JP2019130597A - Nut runner for fastening coating plate and fastening method for coating plate using the same - Google Patents

Abstract

To provide a technology which enables the use of a nut runner by improving a reaction receiver as a fastening tool for fastening a fastening type coating plate with a bearing girder regarding a nut runner for fastening a coating plate and a fastening method for a coating plate using the same.SOLUTION: A nut runner for fastening a coating plate 1 comprises a motor, an output shaft 11, a socket 12 mounted on the output shaft 11 to be engaged with a fastening nut, a rection receiving shaft 13, and a reaction receiver 2 provided on a reaction receiving shaft 13, where the reaction receiver 2 comprises a cylinder 3 engaged with the reaction receiving shaft 13 so as to be movable forward and backward in the axial direction, an inclined member 4 extending outwardly oblique downward from a downward position of the cylinder 3 that is the downward tip of the socket 12, and horizontal member 5 extending horizontally downward from the tip of the inclined member 4, so that the horizontal member 5 of the rection receiver 2 can, upon the use of the nut runner for fastening a coating plate 1, come into contact with an H-shaped steel web or side face plate in the coating plate with the socket 12 engaged with the fastening nut.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a nut runner for fastening a lining plate and a method for fastening a lining plate using the same, and in particular, a nut runner can be used as a fastening tool for fastening a fastening type lining plate to a receiving girder. This is a technology related to a nut runner for fastening a lining plate with improved reaction force reception.

Conventionally, an impact wrench has been widely used as a fastening tool for fastening a lining plate placed on an upper surface of a receiving girder to a receiving girder with a fastening bracket (see, for example, Patent Literature 1 to Patent Literature 4). ).
Although it is conceivable to use an impact wrench or nutrunner as the fastening tool, the reason why the impact wrench is used is that the suspension hole formed in the top plate of the lining plate is small.

That is, the diameter of the suspension hole formed in the lining plate is about 65 mm, and the socket of the impact wrench can be inserted from the suspension hole.
The nut runner cannot insert the socket of the nut runner from the suspension hole due to the reaction force reception of the nut runner (see, for example, Patent Document 5).

Japanese Patent No. 5629396 (see paragraphs 0014 and 0032) Japanese Patent No. 5038801 (see paragraphs 0068 and 0070) Japanese Patent No. 4746682 (see paragraph 0017) Japanese Utility Model Publication No. 5-32407 (see paragraph 0008) Japanese Patent No. 5975756 (see FIG. 1)

In general, lining boards are used for various road excavation works such as subway construction, underground shopping, underground piping work, etc., and the fastening work of lining boards may be done late at night because it is necessary to block vehicles, etc. Many.
The fastening with the conventional impact wrench has a problem that a large noise of 110 dB (A), for example, is generated in late-night construction in an urban area due to the impact sound of the impact wrench and the resonance sound of the lining board.

Therefore, it is conceivable to use a nutrunner that does not generate a hitting sound. However, in the conventional nutrunner, the reaction force receiver extends horizontally outward from the base side of the output shaft on which the socket is mounted, and the suspension is formed on the lining plate. There was a problem that the reaction force receiver could not be inserted from the hole.
In addition, when fastening the lining plate with a large number of lining plates placed on the receiving girder, the suspension holes formed in the lining plate adjacent to the lining plate to be fastened are subjected to reaction force reception. The use of a conventional nutrunner is also conceivable by using the support portion.

However, even when the suspension hole formed in the adjacent lining plate is used as a reaction force support portion, the adjacent lining plate is used for the lining plate located at the end of the place where the lining plate is provided. The conventional nutrunner cannot be used because there is no suspension hole.
In addition, in the case where the lining plates are placed one by one on the receiving girder and the fastening work is performed in order, the ratio of the absence of the hanging holes of the adjacent lining plates that serve as support portions for the reaction force increases, The nutrunner cannot be used.

  The present invention is intended to solve the problem of noise generation of a conventional impact wrench and the problem that a nut runner cannot be used. The purpose is to provide.

