JPH0655331A - Tin snips - Google Patents

Abstract

PURPOSE:To make the force, required at the cutting time, extremely effective by forming tin snips in such a way that the engaged face, with a lower blade, of an upper blade interlocked with an other-finger handle faces the same side as the overlapped side with a thumb handle. CONSTITUTION:After crossing an other-finger handle 1 and a thumb handle 4 at a pivot part 9, an upper blade 3 is formed frontward from the pivot part 7 of the other-finger handle 1 in such a way that the blade bottom part is shifted down to the lower side from the pivot part 7 so as to place the blade tip part in the rising state, and a lower blade 6 is formed frontward from the pivot part 7 of the thumb handle 4, with an engagement relief margin part interposed in between. The engaged face, with the lower blade 6, of the upper blade 3 interlocked with the other-finger handle 1 thereby faces the same side as the overlapped side with the thumb handle 4.

Description

Detailed Description of the Invention

[0001]

OBJECTS OF THE INVENTION The present invention is directed to thin steel plates, such as tin plates,
It relates to a new structure of so-called tinplate scissors for cutting galvanized sheets, stainless steel thin plates, etc., so that the thin steel plates to be cut are left in a substantially linear shape on the left and right during cutting. Developed mainly to
It is intended to provide finished and useful tinplate scissors.

[0002]

2. Description of the Related Art In addition to exterior structures such as roofs and outer walls in buildings, and internal structures centering around water such as kitchen equipment, advertising signs, cover cases for various mechanical devices, show window cases, etc. Thin steel sheets are used, except those processed by machine cutting in the factory,
Artisan-like cutting using the traditional tool "tin scissors" is still practiced. This tin scissor has a traditional structure as shown in the plan view showing the usage state of FIG. 6 and the side view of FIG. 7, and is for the right hand use of this example. Then, the handles J1 and J4
Crossover point of upper blade J3 and lower blade J6 and spindle J7
The cut edge of the thin steel plate S, which deviates to the right from the extension of the line connecting to and is cut so that it does not touch the thumb,
Even if the hand H, which advances the cutting process and holds the handle, enters between the separated left and right pieces of the thin steel plate, only the piece S1 that is separated on the left side of the drawing is substantially horizontal, as can be understood from FIG. Even if it remains in the state, there is no possibility that it will be touched by the thumb, and therefore the operating hand H is not damaged by the cut.

On the other hand, in the piece S2 which is cut to the right side in the drawing as the cutting process proceeds, as understood from the plan view of FIG. 6, the operating hand (right hand) H holding the handle moves to the right side from the meshing surface. If the right piece S2 is left in a substantially horizontal state as a result of the shift, it naturally collides with the right piece cutting portion and interferes with the cutting work, and at the same time there is a risk of injury at the cut end. Therefore, as shown in the side view of FIG. 7, it is always necessary to perform a special processing operation so that the right piece S2 and the hand H which are being separated can be bent back. This kind of processing operation requires a certain amount of skill, and above all, the most serious adverse effect is that the pieces 1 and S2 that are to be cut off will be greatly curved and deformed, and cutting processing while bending. Cutting process 1
This is an extremely troublesome problem that a deformation habit is added to each stroke, which causes a wavy phenomenon at the cut end.

Therefore, the thin steel plate pieces S1 and S2 cut into the predetermined size and shape are subjected to a large amount of bending in addition to the work of always correcting the large bending deformation as a pretreatment process to be adopted at a predetermined position. It is necessary to remove the distortion caused by the irregular waviness that remains inside. It goes without saying that these works must be basically useless work, and if they can be eliminated, they are of course better, and as a result, they lead to the economic effect of improving work efficiency. However, it is almost impossible to perfectly carry out the correction of the curved deformation and the removal of the fine distortion, and therefore,
The purpose of avoiding them in the cutting process is not limited to the purpose of merely increasing the economic effect, but rather, avoiding the difficulty of perfecting the straightening and removing work and increasing the commercial value of the processed thin steel sheet. It should be said that it is to raise.

