Cutting jig for belt-like steel plate, automatic scissors for belt-like steel plate and cutting method for belt-like steel plate

Abstract

To provide a cutting jig for a belt-like steel plate, automatic scissors for a belt-like steel plate and a cutting method for a belt-like steel plate which can secure safety of a worker and improve workability.SOLUTION: A cutting jig 10 according to an embodiment comprises automatic scissors 30 that cut a belt-like steel plate 2 using air or electricity as a power source, and a guiding member 20 that guides the automatic scissors 30 in a cutting direction. The automatic scissors 30 have a pair of an upper blade 31 and a lower blade 32, a main body part 34 storing a driving part 33 for driving the upper blade 31, to which the lower blade 32 is fixedly connected, an operating part 35 that performs operation of starting and operation of stopping cutting operation, and a trunk part 36 connecting the main body part 34 to the operating part 35. The guiding member 20 is arranged below the belt-like steel plate 2, where a groove part 21 into which the lower blade 32 of the automatic scissors 30 is slidably inserted is formed on an upper surface thereof at the belt-like steel plate 2.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] Embodiments of the present invention relate to a cutting jig for a strip steel plate, an automatic scissors for a strip steel plate, and a method for cutting a strip steel plate.

Background Art

[0002] The stator core and rotor core of a rotating electrical machine are formed by punching a strip steel plate in a so-called progressive die manner in order to efficiently mass-produce them. In recent years, in order to improve the efficiency of rotating electrical machines, the strip steel plate has been made thinner, and in order to perform so-called multi-row punching to increase the utilization rate of the strip steel plate as a material and improve productivity, the strip steel plate has been made wider.

[0003] When such a strip steel plate needs to be cut for recovery from problems such as replacement or material clogging due to mis-punching, conventionally, an operator has manually cut the strip steel plate using scissors having a shape as described in Patent Document 1, for example.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, when the strip steel plate becomes wider, it may be difficult for the operator to reach or visually observe, and in that case, there is a risk that the hand or arm may come into contact with the cutting surface, so it has been necessary to ensure the safety of the operator. In addition, in order to cut a wide strip steel plate, it is necessary to repeat the operation of the scissors, and there is room for improvement in workability because the required number of cuts increases as the width increases.

[0006] Therefore, there is provided a cutting jig for a strip steel sheet, an automatic scissors for a strip steel sheet, and a method for cutting a strip steel sheet, which can ensure the safety of an operator and improve workability.

Means for Solving the Problems

[0007] The cutting jig for a strip steel sheet according to the embodiment includes an automatic scissors that cuts the strip steel sheet using air or electricity as a power source, and a guide member that guides the automatic scissors in the cutting direction. The automatic scissors include a pair of upper blades and lower blades, a main body portion in which a drive portion for driving the upper blade is accommodated and the lower blade is fixedly connected, an operation portion for performing a start operation and a stop operation of the cutting operation, and a body portion that connects between the main body portion and the operation portion. The guide member is disposed below the strip steel sheet, and a groove portion into which the lower blade of the automatic scissors is slidably inserted is formed on an upper surface on the strip steel sheet side. The lower blade is formed such that the cutting edge and the lower end are linear and parallel to the cutting direction, and in a state of being inserted into the groove portion, the cutting edge is formed in a shape positioned below the strip steel sheet. The main body portion is connected to the lower blade at a position where the whole is above the strip steel sheet in a state where the lower blade is inserted into the groove portion, and the long handle portion is formed longer than the width of the strip steel sheet.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

BEST MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, embodiments will be described with reference to the drawings. First, in order to facilitate understanding of the invention, an example of the equipment in which the cutting jig 10 (see FIG. 3) according to the present embodiment is used and the conventional problems will be described with reference to FIGS. 1 and 2. As shown in FIG. 1 as a front view of the equipment and a plan view of the equipment, the stator core and the rotor core of the rotating electrical machine are formed in a so-called progressive die type in which the strip steel plate 2 wound from the coil body 1 is arranged at a predetermined position by the leveler 3, passed through the press 4, and punched by the die 5 to continuously form the core pieces for the rotor and the stator.

