JP6365047B2 - Sound barrier insulation for sound barrier - Google Patents

Description

  The present invention relates to a leaf spring type sound insulation plate fastener for elastically fixing a sound insulation plate in a sound insulation wall.

In general, soundproof walls provided on both sides of an automobile road are formed on a plurality of support columns erected at a predetermined interval and opposed surfaces of a pair of adjacent columns, and extend in the length direction of the columns. A U-shaped groove, and a sound insulating plate fitted between the opposed U-shaped grooves and set to have a thickness smaller than the groove width of the U-shaped groove.
A leaf spring type sound insulating plate fastener is attached to a gap between the sound insulating plate and one side surface of the U-shaped groove in cross section, and the sound insulating plate is attached to the other side of the U-shaped groove in cross section by the elastic restoring force of the fastener. It is pressed and fixed to the side surface. (Patent Document 1)

  The fastener shown in Patent Document 1 extends substantially in the vertical direction, and when mounted in the gap, the first vertical side in which one surface in the thickness direction contacts the surface on the gap side in the thickness direction of the sound insulating plate When the fastener is attached to the gap, the horizontal distance between the first portion and the first vertical side portion is increased so that the horizontal distance between the first vertical side portion and the first vertical side portion increases. An upper end portion on the opposite side surface to the first vertical side portion includes a second vertical side portion that abuts on one side surface of the U-shaped groove. Between the first vertical side and the second vertical side, a first horizontal side connected to the upper end of the second vertical side and extending from the upper end toward the first vertical side. A second horizontal side portion connected to the first vertical side portion side end portion of the first horizontal side portion and extending from the end portion toward the second vertical side portion side and downward. A second horizontal side portion connected to the second vertical side portion end portion of the two horizontal side portions, and a third horizontal side portion extending from the end portion toward the first vertical side portion side and upward, and the first horizontal side portion; The connecting portion with the second horizontal side portion is formed so as to contact the inner surface of the first vertical side portion, and the connecting portion between the second horizontal side portion and the third horizontal side portion is in contact with the inner surface of the second vertical side portion. It is formed to slide. In the fastener of Patent Document 1, the horizontal distance between the lower ends of the first vertical side and the second vertical side is set to be smaller than the gap, while the horizontal distance between the upper ends is the gap. The lower end of the first vertical side and the second vertical side of the fastener is inserted into the gap, and the first vertical side is struck with a hammer or the like from above. And the upper end of the second vertical side are bent toward each other and inserted into the gap between the sound insulating plate and the U-shaped groove in cross section.

  In the clasp of the above-mentioned patent document 1, when it is inserted into the gap between the groove portion of the column of the soundproof wall and the edge portion of the sound insulation plate, the upper ends of the first vertical side portion and the second vertical side portion are narrowed. The connecting portion between the first horizontal side and the second horizontal side contacts the inner surface of the first vertical side, and the connecting portion between the second horizontal side and the third horizontal side contacts the inner surface of the second vertical side. To do. Further, as the distance between the first vertical side portion and the second vertical side portion is narrowed, both connecting portions are required to slide downward while contacting the inner surfaces of the first vertical side portion and the second vertical side portion, respectively. The However, in the connection part, when the fastener is inserted into the gap and the distance between the two vertical side parts is narrowed, the contact resistance increases from the moment of contact with the inner surface of the vertical side part. Hateful. Actually, the direction when both vertical sides are narrowed is substantially horizontal (or slightly obliquely downward), whereas the direction in which the connecting part slides is substantially vertical, and the action of the sliding direction The force is too small to get a sliding force. Usually, when the fastener is inserted, the first lateral side portion is struck down, so that the connection portion between the first lateral side portion and the second lateral side portion is in contact with the inner surface of the first vertical side portion while being downward. Forcibly pushed down and slips. However, at the connecting portion between the second lateral portion and the third lateral portion, there is no such forced downward acting force, and it often occurs that the connecting portion does not slip. In some cases, a strange force is applied to the second vertical side portion and deforms to weaken the spring force. In an extreme case, the second vertical side portion may be partially damaged.

