JPH0727052Y2 - Plate support device for shearing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a plate supporting device for supporting a cut-off side of a plate in a shearing machine.

(Prior Art) Explaining a plate supporting device in a conventional shearing machine, a plurality of supporting arms are provided swingably in the vertical direction in order to support the cut-off side of the plate, and the supporting arms are vertically moved. A plurality of pneumatic cylinder devices for swinging in the direction are provided. A flow control valve is connected to the pneumatic cylinder device in order to adjust the speed of the support arm. Therefore, before shearing the plate material, the plurality of support arms are rocked upward so that the horizontal portions of the plurality of support arms are positioned at approximately the same height as the pass line, and the plurality of support arms support the plate material Support the cut-off side.

When the plate is sheared by lowering the ram, the flow control valve and pneumatic cylinder device are appropriately operated to avoid interference between the ram and the plate supported by the support arm. Is swung downward at a predetermined speed. At this time, the air in the pneumatic cylinder device is a compressible fluid, and in order to swing the support arm downward at a predetermined speed, the flow control valve should be operated in an appropriate state according to the weight of the plate material. There is a need to.

(Problems to be solved by the invention) However, it is troublesome to appropriately operate the flow control valve each time the weight of the plate material changes, and when the flow control valve is not properly operated, a plurality of support arms are required. There is a problem in that the plate swings downward at a speed lower than a predetermined speed, and interference occurs between the ram and the plate material supported by the support arm, resulting in dents or the like on the plate material. In addition, when a plurality of support arms swing downward faster than a predetermined speed and shearing is performed in a state where the cut-off side of the plate material is not sufficiently supported, problems such as bending or twisting of the plate material may occur. there were.

In order to solve the above problems, a plate material supporting device using a hydraulic cylinder device and an accumulator connected to the hydraulic cylinder device may be considered instead of a plurality of pneumatic cylinder devices, but there is a problem that the cost increases. .

(Means for Solving the Problems) In view of the conventional problems such as the preceding problems, the present invention is designed to perform shearing by cooperation of a lower blade attached to a work table of a shearing machine and an upper blade attached to a vertically movable ram. In the plate material device for supporting the cut-off side of the plate material, a rotation shaft provided horizontally and extending in the left-right direction is rotatably supported by the frame of the shearing machine, and the cut-off side of the plate material is provided. A plurality of support arms for supporting are provided at appropriate intervals in the longitudinal direction of the rotary shaft, and each support arm is provided so as to be connected to the rotary shaft, and the rotary shafts are rotated to provide the support arms. Is provided with a pneumatic sonder device and a hydraulic cylinder device for swinging up and down, and the piston lots of both cylinder devices are provided by being connected to the rotating shaft, and the upper and lower empty cylinders of the pneumatic cylinder device are provided. The air chamber and the compressed air source are provided so as to be connectable and disconnectable via a directional control valve, and a flow rate control valve is provided in a circuit connecting the hydraulic chamber below the hydraulic cylinder device and the hydraulic / pneumatic pressure converter. When the compressed air source is connected to the lower air chamber of the pneumatic cylinder, the compressed air source and the hydraulic / pneumatic converter are connected, and the upper air chamber of the pneumatic cylinder and the compressed air are connected. When the power source is connected and the support arm is swung downward, oil is returned from the hydraulic chamber of the hydraulic cylinder device to the hydraulic / pneumatic pressure converter via the flow rate control valve.

(Operation) In the above configuration, when the compressed air source is connected to the lower air chamber of the pneumatic cylinder device and the hydraulic air pressure converter is connected to supply the pressure oil to the hydraulic chamber of the hydraulic cylinder device, As the moving shaft is rotated, the support arm swings upward to support the plate material and supports the cut-off side of the plate material.

By appropriately lowering the ram, the plate material is sheared by the cooperation of the upper blade and the lower blade provided on the ram.

