JP3531472B2 - Shearing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shearing machine for shearing a material such as angle steel.

[0002]

2. Description of the Related Art Since a conventional shearing machine employs a C-shaped frame with an opening in the center, it has a structure that supports a reaction force applied to the frame by a cantilever structure during shearing, thereby enhancing rigidity. Therefore, the mass was as heavy as 80 kg or more. For this reason, as shown in FIGS. 14 to 16, a support column 32 for supporting the front portion of the frame 31 is provided, the frame 31 has a support structure at both ends, and the load is distributed to reduce the weight. The structure provided with the columns 32 is generally called a gate frame.

[0003] In this gate-shaped frame, the pillars 32 are an obstacle when exchanging dies, taking in and out of materials, etc., so that the shaft 33 provided at the lower end of the frame 31 serves as a fulcrum for the opening 3.
The support column 32 rotates in the direction of opening 1a. The support column 32 is rotated to a vertical position, and the slide shaft 34 is inserted into the through holes 31a and 32a provided in the upper portion of the frame 31 and the support column 32.
The column 32 is fixed to the frame 31 by inserting from the side of the frame 31 and tightening the retaining knob bolt 35 of the slide shaft 34 from the front of the frame 31. When the knob bolt 35 is loosened and the slide shaft 34 is pulled out from the lateral direction, the support column 32 becomes rotatable.

[0004]

Conventionally, three steps (tightening and loosening of the knob bolt 35, insertion / removal of the slide shaft 34, and rotation of the column 32) were required for the rotation and fixing operations of the column 32, which was troublesome.

Further, the slide shaft 34 is inserted through the through hole 31.
through holes 31a, 32a for inserting / removing into / from a, 32a
If the hole diameter is substantially the same as that of the slide shaft 34, it becomes difficult to insert the slide shaft 34. If the through holes 31a and 32a are made larger than the slide shaft 34,
Due to the gap between the slide shaft 34 and the through holes 31a and 32a, the support column 32 rattles.

Furthermore, if you forget to tighten the knob bolt 35,
When the slide shaft 34 gradually slips out due to vibration during processing, and the slide shaft 34 slips out of one of the through holes 31a of the frame 31, bending stress is applied to the slide shaft 34 and the slide shaft 34 is damaged. Further, if the slide shaft 34 is forgotten to be inserted, the frame 31 is supposed to be supported by both ends, but the frame 31 is supported by a cantilever, and there is a problem that the frame 31 is damaged by a reaction force during shearing. Further, in order to prevent the above-mentioned damage, a detector for detecting the fitted state of the slide shaft 34 and the through holes 31a, 32a is provided, and the shearing of the structure that cannot be sheared unless the slide shaft 34 is securely inserted. Although there is a processing machine, it requires a detector and a control device, resulting in high cost.

It is an object of the present invention to provide a shearing machine which eliminates the above-mentioned drawbacks of the prior art, improves the workability when rotating the column, and can fix the column with high reliability.

[0008]

SUMMARY OF THE INVENTION The above object is the post top
The eccentric shaft is rotatably supported and the eccentric shaft is attached to the frame.
Part of the eccentric shaft when the
This is achieved by providing an abutting portion that is pressed .

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention is shown in FIGS.
Will be explained. 1 is a perspective view of a shearing machine showing an embodiment of the present invention, FIG. 2 is a partial sectional perspective view of FIG. 1, and FIG.
Is a side view of the shearing machine, FIG. 4 is a side view of the notcher die, FIGS. 5 and 6 are cross-sectional side views around the pin, and FIGS. 7 and 8 are cross-sectional side views around the flat hole of the eccentric shaft, and FIG. 12 is a side view showing an operation of opening the column, FIG. 10 is a side view showing an operation of closing the column, FIG. 11 is a perspective view at the time of rotating the knob, and FIG.
FIG. 13 is a perspective view of a pillar rotating operation, and FIG. 13 is a perspective view showing a state where the mold is replaced.

In FIG. 1, reference numeral 1 is a C-shaped frame having columns 2 and 2 in front of an opening 1a of the frame 1. In order to change the mold and to put in and take out the material 4 such as angle steel material, the column 2 is oriented in the direction of opening the opening 1a with the shaft 3 provided at the lower end of the frame 1 as a fulcrum (broken line position in FIG. 3). The pillar 2 rotates.

