JP2003136145A - Bending apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assure a safety of a worker and improve a machining efficiency in a bending apparatus having a bar pedal even if the worker puts his foot on the bar pedal by accident to prevent any erroneous operation while a ram is not energized. SOLUTION: There is provided a bending machine 1 having a bar pedal 2 for use in energizing a ram 20 under a longitudinal extension at a table 21. At the predetermined positions, the bar pedal 2 is provided with worker treading amount sensor members M1, M2,...Mn for use in detecting the treading of the worker.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending apparatus, and more particularly to a bending apparatus having a bar pedal for starting a ram.

[0002]

[Prior art]

Conventionally, a bending apparatus, for example, a press brake (FIG. 9), in the case of a descending type, has side plates 50 on both sides.
It has an upper table 51 which moves up and down by a hydraulic cylinder 53 attached to the upper table 51 and a lower table 52 immediately below the upper table 51.

A punch P is formed on the upper table 51.
However, the die D is mounted on the lower table 21,
A bar pedal 55 extending in the longitudinal direction is attached to the lower table 21.

With this structure, when the worker T puts the work W on the die D, positions the work W by abutting against the abutment 54, and then depresses the bar pedal 55, the hydraulic cylinder 53 is driven and the ram moves. A certain upper table 51 descends, and the work W is subjected to a predetermined bending process in cooperation with the punch P and the die D.

[0006]

[Problems to be Solved by the Invention]

However, in the prior art (FIG. 9), as described above, the bar pedal 55 extends in the longitudinal direction of the lower table 52.

Therefore, a third party other than the worker T may erroneously step on the bar pedal 55.

This also applies when a plurality of workers T jointly work on a large work W, and the bar pedal 55 may be accidentally stepped on.

Further, even in the case of a step bend in which the work W is processed while being positioned at a mold station which is a predetermined mold attachment position, the bar pedal 55 may be erroneously stepped on.

For example, as shown in FIG.
In the first bending order 1 to place the work W in the die station ST
Mold station ST2 after moving to No.
To the mold station ST4 in the bending order 3 and then in the final bending order 4 in the mold station ST3.
Let's move to.

In this case, since the worker T is distracted by the workpiece W he is holding, for example, when moving from the mold station ST1 to ST2 or when returning from the mold station ST4 to ST3. , Accidentally bar pedal 5
Sometimes you step on zero.

That is, conventionally, there is a problem that the bar pedal 50 is stepped on when it should not be stepped on.

As a result, the ram 51 malfunctions, and the ram 51 descends, causing a very dangerous situation for the worker T. Further, a predetermined product is not machined, and the machining must be redone. Is falling.

An object of the present invention is to ensure the safety of a worker in a bending apparatus equipped with a bar pedal, by preventing the ram from starting even if the worker accidentally steps on the bar pedal to prevent a malfunction. And improving the processing efficiency.

[0016]

In order to solve the above problems, the present invention provides a table 21 as shown in FIGS.
A bar pedal 2 that extends in the longitudinal direction to activate the ram 20
In the bending machine 1 provided with the bending machine 1, a bending apparatus, characterized in that worker depression detection members M1, M2 ... Mn for detecting the depression of the operator are provided at predetermined positions of the bar pedal 2. 21 In the bending machine 1 provided with the bar pedal 2 extending in the longitudinal direction and activating the ram 20, a plurality of worker stepping detection members M1 provided at predetermined positions of the bar pedal 2 for detecting the stepping of the operator, M2 ... Mn and worker depression detecting member determining means 4C for deciding a necessary one of the plurality of worker depression detecting members M1, M2 ... Mn for each bending order, and each bending order. Mn is provided with ram control means 4B for activating the ram 20 only when the worker depresses the predetermined worker depression detection members M1, M2, ... Mn. It takes the following technical measures that that bending apparatus.

