JP2011224747A - Stopper for hand-held tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stopper applicable to an angled drill to solve the problem that when drilling work is performed to make a hole of a given depth using an electric drill with a stopper attached thereto, a conventional stopper being a single long bar tool cannot be applied directly to an angled drill for drilling work in a narrow space.SOLUTION: A flexible bar constructed by connecting together a number of joint pieces 10a is used as a stopper 10, the joint pieces 10a having receiving portions 10b with hemispherical recessions and spherical connecting portions 10c fitted into the receiving portions 10b. This stopper 10 can be bent at an any given position, and, therefore, can be applied to an angled drill 1 without impairing its function.

Description

  The present invention relates to a stopper provided in a hand-held tool such as an electric drill for drilling, which is called an angle drill, for example.

  For example, an electric drill for drilling can be drilled by a user pressing a drill bit (tip tool) that grips and rotates the handle portion against the drilled part. This electric drill is provided with a stopper for the convenience of drilling at a certain depth. Conventionally, as disclosed in, for example, the following patent document, this stopper mainly consists of a long bar supported so as to be adjustable along the tool body, and the tip of this stopper is located on the side of the drill bit. The drill bit is abutted against the drilling material as the drilling process proceeds, so that the entrance dimension (hole depth) of the drill bit with respect to the drilling material can be regulated to facilitate the drilling process of a certain depth. .

Japanese Utility Model Publication No. 47-19836

However, the conventional stopper is equipped only on models (straight type) in which the spindle with the drill bit attached is coaxial or parallel to the motor axis (machine length direction) of the electric motor. In addition to this straight type, an electric drill of an angle type in which the spindle is orthogonal to the motor shaft is provided. This angle type electric drill (angle drill) is used when a normal straight type electric drill cannot be used because the space in the drilling axis direction (bit axis direction) is narrow.
For this reason, as for the angle type electric drill, since the stopper for the straight type electric drill cannot be applied as it is, an actual type provided with a stopper for regulating the drilling depth has not been provided.
Therefore, an object of the present invention is to provide a stopper that can be applied to an angle-type hand-held tool.

For this reason, the present invention is a stopper having the structure described in each claim.
According to the stopper of claim 1, since it can be bent at an arbitrary portion in the longitudinal direction and is held in a bent state, for example, for an angle type electric drill, the stopper is provided along the tool body and the tip tool. It can be equipped in a bent state in an L shape (right angle). Since the stopper can be installed in a bent state in an L shape, the stopper does not get in the way even in a narrow space, so that it can be used in a narrow space or the like without impairing the features of the angle drill.
According to the stopper of the second aspect, each joint piece is a resin molded product, and a flexible bar that can be positioned and held at an arbitrary position (bent state) without returning like a metal hose can be used. Therefore, it can be equipped as a lightweight and inexpensive stopper. Such a flexible bar is used as a coolant nozzle of a machine tool, for example.
According to the stopper of the third aspect, the angle drill can be used by being bent into an L shape along the tip tool from the tool body of the angle drill, without impairing the features of the angle drill (drilling in a narrow space). By making the stopper function, drilling with a certain depth can be performed quickly and accurately.
According to the stopper of claim 4, the position of the grip portion detachably mounted on the tool body can be adjusted by adjusting the position (working depth), and conversely, the grip portion can be fixed to an arbitrary position. Since it can fix, it can equip at a lower cost compared with the case where the fixture of the said stopper is provided separately.

It is a right view of the angle drill provided with the stopper which concerns on embodiment of this invention. It is (II) arrow directional view of FIG. 1, Comprising: It is a top view of the angle drill which concerns on this embodiment.

Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an angle drill 1 having a stopper 10 according to the present embodiment. This angle drill 1 is characterized in that it is provided with a stopper 10 for regulating the drilling depth, and the angle drill 1 itself is the same as the conventional configuration and does not require any particular change. explain. The angle drill 1 includes a tool main body 2 in which an electric motor 4 is housed. A gear head portion 3 having two bevel gears (bevel gears) meshed with each other is provided at the front portion of the tool body 2.
A drill bit B as a tip tool is mounted in a state of protruding downward from the lower surface of the gear head portion 3. The drill bit B is mounted coaxially with the spindle by a three-claw chuck 7 provided on the lower surface of the gear head portion 3. The rotation output of the electric motor 4 is converted to the rotation output around the rotation axis J1 orthogonal to the rotation axis J0 through the gear head portion 3. The spindle and the drill bit B rotate around the rotation axis J1.
A switch lever 5 that is turned on and off by the user is provided on the lower surface of the tool body 2. The user can pull the switch lever 5 with his / her hand holding the rear side of the tool body 2 as the handle portion 2a. When the switch lever 5 is pulled, the electric motor 4 is activated and the drill bit B rotates. The user holds the handle portion 2a with one hand and applies the other hand to, for example, the gear head portion 3 and presses the angle drill 1 in the drilling direction (lower side in FIG. 1), whereby the drill bit B Can be pressed against the punching material W to perform drilling.
On the left side portion of the gear head portion 3, a grip portion 6 that is held by the user with the other hand is provided. As described above, instead of pressing the gear head part 3 with the other hand, the grip 6 can be held with the other hand and the angle drill 1 can be pressed against the drilling material W side. The grip portion 6 can be attached in a state where the screw shaft portion 6a is tightened into the screw hole 3a provided on the right side portion of the gear head portion 3 and protrudes to the side. If the screw shaft portion 6a is loosened, the grip portion 6 can be easily removed. A screw hole 3 a for attaching the grip portion 6 is also provided on the left side portion of the gear head portion 3. The grip portion 6 can be attached to either the left or right side.

