for example, see Patent Document 1).
2) Prior to the work of attaching the reinforcing ring piece to the liner plate, a lock washer is used in advance from the inner side of the upper half of the H-shaped steel ground side flange to the outer side through the bolt through the bolt hole of the flange. Technology to hold the bolt.
3) A hooking portion (12) having an appropriate hook shape that can be hooked to the edge of the H-shaped steel at the upper end of the joint plate (10) for joining the ground-side flange of the H-shaped steel (20). ), And after attaching the H-shaped steel to the liner plate (24), the invention for latching the joint plate to the H-shaped steel using the latching portion (Claims of Patent Document 2 and FIG. 1) (See FIG. 2).
4) The extending portion (58b) of the joint plate (58) is integrally provided on one of the ground-side flanges of the opposing reinforcing ring piece (18) so as to protrude to the other reinforcing ring piece, and the other reinforcing ring An invention in which a fixing member (54) sandwiching the extended portion is provided on one of the natural ground flanges, and the extended portion is positioned between the fixing members, and then the two are connected by a connecting bolt (56) ( (See claims of Patent Document 3 and FIGS. 1 to 6).
5) The right half part (41) of the joint plate mounting part of the ground-side flange (4) of the reinforcing ring (2) is provided with an overhang part (43) projecting downward from the lower end of the lower half part thereof, An invention in which a joint plate (7) is applied to the lower half portion of the natural mountain side flange and the overhang portion, and is fixed with a bolt (8) and a nut (9) (the claims of Patent Document 4 and FIGS. 1 to 7) reference).

Japanese Patent Laid-Open No. 5-280525 Japanese Patent Laid-Open No. 62-288294 JP-A-9-112180 JP 2003-3781 A

In the technology according to 1), a nut is provided in advance on the inner surface of the upper half of the ground mountain side flange, which is the most difficult to work with. It seems that work efficiency can be improved.
However, when a nut is attached by welding, high dimensional accuracy is required, which is very troublesome. In addition, since galvanizing is applied to the H-shaped steel, there is a problem that a screw threading process of the nut is separately required and the cost is increased. It was. In addition, every time a reinforcing ring piece is attached, a work for confirming the position where the nut is provided and adjusting the orientation is newly added.
Further, since the nut is welded and fixed to the reinforcing ring piece, the nut is not moved at all, and the tip of the bolt must be screwed into the nut only by the bolt operation when the bolt is joined. The operation of screwing the tip of the bolt into the nut is easier not only for the bolt operation but also for the nut to move along the axis of the bolt, but in this way the nut is welded to the reinforcing ring piece and does not move at all The groping work that is difficult to visually check is very troublesome.
When using a clip nut, generally, the clip part fixed to the flange is not so high in elasticity that it is easy to come off, and the clip part on the side where the bolt is inserted is inclined. Since the center line of the nut is shifted, there is a problem that alignment is troublesome and tightening is difficult.
Also, clip nuts are very expensive compared to ordinary nuts, and it is not practical to use clip nuts at all necessary locations because of the increased cost.
About invention using the joining nut fixing jig provided with the nut concerning the above-mentioned patent documents 1, if it applies to joining of a reinforcement ring piece, the nut receiving plate 2 between the flange part of a reinforcement ring piece and a nut, or Bolts are joined by interposing a gusset plate 15 (see FIGS. 2 and 11 of the same document 1), and a strong fastening state cannot be maintained, and the nut may loosen due to accumulation of slight vibrations, and may eventually come off. is there. This problem is fatal only to the parts that are difficult to inspect or repair after construction of the liner plate, and is not suitable for joining the reinforcing ring pieces. In addition, since this nut fixing jig is formed by assembling the nut receiving plate 2, the nut fixing plate 3, and the nut pressing member 4 by means such as welding, there is a problem that the number of members is large and the manufacturing cost increases.

The technology related to 2) above is compared with the joining work of the reinforcing ring, which does not give any ingenuity, since the joining work is performed with the bolts temporarily fixed to the inner surface of the upper half of the ground-side flange where the work is most difficult. It seems that the work efficiency at the site can be improved.
However, a total of four bolts to be temporarily fixed are used, at least two at the ends of the reinforcing ring pieces facing each other. However, it is not possible to temporarily fix these bolts in a direction perpendicular to the flange. Have difficulty. Therefore, the work of passing the four bolts through the bolt holes provided in the joint plate after attaching the reinforcing ring piece to the liner plate at once is very troublesome. In some cases, the joint plate hits the tip of the bolt and the bolt slides down as it is. There was a problem that work efficiency deteriorated.

  Although the invention according to Patent Document 2 of 3) above seems to be able to improve the work efficiency in the field, as described in the 5th to 11th lines in the upper right column of the 3rd page of the same document 1. When the latching portion is latched to the flange portion of the H-shaped steel, there is a problem that it is difficult to fasten the bolt and the nut reliably because the flange has a wide width and a gap is generated. Certainly, this problem can be solved by driving the wedge into the gap, but this work must be done in an unreasonable posture, and in addition to the skill of the worker, the wedge is driven above all. There is a hassle to add new work.

