JPH0567046B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention involves cutting a strip-shaped steel plate using a cutting machine to obtain a plurality of strip-shaped steel plates having sequentially different lengths, and sequentially changing the end position of each strip-shaped steel plate. The present invention relates to a stepped stacking apparatus for steel plates for an iron core, which forms a steel plate stack having stepped ends by stacking the plates while shifting them in the longitudinal direction.

[Prior Art] When manufacturing a wound core for use in static induction electric equipment such as a transformer, a band-shaped silicon steel plate is cut into a predetermined length according to the circumference of each laminated unit of the wound core. A strip-shaped steel plate 1 is obtained, and by stacking ten or more of these strip-shaped steel plates by sequentially shifting the position of each end by a predetermined shift distance d in the longitudinal direction, an eighth layer is formed in each stacked unit. A stepped steel plate laminate 2 as shown in the figure is formed. Then, the stepped steel plate laminate 2 is rolled up one after another by a winding machine as shown in FIG. 9, and both ends of each laminate are joined by wrapping the steel plates together to form a structure as shown in FIG. 10. A ring-shaped steel plate roll is formed. Next, this steel plate roll is formed into a rectangular shape as shown in FIG. 11, for example, and annealed to complete the wound core 4. Furthermore, the ninth
In the drawings to FIG. 11, reference numeral 3 indicates a joint portion of the steel plate laminate 1 in each laminate unit.

The shift dimension d of the steel plates when laminating the stepped steel plate laminate 2 is selected (usually 2 to 3 mm) so that the magnetic resistance of the joint 3 is minimized. It is desirable that the step be uniform throughout the stepped ends of the two.

Conventionally, when forming a steel plate laminate with stepped edges as described above, the laminate is stacked by aligning the ends of the steel plates and then repeatedly bent and stretched. Shift the edge positions of the steel plates that make up the body, or divide the laminated unit of steel plates into smaller units of about three pieces, and stack the steel plates while shifting the edge positions by a predetermined distance d with your fingertips. I was gone.

[Problems to be Solved by the Invention] In any of the above conventional methods for forming a stepped steel plate laminate, it is necessary to manually step the ends of the steel plate laminate. There were problems in that it required a lot of time and effort, and it required considerable skill to make the displacement dimensions of each steel plate uniform. Furthermore, since the step of forming the stepped steel plate laminate must be performed manually, there is a problem in that the core manufacturing process cannot be completely automated.

An object of the present invention is to provide a stepped stacking device for an iron core that can automatically form a steel plate stack having stepped ends.

[Means for Solving the Problems] The present invention involves sequentially shifting the end positions of a plurality of strip-shaped steel plates having sequentially different lengths obtained by cutting a strip-shaped steel plate with a cutting machine in the longitudinal direction. This machine is designed to automatically form a laminated steel plate having stepped edges by laminating the sheets together, with a space provided in front of the cutting machine and between the cutting machine and the cutting machine. A fixed table, a movable table disposed between the cutting machine and the fixed table and supported so as to be movable in the conveying direction of the steel plate, and a movable table that transfers the steel plate onto the movable table through the cutting blade. a first clamp that is provided to be displaced between a clamp position where the clamp is clamped against the clamp and a release position where the clamp is released and which is driven by a first clamp drive mechanism; a moving table drive mechanism that moves the moving table a predetermined amount toward the fixed table in order to feed the steel plate cut by the cutting machine to the fixed table, and returns the moving table to its original position; The steel plate is provided to be displaced between a clamp position where the steel plate clamped by the first clamp and fed to the fixed table side by the movable table drive mechanism is clamped to the fixed table and a release position where the clamp is released. The second clamp is driven by the second clamp drive mechanism, and the first clamp and the second clamp are driven by the second clamp drive mechanism while the cutting machine performs the cutting operation and while the movable table drive mechanism moves the movable table a predetermined distance toward the fixed table. The first clamp and the second clamp are moved to the release position and the clamp position, respectively, when the movable table drive mechanism moves the movable table a predetermined distance toward the fixed table. The present invention is characterized by comprising a synchronous drive mechanism that drives the first and second clamp drive mechanisms and the movable table drive mechanism in synchronization with the cutting machine so as to repeat the positioning operation.