[0010] In the present embodiment, a relatively thin strip steel plate 2 is used to increase the efficiency of the rotating electrical machine, and multi-row punching is performed to punch the core pieces in a two-row staggered arrangement in order to increase the utilization rate of the strip steel plate 2 and improve productivity. Therefore, the strip steel plate 2 is relatively wide. Hereinafter, the direction in which the strip steel plate 2 flows in the right direction in the drawing is referred to as the feeding direction, and the direction along the width of the strip steel plate 2 in the up-and-down direction in the drawing is referred to as the width direction.

[0011] Now, the strip steel plate 2 needs to be cut when, for example, it is replaced with another strip steel plate 2 having a different thickness or when so-called material clogging occurs due to a mis-punch. Conventionally, an operator has cut it manually. However, when the strip steel plate 2 becomes wide, it may be difficult for the operator to reach it or to visually observe it. In that case, since there is a risk that the hand or arm of the operator may come into contact with the cutting surface, it is necessary to ensure the safety of the operator. Further, since it is necessary to repeat the operation of the scissors to cut the wide strip steel plate 2, there is also room for improvement in workability.

[0012] Conventionally, a conventional scissors 100 with a curved lower end as shown in FIG. 2 as a conventional structural example has been used. Specifically, in the conventional scissors 100, a pair of conventional upper blades 101 and conventional lower blades 102 open and close to cut the strip steel plate 2, but the lower end of the conventional lower blade 102 is formed in a curved surface shape. Therefore, in the case of the conventional scissors 100, the angle and position at which the blade hits the strip steel plate 2 are likely to change, and it has been difficult to maintain the positional relationship between the blade tip and the strip steel plate 2.

[0013] In addition, since the cutting resistance changes when the positional relationship between the blade tip and the strip steel plate 2 changes, it has been difficult for the conventional scissors 100 to move straight and snake-like movement is likely to occur. As a result, as shown as the problem of linearity, the cutting position (P) indicated by the broken line may snake with respect to the cutting direction. Also, as shown as the problem of the cut surface, the shape of the cut surface of the strip steel plate 2 may differ depending on the cutting position.

[0014] In addition, as shown as the problems of inclination and height, when the strip steel plate 2 becomes wider, it is difficult to continuously hold the conventional scissors 100 at a certain angle (θ), and a certain height (H) is also required to hold that angle (θ). And the need for a certain height (H) has imposed restrictions on the working position where the strip steel plate 2 can be cut.

[0015] Specifically, when a mis-punch or material clogging occurs, it is necessary to once rewind the strip steel plate 2 in the direction opposite to the feeding direction. In order to simplify this operation and also to reduce the amount cut and discarded, it is desirable to cut the strip steel plate 2 as close as possible to the die 5. However, in the case of the conventional scissors 100, since a certain height is required, it has been physically difficult to cut the strip steel plate 2 at a position close to the die 5 inside the press machine 4.

[0016] In addition, cutting the strip steel plate 2 with a slitting device is difficult to introduce because the slitting die is expensive and a certain amount of installation space is required. There is also a problem that the installation location is fixed, resulting in a lack of versatility.

[0017] Therefore, in the present embodiment, by using the cutting jig 10 shown in FIG. 3, while ensuring the safety of the operator, the strip steel plate 2 can be cut linearly along the cutting direction, the cutting surface can be made uniform, and further, the strip steel plate 2 can be easily cut while suppressing the height required for the work. In the present embodiment, an example of cutting the strip steel plate 2 in the width direction is shown, so the cutting direction and the width direction coincide. However, the cutting direction is not limited to the width direction, and the cutting jig 10 can also be used when cutting obliquely with respect to the width direction.

[0018] The cutting jig 10 includes a guide member 20 disposed below the strip steel plate 2 and a pair of automatic scissors 30 guided in the cutting direction by the guide member 20. As shown in FIG. 4 as a shape diagram, the guide member 20 is generally columnar, and a groove portion 21 for guiding the pair of automatic scissors 30 is formed on the upper surface facing the strip steel plate 2. The groove portion 21 has a shape in which a flat bottom surface 22 and wall surfaces 23 rising from both sides of the bottom surface 22 are formed over the entire length (W1) of the guide member 20.