According to the present invention described above, when the worker depression detecting members M1, M2, ... Mn are constituted by mat switches, after inputting product information (step 101 in FIG. 7),
For example, in the case of the automatic mode (down arrow of step 102 in FIG. 7), when the bending order, the mold, and the die layout are automatically determined (step 103 in FIG. 7), the bending orders 1, 2,
3 (for example, FIG. 5 (A)) according to the mold station ST
Since 2, ST3 and ST1 are determined, mat switches M4, M6 and M1 are automatically determined corresponding to the mold stations ST2, ST3 and ST1 (step 104 in FIG. 7).

Therefore, even if the operator accidentally depresses the bar pedal 2, unless the operator depresses a predetermined mat switch M4, M6, M1 (for example, FIG. 5A) determined for each bending order (FIG. 5A). The NO) ram in step 108 of step 7 does not start, which prevents malfunctions, ensures the safety of the operator, and improves the processing efficiency.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the accompanying drawings by way of embodiments. FIG. 1 is an overall view showing an embodiment of the present invention.

The bending apparatus shown in FIG. 1 is, for example, a press brake.

This press brake has side plates 22 on both sides of the machine body, and hydraulic cylinders 5 are provided on the side plates 22.
When the hydraulic cylinder 5 is operated, the upper table 20 on which the punch P is mounted, that is, the ram 20 is attached.
Is designed to move up and down.

A lower table 21 on which the die D is mounted is provided below the side plate 22, and an abutment 23 is arranged behind the lower table 21 (FIG. 4) to start processing. (Step 106 in FIG. 7)
The workpiece W is brought into contact with the workpiece 3 for positioning.

Further, as shown in the drawing, a bar pedal 2 is provided below the lower table 21 (FIG. 1), and the bar pedal 2 extends in the longitudinal direction (X-axis direction) of the lower table 21.

The bar pedal 2 is formed in a U shape when viewed from above (FIG. 3), and shafts 7 on both sides thereof are supported by a support plate 6 fixed to a lower table 21.

A mounting plate 8 is fixed to the lower table 21 portion immediately below the bar pedal 2 (FIG. 2). A limit switch LS is mounted on the mounting plate 8 and one end of the spring 3 is attached. It is attached, and the other end of the spring 3 is attached to the lower surface of the bar pedal 2.

As a result, the bar pedal 2 (FIG. 4) is normally urged upward by the restoring force of the spring 3.
When stepped on by an operator, it swings downward against the restoring force of the spring 3.

Then, only when the limit switch LS is turned on (YES in step 108A of FIG. 8) and a predetermined mat switch described later is turned on (FIG. 8).
), The ram 20 is activated (YES in step 108 of FIG. 7 → step 109).

Further, worker depression detection members M1, M2, ... Mn are provided at predetermined positions on the upper surface of the bar pedal 2 (FIG. 2) along the longitudinal direction (FIG. 1).

The worker depression detecting members M1, M2
..A plurality of Mn are provided to detect the stepping of the operator and are configured by, for example, a mat switch.

The mat switches M1, M2 ... Mn
As is well known, the NC device 4 used for opening and closing an automatic door, etc. converts pressure fluctuation when an operator depresses it into an electric signal S1 and uses the electric signal S1 as an ON signal to be described later. Send to.

With this configuration, after the machining is started (step 106 in FIG. 7), the operator depresses the bar pedal 2 to turn on the limit switch LS and the predetermined mat switch only as described above ( 8), it is determined that the predetermined mat switch has been depressed (YES in step 108 of FIG. 7), and the ram 20 is activated (step 109 of FIG. 7).

Further, the mat switches M1 and M2.
.. in the vicinity of Mn (FIG. 2), for example, on the lower table 21 side so that the operator can easily see it, the stepping guide member F1,
F2 ... Fn are provided (FIG. 3).

The stepping guide member is a predetermined mat switch M4 for each bending order, which is determined by the operator stepping detection member determining means 4C which will be described later.
The positions of M6 and M1 (for example, FIG. 5A) are clearly indicated.

Thereby, for example, the stepping guide member F
4, F6, F1 have a function of guiding the predetermined mat switches M4, M6, M1 determined according to the bending order so that the operator can easily step on them.

