JP2013119944A - Nut fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nut fixing structure to a metal plate, which facilitates exchanging of nuts in a recycling process even when the nut is unusable because of damages, deformation or the like.SOLUTION: A metal plate 1 is provided with notches 12 to form at least two bent tongue pieces 13 and at least one inclined tongue piece 14. A nut 20 is fitted into between the plurality of bent tongue pieces 13 by pressing a protruding side end of the inclined tongue piece 14 back to the plate surface side, after the fitting, the protruding side end of the inclined tongue piece 14 is brought into the former inclined state, and thereby, the nut can be fixed to the metal plate 1. The nut 20 can be dismounted by pressing the protruding side end of the inclined tongue piece 14 back to the plate surface side and sliding the nut 20 from between the bent tongue pieces 13.

Description

  The present invention relates to a structure for fixing a nut to a metal plate.

Conventionally, when fixing a nut to a metal plate, methods such as welding, burring, and press fitting have been employed. For example, as shown in FIG. 8A, a stud nut 400 is welded and fixed to the metal plate 100, or the metal plate 100 is punched into a convex shape by a mold as shown in FIG. 8B. Thereafter, a screw is formed on the inner periphery of the punched hole 200 by tapping, or the stud nut 400 is press-fitted and fixed to the opening 300 provided in the metal plate 100 as shown in FIG. It was.
On the other hand, in gaming machines such as pachinko and pachislot machines, a metal casing is used from the viewpoint of recycling of gaming machines (see Patent Document 1). When such a metal casing is used, it is necessary to provide a fixing portion for fixing the internal device of the gaming machine in the casing.

JP 2004-329329 A

However, the method of fixing the stud nut by welding, press fitting, etc. as described above, or the method of forming the screw directly on the plate surface by burring, requires special tools and equipment for fixing work, so the work is Not easy. Further, when the nut is damaged or deformed, it is not possible to replace only the nut, and there is a problem that the recyclability is poor.
Therefore, the present invention has an object to provide a structure for fixing a nut to a metal plate, assuming that the nut becomes unusable due to breakage, deformation, or the like, so that the nut can be easily replaced during recycling.

The features of the present invention will be described below using the embodiments of the present invention shown in the drawings.
In addition, the code | symbol in parenthesis shows the code | symbol used in embodiment of invention, and does not limit the technical scope of this invention.
(Claim 1)
(Feature point)
The invention according to claim 1 includes a bolt insertion hole (11) formed in the plate surface of the metal plate (1), and a nut fixing portion (10) provided around the bolt insertion hole (11). The nut fixing structure is capable of fixing the nut by matching the screw hole (21, 31) of the nut (20, 30) with the bolt insertion hole (11). In this nut fixing structure, the nut fixing portion (10) is formed by bending a notch (12) provided on the plate surface of the metal plate (1) to the fixing surface side of the nut (20, 30). The plurality of tongue pieces are provided from the position corresponding to the outer shape of the nut (20, 30) toward the opposite nut side when the nut (20, 30) is disposed at a fixed position. A bent tongue piece (13) formed from a tongue-shaped notch (12A) and a position away from the position corresponding to the outer shape of the nut (20, 30) by a predetermined distance from the nut to the nut side. And an inclined tongue piece (14) formed from a tongue-shaped notch (12B) provided. Further, the bent tongue piece (13) is bent toward the nut side from the standing portion located near the side surface of the nut (20, 30) disposed at the fixed position. And a bent portion (13A) capable of locking the surface edge portion of the nut (20, 30) arranged at the fixed position. On the other hand, the inclined tongue piece (14) is formed in a plate shape projecting obliquely from the plate surface, and the projecting side end portion can come into contact with the side surface of the nut (20, 30). Further, at least two bent tongue pieces (13) are provided, and at least one inclined tongue piece (14) is provided.

  The bent tongue piece (13) and the inclined tongue piece (14) pass through the upper surface of the inclined tongue piece (14) and are arranged between at least two bent tongue pieces (13) with nuts (20, 30) is placed in a position where it can be inserted by sliding, and the nut (20, 30) is inserted between the bent tongue (13) through the upper surface of the inclined tongue (14), and the inclined By projecting the projecting side end of the tongue piece (14) into an inclined state, the standing part of the bent tongue (13) and the projecting side end of the inclined tongue (14) are connected to the nut ( 20,30) in the direction parallel to the plate surface, and the bent portion (13A) of the bent tongue piece (13) restricts the movement of the nut (20,30) in the direction perpendicular to the plate surface. The nut (20, 30) can be fixed to the metal plate (1), and the protruding side end of the inclined tongue piece (14) is pushed back to the plate surface side, and the bent tongue piece (13 ) Is formed so that it can be removed by sliding the nut (20, 30) from between And said that you are.

