JP6051582B2 - Dust collector - Google Patents

Description

  The present invention relates to a dust collector that is used by being connected to a drill tool or the like, and more particularly to a dust collector that can prevent clogging of a filter.

  Conventionally, dust collection using a dust collector has been performed when drilling with a concrete drill tool. In such a dust collector, a negative pressure is generated by rotating a fan with a motor or the like, and dust collection is performed using this negative pressure. At this time, a filter is generally provided around the negative pressure generating means such as a motor, and dust is captured by the filter to separate the air passing through the filter from the dust.

  Dust easily adheres to such a filter, but if the dust remains attached, clogging occurs and the suction force decreases. In order to solve such a problem, for example, Patent Document 1 discloses a configuration in which a bowl-shaped filter cage made of a rigid steel wire and a spring steel plate is provided inside the filter. According to the configuration described in Patent Document 1, the filter cage is deformed during operation of the dust collector, and the filter filter cloth is maintained in a state of being recessed inward. However, when the operation of the dust collector is stopped, the negative pressure inside the filter device disappears, so the spring steel plate of the filter cage is forcibly returned by the spring force in the direction to inflate the filter filter cloth, and the surface of the filter filter cloth is Since it is deformed along with the deformation, dust accumulated on the surface can be removed.

JP 2002-45318 A

  However, in the configuration described in Patent Document 1 described above, the amount of deformation of the filter cage is small, and the contact portion with the filter becomes local, so that the spring force of the filter cage is not evenly transmitted to the filter when operation is stopped. there were. If the spring force of the filter cage is not transmitted evenly to the filter, the deformation of the filter becomes local, and the dust is unevenly removed, so that the original suction force cannot be exhibited and the working efficiency is lowered.

  Therefore, an object of the present invention is to provide a dust collector that can efficiently remove dust and the like adhering to a filter when operation is stopped, and can prevent a reduction in suction force due to clogging of the filter.

  The present invention has been made to solve the above-described problems, and is characterized by the following.

(Claim 1)
The invention described in claim 1 is characterized by the following points.

That is, the dust collector according to claim 1 is a dust collector including a dust collection box for storing dust sucked from the suction port, and generates a suction force to suck dust from the suction port. A negative pressure generating means for generating a negative pressure in the dust collection box; a cylindrical secondary filter provided on the suction side of the negative pressure generating means; a primary filter covering the outside of the secondary filter; and the primary Tension applying means for applying tension to the filter, and the tension applying means is composed of a weight member attached to the bottom of the primary filter, and resists deformation of the filter due to the operation of the negative pressure generating means. applying tension to the direction, the weight member, said Ri ring der formed on the large diameter and shorter than the secondary filter, the weight member, the front by the negative pressure generating means When a negative pressure inside the dust collection box has occurred, and being movable upward to a position facing the outer periphery of said secondary filter.

(Claim 1)
The invention according to claim 1 is as described above, and includes tension applying means for applying tension to the filter. Therefore, when the negative pressure generating means stops operation and the negative pressure is eliminated, the filter is deformed by the negative pressure. Since the restored filter is restored to its original shape, dust and the like adhering to the filter can be efficiently removed, and a reduction in suction force due to clogging of the filter can be prevented.

  In addition, since a predetermined tension is always applied to the filter, the tension is not a magnitude corresponding to the amount of deformation of the filter. When the negative pressure generating means stops operation and the negative pressure is eliminated, the tension is negative. The filter deformed by the pressure can be reliably restored to the original shape.

  In addition, since it is composed of a weight member attached to the filter, the filter is easily deformed greatly, and when the negative pressure generating means stops its operation and the negative pressure is eliminated, the entire filter is surely restored to its original shape. Can be restored.