The stepping guide members F1, F2 ... F
n is composed of, for example, a light emitting diode (LED), and is turned on (step 107 in FIG. 7) or turned off (step 111 in FIG. 7) by the LED driving means 4D (FIG. 1) described later.

The NC device 4 of the press brake having such a structure (FIG. 1) includes a CPU 4A and a ram control means 4
B, worker depression detection member determination means 4C, LED
Driving means 4D, bending order etc. determining means 4E, and input means 4
F, output means 4G, and storage means 4H.

The CPU 4A controls the entire apparatus shown in FIG. 1, such as the ram control means 4B, the operator depression detecting member determining means 4C and the LED driving means 4D, in accordance with the operation procedure (FIG. 7) for carrying out the present invention.

The ram control means 4B controls the starting of the ram 20, and, for example, predetermined mat switches M4, M6, M1.
If it is determined that the ram has been depressed (YES in step 108 of FIG. 7), the ram 20 is lowered (step 109 of FIG. 7).

The worker depression detecting member determining means 4C (FIG. 1) comprises a plurality of worker depression detecting members M1 and M2.
... Mn, that is, a plurality of mat switches M1 and M2
.. Determine the required Mn for each bending order.

In this case, the worker depression detecting member determining means 4C is, for example, "0" via the input means 4F described later.
When "1" is input, it is determined to be the automatic mode and "0" is input.
If "2" is input, it is determined to be the manual mode (step 102 in FIG. 7).

When it is determined that the automatic mode is selected (down arrow in step 102 of FIG. 7), the worker stepping detection member determining means 4C drives the bending order etc. determining means 4E (FIG. 1) to change the bending order. , Mold, and mold layout are determined (step 103 in FIG. 7).

As a result, the bending stations 1, 2 and 3 (for example, FIG. 5A) are followed by the die stations ST2 and ST.
3, ST1 is also determined.

Therefore, the worker stepping-in detection member determining means 4C (FIG. 1) is adapted to the die station ST determined above.
2, mat switch M4, M corresponding to ST3, ST1
6, M1 is determined (step 104 in FIG. 7).

In this case, the worker depression detecting member determining means 4C (FIG. 1), for example, as shown in FIG. 5 (B), the mat switches M4, M6 closest to the predetermined mold stations ST2, ST3, ST1. , M1 are determined as predetermined mat switches.

Then, the worker depression detecting member determining means 4C determines the predetermined mat switch M thus determined.
4, M6 and M1 (FIG. 5 (A)) are stored in the storage means 4H (FIG. 1) described later as a database together with the corresponding bending order and the mold stations ST2, ST3 and ST1 (FIG. 1).

Further, the worker depression detecting member determining means 4
When C is the manual mode (FIG. 1), when it is determined to be the manual mode (the right arrow in step 102 in FIG. 7), the operator inputs the bending order and the like (step 113 in FIG. 7) and a predetermined mat is set for each bending order. When the switch number ,, is input (step 114 in FIG. 7), the number is changed to (FIG. 6A).
Corresponding predetermined mat switches M5, M6, M2 are determined.

Then, the worker depression detecting member determining means 4C determines the predetermined mat switch M thus determined.
Similarly, 5, M6, and M2 (FIG. 5A) are stored in the storage means 4H (FIG. 1) as a database together with the corresponding bending order and die stations ST2, ST3, and ST1.

In the case of this manual mode, each operator has his / her dominant foot (right foot or left foot), and even in the same die station, the mat switch to be determined differs depending on the operator's dominant foot. , Input each number arbitrarily.

For example, in the case of FIG. 6 (B), the dominant foot of the operator is the right foot, and therefore, this operator has the bending order 1
It is desired to use the mat switch M5 for the die station ST2, the mat switch M6 for the die station ST3 having the bending order 2, and the mat switch M2 for the die station ST1 having the bending order 3.

