KR20190030430A - Press machine with improved safety features - Google Patents

Abstract

The present invention relates to a press device, which provides safety, easily controls a stroke, and reduces electric consumption, comprising: an ascending driving unit installed at a frame and connected to an upper press so as to move the upper press to the upward to maintain an initial state when power is applied; an elevating driving unit installed at the frame and connected to the upper press so as to elevate the upper press within an elevation stroke distance; and a press driving unit installed at the frame and processing a material by pressing a pusher to the downward when the descent of the upper press is completed by the elevating driving unit and so a lower end of the pusher is supported by an upper end of a hitting unit of the upper press.

Description

[0001] Press machine with improved safety features [

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a press apparatus, and more particularly, to a press apparatus which is easy to control safety and stroke and has improved power saving.

Generally, a press apparatus is a compression processing machine for producing a product by plastic deformation in a desired form by applying a force to a material in a state of being heated or not heated. The compressive force of the press mainly uses electric motors, and there are hydraulic, hydraulic and pneumatic presses using water, oil and air pressure. Pressing can process the unheated material and obtain accurate dimensions and shape. It can be mass produced with a short processing time, and it can produce various products ranging from small and precise parts to large machine parts.

Such a conventional press apparatus includes an upper press and a lower press, places a material to be processed on the lower press, and presses the upper press to produce an article.

The pressing force of the upper press must be very large in order to process a material having a high toughness and strength such as an iron plate. Therefore, in order to raise and lower the upper press, a very large output power source must be provided, thereby increasing the power consumption accordingly.

In addition, safety accidents involving fingers or the like between the upper press and the lower press frequently occur, and in such a case, a large accident occurs due to the pressing force of the upper press operated with a very large force.

Korean Patent Publication No. 10-2005-0078090 (Aug. 4, 2005)

It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing a press machine, in which most of the lift scrolls of the upper press are made by a low- And to provide a press apparatus which is easy to control safety and stroke and has improved power saving.

It is another object of the present invention to provide a press device which is easy to adjust safety and stroke while allowing the pusher to be moved up and down by a minimum distance to press the material while the press motor is rotated at a relatively large angle of 360 degrees have.

It is still another object of the present invention to provide a press device which is easy to control safety and stroke, and is capable of sequentially releasing the pusher and the striking portion and raising the upper press only by reversely driving the elevating motor .

It is another object of the present invention to provide a press device which is easy to control safety and stroke and is capable of reducing power consumption so that free press of the upper press can be prevented when power supply to the press device is cut off.

It is a further object of the present invention to provide a press capable of adjusting the stroke of the pusher by a relatively simple operation of rotating the stroke adjusting screw of the vertical stroke adjusting unit clockwise or counterclockwise, Device.

In order to achieve the above object, the present invention provides a safety press apparatus comprising: a frame; a lower die on which a material to be mounted and installed on the frame is seated; and an upper press installed to move up and down on the frame, A lift driving unit installed in the frame and connected to the upper press to move the upper press upward to maintain the initial state when power is applied; A lifting and driving unit installed in the frame and connected to the upper press to elevate the upper press within the lifting stroke; A press driving unit installed in the frame and configured to press the pusher downward when the upper press is lowered by the lifting and lowering driving unit and the lower end of the pusher is supported on the upper end of the hitting part of the upper press, A pusher releasing portion that is installed in the frame and releases the pusher from the hitting portion so that the upper press is raised when the material is processed by the press driving portion; Further comprising a self-weight drop prevention unit which is installed in the frame and is connected to the upper press when the external power is cut off or when the power of the rising motor is cut off, thereby preventing the upper press from dropping due to its own weight, A ratchet that is fixed to the frame and is lifted and lowered together with the upper press; a ratchet mounted on the frame so as to be engaged with and separated from the ratchet gear; and a ratchet connected to the ratchet, And an electromagnet switch for allowing the ratchet to mesh with the ratchet gear when the power to the lift motor is cut off.

