JP2002234001A - Trimmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply adjust a cutting depth. SOLUTION: A slit 8 is formed to the cylindrical part 4 of a base 2, in which a main body 5 is loosely inserted, in the axial direction of the base and shaft support parts 11 and 11 are provided on both end sides of the slit 8 in a protruded state and a roller 13, of which the peripheral surface can come into contact with the surface of the main body 5, is supported between the shaft support parts 11 and 11 in a revolvale manner by shafts. Therefore, when the main body 5 is grasped and the roller 13 is rotated by the thumb or the like, the base 2 can be slid in the axial direction through the roller 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bit protruding from the lower surface of a base by inserting a main body to which a bit can be attached at a lower end into a cylindrical base so as to be slidable and being fixed at a predetermined sliding position. The length, ie, the depth of cut, is adjustable.

[0002]

2. Description of the Related Art The above-mentioned trimmer is disclosed in
As disclosed in Japanese Patent No. 013, a main body to which a bit can be attached at a lower end, a cylindrical base in which the main body is slidably inserted and a bit can protrude from a lower surface, and the main body is provided with a predetermined slide relative to the base. By fixing at the position, the bit protruding from the lower surface of the base can cut the workpiece. Also, here, as the adjustment of the projecting length of the bit, that is, the depth of cut, the tip of the thumb screw screwed to the base is pressed against the tapered groove formed on the surface of the main body to regulate the slide of the base, Alternatively, there is disclosed a mechanism in which a rack provided on the main body side and a dial provided with teeth which mesh with the rack on the base side are provided, and the base is slid with respect to the main body by rotating the dial.

[0003]

In any of these adjusting mechanisms, it is necessary to rotate the thumbscrew or dial with the other hand while holding the main body with one hand, and both hands are always required. It looks like it is full. Therefore, for example, when it is desired to check the protruding length of the bit on the scale, a separate procedure of once placing the trimmer on a work bench or the like is required, and the adjustment operation is troublesome.

[0004] In view of the above, an object of the present invention is to provide a trimmer excellent in operability, with a simple structure, in which the cutting depth can be easily adjusted while being gripped by hand. is there.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a peripheral surface of the base is in contact with an outer surface of the main body, and the base is relatively moved in the sliding direction of the main body. A rollable roller is provided so as to be exposed at least in a state where the fixing of the main body is released. According to the second aspect of the present invention, in addition to the object of the first aspect, in order to smoothly slide the base through the roller, the roller is provided so as to be finely movable in the front-rear direction toward the main body. . The third aspect of the present invention is the first aspect.
Or, in addition to the object of 2, the fixing of the main body is performed by a clamp that locks between both ends of the slit provided in the base, and the roller is provided so that the cutting depth can be adjusted more easily. Is provided at a position covered by the clamp in the slit.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of the trimmer, FIG. 2 is a left side view showing a part in cross section, and FIG. 3 is a left side view of the base.
The trimmer 1 has a base 2 in which a cylindrical portion 4 stands upright on a square plate 3 provided at the lower end, and a trimmer 1 that can be loosely inserted into the cylindrical portion 4 of the base 2 from above and is rotated by a built-in motor. The main body 5 has a shaft 6 projecting downward.
Further, a through hole 7 is formed in the plate 3 of the base 2,
When the main body 5 is loosely inserted into the cylindrical portion 4, a bit attached to the rotating shaft 6 can penetrate the plate 3 and protrude downward. And depth.

On the other hand, a slit 8 is formed in the cylindrical portion 4 of the base 2 in the axial direction, and between the locking portions 9 projecting toward the front at both ends of the slit 8 can be locked. A clamp 10 is provided so that the main body 5 loosely inserted into the cylindrical portion 4 can be fixed at an arbitrary position. Similarly, on both ends of the slit 8, above the locking parts 9, 9, shaft supporting parts 11, 11 are projected toward the front, and between the shaft supporting parts 11, 11.
A roller 13 in which a center pin 14 is disposed along the circumferential direction of the cylindrical portion 4 is rotatably supported by inserting the pin 14 into through holes 12 formed in the shaft supports 11. ing. The roller 13 is made of a synthetic resin, and its peripheral surface abuts on the main body 5 in a state where the main body 5 is loosely inserted into the cylindrical portion 4, and the roller 13 moves on the main body 5 with relative sliding between the base 2 and the main body 5. Rolling is relatively possible in the sliding direction. or,
Here, since the through holes 12 and 12 are formed in an oval shape facing the main body 5, the roller 13 is provided with the through holes 12 and 1.
The main body 5 can be finely moved in the front-rear direction by the movable range of the pin 14 in the inside 2.

