JP2006022568A - Sound insulating device and machining device equipped with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight sound insulating device having excellent attachment/detachment work efficiency and sound insulating property, and a machining device equipped with the sound insulating device. <P>SOLUTION: Sound insulating covers 30, 40 are provided for covering a rod 112 for transmitting driving force, and a bit 111 provided at the tip, respectively. The sound insulating cover 30 for the rod is a bellows tube of double cylinder structure comprising an external cover 31 formed of a cylindrical sound insulating sheet, and an internal cover 32 formed of a cylindrical heat insulating sheet. Heat from the rod 1 is intercepted by the internal cover 32, and emitted noise is insulated by the external cover 31. The sound insulating cover 40 for the bit also has a double cylinder structure and is formed to cover the bit 111 and an abutting part P on the machined object. Since the sound insulating cover is formed of a lightweight, flexible sheet, attachment/detachment work efficiency is excellent. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a technique for preventing noise during operation in an apparatus for processing ground or rocks.

  In a processing apparatus that uses a ground, rock, concrete structure, or the like as a processing object, such as a rock drilling apparatus or an excavator, noise generated during operation becomes a problem. Therefore, techniques for suppressing noise in these processing apparatuses have been proposed. For example, in the noise prevention apparatus described in Patent Document 1, a soundproof cover made up of multiple cylinders that are telescopically fitted is provided. Moreover, in the soundproofing device for a rock drill disclosed in Patent Document 2, a first cover that covers the rock drill body and a cylindrical second cover that covers the drill rod are provided.

Japanese Patent Laid-Open No. 11-22359 (FIG. 1) Japanese Patent Laid-Open No. 7-189581 (FIG. 6)

  In this type of soundproofing device, it is required to reduce the weight of the device and improve the workability of the attaching / detaching work. However, in conventional soundproofing devices, noise reduction effect is obtained by covering the place where the noise is generated with, for example, a metal plate or a composite material in which a vibration damping material such as rubber or lead is combined with this, further reducing weight In addition, it is difficult to improve workability.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a soundproof device that is lightweight and has excellent workability and soundproofness, and a processing apparatus including the same.

  A first aspect of the soundproofing device according to the present invention includes a processing unit that is attached to one end of an arm and that contacts the processing object to process the processing object, and a drive unit that drives the processing unit; In the soundproofing device mounted on a processing device having a ground or a rock as a processing object, the soundproofing device includes a transmission unit that extends along the arm and transmits a driving force from the driving unit to the processing unit. In order to achieve the above, it is composed of a heat insulating sheet formed in a cylindrical shape and covers an inner cover that covers the periphery of the transmission portion, and an outer cover that includes a sound insulating sheet formed in a cylindrical shape and covers the periphery of the inner cover. It is characterized by having.

  In addition, a second aspect of the soundproofing device according to the present invention includes a processing unit that is attached to one end of an arm and that is in contact with the processing target and processes the processing target, and a drive unit that drives the processing unit. And a soundproofing device that extends along the arm and includes a transmission unit that transmits a driving force from the driving unit to the processing unit, and is mounted on a processing device that uses ground or rock as a processing target. In order to achieve the above object, the insulating cover is formed of a heat insulating sheet formed in a cylindrical shape, and covers the periphery of the processed portion and a contact portion between the processed portion and the processing object, and a sound insulating material formed in the cylindrical shape. And an outer cover that covers the periphery of the inner cover.

  In order to reduce the weight of the soundproofing device of this type of processing device and improve the mounting workability, it is conceivable to use a sheet-like sound insulating material having flexibility. As such a sound insulating sheet, for example, a sheet obtained by bonding or mixing a vibration damping material such as rubber or lead fiber to a synthetic resin sheet has been developed. The inventor of the present application has conducted various experiments from this point of view, and as a result, it has become clear that the soundproof cover that has conventionally been formed of a metal plate or the like cannot be replaced by this type of sound insulating sheet as it is. It was. This is because, in this type of processing device, the transmission part and the processing part become hot due to frictional heat during operation, so if a heat-sensitive sheet comes into contact with these, there is a problem such as melting breakage or deterioration in soundproof performance. Because there is.

