JP2008142879A - Manual cutting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an innovative manual cutting device with high practicability free from unconsidered push-down, which prevents mutilation accident of a human body. <P>SOLUTION: This cutting device is provided with: an operating push-down arm 3 pivotally attached to a base 1 via an arm pivotally moving section 2; a cutting cutter 5 connected with a motor 4 with a brake; a work fixing tool 6; and a coil spring device 7 becoming the stopper of the operating push-down arm 3 while providing elasticity to the base 1 and the operating push-down arm 3. A lever for the stopper is pivotally attached to the base 1 having a lever pivotally moving section for the stopper intervened therebetween. A step for the stopper to be locked on the movable side A at a regular opening angle, and a gripping section are provided in the lever for the stopper. A coil spring for the lever is extended in the side face of the lever for the stopper to constantly provide elasticity to the movable side A. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a manual cutting device that cuts a workpiece with a cutting cutter such as a chip saw by pushing down a pressing arm for operation by human power, and more specifically, is mainly a light metal workpiece such as aluminum. The present invention relates to a manually operated large-sized and high-speed cutting device suitable for cutting a long punching material or cutting a gate of a die-cast product with a cutting cutter such as an electric tip saw.

  Since this type of manual cutting device has been developed and can be easily used in the field, factories, etc., it has been widely used to cut light metals, synthetic resins, wood, reinforcing bars, etc. A cutting cutter such as a tip saw, that is, an incorrect operation to cut with a disc-shaped saw blade, is extremely dangerous. The fact is that accidents do not cease due to caution, and there is currently no drastic solution.

For example, as a manual-type cutting device disclosed above, a base having a fixing arm and a fixing device for clamping a workpiece, a rotary blade supported on one end of the fixing arm and a rotary blade provided on the other A movable arm provided with a motor for driving a rotary blade, and a cover that covers the workpiece is rotatably attached to the base, and one end of the movable arm or the fixed arm is used as a fulcrum for the movable arm. A pressing piece for rotating the cover is provided on one end of the feed handle that is supported and attached. In conjunction with the vertical movement of the feed handle of this cutting device, the cover can be put on and released from the work piece, so that it is not necessary to operate the cover separately and the cutting work can be performed efficiently. What can be done (see Patent Document 1) and the present invention is a high-speed cutting machine with a safety cover that can cut a cutting material with a rotating saw blade. When the saw blade does not descend to the cutting material side, the lower semicircular portion of the saw blade And a drive-type safety cover that can be rotated via a rotating shaft so as to cover the lower semicircular portion of the saw blade when the saw blade descends to the cutting material side. (See Patent Document 2).
Japanese Utility Model Publication No. 7-33530 JP-A-10-202423

  However, in Patent Document 1, a cover that covers the workpiece is rotatably attached to a base, and either one end of a movable arm or one end of a feed handle that is supported and attached to the movable arm with a fixed arm as a fulcrum. A pressing piece for rotating the cover is provided on either side. In conjunction with the vertical movement of the feed handle of this cutting device, the cover can be put on and released from the work piece, so that it is not necessary to operate the cover separately and the cutting work can be performed efficiently. In Patent Document 2, when the saw blade does not descend to the cutting material side, it covers the lower semicircle of the saw blade, and when the saw blade descends to the cutting material side, A drive-type safety cover that can be rotated via a rotating shaft to cover the side semicircular part is installed, and both are designed to prevent chips and crushed parts from splashing and to ensure safety. Yes, safety is not considered for a radically rotating cutting blade.

  In view of the above-mentioned problems, the present invention solves these problems as a result of diligent research. The manual cutting device according to claim 1 is for operation that is pivotally attached to a base via an arm pivot. A pressing arm, a motor with a brake fixed on the movable side that moves together with the pressing arm for operation, a cutting cutter, a workpiece fixing jig provided on a base for sandwiching a workpiece to be cut by the cutting cutter, and a base A coil spring device that keeps the operation push arm constantly at a constant opening angle and that serves as the lowest limit stopper of the operation push arm, and starts pushing down the operation push arm against the elasticity of the coil spring device By turning the limit switch ON and driving the motor with brake, the cutting cutter cuts the workpiece. The stopper lever is pivotally attached, and the stopper lever is provided with a stopper step and a grip, and a lever coil spring is stretched on the side of the stopper lever so as to constantly give elasticity to the movable side. It is a thing.