The nut runner for fastening the lining plate of the present invention according to claim 1 is a nut runner for fastening the lining plate that fastens the lining plate placed on the upper surface of the receiving girder to the receiving girder by a fastening bracket,
The lining plate includes an H-shaped steel formed from an upper surface plate, a web, and a lower surface plate, and a side surface plate in which an opening is formed, and a plurality of suspension holes are formed in the upper surface plate and A through hole is formed at a position facing each of the suspension holes,
In the fastening bracket, a fastening nut screwed into the fastening bolt in a state where the fastening bolt of the fastening bracket is passed through the through hole of the lower surface plate is located in the space portion of the lining plate. ,
The nut runner for fastening the cover plate includes a motor, an output shaft, a socket attached to the output shaft and engaged with the fastening nut, a reaction force receiving shaft, and a reaction force receiver provided on the reaction force receiving shaft. And
The reaction force receiver includes a cylindrical portion engaged with the reaction force receiving shaft so as to be able to advance and retreat in an axial direction thereof, and an inclined member extending obliquely downward and outward from a lower position of the cylindrical portion serving as a lower tip of the socket. A horizontal member extending horizontally outward from the tip of the inclined member,
When using the nut runner for fastening the lining plate, the horizontal member of the reaction force receiving member in the state where the socket is engaged with the fastening nut, the web or the side plate of the H-shaped steel in the lining plate Can be brought into contact with.

  A nut runner for fastening a lining plate according to a second aspect of the present invention is the nut runner for fastening a lining plate according to the first aspect of the present invention. In addition, the cylindrical portion of the reaction force receiver is provided with the inclined member. The cylinder thickness on the provided side is larger than the cylinder thickness on the opposite side.

  The nut runner for fastening the lining plate according to the third aspect of the present invention is the nut runner for fastening the lining plate according to the first or second aspect of the invention. It is formed in the inclination ring which inclines at the same angle as the inclination member, and the said inclination member is extended from the surrounding surface by the side of the downward position of the inclination ring of the said cylindrical part.

  A nut runner for fastening a lining plate according to a fourth aspect of the present invention is the nut runner for fastening a lining plate according to the third aspect of the present invention. In addition, the horizontal member of the reaction force receiver has a width larger than a thickness. The vertical section formed large is rectangular, the inclined member of the reaction force receiving has a width larger than the thickness, and is widened toward the inclined ring side from the bent portion of the inclined member and the horizontal member. Is formed.

  According to a fifth aspect of the present invention, there is provided a nut runner for fastening a lining plate according to a fifth aspect of the present invention, in addition to the configuration of the nut runner for fastening a lining plate according to the fourth aspect of the present invention. The bending part is provided with a curved portion that curves in a convex shape obliquely downward.

A method for fastening a lining plate using the nut runner for fastening a lining plate according to a sixth aspect of the present invention is the method for fastening the lining plate using the nut runner for fastening a lining plate according to any one of claims 1 to 5. It is a method of fastening the lining plate placed on the upper surface with the fastening bracket,
The tip of the horizontal member is tilted at a predetermined angle with the reaction force receiving shaft inclined at a predetermined angle with respect to the upper surface of the upper plate of the cover plate toward the horizontal member of the reaction force receiver. And the tip of the socket is inserted into the suspension hole by making the inclination smaller than the predetermined angle,
Next, the reaction force receiving shaft is perpendicular to the upper surface of the top plate of the lining plate, and the socket is pushed downward to engage with the fastening nut, and the horizontal member of the reaction force receiver In contact with the upper surface of the lower plate of the lining plate,
The lining plate fastening nutrunner is driven in the state where the horizontal member of the reaction force is in contact with the H-shaped steel web or the side plate of the lining plate, and the lining is performed by the fastening nut. In this method, a plate is fastened to the receiving girder.

  The nut runner for fastening a cover plate according to the present invention according to claim 1 includes a motor, an output shaft, a socket attached to the output shaft and engaged with the fastening nut, a reaction force receiving shaft, and the reaction force receiving shaft. The reaction force receiver includes a cylindrical portion that is engaged with the reaction force receiving shaft so as to be able to advance and retreat in the axial direction, and a lower portion of the cylindrical portion that is a lower end of the socket. An inclined member extending obliquely downward and outward from a position; and a horizontal member extending horizontally outward from a tip of the inclined member, and when the nut runner for fastening the cover plate is used, the socket is engaged with the fastening nut. In this state, the horizontal member of the reaction force receiver can be brought into contact with the web of the H-shaped steel or the side plate of the lining plate, so that the reaction force receiver and the socket can be removed from the suspension hole of the lining plate. Insert and use nut runner for fastening lining plate Can tighten the binding nut, it is possible to reduce the noise generated in the fastening work.