  Therefore, the above-described invention adopts a double structure in which a transmission portion or a processing portion that is a noise generation source is first covered with a heat insulating sheet and further covered with a sound insulating sheet. By doing so, the above-described problem of high heat can be solved and a soundproofing device using a sound insulating sheet can be configured. Therefore, according to the above invention, it is possible to provide a soundproofing device that is lightweight, has good detachability, and has excellent soundproofing performance. In addition, the second aspect of the soundproofing device according to the present invention has an effect of preventing rock fragments and sand dust crushed by the processing portion from being scattered around.

  In these inventions, an air layer may be provided between the inner cover and the outer cover. As described above, by providing an air layer between the inner cover and the outer cover without closely contacting each other, propagation of heat and noise from the inner cover to the outer cover is suppressed, so that deterioration of the sound insulating sheet due to heat can be suppressed. At the same time, the noise suppression effect is improved. In this case, it is not necessary to configure the inner and outer covers so as not to contact at all. For example, both may be in partial contact, or may be partially joined by adhesion or stitching. The inner cover and the outer cover may be formed in a bellows shape. In this case, since it can expand and contract in the axial direction of the bellows tube, it can be easily transported and stored. Moreover, since it becomes difficult to deform | transform in radial direction, a cylindrical shape can be kept easily at the time of use.

  The processing apparatus according to the present invention is a processing apparatus that uses the ground or rock as a processing object, and is attached to one end of an arm and brought into contact with the processing object to achieve the above-described object. A processing unit that processes an object, a driving unit that drives the processing unit, a transmission unit that extends along the arm and transmits a driving force from the driving unit to the processing unit, and each of the inventions described above And a soundproofing device according to any one of the above.

  In the processing apparatus configured as described above, since the transmission unit and / or the processing unit, which are noise generation sources, are soundproofed by the above-described soundproofing device, noise generated during the processing operation can be suppressed to a low level. In addition, since the soundproofing device is lightweight and has excellent detachability, it is possible to perform detachment and replacement of the parts of the transmission section and the processing section with excellent operability.

  As described above, according to the present invention, the soundproofing device that covers the transmission unit and / or the processing unit, which is a noise generation source, has a double structure of an inner cover made of a heat insulating sheet and an outer cover made of a sound insulating sheet. Therefore, it is possible to construct a soundproofing device that is lightweight and has good workability for attaching and detaching, and excellent in soundproofing performance, and a processing device including the same.

(First embodiment)
FIG. 1 is a view showing an external appearance of a rock drill equipped with a soundproof cover according to the present invention. In the rock drill 1, the rock drill main body 10 is attached to one end side of the arm 121. The other end of the arm 121 is provided with a weight-like bit 111 for crushing a workpiece such as a rock or a concrete structure. The bit 111 is engaged with a piston 101 provided in the rock drill main body 10 via a rod 112 extending along the arm 121. Then, when the rock drill main body 10 is actuated based on a control command given from an operation panel (not shown) according to the operation of the operator, the piston 101 reciprocates in the direction of the arrow shown in FIG. The hit is transmitted to the bit 111 via the rod 112, and the tip of the bit 111 crushes the rock.

  Thus, in this embodiment, the rock drill 1 corresponds to the “processing device” of the present invention in which a rock or the like is an object to be processed. Further, the rock drill main body 10, the bit 111, and the rod 112 function as the “driving unit”, “processing unit”, and “transmission unit” of the present invention, respectively. The rock drill 1 is used by being mounted on, for example, a boom of a self-propelled vehicle. However, as such a vehicle, a publicly known one can be used. The description of the configuration will be omitted.

  In the rock drill 1, a main body cover 20 that covers the rock drill main body 10 is provided in order to suppress propagation of noise generated during operation of the rock drill main body 10 to the surroundings. The main body cover 20 is formed by attaching a soundproof sheet 22 to be described later to the inner surface of a box 21 formed of an iron plate. Although not shown, the space inside the main body cover 20 is filled with a filler made of heat-resistant fibers such as rock wool and glass wool. As such a filler, for example, a ceramic blanket (trade name) manufactured by Takumi Sangyo Co., Ltd. can be preferably used. By filling such a filler, the noise suppression effect can be further enhanced. Moreover, since the rock drill main body 10 becomes high temperature during operation, the filler is required to have heat resistance.

