JPH0144181Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a transfer device for a press, and more specifically, uses the rotation of an eccentric device that drives a ram of a press as a drive source, and uses at least one of the drive units provided on both the left and right sides of a bolster. The present invention relates to a transfer device that introduces the driving force into one side and sequentially transfers pressed materials, semi-finished products, and finished products (hereinafter simply referred to as "workpieces") to the next process.

The transfer device of a conventional press moves the workpiece in the direction (referred to as the X-axis direction) to the processing position for the next process, moves the upper die and lower die toward each other, moves away from each other, and grips the workpiece. The movement in the direction of release (called the Y-axis direction) is the rotation angle of the eccentric device that drives the ram of the press, or in other words, it must be precisely synchronized with the movement of the ram, and in order to adjust the timing. cams, etc. were required, and the structure was complicated.

The present invention has been devised to solve the above-mentioned disadvantages of the conventional apparatus, and preferred embodiments thereof will be described in detail below with reference to the drawings.

FIGS. 1 and 2 show an embodiment in which transfer devices 1 are provided on the left and right sides (in the X-axis direction) of a bolster 5 of a mechanical press 3 having a C-shaped frame.

That is, the rotation of the shaft of an eccentric device (not shown) that drives the ram 7 built in above the mechanical press 3 is guided to the drive unit 11 on the left side of this embodiment through the transmission shaft 9.

In this embodiment, the drive unit 13 on the right side is a small one that does not include a drive mechanism in the It is also possible to install them and drive them symmetrically.

The transmission shaft 9 described above is supported by a bearing 15 provided on the left leg of the press 3, and a timing belt 23, for example, is wound around a gear 17, a tension roller 19, and a driven gear 21, which are mounted slightly above the bearing 15. The rotation of the eccentric device of the press 3 is accurately transmitted to the rotating shaft 25 which protrudes below the drive unit 11.

As shown in FIG. 3, the drive unit 11 on the left side has a lid 31 with a handle 29 above the frame 27, and a bearing 33 that vertically holds the rotating shaft 25 at the bottom of the frame 27. is provided.

A cam 35 is fixed to the upper end of the rotating shaft 25 with a key 37, and an eccentric pin 39 is implanted in the cam 35.

Bearing 33 below rotating shaft 25 and driven gear 21
A beam member 43 that rotatably supports the tension roller 19 via a bearing 41 is provided between the beam member 43 and the tension roller 19 as shown on the right side of FIG.
The other end is provided with an elongated hole block 45 having an elongated hole in the direction in which the beam member 43 swings around the rotating shaft 25 (see FIG. 5).

A support post 47 passing through the elongated hole block 45 described above is fixed downward from the bottom plate of the frame 27, and an adjustment bolt 4 that abuts the support post 47 on the elongated hole block 45.
9 is provided horizontally.

Further, a shaft column 51 is provided upward on the bottom plate of the frame body 27, and a swinging arm member 55 is connected via a bearing 53.
This swing arm member 55 is provided with a cam follower roller 57 that comes into contact with the cam 35 described above.

As shown in FIGS. 3 and 4, the cam 3 described above
Two Xs horizontal to the frame 27 are placed at a height above 5.
Axis guide devices 59, 59 are provided, and a movable table 61 is provided which is guided by the X-axis guide device 59 and is slidably movable in the X-axis direction.

As shown in FIGS. 3 and 7, between the portion of the lower surface of the moving table 61 that is penetrated by the X-axis guide device 59, there is a downward direction in the Y-axis direction that forms part of the motion conversion device 63 in the V-blocks 65, 65, which are formed into open grooves and form a Y-axis direction guiding device, are provided on the opposing surfaces.
is attached.

Y-axis sliders 67, 6 that are guided by the above-mentioned opposing V blocks 65, 65 and are slidable in the Y-axis direction.
7 is provided.

The Y-axis slider 67 has the aforementioned V block 65,
It has a sliding convex surface that comes into contact with the groove slope of 65, and is assembled in a cross-shaped shape by two connecting pins 69, 69, and is guided by these two connecting pins 69, 69 in the X-axis direction. Slidingly movable X-axis slider 71
is provided.

The above-described X-axis slider 71 is connected to the upper end of the above-mentioned eccentric pin 39 at the lower center surface, and performs the same circular motion as the eccentric pin 39, but the Y-axis direction movement in the circular motion is Sliders 67, 67 are V block 6
5, 65, move and digest.

However, the amount of movement in the X-axis direction corresponds to the four bullets 75 with the same biasing force compressed and fitted between the bullet receiving holes 73 provided on both sides of the X-axis slider 71 and the Y-axis sliders 67, 67.
The movable table 61 is driven to move in the X-axis direction.

Thus, the overall X-axis motion conversion device 63
converts the circular motion of the eccentric pin 39 into linear motion in the X-axis direction.