[Operation of the invention] As described above, the steel plate is cut while being fixed to the movable table by the first clamp, the cut steel plate is moved to the fixed table side together with the movable table, and then the second clamp is moved to the fixed table side. By repeating the operation of fixing the steel plates in the clamped state to the fixing table and releasing the first clamp in synchronization with the operation of the cutting machine, the positions of the ends of the steel plates are shifted and the steps are stacked. The work can be performed automatically, and the stepped stacking process of the steel plates can be automatically performed following the process of cutting the steel plates.

While the cutting machine cuts the steel plate and while the moving table moves the steel plate a predetermined distance toward the fixed table, the first clamp clamps the steel plate against the moving table, so that the steel plate can be cut accurately. Moreover, since the cut steel plates can be moved to the fixed table side without causing positional displacement, it is possible to obtain a steel plate stack in which the displacement dimension of the steel plates at the stepped ends is uniform.

[Examples] Examples of the present invention will be described below with reference to the accompanying drawings.

Figures 1 to 7 show one embodiment of the present invention, with Figure 1 being a plan view showing the overall configuration, and Figure 2 being a plan view showing the overall configuration.
The figure is a sectional view taken along the - line in Fig. 1, Fig. 3 is an enlarged plan view of the main part, Fig. 4 is a sectional view taken along the - line in Figs. 1 and 3, and Fig. 5 is a - line sectional view in Fig. 1. from 1st
FIG. 6 is an enlarged rear view of the main parts of the second clamp and the drive mechanism of the first clamp, and FIG.
FIG. 7 is an enlarged side view of the main parts of the feed mechanism of the second clamp viewed from the line direction; FIG. FIG.

() Structure of the embodiment (a) Overall structure of the embodiment In FIGS. 1 and 2, 10 is a cutting machine;
This cutting machine has a fixed cutting blade 11 and a movable cutting blade 12.
(not shown in FIG. 1), and the movable cutting blade 12 is coupled to a cutting blade driving crankshaft 13. The crankshaft 13 is connected to a cutting machine drive motor 16 via a coupling ring 14 and a reduction gear 15.
is connected to the crankshaft 13 by the motor 16.
is driven, and the movable cutting blade 12 is driven.

A work loading table 17 is arranged on the feeding side of the cutting machine 10, and a work loading table 17 is placed in front of the feeding side of the cutting machine 10, on an extension of the transport table, and with a predetermined distance between it and the cutting machine 10. A fixed table 20 that is open and whose upper surface is horizontal is arranged. Further, a movable table 21 is disposed between the fixed table 20 and the cutting machine 10, and the movable table 21 is provided so that its upper surface is flush with the fixed table.
As seen in FIGS. 2 and 4, this movable table 21 is moved in the steel plate conveyance direction (X1
-X2 direction) so that it can reciprocate a predetermined distance.

A workpiece unloading table 25 is arranged parallel to the fixed table on the side (lower side in FIG. 1) of the fixed table 20, and the upper surface of this unloading table is flush with the upper surface of the fixed table 20. It is set in.

The fixed table 20 is supported via a support 28 on a first pedestal 27 extending parallel to the fixed table, and a second pedestal 29 is arranged below the first pedestal.

On the first pedestal 27, a feed screw side 31 and a spline shaft 33, which extend on the side of the fixed table in parallel to the conveying direction of the steel plate, and a spline shaft 33 are installed.
is positioned close to the fixed table 20. The feed screw shaft 31 and the spline shaft 33 are positioned slightly above the upper surface of the fixed table 20 by support legs (not shown) fixed to the first pedestal 27, and bearing members fixed to the support legs are positioned slightly above the upper surface of the fixed table 20. It is rotatably supported by.

Further, a conveying screw shaft 35 extending in the conveying direction of the steel plate is arranged on the side of the unloading table 25,
This conveying screw shaft 35 is rotatably supported by a bearing member fixed to the unloading table 25.

Although not shown, a conveyance mechanism for the belt-shaped steel plate is disposed on the side of the conveyance table 17, and this conveyance mechanism transfers the belt-shaped steel plate to the cutting blade of the cutting machine 10.
It is transported between 1 and 12.