The stopper 10 has a flexible (multi-joint) bar shape that can be bent at a plurality of arbitrary positions in the longitudinal direction, and has a configuration that is held in a bent state at an arbitrary position. The stopper 10 of this embodiment has a configuration in which a large number of joint pieces 10a to 10a are coupled in series. Each joint piece 10a is a synthetic resin molded part having a receiving portion 10b at one end and a coupling portion 10c at the other end. The receiving portion 10b is provided with a hemispherical concave portion. The coupling portion 10c has a spherical shape that is fitted into the receiving portion 10b. The stopper 10 can be bent in an arbitrary direction at an arbitrary portion by tilting (rotating) the connecting portion 10c at an arbitrary portion in an arbitrary direction with respect to the receiving portion 10b into which the connecting portion 10c is fitted. Each coupling portion 10c is fitted and held with respect to the receiving portion 10b using appropriate elasticity of the synthetic resin. Further, the rotation position is held by the appropriate elasticity of the receiving portion 10b and the coupling portion 10c, and therefore the bent state of the stopper 10 is held.
A spherical-shaped tip member 10d that does not have the receiving portion 10b is fitted into the receiving portion 10b of the adjacent joint piece 10a at the distal end portion of the stopper 10, and only the receiving portion that does not have the coupling portion 10c at the rear end portion. The rear end member 10e is coupled to the coupling portion 10c of the adjacent joint piece 10a. The tip member 10d is abutted against the perforating material W.

The stopper 10 is attached using the attachment structure of the grip part 6. The stopper 10 is supported on the side portion of the gear head portion 3 via the bracket 11. The bracket 11 includes a base 11a having a rectangular flat plate shape and a holder 11b having a semicircular recess 11c. The holder 11b is coupled to the base 11a so that it can be opened and closed by hooking a locking claw 11d provided at the front end of the holder 11b into a locking hole 11e provided at the front of the base 11a.
The base 11a and the holder 11b are provided with insertion holes 11f and 11g that are coaxial with each other in a closed state. The bracket 11 can be fixed to the side of the gear head 3 by inserting the screw shaft portion 6a of the grip portion 6 into the insertion holes 11f and 11g and tightening into the screw hole 3a. be able to.
By tightening the screw shaft portion 6a of the grip portion 6 with the stopper 10 inserted into the recess 11c, the stopper 10 is sandwiched and fixed between the recess 11c and the base 11a. Since the recess 11c of the bracket 11 is appropriately set in the front-rear direction with respect to the rotation axis J1 of the drill bit B, the attached stopper 10 is held in a state extending in parallel along the left side of the drill bit B. Is done.
If the screw shaft portion 6a of the grip portion 6 is loosened, the pinching between the concave portion 11c and the base 11a is loosened, and the stopper 10 can be moved in the longitudinal direction, or can be extracted from the concave portion 11c. By moving the stopper 10 in the longitudinal direction and adjusting the position of the tip 10a with respect to the drill bit B, the drilling depth of the drill bit B with respect to the drilling material W can be adjusted.

The stopper 10 configured as described above is long but can be bent at an arbitrary position, and is held in this bent state. Therefore, the stopper 10 is bent into an L shape as shown in FIG. It can be located along bit B. As shown in the drawing, the stopper 10 is bent into an L shape, and the upper half of the stopper 10 is located along the tool body 2 and does not extend upward. Therefore, the angle drill 1 provided with the stopper 10 is moved up and down. It can be used in a space S narrow in the direction.
Various modifications can be made to the embodiment described above. For example, although the angle drill 1 is illustrated as a hand-held tool, it goes without saying that the illustrated stopper 10 can be applied to a straight type electric drill. In addition to a normal electric drill, it can be applied to various types of hand-held tools such as impact drivers, vibration drills, hammer drills and the like.

B ... Drill bit (tip tool)
W ... Drilling material S ... Narrow space J0 ... Electric motor rotation axis J1 ... Tip tool rotation axis 1 ... Hand-held tool (angle drill)
DESCRIPTION OF SYMBOLS 2 ... Tool body 2a ... Handle part 3 ... Gear head part, 3a ... Screw hole 4 ... Electric motor 5 ... Switch lever 6 ... Grip part, 6a ... Screw shaft part 10 ... Stopper 10a ... Joint piece, 10b ... Receiving part, 10c ... coupling part, 10d ... tip member 10e ... rear end member 11 ... bracket 11a ... base, 11b ... holder, 11c ... recess, 11d ... locking claw part, 11e ... locking holes 11f and 11g ... insertion holes

Claims (4)

In a hand-held tool that presses the tip tool against the workpiece and performs machining, the tip is abutted against the workpiece with the tip positioned on the side of the tip tool and the machining depth of the tip tool with respect to the workpiece is regulated. A stopper that
A stopper configured to be long and changeable in the longitudinal direction, bendable at a plurality of portions in the longitudinal direction, and held in the folded state. The stopper according to claim 1, wherein a plurality of joint pieces each having a hemispherical coupling recess at one end and a spherical coupling projection that is tiltably coupled to the coupling recess at the other end are coupled. 3. The stopper according to claim 1, wherein the hand-held tool includes an electric motor as a drive source in a tool body, and the tip tool is mounted on a spindle orthogonal to a motor axis of the electric motor. A stopper that is an angle type tool and is bent along the tool body and the tip tool. The stopper according to any one of claims 1 to 3, wherein the hand-held tool includes a handle portion gripped by a user with one hand and a grip portion gripped with the other hand, the grip portion being A stopper detachably attached to the tool body and attached to the tool body so that the position thereof can be adjusted using an attachment structure of the grip to the tool body.

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