JP2012002049A - Leaf spring type fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fastener for which load resistance is increased and a retaining property is improved, in the fastener of a type for which the gap of a groove whose cross section is U shaped is narrow and lower ends of a first vertical side part and a second vertical side part are directly connected to each other.SOLUTION: A first contact part 17 which is the connection part of a first horizontal side part 14 and a second horizontal side part 15 can be brought into contact with the inner surface of the first vertical side part 12, and a second contact part 18 which is the connection part of the second horizontal side part and a third horizontal side part 16 can be brought into contact with the inner surface of the second vertical side part 13. Near a position at which the second contact part is brought into contact with the inner surface of the second vertical side part, a projected wall part 20 projected toward the outer side at the second vertical side part is provided.

Description

The present invention relates to a leaf spring type fastener for fixing a sound insulation plate in a soundproof 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 fastener is mounted in the gap between the sound insulating plate and the one side surface of the U-shaped groove, and the sound insulating plate is moved to the other side surface of the U-shaped groove by the elastic restoring force of the fastener. To be fixed by being pressed.

Such a fastener extends substantially in the vertical direction, and when mounted in the gap, a first vertical side portion 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 mounted in the gap, the first length in the thickness direction is provided so that the horizontal distance between the first vertical side and the first vertical side increases toward the upper side. An upper end of the side opposite to the vertical side is provided with a second vertical side that abuts against one side of the U-shaped groove. In the type in which the gap of the U-shaped groove is narrow, the lower ends of the first vertical side and the second vertical side are directly connected to each other (Patent Document 1). On the other hand, in the type in which this gap is wide, the lower ends of the first vertical side and the second vertical side are connected by a connecting side (Patent Document 2).

In the sound insulating plate fastener of the type in which the lower ends of the first vertical side and the second vertical side are directly connected as in Patent Document 1, the first vertical side and the second vertical side In between, the first horizontal side portion connected to the upper end portion of the second vertical side portion and extending from the upper end portion toward the first vertical side portion side, and the first vertical side portion side end portion of the first horizontal side portion And a second horizontal side portion that is connected and extends from the end portion toward the second vertical side portion and downward, and the connection portion between the first horizontal side portion and the second horizontal side portion serves as a contact portion. It is provided in contact with the inner surface of the first vertical side. In this fastener, in a free state before being inserted into the groove portion, the horizontal distance between the lower end portions of the first vertical side portion and the second vertical side portion is set to be smaller than the gap, but between the upper end portions. The horizontal distance is set larger than the gap. The contact portion is in contact with the inner surface of the first vertical side portion or slightly separated.

When the fastener is mounted, the first vertical side portion of the first vertical side portion and the lower end portion of the second vertical side portion are inserted into the gap, and the first vertical side portion is hit by hitting the fastener with a hammer or the like from above. And the upper end part of a 2nd vertical side part is bent in the direction which mutually approaches, and it inserts in the clearance gap between the said sound insulating board and a cross-sectional U-shaped groove. When inserted further into the back, the upper end of the first vertical side is in contact with the inner surface of the sound insulation plate, and the upper end of the second vertical side is in contact with one side surface of the U-shaped groove in cross section. The upper ends of the first vertical side and the second vertical side are narrowed, and the contact portion between the first horizontal side and the second horizontal side contacts the inner surface of the first vertical side and slides downward, and the first The vertical side portion is pressed against the sound insulating plate, and the second vertical side portion is pressed against one side surface of the U-shaped groove.

Japanese Utility Model Publication No. 61-50109 JP 2008-190220 A

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 fastener of Patent Document 1 has insufficient load resistance, and it is necessary to double the load resistance applied to the fastener. Yes.
Considering simply, it is conceivable to increase the thickness of the sound insulating plate fastener to increase the load resistance, but there is a problem that the cost increases and the weight increases.

