JP2008012621A - Portable metal plate cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable metal plate cutting device capable of cutting even a vertically arranged metal plate, being easily carried up to an installation place of the metal plate and independently operating. <P>SOLUTION: This portable metal plate cutting device 110 for cutting the metal plate D such as a shutter is provided with a housing 10 having an internal space 65 opened in one direction, a rotary cutter 70 rotatably supported in the housing 10 so that a part of a plurality of outer peripheral cutting blades 77 formed on an outer periphery may be projected from an opening of the housing 10, and a slit 83 mounted at an opening edge 65a of the housing 10 to pass the projected outer peripheral cutting blades 77. The cutting device 110 includes a pressing member 80 mounted to be approachable/separable to/from the opening edge 65a of the housing 10 to be pressed to the vicinity of a cutting portion when cutting the metal plate D by the rotary cutter 70. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable metal plate cutting device that cuts a metal plate along a predetermined line by moving the metal plate while being pressed against the metal plate.

  For example, a reinforcing bar arranged in a predetermined shape when constructing reinforced concrete has a predetermined length for the convenience of manufacturing or handling. It is cut so as to be flush with each other. In order to cut the reinforcing bar, for example, a metal bar cutting device (see Patent Document 1) including a disk-shaped rotary cutting tool previously applied by the applicant of the present application is used. According to this metal bar cutting device, the rebar is cut by moving the cutting device with the rotary cutting tool approaching the floor surface or the like.

By the way, the metal member to be cut includes a metal plate in addition to the metal rod, and several metal plate cutting devices for cutting the metal plate are known. For example, a drum can opener (see Patent Document 2) that cuts a can of a drum that is a kind of metal plate includes a support that supports the body of the drum and a cylindrical blade that cuts the can of the drum. This drum can cutting device is used by being attached to a cargo handling vehicle, and supports a support body that supports the body portion of the drum can by the cargo handling vehicle, and lowers a cylindrical blade that cuts the canopy by the cargo handling vehicle.
Japanese Patent No. 3,705,782 Japanese Patent Laid-Open No. 10-24992

  However, the drum can opener forcibly pushes a non-rotating cylindrical blade into the canopy of the drum can to cut the canopy, and the cutting shape of the canopy by the cylindrical blade is limited to a circular shape. In addition, since the size (diameter) of the cylindrical blade is large, the drum can opener is large and cannot be carried by an operator, and must be transported by a small truck or the like, which requires labor and time for transport. Furthermore, the drum can opener alone cannot cut the canopy of the drum can and must be attached to the cargo handling vehicle when the canopy is cut. This makes it impossible to cut a metal plate arranged vertically, such as a shutter at a store entrance.

  The present invention has been made against the background of the above circumstances, and its purpose is to install a metal plate that is compact and can be cut into an arbitrary shape even if it is a metal plate arranged vertically. It is an object of the present invention to provide a portable metal plate cutting device that can be easily carried to a place and can be operated independently without being combined with other driving devices.

  To achieve this object, the gist of the present invention according to claim 1 is a portable metal plate cutting device for cutting a metal plate, the housing having an internal space opened in one direction, A rotary cutting tool that is formed on the outer periphery and is rotatably supported inside the housing such that a part of the outer peripheral cutting blade protrudes from the opening of the housing, and the rotary cutting tool attached to the opening edge of the housing A slit for passing the protruding outer cutting edge of the tool is attached so that it can approach and separate from the opening edge of the housing. When cutting the metal plate with a rotary cutting tool, press against the cutting part of the metal plate And a pressing member to be included.

  Further, the gist of the invention according to claim 2 is that the pressing member has a pressing plane having a certain length in the axial direction and the direction orthogonal to the axial direction of the rotary cutting tool, and a central portion of the pressing plane. This is because a slit is formed. Further, the gist of the invention according to claim 3 is that the pressing member has a front end supported by one end of the housing by an axis parallel to the axis of the rotary cutting tool, and a rear end approaching and separating from the opening edge of the housing. And a pair of protective portions that are urged toward the separation direction by the urging member, held at the separation position by the stopper, and positioned on both sides of the outer peripheral cutting blade from which the rotary cutting tool protrudes. There is.