By the way, when the eccentric pin 39 is in the neutral position with respect to the X-axis direction as shown in FIGS. Centrally located.

Further, as shown in FIG. 7 for the movement of the moving table 61 in the X-axis direction, the distance d between the Y-axis slider 67 and the X-axis slider 71 is determined by The dimensions on both sides are the same.

In the transfer device 1 of this embodiment, an annular stopper 77 having a thickness not larger than the above-mentioned dimension d is provided at both stroke ends of the X-axis guide device 59.
is provided.

Therefore, the stroke length of the moving table 61 is shorter than twice the eccentricity of the eccentric pin 39, and the moving table 61 reaches the stopper 77 at both stroke ends.
After being stopped and stopped, the X-axis slider 71 is driven by the eccentric pin 39 and continues to approach the Y-axis slider 67 until the stroke end while compressing the bullet 75.

Next, as shown in FIGS. 3 and 4, the moving body 61
Two parallel round bars are provided on the top surface as a Y-axis guide device 79, and a pair of gripping claw support bar holders 81 are provided facing each other astride these, as shown in FIG. Gripping claw support rods 83 extend horizontally and in parallel across the left and right drive units 11 and 13 at the same height.

The portion of the gripping claw support rod holder 81 that holds the gripping claw support rod 83 is constructed as shown in FIGS. 4 and 8.

That is, the gripping claw support rod 83 is made of a square piece of wood,
A groove 85 having slopes on both sides in the X-axis direction is provided in the vertical direction of a portion that abuts one side (for example, the outside) of the gripping claw support rod holding base 81.

On the other hand, a dog pin 91 having a truncated conical protrusion 87 that can be freely engaged with and disengaged from the groove 85 at one end and a dog 89 at the other end is attached to the gripping claw support bar holder 81 by a bullet 93.
The groove 85 is biased by the above-mentioned groove 85.

An actuator of a detection device 95 such as a micro switch is brought into contact with the dog 89, and when the gripping claw collides with an obstacle during transfer of the workpiece, the gripping claw support rod 83 is moved due to the slope. and detaches from the truncated conical protrusion 87 and stops moving.
The dog pin 91 protrudes against the biasing force of the ammunition 93, and the detection device 95 sends a signal indicating the occurrence of an abnormality.

Next, referring mainly to FIGS. 4, 5, and 6, a mechanism for moving the pair of gripping claw support rods 83 toward and away from each other will be explained.

As already explained with reference to FIG.
The swinging member 55 is caused to swing by a cam 35 attached to the cam 35 .

A horizontal rod 101 slides in the Y-axis direction near the tip of the swinging member 55 that forms part of the Y-axis motion conversion device 97 via a vertical shaft 99 whose position is variable in the radial direction of the swinging member 55. It is movable.

The above-mentioned horizontal rod 101 is provided with a rack 103 in a part thereof, and imparts rotational movement to a vertical pinion shaft 105 that engages with the rack 103.
As shown in FIG. 6, a gear 107 is fixed to the upper part of the pinion shaft 105, and a shaft portion 111 of a driven gear 109 having the same size and shape that engages with this gear 107.
A support 113 is provided on the frame 27 to rotatably support the pinion shaft 105 described above and also to guide the horizontal rod 101 described above.

As is clear from FIG. 6, there is a Y above the frame 27.
Two axial guide bars 115 are provided horizontally, and a drive holding table 117 is provided that straddles the guide bars 115 and moves the opposing gripping claw support rods 83 toward and away from each other in the Y-axis direction.

This drive holding stand 117 is the slide plate 11
9, the gripping claw support rod 83 is slidably guided in the X-axis direction.

Further, as shown in FIG. 6, an eccentric shaft pin 121 is provided on the upper surface of the gear 107 and the driven gear 109, which form a part of the Y-axis direction motion converting device 97, and the eccentric shaft pin 121 is swingable around the eccentric shaft pin 121. A link 123 is provided, and the other end of the link shaft 123 is connected to a bolt shaft 125 planted on the lower surface of the drive holding table 117 described above.

The horizontal rod 101 shown in FIG. 5 is attached to the frame 27 along the left side plate of the press 3 as shown in FIG.
A lever 129 is fixed to a connecting shaft 127 that protrudes further rearward and passes horizontally through the left and right side plates of the press 3.
It is connected to the upper part of the body by a connecting rod 131.

Further, the lever 129 described above is connected to the second
It is biased counterclockwise in the figure, and presses the cam follower roller 57 of the swing arm member 55 against the cam 35.

In this embodiment, the left drive unit 11 and the right drive unit 13 are not the same and have opposite sides, but
The motion conversion devices 97 in the Y-axis direction of both drive units operate synchronously by the above-mentioned connecting shaft 127.
The pair of gripping claw support rods 83 always maintain a parallel state and move toward and away from each other to perform clamping and unclamping operations.