  A nut runner for fastening a lining plate according to a second aspect of the present invention is the nut runner for fastening a lining plate according to the first aspect of the present invention. In addition, the cylindrical portion of the reaction force receiver is provided with the inclined member. Since the cylinder thickness on the opposite side is formed larger than the cylinder thickness on the opposite side, the cylindrical portion of the reaction force receiver can be reduced in size and weight while maintaining the strength against the external force acting on the reaction force receiver. It is.

  The nut runner for fastening a lining plate of the present invention according to claim 3 has the lower end of the cylindrical portion of the reaction force receiver in addition to the effect of the nut runner for fastening the lining plate of the present invention according to claim 1 or 2. It is formed in an inclined ring inclined at the same angle in the same direction as the inclined member, and the inclined member extends from the peripheral surface on the lower position side of the inclined ring of the cylindrical portion. The structure can be easily inserted from the suspension hole.

  The nut runner for fastening a lining plate according to a fourth aspect of the present invention is the same as the nut runner for fastening a lining plate according to the third aspect of the present invention. The vertical section formed large is rectangular, the inclined member of the reaction force receiving has a width larger than the thickness, and is widened toward the inclined ring side from the bent portion of the inclined member and the horizontal member. Since it is formed, it is possible to reduce the size and weight while maintaining the strength of the horizontal member and the inclined member of the reaction force receiver.

  According to a fifth aspect of the present invention, the nut runner for fastening the lining plate according to the present invention has the effect of the nut runner for fastening the lining plate according to the fourth aspect of the present invention. Since the bending portion is provided with a curved portion that curves obliquely downward, the reaction force receiver can be easily inserted from the suspension hole of the cover plate.

  A method for fastening a lining plate using the nut runner for fastening a lining plate according to claim 6 of the present invention uses the nut runner for fastening a lining plate according to any one of claims 1 to 5, A method of fastening the lining plate placed on the upper surface with the fastening metal fitting, wherein the reaction force receiving shaft is placed on the upper surface of the upper surface plate of the lining plate and the horizontal member of the reaction force receiving member. The front end of the horizontal member is inserted into the suspension hole while being inclined at a predetermined angle toward the side to which the is directed, and the front end of the socket is inserted into the suspension hole with the inclination being smaller than the predetermined angle. Next, the reaction force receiving shaft is perpendicular to the upper surface of the top plate of the lining plate, and the socket is pushed downward to engage with the fastening nut, and the reaction force receiving horizontal The member is brought into contact with the upper surface of the lower plate of the lining plate. The nut member for fastening the cover plate is driven by the fastening nut while the horizontal member of the reaction force is in contact with the web of the H-shaped steel or the side plate of the cover plate. Since it was set as the method of fastening a work board to the said receiving girder, using the nut runner for a lining board fastening, producing the effect of this invention which concerns on the nut runner for a lining board fastening in any one of Claims 1-5 The lining plate can be fastened.

It is a perspective view of the partial cross section which shows the state which fastens a lining board to a receiving girder by the nut runner for lining board fastening which concerns on embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the state which fastens the lining board which concerns on embodiment of this invention to a receiving girder with a fastening metal fitting, (a) is a bottom view which shows the time of fastening start, (b) is in the middle of fastening and fastening completion. (C) is a cross-sectional view taken along the line AA of (a), (d) is a cross-sectional view taken along the line BB of (b), and is a cross-sectional view showing the fastening process, and (e) is a cross-sectional view taken along the line B of (b). It is -B sectional drawing, and is sectional drawing which shows completion of fastening. It is a front view of the partial cross section which shows the nut runner for lining board fastening which concerns on embodiment of this invention. It is a figure which shows the reaction force receiving in the nut runner for lining board fastening which concerns on embodiment of this invention, (a) is a perspective view, (b) is CC sectional drawing of (a). It is a figure which shows the reaction force receiving in the nut runner for lining board fastening which concerns on embodiment of this invention, (a) is a top view, (b) is sectional drawing. It is explanatory drawing which shows the state which inserts a reaction force receiver and a socket in the suspension hole of a lining board using the nut runner for lining board fastening which concerns on embodiment of this invention, and fastens a fastening nut, (a) Is a diagram showing the start of insertion of the reaction force receiver, (b) is a diagram showing the start of insertion of the socket, (c) is a diagram showing a state immediately before engaging the socket with the fastening nut, and (d) is a fastening nut. It is a figure which shows the completion state of fastening.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIGS. 1-6 is drawing which concerns on embodiment of this invention, FIG. 1 is a perspective view of the partial cross section which shows the state which fastens a lining board to a receiving girder, FIG.2 (a) is a lining board. FIG. 2B is a bottom view showing the fastening start of the lining plate, and FIG. 2C is a bottom view showing the completion of the fastening, and FIG. 2A is a cross-sectional view taken along the line B-B in FIG. 2B, and is a cross-sectional view showing the fastening process. FIG. 2E is a cross-sectional view taken along the line B-B in FIG. FIG. 3 is a front view of a partial cross section showing a nut runner for fastening a lining plate, FIG. 4 (a) is a perspective view of a reaction force receiver, and FIG. 4 (b) is a view of C in FIG. 4 (a). -C sectional view, FIG. 5 (a) is a plan view of the reaction force receiver, FIG. 5 (b) is a sectional view of FIG. 5 (a), and FIG. FIG. 6 (b) is an explanatory view showing the start of socket insertion, . 6 (c) explanatory view and FIG showing a state immediately before engaging the fastening nut socket 6 (d) are explanatory views showing the engagement completion of the coupling nut.

