JPH06187Y2 - Device for fixing transmission shaft of transfer feed press - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a transmission shaft fixing device for a transfer feed press.

[Prior Art] As shown in FIG. 6, a conventional transfer feed press 57 is configured so that a slide drive 37 can be moved up and down through a group of gears and a connecting rod 36 by a press drive device 1 provided at an upper portion. At the same time, part of the power extracted from the press drive device 1 via the transmission shaft 2 is transmitted to the drive shaft 3, and the cam 4 and the link 5 provided on the drive shaft 3 are transmitted.
By tilting the tilting bar 6 via the feed bar 7, the feeding c and the returning f of the feed bar 7 are operated, and the work 8 is conveyed.

Further, a cam 9 is provided so as to be fitted on one end side of the drive shaft 3, and an input shaft 11 supported by a bed is reciprocally moved through a mechanical interlocking mechanism 10 to obtain a required space on the input shaft 11. Positioning rack 12 and pinion 13 provide multiple axes
The shaft 14 that transmits the rotational force to 14 and receives the rotational force is the bevel gear 1
5, 16 transmits rotational force to the spline shaft 17, and the pinion 18 meshed with the spline shaft 17 raises and lowers the feed bar 7 via the elevator rack 19 and the elevator platform 20, and clamps the fingers 21 provided on the feed bar 7. The work 8 is moved up and down d.

A cam 22 is provided so as to be fitted to the other end side of the drive shaft 3, and an input shaft 24 supported by a bed is reciprocally moved through a mechanical interlocking mechanism 23, so that a required space position on the input shaft 24 is provided. The rack 25 and the pinion 26 provided in the above are configured to transmit the rotational force to the plurality of shafts 27. The shaft 27 that receives the rotational force transmits thrust to the rack shaft 30 by the pinion 28 and the rack 29, and the rack shaft 33 receives the thrust through the rack 31 on the rack shaft 30, the tuning pinion 32, and the rack 34 of the rack shaft 33. Rack shaft 30,3
The left and right feedbars 7 are moved laterally toward and away from each other via the three feedbar support bases 35 connected to each other, so that the work 8 is gripped a and opened e.
At this time, the elevating rack 19 moves laterally together with the pinion 18 as the pinion 18 moves axially along the spline shaft 17. The power from the press drive device 1 causes the feed bar 7 to perform operations of gripping a, raising b, feeding c, lowering d, opening e, and returning f.

Further, in FIG. 6, 38 is the main motor of the press drive device 1,
39 is a main clutch, and 40 is a drive shaft that rotates when the main clutch 39 is inserted.

Further, in FIG. 6, 46 is a motor with a brake 48 equipped with a clutch 47 for adjusting the movement of the feed bar 7,
49 is a brake for ensuring safety that prevents the transmission shaft 2 from rotating when the press drive device 1 is stopped, 50 and 51 are hydraulic cylinders that separate the mechanical interlocking mechanism 10 and 23 from the cams 9 and 22 during maintenance, etc. 52 is a hydraulic cylinder for forcibly opening the feed bar 7 in an emergency, 53 is an air cylinder for bringing the mechanical interlocking mechanism 10 into contact with the cam 9 during operation, 54 is the left and right feed bars 7 toward the center of the line Urging air cylinder,
55 is an overload coupling with a clutch, and 56 is a mold.

Furthermore, as a conventional transfer feed press,
In addition to the above-mentioned device, JP-A-58-23523 and JP-A-63-252
No. 5 gazette, Jitsukai Sho 63-25220 gazette, etc.
In the transfer feed presses disclosed in these publications, similarly to the device shown in FIG. 6, the feed bar is gripped by a predetermined driving device, and ascends, feeds, descends, opens, and returns to sequentially feed the work and slide. The work is formed by moving up and down.

[Problems to be Solved by the Invention] In the transfer feed press 57 shown in FIG. 6, when any of the main brake 41, the micro-inching brake 43, the brakes 48, 49, etc. is damaged when stopped, , The slide 37 descends by its own weight, and the descending force is transmitted to the forward feed bar 7 through the overload coupling 55 and the transmission shaft 2, and the feed bar 7
May move suddenly.

Even if none of the brakes are damaged, releasing the pressure of the hydraulic cylinders 50, 51, 52 for maintenance or releasing the pressing force of the air cylinders 53, 54 for maintenance of the cams 9, 2
2. Depending on the stop position of the mechanical interlocking mechanism 10,23, unpredictable force such as gravity acts on the drive shaft 3 and the input shafts 11 and 24 to rotate the drive shaft 3 or the input shafts 11 and 24. Similarly to the above, the feed bar 7 may move forward and backward and move.

