JP2944909B2 - Thunder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sander for grinding or polishing not only metal products and materials but also products and parts or materials such as wood and plastic.

[0002]

2. Description of the Related Art Conventionally, as a sander of this type, a rotary power source (motor using compressed air) is housed in a sander casing, and a rotary disk having sandpaper adhered to the lower surface thereof is screwed exchangeably. A sander provided with a rotating output member (output shaft) is known (see, for example, Japanese Utility Model Laid-Open No. 3-126573).

The sander is suitable for sanding a relatively wide flat surface, but cannot be used when a finger-like movement is required in a narrow place, a deformed portion, a curved surface, an uneven surface, or the like. Therefore, as a sander provided with a processing member that moves like a finger, a sander illustrated in FIG. 13 has been proposed.
(See Japanese Utility Model Publication No. 6-34929).

In a sander 70 shown in FIG. 13, a main body 72 having a handle 71 is composed of a first main body portion 72A and a second main body portion 72B, and a pneumatic motor (not shown) is housed in the first main body portion 72A. The second body portion 72B accommodates displacement restricting means (not shown), and a processing member 74 having a driving piece 73 is connected to the displacement restricting means via a connecting piece 75, and the driving piece 73 is connected. It is attached to the output shaft of the pneumatic motor together with the piece 75 via a cam mechanism so as to be relatively rotatable.

[0005]

By the way, in the latter case of the above-mentioned prior art, sanding work such as details and corners can be performed by giving a free movement like a fingertip to the processing member 74, but relatively. For the sanding of a wide flat surface, the former of the prior art having a disk-shaped processing member is more efficient. Therefore, the former and latter sanders had to be prepared.

SUMMARY OF THE INVENTION The present invention has been made in view of the above situation, and has as its object to perform a sanding operation for a relatively wide flat surface and a sanding operation for details and corners by one unit. To provide a good sander.

[0007]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, the present invention provides a sander in which a rotary power source is housed in a casing of a sander main body and includes a rotation output member to which a processing member is exchangeably mounted, at a processing member mounting side end of the sander casing, A processing member having a reciprocating driving piece is detachably attached via an attachment, and the driving piece of the processing member is detachably mounted on the rotation output member, and is driven by the power of the rotation output member. It is characterized by being linked to the attachment so as to reciprocate.

Further, according to the present invention, the attachment may be:
It is characterized in that it can be mounted at any angle to the sander casing. Further, the present invention is characterized in that the processing member provided with the driving piece is mounted on the elastic member and the rotation output member via a stand plate.

[0009]

According to the present invention, when sanding a relatively wide plane, the attachment is removed from the sander casing, and the disk-shaped processing member is directly mounted on the (eccentric) rotary output member to perform the sanding operation. At this time, the processing member is rotatable, but performs a circular motion with the eccentric amount as a radius with respect to the axis of the rotary power source.

Next, when sanding a narrow place or a deformed portion, a working member provided with a driving piece is attached to a sander casing via an attachment (and an elastic member), and the driving piece of the working member is connected to the above-mentioned ( (Eccentric) Sanding work such as grinding and polishing is performed by being detachably attached to the rotation output member. At this time, the processed member performs a combined movement of back and forth reciprocation and left and right swing, and fine and fine sanding can be performed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 12 show an embodiment of the present invention. FIG. 1 is a perspective view showing a state in which a processing member 6 provided with a driving piece 5 is attached to a sander main body 1 via an attachment 2, an elastic member 3, and a stand plate 4. 2 and 3 are a perspective view and a front view, respectively, showing a state in which the disk-shaped processing member 7 is directly mounted on the sander main body 1, and FIG. 4 is an exploded perspective view of the sander main body 1.

The sander body 1 includes an L-shaped casing 8 having a handle 8A, a cap 9 and a hose joint 10, a rotary power source 11 using compressed air incorporated in the casing 8, and an eccentricity. Rotating output member 12
And the compressed air supply valve mechanism 13 and its operation lever 14
And a rubber grip 15 (see FIG. 4).

The casing 8 is provided with a cylindrical attachment mounting portion 8B at the opposite end (the end on which the processing member is mounted) of the cap 9. A rotary power source 11 is incorporated in the casing 8 from the cap 9 to the lower end of the attachment mounting portion 8B, the valve mechanism 13 is incorporated in the handle 8A, and a hose joint 10 is mounted on the outer end of the handle 8A. , 17, screwed,
A muffler 18 is incorporated inside.