It is a side view of the dust collector concerning a 1st embodiment. It is an exploded view of the dust collector concerning a 1st embodiment. It is sectional drawing of the dust collector which concerns on 1st Embodiment. It is sectional drawing of the dust collector which concerns on 1st Embodiment, Comprising: (a) The figure which shows the state in which the dust collector is driving | operating, (b) The figure which shows the state at the time of the operation stop of a dust collector. It is a figure which concerns on the modification of 1st Embodiment, Comprising: (a) Sectional drawing of the dust collector which concerns on the modification 1 of 1st Embodiment, (b) The dust collector which concerns on the modification 2 of 1st Embodiment It is sectional drawing. It is sectional drawing of the dust collector which concerns on 2nd Embodiment. It is sectional drawing of the dust collector which concerns on 2nd Embodiment, Comprising: (a) The figure which shows the state in which the dust collector is driving | operating, (b) The figure which shows the state at the time of the operation stop of a dust collector. It is a figure which concerns on 3rd Embodiment, Comprising: (a) It is sectional drawing of a dust collector, (b) It is AA sectional drawing. It is a perspective view of the cage member concerning a 3rd embodiment. It is sectional drawing of the dust collector which concerns on 3rd Embodiment, Comprising: (a) The figure which shows the state during operation of a dust collector, (b) BB sectional drawing, (c) The figure which shows the state at the time of the operation stop of a dust collector (D) It is CC sectional drawing.

(First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.

  The dust collector 10 according to this embodiment is used by being connected to a drill tool or the like, for example. As shown in FIG. 1, a control unit 14 incorporating a control device for controlling the operation of the dust collector 10 is provided at the upper portion of the dust collector 10. The control unit 14 is provided with an operation panel on which a power switch, an operation switch (not shown), and the like are arranged.

  Below the control unit 14, a motor 12 and a fan 13 are provided as negative pressure generating means. The motor 12 and the fan 13 start to operate by operating the operation switch of the control unit 14. Specifically, when the operation of the dust collector 10 is started by operating the operation switch of the control unit 14, the motor 12 starts to rotate, and the fan 13 connected to the rotation shaft of the motor 12 rotates. When the fan 13 rotates, a negative pressure is generated in a dust collection box 23, which will be described later, thereby generating a suction force.

  Further, as shown in FIG. 1, a dust collection box 23 for storing the sucked dust is provided under the control unit. A dust collection hose attachment port 24 for attaching a dust collection hose 25 is provided on the side of the dust collection box 23, and the dust collection hose attachment port 24 is operated by operating the motor 12 and the fan 13 described above. Inhalation is started from the dust collecting hose 25 attached to the.

  In the dust collection box 23, as shown in FIGS. 2 and 3, a secondary filter 22 disposed on the suction side of the fan 13, a primary filter 21 covering the outer side of the secondary filter 22, and the primary filter 21 A weight member 31 is provided as tension applying means for applying tension. In the present embodiment, the weight member 31 is disposed at the bottom of the primary filter 21.

  The primary filter 21 is a bucket-shaped bottomed bag body made of synthetic fiber or the like, and the motor 12 provided at the lower part of the control unit 14 by hooking the periphery of the upper opening to the lower surface of the control unit 14 and The lower part of the fan 13 is covered.

  The secondary filter 22 is a cylindrical pleated filter formed by weaving synthetic fiber or the like, and the upper opening is fixed to the lower surface of the control unit 14, so that the motor 12 provided at the lower part of the control unit 14. And the lower part of the fan 13 is covered.

  The diameter of the primary filter 21 is larger than the diameter of the secondary filter 22. When the primary filter 21 and the secondary filter 22 are attached to the lower part of the control unit 14, the primary filter 21 completely removes the secondary filter 22. It is formed to cover.

  The weight member 31 is a member for applying tension to the primary filter 21 by acting on the opposite side with respect to the suction side of the motor 12, and is, for example, a member obtained by molding metal in a ring shape. The material of the weight member 31 is not limited to metal, and may be any material having a certain weight. For example, resin or stone may be used.

  The weight member 31 is disposed at the bottom of the primary filter 21 as shown in FIG. At this time, since the outer diameter of the weight member 31 is substantially equal to the inner diameter of the bottom portion of the primary filter 21, the weight member 31 pushes down the vicinity of the outer peripheral edge of the bottom portion of the primary filter 21. Giving tension.

  When the dust collector 10 according to the present embodiment is operated, as shown in FIG. 4 (a), negative pressure is generated in the dust collection box 23 by the negative pressure generating means 11, and the dust collector hose attachment port 24 is attached. Suction from the dust collecting hose 25) is started. At this time, the primary filter 21 is deformed in the contraction direction by the negative pressure. Further, most of the dust collected by suction is separated by the primary filter 21, but a part of the dust etc. is attached to the primary filter 21 by the negative pressure.