[0019] In addition, the entire length (W1) of the guide member 20 is formed to be longer than the width (W) of the strip steel plate 2. In the present embodiment, in a state where it is disposed below the strip steel plate 2, it is set so that predetermined lengths (W2, W3) protrude outward from both ends in the width direction of the strip steel plate 2. The protruding lengths (W2, W3) are set according to the shape of the pair of automatic scissors 30 as described later, but they may be the same.

[0020] Further, the guide member 20 is disposed between rollers for feeding a steel plate (not shown). Therefore, the height (H1) of the guide member 20 is set to a value that does not contact the strip steel plate 2 when disposed below the strip steel plate 2, and the depth (D1) of the guide member 20 is also set to a value that can be installed below the strip steel plate 2. Further, the guide member 20 can be disposed or moved to any location as long as it is parallel to the strip steel plate 2.

[0021] Further, the height (H2) and width (D2) of the groove portion 21 are set according to the shape of the automatic scissors 30, as will be described later. Since the guide member 20 has a simple structure and can be manufactured relatively inexpensively, a plurality of types can be prepared and used properly according to the width of the strip steel plate 2 and the structure of the equipment.

[0022] As shown in FIG. 5, the automatic scissors 30 includes a pair of upper blades 31 and lower blades 32, a main body portion 34 that houses a drive unit 33 for driving the upper blade 31 and to which the lower blade 32 is fixedly connected, an operation unit 35 that performs a cutting start operation and a stop operation, and a body portion 34 and the operation unit 35. It has a body portion 36 that connects between. When the trigger 35a is pulled, the upper blade 31 rotates about a fulcrum to start a cutting operation for cutting the strip steel plate 2, and when the trigger 35a is released, the cutting operation ends. However, the configuration of the operation unit 35 is not limited to this.

[0023] The total length (W10) of the main body portion 34 and the body portion 36 is formed to be at least longer than the width (W) of the strip steel plate 2. Therefore, during the period from the start to the completion of the cutting of the strip steel plate 2, the operation unit 35 does not reach the strip steel plate 2, and it is possible to prevent the hands and arms of the operator from contacting the strip steel plate 2 during the cutting operation.

[0024] The upper blade 31 and the lower blade 32 are provided so as to protrude by a predetermined length (W11) from the tip of the main body portion 34. And the lengths (W2, W3) by which the guide member 20 protrudes from the strip steel plate 2 are formed to be longer than the length (W11) of the upper blade 31 and the lower blade 32. Thereby, when cutting the strip steel plate 2, it is possible to start the cutting operation in a state where the lower blade 32 is inserted into the groove portion 21 on the side of the strip steel plate 2, that is, in a state where the position of the automatic scissors 30 is stable. Note that the lengths (W2, W3) by which the guide member 20 protrudes may be a length at which at least a part of the lower blade 32 can be inserted when starting the cutting, for example, it can be set to be equal to or greater than the length (W13) of the lower end 32b of the lower blade 32.

[0025] The body portion 36 is generally formed in a hollow cylindrical shape, and a laying member 37 for transmitting air, electricity, or an operation signal to the drive portion 33 is passed through the inside thereof. The lower surface of the lower end shown in the figure on the strip steel plate 2 side of this body portion 36 has a shape that generally coincides with the lower surface of the main body portion 34. However, in this embodiment, the lower surface of the main body portion 34 is located slightly lower, and the lower surface of the main body portion 34 is the lowermost end within the range of the main body portion 34 and the body portion 36.

