JP2009113124A - Angle cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an angle cutting device increased in shearing force without increasing a pressing force output from a pressing device. <P>SOLUTION: A recessed groove 16b is formed in each of a pair of end surfaces 16a of a second cutter 16 along the longitudinal direction of the end surface 16a. Since the area of each of the pair of end surfaces 16a of the second cutter 16 on an angle 24 is reduced, and the pressing force is concentrated on the side edge part of the end surface 16a, the angle 24 can be cut with a considerably smaller pressing force than in the case where the pair of end surfaces 16a are formed of respective flat surfaces when the thicknesses of the angles 24 are the same. Namely, even if the pressing force output from the hydraulic pressing device is not increased, the shearing force of the angle cutting device can be increased. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an angle material cutting device for cutting a longitudinal angle material having a chevron-shaped cross section.

As shown in Patent Document 1, an angle material cutting device is a pair of (a) an angle material, such as an equilateral angle steel, for receiving a pair of outer surfaces of a long angle material having an angled cross section such as an L shape. A first mold having a receiving surface and a pair of receiving surfaces and a longitudinal opening continuous in a direction perpendicular to the longitudinal direction of the angle member; and (b) a pair of inner surfaces of the angle member. A plate-like second mold having a pair of tip surfaces and provided so as to be fitted into the opening of the first mold; and (c) a pressing device for pressing the second mold toward the first mold. And (d) the angle material by pushing the second mold into the opening of the first mold with the angle material inserted between the first mold and the second mold. Is to cut.
Japanese Patent Laid-Open No. 10-225816

  By the way, in the angle material cutting device, the pair of tip surfaces of the second mold is flat. Therefore, in order to improve the shearing force for cutting the angle material, the output of the pressing device is increased to increase the second force. There is a problem that the force for pressing the mold has to be increased, and depending on the maximum output of the pressing device, the angle material cannot be cut depending on the material of the angle material or its thickness.

  The present invention has been made against the background of the above circumstances, and its object is to provide an angle material capable of improving the shear force of the angle material cutting device without increasing the pressing force output from the pressing device. To provide a cutting device.

  The gist of the invention according to claim 1 for achieving this object is as follows: (a) a pair of receiving surfaces for receiving a pair of outer surfaces of the angle member and a longitudinal direction of the angle member at the pair of receiving surfaces; A first mold having a longitudinal opening continuous in an orthogonal direction; and (b) a pair of tip surfaces opposed to a pair of inner surfaces of the angle member, and fitted into the opening of the first mold. A plate-like second mold provided so as to be able to be inserted; and (c) a pressing device that presses the second mold toward the first mold, and (d) the first mold and the second mold. In an angle material cutting device for cutting an angle material by pushing the second mold into an opening of the first mold with the angle material inserted between the two, (e) a pair of tip surfaces of the second mold In the above, a concave groove is provided along the longitudinal direction of the tip surface.

  The invention according to claim 2 is the invention according to claim 1, wherein, in the pair of tip surfaces of the second mold, a pair of pressing planes is provided between the pair of side edges of the tip surface and the concave groove. It is formed.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, an engagement recess is formed on each of the pair of tip surfaces of the second mold to engage with an end in the width direction of the angle member. It is characterized by being.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein an angle between the pair of tip surfaces of the second mold is a pair of outer surfaces in a cross section of the angle member. Or it is set larger than the angle of an inner surface.

  According to the angle member cutting device of the invention of claim 1, (a) a pair of receiving surfaces that receive a pair of outer surfaces of the angle member and a pair of receiving surfaces that are continuous in a direction orthogonal to the longitudinal direction of the angle member. A first mold having a longitudinal opening, and (b) a pair of tip surfaces opposed to the pair of inner surfaces of the angle member, respectively, so as to be fitted into the opening of the first mold. A plate-shaped second mold, and (c) a pressing device that presses the second mold toward the first mold, and (d) an angle member is provided between the first mold and the second mold. In an angle material cutting device that cuts the angle material by pushing the second mold into the opening of the first mold in the inserted state, (e) the front end surface of the pair of front end surfaces of the second mold Since a concave groove is provided along the longitudinal direction, of the pair of tip surfaces of the second mold Since the pressing area against the single material is reduced and the pressing force concentrates on the side edge of the tip surface, the angle material with the same thickness is used compared to the case where the pair of tip surfaces are each composed of a flat surface. If there is, the angle material can be cut with a relatively small pressing force. That is, the shearing force of the angle material cutting device can be improved without increasing the pressing force output from the pressing device.

