JP4061484B2 - Spring plate for outer plate fastener - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a fastener for an exterior plate attached to a sound insulation wall such as an expressway, a general road, and a bridge, and more particularly, to a spring plate provided integrally with the fastener.
[0002]
[Prior art]
In general, as shown in FIG. 5, for example, a conventional sound insulating wall has a side piece erected on a concrete side wall 101 such as a road between a pair of columns 102 and 102 having a H-shaped cross section along the wall surface direction. A plurality of sound insulation wall panels 110 are vertically stacked. As shown in FIG. 6, each sound insulation wall panel 110 has its left and right side end portions 110 a, 110 a positioned in the groove portion 103 of the support column 102 and in contact with the inner side portion 102 a of the support column 102. The mounting bracket 105 made of a bent leaf spring material is fitted between the end portion 110 a and the outer side portion 102 b of the support column 102, thereby being held by the support column 102. Reference numeral 104 denotes a fall-preventing wire, which is inserted between the upper and lower panels 110... Stacked through holes 106 provided on the left and right sides of the panel and the mounting bracket 105.
[0003]
Further, as shown in FIGS. 7 and 8, an exterior plate 120 is attached to the outside of the outer side portion 102 b of the support column 102 with a fastener 130.
The exterior plate 120 is formed in a predetermined size by molding a metal plate, and reinforcing plates 121 are fixed to both side ends of the back surface. A fastener 130 is attached to the reinforcing plate 121 via a bolt 122.
[0004]
The fastener 130 basically extends substantially in the left-right direction, that is, in a direction perpendicular to the column, and is bent at one end of the metal strip (the direction close to the column, hereinafter referred to as the column side). A base plate 131 having a stop 131a, fixed to the base plate 131, and outward (in a direction in which the exterior plate is located) from the other end (a direction far from the column, hereinafter referred to as a direction opposite to the column). , Hereinafter referred to as an outward direction). Although the detailed structure of the spring plate 140 will be described later, it is formed by bending a metal strip and is given elasticity.
[0005]
A backing plate 125 provided with a pair of anti-rotation protrusions 124 is fixed to the outer side of the reinforcing plate 121 by welding or the like, and the anti-rotation protrusions 124 protrude inward from the slit holes 121a of the reinforcing plate 121. It is like that. The anti-rotation protrusion 124 prevents the fastener 130 from being rotated when the bolt 122 is tightened by locking the spring plate 140.
[0006]
A bolt insertion hole 132 that penetrates the base plate 130 and the spring plate 140 is provided. When attaching the exterior plate 120, the bolt 122 inserted into the bolt insertion hole 132, the through hole 121 b of the reinforcing plate 121 and the through hole 125 a of the backing plate 125 and screwed with the nut 123 is kept loose. In the state in which the outer side portion 102b of the support column 102 is inserted between the reinforcing plate 121 and the locking portion 130a of the fastener 130, and the spring plate 140 is disposed between the rotation preventing projections 124.124. Tighten 122. Thus, the outer side portion 102 b of the support column 102 is sandwiched between the locking portion 130 a of the fastener 130 and the reinforcing plate 121 in a state where the spring plate 140 is compressed between the base plate 131 and the reinforcing plate 121. Thus, the exterior plate 120 is elastically held by the support column 102. That is, by fastening the bolt 122, the locking portion 131 a of the base plate 131 is pressed against the outer side portion 102 a of the column 102, the spring plate 140 is elastically pressed against the reinforcing plate 121, and the exterior plate 120 is pressed against the column 102. Retained.
[0007]
Next, the structure of the spring plate 140 will be described with reference to FIG. A flat plate-like substrate portion 141 of the spring plate 140 is fixed to the base plate 131 by welding or rivets 133. The first spring piece 142 is formed by bending from the front end (opposite direction of the support column) of the base plate 141 and inclining obliquely toward the support column in the outward direction (direction of the reinforcing plate 121). The second spring piece 143 is formed by bending from the tip of 142 and extending obliquely in the direction opposite to the support in the inner direction (in the direction of the substrate 141), and bent outward from the tip of the third spring piece 143. The third spring piece 144 is formed extending in the opposite direction to the support. (Patent Document 1)
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-61122
[Problems to be solved by the invention]
The exterior plate 120 is shaken and vibrated by a vehicle passing through a highway or the like or natural ventilation, and a gap is formed between the exterior plate 120 and the column 102 or the original contact state is restored. With respect to the movement due to the vibration of the exterior plate 120, rattling and vibration noise between the support column 102 and the exterior plate 120 are prevented by the spring force of the spring plate 140 of the fastener 130.