  Although the invention according to Patent Document 3 in 4) above can improve the work efficiency at the site, the extending portion (58b) of the joint plate (58) is integrally formed at one end of the commercially available reinforcing ring piece. Since the fixing member (54) sandwiching the extended portion is integrally provided at the other end portion, there is a problem that processing costs and material costs are very high. In addition, every time a reinforcing ring piece is attached, there is a problem in that it is bothersome for the work because the work of confirming the positions of the extended portion (58b) and the fixing member (54) is newly added.

  Although the invention according to Patent Document 4 of 5) above can also improve the work efficiency in the field, since the overhang portion is provided on the commercially available reinforcing ring piece, the processing cost and the material cost are the same as in Patent Document 3. There is a problem that is very bulky.

The object of the present invention is to implement a nut holding member containing a nut to a commercially available steel material, thereby enabling efficient and reliable fastening of bolts and nuts. An object of the present invention is to provide an excellent steel joining structure and nut holding member.
The next object of the present invention is to carry out a configuration in which a nut holding member containing a nut is externally attached to a commercially available reinforcing ring piece. The present invention is also to provide a steel joining structure and a nut holding member that are capable of efficiently and reliably performing a bolt and nut fastening operation and that are excellent in workability and economy.
A further object of the present invention is to improve the fixing property of the bolt and the nut by devising the structure and material of the nut holding member in which the nut is accommodated, and can maintain a firm fastening state permanently, economically, Another object of the present invention is to provide a steel material joining structure and nut holding member with excellent quality.

As a means for solving the above-mentioned background art, the steel material joining structure according to the invention described in claim 1 is a steel material joint in which end portions of facing steel materials are bolted via a joint plate. Structure,
A nut holding member containing a nut is attached to one side surface of each steel material in an arrangement that matches the bolt hole provided in the same end, and the same side as the bolt hole on the opposite side surface of the steel material end. A joint plate having bolt holes to be placed,
The nut holding member is provided with a nut fitting portion into which the nut is fitted in a non-rotating state, and the nut fitting portion has a locking portion that holds the fitted nut in a state that prevents the nut from coming off so as not to come off. Has
The bolt holes provided in each steel material and the joint plate and the nuts of the nut holding member are aligned and the bolt is inserted from the outside of the joint plate and screwed into the nut of the nut holding member. When the head is moved in the head direction, the locking portion is expanded to release the slip-off prevention state and are bolted.

  The invention described in claim 2 is a steel ring joint structure according to claim 1, wherein the steel material is a reinforcing ring piece formed of a shape steel in which a flange is disposed on a natural ground side and a pit inner side of a liner plate, The nut holding member is attached to the inner side surface of the end of the flange arranged on the ground side of the reinforcing ring piece in an arrangement that matches the bolt hole provided in the end, and each of the nut holding members is attached. Reinforcing ring pieces are provided on the liner plate so that the flanges are arranged on the natural ground side and the inside of the shaft, the ends of adjacent reinforcing ring pieces face each other, and bolted via the joint plate to form the reinforcing ring. It is formed.

  According to a third aspect of the present invention, in the steel material joining structure according to the first or second aspect, the nut fitting portion of the nut holding member is formed to be slightly larger than the outer diameter of the nut and is fitted into the nut fitting portion. The nut is characterized by being held loosely enough not to rotate in the nut fitting portion.

  According to a fourth aspect of the present invention, in the steel material joining structure according to the second or third aspect, the shape steel forming the reinforcing ring piece is an H-shaped steel, and the nut holding member is a ground of the reinforcing ring piece. It is attached to the inner surface of the upper half part of the flange arranged on the mountain side.

  According to a fifth aspect of the present invention, in the steel material joining structure according to any one of the second to fourth aspects, the nut holding member is hung on the upper end of the flange on the ground mountain side of the reinforcing ring piece. The latching part which stops is provided, It is characterized by the above-mentioned.

  According to a sixth aspect of the present invention, in the steel material joining structure according to any one of the second to fourth aspects, the nut holding member is formed by a flange on the ground side of the reinforcing ring piece and bolting or screwing. It is attached.

  According to a seventh aspect of the present invention, in the steel material joining structure according to any one of the second to sixth aspects, the joint plate is rotatable in advance to one of the flanges of the adjacent reinforcing ring pieces. It is characterized by being bolted or screwed.

  The invention described in claim 8 is characterized in that, in the steel material joining structure according to any one of claims 1 to 7, a washer is housed together with a nut in a nut fitting portion of the nut holding member. To do.

  The invention described in claim 9 is characterized in that, in the steel joint structure according to any one of claims 1 to 8, the nut holding member is made of resin.

The nut holding member according to the invention described in claim 10 is a nut holding member that holds the nut in a non-rotating state and is used when bolting a steel material having a bolt hole.
The nut holding member is provided with a nut fitting portion into which the nut is fitted in a non-rotating state, and the nut fitting portion has a locking portion that holds the fitted nut in a state that prevents the nut from coming off so as not to come off. With
Pass the bolt through the bolt hole of the steel material, screw the tip of the bolt into the nut of the nut holding member, and when the nut moves toward the head of the bolt due to the screwing force, the locking portion is expanded. Further, the disconnection prevention state is released.

  According to an eleventh aspect of the present invention, in the nut holding member according to the tenth aspect, the nut fitting portion of the nut holding member is formed slightly larger than the outer diameter of the nut, and the nut fitted into the nut fitting portion is It is characterized by being held loosely enough not to rotate in the nut fitting portion.

