JPH1158321A - Dust collection mechanism of trimmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a visual field of a working part while a dust collection efficiency of a worked dust is achieved to be improved by a method wherein a suction nozzle collecting the worked dust is pinched as another body between a base and a base plate, and its suction opening is opposed near to an opening part of the base plate. SOLUTION: In a trimmer T, a suction nozzle 5 is pinched as another body between a base 4 and a base plate 7. Further, a nozzle opening extends radially, and a tip faces a suction chamber on its circular ring wall. A connection opening 6 comes in protrusion contact with a rear end of the nozzle opening, and the connection opening 6 connects a hose of a suction device for sucking a worked dust. When the nozzle opening is opposed to the suction chamber thus, since the nozzle opening does not exist near to bit, a visual field of a working part from all directions is secured. In working, the worked dust is exhausted to a suction device from the connection opening through the nozzle opening via the suction chamber from an opening part 7a provided to the base plate 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trimmer dust collecting mechanism for collecting machining dust generated from a bit at the time of machining by using a trimmer for machining a workpiece such as grooving.

[0002]

2. Description of the Related Art There is a trimmer as a tool for performing grooving at a predetermined position on a workpiece at a predetermined depth.

In this trimmer, a main body composed of an electric motor is supported by a cylindrical base so as to be vertically adjustable, a base plate is attached below the base, and a bit attached to a lower end of the main body is projected from the base plate through an opening of the base plate. At least, the bit is machined to a predetermined depth while the base plate is in contact with the surface of the workpiece.

In a conventional trimmer, the base plate has no dust collecting mechanism, or the suction nozzle is formed integrally with the base plate at a position away from the bit position.

[0005]

However, in the case of the conventional mechanism, the dust collecting efficiency was poor because the tip of the nozzle was separated from the processing portion as described above for reasons such as securing the visibility of the processing portion.

In addition, since it is formed integrally with the base plate, the field of view of the machined part may be obstructed depending on the working posture of the operator, and the position of the nozzle cannot be changed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a dust collecting mechanism capable of increasing a dust collecting efficiency of processing dust by making a suction port of a nozzle close to a processing portion and securing a visibility of a processing portion.

[0008]

SUMMARY OF THE INVENTION Accordingly, the present invention is a trimmer in which a bit is driven by an electric motor built in a main body. The trimmer has a housing and an opening at the lower end through which the bit can freely penetrate. A trimmer comprising a base having a flat plate portion, and a base plate having an opening through which a bit can freely penetrate in the vicinity of a central portion of the base plate, which slides on an upper surface of a workpiece below the base; A suction nozzle, which is separately clamped between the plates and has a suction port facing the opening of the base plate to collect processing dust, and a suction device protruding from a side of the suction nozzle are inserted and attached. And a cylindrical connection port. Further, the suction nozzle includes a circular ring for processing around the opening of the base plate, a suction chamber provided inside the circular ring, and a nozzle port in the suction chamber. Further, the base plate includes an opening having a cutout portion in which a part of a side surface has an oblique cross-sectional shape, and the suction nozzle makes a suction port approach the cutout portion obliquely from a side of the opening. If the nozzle opening is provided, the dust collection efficiency is improved.

Further, in order to ensure a view of the processing portion, the suction nozzle is provided with at least a collar supported on the base or the base plate, and a circular ring whose inner surface is in contact with the collar and which is rotatable with respect to the axis of the trimmer. And to be provided.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the illustrated embodiment.

According to the embodiment shown in FIG. 1, a trimmer T of the present invention is provided with an electric motor (not shown) 1 built in a main body 1, and is a cutting tool for processing wood or the like at the lower end of the main body 1. A bit 2 is rotatably mounted. The main body has a cylindrical housing 3, and the housing 3 is mounted on a cylindrical base 4 made of a transparent material so that the vertical position can be adjusted. The base 4 includes a holding portion 4a for holding the housing 3 and a flat plate portion 4b having an opening 4c through which a bit can freely pass at the lower end of the holding portion. A base plate 7 made of a transparent plastic material or the like, which slides on the surface of a workpiece such as wood, is provided below the base with an opening 7a through which a bit can pass.

The trimmer T is provided with a suction nozzle 5 which is the most important feature of the present invention and is separately inserted between the base 4 and the base plate 7.