<Configuration in a state where the lining plate is fastened to the receiving girder by the nut runner for fastening the lining plate>
As shown in FIGS. 1 and 2, a nut runner 1 for fastening a lining plate according to an embodiment of the present invention is configured such that a lining plate 8 placed on an upper surface 71 of a receiving girder 7 is received by a fastening bracket 9. 7 is fastened.
The lining plate 8 includes a H-shaped steel 81, a side plate 82, a fore edge plate 83, and a partition plate 84, and is well known.

The H-shaped steel 81 is formed of an upper surface plate 81a, a web 81b, and a lower surface plate 81c, and an opening 82a is formed in the side surface plate 82 for attaching the fastening bracket 9.
The opening 82a is provided in the vicinity of the corner at a predetermined length from the corner of the lining plate 8, and the side plates 82 connect the upper surface plate 81a and the lower surface plate 81c at four corners of the lining plate 8. Are connected.

The partition plate 84 is provided between the side plate 82 and the web 81b in the vicinity of the opening 82a, on the inner side in the length direction of the H-shaped steel 81 with respect to the fastener 9.
Four suspension holes 81d for suspending the cover plate 8 with a crane or the like are formed in the vicinity of the four corners on the upper surface plate 81a of the H-shaped steel 81 at both ends forming the cover plate 8. The diameter of the suspension hole 81d of the upper surface plate 81a is 64 mm, and the thickness of the upper surface plate 81a is 12.7 mm.

Further, four through holes 81e are formed in the lower surface plate 81c of the H-shaped steel 81 at positions facing the respective suspension holes 81d.
The fastening fitting 9 includes a fastening bolt 91, a fastening nut 92, a mounting nut 93, an L-shaped fitting 94, a spring 95, a rotation stopper 96 and a washer 97.

In order to attach the fastening bracket 9 to the lower surface plate 81 c of the H-shaped steel 81 of the lining plate 8, the fastening nut 92 is screwed onto the fastening bolt 91 and the washer 97 is attached to the upper side of the lower surface plate 81 c. The fastening nut 92 is positioned in the space 85 of the lining plate 8.
Next, after inserting the spring 95 and the L-shaped metal fitting 94 into the fastening bolt 91 from the lower end of the lower surface plate 81c, the mounting nut 93 is screwed together, and the lower surface of the L-shaped metal fitting 94 and the side surface of the mounting nut 93 are connected. While being fixed by welding, the lower end of the fastening bolt 91 and the lower surface of the mounting nut 93 are fixed by welding and tightened to the state shown in FIG.

The rotation stopper 96 is L-shaped in a bottom view (plan view) and is fixed to the lower surface of the lower surface plate 81c in the state shown in FIG.
The lining plate 8 is stored in the temporary storage place in the state shown in FIG. 2C in which the fastening bracket 9 is thus attached to the lower surface plate 81c of the H-section steel 81 of the lining plate 8.

Then, the lining plate 8 may be placed on the receiving girder 7 so that a slight gap is formed between the rotation stopper 96 and the end of the receiving girder 7. A guide function for positioning the eight receiving beams 7 is also achieved.
The lining plate 8 placed on the receiving girder 7 is then loosened the fastening nut 92 with a first manual tool (not shown) and integrated with the L-shaped bracket 94 with a second manual tool (not shown). The fastening bolt 91 thus made is rotated 270 degrees clockwise as viewed from the bottom, so that the state shown in FIGS. 2 (a) to 2 (b) is obtained.