  According to a twelfth aspect of the present invention, in the nut holding member according to the tenth or eleventh aspect, a washer is housed in the nut fitting portion of the nut holding member together with the nut.

  The invention described in claim 13 is the nut holding member according to any one of claims 10 to 12, wherein the nut holding member is made of resin.

The steel material joint structure and nut holding member according to the present invention have the following effects.
I) By attaching a nut holding member containing the nut in advance to the part where the nut is attached, it is possible to realize the labor saving of the joining work by that amount. Even when a bolt and nut fastening operation is performed, a smooth and satisfactory bolt and nut joining operation can be performed by attaching a nut holding member in which the nut is stored in advance to the portion.
II) The nut fitting part formed on the nut holding member is formed slightly larger than the outer diameter of the nut, and the nut fitted in the nut fitting part is held so loose that it does not turn in the nut fitting part. is doing. Therefore, by giving the nut some play, the bolt to be fastened to the nut can be operated with the core slightly swaying against the nut to find the screw end of the nut, and the screwing operation can be easily advanced. Even when the bolt and nut are fastened in a groping state that is difficult for an operator to visually confirm, a smooth and good bolt joining operation can be performed.
III) The locking portion provided in the nut fitting portion is implemented with a shape or material that can be elastically deformed. Therefore, when the bolt is screwed into the nut during the bolt joining process, the nut moves toward the flange side of the reinforcing ring piece due to the same screwing force, and the locking part is expanded to release the slip-off prevention state. By continuing the operation, the nut is brought into close contact with the flange of the reinforcing ring piece, and the bolt can be firmly tightened.
IV) In short, the steel joining structure and the nut holding member according to the present invention are used when the bolt and nut are tightened in a groping state that is difficult for an operator to visually confirm by using the nut holding member having the above-described configuration. Even in such a case, it is possible to perform a smooth and satisfactory bolt joining operation, as well as to improve the fixing property of the bolt and the nut, and to maintain a firm fastening state permanently. Therefore, it can implement suitably for the joint operation | work on the natural ground side of the site | part to which the inspection after a construction or repair is difficult, for example, the reinforcement ring piece arrange | positioned in a liner plate.

It is the elevation which showed the junction structure of the reinforcement ring piece (steel material) concerning Example 1. FIG. 3 is a plan view illustrating a joining structure of reinforcing ring pieces according to the first embodiment. FIG. 3 is an exploded perspective view of FIG. 2. A is the perspective view which showed the nut holding member used for the joining structure of the reinforcement ring piece which concerns on Example 1, B is the same front view. A and B are flat cross-sectional views showing in a stepwise manner the joining state of nuts and bolts housed in a nut holding member. A is a sectional side view showing a different embodiment of the nut holding member, and B is a plan view of the same. A is the front view which showed the step which attaches a nut holding member to the inner surface of the upper half part of the flange of the ground ring side of a reinforcement ring piece in implementing the joining structure of the reinforcement ring piece which concerns on Example 1, B FIG. A is the front view which showed the step which attaches a joint board to the outer surface of the flange of the natural mountain side of a reinforcement ring piece, and B is the same side view. A is the front view which showed the step which joins a volt | bolt to the upper half part of the flange by the side of the natural ground of a reinforcement ring piece, B is the same side view. It is the elevation which showed the variation of the joining structure of the reinforcement ring piece which relates to execution example 1. It is the elevation which showed the variation of the joining structure of the reinforcement ring piece which relates to execution example 1. It is the elevation which showed the joining structure of the reinforcement ring piece which concerns on Example 2. FIG. It is the disassembled perspective view which showed the joining structure of the reinforcement ring piece which concerns on Example 2. FIG. A is the perspective view which showed the nut holding member used for the joining structure of the reinforcement ring piece which concerns on Example 2, B is the front view.

The joining structure of steel materials according to the present invention is a joining structure of steel materials 1 and 1 in which end portions of facing steel materials 1 and 1 are joined with bolts 3 via a joint plate 2. A nut holding member 5 containing a nut 4 is attached to one side surface 1a of the end portion of the steel material 1 in an arrangement that matches the bolt hole 11 provided at the end portion, and on the side surface 1b opposite to the end portion of the steel material 1, A joint plate 2 having a bolt hole 12 coinciding with the bolt hole 11 is disposed (see FIGS. 1 to 3).
The nut holding member 5 is provided with a nut fitting portion 5a into which the nut 4 is fitted in a non-rotating state, and the nut fitting portion 5a is held in a state that prevents the fitted nut 4 from coming off and preventing it from coming off. A locking portion 5b is provided (see FIGS. 4A and 4B).
Bolts 3 are inserted from the outside of the joint plate 2 by aligning the positions of the bolt holes 11, 12 provided in the steel members 1, 1 and the joint plate 2 and the nut 4 of the nut holding member 5, and the nut of the nut holding member 5 4 and when the nut 4 moves toward the head of the bolt 3 by the same screwing force, the nut 4 spreads the locking portion 5b, the release prevention state is released, and the bolt 3 joins. (See FIGS. 5A and 5B).

