JP4299222B2 - Polishing dust collector - Google Patents

Description

  The present invention performs, for example, buffing of jewelry, precious metals, etc., or polishing and grinding various materials, products, tools, etc., and collects or removes dust generated by these operations. The present invention relates to a polishing dust collector to be recovered. In more detail, the present invention constitutes a gas circulation cycle for dust collection between the polishing device and the dust collector in such a polishing dust collector, and further, a gas circulation cycle is provided on the rotational drive shaft of the polishing jig. The present invention relates to a polishing dust collector provided with a reinforcing function.

  When various materials and products including jewelry, precious metals, etc., or tools are polished or ground, fine dust is generated and scattered in the air. Such dust can contaminate the work environment and make it uncomfortable, and can be inhaled into the nasal cavity and lungs of workers who perform grinding or grinding, etc. May cause visual impairment. Further, when an object (workpiece) to be polished or ground is an expensive and special material, the generated dust may be collected and reused for cost reasons.

  For these reasons, there is provided a polishing dust collector that not only performs polishing and grinding of a workpiece, but also collects and removes or collects dust generated in these operations without scattering in the air. ing.

  For example, as shown in FIG. 1, a conventional general polishing dust collector includes a polishing device 3 provided with a polishing jig 2 such as a polishing disk rotated by a motor 1, and at least polishing treatment in the polishing device 3. The cover housing 4 encloses the peripheral portion of the tool 2 and an intake-type dust collector 6 communicated with the cover housing 4 through a dust collecting air passage 5.

  In the cover housing 4, the work 7 to be polished is usually moved into a contact position with the polishing jig 2, or the work 7 is inserted into the contact position with the polishing jig 2 and held by the operator's hand. An opening window 8 is formed so as to be able to.

  In FIG. 1 and each drawing showing the embodiment of the present application, the case where the opening window 8 is formed on the upper portion of the cover housing 4 is shown for convenience of illustration. In this case, the work 7 is brought into contact with the polishing jig 2 from above. However, in practice, the opening window 8 is often formed on the side of the cover housing 4 (the front side or the depth side of the polishing jig 2 in FIG. 1). In this case, since the workpiece 7 is in contact with the polishing jig 2 from the side, operations such as polishing and grinding are easier. In addition, a commercially available vacuum cleaner may be borrowed as the dust collector 6 (or further, the dust collecting vent 5).

  In the polishing dust collecting apparatus of FIG. 1 configured as described above, various workpieces 7 are brought into contact with the polishing jig 2 to perform buffing / polishing / grinding and the like, and the generated dust is discharged from the dust collecting air passage 5. The air is sucked into the dust collecting device 6 and collected by an appropriate dust collecting filter built in the dust collecting device 6.

JP-A-2002-191920 Next, in the above-mentioned Patent Document 1, a suction duct is commonly connected to each hood of a plurality of polishing boards arranged in a work chamber via a shutter, and a noble metal extraction opening is provided in the suction duct. Disclosed is a dust collector in which a dust collector is connected to the other end opening of the suction duct in a dust collector compartment partitioned from the work chamber, and the air from the dust collector is passed through an air cleaner having a filter and a deodorizing and removing means. .

  By the way, the filter for dust collection provided in the polishing dust collector exhibits a large suction resistance against the intake action of the dust collector. Therefore, in the polishing dust collector having a general configuration as shown in FIG. 1, the suction force of the dust collector for the generated dust tends to be insufficient. If the dust collector's suction force is insufficient, part of the dust may be scattered outside the cover housing, and it may accumulate inside the cover housing, making it difficult to see the inside of the cover housing or malfunctioning of the polishing dust collector. There is a problem that it causes.

  The usual countermeasures that can be considered for such problems are dust collectors that have extremely strong suction force that overcomes the suction resistance of dust collection filters (ie, dust collectors that are expensive, large, and expensive to operate). Device).

  For example, in the dust collector according to Patent Document 1 described above, the rotational speed of the dust collector blower is controlled based on the detection data of the pressure sensor to adjust the pressure in the suction duct. Therefore, it is assumed that a high-performance (expensive) blower that can exhibit an extremely strong suction force when necessary is used as the dust collector blower. In this dust collector, “a part of the clean air from the air cleaner is returned to the working chamber”, but it is needless to say that this does not directly return the clean air to each hood of the plural polishing machines. .

