JP2005313288A - Disc sander - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disc sander, provided with a dust collecting cover covering a grinding disc in such a way that a part around a wall can be securely ground without being hindered by the dust collecting cover, and that dust is not discharged at other parts than around the wall. <P>SOLUTION: In this disc sander 30 to drive and rotate the grinding disc 34 installed, the dust collecting cover 36 is provided to cover the whole outer circumference of the grinding disc 34. On the dust collecting cover 36, an opening/closing part 55 is provided to be opened/closed to expose part of the grinding disc 34 outward from the dust collecting cover 36. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a disk sander that rotates a grinding disk with a motor to grind or polish an object.

A disk sander is conventionally known as a machine tool for grinding an object to be ground. The disk sander rotates a grinding disk with a motor and abuts the surface of the object to be ground to grind the object to be ground.
A large amount of dust is generated during the operation of such a disc sander, and it is becoming common to have a dust collecting cover that covers the periphery of the grinding disc so as not to disperse the dust to the surroundings. (For example, patent document 1).

  The dust collecting cover disclosed in Patent Document 1 is equipped with a hose connected to a dust collecting device having a function of sucking air. Usually, the dust collector is provided separately from the disk sander. When the dust collector is activated, dust in the dust cover is sucked into the dust collector via the hose.

  Also, this dust collecting cover is made of rubber, and even if the surface to be ground is not flat, the rubber is deformed according to the surface shape of the object to be ground, and the brush provided at the lower end of the rubber is subject to grinding. Can always be in contact with the surface. According to such a disk sander, the entire outer periphery of the grinding disk is covered with the dust collecting cover, and the brush provided at the lower end of the dust collecting cover is always in contact with the surface to be ground, so that dust leaks. It is considered that there is little risk of losing.

  However, if the surface to be ground is a flat surface or a gentle curved surface, there is no problem with the above-described disc sander.However, if a wall is provided that rises perpendicularly to the surface to be ground, Even when trying to grind, the dust collection cover contacts the wall before the grinding disk and the grinding disk cannot approach the vicinity of the wall. I was told that I couldn't do it.

On the other hand, in order to observe a grinding site, there has conventionally been a disc sander in which a notch portion in which a part of a dust collection cover is notched is formed (see, for example, Patent Document 2).
According to this disc sander, since the grinding disc is exposed outward from the notch portion of the dust collecting cover, even if the wall is erected on the surface to be ground, the vicinity of the wall Can be ground.

Japanese Patent Laid-Open No. 10-264027 Japanese Patent Laid-Open No. 10-315134

  In the disk sander configured as in Patent Document 2, the vicinity of the wall can be ground, but the grinding disk is always exposed, and the grinding disk does not have to be exposed. Even if it exists, there exists a subject that dust may be scattered outside a dust collection cover.

Further, the conventional disc sander is configured to suck the dust in the dust collection cover by connecting a hose extending from the dust collector to the dust collection cover.
However, simply attaching the hose to the dust cover may cause the hose to loosen. When the hose is loosened, the hose contacts the object to be ground in the vicinity of the disk sander, which hinders the grinding operation. Therefore, there exists a subject that the structure which prevents the hose to connect from interfering with an operation | work is desired.

Also, in the conventional disc sander, the dust cover itself is formed of a material such as rubber that deforms. Therefore, the operator applies a load to the disc sander according to the unevenness of the surface to be ground, so that the operator The dust collecting cover is deformed by the applied load, and the dust collecting cover is always in contact with the surface to be ground.
However, if the dust cover itself is made of a material such as rubber that is easily deformed, when the hose to the dust collector is attached to the dust cover, the dust cover may not be deformed due to the weight of the hose. There was a problem that the dust cover might be deformed.