(b) Configuration of first clamp and first clamp drive mechanism A first slider 37 is bolted to the end of the movable table 21 on the spline shaft 33 side.
This slider is supported by a guide rail 39 arranged along the feed screw shaft 31 and fixed to a rail frame 38 so as to be able to move a predetermined distance in the conveyance direction of the steel plate together with the moving table 21 (see Fig. 4). reference). A bearing member 40 is fixed to the first slider 37, and a support shaft 43 attached to the intermediate portion of a clamp arm 42 constituting the first clamp 41 is attached to the bearing member 40.
bearing. As shown in FIG. 4, the clamp arm 42 is arranged so as to extend in a direction perpendicular to the moving direction of the moving table 21, and a clamp head 45 is connected to a shaft 46 at one end of the crank arm on the moving table side. It is rotatably supported through. At the tip of the clamp head 45 is a bearing 47 disposed in a bearing box 47a.
A clamp end fitting 48 is slidably supported through the clamp. A stopper 49 for regulating the amount of movement of the tip fitting 48 is fitted into the upper end of the tip fitting 48 and fixed by a nut 50, and a pressing fitting 51 is attached to the lower end of the tip fitting 48. A pressing member 52 made of a material with a large coefficient of friction such as rubber is attached to the tip of the pressing fitting 51, and a spring 53 disposed between the pressing fitting 51 and the bearing box 47a causes the clamp tip fitting 48 to constantly move on the table. 21 side. In this embodiment, two clamp end fittings 48 supported with a similar structure are spaced apart in the direction of movement of the steel plate.
There are several. An air cylinder 54 is also attached to the tip of the crank arm 42, and a rod 54a of the air cylinder 54 is pivotally connected to the rear end of the clamp head 45. When the stacking work of a predetermined number of steel plates is completed, this air cylinder operates so that its rod advances to displace the clamp arm 42 away from the steel plates, thereby quickly releasing the first clamp. The air cylinder 54 returns to its original state after the stacked steel plates are completely unloaded.

The above clamp arm 42, clamp head 4
5 and the first clamp 41 by the tip fitting 48.
is configured. In this first clamp, when the rod 54a of the air cylinder 54 advances, the clamp head 45 rotates clockwise in FIG. The clamp head 45 rotates counterclockwise in FIG.
Displace to the side.

A roller-shaped cam follower 57 is attached to the rear end of the clamp arm 42, and a cam mounting plate 58 is slidably supported on the spline shaft 33.
, the first cam 5 that drives the cam follower 57
9 is attached with bolts 60. 1st
The cam 59 is provided with a cam groove 59a, and the cam follower 57 is fitted into this cam groove. When the spline shaft 33 is rotated by a mechanism to be described later, the first cam 59 is rotated and the clamp arm 4 is rotated.
It is designed to rotate 2.

The first cam 59 is provided with a hub 61, and a roller 63 attached to the slider 37 via a support member 62 is attached to a groove 61a provided around the hub 61.
is mated to. Therefore, when the movable table 21 is moved by a mechanism to be described later, the slider 37 supporting the first clamp 41 moves together with the movable table, and at the same time the first cam 59
moves along the axial direction of the spline shaft 33 (the direction in which the steel plate is conveyed).

The first cam 59 and the cam follower 57 constitute a first clamp drive mechanism. Clamp arm 42 by first cam 59
When is rotated clockwise in FIG. 4, the pressing member 52 separates from the steel plate A on the moving table 21, the first clamp 41 goes to the release position, and the clamp arm 42 rotates counterclockwise in FIG. When the pressing member 52 is rotated , the pressing member 52 comes into contact with the steel plate A and reaches a clamping position where the steel plate is fixed to the moving table 21 .

(c) Configuration of second clamp and second clamp drive mechanism The guide rail 39 also has a fixed table 2.
A second slider 65 that moves along 0 is slidably supported, and a second clamp 67 is supported by this second slider. As seen in FIG. 3, this second clamp 67
The second clamp arm 69 is supported by a slider 65 via a bearing 68, a clamp head 70 is rotatably attached to the tip of the clamp arm 69, a tip fitting 71, and an air cylinder 72. The clamp is the end fitting 71
The structure is similar to the first clamp 41 except that only one clamp is provided.

Similar to the air cylinder 72, the rod of the air cylinder 72 moves forward when the work of laminating a predetermined number of steel plates is completed, displacing the clamp arm 69 away from the steel plates, thereby causing the second Release the clamp immediately. The air cylinder 72 returns to its original state after the stacked steel plates are completely unloaded.

A nut 65a is provided on the second slider 65 supporting the second clamp 67, and the feed screw shaft 31 is screwed into this nut.
As the feed screw shaft 31 rotates, the second slider 65 moves in the steel plate conveying direction X1-X2.

