JP2010065401A - Bolt/nut tightening tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem with a conventional bolt/nut tightening tool wherein earth side bolts and nuts for tightening a joint plate and an H-steel which form a reinforcement ring must be tightened by trial and error when a shaft is formed of a liner plate and the reinforcement ring, and the bolt and nut tightening operation is very troublesome and dangerous. <P>SOLUTION: The rotating part of a rotary tool is coaxial to the guide shaft part thereof. Each bolt hole formed in each flange of the H-steel which forms the reinforcement ring is coaxial to each of the earth side flange and the anti-earth side flange. When the guide shaft part is inserted into the bolt hole of the anti-earth side flange of the H-steel of the reinforcement ring, the bolt or the nut inserted into the rotating part of the rotary tool is coaxial to the bolt hole of the earth side flange. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bolt used when fastening a bolt and nut for connecting a H-shaped steel forming a reinforcing ring and a joint plate from a natural ground side in an operation of forming a shaft in the soil using a liner plate and a reinforcing ring. -It relates to a nut fastening tool.

  As the earth retaining of the shaft formed in the soil, for example, as shown in FIG. 10, a plurality of liner plates 10 curved in an arc shape (the earth retaining material in which a thin steel plate is corrugated and a flange is formed around it). Are connected in a ring shape and are continuously connected in a cylindrical shape in the vertical direction.

  Drill a hole slightly larger than the diameter of the shaft that formed the liner plate in a ring shape, assemble the liner plate inside the hole in a ring shape, repeat the drilling and connecting the ring shaped liner plate in the direction of the bottom of the hole, Build a shaft with a predetermined depth.

  Since earth pressure is applied to such a shaft from the natural ground side, the earth pressure increases depending on the depth. Therefore, the liner plate 10 alone is insufficient in strength, and there are places for reinforcement between the rings of the liner plate 10. A reinforcing ring 12 is inserted. Since the earth pressure increases as the depth of the shaft increases, many reinforcing rings 12 are inserted in the deep portion of the shaft.

  For example, as shown in FIG. 13, the reinforcing ring 12 is formed by connecting a plurality of curved H-section steels 14 in a ring shape. The plurality of H-section steels 14 are connected by a joint plate 16 in a ring shape. That is, among the H-section steels 14 arranged in a ring shape, on the sides near the ends of the adjacent H-section steels 14, 14, the H-shapes adjacent to the shaft inner side (not shown) and the natural ground side, respectively. A joint plate 16 that is curved across the steels 14 and 14 is attached, and the joint plate 16 and the H-shaped steels 14 and 14 are fixed by bolts 18 and nuts 20 at four locations, for example, and a plurality of H-shaped steels 14 are formed in a ring shape. It is connected.

  Here, the bolt 18 or the nut 20 that fixes the joint plate 16 provided on the natural ground side to the end of the H-section steel 14 is fastened from the natural ground side. The space between the vertical shaft and the natural ground is narrow, and no workers can enter it. For this reason, the worker enters the shaft and the work of fixing the joint plate 16 to the H-section steel 14 is performed from the inside of the shaft. That is, the operator turns the bolt 18 or the nut 20 from the inside of the shaft to connect the H-section steel 14 and the joint plate 16.

  However, the joint plate 16 provided on the natural ground side connects the H-section steels 14, 14, that is, the portion for fastening the bolt 18 and the nut 20, is on the ground side of the shaft, and the operator attaches the bolt 18 and the nut 20. The part to be fastened cannot be seen from the inside of the shaft.

  For this reason, as shown in FIG. 11, the worker reaches for the natural ground side (left side of the figure) and inserts the bolt 18 into the joint plate 16 and the bolt hole 34 of the H-section steel 14 in a groping state. 12 is rotated by a fastening tool (ratchet wrench) 22 in a groping state as shown in FIG. 12, or, as shown in FIG. 13, the bolt 18 protruding from the bolt hole 34 of the joint plate 16 and the H-section steel 14 is used. The nut 20 is screwed in the groping state, and is tightened by turning it with the fastening tool 22 in the groping state.