  Therefore, the object of the present invention is to reliably grind the vicinity of the wall without being obstructed by the dust collecting cover even when the wall to be ground is present on the surface to be ground. Provide a disc sander that can cover the grinding disc with a dust cover so that dust does not come out in places other than the vicinity of the wall, and even if a hose is attached to the dust cover, the hose will be in the way Provide a disc sander that can be operated without damaging, and even if a hose is attached to the dust collection cover, the dust collection cover will not be deformed, and the dust collection cover will be securely matched to the surface shape of the object to be ground. An object of the present invention is to provide a disc sander that can be kept in contact with a disk.

According to the disk sander of the present invention, in the disk sander that rotationally drives the mounted grinding disk, the dust collection cover is provided so as to cover the entire outer periphery of the grinding disk, An opening / closing part that can be opened and closed is provided to expose a part of the disk for use from the dust collecting cover to the outside.
By adopting this configuration, it is possible to expose a part of the grinding disk to the outside of the dust collection cover by opening the opening and closing part, so that the case where a wall is erected on the grinding target is However, the dust collecting cover does not come into contact with the wall, and grinding in the vicinity of the wall can be performed reliably. In addition, when not being used near the wall as described above, the dust can be prevented from being scattered by closing the opening / closing part.

  The opening / closing part may be a sliding door provided so as to be slidable along an arc of the dust collecting cover.

According to the disk sander of the present invention, in the disk sander that rotationally drives the mounted grinding disk, the dust collection cover is provided so as to cover the entire outer periphery of the grinding disk. A discharge port for discharging the dust in the dust cover is provided, and the discharge port is provided so that a discharge hose connected to the dust collecting device can be attached. The hose support part which supports so that the attached hose may not loosen is provided.
By adopting this configuration, the rear of the hose attached to the discharge port is supported by the hose support portion, so that the hose is not loosened and the hose can be prevented from interfering with the grinding operation. .

According to the disc sander of the present invention, the grinding disc provided with the main body having the motor for rotating the grinding disc and the dust collecting cover provided so as to cover the entire outer periphery of the grinding disc is mounted. In the disk sander that is driven to rotate by a motor, a mounting hole having a predetermined diameter is formed in the center of the dust collecting cover, and the main body is extended downward to attach the dust collecting cover. A cover mounting base portion having a diameter smaller than the diameter of the hole is provided, and a flange portion projecting outward so as to be larger in diameter than the diameter of the mounting hole of the dust collecting cover is provided at the lower end portion of the cover mounting base portion The dust collecting cover is prevented from coming off by inserting a cover mounting base into the mounting hole of the dust collecting cover, and the flange portion at the lower end of the cover mounting base contacting the edge of the mounting hole of the dust collecting cover. In addition, the dust cover is attached to the cover mounting base so as to be tiltable with respect to a gap generated between the inner wall surface of the mounting hole of the dust collecting cover and the outer wall surface of the cover mounting base. In order to constantly bias toward the flange part of the base part, the upper end part touches the cover mounting base part or a part of the main body, and the lower end part touches the upper surface of the dust collection cover. It is characterized in that a spring mounted so as to wind is provided.
The effect | action by employ | adopting this structure is as follows.
In other words, the worker may perform the grinding work by tilting the main body (that is, the grinding disk) according to the unevenness of the surface to be ground, but even in such a case, when the main body is tilted, Since the spring is compressed, the lower surface of the dust cover always comes into contact with the surface to be ground. In other words, even when the lower surface of the dust collection cover and the surface of the grinding target do not match, the lower surface of the dust collection cover can be brought into contact with the surface of the grinding target by the action of the spring.
As described above, in the present invention, the lower surface of the dust collection cover can always be brought into contact with the surface to be ground without forming the dust collection cover from a material such as rubber that is easily deformed. It is possible to prevent the dust collection cover from being deformed due to attachment to the dust cover or the like.