  Therefore, the present invention should solve the problem of providing a polishing dust collector capable of obtaining a sufficient dust collecting force with a simple and low-cost configuration without using an expensive dust collector having a strong suction force. Let it be an issue. The inventor of the present application has come up with the following three technical points in the process of pursuing means capable of solving this problem.

  First, in the conventional polishing dust collector, the purified air after passing through the dust filter is simply discharged to the outside or simply returned to the polishing work chamber, and the exhaust pressure of the purified air from the dust collector Is not used at all for dust collection, or is not fully used.

  Secondly, the polishing drive rotary drive shaft has a large excess torque (surplus rotational force) even during the work of grinding or grinding the workpiece with the polishing jig, but in the conventional polishing dust collector, the rotary drive shaft The torque is provided only for the purpose of polishing and grinding the workpiece, and the above large surplus torque is not used at all for dust collection or is not fully used.

  Thirdly, in the conventional polishing dust collector, the cover housing is configured only for the purpose of preventing dust from being scattered, so it is considered to be sufficient if it simply surrounds the periphery of the polishing jig. Therefore, the shape of the cover housing and the configuration of the connecting portion between the cover housing and the dust collecting air passage are not sufficiently considered from the viewpoint of effective dust collection. When considering using the exhaust pressure of the purified air from the dust collector and / or the excessive torque of the rotary drive shaft for dust collection, the shape of the cover housing, the setting part of the air passage with respect to the cover housing, and the opening direction are large. Although it has a technical meaning, this point has not been considered in the past.

(Configuration of the first invention)
The structure of the first invention of the present application for solving the above-described problem is that a polishing apparatus provided with a polishing jig that is rotationally driven by a motor, and at least a periphery of the polishing jig of the polishing apparatus and a polishing work entering or A cover housing having a shape allowing insertion and holding; an intake-type dust collector connected to the cover housing via a dust collecting vent; and a purified gas discharge portion of the dust collector connected to the cover housing. A polishing dust collecting apparatus comprising a gas circulation cycle including the cover housing, the dust collecting ventilation path, the dust collecting apparatus, and the reflux ventilation path.

(Configuration of the second invention)
The configuration of the second invention of the present application for solving the above-described problem is that a polishing jig is sandwiched between the opening of the dust collecting vent and the return vent of the cover housing according to the first invention. A polishing dust collecting device provided at the opposite side of.

(Configuration of the third invention)
The configuration of the third invention of the present application for solving the above-described problem is that the cover housing according to the first invention or the second invention is a circular hollow body surrounding the periphery of the polishing jig with a necessary notch portion. It is a polishing dust collector.

(Configuration of the fourth invention)
The structure of the fourth invention of the present application for solving the above-described problem is that a rotary blower member surrounded by the cover housing is provided on the rotary drive shaft of the polishing jig according to any one of the first to third inventions. It is an attached abrasive dust collector.

(Structure of the fifth invention)
The configuration of the fifth invention of the present application for solving the above problem is a polishing dust collector in which the rotary air blowing member according to the fourth invention is of a vortex type.

  Here, the “vortex-type air blowing member” means that a large number of spiral blades are derived on the surface of the air blower as seen in, for example, a liquid volute pump, and the fluid on the air blower is circulated as a whole. It refers to a blowing member that is sent in the centrifugal direction (circumferential direction of the blower).

(Structure of the sixth invention)
According to the sixth aspect of the present invention for solving the above problem, the opening direction of the dust collecting vent and the reflux vent to the cover housing according to the fifth invention is along the tangential direction of the vortex flow. A polishing dust collector.

(Structure of the seventh invention)
According to the seventh aspect of the present invention for solving the above problem, the rotary air blowing member according to the fourth aspect of the present invention is an axial flow type, and the reflux passage is an upstream portion of the cover housing with respect to the axial flow direction. In addition, the dust collecting vent is opened at each downstream portion of the cover housing with respect to the axial direction in the cover housing.

  Here, the “axial flow type air blowing member” refers to the diameter of a propeller blade having a plurality of twists from a central hub member that is a rotating shaft, as seen in, for example, a normal fan or a propeller of a propeller type airplane. A blowing member of a type that protrudes in the direction and feeds fluid in the direction of the rotation axis during rotation.