That is, when a gap is generated between the exterior plate 120 and the support column 102 due to vibration, the direction in which the angle between the first spring side portion 142 and the substrate portion 141 is widened by the spring restoring force of the first spring piece portion 142. Thus, the distance D between the joint portion of the first spring piece portion 142 and the second spring piece portion 143 and the substrate portion 141 is increased. At the same time, the angle of the joint portion between the first spring piece portion 142 and the second spring piece portion 143 increases, and the joint portion between the second spring piece portion 143 and the third spring piece portion 144 is the substrate portion 141. The inner surface of the substrate 141 is slid in the direction of the locking portion 131a while being in contact with the inner surface.
However, since the direction in which the distance D increases and the direction in which the joint portion of the second spring piece portion 143 and the third spring piece portion 144 slides on the inner surface of the substrate portion 141 are substantially perpendicular, it cannot slide smoothly. was there.
[0010]
In particular, in the structure of the above-described conventional spring plate 140, when the exterior plate 120 is fastened and fixed to the support column 102, the angle of the joint portion between the substrate portion 141 and the first spring piece portion 142 becomes narrower, The angle of the joint portion between the first spring piece 142 and the second spring piece 143 is also narrowed. However, the angle of the joint portion between the second spring piece portion 143 and the third spring piece portion 144 is conversely expanded. And when the space | interval of the support | pillar 102 and the exterior board 120 will be in the open state, the angle of each junction part is the direction opposite to the above, ie, joining of the board | substrate part 141 and the 1st spring piece part 142. The angle of the part is in the direction of expansion, the angle of the joint part of the first spring piece part 142 and the second spring piece part 143 is also in the direction of spread, and the joint of the second spring piece part 143 and the third spring piece part 144 On the contrary, the angle of the part is narrowed.
As described above, when the distance D expands or contracts, the direction of narrowing and the direction of widening occur at the same time at each joint, so that the spring performance of the spring plate 140 deteriorates during repeated use, and finally. May impair the spring function.
[0011]
Therefore, a structure as shown in FIG. 4 is under development as the shape of the spring plate. The second spring piece portion 43 formed by smoothly bending from the first spring piece portion 42 of the spring plate 40 is formed in a substantially S shape, and when the spring plate 40 contracts, the substrate portion 41 and the first spring piece portion 42 are formed. The angle of the joint portion with the spring piece portion 42 is narrowed, and accordingly, the substantially S-shaped curved surface portions 43a and 43b of the second spring piece portion 43 are also narrowed so that the spring plate 40 extends. In this case, the angle of the joint portion between the base plate portion 41 and the first spring piece portion 42 is expanded, and accordingly, the substantially S-shaped curved surface portions 43a and 43b of the second spring piece portion 43 are also expanded. I did it.
If it does in this way, it will become a direction which a joint part and a curved surface part will expand simultaneously with respect to expansion | extension of the spring board 40, and it will become a direction where a joint part and curved surface part become narrow simultaneously with respect to the shrinkage | contraction of the spring board 40. Therefore, the sustainability of the spring function can be dramatically increased.
[0012]
However, in this structure, since the second spring piece portion 43 has a substantially S shape, the connecting portion between the first spring piece portion 42 and the second spring piece portion 43 and the tip 43c of the second spring piece portion 43 (substrate) Distance in the horizontal direction (the direction in which the tip of the second spring piece portion 43 slides on the inner surface of the base plate portion 41) with respect to the portion 41) and the second spring piece according to the expansion and contraction of the spring plate 40. The problem that the tip of the portion 43 cannot smoothly slide on the inner surface of the substrate portion 41 occurred.
