JPH0211191A - Scissors - Google Patents

Abstract

PURPOSE:To obtain scissors not to need the re-clamping of a screw by providing a fixing means to fix a cylinder body inserted to the shaft hole of the scissor body of one side so that it cannot be turned relatively to the scissor body and, simultaneously, forming a buldging part in the vicinity of a blade edge in making the lengthwise direction axis of a blade body into a center. CONSTITUTION:Into shaft holes 20 and 20 bored in two scissor bodies 1 and 2, cylinder bodies 5 and 6 are inserted, and respective cylinder bodies are pressed in the cylinder body direction of the other side. The title scissors have egg-shaped plate springs 21 and 22 as elastic members, and a square hole and a round hole are bored to the plate spring. A shaft core is composed of one bolt 7, a first nut 3 and a second nut 4, the cylinder bodies 5 and 6 are moved separately related to the direction of the bolt 7, and even when respective parts of a supporting shaft is worn and a play is generated, the cylinder bodies 5 and 6 approach by the degree, and the play is canceled. Further, since a buldging part 36 is formed on the back surface of a blade body 34 of one side, at a back side from the shaft hole 20 and, simultaneously, in the position near to the blade edge in making a lengthwise direction axis 35 of the blade body into the center, blade edges of both sides are made into contact so as to cut into each other, and even when the blade edge is worn the blade edges are made to mutually grind the blade edge of the other side, and a sharp cutting effect can be maintained for a long period.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to improvements in scissors, particularly in the support shaft of scissors, and relates to all types of scissors such as hairdressing scissors and other scissors for cutting hair.

(Prior art) Conventional scissors simply use a male thread and a female thread for the spindle, and a small gap is formed between the two scissor blades near the spindle, and the screws are loosened and tightened. The elasticity of the scissors was used to adjust the strength of the rotation of the scissors.

(Problem to be solved by the invention) Conventional scissors were as described above, so after using them for a certain period of time, the contact part of the spindle wears out and the screw tightening loosens, so new scissors are needed. I had to retighten the screws. However, re-tightening the screws requires a high level of skill to adjust the amount of tightening, which is difficult for young people and women.The present invention provides scissors that do not require re-tightening of the screws. With the goal.

(Means for Solving the Problems) The configuration of the present invention will be explained with reference to the drawings showing examples.

The scissors have two scissor blades 1 and 2 rotatably attached to a support shaft. The support shaft consists of a shaft core and two cylindrical bodies 5.6, and the shaft core consists of a bolt 7 and two nuts 3, 4.

The cylindrical bodies 5 and 6 are integrally molded of metal and consist of a dish-shaped head 8°9 and a cylindrical body 10 and 11, and have insertion holes 12 and 13 bored in the axial direction. Tapered side surfaces 14.degree. 15 are formed in the portion 8.9 so as to match the dish-shaped portions of the seed hole-shaped shaft holes 13.degree. 13 bored in the scissor blade. In addition, in order to transmit the rotation of one cylinder to the other cylinder, half of the body part 10°11 of each cylinder is divided into halves,
It has contact flanks 16,17 which abut one another. A countersunk hole 18 is formed near the exit of the insertion hole 12 of one cylindrical body 5, and a square stepped portion 19 is provided on the head 9 surface of the other cylindrical body 6.

The cylinders 5 and 6 are inserted into the shaft holes 20 and 20 formed in the two scissor blades, and the upper parts of the cylinder heads 8 and 9 are in a state of protruding beyond the surfaces of the scissors blades 1 and 2. The elastic member for pressing each cylinder toward the other cylinder is an egg-shaped leaf spring 21.
, 22. A square hole 23 and a round hole 24 are bored in the leaf spring.

The leaf springs 21 and 22 are fixed through round holes 24 with set screws 25 and 25 at a portion closer to the handle than the support shaft. One of the leaf springs 21 presses against the cylindrical body 5 at a position where the central axis of its square hole 23 is coaxial with the central axis of the insertion hole 12 of the cylindrical body. The other leaf spring 22 has its square hole 23 fitted into the square stepped portion 19 of the other cylindrical body 6, and in this state presses the cylindrical body 6.

Both cylindrical bodies 5 and 6 are inserted into the respective body parts 1 within the shaft holes 20 and 20.
The end portions of 0 and 11 face each other with a distance between them. Moreover, since the contact sides 16, 17 of both cylinders 5, 6 are in contact, only one of these cylinders cannot rotate freely.

The shaft core consists of one bolt 7, first nut 3 and second nut 4
It consists of The bolt 7 is inserted through the insertion hole 13 of the other cylindrical body 6, and the tip of the bolt 7 is inserted into the insertion hole 12 of the one cylindrical body 5.
passes through and protrudes onto the surface of the scissor blade 1, where both bolts 3,
4 and screwed together.

A spring 3 is installed between the pole 1-head 29 and the leaf spring 22.
0 intervenes. The bolt to be screwed in first is the second bolt 4, which has a protrusion 25 at the center of its back surface.