2 (c) to 2 (e), reference numeral 91a denotes a slit formed in the head of the fastening bolt 91, and the L-shaped bracket changes from the state of FIG. 2 (a) to the state of FIG. 2 (b). 94 is a mark for rotating 270 degrees.
In the state of FIG. 2B, the horizontal portion of the L-shaped bracket 94 is in contact with the rotation stopper 96, and the rotation stopper 96 functions as a stopper when the L-shaped bracket 94 is rotated 270 degrees. I am doing so.

  In FIG. 2, reference numeral 98 denotes a lower reinforcing plate and 81 f denotes a buffer member fixed to the bottom surface of the lower surface plate 81 c of the lining plate 8.

<Configuration of nut runner for fastening lining plate>
The structure of the nut runner 1 for lining board fastening shown in FIG. 1 is demonstrated based on FIG.
The nut runner 1 for fastening the cover plate is mounted on the output shaft 11, the output planet 11, the motor (not shown) driven by compressed air, the reduction planetary gear mechanism (not shown), and the fastening nut 92. , A reaction force receiving shaft 13, and a reaction force receiver 2.

Further, the nut runner 1 for fastening the lining plate includes a main body case 14, a grip 15, a compressed air connection port 16, an operation lever 17, a rotation switching lever 18, a controller (not shown), a controller battery (not shown), and the like. I have.
Then, when the compressed air supply hose is connected to the compressed air connection port 16 and the operation lever 17 is operated, the socket 12 is rotated.

  The nut runner 1 for fastening the lining plate is commercially available except for the reaction force receiver 2, but the reaction force receiver 2 is provided with a suspension hole for the top plate 81a in the H-shaped steel 81 of the lining plate 8. This was developed for insertion from 81d, and its configuration will be described below.

<Configuration of reaction force receiving in nut runner for fastening lining plate>
The structure of the reaction force receiver 2 in the nut runner 1 for fastening the cover plate will be described based on FIGS. 4 and 5 with reference to FIG.
The reaction force receiver 2 includes a cylindrical portion 3 in which an inner spline 31 is formed in the inner circumferential axis direction. The reaction force receiving shaft 13 of the nut runner 1 for covering plate fastening is formed in a cylindrical shape, and the outer side in the outer circumferential axis direction. A spline 13a is formed, and the cylindrical portion 3 is engaged in the axial direction of the reaction force receiving shaft 13 so as to be able to advance and retract by spline connection.

Further, the cylindrical reaction force receiving shaft 13 has an output shaft 11 disposed in the shaft through a bearing, and a spring 13b is provided on the outer periphery thereof. The cylindrical portion 3 is biased downward.
The reaction force receiver 2 includes an inclined member 4 extending obliquely downward and outward at about 45 degrees from a lower position of the cylindrical portion 3 serving as a lower end of the socket 12, and a horizontal member extending horizontally outward from the end of the inclined member 4. And 5.

Furthermore, the cylindrical portion 3 in the reaction force receiver 2 is formed so that the cylinder thickness t1 (3.8 mm) on the side where the inclined member 4 is provided is larger than the cylinder thickness t2 (2.8 mm) on the opposite side. The cylindrical portion 3 is not a perfect circle but has a major axis of 59 mm and a minor axis of 58 mm.
Further, the lower end of the cylindrical portion 3 in the reaction force receiver 2 is formed in an inclined ring 32 that is inclined at the same angle of about 45 degrees in the same direction as the inclined member 4, and the inclined member 4 is the inclined ring 32 of the cylindrical portion 3. Extends from the peripheral surface 32a on the lower position side.

The horizontal member 5 in the reaction force receiver 2 has a width (about 20 mm) larger than a thickness (a taper shape of about 14 mm to about 8 mm), and its vertical cross section is formed in a rectangular shape.
The inclined member 4 in the reaction force receiver 2 has a width larger than the thickness, and is formed so as to expand toward the inclined ring 32 side from the bent portion of the inclined member 4 and the horizontal member 5 at about 60 degrees.

  The reaction force receiver 2 includes a curved portion 6 that is curved downward and has a radius of about 30 mm in a bent portion between the inclined member 4 and the horizontal member 5, and the inclined member 4 and the horizontal member 5 are straight in plan view. It is formed in a shape.