  According to the portable metal plate cutting device according to claim 1, when the pressing member is moved while being pressed onto the surface of the metal plate, a plurality of outer peripheral cutting blades protruding from the opening of the housing of the rotary cutting tool are provided. The metal plate is sequentially cut into the metal plate, and the metal plate is cut along a predetermined line. At that time, the reaction force in the direction of the plate surface of the metal plate generated by the rotary cutting tool is due to the friction existing between the pressing member attached to the opening edge of the housing and the metal plate. The operator can easily and reliably cut the metal plate without adding much to the operator's hand holding the apparatus.

  According to the second aspect of the present invention, the pressing member is constant in the direction perpendicular to the axis of the rotary cutting tool, that is, the moving direction of the pressing member, and in the direction perpendicular to the axial direction of the rotary cutting tool, that is, the moving direction of the pressing member. A pressing plane having a length of. As a result, when the metal plate is cut by the rotary cutting tool, the pressing member abuts in the vicinity of the cutting portion of the metal plate over a wide area around the slit, so that the posture of the portable metal plate cutting device is stabilized, and the metal plate Can be cut more easily and reliably.

  According to the third aspect of the present invention, the pressing member is supported by an axis parallel to the axis of the rotary cutting tool, and the rear end of the pressing member is swingable in a direction approaching and separating from the opening edge of the housing. It is urged in the separation direction by the urging member and is held at a predetermined separation position by the stopper. As a result, when the metal plate is cut, the rear end of the pressing member swings in a direction approaching the opening edge of the housing, the outer peripheral cutting edge of the rotary cutting tool is passed through the slit, and is pressed against the metal plate to be carried. The mold metal plate cutting device is kept in a predetermined posture. On the other hand, when the metal plate is not cut, the rear end of the pressing member swings away from the opening edge of the housing, but the pair of protective portions of the pressing member covers the outer peripheral cutting edge from both sides. The user's hand of the mold metal plate cutting device is prevented from accidentally contacting the outer peripheral cutting blade, and safety is improved.

  An electric motor that rotates the rotary cutting tool and a battery that supplies electric power to the electric motor can be mounted on the rear end of the housing. According to this portable metal plate cutting device, since the electric motor and the capacitor are mounted on the rear end of the housing, there is a general-purpose power source at the installation location of the metal plate to be cut (for example, the shutter at the entrance of the store). Without it, it works and can cut the metal plate. Further, it is desirable that a grip handle can be attached to the upper surface of the housing, and the attachment direction can be adjusted at that time. According to this portable metal plate cutting device, since the mounting direction of the grip handle on the upper surface of the housing can be adjusted, the portable metal plate cutting device can be transported and the portable metal plate cutting can be performed by adjusting the mounting direction. The metal plate can be easily cut by the apparatus.

  Hereinafter, a portable metal plate cutting device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  1 is a front view (partially omitted) of the portable metal plate cutting apparatus, FIG. 2 is a plan view (partially omitted), and FIG. 3 is a longitudinal sectional view of FIG. Since the portable metal plate cutting device is moved from right to left in FIGS. 1 to 3 when cutting the metal plate, in the following description, the left side of FIGS. Is called the rear.

  1 to 3, a portable metal plate cutting device (hereinafter abbreviated as “metal plate cutting device”) 110 is a housing 10 having a predetermined shape, a tip saw 70 rotatably supported by the housing 10, A motor that is integrated with the housing 10 and rotationally drives the tip saw 70, a power transmission mechanism 50 that is built in the housing 10 and transmits the rotational driving force of the motor to the tip saw 70, and a metal plate that is swingably attached to the housing 10 and cut. For example, it includes a guide bracket 80 that is pressed against a shutter D arranged vertically in a store, a handle 101 that is gripped by an operator when the metal plate D is cut, and the like.

