JPH0432925Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to pruning shears used for trimming work such as trimming trees and shrubbery.

[Prior art] Conventional pruning shears are made by dividing the tip of the wooden handle into two parts in the longitudinal direction of the handle, holding the core of the shears between the clamping bodies, and inserting the core into the clamping body using a mekugi. In addition, the handle is made of a metal pipe, and reinforcing bodies are provided on each clamping surface of the gripping body of the handle, and the core of the scissors is attached to the handle through this reinforcing body. Some have been installed.

[Problem that the invention attempts to solve]

As mentioned above, in the case of conventional pruning shears with a wooden handle, the core of the shears is held between the clamping bodies that are provided by dividing the tip of the scissors into two in the longitudinal direction of the handle. The base portion of the clamping body is fragile, and if it is used forcefully, such as when cutting thick branches or the like during pruning work, the base portion of the clamping body often breaks. For this reason, oak wood, which is relatively strong, is mainly used, but the breakage rate is still high, and the specific gravity is high, resulting in extremely high worker fatigue. In addition, there are metal pipes made of steel and light metals such as aluminum alloy, and these are all made by crushing the core support part and flattening it, then pushing it into the core of the scissor body. Because they are fixed with mekugi, steel ones are stronger than wooden handles, but they are significantly heavier, and the handle does not bend during use, making it difficult for the blade to hold the object to be cut. The reaction from the machine is directly transmitted to the hands, causing significant hand fatigue and making it difficult for workers to use the machine for long periods of time. Although light metal handles are lighter than wooden handles, they are not flexible and do not have enough strength to withstand bending, making them unsuitable for cutting tree branches and can only be used for mowing soft grass such as lawns. be.

Furthermore, in the case where a reinforcing body is provided on the gripping surface of the scissors, the part that contacts the core of the scissors is well reinforced against wear, but the strength at the boundary between the gripper and the body of the handle is not sufficient. Breakage often occurs from the bottom of the clamping body, and this cannot be said to have fundamentally solved the problem of clamping body breakage.

The purpose of this invention is to solve the above-mentioned problems and provide a pair of pruning shears whose gripping body is resistant to breakage.

[Means for solving problems]

In order to achieve the above object, this invention has a pair of clamping bodies 4 ₁ and 4 ₂ that face each other at the core support part 4 of the handle body 3, and a clamping surface 4 ₁ ′ and 4 ₂ ′ that is reinforced with a reinforcing body 5 . In the device that holds the core 2 of the scissors body 1 between the bodies 4 ₁ and 4 ₂ , the clamp body 4 1 is attached to the bottom portion 4 ₄ of the clamp bodies 4 ₁ and 4 ₂ at the core support portion 4 of the handle ₃ . A recess 4 ₃ is provided in the handle 3 from the bottom 4 ₄ of the scissors body 1 toward the tail of the handle 3 to engage the protrusion _{2 1} at the tip of the tail of the core 2 of the scissors body 1. A reinforcing portion 5 1 is provided at the core support portion 4 of the handle 3 to reinforce the clamping surfaces 4 _{1 ′} and 4 ₂ ′ of the clamping bodies 4 ₁ and 4 ₂ and the inner surface 4 ₃ ′ of the recess _{4 3 that} follows them. A reinforcing body 5 having a reinforcing part 5 ₃ at the tip of the tail of 5 ₂ and 5 2 is provided in the core support part 4 portion to form a reinforcing part 5 ₃ .
is inside the recess ₄₃ and reinforces its inner surface ₄₃ ', and the reinforcing parts ₅₁ and ₅₂ are the respective clamping surfaces _41' and ₄ of the clamping bodies ₄₁ and 42.
₂ ', the clamping surfaces ₄₁ and ₄₂ are reinforced respectively, and the core 2 of the scissors body 1, which has a protrusion ₂₁ at the tip of the tail of the core 2, is attached to the core support part 4 of the handle 3. , the protrusion 2 ₁ is positioned in the recess 4 ₂ reinforced by the reinforcing portions 5 ₃ , and the core 2 is inserted between the clamping bodies 4 ₁ and 4 ₂ reinforced by the reinforcing portions 5 ₁ and 5 ₂ . It is a localized image.