[0026] Also, as shown enlarged in FIG. 6, the main body portion 34 is connected to the lower blade 32 so that the whole is offset upward from the strip steel plate 2 in a state where the lower blade 32 is inserted into the groove portion 21. That is, the distance (H11) between the lower surface of the main body portion 34 and the lower end of the lower blade 32 is set to be larger than the distance (H12) to the upper surface of the strip steel plate 2 at the time of cutting. And in this embodiment, since the lower surface of the main body portion 34 is the lowermost end, the automatic scissors 30 cuts the strip steel plate 2 in a state where the lower blade 32 is slidably supported by the groove portion 21 and the main body portion 34 and the body portion 36 always move above the strip steel plate 2.

[0027] The lower blade 32 is formed in a linear shape such that the cutting edge 32a and the lower end 32b are parallel to the cutting direction when viewed from the side, and is formed in a shape such that the cutting edge 32a is positioned below the strip steel plate 2 when inserted into the groove portion 21. Further, the height (H2) of the groove portion 21 is set so that the cutting edge 32a does not reach the strip steel plate 2 when the lower blade 32 is inserted into the groove portion 21.

[0028] Further, during cutting, the lower blade 32 moves while sliding on the bottom surface 22 within the groove portion 21 in a state where the lower end 32b is supported by the groove portion 21 and both sides are sandwiched between the wall surfaces 23. As a result, when the lower blade 32 is inserted into the groove portion 21, it is possible to make the distance between the cutting edge 32a and the strip steel plate 2, the angle and position at which the upper blade 31 contacts the strip steel plate 2, constant during cutting. And since the cutting mode when cutting the strip steel plate 2 is always constant, the cutting resistance does not change, and it becomes easier to move straight in the cutting direction.

[0029] Also, during cutting, the lower blade 32 is in a state where a predetermined length (W12) is sandwiched between the wall surfaces 23 of the groove portion 21. For this reason, even if the lower blade 32 is inclined in the vertical direction in a plan view along line A-A, the range of the inclination is limited by the wall surfaces 23 of the groove portion 21. Therefore, by cutting with the lower blade 32 inserted into the groove portion 21, the center line (CL1) of the lower blade 32 in the cutting direction coincides with the cutting direction, and the cutting position is suppressed from meandering.

[0030] Further, the lower blade 32 with a flat lower end 32b contacts the groove portion 21 over the entire length (W13) of the lower end 32b. And in an actual test using the automatic scissors 30, it has been found that there is a significant difference in the operating feeling felt by the operator during cutting between a state where the entire length (W13) of the lower blade 32 is in contact with the groove portion 21 and a state where the lower blade 32 is inclined and in contact with the groove portion 21 at a single point, for example. That is, by making the lower end 32b flat, not only does the cutting mode always remain constant, but it also becomes possible for the operator during the cutting operation to grasp whether the lower blade 32 is horizontal, that is, whether the cutting mode is changing, based on their own operating feeling.

[0031] And, by enabling the operator to determine whether or not the lower blade 32 is horizontal, it is possible to prevent the cutting edge 32a from tilting vertically with respect to the cutting direction. Further, in the present embodiment, the tip of the lower blade 32 in the cutting direction is chamfered, and both end sides in the thickness direction are also chamfered as shown in a plan view taken along line A-A. Therefore, the possibility that the lower blade 32 gets caught in the groove portion 21 is reduced, and since it becomes easier to slide, it is expected that the operating feeling can be easily grasped and the tilt can be further suppressed.

[0032] Further, as shown in FIG. 7 viewed from the cutting direction, the lower blade 32 cuts the strip steel plate 2 while being sandwiched between groove portions 21 having a predetermined width (D1). At this time, the width (D1) of the groove portion 21 is set to be slightly larger than the thickness (D11) of the lower blade 32. In the case of the present embodiment, the width (D1) of the groove portion 21 is set to a value that forms a gap of about 0.1 to 0.8 mm between the lower blade 32. Further, the height (H2) of the groove portion 21 is set so as to cover approximately one-third or more of the side surface of the lower blade 32 in a state where the lower blade 32 is inserted into the groove portion 21.

[0033] Thereby, even if the lower blade 32 tilts in the left-right direction in the drawing, the range of the tilt is restricted by the wall surface 23, and it becomes possible to cut with the center line (CL2) of the lower blade 32 in the up-down direction in the drawing being substantially perpendicular to the strip steel plate 2, and the cut surface can be made uniform regardless of the cutting position.