  In the fastener of Patent Document 1, with respect to the straight line connecting the connection portions of the first horizontal side portion and the second horizontal side portion, the connection portions of the second horizontal side portion and the third horizontal side portion, The longitudinal direction of the second lateral side portion is inclined downward. Therefore, when the fastener is attached, if the distance between the first vertical side portion and the second vertical side portion is suddenly narrowed, the center is downwardly convex (upper concave) even if the second horizontal side portion is deformed. Transforms into As a result, the angle of the connecting portion between the first lateral side and the second lateral side (that is, the angle between the first lateral side and the second lateral side) becomes wider than the initial state, resulting in a smooth curve. So it becomes slippery. However, the connecting portion between the first horizontal side portion and the second horizontal side portion becomes slippery with respect to the inner surface of the first vertical side portion, and the connecting portion between the second horizontal side portion and the third horizontal side portion is , It is still in a state where it is difficult to slip with respect to the inner surface of the second lateral side portion. Therefore, also in this Patent Document 2, the first vertical side portion and the second vertical side portion are forcibly made in a state where the connecting portion between the second horizontal side portion and the third horizontal side portion does not slide on the inner surface of the second vertical side portion. The interval between and will be narrowed. As a result, the second lateral side is buckled and the elastic restoring force is lost.

  In particular, recently, a stainless steel plate has been used as a material for the fastener, instead of a normal steel material. In the case of a normal steel plate, the surface was subjected to a rust prevention treatment such as galvanization, so that it was relatively slippery when in contact with each other. However, this stainless steel plate is often used as it is without being plated as described above. In that case, it is relatively difficult to slip when in contact with each other, and the above problem is greatly highlighted. It is supposed to be.

  When the sound insulation plate fastener is inserted into the sound insulation wall gap with respect to the sound insulation plate fastener of the sound insulation wall as described above, the connection portion between the second lateral portion and the third lateral portion is the second vertical portion. There is also known one that aims to smoothly come into contact with the inner surface of the side and slide down. (Patent Document 2)

Japanese Utility Model Publication No. 04-57513 JP 2005-307632 A

In the thing of patent document 2, the slip is improved compared with patent document 1 grade | etc., And it is put to practical use. Recently, a sound insulating plate made of a synthetic resin such as a translucent plate has come out, and the weight is reduced. In addition, the length of the sound insulation plate itself is increased, and the space between the support columns to which the sound insulation plate is fitted is increased, so that the number of support posts and the number of fasteners is reduced, and the cost is reduced. There is a demand to reduce the assembly man-hours.
In order to use such a large sound insulation board, the fasteners of Patent Documents 1 and 2 have insufficient load resistance, and it is necessary to double the load bearing force applied to the fasteners. ing. In simple terms, it is conceivable to increase the thickness of the fastener to increase the load resistance, but this has the problem of increasing costs and weight.
Therefore, in the present invention, the purpose of the present invention is to significantly improve the load resistance by devising the shape of the fastener, using the fastener with the current plate thickness as much as possible without changing the thickness of the fastener. And

In order to achieve the above object, the first invention provides:
In a soundproof wall comprising a rectangular sound insulating plate and a support column having a groove portion that supports the edge of the sound insulating plate, when the sound insulating plate is inserted into the groove portion of the support column, the groove portion and the sound insulating plate A leaf spring type fastener that is mounted in a gap with the end edge portion and presses the sound insulating plate against the groove portion by elastic restoring force, and extends in a substantially vertical direction, and when mounted in the gap, the thickness direction The first vertical side portion that is in contact with the surface on the gap side in the thickness direction of the sound insulating plate and the first vertical side portion that faces the first vertical side portion, and the horizontal distance between the first vertical side portion is on the upper side The upper end of the side opposite to the first vertical side in the thickness direction abuts against one side of the U-shaped cross-section groove when extending in a substantially vertical direction so as to become larger toward the gap. 2 vertical sides and the upper end of the second vertical side are connected to the first vertical side from the upper end. A first horizontal side portion that extends, and a second horizontal side that is connected to the first vertical side portion side end portion of the first horizontal side portion and extends from the end portion toward the second vertical side portion side and obliquely downward. A third horizontal side portion connected to the second vertical side portion side end portion of the second horizontal side portion and extending from the end portion toward the first vertical side portion side and downward or upward from the side portion; A connecting portion between the first horizontal side portion and the second horizontal side portion is formed as a first contact portion capable of contacting the inner surface of the first vertical side portion, and the second horizontal side portion and the above-mentioned A second contact portion that can contact the inner surface of the second vertical side portion is formed between the connection portion with the third horizontal side portion and the third horizontal side portion,
An inclined side connected to the lower end of the second vertical side and extending obliquely downward from the lower end toward the first vertical side, and connected to the lower end of the inclined side, and from the lower end to the first Extending in the direction of one vertical side, and having a lower side connected to the lower end of the first vertical side,
In a state in which the clasp is mounted on the support column, the second contact portion is an inner surface of the second vertical side portion with respect to a movement in which a gap between the first vertical side portion and the second vertical side portion is narrowed. And then slips downward from the inner surface of the second vertical side portion, moves to the inner surface of the inclined side portion and slides obliquely downward, and the first vertical side portion and the second vertical side portion On the contrary, the second contact portion is in contact with the inner surface of the inclined side portion and is slid obliquely upward.