In addition, the joining structure of steel materials according to the present invention can be applied to all techniques for bolting the ends of facing steel materials via a joint plate. By attaching the nut holding member 5 containing the nut 4 in advance to the part to which the nut is attached, there is an effect that the labor saving of the joining work can be realized by that amount.
Moreover, the joining structure of the steel materials according to the present invention is such that when joining the end portions of the steel materials 1 and 1 facing each other using the flange portions of steel materials such as H-shaped steel, channel steel, and angle steel, liner plates are used. 10, installing a corrugated pipe, a steel pipe column or the like in the web portion is particularly suitable when the bolt 3 and the nut 4 are fastened in a groping state that is difficult for an operator to visually confirm. This is because by attaching the nut holding member 5 in which the nut 4 is placed in advance to the part, it is possible to perform a smooth and satisfactory joining operation between the bolt and the nut.

The nut holding member according to the present invention can be applied not only to the general technique of bolting the end portions of the steel materials 1 and 1 facing each other via the joint plate 2 but also to a closed space such as the inside of a tubular steel material. The present invention can also be applied to holding the nut by changing the form as appropriate (for example, see Japanese Patent Application No. 2009-188841 filed earlier by the present applicant).
Further, the nut holding member according to the present invention is actually stealed as appropriate in order to save material. This meat stealing can be carried out to such an extent that the nut 4 is strong enough to hold it in a non-rotating state.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a steel material joining structure according to the present invention and nut holding members used in the joining structure will be described with reference to the drawings. By the way, in this embodiment, an arc-shaped reinforcing ring piece 1 is adopted as the steel material 1, and a steel material joining structure that forms a reinforcing ring by joining a plurality of reinforcing ring pieces 1 along the circumferential flange 10a of the liner plate 10 is used. Will be described. The significance of adopting the reinforcing ring piece 1 as the steel material 1 is that when the reinforcing ring piece 1 is joined, there are many work that is performed in a groping state that is difficult for an operator to visually confirm, and the effects of the present invention are clearly shown. Because.
However, it should be mentioned in advance that the steel material used in the present invention is not limited to the reinforcing ring piece 1 and can be applied to the tubular steel material described above.

FIGS. 1-9 has shown Example 1 of the joining structure of the reinforcement ring piece 1 which concerns on this invention.
In the joining structure according to the first embodiment, as shown in FIGS. 1 to 3, the end portions of the reinforcing ring pieces 1 and 1 facing each other are joined with a bolt 4 via a joint plate 2. It is the structure which is made, and the arrangement | positioning which corresponds to the bolt hole 11 provided in the end part on the inner surface 1a of the upper half part of the flange arrange | positioned to the natural ground 13 side of the edge part of each reinforcement ring piece 1 and 1 is carried out. A nut holding member 5 containing a nut 4 is attached, and a joint plate 2 having a bolt hole 12 coinciding with the bolt hole 11 is disposed on the outer surface 1b of the flange.
As shown in FIGS. 4A and 4B, the nut holding member 5 is provided with a nut fitting part 5a into which the nut 4 is fitted in a non-rotating state. There is provided a locking portion 5b that holds it in a state that prevents it from coming off.
The bolt 3 is inserted from the outside of the joint plate 2 by aligning the positions of the bolt holes 11 and 12 provided in the reinforcing ring pieces 1 and 1 and the joint plate 2 and the nut 4 of the nut holding member 5, and the nut holding member 5. 5A and B, when the nut 4 moves toward the head of the bolt 3 by the same screwing force, the locking portion 5b is expanded and pulled out. The detachment prevention state is released and the bolts 3 are joined.
Incidentally, reference numeral 20 in FIGS. 1 to 3 denotes bolt holes provided in the web portion of the reinforcing ring piece 1 at substantially equal intervals. The bolt hole 20 is provided for joining the reinforcing ring piece 1 with the circumferential flange 10 a of the liner plate 10 and the bolt 21.

  The nut holding member 5 containing the nut 4 is an upper half portion of the flange disposed on the ground ring 13 side of the reinforcing ring 1, which is forced to fasten the bolt and the nut in a groping state that is difficult for an operator to visually confirm. Only the inner side surface 1b is attached in advance. Since the joining work of the flange portion of the other reinforcing ring 1 can be reliably performed without any trouble while visually confirmed by an operator, the fastening work of the bolt 3 and the nut 4 can be performed without using the nut holding member 5. Do. In addition, about the attachment arrangement | positioning of the said volt | bolt 3 and the nut 4, the site | part fastened without using the said nut holding member 5 is not limited to the example of illustration.

The reinforcing ring piece 1 is a steel material in which a steel bar (H-shaped steel in the illustrated example) in which the flanges are arranged on the ground 13 side and the underground shaft 14 side is formed in an arc shape, and extends along the circumferential flange at the lower end of the liner plate 10. A plurality (usually 4 or more) of the arrangements are faced and joined to form a reinforcing ring.
By the way, the cross-sectional dimension of the H-section steel of the reinforcing ring piece 1 according to the illustrated example is 125 (height) × 125 (width) × 6.5 (web thickness) × 9 (flange thickness) (unit: mm) Has been.
The shape steel used for the reinforcing ring piece 1 is not limited to the H-shape steel, and can be similarly applied to the channel steel 19a (see FIG. 10) and the angle steel 19b (see FIG. 11).
Although part of the reinforcing ring is omitted for the sake of illustration, the four reinforcing ring pieces 1 having a circular arc shape are used, and the ends of the adjacent reinforcing ring pieces 1 and 1 face each other to form a ring shape. It is carried out. The number, shape, and cross-sectional dimensions of the reinforcing ring pieces 1 constituting the reinforcing ring are not limited to the illustrated examples, and the scale and shape of the reinforcing ring and consequently the liner plate 10 to be constructed (circular, oval, rectangular). Of course, the design may be changed as appropriate.
Incidentally, in the illustrated example, the adjacent reinforcing ring pieces 1 and 1 are abutted and joined so that the end portions of the reinforcing ring pieces 1 and 1 come into contact with each other. However, the present invention is not limited to this. You can also.