Therefore, as shown in the figure, the operator displays the numbers for displaying the mat switches M5, M6, M2,
Are input via the input means 4F (FIG. 1), the worker depression detecting member determining means 4 which has detected them is input.
C is the mat switch M5, M6 corresponding to the number,
M2 is determined for each of the bending orders 1, 2, and 3 (FIG. 6A).

The LED driving means 4D has predetermined depression guide members F4, F6 corresponding to the predetermined mat switches M4, M6, M1 (for example, FIG. 5A) determined by the worker depression detection member determining means 4C. , F1 or L
The ED is turned on (step 107 in FIG. 7) or turned off (step 111 in FIG. 7).

In this case, when the processing is started (step 106 in FIG. 7), the LED driving means 4D causes the storage means 4H to operate.
A predetermined mat switch for each bending order stored in is searched (FIG. 5 (A) or FIG. 6 (A)), and the corresponding LED is turned on to guide the operator's depression (step 107 in FIG. 7). ).

However, the LED driving means 4D (FIG. 1)
A predetermined mat switch is depressed (step 1 in FIG. 7).
08: YES), the ram 20 descends (step 1 in FIG. 7).
09), when the bending process is performed (step 110 in FIG. 7), the predetermined LED that has been turned on is turned off (step 111 in FIG. 7), and the operator does not accidentally step on the same mat switch. To do so.

The bending order determining means 4E (FIG. 1) determines the bending order, the mold, and the mold layout based on the product information in the automatic mode (down arrow in step 102 of FIG. 7) (FIG. 1). 7), and the D and L values are also calculated to determine (step 105 in FIG. 7).

The input means 4F (FIG. 1) is an external lower NC.
Product information (for example, CAD information) is input from the device, and the input product information is temporarily stored in the storage means 4H.

Further, in the input means 4F, the operator inputs the setting of whether the input mode is the automatic mode or the manual mode by a key or the like.

For example, when the automatic mode is set by the operator inputting "01" with the key (see FIG. 7).
If the operator inputs only the bending angle of the work W, the bending order determining unit 4E causes the bending order, the die, and the die layout (step 103 in FIG. 7). Further, the D value, the L value (step 105 in FIG. 7) and the like are automatically determined.

In this case, since the die station for each bending order is determined as described above (FIG. 5 (A)), the operator stepping-in detection member determining means 4C causes the die station (see FIG. 5 (B)). )) Is determined as a predetermined mat switch for each bending order (FIG. 7).
Step 104).

When the manual mode is set by the operator inputting "02" with the key (the right arrow in step 102 of FIG. 7), the operator then bends,
A die and a die layout are input (step 113 in FIG. 7), and as described above, a predetermined mat switch number is input for each bending order (step 11 in FIGS. 6 and 7).
4), and further input D value, L value, Y value, etc. (FIG. 7).
Step 115).

In this case, as described above, the operator inputs the number of the mat switch to be used in consideration of his / her dominant foot (FIG. 6 (B)) (FIG. 6 (A)). , The worker depression detecting member determining means 4 which has detected it
C is the mat switch M5, M6 corresponding to the number,
M2 is determined for each bending order 1, 2, 3.

The output means 4G is formed of a liquid crystal or the like, and the operator confirms the input operation in the automatic mode or the manual mode on the screen, or confirms the input data in the manual mode. .

As described above, the storage means 4H stores a predetermined mat switch (FIG. 5 (A), FIG. 6) for each bending order determined by the worker depression detecting member determining means 4C.
(A)) is stored as a database, and these databases are used when the ram control means 4B (FIG. 1) determines whether or not a predetermined mat switch has been depressed (step 108 in FIG. 7). To be

Further, in the storage means 4H, all the mat switches M1, M2 ... M at predetermined positions on the bar pedal 2 are stored.
The relationship between n and (FIG. 3), its number, and the corresponding stepping guide members F1, F2 ... Fn is stored as a database.

Thereby, for example, the LED driving means 4D
After the start of processing (step 106 in FIG. 7), the storage means 4
A predetermined LED is turned on by searching for H and detecting the mat switch to be stepped on by the operator and the LED corresponding thereto (step 10 in FIG. 7).
7).