At this time, in order to avoid the interference between the plate material supported by the support arm and the ram, the pressure oil of the hydraulic cylinder device connected to the compressed air source via the pneumatic pressure hydraulic converter is transferred to the pneumatic pressure converter. The air chamber of the pneumatic cylinder device connected to the compressed air source is switched upside down and the support arm is swung downward at a predetermined speed. The above-mentioned adjustment of the predetermined speed is performed by a flow control valve that is in contact with a hydraulic cylinder device that mainly uses incompressible oil as a working fluid.

(Example) Hereinafter, the Example which concerns on this invention is described based on drawing.

Referring to FIG. 1, FIG. 2 and FIG. 3, the shearing machine 1 includes left and right side frames 3 and 5, and
An upper front plate 7 and a lower front plate 9 are integrally attached to the upper and lower portions of the side frames 3 and 5, respectively.

The lower front plate 9 is provided with a work table 1 for supporting the plate material, and the work table 11 is provided at the rear part (front part toward the paper surface in FIG. 1, left part in FIGS. 2 and 3) of the work table 11. Is attached with a lower blade 13 extending in the left-right direction (left-right direction in FIG. 1, front-back direction toward paper in FIGS. 2 and 3).

A ram 17 having an upper blade 15 for shearing the plate material in cooperation with the lower blade 13 is provided so as to be vertically movable.

More specifically, the side frames 3 and 5 are provided with rotatable guide rollers 19, and the frame 21 forming a part of the ram 17 is provided with a running portion 23 that is in contact with the guide rollers 19. There is. A drive shaft 25 linked to a drive motor (not shown) is provided in the side frames 3 and 5 so as to extend in the left-right direction, and eccentric plates 27 are integrally attached to both ends of the drive shaft 25. is there. A base portion of a connecting rod 31 is engaged with the eccentric plate 27 via a metal bearing 29. The connecting rod 31 is provided eccentrically with respect to the axis of the drive shaft 25.
The front end of is connected to the frame 21 of the ram 7 via a connecting pin 33.

With the above configuration, by appropriately operating the drive motor, the drive shaft 25 and the eccentric plate 27 rotate, and the connecting rod 31 moves up and down. Therefore, connecting rod
The ram 17 connected to the 31 is guided by the guide roller 19 to move up and down.

A support base 35 is attached to the rear surface of the ram 17 so as to extend rearward, and the support base 35 is provided with a back gauge device 37 for setting the shearing dimension of the plate material. Also,
The upper front plate 7 is provided with a plate pressing device 39 for pressing and fixing the plate material to the work table 11 at the time of shearing. Since the configurations of the back gauge device 37 and the plate pressing device 39 are the same as the conventional configurations, detailed description of the configurations will be omitted.

In order to carry out the sheared plate material to a stacking device (not shown) or the like, the side frames 3, 5 are attached to the lower front plate 9.
A work shooter 43 is provided through a beam member 41 attached to the work shooter 43, and a plurality of openings 45 are provided at appropriate positions of the work shooter 43.

In order to support the cut-off side of the plate material before and during the shearing of the plate material, there is provided a plate material support device 49 provided with a plurality of support arms 47 that can swing in the vertical direction.

Explaining the details of the plate supporting device 49, a rotating shaft 53 is rotatably provided on the rear surface of the lower front plate 9 through a plurality of bearing members 51, and the rotating shaft 53 has a plurality of rotating shafts 53. The support arms 47 are provided at appropriate intervals across the support member 55 in the left-right direction. The support arm 47 has a V shape as shown in FIG. 2, and a plurality of rollers 57 are rotatably attached to the horizontal portion of the support arm 47.

With the above structure, by appropriately rotating the rotary shaft 53, the plurality of support arms 47 swing in the vertical direction as shown in FIG. Therefore, by swinging the support arm 47 upward so that the horizontal portion of the support arm 47 is located at substantially the same height as the pass line PL, the cut-off side of the plate material can be supported, By swinging the support arm 47 downward during shearing, interference between the ram 17, the support arm 47, and the plate material can be avoided.