The joint plates 2 are arranged on the flanges on the natural ground side and the flanges on the inner side of the end portions of the reinforcing ring pieces 1 and 1 facing each other.
The joint plate 2 is made of metal, and is formed into a curvature matching the shape of the flange of the reinforcing ring piece 1 formed in an arc shape, and bolt holes 11 provided at the ends of the reinforcing ring pieces 1 and 1 facing each other. The bolt holes 12 provided in the joint plate 2 are attached so as to substantially evenly straddle the end portions.
The dimensions of the joint plate 2 according to the illustrated example are 125 (height) × 12 (thickness) × 310 (width) (unit: mm).
Further, the bolt holes 12 provided in the joint plate 2 are implemented with the same number and arrangement as the bolt holes 11 provided on the reinforcing ring pieces 1 and 1 side. Specifically, the bolt hole 12 in the illustrated example has an elliptical shape slightly larger than the bolt hole 11 provided on the reinforcing ring piece 1 side, and is provided concentrically with the bolt hole 11 so that the bolt 3 can be easily inserted. ing.
Of course, the form of the joint plate 2 and the number and arrangement of the bolt holes 12 provided in the joint plate 2 are not limited to the illustrated example. The form of the reinforcing ring piece 1 to be used and the bolt hole 11 provided in the reinforcing ring piece. The design is appropriately changed according to the number and arrangement of

The nut holding member 5 is formed in a flat plate shape having a thickness capable of accommodating a nut, and is formed on the upper half portion of the flange disposed on the ground mountain 13 side of the end portions of the reinforcing ring pieces 1 and 1 facing each other. Each is attached to the inner surface 1a.
Similar to the joint plate 2, the nut holding member 5 is formed into a curvature that matches the shape of the flange of the reinforcing ring piece 1 formed in an arc shape, and the bolt holding hole 11 provided at the end of the reinforcing ring piece 1 The nut 3 housed in the nut holding member 5 is attached so as to be concentrically arranged.
As a means for attaching the nut holding member 5 to the reinforcing ring piece 1, the nut holding member 5 according to the first embodiment can be hooked on the upper end of the flange on the ground mountain side of the reinforcing ring piece 1. The shape of the latching portion 6 is provided in two places on the left and right sides in a well-balanced manner. The latching portion 6 is latched on the flange by a frictional force or an elastic force that does not move even if some vibration or the like occurs. In addition, the form of the latching part 6 is not limited to the example of illustration, What is necessary is just a form which can latch the said nut holding member 5 to the reinforcement ring piece 1 in the stable state. Moreover, the type which attaches and attaches to the nut holding member 5 main body may be sufficient.
Incidentally, the nut holding member 5 is suitable for mass production, inexpensive, lightweight and easy to handle, thermosetting or thermoplastic synthetic resin such as phenol resin, epoxy resin, melanin resin, unsaturated polyester. Resin, polyurethane resin, or the like can be used as a raw material. Further, it can be carried out by molding with low / medium foam or high foam polystyrene resin or polypropylene resin, or it can be carried out as a non-foamed synthetic resin. Moreover, the nut holding member 5 can also be implemented using a metal.

  In the nut holding member 5, nut fitting portions 5 a into which the nut 4 is fitted in a non-rotating state are provided at a position corresponding to the bolt hole 11 provided on the reinforcing ring piece 1 side in a balanced manner at two locations on the left and right. ing. The nut fitting portion 5a includes a locking portion 5b that holds the fitted nut 5 so as not to come off.

The nut fitting part 5a is formed in a hexagon slightly larger than the outer diameter of the nut 4 (hexagonal in the illustrated example), and the nut 4 fitted into the nut fitting part 5a does not rotate in the nut fitting part 5a. It is held loose to the extent. In this way, by giving the nut 4 some play, the bolt 3 to be fastened with the nut 4 is operated in a state where the nut 4 is slightly displaced with respect to the nut 4, and the start end of the screw of the nut 4 is found. The screwing operation can be easily performed, and a smooth and satisfactory bolt joining operation can be performed.
When the nut holding member 5 is attached to the reinforcing ring piece 1, the locking portion 5b has an effect of preventing the nut 4 fitted in the nut fitting portion 5a from falling off.
The nut fitting portion 5a keeps the vertical posture without detaching the nut 4 fitted during the work of attaching to the reinforcing ring piece 1 due to the hooking effect of the locking portion 5b, and rotates together when the bolt 3 is fastened. It is necessary to form in a shape that does not. Therefore, as shown in FIGS. 5A and 5B, the nut fitting portion 5a according to the present embodiment is formed by forming a through hole with a stepped portion 7 for positioning the nut 3 in the horizontal direction. The through hole is formed in a hexagonal cylindrical shape from the inlet of the nut fitting portion 5a to the step portion 7, and is formed in a cylindrical shape larger than the outer diameter of the bolt 3 from the step portion 7 to the outlet. .
The reason why the nut fitting portion 5a is formed in the penetrating form is that the manufacturing cost can be reduced and the weight can be reduced by reducing the amount of material used, and if the nut 4 once fitted has a problem. In addition, there is an advantage that it can be easily removed by slightly pushing the locking portion 5b and pushing it with the fingers of the operator from the rear through hole. A variation of the nut holding member 5 in consideration of this point is shown in FIG. The nut holding member 15 according to FIG. 6 is provided with a nut insertion hole 15a penetrating vertically upward from a position where the nut 4 is fitted, in addition to the through hole. By carrying out in such a form, the manufacturing cost can be further reduced and the weight can be reduced, and the nut 4 can be easily slid in and out.

