JPH0118139Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Purpose of the invention] (Field of industrial application) This invention is a scissors that has a joint part that can apply the advantageous pulling principle in order to improve the cutting quality of the scissors. This invention relates to a shearing scissor that can perform a shearing action by engaging a connecting pin and a guide pin adjacent thereto with guide means provided on one main body.

(Prior art) When sharpening the cutting edge angle to improve the cutting quality of scissors that have been fixedly connected at the fulcrum, it has been difficult to avoid the galling phenomenon that occurs at the contact point between the static blade and the moving blade. It was hot. For this reason, various scissors that apply the cutting principle have been devised, but the guide means provided at the joint between the static blade and the moving blade makes the joint fixation weak, and problems remain in the cutting action.

(Problems to be solved by the invention) This invention is a pull-cutting scissor having a compact structure that can solve the above-mentioned problems, and has a guide in which a joint pin provided at the fulcrum part engages a guide pin provided close to the joint pin. The purpose is to obtain a rotational cutting action through means.

[Structure of the idea]

(Means for solving the problem) In view of the above, this invention forms the movable blade tip body and static blade tip body forming the movable blade and static blade of the scissors, and the movable blade body and the static blade body on the handle side as separate bodies. At the fulcrum joint between the two, an engagement groove for engaging the movable blade tip body and the static blade tip body is recessed on the joint surface side, and the proximal ends of the movable blade tip body and the static blade tip body are aligned in the direction of the cutting edge. The hole wall of the guide elongated hole is formed at the proximal end of the movable blade tip body and has a guide elongated hole in the direction of the cutting edge that passes through a connecting pin provided at the fulcrum of the movable blade body. A guide groove is opened perpendicularly to the engagement groove wall on the side opposite to the cutting edge side of the moving blade. On the other hand, the proximal end of the stationary blade tip body, through which the connecting pin which pivotally connects the stationary blade body at the fulcrum, passes through, is attached to the stationary blade body at the retracted position of the stationary blade tip body, where the rear end abuts the rear end of the locking groove. After installing screws for integration, move the guide pin in an angular direction equivalent to 1/2 of the cutting edge opening with respect to a line that passes through the center of the joint pin hole at the base end and is perpendicular to the side surface of the engagement groove. Protruding from the engagement groove side of the blade body, and engaged with the guide groove, the movable blade tip body slides via the guide pin as the movable blade body rotates about the joint pin as a fulcrum. Guide the moving blade to perform the cutting action.

(Function) To explain the function of this device, the blade tip is slidably inserted into the engagement groove formed on the joint surface side of the main body at the fulcrum part of the moving blade main body by the joining pin provided at the fulcrum of the stationary blade main body. Pass through the guide hole of the movable blade tip body along the direction and connect it to the fulcrum of the movable blade body, and by rotating the main body around the joint pin by operating the handle, the joint pin will be attached to the joint surface side of the static blade body. A guide groove in which a separate guide pin provided as a fulcrum is engaged is formed perpendicularly to the hole wall of the guide elongated hole of the moving blade tip body, communicating with the engagement groove wall, and the guide groove is connected along this. While pushing the wall, the proximal end of the movable blade tip body fitted into the movable blade body can be slid in the direction of the blade edge, so that the movable blade body can be moved by the opening/closing movement of the handle of the movable blade body. A cutting action can be performed by moving the cutting edge body forward and backward.

(Example) An example of this invention will be described below based on the drawings.

Figure 1 shows the stationary blade body 13 of the Hikikiri scissors 1 of this invention.
Figure A shows the closed state of the movable blade and static blade with the handle 2 of the movable blade body 4 and the handle 3 of the movable blade main body 4 closed.
The released state of the movable blade and the stationary blade, in which the opening degree of the cutting edge is θ when the handle 3 is released, is shown in FIG. Second
Figure A shows a guide elongated hole 8 provided in the base end 7 of the movable blade tip body 6 that is fitted into the engagement groove 5 provided on the joint surface side of the movable blade body 4 of the scissors 1 and can slide in the direction of the blade tip. When the connecting pin 9 is inserted into the opening, the cutting edge becomes open as shown in FIG. shows. A guide groove 1 that communicates with the engagement groove wall on the side opposite to the cutting edge side of the movable blade at right angles to the hole wall 10 of the guide slot 8.
1 is opened at the base end 7 of the movable blade tip body 6, and engages a guide pin 12 protruding from the base end 16 of the static blade tip body 15, and rotates around the joint pin 9 of the movable blade body 4 as a fulcrum. While moving within the guide groove 11 by the motion, the groove wall is pushed forward or backward, and the movable blade tip body 6 is slid in the direction of the blade edge, and moved to a protruding or retreating position from the movable blade body 4. FIG. 2B shows the proximal end 16 of the stationary blade tip 15 being engaged with the engagement groove 14 provided on the joint surface side of the stationary blade body 13 of the scissors 1, and the rear end of the stationary blade tip 15 being connected to the rear end of the engagement groove 14. At the retracted position of the stationary blade tip body 15 in contact with the stationary blade body 13, the set screw 17 is screwed into the stationary blade body 13 to integrate the joint pin 9 provided at the fulcrum joint.
A hole corresponding to 1/2 of the cutting edge opening θ is located diagonally rearward on the cutting edge side of the static blade edge body 15 with respect to a line passing through the center of the joint pin hole 18 and perpendicular to the side surface of the engagement groove 14. A guide pin 12 that protrudes toward the engagement groove side of the movable blade main body 4 in the angular direction is screwed. Fig. 3 is an enlarged view of Fig. 2 A, and shows the movable blade from a state in which the base end 7 of the movable blade tip body 6 is engaged with the engagement groove 5 of the movable blade body 4 and protrudes toward the blade tip. When the main body 4 rotates and the guide pin 12 rotates around the joining pin 9, the base end 7 of the movable blade tip body 6, which is pushed and engaged with the guide pin 12, slides backward and joins. The angle between the longitudinal center line YY of pin 9 and guide pin 12 is θ/2
At this position, it is fully retracted into the engagement groove 5. At this time, the cutting edge angle of the scissors 1 becomes θ. The base end 7 moves from the fulcrum position of the joining pin 9 to the position of the guide slot 8 and the guide groove 11 shown by imaginary lines in the figure, and the front edge of the guide slot 8 comes into contact with the joint pin 9. FIG. 4 shows the cross section AA' in FIG. 3, with the movable blade tip body 6 in a protruding state, and the connecting pin 9 is inserted from the movable blade body 4 side and extends through the guide elongated hole 8 of the base end 7 of the movable blade tip body 6. It passes through and pivots the base end 16 of the stationary blade tip body 15, and
The tip portion is made to protrude into the countersunk hole of the stationary blade main body 13 and tightened with a nut 19. The guide pin 12 is a static blade tip body 15
protrudes from the engagement groove 14 side of the base end 16 of the movable blade so as to be engaged with the guide groove 11 of the base end 7 of the movable blade tip body 6 which is fitted into the engagement groove 5 of the movable blade main body 4 screwed therein. .
The set screw 17 fixes the base end 16 of the stationary blade tip body 15 to the stationary blade main body 13.

