JPS629792Y2 - - Google Patents

Description

[Detailed explanation of the idea] A saw for high branches has a saw blade supported at the tip of a long handle, but supporting the saw blade in a fixed state against the handle is dangerous when carrying it. Therefore, it would be better to support this saw blade in a rotatable manner so that it can be folded against the tip of the handle, and store the saw blade in a slit formed in the abdomen of the handle when not in use. Unlike hand-held saws with short handles, providing a slit like this at the tip of a long handle to store the saw blade weakens the strength of the handle. This increases the weight of the tip and causes fatigue during work.

In order to solve this problem, the present invention has a saw blade rotatably supported at the tip of a long handle, which is rotated in a folded state when not in use, so that one side of the blade part of the saw blade is attached to the handle. It is designed to be stored in a closed state along the outer surface, and the embodiment shown in the figure will be described below.

In the figure, 1 is an elongated rod-shaped handle, and 2 is an armrest that is inserted in a slit 3 formed by dividing the tip of the handle into left and right halves, and is rotatably attached to a base shaft 4. The cross arm is formed by two parallel facing plates 2b, 2b with a back plate 2a on one side with an insertion interval for the saw blade 5, and a cross arm tip 2' that protrudes outside the slit 3. The base of the saw blade 5 is interposed between the opposing plates and supported by a shaft 6 so as to be rotatable. Reference numeral 7 denotes a long hole formed in the cross arm 2 in an arc shape with the base shaft 4 as the center, and the rotation angle of the arm is regulated by inserting a pin 8 inserted therethrough near the tip of the handle 1. However, the forming range of this elongated hole 7 is such that one end A is defined on the line A-A connecting the centers of the base shaft 4 and the shaft rod 6, while the other end B is defined by sawing against the cross arm 2. Blade 5
Rotate the blade part 5' of the saw blade to the position where it abuts the limiting part 2'' provided on the cross arm, and then insert the blade part 5' of the saw blade into the handle 1.
In other words, the rotation angle θ ₁ of the saw blade 5 with respect to the arm 2 is such that the arm 2 is rotated relative to the handle until it approaches the outer surface of the arm so as to be approximately parallel to the outer surface of the handle 1. The sum of the formation angles θ ₂ of the long holes that can be rotated to the maximum extent relative to The position B is determined to be approximately equal to the angle θ formed by B-O-B. Reference numeral 9 denotes a notch formed on the inner edge of the base of the saw blade 5 so that the pin 8 can be engaged with it. It is formed along the lines. Note that the restricting portion 2'' that restricts the rotation of the saw blade 5 relative to the arm 2 is shown using one end of the back plate 2a in the figure, but the arm 2 may be formed of a single piece. In other cases, this restriction may be formed by a separate stopper.

Since the saw for high branches of the present invention has the above-mentioned configuration, in order to store the saw blade 5 from the usage state shown in FIGS. (Fig. 4), and then rotate the armrest 2 in a direction to position the pin 8 from one end A of the elongated hole 7 to the other end B. (Fig. 5), the tip 2' of the cross arm supporting the saw blade moves to the outer side of the tip of the handle 1, and the sum of the two rotation angles θ ₁ and θ ₂ is the same as the initial use. Since it is determined to be approximately equal to the angle θ between the outer surface of the handle 1 and the forming surface of the blade portion 5' in the state, the blade portion 5' of the saw blade should be approximately parallel to the outer surface of the handle 1. On the other hand, in order to move from the stored state shown in FIG. 5 to the usage position shown in FIGS. The pin 8 is moved from one end of the elongated hole to the position A (Fig. 4), and then the saw blade 5 is rotated around the shaft 6 to move the pin 8 into the notch 9. When engaged, the saw blade is supported by the shaft 6 and pin 8 with the saw blade projecting from the tip in the extending direction of the handle 1.

In this way, according to the present invention, when in use, the saw blade is supported at the tip of the handle in the extending direction via the arm, and when not in use, the saw blade is supported on the arm, and this arm is attached to the handle. By rotating the saw blade at the required angle, the cutting edge of the saw blade can be brought close to the outer surface of one side of the handle so that it is approximately parallel to the outer surface of the handle. In addition, the slit formed in the handle is different from storing the saw blade itself as in conventional folding saws. It is possible to eliminate the disadvantages that sometimes occur when the strength of the handle is weakened due to the interposition of a cross arm, and if this cross arm is formed of two opposing plates, the base of the saw blade can be Since it is held between arms, it has the effect of further increasing the strength during use.

[Brief explanation of the drawing]

Fig. 1 is a side view of the saw of the present invention, Fig. 2 is an enlarged side view of the cutout of the same main part, Fig. 3 is a plan view of the main part, Fig. 4,
FIG. 5 is a side view showing the rotating state of the saw blade.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An elongated rod-shaped handle 1, an armrest 2 interposed within a slit 3 formed at the tip of the handle and pivotally attached by a base shaft 4; The cross arm has a saw blade 5 rotatably supported by a shaft 6 at the tip 2' projecting outside the slit, and the arm has a pin 8 penetrating near the tip of the handle. The elongated hole 7 through which it is inserted is formed in an arc shape centered on the base shaft, and one end of the long hole 7 is aligned with the line A- connecting the base shaft 4 and the shaft 6.
A, and the other end B is the rotation angle θ ₁ when the saw blade is rotated with respect to the arm until it abuts the limiting portion 2″, and the formation angle θ of the elongated hole 7. The sum of ₂ and 2 is handle 1 when in use.
The pin 8 is set at a position approximately equal to the angle θ formed by a line B-O-B parallel to the outer surface of the saw blade and the forming surface of the blade portion 5'. A saw for cutting high branches, characterized in that the notch 9 to be engaged is formed along an imaginary circle passing over one end of the elongated hole. (2) An armrest 2 which is interposed in a slit 3 formed at the tip of the handle and is pivoted by a base shaft 4.
A utility model for high branches according to claim 1, characterized in that the arm is formed by two parallel facing plates, and the base of the saw blade is interposed between the arm facing plates. saw.