In the trimmer 1 configured as described above, when adjusting the cutting depth of the bit mounted on the rotating shaft 6, the clamp 10 is released and the main body 5 is loosely inserted into the cylindrical portion 4 of the base 2. In this state, as shown in FIG. 4, while holding the main body 5 with one hand and pressing the peripheral surface of the roller 13 with the thumb to rotate the roller 13 in an arbitrary direction, the roller 13 rolls the peripheral surface of the main body 5. By moving, the base 2 slides up and down along the main body 5, and the projecting length of the bit 15 from the lower surface of the plate 3 changes. Therefore, the operator can measure the protruding length of the bit 15 by holding the scale with the other free hand. At this time, as long as the operator presses the roller 13 without rolling, the base 2 does not slide without permission. When the slide position of the base 2 is determined, the cylindrical portion 4 is fixed again by the clamp 10, so that the selected cutting depth can be obtained.

As described above, according to the above embodiment, the base 2
In addition, the peripheral surface is in contact with the outer surface of the main body 5, and the roller 13 that can relatively roll on the main body 5 in the sliding direction of the main body 5 is provided so that the cutting depth can be adjusted by hand. Since the work can be easily performed while being held, and the work of measuring the projecting length of the bit 15 with a scale can be performed at the same time, the operability is excellent. This can be realized with a simple configuration in which the rollers 13 are provided, so that cost increase can be reduced. In particular, in this case, the through hole 12 that supports the roller 13 is formed in an oval shape, and the roller 13 is provided so as to be finely movable in the front-rear direction toward the main body 5 side. 5 and the base 2 can be smoothly slid via the rollers 13.

The roller may be made of rubber, and the material, size, mounting position and the like are not limited to the above-mentioned forms, as long as the base can be slid by rotating the roller. The design can be changed, for example, by forming the peripheral surface into a concave shape in accordance with the curved surface shape of the main body to secure a contact area. Further, the through-hole supporting the pin of the roller may be replaced by an oval concave portion. However, if there is no obstacle to the sliding of the base by the rollers, these through holes and concave portions do not necessarily have to be oval.

On the other hand, the roller does not need to be always exposed, and as shown in FIG.
It can also be provided at a position covered by. With this configuration, the release of the clamp 10, the rotation of the roller 13, and the fixing operation of the clamp 10 can be performed in a series of steps with the hand holding the main body 5, and the adjustment of the cutting depth can be performed more easily. . Also, since the roller 13 is hidden by the clamp 10,
It is not necessary to add a new protruding portion to the cylindrical portion 4 of the base 2, and the operability and workability of the trimmer 1 are not reduced. Further, in the above embodiment, the roller is provided in the slit formed in the base, but if the clamp of the main body does not depend on the slit, a through hole for attaching the roller may be provided in the cylindrical portion of the base.

[0012]

According to the first aspect of the present invention, the base is provided with a roller having a peripheral surface abutting against the outer surface of the main body and capable of relatively rolling on the main body in the sliding direction of the main body. Since it is provided so that it is exposed in the unlocked state, it is possible to easily adjust the cutting depth while grasping it by hand, and at the same time work such as measuring the projecting length of the bit with a scale, Excellent operability. This can be realized with a simple configuration in which rollers are provided, so that cost increase can be reduced. According to the second aspect of the invention, in addition to the effect of the first aspect, the roller is provided so as to be finely movable in the front-rear direction toward the main body, so that the pressing force to the roller can be transmitted to the main body without loss. And the base can be smoothly slid through the rollers. According to the third aspect of the present invention, in addition to the effects of the first or second aspect, in the case where the main body is fixed by a clamp that locks between both ends of a slit provided in the base, a roller is provided. Is provided in the position covered by the clamp in the slit, so that the clamp can be released, the roller can be rotated, and the clamp can be fixed in a series of steps with the hand holding the body, and the cutting depth can be adjusted. Can be done more easily. In addition, since the roller is hidden by the clamp, it is not necessary to add a new protruding portion to the base, and the operability and workability of the trimmer are not reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a trimmer.

FIG. 2 is a left side view of the trimmer.

FIG. 3 is a left side view of a base.

FIG. 4 is an explanatory diagram showing an adjustment state of a cutting depth.

FIG. 5 is a front view of a trimmer in which a position of a roller is changed.

[Explanation of symbols]

1. Trimmer, 2. Base, 3. Plate, 4.
Cylindrical part, 5 body, 6 rotating shaft, 8 slit,
11 · · · shaft support, 12 · · · hole, 13 · · roller, 14
.. Pins, 15 bits.

Claims (3)

[Claims] 1. A main body to which a bit can be attached at a lower end, and a cylindrical base in which the main body is slidably inserted and the bit can protrude from a lower surface. A trimmer capable of being fixed at a position, wherein the base has a peripheral surface abutting against an outer surface of the main body, and a roller that can relatively roll on the main body in a sliding direction of the main body, A trimmer provided so as to be exposed when the fixing is released. 2. The trimmer according to claim 1, wherein the roller is provided so as to be finely movable in the front-rear direction toward the main body. 3. The apparatus according to claim 1, wherein the fixing of the main body is performed by a clamp that locks between both ends of a slit provided in the base, wherein a roller is provided in the slit at a position covered by the clamp. Or the trimmer according to 2.