  According to the disc sander of the present invention, even if a wall is erected on the surface to be ground, if the opening / closing part is opened, the dust collecting cover does not contact the wall and the grinding disc is exposed. Therefore, it is possible to reliably perform grinding in the vicinity of the wall. In addition, when the grinding work is not performed near the wall, the dust can be prevented from being scattered by closing the opening / closing part.

  According to the disc sander of the present invention, since the hose is supported by the hose support portion, the hose is not loosened, and the hose can be prevented from interfering with the grinding operation.

  According to the disc sander of the present invention, the lower surface of the dust collection cover can be kept in contact with the surface of the grinding object in response to the unevenness of the surface of the grinding object without depending on the deformation of the dust collection cover itself. Even when the dust collecting hose is attached to the dust collecting cover, the dust collecting cover can be prevented from being deformed by the weight of the hose.

  The dust cover of the disc sander is provided with a sliding door that slides along the arc of the dust cover and opens and closes. By opening the sliding door, the grinding disk in the dust cover is exposed outside the dust cover.

The dust cover is attached to the cover mounting base provided on the body gripped by the operator so that there is a backlash, and the dust cover is located between the cover mounting base and the dust cover. A spring that can be urged by is attached. Specifically, the lower surface of the edge of the dust collection cover mounting hole abuts on the flange formed at the lower end of the cover mounting base, and a spring arranged so as to be wound around the cover mounting base. The dust collecting cover is biased so as to contact the flange portion.
The operator grips the main body and tilts the main body according to the unevenness of the surface to be ground, so that the grinding disc tilted integrally with the main body performs grinding according to the unevenness of the surface to be ground. On the other hand, the dust collection cover does not follow the movement of the main body due to the action of the spring, and the lower surface comes into contact with the surface to be ground so as not to leave a gap.

  Further, the dust collection cover is provided with a discharge port for discharging dust. The outlet is provided so that a hose extending to the dust collector can be attached. And the hose support part which supports the back side of the hose attached to the discharge port is provided. The hose support portion is fixed to the main body and is provided so that the load of the hose is not directly applied to the dust collection cover.

An embodiment of the disk sander of the present invention is shown in FIGS.
The disk sander 30 includes a main body 31, a grinding disk 34 that is rotationally driven by a motor (not shown) housed in the main body 31, and a dust collection cover that is provided so as to cover the outer periphery of the grinding disk 34. 36.

First, the structure of the main body 31 will be described.
The main body 31 includes a main body grip portion 33 extending in the horizontal direction, a motor built-in portion 35 provided at a tip portion of the main body grip portion 33, and a cylindrical portion 37 protruding downward from the motor built-in portion 35. ing.
An assist grip 38 is provided on the upper surface of the motor built-in portion 35. The assist grip 38 is fixed to a stay 39 that protrudes upward from both side surfaces of the motor built-in portion 35.
Since the assist grip 38 is provided above the grinding disk 34, the grinding disk 34 can be surely pressed onto the surface to be ground, and the grinding work can be easily performed.

A rotating shaft 40 connected to the drive shaft of the motor is provided below the motor built-in portion 35 and in the cylindrical portion 37 so as to protrude. An attachment portion 41 for attaching the grinding disk 34 is provided at the tip of the rotary shaft 40.
A mounting screw 42 is provided at the lower end portion of the rotating shaft 40, and the grinding disc 34 is mounted by being screwed into a screw hole 48 of the mounting portion 44 provided at the center of the grinding disc 34. Can be made.

The outer peripheral side of the cylindrical part 37 is attached to the dust collecting cover 36 and is formed in a cylindrical shape so as to cover the periphery of the rotary shaft 40 so that the rotary shaft 40 and the mounting part 41 are not exposed to the outside. Is provided. The cover attachment base portion 46 is a cylindrical member having a hole formed on the inside thereof, and is provided so as to extend downward from the motor built-in portion 35.
The inner wall surface of the upper part of the cover mounting base part 46 is formed with irregularities so that it can be fitted into a step part 45 formed at the lower part of the cylindrical part 37. The lower part of the cover attachment base 46 extends below the lower end of the cylindrical part 37, and the inner wall surface is formed without unevenness.

