JP2012157633A - Scissors - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide scissors which can stably perform the adjustment of the contact pressure of a blade tip for a long period of time.SOLUTION: The scissors 1 are constituted in such a manner that a first scissors piece 10 having a grip 11 and a blade body 12 and a second scissors piece 20 having a grip 21 and a blade body 22 are assembled so as to be turnable by a support shaft at which a bolt 70 and a nut 80 are screw-formed, and have a first recess 30 formed at the surrounding of the support shaft of the surface of the first scissors piece, a first plate body 51 which is formed of plate-shaped carbon-fiber reinforced plastic, and inserted into the first recess, and an air space forming body (annular body 61) which forms an air space between the bottom face 31 of the first recess and the first plate body.

Description

  The present invention relates to a scissors in which a pair of scissors pieces are assembled with bolts and nuts.

  In general, a pair of scissors blades are formed with a curve called “warp” so that the respective opposing surfaces are curved in opposite directions along the axial direction. This is because when cutting the object, a force in a direction to separate the blades from the object acts, so that the blades are brought into contact with each other against this force. Due to the formation of such a warp, the contact pressure increases at the blade edge as compared with the blade edge with the closing operation of the scissors, and the pair of blade bodies rub against each other while being pressed against each other by the elasticity. At this time, if the contact pressure is too large, the frictional resistance is large, the feeling of use is heavy and the hand is burdened, and the cutting edge is easily worn. On the other hand, when the contact pressure is too small, the object is sandwiched between the blade edges and is not easily cut.

  And what level of contact pressure is suitable differs depending on the use of the scissors, the type of the object to be cut, the strength of the user's fingers, the user's preference, and the like. For this reason, the heel used by professionals such as barbers and beauticians usually has a pair of scissors assembled by a support shaft formed by screwing the bolt and nut. The contact pressure of the blade edge is adjusted by adjusting the fastening condition.

  Furthermore, for the purpose of facilitating the adjustment of such contact pressure, a scissor having a leaf spring attached to the surface of a scissor piece has been proposed (see, for example, Patent Documents 1 and 2). As shown in FIGS. 8 (a) and 8 (b), the hook piece 110 including the handle portion 111 and the blade body 112 and the hook piece 120 including the handle portion 121 and the blade body 122 are composed of a bolt 131 and a nut. It is the collar 100 assembled | attached by 132, Comprising: The leaf | plate spring 140 is interposed between the surface of one collar piece 110, and the nut 132. FIG. Here, as shown in FIG. 8B, the leaf spring 140 is a curved metal thin plate, and a projecting piece 144 having one end bent is provided in the locking hole 114 provided on the surface of the collar piece 110. It is inserted.

  However, since such metal leaf springs are slightly damaged by contact with the nut, the scratches become deeper and deeper as the opening and closing operation of the heel is repeated, causing backlash and mechanical strength. descend. In addition, the metal leaf spring is also subject to fatigue (reduced) when it is repeatedly subjected to the stress acting upon the opening and closing operation of the heel. For this reason, there is a problem that the action of the spring in the leaf spring decreases with time, making it difficult to adjust the contact pressure of the blade edge. In addition, the metal leaf spring may be plastically deformed when the flange is strongly tightened with bolts and nuts, and in that case, the action of the spring can no longer be obtained.

  Therefore, in view of the above circumstances, an object of the present invention is to provide a scissors that can stably adjust the contact pressure of the blade edge over a long period of time.

  In order to solve the above-described problems, the scissors according to the present invention are described as follows: “A pair of scissors pieces each having a handle portion and a blade body can be rotated by a support shaft portion formed by screwing a bolt and a nut. A plate that is assembled and is formed of a concave portion formed around the spindle portion of at least one surface of the pair of flange pieces and a flat carbon fiber reinforced plastic, and is inserted into the concave portion. And a void forming body in which a void is formed between the bottom surface of the concave portion and the plate body ”.

  The “flat plate formed of carbon fiber reinforced plastic” is a semi-cured state in which a carbon fiber fabric or a sheet-like material in which carbon fibers are aligned in one direction is impregnated with a thermosetting resin. It is possible to use a prepreg that is cured while being held in a flat plate shape. Moreover, what was hardened in flat form in the state which laminated | stacked the said some prepreg can be used.

