JP4161116B1 - Soundproofing device and processing device - Google Patents

Abstract

Provided are a lightweight, excellent detachable workability and soundproofing property, and a low-cost soundproofing device and a processing device equipped with the soundproofing device.
A cylindrical heat insulating cover 32 is attached so as to cover a sleeve 102 that couples a shank rod 101 of a drifter and a rod 112 having a processing bit 111. A bellows tubular soundproof cover 31 made of a flexible sheet-like material is attached so as to cover the periphery of the heat insulating cover 32 and the rod 112. The high heat generated from the sleeve 102 is blocked by the heat insulating cover 32 and the soundproof cover 31 is prevented from being damaged by the heat. Moreover, since the heat insulation cover 32 is removable separately from the soundproof cover 31, when the heat insulation cover 32 deteriorates, it is only necessary to replace the heat insulation cover 32.
[Selection] Figure 2

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. In order to cope with this problem, the applicant of the present application has previously disclosed a technique for suppressing noise generated in these processing apparatuses (see Patent Document 1). In this technique, the rod is covered with a double tube of an internal cover having heat resistance and an external cover having soundproofing, thereby constituting a soundproofing device that is lightweight and has excellent workability and soundproofing.

JP 2006-022568 A (FIG. 2)

  In the above prior art, it is necessary to form two kinds of sheet-like materials into a double bellows tubular shape, and it is necessary to replace the entire apparatus even when a part of the inner cover is damaged. There was room for improvement in terms of cost.

  The present invention has been made in view of the above problems, and an object thereof is to provide a low-cost soundproofing device and a processing device including the same, which are lightweight, excellent in detachable workability and soundproofing properties.

  The inventor of the present application has further advanced research based on the technique disclosed in Patent Document 1 and has obtained the following knowledge. That is, in a processing apparatus that processes a processing object such as a rock by attaching a rod to a drifter, the coupling member that couples the drifter and the rod releases heat energy due to friction, so that the coupling member has a particularly high temperature. Become. For this reason, in the soundproof cover that covers the entire coupling member and the rod, the vicinity of the coupling member is particularly easily damaged by heat, while the portion away from the coupling member is hardly damaged by heat. From this, it was found that high heat resistance is required only in the vicinity of the coupling member. In addition, if the cover damaged by heat is examined carefully, when the soundproof cover is constructed by sewing sheet-like material, even if the sheet itself has heat resistance, the stitches may open or shape due to damage to the sewing thread. It was found that there are many cases that can not keep.

  In view of this point, a soundproofing device according to the present invention mechanically connects a rod having a processing portion for processing ground or rock at one end, a drifter that drives the rod, and the drifter and the other end of the rod. In order to achieve the above object, the soundproofing device is attached to a processing device having a coupling member to be coupled, and is formed in a cylindrical shape and has an inner surface having heat insulation properties, and covers the coupling member, while the rod And a heat-insulating cover that covers the heat-insulating cover and the rod, and is formed by sewing a sheet material having flexibility into a cylindrical shape.

  In the invention configured as described above, the heat insulating cover that covers the coupling member having the highest temperature is provided to prevent damage to the soundproof cover due to heat. In addition, noise transmission to the outside is prevented by covering the heat insulating cover and the rod with a soundproof cover. That is, according to the present invention, the heat insulation cover is interposed between the soundproof cover for preventing the propagation of noise and the coupling member that generates high heat, thereby preventing deterioration and damage of the soundproof cover due to the heat of the coupling member. Further, since the soundproof cover is formed of a sheet material, it is possible to configure a soundproof device that is lightweight and has excellent workability. In addition, since the heat insulating cover only needs to cover the coupling member, the heat insulating cover can be made compact, and the entire cover does not need to be a double tube, so that the manufacturing cost can be kept low.

  Here, when the space between the soundproof cover and the heat insulation cover is detachable, for example, when the heat insulation cover deteriorates or is damaged due to long-term use, it is possible to remove and replace only the heat insulation cover. Since it is not necessary to replace the whole, the running cost of the apparatus can be greatly reduced.

