JPH0441815Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to the blade portion of the shears, particularly pruning shears for cutting thick branches, etc.

[Conventional technology]

The receiving blade plate and cutting blade plate that make up the blade body of conventional pruning shears, especially the cutting blade plate, are made of a relatively thick steel plate (for example, about 5 mm for a blade with a blade length of 50 mm). There are many.

[The problem that the idea attempts to solve]

The cutting blade plate A of the blade body in conventional pruning shears has an extremely thick plate thickness D as described above, so its strength is large and it does not break or bend even if it cuts into the object to be cut. It is durable and has no problems. However, in terms of cutting quality, which is important for a knife, the thick plate thickness D of the cutting blade plate A results in a large projected area onto the workpiece, making it difficult to cut into the workpiece, making it difficult to achieve good cutting quality. Scissors with good taste are in demand.

This invention aims to solve the above problems.

[Means to solve the problem]

This invention was devised to solve the above problem, and the plate thickness d of the cutting blade plate of the receiving blade plate 1 and the cutting blade plate 2 that constitute the blade body 3 of the pruning shears is the same as that of the conventional pruning shears. The cutting blade plate A of the scissors is made considerably thinner than the plate thickness D to reduce the resistance received from the cut object when cutting into the cut object B and exhibit good cutting ability, and the plate thickness is made thinner. The reinforcement body 4 with an inverted U-shaped cross section is attached to and detached from the back part 21 of the cutting board 2 from the back part ₂₁ side of the cutting board 2 to prevent the lack of strength against the bending moment _etc. of the cutting board 2. At the same time, the base 4 ₁ of the reinforcing body 4 is rotatably engaged with the base 2 ₃ of the cutting blade plate 2 by means of a stop shaft 5, so that the cutting blade plate 2 is clamped. In addition, the reinforcing body 4 is always attached to the cutting blade plate 2.
A biasing body is provided between the reinforcing body 4 and the cutting blade plate 2 in order to bias the reinforcing body 4 in the direction in which the reinforcing body 4 deeply engages with the cutting blade plate 2, that is, in the direction of the blade portion 2 ₂ so that the engagement can be maintained. 6.

[Action and effect]

To cut an object such as a branch with pruning shears, hold the handles 7 and 7 on the blade plate between the blade plate of the blade body and the cutting blade plate while supporting the object. When the blade portion 2 ₂ of the cutting blade plate 2 is cut while gripping the object, the object to be cut is cut.

However, as mentioned above, conventional pruning shears
Since the plate thickness D of the cutting blade A is relatively thick at approximately 5 mm, it will not break or bend, but the projected area onto the workpiece becomes large, resulting in a large cutting resistance and a large resistance from the workpiece. It is difficult to make a smooth transition. In other words, the scissors do not cut well.

In this invention, the thickness d of the cutting blade plate 2 is 2 mm, which is considerably thinner than that of the conventional one, so that the cutting resistance is low, the cutting edge is good, and the object to be cut can be easily cut. By the way, if the thickness of the cutting blade plate 2 is reduced, as described above, the cutting blade plate 2 will lack strength against bending and shearing forces, and will be susceptible to bending or breakage during cutting, making it unusable. However, in this invention, since the reinforcing body 4 having an inverted U-shaped cross section is engaged with the thin cutting blade plate 2, it does not break or bend and is strong. However, if the reinforcing body 4 is fixedly provided on the cutting blade plate 2, cutting is restricted to the blade part 3, and thick objects cannot be cut. At the same time, by fixing the base 4 ₁ of the reinforcing body 4 to the base 2 ₃ of the cutting blade plate 2 so that the reinforcing body 4 can rotate around the stop shaft 5, the workpiece B can be cut. As the cutting begins and progresses,
The surface side of the cutting plate 2 of the workpiece facing the blade portion 2 ₂ contacts the tip end surface 4 ₂ of the reinforcing body 4, and the pressing force of the biasing body 6 is applied to the back portion 2 ₁ of the cutting blade plate 2. This eliminates the obstruction of the cutting blade plate 2 from entering the cut.

When the cutting is completed, the reinforcement body 4 engages with the cutting blade plate 2 again by the biasing body 6 and reinforces it because the resistance is eliminated. {Fig. 4 1, 2, 3} In this way, the thin cutting blade plate 2 with the plate thickness d can be used to cut the workpiece B.
When cutting into the inside of the workpiece B, the part that is exposed to the outside of the workpiece B without being bent or bent because it is held between the front and back sides by the cuts C and C of the workpiece B is reinforced by the reinforcing body 4. Since it is reinforced, the cutting blade plate 2 can be made strong without decreasing its strength as a whole.

Not only does the sharpness improve significantly, making cutting easier even for people with weak grip strength, but it also makes it possible to cut thick branches and other objects that could not be cut with conventional pruning shears. It can be said that the limit has been expanded.

〔Example〕

An embodiment of this invention will be explained based on the attached drawings. Fig. 1 is a diagram showing the pruning shears of the invention, Fig. 2 is a sectional view of the blade body of the pruning shears of the invention, and Fig. 3 is a diagram showing the pruning shears of the invention. FIG. 4 is a sectional view of the blade body of a conventional pruning shears, and is a diagram illustrating the state of cutting an object with the pruning shears of the present invention.

