JP2007255097A - Suction vehicle and suction equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suction vehicle reduced in noise during a suction operation. <P>SOLUTION: A Roots-blower 12 which sucks in air in a storage tank, a suction engine 14 which is independently provided separately from a traveling engine for driving the Roots-blower 12, and a driving mechanism 13 which drives the Roots-blower 12 by the suction engine 14, are provided on a vehicle frame. A soundproof cover 19 which is equipped with an inlet port 71 and an exhaust passage, is provided to cover the driving mechanism 13, the suction engine 14 and the Roots-blower 12. The inlet port 71 and an exhaust port are provided with a sound insulation wall 75 for insulating a sound transmitted outward from the inside of the soundproof cover 19, and a left side plate, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a suction vehicle and a suction device for recovering a collection object (hereinafter referred to as a collection object) such as sludge and mud sand in a sewer pipe or a side ditch of a road.

  Conventionally, a suction vehicle or a suction device has been used to collect and collect the objects to be collected in sludge collection in sewage pipes, manholes, roadside ditches, etc., muddy sand collection in water purification plants, or dredging work in general rivers. ing. According to the suction wheel and the suction device, the collection target is sucked and stored in the storage tank, transported to a predetermined disposal place, and discharged.

  As an example of this type of suction wheel, there is a suction wheel in which a roots blower (suction force generator) is provided on the front side of the body frame and a storage tank is provided at the rear of the body frame so as to be tiltable (see, for example, Patent Document 1). ). FIG. 10 is a side view showing such a conventional suction wheel. The suction wheel 101 is provided with a storage tank 103 at the rear portion of the vehicle body frame 102, and a suction pipe 104 is provided on the front side of the storage tank 103. A cyclone 105 and a first water task rubber 106 connected to each other are provided, and a roots blower 107 is provided on the front side thereof. The cyclone 105 removes dust and the like from the air in the storage tank 103 sucked by the roots blower 107, and the first water task rubber 106 removes finer dust and the like from the air that has passed through the cyclone 105.

  A second water task rubber 108 is provided on the front side of the Roots blower 107 to remove fine dust and water droplets in the air exhausted from the Roots blower 107. Therefore, the exhaust is discharged from the second water task rubber 108 into the atmosphere.

  In this suction wheel 101, the roots blower 107 is driven by the power extracted from the traveling engine of the vehicle by the PTO mechanism 109 (Power Take Off). In the illustrated example, the V belt 111 is driven by the drive shaft 110 of the PTO mechanism 109, and the roots blower 107 is driven by the V belt 111.

  In this way, the suction wheel 101 drives the roots blower 107 with the traveling engine of the vehicle, and sucks the air in the storage tank 103 with the roots blower 107, thereby collecting the collection object through the suction hose 112. It is configured to suck in.

As a prior art of this type, there is also a suction hood blower hood in which a blower hood of a suction wheel is covered with a blower hood, a sound insulating material is provided at the lower edge of the blower hood, and a sound absorbing material is provided on an inner peripheral surface (for example, patents). Reference 2).
JP 58-204240 (3rd page, Fig. 1) Japanese Utility Model Publication No. 60-11837 (Page 2, Fig. 3)

  However, since the suction wheel 101 as described in Patent Document 1 drives the Roots blower 107 with the traveling engine of the vehicle, the sound of the traveling engine becomes very loud during suction work, and the Roots blower 107 itself The sound is loud and may cause noise problems. Further, when working while driving the traveling engine at a high speed, vibration noise generated by the vibration from the traveling engine propagating to the vehicle also becomes a noise source, which may cause noise problems. . In particular, noise problems may occur in recent years due to vibration and noise generated during sludge collection in roadside ditches in residential areas and sludge collection work such as sewage pipes and manholes. Therefore, in recent years, noise countermeasures and vibration countermeasures in this type of suction vehicle have been emphasized. In addition, noise countermeasures and vibration countermeasures are also regarded as important in suction devices.

  Note that the blower hood of the suction wheel described in Patent Document 2 has no measures against vibrations including the drive engine, so it is difficult to suppress noise around the vehicle.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a suction wheel and a suction device that reduce noise during suction work to reduce noise.

  In order to achieve the above object, a suction wheel according to the present invention is a suction wheel that sucks and stores a collection object in a storage tank mounted on the vehicle, and suction force generator that sucks air in the storage tank. A suction engine provided independently of the traveling engine for driving the suction force generator, and a drive mechanism for driving the suction force generator by the suction engine, provided on the vehicle body frame, A soundproof cover that covers the suction engine and the suction force generator is provided, and an intake port and an exhaust port are provided in the soundproof cover, and are transmitted outward from the inside of the soundproof cover to the intake port and the exhaust port. A sound insulation wall is provided to block sound. As a result, the noise generated by the suction engine provided separately from the traveling engine covered with the soundproof cover, and the suction force generator such as the Roots blower and its drive mechanism is directly transmitted from the intake port and the exhaust port of the soundproof cover. Since the sound insulation wall blocks the transmission to the outside, the noise transmitted to the outside from the intake and exhaust ports can be suppressed, and the noise around the vehicle during work can be reduced.

