JP2012163157A - Positioning nut - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a positioning nut in which a nut body is gripped at a predetermined position, the position of a nut body can be finely adjusted according to need even though impact or vibration acts in strain removing operation or others.SOLUTION: In the positioning nut 1A, a metal made gripper body 100 has a base plate part 110, coupling parts 120, 120 arranged continuously from the end parts of in a width direction of the base plate part, and pressing part 130, 130 extending from the coupling parts 120, 120. The crosssectional shape of the respective pressing parts 130 assumes a substantial V-shape protruding downward and abutting parts 140 abutting on a groove 90 arranged in the upper surface of a base part 60 of a screw seat 50 are arranged in the distal end parts of the substantial V-shape. The position of base part 60 can be finely adjusted in a direction along the groove part 90, thereby the position of the nut body can be finely adjusted to the gripper body 100.

Description

  The present invention relates to an alignment nut used when two members are joined, and particularly to an alignment nut suitable for fixing to a vehicle body structure when equipment / equipment is mounted on a rail vehicle.

  In a rail vehicle such as a railway vehicle such as a train, after fixing a plurality of attachments to the floor of the vehicle, align the attachments on the upper surface of the attachment with a restroom unit having a plurality of attachments. After mounting on the floor, both may be fixed with bolts. In this case, there may be a dimensional error between the dimension between the mounting brackets provided on the floor of the vehicle and the dimension between the mounting parts provided in the restroom unit, and the positions of the mounting bracket and the mounting part may not match.

  FIG. 6 (FIG. 1 of Patent Document 1) shows a positioning nut (floating nut) as a fixture that absorbs the above-described dimensional error and can arbitrarily change the position of the nut to easily couple them together. Is disclosed. The positioning nut is integrally formed by bending a spring steel plate, and a plate-like nut body 10 in which a threaded hole is formed, and a nut 20 that holds the nut body 10 therein. And a pressing piece 22 in contact therewith.

  The retainer 20 is opposed to the back surface of the nut body 10 and has a back plate 21 formed with a circular insertion hole 21a communicating with the screw hole 12a, and a pair of upper and lower pressing pieces (front plate) facing the front surface of the nut body 10. 22, and a back plate 21 and a side plate 23 that connects the upper and lower ends of the pressing piece 22. The nut 10 is accommodated in a space larger in size than the nut body 10 defined by the back plate 21, the pressing piece 22, and the side plate 23. Therefore, the nut main body 10 is movable in the retainer 20 by being pinched with a finger and sliding while being accommodated in the retainer 20. At the same time, the pressing piece 22 that contacts the front surface of the seat plate of the nut body 10 elastically presses the seat plate 11 against the back plate 21. With this configuration, when the finger is released from the nut body 10, the nut body 10 can be positioned so as not to move at a desired position in the retainer 20.

JP 2010-14189 A

  In large-sized welded structures such as train bodies, the elements that make up the structure by welding (in the case of railway vehicles, underframes, side structures, wife structures, roof structures, etc.) are joined together. Distortion occurs due to expansion or contraction of the joint due to the large heat generated at times. Therefore, a dimensional error may be increased in each part of the structure. When a large strain causing a dimensional error occurs, the strain is corrected by locally heating it with a burner or hitting it with a hammer.

  The alignment nut shown in Patent Document 1 is fixed to each part of the structure by welding or the like after it is provided in a cross-sectional hat-shaped metal receiver or the like. When the above-described strain relief operation is performed in this state, the nut main body 10 that is positioned by being pressed by the spring force of the pressing piece 22 of the floating nut 1 is subjected to a predetermined stress due to shock and vibration of the strain relief operation. There is a possibility of shifting from the position. Furthermore, also when fixing the metal receiver previously provided with the alignment nut to the vertical surface, the nut main body 10 may be largely displaced downward due to the influence of gravity in addition to the above-described vibration.