  However, the operation of using the fastening tool 22 in the groping state and tightening the bolt 18 or the nut 20 in the grinding state in such an unnatural posture is difficult for the worker and has a heavy burden on the worker. Work efficiency is poor. Further, since the bolt 18 and the nut 20 are fastened in an unnatural posture, there is a concern that the bolt 18 and the nut 20 are fastened with a desired strength.

Also, such a fastening work that exposes the operator's hand to the natural ground side may cause injury to the worker by earth and sand hitting the operator's hand when there is a collapse of the natural ground. It is a danger.
No. 8-3514

  The problem to be solved by the present invention is that when a shaft is formed by a liner plate and a reinforcing ring, a bolt and nut on the natural ground side for fastening the joint plate forming the reinforcing ring and the H-shaped steel are used. The bolts and nuts are very troublesome and dangerous to fasten.

  According to the present invention, each bolt hole provided in each flange of the H-shaped steel which makes the rotating part of the rotary tool coaxial with the guide shaft part and forms a reinforcing ring has a ground-side flange and an anti-ground-side flange. When the guide shaft part is inserted into the bolt hole of the flange on the side opposite to the H-shaped steel of the reinforcing ring, the bolt or nut inserted in the rotating part of the rotary tool is The main feature is that it is coaxial with the bolt hole.

  That is, the present invention provides a rotary tool having a rotating part that rotates a bolt or a nut in a predetermined direction, a guide shaft part that is coaxially opposed to the rotating part of the rotating tool, and the rotating tool. A connecting portion for connecting the guide shaft portion, and a slide mechanism capable of causing the rotating portion and the guide shaft portion to approach and separate on the same axis, and the rotating tool and the connecting portion, A portion from the rotating portion to the guide shaft portion is substantially U-shaped.

  Here, each bolt hole provided in each flange of the H-shaped steel forming the reinforcing ring needs to be coaxial between the ground-side flange and the anti-ground-side flange.

  The connecting portion includes a parallel portion parallel to the guide shaft portion and a rising portion extending from the parallel portion to the guide shaft portion, the rising portion being slidable on the parallel portion via a slide mechanism. The guide shaft portion and the connecting portion may be held at a portion where they are in contact with each other, and the guide shaft portion is slidably held by the connecting portion via the slide mechanism. May be.

  In the former case, the connecting portion includes a slide rod integrally connected to the rotary tool, a guide tube that slidably holds the slide rod, and a branch rod that connects the guide tube to the guide shaft portion. The slide rod is parallel to the axis of the rotating portion, a projection is provided on the side of the slide rod, a slit is formed in the axial direction on the side of the guide tube, and the projection of the slide rod is slid on the slit. It may be movably engaged. Here, the slide rod corresponds to the parallel portion, and the branch rod corresponds to the rising portion. The slide mechanism is constituted by the slide rod, the protrusion, the guide tube, and the slit.

  Further, a grip rod may be integrally provided on the counter-rotating portion side of the connecting portion. Moreover, the rotating part of the rotating tool may be provided with a ratchet mechanism, or the rotating part of the rotating tool may be electrically operated. In addition, a grip rod may be provided coaxially and integrally on the counter-rotating portion side of the connecting portion.

  The bolt and nut fastening tool of the present invention is rotated by simply inserting the guide shaft portion into the bolt hole of the flange inside the shaft with the H-shaped steel flange forming the reinforcing ring and pulling the rotary tool inside the shaft. The bolts and nuts attached to the rotating part of the tool can be easily brought to the position of the bolt holes in the joint plate on the natural ground side, and the bolts and nuts can be turned simply by shaking the connecting part like a pendulum. Therefore, there is an advantage that the joint plate and the H-shaped steel can be easily fastened from the natural ground side with bolts and nuts without the operator having to reach the natural ground side from the shaft.

