JP5844862B1 - Base for hand jigsaw with convex shape - Google Patents

Abstract

[PROBLEMS] To adjust the cutting angle of a hand jigsaw so far, it is necessary to fix the base at an arbitrarily set cutting angle and to cut out a certain angle from the beginning of cutting to the end of cutting. I couldn't cut it like changing the angle freely while moving forward. In addition, since there is a hinge at a position slightly higher than the base bottom surface, that is, the contact with the member to be cut, if the angle is changed by the hinge, the swing angle further increases at the contact point of the saw blade and the member to be cut, that is, the cutting point. Even if it was a movable hinge, it was impossible to change the angle while aiming at the line to cut reliably. The present invention uses a convex shape on the bottom of a base of a hand jigsaw, and a convex base designed to control the change of the cutting angle during cutting using the cutting point at which the saw blade cuts out the material as an angle fulcrum. It is. [Selection] Figure 1

Description

  The present invention relates to a base for a hand jig saw that has a convex shape on the base of the base that is the ground contact surface of the member to be cut and the hand jig saw, and can arbitrarily change the cutting angle while cutting forward.

  A hand jigsaw is a kind of electric saw, which is mainly used for cutting wooden boards, and is a widely used electric tool. It is often used for cutting a free curve or processing a detail because it can be moved by the vertical movement of a narrow blade and the direction of travel can be changed relatively freely.

In general, the base of the hand jigsaw is provided with a hinge capable of adjusting the angle, and can be set and used at an arbitrary angle, and the angle of the cut surface can be set as required.
Generally, it is structured to adjust the angle by combining the convex semi-cylindrical mounting part provided on the base side and the concave semi-cylindrical base mounting seat provided at the lower part of the hand jigsaw body. It can be used either vertically or left and right, and securely fixed with screws (see Patent Document 1).

  Since the base of the hand jigsaw has a role to prevent the material being cut from jumping up, the hand jigsaw body and the base need to be securely fixed, and the angle adjusting hinge cannot be used without being fixed.

JP-A-8-155730

The above hand jigsaws are widely used in various situations because of their small turning ability. From free machining, free hand cutting out free curves from other details that do not include other saw teeth, and along with straight hand rulers. There are many ways to use it. Further, as described above, the one having a function of cutting the cut surface at an arbitrary angle is generally used, and in that case, the base angle is adjusted by the hinge structure of the base mounting portion and tightened with a fixing screw.
However, this angle adjustment function needs to be used with the base fixed at an arbitrarily set cutting angle, and is a function for cutting a certain angle from the beginning of cutting to the end of cutting. I couldn't cut it like changing the angle.
In addition, since there is a hinge at a slightly higher position from the base bottom surface, that is, the contact with the member to be cut, if the angle is changed by the hinge, the swing width further increases at the contact point of the saw blade and the member to be cut, that is, the cutting point. Even if the movable hinge is used, it is impossible to change the cutting angle while reliably aiming at the line to be cut.

  The present invention uses a convex shape on the base bottom surface of the hand jigsaw, and has a convex shape designed so that the cutting angle can be controlled during cutting using the contact point between the saw blade and the member to be cut, that is, the cutting point as an angle fulcrum Is the base.

  According to the curved hand jigsaw base of the present invention, when it is desired to change the cutting angle while cutting forward, the cutting angle of the saw jig of the hand jig saw becomes the fulcrum of the cutting angle, so that the cutting line can be surely The cutting angle can be controlled freely while aiming.

Further, as shown in FIGS. 3 to 7, the base shape can be changed according to the application, but the same effect can be obtained in that the cutting point e becomes an angle fulcrum.

1 is an overall view of a curved base according to a first embodiment of the present invention attached to a hand saw. It is a figure which shows the attachment structure of the base and hand jigsaw of 1st Embodiment by this invention. It is the elements on larger scale which attached the pipe-shaped base by 1st Embodiment of this invention to the hand jigsaw. It is the elements on larger scale which attached the left-right asymmetric hand saw base of 2nd Embodiment of this invention to the hand jigsaw. It is the elements on larger scale which attached the left-right asymmetric hand saw base of 3rd Embodiment of this invention to the hand jigsaw. It is the elements on larger scale attached to the hand saw base hand jigsaw which has a both-sides angle and large curved surface of 4th Embodiment of this invention. It is the elements on larger scale attached to the hand saw base hand jigsaw which has a both-sides angle and a large curved surface of 5th Embodiment of this invention.

  As shown in FIG. 1, for example, when a pipe-shaped object having a constant curved surface is used as a base, a pipe shape a having a pipe diameter of about 20 mm to 40 mm is used for cutting purposes. The shape of the hand jigsaw body is slightly different depending on each hand saw. As shown in FIG. 2, the hand jigsaw body is fixed to the hand jigsaw body b, for example, by fixing with a pipe base mounting screw a-3. If necessary, the base is set up with features corresponding to each mounting seat.

The circular pipe-shaped hand jigsaw base of the first embodiment can have a different shape according to the intended use as shown in FIGS. For example, in the base shown in FIGS. 4 and 2a, one side does not fall down from the vertical angle, but the other side can freely move the line down or up. In this way, shapes corresponding to different uses on the left and right may be arranged, as in the example of the two base shapes 2a and 3a shown in FIGS.
In the shape as shown in FIGS. 6 and 4a, the material can be cut at a certain angle. Even at that time, the cutting point e becomes the fulcrum of the tilt angle of the hand jigsaw, so it is easier to aim at the cutting line.

As shown in FIGS. 7 and 5a, for example, when using a curved surface of φ40 mm or more, or when it is desired to suppress the overall height of the hand jigsaw, it is possible to move the sawtooth by attaching a base shape with a part of the curved surface. A base with a large curved surface can be mounted while securing a range.

a Hand jigsaw base a-1 Base body
a-2 Base fixing stay a-3 Base fixing screw a-4 Fixed screw hole a-5 Sawtooth slit b Hand jigsaw body b-1 Body screw hole c Sawtooth e Cutting point (cutting angle fulcrum)
2a Vertical one-side curved base 3a Angle one-side curved base 4a Double-sided angle base 5a Large curved base

Claims (3)

A base detachably attached to a hand jigsaw,
The bottom surface of the base that comes into contact with the member to be cut has a convex curved shape that allows the saw blades of the hand jigsaw to be inclined in the left-right direction with respect to the cutting progress direction, thereby enabling a progressive inclination of the cutting angle. Base for hand jigsaw. Convex song-sectional shape of the bottom surface of the base for the hand Jigsaw hand jigsaw for the base of claim 1, wherein it is asymmetrical. A hand jigsaw comprising the base according to claim 1.