  After correcting the distortion of the structure due to welding, etc., the dimensional error of each part of the structure will be small, so if the nut body provided in the alignment nut is in the specified position, the process of strain relief work Thus, the bolt can be inserted without readjusting the position of the nut main body that has been displaced from the predetermined position, so that the number of work steps can be reduced.

Therefore, in the alignment nut, even if an impact or vibration is applied to the alignment nut, the screw seat that is the nut body has a predetermined position on the gripper. There is a problem to be solved in terms of enabling retention.
The object of the present invention is to hold the screw seat, which is a nut body, at a predetermined position even if an impact or vibration, such as a work for removing strain, is applied, and finely adjust the position of the nut body as necessary. It is to provide an alignment nut.

  In order to solve the above-described problem, an alignment nut according to the present invention includes a screw seat including a screw portion and a gripping body that movably holds the screw seat, the screw seat including a plate-like base portion, A cylindrical portion projecting in the thickness direction of the base portion at a central portion of the base portion, and the screw portion provided along an axis of the cylindrical portion, and the gripping body includes a plate-like substrate portion; A connecting portion erected from both ends in the width direction of the substrate portion, and a pressing portion extending in the horizontal direction in a manner overlapping the substrate portion from each connecting portion, the pressing portion, An alignment nut that is provided in such a manner as to surround the cylindrical portion with a space between the cylindrical portion and a contact portion at a portion that presses the base portion. The base portion has a front portion corresponding to each pressing portion, respectively. With the groove is provided in a manner sandwiching the cylindrical portion, the contact portion is characterized, that for pressing the groove.

  According to the alignment nut according to the present invention, the pressing portion provided in a manner surrounding the cylindrical portion of the screw seat in the gripping body presses the groove portion provided in a manner sandwiching the cylindrical portion at the base portion of the screw seat, In order for the pressing portion to move over the groove portion, a larger force is required than when the pressing portion is simply pressing the flat base portion. Therefore, the structure in which the pressing portion presses the groove portion has an effect of restricting the screw seat from moving with respect to the gripping body, and even if an impact, vibration, or the like is applied, the pressing portion may be easily detached from the groove portion. It is suppressed. Further, if a sufficient force is applied to the screw seat, the pressing portion can get over the groove portion and the screw seat can be moved relative to the gripping body.

  The alignment nut according to the present invention provides an alignment nut capable of maintaining a predetermined position of the nut body with respect to the gripping body even when an impact, vibration, or the like associated with the strain relief operation is applied. can do.

FIG. 1 is a top view showing an embodiment of an alignment nut according to the present invention. 2 is a cross-sectional view taken along line AA of the alignment nut shown in FIG. FIG. 3 is a top view showing another embodiment of the alignment nut according to the present invention. FIG. 4 is a view showing an example in which the bottom plate of the restroom unit is fixed to the upper surface of the floor of the railway vehicle using the alignment nut according to the present invention. 5 is a cross-sectional view taken along the line BB in FIG. It is a figure which shows an example of the conventional alignment nut, (a) is a perspective view, (b) is a front view, (c) is a side view.

  Embodiments of an alignment nut according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a top view of an embodiment of an alignment nut according to the present invention, and FIG. 2 is a cross-sectional view taken along line AA of the alignment nut shown in FIG. 1 and 2, an alignment nut 1A according to the present invention includes a grip body 100 and a screw seat 50, and the screw seat 50 is gripped by the grip body 100 so as to be positioned (movable). There is a feature in the point. The gripper 100 includes a flat substrate portion 110, connecting portions 120 and 120 that are continuously provided from both ends in the width direction of the substrate portion 110 (in the direction of arrow 210), and the connecting portion 120 to the substrate portion. 110, a pair of pressing portions 130, 130 extending in a substantially horizontal direction so as to overlap with 110. The board part 110, the connecting part 120, and the pressing part 130 are integrally formed by bending a steel plate punched into a predetermined shape, and are connected so that the pressing part 130 can press the base 60 of the screw seat 50. Spring force (elastic force) is applied to the portion 120 and the pressing portion 130.