  The soundproof cover may be configured as a bellows tube that can expand and contract in the longitudinal direction of the rod. If it does in this way, it will become easy to hold a soundproof cover in the shape of a cylinder. In addition, it is possible to improve the convenience of handling the soundproof cover when it is detached from the processing apparatus. Further, even when the drifter is moved forward / backward in the processing direction as the processing proceeds, the soundproof cover can always cover the entire rod and extend the soundproofing effect. In this case, the heat insulating cover that covers the coupling member does not need to be stretchable, so that it is not necessary to have a bellows tubular shape, thereby further reducing the manufacturing cost of the device.

  The bellows tube may be formed by stitching a plurality of sheet-like materials cut into an annular shape. By setting it as such a structure, a planar sheet material can be assembled in the shape of a three-dimensional bellows tube. More specifically, a tubular structure can be formed by laminating a large number of concentric sheet-like materials and stitching adjacent sheets together. By alternately performing stitching between layers, a bellows tube that can be expanded and contracted along the stacking direction can be formed.

  In addition, for the heat insulating cover, at least one surface has heat insulating properties and the heat insulating sheet cut into a substantially rectangular shape is overlapped at both ends so that the heat insulating surface becomes the inner surface of the cylinder. A stitched structure may be used. In this way, by configuring the heat insulating cover with a sheet-like material, the apparatus can be made lightweight and easy to handle. In this case, since the purpose of not transmitting the heat of the coupling member to the soundproof cover is achieved by setting the heat insulating surface of the heat insulating sheet as the inner surface of the cylinder, the surface that hits the outer surface of the cylinder must always have heat insulating properties. There is no.

  Furthermore, at the joint of the heat insulating sheet, it is desirable that both ends of the heat insulating sheet are overlapped so that surfaces connected to the inner surface of the cylinder face each other. If it does in this way, the seam which stitch | sutures both ends of a heat insulation sheet can be made not to expose to the inside of the pipe | tube which faces the coupling member which becomes high heat | fever. By doing so, it is possible to suppress deterioration and damage of the heat insulating cover due to deterioration of the sewing thread for sewing the sheets. Further, since the sewing thread does not require heat resistance, the manufacturing cost can be reduced.

  In order to achieve the above object, a processing apparatus according to the present invention has a rod having a processing portion for processing ground or rock at one end, a drifter that drives the rod, the drifter body, and the other end of the rod. A coupling member that is mechanically coupled to each other, and an inner surface of the coupling member that has a heat insulation property, covers the coupling member, and exposes the rod, and a flexible sheet-like material. It is formed by sewing into a cylindrical shape, and includes a heat insulating cover that covers the heat insulating cover and the rod.

  In the invention configured as described above, it is possible to suppress the noise during the work from being propagated outside by covering the coupling member and the rod with the soundproof cover. In addition, since the heat insulating cover is provided between the coupling member that becomes high temperature during operation and the soundproof cover, deterioration and damage of the soundproof cover due to heat can be prevented, and the running cost of the apparatus can be suppressed. Moreover, since it is only necessary to cover only the coupling member with respect to the heat insulating cover, it is not necessary to make the entire cover a double tube structure, and the manufacturing cost can be kept low.

  As described above, according to the present invention, it is possible to suppress the propagation of noise during work to the outside by covering the rod with the soundproof cover. In addition, since the periphery of the coupling member that becomes high during operation is covered with a heat insulating cover, deterioration and damage of the soundproof cover due to heat can be suppressed. Since the soundproof cover is formed of a sheet material, it is lightweight and easy to attach and detach, and the heat insulating cover is small and does not need to have a double-pipe structure for the entire cover.