That is, the work of correcting the curving deformation and the work of removing the distortion phenomenon are unlikely to be carried out by machining, and most of them are carried out manually by the operator. It is completely impossible to return the cut thin steel plate to the original perfect smooth surface by work, and it will leave a lot of subtle distortions on the plate surface.
In the era when stainless steel sheets are frequently used as thin steel sheets for a variety of reasons such as these days, it is valuable only if the material has a spectacular mirror surface, and even a slight distortion of the mirror surface will reduce the product value. Unlike the case of the color galvanized iron plate that was not so conspicuous even if there was some distortion left as it was a while ago, the deformation during this cutting process was reduced as much as possible. , The problem of being able to omit the subsequent correction work,
Widely recognized as an extremely important issue. In order to meet the needs of the times as described above, the present invention has earnestly achieved the results as a result of continued earnest development and research based on many years of experience. This is a detailed and more specific explanation.

[0006]

As will be understood from the typical embodiment shown in the drawings, the tinplate scissors of the present invention basically have the following construction. That is, a substantially linear other finger handle shared by fingers other than the thumb of the operating hand and a thumb handle in which the front end side of the operating hand, which is shared by the thumb, is curved largely downward, are respectively pivoted at the support shaft portions. After stopping and crossing, the upper blade from the spindle part of the other finger handle through the upper blade base part, the edge of the blade is slightly slanted downward from the spindle part and the edge rises. On the other hand, on the other hand, from the support shaft portion of the thumb handle, a lower blade base portion extending in a downward direction by a length required for meshing with the upper blade and a lower end of the lower blade base portion are formed. In the pivot axis direction of the support shaft portion, and the engagement escape margin portion bent substantially horizontally and at a right angle toward the other finger handle stacking side, and the engagement escape margin portion on the blade tail side, A lower blade is formed so that the cutting edge direction is substantially orthogonal to the base of the lower blade. By being, the upper blade to be linked to other finger handle,
The tines are characterized in that the meshing surface with the lower blade faces the same side as the overlapping side with the thumb handle.

The other-finger handle is a handle other than the thumb, that is, the index finger, the middle finger, the ring finger, and the little finger, or the handle for sharing the operation with some of them. It has a linear shape, and a pivot shaft fitting for pivotal support such as a pivot is inserted through the front end side of the shaft to form a support shaft portion for opening and closing with a thumb handle, which will be described later. Should be stopped in a straight line, or if necessary, the rear end should be folded back from front to bottom in a U-turn shape, and should be shaped like an arched handle used for scissors. You can also

The front end side of the other finger handle is formed on the base of the upper blade by further extending the tip from the support shaft portion, and the upper blade is further formed on the tip side thereof. The butt is slightly larger from the spindle to the lower side, for example, the blade edge side is gradually raised upward from the position shifted so that the value becomes around 2 to 3 cm. Must be formed. The upper blade may be formed integrally with the front end of the other finger handle, from the support shaft portion, through the upper blade base portion, and outside, from the upper blade base portion to the front side, the posture of the upper blade that should be substantially formed. , The blade base part having the same shape is integrally formed, and the upper blade formed separately and the blade base part are integrated by screwing or other detachable means as appropriate. It is also possible to adopt a structure in which a new upper blade can be exchanged and used as needed at a stage when it becomes worn and interferes with the cutting process.

The thumb handle is a handle on which the thumb of the operator's hand shares and operates, and the front end side following the substantially straight grip portion is curved downward largely, and the spindle portion is formed. The above-mentioned support shaft portion of the other finger handle is overlapped on the support shaft portion, and a pivot metal fitting such as a pivot serves as a support shaft between them to open and close the thumb handle and the other finger handle. As in the case of the other finger handle, the shape of the rear end side is fixed to the end while keeping it straight, or if necessary, the rear end side is moved forward from above from the front side.
It can also be turned like a turn and shaped like an arcuate handle used for scissors. on the other hand,
The front end side of the thumb handle extends from the support shaft portion to a length required for further engagement with the upper blade, for example, by extending about 2 cm in the downward direction to form a lower blade base portion, and below that. The lower end of the blade base is in the axial direction of a metal fitting such as a pivot that is adopted to perform a pivot function in the pivot, and is substantially right angle and horizontal toward the side where the above-mentioned other finger handle is overlapped. It is bent into a shape and used as a relief area for engagement.