The bent tongue piece (13) and the inclined tongue piece (14) can be provided symmetrically about the bolt insertion hole (11). When the nut (20, 30) is fixed to the vertical metal plate (1), it is preferable to provide the inclined tongue piece (14) at a position above the nut (20, 30). The two bent tongues (13) may be capable of inserting a part of the nut (20, 30) between them, but the two bent tongues (13) are attached to the metal plate (1). It is preferable to arrange it so that it can be temporarily fixed (does not fall even if the hand is released).
The inclined tongue piece (14) should be parallel to the plate surface of the metal plate (1) when the nut (20, 30) is fitted, and the protruding side end after the nut (20, 30) is fitted. The part can be raised and inclined. Alternatively, in the process of fitting the nut (20, 30) between the two bent tongues (13), the nut (20, 30) presses the inclined tongue piece (14) and pushes it back to the plate surface side. When (20, 30) moves to the fixed position and leaves the inclined tongue piece (14), the inclined tongue piece (14) may return to its original position by elastic deformation.

  According to the present invention, since the nut (20, 30) is detachably attached to the metal plate (1) by the plurality of tongue pieces, the nut (20, 30) can be easily replaced. Further, since the tongue piece can be formed simultaneously with the punching process of the notch (12) and the bolt insertion hole (11), it is easy to manufacture.

  Since the present invention is configured as described above, it is possible to provide a structure for fixing a nut to a metal plate that allows the nut to be easily replaced during recycling even if the nut becomes unusable due to damage, deformation, or the like. it can.

It is an embodiment of the present invention and is a perspective view showing a nut fixing structure. It is embodiment of this invention, Comprising: It is a front view of a nut fixing | fixed part. 1 is a longitudinal sectional view of a nut fixing structure according to an embodiment of the present invention. 1 is a cross-sectional view of a nut fixing structure according to an embodiment of the present invention. It is a modification of embodiment of this invention, Comprising: It is a perspective view which shows a nut fixing structure. It is a front view of the nut fixing structure concerning a modification. It is another modification and is a front view of a nut fixing structure. It is a longitudinal cross-sectional view which shows the conventional nut fixing structure.

The best mode for carrying out the present invention will be described with reference to the drawings.
The nut fixing structure in the present embodiment includes a circular bolt insertion hole 11 formed by punching the metal plate 1 and a plurality of tongue-shaped nut fixing portions 10 formed on the plate surface of the metal plate 1. Yes. The nut fixing portion 10 holds the nut 20 and fixes it to the plate surface of the metal plate 1 so that a predetermined attachment member can be fixed to the metal plate 1 using the bolt 40.
As shown in FIG. 1, the nut fixing portion 10 is a tongue piece formed by bending six U-shaped notches 12 provided around the bolt insertion hole 11. Four bent tongues 13 positioned one by one and two inclined tongues 14 positioned above and below the bolt insertion hole 11 are provided. For convenience of explanation, in FIG. 1 and FIGS. 3 to 5, the direction of the arrow α is the front side. The notch 12 is formed by punching simultaneously with the bolt insertion hole 11.

  Of the notches 12, the notches 12A located on the left and right sides of the bolt insertion hole 11 are formed on the inner side (the bolt insertion hole 11 is the center of the nut fixing portion 10) as shown in FIG. The portion located on the center side of the case is continuous with the plate surface, and the bent tongues 13 are respectively formed on the plate portions 120 (FIG. 2) surrounded by the notches 12 as shown in FIG. The base part that is continuous with the plate surface of the reference part is bent to the front side, and the tip part opposite to the base part is bent to the inside. That is, the notch 12A that forms the bent tongue 13 is formed when the screw hole 21 of the nut 20 is disposed at a fixed position where the screw hole 21 of the nut 20 matches the bolt insertion hole 11, as shown by a two-dot chain line in FIG. It is formed in a tongue shape that is provided from the position corresponding to the outer shape to the side opposite to the nut, and the bent tongue piece 13 is erected from the plate surface and from the erected portion to the bolt insertion hole 11 side. It is formed in a bowl shape provided with a bent portion 13A that bends toward it (see FIG. 4). The two bent tongue pieces 13 arranged on the left and right are arranged so as to be line-symmetric with respect to the bolt insertion hole 11 with the bent portions 13A facing each other. Furthermore, the dimension between the upright portions facing each other is set so that the nut 20 arranged at the fixed position can be clamped (see the two-dot chain line in FIG. 2).