  FIG. 1 is a diagram showing an external appearance of a rock drill equipped with a soundproofing device according to the present invention. In this rock drill 1, a drifter 10 as a rock drill main body is attached to one end side of an arm 121. The other end of the arm 121 is provided with a bit 111 for crushing a workpiece such as a rock or a concrete structure. The bit 111 is engaged with a shank rod 101 provided on the drifter 10 via a rod 112 extending along the arm 121. The shank rod 101 and the rod 112 are mechanically coupled by a coupling sleeve 102. Then, when the drifter 10 is operated based on a control command given from an operation panel (not shown) according to the operation of the operator, the shank rod 101 reciprocates or rotates to drive the rod 112, and this driving force causes the rod 112 to move. And the tip of the bit 111 crushes or drills rocks or the like.

  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. 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 drifter 10 is provided in order to suppress propagation of noise generated when the drifter 10 is operated to the surroundings. The main body cover 20 has a soundproof sheet 22 attached 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. Further, since the drifter 10 becomes high temperature during operation, the filler is required to have heat resistance.

  Soundproof covers 31 and 40 are provided so as to cover the rod 112 and the bit 111, respectively. Among these, the soundproof cover 31 for the rod suppresses the noise generated from the rod 112 from being propagated to the surroundings. A heat insulating cover 32 is provided so as to cover the periphery of the sleeve 102 inside the soundproof cover 31. The heat insulating cover 32 has a function of protecting the soundproof cover 31 from heat generated in the sleeve 102 as the shank rod 101 is operated. The bit soundproof cover 40 suppresses the propagation of noise generated when the bit 111 strikes or cuts a workpiece such as a rock.

  FIG. 2 is a sectional view showing the structure of the soundproofing device according to the present invention. FIG. 3 is an exploded view showing the structure of the soundproof cover for the rod. As shown in FIG. 2, the soundproof cover 31 for the rod is formed in a bellows tubular shape that covers the rod 112. In addition, a substantially cylindrical heat insulating cover 32 is provided inside the soundproof cover 31 for the rod so as to cover the periphery of the sleeve 102. As a material constituting the soundproof cover 31 for the rod, a sheet-like material having heat resistance and flexibility can be used. Moreover, as a raw material which comprises the heat insulation cover 32, it is necessary for the surface which hits the inner surface of a cylinder at least to have high heat insulation. As such a material, it is possible to use a heat insulating sheet formed by laminating a heat insulating layer made of a metal foil such as aluminum and a fabric layer woven from fibers having heat resistance such as glass fiber and aramid fiber. it can. In this case, it is desirable from the viewpoint of the heat insulation effect that the surface of the sheet surface on which the metal foil is affixed is the inside when formed into a cylindrical shape. As such a sheet material, for example, a dual mirror (registered trademark) fabric manufactured by Gentex can be used. Further, this material can also be used for the soundproof cover 31 for the rod.

  The bellows tubular soundproof cover 31 formed of such a sheet-like material is extendable in the axial direction of the rod 112 (vertical direction in FIGS. 2 and 3). Therefore, in order to prevent the bellows tube from extending due to its own weight and to maintain the shape of the bellows tube, four belts 33 that connect the mountain portions of the bellows tube along the axial direction are provided on the outer surface of the soundproof cover 31. Are attached at equiangular (90 degree) intervals. The belt 33 can be made of a strong cloth or leather that is strong against pulling, and can be made of the same material as the soundproof cover 31 or the heat insulating cover 32 described above.

  The heat insulating cover 32 is fitted into a rim portion 20a projecting downward provided in an opening for penetrating the shank rod in the main body cover 20 covering the drifter 10, and further, a soundproof cover so as to cover the outside of the heat resistant cover 32 31 is mounted. Then, the fastening belt 35 attached so as to surround the rim portion 20a fastens each portion hatched in FIG. 3, whereby the soundproof cover 31 and the heat insulating cover 32 are fixed to the main body cover 20. On the other hand, by loosening the fastening belt 35, the soundproof cover 31 and the heat insulating cover 32 can be removed from the main body cover 20, respectively. Thus, in this embodiment, the soundproof cover 31 and the heat insulation cover 32 are comprised separately and can be removed. In addition, it is good also as a structure which can temporarily fix the heat insulation cover 32 with respect to the soundproof cover 31 for the attachment workability improvement.