The locking portion 5b is a portion that is slightly advanced from the entrance of the nut fitting portion 5a in the depth direction, and is formed into a shape that can be elastically deformed at the center of one side of the hexagon (vertical side in the illustrated example). Is provided. In short, the nut 4 fitted into the nut fitting portion 5a is pushed out of the locking portion 5b and immediately inserted into the nut fitting portion 5a, so that the locking portion 5b returns to its original position, so that the nut 4 comes off. Can be prevented.
When the nut 4 is fitted into the nut fitting portion 5a having the locking portion 5b having such a configuration, the nut 4 is sandwiched between the stepped portion 7 and the locking portion 5b and maintains a vertical posture, and is substantially horizontal. It is possible to perform screwing work accurately and quickly including alignment (search or alignment of the screw start end) with the bolt 3 inserted from the direction, and smooth and good bolt joining work can be performed.
Further, when the bolt 3 is screwed into the nut 4 in the process of the bolt joining operation, as shown in steps in FIGS. 5A and 5B, the nut 4 moves toward the flange side of the reinforcing ring piece 1 due to the screwing force, When the locking portion 5b is expanded to release the slip-off prevention state, and the bolt 3 is continuously screwed in, the nut 4 is brought into close contact with the flange of the reinforcing ring piece 1 and can be firmly tightened.

  Needless to say, the nut fitting portion 5 a of the nut holding member 5 can be implemented in a shape that can accommodate the washer together with the nut 4. In this case, the washer is fitted into the outer peripheral surface of the nut 4 so as to be closely attached, and is latched by the locking portion 5b so that the washer does not come off.

Next, the construction procedure of the joining structure of the above-described reinforcing ring piece (steel material) 1 will be described.
First, as shown in FIGS. 7A and 7B, the reinforcing ring piece 1 has a joining structure in which two reinforcing ring pieces 1, 1 that are face-to-face joined before attaching the reinforcing ring piece 1 to the liner plate 10. A nut holding member 5 containing the nut 4 is attached to each of the end portions by hooking a latching portion 6 provided at the upper end portion thereof on the upper end of the flange of the reinforcing ring piece 1 and a bolt hole provided in the flange portion. 11 and the nut 4 fitted in the nut holding member 5 are aligned.
This operation is performed on the ground or in the mine of the liner plate 10.
The said nut holding member 5 is specifically attached to the inner surface 1a of the upper half part of the flange arrange | positioned at the natural ground 13 side of the edge part of each reinforcement ring piece 1. FIG.

Next, as shown in FIGS. 8A and 8B, the two reinforcing ring pieces 1 to which the nut holding member 5 is attached face each other along the circumferential flange 10 a at the lower end portion of the existing liner plate 10. ) Install. Specifically, the flange on the side where the nut holding member 5 of each reinforcing ring piece 1 is provided is arranged on the ground mountain side, and is provided in the bolt hole 20 provided in the web of each reinforcing ring piece 1 and the circumferential flange 10a. The bolt holes 10b are matched, and the nuts 22 are screwed into the bolt holes 20 and 10b that match with each other and attached.
The nut holding member 5 is configured so that the latching portion 6 does not slide even if some vibration or the like occurs, so that the flange ring is attached to the flange until the reinforcing ring piece 1 is attached to the liner plate. There is no misalignment between the provided bolt hole 11 and the nut 4 fitted into the nut holding member 5.
In this way, after the positioning operation for facing the reinforcing ring pieces 1 and 1 is completed, the joint plate 2 is attached to the reinforcing ring pieces 1 and 1 on the outer surface of the ground-side flange of the reinforcing ring pieces 1 and 1. The bolt holes 11 provided in the flange on the ground mountain side of the reinforcing ring piece 1 and the bolt holes 12 provided in the joint plate 2 are positioned so as to be concentric with each other.
When the joint plate 2 is temporarily fixed to one of the flanges of the adjacent reinforcing ring pieces 1 and 1 with a bolt or the like before the reinforcing ring 1 is attached to the liner plate 10, the positioning work can be easily advanced. be able to.