As described above, according to the present invention, there is provided an elevator according to the present invention, comprising: a lift driving unit installed in a frame and connected to an upper press to move the upper press upward to maintain an initial state; And a press drive unit installed on the frame for lowering the upper press by the lifting and lowering driving unit to press the pusher downward when the lower end of the pusher is supported on the upper end of the hitting unit of the upper press, Respectively. Therefore, the vertical stroke transfer with a relatively large stroke distance from the initial position where the upper press is elevated to the lowering position immediately before the material processing is made by the low-power lift moving part to prevent a safety accident, Only the upper and lower stroke transport distances are made by the high-output press drive section. Therefore, most of the ascending / descending stroke of the upper press is made by the elevating drive section of low output, and the very small stroke for material processing is performed by the high-output press drive section, so that the power consumption is minimized.

Further, in the present invention, the pusher is raised and lowered by the eccentric distance of the elevating operation cam during one rotation of the press motor of the press driving section. As the rotation angle of the press motor increases, the pushing force of the pusher increases as the lift distance of the pusher decreases. As the lift angle of the pusher increases, the pushing force of the pusher decreases. While the press motor is rotating at a relatively large angle of 360 degrees, the pusher is lifted a minimum distance to press the workpiece. Therefore, the pressing force of the material is maximized.

The pusher releasing portion of the present invention releases the end portion of the pusher from the upper end of the striking portion so that the upper press is raised when the elevating motor of the elevation driving portion is rotated in reverse after the material is processed by the press driving portion. Therefore, when the elevating motor of the elevation driving portion is reversely rotated, the pusher releasing portion is operated by the rotational power of the elevation motor to separate the pusher and the striking portion, and thereafter, the upper press is raised. Therefore, since the disengagement operation of the pusher and the striking portion and the upward operation of the upper press are sequentially performed only by the reverse rotation of the elevating motor, two operations are successively performed by one power source, thereby reducing the number of parts and improving the efficiency of operation .

The present invention is equipped with a self-weight drop prevention unit which is fastened to an upper press to prevent the upper press from dropping due to its own weight when the external power source is cut off or the power of the lift motor is cut off. Therefore, when power is applied to the press apparatus of the present invention, the switching rod of the electromagnet switch of the self-weight fall prevention unit is pulled in, so that the ratchet and the ratchet gear are separated. When the power to the rising motor is cut off, The gears are engaged. Therefore, when the power supply to the press apparatus is interrupted, the upper press is attempted to fall due to its own weight, because the lift drive unit can not perform its function. At this time, the ratchet and the ratchet gear of the weight drop preventing unit are engaged with each other, Thereby preventing safety accidents.

The up-and-down operation cam and the pusher of the present invention are further provided with up-and-down stroke adjusters for moving the upper end of the pusher to the front or rear side of the frame so as to adjust the lifting stroke of the pusher. Therefore, when the stroke adjusting screw of the upper and lower stroke adjusting section is rotated, the moving block is transferred back and forth in the lifting operation cam, so that the pusher shaft is transported together with the moving block so that the eccentric distance between the worm wheel shaft and the pusher shaft is changed, The stroke of the lifting device is changed. Therefore, since the lifting stroke of the pusher is changed only by a relatively simple operation of rotating the stroke adjusting screw of the upper and lower stroke adjusting portion clockwise or counterclockwise, adjustment of the lifting stroke of the pusher is very simple.

1 is a schematic perspective view showing a press apparatus having improved power saving and safety according to the present invention.
Fig. 2 is a partially separated perspective view showing the essential part of Fig.
Figure 3 is a schematic front view of Figure 1;
Figure 4 is a schematic rear view of Figure 1;
Figure 5 is a schematic plan view of Figure 1
6 is a schematic perspective view showing a lift driving part, an elevation driving part, and a pusher releasing part,
7 is a schematic exploded perspective view showing a state in which the upper press, the lift driving portion, the lift driving portion, the press driving portion,
8 is an exploded perspective view showing the press driving section and the vertical stroke adjusting section
9 is an exploded perspective view of Fig. 9
10 is a schematic partial cross-sectional view showing a press driving portion and a vertical stroke adjusting portion
11 is a schematic partial excerpt showing the operating state of the pusher release portion
Fig. 12 is a partial back view showing the self-
Fig. 13 is a schematic partial side sectional view showing the operating state of the self-
14 to 19 are safety press devices according to an embodiment of the present invention.