The operation of the present invention having the above configuration will be described below.
It will be described with reference to FIG.

(1) Operation until a predetermined mat switch is determined for each bending order.

In step 101 of FIG. 7, product information is input, and in step 102, it is determined whether the mode is the automatic mode or the manual mode.

In this case, when the operator inputs "01" through the input means 4F (FIG. 1), when the operator inputs "02" in the automatic mode (down arrow of step 102 in FIG. 7). Is in manual mode (right arrow in step 102 of FIG. 7)
If so, the CPU 4A that has detected it performs the following control operation.

(1) -In the automatic mode. In step 103 of FIG. 7, a bending order, a die, and a die layout are determined, and in step 104, predetermined mat switches M4, M6, and M1 are determined for each bending order,
In step 105, the D value and the L value are calculated.

That is, C which is detected to be in the automatic mode
The PU 4A (FIG. 1) notifies the worker depression detecting member determining means 4C and the bending order determining means 4E.

As a result, first, the bending order determining means 4E is determined.
However, the bending order and the like are determined, and at that time, the mold stations ST2, ST3, and ST1 are determined for each bending order (FIG. 5 (A)). The person stepping-on detection member determining means 4C causes the mat switch M closest to the die stations ST2, ST3, ST1.
4, M6 and M1 (FIG. 5 (B)) are determined as predetermined mat switches.

Then, the determined predetermined mat switch M
4, M6 and M1 (FIG. 5A) are stored in the storage means 4H together with the bending order and the die stations ST2, ST3 and ST1.

(1) -In case of manual mode. In step 113 of FIG. 7, the bending order, the die, and the die layout are input, in step 114, the numbers of predetermined mat switches M5, M6, and M2 are input for each bending order, and in step 115, the D value, Enter the L and Y values.

That is, C which has detected that it is in the manual mode
The PU 4A (FIG. 1) notifies the worker stepping detection member determination means 4C.

As a result, the operator's stepping detection member determining means 4C allows the operator to input the bending order and the like, and further consider his / her dominant foot (FIG. 6 (B)) to use the mat switch. No. ,, ((Fig. 6
(A)) When input, the predetermined mat switches M5, M6, M2 corresponding to the number are determined.

Then, the determined predetermined mat switch M
5, M6 and M2 (FIG. 6A) are similarly stored in the storage means 4H together with the bending order and the die stations ST2, ST3 and ST1.

(2) Predetermined mat switch depression operation.

In step 106 of FIG. 7, processing is started, in step 107, a predetermined LED is turned on, and in step 108, it is determined whether or not a predetermined mat switch is depressed. (NO), returns to step 107, repeats the same operation, and if depressed (YES), step 109
At, the ram 20 is lowered.

That is, as described above, in the automatic mode or the manual mode, when the worker depression detecting member determining means 4C (FIG. 1) determines a predetermined mat switch for each bending order (FIG. 5 (A)). ) Or FIG. 6 (A)), CP
U4A (FIG. 1) turns on a predetermined LED via the LED driving means 4D.

The worker who sees the illuminated LED depresses the bar switch 2 by depressing the mat switch in the vicinity guided by the LED.

Then, the CPU 4A (FIG. 1) first determines whether or not the limit switch LS is on (step 108A in FIG. 8), and if it is on (YE
S) Next, it is determined whether or not a predetermined mat switch is turned on (step 108B in FIG. 8).

For example, when the predetermined mat switches M4, M6, M1 are determined by the automatic mode (FIG. 5 (A)), in the bending order 1, the die station ST is used.
For No. 2, the predetermined mat switch M4 must be depressed.

In this state, when the CPU 4A (FIG. 1) determines that the mat switch M2 is on, even if the limit switch LS is on, this is
At this time, the ram 20 is not lowered because it is not a predetermined mat switch.

In this way, the operator accidentally mistakes the bar pedal 2
Even if the user steps on the ram, the ram does not start unless the predetermined mat switch determined for each bending order, for example, M4 (FIG. 5 (A)) is stepped on. Therefore, according to the present invention, malfunction is prevented. Therefore, it is possible to secure the safety of the operator and improve the processing efficiency.