  On the other hand, when the dust collector 10 is stopped, as shown in FIG. 4B, the negative pressure generating means 11 is stopped, and the pressure inside the dust collection box 23 becomes equal to the atmospheric pressure, so that suction is stopped. Then, since the primary filter 21 is pushed down by the weight member 31, the primary filter 21 is uniformly deformed in all directions in which the primary filter 21 swells and is restored to its original shape. As a result, dust and the like adhering to the primary filter 21 can be automatically removed and dropped into the dust collection box 23.

  Thus, according to the present embodiment, the weight member 31 applies tension to the primary filter 21 by pushing down the primary filter 21 downward. Therefore, when the negative pressure is eliminated when the operation is stopped, the primary filter is caused by the tension. It is possible to efficiently remove dust and the like adhering to 21, and to prevent a reduction in suction force due to clogging of the primary filter 21.

  In addition, when the weight member 31 is used for the tension applying unit as in the present embodiment, generally, a larger negative pressure of the negative pressure generating unit 11 is required than when the spring is used for the tension applying unit. Instead, a large deformation of the primary filter 21 and a reliable restoring force can be obtained. That is, when the spring is used as the tension applying means, the tension (restoring force) of the tension applying means becomes larger as the deformation of the primary filter 21 is increased. When the tension of the tension applying unit is increased, the negative pressure of the negative pressure generating unit 11 needs to be increased in proportion to the tension. In order to obtain a large deformation of the filter, the tension of the tension applying unit and the generation of the negative pressure are increased. The large negative pressure balance of the means 11 is also required. On the other hand, if the tension is constant by the weight member 31 as in the present embodiment, a large negative pressure of the negative pressure generating means 11 is not necessary, and a large deformation of the primary filter 21 and a reliable restoring force can be obtained.

  In the present embodiment, the primary filter 21 itself is not integrally formed with tension applying means such as a spring by utilizing the characteristic of expanding uniformly in all directions of the primary filter 21 formed of synthetic fiber or the like. When maintenance such as replacement or cleaning of the primary filter 21 is performed, the primary filter 21 and the weight member 31 are separately removed from the dust collection box 23, and only the primary filter 21 can be easily maintained.

  In the above-described embodiment, the ring-shaped weight member 31 is used. However, the present invention is not limited to this. For example, a mass member 31 shown in FIG. 5A may be used. In this case, the weight member 31 may be disposed near the center of the bottom of the primary filter 21.

  In the above-described embodiment, the weight member 31 is disposed at the bottom of the primary filter 21. However, the present invention is not limited to this, and the weight member 31 is disposed on the side of the primary filter 21 as shown in FIG. You may arrange.

  Further, the weight member 31 is not limited to the inside of the primary filter 21, and for example, a housing portion may be provided in the primary filter 21 and disposed outside the primary filter 21.

(Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS. The characteristic point of this embodiment is that a spring member 32 is provided instead of the weight member 31 of the first embodiment as a tension applying means. Since other basic configurations are not different from those of the first embodiment, description thereof is omitted.

  The spring member 32 according to this embodiment is a member for applying tension to the primary filter 21 by acting (biasing) on the opposite side to the suction side of the motor 12, and as shown in FIG. Is supported by the lower end of the control unit 14, and the lower end of the control unit 14 is disposed in a state of being stretched to the bottom of the primary filter 21. At this time, since the outer diameter of the spring member 32 is substantially equal to the inner diameter of the bottom of the primary filter 21, the spring member 32 biases the vicinity of the outer peripheral edge of the bottom of the primary filter 21 downward, thereby 21 is tensioned.

  When the dust collector 10 according to the present embodiment is operated, as shown in FIG. 7A, a negative pressure is generated in the dust collection box 23 by the negative pressure generating means 11, and the side surface of the primary filter 21 is reduced in diameter by the negative pressure. Deform in the direction. Then, when the dust collector 10 is stopped, the primary filter 21 is pushed downward by the spring member 32 as shown in FIG. 7B, so that the primary filter 21 is uniformly deformed in the omnidirectional direction. Restore the original shape. As a result, dust and the like adhering to the primary filter 21 can be automatically removed and dropped into the dust collection box 23.