  The “surface” of the flange on which the recess is formed is a surface where one flange faces the other flange, that is, a surface which is slidably contacted with the opening / closing operation of the ridge (hereinafter referred to as “sliding contact surface”). Or a surface opposite to the sliding contact surface (hereinafter referred to as “outer surface”). Moreover, it can be set as the structure by which a some recessed part is formed in one ridge, and a board | plate body is inserted in each recessed part. For example, it is possible to provide a ridge having a recess formed on the outer surface of one of the flange pieces and a recess formed on the sliding surface of the other flange piece.

  As a mode in which the concave portion is formed "around the support shaft portion", in addition to a mode in which the hole portion through which the support shaft portion is inserted opens at the bottom surface of the recess portion, the hole portion through which the support shaft portion is inserted is avoided. It can be set as the aspect by which a recessed part is formed in the vicinity. Here, the shape of the recess (the shape surrounded by the inner peripheral surface of the recess) is not particularly limited, and examples thereof include an ellipse, a circle, and an egg shape. Further, it is desirable to form the plate body with the same outer shape as the concave portion and slightly smaller than the concave portion, because the plate body does not move in the concave portion when the bag is opened and closed. Furthermore, the shape of the concave portion and the plate body is non-circular or a circle whose center does not coincide with the axis of the support shaft, that is, the outer shape does not overlap before and after rotating at any angle around the axis of the support shaft. In some cases, it is desirable that the plate does not rotate when the bag is opened and closed.

  With the above configuration, the plate body bends in the recess when the pair of flanges are fastened by fastening the bolt and the nut. At this time, since a gap exists between the plate and the bottom surface of the recess, the plate can be bent in this gap. This bending of the plate makes it easy to adjust the contact pressure of the blade edge, and can absorb the stress acting around the spindle portion due to the friction of the blade edge during the closing operation of the ridge.

  In the present invention, the plate body is formed of carbon fiber reinforced plastic (hereinafter sometimes referred to as “CFRP”), and CFRP has higher fatigue strength than metals such as steel. Therefore, even if it continues to receive the stress repeatedly generated with the opening and closing operation of the bag, the above-described spring action can be stably exhibited over a long period of time.

  In addition, since CFRP has a higher yield stress than metals such as steel, even if a pair of flanges is fastened with a large force, it is difficult to be plastically deformed and the spring action is not easily lost. For example, if the plate is made of metal, it is formed to the same thickness as when it is buckled by plastic deformation when pressed by a distance formed between the bottom surface of the recess and the gap forming body. However, if it is a CFRP plate, the spring action can be exhibited without plastic deformation.

  Furthermore, CFRP has a higher specific strength than metals such as steel, so when it comes into contact with the heads of bolts and nuts or void formation bodies, it is extremely difficult to damage and causes problems such as rattling even when used for a long time. Hateful.

  In addition, since CFRP has a higher specific modulus than metals such as steel, it can provide a stronger spring action than a metal plate having the same thickness. Therefore, by reducing the thickness of the plate body, it is possible to make the concave portion into which the plate body is inserted shallow, and it is possible to reduce the risk of the strength reduction of the flange due to the formation of the concave portion. In other words, by adopting CFRP as the plate body, even if a means for inserting the plate body into the recess is employed, the risk of the strength reduction of the flange due to the formation of the recess can be reduced. Thereby, in the conventional scissors in which the leaf springs protrude from the surface of the collar piece, as exemplified in Patent Documents 1 and 2, a cutting object such as hair is entangled between the leaf springs and the collar pieces, or dust is collected. Where there is an inconvenience of being caught, such inconvenience can be avoided.

  The scissors according to the present invention may have the above-described configuration, wherein “the void forming body is an annular body that is fitted into the concave portion and has a thickness smaller than the depth of the concave portion”.

  If the “annular body” has the same outer shape as the shape surrounded by the inner peripheral surface of the concave portion and is slightly smaller than the concave portion, it is desirable that the annular body does not move in the concave portion when the bag is opened and closed.

