JPH028650Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a cutting waste guiding device in a shearing tool used particularly for shearing thin plate-like workpieces.

BACKGROUND ART In conventional shearing tools, cutting chips that are continuously formed during shearing of a workpiece are left in a spirally wound state directly above the sheared area.

Problems that the invention aims to solve: In the case of conventional shearing tools, as the shearing process progresses, the rolled cutting chips stagnate in the sheared area and are pressed against the unsheared part of the workpiece. There was a problem in that workability deteriorated due to added frictional resistance.

An object of the present invention is to provide a shearing device for a shearing tool that can avoid the above-mentioned problems and properly dispose of cutting waste.

Means for Solving the Problems The present invention has a pair of left and right fixed blades attached to both the support parts, respectively, between the left and right support parts arranged in parallel near the front end of the shearing tool body, and A guide roller disposed near the upper part of the blade part of the movable blade is installed in order to guide upward the cutting waste that is continuously discharged by the shearing action of the movable blade supported so as to be able to swing back and forth between the parts. The gist of this invention is a guiding device for transferred and supported cutting chips.

(Function) The device of the present invention uses the shearing action of a movable blade that swings back and forth and left and right fixed blades placed on both sides of the movable blade to remove cuttings continuously discharged near the upper part of the blade of the movable blade. It is configured to be brought into sliding contact with a rotatably supported guide roller, so that the winding behavior is regulated and the winding is guided upward in an expanded state.

Embodiment Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, 1 is a motor housing installed at the rear of the shearing tool main body S,
The motor 2 is installed horizontally inside the motor housing 1.
Near the rear end of the interior is a switch button 3 that can be moved in the front and back direction and is used to start and stop the motor 2.
A switch 3 with a pointing upward is provided.

Reference numeral 4 denotes a switch rod that is attached to the upper end of the motor housing 1 so as to be able to move forward and backward in the front and rear directions in order to open and close the contacts of the switch 3. A rod portion 4a formed to be elastically deformable in a plate shape;
In order to allow the switch button 3a to co-moveably fit into the rear end of the rod portion 4a, the side surface is formed into a substantially shaped shape, and a spring 5 provided below near the rear end of the rod portion 4a always causes the switch button 3a to be attached to the rear. Forced fitting part 4b
and an operating piece 4c which is exposed above the motor housing 1 through an insertion opening 1a which is protruded from the front end of the rod part 4a and is opened near the front end of the upper end of the motor housing 1. A protrusion 6 is provided on the lower side of the front end of the piece 4c so as to be able to engage with an engagement hole 1b recessed in the upper surface near the front end of the motor housing 1, and the rear lower surface of the operating piece 4c is directed rearward. It is sloped upward. When the switch rod 4 is held at the forward end, the protrusion 6 of the operating piece 4c engages with the engagement hole 1b to restrict the switch rod 4 from retreating, and the switch button 3a, which has moved forward together with the fitting portion 4b, is locked at the forward end. When the rear part of the operating piece 4c is pressed down in this state, the rod part 4a is elastically deformed into a concave arc shape, and the engagement between the protrusion 6 and the engagement hole 1b is disengaged ( (see FIG. 3), the switch rod 4 is allowed to retreat. Furthermore, when the switch rod 4 is moved backward from the forward end, the switch button 3a is
moves backward, the rotation of the motor 2 stops, and the rod part 4a
horizontally elastically recovers, the operating piece 4c returns to its original position, the protrusion 6 engages with the insertion hole 1a, the forward movement of the switch rod 4 is restricted, and the switch button 3a is locked at the backward end. Also, Switch Rod 4
At the backward end, the forward movement of the switch rod 4 can be released by pushing down the rear part of the operating piece 4c.

Reference numeral 7 denotes a substantially U-shaped crank housing in plan view, which is connected to the front of the motor housing 1, and has a crank housing extending in a tapered shape toward the front, with a gap 7c between the front and the upper and lower sides open. A pair of left and right support portions 7a and 7b are arranged side by side so as to be elastically deformable in the horizontal direction.

Reference numeral 8 denotes a crankshaft rotatably mounted across the front end of the motor housing 1 and the rear end of the crank housing 7, and a gear 9 is connected to the pinion 10 formed at the front end of the motor shaft of the motor 2 at the rear end. The eccentric shaft part 8a is fitted with a crank arm 12 via a bearing 11, and an eccentric shaft part 8a is formed slightly forward of the central part thereof, and the eccentric rotation of this eccentric shaft part 8a cranks the crank arm. A connecting member 14 connected to the lower end of the arm 12 via a pin 13 is moved up and down.

Reference numeral 15 denotes a movable blade that is swingably supported at the lower end of the crank housing 7 via a pin 16 horizontally suspended between the supporting parts 7a and 7b. A blade portion 15 having left and right blade lines 17, 17 arranged symmetrically in parallel on both upper edges.
a is formed, and the connecting member 14 is connected to the rear end via a pin 18, and the movable blade 15 is reciprocated by rotation of the crankshaft 8.