Specific features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic perspective view showing a press apparatus with improved power saving and safety of the present invention, FIG. 2 is a partially separated perspective view excerpted from a main part of FIG. 1, and FIG. 3 is a schematic front view of FIG. Fig. 4 is a schematic rear view of Fig. 1, Fig. 5 is a schematic plan view of Fig. 1, and Fig. 6 is a schematic perspective view of a lift driving part, an elevation driving part and a pusher releasing part. 9 is an exploded perspective view showing a press driving unit and a vertical stroke adjusting unit, and FIG. 9 is an exploded perspective view of FIG. 9, and FIG. 9 is an exploded perspective view of the press driving unit and the vertical stroke adjusting unit. to be. 10 is a schematic partial cross-sectional view showing a press driving unit and a vertical stroke adjusting unit, FIG. 11 is a schematic partial extractor showing an operating state of the pusher releasing unit, FIG. 12 is a partial back view showing a self- Sectional views showing the operating states of the drop preventing portions.

The press device of the present invention having improved power saving and stability is provided with a frame 10, an upper press 30, a lift drive part 40, an elevation drive part 50, a press drive part 60, a pusher release part 80, A weight drop preventing portion 90, and an upper and lower stroke adjusting portion 100.

The frame 10 is provided with a front plate 11 and a rear plate 12. The front plate 11 is provided with a top sensing sensor 13 and a bottom sensing sensor 13 for detecting the rising position and the falling position of the upper press 30, (14) are provided. A lower die 20 is provided below the frame 10 to face the upper press.

The upper press 30 is installed on the frame 10 so as to move up and down, and processes the material placed on the lower die 20. The upper press (30) is provided with a first rack (31) and a second rack (32). The first rack 31 is connected to a lift driving part 50 to be described later and the second rack 32 is connected to a lift driving part 40.

An elevation sensor 57 is installed on the upper press 30 and detects the elevation position of the upper press 30 when the elevation sensor 57 is raised to face the upper sensing sensor 13, 57 are lowered and are opposed to the lower end sensing sensor 14, the lower end of the upper press 30 is sensed.

The upper press (30) is provided with a striking part (33). An upper end 34 is formed at the upper end of the striking part 33 and a lower end of a pusher 77 to be described later is supported at the lower end of the upper press 30 when the upper press 30 is lowered.

The lift driving unit 40 is installed on the frame 10 and connected to the upper press 30 to move the upper press 30 upward to maintain the initial state when power is applied.

The lifting drive unit 40 includes a lifting motor 41 mounted on the frame 10, a lifting drive gear 43 coupled to the lifting motor shaft 42 of the lifting motor 41, And a raised second electric transmission gear 46 (46) connected to the raised first electric transmission gear 44 by a lift transmission shaft 45 and meshed with the second rack 32. The raised first electric transmission gear 46 ).

The lifting drive unit 50 is installed on the frame 10 and is connected to the upper press 30 to move the upper press 30 up and down within the lift stroke distance.

The lifting and lowering drive unit 50 includes an elevating motor 51 mounted on the frame 10, an elevating driving gear 53 provided on the elevating motor shaft 52 of the elevating motor 51, A lifting and lowering transmission gear 56 coupled to the lifting and lowering transmission shaft so as to idle; and a lifting gear 51 that is coupled to the lifting gear 1, And an elevation sensor 57 installed on the upper press 30 and lifted and lowered together with the elevation sensor 57.

The press driving unit 60 is installed in the frame 10 and the upper press 30 is lowered by the lifting and lowering driving unit 50 so that the lower end of the pusher 77 is positioned at the upper end of the hitting portion 33 of the upper press 30 The pusher 77 is pressed downward to process the material.