  The scissors having the above configuration are used by fitting an annular body into the recess and placing a plate on the annular body. Therefore, the thickness of the annular body corresponds to the distance between the bottom surface of the recess and the plate body, that is, the maximum distance in the direction in which the plate body bends. It should be noted that the distance between the bottom surface of the recess and the plate can be easily changed by replacing the annular body with another annular body having a different thickness.

  The scissors according to the present invention may be configured such that, in the above configuration, the gap forming body is a step formed around the bottom surface and having a height smaller than the depth of the recess.

  The bag having the above configuration is used by placing a plate on a stepped portion in the recess. Therefore, the height of the step corresponds to the distance between the bottom surface of the recess and the plate.

  The scissors according to the present invention have the above-mentioned configuration, wherein “the concave portion is formed on a surface of one of the scissors facing the other scissors piece, and the gap forming body is fitted into the concave portion. Each spacer body has a smaller area than the bottom surface, and the plate body is placed on the spacer body and at least part of the spacer body projects outside the outer circumferential line of the spacer body. The sum of the thickness of the plate body and the thickness of the spacer body is larger than the depth of the recess on the handle portion side.

  The “spacer body” is a member for adjusting to increase or decrease the degree that the sum of the thickness of the plate body and the thickness of the spacer body is larger than the depth of the recess on the handle side. This adjustment can be performed by increasing or decreasing the number of spacer bodies. Alternatively, the adjustment can also be performed by changing the combination of spacer bodies selected for fitting into the recesses from a plurality of types of spacer bodies having different thicknesses. Further, the means for making the sum of the thickness of the plate body and the thickness of the spacer body larger than the depth of the recess “on the side of the handle portion” is to increase the thickness of the spacer body toward the handle portion side. Or you may reduce the depth of a recessed part toward the handle part side.

  In the bag having the above structure, since the sum of the thickness of the plate body and the thickness of the spacer body is larger than the depth of the recess on the handle part side, a force acts in the direction of separating the pair of hook pieces on the handle part side. To do. As a result, on the blade edge side, each flange piece is pressed against the other side, and the blade edges are strongly pressed against each other. Therefore, the contact pressure of the blade edge is adjusted by changing the extent that the total thickness of the spacer body and the thickness of the plate body is larger than the depth of the recess on the handle side, depending on the number and combination of the spacer bodies. can do.

  At this time, a pressing force acts on the plate body from the facing piece, but since at least a part of the plate projects outward from the outer circumferential line of the spacer body, the bottom surface of the recess and the plate body are in that portion. There are voids between them. As a result, since the plate body bends at this portion, it becomes easy to finely adjust the contact pressure of the blade edge as described above, and the stress acting on the support shaft portion when the blade edges rub against each other is reduced. It can be absorbed by elasticity.

  As described above, as an effect of the present invention, it is possible to provide a scissors that can stably adjust the contact pressure of the blade edge over a long period of time.

It is a disassembled perspective view of the bag of 1st embodiment of this invention. (A) The principal part disassembled perspective view of the scissors of FIG. 1, (b) The principal part disassembled perspective view of the scissors of 2nd embodiment of this invention. FIG. 2A is a cross-sectional view for explaining the vicinity of the first recess, and FIG. 2B is a cross-sectional view for explaining the vicinity of the second recess. It is the figure which piled up the spacer body on the 2nd plate body, and was seen from right above. It is sectional drawing explaining the 1st recessed part vicinity about the collar of FIG.2 (b). It is a disassembled perspective view of the bag of other embodiment. It is a figure explaining the direction of the carbon fiber in a board. It is the (a) top view of the conventional bag, and (b) principal part sectional drawing.

  Hereinafter, the bag which is the first embodiment of the present invention will be described with reference to FIG. 1, FIG. 2 (a), FIG. 3 and FIG. In the present embodiment, a case where the present invention is applied to a barber for hairdressing used by a hairdresser or a barber is illustrated.

