JP2015224527A - Sound isolation device for hydraulic hammer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sound isolation device for hydraulic hammer that has a high sound isolation effect, securely prevents a sound from leaking, and is small in scale and easily usable.SOLUTION: A sound isolation device for hydraulic hammer is in a cylindrical shape that has an upper surface 1, a lower surface 2, and a side surface 3, made of steel plates respectively and formed in one body, has a sound absorber included in an inner peripheral part, and also has an opening part 1a formed in the center of the upper surface 1 and an opening part formed in the center of the lower surface 2. The sound isolation device for hydraulic hammer is used in a manner in which: the opening part 1a of the upper surface 1 is fixed to a tip part Xa of a hydraulic hammer X in a state in which the tip part Xa of the hydraulic hammer X is inserted from the opening part 1a of the upper surface 1a, and an upper end part Ya of the steel pipe pile Y is inserted slidably from the opening part of the lower surface 2 whose diameter of the opening part is larger than the external diameter of a steel pipe pile. In a cylindrical part 2b fixed to a lower side of the lower surface 2, a plurality of doughnut disk type rubber plate materials are installed which have an inner diameter smaller than the external diameter of the steel pipe pile Y and have their inner diameter-side regions curved to come into close contact with a side surface Yb of the steel pipe pile Y.

Description

  The present invention relates to a soundproofing device for a hydraulic hammer used when placing a steel pipe pile with a hydraulic hammer.

  When installing and fixing a relatively large structure (building) having a heavy weight, it is necessary to drive a pile serving as a foundation of the structure (building) to a stratum where sufficient supporting force can be obtained. In addition, as a pile, a steel pipe pile is very often used because it has strength, can be easily manufactured in a long length, and has a stable quality.

  In such steel pipe pile driving work, hydraulic hammers are used, but a large impact sound is generated due to the collision between the hydraulic hammer and the steel pipe piles, so noise around the site during construction is a problem. .

  As a measure against such noise, there is a soundproofing device that covers the entire hydraulic hammer and the part of the steel pipe pile that protrudes from the ground to block the noise to the outside. It is not possible to place the work efficiently.

  As a relatively small-sized soundproofing device that does not cover the entire hydraulic hammer, it is a soundproofing device for a hydraulic hammer that is suspended by a wire rope of a crane and has a diameter that can accommodate an engagement portion of a hydraulic hammer with a steel pipe pile. A large-diameter cylindrical tube having a sound absorbing material built in the wall portion, and a lower lid and an upper lid having a diameter of an opening through which a hydraulic hammer or a steel pipe pile can be inserted in the central portion and the sound absorbing material built in the wall portion. And a small-diameter cylindrical tube having a diameter through which a steel pipe pile can be inserted and projecting a predetermined length from the opening of the lower lid, and the large-diameter cylindrical tube and the lower lid or the upper lid A hydraulic hammer characterized in that it is brought into close contact with each other through a sound absorbing material without being fixed to each other, and each of the lower lid and the upper lid is provided with a hanging tool for hanging a supplementary winding wire rope of a crane. There is a soundproofing device (see, for example, Patent Document 1) ).

  In this soundproofing device, a large-diameter cylindrical tube is provided for housing the front end side of the hydraulic hammer instead of the whole (see FIG. 1 of Patent Document 1). However, if only the tip side of the hydraulic hammer is housed in this way, a gap is required between the opening of the large diameter cylindrical tube and the hydraulic hammer so that the hydraulic hammer can slide in the vertical direction, Therefore, there is a problem that a loud sound leaks from the gap as compared with the soundproofing device that covers the entire hydraulic hammer.

  Furthermore, in this soundproofing device, it is necessary to suspend the soundproofing device itself with a crane, which not only takes time and labor, but also the position of the soundproofing device is not stable, which may hinder the work.

JP 2010-180689 A

  In view of the above problems, an object of the present invention is to provide a soundproofing device for a hydraulic hammer that has a high soundproofing effect, reliably prevents sound leakage, and can be used easily on a small scale.

As a result of intensive studies to solve the above problems, the present inventors have
A cylindrical shape in which the upper surface, the lower surface, and the side surfaces made of steel plates are formed so as to be integrated, the sound absorbing material is included in the inner periphery, the opening is formed in the center of the upper surface, and the opening is formed in the center of the lower surface. A steel pipe pile in which the opening portion of the upper surface is fixed to the tip portion of the hydraulic hammer and the diameter of the opening portion of the lower surface is driven in a state where the tip portion of the hydraulic hammer is inserted from the opening portion of the upper surface If the soundproofing device for a hydraulic hammer that is used with the upper end of the steel pipe pile being slidably inserted from the opening on the lower surface is larger than the outer diameter of the hydraulic hammer, the soundproofing device is directly fixed to the hydraulic hammer, There is no need to hang it with a crane, etc., and furthermore, the soundproofing device can be installed at an accurate position, so that it can be constructed with high accuracy, and in the cylindrical part fixed to the lower side of the lower surface, from the outer diameter of the steel pipe pile It has a small inner diameter and the inner diameter side is curved. If a plurality of donut disk-shaped rubber plates are installed so as to be in close contact with the side surface of the steel pipe pile, sound leaks to the outside by closing the gap between the opening on the lower surface and the steel pipe pile with the rubber plate material. The present invention has been completed by investigating that the use of a plurality of rubber plate members can improve the soundproofing effect by providing a rubber layer and an air layer between the rubber plate members.