The press drive unit 60 includes a press motor 61 installed in the frame 10, a drive pulley 63 coupled to the press motor shaft 62 of the press motor 61, A first worm shaft 65 and a second worm shaft 68 which transmit the power of the press motor 61 to the pusher 77 and a second worm shaft 65 which is coupled to the first worm shaft 65 and transmits rotational power of the press motor 61 And a first power transmission belt 66 for transmitting the rotational power of the press motor 61 connected to the drive pulley 63 and the first power pulley 66 to the first worm shaft 65 A second electromotive pulley 67 and a third electromotive pulley 69 respectively coupled to the first worm shaft 65 and the second worm shaft 68 and a second electromotive pulley 67 and a third electromotive pulley 69 69 for transmitting the rotational power of the press motor 61 transmitted to the first worm shaft 65 to the second worm shaft 68 and the second worm shaft 68 for transmitting the rotational power of the press motor 61 to the first worm shaft 65, A first worm 71 and a second worm 72 which are respectively coupled to the worm shaft 68 and a second worm 72 which is connected to the pusher 77 A worm wheel shaft 75 for transmitting the power of the press motor 61 to the pusher 77 and a worm wheel shaft 75 provided on the worm wheel shaft 75 and meshing with the first worm 71 and the second worm 72, A first worm wheel 73 and a second worm wheel 74 that transmit the power transmitted to the worm 71 and the second worm 72 to the worm wheel shaft 75 and a worm wheel shaft And a pusher 77 which is connected to the lift operation cam 76 and is lifted and lowered when the lift operation cam 76 is rotated.

Stroke adjusting screws 102 and 79 are formed in the elevating operation cam 76 and a moving block 101 to be described later is built in the stroke adjusting screws 102 and 79. The moving block 101 is transported back and forth in the stroke adjusting screws 102 and 79 when the stroke adjusting screw 102 is rotated.

The pusher 77 is connected to the moving block 101 by a pusher shaft 78 and the pusher 77 of the pusher shaft 78 is fed together when the moving block 101 is transported.

A spring 79 is connected to the upper end of the pusher 77 and the rear plate 12 of the frame 10 so that the lower end of the pusher 77 is urged toward the front plate 11 side of the frame 10, .

The pusher releasing portion 80 pushes the pusher 77 to release the upper press 30 from the hitting portion 33 when the upper press 30 is lifted up when the material is processed by the press driving portion 60 provided in the frame 10. [ The pusher release portion 80 includes a release cam 81, a transmission piece 83, and an interlocking pin 82.

The release cam 81 is coupled to the lifting and lowering drive shaft 55 of the lifting drive unit 50 and is rotated together with the lifting and lowering drive shaft 55 when the lifting motor 51 of the lifting drive unit 50 is driven, To the rear side of the frame 10 so that the end of the pusher 77 is separated from the upper end of the striking portion 33. [

The transmission piece 83 is integrally formed with the elevating device 2 transmission gear 56 of the elevation driving part 50 engaged with the first rack 31 of the upper press 30 and rotates together with the elevating device 2 transmission gear 56 And an arc-free non-conducting groove 84 is formed in the periphery.

The interlocking pin 82 protrudes to one side of the releasing cam 81 and is rotated together with the releasing cam 81 and is positioned in the electroless groove 84 of the rolling piece 83. [

The pusher releasing portion 80 rotates only the releasing cam 81 and the interlocking pin 82 when the elevating and lowering transmission shaft 55 rotates within the forming range of the non-electric groove 84 to strike the lower end of the pusher 77 When the lifting and lowering transmission shaft 55 is rotated so that the interlocking pin 82 is continuously rotated after being supported by one side of the non-electric groove 84, the rotational power of the interlocking pin 82 is transmitted Piece 83 to rotate the power transmission piece 83 and the elevating agent 2 transmission gear 56. [

The weight drop preventing unit 90 is installed on the frame 10 and is fastened to the upper press 30 when the external power is cut off or the power of the up motor 41 is cut off so that the upper press 30 Thereby preventing it from falling. The weight drop preventing portion 90 includes a ratchet gear 91, a ratchet 92, and an electromagnet switch 94.

The neck gear is fixed to the upper press (30) and is lifted and lowered together with the upper press (30). The ratchet 92 is mounted on the frame 10 with the hinge shaft 93 to engage and disengage the ratchet gear 91.