As seen in FIG.
a second cam mounting plate 8 slidably supported by the second cam mounting plate 8;
A second cam 81 in the form of a disk is attached to the second cam 81, and a second cam follower 82 attached to the end of the clamp arm 69 of the second clamp is fitted into a cam groove provided in the second cam 81. ing.
Further, a roller 84 attached to the second slider 68 via a support member is fitted into a groove 85a of a hub 85 provided integrally with the second cam 81.

The second cam 81 and cam follower 82 constitute a second cam drive mechanism. When the second cam 81 rotates due to the rotation of the spline shaft 33, the clamp arm 69 of the second clamp 67 rotates, and the second clamp is displaced between the clamp position and the release position.

Further, when the second slider 65 is driven by the feed screw shaft 31 and slides, the second cam 81 moves together with the second slider.

(d) Configuration of moving table drive mechanism As shown in FIG. 5, the first slider 37
A feed adjustment arm 87 extending in the vertical direction is attached to the side surface on the spline shaft 33 side. This adjustment arm 87 has a long hole 87a extending along its longitudinal direction (vertical direction), and the bolt 8 is screwed into the slider 37 through the long hole.
8, it is attached so that its position can be adjusted in the vertical direction.

A drive bolt 89 is attached to the lower end of the feed amount adjustment arm 87 and projects in a direction perpendicular to the feed amount adjustment arm, and the drive bolt 89 is rotatable on a feed lever shaft 90 attached to the rail mount 38. It is in contact with the long lever portion 91a of the feed lever 91 supported by the feed lever 91. Feed lever 91
A short lever portion 91b is provided at a position opposite to the long lever portion 91a, and a cam follower 92 is attached to the tip of the short lever 91b.

The rail mount 38 also has a feed cam drive shaft 93.
is supported, and a cam follower 92 is fitted into a cam groove 94a of a disk-shaped feed cam 94 attached to this drive shaft 93. Further, the first slider 37 is urged toward the second slider 65 by a spring 95 provided between the first slider and a frame (not shown).

Feed rate adjustment arm 87, drive bolt 89,
The feed lever 91, cam follower 92, and feed cam 94 constitute a moving table drive mechanism, and when the feed cam drive shaft 93 is rotationally driven by the drive mechanism described later and the feed cam 94 rotates, the cam follower 92 is moved into the cam groove 94a. Accordingly, the feed lever 91 is displaced and rotated. When the feed lever 91 rotates clockwise in FIG. direction (X2 direction), thereby causing the movable table 21 to retreat a certain distance toward the cutting machine 10 and return to the origin. Furthermore, when the feed lever 91 rotates counterclockwise, the first slider 37 moves toward the second slider 65 (X1 direction) due to the biasing force of the spring 95, which causes the movable table 21 to move toward the fixed table 20. Sent a certain distance. The amount of movement of the first slider 37 can be adjusted as appropriate by adjusting the vertical position of the feed amount adjustment arm 87. That is, by moving the feed amount adjusting arm 87 downward, the amount of movement of the first slider 37 can be reduced, and conversely, by moving the feed amount adjusting arm 87 upward, the movement of the first slider 37 can be reduced. The amount (the amount of movement of the moving table 21) can be increased.

(e) Configuration of synchronous drive mechanism While the cutting machine 10 performs the cutting operation and while the movable table drive mechanism moves the movable table 21 a predetermined distance toward the fixed table 20, the first clamp 41 and the second clamp 67 are operated respectively. When the movable table drive mechanism moves the movable table 21 a predetermined distance toward the fixed table 21 side, the first
The first and second clamp drive mechanisms and the movable table drive mechanism are connected to the cutting machine 1 so as to repeat the operations of positioning the clamp 67 and the second clamp 67 in the release position and the clamp position, respectively.
A synchronous drive mechanism is provided for driving in synchronization with zero. In this embodiment, the synchronous drive mechanism includes a spline shaft drive mechanism, a feed cam drive shaft drive mechanism, a feed screw shaft drive mechanism, and a feed screw shaft return mechanism to its original position. These mechanisms will be explained below.