  The housing 10 includes a housing main body 11, a bearing cover lid 21, a cutting tool cover lid 61, and the like. A bearing holding portion 12 that protrudes low, a cover cover mounting portion 13 that protrudes high, and a bearing holding and cover cover mounting portion 14 that protrudes high are formed on one surface (the lower surface in FIG. 3) of the housing body 11. Yes. Three bearings 16, 17, and 18 are held by the bearing holding portion 12 so that their respective axes are parallel to each other. A bearing cover lid 21 disposed to face one surface of the housing body 11 is fixed to the housing body 11 with bolts or the like. Three bearings 24, 25, and 26 are held in the bearing holding portion 22 formed in the bearing cover lid 21 so that the respective axes are parallel to each other.

  One end of a rotary shaft 28 is fitted to the bearing 16 of the housing body 11, and the other end of the rotary shaft 28 is fitted to the bearing 24 of the bearing cover lid 21 and fixed by a nut 29, on the rotatable rotary shaft 28. The gear 31 is fixed. One end of a rotating shaft 33 parallel to the rotating shaft 28 is fitted to the bearing 17, the other end of the rotating shaft 33 is fitted to the bearing 25, and a gear 34 fixed on the rotatable rotating shaft 33 is a gear described above. 31 is engaged. One end of a rotary shaft 36 parallel to the rotary shaft 33 is fitted to the bearing 18, and the other end of the rotary shaft 36 is fitted to the bearing 26, and a gear 37 fixed to one end of the rotatable rotary shaft 36 is fixed. The gear 34 meshes with the gear 34. A gear 38 having a bevel gear portion is fixed near the other end of the rotary shaft 36.

  A plurality of bearings 41 are held in the bearing holding / cover cover mounting portion 14 such that the axis thereof is perpendicular to the axis of the bearing 16 or the like. The plurality of bearings 41 are fitted with intermediate portions in the axial direction of the rotating shaft 42, and a bevel gear 43 is fixed to one end (left end in FIG. 3) of the rotating shaft 42, and meshed with the bevel gear portion of the gear 38. Yes. The rotation of the rotating shaft 42 is converted by the bevel gear 43 and the gear 38 into the rotation of the rotating shaft 36 perpendicular to the rotating shaft 42. A gear 46 is fixed to the other end (right end in FIG. 3) of the rotating shaft 42.

The motor holding member 51 disposed over the bearing holding / cover cover attaching portion 14 and the extension portion 47 extending in a direction orthogonal to the housing main body 11 has a cylindrical portion 52 and a flange portion 53 at one end thereof. . A motor (not shown) is accommodated in a cylindrical portion 52 of the motor holding member 51, and a gear 57 fixed to an output shaft 56 of a motor rotatably supported by a bearing 55 meshes with the gear 46. The gears 31, 34, 37, 38, 43, 46 and 57 constitute a power transmission mechanism 50. A capacitor (not shown) for supplying electric power to the motor is disposed behind the motor. The flange portion 53 of the motor holding member 51 is fixed to the extension portion 47 by a bolt.
The grip handle 101 attached to the upper surface of the housing body 11 includes a vertical portion 102 and a horizontal portion 103, and can be rotated around the axis of the vertical portion 102, thereby changing the mounting direction of the horizontal portion 103 in an arbitrary direction. Can be adjusted.

Next, a disc-shaped tip saw 70 for cutting a metal plate D such as a shutter in a store, a corrugated plate (toned plate) or a drum can will be described. In FIG. 3, a recess 15 is formed on the other surface of the housing main body 11, and a recess 62 is also formed on the cutting tool covering portion 61 that covers the other surface. The cutting blade covering portion 61 is fixed to the housing main body 61 with a bolt 63. An internal space 65 defined by the recess 15 of the housing main body 11 and the recess 62 of the cutting tool cover 61 opens downward, and the tip saw 70 is accommodated in the internal space 65 and is fixed to the rotary shaft 28 by the mounting member 65. ing.
More specifically, as shown in FIG. 4, the tip saw 70 is made of a hollow disk-shaped metal plate, and the mounting hole 71 formed at the center is a circular hole 72 and a predetermined width and depth formed at the outer periphery thereof. And a plurality of engaging grooves 73. On the other hand, the attachment member 65 has a cylindrical portion 66 that penetrates the circular hole 72, a plurality of engagement protrusions 67 that engage with the engagement groove 73, and a pressing portion 68 that presses the inner periphery of the attachment hole 71. The bolt is fixed to the rotary shaft 28 by 69.