  Further, the manual cutting device according to claim 2 is the manual cutting device according to claim 1, wherein a support rod is erected on the base, and a fixing tool is interposed on the support rod, so that a mist cutting oil is provided. The spraying device is fixed, and an electromagnetic air valve that sprays the mist cutting oil of the mist cutting oil spraying device onto the cutting cutter is provided, and an oil supply tube is provided at the tip of the electromagnetic air valve.

  As described above, the manual cutting device of the present invention has a stopper lever pivoted on the base and pivots the stopper lever, and the stopper lever is locked on the movable side at a constant opening angle. The stopper step and gripping parts are provided, and the coil spring for the lever that gives elasticity to the movable side is stretched on the side of the stopper lever. When it is flipped up by the device, the stopper step of the stopper lever is locked to the movable side, and there is no inadvertent depressing, and it is possible to avoid a human body cutting accident. It is an invention.

  Hereinafter, an embodiment of the manual cutting device of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic side view for explaining the outline of the embodiment of the manual cutting device of the present invention. FIG. 3 is an explanatory front view for explaining the outline of the embodiment of the manual cutting device of the present invention, and FIG. 3 is an explanatory diagram illustrating the main part of the embodiment of the manual cutting device of the present invention.

  The present invention relates to a manual cutting device that cuts a workpiece W with a cutting cutter such as a chip saw by pushing down an operation pressing arm manually, and more specifically, mainly a light metal workpiece W such as aluminum. It is related with the manual-type large sized and high-speed cutting device suitable for cutting | disconnecting the long punching material which is these, or cutting the sprue of a die-cast product with cutting cutters, such as an electric tip saw. The manual cutting device includes an operation pressing arm 3 pivotally attached to a base 1 via an arm pivoting portion 2, and a motor with a brake of a drive source fixed to a movable side A that moves together with the operation pressing arm 3. 4 and a disk-shaped cutting cutter 5 that is mechanically connected to the workpiece W and cuts the workpiece W, and a workpiece fixing jig provided on the base 1 that sandwiches the workpiece W to be cut by the cutting cutter 5. 6 and a coil spring device 7 that provides elasticity so as to keep the base 1 and the operation pressing arm 3 constantly at a constant opening angle and serves as a lower limit stopper of the operation pressing arm 3. The pushing arm 3 for operation is pushed down against the elasticity of the coil spring device 7 to turn on the limit switch 8 to drive the motor 4 with brake and the cutting cutter 5 rotates to cut the workpiece W. In this manual cutting device, a stopper lever pivoting portion 9 is interposed on the base 1 and a stopper lever 10 is pivotally attached. The distal end of the stopper lever 10 is fixed to the movable side A. A stopper step 10a that is locked at an open angle and a gripping portion 10b are provided at the tip, and the side of the stopper lever 10 is constantly given elasticity to the movable side A. It is characterized in that it has stretched the lever coil spring 11.

  Further, the manual cutting device according to claim 2 is the manual cutting device according to claim 1, wherein a support rod 12 is erected on the base 1, and a fixing tool is attached to the distal end side of the support rod 12. Is provided with an electromagnetic air valve 14 for fixing the mist cutting oil spraying device 13 and spraying the mist cutting oil of the mist cutting oil spraying device 13 onto the cutting cutter 5, and an oil supply tube 15 at the tip of the electromagnetic air valve 14 is provided. It is characterized by being disposed.

  That is, the manual cutting apparatus of the present invention pivots the fixed side of the base 1 and the workpiece fixing jig 6 and the movable side A of the operation pressing arm 3, the brake motor 4, the cutting cutter 5, and the like. It is something that is free.

  The base 1 includes a caster that is movable on the lower surface, and an arm pivot that pivotally attaches a base end of a workpiece fixing jig 6 and an operation pressing arm 3 to be described later to the upper surface. The moving part 2 and the lever pivoting part 9 for a stopper are provided.

