JP2018188809A - Soundproof wall for construction work site - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a soundproof wall for a balloon-type construction work site which reduces scattering of generated dust into an external space in a work space not subjected to restriction in a height direction.SOLUTION: A bag body 11 bulges due to the gas injected by an air compressor 8 and forms a wall body rising upward from the installation position between a work space S1 and an external space S2. The bag body 11 is held in an upright state by a rope 12 hooked on a peg 7 attached to the ground. A plurality of ejection ports 112 are provided at predetermined intervals, for example, on the line slightly closer to the work space S1 than the ridge line of the bag body 11 in an upright state, and the gas ejected from the ejection ports 112 forms an air curtain AC. The bag body 11 containing the gas therein attenuates the volume of the noise generated in the work space S1 and directed toward the external space S2. The air curtain AC regulates the movement of dust generated in the work space S1 and directed toward the external space S2. As a result, sound insulation and dust prevention in the external space S2 are realized.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a technique for reducing diffusion of noise generated in civil engineering construction work.

  In order to reduce the diffusion of noise generated in civil engineering construction work to nearby residential areas, noise barriers are placed between the construction area and the outside of the construction area. In many cases, the construction machine, which is a main noise generation source, moves sequentially as the construction progresses, so it is desirable that the soundproof wall be easy to assemble, dismantle and transport.

  As a soundproof wall that can be easily assembled, disassembled and transported, there is a balloon-type soundproof wall. The balloon-type soundproof wall is a wall constructed by inflating a bag by injecting air with an air compressor. As a patent document disclosing a balloon type soundproof wall, for example, there is Patent Document 1. A balloon-type soundproof wall (simple balloon shelter) described in Patent Document 1 is connected to two long base members arranged in parallel in a direction along the ground with a space therebetween, and to each of these base members. And having a cover member arranged vertically. The two cover members are connected to each other on the upper side, and form a right side wall portion, a left side wall portion, and a roof portion spanned between the upper edges of the side wall portions in the extending direction of the wall body.

  The base member and the cover member described in Patent Document 1 are formed by a balloon that is inflated by air injection. Therefore, the simple balloon shelter described in Patent Document 1 can be easily assembled and disassembled by injecting air into the balloon and discharging air from the balloon, and is easy to convey because it is lightweight.

JP 2006-63588 A

  Since the simple balloon shelter described in Patent Document 1 has a roof portion that shields the upper side of the work space in addition to the side wall portion that shields the side of the work space, dust generated in the work space is scattered to the external space. There is a merit that it is reduced. On the other hand, there is a demerit that the operation in the height direction of the work equipment used in the work space is restricted by the roof portion.

  In view of the above circumstances, an object of the present invention is to provide a balloon-type soundproof wall that reduces scattering of dust generated in a work space that is not restricted in the height direction to an external space.

  In order to achieve the above object, the present invention forms a wall body that swells by an injected gas and rises upward from the installation position, and blows out the injected gas to the side or above the wall body. A soundproof wall provided with a flexible bag-like body having a spout forming a curtain is proposed as a first aspect.

  According to the balloon-type soundproof wall according to the first aspect, dust generated in the work space that is not restricted in the height direction is scattered by the air curtain to the external space through the opening above the work space. Inconvenience is reduced.

  In addition, the soundproof wall according to the first aspect described above may include a relief valve that regulates the flow of gas passing through the jet port as the second aspect of the present invention.

  According to the soundproof wall according to the second aspect, it is possible to switch whether or not the gas from the ejection port is ejected depending on whether or not the gas is injected into the bag body. In addition, when the gas injection is stopped after the gas injection into the bag body is completed, the gas does not leak from the ejection port, so that the formed wall body is maintained.

  Further, in the soundproof wall according to the first or second aspect described above, a configuration in which a nozzle that restricts an outflow direction of the gas ejected so that the gas ejected from the ejection port forms a belt shape is provided. The third aspect may be adopted.

  According to the soundproof wall according to the third aspect, by providing the nozzle, the amount of gas required for forming the air curtain is reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the balloon type soundproof wall which reduces the scattering to the external space of the dust which generate | occur | produces in the working space which does not receive the restriction | limiting in a height direction is provided.