  As shown in FIG. 1, the heel 1 of the first embodiment includes a first heel piece 10 having a handle portion 11 having a finger passage hole 11 f and a blade body 12, and a handle portion 21 having a finger passage hole 21 f. And the second collar piece 20 having the blade body 22 is a collar that is rotatably assembled by a support shaft portion formed by screwing the bolt 70 and the nut 80, A first recess 30 formed around the spindle portion of the surface, a first plate 51 formed of a flat carbon fiber reinforced plastic and inserted into the first recess 30, and a bottom surface 31 of the first recess 30 A first gap forming body in which a gap S is formed between the first plate body 51 and the first plate body 51. Here, in the first embodiment, the first gap forming body is configured by the annular body 61 fitted in the first recess 30 and having a thickness smaller than the depth of the first recess 30.

  Furthermore, the collar 1 is formed of a second concave portion 40 formed around the spindle portion of the sliding contact surface of the second collar piece 20 and a flat carbon fiber reinforced plastic, and is inserted into the second concave portion 40. A two-plate body 52 and a second gap forming body in which a gap S is formed between the bottom surface 41 of the second recess 40 and the second plate body 52 are provided. Here, the second gap forming body is composed of a plurality of flat plate-like spacer bodies 62 fitted in the second recesses 40, and each spacer body 62 has a smaller area than the bottom surface 41 of the second recess 40, and The plate body 52 is placed on the spacer body 62, and at least a part of the plate body 52 projects outward from the outer circumferential line of the spacer body 62.

  More specifically, the nut shaft portion 82 of the nut 80 has a cylindrical portion 82a and a rectangular column portion 82b, and a screw groove 83 is formed therein. A rectangular shaft hole 15 through which the prismatic portion 82 b of the nut shaft portion 82 can be inserted is formed in the first collar piece 10, and a cylinder of the nut shaft portion 82 is formed in the second collar piece 20. A circular shaft hole 25 through which the portion 82a can be inserted is drilled. A nut head 81 having a larger diameter than the outer shape of the cylindrical portion 82a is provided at the end of the nut shaft portion 82 on the cylindrical portion 82a side. On the other hand, the bolt 70 includes a bolt shaft portion 72 having a screw thread that engages with the screw groove 83 of the nut shaft portion 82, and a bolt head portion 71 provided at one end of the bolt shaft portion 72. When the screw groove 83 of the nut 80 and the screw thread of the bolt 70 are screwed together, a support shaft portion is formed by the nut shaft portion 82 and the bolt shaft portion 72.

  The first recess 30 is formed around the shaft hole 15 on the outer surface of the first collar piece 10, and the shaft hole 15 is open on the bottom surface 31 thereof. In the present embodiment, the shape of the first recess 30 (the shape surrounded by the inner peripheral surface of the first recess 30) and the outer shape of the bottom surface 31 are egg-shaped.

  Both the annular body 61 and the first plate body 51 formed of carbon fiber reinforced plastic have the same outer shape as the first recess 30 and are slightly smaller than the first recess 30. Therefore, both the annular body 61 and the first plate body 51 are fitted into the first recess 30 exactly. A through hole 51 h is formed in the first plate 51 at a position that matches the shaft hole 15 in a state of being fitted in the first recess 30.

  On the other hand, the second recess 40 is formed around the shaft hole 25 on the sliding contact surface of the second collar piece 20, and the shaft hole 25 is opened on the bottom surface 41. In the present embodiment, the shape of the second recess 40 is oval like the first recess 30. Moreover, the 2nd recessed part 40 is formed so that it may become shallow from the blade body side to the handle part side with the substantially same depth from the blade body side to the axial hole 25, as shown in FIG. FIG. 3 exaggerates the actual dimensional ratio for the convenience of explaining the inclination of the bottom of the second recess 40. FIG. 3A illustrates a state in which the spacer body 62 and the second plate body 52 are not fitted in the second recess 40.

  The second plate body 52 inserted into the second recess 40 has an outer shape that is the same as the shape of the second recess 40 and is slightly smaller than the second recess 40. Can be fitted. On the other hand, the spacer body 62 is overlapped with the second plate body 52, and a part of the outer shape thereof coincides with the outer shape of the second plate body 52. It is formed so as to be located on the inner side. Specifically, as shown in FIG. 4 illustrating the state in which the spacer body 62 is overlaid on the second plate body 52, the outer peripheral lines of the egg-shaped outer shape coincide with each other on the small curvature side. On the larger side, the curvature of the spacer body 62 is smaller than the curvature of the second plate body 52.