Reference numeral 3 designates a blade body formed by cross-superposing a cutting blade plate with a thickness of 2 mm on a receiving blade plate 1 with a thickness of 5 mm, and fixing the blade plate with a support shaft 8.

The shape and thickness of the receiving blade plate 1 and the cutting blade plate 2 are not limited to those in the embodiments, and in particular, the thickness of the cutting blade plate 2 may be thin in relation to the object B to be cut. It may be thinner or thicker, as long as it is thinner than the cutting blade plate 2 of conventional pruning shears for the same purpose.

Reference numeral 4 denotes a reinforcing body for the cutting blade plate 2 which is made by bending a mild steel plate to form _an inverted U-shaped cross section. The reinforcing body 4 is fitted so that the blade plate 2 does not break or bend during cutting work, and the reinforcing body 4 is loosely fitted across the cutting blade plate 2 so that its base 4 ₁ is connected to the base 2 ₃ of the cutting blade plate 2. The reinforcing body 4 is locked by a stop shaft 5 to
is rotatable relative to the cutting blade plate 2. In addition, the engagement of the reinforcing body 4 with the cutting blade plate 2 is such that the front end surface 4 ₂ of the reinforcing body 4 reaches the edge of the blade part 2 ₂ of the cutting blade plate 2, and the initial contact of the blade part 2 ₂ with the object B to be cut is made. It is desirable to reinforce the cutting blade plate 2 to the extent that a cutting allowance is left.

Reference numeral 6 denotes a biasing body for pressing the reinforcing body 4 against the cutting blade plate 2. In the embodiment, it is composed of a leaf spring, and one end is fixed to the reinforcing body 4, and the opposite end is fixed to the reinforcing body 4. The biasing body 6 has a plate spring in sliding contact with the back part ₂₁ of the cutting blade plate 2 so as to have an elastic force. The starting and ending ends of the reinforcing body 4 may be engaged with the cutting blade plate 2 so that a spring urges the reinforcing body 4 toward the blade portion ₂ of the cutting blade plate 2. In short, the reinforcing body 4
The leaf spring 6 may have one end fixed to the reinforcing body ₄ and the opposite end fixed to the cutting blade plate 2. back 2
₁ , but in addition to the above, one end of the leaf spring is fixed to the cutting blade plate 2, and the other end of the leaf spring on the opposite side is attached to the reinforcing body 4 so that the leaf spring has elastic force. It may be slid on the back, in short, the biasing body 6 is the reinforcing body 4.
The present invention is not limited to the embodiments, as long as the reinforcing body 4 can be biased in the two directions of the blade portion ₂ of the cutting blade plate 2 and can prevent the reinforcing body 4 from floating up from the cutting blade plate 2 by itself.

Reference numeral 7 designates handles provided on the cutting blade plate 2 and the receiving blade plate 1, respectively. Although the present invention is a pruning shears, it goes without saying that the function and effect will remain the same even if it is applied to other shears.

[Brief explanation of drawings]

The drawing shows an example of the proposed pruning shears.
The figure is a front view, Figure 2 is a sectional view of the blade body of the proposed pruning shears, Figure 3 is a sectional view of the blade body of a conventional pruning shears, and Figure 4 is a cut made by the blade body of the proposed pruning shears. These diagrams explain how to cut an object. 1 in Figure 4 shows the state at the beginning of cutting, and 2 in Figure 4 shows the state in which the cutting blade plate cuts into the object to be cut and the tip surface of the reinforcing body is in the position of the object to be cut. Figure 3 in Figure 4 shows the state in which the cutting blade is in contact with the surface of the workpiece, and even if the cutting progresses further and the cutting blade plate cuts deep into the workpiece, the reinforcing body remains outside the workpiece and the cutter plate remains in contact with the workpiece. It is a figure explaining that entry is not obstructed. 1...Blade plate, 2...Cutting blade plate, 2 ₁ ...Back part,
2 ₂ ...Blade part, 2 ₃ ...Base part, 3 ...Blade body part, 4...
... Reinforcement body, 4 ₁ ... Base, 4 ₂ ... Tip surface, 5 ...
Stop shaft, 6... biasing body, d, D... plate thickness, A... cutting blade plate, B... object to be cut, C... cut, 7... handle,
8...Spindle.

Claims (1)

[Scope of utility model registration request] In the scissors having a blade body part 3 consisting of a receiving blade plate 1 and a cutting blade plate 2, the thickness d of the cutting blade plate 2 is relatively thinner than the plate thickness D of the cutting blade plate A of conventional pruning shears. , the cutting blade plate 2 is connected to the cutting blade plate 2 from its back 2 ₁ side.
A reinforcing body 4 with an inverted U-shaped cross section is attached to the cutting blade plate 2 to cover the
At the same time, the base 4 ₁ of the reinforcing body 4 is rotatably engaged with the base 2 ₃ of the cutting blade plate 2 by means of a stop shaft 5, and the cutting blade 2 and The pruning shears are characterized in that a biasing body 6 is provided between the reinforcing body 4 to bias the reinforcing body 4 in a direction in which the reinforcing body 4 is deeply engaged with the cutting blade plate 2.