The side view of the soundproof wall which concerns on one Embodiment. The top view of the soundproof wall concerning one embodiment. The figure which showed the state by which the bag which concerns on one Embodiment was wound up. The figure which showed the state which the bag body which concerns on one Embodiment expand | deployed by gas injection | pouring. The figure which showed the state which the bag which concerns on one Embodiment withered by discharge | emission of gas. The side view of the soundproof wall which concerns on one modification. The top view of the nozzle which concerns on one modification. The front view of the nozzle which concerns on one modification. The side view of the soundproof wall which concerns on one modification. The top view of the soundproof wall which concerns on one modification. The top view of the nozzle which concerns on one modification. The front view of the nozzle which concerns on one modification.

  A soundproof wall 1 according to an embodiment of the present invention will be described below. FIG. 1 is a side view of the soundproof wall 1 installed on the boundary line between the work space S1 and the external space S2 adjacent to the work space S1. FIG. 2 is a plan view of the soundproof wall 1.

  FIG. 2 illustrates a state in which a plurality of soundproof walls 1 are arranged in a straight line. The number of the sound barriers 1 arranged side by side, the shape drawn by the plurality of sound barriers 1 in the plan view, and the like may be variously changed depending on the size and shape of the work space S1.

  In the following description, the extension direction of the soundproof wall 1 is the X direction (the positive direction is the direction from the top to the bottom in FIG. 2), the direction from the work space S1 to the external space S2 is the Y direction, and the vertical direction is the Z direction ( The positive direction is the direction from bottom to top).

  The soundproof wall 1 includes a bag body 11 that is a flexible bag-like body, a plurality of ropes 12, and a universal metal fitting 13 attached to each of the plurality of ropes 12. The bag 11 is a member obtained by molding a flexible sheet material so that a wall is formed by injecting gas. The bag 11 is inflated by the injected gas, and stands up from the installation position (in the example of FIGS. 1 and 2, a predetermined position on the intersection of the boundary surface between the work space S1 and the external space S2 and the ground). It is held by a plurality of ropes 12 and forms a wall body.

  Therefore, the bag body 11 has an inlet 111 that is an opening for receiving the injected gas. The other end of the air hose 9 connected to one end of the air compressor 8 is connected to the inlet 111. That is, the gas having a pressure higher than the atmospheric pressure sent from the air compressor 8 reaches the inlet 111 through the air hose 9 and then is sent into the bag body 11 to inflate the bag body 11.

  The bag body 11 has a plurality of spouts 112 arranged, for example, at a predetermined interval on a line slightly closer to the work space S1 than the ridgeline in a state where a wall is formed by injecting gas. The spout 112 is an opening through which the gas at a pressure higher than the atmospheric pressure injected from the air compressor 8 into the bag body 11 is vigorously ejected to the outside of the bag body 11. The gas ejected from the ejection port 112 forms an air curtain AC on the side or above the bag body 11.

  In the example of FIG. 1, the air curtain AC is formed on a plane rotated upward by 45 degrees toward the work space S <b> 1 with the straight line as an axis, extending upward from the straight line where the plurality of jet nozzles 112 are arranged. . However, the inclination of the air curtain AC is not limited to that illustrated in FIG.

  One end of a part of the plurality of ropes 12 is attached to the side surface of the bag body 11 on the working space S1 side, and the other ropes 12 are arranged on the side surface of the bag body 11 on the outer space S2 side. The end of is attached. Moreover, the edge part of the side which is not attached to each bag body 11 of the some rope 12 passes through the some hole which the universal metal fitting 13 has, and is tied by the ball shape. Therefore, an annular portion is formed on the side of the rope 12 that is not attached to the bag body 11. The length of the rope 12 is adjusted by the free metal fitting 13 in a state where the annular portion is hooked on the hook of the head of the peg 7 attached to the ground, and the bag body 11 in a state where it stands up with an appropriate tension. Hold.

  The bag body 11 of the soundproof wall 1 having the above-described configuration has a volume of noise (schematically indicated by an arrow N in FIG. 1) generated in the work space S1 and directed to the external space S2 in a state where gas is accommodated therein. Attenuate. Further, the air curtain AC formed by the gas ejected from the ejection port 112 by the soundproof wall 1 having the above-described configuration is generated in the work space S1 and is directed to the external space S2 through the opening above the work space S1 (FIG. 1). In FIG. 5A), and the amount of dust reaching the external space S2 is reduced.