  Soundproof covers 30 and 40 are provided so as to cover the rod 112 and the bit 111, respectively. Among these, the soundproof cover 30 for the rod suppresses the noise generated from the rod 112 due to being struck by the piston 101 from being propagated to the surroundings. Moreover, the soundproof cover 40 for bits suppresses the propagation of noise that is generated when the bit 111 strikes a workpiece such as rock.

  FIG. 2 is a view showing the structure of the soundproof cover according to the present invention. FIG. 3 is a view showing a cut surface of the soundproof cover for the rod. As shown in FIGS. 2 and 3, the soundproof cover 30 for the rod is formed in a bellows tube covering the rod 112. The bellows tube has a double cylinder structure including an outer cover 31 made of a sound insulating sheet formed in a cylindrical shape and an inner cover 32 made of a heat insulating sheet also formed in a cylindrical shape. In addition, the outer cover 31 and the inner cover 32 are partially sewn and joined, but they are not completely in close contact with each other, and there is a slight gap G1 between them to form an air layer. Yes.

  The soundproof cover 40 for the bit covers the inner cover 42 made of a heat insulating sheet wound around the outer periphery of the centralizer 122 attached to the arm 121 and performing the positioning function of the bit 111, and further covers the outside. The outer cover 41 is made of a sound insulating sheet that is wound in such a manner as to have a double cylinder structure. A gap G <b> 2 is provided between the outer cover 41 and the inner cover 42. Each of the outer cover 41 and the inner cover 42 is formed so as to completely cover the periphery of the contact portion P between the bit 111 and the processing object in a state where the bit 111 is in contact with the processing object (such as rock). Yes. By doing so, the impact sound generated at the abutting portion P is suppressed from being propagated to the surroundings.

  Thus, each of the soundproof covers 30 and 40 in this embodiment has a double cylinder structure of an outer cover made of a sound insulating sheet and an inner cover made of a heat insulating sheet. The reason for this will be described.

  This type of soundproof cover is conventionally formed of a metal plate or the like, but in recent years, a sheet-like material having high sound insulation properties has been commercialized. If such a sound insulating sheet is used as a soundproof cover, it is possible to achieve a significant weight reduction. Further, by using a flexible sheet, the workability of the attachment / detachment work is greatly improved, and the storage becomes easy. Actually, the inventors of the present application conducted various experiments and found that a sufficient noise suppression effect can be obtained by using such a sound insulating sheet as a material for the soundproof cover.

  However, since the rod 112 is struck violently between the piston 101 and the bit 111 against the rock, the rod 112 and the bit 111 are hot during operation of the rock drill 1. Therefore, there arises a problem that a soundproof cover formed of a heat-resistant material such as a conventional metal plate cannot be replaced as it is by a sound-insulating sheet that is lighter and more flexible but inferior in heat resistance. In the conventional noise suppression technology, since there is no idea that the soundproof cover is made of such a sheet-like material, such a problem of damage to the soundproof cover due to heat has not been considered at all.

  Therefore, as in this embodiment, if a high-temperature noise source is first covered with a heat-insulating sheet and the outside is further covered with a sound-insulating sheet, a lightweight and flexible soundproof cover made of a sheet-like material can be obtained. In addition, there is no problem that the sound insulating sheet is deteriorated by heat. In addition, the double-cylinder structure increases the noise suppression effect. In particular, if the outer cover and the inner cover are not completely integrated and an air layer is provided between them, the effect of heat insulation and sound insulation is further increased. Become.

  Moreover, since the soundproof cover 30 for rods is formed in the bellows tubular shape, it can hold | maintain the shape to some extent, without providing a holding mechanism in particular. Therefore, the structure of the cover and its attachment mechanism is simplified, and the weight can be further reduced. In addition, the possibility that the soundproof cover 30 may be damaged by contact with the rod 112 due to deformation such as twisting can be suppressed. Furthermore, since it has elasticity in the axial direction, it can be folded small when not in use, but can be stretched when in use, so that it is easy to handle. Therefore, attachment to the arm 121 and removal from the arm 121 can be performed with good workability.