  The intake port and the exhaust port may be opened upward and downward from the soundproof cover, and the sound insulating wall may be provided at the intake port and the exhaust port. As a result, sound transmitted outward from the intake and exhaust ports of the soundproof cover is blocked by the sound insulation walls, and even if sound leaks from these intake and exhaust ports, it will be upward or downward, and noise around the suction vehicle will be reduced. Can be reduced.

  Further, an upstream dust collector through which air sucked into the suction force generator passes is provided between the storage tank and the suction force generator, and the exhaust of the suction force generator is disposed downstream of the suction force generator. A downstream dust collector is provided, and vibrations of the suction force generator are provided in a flow path between the upstream dust collector and the suction force generator and in a flow path between the suction force generator and the downstream dust collector. May be provided with a flexible member that prevents the dust from being transmitted to the upstream dust collector and the downstream dust collector. Thereby, it is possible to suppress the vibration of the suction force generator supported by the vibration isolation mechanism from being transmitted to other configurations via the flow path.

  The soundproof cover includes a lower plate located below the suction engine and the suction force generator, a side plate located on the side, and an upper plate located on the upper portion, and the lower plate and the side plate The air inlet may be provided on the side plate, and the exhaust port may be provided on the side plate. As a result, the air is sucked in from the air intake opening that opens downward on the lower part and the side part of the soundproof cover and is exhausted from the air exhaust opening that opens upward from the side part of the soundproof cover. The sound can be suppressed.

  Furthermore, a radiator of the suction engine may be disposed at the exhaust port, and air that has passed through the radiator may be exhausted from the opening. As a result, the sound inside the soundproof cover can be attenuated when passing through the radiator.

  Further, a partition wall may be provided inside the soundproof cover to form an exhaust passage, a radiator of the suction engine may be disposed in the partition wall facing the exhaust passage, and an upper portion of the exhaust passage may be formed in the opening. . Thereby, the noise attenuated when passing through the radiator can be further attenuated in the exhaust passage and discharged from the upper part.

  Furthermore, a soundproofing material for soundproofing different frequencies may be provided on the inner surface of the soundproofing cover in combination in the thickness direction. Thereby, the noise generated inside the soundproof cover can be attenuated from the high frequency range to the low frequency range, and the noise leaking from the soundproof cover to the outside can be greatly reduced.

  On the other hand, the suction device of the present invention is a suction device provided with a device frame configured to be mountable on a detachable vehicle, wherein a storage tank for sucking and storing a recovery object is provided in the device frame, and the storage tank A suction force generator that sucks the air inside, a suction engine that is provided separately from a travel engine that drives the suction force generator, and a drive mechanism that drives the suction force generator by the suction engine A soundproof cover is provided, and the soundproof cover is provided with an intake port and an exhaust port, and a sound insulation wall is provided at the air intake port and the exhaust port to block sound transmitted outward from the inside of the soundproof cover. As a result, a suction engine provided independently of the traveling engine, a suction force generator such as a Roots blower, and the intake and exhaust ports of the soundproof cover covering the drive mechanism of the suction force generator are directed outward. Therefore, it is possible to configure a suction device that blocks noise transmitted to the air and suppresses noise leaking from the configuration that generates the most noise, thereby reducing noise.

  According to the present invention, by means such as described above, it is possible to greatly reduce noise leakage from the suction engine and the suction force generator that generate the most noise in the suction wheel and the suction device. Noise from the engine and suction power generator can be greatly reduced.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 is a side view showing a suction wheel according to an embodiment of the present invention, FIG. 2 is a plan view of the suction wheel shown in FIG. 1, and FIG. 3 is a rear view of the suction wheel shown in FIG. FIG. 4 is a system diagram showing the air flow in the flow path in the suction wheel shown in FIG. The overall configuration of the suction wheel 1 will be described based on these drawings. In the following description, the front side, rear side, left side, and right side refer to the front side, rear side, port side, and starboard side of the vehicle.

  As shown in FIGS. 1 and 2, a storage tank 3 is tiltably provided at a rear portion of the sub-frame 17 on the vehicle body frame 2 of the suction wheel 1. Inside the storage tank 3 is provided a receiver rubber 5 against which a collection object sucked into the storage tank 3 via the suction hose 4 comes into contact. On the front side of the storage tank 3 is provided a first water task rubber 7 which is an upstream dust collector connected via a first intake pipe 6. A flexible member 6A is used on the rear side of the first intake pipe 6 so that the storage tank 3 may tilt, and a steel pipe 6B is used on the front side. An opening / closing valve 22 that opens and closes the first intake pipe 6 is provided at an intermediate portion of the first intake pipe 6B. The first water task rubber 7 is provided on a part of the tank 8 arranged on the side (left side in FIG. 2). A silencer 10 is provided on the front side of the first water task rubber 7 via a second intake pipe 9, and a roots blower 12 serving as a suction force generator is provided below the silencer 10 via a third intake pipe 11. ing. The first water task rubber 7 removes dust and the like from the air in the storage tank 3 sucked by the roots blower 12, and the silencer 10 reduces noise generated when air is sucked into the roots blower 12. I am trying.