As shown in FIG. 4, the rotary power source 11 includes an upper ball bearing 19, an upper ring 20, a rotor 21, a rotor blade 22, a rotor spacer 23, and a cylinder 24 having a plurality of eccentric flanges 24A on the outside.
Spring roll pins 26, 26 for connecting the lower ring 25 and the upper and lower rings 20, 25 to the flange 24A.
And a lower ball bearing 27, a balancer 28 having an eccentric hole for fitting an output member, and a balancer set pin 2.
9, an output member set screw 30, a ball bearing 31, and a snap ring 32.

When the power source 11 supplies compressed air into the cylinder 24, the rotor 21 rotates and the balancer 28 connected to the rotor 21 rotates. The rotation output member 12 rotatably fitted to the rotor 21 via a bearing 31 in a circular motion (eccentric rotation) around the axis of the rotor 21.
I do.

The compressed air supply valve mechanism 13 comprises a throttle bush 33, a throttle pin 34, a urethane ball 35, a spring 36, a rolling ring 37, a regulator 38 and a snap ring 39, as shown in FIG. The bush 33 is pushed by the operation lever 14 to open and close the air supply passage. In addition, 40 is a lever mounting pin.

The output member 12 is provided with a screw hole (not shown) into which the screw portion 7A of the processing member 7 is screwed. The processing member 7 is the same as the conventional one, and a polishing member 7D such as sandpaper is detachably attached to a disk 7B via a sponge body 7C. When the work is performed using the processing member 7, a relatively wide flat surface can be sanded as in the related art.

A large number of circular pin insertion holes 12A are formed in the output member 12 at predetermined intervals in the circumferential direction, and a semicircular cutout 8C is formed in the attachment mounting portion 8B. Is inserted into the pin insertion hole 12A, and the middle of the pin is engaged with the notch 8C so that the rotation of the output member 12 is prevented. The work of attaching and detaching is easy.

As shown in FIGS. 5 to 8, the attachment 2 has a ring-shaped mounting portion 41 which is externally fitted to the attachment mounting portion 8B of the sander casing 8, and is parallel to the central axis of the mounting portion 41. An elastic member mounting hole 42 having a central axis, a part of the mounting part 41 is cut open, and a screw hole 44 into which a stop bolt 43 is screwed and a bolt insertion hole 45 are provided. The attachment portion 41 can be attached to the 8B at an arbitrary angle.

The attachment hole 42 of the attachment 2
A positioning step 46 of a covered cylindrical mount cover 47 is provided concentrically on the lower surface of the cover. As shown in FIG. 5, the elastic member 3 (mount) has a cylindrical main body 4 made of an elastic material such as rubber having flanges 48A at both ends in the axial direction.
8, the heads of upper and lower bolts 49 and 50 are embedded and integrated into both ends in the axial direction. The upper bolt 49 is inserted into the mounting hole 42 of the attachment 2 and the mounting hole 47A of the mount cover 47, It is attached to the attachment 2 together with the mount cover 47 by a cap nut 51.

The stand plate 4 (connecting piece) is detachably attached to the lower bolt 50 of the elastic member 3 via a washer 52 via a washer 52. As shown in FIGS. 5 and 6, the stand plate 4 has a flange-shaped engaging piece 5 protruding from one end of the strip-shaped plate on both sides in the width direction.
An elastic member mounting hole 55 is provided near the engagement piece 54, and a mounting hole 56 for the output member 12 is provided at the other end.

The processing member 6 has substantially the same shape as a conventionally known one, and a driving piece 5 is integrally connected to one end in the longitudinal direction of an abrasive mounting substrate 6A such as a sandpaper. A reverse L-shaped engagement piece 57 is formed to face each other, and a mounting hole 58 is provided at the outer end of the drive piece 5. Further, the engagement piece 54 of the stand plate 4 is inserted between the engagement pieces 57. Further, a magic tape 59 is adhered to the lower surface of the substrate 6A,
A polishing member 60 such as a sandpaper is detachably attached.

Then, the driving piece 5 of the processing member 6 and the stand plate 4 are screwed into the screw holes of the output member 12 with the fixing bolts 61 inserted into the respective mounting holes 56 and 58. It is attached detachably. Since the center axis of the screw hole of the output member 12 is eccentric with respect to the center axis of the rotor 21, the outer end of the driving piece 5 is eccentric about the center axis of the rotor via the fixing bolt 61. Rotate on a circle whose radius is the quantity.