In FIG. 3, a hydraulic cylinder 5 is provided above the frame 1, and a piston rod 5a provided in the hydraulic cylinder 5 slides vertically. Piston rod 5
A table 6 for installing the mold 13 is provided below a. A hydraulic pump unit 7 is attached to the back surface of the frame 1, and the inside of the hydraulic pump unit 7 includes a hydraulic pump 8, an oil tank 9, and a motor 10 for the hydraulic pump 8.
Is equipped with. The hydraulic pump 8 is connected to the hydraulic cylinder 5 via a hydraulic hose 11. The foot switch 12 is connected to the hydraulic pump unit 7, and the motor 10 is driven by turning on the foot switch 12, and the hydraulic pump 8 operates the piston rod 5 a of the hydraulic cylinder 5. A die 13 for shearing the material 4 is placed on the table 6.
Is provided. In this embodiment, a die (hereinafter referred to as a notcher die 13) that cuts the material 4 into a V shape is attached.

The structure of the notcher die 13 will be described with reference to FIG. A movable portion 16 which is vertically movable by two guide shafts 15 is provided on the fixed portion 14, and a movable portion 16 is fixed to the upper end of the guide shaft 15 by a washer 17 so as not to come out upward. On the outer periphery of the guide shaft 15, a spring 18 that normally biases the movable portion 16 upward so that the movable portion 16 abuts on the washer 17 is provided. A push blade 19 arranged in a V shape is attached to the lower end of the movable portion 16, and a receiving blade 20 notched in a V shape is attached on the fixed portion 14 so as to face the push blade 19, and the push blade 19 and the receiving blade 20 are attached. Is configured to have a predetermined clearance. A pressing plate 21 for positioning and fixing the material 4 is provided on the base 6, and the clamping screw 22 is attached to the pressing plate 21.
Insert the clamp screw 22 into the fixing portion 14
The pressing plate 21 is clamped and fixed to the fixing portion 14 by screwing it into.

Next, the shearing process of the material 4 will be described. The pressing plate 21 is moved by the space of the material 4 to be inserted, and the material 4 is inserted from the lateral direction with respect to the front surface of the frame 1. Then, the side surface of the material 4 is brought into contact with the pressing plate 21 and the clamp screw 22 is tightened, whereby the material 4 is set in the notcher mold 13.

When the foot switch 12 is operated, the motor 10 is driven to send hydraulic oil from the hydraulic pump 8 to supply / discharge the hydraulic oil to / from the hydraulic cylinder 5 above the frame 1 via the hydraulic hose 11 and the piston rod 5a in the hydraulic cylinder 5. To lower. The piston rod 5a pushes down the movable portion 16 and presses the material 4 with the pushing blade 19 and the receiving blade 20,
The material 4 is sheared.

2, FIG. 5, and FIG. 6, an eccentric shaft 23 is rotatably provided on the upper portion of the column 2, and the eccentric shaft 23 is provided.
Is provided with an eccentric portion 23a which is eccentric by a predetermined amount with respect to the rotation fulcrum of the eccentric shaft 23. Further, at both ends of the eccentric shaft 23, knobs 24, 24 for rotating the pillar 2 and rotating the eccentric shaft 23 are provided. On the upper portion of the frame 1, a groove portion 1b which is a contact portion of the eccentric portion 23a is formed. The eccentric portion 23a of the eccentric shaft 23 presses the groove portion 1b at a predetermined angle by a predetermined amount by rotating the knobs 24, 24 to fix the column 2 to the frame 1.

A pin 25 is projectingly provided on the outer periphery of the eccentric portion 23a, and the frame 1 is provided with a restricting surface 1c and a restricting surface 1d which come into contact with the pin 25. These regulatory surfaces 1c, 1
The d and the pin 25 serve as rotation direction regulation means for regulating the rotation direction of the eccentric shaft 23, and make the direction of the rotation operation of the eccentric shaft 23 the same as the rotation direction of the column 2. That is,
As shown in FIG. 5, when the column 2 is rotated rightward and the eccentric portion 23a of the eccentric shaft 23 presses the groove portion 1b, the pin 25 abuts on the restriction surface 1c and the eccentric shaft 23
Regulates the right rotation of. Further, as shown in FIG. 6, in order to rotate the support column 2 to the left, the knobs 24, 24 are rotated counterclockwise, and when the eccentric portion 23a of the eccentric shaft 23 is separated from the groove portion 1b, the pin 25 is restricted by the regulating surface. The eccentric shaft 23 is prevented from turning counterclockwise by coming into contact with 1d.