  A suction engine 14 for driving the roots blower 12 is provided on the front side of the roots blower 12 independently of the traveling engine. The suction engine 14 and the roots blower 12 are arranged side by side on a gantry 15 that is integrally formed. A drive mechanism 13 for driving the roots blower 12 by the suction engine 14 is also provided on the gantry 15. The gantry 15 is integrally formed in a frame shape so that the suction engine 14 and the roots blower 12 can be juxtaposed in the horizontal direction. The suction engine 14 and the roots blower 12 are juxtaposed in the horizontal direction on the gantry 15. By installing the vehicle, heavy objects are arranged low to lower the center of gravity of the vehicle. The gantry 15 is provided via a vibration isolation mechanism 18 on a subframe 17 that is integrally provided on the upper part of the vehicle body frame 2 in a state where the suction engine 14 is disposed on the rear side of the cab 16 of the suction wheel 1. . The vibration isolating mechanism 18 in this embodiment is constituted by a plurality of vibration isolating rubbers 42. Details thereof will be described later. In this embodiment, the silencer 10, the roots blower 12, the suction engine 14, the drive mechanism 13, and the frame 15 provided with these are covered by a soundproof cover 19.

  Further, on the downstream side of the Roots blower 12, a first exhaust pipe 20 exhausted from the Roots blower 12, and a downstream dust collector that removes fine dust and water droplets in the air exhausted from the first exhaust pipe 20 are provided. A two-water task rubber 21 is provided. An opening / closing valve 24 that opens and closes the first exhaust pipe 20 is provided at an intermediate portion of the first exhaust pipe 20 (FIGS. 1 and 4). The second water task rubber 21 is provided on the other side (the right side in FIG. 2) of the tank 8 in which the first water task rubber 7 is partially provided. By forming the second water task rubber 21 and the first water task rubber 7 integrally as a tank 8, the structure for collecting these dusts is made compact. Further, by arranging the tank 8 in a lateral direction between the storage tank 3 and the roots blower 12, the suction wheel 1 is made compact. The air that has passed through the second water task rubber 21 is guided to the lower part of the vehicle by the second exhaust pipe 46 and released into the atmosphere. It should be noted that the water task rubbers 7 and 21 in this embodiment are not necessarily limited to wet type dust collectors, and may be other dust collectors such as a plurality of louvers arranged in parallel. May be.

  Further, a pressure pipe 23 connects the upstream side of the first exhaust pipe 20 with respect to the opening / closing valve 24 and the upstream side of the opening / closing valve 22 of the first intake pipe 6. An opening / closing valve 25 for opening and closing the pressurizing pipe 23 is provided at an intermediate portion of the pressurizing pipe 23 (FIGS. 1 and 4). The pressurizing pipe 23 supplies the air exhausted from the first exhaust pipe 20 to the second water task rubber 21 into the storage tank 3 through the first intake pipe 6, and the collection target in the storage tank 3 is drained. It can be used as pressurized air to be discharged from the air.

  A load release air inlet 47 and an opening / closing valve 48 are provided between the opening / closing valve 22 of the first intake pipe 6 and the first water task rubber 7. The load release air introduction port 47 is an inlet for introducing outside air into the first intake pipe 6 by opening the on-off valve 48.

  The flow of air in these pipes will be described based on the system diagram of FIG. The solid arrow shown in the figure indicates the flow of air when the collection object is sucked into the storage tank 3, and the broken arrow shown in the figure indicates that air is discharged into the storage tank 3 when the collection object in the storage tank 3 is discharged. The flow when supplying is shown. When the object to be collected is sucked into the storage tank 3 via the suction hose 4, the opening / closing valve 48 of the load release air introduction port 47 and the opening / closing valve 25 of the pressurizing pipe 23 are closed, and the first intake pipe 6 is opened / closed. The valve 22 and the opening / closing valve 24 of the first exhaust pipe 20 are opened. When the roots blower 12 is driven in this state, as indicated by a solid arrow, the air in the storage tank 3 is sucked into the first water task rubber 7 from the upper part of the tank through the first intake pipe 6, and the first water task rubber 7 And is sucked into the roots blower 12 through the silencer 10. The exhaust from the roots blower 12 is exhausted to the second water task rubber 21 via the first exhaust pipe 20 and exhausted to the atmosphere from the second exhaust pipe 46.

  Further, when the collection object is discharged from the drain port 32 of the storage tank 3, the on-off valve 48 of the load release air introduction port 47 and the on-off valve 25 of the pressurizing pipe 23 are opened, and the first intake pipe 6 is opened and closed. The valve 22 and the opening / closing valve 24 of the first exhaust pipe 20 are closed. When the roots blower 12 is driven in this state, external air is drawn into the first water task rubber 7 from the load release air introduction port 47 through the first intake pipe 6B, as indicated by the broken arrow, and the first water task rubber 7 And is sucked into the roots blower 12 through the silencer 10. Exhaust gas from the roots blower 12 is supplied from the first exhaust pipe 20 into the storage tank 3 through the pressurizing pipe 23 and the first intake pipe 6A. By switching the on-off valves 22, 24, 25, 48 in this way, the collection target object can be sucked into the storage tank 3 and the collection target object can be discharged.