  In addition, the bolt / nut fastening tool of the present invention simply inserts the guide shaft portion into the bolt hole of the flange inside the shaft with the H-shaped steel flange forming the reinforcing ring, and pulls the rotating tool inside the shaft. The bolt and nut attached to the rotating part of the rotary tool can be brought to the position of the bolt hole on the joint plate, and the bolt and nut can be turned simply by shaking the connecting part like a pendulum. There is an advantage that the operator can perform bolt and nut fastening work in an easy posture.

  In addition, the bolt / nut fastening tool of the present invention simply inserts the guide shaft portion into the bolt hole of the flange inside the shaft with the H-shaped steel flange forming the reinforcing ring, and pulls the rotating tool inside the shaft. The bolt and nut attached to the rotating part of the rotary tool can be brought to the position of the bolt hole on the joint plate, and the bolt and nut can be turned simply by shaking the connecting part like a pendulum. Therefore, there is an advantage that the operator does not have to perform the bolt and nut fastening work by putting out his hand to the natural ground side with danger, and thus the bolt and nut can be safely fastened inside the shaft.

  With the minimum number of parts, the function of the fastening tool is not impaired, with the objective of fastening the joint plate and the reinforcing ring on the natural ground side with bolts and nuts from the natural ground side with bolts and nuts. Realized.

  FIG. 1 is an explanatory view of a bolt / nut fastening tool according to a first embodiment, in which 24 is a bolt / nut fastening tool according to the present invention. The bolt / nut fastening tool 24 has a predetermined distance from the rotary tool 28 having a rotary part 26 for rotating the bolt 18 or the nut 20 in a predetermined direction and tightening the bolt or nut, and the rotary part 26 of the rotary tool 28. And a guide shaft portion 30 that is coaxially opposed, and a connecting portion (described later) that connects the rotary tool 28 and the guide shaft portion 30.

  A hexagonal recess is coaxially formed in the rotating portion 26 in the case of, for example, a hexagonal bolt that conforms to the shape of the bolt head or nut for fitting the head of the bolt 18 or the nut 20. The rotating unit 26 includes a ratchet mechanism, and the operator can rotate the bolt 18 or the nut 20 in one direction only by swinging the rotating tool 28.

  The connecting portion includes a slide rod 36 integrally connected to the rotary tool, a guide tube 38 that slidably holds the slide rod 36, and a branch rod 40 that connects the guide tube 38 to the guide shaft portion 30. Become.

  The connecting portion includes a slide mechanism 32 that can move the rotating portion 26 and the guide shaft portion 30 on and off the same axis. The rotary tool 28 and the connecting portion as a whole form a substantially U-shape.

  The slide rod 36 is parallel to the axis of the rotating unit 26. A protrusion 42 is provided on the side of the slide rod 36, a slit 44 is formed in the axial direction on the side of the guide tube 38, and the protrusion 42 of the slide rod 36 is slidably engaged with the slit 44. is doing. A slide mechanism 32 is formed by the slide rod 36, the guide cylinder 38, the slit 44 and the protrusion 42.

  A grip rod 46 is provided integrally with the branch rod 40 on the side opposite to the rotating portion of the guide shaft portion 30. The rotating part 26 of the rotary tool 28 includes a ratchet mechanism and is configured to tighten the bolt 18 or the nut 20 in one direction. The rotating part 26 of the rotary tool 28 rotates the bolt 18 or the nut 20 in one direction. An electric mechanism for fastening may be provided.

  Next, a method of using the bolt / nut fastening tool according to the present invention will be described with reference to FIGS.

  First, the nut 20 is fixed coaxially with the bolt hole 34 on the surface on the back side of the flange on the ground side of the H-shaped steel 14 forming the reinforcing ring 12, and the H-shaped steel 14 is directed downward from above in the shaft. And attached to the lower end of the cylinder of the liner plate 10 connected and formed in a cylindrical shape.

  Next, as shown in FIG. 2, the bolt 18 is inserted into the rotating portion 26 of the rotary tool 28 of the tool according to the present invention, and in this state, the tool according to the present invention is held as shown in FIG. 28 is positioned on the natural ground side, and the guide shaft portion 30 is inserted into the bolt hole 34 of the flange on the anti-natural ground side of the H-section steel 14 forming the reinforcing ring 12.