(Configuration of the eighth invention)
The structure of the eighth invention of the present application for solving the above-mentioned problems is that the polishing jigs are provided at both ends of the rotational drive shaft of the motor according to any one of the first to seventh inventions, and these polishing jigs are provided. A dust collecting apparatus in which the dust collecting air passage and the reflux air passage are communicated with a cover housing provided in the housing.

(Structure of the ninth invention)
The structure of the ninth invention of the present application for solving the above-mentioned problem is such that the rotationally driven polishing jig according to any one of the first to eighth inventions is selected from the following (1) to (6). A polishing dust collector.
(1) Buffing jig.
(2) Grinder (3) Circular saw (4) Rotary cutter (5) Rotary canna

(Effect of the first invention)
In the first invention, dust generated by polishing or grinding of the workpiece is collected without being scattered in the air by the cover housing, the dust collecting vent and the dust collecting device, and then removed or collected. . Therefore, there is no fear that the working environment is contaminated by dust, or the worker's health is harmed by scattered dust.

  In the first aspect of the invention, the purified gas discharge part of the dust collector is connected to the cover housing by a reflux passage. That is, a gas circulation cycle is constituted by the cover housing, the dust collecting vent, the dust collecting device, and the reflux vent. Therefore, since the discharge pressure of the purified air from the dust collector is effectively used for dust collection in the next cycle, it is said that a gas circulation cycle is formed without using an expensive dust collector having a strong suction force. A sufficiently strong dust collecting force can be obtained by a simple and low-cost configuration.

(Effect of the second invention)
In the second invention, since the opening of the dust collecting air passage and the opening of the recirculating air passage are provided on the opposite sides of the polishing jig, the air flows into the cover housing from the recirculating air passage. The purified air and the dust collection air discharged from the cover housing to the dust collection vent are smoothly exchanged, and the circulation efficiency of the gas circulation cycle is good. Accordingly, the dust collecting power is further enhanced.

(Effect of the third invention)
The dust generated by the contact between the polishing jig that is driven to rotate and the work is originally scattered in the tangential direction of the rotation of the polishing jig. For this reason, when the cover housing is a circular hollow body surrounding the periphery of the polishing jig, the scattered dust smoothly moves around the inside of the cover housing and is sucked into the dust collecting air passage. That is, it is difficult for dust to accumulate inside the cover housing. Further, it is difficult to cause a malfunction of the dust collector due to dust accumulation, and there is little trouble of frequently cleaning the accumulated dust.

(Effect of the fourth invention)
In the fourth aspect of the invention, since the rotary blower member is attached to the rotary drive shaft of the polishing jig, the blower member generates wind due to the rotation of the rotary drive shaft during the polishing or grinding operation. Strongly reinforces the gas circulation cycle of the dust device.

  That is, the surplus torque of the rotational drive shaft for rotationally driving the polishing jig is effectively used for dust collection. As a result, even if an expensive dust collecting device having a strong suction force is not used, a more sufficient dust collecting force can be obtained by a simple and low-cost configuration called a blowing member attached to the rotary drive shaft.

(Effect of the fifth invention)
In the fifth aspect of the invention, the rotary air blowing member is a vortex type and causes a wind toward the centrifugal direction while circling, so that the dust circulates inside the cover housing and is difficult to accumulate in a specific portion. When the cover housing is formed as a circular hollow body surrounding the periphery of the polishing jig as in the third aspect of the invention, a particularly remarkable synergistic effect is exhibited.

(Effect of the sixth invention)
When the rotary air blowing member is a vortex type and the opening direction of the dust collecting air passage and the reflux air passage with respect to the cover housing is along the tangential direction of the vortex flow, these air passages are the cover housing. Therefore, it is extremely reasonable in terms of smooth circulation of dust inside the cover housing and circulation efficiency of the gas circulation cycle.

  Accordingly, dust collection is particularly small in the interior of the cover housing, and a particularly strong dust collecting force can be obtained without using an expensive dust collecting device having a strong suction force.

(Effect of the seventh invention)
In the seventh aspect of the invention, along the air flow direction of the axial flow type air blowing member, an opening portion of the reflux passage is provided on the upstream side, and an opening portion of the dust collecting air passage is provided on the downstream side. Therefore, the gas circulation direction in the entire gas circulation cycle coincides with the air movement direction in the cover housing. Therefore, a strong dust collecting force can be obtained without using an expensive dust collecting device having a small suction amount and a strong suction force.