<Method of fastening lining plate using nut runner for fastening lining plate>
Next, a method for fastening the cover plate 8 placed on the upper surface 71 of the receiving girder 7 with the fastening metal fitting 9 using the nut runner 1 for fastening the cover plate configured as described above will be described with reference to FIGS. 6 will be described with reference to FIG.
First, the reaction force receiving shaft 13 is inclined at a predetermined angle α1 (20 degrees) to the side where the horizontal member 5 of the reaction force receiver 2 is directed with respect to the upper surface of the upper surface plate 81a of the H-shaped steel 81 of the lining plate 8. In this state, the tip of the horizontal member 5 is inserted into the suspension hole 81d (FIG. 6A).

Then, while gradually reducing the inclination of the reaction force receiving shaft 13 from the predetermined angle α1 (20 degrees), the angle α2 (10 degrees) is set to the angle α2 (10 degrees) and the tip of the reaction force receiver 2 and the tip of the socket 12 are in the suspension holes 81d. It is inserted (FIG. 6B).
Next, the socket 12 is moved downward with the reaction force receiving shaft 13 perpendicular to the upper surface of the upper surface plate 81a of the H-shaped steel 81 of the lining plate 8, and at this time, the horizontal member of the reaction force receiver 2 is moved. 5 contacts the upper surface of the lower surface plate 81c of the H-shaped steel 81 of the lining plate 8 (FIG. 6C).

Further, by pushing the socket 12 downward, the cylindrical portion 3 of the reaction force receiver 2 resists the urging force of the spring 13 b provided outside the reaction force receiving shaft 13, and the body case of the nut runner 1 for fastening the cover plate Then, the socket 12 is engaged with the fastening nut 92.
Here, the nut runner 1 for fastening the cover plate is driven while the horizontal member 5 of the reaction force receiver 2 is in contact with the web 81b of the H-shaped steel 81 or the side plate 82 (see FIG. 1) of the cover plate 8. Then, the lining plate 8 is fastened to the receiving beam 7 by the fastening nut 92 (FIG. 6D).

In this case, the side plate 82 with which the horizontal member 5 abuts is a portion that connects the upper surface plate 81 a and the lower surface plate 81 c at the corner of the lining plate 8.
In this way, the reaction force receiver 2 is obliquely downwardly outward from the lower position of the cylindrical portion 3 engaged with the reaction force receiving shaft 13 so as to be able to advance and retreat in the axial direction and the lower end of the cylindrical portion 3 of the socket 12. And a horizontal member 5 extending horizontally outward from the tip of the inclined member 4.

Then, when the nut runner 1 for fastening the cover plate is used, the horizontal member 5 of the reaction force receiver 2 is connected to the web 81b or the side of the H-section steel 81 on the cover plate 8 with the socket 12 engaged with the fastening nut 92. Since it can be brought into contact with the face plate 82, the reaction force receiver 2 and the socket 12 can be inserted from the suspension holes 81d of the cover plate 8, and the fastening nut 92 can be tightened by the nut runner 1 for fastening the cover plate. The noise generated in can be reduced to, for example, 68 dB (A).
Further, the cylindrical portion 3 is formed so that the cylinder thickness t1 on the side where the inclined member 4 is provided is larger than the cylinder thickness t2 on the opposite side, so that the strength against the external force acting on the reaction force receiver 2 can be maintained. The cylindrical portion 3 of the reaction force receiver 2 can be made small and light.

The lower end of the cylindrical portion 3 of the reaction force receiver 2 is formed in an inclined ring 32 that is inclined at the same angle in the same direction as the inclined member 4, and the inclined member 4 is located around the lower position side of the inclined ring 32 of the cylindrical portion 3. Since it extends from the surface 32a, the reaction force receiver 2 can be easily inserted from the suspension hole 81d of the lining plate 8.
The horizontal member 5 of the reaction force receiver 2 has a rectangular vertical cross section formed with a width larger than the thickness, and the inclined member 4 of the reaction force receiver 2 has a width larger than the thickness and is horizontal with the inclined member 4. Since it is formed so as to extend from the bent portion with the member 5 toward the inclined ring 32, the size and weight can be reduced while maintaining the strength of the horizontal member 5 and the inclined member 4 of the reaction force receiver 2.

  Since the reaction force receiver 2 includes a curved portion 6 that is curved obliquely downward at a bending portion between the inclined member 4 and the horizontal member 5, the reaction force receiver 2 is inserted from the suspension hole 81 d of the cover plate 8. It is easy to do.