  Further, in the bit soundproof cover 40, since the cover is formed of a flexible sheet, the cover adheres well to the surface of the workpiece, and sound leakage from the gap between the cover and the workpiece is present. Can be kept small. Furthermore, it has the effect of suppressing the fragments and dust of the crushed workpiece to soar. It should be noted that the outer cover 41 and the inner cover 42 constituting the soundproof cover 40 are prevented from being damaged by rubbing with respect to the end portion (the lower end portion in FIG. 2) in contact with the processing target surface. For example, a rubber edge may be further attached, or the end may be formed in a fringe shape.

  FIG. 4 is a cross-sectional view showing an example of a sound insulating sheet. FIG. 5 is a cross-sectional view showing an example of a heat insulating sheet. In this embodiment, as the external covers 31 and 41, those manufactured by various companies as “soundproof sheets” can be used. In this case, it is not necessary that the sheet has high heat resistance. As the sound insulating sheet, for example, a vinyl sheet coated with a vibration damping material such as lead or rubber, laminated, or mixed can be used. For example, as shown in FIG. 4, a sheet 200 in which vinyl chloride 202 is integrated with a nonwoven fabric 201 made of lead fibers as a core material can be used. As such a product, for example, Toray soundproof material FC series (Product name).

  Moreover, as a heat insulation sheet which comprises the inner covers 32 and 42, as shown, for example in FIG. 5, it has heat resistance, for example, the heat-transfer layer 301 which consists of metal foil, such as aluminum, for example, glass fiber, an aramid fiber, etc. A sheet 300 formed by laminating a fabric layer 302 woven with fibers can be used. In this case, when formed in a cylindrical shape, it is desirable from the viewpoint of the heat insulation effect that the surface of the sheet 300 on which the metal foil is attached is on the inside. As such a sheet material, for example, a dual mirror (registered trademark) fabric manufactured by Gentex can be used.

  As described above, the soundproof cover according to the present invention adopts the double structure of the inner cover formed of the heat insulating sheet and the outer cover formed of the sound insulating sheet. Thus, by using the soft sheet material, it is possible to configure a soundproof cover that is lightweight and excellent in workability during attachment and detachment. Moreover, since the heat insulating sheet is used as the inner cover, it is possible to prevent the heat generated in the noise generation source from deteriorating the outer cover. And since the external cover which covers the outer side is comprised with the sound-insulating sheet | seat, a high noise suppression effect can be acquired.

  In addition, since the soundproof cover 30 covering the rod 112 has a bellows shape, it is easy to hold the shape, and can be folded small, so that it can be easily transferred and detached, and is convenient in terms of storage. Moreover, in the soundproof cover 40 that covers the bit 111, the soundproof cover is configured by a flexible sheet material, so that the gap with the processing target surface can be reduced to reduce sound leakage.

  In addition, since the soundproof cover has a double cylinder structure, the heat insulating property and the sound insulating property can be individually obtained for each sheet material, so that the degree of freedom in selecting the sheet material is high. Therefore, for example, by appropriately selecting and combining materials according to required specifications such as sound insulation performance, cost, and weight, a soundproof cover that meets various user requirements can be provided.

  And by providing the soundproof cover comprised in this way, the noise which arises at the time of operation | movement of processing apparatuses, such as a rock drill, can be suppressed. In addition, since the structure of the soundproof cover is simple and lightweight, maintenance work such as replacement of a bit and a rod can be performed with good workability.

(Second Embodiment)
FIG. 6 is a view showing another embodiment of the soundproof cover according to the present invention. In this embodiment, a soundproof cover according to the present invention is attached to a hydraulic breaker. In the hydraulic breaker 400, the bit 411 is driven by an oil flow that flows through a pipe 401 from a hydraulic pump (not shown). That is, in this embodiment, the pipe 401 provided along the arm 421 and the oil flow flowing through the pipe 401 function to transmit the driving force. In such an apparatus, since the noise emitted from the pipe 401 is small, it is not necessary to cover the pipe 401 with a soundproof cover.

  However, since the bit 411 corresponding to the “processed portion” of the present invention generates a loud hitting sound, the soundproof cover 440 having the same configuration as the bit soundproof cover 40 in the first embodiment is used for this portion. Provided. In other words, the soundproof cover 440 has a double cylinder structure of an outer cover made of a sound insulating sheet and an inner cover made of a heat insulating sheet so as to cover the abutting portion between the bit 411 and its processing target surface. In addition, it is wound around the head 410 of the breaker.