[Effect]

This idea is based on the idea that, as mentioned above, the core support part that supports the core of the scissors in the conventional handle is strong, but the part where it separates from the core support part and the body is extremely strong. Because it is low, if you force it a little, it would break, so in the core support part 4 _of the handle body 3, the bottom part 4 4 of the clamping bodies 4 ₁ and 4 ₂ that make up this part
A recess 4 ₃ is provided inward toward the inside of the handle.
The clamping surfaces 4 _{1 ′} and 4 _{2 ′} of the clamping bodies 4 ₁ and 4 ₂ and the recess 4 ₃
Reinforcement parts 5 ₁ and 5 ₂ integrally formed on the inner surface 4 ₃ ′ of
and 5 ₃ , and has a gripping portion 4 and a recess 4 ₃ .
₁ , the boundary between the bottom part ₄₄ and the body part ₃₁ of the pair of clamping bodies 41 and ₄₂ facing each other, which constitute the core support part ₄ , can be strengthened. It is reinforced by the reinforcing body ₅₃ and becomes strong, so that it will not break even if it receives a large load from the protrusion ₂₁ of the core 2.

In addition, the reinforcing body 5 can prevent the core 2 and the protrusion ₂₁ from coming into direct contact with the wooden handle 3, and prevent the core 2 and the like from abrading the handle 3 due to direct contact. According to this invention, when the core 2 is engaged with and fixed to the core support part 4 of the handle 3, the protrusion ₂₁ at the tip of the tail of the core 2 fits into the body of the handle 3. It reduces the load on the boundary between the core support part 4 and the body part ₃₁ of the handle body 3,
Unlike the conventional method, in which the core is fixed to the core support part with two mekugis and the load is received by the mekugis, the number of mekugis can be reduced to one, making it easier to prevent the core 2 from slipping out. Things will happen with the help of a book.

Reducing the number of nails in the core support part 4 means that if the core support part 4 is provided with a large number of nail holes, the strength of the core support part 4 will be reduced and cracks will be created in the core support part 4. Therefore, it is desirable that the number of mekugi be small, and in the present invention, the core 2 can be fixed to the core support portion 4 with one muzzle 7 and one mekugi 6. By reducing the number of mekugi, it is possible to reduce damage to the core support when driving the mekugi into the core support of the handle.

〔Example〕

An embodiment of this invention will be described based on the attached drawings.

1 is a steel scissors body, 2 is a core of the scissors body 1, 2 ₁ is a protrusion provided at the tip of the tail of the core 2, and 3 is a handle made of magnolia wood with a length of 50 cm and a diameter. The pattern is 2.5 cm. 4 is a core support part of the handle body 3, and the core support part 4 is sawed from the tip surface of the handle body 3 in the longitudinal direction of the handle body 3 with a cutting blade such as a saw to a length of 7.
Centimeter-sized scissors 4 ₁ and 4 ₂ are provided with an interval of 6 mm, and 4 ₁ ′ and 4 ₂ ′ are the clamping surfaces where the cores of the scissors 1 of the scissors 4 ₁ and 4 ₂ touch, 4
₃ is a recess with a diameter of 8 mm and a depth of 2 cm made by drilling a hole from the bottom 4 ₄ of the gripping members 4 ₁ and 4 ₂ toward the inside of the handle 3 with a drill or the like, and 4 ₃ is the inner surface of the recess;
5 has an outer diameter of 8 mm, an inner diameter of 6 mm,
This is a reinforcing body in which 2 cm of the lower part of a 9 cm long metal tube is left as a reinforcing part ₅₃ , and the part above this is divided into two parts with a width of 6 mm to form reinforcing parts ₅₁ and ₅₂ . In this reinforcing body 5, a cylindrical reinforcing part ₅₃ is fitted into a recess 43 at the center of the core support part 4 of the handle body 1, and the reinforcing part ₅₁ and ₅₂ is made by dividing the cylindrical body _into two parts. are installed so as to be properly positioned on the clamping surfaces 4 ₁ ′ and 4 ₂ ′ of the clamping bodies 4 ₁ and 4 ₂ , respectively, and the boundary between the core support portion 4 and the body portion 3 ₁ below it is strengthened.

Following the blade body with a blade length of 15 cm, there is a core 2 with a length of 5 cm and a width of 2.5 cm, and at the tip of the tail of the core 2 there is a core 2 with a length of 2 cm and a width of 6 mm. The core ₂ of the scissor body 1 provided with the protrusion 2 1 is engaged with the core support portion 4 , so that the core 2 is placed between the scissors 4 ₁ and 4 ₂ , and the protrusion 2 ₁ is inserted into the cylinder of the recess 4 ₃ . A mekugi 6 is driven into the core supporting portion ₄ to fix the core 2 to the clamping members 4 ₁ and 4 ₂ , and a metal muzzle 7 is attached to the core. The scissors body 1 is fitted into the tip of the support part 4 and is strongly locked to the handle body 3.