  A plurality of convex portions 75 and a plurality of concave portions 76 are alternately formed in the circumferential direction on the outer peripheral edge of the tip saw 70, and a cutting edge tip 77 made of cemented carbide on one surface of the convex portion 75 (which becomes the front surface during rotation). Is formed. As can be seen from FIG. 1, a part of the plurality of cutting edge tips 77 on the outer periphery of the tip saw 70 protrudes downward from the opening edge 65 a of the internal space 65.

  Next, the guide bracket 80 that is swingably attached to the opening edge 65a and guides the tip saw 70 will be described with reference to FIG. The guide bracket 80 includes a bottom plate 81, a shaft member 86, and a pair of protective plates 88. The bottom plate 81 has a rectangular plate shape, its lower surface is a pressing plane 82, and a slit 83 having a predetermined width and length is formed at the center. A shaft member 86 extending in the width direction of the bottom plate 81 is attached to a support portion 85 erected on one end (left end in FIG. 3) of the upper surface of the bottom plate 81. On the upper surface of the bottom plate 81, a pair of protective plates 88 having the same shape are erected at predetermined intervals on both sides of the slit 83. The protection plate 88 includes a relatively low portion 88 a near the shaft member 86 and a relatively high portion 88 b far from the shaft member 86, and the upper end edge is recessed in an arc shape corresponding to the outer peripheral edge of the tip saw 70.

  On the other hand, in FIG. 2, the shaft member 86 of the guide bracket 80 is inserted into the projecting portion 19 projecting from the front end of the housing body 11, and the guide bracket 80 can swing around the projecting portion 91. The shaft member 86 extends through the projecting portion 91, is parallel to the rotation shaft 28, and a contact member 92 that can contact the stopper 91 provided on the housing body 11 is fixed to the tip of the shaft member 86. The guide bracket 80 is urged by an L-shaped spring 94 through a contact member 92 in a direction in which a rear end portion thereof is separated from the opening edge 65a. That is, the L-shaped spring 94 has an intermediate mounting portion 94a attached to the housing main body 11 with a bolt 96, one end 94b engaged with a pin 97 erected on the housing main body 11, and the other end 94c. The pin 98 is erected on the contact member 92. The spring 94, the contact member 92, the stopper 91, and the like are covered with a cover 99 (see FIG. 1, not shown in FIGS. 2 and 3) attached to the housing body 11.

  Hereinafter, the operation of the present embodiment will be described. Here, the case where the metal plate D (refer FIG. 6) is cut | disconnected by the metal plate cutting device 110 of a present Example is demonstrated. The metal plate D is arranged vertically in the case of a shutter, and is arranged horizontally in the case of a drum can. Specifically, in FIGS. 1 to 3, the handle 101 is held with one hand, the cylindrical portion 52 of the motor holding member 51 is supported with the other hand, and the metal plate cutting device 110 is carried. With respect to the rotation of the motor, the rotation direction is changed by 90 degrees and the rotation speed is reduced via the power transmission mechanism 50 disposed between the rotation shaft 56 and the rotation shaft 28. As a result, the tip saw 70 rotates counterclockwise in FIG. 1 at a predetermined rotational speed.

  A part of the cutting edge tip 77 of the tip saw 70 protrudes downward from the opening edge 65a of the housing body 11 or the like. As shown in FIG. 6A, the metal plate cutting device 110 is moved closer to the metal plate D so that the opening edge 65 a forms a predetermined angle with respect to the surface of the metal plate D. At this time, the guide bracket 80 is urged in a direction away from the opening edge 65a (downward here) by the urging force of the spring 94, and the abutment member 92 abuts against the stopper 91 to prevent excessive separation. Is held at a remote position. An intermediate portion in the length direction of the bottom plate 81 of the guide bracket 80 is located in the vicinity of the cutting edge tip 77 protruding from the opening edge 65a, and the protruding cutting edge tip 77 is protected from both sides by a pair of protective plates 88.