  The soundproof cover 40 for the bit covers the inner cover 43 made of a heat insulating sheet wound around the outer periphery of the centralizer 122 that is attached to the arm 121 and performs 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 43. Each of the outer cover 41 and the inner cover 43 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.

  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 reduced. Can be suppressed. Furthermore, it has the effect of suppressing the fragments and dust of the crushed workpiece to soar. In addition, about the edge part (lower edge part in FIG. 2) of the side which contacts the process target surface in the outer cover 41 and the inner cover 43 which comprise the soundproof cover 40, while preventing damage by abrasion, and the process target surface, For example, a rubber edge may be further attached, or the end may be formed in a fringe shape.

  FIG. 4 is an exploded view showing a detailed structure of the soundproof cover for the rod. FIG. 5 is a partial sectional view showing a detailed structure of the soundproof cover for the rod. The soundproof cover 31 is obtained by stitching a cylinder 310 formed of the above-described heat insulating sheet and a plurality of annular sheets 311, 312,... Formed by cutting the heat insulating sheet into an annular shape. In the figure, six annular sheets 311 to 316 are shown, but this shows a part of the annular sheet constituting the soundproof cover 31, and actually more annular sheets. Thus, a bellows tube is formed, and the required number varies depending on the length of the bellows tube.

  The cylinder 310 is obtained by rounding a heat-insulating sheet cut into a strip shape and stitching both ends so that a surface having heat insulation becomes an inner surface 310a. The lower end portion of the cylinder 310 and the inner peripheral portion of the annular sheet 311 are joined by stitching. At this time, the annular sheet 311 has a heat insulating surface (hereinafter referred to as “heat insulating surface”) 311a facing downward, in other words, a heat insulating surface to which the metal foil shown by hatching in FIG. Is sewn to the cylinder 310 with a surface (hereinafter referred to as a “non-heat-insulating surface”) 311b opposite to the cylinder 310 facing the cylinder 310. In FIG. 5, the broken line indicates the position of the seam.

  On the other hand, the outer peripheral part of the annular sheet 311 is joined to the outer peripheral part of the annular sheet 312 located below by sewing. At this time, with respect to the annular sheet 312, the heat insulating surface 312a faces upward. That is, the annular sheets 311 and 312 whose outer peripheral portions are sewn are arranged so that the heat insulating surfaces 311a and 312a face each other.

  Further, the inner peripheral portion of the annular sheet 312 is stitched to the inner peripheral portion of the annular sheet 313 positioned below the annular sheet 312. Since the annular sheet 313 is disposed with the non-insulating surface 313b facing upward, the annular sheets 312 and 313 having the inner peripheral portions sewn together are sewn so that the non-insulating surfaces 312b and 313b face each other. Will be.

  Similarly, the outer periphery of the annular sheet 313 is the outer periphery of the next sheet 314, the inner periphery of the sheet 314 is the inner periphery of the sheet 315, and the outer periphery of the sheet 315 is the outer periphery of the next sheet 316. , Each is sutured. For this reason, the cross-sectional shape of the peripheral wall of the soundproof cover 31 is zigzag as shown in FIG. 5, and each annular sheet 311 has flexibility, so that the entire soundproof cover 31 expands and contracts in the vertical direction of FIG. It becomes a free bellows tube.

  In addition, the two heat insulating surfaces face each other between the two annular sheets stitched together at the outer peripheral portions, while the non-circular surfaces between the two annular sheets stitched between the inner peripheral portions. Since the heat insulating surfaces face each other, almost all of the inner surface of the tube is constituted by the heat insulating surface regardless of the stretched state of the bellows tube. Conversely, the outer surface of the bellows tube is almost entirely constituted by a non-insulating surface. By doing so, even when the inside of the soundproof cover 31 is at a high temperature, the heat is suppressed from being transmitted to the outside of the cover. Moreover, deterioration of the soundproof cover 31 due to heat is suppressed. In the soundproof cover having such a structure, if the sheet is torn or a gap is formed at the joint, sound leakage occurs and the effect is diminished. In this embodiment, the inner surface of the soundproof cover has a heat insulating structure to prevent damage to the sheet due to heat.