According to a second invention, in the first invention, after the second contact portion comes into contact with the inner surface of the second vertical side portion and slides downward, at the boundary between the second vertical side portion and the inclined side portion. A bent portion is formed at the connecting portion between the lower end portion of the second vertical side portion and the inclined side portion so as to stop once and then contact the inner surface of the inclined side portion and slide obliquely downward. It is characterized by that.

According to a third invention, in the second invention, when the second contact portion slides on the inner surface of the inclined side portion, the contact portion between the third horizontal side portion and the second horizontal side portion is the inclined side. And the tip of the third lateral side is not in contact with the inner surface of the inclined side.

According to a fourth aspect, in the third aspect, the second lateral side and the third lateral side are provided at right angles.

In the first invention, when mounting in the gap between the sound insulation plate of the soundproof wall of the fastener and the column, the lower part of the first vertical side portion and the second vertical side portion of the fastener is inserted into the gap, When the insertion is further forced, the first contact portion comes into contact with the inner surface of the first vertical side portion, the second contact portion comes into contact with the inner surface of the second vertical side portion, and further insertion, The interval between the vertical side portion and the second vertical side portion is narrowed. At that time, since the first contact portion is forced into the first lateral side portion and a downward force is applied, the inner surface of the first vertical side portion can smoothly slide downward. . Further, the second contact portion smoothly slides downward on the inner surface of the second vertical side portion, rides on the inclined side portion and slides, and the second contact portion comes into contact with the inclined side surface and stops. Therefore, in this state, the fastener is shrunk and elastically held in the groove portion, so that a restoring force for returning to the original state is strong and a strong compression load is obtained. In particular, around the end of insertion when the fastener is inserted into the groove portion, conventionally, the second contact portion slides in contact with the inner surface of the second vertical side portion, so that it slides smoothly, but the load during compression is not large, The elastic restoring force was not strong. However, in the first invention, after the second contact portion slides in contact with the inner surface of the second vertical side portion, the second contact portion rides on the inclined side portion and slides. The compressive force becomes stronger, that is, this means that the elastic restoring force can be stronger than in the prior art. Therefore, the compression load resistance (or elastic restoring force) of the fastener can be strengthened, so that the required strength as a fastener is ensured even if the length of the soundproof plate is increased and the spacing between the columns is widened. It is excellent in that it can
On the contrary, when the distance between the first vertical side portion and the second vertical side portion becomes wide, the second contact portion slides and rises on the inclined side portion. Sex can be maintained.

In the second invention, the second contact portion slides downward on the inner surface of the second vertical side portion, and is a bent portion provided at a connection portion between the lower end portion of the second vertical side portion and the inclined side portion. Then stop. As a result, the compression load resistance of the fastener is rapidly increased and can withstand a large load. At the same time, when a larger load is applied, the second vertical side portion slides on the inclined side portion, so that the inclined side portion can be slid while maintaining high compression load resistance. At this time, conversely, if the distance between the first vertical side portion and the second vertical side portion becomes wide, the second contact portion rises by sliding on the inclined side portion. The loadability can be maintained. In particular, even when the distance is significantly narrowed and the second contact portion reaches the upper end portion of the inclined side portion, the second contact portion is maintained at the bent portion, so that it can be assumed that high compressive load resistance is maintained.

In the third invention, the contact portion between the third lateral side portion and the second lateral side portion is in contact with the inner surface of the inclined side portion, and the lower end portion of the third lateral side portion is the side of the inclined side portion. Since it becomes non-contact with the inner surface, the second contact portion can smoothly slide along the inclined side portion.