  In the present embodiment, the outer shapes of the plurality of spacer bodies 62 are the same, but the thickness may be set differently or may be the same. Each spacer body 62 is provided with a through hole 62h at a position coinciding with the shaft hole 25 when fitted into the second recess 40. Further, the second plate body 52 is provided with a through hole 52h having the same size as the through hole 62h at a position coincident with the shaft hole 25 and the through hole 62h in a state of being placed on the uppermost spacer body 62. It is installed.

  It should be noted that the total thickness of the spacer body 62 and the second plate body 52 is the depth on the handle portion side of the second recess 40 in the initial state where the collar 1 is not worn or polished by use. The thickness and the number of the spacer bodies 62 and the depth of the second recess 40 are set so as to be larger than the depth and equal to or less than the depth of the second recess 40 on the blade side.

  Next, the usage method and operation of the bag 1 of the first embodiment will be described. In the scissors 1, the contact pressure of the blade edge can be adjusted by two methods. One method is to change the degree of tightening by the support shaft portions of the first collar piece 10 and the second collar piece 20 by screwing and screwing the bolt shaft portion 72 in the screw groove 83 of the nut shaft portion 82. It is to let you. If it tightens strongly, the 1st collar piece 10 and the 2nd collar piece 20 will closely_contact | adhere, and a mutual blade edge will be press-contacted more strongly. At this time, the first plate 51 is pressed by the bolt head 71 and the first plate 51 bends.

  By such a deflection of the first plate body 51, it becomes easy to finely adjust the contact pressure of the blade edges of the first collar piece 10 and the second collar piece 20. Further, when the cutting edges of the first hook piece 10 and the second hook piece 20 with increased contact pressure are rubbed against each other while being pressed against each other, around the support shaft portions of the first hook piece 10 and the second hook piece 20, respectively. The acting stress can be absorbed by the elasticity of the first plate body 51. A washer 69 can be interposed between the first plate 51 and the bolt head 71.

  Another method for adjusting the contact pressure is to vary the number of spacer bodies 62 fitted into the second recess 40 and the combination of spacer bodies 62 having different thicknesses. When the sum of the thickness of the spacer body 62 and the thickness of the second plate body 52 is larger than the depth of the second recess 40 on the handle portion side, as shown in FIG. The force which separates the 1st collar piece 10 and the 2nd collar piece 20 acts, and the blade edge of the 1st collar piece 10 and the blade edge of the 2nd collar piece 20 will press-contact more strongly. Therefore, the spacer body 62 and the second plate body 52 are mounted on the spacer body 62 by changing the degree that the sum of the thicknesses of the second plate body 52 is larger than the depth of the second recess 40 on the handle portion side. By changing the height at which the placed second plate 52 protrudes from the sliding contact surface of the second collar piece 20 on the handle portion side, the contact pressure of the blade edge can be changed. For example, the contact pressure of the blade edge can be increased or decreased depending on the use of the scissors or the user's preference. In addition, even when the blade body becomes thin and the contact pressure of the blade edge decreases due to wear or polishing process associated with the use of the scissors, the contact pressure of the blade edge is increased by increasing the total thickness of the spacer body 62. Can do.

  At this time, a pressing force is applied to the second plate body 52 from the first flange piece 10, but the second plate body 52 partially protrudes outward from the spacer body 62, and the second plate body 52 is formed at that portion. And a space S is formed between the bottom surface of the second recess 40. Therefore, the second plate body 52 can bend in the gap S. Thereby, in addition to the first plate body 51, the second plate body 52 makes it easy to finely adjust the contact pressure of the blade edge, and stress acting around the support shaft portion when the blade edges rub against each other, It can be absorbed by the elasticity of the second plate 52. FIG. 3B does not accurately illustrate the thicknesses of the spacer body 62 and the second plate body 52 and the height at which the second plate body 52 protrudes from the sliding contact surface of the second collar piece 20. Absent. Further, FIG. 3B does not show the state until the second plate 52 is bent.

