JP3780445B2 - Flat plate punching machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
In the present invention, a head panel for attaching a cutting die to the lower surface is disposed relative to the upper portion of the lower plate for mounting the face plate on the upper surface, and cardboard, veneer and other punched articles supplied between the lower plate and the cutting die. The present invention relates to a flat plate punching machine for punching a material (which can also be ruled). The flat plate punching machine of the present invention is an automatic flat plate punching machine that supplies a punched material to a predetermined part by an automatic feeder, a flat plate punching machine that manually supplies a punched material, and a semi-automatic flat plate punching machine. Applicable to flat type punching machine.
[0002]
[Prior art]
A conventional flat plate punching machine is generally configured as shown in FIG. 12 (the automatic flat plate punching machine is disclosed in the drawing). This conventional apparatus will be described with reference to FIG. In the figure, 1 is a base, 2 is a head provided on the upper part of the base 1, and a die 3 is attached to the lower surface of the head 2. Reference numeral 4 is a lower board which is attached between the base 1 and the head 2 and is disposed so as to be movable up and down relative to the head 2. The lower board 4 is moved up and down by a crank mechanism 6 or the like. It is configured. Reference numeral 7 denotes an automatic feeding device that includes a pair of endless chains 8 and 8 and is configured to intermittently transfer a material to be punched (not shown) in order to supply between the head 2 and the lower board 4. The automatic feeding device 7 is configured to intermittently drive in association with the up-and-down movement of the lower board 4. Then, when the feeding device 7 is stopped, the lower board 4 is pushed up to punch the workpiece.
[0003]
In general, an automatic feeder for a flat plate punching machine has a bar installed between the chains 8 and 8 with a predetermined interval, and a clip is attached to each bar, and the front end of the material to be punched is clamped by this clip. Thus, the chain 8 is intermittently rotated by a predetermined distance, and the material to be punched is transferred to the punching side. However, as described above, the conventional apparatus pushes up the lower board 4 and performs punching processing. Therefore, it has the following problems. That is, since the punched material is pushed up by the lower plate and punched, it is necessary to provide “sag” on the chain 8. As a result, a dimensional error may occur between the die 3 and the material to be punched.
[0004]
In addition, it is essential that the flat plate punching machine is punched so that the punched material does not fall out of the punched material for handling after-treatment. Since it swings up and down, there has been a problem that the punched material falls out of the punched material due to an impact at the time of lowering. For this reason, conventionally, punching is performed in a state where a part of the punched material is not punched and a part thereof is left as a “joint”. According to this punching process, that is, the method of leaving the “joint”, the problem that the punched material falls out of the punched material can be solved. On the other hand, if punching is performed while leaving the “joint”, it takes time to remove the punched material from the punched material when necessary, and the “joint” part remains burr-like. Problems remain in punched products.
[0005]
In order to solve the above-mentioned problems of the conventional apparatus, an attempt has been made to develop a flat board punching machine configured to fix the lower board side and move the head side up and down. One of the methods is one in which the head is moved up and down by a hydraulic device, and the other method is one in which the head is moved up and down by a crank mechanism. According to these methods, the above-described problems can be solved.
[0006]
However, the former method, that is, the one using the hydraulic device has a problem that the speed is slow and the fine adjustment of the pressure is difficult, and the latter method, that is, the one using the crank mechanism, has a pressing force ( The punching force is weak.
[0007]
Accordingly, the present inventor has developed a flat plate punching machine that can improve the punching workability by maintaining a high speed and increasing the pressing force (see Utility Model Publication No. 2581396). This flat plate punching machine (hereinafter referred to as “prior invention”) is configured such that a movable unit having a head panel is disposed so as to be movable up and down relative to a fixed unit having a lower panel, and the movable unit is moved up and down by a lifting drive mechanism. In the flat plate punching machine, the elevating drive mechanism pivotally connects two link rods so that they can be bent, and the end of one link rod is locked to a predetermined portion on the fixed unit side and the other link A toggle mechanism that is configured to lock the end of the hook to a predetermined part on the movable unit side, transmit the bending and stretching movements of both link hooks to the movable unit, and move the movable unit up and down symmetrically. And an eccentric mechanism that bends and stretches both link rods by pushing and pulling the pivotal attachment portion of the link rod. The eccentric mechanism has an eccentric ring that is fixed to the rotating shaft, and the proximal end side of the eccentric wheel is freely rotatable. Actuating lever provided by fitting to And a connecting rod provided with one end pivotably connected to the distal end side of the actuating lever, and the other end of the connecting rod is pivotally attached to the pivotally attached portions of the two link rods. A sliding member is mounted on the shaft that is symmetrically arranged and connects the operating lever and the connecting rod, and the sliding member is engaged with a horizontal guide groove formed in a predetermined portion of the fixed unit. In addition, the shaft is supported so as to be reciprocally movable in the horizontal direction.