  A flange portion 47 that protrudes outward is provided at the upper end portion of the cover mounting base portion 46, and a concave portion 49 that is recessed downward is formed in the flange portion 47. The concave portion 49 is formed in a circular shape in plan view so as to surround the entire periphery of the cover mounting base portion 46, and the upper end portion of the spring 50 is accommodated in the concave portion 49.

A flange portion 51 protruding outward is also formed at the lower end portion of the cover mounting base portion 46. The flange portion 51 is formed as a retaining member for the dust collection cover 36.
That is, the lower surface of the edge of the mounting hole 52 formed in the central portion of the dust collecting cover 36 contacts the upper surface of the flange portion 51.

  The lower end of the spring 50 is in contact with the upper surface of the edge of the mounting hole 52 of the dust collecting cover 36. Accordingly, the spring 50 is compressed between the flange portion 47 of the cover mounting base 46 and the upper surface of the dust collecting cover 36 so that the dust collecting cover 36 is always pressed against the upper surface of the flange portion 51 at the lower end of the cover mounting base 46. It works.

Here, the grinding disk 34 will be described.
The grinding disk 34 is composed of a base 79 provided with a mounting portion 44 having a screw hole 48 formed in the center, and a ring-shaped grinding portion 80 attached to the outer peripheral edge of the base 79. Industrial diamond particles are attached to the grinding unit 80, and the lower surface of the grinding unit 80 abuts the grinding target, whereby the grinding target is ground.

Next, the dust collection cover 36 will be described.
The dust collection cover 36 is made of metal or plastic and has a larger diameter than the grinding disk 34 so as to cover the upper surface and the outside of the grinding disk 34 and is formed in a circular shape in plan view.
The dust collecting cover 36 includes an upper surface portion 36a having a diameter larger than that of the grinding disk 34, and a side surface portion 36b protruding downward from the outer peripheral edge portion of the upper surface portion 36a.
A mounting hole 52 having an inner diameter formed larger than the outer diameter of the cover mounting base 46 is formed at the center of the upper surface portion 36a. The dust collection cover 36 is attached to the cover attachment base 46 by inserting the lower end portion of the cover attachment base 46 into the attachment hole 52.

At this time, there is a slight gap between the inner wall surface of the mounting hole 52 of the dust collecting cover 36 and the outer wall surface of the lower end portion of the cover mounting base portion 46, and the dust collecting cover 36 is covered by the cover mounting base portion by this gap. 46 so that it can be tilted relative to 46.
However, although the dust collection cover 36 is attached to the cover attachment base 46 so as to be tiltable, the dust collection cover 36 is attached so as to be pressed against the flange 51 of the cover attachment base 46 by the spring 50 and has a force greater than a predetermined force. Thus, the dust collecting cover 36 is provided so as not to be inclined unless the spring 50 is compressed and deformed. The configuration of the spring 50 is as described above.

A part of the dust collecting cover 36 is cut out in plan view, and a slide door 55 that can be opened and closed by sliding along the circumferential direction of the dust collecting cover at the notched portion 66. Is provided.
The inner peripheral side of the slide door 55 is sandwiched between a door mounting plate 56 attached to the lower surface of the upper surface portion 36 a of the dust collection cover 36 and the lower surface of the upper surface portion 36 a of the dust collection cover 36. That is, the slide door 55 is mounted between the door mounting plate 56 and the upper surface portion 36a of the dust collection cover 36 so as to be slidable in the circumferential direction.

A brush 57 that protrudes downward is provided at the outer peripheral end of the dust collecting cover 36 so as to abut on the surface to be ground.
A brush 59 that protrudes downward is provided at the outer peripheral end of the slide door 55 so as to contact the surface to be ground.
Since the brushes 57 and 59 are provided, dust generated as a result of grinding is not leaked from the lower part of the dust collecting cover 36 to the outside during the operation of the disc sander 30, and the disc sander 30 is ground. However, since the brush sweeps the grinding surface by moving on the surface to be ground, dust can be collected in the dust collecting cover 36.