  Here, it is preferable that the first plate body 51 and the second plate body 52 made of carbon fiber reinforced plastic have a thickness of 0.15 mm to 0.3 mm. If the first plate body 51 and the second plate body 52 are too thin, the mechanical strength may be insufficient, and if it is too thick, it is difficult to bend. Moreover, the thickness of the annular body 61 can be 0.4 mm-0.5 mm. When the annular body 61 is too thin, the amount of bending of the first plate body 51 and the second plate body 52 is limited. On the other hand, when the annular body 61 is too thick, the recesses must be deepened, and the strength of the collar piece may be reduced. is there.

  Carbon obtained by laminating and curing two prepregs (made by Toray, F6142-05K) with a thickness of 0.13 mm impregnated with epoxy resin on a cloth made of carbon fiber made from polyacrylonitrile fiber. A first plate (thickness 0.26 mm) was formed from a fiber reinforced plastic sheet. And in the ridge which formed the 1st recessed part of about 0.8 mm in the 1st collar piece, after inserting the annular body 61 of thickness 0.5mm in the 1st recessed part, and mounting the 1st board | plate body on it And assembled with the second piece with bolts and nuts.

  According to this scissors, even if the first scissors and the second scissors are strongly tightened by fastening bolts and nuts, the first plate body does not plastically deform and is 0.5 mm from the bottom surface of the first recess. It bends enough in a remote space. And the deflection returned to the original state except for the tightening force by the bolt and nut. Moreover, even when the opening and closing of the heel was repeated an infinite number of times (the number of fatigue tests), no change was seen in the action of the spring of the first plate. Furthermore, since the first plate body is highly elastic, it is easy to finely adjust the contact pressure of the blade edge. In addition, the surface of the first plate after the opening and closing of the heel is repeated an infinite number of times, the scratches observed with the naked eye both in the part that contacts the bolt head and in the part that contacts the inner periphery of the annular body There were no scratches that were felt by hand or touch. That is, the contact pressure can be stably adjusted over a long period of time because the action of the spring of the first plate body is favorably sustained over a long period of time. In addition, even when using firewood for a long time, no problems such as rattling occurred.

  Incidentally, when a metal plate formed of stainless steel (for example, SUS304) with a thickness of about 0.3 mm, which is the same as the first plate body, is used instead of the first plate body, If there is a distance of 0.5 mm between the plate and the plate, the metal plate will be plastically deformed when the first and second hook pieces are tightened with bolts and nuts. In addition, in the commercial product of the conventional scissors illustrated by patent documents 1 and 2, the thickness of a metal leaf | plate spring is a very thick thing of 0.6 mm-0.7 mm.

  As described above, when a plurality of prepregs are laminated to form a CFRP plate (first plate, second plate), if the layers are laminated so that the directions of the carbon fibers in each layer are different, twisting and The anisotropy of the elastic modulus of the plate against shearing is reduced. On the other hand, by laminating the prepreg so that the directions of the carbon fibers in each layer coincide with each other, a plate body having a large elastic modulus anisotropy can also be obtained. In this case, by changing the direction of the carbon fiber in the plate body, it is possible to design ridges having different spring characteristics exhibited by the plate body. For example, as shown in FIGS. 7 (a) and 7 (b), the plate body 51a and the plate body 52b are different in the direction of the carbon fiber with respect to the axial direction of the hook piece to be attached. Is different.

  Next, the scissors 2 of the second embodiment will be described with reference to FIGS. 2B and 5. The difference from the ridge 1 of the first embodiment is a step 33 in which the first gap forming body is formed around the bottom surface 31 of the first recess 30 and the height is smaller than the depth of the first recess 30. Is a point. Other configurations are the same as those of the first embodiment, and the same reference numerals are given and detailed description thereof is omitted.

  Also by such a step part 33, since the space | gap S is formed between the bottom face 31 of the 1st recessed part 30, and the 1st board 51, the 1st board 51 can bend, The same effect as the first plate 51 is exhibited. In addition, the height of the step part 33 can be 0.4 mm-0.5 mm similarly to the thickness of the annular body 61 of 1st embodiment.

  The present invention has been described with reference to a preferred embodiment. However, the present invention is not limited to this embodiment, and various improvements and modifications can be made without departing from the spirit of the present invention as described below. Design changes are possible.