In this engagement clearance portion, the engagement surface of the upper blade interlocking with the other finger handle with respect to the lower blade is on the same side as the overlapping side with the thumb handle, that is, the other finger handle with respect to the thumb handle. If it is superposed on the upper side (the front side of the paper surface in the drawings of the embodiments), the surface of the upper blade that engages with the lower blade also has the upper surface (the front surface of the paper surface in the drawings of the embodiments) that is the engagement surface of the lower blade. It is an indispensable structure to be opposed to
The dimension of bending and forming from the lower blade base is approximately equal to the wall thickness of the upper blade (in the case of a blade that can be attached to and detached from the blade base, the thickness including the blade base). Then, the lower blade makes this engagement clearance margin part on the side of the blade edge, and changes the direction of the blade edge.
Substantially orthogonal from the spindle part to the lower blade base part (however,
It is formed so as to have an orthogonal shape different from the bending direction of the engagement clearance margin portion). Similar to the above-mentioned upper blade, this lower blade is appropriately screwed to the blade base portion integrally formed in the engagement clearance portion in the same manner as the posture and shape of the lower blade to be formed, and other detachable means. It is also possible to make it integrated with.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention shown in the drawings will be described in detail below so that the technical idea of tinplate scissors of the present invention can be understood more clearly. In the embodiment shown here, the upper blade 3 and the lower blade 6 are detachably integrated with the blade base portions 31 and 61, respectively.
Is an example of a tin clipper that can be replaced with new upper blades 3 and lower blades 6 when they become worn and become less sharp. Also understood from the entire perspective view showing the upper blade 3 and the lower blade 6 in an open state in FIG. 1, and the overall perspective view showing the state in which the upper blade 3 and the lower blade 6 are removed from the blade base portions 31 and 61 in FIG. As described above, first, the other finger handle 1 has a main part, that is,
The index finger, middle finger, ring finger, little finger, or all four of which are to be gripped is formed by a substantially linear round bar, and the front end side thereof is crushed to form a support shaft portion. The front end side is the upper blade base 2, and the blade base 34 is formed continuously with the upper blade base 2.

The blade base 34 has a portion corresponding to the edge of the blade so that the upper blade 3 to be attached has a predetermined posture and shape.
It is formed to have a similar shape slightly larger than the upper blade 3 with the blade tip rising from a position eccentric about 3 cm downward from the support shaft portion, and a threaded hole 35 for mounting the upper blade 3.
35 is drilled, and the removable screws 8 and 8 inserted from the upper blade 3 side
The upper blade 3 is formed so as to be fixed and removable. The upper blade 3 is a single blade, and the surface (the surface without the ridge 32) that meshes with the lower blade 6 to be described later is on the side opposite to the blade base portion 34 (that is, on the same side as the stacking side with respect to the thumb handle 4,
Front side on paper. Therefore, the blade 32 is on the blade base 34 side,
It is screwed so that it is the back side on the page. 33 in the figure
Shows a through hole for inserting the detachable screw 8 when fixing the upper blade 3 to the blade rest 34.

The thumb handle 4 has a substantially straight shape and is formed by a round bar, and the front end side thereof is gradually crushed to have a cross-sectional shape and is bent downward greatly. By forming a support shaft portion corresponding to the support shaft portion, stacking the support shaft portion of the other finger handle 1 on the support shaft portion, and pivotally attaching the support shaft portion with a metal fitting 7 serving as a support shaft such as a pivot, The thumb handle 4 and the other finger handle 1 are formed so as to be opened and closed. Then, the tip of the support shaft of the thumb handle 4 is extended vertically downward by about 2.5 cm, which is the length required for meshing with the upper blade 3, to form the lower blade base 5. , The lower end of the lower blade base 5,
As shown in the enlarged perspective view of the main part of FIG.
1 is the axial direction of the shaft fitting 7 such as a pivot adopted to perform the pivot function, and the side on which the above-mentioned other finger handle 1 is overlapped (the front side of the paper surface in FIGS. 1 and 2). The bending clearance portion 51 is formed by bending in a substantially right angle and a horizontal direction downward in the plan view of FIG.