[0008]
According to this prior invention, it is possible to increase the pressing force while maintaining a high speed. Further, when a toggle mechanism and an eccentric mechanism are employed as the raising / lowering drive mechanism, there is a problem unless the link rods of the toggle mechanism are configured so as to be exactly coincident and bend and stretch symmetrically. In other words, if there is a difference in the bending speed of the left and right link rods, the movable unit will move up and down while “fluffing”. Contacting the punched material will hinder the punching operation.
[0009]
Therefore, in the prior invention, as described above, the sliding member 102 is mounted on the shaft 101 connecting the operating lever and the connecting rod, and the horizontal guide groove 103 is formed in the predetermined portion of the fixed unit. And the shaft 101 is supported so as to be reciprocally movable in the horizontal direction (see FIG. 11). With this configuration, the shaft 101 always reciprocates while maintaining the level. In other words, the link rods of the toggle mechanism provided symmetrically are bent and stretched in exact alignment at the same speed symmetrically.
[0010]
However, as shown in FIG. 11, the sliding member 102 of the prior invention is composed of a square-shaped square member 104, and the horizontal guide groove 103 is fixed to a predetermined portion 106 of a fixed unit. A pair of horizontal guide rods 108, 108 are fixed to the members 107, 107 at a predetermined interval in the vertical direction, and are opposed to each other, and the opposing surfaces 109, 109 of both guide rods 108 are flatly ground 110 and slid. Since the moving surfaces 109A and 109A are formed, they have the following problems.
[0011]
That is, (1) Grinding 110 of the both guide rods 108 is performed after the guide rods 108 are fixed to the support member 107 by welding or the like in order to accurately obtain horizontal accuracy. The grinding 110 is applied from the outside by an end mill or the like. The facing surface 109 is machined flat, but if it goes inside, it will be difficult for the blade to escape and it will be difficult to achieve horizontal accuracy, so it will take a lot of time and labor to work, and the manufacturing cost will be high. Become. (2) In order to make the sliding member 102 slide smoothly, it is necessary to always supply lubricating oil to the sliding surface 109A. Therefore, an oil hole 111 communicating with the sliding surface 109A is provided in the upper guide rod 108. However, since the gap between the guide rods 108 and 108 is narrow and the sliding surface 109A is a flat surface, this is the case. Under such circumstances, it is extremely difficult to drill the hole 111 that communicates the outside with the sliding surface 109A. (3) Since the sliding surface 109A is a flat surface, it is necessary to provide a guide for preventing the sliding member 102 from rolling.
[0012]
[Problems to be solved by the invention]
Although the present invention has been made in view of the above-described circumstances, it is possible to maintain the high speed and strengthen the pressing force, improve the punching workability as in the previous invention, and improve the punching workability. It is an object of the present invention to provide a flat plate punching machine that can solve all of the problems (3) to (3).