  For example, in the above, the case where the first collar piece 10 is a stationary blade and the second collar piece 20 is a moving blade is illustrated, and the first recess 30 (the annular body 61 is fitted on the outer surface of the first collar piece 10. Alternatively, a case in which a concave portion in which the step portion 33 is formed) is provided and the second concave portion 40 (a concave portion in which the spacer body 62 is fitted) is provided on the sliding contact surface of the second collar piece 20 is illustrated. Instead, the first recess may be provided on the outer surface of the moving blade and the second recess may be provided on the sliding surface of the stationary blade. Moreover, although the case where both the 1st recessed part and the 2nd recessed part were egg-shaped was illustrated above, the shape is not limited to egg-shaped.

  Such a bag 3 of another embodiment will be described with reference to FIG. In the scissors 3, a heart-shaped first recess 35 is formed on the outer surface of the second scissors 20 that is a moving blade, and a circular second recess 45 is formed on the sliding contact surface of the first scissors 10 that is a stationary blade. Is formed. A first plate 55 formed in a heart shape by CFRP is inserted into the first recess 35 after a heart-shaped annular body 65 is fitted therein. On the other hand, a spacer plate 66 having a circular part cut out in a crescent shape is fitted into the second recess 45, and then a second plate 56 formed in a circular shape by CFRP is inserted.

  The hook 3 has a non-circular heart shape on the nut head 85a and is fitted into a heart-shaped recess (not shown) formed on the outer surface of the first hook piece 10 to thereby form the first hook piece 10. Is pivoted integrally with the support shaft part to suppress loosening of the bolt 70 and the nut 85. Therefore, unlike the rod 1 of the first embodiment and the rod 2 of the second embodiment in which the support shaft portion includes the cylindrical portion 82a and the prismatic portion 82b, the nut shaft portion 85b has a cylindrical shape, and the first rod piece 10 Both the shaft hole 16 that penetrates the shaft hole 26 and the shaft hole 26 that penetrates the second collar piece 20 are circular.

  Moreover, although the case where the 1st recessed part 30 (or 35) was formed in one outer surface of a pair of hook pieces was illustrated in the above, it is not limited to this, The first recessed part is formed in the outer surface of both hook pieces. It can be a ridge formed. Furthermore, in the above, the case where the first concave portion 30 (or 35) is formed on the outer surface of the flange piece and the second concave portion 40 is formed on the sliding contact surface is illustrated, but the present invention is not limited to this, and the outer surface and It is also possible to use a ridge in which first concave portions are formed on both sliding surfaces.

1, 2, 3 鋏 10 first hook piece 11 handle part 12 blade body 20 second hook piece 21 handle part 22 blade bodies 30, 35 first recess (recess)
31 Bottom of first recess (bottom of recess)
33 steps (void forming body)
40 Second recess (recess)
41 Bottom of second recess (bottom of recess)
51, 55 First plate (plate)
52, 56 Second plate (plate)
70 Bolt 80 Nut 61 Ring body (gap forming body)
62, 66 Spacer body (void forming body)

JP 7-299261 A JP-A-8-52285

Claims (4)

A pair of scissors pieces each having a handle portion and a blade body are scissors assembled so as to be rotatable by a support shaft portion formed by screwing a bolt and a nut,
A recess formed around the spindle portion of at least one surface of the pair of flanges;
A plate body formed of a flat carbon fiber reinforced plastic and inserted into the recess,
And a gap forming body in which a gap is formed between the bottom surface of the recess and the plate. 2. The bag according to claim 1, wherein the gap forming body is an annular body that is fitted into the recess and has a thickness smaller than the depth of the recess. 2. The bag according to claim 1, wherein the gap forming body is a step portion formed around the bottom surface and having a height smaller than the depth of the concave portion. The concave portion is formed on a surface of the one piece facing the other piece,
The gap forming body is composed of a plurality of flat plate-like spacer bodies fitted in the recesses,
Each spacer body has a smaller area than the bottom surface, and the plate body is placed on the spacer body, and at least part of the spacer body projects outward from the outer circumferential line of the spacer body,
The bag according to claim 1, wherein the sum of the thickness of the plate body and the thickness of the spacer body is larger than the depth of the concave portion on the handle portion side.

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