<Release method of lining plate using nut runner for fastening lining plate>
As described above, after the covering plate 8 placed on the upper surface 71 of the receiving girder 7 is fastened by the fastener 9 using the nut runner 1 for fastening the covering plate, the covering plate 8 is released from the receiving beam 7. The method will be briefly described with reference to FIG. 6 and the above-described fastening method of the lining plate.
Here, as shown in FIG. 2 (e), the fastening bracket 9 is a state in which the cover plate 8 placed on the upper surface 71 of the receiving beam 7 is fastened by the fastening bracket 9, and is referred to in the following description. 6 (a) and 6 (b), the state of the fastener 9 is the same as in FIG. 2 (e).

First, the reaction force receiving shaft 13 is inclined at a predetermined angle α1 (20 degrees) to the side where the horizontal member 5 of the reaction force receiver 2 is directed with respect to the upper surface of the upper surface plate 81a of the H-shaped steel 81 of the lining plate 8. In this state, the front end of the horizontal member 5 is inserted into the suspension hole 81d (FIG. 6A).
Then, while gradually reducing the inclination of the reaction force receiving shaft 13 from the predetermined angle α1 (20 degrees), the angle α2 (10 degrees) is set to the angle α2 (10 degrees) and the tip of the reaction force receiver 2 and the tip of the socket 12 are in the suspension holes 81d. It is inserted (FIG. 6B).

Next, the socket 12 is moved downward with the reaction force receiving shaft 13 perpendicular to the upper surface of the upper surface plate 81a of the H-shaped steel 81 of the lining plate 8, and at this time, the horizontal member 5 of the reaction force receiver 2 is The socket 12 is engaged with the fastening nut 92 by contacting the upper surface of the lower surface plate 81c of the H-shaped steel 81 of the lining plate and further pushing the socket 12 downward (FIG. 6 (d)).
Here, in the state where the horizontal member 5 of the reaction force receiver 2 is in contact with the side plate 82 of the lining plate 8 or the web 81b of the H-shaped steel 81, the nut runner 1 for lining the plate is reversely rotated from the time of fastening. The cover plate 8 that has been driven and fastened by the fastening nut 92 is released from the receiving girder 7.

<Modification of Embodiment>
In the above embodiment, the nut runner 1 for fastening the lining plate is driven by compressed air, but it may be driven by an AC power supply or a storage battery instead of the compressed air drive.
In the above embodiment, the diameter of the suspension hole 81d formed in the upper surface plate 81a of the lining plate 8 is 64 mm and the plate thickness of the upper surface plate 81a is 12.7 mm. The sizes (dimensions) of the socket 12, the cylindrical portion 3 of the reaction force receiver 2, the inclined member 4, and the horizontal member 5 are appropriately changed according to the plate thickness of the upper surface plate 81 a.

In the above embodiment, the cylindrical portion 3 of the reaction force receiver 2 is formed so that the cylinder thickness t1 on the side where the inclined member 4 is provided is larger than the cylinder thickness t2 on the opposite side. It may be formed the same all around.
In the above embodiment, the lower end of the cylindrical portion 3 of the reaction force receiver 2 is formed in the inclined ring 32 inclined at the same angle in the same direction as the inclined member 4, and the inclined member 4 is the inclined ring 32 of the cylindrical portion 3. Although it extends from the peripheral surface 32a on the lower position side, the lower end may be horizontal without forming the inclined ring 32.

In the above embodiment, the horizontal member 5 of the reaction force receiver 2 has a rectangular vertical cross section formed with a width larger than the thickness. However, the width and thickness may be the same or the width may be smaller than the thickness. .
Further, in the above embodiment, the inclined member 4 of the reaction force receiver 2 has a width larger than the thickness and is formed so as to expand toward the inclined ring 32 from the bent portion of the inclined member 4 and the horizontal member 5. However, the width and the thickness may be the same, the width may be smaller than the thickness, and may not be divergent.

In the above embodiment, the reaction force receiver 2 is provided with the curved portion 6 that is curved in a convex shape obliquely downward at the bent portion of the inclined member 4 and the horizontal member 5, but the curved portion 6 can be eliminated. Good.
In the above embodiment, the fastening fitting 9 includes the fastening bolt 91, the fastening nut 92, the mounting nut 93, the L-shaped fitting 94, the spring 95, the rotation stopper 96, and the washer 97, but the fastening fitting 9 is the fastening bolt. 91 and the fastening nut 92 can be used as various fastening fittings for fastening the lining plate 8 to the receiving beam 7.