  Then, the process at the time of an operator installing, moving, and removing the soundproof wall 1 is demonstrated. FIG. 3 is a view showing the bag body 11 in a state where almost all of the internal gas is discharged, wound up around the axis in the extending direction, and disconnected from the air hose 9. In addition, illustration of the rope 12 and the universal metal fitting 13 is abbreviate | omitted in FIG. The bag 11 is stored or transported in the state shown in FIG. After installing the bag body 11 in the state of FIG. 3 at the installation position, the operator connects the air hose 9 to the injection port 111 and starts injecting gas into the bag body 11 by the air compressor 8.

  FIG. 4 shows a state in which the bag 11 in the state shown in FIG. 3 is unfolded when gas is fed from the air compressor 8 and rolled up. In FIG. 4, the rope 12 and the universal bracket 13 are not shown. The operator raises the bag 11 in the state shown in FIG. 4 on the installation position, and then hooks the annular portion of the rope 12 on the peg 7 previously attached to the ground to move the position of the universal bracket 13. Then, the tension of the rope 12 is adjusted. Thereby, the installation of the soundproof wall 1 is completed, and the state shown in FIG. 1 is obtained.

  In this embodiment, the bag body 11 can maintain the shape of the standing wall body while the gas injection by the air compressor 8 is continued. When the operation of the air compressor 8 is stopped and gas is no longer injected into the bag body 11, the gas in the bag body 11 leaks out from the ejection port 112, and the bag body 11 is gradually deflated. FIG. 5 is a view showing the bag body 11 in a deflated state. The worker stops the operation of the air compressor 8, for example, during a period when work in the work space S1 is not performed. As a result, the bag 11 is naturally deflated and becomes the state shown in FIG.

  In order to increase the speed at which the bag body 11 is deflated and exhaust the gas in the bag body 11 sufficiently, the operator replaces the air compressor 8 connected to the air hose 9 with a vacuum pump, and the vacuum pump May be operated to forcibly discharge the gas from the bag body 11. However, when the air compressor 8 also has the function of a vacuum pump, the operator does not need to connect the air compressor 8 to the vacuum pump, and the operation mode of the air compressor 8 may be switched.

  When the worker changes the installation position of the bag body 11, the operator removes the rope 12 attached to the bag body 11 in the state of FIG. 5 from the peg 7 and releases the connection between the air hose 9 and the bag body 11. The body 11 is moved to a new installation position. Thereafter, the operator attaches the pegs 7 to the ground near the new installation position, hooks the annular portion of the rope 12 on the pegs 7, and then connects the air hose 9 to the inlet 111 of the bag 11 to The operation of 8 is started. As a result, the bag 11 is expanded upward by the gas injected from the air compressor 8, and the state shown in FIG. 1 is obtained.

  When removing the soundproof wall 1, the operator stops the operation of the air compressor 8 and switches the air compressor 8 connected to the air hose 9 to a vacuum pump, or changes the operation mode of the air compressor 8 to the vacuum pump mode. Switch and start operation of vacuum pump. As a result, the gas is discharged from the bag 11 and the state shown in FIG. 5 is obtained. The operator removes the rope 12 from the peg 7 and winds up the bag 11 in the state shown in FIG. 5 to the state shown in FIG. 3, and then loads the soundproof wall 1 on the truck and transports it to the storage place.

  According to the soundproof wall 1 described above, since the upper portion of the work space S1 is open, for example, when a work device such as a backhoe performs work in the work space S1, there is no restriction on the operation in the height direction. However, most of the dust generated in the work space S1 is prevented from moving by the air curtain AC formed by the gas ejected from the bag 11 of the soundproof wall 1 and cannot reach the external space S2. Therefore, soundproofing and dustproofing in the external space S2 is realized.

[Modification]
The above-described embodiment is a specific example of the present invention and may be variously modified. Examples of these modifications are shown below.

(1) FIG. 6 is a side view of the soundproof wall 2 according to a modification of the embodiment described above. Similar to the soundproof wall 1, the soundproof wall 2 includes a bag body 11, a rope 12, and a free metal fitting 13. The soundproof wall 2 further includes a sound absorbing material 24 attached on the side surface of the bag body 11 on the working space S1 side, a relief valve 25 attached to each of the plurality of jet nozzles 112 of the bag body 11, and a jet nozzle. The nozzle 26 attached to the outer side of each 112 and the relief valve 27 attached to the inlet 111 which the bag body 11 has are provided.

  The sound absorbing material 24 is, for example, foamed urethane or the like molded into a predetermined shape in order to improve sound absorbing performance, and has a flexibility that does not hinder the winding or folding of the bag body 11. The sound absorbing material 24 is composed of, for example, a plurality of flat small pieces, and is disposed so as to cover the front surface of the bag body 11 on the side of the work space S1. Note that an appropriate gap may be provided between the small pieces of the sound absorbing material 24 in order to facilitate the winding and folding of the bag body 11.