Within the rotation range of the eccentric shaft 23,
The flat hole 2 has an angle to hold the turning position of the eccentric shaft 23.
3b and 23c are provided. In this embodiment, the flat hole 23
b and 23c are formed every 180 degrees. On the other hand, prop 2
A ball 27 that is pressed by the spring 26 toward the flat holes 23b and 23c is provided in the. The ball 27, the flat holes 23b and 23c, and the spring 26 serve as a rotation positioning means for the eccentric shaft 23.
When the ball 27 coincides with either one of the flat holes 23b and 23c which moves opposite to the ball 27 by the rotation of 3, the spring 26 causes the ball 27 to move into the flat hole 23b,
23c, and the turning load of the eccentric shaft 23 is temporarily increased, so that the eccentric shaft 23 is held at the turning angle.

The rotating operation of the support column 2 in the above structure will be described. When the support column 2 is closed as shown in FIG. 1, that is, when the support column 2 is fixed to the frame 1 in the vertical position, the eccentric portion 2 of the eccentric shaft 23 as shown in FIG.
3a presses the groove portion 1b of the frame 1. Eccentric part 2
The upper part of the frame 1 is pressed downward by a predetermined amount by the pressing of 3a. The pin 25 contacts the regulation surface 1c and regulates the eccentric shaft 23 so as not to rotate further to the right. Further, as shown in FIG. 7, the ball 27 is engaged with the flat hole 23b of the eccentric shaft 23, and the eccentric shaft 23
Holds the rotational position of.

In the operation of opening the column 2, that is, the operation of rotating the column 2 from the vertical position to the left, first, as shown in FIG.
Hold the knobs 24, 24 with both hands like 0, and rotate the knobs 24, 24 in the left direction (direction of arrow a) as shown in FIG.
At this time, since the pin 25 is on the regulating surface 1c side, the eccentric shaft 23 can rotate only in the arrow a direction. Knob 2
When 4, 24 are turned, the biasing force of the spring 26 is resisted and the ball 27 slips out of the flat hole 23b. further,
When the knobs 24, 24 are rotated, the pin 25 engages with the flat hole 23c as shown in FIG. 8, and the rotating position of the eccentric shaft 23 is held. Then, as shown in FIG. 6, the eccentric portion 23a of the eccentric shaft 23 separates from the groove portion 1b of the frame 1,
The fixed state of the column 2 is released. As shown in FIG.
In this state, while holding the knobs 24, 24, the column 2 is rotated (tilted) to the horizontal position in the left direction (direction of arrow b in FIG. 9) in the same direction as the rotation direction of the knobs 24, 24. As a result, the opening 1a of the frame 1 is opened. In this state, as shown in FIG. 13, exchange with another die 28, material 4
Put in and take out. Rotation direction of the knobs 24, 24 (arrow a
Since the direction) and the direction for opening the support column 2 (the direction of arrow b) are aligned, they can be opened by a series of operations. In addition, flat hole 23
The position of the eccentric shaft 23 is held by b and the ball 27, and the knobs 24, 24 do not move during the opening of the support column 2 and stable rotation is possible.

In order to process the material 4, when the pillar 2 is closed, or when the pillar 2 is rotated rightward from the horizontal position, the pin 25 is engaged with the flat hole 23c and the rotation of the eccentric shaft 23 is held. In this state, the knobs 24, 24 are held by both hands, and the column 2 is rotated (raised) to the vertical position in the right direction (arrow c direction) as shown in FIG. When the eccentric shaft 23 moves onto the frame 1, the knobs 24, 24 are rotated in the right direction (the arrow d direction) in the same direction as the rotation direction of the support column 2. At this time, since the pin 25 is on the regulating surface 1d side, the knobs 24, 24 rotate only in the arrow d direction. As a result, the eccentric portion 23a of the eccentric shaft 23 presses the groove portion 1b of the frame 1, and the support column 2 is fixed to the frame 1. Since the closing direction of the support column 2 (direction of arrow c) and the rotating direction of the knobs 24, 24 (direction of arrow d) are matched, it can be closed by a series of operations.