Further, also in the devices described in the above publications, when the pressure of the hydraulic cylinder is released or the pressing force of the air cylinder is released, the feed bar may move depending on the conditions due to gravity applied to the cam.

Thus, if the feed bar suddenly moves while the worker is working inside the equipment for maintenance or repair when the transfer feed press is stopped or the die is changed, it may cause personal injury. This is not preferable for safety.

The present invention has been made in view of the above circumstances, and an object thereof is to prevent the feed bar and the like from suddenly moving when the transfer feed press is stopped.

[Means for Solving the Problem] In the transfer feed press 57 according to the present invention, the driving force of the press drive device 1 for raising and lowering the slide 37 is transmitted to the feed bar 7 via the transmission shaft 2 in the transmission shaft 2. A disk 60 having teeth 59 on its outer circumference fitted to
A pair of engaging elements 78, 79 having teeth 77 capable of meshing with the teeth 59 of the disk 60, and the engaging elements 78, 79 are supported so as to be movable in the circumferential direction of the disk 60 while facing each other in the diametrical direction of the disk 60. The rotating mechanism B and the engaging elements 78, 79 are
A transfer shaft fixing device for a transfer feed press, comprising: a centripetal mechanism C for tilting toward the center of the shaft and an opening / closing mechanism A for supporting the engaging elements 78, 79 so that they can move toward and away from each other. It is such a thing.

[Operation] The rotating mechanism B causes the pair of engaging elements 78 and 79 to move to the disk 6 from each other.
It moves in the circumferential direction of the disk 60 while facing in the diametrical direction of 0, and at the same time, the centripetal mechanism C directs the pair of engaging elements 78, 79 toward the center of the disk 60, and the teeth 77 of the engaging elements 78, 79 are transferred to the disk 6
Align to tooth 59 of 0.

Next, when the pair of engaging elements 78, 79 are brought close to each other by the opening / closing mechanism A, the engaging elements 78, 79 and the teeth 59, 77 of the disk 60 are surely engaged with each other, and the rotation of the transmission shaft 2 is restricted.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

1 to 5 show an embodiment of the present invention, in which the same reference numerals as those in FIG. 6 represent the same parts.

A disc 60 having teeth 59 on its outer periphery is fixed to the lower portion of the transmission shaft 2 via a universal joint 58.

Further, a bracket 61 for inserting the transmission shaft 2 is fixed to a frame fixed to the foundation, and the oil motor 6 is attached to the bracket 61.
2. A drive device 65 such as a screw jack in which a rod 64 is freely extendable and retractable is attached to the transmission shaft 2 via a speed reducer 63. The central portion of the first small link 66 is pivotally attached to the tip of the rod 64 by a pin 67, and a center line connecting the pin 67 and the transmission shaft 2 is provided.
The corresponding ends of the dog-legged links 71 and the inverted dog-legged links 72 pivotally attached to the pins 69 and 70 provided on the bracket 61 so as to be symmetric with respect to 68 are pivotally attached at their central portions. The disk is pivotally attached to both ends of the small link 66 via second small links 73 and 74 and pins 75 and 76, respectively, and the discs are provided near the remaining ends of the dog-legged links 71 and the inverted dog-legged links 72, respectively. 60 teeth
An engaging element 78, 79 having a tooth 77 meshing with 59 is connected to the disk 60 via a third small link 80, 81 and a pin 82, 83, 83 '.
An opening / closing mechanism A is formed by pivotally connecting the engaging elements 78, 79 so as to face each other in the diametrical direction.

A drive device 87 such as a screw jack in which a rod 86 is extendable and retractable in a direction substantially parallel to the center line 68 via an oil motor 84 and a speed reducer 85 on the side of a V-shaped link 71 from the center line 68 of the bracket 61. Install. The tip of the rod 86 and the engaging element 78 on the doglegged link 71 side are connected via a fourth small link 88, a long link 89, and pins 90, 91, 83, and the center line 68 is transmitted on the bracket 61. A corresponding end of a connecting link 93, which is pivotally mounted at its central portion to a pin 92 provided between the shaft 2 and the pin 67, is pivoted to a midway portion of the long link 89 by using a pin 94. And the remaining end of the connecting link 93 and the engaging member 79 on the side of the inverted link 72 are connected to the short link 95 and the pin.
Pins 83, 94, 96, 83 'are pivotally attached to each other by using 96, 83' so as to form a parallelogram, and the engaging elements 78, 79 are opposed to each other in the diametrical direction of the disc 60, and the disc 60 is circumferentially arranged. A rotation mechanism B that moves to the right is formed.