Therefore, the polishing member 60, together with the substrate 6A of the processing member 6, is reciprocated in the longitudinal direction (front-back direction) and oscillated in the width direction (left-right direction) due to the deformation of the cylindrical body 48 of the elastic member 3. Performs complex movements (free movements like fingertips in manual work), allowing for subtle sanding. The angle at which the attachment 2 is attached to the grip 15 of the sander casing 8 is adjusted by the set screw 4
3 can be changed arbitrarily by loosening, and it is possible to obtain an optimal state for the work site.

As shown in FIGS. 9 and 10, the attachment mounting portion 8B of the sander casing 8 is polygonal (octagonal in the example), and the inner peripheral surface of the ring-shaped mounting portion 41 of the attachment 2 is also formed. 11, a polygon (in the example, an octagon) as shown in FIG. 11, the set screw 43 is screwed into the screw hole 62 provided in the mounting portion 41 without opening the mounting portion 41, and the mounting portion 8B is formed. The attachment portion 41 can be fitted to the attachment portion 4B by arbitrarily selecting the orientation of the attachment 2.

Further, as the processing member 6, one having a shape and structure that is optimal for the shape of the processing portion and the like can be adopted in addition to those illustrated in FIG. 12. The elastic member 3 and the stand plate 4 serving as a connecting member are attached to the attachment 2 so that only the processing member 6 may be detached and replaced, and the attachment 2 may be replaced with the sander body 1 as necessary.
The processing member 6 or 7 is attached to and detached from the mounting portion 8B, and various sanding operations can be performed by one sander body 1.

The present invention is not limited to the above embodiment. For example, the rotary power source 11 of the sander main body 1 can be constituted by a conventionally known air motor and an eccentric rotating mechanism. The design can be changed as appropriate, for example, by omitting it.

[0028]

As described above, the present invention relates to a sander provided with a rotary output member in which a rotary power source is housed in a casing of the sander body and a processing member is replaceably mounted. At the processing member mounting side end, a processing member having a reciprocating driving piece is removably attached via an attachment, and the driving member of the processing member is removably mounted on the rotation output member. Also, it is characterized in that it is connected to the attachment so as to reciprocate by the power of the rotary output member, so that a processing member suitable for the processing part is appropriately selected according to the shape and structure of the processing part. It can be selected and mounted, and various sanding operations can be performed by one sander.

Further, according to the present invention, the attachment may include:
It is characterized by being able to be attached to the sander casing at an arbitrary angle, so that the orientation and working posture of the processing member is optimized according to the shape and structure of the processing part, and efficient Sanding work can be performed. Further, the present invention is characterized in that the processing member provided with the driving piece is mounted on the elastic member and the rotation output member via a stand plate, and thus the processing member can be attached to and detached from the elastic member. It is easy and the exchange work efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a disk-shaped processing member mounted state in the embodiment.

FIG. 3 is a front view of FIG. 2;

FIG. 4 is an exploded perspective view of the sander main body in the embodiment.

FIG. 5 is a central longitudinal sectional view of a main part in the embodiment.

FIG. 6 is an exploded perspective view of a main part (FIG. 5) in the embodiment.

FIG. 7 is a front view of the attachment in the embodiment.

FIG. 8 is a plan view of FIG. 7;

FIG. 9 is a partial front view showing another example of the shape of the processed member mounting portion of the sander casing.

FIG. 10 is a view as viewed from the direction indicated by the arrow A in FIG. 9;

FIG. 11 is a plan view showing a modification of the attachment.

FIG. 12 is a perspective view showing another example of the shape of a processed member.

FIG. 13 is a perspective view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thunder main body 2 Attachment 3 Elastic member 4 Stand plate 5 Driving piece 6 Processing member 7 Disk-shaped processing member 8 Sander casing 8B Processing member mounting part 11 Rotary power source 12 Eccentric rotation output member

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-216780 (JP, A) JP-A-2-39862 (JP, U) JP-A-4-13255 (JP, U) JP-A-5-213 86459 (JP, U) JP-A 3-126573 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B24B 23/00-23/04 B25F 3/00

Claims (3)

(57) [Claims] 1. A sander in which a rotary power source is housed in a casing of a sander main body and has a rotary output member to which a processing member is exchangeably mounted. A processing member having a moving driving piece is detachably attached via an attachment, and the driving piece of the processing member is detachably mounted on the rotation output member, and reciprocates by the power of the rotation output member. A sander characterized by being linked to an attachment to exercise. 2. The sander according to claim 1, wherein the attachment is attachable to the sander casing at an arbitrary angle. 3. The sander according to claim 1, wherein the processing member provided with the driving piece is mounted on an elastic member and a rotation output member via a stand plate.