  The rotary part 26 of the rotary tool 28 of the bolt / nut fastening tool according to the present invention is coaxial with the guide shaft part 30 and is provided on each flange of the H-section steel 14 forming the reinforcing ring 12. Since each bolt hole 34 is coaxial with the ground-side flange and the anti-mountain-side flange, the guide shaft portion 30 is bolted to the anti-ground-side flange of the H-shaped steel 14 of the reinforcing ring 12. When inserted into 34, the rotating portion 26 of the rotary tool 28 is positioned coaxially with the bolt hole 34 of the ground-side flange.

  Next, with the guide shaft portion 30 inserted into the bolt hole 34 of the flange on the side opposite to the ground of the H-shaped steel 14 of the reinforcing ring 12, the slide rod 36 is slid toward the side opposite to the ground. As shown in FIG. 4, the rotary tool 28 moves to the opposite ground side together with the slide rod 36, and the bolt 18 inserted into the rotary part 26 of the rotary tool 28 is a bolt hole of the flange on the ground side of the H-section steel 14. 34 is inserted.

  Next, the grip rod 46 and the slide rod 36 are held by hand, and the grip rod 46 and the slide rod 36 are moved in a pendulum manner around the guide shaft portion 30. The fastening tool 22 swings around the rotating portion 26 as shown in FIG. 5, and the bolt 18 inserted into the bolt hole 34 of the natural ground side flange is fixed to the back side of the flange while rotating in one direction. The nut 20 is screwed and finally the reinforcing ring (H-shaped steel) and the joint plate 16 are fastened and fixed by the bolt 18 and the nut 20. By providing the grip rod coaxially with the guide shaft portion, the fastening operation of the bolt and nut is further facilitated. The vertical shaft is circular, but the same applies to rectangular and oval shapes.

  FIG. 6 is an explanatory diagram of the bolt / nut fastening tool according to the second embodiment (a state where the guide shaft portion is retracted), and FIG. 7 is an explanatory diagram of the bolt / nut fastening tool according to the second embodiment (the guide shaft portion). The basic configuration of the bolt and nut fastening tool according to the second embodiment is the same as that of the bolt and nut fastening tool according to the first embodiment, but corresponds to the slide rod 36. The second connecting rod 50 corresponding to the branch rod 40 is fixed to the first connecting rod 48, and the guide shaft portion 30 is slidable with respect to the second connecting rod 50. It is different from the bolt and nut fastening tool according to.

  When fastening a bolt / nut using the bolt / nut fastening tool according to the second embodiment, an operator first holds the bolt / nut fastening tool 24 and holds the bolt 18 as shown in FIG. The rotating tool 28 is brought to the natural ground side, and in this state, the guide shaft portion 30 of the bolt / nut fastening tool 24 is inserted into the bolt hole 34 inside the shaft among the bolt holes 34 of the H-section steel 14. The bolt 18 is held at a position coaxial with the bolt hole 34 of the joint plate 16.

  Next, as shown in FIG. 9, the bolt attracted the bolt / nut fastening tool 24 while the guide shaft 30 is slid / advanced with respect to the second connecting rod 50 and held by the rotary tool 28. 18 is inserted into the bolt hole 34 of the joint plate 16 from the natural ground side. Thereafter, as in the case of the bolt / nut fastening tool according to the first embodiment, the bolt / nut fastening tool 24 is swung to fasten the bolt / nut.

  The present invention is not limited to use for fastening bolts and nuts in the case of forming a shaft, but can be used for an operator on one side of a wall to fasten a bolt or nut on the other side of the wall. It can be applied to other uses.