In particular, when the fastener 30 is attached to the support column 2 and the exterior plate 2, the spring plate 40 is compressed from the solid line state of FIG. 4 to the two-dot chain line state. In this compressed state, the tip 43c of the second spring side 43 that is in contact with the inner surface of the substrate portion 41 is elastically deformed so as to be parallel to the inner surface of the substrate portion 41, and is in surface contact.
From this state, when vibration is generated in a direction in which a gap is generated between the support column 2 and the exterior plate 20 and it is necessary to apply a spring force in a direction in which the spring plate 40 expands, the approximate S of the second spring piece portion 43 is obtained. The letter-shaped curved surface portions 43a and 43b act on a spring force in the expanding direction. At this time, since the curved surface portions 43a and 43b of the second spring piece portion 43 are expanded, there is almost no distance that the tip 43c of the second spring piece portion 43 moves in the lateral direction (left and right direction in FIG. 4). For this reason, when a gap is generated between the support column 2 and the exterior plate 20 and a spring force is applied so that the joint portion between the first spring piece portion 42 and the second spring piece portion 43 expands outward. The inconvenience was found that the tip 43c of the second spring piece 43 could not slide smoothly on the inner surface of the substrate 42.
[0013]
In view of the above circumstances, the present invention provides a fastener, particularly a spring plate, that has good followability to the vibration of the exterior plate, and the spring plate particularly follows the vibration of the exterior plate. The object is to provide a material that can be stretched and has excellent durability.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, there is provided a spring plate for a fastener for attaching an exterior plate to a support having an H-shaped cross section, which is bent from a flat substrate portion and the tip of the substrate portion. A first spring piece portion that extends outward and is bent from the tip of the first spring piece portion and is formed toward the inner surface of the substrate portion, and has a substantially S-shaped cross section. And an inclined surface portion is formed at a portion of the substrate portion that is in contact with the second spring piece portion.
[0015]
In this configuration, the tip of the second spring piece that is in contact with the base plate can slide on the inclined surface, so that the second spring piece slides smoothly against the base plate as the spring plate expands and contracts. it can. Therefore, even when a vibration occurs in which a gap is opened between the exterior plate and the support column or the two come into contact with each other, it is possible to prevent rattling due to the vibration of the exterior plate and to suppress vibration noise.
[0016]
According to a second aspect of the present invention, in the spring plate for a fastener of an exterior plate according to the first aspect, the second spring piece portion is formed from the joint portion with the first spring piece portion, and the substrate portion and the first spring piece. It is formed in a curved surface shape smoothly in the direction of the joint portion with the portion, and is substantially S-shaped smoothly formed in a curved surface shape in the direction opposite to the joint portion between the substrate portion and the first spring piece portion from the tip. The second spring piece can be expanded and contracted smoothly according to the expansion and contraction of the spring plate, and has excellent life resistance against repeated expansion and contraction.
[0017]
According to a third aspect of the present invention, in the fastening plate spring plate of the outer plate according to the first or second aspect, the inclined surface portion extends from the inner surface of the substrate portion toward the first spring piece portion and the substrate portion. Since the second spring piece portion slides on the inclined surface portion when the spring plate is expanded and contracted, the outer plate and the column are particularly formed. The tip of the second spring piece can smoothly slide along the inclined surface with respect to the movement in which the gap is generated, that is, the movement of the spring plate in the extending direction, and the followability is excellent.
[0018]
According to a fourth aspect of the present invention, in the spring plate for a fastener for an exterior plate according to the third aspect, since the inclined surface portion is formed by bending the substrate portion, the inclined surface portion can be formed easily and at low cost.
[0019]
Embodiments of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, the exterior plate fastener 30 of the present invention includes a base plate 31 made of a metal plate having a locking portion 31 a formed to be bent in a substantially U shape on the column side, and a rivet in the outward direction of the base plate 31. A spring plate 40 is provided which is fixed at 33 and is arranged outward from the opposite direction to the support column 2. In the mounted state, the clasp 30 is basically arranged to extend in a substantially left-right direction, that is, a direction perpendicular to the column 2, and the outer edge 2 b locking portion 31 a of the column 2 is pressed against the reinforcing plate. A spring plate 40 is pressed against 21 to hold the exterior plate 20 to the column 2.