  After bringing the front end of the bottom plate 81 into contact with the metal plate D, as shown in FIG. 6B, the handle 101 is pushed down, and the metal plate cutting device 110 is moved so that the opening edge 65a is parallel to the metal plate D. Rotate. Then, the guide bracket 80 swings counterclockwise around the shaft member 56 against the biasing force of the spring 94, and the cutting edge tip 77 of the tip saw 70 passes through the slit 83 of the bottom plate 81 of the guide bracket 80, It protrudes perpendicularly to the pressing plane 82 and bites into the metal plate D. Thereafter, the metal plate cutting device 110 is moved forward (leftward in FIG. 6) in a state where the pressing plane 82 of the bottom plate 81 of the guide bracket 80 is pressed near the cutting portion on the surface of the metal plate D. Then, the plurality of cutting edge tips 77 on the outer periphery of the rotating tip saw 70 bite into the metal plate D one after another and cut in a predetermined direction.

  According to the present embodiment, the following effects can be obtained. First, since the metal plate cutting device 110 of the present embodiment employs the rotating tip saw 70 as a cutting blade, the metal plate cutting device 110 only needs to be moved along a predetermined path along the surface of the metal plate D. The metal plate D can be cut into a predetermined shape. This is because the tip saw 70 protrudes downward perpendicular to the pressing plane 82 of the guide bracket 80 and bites into the metal plate D vertically.

  Further, the metal plate cutting device 110 according to the present embodiment is configured such that when the cutting of the metal plate D is started, the metal plate cutting device 110 is made of metal due to the reaction force generated by the contact between the tip saw 70 rotating in the forward direction and the metal plate D. There is a tendency to be pulled forward along the surface of the plate D. However, since the tip of the bottom plate 81 is pressed against the metal plate D, the guide bracket 80, that is, the metal plate cutting device 110 is prevented from moving forward with respect to the metal plate D due to the friction between the two. The

  Further, the metal plate cutting device 110 of this embodiment presses the pressing plane 82 of the bottom plate 81 of the guide bracket 80 against the vicinity of the cutting site on the surface of the metal plate D while cutting the metal plate D. Work is stable. The rectangular plate-shaped bottom plate 81 abuts on the surface of the metal plate D with a large area pressing plane 82, and as a result, the metal plate cutting device 110 is moved in the direction perpendicular to the moving direction and the posture of the metal plate cutting device 110. Is stable. Accordingly, the moving direction of the tip saw 70 is maintained in a predetermined state, and the angle formed by the tip saw 70 with respect to the surface of the metal plate D is maintained at a right angle.

  Further, when the cutting of the metal plate D by the tip saw 70 is started, the rear end of the guide bracket 80 is separated from the opening edge 65a, and a part of the cutting edge tip 77 of the tip saw 70 protrudes downward from the opening edge 65a. However, since the pair of protective plates 88 of the guide bracket 80 are located on both sides of the tip saw 70, there is no worry that an operator accidentally touches the cutting edge tip 77 of the tip saw 70 with his / her hand.

Furthermore, since the metal plate cutting device 110 of the present embodiment has a compact structure, a small outer dimension, and a light weight, it can be carried. Therefore, wherever the metal plate D is installed, the metal plate cutting device 110 can be carried to the installation location and the metal plate D can be cut quickly. In addition, since the metal plate cutting device 110 of the present embodiment has a built-in capacitor that supplies electric power to the motor, the metal plate D can be cut even in a place where a general-purpose power source cannot be secured.
Further, since the mounting direction of the horizontal portion 103 of the grip handle 101 attached to the upper surface of the housing main body 11 can be adjusted, the mounting direction of the handle 101 can be adjusted according to the convenience of cutting. The cutting work of the metal plate D by the cutting device 110 becomes easier.

  As mentioned above, although the suitable Example of this invention was described referring drawings, this invention is not limited to this, It can implement also in another aspect. First, the housing 10 only needs to support at least the tip saw 70 in a rotatable manner, and it is not essential to include the housing main body 11, the bearing cover lid 21, and the cutting tool cover lid 61 as in the above embodiment. Further, the specific configuration of the mounting hole 71 at the center of the tip saw 70 that is a rotary cutting tool and the configuration of the outer peripheral cutting edge tip 77 are not limited to those of the above embodiment.