The dog-legged link 71 and the inverted dog-legged link 7 of the engaging elements 78 and 79.
Protrusions 97 extending toward the V-shaped link 71 and the inverted V-shaped link 72 are formed at the corners of the surface on the second side, and the engaging elements 78 and 79 of the V-shaped link 71 and the inverted V-shaped link 72 are formed. Bolt the block 99 to the position corresponding to the protrusion 97 formed on the side surface.
100 and the spring 101 are attached so that they can be slightly displaced by the elasticity of the spring 101 in the direction orthogonal to the center line 68, and the surface of the block 99 on the side of the protrusion 97 is parallel to the center line 68 from the pin 82. A guide surface 98 for guiding the arcuate protrusion 97 that approaches the center line 68 as the distance from
Is formed to form a centripetal mechanism C that tilts the engaging elements 78 and 79 that move in the circumferential direction of the disk 60 while facing each other in the diametrical direction of the disk 60 so as to always face the transmission shaft 2.

As shown in FIG. 4, a non-contact type proximity sensor 103 is provided on one or both of the engaging elements 78, 79 from above to the teeth 59 of the disc 60 via a bracket 102 so that the teeth 59 of the disc 60 are separated from each other. Of the proximity sensor 103
The signal from is input to the control device 104.

Engagers 78, 7 of the doglegged link 71 and the inverted dogleg link 72
The detection piece 105 is attached to the end on the 9 side, and a pair of proximity sensors 106 and 107 are provided on the bracket 61 so as to sandwich the detection piece 105 from both sides in the direction orthogonal to the center line 68, and an engagement element 78, Enable to detect the open / closed state of 79.

A detection piece 108 is provided on the side of the end of the long link 89 on the drive device 87 side.
And a pair of proximity sensors 109 and 110 are provided on the bracket 61 so as to sandwich the detection piece 108 from both sides in the direction parallel to the center line 68, and the disc 61 of the engaging elements 78 and 79 is provided.
The rotation state can be detected in the circumferential direction.

The signals from the proximity sensors 103, 106, 107, 109, 110 are input to the control device 104, and the command from the control device 104 is input to the hydraulic units 111, 112 of the oil motor 84 to drive the drive devices 65, 87 for the opening / closing mechanism A and the rotating mechanism B. Be in control.

In addition, 113 is a doglegged link 71 provided on the bracket 61.
, 114 is a slide fixing device, and 115 is an input shaft fixing device.

Next, the operation will be described.

When operating the transfer feed press 57,
78 and 79 are separated from each other so that the tooth 77 is disengaged from the tooth 59 of the disk 60, the predetermined clutch is put in and the brake is released, and the main motor 38 is driven to drive the press drive device 1, and FIG. The work 8 is processed and transported in the same manner as in the above case.

When the transfer feed press 57 is stopped, the press drive device 1 is stopped by stopping the main motor 38, the predetermined clutch is cut and the brake is applied, and the transmission shaft fixing device is operated as follows.

That is, first, the control device 104 sends a command to the hydraulic unit 112 of the oil motor 84 to drive the oil motor 84, and the rod 86 of the drive device 87 is extended or contracted via the oil motor 84 and the speed reducer 85 to rotate the oil 86. One of the engaging elements 78 is moved in the circumferential direction of the disk 60 via the small link 88 and the long link 89 of the moving mechanism B. Along with this, the connecting link 93 pivotally attached to the long link 89 swings around the pin 92 and moves the short link 95 in the opposite direction to the long link 89, so that the other engaging element 79 is an engaging element.
79 and the disk 60 are moved in the circumferential direction of the disk 60 while facing each other in the diameter direction.

At the same time, the engaging elements 78 and 79 are displaced relative to the inverted V-shaped link 71 and the inverted V-shaped link 72, respectively, and the projection 97 formed on the engaging elements 78 and 79 by the centripetal mechanism C has a V-shaped link. 71, since the engaging elements 78, 79 are tilted along the guide surface 98 by being guided by the guide surface 98 of the block 99 attached to the inverted U-shaped link 72, the engaging elements 78, 79 are always directed toward the transmission shaft 2. Be directed.

At this time, the proximity sensor 103 provided on the engaging element 78 is the disk 60.
Detects the position between the teeth 59 of the tooth and sends a signal to the controller 104,
The control device 104 uses the signal from the proximity sensor 103 to
When 60 and the teeth 59, 77 of the engaging elements 78, 79 are in phase, a command is sent to the hydraulic unit 112 to stop the oil supply to the oil motor 84, and the rod 86 of the drive device 87 is expanded or contracted. By stopping the movement of the engaging elements 78 and 79 in the circumferential direction of the disc 60, the disc 60 and the engaging element 7 are stopped.
Align teeth 59,77 of 8,79.