(e-1) Spline shaft drive mechanism and feed cam drive shaft drive mechanism As seen in FIG.
A second timing pulley 103 having the same diameter as the first timing pulley is attached to a clamp drive shaft 102 provided below the moving table 21. Further, a spline drive shaft 105 extending in a direction perpendicular to the clamp drive shaft 102 is provided, and the spline drive shaft 105 and the clamp drive shaft 10
2 by a worm gear (not shown), and the rotation of the clamp drive shaft 102 is transmitted to the spline drive shaft 105 with the direction changed by 90 degrees. Spline drive shaft 10
5 extends to a position below the end of the spline shaft 33 on the cutting machine side, and a third timing pulley 106 is attached to the end of the spline drive shaft 105. A fourth timing pulley 107 having the same diameter as the third timing pulley 106 is attached to the end. Also, a second timing pulley 1 is attached to the clamp drive shaft 102.
Fifth timing pulley 10 with a smaller diameter than 03
8 is attached, and a sixth timing pulley 109 is attached to the feed cam drive shaft 93 provided below the movable tail 21.

The first timing belt 110 is stretched between the first timing pulley 101 and the second timing pulley 103, and the second timing belt 110 is stretched between the third timing pulley 106 and the fourth timing pulley 107.
1 is crossed. The timing pulleys and the timing belt are constructed so as not to cause slips with respect to each other, and the timing pulleys rotate synchronously via the timing belt.

Therefore, the rotation of the crankshaft 13 of the cutting machine is transmitted to the spline shaft 33, and the spline shaft 33 rotates in synchronization with the operation of the cutting machine. In this embodiment, the spline shaft 33 rotates once while the crankshaft 13 rotates once and the cutting machine 10 performs one cutting operation.

Also, the fifth timing pulley 108 and the sixth timing pulley 108
A third timing belt 112 is stretched around the timing pulley 109, so that the feed camshaft 93 rotates once while the crankshaft 13 rotates once.

The first to fourth timing pulleys 1
01, 103, 106, 107 and the first and second timing belts 110 and 111 constitute a drive mechanism for the spline shaft 33, and the timing pulleys 101, 108 and 1
09 and the timing belt 112 constitute a drive mechanism for the feed cam drive shaft 93.

(e-2) Drive mechanism of the feed screw shaft As shown in Fig. 6, the spline shaft 33
A seventh timing pulley 115 is attached to the end opposite to the cutting machine. Support member 116 arranged below the spline shaft 33
A camshaft 117 is rotatably supported on the camshaft 117, and a seventh timing pulley 11 is connected to the camshaft 117.
An eighth timing pulley 118 having the same diameter as 5 is attached. A fourth timing belt 119 is stretched around the seventh timing pulley 115 and the eighth timing pulley 118, and the crankshaft 13 of the cutting machine rotates once (performs one cutting operation), and the spline shaft 3
The camshaft 117 rotates once during each rotation of the camshaft 3.

The cam shaft 117 has a feed screw shaft drive cam 12.
0 is attached to the cam groove 1 of this cam 120.
A cam follower 122 attached to the feed screw shaft drive lever 121 is fitted into 20a.

The feed screw shaft drive lever 121 has an L-shaped lower end and a bifurcated upper end, and the cam follower 122 is attached to the lower end of the L-shape.
The middle part of the position adjustment mechanism 1 is attached to a mounting plate 125 fixed to the rail frame 38.
26 rotation support shafts 127.

The position adjustment mechanism 126 includes a position adjustment plate 129 having a long hole 128 extending in the vertical direction, and a position adjustment plate 129 that is screwed into the mounting plate 125 through the long hole of the position adjustment plate 129 to fix the position adjustment plate 129 to the mounting plate 125. Fixing bolt 13
0, nuts 131 and 132 fixed to the mounting plate 125 and the rail frame 38, respectively.
The position adjustment bolts 133 and 1 are screwed together and abutted on the upper and lower ends of the position adjustment plate 129.
34, and a rotation support shaft 127 is rotatably supported in the center of the position adjustment plate 129. In this position adjustment mechanism, the fixing bolt 130 is loosened and the upper and lower position adjustment bolts 1
33 and 134, the vertical position of the position adjustment plate 129 can be adjusted. After determining the position of the position adjustment plate 129, tightening the fixing bolt 130 fixes the position adjustment plate 129 in a predetermined position. It is becoming possible to do so.

A long hole 121a is provided in the middle part of the feed screw shaft drive lever 121.
The bolt 135 screwed into the rotation support shaft 127 through the bolt 135 allows the feed screw shaft drive lever 12
1 is fixed to a rotation support shaft 127.