  According to the angle member cutting device of the invention of claim 2, a pair of pressing planes are formed between the pair of side edges of the tip surface and the concave groove in the pair of tip surfaces of the second mold. Therefore, the strength of the pair of side edge portions of the tip surface functioning as a cutting blade is increased, so that damage is prevented and durability is enhanced.

  In addition, according to the angle member cutting device of the invention according to claim 3, each of the pair of distal end surfaces of the second mold is formed with an engaging recess that engages with an end portion in the width direction of the angle member. As a result, even if the angle member is displaced during the pressing of the second mold, the angle member is returned to the center by engaging one of the engagement recesses with the end of the angle member in the width direction. , Stable cutting becomes possible.

  According to the angle member cutting device of the invention according to claim 4, the angle between the pair of tip surfaces of the second mold is larger than the angle between the pair of outer surfaces or inner surfaces in the cross section of the angle member. Since the cutting is started first from the end in the width direction of the angle material, and then the cutting is continuously performed toward the central portion in the width direction of the angle material, the relatively small pressing device Angle material can be cut by pressing force. Therefore, when the first type and the second type are used as the attachment of the portable hydraulic actuator, the cutting function is enhanced.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following embodiments, the drawings are simplified, and the dimensions and the like of each part are not necessarily drawn accurately.

  FIG. 1 is an overall view of a portable angle member cutting apparatus 10 according to an embodiment of the present invention. The angle material cutting device 10 includes an angle material cutting mechanism 18 including a pair of first cutters (first type) 12 and 14 and a second cutter (second type) 16 and a pressing member 20 that is moved by a switch operation. And a hydraulic pressing device (pressing device) 22 that presses the second cutter 16 toward the pair of first cutters 12, 14, and the pair of first cutters 12 is operated by a switch operation of the hydraulic pressing device 22. , 14 and the second cutter 16 are angle members 24 disposed between the pair of first cutters 12, 14 and the second cutter 16 and cut. The angle material cutting device 10 is provided with a pair of substantially cylindrical mounting pins 26, and a hydraulic pressing device 22 is attached to the angle material cutting mechanism 18 by the pair of mounting pins 26. The hydraulic pressing device 22 can be removed from the angle member cutting mechanism 18 by being removed.

  FIG. 2 is an enlarged view of the angle material cutting mechanism 18 of the angle material cutting device 10. The angle material cutting mechanism 18 fixes a pair of first cutters 12 and 14 spaced by a distance corresponding to the thickness dimension of the second cutter 16 in the thickness direction by a plurality of (12 in this embodiment) set bolts 28. A pair of flat plate-like first cutter frames 30 and 32 and a second cutter 16 are attached so as to be movable in the direction in which the pressing member 20 moves by the switch operation of the hydraulic pressing device 22, that is, in the moving direction 34 in FIG. The cutter frame 36 is configured.

  In addition, as shown in FIG. 2, the pair of first cutters 12 and 14 respectively form a pair of outer side surfaces 24a of a long angle member 24 having an angled cross-sectional shape such as an L shape, like an equilateral mountain shape rope. Each of the pair of receiving surfaces 12a and 14a has an angle R1 between the pair of receiving surfaces 12a and 14a of the pair of first cutters 12 and 14, and the angle R1 of the pair of outer surfaces 24a of the angle member 24 It is the same as the angle between each other, and is set to about 90 ° in this embodiment. As shown in FIG. 2, the second cutter 16 has a pair of tip surfaces 16 a that respectively oppose the pair of inner side surfaces 24 b of the angle member 24, and the pair of tip surfaces 16 a of the second cutter 16. Is larger than the angle between the pair of outer side surfaces 24a or the pair of inner side surfaces 24b of the angle member 24, and is set to about 118 ° in this embodiment. 2 indicates the moving direction 34 of the pressing member 20, that is, the pressing direction of the hydraulic pressing device 22, and divides the angle R2 between the pair of tip surfaces 16a of the second cutter 16 into two equal parts. Is.