  When a bolt (male screw) is passed through a screw part 80 (female screw) provided in a screw seat 50 (described later) in the center of the board part 110, the bolt penetrates and within the plane of the board part 110. A through hole 115 having a larger diameter than the inner diameter of the threaded portion 80 is formed so that the screw seat 50 through the bolt can move.

  The screw seat 50 includes a plate-like base portion 60, a cylindrical portion 70 that is integrally provided in a central portion of the base portion 60 so as to protrude in the thickness direction thereof, and a cylindrical portion 70 that is concentrically longitudinally (surface of the base portion 60). And the above-described screw portion 80 (female screw) provided on the inner periphery of the hole penetrating in the direction perpendicular to the above. The pair of pressing portions 130, 130 provided in the gripping body 100 is provided in a manner surrounding the cylindrical portion 70 provided in the screw seat 50, and prevents the screw seat 50 from falling off the gripping body 100. A cylindrical portion is formed on the upper surface of the base portion 60 of the screw seat 50 at the center in the width direction 210 of the base portion 60 by forming a groove between each longitudinal end portion of the base portion 60 and the cylindrical portion 70. The groove portions 90, 90 are arranged in a straight line along the longitudinal direction 200 of the base portion 60 so as to sandwich the 70.

  As shown in FIG. 2, the cross-sectional shapes of the pressing portions 130 and 130 are substantially V-shaped projecting downward, and each pressing portion 130 has a substantially V-shaped tip portion and a screw seat 50. On the side that contacts the base portion 60, a contact portion 140 is provided corresponding to the groove portion 90 formed on the upper surface of the base portion 60 and formed along the longitudinal direction of the substrate portion 110. When the contact portion 140 is fitted into the groove portion 90 to contact the groove portion 90, an engagement portion that is elastically engaged is formed between the base portion 60 and the gripper 100, and the pressing portion 130. The spring restoring force acts on the groove portion 90 via the contact portion 140 to urge the base portion 60 against the gripper 100 and engages in a predetermined direction (longitudinal direction of the groove portion 90) so as to be finely adjustable. is doing.

  As described above, the substrate portion 110, the connecting portions 120, 120 provided at both ends in the width direction of the substrate portion 110, and the pressing portions 130, 130 connected to the connecting portions 120, 120 are provided in advance. The holding body 100 may be manufactured by cutting out a metal plate and forming the pressing portions 130 and 130 connected to the substrate portion 110 via the connecting portions 120 and 120 by bending. Alternatively, the gripper 100 may be manufactured by forming the substrate unit 110, the coupling unit 120, and the pressing unit 130 as separate components, and then connecting the components.

  Regardless of the manufacturing method, either the connecting part 120 and the pressing part 130 of the gripping body 100, or one of the connecting part 120 and the pressing part 130 is plastically deformed by bending, and the substrate part 110 and the pressing part 130 are pressed. The screw seat 50 held between the portion 130 and the screw portion 50 is screwed by a restoring force (elastic force, spring force) generated when one or both of the connecting portion 120 and the pressing portion 130 tries to maintain the state of plastic deformation. The seat 50 is always pressed toward the substrate portion 110 of the gripper 100 by the contact portion 140 provided in the pressing portion 130 contacting the groove portion 90 provided in the base portion 60.

  The screw seat 50 has a dimension L in the longitudinal direction 200 and a dimension in the width direction 210 between the cylindrical outer wall of the cylindrical portion 70 provided in the screw seat 50 and the end portions of the pressing portions 130 and 130 provided in the grip body 100. W can be positioned in a horizontal plane within the range of W, and the side surface of the cylindrical portion 70 is restrained by the pressing portions 130 and 130 with a predetermined gap, so that the screw seat 50 is held in the in-plane direction of the substrate portion 110. The position of the screw seat 50 can be determined within the range of the substrate portion 110 of the gripper 100 within the range of the dimension L and the dimension W without departing from 100.