After the disk 60 and the teeth 59, 77 of the engaging elements 78, 79 are aligned, the control device 104 sends a command to the hydraulic unit 111 of the oil motor 62 to drive the oil motor 62, and the oil motor 6
2, the rod 64 of the drive device 65 is extended or contracted via the speed reducer 63, whereby the small links 66, 73, 74 of the opening / closing mechanism A, the dog-legged link 71, the inverted dog-legged link 72, the small link 80, The engaging elements 78 and 79 are brought close to each other via 81 to engage the engaging elements 78 and 79 with the disk 60.

As a result, the rotation of the transmission shaft 2 is restricted and the feed bar 7
Is prevented from falling, opening and closing, moving forward and backward, and even if a worker enters the transfer feed press 57 to perform maintenance or the like, an accident does not occur and safety is ensured.

When restarting the transfer feed press 57, the engaging elements 78 and 79 are separated from the disk 60.

Due to the rotating mechanism B, the pair of engaging elements 78, 79 is always in the disk 6
Since the operation is performed while keeping the diametrically opposed direction of 0, the engaging elements 78 and 79 can always restrain the most effective position of the disk 60, and the rotation of the transmission shaft 2 can be reliably prevented with a small force. can do.

Further, since the pair of engaging elements 78 and 79 are always tilted by the centripetal mechanism C so as to be directed toward the center of the disk 60, the teeth 59 and engaging elements of the disk 60 are used by using the proximity sensor 103 attached to the engaging element 78. Despite aligning the teeth 77 of 78, 79, it seems that the teeth 78, 79 cannot be meshed with the disk 60 because the teeth 59, 77 are out of phase as the teeth 78, 79 approach the disk. This is prevented, and the engaging elements 78, 79 can always be reliably engaged with the disk 60.

Further, when the proximity sensor 103 is provided on both the engaging elements 78, 79, even if foreign matter is caught between the one engaging elements 78, 79, the sensor on the other engaging element 78, 79 side Since detection can be performed at 103, high reliability of control can be obtained.

The transmission shaft fixing device of the transfer feed press of the present invention is not limited to the above-mentioned embodiment, and the proximity sensors 106, 107, 109, 110 provided on the long link 89 and the doglegged link 71 are the engaging elements 78, 79. In addition to being used for detecting the state of, the position control of the engaging elements 78, 79 may be used, and other various changes may be made without departing from the gist of the present invention. Of course.

[Advantages of the Invention] As described above, according to the transmission shaft fixing device of the transfer feed press of the present invention, the following excellent effects can be obtained.

Since the rotation of the transmission shaft is reliably restrained while the transfer feed press is stopped, the feed bar is prevented from moving up and down, opening and closing, and moving forward and backward, thereby improving safety.

By the rotating mechanism, the pair of engaging elements are always moved in the circumferential direction of the disk while facing each other in the diametrical direction of the disk, so that the engaging element can always restrain the most effective position of the disk. The force can reliably prevent the transmission shaft from rotating.

By the centripetal mechanism, the pair of engaging elements are always tilted so as to face the center of the disk, so that the engaging elements can be reliably meshed with the disk.

[Brief description of drawings]

FIG. 1 is a perspective view of a transfer feed press having an embodiment of the present invention, FIG. 2 is a plan view of a transmission shaft fixing device provided in FIG. 1, and FIG. 3 is a schematic left side of FIG. FIG. 4 is an enlarged view of a half portion, FIG. 4 is a partial side view showing a state in which a proximity sensor is attached to an engaging element, FIG. 5 is a control circuit diagram used in the present invention, and FIG. 6 is a perspective view of a conventional transfer feed press. Is. In the figure, 1 is a press drive device, 2 is a transmission shaft, 7 is a feed bar, 37 is a slide, 57 is a transfer feed press, 59 and 77 are teeth, 60 is a disc, 78 and 79 are engaging elements, A is an opening / closing mechanism, B indicates a rotating mechanism, and C indicates a centripetal mechanism.

Claims (1)

[Scope of utility model registration request] 1. A press drive device 1 for raising and lowering a slide 37.
In the transfer feed press 57, which is configured to transmit the driving force of the transmission shaft 2 to the feed bar 7 through the transmission shaft 2, the disc 60 having teeth 59 on the outer periphery fitted on the transmission shaft 2
And a pair of engaging elements 78, 79 having teeth 77 capable of meshing with the tooth 59 of the disk 60, and the engaging elements 78, 79 are movable in the circumferential direction of the disk 60 while facing each other in the diametrical direction of the disk 60. A rotating mechanism B for supporting the engaging elements 78, 79, a centripetal mechanism C for supporting the engaging elements 78, 79 so that they can be tilted always toward the center of the disk 60, and an opening / closing mechanism A for supporting the engaging elements 78, 79 so that they can move toward and away from each other. A transmission shaft fixing device for a transfer feed press, characterized in that