[0020]
A backing plate 25 provided with a pair of anti-rotation protrusions 24 is fixed to the outer side of the reinforcing plate 21 by welding or the like, and the anti-rotation protrusion 24 is inward from a slit hole (not shown) of the reinforcing plate 21. Protrudes to the side. The anti-rotation protrusion 24 prevents the fastener 30 from being rotated when the bolt 22 is tightened by locking the spring plate 40. The rotation preventing protrusion 24 may be provided directly on the reinforcing plate 21. The nut 23 is fixed to the backing plate 25 by welding. If the reinforcing plate 21 is provided with a female screw cylinder or a screw hole, the nut 23 can be omitted.
[0021]
When attaching the exterior plate 20, bolts inserted into the bolt insertion holes 32 that penetrate the base plate 30 and the spring plate 40, the through holes 21 b of the reinforcing plate 21, and the through holes 25 a of the backing plate 25, and screwed into the nuts 23. 22 is loosened so that the outer side 2b of the column 2 is inserted between the reinforcing plate 21 and the locking portion 30a of the fastener 30. Then, after the outer side portion 2 b of the support column 2 is inserted during this time, the bolt 22 is tightened in a state where the spring plate 40 is disposed between the rotation prevention protrusions 24, 24. As a result, the spring plate 40 is contracted between the base plate 31 and the reinforcing plate 21, and the exterior plate 20 is elastically held by the support column 2. That is, by fastening the bolt 22, the locking portion 31 a of the base plate 31 is pressed against the outer side portion of the column 2, the spring plate 40 contracts and is elastically pressed against the reinforcing plate 21, and the exterior plate 20 is The support 2 is elastically held.
[0022]
Next, the structure of the spring plate 40 will be described with reference to FIGS. A flat board portion 41 of the spring plate 40 is fixed to the fastener 30 by welding or rivets 33. A first spring piece 42 is formed by bending from the front end (opposite direction of the support column) of the substrate 41 and inclining obliquely in the support direction toward the support direction (outward direction). A second spring piece portion 43 having a substantially S-shaped cross section including two curved surface portions 43a and 43b is formed by bending from the tip of the first spring piece portion.
An inclined surface portion 44 is formed on the substrate portion 41 by bending, and a distal end portion 43c of the second spring piece portion 43 (here, the distal end portion refers to a portion that contacts the inclined surface portion 44, and is not necessarily the most advanced portion). However, it slides in contact with the inclined surface portion 44.
[0023]
In the actual mounting state, as shown in FIG. 1, when the bolt 22 is tightened, the first spring piece portion 42 of the spring plate 40 is pressed against the reinforcing plate 21, and the curved surface portion 43 a of the second spring piece portion 43. 43b are narrowed, and the tip 43c of the second spring piece 43 is in contact with the inclined surface 44.
[0024]
In this state, when the exterior plate 20 is vibrated away from the support column 2 due to vibration, the first spring piece portion 42 expands and follows, and the curved surface portions 43a and 43b of the second spring piece portion 43 are also formed. The spring force acts so as to expand to the original size. At the same time, the distal end portion 43 c of the second spring piece portion 43 slides so as to rise up the inclined surface portion 44 in a state where the distal end portion 43 c and the inclined surface portion 44 are always in contact. Accordingly, even when the exterior plate 20 moves in a direction away from the outer side portion 2 b of the support 2, the exterior plate 20 is held by the support 2 because the spring plate 40 follows with a spring force.
When the exterior plate 20 returns to the original position, that is, comes into contact with the outer side 2b of the column 2, the first spring side 42 is compressed in the direction of the substrate and the curved surface 43a of the second spring side 43 is obtained. 43b become narrower, and the spring plate 40 returns to the same state as the bolt 22 is tightened again. At this time, the tip end portion 43c of the second spring side portion 43 slides down the inclined surface 44, so that the above-described narrowing operation is smoothly realized.
[0025]
The inclined surface portion 44 may be provided with a bead in the lateral direction to increase the strength of the inclined surface portion 44. Further, by providing this bead, the contact area between the inclined surface portion 44 and the second spring piece portion 43 may be reduced to make it easier to slide.