Reference numerals 19A and 19B are a pair of left and right fixed blades that are respectively attached to the lower surfaces of the front ends of both support parts 7a and 7b of the crank housing 7 in order to shear the workpiece in cooperation with the movable blade 15. The left fixed blade 19A on the left side is 1/1/2.
It is fastened with a screw 21 via a spacer 20 with a wall thickness of the order of 10 mm (0.3 mm in this example), and is formed slightly upwardly in the front-rear direction with respect to the inner end of the left fixed blade 19A. The left side blade line 22A is parallel to the inner end of the right fixed blade 19B and is parallelly displaced downward by a distance h on the order of 1/10 mm with respect to the right side blade line 22B, which is formed parallel to the left side blade line 22A, and ,
The left and right side blade lines 22A, 22B are the same double edge lines 22A, 2
2B is the left and right intersection point K1, K2 where the movable blade 15 intersects with both side edge lines 17 of the movable blade 15 when the movable blade 15 swings.
is set so that it is slightly deviated in the front-back direction, and the discharge direction of the cutting waste that is continuously formed by the shearing action of the movable blade 15 and both fixed blades 19A and 19B is deviated from directly above to the front and to the right. be done.

Reference numerals 23 denote both support parts 7a and 7b of the crank housing 7 above the blade part 15a of the movable blade 15 in order to slide on the cutting waste immediately after being discharged and guide the cutting waste upward.
A guide roller is rotatably supported between the guide rollers, and is fitted within the gap 7c to a support bolt 24 that extends horizontally through both the support parts 7a and 7b and is screwed into a nut 25.
The discharged cutting chips slide in contact with the vicinity of the rear side of the guide roller 23 in a spread state with the winding behavior restricted and move upward within the gap 7c, and the guide roller 23 defines a discharge path for the cutting chips. be done. Moreover, when the support bolt 24 is screwed, both the support parts 7a, 7
b is elastically deformed, the gap 7c is expanded or contracted, and the clearance between the movable blade 15 and both fixed blades 19A, 19B can be adjusted.

26 is in sliding contact with the guide roller 23 and intersects almost perpendicularly to the cutting waste discharge direction with respect to a recess 27 formed in the right support portion 7b in order to guide the cutting waste deflected to the right and discharged upward. The guide pin is made of a hard material such as hardened steel, and is suspended horizontally in the front-rear direction so that the cutting waste that comes into sliding contact with the guide roller 23 is removed by the guide pin 26 to the outside of the right support portion 7b. A discharge path for the cutting waste to be guided to the outside of the shearing tool body S is defined, and the cutting waste and the crank housing 7 are
Sliding contact with is regulated.

Next, the operation and effects of the embodiment having the above configuration will be explained.

Now, in this example, between the left and right support parts 7a and 7b arranged in parallel at the front end of the shearing tool main body S, there is a pair of left and right fixed blades 19A and 19B attached to both the support parts 7a and 7b, respectively. The movable blade 15 is supported between the supporting parts 7a and 7b so as to be able to reciprocate and swing.The movable blade 15 is designed to guide the chips continuously discharged by the shearing operation between the supporting parts 7a and 7b in an extended state and upward. Blade part 15
A guide roller 23 disposed near the top of a is rotatably supported.

Therefore, when shearing a workpiece, the movable blade 1
Immediately after being discharged, the cutting chips deflected to the right by the shearing action of the fixed blades 19A and 19B on both sides slide against the rear side of the guide roller 23, and the winding behavior is restricted and the chips are spread out. As a result of being guided upward, the cutting waste plastically deforms to an increased radius of curvature and passes through the discharge path defined by the guide roller 23, and the discharged cutting waste stays in a wound state and slides into contact with the workpiece. Malfunctions can be reliably prevented.

In addition, the cutting debris slides on the guide roller 23 and then moves while being deflected to the right, and then moves to the guide pin 23.
6 and guided to the outside of the shearing tool body S, a discharge path for the cutting debris from the shearing area to the outside of the shearing tool body S is established, and the cutting debris is guided to the outside of the shearing tool body S.
As a result of being accurately and smoothly led out, workability during shearing can be improved, and the problem of damage to the shearing tool body S caused by the cutting debris being rubbed against the shearing tool body S can be prevented.

Effects of the invention In other words, the present invention has a pair of left and right fixed blades attached to both the support parts, respectively, between the left and right support parts arranged in parallel near the front end of the shearing tool body, and a pair of left and right fixed blades attached to the support parts, respectively. On the other hand, a guide roller disposed near the upper part of the blade of the movable blade is rotatably supported in order to guide upward the cutting waste that is continuously discharged by the shearing action of the movable blade that is supported so as to be able to swing back and forth. This has the effect of accurately and smoothly guiding the cutting debris in a spread state, defining a discharge path for the cutting debris, eliminating obstacles caused by stagnation of cutting debris during work, and improving work efficiency. .

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a partially cutaway side view of the shearing tool body, FIG. 2 is a side view illustrating the operation of the switch rod, and FIG. An X-ray sectional view, FIG. 4 is an enlarged sectional view taken along the Y-Y line, FIG. 5 is an enlarged side view illustrating the relative positions of the movable blade and both fixed blades, and FIG. 6 is a perspective view of the main parts. . 7a, 7b...Support part, 15...Movable blade, 19
A, 19B... Fixed blade, 23... Guide roller, S
...Shearing tool body.

Claims (1)

[Scope of utility model registration request] A pair of left and right fixed blades are respectively attached to both the support parts between the left and right support parts arranged in parallel near the front end of the shearing tool body, and a pair of left and right fixed blades are supported so as to be able to swing back and forth between the two support parts. A shearing tool, characterized in that a guide roller is rotatably supported, which is disposed near the upper part of the blade part of the movable blade, in order to guide upward the cutting waste that is continuously discharged by the shearing operation with the movable blade. Cutting waste guiding device.