  Next, the operation pressing arm 3 has a rod-like shape and is provided with a manual handle on the distal end side, and the proximal end side is pivotally attached to the base 1 via the arm pivoting portion 2. 4 and the cutting cutter 5 are fixed integrally, and the movable side A is comprised.

  Next, the cutting cutter 5 is, for example, a disc-shaped one such as an aluminum die-cast product or a zinc die-cast product, which is a special cemented carbide tip saw. It is also possible to replace the cutting cutter 5 such as, which is fixed to the rotating shaft and covered with a chip scattering prevention cover, and the rotating shaft is mechanically connected to the motor 4 with a brake as a driving source. And is fixed to the operation pressing arm 3 and is moved together by manually pressing the operation pressing arm 3 to cut the workpiece W.

  Furthermore, the workpiece fixing jig 6 is a screw rod that is provided on the upper surface of the base 1 and sandwiches a workpiece W such as an aluminum die-cast product that is cut by a cutting cutter 5 such as a chip saw, and is screwed in the front-rear direction. The workpiece W is sandwiched by adjusting the interval between the pair of sandwiching pieces by rotating, and a stopper screw for adjusting the length of cutting is also known.

  Further, the coil spring device 7 includes upper and lower support rods 12 that interpose coil springs, the upper support rod 12 is fixed to the movable side A, and the lower support rod 12 is fixed to the base 1. 1 and the movable side A, that is, the pressing arm 3 for operation, is given elasticity so that it is constantly maintained at a constant opening angle, and the workpiece W is cut against the elasticity by operating the pressing arm 3 for operation. When pressed down to the lowest limit, it becomes a stopper for the movable side A, that is, the operation pressing arm 3. When the operation pressing arm 3 is pressed down against elasticity, the coil spring is compressed and compressed to a certain length. The coil spring is no longer compressed.

  Next, the limit switch 8 starts to push down the operation pressing arm 3 against the elasticity of the coil spring of the coil spring device 7 to turn on the electromagnetic switch by the limit switch to drive the motor 4 with brake. The limit switch 8 is turned OFF when the operation pressing arm 3 returns to a certain opening angle due to the elasticity of the coil spring of the coil spring device 7, and the brake is turned off. The drive of the attached motor 4 is stopped.

  The stopper lever 10 is substantially wedge-shaped with the upper part widened, and the base end is pivotally attached to the base 1 with the stopper lever pivot 9 interposed therebetween, The holding part 10b is provided.

  Next, the stopper step is formed at the tip side of the stopper lever 10 and locks the movable side A at a constant opening angle. In the embodiment, the brake motor 4 and the cutting cutter 5 are connected to each other. It is locked to the cover of the connected rotating shaft.

  Further, the gripping portion 10b is provided at the tip of the operation pressing arm 3, and is for pivoting the operation pressing arm 3 against the elasticity of a lever coil spring 11 described later.

  Furthermore, the lever coil spring 11 is stretched between the side surface of the stopper lever 10 and the movable side A. The lever coil spring 11 is continuously given elasticity to the movable side A and moves the stopper lever 10 to the movable side A. I will try to let you.

  The support rod 12 is a rod-like one standing on the base 1, and the mist cutting oil spraying device 13 is filled with mist cutting oil, and a fixing tool is interposed at the tip side of the support rod 12. Further, the electromagnetic air valve 14 is provided in the fixture, and sprays the mist cutting oil filled in the mist cutting oil spraying device 13 onto the cutting cutter 5. The oil supply tube 15 is the electromagnetic air valve 14. And the cutting cutter 5 are connected to each other, and an injection port for spraying mist cutting oil onto the cutting cutter 5 is provided at the tip of the oil supply tube 15.

  That is, in the manual cutting device of the present invention, when not in use, the base 1 and the movable side A are constantly held at a constant open angle by the elasticity of the coil spring device 7 as shown in FIG. In this state, the stopper lever 10 is pulled to the movable side A by the elasticity of the lever coil spring 11, the stopper step 10a is locked to the lower surface of the movable side A, and the operation pressing arm 3 is pivoted. It has become impossible.