  Of the notches 12, the notches 12B located above and below the bolt insertion hole 11 are formed on the outer side (on the opposite center side when the bolt insertion hole 11 is the center of the nut fixing portion 10), as shown in FIG. ) Is continuous with the plate surface, and the inclined tongue piece 14 is formed on the plate surface of the plate portion 120 (see FIG. 2) surrounded by the notch 12 as shown in FIG. It is formed by bending the root portion that is continuous with the tip portion protruding to the front side. That is, the notch 12B forming the inclined tongue piece 14 has a predetermined distance from the position corresponding to the outer shape of the nut 20 away from the position corresponding to the outer shape of the nut 20 toward the nut side when the nut 20 is disposed at the fixed position. The formed tongue shape is formed, and the inclined tongue piece 14 is formed in a plate shape projecting obliquely from the plate surface to the front side. Specifically, the inclined tongue piece 14 positioned on the upper side is formed so that the lower side protrudes to the front side, and the inclined tongue piece 14 positioned on the lower side is formed so that the upper side protrudes to the front side (see FIG. 3). The two inclined tongue pieces 14 are arranged so as to be line-symmetric with respect to the bolt insertion hole 11 and in an arrangement direction orthogonal to the arrangement direction of the bent tongue pieces 13. Furthermore, the dimension between the projecting side ends of the inclined tongue pieces 14 facing each other is set so that the nut 20 disposed at the fixed position can be clamped (see the two-dot chain line in FIG. 2).

  And, as shown in FIG. 1B, a square nut 20 can be fixed to the nut fixing portion 10 formed as described above. Specifically, as shown in FIG. 1 (A), a nut 20 is slid from the upper side and inserted between bent tongues 13 provided side by side. At this time, as shown by a white arrow in FIG. 3, the protruding side of the upper inclined tongue piece 14 is pushed into the rear side so that the inclined tongue piece 14 does not interfere with the insertion of the nut 20. Then, when the nut 20 is moved until the lower end of the nut 20 comes into contact with the tip of the lower inclined tongue piece 14, as shown in FIG. 3, the nut is placed between the bent portion 13A of the bent tongue piece 13 and the plate surface. 20 is clamped, the lower inclined tongue piece 14 abuts on the lower end portion of the nut 20, and the nut 20 is fixed so as to be immovable in the front-rear direction and the downward direction. At this time, the screw hole 21 of the nut 20 and the bolt insertion hole 11 of the metal plate 1 match. Thereafter, if the lower end portion of the upper inclined tongue piece 14 is pushed out to the front side, the nut 20 cannot be moved upward.

When attaching an attachment member 50, such as a frame member or a bracket, to the metal plate 1 to which the nut 20 is fixed as described above, as shown by a two-dot chain line in FIG. The bolt 40 is screwed in via the attachment member 50 from the opposite side (rear side) of the plate 1 (front side). The shaft portion 41 of the bolt 40 passes through the bolt insertion hole 11 and the bolt insertion hole 21, and the screw portion is screwed into the screw hole 21 of the nut 20.
Depending on the material of the metal plate 1, when the nut 20 is fitted between the two bent tongue pieces 13, the inclined tongue piece can be moved by the nut 20 in the fitting process even if the inclined tongue piece 14 is not pushed back. If the nut 20 is moved to a fixed position and separated from the inclined tongue piece 14 by pressing the plate 14 toward the plate surface side, the inclined tongue piece 14 can return to the original inclined state by elastic deformation.

  Here, the above example is a structure in which the square nut 20 is fixed to the metal plate. However, as shown in FIG. 5, the hexagonal nut 30 having the flange portion 32 is fixed to the metal plate 1. In some cases, a similar structure can be used. That is, as shown in FIGS. 5 and 6, as the nut fixing portion 10, tongue pieces formed by bending four U-shaped notches 12 provided around the bolt insertion hole 11 are provided. Specifically, bent tongue pieces 13 are provided on the left and right sides of the bolt insertion hole 11, and inclined tongue pieces 14 are provided above and below the bolt insertion hole 11. The shapes of the bent tongue 13 and the inclined tongue 14 are the same as described above. Then, by pushing the protruding side of the upper inclined tongue piece 14 to the back side and inserting the nut 30 from above between the bent tongue pieces 13 arranged side by side, the same as above The flange portion 32 of the nut 30 is sandwiched between the bent portion 13A of the bent tongue piece 13 and the plate surface, and the upper and lower inclined tongue pieces 14 abut on the upper and lower ends of the flange portion 32 of the nut 30, The nut 30 is fixed so as not to move in the front-rear direction and the up-down direction.