In order to control the swing range of the plurality of support arms 47 in the vertical direction, stopper devices 59 are provided near both ends of the rotary shaft 53. That is, the stopper bases 61 of the stopper device 59 are integrally attached near the both ends of the rotary shaft 53, and the abutting portions 6 are attached to the stopper bases 61.
3, 65 are provided, and stopper screws 67 are attached to the abutting portions 63, 65, respectively.

In order to rotate the rotary shaft 53 in the plate material support device 49,
The lower front plate 9 has a plurality of pneumatic cylinder devices 69.
(Two on the left and right of the lower front plate 9 in this embodiment)
And a hydraulic cylinder device 71 (one in the center of the lower front plate 9 in this embodiment).

More specifically, the right and left sides of the lower front plate 9,
A fixing member 73 is attached to the center, and a support bracket 75 is attached to each fixing member 73. The right and left support brackets 75 are respectively provided with the pneumatic cylinder device.
69 is swingably provided via a hinge pin 77, and the hydraulic cylinder device 71 is swingably provided on a central support bracket 75 via a hinge pin 79. Coupling members 85 are attached to the tip ends of the piston rods 81 and 83, which are respectively projectable upward from the pneumatic and hydraulic cylinder devices 69 and 71, and the upper end portions of the respective coupling members 85 are connected to each other via a hinge pin 87. It is connected to the tip of the swing arm 89. The base of each swing arm 89 is integrally attached to the rotary shaft 53.

Regarding the circuits of the hydraulic cylinder device 71 and the pneumatic cylinder device 69, referring to FIG. 5, FIG. 1, FIG. 2, and FIG. 3, they are connected to the upper pneumatic chamber 91 of each pneumatic cylinder device 69. The first circuit 93 is connected to the B port of a directional control valve 99 with a solenoid 95 and a spring 97, which is a 5-port 2-position valve.
A first flow rate control valve 101 such as a check valve with a check valve is arranged in the middle of the first circuit 93. Direction control valve 99 above
Is attached to the side frame 3 via a support bracket 103 as shown in FIG.
Is mounted below the directional control valve 99 as shown in FIG.

The second connected to the lower air chamber 105 of each pneumatic cylinder device 69
The circuit 107 is connected to the A port of the directional control valve 99, and a second flow control valve 109 such as a check valve-equipped throttle valve is arranged in the middle of the second circuit 107. The second flow control valve 109 is mounted below the directional control valve 99 as shown in FIG.

The third circuit 111, which is branched and connected between the second flow control valve 109 and the directional control valve 99 in the second circuit 107, is connected to the hydraulic chamber 113 of the hydraulic cylinder device 71, and the third circuit 111
From the hydraulic cylinder device 71 side, a third flow control valve 115 such as a check valve-equipped throttle valve and a pneumatic pressure hydraulic converter 117 are respectively disposed in the cylinder. A silencer 119 is connected to the hydraulic cylinder device 71, and the pneumatic-hydraulic converter 117 is attached to the central portion of the lower front plate 9 via a support bracket 121 as shown in FIG.

Fourth circuit 123 connected to the P port of the direction control valve 99
Is connected to a compressed air source 131 via an oiler 125, a pressure reducing valve 127, and an air filter 129, and a silencer 133 is connected to each of the EA ports of the directional control valve 99.

Further, referring to FIGS. 1 and 4, in order to swing the plurality of support arms 47 downward, the right side of the rotary shaft 53 (left side in FIG. 1, facing the paper surface in FIG. 4). A swing arm 137 having a rotatable roller 135 at its tip is attached to the end (back side), and a pressing member 139 is integrally attached to an appropriate position of the connecting rod 31 on the right side. When the connecting rod 31 descends from the top dead center by a predetermined amount, the pressing member 139 causes the roller 1 to move.
It abuts 35.

With the above structure, by appropriately operating the drive motor, the connecting rod 31 and the pressing member 139 are moved downward, the roller 135 is pressed by the pressing member 139, and the swing arm 137 is moved downward. It is a thing.
Therefore, the rotating shaft 53 appropriately rotates to move the plurality of support arms 47 downward.

The operation of this embodiment will be described based on the configuration described above.