  Further, in this embodiment, an intermediate portion of the second intake pipe 9 that is a flow path between the first water task rubber 7 and the roots blower 12, and a flow path between the root blower 12 and the second water task rubber 21. A rubber tube 49 as a flexible member is provided in the middle portion of the first exhaust pipe 20. As this flexible member, a flexible metal tube, a rubber tube, or the like is used. By providing the rubber pipe 49 in the intake pipe 9 and the exhaust pipe 20, the vibration of the Roots blower 12 supported by the vibration isolation mechanism 18 causes the first and second water task rubbers 7 through the intake pipe 9 and the exhaust pipe 20. , 21 is suppressed from being transmitted.

  On the other hand, as shown in FIG. 3, a rear gate of the storage tank 3 is provided with an upper support portion 26 at the upper portion of the tank, and a tailgate 27 configured to open and close the lower portion with the upper support portion 26 as a fulcrum. Is provided. The tailgate 27 is opened rearward around the upper support 26 by extending an open / close cylinder 28 provided on the side of the tank. When the open / close cylinder 28 is contracted, the tailgate 27 is closed.

  As shown in FIG. 1, the storage tank 3 is configured to be tiltable by swinging the front side upward with a lower support portion 29 provided at the rear portion of the vehicle body frame 2 as a fulcrum. This tilting of the storage tank 3 is tilted by raising the tilting cylinder 30 provided at the lower part of the tank and raising the front side of the storage tank 3. By retracting the tilt cylinder 30, the storage tank 3 is returned to the horizontal state. Further, the tailgate 27 of this embodiment is provided with a suction port 31 at the center and a drainage port 32 on the left side thereof. The suction hose 4 is connected to the suction port 31. The suction port 31 and the drain port 32 are provided with on-off valves 33 and 34, respectively. By switching the on-off valves 22, 24, 25, 48, the air released from the second water task rubber 21 into the atmosphere is supplied into the storage tank 3 from the pressurizing pipe 23, and the on-off valve 34 is opened, The object to be collected in the storage tank 3 can be reliably discharged from the drain port 32 by air pressure.

  In this way, the roots blower 12 is driven by the suction engine 14 that is separate from the traveling engine provided in the suction wheel 1, and the air in the storage tank 3 is sucked by the roots blower 12, so that the suction port of the tailgate 27. The object to be collected is sucked into the storage tank 3 from the suction hose 4 connected to 31, and the air sucked by the Roots blower 12 is released into the atmosphere through the second water task rubber 21 or is stored in the storage tank 3. It is comprised so that it can utilize as pressurized air for discharging | emitting a collection target object.

  5 is a drawing showing a lower plate of the soundproof cover in the suction wheel shown in FIG. 1, wherein (a) is a plan view and (b) is a VV sectional view shown in (a). As shown in FIG. 1, the lower plate 60 of the soundproof cover 19 provided so as to surround the suction engine 14, the roots blower 12, and the drive mechanism 13 is provided on the subframe 17 provided on the upper part of the vehicle body frame 2. It is fixed by welding or the like. The lower plate 60 is formed in a size that can fix the gantry 15 provided with the suction engine 14, the roots blower 12, and the drive mechanism 13. The sub-frame 17 at the position where the lower plate 60 is provided is provided with a reinforcing frame 61 in the width direction so that the structure provided on the upper portion of the lower plate 60 can be stably supported. The lower plate 60 may be formed integrally with the subframe 17.

  An anti-vibration rubber 42 that supports the mount 15 is provided on the lower plate 60. The anti-vibration rubber 42 is fixed to a two-dot chain attachment portion 64 shown in the figure. As for the arrangement of the anti-vibration rubbers, six are arranged on the suction engine 14 side which is a heavy object, and two are arranged on the roots blower 12 side. In this embodiment, eight vibration-proof rubbers 42 provide vibration-proof support for the gantry 15 provided with the suction engine 14, the roots blower 12, and the drive mechanism 13 of the roots blower 12. The arrangement of the anti-vibration rubbers 42 in this embodiment is an example, and these arrangements and numbers are preferable in consideration of the weight of the suction engine 14 and the roots blower 12, the number of rotations, the spring constant of the anti-vibration rubber 42, and the like. What is necessary is just to determine a number, and is not limited to this embodiment.

  In addition, at the lower portion of the lower plate 60 where the suction engine 14 is located, intake ports 62 and 63 for taking air into the soundproof cover 19 are provided. These intake ports 62 and 63 are provided so as to avoid the mounting portion 64 of the anti-vibration rubber 42. A large air inlet 62 is provided between the two body frames 2 provided in the vehicle width direction, and a small air inlet 63 is provided on the right outer side of the body frame 2. These intake ports 62 and 63 are examples, and may be provided at other locations of the lower plate 60.