This trimmer T is used when processing the surface of a wooden member or the like, and grips the upper part of the electric motor 1 along the scribe line on the surface of the workpiece. By moving, a groove or the like having a constant depth is processed.
The suction nozzle which is a feature of the present invention will be described with reference to the embodiment of FIGS. 2 and 3 in which the base plate 7 is formed larger than the size of the base 4.

In the suction nozzle 5, a circular ring 5c surrounding the opening 7a of the base plate is sandwiched between the base 4 and the base plate 7, and a suction chamber 5a is provided inside the circular ring 5c.

A nozzle port 5b extends in the radial direction, and the tip of the circular port wall faces the suction chamber 5a. At the rear end of the nozzle port 5b, a connection port 6 is provided so as to project therefrom. The connection port 6 is for connecting a hose of a suction device (not shown) for sucking the processing dust.

The suction nozzle (5) and the connection port (6) are preferably made of a transparent resin or the like.

If the nozzle port 5b faces the suction chamber 5a in this way, since there is no nozzle port near the bit, the field of view of the processed portion from all directions is secured.

At the time of processing, the processing dust is discharged from the opening 7a provided in the base plate, through the suction port 5a, through the nozzle port 5b through the connection port 6, and into the suction device.

The circular ring 5c is provided with a screw mounting portion 5d every 90 degrees, and a screw is mounted on the screw mounting portion 5d to be detachably clamped between the base 4 and the base plate 7.

According to this embodiment, the screw mounting portion 5d
Are formed at every 90 degrees, so that the position of the connection port 6 can be changed to desired four positions, the position of the nozzle port 5b can be changed with respect to the base plate 7,
At the time of work, the work can be performed while looking at the processed portion without being obstructed by the hose of the suction device.

Next, another embodiment will be described with reference to FIGS.

FIG. 4 shows that a circular collar 9 having several holes 9b on the side surface through which machining dust can pass is provided between the base 4 and the base plate 7, and sliding protrusions 9a are provided at four locations outside the collar 9. A circular ring 8 whose inner wall is in contact with the projection 9a and is rotatable with respect to the axis of the bit 2 is provided.

On the other hand, a screw hole 4d is provided in the flat plate portion 4b of the base 4, and a screw s is inserted through the screw hole 4d into the screw hole 9c of the projection 9a, and further inserted into the base plate 7 to form a flat plate. A circular ring 8 is rotatably held between the base plate 7 and the portion 4b.

The tip of the nozzle port 8a is provided to penetrate from the inner wall to the outer wall of the circular ring 8, and the rear end, that is, the outer wall portion, is provided with a connection port 6 protruding laterally.

The collar 9 and the circular ring 8 are also preferably made of a material such as a colorless and transparent resin which can secure the view.

In such a mechanism, the circular ring 8 is slidable with respect to the collar 9, and the position of the nozzle port 8ab can be freely adjusted.

In the embodiment shown in FIG. 4, the collar 9 is formed as an integral body. However, as shown in FIG. 5, several collars 10 may be evenly arranged on a concentric circle.

Here, the above-mentioned collars 9 and 10 are manufactured so that the vertical dimension is slightly larger than the vertical dimension of the circular ring 8, and a clearance is provided between the base 4 and the base plate 7 and the circular ring 8. Therefore, it is necessary to secure rotation of the circular ring 8.

The collars 9 and 10 may be formed separately from the base 4 and the base plate 7 and attached by fixing means such as screws, or may be formed integrally with the base 4 or the base plate 7. .

According to this embodiment, as shown in FIG. 6, since the circular ring 8 can freely rotate with respect to the axis of the bit 2, the position of the connection port 6 can be freely changed, and it is possible to change the position even during work. It is possible to secure the field of view of the processed portion without being rotated by the position of the suction device and being disturbed by the hose of the suction device.

FIG. 7 shows a suction nozzle 11 having a different shape.
2 shows a dust collecting mechanism of the trimmer T to which the trimmer T is attached.

According to this embodiment, the suction nozzle 11 is provided at the tip of the nozzle port 11a with a disk 11b having a larger diameter than the opening 7a of the base plate provided with an opening through which a bit can penetrate. A boss 13 is provided on the side of the nozzle plate 11 so that the suction nozzle 11 can be screwed to the base plate 7 from both sides of the nozzle port 11a. Further, a connection port 12 for connecting a hose of the suction device is provided at a rear end of the nozzle port 11a.