  3 and 4 are perspective views for explaining the configuration of the angle member cutting mechanism 18. 3 and 4, the pair of first cutter frames so that the distance L1 between the pair of first cutters 12, 14 in the thickness direction of the first cutters 12, 14 is slightly larger than the thickness L2 of the second cutter. A pair of flat spacers 40 is interposed between the pair of first cutter frames 30 and 32 and the pair of spacers 40 (six in this embodiment). It is fixed by a frame fixing bolt 42. With the pair of spacers 40, the pair of receiving surfaces 12 a, 14 a of the pair of first cutters 12, 14 can be fitted with the second cutter 16 in a direction orthogonal to the longitudinal direction of the angle member 24, and A longitudinal opening 44 having a width dimension corresponding to the distance L1 is provided.

  As shown in FIGS. 3 and 4, the angle member cutting mechanism 18 is provided with a pair of substantially cylindrical mounting pins 46, and a pair of first cutter frames 30, 32 and the second cutter frame 36 are attached to each other, and by removing the pair of attachment pins 46, the pair of first cutter frames 30 and 20 and the second cutter frame 36 can be removed from each other. Yes. In addition, when the pair of first cutter frames 30 and 32 and the second cutter frame 36 are attached by the attachment pins 46, the second cutter 16 is connected to the second cutter frame 36 from the ends of the pair of first cutters 12 and 14. It is arrange | positioned between a pair of guide parts 12b and 14b extended to the side, and the rotation of the pressing member 20 around the moving direction 34 is impossiblely held by the pair of guide parts 12b and 14b. In addition, when the second cutter 16 is moved to the pair of first cutters 12 and 14 by the pressing force of the hydraulic pressing device 22, the second cutter 16 is guided to the pair of guide portions 12b and 14b, thereby causing a pair of first cutters 12b and 14b to move. The cutters 12 and 14 can be fitted into openings 44 provided in the receiving surfaces 12a and 14a.

  As shown in FIGS. 5 and 6, the second cutter frame 36 includes a stepped through hole 46 that penetrates in a substantially cylindrical shape in the pressing direction of the hydraulic pressing device 22, that is, the moving direction 34 of the pressing member 20. The compression spring 48 disposed in a compressed state in the large-diameter portion of the through hole 46 is fitted into the axial direction of the through hole 46 so as to be slidable and movable in the moving direction 34 of the pressing member 20. A substantially cylindrical moving member 50, a fixing portion 50 a that is formed at the shaft end of the moving member 50, holds the second cutter 16, and fixes the second cutter 16 with a pair of fixing bolts 51, and a set bolt 52. Is provided with a guide cap 54 that is fixed to the moving member 50. When the pressing member 20 moves in the moving direction 34 by the pressing force of the hydraulic pressing device 22, the moving member 50 is moved via the guide cap 54. 0 That is, the second cutter 16 is moved to the first cutter 12, 14 against the urging force of the compression spring 48. When the pressing force of the hydraulic pressing device 22 is released, the second cutter 16, that is, the moving member 50 is moved away from the first cutters 12 and 14 according to the urging force of the compression spring 48 through the guide cap 54. The fixed portion 50a comes into contact with the peripheral portion of the through hole 46 and returns to the position shown in FIG.

  Further, as shown in FIGS. 5 and 6, the moving member 50 is provided with a longitudinal guide groove 50b dug in the moving direction 34 of the pressing member 20, and the guide groove 50b includes a first guide groove 50b. 2 Since the distal end portion 56a of the guide screw 56 fixed to the cutter frame 36 is fitted, the moving member 50 is prevented from rotating around the moving direction 34 of the pressing member 20, and the retaining bolt 52 is removed to When the compression spring 48 is taken out from the two cutter frame 36, the moving member 50 and the second cutter 16 are prevented from falling from the second cutter frame 36.