Subsequently, as shown in FIGS. 9A and 9B, the bolting operation of the upper half portion of the flange on the natural ground side of the reinforcing ring piece is performed.
Since the nut 4 is previously attached by the nut holding member 5 in the bolt tightening operation of this part, an operator who is forced to work in a groping state can perform the bolt tightening operation only by operating the bolt 3. . Moreover, since the bolt holes 12 provided in the joint plate 2 are formed in a wide oval shape, the tip of the bolt 3 can be easily guided to the bolt holes 11 of the reinforcing ring piece 1. The bolt 3 that has passed through the bolt holes 12 and 11 is held so loosely that the nut 4 does not rotate together with the nut holding member 5. The start end of the screw 4 can be located and the screwing operation can be easily advanced, and a smooth and good bolt joining operation can be carried out.
In addition, when the bolt 3 is screwed into the nut 4 in the process of the bolt joining operation, as shown in steps in FIGS. 5A and 5B, the nut 4 moves toward the flange side of the reinforcing ring piece 1 due to the screwing force, When the locking portion 5b is expanded to release the slip-off prevention state, and the bolt 3 is continuously screwed in, the nut 3 is brought into close contact with the flange of the reinforcing ring piece 1 and can be firmly tightened. When the washer is fitted into the nut fitting portion 5a of the nut holding member 5 together with the nut 4, the bolt can be tightened more firmly.

  After the bolt 3 is firmly screwed into all the nuts 4 held by the nut holding member 5, the lower half of the flange on the natural ground side is joined with the bolt, and the upper half of the flange on the inner side of the well and Perform bolting work for the lower half. In addition, before starting the bolt joining work on the natural ground side, the bolt joining work on the inner side of the well may be completed. Incidentally, reference numeral 8 in FIG. 9A denotes a washer.

  Thus, the joint plates 2 and 2 are bolted to both flanges of the reinforcing ring pieces 1 and 1, and the work of joining the reinforcing ring pieces 1 and 1 facing each other is performed along the circumferential flange of the liner plate 10. By repeating as many times as necessary, the reinforcing ring can be formed. After forming the reinforcing ring, a part of the plurality of bolts 21 attached to the reinforcing ring piece 1 is once removed, and a liner plate (not shown) is arranged on the lower side, and then the bolt 21 is attached again.

According to the nut holding member 5 used for the steel material (reinforcing ring piece) joining structure and the joining structure described above, by attaching the nut holding member 5 containing the nut 4 in advance to the part to which the nut 4 is attached, Of course, it is possible to realize the labor saving of the joining work as much as that, even if there is a portion where it is necessary to perform the fastening work of the bolt 3 and the nut 4 in a groping state that is difficult for an operator to visually confirm, By attaching the nut holding member 5 in which the nut 4 is housed in advance to the part, it is possible to perform a smooth and satisfactory joining operation between the bolt and the nut.
Further, the nut fitting portion 5a is formed to be slightly larger than the outer diameter of the nut 4, and the nut 4 fitted into the nut fitting portion 5a is held loosely to the extent that it does not rotate in the nut fitting portion 5a. Therefore, by giving the nut 4 some play, the bolt 3 to be fastened with the nut 4 is operated in a state where the nut 4 is slightly displaced with respect to the nut 4 to find the start end of the screw of the nut 4 and screwing operation Therefore, even when the bolt and nut are fastened in a groping state that is difficult for an operator to visually confirm, the bolt can be smoothly and satisfactorily joined.
Furthermore, by engaging the locking portion 5b provided on the nut fitting portion 5a with an elastically deformable shape or material, when the bolt 3 is screwed into the nut 4 during the bolt joining operation, The nut 4 is moved toward the flange side of the reinforcing ring piece 1, and the locking portion 5 b is pushed and widened to release the detachment prevention state. By continuing to screw the bolt 3 as it is, the nut 3 becomes the flange of the reinforcing ring piece 1. Adheres closely and can be tightened firmly.

FIGS. 12-14 has shown Example 2 of the joining structure of the reinforcement ring piece 1 which concerns on this invention.
The second embodiment is mainly different from the first embodiment in the form of the nut holding member 5. Since the reinforcing ring piece 1, the joint plate 2 and other constituent members are the same as those in the first embodiment, the same reference numerals are given and the description thereof is omitted as appropriate.
The nut holding member 9 according to the second embodiment is different from the nut holding member 5 according to the first embodiment in that the nut holding member 5 is implemented in a latching manner, whereas the nut retaining member 5 is implemented in a screwing manner. The nut holding member 9 has a flat plate shape that is longer in the lateral direction than the nut holding member 5 in order to form a screwing portion.
Specifically, the nut holding member 9 has a bolt hole 9a formed at one end thereof matched with the bolt hole 16 provided in the upper half of the flange on the ground ring side of the reinforcing ring piece 1, and the matched bolt hole Bolts 17 are passed through 9a and 16 and nuts 18 are screwed in to attach to the inner side surface 1a of the upper half of the flange. This operation is performed before the reinforcing ring piece 1 is disposed on the liner plate 10.
The joining work between the liner plate 10 and the reinforcing ring piece 1 and the joining work between the facing reinforcing ring pieces 1 and 1 and the joint plates 2 and 2 after the nut holding member 9 is attached to the reinforcing ring piece 1 are as follows. The same procedure as in Example 1 is performed.