  A sound insulation wall 65 is provided below the intake ports 62 and 63. The sound insulation wall 65 is formed of a plurality of plate members, and includes an upper surface 65a that is in contact with the intake ports 62 and 63, an inclined surface 65b that is bent from the upper surface 65a and is inclined to one side, and is bent from the inclined surface 65b. The sound insulating wall 65 is formed in parallel with a plate member having a lower surface 65c formed in parallel with the upper surface 65a. In the figure, the lower part of the sound insulation wall 65 provided at the right end of the air inlet 63 is cut off from the middle point of the inclined surface 65b so as not to interfere with other components. The sound insulation walls 65 formed in this way are provided at substantially equal intervals so that the inclined surfaces 65b are positioned in a direction perpendicular to the opening surface direction of the intake ports 62 and 63. Thereby, the sound insulation wall 65 is formed in the inlet ports 62 and 63 so as to block the sound transmitted outward from the inside of the soundproof cover 19. By providing the sound insulating wall 65, the outward noise that is emitted from the intake ports 62 and 63 in the vertical direction is reflected on the sound insulating wall 65, attenuated by changing the direction, and prevented from being directly transmitted to the outside of the sound insulating cover 19. . Further, when a soundproof material is attached to the sound insulation wall 65, noise can be further reduced. Note that the arrow e indicates the flow of air, and the arrow f indicates the flow of sound.

  6 is a side view of the inside of the soundproof cover except the left side plate 68 of the soundproof cover in the suction vehicle shown in FIG. 1, and FIG. 7 is a soundproof cover except the front side plate of the soundproof cover in the suction vehicle shown in FIG. FIG. 7 is an internal drawing and is a cross-sectional view taken along the line VII-VII in FIG. 6. 8A and 8B are cross-sectional views of the soundproof material on the front side plate of the soundproof cover shown in FIGS.

  As shown in FIGS. 6 and 7, the soundproof cover 19 includes a lower plate 60, a front plate 66, a rear plate 67, a left plate 68, a right plate 69, and an upper plate erected vertically from the lower plate 60. It is comprised with the board 70. FIG. The lower plate 60, the front plate 66, the rear plate 67, the left plate 68, the right plate 69, and the upper plate 70 are formed in a box shape.

  On the other hand, the frame 15 covered with the soundproof cover 19 is supported by the vibration isolation mechanism 18 on the upper part of the lower plate 60. The vibration isolating mechanism 18 includes a plurality of vibration isolating rubbers 42 provided at the lower part of the gantry 15. As shown in a cross-sectional view in FIG. 7, the vibration-proof rubber 42 according to this embodiment is formed by vulcanizing and bonding rubber in a vertical inclined shape with a space at the top, and is used in the vertical and horizontal directions. Non-directional ones with almost equal spring constants are adopted. The anti-vibration rubber 42 has a central portion fixed to the mount 15 with bolts and nuts 43, and a mounting plate 44 fixed to the lower plate 60 and the subframe 17 with bolts and nuts 45. The anti-vibration rubber 42 may be other types. Further, the “vibration isolation mechanism” in the document of this specification and the claims may be configured to exhibit a vibration isolation function other than the vibration isolation rubber.

  The drive mechanism 13 of this embodiment is a V-belt type drive mechanism, and includes a drive pulley 36 provided in the suction engine 14, a driven pulley 37 provided in the roots blower 12, and a space between them. And a V-belt 35 hung on. The V belt 35 is configured to be adjustable to a predetermined tension by a tension adjusting mechanism 38 provided in the drive mechanism 13. As the belt driving mechanism, a timing belt or the like may be used. The tension adjusting mechanism 38 is provided with an adjusting pulley 40 that moves up and down along a frame-shaped guide member 39 erected on the mount 15. The tension of the V belt 35 is adjusted by moving the adjustment pulley 40 up and down along the guide member 39 by rotating an adjustment shaft 41 provided on the upper portion of the guide member 39. The drive mechanism 13 may be another drive mechanism such as a chain or a drive shaft.

  The front side plate 66 of the soundproof cover 19 is provided with an intake passage 71 to the inside of the soundproof cover 19 in the same manner as the intake ports 62 and 63 provided in the lower plate 60. The intake passage 71 is provided in an intake cover 72 that is detachably provided on the front side plate 66. As shown by a two-dot chain line in FIG. 7, the intake cover 72 is provided so as to be positioned on the front side of the suction engine 14 (see FIG. 2). In this embodiment, two intake covers 72 in the width direction are provided. Is provided. Each of these intake covers 72 is provided with an intake passage 71, and the intake ports 62, 63 and the intake passage 71 are configured to intake air into the soundproof cover 19. Reference numeral 77 denotes a fixing bracket for locking the intake cover 72 to the front side plate 66. The intake cover 72 can be removed from the front side plate 66 by releasing the locking state with the front side plate 66 by rotating the fixing bracket 77.