  As described above, according to the present embodiment, the spring member 32 applies tension to the primary filter 21 by pushing down the primary filter 21 downward. Therefore, when the negative pressure is eliminated when the operation is stopped, the primary filter is caused by the tension. It is possible to efficiently remove dust and the like adhering to 21, and to prevent a reduction in suction force due to clogging of the primary filter 21.

  Also in the case of this embodiment, since the primary filter 21 and the spring member 32 are separated, when the primary filter maintenance is performed, the primary filter 21 and the spring member 32 are separated from the dust collection box 23 separately. Only the primary filter 21 can be easily removed and maintained.

Further, in the present embodiment, the configuration of the dust collector 10 as a whole is an arrangement in which the control unit 14 is at the top and the dust box 23 is at the bottom. It suffices if it is opposite to the suction side of the generating means 11, that is, on the bottom side of the primary filter 21. For example, a configuration in which the control unit 14 is at the bottom and the dust collection box 23 is disposed at the top, or a configuration in which the control unit 14 and the dust collection box 23 are disposed horizontally may be employed. (Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS. The feature of this embodiment is that a cage member 33 is provided instead of the weight member 31 of the first embodiment as a tension applying means. Since other basic configurations are not different from those of the first embodiment, description thereof is omitted.

  The cage member 33 according to the present embodiment is a member for applying tension to the primary filter 21, and as shown in FIG. 8 and FIG. 9, a rigid steel wire is assembled in a mesh shape to form a cylindrical shape. It can be elastically deformed in the reduced diameter direction. The cage member 33 is disposed inside the primary filter 21. In the natural state, the outer diameter of the cage member 33 is formed to be at least larger than the inner diameter of the bottom of the primary filter 21, so that the primary filter 21 deformed inward can be evenly biased in the radial direction inflating. Yes.

  When the dust collector 10 according to the present embodiment is operated, as shown in FIG. 10A, a negative pressure is generated in the dust collection box 23 by the negative pressure generating means 11, and the primary filter 21 is reduced in diameter by the negative pressure. Deform. At this time, the cage member 33 is deformed in the reduced diameter direction. When the dust collector 10 is stopped, as shown in FIG. 10B, the cage member 33 is deformed in the expanding direction by the spring force, so that the primary filter 21 is uniformly deformed in the radial direction in which the primary filter 21 swells. Restore the shape. As a result, dust and the like adhering to the primary filter 21 can be automatically removed and dropped into the dust collection box 23.

  As described above, according to the present embodiment, the cage member 33 can be deformed in the diameter-reducing direction in accordance with the deformation of the primary filter 21, so that the amount of deformation is large, and the effect of removing dust and the like adhering to the primary filter 21 is also achieved. large. Therefore, dust or the like adhering to the primary filter 21 can be efficiently removed when the negative pressure is eliminated when the operation is stopped, and a reduction in suction force due to clogging of the primary filter 21 can be prevented.

  In the present embodiment, the cage member 33 is disposed inside the primary filter 21. However, the present invention is not limited thereto, and the cage member 33 may be disposed outside the primary filter 21. What is necessary is just to sew on the outer side of the primary filter 21, for example as a method of arrange | positioning outside.

  In the present embodiment, the cage member 33 is cylindrical. However, the present invention is not limited to this, and the cage member 33 may be formed in a conical shape.

DESCRIPTION OF SYMBOLS 10 Dust collector 11 Negative pressure production | generation means 12 Motor 13 Fan 14 Control part 21 Primary filter 22 Secondary filter 23 Dust collection box 24 Dust collection hose attachment port 25 Dust collection hose 31 Weight member (Tension provision means)
32 Spring member (tensioning means)
33 Cage member (tensioning means)

Claims (1)

A dust collector equipped with a dust collection box for storing dust sucked from a suction port,
A negative pressure generating means for generating a negative pressure in the dust collection box by generating a suction force in order to suck dust from the suction port;
A cylindrical secondary filter provided on the suction side of the negative pressure generating means;
A primary filter covering the outside of the secondary filter;
Tension applying means for applying tension to the primary filter;
With
The tension applying means is composed of a weight member attached to the bottom of the primary filter, and applies tension in a direction against the deformation of the filter by the operation of the negative pressure generating means,
Said weight member, Ri ring der formed on the large diameter and shorter than the secondary filter,
The dust collector is capable of moving upward to a position facing the outer periphery of the secondary filter when a negative pressure is generated inside the dust collection box by the negative pressure generating means .

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