[0013]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention has a fixed unit having a lower plate to which a face plate is attached on an upper surface and a head plate to which a die is attached on the lower surface. A movable unit disposed opposite to the lower plate so as to be movable up and down, an elevating drive mechanism that drives the movable unit up and down, a weight balance that supports the weight of the movable unit, and a lowering movement of the movable unit are regulated. A flat plate punching machine comprising a safety stopper device and driving the movable unit up and down to punch a punched material,
The elevating drive mechanism pivotally connects two link rods so that they can be bent, and the end of one link rod is locked to a predetermined portion on the fixed unit side, and the end of the other link rod is movable unit. A toggle mechanism that is locked to a predetermined portion on the side and arranged symmetrically on the left and right sides, and an eccentric mechanism that pushes and pulls the pivotally attached portions of both link rods to bend and stretch both link rods. Has an eccentric wheel mounted on a fixed shaft on the rotating shaft and an operating lever that is provided with a base end side rotatably fitted to the eccentric wheel. One end of the lever is pivotable about the shaft. The other end of the connected connecting rod is pivotally engaged with the pivoting portions of the two link rods so as to be arranged symmetrically, and a sliding member is attached to the shaft connecting the operating lever and the connecting rod. The sliding member is engaged with a horizontal guide groove formed in a predetermined portion on the fixed unit side, and the shaft The sliding surface of the guide groove is formed by circular concave surfaces facing each other in the vertical direction, and the outer wall surface of the sliding member that engages with the guide groove is formed by the guide groove. It is formed in an arc convex surface that matches the arc concave surface.
The weight balance is composed of an air cylinder, a cylinder tube fixed and fixed to a predetermined portion, a piston housed in the tube so as to be slidable back and forth, a lower end side fixed to the piston, and an upper end side thereof A piston rod protruding outside the tube, and an air introduction hole formed on the lower end side of the tube, and a predetermined portion of the movable unit is supported by the upper end portion of the rod, and a predetermined amount of pressure air is supplied from the introduction hole. Is introduced into the tube to act on the piston, and the movable unit is elastically supported by air pressure.
[0014]
In the invention according to claim 1 of the present invention, the safety stopper device is provided at the lower side of the movable unit and can be raised and lowered and urged in a direction to stand up by a spring. A safety support leg that supports the lowering of the piston rod, and the tip end of the piston rod is pivotally attached to the upper end of the support leg, and the rear end of the cylinder tube is pivotally attached to a predetermined part. A single-acting piston type air cylinder, and when the pressure air is introduced into the weight balance air cylinder, the pressure leg is introduced into the cylinder tube when the pressure air is introduced, and the piston is moved backward to support the support leg with the rod. When the air pressure introduced into the weight balance air cylinder falls below a predetermined value, the cylinder tube of the stopper device is moved to the cylinder tube. To stop the supply of compressed air, and is configured the support legs so as to stand up under the action of the spring.
[0015]
The flat plate punching machine of the present invention configured as described above has the following operational effects. (1) Since the toggle mechanism and the eccentric mechanism are employed as the raising / lowering drive mechanism, it is possible to maintain a high speed and increase the pressing force (punching force) of the head panel. (2) Since the sliding surface of the horizontal guide structure is composed of circular concave surfaces facing each other up and down, the guide groove can be ground easily and with high accuracy by boring or the like. (3) Drilling of the oil hole communicating with the sliding surface is facilitated. (4) Since the sliding member is engaged by the arc convex surface and the arc concave surface, the sliding member does not roll. (5) The movable unit can be smoothly moved up and down (particularly the return operation) smoothly.
[0016]
Here, the flat plate punching machine of the present invention is an automatic flat plate punching machine that supplies a punched material to a predetermined part by an automatic feeder, a flat plate punching machine that supplies a punched material manually, and a semi-automatic flat plate punching machine. All types of flat plate punching machines are included.
[0017]
According to a second aspect of the present invention, in the first aspect of the present invention, the horizontal guide groove is formed on an opposing surface of a pair of horizontal guide rods fixed to and fixed to the fixed unit at a predetermined interval in the vertical direction. The arcuate concave surface is formed.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. 1 is a side view showing an embodiment of a flat plate punching machine according to the present invention, FIG. 2 is a front view of the same, FIG. 3 is a plan view showing a part of a lifting drive mechanism of the punching machine, and FIG. 5 is an exploded perspective view showing a part of the mechanism, FIG. 5 is an enlarged vertical sectional view showing an engagement state of the sliding member of the driving mechanism with respect to the horizontal guide groove, and FIG. 6 is a vertical sectional view showing the horizontal guide groove. 7 is a perspective view a and a side view b showing the sliding member, FIG. 8 is a longitudinal sectional view showing an enlarged portion of the weight balance employed in the punching machine, and FIG. 9 is a safety stopper employed in the punching machine. The side view which expands and shows the part of an apparatus, FIG. 10 is block explanatory drawing for demonstrating operation | movement of the safety stopper apparatus employ | adopted for the weight balance same as the above and the punching machine same as the above.