This protruding part 25 has a two-stage structure, with the part near the back of the bolt becoming a corner part 26, and the circular dish part 27 below.
are formed, and a screw hole passes through their center. This second nut 4 is screwed onto the bolt 7, and the one circular dish-shaped part 27 is accommodated in the seed hole 18 of one of the cylinders 5, and the square part 26
fits into the square hole 23 of the leaf spring 21. Therefore, the second nut 4 does not rotate relative to the leaf spring 21 and the scissor blade 1. Further, a recess 28 is provided on the upper surface of the second nut 4, and the first nut 3 is accommodated in this recess 28. This first nut 3 is attached to the bolt 7 after the second nut 4 is attached to the bolt 7, and the action of both nuts 3 and 4 prevents these nuts from loosening during use of the scissors.

Further, a raised portion 36 is formed on the back surface of one of the blades 34 at a position rearward of the shaft hole 20 and closer to the blade edge with respect to the longitudinal axis 35 of the blade. This raised portion 36 is provided integrally with the blade, and its height is extremely small.

FIG. 8 shows a cross-sectional view of the blade edge to which the present invention is used, and is obtained by slightly polishing the conventional blade edge 31 shown in FIG. 7 so that the outer surface 32 of the blade body can be seen. be. As a result, as shown in Figure 8, the blade edge 33 is now oriented slightly toward the inner surface of the blade body, and the conventional blade edge 31, which was located at the outermost edge of the blade body, has now moved back slightly from the outermost edge. It will exist in the position. For this reason, even if the blade wears down when using scissors, the blade edge protrudes toward the outermost edge, so a new blade will be attached, and the blade will not lose its sharpness for a long time.

(Operations/Effects) The present invention has the above-described configuration, and the elements that rotate integrally with the bolt 7 are the two nuts 3, 4, the leaf spring 21, and the scissor blade 1 coupled thereto. On the other hand, what rotates integrally with the scissor blade 2 is the leaf spring 22 coupled thereto, and the cylindrical body 6 in a fitted state with the spring 22. Cylindrical body 5 has bolt 7
Although it can rotate freely against the cylindrical body 6, the cylindrical body 5 contacts the contact surfaces 16 and 17 and rotates together with the cylindrical body 6, so the cylindrical body 5 is also integral with the scissor blade 2 like the cylindrical body 6. Rotate to.

That is, the cylinders 5, 6 can be moved independently with respect to the direction of the bolt 7.

Therefore, even if various parts of the spindle are worn out and looseness occurs as a result of long-term use, the cylindrical bodies 5 and 6 are brought closer to each other by that amount, so that looseness can be eliminated.

Furthermore, a raised portion 36 is formed on the back surface of one of the blades 34 at a position behind the shaft hole 20 and near the edge of the blade around the longitudinal axis 35 of the blade, as shown in FIG. The trailing edge of one blade moves away from the center line, and both blade edges touch each other so that they bite into each other, so even if the blade edges are worn out, each blade edge will not sharpen the other blade edge. Since new edges are formed one after another, the blade can maintain its sharpness for a long period of time.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of the scissor blade as seen from the back side, FIG. 2 is a cross-sectional view showing the contact state of the blade at the rear of the shaft hole, and FIG. A sectional view showing the contact state of the two blades, FIG. 4 is a front view of the vicinity of the spindle of the present invention,
Figure 5 is a perspective view of the leaf spring, Figure 6 is a perspective view of the cylindrical body, and Figure 7 is a perspective view of the leaf spring.
The figure is a perspective view of the second nut seen from the back side, Figure 8 is a cross-sectional view of the blade of the present invention near the edge, Figure 9 is a cross-sectional view of the conventional blade near the edge, and Figure 10 is the vicinity of the spindle. FIG. 1.2... Scissor body 3... First nut 4... Second nut 5, 6... Cylinder body 7... Bolt 12, 13
... Insertion hole 20 ... Shaft hole 21, 22 ... Leaf spring Figure 6 Figure 7 Special 5n Hei 2-11191 (4)

Claims (1)

[Claims] In a pair of scissors in which two scissors are rotatably mounted on a spindle, the spindle consists of a shaft core and two cylinders, the cylinder consists of a head and a body, and the scissors have a hole in the scissors body. The surface of the scissor blade is inserted into the provided shaft hole with the surface of the scissors unevenly inserted, and the insertion amount of the cylinder is regulated by the head so that the ends of both cylinders do not collide in the shaft hole, and one of the cylinders is inserted into the shaft hole. The bodies of both cylinders have contact sides in order to transmit the rotation of the cylinder to the other cylinder, and each cylinder is pressed toward the other cylinder by an elastic member. The two scissors blades are connected so as not to be separated by the shaft core inserted through the insertion hole, and the cylindrical body inserted into the shaft hole of one of the scissors blades is prevented from rotating relative to that scissors blade. The shaft core, which is fixed and inserted into the insertion hole of the cylinder body, is equipped with a fixing means to prevent it from rotating relative to the other scissor blade, and the shaft core inserted into the insertion hole of the cylinder body is equipped with a fixing means to prevent it from rotating relative to the other scissor blade. Scissors characterized by forming a raised part at the rear and near the edge of the blade centered on the longitudinal axis of the blade.