As shown in FIG. 7, a portion of the feed screw shaft 31 near the end opposite to the cutting machine 10 is supported by a bearing 139, and a ratchet mechanism is attached to the portion of the feed screw shaft 31 near the end. The inner ring 140 of is fixed. Inner ring 140
An outer ring 141 is arranged concentrically with the inner ring 14.
0 and the outer ring 141 are mechanically coupled via a ratchet wheel and a ratchet pawl. In this example, when the outer ring 141 is rotated in the direction of the arrow shown in FIG.
0 and the outer ring 141 are mechanically connected so that the two wheels rotate together, and when the outer ring 141 is rotated in the direction opposite to the illustrated arrow, the outer ring 141 spins idly.

A drive pin 142 is attached to the outer ring 141, and this drive pin 142 is fitted between the bifurcated portions of the feed screw shaft drive lever 121.

The spline shaft 33 rotates and the cam shaft 117
When the cam 120 rotates, the cam 120 rotates, causing the drive lever 121 to reciprocate within a certain angle range. When the drive lever 121 rotates counterclockwise in FIG. 6, the outer ring 141 rotates counterclockwise by a certain angle, and the inner ring 140 rotates by a certain angle together with the feed screw shaft 31. Next, when the drive lever 121 rotates clockwise, the outer ring 141 idles, so the inner ring 1
40 does not rotate. Therefore, the feed screw shaft 31
When the cutting machine 10 performs one cutting operation and the spline shaft 33 rotates once, the spline shaft 33 rotates intermittently in one direction by a certain angle, and as the feed screw shaft 31 rotates in one direction, the second The slider 65 is sent together with the second clamp 67 by a fixed distance in the conveyance direction (X2 direction) of the steel plate.

(e-3) Mechanism for returning the feed screw shaft to its original position As shown in FIG.
45 is installed. This drive gear is rotatably supported on the feed screw shaft 31,
An electromagnetic clutch 146 is installed between the drive gear 145 and the ratchet mechanism to mechanically connect or disconnect the feed screw shaft 31 and the drive gear 145. The end of the feed screw shaft 31 on the opposite side from the cutting machine is the frame 1.
A return motor 150 is attached to a portion of the frame 148 below the bearing 149. The output shaft 151 of the home position return motor 150 protrudes toward the cutting machine side.
A pinion gear 152 attached to the drive gear 145 is engaged with the drive gear 145.

Therefore, when the electromagnetic clutch 146 is energized and the home position return motor 150 is rotated with the drive gear 145 and the feed screw shaft 31 coupled, the feed screw shaft 31 is rotated by the feed screw shaft drive cam 120. The second slider 65 and the second clamp 67 are returned to their original positions on the cutting machine side. At this time, the inner ring 1 of the ratchet mechanism
40 idles around the outer ring 141. Note that when rotating the feed screw shaft 31 with the drive lever 121 to move the second slider 65 by a predetermined distance in the conveying direction of the steel plate, the electromagnetic clutch 146 is deenergized and the drive gear 145 and the feed screw shaft 31 are rotated. Separate the bonds.

(f) Steel plate laminate transport mechanism As shown in Fig. 1, the fixed table 20 has a plurality of traverse grooves 160 (three in this example) extending in a direction perpendicular to the direction of transport of the steel plate. are provided at predetermined intervals in the direction,
A traverse cylinder 16 is installed in each traverse groove.
A traverse pin 16 attached to a traverse member 162 driven by a traverse member 162 (see FIG. 2)
3 are slidably fitted together, and this traverse pin is driven by the cylinder 161 and moves along the groove 160 toward the take-out table 25 when the lamination work of each steel plate laminate is completed. Each traverse pin 163 is in an upright state when moving from the feed screw shaft 31 side to the carry-out table 25 side, and each traverse pin 163 comes into contact with the laminated surface of the steel plate laminate and moves the laminate to the carry-out table 25. It is designed to be carried out to the side. Further, each traverse pin is designed so that it does not tip over and protrude from the groove 160 when returning from the carry-out table 25 side to its original position on the feed screw shaft 31 side.