[0019]
In this embodiment, the present invention is applied to an automatic flat plate punching machine. 1 to 10, the flat plate punching machine of this embodiment includes a fixed unit A, a movable unit B that moves up and down with respect to the fixed unit A, and a lift drive mechanism that drives the movable unit B up and down. C, an automatic feeding device D for supplying the punching machine to a predetermined part, a weight balance E for supporting the weight of the movable unit B, and a safety stopper device F for restricting the lowering of the movable unit B when necessary. .
[0020]
The fixed unit A has a lower plate 11 fixedly supported on a base 12 standing on a base plate 13 at a predetermined height, and a face plate 14 is attached to the upper surface of the lower plate 11.
[0021]
The movable unit B has a head panel 21 fixed to the upper ends of the pair of machine frames 22, 22. The lower surface of the head panel 21 is opposed to the upper surface of the lower panel 11, and the movable unit B can be raised and lowered relative to the fixed unit A. The die 23 is attached to the lower surface of the head board 21 so as to correspond to the face board 14. In this case, the movable unit B may be configured to provide a guide at an appropriate part of the machine casing 22 to guide the movable unit B in the vertical direction.
[0022]
Elevation driving mechanism C and the toggle mechanism C ₁ which drives the raising or lowering of the two link rods of bending and stretching exercises the movable unit the unit B is transmitted to B, and two link rods to push and pull the toggle mechanism C ₁ and a eccentric mechanism C ₂ to bending and stretching.
[0023]
The toggle mechanism C ₁ pivotally attaches two link rods 31 and 32 with a pivot 33 and flexibly connects them. The end of one link rod 31 is connected to the lower surface of the side portion of the lower plate 11 of the fixed unit A. The other link rod 32 is pivotally attached to the shaft 35 provided on the lower end side of the machine frame 22 of the movable unit B so as to be pivotally attached to and locked with the provided shaft 34. Locked and symmetrically disposed on the left and right side portions of the base 12.
[0024]
The eccentric mechanism C ₂ includes a rotary shaft 36 that is provided laterally in the substantially central portion of the base 12, an eccentric ring 37 that is eccentrically mounted on the rotary shaft 36 and mounted on a fixed shaft, and a base end side of the eccentric ring 37 that is freely rotatable. And the other end of a connecting rod 40 provided with one end pivotably connected to the tip end side of the lever 38 by the shaft 39. The pivot shaft 33 is pivotally attached to the pivot shaft 33 and arranged symmetrically.
[0025]
Slide members 41 are mounted on both ends of a shaft 39 connecting the lever 38 and the connecting rod 40, and the horizontal guide grooves 42 formed so as to be opposed to the front and rear portions of the base 12 of the fixed unit. And both ends of the shaft 39 are supported so as to be reciprocally movable in the horizontal direction. The sliding surfaces 43, 43 of the guide groove 42 are formed as arc concave surfaces facing each other up and down, and the engaging outer wall surfaces 44, 44 of the sliding member 41 with the guide groove 42 are the sliding surface 43. It is formed in the circular arc convex surface which fits and engages with this circular arc concave surface. In this embodiment, the guide groove 42 is fixed relative to a support member 45, 45 fixedly mounted on the base 12 of the fixed unit by fixing a pair of horizontal guide rods 46, 46 at a predetermined interval. The arcuate concave surfaces are formed on the opposing surfaces of the guide rods 46 to constitute the sliding surfaces 43, 43.
[0026]
Of the guide rods 46, 46, the upper guide rod 46 is formed with an oil hole 47 that communicates the outside with the sliding surface 43, and the lubricating oil in the oil tank 48 is formed in the sliding surface 43 through the hole 47. 49 is supplied by a pump 52 through a filter 50 and a transport pipe 51 (see FIG. 5). The oil hole 47 can be formed by drilling a horizontal hole in a predetermined portion of the guide rod 46.