In addition, the inclination angle of the inclined surface varies depending on the size of the fasteners, columns and exterior plates, the distance between the reinforcing plate and the base plate, etc. A range of 40 ° is preferable.
Moreover, although the inclined surface part is formed in the substantially flat surface, it is not restricted to a flat surface shape, You may make it into a slightly curved surface shape. In that case, a shape that follows the curved surface portion 43b of the second spring side portion 43 or a reverse shape may be used.
[0026]
Although the said Example is a spring board used for the fastener of an exterior board, you may apply this spring board to the mounting bracket of a sound-insulating board.
[0027]
[Effect of the present invention]
According to the first aspect of the present invention, there is provided a spring plate for a fastener for attaching an exterior plate to a column having an H-shaped cross section, which is a flat substrate portion and is bent from the tip of the substrate portion and extends outward. A first spring piece portion formed by bending the tip of the first spring piece portion toward the inner surface of the substrate portion, and a second spring piece portion having a substantially S-shaped cross section, An inclined surface portion is formed in a portion of the substrate portion that is in contact with the second spring piece portion.
In this configuration, the tip of the second spring piece contacting the base plate can smoothly slide on the inclined surface, so that it can follow the expansion and contraction of the spring plate, and a gap is formed between the exterior plate and the support column. Even when the contact vibration occurs, it is possible to prevent rattling due to the vibration of the exterior plate and to suppress the vibration noise.
[0028]
In addition, when the inclined surface portion is formed by bending the substrate portion, the inclined surface portion can be formed easily and at low cost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a sound insulation wall to which a fastener for an exterior plate according to Embodiment 1 of the present invention is attached.
2 shows a fastener of the exterior plate of FIG.
3 is a perspective view showing a spring plate of a fastener of the exterior plate in FIG. 2. FIG.
FIG. 4 is a view similar to FIG. 2 showing a fastener for an exterior plate.
FIG. 5 shows an outline of a road to which a general sound insulation wall is attached.
FIG. 6 is a cross-sectional view showing a mounting state of a conventional mounting member for a sound insulating wall.
FIG. 7 is a cross-sectional view showing a state of attachment of a conventional exterior plate fastener.
FIG. 8 is an exploded view for explaining an attachment state of the exterior plate fastener shown in FIG. 7;
FIG. 9 is a diagram for explaining an operating state of a conventional exterior plate fastener.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sound insulation wall 2 Support | pillar 2a Inner side 2b Outer side 5 Mounting bracket 10 Sound insulation panel 20 Exterior plate 21 Reinforcement plate 22 Bolt 23 Nut 24 Anti-rotation protrusion 25 Backing plate 30 Fastening plate 31 Base plate 31a Locking portion 40 Spring plate 41 Substrate portion 42 First spring piece portion 43 Second spring piece portion 43a Curved portion 43b Curved portion 43c Tip portion 44 Inclined surface portion 45 Color

Claims (4)

A spring plate for a fastener for attaching an exterior plate to a support having an H-shaped cross section, a planar substrate portion, and a first spring piece portion bent from the tip of the substrate portion and extending outward A second spring piece that is bent from the tip of the first spring piece and is formed toward the inner surface of the board part, and has a substantially S-shaped cross section, the board part comprising the second spring A spring plate for a fastener of an exterior plate, wherein an inclined surface portion is formed at a portion where the one portion contacts. 2. The spring plate for a fastener of an exterior plate according to claim 1, wherein the second spring piece portion extends from a joint portion with the first spring piece portion toward a joint portion between the substrate portion and the first spring piece portion. It is formed in a smooth curved surface shape, and is substantially S-shaped smoothly formed in a curved surface shape in the direction opposite to the joint portion between the substrate portion and the first spring piece portion from the tip. 3. The spring plate for a fastener of an exterior plate according to claim 1, wherein the inclined surface portion is formed between the substrate portion and the first spring piece portion from the inner surface of the substrate portion toward the first spring piece portion. The second spring piece is formed so as to slide on the inclined surface portion when the spring plate is extended and contracted. 4. The spring plate for a fastener for an exterior plate according to claim 3, wherein the inclined surface portion is formed by bending the substrate portion.

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