In the fourth aspect of the invention, since the second lateral side and the third lateral side are provided at a right angle, the second contact portion is a bent portion, and the inclined side can be smoothly slid.

It is sectional drawing which shows the state by which the sound-insulation board fastener which concerns on Embodiment 1 of this invention was attached to the sound-proof wall. It is a perspective view of a sound-insulating board fastener. FIG. 2 is a simplified diagram for explaining the state of the sound insulating plate fastener when the interval is narrowed after the sound insulating plate fastener is inserted into the column as shown in FIG. 1. It is a graph which shows the relationship between a compression load and a space | interval.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
1 to 3 show an example in which a fastener is applied to a soundproof wall according to Embodiment 1 of the present invention.
As shown in FIG. 1, a soundproof wall 1 provided with a fastener 10 is shown, and the soundproof wall 1 has a predetermined interval in a direction along the automobile road on both sides of the automobile road (the front and back direction of the paper surface of FIG. 1). It is provided with a number of columns 2, 2,. In FIG. 1, the cross section shows a state in which the sound insulating plate 4 and the fastener 10 are fitted into the column 2. The support column 2 is omitted from the drawing, but is made of H-shaped steel and has two U-shaped groove portions 3 and 3 extending in the length direction of the support column 2. The opening of each groove portion 3 is an automobile. It is erected so as to face in the direction along the road (the front and back direction in FIG. 1). That is, each groove part 3 is formed in the opposing surface of a pair of adjacent support | pillars 2 and 2 mutually.

  A plurality of sound insulating plates 4, 4,... Extending in the direction along the automobile road are fitted between the opposing groove portions 3 and 3 on the opposing surfaces of the pair of support columns 2 and 2 while being stacked in the vertical direction. Yes. Each of the sound insulating plates 4 is made of a plastic such as polycarbonate or a box type made of iron, aluminum, concrete, or the like, and the thickness t is set smaller than the groove width W of the groove portion 3. In addition, the metal exterior board (not shown) is stuck and fixed to the side surface opposite to the motorway of each support | pillar 2. As shown in FIG.

  In the gap (gap amount S = W−t) between each sound insulating plate 4 and each side surface on the opposite side of the automobile road in each groove portion 3, the sound insulating plate 4 is pressed against the side surface on the automobile road side of the groove portion 3 by elastic restoring force. In addition, a leaf spring type sound insulating plate fastener 10 made of spring steel or the like is mounted. The fastener 10 is provided at the upper end of each end portion in the length direction of each of the sound insulation plates 4, and the upper end portion of the side surface (the gap side surface) opposite to the automobile road in the thickness direction of the sound insulation plate 4 is the automobile road side. It is comprised so that it may press. A projection 4 a that fits into the fitting hole 11 a of the attachment side 11 of the fastener 10 is provided at the upper end of each sound insulating plate 4. In addition, the attachment side 11 of the fastener 10 that is superimposed on the upper side of the fastener 10 is provided with a recess 4b into which the protrusion 4a that fits into the hole 11a and protrudes further upward is inserted. As a result, the fastener 10 is prevented from being detached, and the sound insulating plate 4 is aligned, and the movement of the lower end portion in the thickness direction is restricted.

  Specifically, as shown in FIG. 1, when the fastener 10 is attached to the gap S, the fastener 10 is attached to the lower surface of the attachment side portion 11 in contact with the upper end surface of the sound insulating plate 4. The fitting hole 11a is substantially fitted into the fitting section 4a (see FIG. 1) having a circular cross section that protrudes from the upper end surface of the side section 11. An upper end portion of the first vertical side portion 12 extending substantially in the vertical direction is connected to the end portion of the attachment side portion 11 opposite to the automobile road. The side surface of the automobile road in the thickness direction of the first vertical side portion 12 comes to substantially abut on the side surface of the gap in the thickness direction of the sound insulating plate 4 when the fastener 10 is mounted in the gap S. Yes.