  However, in the configuration of FIG. 5, it is inevitable that a part of the sewing thread for sewing the annular sheets, particularly the inner peripheral parts thereof, is exposed in the bellows tube, and the sewing thread may be damaged by heat. Actually, the inventor of the present application conducted various experiments by attaching the cover having such a structure to a rock drill, and the sewing thread exposed on the inner surface of the cover was damaged by heat even though the sheet was not damaged. Many events were found in which gaps were formed between the annular sheets. In order to avoid this problem, both ends of the sheet are joined with a metal wire instead of the sewing thread. However, although the metal generally has heat resistance, the heat itself is high, so the wire itself becomes high temperature and damages the sheet. There was a thing.

  Such damage due to heat frequently occurs in the vicinity of the sleeve 102 at the highest temperature, but was hardly observed at a position away from the sleeve. Therefore, in this embodiment, by providing the heat insulating cover 32 so as to cover the periphery of the sleeve 102, the soundproof cover 31 is prevented from directly facing the sleeve 102, thereby preventing the soundproof cover 31 from being deteriorated or damaged by heat. ing.

  FIG. 6 is a view showing a cross-sectional structure of the heat insulating cover. The heat insulating cover 32 of this embodiment has a cross-sectional structure shown in FIG. More specifically, the heat insulating cover 32 is formed by rounding a heat insulating sheet cut into a substantially rectangular shape into a cylindrical shape and sewing the both ends together. At this time, the heat insulating surface 32a of the heat insulating sheet is made to be the inner surface of the cylinder, and the non-heat insulating surface 32b is made to be the outer surface of the cylinder. Moreover, in the joining part 32c which joined both ends, the both heat insulating surfaces are made to face each other by making both ends overlap and sew together in a state where each end protrudes outward. In FIG. 6, the broken line indicates the position of the seam.

  By doing so, in addition to the fact that the inner surface of the cylinder is entirely constituted by the heat insulating surface 32a of the heat insulating sheet, a structure in which the seam S1 of the sheet is not exposed to the space SP inside the cylinder can be obtained. Thereby, the problem of deterioration of the sewing thread due to heat is solved, and the heat insulating cover 32 can have high heat insulating properties and durability against heat. In addition, since the sewing thread does not require high heat resistance, it is not necessary to use a special sewing thread, which is preferable in terms of cost. Further, when a sewing thread having high heat resistance is used, the life of the cover can be extended.

  On the other hand, FIG.6 (b) has shown the comparative example of the heat insulation cover. In this comparative example, the heat insulating sheet 329 is simply rolled into a cylindrical shape and both ends thereof are stitched. That is, at the seam 329c, both ends of the sheet are overlapped so that the heat insulating surface 329a that contacts the inner surface of the cylinder and the non-heat insulating surface 329b are in contact with each other. In such a structure, the seam S2 is exposed in the cylinder, and the sewing thread may be damaged by the heat of the sleeve 102 and a gap may be formed in the sheet. Therefore, the structure shown in FIG. preferable.

  By the way, the sleeve 102 is further heated by being covered with the soundproof cover, and sometimes reaches several hundred degrees Celsius. Therefore, even with the heat insulating cover 32 configured as described above, it can be considered that the heat insulating cover 32 gradually deteriorates with long-term use. Therefore, in this embodiment, the soundproof cover 31 and the heat insulating cover 32 are not integrated, but are formed separately and are detachable from each other. By doing so, it becomes possible to replace only the heat insulating cover 32 when the heat insulating cover 32 deteriorates. Thereby, a running cost can be reduced significantly compared with the case where the whole soundproofing apparatus is replaced | exchanged. Further, since the heat insulating cover 32 prevents the soundproof cover 31 from being damaged by heat, the soundproof cover 31 can have a long life, and this point also has an advantageous effect on running cost.