  By doing in this way, it is possible to prevent effectively the noise which generate | occur | produces when the bit 411 hits a workpiece, and the scattering of a fragment. As described above, the present invention transmits not only the device that mechanically transmits the driving force of the bit by the reciprocating motion of the rod as in the first embodiment, but also the hydraulic force as in the second embodiment. The present invention can also be suitably applied to an apparatus.

(Other variations)
The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention. For example, the device of the first embodiment is a rock drilling device that transmits the reciprocating motion of the piston 101 provided in the rock drill main body 10 to the bit 111 by the rod 112 and crushes the rock by hitting the bit 111. However, the application target of the present invention is not limited to this. For example, the present invention can be applied to an apparatus for drilling a ground, a rock, or a concrete structure to which another tip tool such as a drill or a crawler drill is attached.

  Further, in the first embodiment described above, the tip end portion of the rod 112 is the bit 111, which is an example in which the “processed portion” and the “transmitting portion” referred to in the present invention are integrated. Needless to say, it may be formed as a body.

  Further, as a method of transmitting the driving force to the tip tool, the present invention can be applied to an apparatus of a type that transmits the driving force by a chain, for example, in addition to the above-described rod. Moreover, you may transmit a driving force by rotation of a rod.

  The present invention can be applied to a processing apparatus that performs processing such as crushing and drilling on processing objects such as ground, rocks, and concrete structures.

It is a figure which shows the external appearance of the rock drill provided with the soundproof cover concerning this invention. It is a figure which shows the structure of the soundproof cover concerning this invention. It is a figure which shows the cut surface of the soundproof cover for rods. It is sectional drawing which shows an example of a sound insulation sheet. It is sectional drawing which shows an example of a heat insulation sheet. It is a figure which shows other embodiment of the soundproof cover concerning this invention.

Explanation of symbols

1 ... Rock drill (processing equipment)
10 ... Main body of rock drill (drive unit)
20 ... Body cover 30 ... Soundproof cover for rod 31 ... Sound insulation sheet (external cover)
32 ... Insulating sheet (inner cover)
40 ... Soundproof cover for bit 41 ... Sound insulation sheet (external cover)
42 ... Insulating sheet (inner cover)
111 ... bit (processing part)
112 ... Rod (Transmission part)
400 ... Hydraulic breaker (processing device)
121, 421 ... arm 411 ... bit (machined part)
440 ... Soundproof cover

Claims (5)

A processing unit that is attached to one end of the arm and contacts the processing object to process the processing object, a driving unit that drives the processing unit, and extends along the arm. In a soundproofing device that is mounted on a processing device that uses the ground or rock as a processing target, and a transmission unit that transmits the driving force of
An inner cover that is formed of a heat-insulating sheet formed in a cylindrical shape and covers the periphery of the transmission unit;
A soundproofing device, comprising: a sound insulating sheet formed in a cylindrical shape, and an outer cover that covers the periphery of the inner cover. A processing unit that is attached to one end of the arm and contacts the processing object to process the processing object, a driving unit that drives the processing unit, and extends along the arm. In a soundproofing device that is mounted on a processing device that uses the ground or rock as a processing target, and a transmission unit that transmits the driving force of
An inner cover that is formed of a heat-insulating sheet formed in a cylindrical shape and covers the periphery of the processed portion and the contact portion between the processed portion and the processing target;
A soundproofing device, comprising: a sound insulating sheet formed in a cylindrical shape, and an outer cover that covers the periphery of the inner cover.   The soundproofing device according to claim 1 or 2, wherein an air layer is provided between the inner cover and the outer cover.   The soundproofing device according to any one of claims 1 to 3, wherein the inner cover and the outer cover are formed in a bellows tubular shape. In processing equipment that uses the ground or rock as the processing object,
A processing unit that is attached to one end of the arm and contacts the processing object to process the processing object;
A drive unit for driving the processing unit;
A transmission unit extending along the arm and transmitting a driving force from the driving unit to the processing unit;
A processing apparatus comprising the soundproofing device according to claim 1.

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