(Effect of the eighth invention)
In the polishing dust collector, as in the eighth invention, the polishing jig and the cover housing can be provided at both ends of the rotational drive shaft of the motor for driving and rotating the polishing jig. With such a configuration, two polishing dust collectors can be operated by a single motor, so the cost of the apparatus is high, and different types of polishing jigs (for example, buffing machines and grinders) can be used. Since it can be installed simultaneously, the versatility of the device is high.

(Effect of the ninth invention)
The type of polishing jig provided in the polishing dust collector is not limited. For example, the polishing dust collector is equipped with one or two kinds of polishing jigs arbitrarily selected from (1) to (6) of the ninth invention. Can be made.

  Next, the first to ninth embodiments of the present invention will be described including the best mode. In the following, the term “present invention” simply refers to each of the above-mentioned inventions collectively.

[Polishing dust collector]
A polishing dust collecting apparatus according to the present invention includes a polishing apparatus provided with a polishing jig that is rotationally driven by a motor, and a shape that surrounds at least the periphery of the polishing jig and permits the work for polishing to be inserted or held in place. Cover housing, a dust collecting air passage having one end opened in a part of the cover housing, an intake type dust collecting device in which the other end of the dust collecting air passage is communicated, and one end of the dust collecting device And a recirculation vent passage having the other end opened to a part of the cover housing.

  The dust collector has a built-in dust collecting filter in an appropriate form. Further, the configuration of the intake actuator (power device for generating intake force) in the dust collector is not limited, and can be arbitrarily designed. On the electrical circuit, the motor of the polishing apparatus and the intake actuator of the dust collector may be turned on / off at the same time, and each ON / OFF switch may be provided independently.

  As long as the configuration of the present invention is adapted, a commercially available vacuum cleaner can be incorporated as a dust collector for convenience. In that case, since the suction hose of the vacuum cleaner serves as a dust collecting ventilation path, the suction section of the suction hose is connected to the cover housing, and the exhaust section of the vacuum cleaner is appropriately configured as a reflux ventilation path. It is necessary to contact as closely as possible.

  Preferably, a rotary blower member surrounded by a cover housing is attached to the rotational drive shaft of the polishing jig. The air blowing member may be a vortex type or an axial type as described later, but the former is more preferable.

  In the polishing dust collector of the present invention configured as described above, when the intake dust collector operates, the air in the cover housing is sucked into the dust collector through the dust collecting vent and is collected. A gas circulation cycle is formed in which the gas passes through the filter and is discharged from the purified gas discharge portion of the dust collector and then returned to the cover housing through the reflux passage. When the air blowing member is attached to the rotational drive shaft of the polishing jig, the air blowing force of such a gas circulation cycle is significantly reinforced.

[Polishing device and polishing jig]
As long as the polishing apparatus and the polishing jig are used for polishing, grinding, cutting, etc. of various materials and products including jewelry, precious metals, etc., or for various tools, etc. There is no limitation on the type or configuration. As a preferable example thereof, as shown in the ninth invention, a polishing apparatus provided with a buffing jig, a grinder, a circular saw, a rotary cutter, a rotary cannula or the like as a polishing jig may be exemplified. it can.

  In the polishing apparatus, there are one in which one polishing jig is attached to one end of the rotational drive shaft of the motor and one in which one or the same kind or different kind of polishing jig is attached to both ends of the rotational drive shaft of the motor. included. In the latter case, the cover housing preferably surrounds the polishing jigs at both ends of the rotary drive shaft individually or collectively.

[Cover housing]
The cover housing is configured to surround at least the periphery of the polishing jig, but may be configured to surround the entire polishing apparatus including the polishing jig. In general, the former configuration is preferable, but the latter configuration may be preferable when one polishing jig is attached to each end of the rotational drive shaft of the motor. Although the shape of such a cover housing is not limited, it is particularly preferable that the cover housing is a circular hollow body that surrounds the peripheral portion of the rotating polishing jig with some margin.