  Connected to the upper end portion of the second vertical side portion 13 is a first horizontal side portion 14 extending from the upper end portion toward the first vertical side portion 12 and obliquely downward to substantially the vicinity of the first vertical side portion 12. Yes. The first vertical side portion 14 side end portion (lower end portion) of the first horizontal side portion 14 is substantially near the second vertical side portion 13 on the second vertical side portion 13 side and obliquely downward from the end portion. The 2nd horizontal side part 15 extended to is connected. A third horizontal side portion 16 extending from the end portion toward the first vertical side portion 12 side and obliquely downward is connected to the end portion of the second horizontal side portion 15 on the second vertical side portion 13 side. . The second lateral side and the third lateral side are provided at a substantially right angle. A connection portion between the first lateral side portion 14 and the second lateral side portion 15 is provided with a first contact portion 17 having a substantially arc-shaped cross section that can contact the inner surface of the first longitudinal side portion 12, and the second lateral side portion A second contact portion 18 having a substantially arc-shaped cross section that can come into contact with the inner surface of the second vertical side portion 13 is provided at a connection portion between 15 and the third horizontal side portion 16. The first contact portion 17 and the second contact portion 18 are formed in a smooth cross-sectional substantially arc shape.

The third horizontal side portion 16 extends from the end portion toward the second vertical side portion 13 and obliquely upward to the side end portion of the second vertical side portion 13 of the second horizontal side portion 15. It may be provided. In this case, it is preferable that the distal end of the third horizontal side portion 16 be further bent so as to extend toward the second vertical side portion 13 and obliquely upward.
The first contact portion 17 and the second contact portion 18 are not arcuate and may be simple bent portions.

  The inclined side portion 20 is connected to the lower end portion of the second vertical side portion 13 and is provided to extend obliquely downward from the lower end portion toward the first vertical side portion 12. The lower side portion 19 is connected to the lower end portion of the inclined side portion 20, extends from the lower end portion toward the first vertical side portion 12, and is connected to the lower end portion of the first vertical side portion 12. The interval between the lower end portions of the first vertical side portion 12 and the second vertical side portion 13 is formed slightly smaller than the gap S and is easily inserted into the gap S. The upper end of the side surface opposite to the first vertical side portion 12 in the thickness direction of the second vertical side portion 13 (the side opposite to the automobile road) is the same as the automobile road of the groove portion 3 when the fastener 10 is attached to the gap S. It comes into contact with the opposite side surface.

The narrower angle α of the corner portion between the second lateral side portion 15 and the third lateral side portion 16 and the second lateral side portion 15 and the inclined side when the second lateral side portion 15 contacts the inclined side portion 20. The narrower angle β with the portion 20 satisfies α ≧ 90 °> β. As a result, not only the corner portion contacts and slides on the inclined side portion 20, but also the tip portion of the third lateral side portion 16 does not contact the inclined side portion 20. As a result, slip resistance is prevented. At the same time, the strength of the second contact portion 18 is increased.
The narrower angle between the inclined side portion 20 and the second vertical side portion 13 varies depending on the gap S, the required compression strength, and the like, but a practical range is 50 ° to 20 °.

  A bead-shaped first deformable portion 31 that protrudes inward (in the direction of the first vertical side portion 12) is formed on the second vertical side portion 13. At a substantially intermediate position in the vertical direction of the second vertical side portion 13, there is a retaining protrusion 40 that is formed by cutting out a part in the width direction of the first deformable portion 31 and whose tip can contact the inner surface of the groove portion 3 of the column 2. Is provided. The retaining protrusion 40 prevents the fastener 10 from coming out of the gap S due to vibration or the like.

  A first reinforcing bead portion 32 is provided at the center portion in the width direction of the first lateral side portion 14 and the second lateral side portion 15 so as to protrude inward substantially over the entire length in the length direction. The first reinforcing bead portion 32 is formed so as to continuously protrude toward the inside with the same width also on the first contact portion 17 between the first lateral side portion 14 and the second lateral side portion 15. The strength of the first lateral side portion 14, the second lateral side portion 15 and the first contact portion 17 is increased.