  With the above configuration, it is possible to realize the alignment nut 1 </ b> A that is always gripped by the center portion in the width direction of the base portion 60 of the screw seat 50 at the center portion in the width direction of the substrate portion 110 of the grip body 100. As a result, it is possible to prevent the screw seat 50 from greatly deviating from a predetermined position (initial position) of the gripper 100 due to an impact or the like when fixing the alignment nut 1A to a metal receiver or the like. Bolts or the like (not shown) can be easily inserted and fastened to 80 with a small number of work steps.

  FIG. 3 is a top view showing another embodiment of the alignment nut according to the present invention. The parts common to the alignment nut 1A described with reference to FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted. Only the characteristic parts of the alignment nut 1B shown in FIG. 3 are described. In the alignment nut 1 </ b> B shown in FIG. 3, the two pressing portions 130, 130 provided in a point-symmetrical manner with respect to the center of the cylindrical portion 70 with the cylindrical portion 70 sandwiched between the gripping body 100 are respectively provided with contact portions. 140 and 140 are provided. The contact portions 140, 140 are provided in a manner that intersects with each other.

  One (right side in FIG. 3) groove 90 is provided along the longitudinal direction 200 of the base 60 between the end in one longitudinal direction 200 of the base 60 and the cylindrical portion 70, and the other (left side in FIG. 3). ) Is provided along the width direction 210 of the base 60 between the end portion of the other longitudinal direction 200 of the base 60 and the cylindrical portion 70. One groove portion 90 is provided in the center portion in the width direction of the base portion 60, and the other groove portion 90 is provided in the center portion between the end portion in the other longitudinal direction 200 of the base portion 60 and the cylindrical portion 70. ing.

  Each pressing portion 130 includes a contact portion 140 corresponding to the groove portion 90 in a manner along the direction in which the groove portion 90 extends. That is, the contact portion 140 provided in one (right side in FIG. 3) is formed along the longitudinal direction 200, and the contact portion 140 provided in the other (left side in FIG. 3) is 210 in the width direction 210. Formed along. Since the contact portions 140 and 140 provided in the pressing portions 130 and 130 are simultaneously aligned with the groove portions 90 and 90 provided on the surface of the base portion 60 of the screw seat 50, they constitute elastic engagement portions. The screw seat 50 can be adjusted with respect to the gripper 100 within a slight range, but is engaged and held in a substantially constant state by the elastic engagement portion.

  When the alignment nut 1A shown in FIG. 1 is used on a vertical surface, in order to grip the screw seat 50 at a predetermined place (the center portion in the longitudinal direction 200 and the width direction 210) of the grip body 100, It is desirable to arrange the contact portion 140 and the groove portion 90 of the screw seat 50 in the horizontal direction, that is, arrange the longitudinal direction of the alignment nut 1A along the horizontal direction. On the other hand, in the alignment nut 1B shown in FIG. 3, the contact portion 140 of one pressing portion 130 and the groove portion 90 of the screw seat 50, and the contact portion 140 of the other pressing portion 130 and the screw seat 50 are aligned. Since it is provided in a form that intersects with the groove part 90, when used on a vertical surface, the direction in which the alignment nut 1B is fixed is not selected. For this reason, even when the alignment nut is provided on the vertical surface, the alignment nut 1B shown in FIG. 3 has the screw seat 50 at a predetermined position of the gripper 100 (the central portion in the longitudinal direction 200 and the width direction 210). Therefore, a bolt or the like can be easily inserted and fastened with a small work man-hour. When the alignment nut 1 </ b> A is actually fastened with a bolt, the screw seat 50 moves relative to the grip body 100 so that the contact portion 140 of the pressing portion 130 exceeds the groove portion 90 of the screw seat 50. It goes without saying that there is. The elastic engagement portion composed of the contact portion 140 and the groove portion 90 prevents the screw seat 50 from unintentionally moving with respect to the gripper 100 in a state before the bolt fastening.