  Further, the dust collection cover 36 is formed with a discharge port 70 for discharging dust. The discharge port 70 is formed in an arc shape on the upper surface portion 36 a of the dust collection cover 36. Due to the circular arc shape, the dust easily flows out of the dust collecting cover 36 in accordance with the rotation of the grinding disk 34.

In order to attach a hose (not shown), a hose attachment portion 72 that protrudes rearward is provided at the discharge port 70. In the present specification, the rear means the direction in which the main body grip portion 33 extends from the position where the grinding disk 34 is provided.
The hose attachment portion 72 is formed in a cylindrical shape so that dust is circulated therein, and a hose is covered on the rear end portion thereof so that dust can be circulated in the hose.

A hose support portion 74 that supports the hose is provided behind the hose attachment portion 72. The hose support part 74 can prevent the hose from hanging down on the surface to be ground by supporting the rear side of the hose attached to the hose attachment part 72.
The hose support part 74 is a semi-circular shape having a diameter larger than the diameter of the hose so as to support the hose provided on the rear end part of the stay 76 and the stay 76 attached to the side surface of the motor built-in part 35 of the main body 31. It is comprised from the support part 78 formed in this.

  The attachment position of the stay 76 is not limited to the motor built-in portion 35 of the main body 31, and may be the cover attachment base 46 or the main body grip portion 33. That is, the hose support 74 may be attached to any part as long as it is attached to a part other than the dust collection cover 36. If the hose support 74 is attached to the dust collection cover 36, the weight of the hose is applied to the dust collection cover 36, the spring 50 is deformed, and the lower surface of the dust collection cover 36 is preferably in contact with the surface to be ground. This is because there is a possibility that it will become impossible.

Further, the support portion 78 may be provided so that the axial direction of the center of the semicircular shape is collinear with the axial direction of the hole inside the hose attachment portion 72.
If it does in this way, the hose attached to the hose attachment part 72 will extend in a straight line toward the back, and the suction of dust will be performed smoothly.

Hereinafter, the configuration of the slide door 55 and the operation of the slide door 55 will be described with reference to FIGS. 4 and 5.
As described above, the sliding door 55 slides in the circumferential direction with respect to the dust collecting cover 36, thereby opening a part of the dust collecting cover 36 and removing a part of the grinding disk 34 from a portion 66 cut out. Can be exposed to the outside.

  On the upper surface of the slide door 55, a cylindrical screw part 60 protruding upward and a wing nut 61 screwed into the screw part 60 are provided. The wing nut 61 has a function that an operator can grasp when opening and closing the slide door 55. On the other hand, the screw portion 60 has a function as a stopper that stops the slide door 55 at an appropriate position with respect to the dust collection cover 36 when the slide door 55 is opened and closed.

The dust collecting cover 36 has an end surface of the cut-out portion 66 of the upper surface portion 36a, and is located at a position where the screw portion 60 contacts when the sliding door 55 is fully opened and fully closed. Concave portions 62 and 64 for holding the screw portion 60 formed along the circumferential direction of the cover 36 are formed.
The concave portion 62 is formed at a position where the screw portion 60 is accommodated when the slide door 55 is closed, and the concave portion 64 is formed at a position where the screw portion 60 is accommodated when the slide door 55 is opened. .

  Each of the concave portions 62 and 64 is formed to be slightly wider than the diameter of the screw portion 60, and when the screw portion 60 is stored, the screw portion 60 is held. Further, by tightening the wing nut 61 at this position, the edges of the concave portions 62 and 64 of the dust collecting cover 36 are sandwiched between the lower surface of the wing nut 61 and the upper surface of the slide door 55, so that the slide door 55 is collected. Since it is fixed to the dust cover 36, it is possible to prevent the slide door 55 from moving during the grinding operation.