  The relief valve 25 is opened by the pressure of the gas injected into the bag body 11 by the air compressor 8, does not regulate the flow of the gas passing through the ejection port 112, and does not regulate the gas injected into the bag body 11 by the air compressor 8. It is closed under a pressure sufficiently lower than the pressure, and restricts the flow of gas passing through the jet port 112.

  7 is a plan view of the nozzle 26 (viewed in the direction of arrow A in FIG. 6), and FIG. 8 is a front view of the nozzle 26 (viewed in the direction of arrow B in FIG. 7). The nozzle 26 has a circular intake port 261 connected to the jet port 112 of the bag body 11 and a slit-shaped exhaust port 262 for jetting gas flowing in from the intake port 261 to the outside. The longitudinal direction of the shape of the exhaust port 262 is a direction along the extending direction of the wall formed by the bag body 11. The nozzle 26 restricts the outflow direction of the gas ejected so that the gas ejected from the ejection port 112 forms a belt shape.

  The relief valve 27 is opened by the pressure of the gas injected into the bag body 11 by the air compressor 8, does not regulate the flow of the gas passing through the inlet 111, and does not regulate the gas injected into the bag body 11 by the air compressor 8. It is closed under a pressure sufficiently smaller than the pressure, and restricts the flow of gas passing through the inlet 111.

  According to the soundproof wall 2 configured as described above, the soundproof performance of the bag 11 is enhanced by the sound absorbing material 24. Moreover, in the soundproof wall 2, since the gas ejected from the nozzle 112 by the nozzle 26 becomes a strip shape, the amount of gas required to form the air curtain AC is smaller than in the case of using the soundproof wall 1. In the soundproof wall 2, the relief valve 25 and the relief valve 27 maintain the shape of the wall body because the gas injected into the bag body 11 stays in the bag body 11 while the air compressor 8 is stopped.

(2) FIG. 9 is a side view of the soundproof wall 3 according to a modification of the above-described embodiment, and FIG. 10 is a plan view of the soundproof wall 3. The bag 11 provided in the soundproof wall 3 does not have the spout 112. The soundproof wall 3 includes a long and narrow nozzle 36 disposed on a line slightly closer to the work space S1 than the ridgeline of the bag body 11 forming the wall body. 11 is a plan view of the nozzle 36 (viewed in the direction of arrow C in FIG. 9), and FIG. 12 is a front view of the nozzle 36 (viewed in the direction of arrow E in FIG. 11).

  An air compressor 5, which is different from the air compressor 8 used for injecting gas into the bag body 11, is connected to the air inlet 361 of the nozzle 36 via an air hose 6. The gas flowing in from the intake port 361 is ejected vigorously from the slit-shaped exhaust port 362 to form an air curtain AC.

  The sound barrier 3 also prevents the movement of dust from the work space S1 toward the external space S2 by the air curtain AC, thereby realizing dust prevention in the external space S2.

(3) The shape, size, quantity, material, and the like of the components of the soundproof wall shown in the above-described embodiments and modifications may be variously changed. Moreover, the procedure in installation, movement, and removal of the soundproof wall described in the above-described embodiment may be variously changed.

DESCRIPTION OF SYMBOLS 1 ... Soundproof wall, 2 ... Soundproof wall, 3 ... Soundproof wall, 5 ... Air compressor, 6 ... Air hose, 7 ... Peg, 8 ... Air compressor, 9 ... Air hose, 11 ... Bag body, 12 ... Rope, 13 ... Free metal fittings , 24 ... Sound absorbing material, 25 ... Relief valve, 26 ... Nozzle, 27 ... Relief valve, 36 ... Nozzle, 111 ... Inlet, 112 ... Outlet, 261 ... Inlet, 262 ... Exhaust, 361 ... Inlet, 362 …exhaust port

Claims (3)

A flexible bag having a wall that swells by an injected gas, forms a wall body that stands upward from the installation position, and ejects the injected gas to form an air curtain on the side or above the wall body Soundproof wall with a shape. The soundproof wall according to claim 1, further comprising a relief valve that regulates a flow of gas passing through the ejection port. The soundproof wall according to claim 1, further comprising a nozzle that limits an outflow direction of the gas ejected so that the gas ejected from the ejection port forms a belt shape.

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