  In addition, regarding the guide bracket 80 as a pressing member, in the above embodiment, the tip saw 70 rotates forward with respect to the moving direction of the metal plate cutting device 110, and the front end of the bottom plate 81 of the guide bracket 80 is related to this. Is pivotally supported by the front end of the housing body 11 and the rear end swings. However, the rotation direction of the tip saw 70 and the swinging direction of the bottom plate 81 of the guide bracket 80 are not limited to this. For example, the tip saw 70 rotates backward, and the rear end of the bottom plate 81 pivots to the rear end of the housing body 11. The front end may swing.

Further, the position and direction of the motor with respect to the rotary cutting tool and the configuration of the power transmission mechanism 50 that transmits the driving force of the motor to the rotary cutting tool are not limited to those of the above embodiments. Specifically, the axis of the rotary cutting tool 70 and the axis of the motor may form an angle other than a right angle, and the number of gears constituting the power transmission mechanism 50 may be larger or smaller than that of the embodiment. Also good. In addition, providing the grip handle 101 is not indispensable and can be eliminated. In this case, for example, a part of the housing or a motor holding member is held. Even when the grip handle is provided, the location is not limited to the upper surface of the housing.
Furthermore, the portable metal plate cutting device of the present invention includes various metal plates such as a corrugated plate (tonned plate), a shutter at the entrance of a store arranged vertically, in addition to a drum can body and a top plate arranged horizontally. Can also be cut.

It is the front view which abbreviate | omitted illustration of the portable metal plate cutting device by the Example of this invention. It is the top view which abbreviate | omitted illustration of the portable metal plate cutting device by the said Example. It is a cross-sectional view in FIG. It is a front view of the rotary cutting tool of the said Example. The guide bracket of the said Example is shown, (a) is a front view of a guide bracket, (b) is a longitudinal cross-sectional view of a guide bracket, (c) is a cross-sectional view of a guide bracket. The operation of the above embodiment is shown, (a) shows the state of the portable metal plate cutting device at the start of cutting, and (b) shows the state of the portable metal plate cutting device during cutting.

Explanation of symbols

10: Housing, 11: Housing body, 21: Bearing cover lid, 28, 33, 36 and 42: Rotating shaft, 50: Power transmission mechanism, 61: Cutting tool cover plate, 65: Internal space, 65a: Opening edge, 70 : Tip saw (rotary cutting tool), 71: Center hole, 77: Cutting edge tip (outer peripheral cutting edge), 80: Guide bracket (pressing member), 81: Bottom plate, 83: Slit, 88: Protection plate, 91: Stopper 94: Spring 110: Portable metal plate cutting device D: Metal plate

Claims (3)

A portable metal plate cutting device for cutting a metal plate,
A housing having an internal space opened in one direction;
A plurality of outer peripheral cutting edges formed on the outer periphery, and a rotary cutting tool supported rotatably inside the housing such that a part of the outer peripheral cutting blade protrudes from the opening of the housing;
It is attached to the opening edge of the housing, and is provided with a slit for allowing the protruding outer peripheral cutting edge of the rotary cutting tool to pass through, and is attached to the opening edge of the housing so as to be able to approach and separate from the metal. A pressing member pressed against the vicinity of the cutting portion of the metal plate when cutting the plate;
A portable metal plate cutting device comprising:   The pressing member has a pressing plane having a certain length in an axial direction and an axis orthogonal direction of the rotary cutting tool, and the slit is formed in a central portion of the pressing plane. The portable metal plate cutting device according to claim 1. The pressing member has a front end supported on one end of the housing by an axis parallel to the axis of the rotary cutting tool, and a rear end swingable in a direction approaching and separating from the opening edge of the housing. The mobile phone according to claim 2, further comprising a pair of protection portions that are urged in a separation direction by a member and are held at a separation position by a stopper, and are positioned on both sides of an outer peripheral cutting blade from which the rotary cutting tool protrudes. Mold metal plate cutting device.

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