As is clear from the above description, the moving distance of the moving blade body 4 in the direction of the cutting edge is determined by the distance between the joining pin 9 and the guide pin 12. The movable blade tip body 6 of No. 4 can be moved until it overlaps the static blade tip body 15 of the stationary blade main body 13.

The above embodiment is a hair cutting scissor consisting of a moving blade and a static blade, but even in cases where there is no distinction between the moving blade and the static blade, such as office scissors, the fulcrum of both main bodies on the handle side can be connected. A guide hole and a guide groove are provided in one of the proximal ends of both cutting edge bodies to be engaged with the engagement groove, and a guide proximate to the joining pin that slidably guides the guide slot. The pin may be brought into contact with the rear end of the engagement groove of the other handle-side main body on which the pin protrudes, and may be integrated to form a pull-off pin.

[Effect of idea]

Since this invention has the above configuration, it has the following advantages.

(1) It is possible to reliably perform a shearing action by engaging a guide pin that can rotate around the joining pin of a joining part that can utilize the pulling principle with the cutting edge body of the other party.

(2) Since the structure is simple and there are no openings except for the inner surface of the joint, there is no need for a cover, and scissors with good sharpness can be provided at low cost. Furthermore, since the cutting edge body can be disassembled and replaced, it is easy to maintain and manage the sharpness.

[Brief explanation of the drawing]

FIG. 1 shows an overall assembled view (plan view) of the invention's pruning scissors. Figure A shows the state when the cutting edge is closed, and Figure B shows the state when the cutting edge is open. FIG. 2A shows an assembled view (plan view) of the joint surface side of the movable blade main body and the movable blade tip body of the hikikiri scissors engaged with each other. FIG. 2B shows an assembled view (plan view) of the joint surface side of the stationary blade body and stationary blade tip body of the hikikiri scissors. FIG. 3 shows an enlarged view (plan view) of the joint shown in FIG. 2A. FIG. 4 is a cross-sectional view along AA' of FIG. 3. Explanation of the symbols of the main parts, 1... Hikikiri scissors, 4...
... Moving blade body, 5... Engagement groove (moving blade), 6... Moving blade tip body, 7... Base end (moving blade), 8... Guide slot,
9... Connection pin, 11... Guide groove, 12... Guide pin, 13... Stationary blade body, 14... Engagement groove (static blade), 15... Stationary blade tip body, 16... Base end portion (Still blade).

Claims (1)

[Scope of utility model registration request] The base ends 7 and 16 of the movable blade tip body 6 and the static blade tip body 15 are engaged with both the movable blade body 4 and the static blade body 13 that constitute the handle side of the scissors, respectively, and are slidable in the direction of the blade tip. Grooves 5 and 14 are provided on the joining surface side of the main body, and a joining pin 9 that can join both main bodies 4 and 13 at a fulcrum is provided, and the stationary blade main body 1
The base end 16 of the stationary blade tip body 15 of No. 3 is engaged with the rear end of the engagement groove 14 until it abuts, and the engagement groove passes through the center of the joining pin 9 that is screwed into the main body 13 and is integrated with the body 13. The stationary blade tip body 15 is diagonally backward from a line perpendicular to the side surface of the blade 14, in an angular direction corresponding to 1/2 of the blade edge opening.
The movable blade tip body 6 is placed close to the fulcrum on the cutting edge side of the
A guide pin 12 that can be engaged with a guide groove 11 provided at the base end 7 of the movable blade is provided protruding from the joint surface side, and a guide pin 12 that can be engaged with the guide groove 11 provided at the base end 7 of the movable blade tip body 6 is provided to protrude in the direction of the cutting edge through the joint pin 9 that penetrates through the base end 7 of the movable blade tip body 6. A guiding elongated hole 8 that can guide the movable blade tip body 6, and a guide slot 8 that is passed through from the hole wall 10 at right angles to the side wall of the engagement groove 5 of the base end 7 on the side opposite to the cutting edge of the movable blade tip body 6. A guide groove 11 that can engage the guide pin 12 is provided on the joint surface side of the movable blade tip body 6, and the movable blade tip body 6 slides by rotation of the movable blade body 4 about the joint pin 9 as a fulcrum, thereby producing a pulling action. Hikikiri scissors characterized by forming.