  As shown in FIG. 7, the pair of distal end surfaces 16a of the second cutter 16 is provided with a concave groove 16b along the longitudinal direction of the pair of distal end surfaces 16a in the intermediate portion in the width direction of the distal end surface 16a. A pair of flat pressing planes 16c continuous along the longitudinal direction of the distal end surface 16a is formed between both side edges of the distal end surface 16a and the groove 16b. By forming the pair of pressing planes 16c between the both side edges of the pair of tip surfaces 16a and the concave groove 16b, the strength of the side edges of the tip surface 16a functioning as a cutting blade is suitably increased, and the second cutter 16 is prevented from being damaged, and the durability of the second cutter 16 is enhanced. Further, by arranging the concave groove 16b in the intermediate portion in the width direction of the tip surface 16a, the width of the pair of pressing planes 16c can be made constant, and the strength of the pair of pressing planes 16c of the second cutter 16 is made constant. Can be. In addition, an engagement recess 16 d that engages with the end 24 c of the angle member 24 is formed in each of the pair of tip surfaces 16 a of the second cutter 16.

  Returning to FIG. 1, the hydraulic pressing device 22 includes a power cord 58 connected to an outlet, a grip 60 gripped by one hand, and a hydraulic pressure only while a switch 62 provided on the grip 60 is pushed. The hydraulic pump driving electric motor 64 for driving the hydraulic pump disposed in the pressure pressing device 22, the gear mechanism for transmitting the rotational force of the electric motor 64, and the hydraulic pump and valves and the oil tank are accommodated. 66, a hydraulic cylinder 70 to which the hydraulic pressure output from the hydraulic pump is supplied, and the hydraulic cylinder 70 is provided with the hydraulic pressure supplied to the pressurizing chamber of the hydraulic cylinder 70. The pressing member 20 that moves through a piston and a piston rod is integrally provided, and the switch 62 is pushed in. When the electric motor 64 is operated to operate, the hydraulic oil in the oil tank 66 is pumped by the hydraulic pump and supplied to the pressurizing chamber in the hydraulic cylinder 70 through the oil passage, so that the piston is It is moved against the urging force of a return spring (not shown) disposed in the hydraulic cylinder 70, and the pressing member 20 moves in the moving direction 34 through the piston rod to push out the moving member 50. Further, when the pushing operation of the switch 62 is released to stop the electric motor 64 and the return lever 72 is pushed, the piston is pushed back according to the urging force of the return spring, and the pushing member is pushed via the piston rod. 20 is drawn in the direction opposite to the moving direction 34 and the hydraulic oil in the pressurized chamber is returned to the oil tank 66 through a valve (not shown) provided in the housing 68.

  As shown in FIG. 8, the angle material cutting device 10 configured as described above includes an angle material 24 disposed on the pair of receiving surfaces 12 a and 14 a of the pair of first cutters 12 and 14, and the hydraulic pressing device 22. When the switch 62 is pushed, the pressing member 20 moves in the moving direction 34, and the moving member 50 and the second cutter 16 are moved in the moving direction 34 against the urging force of the compression spring 48. The pair of tip surfaces 16 a of the two cutters 16 press the pair of inner side surfaces 24 b of the angle member 24. Further, when the second cutter 16 presses the angle member 24, for example, if the angle member 24 is displaced, the pair of engaging recesses 16d provided on the pair of distal end surfaces 16a causes the end portions of the angle member 24 in the width direction. The angle member 24 is returned to the center by coming into contact with one of the 24c. That is, even if the angle member 24 is displaced at the time of cutting, the pair of engaging recesses 16d of the second cutter can suppress the displacement of the angle member 24 and can cut the angle member 24 in a stable state.