  The intake passage 71 has an opening 73 formed on the front surface of the front plate 66 and is formed between the opening 73 and a front sound insulation wall 75 provided at a predetermined distance from the front side. The intake passage 71 is formed such that an opening 74 is provided only on the lower side of the front sound insulation wall 75, and the lower end of the sound insulation wall 75 is located below the lower end of the opening 73. The lower end position of the front wall 75 is set to a position where the outward noise coming out from the opening 74 in the horizontal direction can be blocked so as not to be directly transmitted to the outside. Thus, by forming the intake passage 71 opening downward, the front wall 75 of the intake passage 71 is formed as a sound insulation wall.

  Further, a soundproof material 76 as shown in FIGS. 8A and 8B is provided on the inner surface of the intake cover 72 and the inner surface of the soundproof cover 19. The soundproofing material 76A shown in FIG. 5A is composed of a sponge layer 76a that exhibits a soundproofing effect in a predetermined frequency band and a rubber layer 76b that exhibits a vibration damping effect. The soundproof material 76B shown in (b) has a single layer structure of a sponge layer 76a that exhibits a soundproofing effect in a predetermined frequency band. The soundproofing material 76 may have other configurations. For example, a soundproofing material having a three-layer structure having a vibration damping / soundproofing / soundproofing function is most preferable. The soundproof material 76 may be determined according to the position where it is provided, the generated noise, and the noise that is desired to be attenuated.

  On the other hand, as shown in FIG. 6, the inside of the left side of the soundproof cover 19 with the left side plate 68 removed is partitioned by a partition wall 78 and a space provided with the suction engine 14, roots blower 12, and drive mechanism 13. It is formed in a separate space. This space is an exhaust passage 79 serving as an exhaust port, and the soundproof material 76 is provided around the inner surface of the exhaust passage 79. An opening / closing door 88 for checking the inside of the exhaust passage 79 is provided on the left side plate 68 forming the exhaust passage 79.

  The rear part on the left side of the soundproof cover 19 is an operation switch of the suction engine 14, an operation lever for tilting the storage tank 3, a control panel 80 indicating the operating state of the roots blower 12, the pressure in the storage tank 3, etc. It is a space where is provided. Further, an exhaust muffler 81 of the suction engine 14 is provided in the upper part of the exhaust passage 79. The exhaust muffler 81 is supported by a stay 82 provided on the partition wall 78. An end portion of the muffler exhaust pipe 83 of the exhaust muffler 81 protrudes from the upper plate 70 of the soundproof cover 19 and opens rearward. As shown in FIG. 2, the muffler exhaust pipe 83 is provided close to an opening 84 formed at the upper end of the exhaust passage 79. The opening 84 is provided with a net member 85 that prevents foreign matter from entering the exhaust passage 79.

  Further, a radiator 86 of the suction engine 14 is provided in the partition wall 78 facing the exhaust passage 79. The periphery of the radiator 86 is in close contact with the partition wall 78 so that there is no gap. A cooling fan 87 is provided on the radiator 86 side of the suction engine 14 provided inside the soundproof cover 19, and the radiator 86 is air-cooled by the cooling fan 87, so that the airflow causes the airflow of the soundproof cover 19. The internal air passes through the radiator 86 and is exhausted from the exhaust passage 79 to the upper portion of the soundproof cover 19. The air emitted from the radiator 86 is reflected by the inner surface of the left side plate 68 and then exhausted to the upper portion of the soundproof cover 19, so that the left side plate 68 serves as a sound insulating wall. Therefore, the air inside the soundproof cover 19 is forcibly exhausted from the radiator 86 and is sucked into the soundproof cover 19 from the intake ports 62 and 63 and the intake passage 71. Thereby, an air flow is created inside the soundproof cover 19. The arrow e indicates the air flow, and the arrow f indicates the sound flow.

  According to the suction wheel 1 configured as described above, the suction engine 14 provided independently of the traveling engine that is the largest noise source, the roots blower 12 driven by the suction engine 14, and the roots blower 12 Since the drive mechanism 13 for driving is integrally covered by the soundproof cover 19 together with the gantry 15 for supporting them, the noise leaking from these configurations can be greatly reduced. Further, since the silencer 10 for air sucked into the roots blower 12 is also covered by the soundproof cover 19, the noise from the silencer 10 can be greatly reduced.

  Furthermore, since the intake to the inside of the soundproof cover 19 is performed from the intake ports 62 and 63 provided in the lower plate 60 and the intake passage 71 provided in the front part of the soundproof cover 19 behind the cab, Even if sound leaks from these intake ports 62 and 63 and the intake passage 71, it is difficult to be transmitted to the side of the vehicle, so that noise to the surroundings can be suppressed. Moreover, since the sound insulation walls 65 and 75 are provided in the intake ports 62 and 63 and the intake passage 71, the sound propagating outward from the inside of the sound insulation cover 19 strikes the sound insulation walls 65 and 75 and changes its direction. At the same time, the energy is also attenuated, and noise transmitted to the surroundings can be reduced.