The electromagnet switch 94 is installed in the frame 10 and connected to the ratchet 92 so that when the power is applied to the lifting motor 41 of the lifting drive part 40, the switching rod 95 is pulled, The switching rod 95 is pulled out to the outside so that the ratchet 92 is engaged with the ratchet gear 91 when the power is cut off from the ratchet gear 91.

The upper and lower stroke adjusting portion 100 is connected to the elevating operation cam 76 and the pusher 77 so that the upper end of the pusher 77 is moved to the front or rear side of the frame 10, . The upper and lower stroke adjusting unit 100 includes a moving block 101 and a stroke adjusting screw 102.

The moving block 101 is embedded in the internal space 79 inside the lifting operation cam 76 and is adapted to be moved back and forth along the internal space 79 and the upper end of the pusher 77 is connected. The stroke adjusting screw 102 is engaged with the lifting operation cam 76 and the moving block 101 so that the moving block 101 is moved in the inner space 79 to adjust the position of the pusher 77.

The press apparatus with improved power saving and safety of the present invention having such a configuration operates as follows.

First, when the power switch (not shown) is turned on, the lift motor 41 of the lift driver 40 is driven. When the lifting motor 41 is driven, the lifting motor shaft 42 and the lifting drive gear 43 are rotated, and thereby the lifting first transmission gear 44, the lifting power transmission shaft 45, the lifting second power transmission gear 46 Is driven. Accordingly, the upper rack 30 is raised while the second rack 32 meshed with the upper second power gear 46 is interlocked. At this time, when the elevation sensor 57 fixed to the upper press 30 is opposed to the upper sensing sensor 13, the elevation stops.

When the upper press 30 is moved upward to be in the initial state, the work to be machined is placed on the lower die 20 and the operation switch (not shown) of the elevation driving unit 50 is turned on. The elevation motor shaft 52 and the elevation driving gear 53 are rotated and the elevation gear 1 transmission gear 54, the elevation transmission shaft 55, the release cam 51 81, the electric motor 83, and the elevating agent 2 transmission gear 56 interlock with each other. When the lifting gear 2 transmission gear 56 is rotated, the upper rack 30 is lowered while the first rack 31 meshed with the lifting gear 2 is interlocked. At this time, when the elevation sensor 57 fixed to the upper press 30 is opposed to the lower sensing sensor 14, the elevation motor 51 of the elevation driving unit 50 is stopped and the lowering of the upper press 30 is stopped.

When the upper press 30 is lowered, the lower end of the pusher 77 is supported by the upper step 34 at the upper end of the striking part 33 of the upper press 30. The lower end of the pusher 77 is resiliently supported by the spring 79 toward the front plate 11 side of the frame 10. Thus, when the upper press 30 is lowered, the lower end of the pusher 77 is elastically supported by the upper step 34 of the striking part 33. This pusher 77 is not pivoted toward the front side in the state of being caught by the upper step 34 due to the upper step 34 of the striking part 33 but is pushed backwardly.

When the lowering of the upper press 30 is completed, the press motor 61 of the press driving unit 60 is operated. When the press motor 61 is operated, the press motor shaft 62 and the drive pulley 63 are rotated so that the first transmission belt 64, the first transmission pulley 66, the second transmission pulley 67, The first worm axis 65 is interlocked. When the second electromotive pulley 67 is driven, the second electromotive belt 70, the third electromotive pulley 69, and the second worm shaft 68 are interlocked.

When the first worm shaft 65 and the second worm shaft 68 are rotated, the first worm 71, the second worm 72, the first worm wheel 73, the second worm wheel 74, the worm wheel shaft 75, . When the worm wheel shaft 75 is rotated, the lift operation cam 76 is rotated, whereby the pusher 77 connected to the lift operation cam 76 is lowered and raised. When the elevating operation cam 76 makes one rotation, the pusher 77 is lowered and elevated. When the pusher 77 is lowered, the upper press 30 is lowered, and the material is pressed and processed.