As one of the solution methods for improving the load resistance, it is conceivable to apply a configuration adopted in a fastener having a wide gap between the U-shaped cross sections. That is, as shown in Patent Document 2, in addition to the first contact portion between the first lateral side portion and the second lateral side portion, a second contact portion is provided from the second lateral side portion to the third lateral side portion. The first contact portion is in contact with the inner surface of the first vertical side portion, and the second contact portion is in contact with the inner surface of the second vertical side portion. With such a configuration, load resistance is increased. Moreover, in this patent document 2, it is set as the structure which is provided with the protrusion wall part which protruded toward diagonally downward from the inner surface of a 2nd vertical side part, and also increases load resistance.

In such a type, when the fastener is inserted into the gap, each contact portion becomes a resistance, so that there is a concern that the insertion resistance increases and the workability decreases. However, in this Tio, not only the first vertical side portion and the second vertical side portion, but also the first horizontal side portion can be directly struck with a hammer or the like and pushed into the back. It doesn't matter so much.

However, as in Patent Document 1, in a clasp having a narrow gap between the U-shaped cross sections, the first horizontal side portion cannot be inserted by directly hitting it with a hammer or the like. In addition, since the fastener is inserted by hitting the upper end of the second vertical side portion 2, there is a concern that the workability is inferior.

Therefore, insertion resistance becomes a problem in work. Further, when the second contact portion is pressed against the inner surface of the second vertical side portion, the portion of the second vertical side portion that contacts the second contact portion is strongly pressed against one side surface of the U-shaped groove, and as a result The upper end portion of the second vertical side portion is likely to be separated from one side surface of the U-shaped groove, so that it becomes a so-called substantially arc-shaped cross section, and the pressing force may be weakened on the contrary, or it is easy to come out by coming off. There is a tendency.

The present invention is a type of fastener in which the gap between the U-shaped grooves is narrow and the lower ends of the first vertical side and the second vertical side are directly connected to each other. It aims at providing the fastener which improved the property.

In order to achieve the above object, the invention of claim 1 is characterized in that a U-shaped groove having a cross-section formed in the lengthwise direction of the struts on the opposing surfaces of a pair of struts erected at a predetermined interval. The sound insulation plate is mounted in a gap between the opposing U-shaped grooves with a thickness smaller than the groove width of the U-shaped groove and fitted with the sound insulation plate. A leaf spring type fastener that presses against the other side surface of the letter-shaped groove, and extends substantially in the vertical direction, and when attached to the gap, one surface in the thickness direction is the thickness direction of the sound insulating plate in the thickness direction. A first vertical side that is in contact with the surface on the gap side, and the first vertical side that faces the first vertical side and extends in a substantially vertical direction so that a horizontal distance between the first vertical side and the first vertical side increases upward. The first vertical side in the thickness direction when the portion is connected to the lower end of the first vertical side and is mounted in the gap The upper end of the side opposite to the first vertical side is connected to the second vertical side that abuts against one side of the U-shaped groove, and the upper end of the second vertical side. A first horizontal side portion extending toward the side, and a 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 and downward. A second horizontal side portion and 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. 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 the second horizontal side portion and the above-mentioned The connection portion with the third horizontal side portion is formed as a second contact portion that can contact the inner surface of the second vertical side portion, and in the vicinity of the position where the second contact portion contacts the inner surface of the second vertical side portion. , Outside from the outer surface of the second vertical side A protruding wall portion that protrudes toward the inner surface, and when the second contact portion contacts the inner surface of the second vertical side portion, the protruding wall portion is pressed against the side surface of the U-shaped groove in cross section. It is characterized by that.

According to a second aspect of the present invention, in the leaf spring type fastener of the soundproof wall according to the first aspect, the projecting wall portion is integrally formed by deforming a part of the second vertical side portion projecting outward. It is characterized by being formed.

According to a third aspect of the present invention, in the leaf spring type fastener of the soundproof wall according to the first or second aspect, the length of the lateral side portion is the first lateral side portion, the second lateral side portion, and the In a free state before the fastener is inserted into the groove, the second lateral side portion is arranged to extend downward, and the third lateral side portion becomes shorter in order of the third lateral side portion. The side portion is arranged to extend toward the inner surface of the first vertical side portion.