The blades used in the pruning shears of this invention may be other than those in the examples, for example, pruning type blades; in short, the blades used in the pruning shears of this invention are limited to those in the examples as long as they can be used to cut objects. The handle 3 does not have to be made of magnolia wood, as long as it is light and strong, and it is perfect as long as it has a beautiful texture.

〔effect〕

As mentioned above, this invention improves the support part of the core, which is the most easily broken part of the handle of conventional pruning shears, to make it stronger and less likely to break. By reinforcing the inside of the body part ₃₁ with the reinforcing body 5 made up of the reinforcing parts ₅₁ , ₅₂ , and ₅₃ , the boundary between the bottom part 44 of the core support part ₄ and the body part ₃₁ becomes strong. The breakage accident has been resolved, and materials that were traditionally difficult to use as handles due to lack of strength, such as magnolia wood, can now be used.The traditional handle material was oak, and the handle weighs only 650 grams. What used to be quite heavy and put a strain on workers' hands, is now only 350 grams, which is about half the weight of magnolia wood of the same size, and it is also durable, making it easy to use scissors. In addition, magnolia wood has a beautiful surface and has an aesthetic effect that improves the aesthetic appearance of the design.

In addition, with this invention, the weak parts have been strengthened, so a handle that is thinner and lighter than the traditional oak handle can be used, making it possible to increase the length of the handle. It becomes possible to mow in areas where it is impossible to mow.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention. Figure 1 is a front view with the part of the handle where the core engages cut away, Figure 2 is a front view of the scissor body, and Figure 3 is the core of the handle. Fig. 4 is an enlarged view of the supporting part cut away in the longitudinal direction, Fig. 4 is an enlarged view of the core support part of the handle body cut away in the transverse direction, Fig. 5 is an enlarged perspective view of the reinforcing body, and Fig. 6 is a cross-sectional view taken along the - line. , 7th
The figure is a cross-sectional view taken along the - line, Figure 8 is a side view of the handle as seen from the tip side, Figure 9 is a cross-sectional view taken along the - line, and Figure 10 is a vertical cutaway of the core support portion of a conventional handle. This is a diagram. 1... Scissor body, 2... Core, 2 ₁ ... Protrusion, 3...
...Handle body, 3 ₁ ...Body part, 4... Core support part, 4 ₁ ,
4 ₂ ... holding part, 4 ₁ ′, 4 ₂ ′ ... holding surface, 4 ₃ ...
Recess, 4 ₃ ′...Inner surface, 5... Reinforcement body, 5 ₁ , 5 ₂ ,
5 ₃ ... Reinforcement part.

Claims (1)

[Scope of utility model registration request] A pair of brackets 4 facing each other at the core support portion 4 of the handle body 3
In the device for holding the core ₂ of the scissors body ₁ between the clamping bodies 4 _{1 and 4 2 whose clamping surfaces 4 1 ′} and 4 ₂ ′ of the scissors 1 and 4 ₂ are reinforced with a reinforcing body 5, the core 2 of the scissors body 1 is At the core support part 4, the bottom part 4 of the clamping bodies 4 ₁ and 4 ₂ is attached to the bottom part ₄ of the clamping bodies 4 ₁ and 4 ₂ .
A recess ₄ 3 is provided in the handle 3 from 4 toward the tail of the handle 3 to engage the protrusion _{2 1} at the tip of the tail of the core 2 of the scissors body 1. The respective clamping surfaces 4 _{1 ′} and 4 of the clamping bodies 4 ₁ and 4 ₂ at the child support part 4 part
₂ ' and the inner surface ₄₃ ' of the recess ₄₃ following this, a reinforcing body 5 having a reinforcing part ₅₃ at the tip of the tail of the reinforcing parts ₅₁ and ₅₂ is provided in the core support part 4 for reinforcement. The portion ₅₃ is located within the recess ₄₃ and reinforces its inner surface ₄₃ ', and the reinforcing portions ₅₁ and ₅₂ are located on the clamping surfaces _41' and _42' of the clamping bodies ₄₁ and ₄₂ , respectively. The clamping surfaces 4 ₁ ′ and 4 ₂ ′ are reinforced, and the core 2 of the scissors body 1 having the protrusion 2 ₁ at the tip of the tail of the core 2 is attached to the handle 3 .
The protrusion 2 ₁ engages with the core supporting portion 4 and is positioned in the recess 4 ₃ reinforced by the reinforcing portions 5 ₃ , and the core 2 engages with the reinforcing portions 5 ₁ and 5 .
The pruning shears are fixed to the handle body ₃ in a fixed position between the clamping bodies 4 ₁ and 4 ₂ which are reinforced with 2 and 4 2 .