[0027]
As shown in FIG. 7, oil guiding grooves 53, 53 are formed on the engaging outer wall surfaces 44, 44 of the sliding member 41, and both the grooves 53 are communicated with each other through the connecting hole 54. The oil supplied to the surface 43 is also introduced into the lower sliding surface 43 through the connecting hole 54. In the figure, reference numeral 55 denotes a bearing of the rotary shaft 36, and 56 denotes a pulley.
[0028]
The automatic feeder D is arranged with sprockets 61 and 62 mounted on the rotary shafts 63 and 64 on the front and rear sides of the head panel 21 of the movable unit B, and between the sprockets 61 and 62, a chain, a timing belt, etc. The endless strips 65, 65 are placed over the two strips 65, and a bar (not shown) is mounted between the strips 65, 65 with a predetermined gap between them. It is comprised so that it may rotate endlessly in the front-back direction between 21 upper and lower sides. The feeding device D is intermittently driven at a timing set in association with the up-and-down movement of the head panel 21, and sandwiches the front end of cardboard, veneer or other punched material (not shown) with a clip of each bar. In this way, it is configured so that it is intermittently transferred to the punching die 23 side, and when the strip 65 is stopped, the head panel 21 is pushed down to perform punching processing (same for ruled line processing). Is the same as
[0029]
The weight balance E supports the weight of the movable unit 13, and the weight balance E of this embodiment is constituted by an air cylinder 71. The air cylinder 71 is positioned at each corner (four locations) of the machine frame 22 of the movable unit B, and is fixed on the base plate 13 so as to stand up and reciprocate while maintaining airtightness in the tube 72. A piston 73 slidably housed, a piston rod 74 whose lower end is fixed to the piston 73 and whose upper end protrudes outside the tube 72, and an air introduction hole 75 formed on the lower end side of the tube 72; The upper end of the rod 74 is fixed to a support member 76 projecting from a predetermined portion of the machine frame 22, and predetermined pressure air is introduced into the tube 72 from the introduction hole 75 to act on the piston 73. The weight of the movable unit B is balanced and elastically supported by (air spring). An air inlet / outlet port 77 provided on the upper end side of the tube 72 is open.
[0030]
The pressure value of the pressure air introduced into the tube 72 is set so as to correspond to the weight of the movable unit B. If a commercially available air cylinder is used as it is as the air cylinder 71, the air pressure in the tube 72 becomes too high during compression, that is, when the movable unit B is lowered, and the press (punching) force may be weakened. . Therefore, for example, it is preferable to combine a cylinder tube having a length of about 100 mm or more (for example, about 100 to 400 mm) with a piston having a stroke of 50 mm.
[0031]
The introduction and control of the pressure air to the air cylinder 71 can be performed as follows, for example. FIG. 10 shows an example, 81 is a compressor, 82 is a pressure reducing valve, 83 is a check valve, 84 is a pressure sensor, 85 is a branch pipe, and the branch pipe 85 is an air introduction hole 75 of the tube 72 of each cylinder 71. It is connected to the. Therefore, when the compressor 81 is operated, the compressed air is depressurized to a set pressure value by the pressure reducing valve 82 and is introduced into each cylinder tube 72 through the check valve 83 and the branch pipe 85, and this air pressure acts on the piston 73. The piston 73 is pushed up. This pressure value is detected by a sensor, and a pressure equal to or higher than the set value is released to the outside and controlled constantly.
[0032]
The safety stopper device F regulates the lowering of the movable unit B when necessary, and the stopper device F of this embodiment is located at the lower side of each corner (four locations) of the machine frame 22 of the movable unit B. A safety support leg 94 provided on a bearing plate 91 fixed on the plate 13 so as to be raised and lowered by a shaft 92 and biased in a direction to stand up by a spring 93, and a rear end portion of a cylinder tube 96 as a base. A single-acting piston-type air cylinder 95 pivotably mounted 97 on the plate 13, and the tip of the piston rod 98 of the cylinder 95 is rotatably attached to the upper end side of the support leg 94. 99, and when the air cylinder is operated, pressurized air is introduced into the tube 96 from the air inlet / outlet port 100 provided on the distal end side of the cylinder tube 96 to act on the piston 98A. When the pressure of the air introduced into the cylinder tube 72 of the weight balance falls below a predetermined value, the rod 98 is retracted and the support leg 94 is pulled by the rod 98 against the spring 93 to fall. The supply of pressurized air to the tube 96 is stopped, the support leg 94 is erected by the action of the spring 93, and the machine frame 22 of the movable unit B is supported to restrain the lowering. Reference numeral 93 </ b> A is an engagement rod provided on the bearing plate 91 for abutting against the support leg 94 when the support leg 94 is erected by the action of the spring 93 to stand vertically.