A workpiece conveyance motor 1 drives a workpiece conveyance screw shaft 35 supported on the side of the carryout table 25.
65 is provided, and a timing pulley attached to the output shaft of this motor and a timing pulley attached to the end of the screw shaft 35 are coupled via a timing belt 167. A nut provided on a slider (not shown) is screwed onto the screw shaft 35, and a workpiece transfer clamp 169 is attached to this slider. The workpiece transfer clamp 169 consists of an upper arm and a lower arm whose rear ends are pivotally supported, and both arms are driven by a drive mechanism (not shown) so that their respective tips move toward or away from each other. . The carry-out table 25 is provided with a groove 170 extending in its length direction, and the upper and lower arms of the workpiece carry-out clamp 169 have tip fittings 171 provided at their respective tips.
are provided so as to face each other vertically with the groove of the carry-out table 25 in between. When both arms are driven close to each other, the clamp end fitting attached to the end of the lower arm becomes groove 17.
0 and move upward through unloading table 2.
5. Clamp the steel plate laminate on top. In this state, the motor 165 is driven to rotate the screw shaft 35, and the clamp 169 moves to the opposite side of the cutting machine while clamping the steel plate laminate, and transports the steel plate laminate to the next process (core winding process). do.

In order to guide the steel plate A cut by the cutting machine to the moving table 21 side, as shown in FIG. 2, the cutting blade 12 of the cutting machine 10 and the moving table 2
A guide table 175 is disposed between the two. The end of the guide table 175 on the movable table 80 side is slightly higher than the top surface of the movable table 21 to ensure that the cut steel plate A rides on the steel plate already on the movable table 21. There is.

() Description of the operation of the embodiment In the above embodiment, the crankshaft 13 rotates continuously while the steel plates are being stacked, and once stops when the stacking of a predetermined number of steel plates is completed. In this embodiment, a steel plate conveyance mechanism (not shown), first and second clamps, a moving table drive mechanism, and a feed screw shaft drive mechanism are used as shown in FIG. The cam grooves of the first and second cams 59 and 81, the cam groove of the feed cam 94, and the cam groove of the feed screw shaft drive cam 120 are predetermined so as to operate in conjunction with the operation of the cutting device (not shown) and the cutting device. It is formed in the shape of. In the following explanation, all angles indicating positions where each operation is performed indicate rotational angular positions of the crankshaft.

That is, in this embodiment, when feeding the first steel plate, the belt-shaped steel plate conveying mechanism starts feeding the steel plate from the 0 degree position and stops feeding at the 135 degree position. Furthermore, the feeding of the second and subsequent steel plates is started from the 225 degree rotational position of the crankshaft and stopped at the 135 degree rotational position.

The first cam 59 starts a clamping operation of the first clamp at a rotational position of 155 degrees, completes the clamping operation at a position of 172 degrees, and starts a releasing operation of the first clamp at a position of 208 degrees. Complete the release of the clamp at the position shown below.

The feed cam 94 starts feeding the movable table toward the fixed table from the 180 degree position, completes the feed at the 197 degree position, and starts moving the movable table backward from the 228 degree position until it reaches the 295 degree position. At this point, the moving table is returned to its origin.

The second cam 81 starts the clamping operation of the second clamp at the 135 degree position, completes the clamping operation at the 152 degree position, and starts releasing the second clamp at the 197 degree position. The clamp release operation is completed at the 215 degree position.

The feed screw shaft drive cam 120 starts the rotation of the feed screw shaft from the 148 degree position to start feeding the second clamp, and stops the rotation of the feed screw shaft at the 197 degree position to start the second clamp. Complete clamp feeding.

When starting the lamination of steel plates, as shown in FIG.
1, the steel plate to be cut is transported from the transport table 17 side toward the cutting machine 10 with the first clamp in the released position,
This steel plate stops when its tip reaches a position immediately in front of the second clamp 67. In this case, the cutting dimension of the steel plate is set to a length corresponding to the circumference of each winding layer of the wound core for each steel plate to be laminated by a length measuring mechanism (not shown), and the second clamp 67 is displaced by the feed screw shaft 31,
Each time each cutting operation is completed, the second clamp 67 is positioned so as to be separated from the cutting position by the cutting blades 11 and 12 by a predetermined distance (approximately equal to the length of the steel plate to be cut). The crankshaft 13 of the cutting machine 10 is driven in connection with this conveyance operation of the steel plate, and in synchronization with the rotation of the crankshaft 13, the clamp drive shaft 102, cam drive shaft 93, spline shaft 33, and camshaft 11 are rotationally driven. be done. At this time, the electromagnetic clutch 146 of the feed screw shaft 31 is disconnected, and the feed screw shaft 31 is driven by the feed screw shaft drive cam 120 shown in FIG.

