JPS6024122Y2 - scissors - Google Patents

Description

[Detailed Description of the Invention] The present invention aims to provide scissors, particularly scissors suitable for cutting objects that are round and thick, such as tree branches.

In order to obtain Uobushi wood suitable for construction, pruning must be done during afforestation.

Tools such as saws, sickles, and scissors are used for this pruning, but scissors are often used because they have a good ability to tuck in cuts that close up quickly, and they do not damage the trunk. It started to get worse.

However, in conventionally used scissors, as shown in FIGS. When the two blades are pivotally connected by the shaft 5, the blades are attached so that they face on the same side, for example, the front side as shown in Fig. When the scissors 6 is not cutting something, the two blades 3 and 4 are tightly butted against each other, but when cutting, that is, pruning, the tree 7 that is the object to be processed, the two blades 3 and 4 continue to cut. As the cutting progresses, a force is applied that presses the cutting edge in the direction of the blade surface, and when pruning, one of the two blades bites into the branch and cuts are made, so in the final stage of cutting, In this case, only one blade is pressed in the direction of the blade surface, and blades 3 and 4 are not butted together, and the uncut portion at the base of the branch creates a slight difference in the cut of the sitting tree. However, there was a problem in that the pivot portion of the shaft 5 gradually loosened during use, causing so-called misalignment.

The present invention relates to scissors that solve such problems, and one example of its implementation will be described below with reference to the drawings.

The scissors 11 are especially suitable for pruning at high places, and the scissors 11 have a first blade body 12 and a second blade body 13 pivotally connected to each other by a shaft 14 so that they can move apart without sliding against each other. Also, a rod 15 extending in the opposite direction of the pivot 14 of the first blade body 12
The ends of the two L-shaped plates 16, 16' have a shaft 17 at the upper end.
The upper end of the tube 18 is fixed to the lower end of the L-shaped plate 16, 16'.

A rod 19 extending in the opposite direction of the pivot 14 of the second blade 13
is provided with a guide groove 20 extending in the length direction in the center thereof, and a shaft 21 is provided at the tips of the short arms of the two L-shaped plates 16, 16', and this shaft 21 is inserted into the guide groove 20. It is inserted through.

Each blade 22 of the first blade body 12 and the second blade body 13.
23, as shown in FIG. 5, two blade bodies 12, 13;
The first blade 12 is viewed from the front side in FIG. 3, and the second blade 12 is viewed from the back side in FIG. The blade is attached by slanting the blade surface towards the edge of the blade.

Reference numeral 24 denotes a protruding piece fixed to the side surface of the rod 15. A screw hole is provided in this protruding piece, and a screw 25 is screwed into the protruding piece. Adjust so that it is in contact with the

A coil spring 26 is provided between the rod 15 and the L-shaped plate 16, 16', and is used to keep the blades 22 and 23 apart from each other at all times by elastic force to maintain the open state.

Reference numeral 27 denotes a handle that is detachably fitted into and fixed to the tubular body 18.

Next, the function of the scissors of the present invention will be explained.

The scissors 11 is connected to the blade 22 by the elastic force of the coil spring 26.
3 are always maintained in the open state in which they are separated from each other, that is, in the state shown in FIGS. 3 and 4.

Then, lift the scissors 11 by holding the handle 27, pinch the base of the branch 28 you want to cut between the blades 22 and 23, and pull down the handle 27.

This force applies a force to the first blade 12 in the clockwise direction in FIG. 3, and the rod 15 also pivots in the clockwise direction in FIG. 3 against the elastic force of the coil spring 26.

Since the rod 15 and the L-shaped plate 16, 16' are pivotally connected at their upper ends by a shaft 17, the pivot movement is performed around this pivot 17, and the blades 22 and 23 abut against the branch 28. Therefore, the L-shaped plate 16, 16' moves to the right in FIG.

Since the shaft 21 of the L-shaped plate 16, 16' is fitted into the guide groove 20 of the rod 19, the second blade 13, which receives the force in the direction of being pushed up by the branch 28, is forced into the engagement between the rod 19 and the shaft 21. Rather, the blade 23 receives a force in the direction of pushing it down, and the blades 22 and 23 each receive a force in the direction of biting into the branch 28.

FIG. 6 shows this state.

Initially, the blade 23 of the second blade body 13 bites into the branch 28 from above, and the blade 23 of the first blade body 12 bites into the branch tip slightly from the root of the branch 28, and the blade 22 of the first blade body 12 bites into the branch from below.
bites into the root side of the branch 28 rather than the blade 23.

FIG. 6 shows this state.

Next, when the handle 27 is pulled down for pruning, the force acts on the second blade 13, and the blade 23 of this blade 13 mainly bites into the branch 28.

Furthermore, when the handle 27 is pulled down and the branch 28 is cut, the force of the branch trying to open the cut due to its own weight causes the blade 23 to move in the direction of the blade surface, that is, as shown by the arrow in FIG. As the branch is cut, it gradually receives a resistance force that presses it diagonally downward to the left in the figure, and as shown in FIG. 8, the branch 28
When the cutting progresses until the branch is struck off, the tip of the blade 23 is pushed until it hits the tip of the blade 22, so that the root portion of the branch 28 is completely cut off by the blade 23 and the blade 22.

As mentioned above, the scissors of the present invention have two blade bodies that move apart without sliding around the pivot shaft, one blade has a blade attached from the surface side, and the other blade has a blade. When the blade is attached from the back side and the two blades are put together, the slanted blade surfaces face each other and are in close contact with each other, so when cutting a thick workpiece, it is difficult to cut. Even if pressure is applied to the blade in the direction of the blade surface as the cutting progresses, the two blade bodies and blades can butt against each other in the final stage of cutting, ensuring that the workpiece is completely cut. The cut edge is extremely smooth, and the cut edge is rolled up smoothly by the growth of the tree.

In addition, since the blade is attached as described above, it is possible to cut thick materials without difficulty, the blade does not become distorted, and can be used for a long period of time. The body thickness can be made thinner, and a lightweight and inexpensive scissors can be provided.

[Brief explanation of drawings]

Figures 1 and 2 show examples of conventional scissors.
Figure 1 is a front view of the main parts, Figure 2 is a sectional view showing the state of the first blade and second blade during use, Figures 3, 4, 5, and 6. , 7 and 8 show an embodiment of the scissors of the present invention, and FIG. 3 is a front view of the pruning shears, and FIG.
The figure is a rear view of the same, and Figure 5 shows the first and second blades in use.
FIG. 6 is a cross-sectional view showing the state with the blade, and FIG. 6 is a cross-sectional view showing the state when pruning. Code, 11... Scissors, 12... First blade body, 13... Second blade body, 22... First blade body. Blade, 23...Blade of the second blade body.

Claims (1)

[Scope of utility model registration request] A first blade body with a blade attached from the front side and a second blade body with a blade blade attached from the back side are pivoted by a single axis so that the blade surfaces face each other and come into close contact without the two blades sliding against each other. and extend these two blade bodies in opposite directions of the axis,
The extended end of the first blade is pivotally connected by an L-shaped plate, and a guide groove is provided in the extended part of the second blade, and the two blades of the L-shaped plate are inserted into the guide groove. A shaft provided on an arm extending in the opposite direction is inserted, a spring is provided between the arm and the extension of the first blade, and a tube for attaching the handle is provided at the lower end of the L-shaped plate. Scissors equipped with