The lower blade 6 is also a single-edged blade, and the engagement clearance allowance portion 5 is provided.
1 from the side of the engagement escape margin portion 51 of the blade base portion 64 integrally formed so as to be on the blade tail side (the back side in the drawing), the reed 62 is on the blade base portion 64 side (thus, with the upper blade 3). Like the upper blade 3, make sure that the meshing surface is the back side of the paper.
Fix it with the detaching screws 9, 9. In the figure, 63 is the lower blade 6
When fixing the blade to the blade base portion 64, a through hole for inserting the removable screw 9 is shown, and 65 is a threaded hole into which the removable screw 9 is screwed. Both the upper blade 3 and the lower blade 6 of the embodiment have single-edged blades 31 and 61, respectively, as shown in an enlarged view of an essential part with an enlarged view in which the blades 31 and 61 of FIG. 3 are partially enlarged in two stages. Fine mountains 31a, 31 that are orthogonal to the ridges 32 and 62 or have an inclined shape close to them
., and 61a, 61a, .. are wave-processed.

[0015]

The tinplate shears of the present invention having the above-described structure are cut and separated as clearly understood from the side view showing the usage state of FIG. Is capable of being cut in a state where it is eccentric to a lower side by a predetermined distance from a support shaft portion axially mounted by a shaft mounting metal fitting 7 such as a pivot. This is the other finger handle 1
The upper blade 3 interlocked with the upper blade base 2 is connected so as to have a regulated positional relationship with the upper blade base 2, and is eccentric with the spindle portion.
The lower blade 6 that interlocks with the thumb handle 4 is also realized by being connected in a regulated state to the lower blade base 5 that is formed by extending a predetermined distance from the support shaft portion in a direction directly below so as to correspond to the upper blade 3 described above. ing.

Conventionally, as can be seen in the plan view of the use state of FIG. 6 and the tin scissors shown as the side view of FIG. 7, another finger handle that interlocks with the upper blade J3 pivotally attached to the support shaft portion J7. J1 and a thumb handle J4 that interlocks the lower blade J6 are formed in a substantially symmetrical shape on the side surface, and on the line connecting the center of the other finger handle J1 and the thumb handle J4 and the spindle J7. Upper blade J3 and lower blade J for cutting thin steel plate S
Since there are 6 meshing intersection points, the thin steel plates S1 and S2 that are separated are always directed toward the support shaft portion J7 so that the cutting process is not hindered by these thin steel plates S1 and S2. In order to prevent the operator's hand H from being damaged, as shown in FIG.
3 and the lower blade J6, the handle J1. One thin steel plate S1 separated so that J4 is detached is avoided, and the other thin steel plate S2 separated on the escape side is curved downward as shown in FIG.
Although it has been deformed, in the present invention, such an unreasonable measure is not required at all, and therefore, the operation of the scissors becomes extremely natural, and at the same time, the distortion of the thin steel plates S1 and S2 that are separated from each other is above all. With the outstanding effect of being able to keep it to a minimum, it will be possible to realize optimal scissors for cutting stainless steel sheets that are most affected by distortion.

Further, the lower blade 6 interlocked with the thumb handle 4
As a result of being formed so as to intervene through the engagement clearance portion 51 provided at the lower end of the lower blade base 5, as a result, the engagement surface of the upper blade 3 interlocking with the other finger handle 1 with respect to the lower blade 6 (of the ridge 32). Surface) can be on the same side as the overlapping side of the other finger handle 1 with respect to the thumb handle 4, and therefore,
The force transmitted through the support shaft when gripping each of the handles 1 and 4 naturally causes the upper blade 3 and the lower blade 6 at the meshing intersection point.
And will act on the sides that attract each other, and the force required for cutting will be utilized very effectively.