  The cover housing is provided with a notch portion necessary for the configuration of the apparatus. As an example of such a notch portion, a space provided for inserting the rotational drive shaft of the polishing jig can be mentioned. As another example of the notch, in order to allow a workpiece to be used for polishing, grinding, cutting, etc. to enter and further pass through the polishing jig, or to allow the operator to hold the workpiece at the entry position with fingers In addition, a space provided in an appropriate part of the cover housing can be mentioned.

  Although the constituent material of the cover housing is not limited, the cover housing is preferably made of a transparent material such as glass or plastic that can see through operations such as polishing, grinding, and cutting from the outside.

[Ventilation path]
In the present invention, a dust collecting vent and a reflux vent are configured. The dust collecting air passage is a pipe or duct connecting the cover housing and the dust collecting device (the suction port side), and the reflux air passage is connecting the purified gas discharge part of the dust collecting device and the cover housing. A pipe or duct.

  Therefore, the cover housing is provided with an opening for communicating with the dust collecting vent and the reflux vent. About the installation site | part of these opening parts, generally it is preferable to provide in the site | part on the opposite side on both sides of a grinding | polishing jig | tool. When the cover housing is configured as a circular hollow body that surrounds the polishing jig as described above, the opening of the dust collecting ventilation path and the opening of the reflux ventilation path are formed of a circular circular body. It is preferable to provide at the opposing position in the circumference. Further, particularly preferred embodiments of these openings in the case where a vortex type or axial type air blowing member is provided on the rotational drive shaft of the polishing jig will be described later.

[Blowing member]
In the present invention, the “air blowing member” refers to a member that is attached to a rotational drive shaft of a polishing jig and that generates air blowing force in a certain direction by its rotation. The blower member includes at least a vortex-type blower member and an axial flow-type blower member as defined in the above-mentioned "Structure of the fifth invention" and "Structure of the seventh invention". A vortex-type air blowing member is particularly preferable.

  Since the blowing member is attached to the rotation drive shaft for the polishing jig that rotates at a very high speed, the blowing force of the gas circulation cycle is greatly reinforced by the strong blowing force. Therefore, when the air blowing force of the air blowing member is too strong compared with the suction force of the dust collector, there is a risk that the dust may be ejected from the cutout portion of the cover housing. Therefore, for example, in the vortex type air blowing member, the setting of the blade height to be derived on the surface of the air blowing board and the number of blades installed, the length and area of the propeller blade in the axial flow type air blowing member, It is preferable to appropriately set the blowing force of the blowing member by appropriately adjusting the design of the blowing member such as adjusting the number of propeller blades.

  When a vortex-type air blowing member is attached to the rotational drive shaft of the polishing jig, it is particularly preferable to configure the cover housing as a circular hollow body surrounding the polishing jig and the air blowing member, and a dust collecting air passage It is particularly preferable to form the opening direction of the reflux passage with respect to the cover housing along the tangential direction of the vortex. “Forming the opening direction along the tangential direction of the vortex flow” means “opening the opening portion along the tangential direction of the vortex flow with the directionality from the upstream side to the downstream side in the circulation direction of the vortex flow”. It is.

  When an axial-flow type air blowing member is attached to the rotary drive shaft of the polishing jig, the reflux air passage is located upstream of the axial direction of the cover housing, and the dust collection air passage is axially flown in the cover housing. It is particularly preferable to open each at a downstream site with respect to the direction. When the cover housing is configured as a circular hollow body that surrounds the polishing jig and the air blowing member, a reflux air passage is opened at a circumferential portion in the upstream portion with respect to the axial flow direction of the cover housing, and the shaft of the cover housing is formed. It is particularly preferable to open a dust collecting vent in the circumferential portion at the downstream portion with respect to the flow direction.

  Embodiments of the present invention will be described below with reference to the drawings. Of course, the technical scope of the present invention is not limited by these examples.

Example 1
The polishing dust collector according to the present embodiment is shown in FIGS. In this polishing dust collecting apparatus, a polishing apparatus 10 provided with a polishing jig 9 such as a polishing disk that is rotationally driven by a rotation drive shaft of a motor 8 and a peripheral portion of the polishing jig 9 except for a necessary notch portion. A cover housing 11 that surrounds the intake housing, an intake-type dust collector 13 that is in communication with the cover housing 11 via a dust collecting air passage 12, and a purified gas discharge portion of the dust collector 13 that is in communication with the cover housing 11. And a ventilation passage 14 for reflux.