[0033]
The control of the air cylinder 95 of the stopper device F can be performed as follows, for example. FIG. 10 shows an example, 86 is a control valve connected to the compressor 81, 87 is a branch pipe, and the branch pipe 87 is connected to the air inlet / outlet 100 of the tube 96 of each cylinder 95. Therefore, when the compressor 81 is operated, the compressed air is introduced into each tube 96 through the control valve 86 and the branch pipe 87, and this air pressure is applied to the piston 98A to retract the piston 98A. Therefore, the safety support leg 94 is pulled against the spring 93 by the rod 98 and falls down. When the detected pressure of the pressure sensor 84 becomes a predetermined value (for example, 4.5 kg / cm ² ) or less, the supply of pressurized air to the tube 96 is stopped and the support leg 94 is raised by the action of the spring 93. Configure as follows. Thereby, for example, when the operation of the compressor 81 is stopped, the support leg 94 is erected.
[0034]
The flat plate punching machine of this embodiment is configured as described above. Next, the operation and the like will be described. 1 and 2, the movable unit is located at the top dead center. In this state, the punched material supplied to one sheet from a paper supply unit (not shown) is sandwiched between the clips of the bar, and the strip 65 is rotated to one frame so that the punched material is placed under the punch 23. It moves to a predetermined position and the strip 65 stops. During this stop, the rotary shaft 36 of the lifting / lowering drive mechanism C makes one rotation and pushes and pulls the pivoting portions of both link rods 31 and 32 to move the movable unit up and down. During this time, the connecting rod 40 retracts and pulls the pivoting portion, so that both link rods 31 and 32 are gradually extended, and this extension movement is transmitted to the movable unit B. Gradually descends, and at approximately half-rotation position, both link rods extend to the maximum and approach a straight line, generating a large force at the movable end of the link rod. At this time, the head panel reaches the bottom dead center and is punched. The material is punched with a die 23. During the remaining half rotation of the shaft 36, the connecting rod 40 moves forward and pushes the pivoting portion back, and both the link rods are bent by the action of the air cylinder 71 of the weight balance D. Ascend to the position.
[0035]
On the other hand, when the connecting rod 40 moves backward and forward, the shaft 39 connecting the operating lever 38 and the connecting rod 40 always reciprocates while maintaining the horizontal state by the engagement of the sliding member 41 and the horizontal guide groove 42. become. Therefore, the link rods 31 and 32 of the toggle mechanism C ₁ provided symmetrically exactly match and bend and extend symmetrically. That is, the left and right link rods bend and stretch at the same speed. Further, since the sliding member 41 and the guide groove 42 are engaged by the arc convex surface and the arc concave surface, the sliding member 41 moves straight without swinging during the reciprocating sliding.
[0036]
Although this embodiment discloses the case where the present invention is applied to an automatic flat plate punching machine, the present invention omits the automatic feeding device and manually supplies the punched material to a predetermined portion. Of course, it can be applied to a punching machine and a semi-automatic punching machine.
[0037]
【The invention's effect】
The present invention has the following effects. (1) Since the raising / lowering drive mechanism of the movable unit is composed of the toggle mechanism and the eccentric mechanism, it is possible to maintain a high speed and increase the pressing force of the headboard, and thus improve the punching workability. it can. (2) The horizontal guide groove can be easily ground. (3) Drilling of the oil hole communicating with the sliding surface is facilitated. (4) Since the sliding member is engaged with the horizontal guide groove by the arc convex surface and the arc concave surface, it is possible to prevent the sliding member from rolling laterally during the reciprocating movement.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a flat plate punching machine according to the present invention.
FIG. 2 is a front view of the same.
FIG. 3 is a plan view showing a part of a lifting drive mechanism of the punching machine.
FIG. 4 is an exploded perspective view showing a part of the drive mechanism.