The notch 14a is formed below the grip 4a of the base 4 (see FIG. 9), and the flat plate 4b of the base 4 is formed.
Is provided with a notch 14b in a fan shape (see FIG. 9), and the suction nozzle 11 is attached from the side toward the opening 7a of the base plate.

For mounting the suction nozzle 11, the disk portion 11b is fitted into a recess having substantially the same diameter as the disk provided on the base plate, and the boss 13 is screwed to the boss 13 to be fixed to the base plate 7.

The opening 7a of the base plate is provided with a notch 7b having a slope 7c whose side surface is machined into an oblique cross-sectional shape, and is mounted so that the tip of the nozzle port 11a faces the notch 7b. In this embodiment, the tip of the nozzle port 11a can be brought close to the processing part, and the dust collection efficiency of the processing dust can be further improved.

[0036]

As described above, according to the first aspect of the present invention, the suction nozzle is formed separately from the base and the base plate. Processing dust can be removed, visibility can be secured, and work errors can be reduced. Further, since it is detachable, it can be detached and used when unnecessary, and the nozzle can be formed rotatable with respect to the base and the base plate.

According to the second aspect of the present invention, since the suction chamber is provided, the operation can be performed without obstructing the field of view.

According to the third aspect of the present invention, since the tip of the nozzle port can be brought close to the processing portion, dust collection efficiency can be further improved, the visibility of the processing portion can be secured, and work errors can be reduced. Can be achieved.

According to the fourth aspect of the present invention, since the circular ring provided with the connection port is rotatable, the position of the connection port can be freely changed even during operation, so that the field of view is blocked by the hose of the suction device. It can work efficiently without any.

[Brief description of the drawings]

FIG. 1 is an overall view of a trimmer including a dust collecting mechanism according to an embodiment of the present invention.

FIG. 2 is a sectional view of a dust collecting mechanism equipped with the suction nozzle of the present invention.

FIG. 3 is a partial cross-sectional plan view showing a mode of mounting a suction nozzle.

FIG. 4 is an exploded perspective view showing the structure of a rotatable suction nozzle.

FIG. 5 is a perspective view of a base plate supporting a collar.

FIG. 6 is a partial sectional plan view showing an embodiment of a rotatable suction nozzle.

FIG. 7 is an overall view of a trimmer provided with a dust collecting mechanism equipped with a suction nozzle according to another embodiment of the present invention.

FIG. 8 is a sectional view of a dust collecting mechanism equipped with the suction nozzle of FIG. 7;

FIG. 9 is a perspective view of a base in the embodiment of FIG. 7;

FIG. 10 is a perspective view of a base plate in the embodiment of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric motor 2 bit 3 Housing 4 Base 5 Suction nozzle 6 Connection port 7 Base plate 8 Circular ring 9 Collar 10 Collar 11 Suction nozzle 12 Connection port 13 Boss 14 Notch T Trimmer s Screw

Claims (4)

[Claims] 1. A trimmer whose bit is driven by an electric motor built in a main body, said base comprising a housing, a flat plate portion gripping the housing and having a lower end having an opening through which the bit can freely pass. A trimmer comprising a base plate which slides on the upper surface of the workpiece below the base and has an opening through which a bit can penetrate in the vicinity of the center thereof, and is separately clamped between the base and the base plate. A suction nozzle for collecting processing dust with a suction port facing the vicinity of the opening of the base plate, and a cylindrical connection port for inserting a suction device protruding from a side of the suction nozzle. A dust collecting mechanism for a trimmer. 2. The suction nozzle includes a circular ring surrounding the opening of the base plate, a suction chamber provided inside the circular ring, and a nozzle port facing the suction chamber. The dust collecting mechanism for a trimmer according to claim 1, wherein: 3. The base plate includes an opening having a notch having a part of a side surface having an oblique cross-sectional shape,
2. The trimmer dust collecting mechanism according to claim 1, wherein the suction nozzle has a nozzle port whose suction port is made to approach the notch obliquely from a side of the opening. 4. The suction nozzle includes: a collar supported on at least the base or the base plate; and a circular ring having an inner surface in contact with the collar and rotatable with respect to an axis of a trimmer. The dust collecting mechanism for a trimmer according to claim 1.