  When the workpiece W is clamped and cut by the workpiece fixing jig 6, the gripping portion 10b at the tip of the stopper lever 10 is pulled toward the front against the elasticity of the coil spring 11 for the stopper. Is removed from the lower surface of the movable side A, and at the same time, the operation pressing arm 3 is pushed down against the elasticity of the coil spring device 7.

  Then, the movement of the movable side A is detected, the limit switch 8 is turned ON, the brake motor 4 is driven, and the cutting cutter 5 rotates. Further, the cutting cutter 5 cuts the workpiece W by pushing down. is there.

  When the cutting is completed, the coil spring device 7 becomes a stopper when it moves to the lowest limit of the operation pressing arm 3, and the movable side A pivots around the arm pivot 2 by the elasticity of the coil spring of the coil spring device 7. The stopper step 10a of the stopper lever 10 which is elastically applied by the lever coil spring 11 and is locked to the lower surface of the movable side A again when the movable side A and the side surface are in contact with each other. The limit switch 8 is turned off when it reaches a certain opening angle, and stops driving the motor 4 with brake. The motor 4 with brake rotates when the power is cut from the viewpoint of danger prevention. It is equipped with a brake function that stops the vehicle instantaneously.

  In addition, a pilot lamp 17 is provided to light up the electric control box 16 that can be provided with the attached inverter specifications so that the user can confirm that the power supply is in an input state, that is, a movable state. It is.

  In the present invention, a stopper lever pivoting portion is interposed on the base, and the stopper lever is pivotally mounted. The stopper lever is provided with a stopper step portion and a gripping portion that are locked at a certain opening angle on the movable side. When the lever spring for the lever is continuously stretched on the side of the lever for the stopper, the pressing arm for operation is lifted by the coil spring device to a certain open angle after cutting. The stopper step portion of the lever is locked to the movable side, so that there is no inadvertent depression, and a safe manual cutting device is provided.

  FIG. 1 is a schematic side view for explaining the outline of an embodiment of the manual cutting apparatus of the present invention.   FIG. 2 is an explanatory front view for explaining the outline of the embodiment of the manual cutting device of the present invention.   FIG. 3 is an explanatory view illustrating the main part of an embodiment of the manual cutting device of the present invention.

Explanation of symbols

W Work A Movable side 1 Base 2 Arm pivot part 3 Operation push arm 4 Brake motor 5 Cutting cutter 6 Work fixing jig 7 Coil spring device 8 Limit switch 9 Stopper lever pivot 10 Stopper lever 10a Stopper step portion 10b Grip portion 11 Lever coil spring 12 Support rod 13 Mist cutting oil tank 14 Electromagnetic air valve 15 Lubrication tube 16 Electric control box 17 Pilot lamp

Claims (2)

  The operation pressing arm pivotally attached to the base via the arm pivot portion and the brake motor of the driving source fixed to the movable side that moves together with the operation pressing arm are mechanically connected to cut the workpiece. A disc-shaped cutting cutter, a workpiece fixing jig provided on a base for sandwiching a workpiece to be cut by the cutting cutter, and the base and the pressing arm for operation are constantly held at a constant opening angle. A coil spring device that provides elasticity and serves as a lower limit stopper for the operation pressing arm, and starts to push down the operation pressing arm against the elasticity of the coil spring device. Is turned on to drive the motor with brake and the cutting cutter rotates to cut the workpiece. A stopper lever is pivotally attached, and a stopper step and a gripping portion are provided at the tip side of the stopper lever at a fixed opening angle on the movable side, and a side surface of the stopper lever is provided. A manual cutting device characterized in that a coil spring for a lever is stretched so as to constantly give elasticity to the movable side.   A support rod is erected on the base, and a mist cutting oil spraying device is fixed to a tip side of the support rod with a fixing tool, and the mist cutting oil of the mist cutting oil spraying device is sprayed on a cutting cutter. 2. The manual cutting device according to claim 1, further comprising an electromagnetic air valve that sprays the mist cutting oil of the mist cutting oil spraying device to the cutting cutter, and an oil supply tube is disposed at a tip of the electromagnetic air valve.

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