When the solenoid 95 of the directional control valve 99 is excited, the compressed air source 131 causes the air filter 129, the pressure reducing valve 127, and the Euler 1
Compressed air is sent to the second circuit 107 via 25 and to the pneumatic-hydraulic converter 117 via the third circuit 111. The compressed air sent to the second circuit 107 is sent to the lower pneumatic chambers 105 of the pneumatic cylinder devices 69, and the compressed air sent to the hydropneumatic converter 117 is converted into hydraulic pressure. The hydraulic pressure is sent to the hydraulic chamber 113 of the hydraulic cylinder device 71 via the third flow control valve 115.

Therefore, the pneumatic cylinder device 69, the hydraulic cylinder device 71
Piston rod 83 moves upward and the connecting member
The pivot arm 89 pivots upward via 85. As a result, the rotating shaft 53 rotates, and the plurality of support arms 47 rotate upward. Then, the horizontal portions of the plurality of support arms 47 are located at almost the same height as the pass line PL.

Next, while supporting the cut-off side of the plate material by the plurality of support arms 47, the drive motor is appropriately operated to lower the ram 17 located at the top dead center. When the ram 17 falls by a predetermined amount from the top dead center, the solenoid 93 of the directional control valve 99 is demagnetized to connect the A port and the EA port and the B port and the P port. As a result, the compressed air is sent to the upper pneumatic chamber 91 of the pneumatic cylinder device 69 via the first circuit 93 and the compressed air of the lower pneumatic chamber 105 is sent to the second circuit 107. The device 69 causes the pivot shaft 53 to pivot to pivot the support arm 47 downward. Further, the piston rod 83 descends due to the weight of the plate material, the plurality of support arms 47, and the like, whereby the oil in the hydraulic chamber 113 of the hydraulic cylinder device 71 is sent to the pneumatic hydraulic converter 117, and
The compressed air of the pneumatic / hydraulic pressure converter 117 is sent to the third circuit 111. Therefore, the plurality of support arms 47 are
89, it rotates downward via a rotation shaft 53.

The plurality of support arms 47 rotate downward at a predetermined speed in order to avoid interference between the ram 117, the back gauge device 37, etc., the plurality of support arms 47, and the plate material. The above-mentioned adjustment of the predetermined speed can be performed by the second flow control valve 109 connected to the pneumatic cylinder device 69, but the incompressibility is not the same as that of the hydraulic cylinder device 71 that uses oil as the working fluid. Mainly performed by the three flow rate control valve 115.

According to the present embodiment, mainly by appropriately operating the third flow rate control valve 115 connected to the hydraulic cylinder device 71 that uses oil as a working fluid, which is incompressible, a plurality of plates that support the cut-off side of the plate material is also operated. The support arm 47 can be rotated downward at a predetermined speed. Therefore, since the support arm 47 has a low rotation speed, the plate material interferes with the ram 17 and the back gauge device 37, and the plate material is dented. It doesn't happen that there is such a thing. Also, the support arm 107
Since the rotation speed of the plate is fast, the plate is not sheared and bent without being sufficiently supported by the support arm 47.

Further, since the hydraulic cylinder device 71 is appropriately operated via the pneumatic-hydraulic pressure converter 117 connected to the compressed air source 131, the cost is relatively low.

The present invention is not limited to the description of the above embodiment, but can be implemented in various other modes by making appropriate changes.