The apparatus according to the embodiment of the present invention described in detail above moves in the Y-axis direction in which the gripping claw support rods 83 approach and separate from each other in conjunction with the eccentric device that drives the ram 7, and the pair of gripping claw support rods 83 The movement in the X-axis direction of moving to the processing position for the next process and returning while gripping the workpiece is driven by one cam 35 and an eccentric pin 39 implanted in a fixed position of this cam 35. As a result, we achieved the effect of eliminating timing deviations in operation in both directions.

In addition, a stopper 77 is provided to shorten the stroke length at both ends of the movement stroke in the X-axis direction, and at the same time, a gap d is provided between the X-axis slider 71 and the Y-axis slider 67 to move the bullet 75. By intervening, the displacement of the eccentric pin 39 in the X-axis direction after the gripping claw support rod 83 stops moving in the X-axis direction is absorbed by compressing the bullet 75, and then Since movement toward or away from the shaft is performed, a transfer device with less idle time has been obtained.

Furthermore, if the workpiece collides with an obstacle while moving in the X-axis direction, the gripping claw support rod 83 separates from the gripping claw support rod holder 81, and the detection device 95 issues a signal indicating the occurrence of an abnormality. This also has the effect of preventing damage to machines, tools, and workpieces by making an emergency stop of the press.

As can be understood from the above description of the embodiments, the gist of this invention is as stated in the claims for utility model registration. A sixth movement that reciprocates the support rod 83 in the left and right direction.
The left and right moving ends of No. 1 are regulated by a stopper 77. Therefore, the stop position of left and right movement is accurate. Note that when the movable table 61 stops moving in the left-right direction, the displacement of the eccentric pin 39 in the left-right direction is absorbed by compressing the ammunition 75.

That is, according to the present invention, the left and right movement stop position stoppers 77 of the movable table 61 are forcibly regulated;
Moreover, since the subsequent displacement of the eccentric pin 39 in the left and right direction is absorbed by the compression of the ammunition 75,
It does not require a cam or the like to control the timing for moving the moving table 61 in the left-right direction, and the structure can be simplified.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the device of the present invention;
The figure is a left side view of the same as above, FIG. 3 is a cross-sectional view taken along the arrow in FIG. 6 is a cross-sectional view of FIG. 4, FIG. 7 is a cross-sectional view of FIG. 3, and FIG. 8 is a cross-sectional view of FIG.
It is a - cross-sectional arrow direction view of a figure. Explanation of symbols representing main parts of the drawings: 1...Transfer device, 11...Left drive unit, 35
... Cam, 39 ... Eccentric pin, 55 ... Swinging arm member, 59 ... X-axis guide device, 61 ... Moving table, 6
3...X-axis motion conversion device, 67...Y-axis slider, 71...X-axis slider, 79...Y-axis guide device, 81... gripping claw support bar holder, 83... gripping Claw support rod, 95...detection device, 97...Y-axis direction motion conversion device, 117...drive holding stand.

Claims (1)

[Claims for Utility Model Registration] Frame 27 attached to bolster 5 of press 3
An X-axis guide device 59 extending in the left-right direction is provided, and a Y-axis guide device 79 in the front-rear direction is provided on a movable table 61 that is guided by the X-axis guide device 59 and is movable in the left-right direction. A pair of holding stands 81 movably supported by the device 79 are provided to support the ends of a pair of gripping claw bars 83 extending in the left-right direction, and a guide bar 115 in the front-rear direction provided on the frame body 27 is provided. The gripping claw support rod 83 is slidably supported in the left-right direction on a pair of drive holding stands 117 that are movably supported on the frame body 27 to rotate in conjunction with the eccentric shaft of the press 3. The gripping claw support rod 83 is rotated by the swinging arm member 55 that swings by the cam 35 provided on the rotary shaft 25 provided.
A transfer device for a press of a type in which the moving platform 61 moves back and forth in the left-right direction by converting the rotation of an eccentric pin 39 provided at an eccentric position of the cam 35 into a left-right movement. and a longitudinal guide section 6 provided on the movable table 61.
A pair of left and right Y-axis sliders 67, 67 that are engaged with the connector 5 so as to be movable in the front-back direction are provided to support both left and right ends of a connecting pin 69 extending in the left-right direction. A bullet 75 is interposed between the freely supported X-axis slider 71 and each Y-axis slider 67, 67 on both sides, and the eccentricity is provided at an eccentric position of the cam 35. A pin 39 is provided to engage with the X-axis slider 71, and the X-axis guide device 59
The movable base 6 is in contact with the movable base 61 at both ends of the movable base 6.
A transfer device for a press, characterized in that it is provided with a stopper 77 for regulating movement of the press.