[0034] In this way, by using the automatic scissors 30 and the guide member 20, as shown in FIG. 3, the step of arranging the guide member 20 below the strip steel plate 2 with the groove portion 21 along the cutting direction, and the step of starting the cutting operation with the lower blade 32 of the automatic scissors 30 inserted into the groove portion 21 from the left side in the drawing and cutting the strip steel plate 2 are carried out. As a result, it becomes possible to cut the strip steel plate 2 linearly along the cutting direction and without changing the cutting state at each cutting position.

[0035] According to the embodiment described above, the following effects can be obtained. The cutting jig 10 for the strip steel plate 2 includes an automatic scissors 30 that cuts the strip steel plate 2 using air or electricity as a power source, and a guiding member 20 that guides the automatic scissors 30 in the cutting direction. The automatic scissors 30 includes a pair of upper blades 31 and lower blades 32, a main body portion 34 that houses a driving portion 33 for driving the upper blade 31 and to which the lower blade 32 is fixedly connected, an operation portion 35 that performs a start operation and a stop operation of the cutting operation, and a body portion 36 that connects between the main body portion 34 and the operation portion 35. Further, the guiding member 20 is disposed below the strip steel plate 2, and a groove portion 21 into which the lower blade 32 of the automatic scissors 30 is slidably inserted is formed on the upper surface on the strip steel plate 2 side.

[0036] And, the lower blade 32 is formed such that the cutting edge 32a and the lower end 32b are linear and parallel to the cutting direction, and in a state where it is inserted into the groove portion 21, the cutting edge 32a is formed in a shape positioned below the strip steel plate 2. The main body portion 34 is connected to the lower blade 32 at a position where the whole is above the strip steel plate 2 in a state where the lower blade 32 is inserted into the groove portion 21, and the long handle portion is formed longer than the width of the strip steel plate 2.

[0037] Thereby, while maintaining a parallel positional relationship between the lower blade 32 and the main body portion 34 and the strip steel plate 2, since the main body portion 34 is offset upward with respect to the strip steel plate 2, movement is not hindered, and the lower blade 32 slides in the groove portion 21, so that inclination with respect to the cutting direction and the vertical direction is suppressed, and the strip steel plate 2 can be cut while maintaining the angular relationship during cutting. That is, the automatic scissors 30 can be guided in a state where the cutting edge is perpendicular and horizontal with respect to the strip steel plate 2. Therefore, variations in the cutting angle are less likely to occur, the cutting resistance is less likely to change, the cutting position can be made linear, and the cut surface can also be made uniform.

[0038] Furthermore, by making the body portion 36 longer than the width of the strip steel plate 2, workers cannot touch the cutting location of the strip steel plate 2, enabling safe operation. Also, even when the tip of the automatic scissors 30 is far from the worker, it can be cut linearly because it is guided by the groove portion 21. Moreover, since it is driven by air or electricity, it is possible to cut at low cost while reducing the burden on the worker, and expensive equipment such as a shear die and installation space are not required. Therefore, the safety of the worker can be ensured and workability can be improved.

[0039] In addition, the guide member 20 is formed such that its total length (W10) is longer than the width (W) of the strip steel plate 2, and in a state where it is disposed below the strip steel plate 2, it protrudes from both end portions in the width direction of the strip steel plate 2. Thereby, in a state where the lower blade 32 is inserted into the groove portion 21 of the guide member 20, that is, the cutting can be started from a state where the automatic scissors 30 are supported by the guide member 20 and are stable.

[0040] The automatic scissors 30 are for cutting the strip steel plate 2, and include a pair of upper blades 31 and a lower blade 32, a drive unit 33 that drives the upper blade 31 using air or electricity as a power source, a main body portion 34 to which the lower blade 32 is fixedly connected, an operation unit 35 that performs start and stop operations of the cutting operation, and a body portion 34 and an operation unit 35. And a body portion 36 connecting them. The lower blade 32, the main body portion 34, and the body portion 36 have the same configuration as the above-described cutting jig 10. With such an automatic scissors 30, various effects similar to those of the cutting jig 10 can be obtained, such as ensuring the safety of the worker and improving workability.