That is, in the present invention, the upper surface, the lower surface and the side surface made of a steel plate are formed so as to be integrated, the sound absorbing material is included in the inner peripheral portion, the opening portion is in the center of the upper surface, and the opening portion is in the center of the lower surface. The formed upper surface is fixed to the tip of the hydraulic hammer with the tip of the hydraulic hammer inserted from the opening of the upper surface, and the diameter of the opening of the lower surface is struck. It is a soundproofing device for a hydraulic hammer that is used by being slidably inserted into the upper end of the steel pipe pile from the opening of the lower surface that is larger than the outer diameter of the steel pipe pile to be installed,
A donut having a smaller inner diameter than the outer diameter of the steel pipe pile in a cylindrical portion fixed to the lower side of the lower surface, and a portion on the inner diameter side being curved so as to be in close contact with the side surface of the steel pipe pile A soundproofing device for a hydraulic hammer, wherein a plurality of disk-shaped rubber plate members are provided.

  If the rubber plate is detachably installed in the cylindrical portion, it is preferable that the rubber plate can be easily replaced even when the rubber plate is deteriorated. Further, it is suspended so as to cover the steel pipe pile below the cylindrical portion. If the soundproofing sheet is further provided, it is preferable that noise directly resounding from the cylindrical steel pipe pile can be easily prevented.

  The soundproofing device for a hydraulic hammer according to the present invention is formed such that an upper surface, a lower surface, and a side surface made of a steel plate are integrated with each other, a sound absorbing material is included in an inner peripheral portion, and an opening is formed in the center of the upper surface. It has a cylindrical shape with an opening formed at the center of the bottom surface, and the top opening is fixed to the tip of the hydraulic hammer with the tip of the hydraulic hammer inserted from the top opening. This is a hydraulic hammer soundproofing device that is used by sliding the upper end of the steel pipe pile slidably from the opening on the lower surface, which is larger than the outer diameter of the steel pipe pile to be placed, and is fixed to the lower side of the lower surface. A plurality of donut disk-like rubber plates are installed in the cylindrical portion, which have an inner diameter smaller than the outer diameter of the steel pipe pile and are attached so that the inner diameter side portion is curved and is in close contact with the side surface of the steel pipe pile. From, the soundproofing device is directly fixed to the hydraulic hammer Therefore, it is not necessary to hang it with a crane, etc., and furthermore, the soundproofing device can be installed at an accurate position, so that high-precision construction can be performed, and the gap between the opening on the lower surface and the steel pipe pile is closed by a rubber plate. Not only can the sound be prevented from leaking, but also by using a plurality of rubber plate materials, the soundproofing effect can be improved by providing a rubber layer and an air layer between the rubber plate materials.

  Moreover, in the aspect in which the rubber plate material is detachably installed in the cylindrical portion, it is preferable that the rubber plate material can be easily replaced even when the rubber plate material is deteriorated, and is hung so as to cover the steel pipe pile below the cylindrical portion. In the aspect in which the soundproof sheet is further provided, it is preferable that noise directly resounding from the cylindrical steel pipe pile can be easily prevented.

It is side explanatory drawing which shows one Example of the soundproofing apparatus for hydraulic hammers which concerns on this invention. It is a perspective explanatory view of the soundproof device for hydraulic hammer of FIG. FIG. 2 is an enlarged cross-sectional explanatory view of a part A of the hydraulic hammer soundproofing device of FIG. 1. It is side explanatory drawing which shows the other Example of the soundproof apparatus for hydraulic hammers which concerns on this invention.

  Hereinafter, the soundproofing device for a hydraulic hammer according to the present invention will be described in detail with reference to the drawings.

  X is a hydraulic hammer, and Y is a steel pipe pile driven by the hydraulic hammer X.

  Reference numeral 1 denotes a steel plate upper surface, and the opening 1a of the hydraulic hammer X is inserted into the through hole 5 described later from the opening 1a of the upper surface 1 so that the opening 1a of the upper surface 1 is the tip Xa of the hydraulic hammer X. It is fixed to.

  2 is a lower surface made of steel plate, and the diameter of the opening 2a of the lower surface 2 is larger than the outer diameter of the steel pipe pile Y to be placed, and the upper end Ya of the steel pipe pile Y is slidably inserted from the opening 2a of the lower surface 2 Is done.

  Reference numeral 3 denotes a side surface made of a steel plate. The side surface 3 is formed so as to be integrated with the upper surface 1 and the lower surface 2 described above, and the sound absorbing material 4 is included in the inner peripheral portion.