When the pusher 77 is lowered and raised to complete the introduction machining operation, the press driving section 60 is stopped and the elevation motor 51 of the elevation driving section 50 is reversely rotated. When the elevating motor 51 is reversely rotated, the elevation motor shaft 52 and the elevation driving gear 53 are rotated, and the elevation gear 1 transmission gear 54, the elevation transmission shaft 55, and the releasing cam 81 are interlocked.

When the release cam 81 is rotated, the interlocking pin 82 fixed to the release cam 81 rotates simultaneously with the release cam. The interlocking pin (82) is located in the non-powered groove (84) of the transmission piece (83). Therefore, even if the interlocking pin 82 is rotated, the power transmission piece 83 is not rotated within the forming range of the non-electric groove 84, and only the interlocking cam 81 and the interlocking pin 82 are rotated. The release cam 81 pushes the pusher 77 backward while moving the interlocking pin 82 in the space of the non-powered groove 84 and pushes the lower end of the pusher 77 to the upper step 34 .

When the lifting / lowering transmission shaft 55 continues to rotate after the pusher 77 is separated from the striking portion 33, that is, when the interlocking pin 82 continues to rotate after being supported by one side of the non-interlocking groove 84, Is transmitted to the electric motor 83 to rotate the electric motor 83 and the elevating agent 2 electric motor 56 fixed thereto. When the lifting gear 2 transmission gear 56 is rotated, the first rack 31 engaged with the lifting gear 2 is lifted and the upper press 30 is lifted.

When the upper press 30 is raised and the elevation sensor 57 reaches the upper sensing sensor 13, the elevation of the upper press 30 is stopped.

The press device of the present invention, which is easy to control safety and stroke and has improved power saving, has the following advantages.

First, the present invention includes a lift driving unit 40 installed in the frame 10 and connected to the upper press 30 to move the upper press 30 upward to maintain the initial state when power is applied, An elevating driving part 50 installed on the frame 10 and connected to the upper press 30 to raise and lower the upper press 30 within the elevating stroke distance; And a press driving unit 60 that presses the pusher 77 downward to process the material when the lower end of the pusher 77 is supported on the upper end of the impact unit of the upper press 30.

Therefore, the vertical stroke transfer with a relatively large stroke distance from the initial position in which the upper press 30 is raised to the lowered position immediately before the material processing is performed by the low-lift moving part 50, and the small vertical stroke transfer for material processing And is driven by a high-output press driving unit 60.

Therefore, most of the ascending / descending stroke of the upper press 30 is performed by the elevation drive unit 50 of low output, and the very small stroke for material processing is performed by the high-output press drive unit 60, so that the power consumption is minimized.

Secondly, the pusher 77 is moved up and down by the eccentric distance of the elevating operation cam 76 while the press motor 61 of the press driving unit 60 makes one rotation. The pushing force of the pusher 77 is increased as the rotation angle of the press motor 61 is increased and the lift distance of the pusher 77 is smaller and as the rotational angle of the press motor 61 is smaller, As the lift distance increases, the pushing force of the pusher 77 decreases.

While the press motor 61 is rotated at a relatively large angle of 360 degrees, the pusher 77 is lifted by a minimum distance for pressing the workpiece. Therefore, the pressing force of the material is maximized.

Thirdly, the pusher releasing portion 80 of the present invention is configured such that when the elevation motor 51 of the elevation driving portion 50 is rotated in the reverse direction after the work is processed by the press driving portion 60, the upper press 30 is raised 77 from the upper end 34 of the striking portion 33. [

Accordingly, when the elevation motor 51 of the elevation driving unit 50 is reversely rotated, the pusher releasing unit 80 is operated by the rotational power of the elevation motor 51 to separate the pusher 77 and the striking unit 33, Thereafter, the upper press 30 is raised.

Therefore, the releasing operation of the pusher and striking unit 33 and the upward operation of the upper press 30 are sequentially performed only by the reverse rotation of the lifting motor 51, so that two operations are successively performed by one power source, The number of parts is reduced and the efficiency of the work is improved.

Fourth, the present invention provides a self-weight drop preventing unit 90 (see FIG. 1) for preventing the upper press 30 from falling due to its own weight when the external power is cut off or the power of the elevating motor 41 is cut off, .