  As apparent from FIGS. 1 to 3, the heat insulating cover 32 is much smaller and simpler than the soundproof cover 31, so that the ratio of manufacturing cost to the whole soundproof device is small. Thus, the reduction effect of the running cost is further increased by adopting a structure in which the heat insulating cover 32 that can be manufactured at a low cost is replaceable.

  Since the soundproofing device configured as described above is a bellows-like tube formed of a flexible sheet, the soundproofing cover 31 can be expanded and contracted in the longitudinal direction (axial direction). This contributes to the convenience of handling the cover as described above and also has the following effects.

  FIG. 7 is a diagram showing a change in the shape of the soundproof cover as the drilling operation progresses. In the initial stage of the work, as shown in FIG. 7A, the main body cover 20 containing the drifter 10 is on the upper part of the arm 121, so that the soundproof cover 31 is in an extended state. On the other hand, when the drilling advances and the bit 111 enters the ground, the soundproof cover 31 contracts as the drifter 10 descends along the arm 121 as shown in FIG. The soundproofing device can obtain a stable soundproofing effect from the beginning to the end of the drilling operation without interfering with the operation.

  At this time, since the sleeve 102 does not advance to near the processed portion of the ground surface, the heat insulating cover 32 does not need to be stretchable. Thus, in this embodiment, since the heat insulating cover 32 is configured to cover only the vicinity of the sleeve 102, the heat insulating cover 32 does not need to have elasticity like the soundproof cover 31, and is, for example, cylindrical. A simple structure is sufficient. Thereby, the manufacturing cost of the whole soundproofing apparatus can be reduced.

  As described above, in this embodiment, by attaching a soundproofing device having the heat insulating cover 32 covering the sleeve 102 that reaches a high temperature and the soundproofing cover 31 covering the entire heat insulating cover 32 and the rod 112 to the rock drill, While preventing the soundproof cover 31 from being damaged, it is possible to prevent the noise generated by the rock drill from propagating to the outside. Since the soundproof cover 31 is formed in a bellows tubular shape with a flexible sheet-like material, it is lightweight and easy to handle. Moreover, since the soundproof cover 31 has a stretching property in the axial direction and expands and contracts according to the progress of work, a stable soundproofing effect can be obtained.

  Further, since the heat insulating cover 32 is configured separately from the soundproof cover 31 and can be removed, only the heat insulating cover 32 can be replaced if the heat insulating cover 32 is deteriorated or damaged, and the entire apparatus can be run. Cost can be kept low. Further, since the heat insulating cover 32 is small and has a simple structure, it can contribute to the reduction of the manufacturing cost and running cost of the apparatus. In addition, since the seam is not exposed to the inside of the cylinder, deterioration of the sewing thread can be suppressed.

  In addition, in a processing device such as a rock drill equipped with the above-described soundproofing device, it is possible to perform processing such as crushing and drilling on rocks or the like while suppressing the generation of noise.

  As described above, in the above embodiment, the rock drill 1 corresponds to the “processing device” of the present invention, and the soundproof cover 31 and the heat insulating cover 32 function as the “soundproof device” of the present invention. . Further, the bit 111 corresponds to the “processed portion” of the present invention, and the sleeve 102 corresponds to the “joining member” of the present invention.

  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 above embodiment is a rock drilling device that transmits the reciprocating or rotating motion of the shank rod 101 provided in the rock drill main body 10 to the bit 111 by the rod 112 and crushes the rock by 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.

  Moreover, in the said embodiment, although the soundproof cover 31 and the heat insulation cover 32 are formed with the same kind of sheet-like material, about the heat insulation cover 32 which is not limited to this, internal heat may not be transmitted outside. While required, the soundproof cover 31 requires a certain degree of heat resistance and high sound insulation, and since the required characteristics are not the same, they may be formed of different materials. For example, the soundproof cover 31 is not required to be as heat resistant as the heat insulating cover 32, so a material with higher sound insulation may be used even if the heat resistance is inferior.