According to a fourth aspect of the present invention, in the leaf spring type fastener of the soundproof wall according to the third aspect, in the free state before the fastener is inserted into the groove, the first lateral side portion and the second lateral portion are provided. The lower end portion of the third horizontal side portion is arranged closer to the inner surface of the first vertical side portion than the first contact portion with the horizontal side portion.

In the first aspect of the invention, when the fastener is mounted in the gap between the sound insulation plate and the column, the lower portion of the first vertical side and the second vertical side of the fastener is inserted into the gap, and further forced The first vertical side portion and the second vertical side portion are narrowed as the first vertical side portion is inserted, the first contact portion comes into contact with the inner surface of the first vertical side portion, and the second contact portion becomes the second vertical side. As the first contact portion slides downward on the inner surface of the first vertical side portion and the second contact portion slides downward on the inner surface of the second vertical side portion as it contacts the inner surface of the portion and further inserts. At this time, since the second contact portion presses the inner surface of the second vertical side portion against the inner surface of the groove portion, the protruding wall portion is firmly pressed against the inner surface of the groove portion, and the retaining effect can be enhanced.
Since the first contact portion is pressed against the inner surface of the first vertical side portion and the second contact portion is pressed against the inner surface of the second vertical side portion, the load at the time of compression of the fastener is large, and as an elastic restoring force Is strong and has improved load resistance.

In the invention of claim 2, since the protruding wall portion is formed integrally with the second vertical side portion, the deformation resistance of the protruding wall portion is excellent.

In the invention of claim 3, when the fastener is inserted into the gap, the lower end portion of the third horizontal side portion contacts the inner surface of the first vertical side portion, so that the second contact portion is directed toward the inner surface of the second vertical side portion. The insertion is smooth and the slip resistance is very low.

In the invention of claim 4, when the fastener is inserted, the lower end portion of the third horizontal side portion contacts the inner surface of the first vertical side portion earlier than the first contact portion contacts the inner surface of the first vertical side portion. By doing so, since the second contact portion is directed toward the inner surface of the second vertical side portion, the insertion is smooth. In addition, in a free state, the lower end portion of the third horizontal side portion is arranged closer to the inner surface of the first vertical side portion than the first contact portion, so that it is strong as a fastener. Spring property can be given. In addition, the lower end of the third horizontal side is a released end and slides smoothly, and the lower end of the third horizontal side is farthest from the upper end of the second vertical side. There is also a merit that the portion hardly acts in a direction away from the inner surface of the groove portion.

It is sectional drawing which shows the sound-insulation wall in which the sound-insulation board fastener which concerns on Embodiment 1 of this invention was provided. It is an AA line cross-sectional enlarged view of FIG. 1 is a schematic perspective view of a fastener according to Embodiment 1 of the present invention. FIG. 1. It is related with Embodiment 1 of this invention, and is the elements on larger scale of FIG. FIG. 5 is a partially enlarged view of FIG. 4 according to Embodiment 1 of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
1 to 5 relate to Embodiment 1 of the present invention and show an example in which a fastener is applied to a sound insulation plate of a sound insulation wall. As shown in FIG. 1, a soundproof wall 1 provided with a fastener 10 is shown, and the soundproof wall 1 is predetermined in a direction along the automobile road on both sides of the automobile road (a direction perpendicular to the paper surface of FIG. 1). A plurality of support columns 2, 2,... Each of the columns 2 is made of H-shaped steel, and has two groove portions 3 and 3 having a U-shaped cross section extending in the length direction of the column 2, and the openings of the grooves 3 are along the automobile road. It is erected so as to face the direction (the length direction of the soundproof wall 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. ing. 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 5 is stuck and fixed to the side opposite to the automobile road 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 of the groove 3 opposite to the motor road, the sound insulating plate 4 is placed on the side of the groove 3 on the side of the motor road by elastic restoring force. A leaf spring type sound insulating plate fastener 10 that is pressed and 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. In addition, a stepped portion 4a that is recessed downward is formed on the side of the automobile road at the upper end of each of the sound insulation plates 4, and this sound insulation is provided between the stepped portion 4a and the side surface of the groove 3 on the side of the automobile road. The convex part 4b provided in the lower end part of the sound insulation board 4 piled up right above the board 4 is inserted, and the movement to the thickness direction of the lower end part of the sound insulation board 4 is controlled by this. It is like that.