[Application example]
An application example in which the alignment nut according to the present invention is applied to fixing of facilities and equipment to a railway vehicle structure will be described. FIG. 4 shows an example in which the bottom plate of the restroom unit is fixed to the upper surface of the floor of the railcar using the alignment nut according to the present invention, for example, the railcar structure is the floor of the railcar, and the facilities / equipment is the restroom unit. FIG. 5 is a cross-sectional view taken along the line BB in FIG. Here, the alignment nuts 1A and 1B are collectively referred to as the alignment nut 1.

  The restroom unit bottom plate 300 is fixed to the railcar floor plate 400 via an alignment nut 1 fixed to a receiver 410 provided on the railcar floor plate 400. In this case, a bolt 310 is inserted into the screw seat 50 forming the alignment nut 1 and fastened, whereby the fixing portion 310 formed to protrude from the bathroom unit bottom plate 300 and the receiver 410 provided on the railcar floor plate 400 are bolts. It is sandwiched and fixed between the (head) and the screw seat 50. The receiver 410 has a hat-shaped vertical cross-sectional shape in the longitudinal direction 200, and a hole through which the above-described bolt can pass with a margin is formed in the horizontal portion at the center. A lower end portion has a flange (a flange portion) extending in the horizontal direction.

  The alignment nut 1 is a screw or the like using holes 150 and 150 (see FIG. 1 and FIG. 3) provided in the base plate portion 110 with respect to the horizontal back side (flange side) of the crown portion of the hat-shaped receiving metal 410. It is fixed with. The receiver 410 to which the alignment nut 1 is fixed is positioned on the upper surface of the railcar floor plate 400 with a distance P1 in the width direction 200 and a distance P2 in the longitudinal direction 210 of the railway vehicle, and then the flange of the receiver 410 is attached to the flange 410. It is fixed to the railcar floor plate 400 by MIG welding or the like.

  A fixed portion 310 that protrudes in the height direction of the bathroom unit bottom plate 300 is placed on the upper surface of the receiver 410 fixed to the upper surface of the railcar floor plate 400 at a predetermined interval P1, P2. The bathroom unit bottom plate 300 is fixed to the railcar floor plate 400 using bolts 320.

  Generally, in fusion welding represented by MIG welding or the like, a large amount of heat flows into the welded portion at the time of welding, so that the metal receiver 410 and the railcar floor plate 400 locally expand or contract due to the large amount of heat input accompanying welding. Therefore, a dimensional error may occur in the predetermined interval P1 and the interval P2. In addition, in a state where the receiver 410 having the alignment nut 1 is placed on the railcar floor plate 400, the position may be determined by tapping the receiver 410 lightly with a hammer or the like in a horizontal plane. Also in this case, a dimensional error may occur in the predetermined interval P1 and the interval P2. In the alignment nut 1 according to the present invention, even if some heat or impact acts on the alignment nut 1 during the operation of fixing the alignment nut 1 to the receiver 410, the screw seat of the alignment nut 1 is used. 50, since the contact portion 140 provided in the pressing portion 130 presses the groove portion 90 provided in the base portion 60 of the screw seat 50, the screw seat 50 has a central portion (predetermined location) of the gripping body 100 that forms the alignment nut 1. ).

  When the restroom unit bottom plate 300 is molded by FRP, a dimensional error due to shrinkage or expansion during molding occurs in the mounting pitch dimension, and the intervals P1 and P2 between the fixing portions 310 of the restroom unit bottom plate 300 are received. A dimensional error may occur between the distances P1 and P2 between the gold 410. In this case, before the bolt 320 is inserted, the screw seat 50 of the alignment nut 1 is moved to a position where the bolt 320 can be inserted with a rod-shaped tool, and then the bolt 320 is fastened. In this case, if the moving amount of the screw seat 50 with respect to the gripping body 100 is large, the contact portions 140 and 140 may be detached from the groove portions 90 and 90.

  If there is almost no dimensional error between the fixed portion 310 interval P1 and P2 of the restroom unit bottom plate 300 and the interval P1 and P2 between the receivers 410, the center of the gripper 100 of the alignment nut 1 is Since the screw seat 50 is positioned, the bolt 320 can be inserted without adjusting the position of the screw seat 50 of the alignment nut 1 with a rod-shaped tool. It can be fixed to the floor board 400.