In the above modification, the position where the bent tongue piece 13 and the inclined tongue piece 14 are provided, the dimension for folding the bent portion 13A of the bent tongue piece 13, etc. are matched with the dimension of the nut 30 so that the nut 30 can be held. Needless to say, make adjustments.
As an example of use of the above-described nut fixing structure, for example, when the casing of the gaming machine is formed of the metal plate 1, it is used as a fixing part for fixing various internal members and devices fixed inside the gaming machine. be able to. Specifically, although not particularly illustrated, the bolt insertion hole 11 is formed at a member attachment position (for example, a position where the middle plate is attached or a position where the control base is attached) on the casing of the metal plate 1. At the same time, the nut fixing portion 10 is formed outside the casing, and the nut fixing portion 10 holds the nut. Then, a predetermined attachment member is fixed from the inside of the housing using the bolt 40.

According to the present embodiment, the nut fixing portion 10 can be formed simply by punching and bending the metal plate 1, and the nuts 20 and 30 can be formed by simply holding the nuts 20 and 30 on the holding body fixing portion 10. Since it can be fixed to the surface, there is no need for caulking or tapping, and the work process can be simplified. Moreover, since general-purpose bolts and nuts can be used, cost reduction can be achieved. Furthermore, since the nuts 20 and 30 can be removed from the metal plate 1 without using a special instrument, the nuts 20 and 30 can be easily replaced even if the screw threads of the nuts 20 and 30 are crushed, and are suitable for recycling.
In the above-described embodiment, the inclined tongue piece 14 is positioned above and below the nuts 20 and 30, but the inclined tongue piece 14 is positioned above and below the nuts 20 and 30 and positioned above and below the nuts 20 and 30. The nuts 20 and 30 may be inserted between the bent tongue pieces 13 from the side.

Further, the arrangement of the bent tongue pieces 13 is not limited to the line-symmetric arrangement as shown in the figure. For example, in the example of the square nut 20 shown in FIG. 2, two bent tongue pieces 13 are provided on one side surface side. One bent tongue piece 13 may be provided on the opposite side surface side.
Furthermore, when the outer shape of the nut is a triangle or a hexagon, as shown in FIGS. 7A and 7B, the bent tongue 13 and the inclined tongue 14 are placed in an oblique direction in accordance with the outer shape of the nut. It may be provided.

1 Metal plate 10 Nut fixing part
11 Bolt hole 12 Notch
13 Bending tongue 14 Inclined tongue
20 Nut 21 Screw hole
30 Nut 31 Screw hole
40 bolt 50 fixing member
100 Metal plate 200 Punching hole
300 opening 400 nut

Claims (1)

Bolt insertion hole formed on the plate surface of the metal plate, and nut fixing part provided around the bolt insertion hole, and nut fixing that can fit the screw hole of the nut to the bolt insertion hole and fix the nut Structure,
The nut fixing portion includes a plurality of tongue pieces formed by bending notches provided on the plate surface of the metal plate to the fixing surface side of the nut,
As the plurality of tongue pieces,
A bent tongue formed from a tongue-shaped notch provided from the position corresponding to the outer shape of the nut toward the side opposite to the nut when the nut is disposed at the fixed position, and the position corresponding to the outer shape of the nut An inclined tongue piece formed from a tongue-shaped notch provided toward the nut side from a position a predetermined distance further away from the nut side,
The bent tongue piece is a standing portion located close to a side surface of the nut disposed at the fixed position, and the bent tongue piece is bent toward the nut side from the standing portion, and the nut disposed at the fixed position is A bent portion capable of locking the surface edge,
The inclined tongue piece is formed in a plate shape that protrudes obliquely from the plate surface, and the protruding side end portion can contact the side surface of the nut,
At least two bent tongues are provided, and at least one inclined tongue is provided;
The bent tongue piece and the inclined tongue piece are disposed at a position that allows a nut to slide between the at least two bent tongue pieces through the upper surface of the inclined tongue piece,
By fitting the nut between the bent tongue pieces through the upper surface of the inclined tongue piece and projecting the protruding side end portion of the inclined tongue piece into an inclined state, the standing portion of the bent tongue piece And the protruding end of the inclined tongue piece restricts movement of the nut in the plate surface parallel direction, and restricts movement of the nut in the plate surface orthogonal direction at the bent portion of the bent tongue piece, The nut can be fixed to the metal plate;
A nut fixing structure, wherein the projecting side end of the inclined tongue piece is pushed back to the plate surface side, and the nut is slid from between the bent tongue pieces to be removable.

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