Specifically, as shown in FIG. 3, when the fastener 10 is mounted in the gap S, the lower surface 10 abuts the upper end surface of the sound insulating plate 4 and the upper end surface protrudes from the upper end surface. An attachment side portion 11 having a fitting hole 11a that substantially fits with the provided fitting portion 4c (see FIG. 2) having a circular cross section is provided.
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 against 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. ing.

At the lower end portion of the first vertical side portion 12, a second vertical length that extends substantially in the vertical direction is opposed to the first vertical side portion 12 and the horizontal distance from the first vertical side portion 12 increases upward. The lower end portion of the side portion 13 is directly connected. The upper end of the side opposite to the first vertical side 12 (the side opposite to the automobile road) in the thickness direction of the second vertical side 13 is the automobile of the groove 3 when the fastener 10 is mounted in the gap. It comes in contact with the side opposite to the road.

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 downward. A second horizontal side portion 15 extending downward from the end portion is connected to the lower end portion of the first vertical side portion 12 of the first horizontal side portion 14. Connected to the lower end of the second horizontal side 15 is a third horizontal side 16 extending from the end toward the first vertical side 12 and downward. A connecting portion between the first horizontal side portion 14 and the second horizontal side portion 15 is provided with a first contact portion 17 that can contact the inner surface of the first vertical side portion 12. A second contact portion 18 that can contact the inner surface of the second vertical side portion 13 is provided at a connection portion with the third horizontal side portion 16. The first contact portion 17 and the second contact portion 18 are formed in a smooth curved cross-sectional shape.
A projecting wall portion 20 is formed at a position slightly below the middle of the second vertical side portion 13 toward the outside (side surface direction opposite to the automobile road of the U-shaped groove 3 in cross section). The protruding wall portion 20 is formed with an inclined wall portion 21 that protrudes greatly toward the outside gradually upward. The inclined wall portion 21 is smoothly and integrally connected to the inner surface of the second vertical side portion 13, and is inclined.
The protruding wall portion 20 prevents the fastener 10 from coming out of the gap S due to vibration or the like.

Specifically, the situation when the fastener 10 is inserted into the gap S will be described. In the first embodiment, as shown in FIG. 3, 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 of using a state floating from the inner surface of the side portion 13. When the fastener 10 is inserted into the gap S and the upper ends of the first vertical side portion 12 and the second vertical side portion 13 are struck with a hammer or the like and inserted further into the back, the first vertical side portion 12 and the second vertical side portion 12 The space | interval with the vertical side part 13 becomes narrow, and the 2nd contact part 18 first contacts and slides on the inner surface of a 1st vertical side part.
Accordingly, the second contact portion 18 comes into contact with the inner surface of the second vertical side portion.
The first contact portion 17 contacts the inner surface of the first vertical side portion and slides downward, and the second contact portion 18 contacts the inner surface of the second vertical side portion and slides downward. Since the first contact portion 17 and the second contact portion 18 act so as to push the first vertical side portion 12 and the second vertical side portion 13 in the direction in which the first contact portion 17 and the second contact portion 18 are expanded, the compression load of the fastener 10 is reduced. To increase. As a result, the restoring force of the fastener 10 is strengthened.