  5 is a donut disk-like rubber plate that has an inner diameter smaller than the outer diameter of the steel pipe pile Y and is mounted so that a portion on the inner diameter side is curved and is in close contact with the side surface Yb of the steel pipe pile Y. A plurality of cylinders 2b are fixed to the side. When the rubber plate 5 is detachably installed in the cylindrical portion 2b, it is preferable that the rubber plate 5 can be easily replaced even when the rubber plate 5 is deteriorated.

  6 is a soundproofing sheet that hangs down below the cylindrical portion 2b so as to cover the steel pipe pile Y. If this soundproofing sheet 6 is further provided, the noise directly reflected from the cylindrical steel pipe pile Y can be easily simplified. It is preferable that it can be prevented.

  In order to actually use the soundproofing device for a hydraulic hammer according to the present invention, first, the opening 1a of the upper surface 1 made of steel plate is fixed to the tip portion Xa of the hydraulic hammer X, whereby the hydraulic hammer according to the present invention. In addition to fixing the soundproofing device to the hydraulic hammer X, sound leakage from the opening 1a of the upper surface 1 can be reliably prevented. In addition, welding to the upper surface 1 is preferable for fixing to the hydraulic hammer X.

  Next, in such a state that the upper surface 1 is fixed to the hydraulic hammer X, the steel pipe pile Y to be driven from the opening 2a of the lower surface 2 is inserted so that the steel pipe pile Y can be started to be driven. At this time, for example, if a step is provided in the tip portion Xa of the hydraulic hammer X and the tip is tapered, the tip of the hydraulic hammer X is inserted into the pipe of the steel pipe pile Y, and the step between the upper surface of the steel pipe pile Y and the hydraulic hammer X It is possible to apply the hammering force of the hydraulic hammer X to the steel pipe pile Y by bringing it into contact with the portion.

  Further, since the steel pipe pile Y is gradually embedded into the ground by the hammering force of the hydraulic hammer X, the rubber plate member 5 is bent in a state where the inner diameter side portion is rolled up and curved as shown in FIG. It is in close contact with the side surface Yb.

  And by making such a rubber plate material 5 contact a plurality of side surfaces Yb of the steel pipe pile Y, the gap between the opening 2a of the lower surface 2 and the steel pipe pile Y is closed with the rubber plate material 5, and sound leaks to the outside. Not only can this be prevented, but by using a plurality of rubber plate members 5, an air layer is formed between the rubber plate member 5 and the rubber plate member 5. Therefore, the sound volume is reduced and a high sound insulation effect is obtained.

  In addition, since such a rubber plate material 5 is easily deteriorated when the placing work of the steel pipe pile Y is repeated, replacement is necessary.

  Therefore, if the rubber plate 5 is detachably installed in the cylindrical portion 2b of the lower surface 2, it is preferable that the rubber plate 5 can be easily replaced and the workability is improved.

  In addition, the steel pipe pile Y is not only noise from the upper end receiving impact force by the hydraulic hammer X, but also because the steel pipe pile Y is formed of a steel material with a cylindrical shape, a loud noise is also generated from the intermediate part protruding above the ground. Therefore, if the soundproof sheet 6 is provided to hang down below the cylindrical portion 2b so as to cover the steel pipe pile Y, it is possible to reliably prevent loud noises resonating from the middle portion of the steel pipe pile Y, etc. This is preferable because the prevention effect is improved.

X Hydraulic hammer
Xa Tip Y Steel pipe pile
Ya top edge
Yb Side 1 Top
1a Opening 2 Lower surface
2a opening
2b Cylindrical part 3 Side 4 Sound absorbing material 5 Rubber plate 6 Soundproof sheet

Claims (3)

Each of the upper surface (1), the lower surface (2) and the side surface (3) made of steel plate is formed so as to be integrated, and the sound absorbing material (4) is included in the inner peripheral portion, and the upper surface (1) is opened at the center. The portion (1a) has a cylindrical shape with an opening (2a) formed at the center of the lower surface (2), and the tip (Xa) of the hydraulic hammer (X) extends from the opening (1a) of the upper surface (1). The opening (1a) of the upper surface (1) is fixed to the tip portion (Xa) of the hydraulic hammer (X) with the diameter of the opening (2a) of the lower surface (2) inserted. The soundproofing for hydraulic hammer that is used with the upper end (Ya) of the steel pipe pile (Y) slidably inserted from the opening (2a) of the lower surface (2) that is larger than the outer diameter of the steel pipe pile (Y) A device,
The cylindrical portion (2b) fixed to the lower side of the lower surface (2) has an inner diameter smaller than the outer diameter of the steel pipe pile (Y), and a portion on the inner diameter side thereof is curved so that the steel pipe pile ( A soundproofing device for a hydraulic hammer, wherein a plurality of donut disc-like rubber plate members (5) mounted so as to be in close contact with the side surface (Yb) of Y) are installed.   The soundproofing device for a hydraulic hammer according to claim 1, wherein the rubber plate (5) is detachably installed in the cylindrical part (2b).   The soundproofing device for hydraulic hammers according to claim 1 or 2, further comprising a soundproofing sheet (6) suspended below the cylindrical part (2b) so as to cover the steel pipe pile (Y).

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