  Specifically, the situation when the fastener 10 is inserted into the gap S will be described. In the first embodiment, as shown in FIG. 2, the fastener 10 is in a free state, the first contact portion 17 does not contact the inner surface of the first vertical side portion 12, and the second contact portion 18 also has the second vertical length. This is an example in which a floating state is used from the inner surface of the side portion 13. As shown in FIGS. 1 and 3, when the fastener 10 is inserted into the gap S and the first lateral side portion 14 is struck with a hammer or the like and further inserted into the interior, the first vertical side portion 12 and the second longitudinal side portion 12 are connected. The interval with the vertical side portion 13 becomes narrow, and first the first contact portion 17 slides downward while contacting the inner surface of the first vertical side portion 12. Accordingly, the second contact portion 18 comes into contact with the first deformable portion 31, slides on the first deformable portion 31 and moves downward, and further moves to the inner surface of the second vertical side portion 13 and slides. In this state, in FIG. 4, as the interval S becomes narrower, the compression resistance load gradually increases. Since this gap does not change greatly in the normal use range, the second contact portion 16 can be used to the extent that it slides up and down the inner surface of the second vertical side portion 13.

  On the other hand, when the soundproof wall 1 is vibrated greatly due to large vibrations or strong winds, and a large load is applied to the gap, the second contact portion 16 becomes the second vertical side portion 13. Then, a downward force is applied. At this time, the second contact portion 18 is held in contact with the bent portion 21 provided at the boundary between the second vertical side portion 13 and the inclined side portion 20. In this state, in FIG. 4, the interval S hardly changes and the compression resistance load increases abruptly. Thus, the fastener 10 can hold the sound insulating plate 4 with a large elastic restoring force.

  Further, when the force is applied so that the interval S becomes narrower than that, the second contact portion 18 moves from the inner surface of the second vertical side portion 13 to the inner surface of the inclined side portion 20 and slides obliquely downward. . In this state, in FIG. 4, the compressive load gradually increases gradually, while the second contact portion 18 slides on the inclined side portion 20 from the point where the compressive load suddenly increases in FIG. 4. As a result, the second contact portion 18 slides in contact with the inclined surface of the inclined side portion 20 narrowed further inside than the second vertical side portion 13, so that the compression load of the fastener 10 increases. As a result, the restoring force of the fastener 10 is strengthened.

  In contrast, for the movement in which the gap between the first vertical side portion 12 and the second vertical side portion 13 becomes wide, the second contact portion 18 contacts the inner surface of the inclined side portion 20 and slides obliquely upward. It is like that. In this state, when a force that increases the distance S is applied, the second contact portion 18 contacts the inclined surface of the inclined side portion 20 and slides upward. In this state, as shown by the dotted line in FIG. 4, the compressive load is slightly weakened, but since the high compressive load is still maintained, a high elastic restoring force can be maintained.

  When the fastener 10 is inserted into the gap S and the distance between the first vertical side portion 12 and the second vertical side portion 13 is narrowed, the second horizontal side portion 15 is basically not deformed. Slightly elastically deformed and curved. In this case, since the longitudinal direction of the second lateral side portion 15 is located below the virtual line connecting the first contact portion 17 and the second contact portion 18, the second lateral side portion 15 is elastically deformed. When it does, it swells downward and deforms. As a result, the angle between the first lateral side portion 14 and the second lateral side portion 15 increases, and the curvature of the first contact portion 17 decreases, so that the first contact portion 17 becomes slippery and buckles. Deformation and cracking are less likely to occur.

  As described above, while the fastener 10a is being used in the gap S, the soundproof wall is shaken by vibration, strong wind, etc., and the gap interval is reduced or enlarged. The interval between the first vertical side 12 and the second vertical side 13 always changes. Therefore, it is necessary for the fastener to smoothly follow the reduction / expansion of the interval. That is, it is necessary for the second contact portion 18 to smoothly slide on the inner surface of the second vertical side portion 13 in order to smoothly follow the reduction / expansion of the interval. At the same time, it is necessary to increase the resistance to compression.

  Thus, as described above, the fastener is strongly required to smoothly follow the reduction and enlargement of the gap after insertion. In response to this requirement, the second contact portion 18 has a function of sliding in contact with the inclined side portion 20, so that it can follow the reduction / expansion of the gap due to vibration, wind force, etc. after insertion. It is good and can maintain a high compressive load and exhibits an excellent function.

  In the above embodiment, in a free state where the fastener 10 is not inserted into the gap S, the first contact portion 17 contacts the inner surface of the first vertical side portion 12, and the second contact portion 18 is the second vertical side portion. 13 is formed so as not to contact the inner surface of 13 but to contact when inserted into the gap S between the sound insulating plate 4 and the groove 3. However, it may be formed so as to come into contact with the inner surface of the second vertical side portion 13 with a light force from the beginning in a free state. However, considering the ease of insertion, the former, which is not in contact in a free state, is preferable.