Moreover, it can prevent effectively that the 1st vertical side part 12 and the 2nd vertical side part 13 incline.
Further, when the second contact portion 18 contacts the inner surface of the second vertical side portion and acts to press the second vertical side portion against the side surface of the groove portion 3, the protruding wall portion 20 is pressed against the side surface of the groove portion 3. Thus, the protruding wall portion 20 formed on the second vertical side portion is pressed so as to bite into the inner surface of the groove portion 3 and is difficult to come off.

In addition, although it is preferable to arrange | position the 2nd contact part in the position which presses a protrusion wall part directly, as long as the retaining function can be exhibited, you may be the position which presses the vicinity of a protrusion wall part.
In the above embodiment, in a free state where the fastener 10 is not inserted into the gap S, the first contact portion 17 does not contact the inner surface of the first vertical side portion 12, and the second contact portion 18 does not contact the second vertical portion. It is formed so as not to contact the inner surface of the side portion 13 but to contact when being inserted into the gap S between the sound insulating plate 4 and the groove portion 3. However, it may be formed such that at least one of the first contact portion 17 and the second contact portion 18 contacts the inner surface of the vertical side portion 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.
A reinforcing bead may be formed on the first lateral side portion 14 and the second lateral side portion 15 to be reinforced.

The present invention is used for a soundproof wall used for a side wall of a road, a partition wall of an opposite lane, and the like, and can be applied to a leaf spring type fastener for fixing a sound insulating plate of the soundproof wall.

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 Protruding wall

Claims (4)

A cross-sectional U-shaped groove formed in the opposing direction of a pair of struts erected at a predetermined interval extending in the length direction of the strut, and a U-shaped cross-section between the opposing U-shaped grooves A leaf spring type fastener that is mounted in a gap with a sound insulation plate that is set to have a thickness smaller than the groove width of the groove and that presses the sound insulation plate against the other side surface of the U-shaped groove in an elastic restoring force Because
A first vertical side portion that extends substantially in the vertical direction and has one surface in the thickness direction contacting the surface on the gap side in the thickness direction of the sound insulating plate when mounted in the gap, and the first vertical side portion The lower end is connected to the lower end of the first vertical side and is mounted in the gap. A second vertical side portion in which the upper end portion of the side surface opposite to the first vertical side portion in the thickness direction is in contact with one side surface of the U-shaped groove,
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, and an end of the first horizontal side on the first vertical side Connected to the second horizontal side portion extending from the end portion toward the second vertical side portion and downward, and to the second vertical side portion end portion of the second horizontal side portion, A third horizontal side portion extending from the end portion toward the first vertical side portion side and downward, 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 the second horizontal side portion and the third horizontal side are formed. The connecting portion with the portion is formed as a second contact portion that can contact the inner surface of the second vertical side portion,
In the vicinity of the position where the second contact portion comes into contact with the inner surface of the second vertical side portion, a protruding wall portion is formed that protrudes outward from the outer surface of the second vertical side portion,
The soundproof wall plate, wherein the protruding wall portion is pressed against the side surface of the U-shaped groove in cross section when the second contact portion contacts the inner surface of the second vertical side portion. Spring clamp. The leaf spring type fastener for a soundproof wall according to claim 1, wherein the protruding wall portion is integrally formed by projecting and deforming a part of the second vertical side portion outward. A sound-proof wall spring-type fastener. The leaf spring type fastener of the soundproof wall according to claim 1 or 2, wherein the length of the lateral side is in the order of the first lateral side, the second lateral side, and the third lateral side. In a free state before the fastener is inserted into the groove, the second lateral side portion is extended downward and the third lateral side portion is the first longitudinal side. A leaf spring type fastener for a soundproof wall, characterized by being arranged to extend toward the inner surface of the side portion. The leaf spring type fastener of the soundproof wall according to claim 3, wherein the first lateral side portion and the second lateral side portion are in a free state before the fastener is inserted into the groove. A leaf spring type fastener for a soundproof wall, wherein a lower end portion of the third horizontal side portion is arranged closer to an inner surface of the first vertical side portion than the contact portion.

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