[Effects of the Invention] As can be understood from the above description of the embodiments, the present invention is, in short, the lower blade (13) attached to the work table (11) of the shearing machine and the ram (17) movable up and down.
In a plate material supporting device that supports the cut-off side of the plate material to be sheared by cooperation with the upper blade (15) attached to the plate, the rotary shaft (53) provided horizontally and extending in the left-right direction is sheared. A plurality of support arms (47), which are rotatably supported by the frame of the machine and support the cut-off side of the plate material, are provided at appropriate intervals in the longitudinal direction of the rotary shaft (53), and each support is provided. An air cylinder device for connecting an arm (47) to the rotating shaft (53), and rotating the rotating shaft (53) to vertically swing the support arms (47) ( 69) and a hydraulic cylinder device (71) are provided, and the piston rods (83) of both the cylinder devices (69, 71) are provided so as to be connected to the rotating shaft (53). The upper and lower air chambers and the compressed air source (131) are connected via the directional control valve (99). Sectional freely provided, the hydraulic cylinder device (71) below the hydraulic chamber (113) and a hydraulic pneumatic transducer (117) and flow control valve circuit connecting a (11
5) is arranged and provided, and when the compressed air source (131) and the air chamber below the pneumatic cylinder (69) are connected, the compressed air source (131) and the hydraulic / pneumatic converter ( 117) is connected, and the air chamber above the pneumatic cylinder (69) is connected to the compressed air source (131) to connect the support arm (4
When swinging 7) downward, the hydraulic cylinder device (7
Since the oil is returned from the hydraulic chamber (113) to the hydraulic / pneumatic pressure converter (117) through the flow control valve (115) in 1), when the support arm 47 swings downward, Pressure acts on the upper air chamber of the pressure cylinder device 69, and
53 tends to rotate to swing the support arm 47 downward. However, the tendency of the pivot shaft 53 to pivot to swing the support arm 47 downward causes the hydraulic cylinder device 71 to act as a resistance, which prevents rapid pivoting downward. The downward swing speed of the support arm 47 is controlled by controlling the flow rate of the oil returned from the hydraulic chamber 113 of the hydraulic cylinder device 71 to the hydraulic / pneumatic pressure converter 117 by the flow rate control valve 115.

Therefore, it is easy to control the swing speed of the support arm 47 in the downward direction to an appropriate speed, and it is possible to easily eliminate the above-mentioned conventional problems.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings illustrate an embodiment of the present invention, and FIG. 1 is a bottom rear view of a shearing machine. FIG. 2 is a view taken along the line II-II in FIG. Figure 3 is the first
It is the figure which followed the III-III line in the figure. Figure 4 shows the first
FIG. 4 is an enlarged view of an arrow IV in the figure. FIG. 5 is a circuit diagram of the hydraulic cylinder device and the pneumatic cylinder device. 1 …… Shirring machine 47 …… Support arm 69 …… Pneumatic cylinder device 71 …… Hydraulic cylinder device 115 …… Third flow control valve 117 …… Pneumatic hydraulic converter

Claims (1)

[Scope of utility model registration request] 1. A work table (1 for a shearing machine
In the plate material support device that supports the cut-off side of the plate material that is sheared by the cooperation of the lower blade (13) attached to 1) and the upper blade (15) attached to the vertically movable ram (17), Further, a rotary shaft (53) extending in the left-right direction is rotatably supported by the frame of the shearing machine, and a plurality of support arms (47) for supporting the cut-off side of the plate are rotated. The support arms (47) are provided at appropriate intervals in the longitudinal direction of the shaft (53) and the support arms (47) are connected to the rotary shaft (53), and the rotary shaft (53) is rotated to provide the above-mentioned each. A pneumatic cylinder device (69) and a hydraulic cylinder device (71) for swinging the support arm (47) up and down are provided, and the piston rods (83) of the both cylinder devices (69, 71) are attached to the rotary shaft. (53) is connected to the upper and lower air chambers of the pneumatic cylinder device (69) and compressed. The air source (131) is provided via the directional control valve (99) so as to be freely connectable and disconnectable, and the hydraulic chamber (113) below the hydraulic cylinder device (71) and the hydraulic / pneumatic pressure converter (117) are connected. Flow control valve on the circuit (115)
Are arranged to connect the compressed air source (131) and the air chamber below the pneumatic cylinder (69) to the compressed air source (131) and the hydraulic / pneumatic converter (117). Is connected, and the air chamber above the pneumatic cylinder (69) and the compressed air source (131) are connected to each other so that the support arm (47) is connected.
When swinging down, the hydraulic cylinder device (7
A plate material supporting device in a shearing machine, characterized in that oil is returned from the hydraulic chamber (113) of 1) to the hydraulic / pneumatic pressure converter (117) via the flow control valve (115).