It is explanatory drawing of the tool for bolt and nut fastening which concerns on Example 1. FIG. It is explanatory drawing which shows the state which hold | maintained the bolt to the natural ground side using the bolt and nut fastening tool which concerns on Example 1, and is hold | maintaining in the position coaxial with a bolt hole. It is a schematic explanatory drawing which shows a mode that the operator took the volt | bolt to the natural ground side using the volt | bolt and nut fastening tool which concerns on Example 1. FIG. It is explanatory drawing which shows the state which is going to insert a bolt into the bolt hole of a coupling board from the natural ground side using the bolt and nut fastening tool which concerns on Example 1. FIG. It is explanatory drawing which shows a motion of the rotary tool seen from the natural ground side when screwing a bolt into the bolt hole of a joint board using the bolt and nut fastening tool which concerns on Example 1. FIG. Explanatory drawing of the bolt and nut fastening tool which concerns on Example 2 (state which the guide shaft part has retracted) Explanatory drawing of the bolt and nut fastening tool which concerns on Example 2 (state in which the guide shaft part is moving forward) It is explanatory drawing which shows the state which hold | maintains the volt | bolt to the natural ground side using the volt | bolt and nut fastening tool which concerns on Example 2, and is hold | maintained in the coaxial position with a bolt hole. It is explanatory drawing which shows the state which is going to insert a bolt into the bolt hole of a coupling board from the natural ground side using the bolt and nut fastening tool which concerns on Example 2. FIG. It is a perspective view of a shaft formed by a liner plate and a reinforcing ring. It is explanatory drawing which shows a mode that an operator extends a hand from the inside of a vertical shaft to the natural ground side, and inserts a volt | bolt from a natural mountain side into a bolt hole. It is explanatory drawing which shows a mode that the operator has reached | attained the hand from the inside of a shaft to the natural ground side, and has fastened the bolt inserted in the bolt hole of the joint board by the ratchet wrench from the natural ground side. It is explanatory drawing which shows a mode that an operator extends a hand from the inside of a vertical shaft to the natural ground side, and is trying to screw a nut with the ratchet wrench to the bolt protruded from the bolt hole of the joint board in the natural ground side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Liner plate 12 Reinforcement ring 14 H-section steel 16 Joint plate 18 Bolt 20 Nut 22 Fastening tool 24 Bolt / nut fastening tool 26 Rotating part 28 Rotating tool 30 Guide shaft part 32 Slide mechanism 34 Bolt hole 36 Slide rod 38 Guide cylinder 40 Branch rod 42 Projection 44 Slit 46 Grip rod 48 First connecting rod 50 Second connecting rod

Claims (7)

  A rotary tool having a rotating part that rotates a bolt or nut in a predetermined direction, a guide shaft part that is coaxially opposed to the rotating part of the rotating tool, and the rotating tool and the guide shaft part are connected to each other. And a slide mechanism that allows the rotating part and the guide shaft part to be coaxially approached and separated from each other, and the rotating tool and the connecting part from the rotating part to the guide shaft. Bolt / nut fastening tool characterized in that the part leading to the part is substantially U-shaped.   The connecting portion includes a parallel portion parallel to the guide shaft portion and a rising portion extending from the parallel portion to the guide shaft portion, and the rising portion is slidably held on the parallel portion via a slide mechanism. The bolt / nut fastening tool according to claim 1, wherein the bolt / nut fastening tool is provided.   The guide shaft portion and the connecting portion constitute a slide mechanism at a portion where they are in contact with each other, and the guide shaft portion is slidably held by the connecting portion. Bolt / nut fastening tool.   The connecting portion includes a slide rod integrally connected to the rotary tool, a guide tube that slidably holds the slide rod, and a branch rod that connects the guide tube to the guide shaft portion. The slide rod is parallel to the axis of the rotating part of the rotary tool, a projection is provided on the side of the slide rod, and a slit is formed in the side of the guide tube in the axial direction. 3. The bolt / nut fastening tool according to claim 2, wherein the projecting portion of the slide rod is slidably engaged.   The bolt / nut fastening tool according to any one of claims 1 to 3, wherein a grip rod is integrally provided on a side opposite to the rotating portion of the connecting portion.   The bolt / nut fastening tool according to any one of claims 1 to 5, wherein the rotating portion of the rotating tool includes a ratchet mechanism.   The bolt / nut fastening tool according to any one of claims 1 to 6, wherein a rotating part of the rotating tool is electrically operated.

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