Therefore, since the joining structure of the reinforcing ring piece 1 according to the second embodiment is different from the first embodiment only in the method of attaching the nut holding member 9 (5) to the reinforcing ring piece 1, the above embodiment is different. 1 has the same effect (see paragraph [0039]).
In addition, fixing of the nut holding member 9 according to the second embodiment to the reinforcing ring piece 1 is a screw-in type, and the latching portion 6 is not necessary like the nut holding member 5 according to the first embodiment. Therefore, since the flange on the ground mountain side of the reinforcing ring piece 1 and the joint plate 2 can be brought into close contact with each other and bolted, the bolt can be joined more firmly than in the first embodiment.

  Although the embodiments have been described with reference to the drawings, the present invention is not limited to the illustrated examples and includes a range of design changes and application variations that are usually made by those skilled in the art without departing from the technical idea thereof. I will mention that just in case.

1 Reinforcing ring piece (steel)
DESCRIPTION OF SYMBOLS 1a Inner side surface of natural ground side flange 1b Inner side surface of natural ground side flange 2 Joint plate 3 Bolt 4 Nut 5 Nut holding member 5a Nut fitting part 5b Locking part 6 Latching part 7 Step part 8 Washer 9 Nut holding member 9a Bolt hole 10 Liner plate 10a Bolt hole 11 Bolt hole 12 Bolt hole 13 Ground 14 Mine 15 Nut holding member 15a Nut through hole 16 Bolt hole 17 Bolt 18 Nut 19a Reinforcement ring piece 19b Reinforcement ring piece 20 Bolt hole 21 Bolt

Claims (13)

The end part of the steel materials facing each other is a steel material joining structure that is bolted via a joint plate,
A nut holding member containing a nut is attached to one side surface of each steel material in an arrangement that matches the bolt hole provided in the same end, and the same side as the bolt hole on the opposite side surface of the steel material end. A joint plate having bolt holes to be placed,
The nut holding member is provided with a nut fitting portion into which the nut is fitted in a non-rotating state, and the nut fitting portion has a locking portion that holds the fitted nut in a state that prevents the nut from coming off so as not to come off. Has
The bolt holes provided in each steel material and the joint plate and the nuts of the nut holding member are aligned and the bolt is inserted from the outside of the joint plate and screwed into the nut of the nut holding member. When moving in the direction of the head of the steel, the joining portion of the steel material is characterized in that the engaging portion is expanded to be bolted and the detachment prevention state is released and bolted.   The steel material is a reinforcing ring piece formed of a shape steel in which a flange is disposed on the natural ground side of the liner plate and on the inner side of the liner plate, and the same end portion is provided on the inner surface of the end of the flange disposed on the natural ground side of each reinforcing ring piece. The nut holding member is attached in an arrangement that matches the bolt hole provided in the liner plate, and each reinforcing ring piece to which the nut holding member is attached is attached to the liner plate so that the flange is placed on the ground side and the inside of the shaft. 2. The steel material joining structure according to claim 1, wherein end portions of adjacent reinforcing ring pieces are faced to each other and bolted through the joint plate to form a reinforcing ring. 3.   The nut fitting portion of the nut holding member is formed to be slightly larger than the outer diameter of the nut, and the nut fitted into the nut fitting portion is held loosely enough not to rotate in the nut fitting portion. The steel material joint structure according to claim 1 or 2.   The section steel forming the reinforcing ring piece is an H-section steel, and the nut holding member is attached to an inner surface of an upper half portion of a flange disposed on the ground side of the reinforcing ring piece. 2. A steel joint structure according to 2 or 3.   The said nut holding member is provided with the latching part latched on the upper end of the flange of the ground ring side of the said reinforcement ring piece at the upper end part, It described in any one of Claims 2-4 characterized by the above-mentioned. Steel joint structure.   The steel material joining structure according to any one of claims 2 to 4, wherein the nut holding member is attached to a ground-side flange of the reinforcing ring piece by bolting or screwing.   The said joint board is bolted or screwed to either one flange of the adjacent reinforcement ring piece beforehand so that rotation is possible, It was described in any one of Claims 2-6 characterized by the above-mentioned. Steel joint structure.   The steel fitting joint structure according to any one of claims 1 to 7, wherein a washer is housed together with a nut in a nut fitting portion of the nut holding member.   The said nut holding member is resin, The joining structure of the steel materials as described in any one of Claims 1-8 characterized by the above-mentioned. A nut holding member for holding a nut in a non-rotating state, which is used when bolting a steel material having a bolt hole,
The nut holding member is provided with a nut fitting portion into which the nut is fitted in a non-rotating state, and the nut fitting portion has a locking portion that holds the fitted nut in a state that prevents the nut from coming off so as not to come off. Has
Pass the bolt through the bolt hole of the steel material, screw the tip of the bolt into the nut of the nut holding member, and when the nut moves toward the head of the bolt due to the screwing force, the locking portion is expanded. The nut holding member is released from the detachment prevention state.   The nut fitting portion of the nut holding member is formed to be slightly larger than the outer diameter of the nut, and the nut fitted into the nut fitting portion is held loosely enough not to rotate in the nut fitting portion. The nut holding member according to claim 10.   The nut holding member according to claim 10 or 11, wherein a washer is housed together with the nut in a nut fitting portion of the nut holding member.   The nut holding member according to any one of claims 10 to 12, wherein the nut holding member is made of resin.

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