[0041] Also, in a method of cutting the strip steel sheet 2, an automatic scissors 30 having a pair of upper blades 31 and lower blades 32 that cut the strip steel sheet 2 using air or electricity as a power source, and a guide member 20 disposed below the strip steel sheet 2 and having a groove portion 21 that guides the automatic scissors 30 along the cutting direction are used. A step of disposing the guide member 20 below the strip steel sheet 2 with the groove portion 21 along the cutting direction, and a step of starting a cutting operation with the lower blade 32 of the automatic scissors 30 inserted into the groove portion 21 to cut the strip steel sheet 2. By such a method of cutting the strip steel sheet 2, the safety of the operator can be ensured and the workability can be improved, and various effects similar to those of the cutting jig 10 can be obtained.

[0042] By the way, as the strip steel sheet 2 becomes wider and the body portion 36 becomes longer, a load is applied to the tip of the automatic scissors 30. Therefore, for example, as shown in FIG. 8 as another configuration example No. 1, a lower surface side protrusion 38 having a shape protruding downward and the position of the lower end coinciding with the lower end 32b of the lower blade 32 can be provided on the lower surfaces of the main body portion 34 and the body portion 36. As shown in the cross-sectional view taken along line B-B, the lower surface side protrusion 38 is inserted into the groove portion 21 during cutting, and together with the lower blade 32, holds the automatic scissors 30 in a horizontal state, that is, parallel to the strip steel sheet 2. Thereby, the load does not concentrate on the tip portion, and the main body portion 34 and the body portion 36 can be easily maintained horizontally with respect to the strip steel sheet 2 and cut.

[0043] Also, as shown as another configuration example No. 2, a configuration can be adopted in which lower surface side protrusions 38 are provided on the main body portion 34 and the body portion 36, respectively. Alternatively, although not shown, a configuration can be adopted in which the lower surface side protrusion 38 is provided only on the main body portion 34 or only on the body portion 36. Even with such a configuration, the automatic scissors 30 can be kept horizontal.

[0044] In the case of the automatic scissors 30, it is conceivable that the lower blade 32 floats when the strip steel plate 2 is cut. Therefore, for example, as shown in FIG. 9 as another shape example No. 3, a side surface side protrusion 39 having a shape protruding from the side surface is provided on at least one side surface of the lower blade 32 of the automatic scissors 30, and as shown in the cross-sectional view taken along the line C-C, on the wall surface 23 facing the side surface side protrusion 39 in the groove portion 21 of the guide member 20, a housing portion 24 is formed so as to be recessed inward from the side surface and house at least a part of the side surface side protrusion 39. In FIG. 9, side surface side protrusions 39 are provided on both side surfaces of the lower blade 32, but it is also possible to adopt a configuration in which they are provided on only one of them.

[0045] Thereby, the vertical movement of the lower blade 32 is physically restricted, and cutting can be performed within a predetermined range in the vertical direction. Further, when the side surface side protrusion 39 is provided, since the automatic scissors 30 can be removed from the guide member 20 by pulling it out along the groove portion 21 after cutting the strip steel plate 2, it is possible to suppress the occurrence of operation errors such as accidentally lifting the automatic scissors 30 after cutting and dropping it onto the strip steel plate 2. Further, a plurality of side surface side protrusions 39 can be provided on one side surface of the lower blade 32, or a protrusion similar to the side surface side protrusion 39 can be provided on the side surface of the lower surface side protrusion 38 described above.

[0046] In the embodiment, a shape example in which the groove portion 21 is connected to both ends of the guide member 20 in the cutting direction is shown, but if the lower blade 32 can be inserted, it can be a shape that is not connected to one or both ends. For example, by adopting a shape that is connected to the end on the side where cutting starts and not connected to the end on the side where cutting ends, it is possible to prevent the automatic scissors 30 from being pushed too much and coming off the guide member 20 after cutting the strip steel plate 2.