  FIGS. 9 and 10 are views showing a state in which the pair of distal end surfaces 16 a of the second cutter 16 press the pair of inner side surfaces 24 b of the ankle material 24. According to FIGS. 9 and 10, the pair of distal end surfaces 16a including the pair of pressing planes 16c is an angle member as compared with the distal end surface 16a of the conventional second cutter 16 in which the distal end surface 16a indicated by the one-dot chain line 74 in FIG. Since the pressing area for pressing 24 is small and the pressing force output from the hydraulic pressing device 22 can be concentrated on both side edges of the pair of tip surfaces 16a, the second cutter 16 and the pair of first cutters 12, 14, a greater shearing force than that of the conventional second cutter is generated. Therefore, the second cutter 16 and the pair of first cutters 12 and 14 are smaller than the angle material cutting device in which the second cutter having a flat tip surface 16a is used as long as the angle material 24 has the same thickness. The angle member 24 can be cut by the pressing force of the pressing device 22 and the sharpness is enhanced. That is, by using the second cutter 16 having a pair of pressing planes 16c, the shear force of the angle material cutting device 10 can be improved without increasing the pressing force output from the hydraulic pressing device 22.

  Furthermore, the angle R2 between the pair of tip surfaces 16a of the second cutter 16 is set to be larger than the angle between the pair of outer surfaces 24a or inner surfaces 24b in the cross section of the angle member 24. When the material 24 is cut by the second cutter 16 and the pair of first cutters 12, 14, the angle material 24 starts to be cut first from the end 24 c in the width direction of the angle material 24, and then the angle material 24 Since the cutting is continuously performed toward the central portion in the width direction, the pressing area between the pair of pressing planes 16c, that is, the pair of distal end surfaces 16a and the angle member 24 can be further reduced, and a relatively small hydraulic pressing The angle member 24 can be cut by the pressing force of the device 22. Therefore, when the 1st cutter 16 and the 2nd cutters 12 and 14 are utilized as an attachment of a portable hydraulic actuator, the cutting function is improved.

  According to the angle member cutting apparatus 10 of the present embodiment, (a) a pair of receiving surfaces 12a and 14a for receiving a pair of outer surfaces 24a of the angle member 24 and the longitudinal length of the angle member 24 at the pair of receiving surfaces 12a and 14a. A pair of first cutters (first molds) 12 and 14 having a longitudinal opening 44 continuous in a direction orthogonal to the direction, and (b) a pair of tip ends respectively opposed to a pair of inner side surfaces 24b of the angle member 24. A plate-like second cutter (second type) 16 having a surface 16a and provided so as to be fitted into the openings 44 of the pair of first cutters 12, 14, and (c) a pair of the second cutters 16 A hydraulic pressing device (pressing device) 22 for pressing toward the first cutters 12, 14, and (d) an angle member 24 is inserted between the pair of first cutters 12, 14 and the second cutter 16. The second cutter 1 in the inserted state In the angle material cutting device 10 that cuts the angle material 24 by pushing it into the openings 44 of the pair of first cutters 12, 14, (e) the tip surface 16 a of the pair of tip surfaces 16 a of the second cutter 16. Since the concave groove 16b is provided along the longitudinal direction, the pressing area against the angle member 24 of the pair of tip surfaces 16a of the second cutter 16 is reduced, and the side edge of the tip surface 16a is reduced. Since the pressing force is concentrated on the portion, the angle member 24 can be cut with a relatively small pressing force if the angle member 24 has the same thickness as compared with the case where the pair of tip surfaces 16a are each composed of a flat surface. Can do. That is, the shear force of the angle material cutting device 10 can be improved without increasing the pressing force output from the hydraulic pressing device 22.

  Further, according to the angle member cutting device 10 of the present embodiment, in the pair of tip surfaces 16a of the second cutter 16, there is a pair of pressing planes 16c between the pair of side edges of the tip surface 16a and the groove 16b. Since it forms, the intensity | strength of a pair of side edge part of the front end surface 16a which functions as a cutting blade is raised, Breakage is prevented and durability is improved.

  In addition, according to the angle material cutting device 10 of the present embodiment, the engagement recesses 16 d that engage with the end portions 24 c in the width direction of the angle material 24 are formed on the pair of tip surfaces 16 a of the second cutter 16, respectively. Therefore, even if the angle member 24 is displaced during the pressing of the second cutter 16, one of the engagement recesses 16d is engaged with one of the end portions 24c in the width direction of the angle member 24, and the angle member 24 is Since it is returned to the center, stable cutting is possible.