  The polishing jig 9 is a buffing jig. Inside the dust collector 13, a filter for collecting dust and an actuator (not shown) for generating suction force are provided. Although the dust collecting air passage 12 and the reflux air passage 14 are shown in a simplified manner by a one-dot chain line, they are actually pipes or ducts, and both ends thereof are respectively the cover housing 11 and the dust collecting device as described above. 13 was contacted.

  The cover housing 11 is made of a transparent plastic, and is formed as a circular hollow body surrounding the periphery of the polishing jig 9 as shown in FIG. 3 which is a left side view of FIG. In the upper part of the cover housing 11, an opening window 16, which is a notch for processing the workpiece 15 (see FIG. 2) in contact with the polishing jig 9, is formed. The open window 16 may be provided in a side portion of the cover housing 11 (side portion of the polishing jig 9) as shown by a two-dot chain line in FIG. Is easy to process. The dust collecting air passage 12 is opened on the lower end side of the cover housing 11, and the reflux air passage 14 is opened on the upper end side of the cover housing 11. That is, the openings are opened on the opposite sides of the polishing jig 9.

  In this embodiment, various works 15 are brought into contact with the polishing jig 9 to perform operations such as buffing, and dust generated inside the cover housing 11 is sucked into the dust collecting device 13 from the dust collecting air passage 12. The dust is collected by a dust collecting filter built in the dust collecting device 13. The air that passes through the filter and is purified (dust removed) and discharged from the dust collector 13 is returned to the cover housing 11 through the reflux passage 14 as it is.

  Therefore, a gas circulation cycle is constituted by the cover housing 11, the dust collecting air passage 12, the dust collecting device 13, and the reflux air passage 14, and the discharge pressure of the purified air from the dust collecting device 13 is set in the gas circulation cycle. Since the wind force is strengthened, a sufficient dust collecting force can be ensured without using an expensive device showing a strong suction force as the dust collecting device 13.

(Example 2)
The polishing dust collector according to the present embodiment is shown in FIGS. This polishing dust collector is different from that of the first embodiment in that the rotary air blowing member 17 is attached to the drive rotation shaft of the polishing jig 9 and the dust collecting air passage 12 with respect to the cover housing 11. The opening form with respect to the reflux passage 14 is different, and the configuration, operation, and effects of other points are the same as those of the first embodiment.

  The air blowing member 17 generates air blowing force in a certain direction by its rotation, and is adjusted in design so that the air blowing force is neither excessive nor insufficient. As the blowing member 17, for example, an axial flow type blowing member 17a shown in FIG. 5A or a vortex type blowing member 17b shown in FIG. 5B can be used.

  The axial-flow type air blowing member 17a is provided with a plurality of propeller blades 19 extending in the radial direction with respect to the central bearing portion 18, and causes the air to blow along the axial direction of the bearing portion 18 by the rotation thereof. The swirl type air blowing member 17b forms a circular air blower 21 integrally with the central bearing portion 20, and forms a spiral pattern on the surface of the air blower 21 as a whole. The rib 22 is derived. The swirl type air blowing member 17b causes air blowing toward the radial direction centering on the bearing portion 20 while rotating.

  When the swirl type air blowing member 17b is provided, as shown in FIG. 5C, the opening direction of the dust collecting air passage 12 and the reflux air passage 14 with respect to the cover housing 11 is determined by the air blowing member 17b. It is preferable to form it along the tangential direction of the eddy current and with a directivity from the upstream side to the downstream side in the circulation direction of the eddy current.

  In the case of providing the vortex type air blowing member 17b, the cover housing 11 configured as a circular hollow body as a whole is further provided with a polishing jig chamber containing the polishing jig 9 and the air blowing member 17b as shown in FIG. The ventilation passage 14 for reflux is connected to one end in the circumferential direction of the blowing member chamber, and the reflux ventilation path 23 is ground from the other circumferential end of the blowing member chamber. You may make it connect with the end of the circumferential direction of a chamber. In this case, the purified air introduced into the blower member chamber from the reflux air passage 14 is blown out in the circumferential direction by the vortex-type blower member 17 b and is blown into the polishing jig chamber vigorously through the reflux blower passage 23. It is.