DESCRIPTION OF SYMBOLS 1,1A, 1B ... Positioning nut 50 ... Screw seat 60 ... Base part 70 ... Cylindrical part 80 ... Screw part 90 ... Groove part 100 ... Grasping body 110 ... Substrate part 120 ... Connection part 130 ... Pressing part 140 ... Contact part 150 ... Hole 200 ... Arrow indicating the longitudinal direction 210 ... Arrow indicating the width direction 300 ... Restroom unit bottom plate 310 ... Closing plate 320 ... Bolt 400 ... Railcar floor plate 410 ... Receipt

Claims (8)

A screw seat provided with a threaded portion, and a gripping body for movably gripping the screw seat,
The screw seat includes a plate-like base, a cylindrical portion protruding in the thickness direction of the base at the center of the base, and the screw provided along the axis of the cylindrical portion,
The holding body includes a flat plate-like substrate portion, connecting portions standing from both end portions in the width direction of the substrate portion, and a pressing portion extending in the horizontal direction from each connecting portion so as to overlap the substrate portion. And,
The pressing portion is provided in a manner surrounding the cylindrical portion with a space between the cylindrical portion and a positioning nut having a contact portion at a portion pressing the base portion.
A groove portion is provided on the base portion of the screw seat so as to sandwich the cylindrical portion corresponding to each pressing portion, and the contact portion presses the groove portion,
Alignment nut characterized by. The alignment nut according to claim 1,
Each of the groove portions is provided along the longitudinal direction of the base portion between each end portion in the longitudinal direction of the base portion and the cylindrical portion,
In each of the pressing portions, the contact portion is provided in a mode along the longitudinal direction of the substrate portion corresponding to the groove portion,
Alignment nut characterized by. The alignment nut according to claim 2,
Each of the groove portions is provided in a central portion in the width direction of the base portion so that the both groove portions are linearly aligned with the cylindrical portion interposed therebetween,
Alignment nut characterized by. The alignment nut according to claim 1,
One of the groove portions is provided along the longitudinal direction of the base portion between one longitudinal end portion of the base portion and the cylindrical portion,
The other groove portion is provided along the width direction of the base portion between the other longitudinal end portion of the base portion and the cylindrical portion,
In each of the pressing portions, the contact portion is provided in a form along the direction in which the groove portion extends corresponding to the groove portion,
Alignment nut characterized by. The alignment nut according to claim 4,
The one groove portion is provided in a central portion in the width direction of the base portion,
The other groove is provided in a central portion between the other longitudinal end of the base and the cylindrical portion;
Alignment nut characterized by. In the alignment nut as described in any one of Claims 1-5,
The alignment nut is applied to a railway vehicle structure for fixing equipment / equipment installed in the vehicle;
Alignment nut characterized by. The alignment nut according to claim 6,
The railcar structure has a hat-shaped vertical cross-sectional shape, and a receiver having a through hole formed at the center thereof is fixed.
The facility / equipment is provided with a protruding fixing part,
The alignment nut is set in the receiver by attaching the grip body inside the receiver hat of the railcar structure.
In a state where the power receiver of the railway vehicle structure and the fixing portion of the facility / equipment are overlapped, a bolt that penetrates the power receiver and the fixing portion is screwed into the screw portion of the screw seat. The position of the facility / equipment can be adjusted with respect to the railcar structure by the margin around the bolt in the through-hole structure by sandwiching the receiving member and the fixing portion with the bolt and the alignment nut. That is applied to fix to,
Alignment nut characterized by. The alignment nut according to claim 6 or 7,
The railway vehicle structure is a railway vehicle floor board;
The facility / equipment is a vehicle restroom unit,
The receiver is attached to the upper surface of the railcar floor plate, and the fixing portion protrudes downward from the bottom plate of the restroom unit;
Alignment nut characterized by.

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