  In addition, according to this embodiment, since the exhaust from the inside of the soundproof cover 19 is performed via the radiator 86, the noise in the exhaust is also attenuated by each fin by passing through the radiator 86, and further the exhaust Since the sound is attenuated by the soundproofing material 76 provided on the inner surface of the passage 79 and then discharged upward, the noise in the exhaust is also significantly attenuated. In addition, since the exhaust from the exhaust passage 79 is performed upward, noise is emitted to the sky along the flow of the exhaust, and noise to the surroundings can be suppressed.

  Moreover, according to the suction wheel 1 of the present embodiment, the suction work is performed by driving the roots blower 12 supported by the vibration-proof rubber 42 and the vibration-supported suction engine 14 together with the sound-proofing of the sound-proofing cover 19. Therefore, since the vibrations of the suction engine 14 and the roots blower 12 can be effectively damped and the noise can be suppressed, the sound collection and vibration proof satisfy the collection work of the collection object in a residential area or the like. It is possible to perform the suction sound 1 that can be performed with a working sound of a possible level and is good for the environment. Therefore, according to the suction vehicle 1 of this embodiment, the sludge collection work etc. in a residential area etc. can be performed, reducing noise, and the suction vehicle 1 good for an environment can be comprised.

  FIG. 9 is a side view showing a suction device according to an embodiment of the present invention. The suction device 50 according to this embodiment is mounted on the detachable vehicle 51, transported to a destination, and can be collected as a suction device 50 that is lowered from the vehicle and placed on the spot. is there. The suction device 50 is configured separately from the detachable vehicle 51, and the device frame 52 that supports the suction device 50 as a whole can be mounted on the detachable vehicle 51. Since the suction device 50 has the same configuration as that provided on the sub-frame 17 of the suction wheel 1, detailed description thereof is omitted.

  As shown in the figure, the suction device 50 is provided with a device frame 52, and a hook portion 57 of a cargo handling arm 58 supported by a support shaft 53 on a detachable vehicle 51 is hooked on a locking portion 56 of the device frame 52, By tilting the cargo handling arm 58 with a cargo handling cylinder 59, the apparatus frame 52 can be placed on a guide roller 55 provided at the rear end of the sub-frame 54 of the detachable vehicle 51 and slid in the front-rear direction. ing. Accordingly, the suction device 50 can be placed on the subframe 54 or lowered from the subframe 54. The configuration in which the suction device 50 is placed on or lowered from the subframe 54 is an example, and another configuration may be used.

  According to the suction device 50 configured as described above, like the suction wheel 1, the suction engine 14 provided independently of the traveling engine that is the largest noise source in the suction device 50, and the suction engine Since the roots blower 12 driven by 14 and the drive mechanism 13 driving the roots blower 12 are integrally covered with a soundproof cover 19 together with a gantry 15 supporting them, noise leaking outside from these configurations Can be greatly reduced. Further, since the suction engine 14 serving as a vibration source, the roots blower 12 driven by the suction engine 14 and the drive mechanism 13 driving the roots blower 12 are integrally vibration-proof supported together with the gantry 15, Noise and vibration from the configuration can be greatly reduced. Therefore, the collection work of the collection object in a residential area or the like can be performed with a satisfactory level of work sound, and the suction device 50 that is good for the environment can be configured.

  In addition, according to the suction device 50, if it is transported by the detachable vehicle 51 to a place where suction work is necessary and placed at a predetermined position, the suction work can be performed as needed at a place away from the vehicle. . Further, when a predetermined amount of collection object is stored in the storage tank 3, the desorption vehicle 51 goes to the place where the suction device 50 is fixed, and the suction device 50 is placed on the desorption vehicle 51 and transported to a disposal place for storage. If the collected object to be collected is discarded and then transported by the desorption vehicle 51 to a place where suction work is required again, the suction work can be efficiently performed at that place as needed. An efficient use of the vehicle 51 is also possible.

  In the suction wheel 1 and the suction device 50 according to the above-described embodiment, the suction plate 19 and the suction plate 50 are configured to take in the air from the lower plate 60 and the front side plate 66 and exhaust the air from the upper plate 70. Thus, intake air from only the lower plate 60 and the front side plate 66 and exhaust from the front side plate 66 may be adopted, and the intake / exhaust position is not limited to this embodiment.

  Furthermore, the above-described embodiment shows an example, and various modifications can be made without departing from the gist of the present invention, and the present invention is not limited to the above-described embodiment.

  INDUSTRIAL APPLICABILITY The suction wheel and the suction device according to the present invention are useful for sludge recovery work and the like for reducing noise during suction work.

It is a side view which shows the suction wheel which concerns on one embodiment of this invention. It is a top view of the suction wheel shown in FIG. It is a rear view of the suction wheel shown in FIG. It is a systematic diagram which shows the flow of the air in the flow path in the suction wheel shown in FIG. It is drawing which shows the lower board of the soundproof cover in the suction vehicle shown in FIG. 1, (a) is a top view, (b) is VV sectional drawing shown to (a). It is a side view inside a soundproof cover except the left side plate of the soundproof cover in the suction vehicle shown in FIG. It is drawing from the front side inside a soundproof cover except the front side board of the soundproof cover in the suction vehicle shown in FIG. 1, and is VII-VII sectional drawing of FIG. (a), (b) is sectional drawing of the soundproof material in the front side board of the soundproof cover shown to FIG. It is a side view which shows the suction device which concerns on one embodiment of this invention. It is a side view which shows an example of the conventional suction wheel.