However, when the CPU 4A determines that the limit switch LS is on and the mat switch M4 is on, this is the predetermined mat switch, and at this time, the predetermined switch is not set. It is determined that the mat switch M4 has been depressed.

At this time, the CPU 4A (FIG. 1) sends the control signal S2 to the ram control means 4B to drive the hydraulic cylinder 5 and lower the ram 20.

(3) Bending operation.

Bending is performed in step 110 of FIG. 7, and predetermined LEDs are turned off in step 111.

That is, as described above, it is determined that the predetermined mat switch has been depressed (step 10 in FIG. 7).
8), when the ram 20 descends (step 109 in FIG. 7), the punch P and the die D cooperate with each other to previously strike 2
A predetermined bending process is applied to the work W positioned in contact with the workpiece 3 (FIG. 4).

Then, for example, bending order 1 (FIG. 5 (A))
When the bending process is performed on the above, the CPU 4A (FIG. 1) turns off the predetermined LED that has been turned on this time via the LED driving means 4D so that the operator does not step on the same mat switch.

Then, in step 112 of FIG.
It is determined whether or not all the machining is completed. If not completed (NO), the process returns to step 106 to repeat the same operation, and if completed (YES), all the operations are completed (END).

[0092]

As described above, according to the present invention, even if the operator erroneously steps on the bar pedal, the ram does not start unless the predetermined mat switch determined for each bending order is stepped on. Malfunctions are prevented, and the technical effects of ensuring the safety of the worker and improving the processing efficiency are achieved.

Further, by providing a stepping guide member (for example, LED) near the predetermined mat switch,
There is also an effect that the worker can definitely step on the predetermined mat switch while being guided by the lighted LED.

[0094]

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is a plan view showing an embodiment of the present invention.

FIG. 4 is a side view showing an embodiment of the present invention.

FIG. 5 is an explanatory diagram of an automatic mode according to the present invention.

FIG. 6 is an explanatory diagram of a manual mode according to the present invention.

FIG. 7 is a flow chart for explaining the operation of the present invention.

FIG. 8 is a detailed view of step 108 in FIG.

FIG. 9 is an explanatory diagram of a configuration of a conventional technique.

FIG. 10 is a diagram illustrating a problem of the conventional technique.

[Explanation of symbols] 1 Bending machine 2 bar pedal 3 springs 4 NC device 4A CPU 4B Ram control means 4C worker stepping detection member determination means 4D LED driving means 4E Bending order etc. determination means 4F input means 4G output means 4H storage means 4J input mode switching means 5 hydraulic cylinder 6 Support plate 7 axes 8 Mounting plate 20 upper table 21 Lower table 22 Side plate 23 Hit D die F1, F2 ... Fn Stepping guide member M1, M2 ... Mn Worker depression detection member LS limit switch P punch W work

Claims (4)

[Claims] 1. A bending machine provided with a bar pedal that extends in a longitudinal direction of a table to activate a ram, wherein a worker depression detecting member for detecting depression of an operator is provided at a predetermined position of the bar pedal. Characteristic bending device. 2. A bending machine provided with a bar pedal that extends in the longitudinal direction of a table to activate a ram, and a plurality of worker depression detecting members provided at predetermined positions of the bar pedal to detect the depression of an operator. An operator depression detecting member determining means for determining a necessary one from the plurality of operator depression detecting members for each bending order; and a predetermined operator depression detecting member determined for each bending order by the operator. A bending apparatus having ram control means for activating the ram only when it is depressed. 3. A limit switch is mounted directly below the bar pedal, and each worker stepping detection member is constituted by a mat switch, and the ram control means turns on both the limit switch and a predetermined mat switch. The bending apparatus according to claim 2, wherein the ram is activated only in the case. 4. The stepping guide member for guiding a predetermined worker stepping detection member determined for each bending order to the operator so as to facilitate the stepping in accordance with the bending order. Bending equipment.