  Moreover, since the flexibility is not necessarily requested | required about the heat insulation cover 32, a glass fiber cloth or the cylinder made from ceramics can be used other than the heat insulation sheet like the said embodiment, for example. In this case, a usable material is required not only to have heat resistance but also to have an action of blocking heat. In this respect, the metal cylinder is not suitable for use alone, and it is desirable to use it in combination with a material having higher heat insulation.

  Further, the bellows tube constituting the soundproof cover is a structure in which a metal wire formed in a spiral shape is attached to the outer surface of a cylindrical sheet, for example, in addition to the structure in which the annular sheets are stacked. Also good.

  As for the soundproof cover 31, a plurality of types of materials may be overlapped, or the soundproof performance may be further enhanced as a double pipe as in the technique described in Patent Document 1.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a processing apparatus that performs processing such as crushing and drilling on processing objects such as the ground, rocks, and concrete structures, and is particularly used in an environment where low noise is required. It is possible to apply suitably.

It is a figure which shows the external appearance of the rock drill provided with the soundproofing apparatus concerning this invention. It is sectional drawing which shows the structure of the soundproofing device concerning this invention. It is an exploded view which shows the structure of the soundproof cover for rods. It is an exploded view which shows the detailed structure of the soundproof cover for rods. It is a fragmentary sectional view which shows the detailed structure of the soundproof cover for rods. It is a figure which shows the cross-section of a heat insulation cover. It is a figure which shows the shape change of the soundproof cover accompanying progress of drilling work.

Explanation of symbols

1 ... Rock drill (processing equipment)
DESCRIPTION OF SYMBOLS 10 ... Drifter 20 ... Main body cover 31 ... Soundproof cover 32 ... Thermal insulation cover 40 ... Soundproof cover for bits 41 ... Sound insulation sheet 43 ... Thermal insulation sheet 102 ... Sleeve (joining member)
111 ... bit (processing part)
112 ... Rod 121 ... Arm

Claims (7)

Mounted on a processing apparatus having a rod having a processing part for processing the ground or rock at one end, a drifter for driving the rod, and a coupling member for mechanically connecting the drifter and the other end of the rod In soundproofing equipment,
A heat insulating cover that is formed in a cylindrical shape and has an inner surface that has heat insulating properties, covers the coupling member, and exposes the rod;
A soundproofing device comprising: a sheet-like material having flexibility, sewn in a cylindrical shape, and a soundproofing cover that covers the heat insulating cover and the rod.   The soundproofing device according to claim 1, wherein a space between the soundproofing cover and the heat insulating cover is detachable.   The soundproof device according to claim 1 or 2, wherein the soundproof cover is a bellows tube that can be expanded and contracted in a longitudinal direction of the rod.   The soundproofing device according to claim 3, wherein the bellows tube is formed by stitching a plurality of sheet-like materials cut into an annular shape.   The heat insulating cover has a heat insulating sheet having at least one surface having heat insulating properties and is cut into a substantially rectangular shape, and both ends thereof are overlapped with each other so that the surface having heat insulating properties is the inner surface of the cylinder, and stitched at the joint. The soundproofing device according to any one of claims 1 to 4, having a structure.   The soundproofing device according to claim 5, wherein both ends of the heat insulating sheet are overlapped with each other so that surfaces connected to an inner surface of the cylinder face each other. A rod having a processing part for processing ground and rocks at one end;
A drifter body for driving the rod;
A coupling member that mechanically couples the drifter body and the other end of the rod;
A heat insulating cover that is formed in a cylindrical shape and has an inner surface that has heat insulating properties, covers the coupling member, and exposes the rod;
A processing apparatus comprising a sheet-like material having flexibility, which is formed by sewing into a cylindrical shape, and comprising a soundproof cover that covers the heat insulating cover and the rod.

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