DESCRIPTION OF SYMBOLS 1 Clasp nut runner 11 Output shaft 12 Socket 13 Reaction force receiving shaft 2 Reaction force receiving 3 Cylindrical portion 32 Inclined ring 32a Lower peripheral surface 4 Inclining member 5 Horizontal member 6 Curved portion 7 Receiving girder 71 Receiving girder Upper surface 8 Covering plate 81 H-shape steel 81a Upper surface plate 81b Web 81c Lower surface plate 81d Hanging hole 81e Through hole 82 Side plate 82a Opening 85 Space 9 Fastening bracket 91 Fastening bolt 92 Fastening nut t1 Tube thickness t2 on the inclined member side Inclined Tube thickness α1 on the side facing the member Predetermined angle α2 Angle

Claims (6)

A nut runner for fastening a lining plate that fastens the lining plate placed on the upper surface of the receiving girder to the receiving girder by a fastening bracket,
The lining plate includes an H-shaped steel formed from an upper surface plate, a web, and a lower surface plate, and a side surface plate in which an opening is formed, and a plurality of suspension holes are formed in the upper surface plate and A through hole is formed at a position facing each of the suspension holes,
In the fastening bracket, a fastening nut screwed into the fastening bolt in a state where the fastening bolt of the fastening bracket is passed through the through hole of the lower surface plate is located in the space portion of the lining plate. ,
The nut runner for fastening the cover plate includes a motor, an output shaft, a socket attached to the output shaft and engaged with the fastening nut, a reaction force receiving shaft, and a reaction force receiver provided on the reaction force receiving shaft. And
The reaction force receiver includes a cylindrical portion engaged with the reaction force receiving shaft so as to be able to advance and retreat in an axial direction thereof, and an inclined member extending obliquely downward and outward from a lower position of the cylindrical portion serving as a lower tip of the socket. A horizontal member extending horizontally outward from the tip of the inclined member,
When using the nut runner for fastening the lining plate, the horizontal member of the reaction force receiving member in the state where the socket is engaged with the fastening nut, the web or the side plate of the H-shaped steel in the lining plate A nutrunner for fastening a lining plate, characterized in that it can be brought into contact with the lining plate.   2. The lining plate fastening according to claim 1, wherein the cylindrical portion of the reaction force receiver is formed such that a cylinder thickness on a side where the inclined member is provided is larger than a cylinder thickness on an opposite side. For nutrunner.   The lower end of the cylindrical portion of the reaction force receiver is formed in an inclined ring that is inclined at the same angle in the same direction as the inclined member, and the inclined member extends from the peripheral surface on the lower position side of the inclined ring of the cylindrical portion. The nut runner for fastening a lining plate according to claim 1, wherein the nut runner extends.   The horizontal member of the reaction force receiver has a rectangular vertical cross section formed with a width larger than a thickness, and the inclined member of the reaction force receiver has a width larger than a thickness, and the inclined member and the 4. A nut runner for fastening a lining plate according to claim 3, wherein the nut runner is formed so as to expand toward the inclined ring side from a bent portion with a horizontal member.   5. The nutrunner for fastening a lining plate according to claim 4, wherein the reaction force receiver includes a curved portion that curves in a downward and obliquely convex manner at the bent portion of the inclined member and the horizontal member. . Using the nut runner for fastening a cover plate according to any one of claims 1 to 5, a method for fastening the cover plate placed on the upper surface of the receiving girder by the fastening bracket,
The tip of the horizontal member is tilted at a predetermined angle with the reaction force receiving shaft inclined at a predetermined angle with respect to the upper surface of the upper plate of the cover plate toward the horizontal member of the reaction force receiver. And the tip of the socket is inserted into the suspension hole by making the inclination smaller than the predetermined angle,
Next, the reaction force receiving shaft is perpendicular to the upper surface of the top plate of the lining plate, and the socket is pushed downward to engage with the fastening nut, and the horizontal member of the reaction force receiver In contact with the upper surface of the lower plate of the lining plate,
The lining plate fastening nutrunner is driven in the state where the horizontal member of the reaction force is in contact with the H-shaped steel web or the side plate of the lining plate, and the lining is performed by the fastening nut. A method of fastening a cover plate using a nut runner for fastening a cover plate, wherein the plate is fastened to the receiving girder.

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