[0047] In the embodiment, an example of a usage form was illustrated in which the guide member 20 was arranged along the width direction of the strip steel plate 2, and the strip steel plate 2 was cut at a right angle to the width direction, that is, the feed direction. However, the guide member 20 can also be arranged slightly obliquely with respect to the width direction. That is, the arrangement mode of the guide member 20 is not limited to that illustrated in the embodiment, and it can be arranged in the direction in which it is desired to cut.

[0048] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalent scope thereof.

Explanation of Reference Numerals

[0049] In the drawings, 2 is a strip steel plate, 10 is a cutting jig, 20 is a guide member, 21 is a groove portion, 24 is a housing portion, 30 is an automatic scissors, 31 is an upper blade, 32 is a lower blade, 32a is a blade tip, 32b is a lower end, 33 is a drive portion, 34 is a main body portion, 35 is an operation portion, 36 is a body portion, 38 is a lower surface side protrusion, and 39 is a side surface side protrusion.

Claims

1. An automatic scissors that cuts a strip steel plate using air or electricity as a power source, and a guiding member that guides the automatic scissors in the cutting direction, wherein the automatic scissors includes a pair of upper blades and lower blades, a main body that houses a driving unit for driving the upper blade and to which the lower blade is fixedly connected, an operation unit that performs a start operation and a stop operation of the cutting operation, and a body part that connects between the main body and the operation unit, the guiding member is disposed below the strip steel plate, and a groove portion into which the lower blade of the automatic scissors is slidably inserted is formed on an upper surface on the strip steel plate side, the lower blade is formed such that a blade tip and a lower end are in a straight line parallel to the cutting direction, and in a state of being inserted into the groove portion, the blade tip is formed in a shape positioned below the strip steel plate, the main body is connected to the lower blade at a position where the whole is above the strip steel plate in a state where the lower blade is inserted into the groove portion, the long handle portion is a cutting jig for a strip steel plate formed longer than the width of the strip steel plate.

2. The cutting jig for a strip steel plate according to claim 1, wherein the automatic scissors is provided with a lower surface side protrusion portion that protrudes downward and is insertable into the groove portion on at least one of a lower surface side of the main body or the body part.

3. The automatic scissors is provided with a side surface side protrusion portion that protrudes from at least one side surface of the lower blade, and the guiding member is provided with a housing portion that houses at least a part of the side surface side protrusion portion on a wall surface facing the side surface side protrusion portion in the groove portion. The cutting jig for a strip steel plate according to claim 1.

4. The guiding member according to claim 1, wherein the entire length is longer than the width of the strip steel plate, and is formed to have a length that protrudes from an end portion of the strip steel plate in a state of being disposed below the strip steel plate.

5. Scissors for cutting a strip steel plate, comprising a pair of upper blades and lower blades, a main body that houses a driving unit for driving the upper blade using air or electricity as a power source and to which the lower blade is fixedly connected, an operation unit that performs a start operation and a stop operation of the cutting operation, and a body part that connects between the main body and the operation unit. The lower blade is formed in a linear shape with its lower end and cutting edge parallel to the cutting direction, and is formed in a shape such that the cutting edge is positioned below the strip steel plate when inserted into the groove portion of a guide member disposed below the strip steel plate. The main body portion is connected to the lower blade at a position where the whole is above the strip steel plate when the lower blade is inserted into the groove portion during cutting. The long handle portion is an automatic scissors for strip steel plates formed longer than the width of the strip steel plate.

6. A method for cutting a strip steel plate, comprising: using an automatic scissors having a pair of upper and lower blades for cutting the strip steel plate with air or electricity as a power source, and a guide member disposed below the strip steel plate and having a groove portion for guiding the automatic scissors along the cutting direction; a step of disposing the guide member below the strip steel plate with the groove portion along the cutting direction; a step of starting a cutting operation with the lower blade of the automatic scissors inserted into the groove portion to cut the strip steel plate; A method for cutting a strip steel plate including the above steps.

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