Particularly, as in the embodiment, when the blades 31 and 61 of the upper blade 3 and the lower blade 6 of the single blade are wave-processed, the biting to the thin steel plate S at the meshing crossing point is good. Moreover, since it lasts for a long time, the above-mentioned effect is further enhanced. Further, in the tin scissors in which the upper blade 3 and the lower blade 6 are detachable, the blades 31 and 61 are extremely worn due to cutting of a hard thin plate such as a stainless thin plate. Even if you encounter the above, it is possible to easily deal with such situations by preparing some new sets of new blades in advance. We will realize tinsel scissors suitable for cutting thin stainless steel plates.

As mentioned above, the tin scissors of the present invention are
In terms of the effect of suppressing the occurrence of distortion on the thin steel plates that are being separated, the improvement of the operability and safety of the worker, etc., it exhibits excellent effects that could not be realized with the conventional ones, and the structure is It is expected to be highly evaluated especially as a tool for cutting and processing hard thin plates such as stainless thin plates, because it is simple, has few failures, and is economical to withstand long-term use.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a tin clipper representing the present invention.

FIG. 2 is an exploded perspective view of the same as above.

FIG. 3 is an enlarged view of a main part of the lower blade with an enlarged view in which the blade of the lower blade of the present invention is partially enlarged in two stages.

FIG. 4 is a side view showing a usage state of the above-mentioned figure.

FIG. 5 is a plan view of the above figure.

FIG. 6 is a plan view showing a usage state of a conventional product.

FIG. 7 is a side view of the same.

FIG. 8 is an enlarged perspective view of an essential part centering on the lower blade of the tin clipper of the present invention.

[Explanation of symbols]

 1 Other Finger Handle 2 Upper Blade Base 3 Upper Blade 31 Same Blade 32 Same Blade 33 Same Through Hole 34 Same Blade Stand 35 Same Screw Cutting Hole 4 Thumb Handle 41 Same Support Shaft 5 Lower Blade Base 6 Lower Blade 61 Same Blade 62 Same assole 63 Same through hole 64 Same blade base 65 Same screw cutting hole 7 Shaft mounting metal fittings such as pivot 8 Desorption screw fixing upper blade 9 Desorption screw fixing lower blade H Operator S Thin steel plate

Claims (3)

[Claims] 1. A substantially linear other finger handle shared by a finger other than the thumb of the operating hand, and a thumb handle in which a front end side of the operating hand, which is shared by the thumb, is curved so as to be greatly downward, respectively. In addition to pivoting and crossing at the other part, the upper blade from the spindle part of the other finger handle goes through the upper blade base part, and the tip of the blade is slightly offset from the spindle part to the lower side. On the other hand, while being formed so as to be in an upright shape, a lower blade base portion extending downward from the support shaft portion of the thumb handle for a length necessary for meshing with the upper blade,
A mating clearance allowance part in which the lower end of the lower blade base is bent in the axial direction of the shaft fitting of the support shaft part and at a substantially right angle and horizontally toward the other finger handle stacking side, and the mating clearance allowance. The lower blade is formed so that the cutting edge direction is substantially orthogonal to the lower blade base, and the upper blade that interlocks with another finger handle meshes with the lower blade. The surface is
Tin scissors characterized by facing the same side as the thumb handle. 2. A blade rest portion is integrally formed with an engagement clearance portion formed at the lower blade base portion of the other finger handle and the lower blade base portion of the thumb handle, and the upper blade and the lower blade are provided on the blade rest portion. The tin scissors according to claim 1, wherein the tin scissors are detachably fixed in respective predetermined postures. 3. The entire surface of the upper and lower blades is formed into a fine wave-processed surface having valleys and peaks that are substantially orthogonal or have an inclined shape close to that of the blade, and the blade line is also formed by abrasion of the blades. The tin plate scissors according to claim 1 or 2, wherein a fine saw blade shape appears.