  In the present embodiment, the blowing force of the gas circulation cycle is greatly reinforced by the blowing force of the blowing member 17, so that even if an expensive device showing a strong suction force is not used as the dust collecting device 13, a more sufficient collection can be achieved. Dust force can be secured.

(Example 3)
In the polishing dust collector according to the present embodiment, the polishing jig is a disk-shaped cutter. The main part is shown in FIG. 7, and a feed base 25 is provided so as to sandwich both front and back sides of a cutter 24 which is a polishing jig of a polishing dust collector. On the feed base 25, the workpiece 9 having a plate shape or the like is fed in the direction of the arrow in the figure while being sequentially cut by the cutter 24 that rotates at high speed.

  A cover housing 26 is provided around the cutter 24 in a circular shape as a whole at a portion that does not contact the feed base 25 and the workpiece 9. Although not shown, a vortex-type air blowing member is attached to the rotary drive shaft of the cutter 24, and the cover housing 26 is configured in the form shown in FIG.

  The opening direction of the dust collecting air passage 27 and the reflux air passage 28 with respect to the cover housing 26 is directed along the tangential direction of the vortex flow by the blower member from the upstream side to the downstream side of the vortex circulation direction. It is formed with directionality. The operations and effects of the present embodiment are not particularly different from those of the second embodiment.

  The present invention provides a polishing dust collector that is inexpensive, has a simple structure, and exhibits a sufficient dust collecting force.

It is a figure which shows a prior art.

1 is a diagram illustrating Example 1. FIG.

It is a figure which shows the left view of Example 1. FIG.

FIG. 6 is a diagram showing Example 2.

FIG. 6 is a diagram showing a main part of Example 2.

FIG. 10 is a diagram illustrating a modification example of a main part of the second embodiment.

FIG. 6 is a diagram showing Example 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 9 Polishing jig | tool 10 Polishing apparatus 11 Cover housing 12 Dust collection ventilation path 13 Dust collection apparatus 14 Recirculation ventilation path 16 Open window 17, 17a, 17b Blower member 23 Reflux ventilation path 24 Cutter

Claims (8)

A polishing and grinding device having a grinding-polishing tool driven in rotation by a motor, a cover having a shape allowing the ingress or insertion retention of polishing and grinding a work with surround at least the grinding-polishing tool periphery of the grinding-polishing apparatus A housing, a rotary blower member surrounded by the cover housing, which is attached to a rotary drive shaft of the polishing / grinding tool, and an air intake type collector connected to the cover housing via a dust collecting air passage A dust passage and a reflux passage for connecting the purified gas discharge portion of the dust collector to the cover housing, and the cover housing, the dust passage, the dust collector, and the reflux passage. A polishing / grinding dust collecting apparatus characterized in that a gas circulation cycle is constituted by a path. The opening of the dust collecting ventilation path and the opening of the reflux ventilation path in the cover housing are provided on opposite sides of the polishing / grinding tool. Polishing and grinding dust collector . The polishing / grinding dust collecting apparatus according to claim 1, wherein the cover housing is a circular hollow body surrounding a peripheral portion of the polishing / grinding tool with a necessary notch portion. . The polishing / grinding dust collecting apparatus according to claim 1, wherein the rotary air blowing member is a vortex type. The polishing / grinding dust collecting apparatus according to claim 4 , wherein an opening direction of the dust collecting ventilation path and the reflux ventilation path with respect to the cover housing is along a tangential direction of the vortex flow. The rotary air blowing member is of an axial flow type, the reflux air passage is an upstream portion of the cover housing with respect to the axial flow direction, and the dust collecting air passage is a downstream portion of the cover housing with respect to the axial flow direction. The polishing / grinding dust collecting apparatus according to any one of claims 1 to 3, wherein the polishing / grinding dust collecting apparatus is opened. The polishing / grinding tool is provided at both ends of the rotational drive shaft of the motor, and the dust collecting ventilation path and the reflux ventilation path are communicated with a cover housing provided in the polishing / grinding tool . The polishing / grinding dust collecting apparatus according to any one of claims 1 to 6 . The polishing / grinding dust collecting apparatus according to any one of claims 1 to 7 , wherein the rotationally driven polishing / grinding tool is selected from the following (1) or (2 ).
(1) Buffing tool (2) Grinder

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