Explanation of symbols

1 ... Suction car
2 ... Body frame
3. Storage tank
4 ... Suction hose
5. Receiver rubber
6 ... 1st intake pipe
7 ... 1st water task rubber (upstream dust collector)
8 ... Tank
9 ... Second suction pipe 10 ... Silencer 11 ... Third intake pipe 12 ... Roots blower (suction force generator)
DESCRIPTION OF SYMBOLS 13 ... Drive mechanism 14 ... Suction engine 15 ... Base 17 ... Sub-frame 18 ... Anti-vibration mechanism 19 ... Soundproof cover 20 ... 1st exhaust pipe 21 ... 2nd water task rubber (downstream dust collector)
DESCRIPTION OF SYMBOLS 22 ... Open / close valve 23 ... Pressurization pipe 24, 25 ... Open / close valve 26 ... Upper support part 27 ... Tail gate 28 ... Open / close cylinder 29 ... Lower support part 30 ... Tilt cylinder 31 ... Suction port 32 ... Drain port 33, 34 ... Open / close valve 35 ... V belt 36 ... Drive pulley 37 ... Drive pulley 38 ... Tension adjustment mechanism 39 ... Guide member 40 ... Adjustment pulley 41 ... Adjustment shaft 42 ... Anti-vibration rubber 45 ... Bolt / nut 46 ... Second exhaust pipe 47 ... Load release air Inlet 48 ... Open / close valve 49 ... Rubber tube (flexible member)
DESCRIPTION OF SYMBOLS 50 ... Suction device 51 ... Desorption vehicle 52 ... Device frame 53 ... Support shaft 54 ... Sub-frame 55 ... Guide roller 56 ... Locking part 57 ... Hook part 58 ... Arm 60 ... Lower plate 62, 63 ... Intake port 64 ... Mounting part 65 ... Sound insulation wall 66 ... Front side plate 67 ... Rear side plate 68 ... Left side plate 69 ... Right side plate 70 ... Upper plate 71 ... Intake passage 72 ... Intake cover 73 ... Opening 74 ... Opening portion 75 ... Front sound insulation wall 76 ... Sound insulation material 78 ... Bulkhead 79 ... Exhaust passage 80 ... Control panel 81 ... Exhaust muffler 84 ... Opening 86 ... Radiator 87 ... Cooling fan
e ... Air flow
f ... Sound flow

Claims (8)

A suction vehicle that sucks and stores a collection object in a storage tank mounted on the vehicle,
A suction force generator for sucking air in the storage tank, a suction engine provided separately from a traveling engine for driving the suction force generator, and a drive for driving the suction force generator by the suction engine And a soundproof cover that covers the drive mechanism, the suction engine, and the suction force generator, and a suction port and an exhaust port are provided in the soundproof cover. And a suction wheel provided with a sound insulation wall that blocks sound transmitted outward from the inside of the soundproof cover.   The suction wheel according to claim 1, wherein the intake port and the exhaust port are opened upward and downward from the soundproof cover, and the sound insulating wall is provided at the intake port and the exhaust port.   An upstream dust collector through which air sucked into the suction force generator passes is provided between the storage tank and the suction force generator, and the exhaust of the suction force generator passes downstream of the suction force generator. A downstream dust collector is provided, and vibrations of the suction force generator are upstream of the flow path between the upstream dust collector and the suction force generator and the flow path between the suction force generator and the downstream dust collector. The suction wheel according to claim 1, further comprising a flexible member that prevents transmission to the side dust collector and the downstream dust collector.   The soundproof cover is composed of a lower plate located at a lower portion of the suction engine and a suction force generator, a side plate located at a side portion, and an upper plate located at an upper portion. The suction wheel according to any one of claims 1 to 3, wherein an intake port is provided and the side plate is provided with the exhaust port.   The suction wheel according to any one of claims 1 to 4, wherein a radiator of the suction engine is disposed at the exhaust port, and air passing through the radiator is exhausted from the opening.   6. The soundproof cover is provided with a partition wall to form an exhaust passage, a radiator of the suction engine is disposed in the partition wall facing the exhaust passage, and an upper portion of the exhaust passage is formed in the opening. Suction car.   The suction wheel according to any one of claims 1 to 6, wherein a soundproofing material for soundproofing different frequencies is provided on the inner surface of the soundproofing cover in combination in the thickness direction. A suction device including a device frame configured to be mountable on a detachable vehicle,
A storage tank that sucks and stores the object to be collected is provided in the apparatus frame, and is provided separately from a suction force generator that sucks air in the storage tank and a traveling engine that drives the suction force generator. A soundproof cover that covers the suction engine and a drive mechanism that drives the suction power generator with the suction engine, and the soundproof cover is provided with an intake port and an exhaust port. A suction device provided with a sound insulation wall that blocks the sound transmitted outward from the inside of the soundproof cover.

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