FIG. 5 is an enlarged longitudinal sectional view showing an engagement state of a sliding member of the drive mechanism with the horizontal guide groove.
FIG. 6 is a longitudinal sectional view showing the horizontal guide groove.
FIG. 7 is a perspective view and a side view b showing the sliding member.
FIG. 8 is an enlarged longitudinal sectional view showing a weight balance portion employed in the punched material.
FIG. 9 is an enlarged side view showing a part of the safety stopper device employed in the punching machine.
FIG. 10 is a block explanatory diagram for explaining the operation of the weight balance and the safety stopper device.
FIGS. 11A and 11B are explanatory views shown to point out problems of the prior invention, wherein FIG. 11A shows a state in which the sliding member is engaged with the horizontal guide groove, and FIG. 11B shows grinding of the sliding surface; The figure shown in order to demonstrate.
FIG. 12 is a side view showing a conventional automatic flat plate punching machine.
[Explanation of symbols]
A Fixed unit B Movable unit C Lifting drive mechanism C ₁ Toggle mechanism C ₂ Eccentric mechanism 11 Lower panel 21 Head panel 31, 32 Link rod 38 Actuating lever 39 Shaft 40 Connecting rod 41 Sliding member 42 Horizontal guide groove

Claims (2)

A movable unit having a fixed unit having a lower plate for attaching a face plate to the upper surface, a head plate for attaching a mold to the lower surface, and arranged to be movable up and down with the head plate facing the lower plate, and the movable unit An elevating drive mechanism for elevating and lowering , a weight balance for supporting the weight of the movable unit, and a safety stopper device for restricting the downward movement of the movable unit. A flat plate punching machine for punching,
The elevating drive mechanism pivotally connects two link rods so that they can be bent, and the end of one link rod is locked to a predetermined portion on the fixed unit side, and the end of the other link rod is movable unit. A toggle mechanism that is locked to a predetermined portion on the side and arranged symmetrically on the left and right sides, and an eccentric mechanism that pushes and pulls the pivotally attached portions of both link rods to bend and stretch both link rods. Has an eccentric wheel mounted on a fixed shaft on the rotating shaft and an operating lever that is provided with a base end side rotatably fitted to the eccentric wheel. One end of the lever is pivotable about the shaft. The other end of the connected connecting rod is pivotally engaged with the pivoting portions of the two link rods so as to be arranged symmetrically, and a sliding member is attached to the shaft connecting the operating lever and the connecting rod. The sliding member is engaged with a horizontal guide groove formed in a predetermined portion on the fixed unit side, and the shaft The sliding surface of the guide groove is formed by circular concave surfaces facing each other in the vertical direction, and the outer wall surface of the sliding member that engages with the guide groove is formed by the guide groove. Formed on an arc convex surface that matches the arc concave surface,
The weight balance is composed of an air cylinder, a cylinder tube that is fixed and fixed to a predetermined portion, a piston that is slidably reciprocated in the tube, a lower end side is fixed to the piston, and an upper end side is fixed to the piston. A piston rod protruding outside the tube, and an air introduction hole formed on the lower end side of the tube, and a predetermined portion of the movable unit is supported by the upper end portion of the rod, and a predetermined amount of pressure air is supplied from the introduction hole. Is introduced into the tube to act on the piston, and the movable unit is elastically supported by air pressure,
The safety stopper device is located on the lower side of the movable unit and can be raised and lowered, and is urged in a direction to stand up by a spring. A single-acting piston-type air cylinder that pivotably engages the tip of the piston rod to the upper end of the support leg and pivots the rear end of the cylinder tube to a predetermined portion. And when the pressure air is introduced into the weight balance air cylinder, the pressure balance air is introduced into the cylinder tube, the piston is retracted, and the support leg is pulled by the rod to fall down. When the pressure of the air introduced into the cylinder reaches a predetermined value or less, the supply of pressurized air to the cylinder tube of the stopper device is stopped, and the support leg Characterized by being configured to erect under the action of said spring,
Flat plate punching machine. 2. The flat surface according to claim 1, wherein the guide groove is formed by forming the concave arc surface on opposing surfaces of a pair of horizontal guide rods fixed to the fixed unit with a predetermined interval in the vertical direction. Board punching machine.

Images