  In the above-described embodiment, the sliding door that is opened and closed by sliding the dust collecting cover in the circumferential direction has been described as the opening and closing unit for exposing the grinding disk from the dust collecting cover. It is not limited to such a form.

The disc sander of the present invention can be used for finishing or waterproofing of a concrete surface in a building or for ground treatment before painting.
Furthermore, it can be used for various purposes such as grinding of stone or FRP.

  While the present invention has been described in detail with reference to a preferred embodiment, the present invention is not limited to this embodiment, and it goes without saying that many modifications can be made without departing from the spirit of the invention. .

It is a top view of a disk sander. It is a front view of a disk sander. It is a side view of a disk sander. It is a top view of the disk sander which shows the state in the middle of trying to open a slide door. It is a top view of the disk sander which shows the place which opened the slide door and exposed the disk for grinding.

Explanation of symbols

30 Disc sander 31 Main body 33 Main body grip part 34 Grinding disk 35 Motor built-in part 36 Dust collecting cover 36a Upper surface part 36b Side surface part 37 Cylindrical part 38 Assist grip 39, 76 Stay 40 Rotating shaft 41, 44 Mounting part 42 Screw 45 Step Portion 46 Cover mounting base 47, 51 Flange portion 48 Screw hole 49 Recess 50 Spring 52 Mounting hole 55 Slide door 56 Door mounting plate 57, 59 Brush 60 Screw portion 61 Wing nut 62, 64 Recess 66 Notched portion 70 Discharge port 72 Hose attachment part 74 Hose support part 78 Support part 79 Base 80 Grinding part

Claims (4)

In the disk sander that rotates the mounted grinding disk,
A dust collection cover is provided to cover the entire outer periphery of the grinding disk,
A disc sander characterized in that the dust collecting cover is provided with an opening / closing part that can be opened and closed to expose a part of the grinding disc from the dust collecting cover to the outside. The opening / closing part is
2. The disc sander according to claim 1, wherein the disc sander is a sliding door slidably provided along an arc of the dust collecting cover. In the disk sander that rotates the mounted grinding disk,
A dust collection cover is provided to cover the entire outer periphery of the grinding disk,
The dust cover is provided with a discharge port for discharging the dust in the dust cover,
The discharge port is provided so that a discharge hose connected to the dust collector can be attached,
A disc sander characterized in that a hose support portion is provided behind the discharge port so as to support the hose attached to the discharge port so as not to loosen. In a disk sander that includes a main body having a motor that rotationally drives a grinding disk, and a dust collection cover that is provided so as to cover the entire outer periphery of the grinding disk, and that rotates the grinding disk that is mounted by a motor.
A mounting hole having a predetermined diameter is formed in the center of the dust collecting cover,
The main body is provided with a cover mounting base that extends downward and has a smaller diameter than the diameter of the mounting hole of the dust collection cover,
At the lower end portion of the cover mounting base portion, a flange portion protruding outward is formed so as to be larger in diameter than the diameter of the mounting hole of the dust collecting cover,
The cover mounting base is inserted into the dust collecting cover mounting hole, and the dust collecting cover is prevented from coming off by the flange portion at the lower end of the cover mounting base coming into contact with the edge of the dust collecting cover mounting hole. The dust collection cover is attached to the cover mounting base so as to be tiltable with respect to the gap generated between the inner wall surface of the cover mounting hole and the outer wall surface of the cover mounting base.
In order to constantly urge the dust collecting cover in the direction of the flange of the cover mounting base, the cover is arranged such that the upper end contacts the cover mounting base or a part of the main body and the lower end contacts the upper surface of the dust collecting cover. A disc sander comprising a spring mounted so as to wind around the outer wall surface of the mounting base.

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