Further, if the pillar 2 is temporarily closed, the knobs 24, 24 are
Even if the material 4 is processed without rotating (the eccentric portion 23a does not press the groove portion 1b), the upper portion of the frame 1 is slightly bent by the amount of the eccentric portion 23a of the eccentric shaft 23. 1b contacts the eccentric shaft 23 and prevents the frame 1 from being further bent, so that the frame 1 is not damaged.

[0022]

According to the present invention, the support can be opened and closed by the eccentric shaft only by rotating the knob, the frame can be pressed by a predetermined amount, and the support can be fixed with a structure without play. Even if the eccentric shaft is not rotated and the column is set on the frame, the eccentric shaft and the abutting part will contact after the upper part of the frame is deflected by a predetermined amount, so the frame will not be damaged. Since a detector such as a micro switch is unnecessary, it can be provided at a low cost.

Further, since the restricting means for restricting the rotating direction of the eccentric shaft is provided so that the rotating direction of the knob and the opening / closing direction of the support column can be matched to perform a series of operations, the rotating direction of the eccentric shaft is wrong. There is no need for two steps, and the pillar can be opened and closed more reliably with a series of operations.

Furthermore, since the rotation positioning means for the eccentric shaft is provided, the eccentric shaft does not move when the support column is opened and closed, and stable opening and closing can be performed.

[Brief description of drawings]

FIG. 1 is a perspective view of a shearing machine showing an embodiment of the present invention.

FIG. 2 is a partial cross-sectional perspective view of FIG.

FIG. 3 is a side view of a shearing machine.

FIG. 4 is a side view of a notcher die.

FIG. 5 is a sectional side view of the periphery of the pin.

FIG. 6 is a cross-sectional side view around the pin.

FIG. 7 is a sectional side view of the eccentric shaft in the vicinity of a flat hole.

FIG. 8 is a sectional side view of the eccentric shaft in the vicinity of a flat hole.

FIG. 9 is a side view showing an operation of opening the support column.

FIG. 10 is a side view showing an operation of closing the support column.

FIG. 11 is a perspective view of the knob when it is rotated.

FIG. 12 is a perspective view of a pillar rotating operation.

FIG. 13 is a perspective view showing a state where the mold is replaced.

FIG. 14 is a front view of a conventional shearing machine.

FIG. 15 is a front view when the slide shaft is moved in FIG.

FIG. 16 is a side view of FIG.

[Explanation of symbols]

1 ... Frame, 1b ... Groove portion, 1c, 1d ... Restricting surface, 2 ...
Prop, 23 ... Eccentric shaft, 23a ... Eccentric part, 23b,
23c ... Sara hole, 24 ... Knob, 25 ... Pin, 26 ... Spring, 27 ... Ball.

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-63-72434 (JP, A) JP-B-50-14392 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) B23D 15/00-33/00 B30B 1/32 B30B 15/04 B21D 7/00

Claims (5)

(57) [Claims] 1. A central portion shearing machine were provided with rotatable strut lower end of the frame in the opening front face of the frame of the open C-shape as a fulcrum, polarized to the strut top
The core shaft is rotatably supported and the frame is
When the eccentric shaft is
Shearing characterized by the provision of an abutting part that is pressed in part
Processing machine . 2. A knob capable of rotating the eccentric shaft.
And a part of the eccentric shaft is provided with the flare.
When pressing the abutment part of the
A rotation direction regulating means for restraining the eccentric shaft.
Before releasing the state where the part presses the contact part of the frame
Open the opening of the frame and the rotation direction of the knob
The shearing machine according to claim 1 , wherein the rotation direction in which the support column rotates is matched . 3. A pin provided with the rotation direction restricting means at an appropriate position of the eccentric shaft, and the frame which can contact the pin.
The shearing machine according to claim 2, wherein the shearing machine is configured with a restriction surface provided at an appropriate position of the arm . 4. The shearing machine according to claim 1, further comprising positioning means for positioning the rotation of the eccentric shaft at a predetermined position. 5. A plurality of flat holes provided with the positioning means on the eccentric shaft at a predetermined angle, a ball provided on the column so as to correspond to any one of the flat holes, and the ball. The shearing machine according to claim 4, wherein the shearing machine is constituted by a spring that presses against the eccentric shaft.