  Further, according to the angle material cutting device 10 of the present embodiment, the angle R2 between the pair of tip surfaces 16a of the second cutter 16 is the angle between the pair of outer surface 24a or inner surface 24b in the cross section of the angle material 24. Since it is set larger, the cutting is started first from the end 24c in the width direction of the angle member 24, and then the cutting is continuously performed toward the center portion in the width direction of the angle member 24. The angle member 24 can be cut with a small pressing force of the hydraulic pressing device 22. Therefore, when the pair of first cutters 12 and 14 and the second cutter 16 are used as an attachment of the portable hydraulic actuator, the cutting function is enhanced.

  As mentioned above, although the Example of this invention was described based on drawing, this invention is applied also in another aspect.

  For example, in the angle material cutting device 10 of the present invention, the concave grooves 16b of the pair of distal end surfaces 16a are provided in the intermediate portion in the width direction of the pair of distal end surfaces 16a. It is not necessary to arrange in the middle part of the direction.

  Although not illustrated one by one, the present invention can be implemented in variously modified and improved modes based on the knowledge of those skilled in the art.

It is a figure which shows the whole portable angle | corner cutting device of one Example of this invention. It is the enlarged view to which the angle material cutting mechanism of the angle material cutting device of FIG. 1 was expanded. It is a perspective view explaining the structure of the angle material cutting mechanism of FIG. It is a perspective view explaining the structure of the angle material cutting mechanism of FIG. It is a figure explaining the structure of the 2nd cutter frame of the angle material cutting | disconnection mechanism of FIG. It is a figure explaining the structure of the 2nd cutter frame of the angle material cutting | disconnection mechanism of FIG. It is a perspective view explaining the 2nd cutter with which the 2nd cutter frame of Drawings 5 and 6 was equipped. It is a perspective view explaining the state by which the angle material was arrange | positioned at the angle material cutting device. It is IX-IX view sectional drawing which shows the state which the 2nd cutter is pressing the angle material with the pressing force of a hydraulic-type pressing device. It is sectional drawing which shows the state which the 2nd cutter moved toward the 1st cutter from the state of FIG.

Explanation of symbols

10: Angle material cutting device 12, 14: A pair of first cutters (first type)
12a, 14a: A pair of receiving surfaces 16: Second cutter (second type)
16a: a pair of tip surfaces 16b: a groove 16c: a pair of pressing planes 16d: an engaging recess 22: a hydraulic pressing device (pressing device)
24: Angle member 24a: A pair of outer side surfaces 24b: A pair of inner side surfaces 44: Opening R2: An angle between a pair of tip surfaces of the second cutter (second type)

Claims (4)

A first mold having a pair of receiving surfaces for receiving a pair of outer surfaces of the angle member, and a longitudinal opening continuous in a direction orthogonal to the longitudinal direction of the angle member on the pair of receiving surfaces, and a pair of the angle member A plate-like second mold having a pair of front end surfaces opposed to the inner side surfaces of the first mold, and capable of being fitted in the opening of the first mold, and the second mold toward the first mold A pressing device for pressing, and the angle member is cut by pushing the second die into the opening of the first die while the angle member is inserted between the first die and the second die. In angle material cutting device,
An angle material cutting device characterized in that a concave groove along the longitudinal direction of the tip surface is provided in the pair of tip surfaces of the second mold.   2. The angle member cutting device according to claim 1, wherein a pair of pressing planes are formed between the pair of side edges of the tip surface and the concave groove on the pair of tip surfaces of the second type.   The angle member cutting device according to claim 1 or 2, wherein an engagement recess for engaging with an end portion in the width direction of the angle member is formed on each of the pair of front end surfaces of the second type.   The angle between the pair of tip surfaces of the second type is set larger than the angle of the pair of outer surfaces or inner surfaces in the cross section of the angle member. 1 angle material cutting device.

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