  The first reinforcing beads 32 formed on the first lateral side portion 14 and the second lateral side portion 15 are formed so as to protrude inward, but conversely, they may be formed so as to protrude outward. Moreover, the 1st deformation | transformation part 31 provided in this 1st reinforcement bead 32 and the 2nd vertical side part 13 may be formed not only in 1 item | strip | line but in multiple items | stripes. In particular, it is preferable to provide a plurality of reinforcing beads and deformed portions in the case where the second vertical side portion is wide.

4 Sound insulating plate 10 Fastener 11 Mounting portion 12 First vertical side portion 13 Second vertical side portion 14 First horizontal side portion 15 Second horizontal side portion 16 Third horizontal side portion 17 First contact portion 18 Second contact portion 20 Inclined side part 40

Claims (4)

In a soundproof wall comprising a rectangular sound insulating plate and a support column having a groove portion that supports the edge of the sound insulating plate, when the sound insulating plate is inserted into the groove portion of the support column, the groove portion and the sound insulating plate A leaf spring type fastener that is mounted in a gap with the end edge portion and presses the sound insulating plate against the groove portion by elastic restoring force, and extends in a substantially vertical direction, and when mounted in the gap, the thickness direction The first vertical side portion that is in contact with the surface on the gap side in the thickness direction of the sound insulating plate and the first vertical side portion that faces the first vertical side portion, and the horizontal distance between the first vertical side portion is on the upper side The upper end of the side opposite to the first vertical side in the thickness direction abuts against one side of the U-shaped cross-section groove when extending in a substantially vertical direction so as to become larger toward the gap. 2 vertical sides and the upper end of the second vertical side are connected to the first vertical side from the upper end. A first horizontal side portion that extends, and a second horizontal side that is connected to the first vertical side portion side end portion of the first horizontal side portion and extends from the end portion toward the second vertical side portion side and obliquely downward. The side is connected to the second vertical side portion side end of the second horizontal side portion, and from the end to the first vertical side portion side and the lower side, or to the second vertical side portion side and the upper side. And a connecting portion between the first horizontal side portion and the second horizontal side portion is formed as a first contact portion that can contact the inner surface of the first vertical side portion. And a second contact portion capable of contacting the inner surface of the second vertical side portion is formed between the connection portion between the second horizontal side portion and the third horizontal side portion and the third horizontal side portion. ,
An inclined side connected to the lower end of the second vertical side and extending obliquely downward from the lower end toward the first vertical side, and connected to the lower end of the inclined side, and from the lower end to the first Extending in the direction of one vertical side, and having a lower side connected to the lower end of the first vertical side,
In a state in which the clasp is mounted on the support column, the second contact portion is an inner surface of the second vertical side portion with respect to a movement in which a gap between the first vertical side portion and the second vertical side portion is narrowed. And then slips downward from the inner surface of the second vertical side portion, moves to the inner surface of the inclined side portion and slides obliquely downward, and the first vertical side portion and the second vertical side portion On the contrary, the sound insulation plate clasp of the sound insulation wall is characterized in that the second contact portion is in contact with the inner surface of the inclined side portion and is slid obliquely upward, in contrast to the movement in which the gap of the sound is widened .   The sound insulating plate fastener of the soundproof wall according to claim 1, wherein the second contact portion contacts the inner surface of the second vertical side portion and slides downward, and thereafter, the second vertical side portion and the inclined side portion. A bent portion is formed at the connecting portion between the lower end portion of the second vertical side portion and the inclined side portion so as to stop once at the boundary and then contact the inner surface of the inclined side portion and slide obliquely downward. Sound insulation plate fastener for soundproof wall, characterized by   The sound insulating plate fastener of a soundproof wall according to claim 2, wherein when the second contact portion slides on the inner surface of the inclined side portion, the contact portion between the third lateral side portion and the second lateral side portion is the above. A sound insulating plate fastener for a soundproof wall, wherein the sound insulating plate fastener is in contact with an inner surface of the inclined side portion, and a tip end portion of the third lateral side portion is not in contact with an inner surface of the inclined side portion.   The sound insulation plate fastener for a sound insulation wall according to claim 3, wherein the second lateral side portion and the third lateral side portion are provided at right angles.

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