Therefore, when power is applied to the press apparatus of the present invention, the switching rod 95 of the electromagnet switch 94 of the self-weight drop prevention unit 90 is pulled out, so that the ratchet 92 and the ratchet gear 91 are separated, The switching rod 95 of the electromagnet switch 94 is pulled out and the ratchet 92 and the ratchet gear 91 engage with each other.

Therefore, when the power supply to the press apparatus is interrupted, the upper press 30 tries to fall due to its own weight because the lift drive unit 40 can not perform its function. At this time, the ratchet 92 of the fall- (91) are engaged with each other to prevent free fall of the upper press (30), thereby preventing a safety accident.

Fifthly, in the elevating operation cam 76 and the pusher 77 of the present invention, the upper end portion of the pusher 77 is moved to the front or rear side of the frame 10 to adjust the up and down strokes of the pusher 77 (100) is further provided.

Therefore, when the stroke adjusting screw 102 of the upper and lower stroke adjusting section 100 is rotated, the moving block 101 is transferred back and forth in the lifting operation cam 76, so that the pusher shaft 78 is moved in the moving block 101 The eccentric distance between the worm wheel shaft 75 and the pusher shaft 78 is changed, and accordingly, the lift stroke of the pusher 77 is changed.

Therefore, since the lifting stroke of the pusher 77 is changed by a relatively simple operation of rotating the stroke adjusting screw 102 of the vertical stroke adjusting unit 100 clockwise or counterclockwise, the adjustment of the lifting stroke of the pusher 77 is very simple Do.

The basic concept of press equipment is to provide a balancing effect by using a plurality of cylinders (pneumatic or hydraulic). For example, if the elevator is 10 tons like the balance weight used in the elevator, the balance weight of 10 tons is put on the opposite side, and the elevator is raised and lowered with much less force. If the proper space is not secured by the specific mechanical structure, The following is a principle in which when a finger or the like enters the space, it fails to secure space and does not generate a pressing force.

If we assume that the same force is applied, the size is reduced to about one third of that of conventional mechanical press equipment, and energy consumption and noise are also reduced in proportion to the size.

Figs. 14 to 19 are two mechanical devices including a safety press, one of which is a safety press only, and the other of the left side is a device that fills perfume in a small container together with a safety press and plays a role of blocking with vinyl or the like. Both machines have a press function. Both equipments have the same iron plate on the wall. After the rail is installed, the block is attached, the structure corresponding to the press is fixed on the block, and the press body is moved using the air pressure in the cylinder. In this case, When the air pressure is applied, the bent shape becomes a one-letter shape, and the force is received. In this case, it can be produced at a very low cost.

Claims (1)

A lower die 20 on which a work to be processed is placed and which is mounted on the frame 10 and an upper press 30 which is installed on the frame 10 so as to be moved up and down As a result,
A lift driving unit 40 installed in the frame 10 and connected to the upper press 30 to move the upper press 30 upward to maintain the initial state when power is applied;
An elevation driving part 50 installed on the frame 10 and connected to the upper press 30 to elevate the upper press 30 within the elevating stroke distance;
When the lower end of the pusher 77 is supported on the upper end of the striking portion 33 of the upper press 30 after the upper press 30 is lowered by the lifting and lowering driving portion 50, A press driving unit 60 for pressing the material downward;
A pusher releasing portion 80 installed on the frame 10 and pushing the pusher 77 to release the upper press 30 from the hitting portion 33 so that the upper press 30 is raised when the material is processed by the press driving portion 60;
The weight of the upper press 30 is prevented from dropping due to its own weight when the external power is cut off or the power of the elevating motor 41 is cut off, (90) is further provided,
The apparatus according to claim 1, wherein the weight drop preventing portion (90) comprises a ratchet gear (91) fixed to the upper press (30) and lifted and lowered together with the upper press (30) And a ratchet 92 provided on the frame 10 and connected to the ratchet 92 to supply power to the lifting motor 41 of the lifting drive 40. The ratchet 92 is connected to the ratchet 92 , And an electromagnet switch (94) for separating the ratchet (92) from the ratchet (91) when the power is cut off to the lift motor (41).

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