As the spline shaft 33 rotates, the first cam 5
9 rotates, thereby driving the clamp arm 42 of the first clamp 41, and the end fitting 4 of the first clamp 41 is driven.
8, 48 is the moving table 21 as shown in FIG.
It is pressed against the upper steel plate A (the first clamp 41 is located at the clamp position). The clamping force is adjusted by the spring 53 as the lamination work of steel plates progresses and the thickness of the laminated body increases, and the clamping force becomes stronger as the number of laminated sheets increases.

After the clamping operation of the steel plate by the first clamp is completed, the clamp shaft 13 reaches the cutting operation start position, and is lowered to the movable cutting blade 12 to cut the steel plate. In this way, in the present invention, since the first clamp clamps the steel plate when cutting the steel plate, it is possible to prevent the steel plate from moving during cutting, and it is possible to always accurately cut dimensions. I can do it.

After the steel plate cutting operation is completed, the clamp shaft 13
The first clamp feed cam 9 rotates in synchronization with the
The cam groove 94a is provided so that the cam groove 94a of No. 4 displaces the cam follower 92 to the right in FIG. 5 and rotates the feed lever 91 counterclockwise. Therefore, when the cutting operation of the steel plate is completed, the first slider 37 moves a certain distance due to the biasing force of the spring 95, and as a result, the moving table 21 moves to the fixed table while holding the steel plate A clamped by the first clamp. Move a certain distance to the 21 side. This moving distance is set equal to the shift dimension d of the step formed at the end of the steel plate laminate.

When the movable body 21 moves a certain distance toward the fixed table 20, the second cam 81 drives the second clamp 67 from the release position to the clamp position, and the light of the steel plate A conveyed onto the fixed table 20 is removed. The ends are clamped against a fixed table 20. In this case as well, the cylinder 72 is driven to ensure clamping of the steel plate A and to keep the clamping force substantially constant. Subsequently, the rod of the cylinder 54 is driven to the advancing side, and the first cam 59 further drives the first clamp 41 to the release position. followed by 2
In order to cut the first steel plate, a strip steel plate is carried in through the cutting blades 11 and 12 of the cutting machine, and the carried steel plate is stacked on the already cut first steel plate on the moving table 21. . After the conveyance of the steel plate is completed, the crankshaft 13 is driven again, and the same operation as described above is performed to cut the steel plate.

Thereafter, similar operations are repeated to stack a predetermined number of strip-shaped steel plates A, thereby forming a steel plate stack B having steps at the stacked ends as shown by the chain lines in FIG. Since the circumferential length of each winding layer of the wound core gradually increases toward the outer circumferential side, the length of the steel plate A constituting the steel plate laminate B gradually increases. In order to cope with the change in the length of the steel plate A, in this embodiment, the feed screw shaft 31 moves the second clamp 67 a certain distance in the conveying direction of the steel plate for each cutting operation periodically with the rotation of the crankshaft 13. I'm trying to move it to .

When the stacking of a predetermined number of steel plates is completed, the cylinders 54 and 72 operate to quickly release the first and second clamps, and then the traverse cylinder 161 moves the standing traverse pin 163 along the traverse groove 160. and move it to the unloading table 25 side. The traverse pin 163 comes into contact with the side surface of the steel plate laminate B and transports the laminate to the unloading table 2.
5 side, and after positioning the stacked body B on the carry-out table 20, it returns to its original position.

When the steel plate stack B is carried out onto the carry-out table 25, the workpiece transport clamps 169 clamp the stack from above and below, and then the workpiece transport screw shaft 3
5 is driven, and the workpiece conveying clamp 169 that clamps the steel plate stack B is conveyed toward the exit side of the unloading table 25 (the right end in FIG. 1). Although not shown, a core winding machine is arranged on the exit side of the carry-out table 169, and the transported steel plate laminate is carried into this winding machine.

While the steel plate stack is being conveyed to the winding machine as described above, the electromagnetic clutch 146 is engaged and the home position return motor 150 is driven. As a result, the feed screw shaft 31 is driven, and the second slider 65, second clamp 67, and second cam 81 are driven.
is returned to its original position in preparation for cutting the first steel plate of the next steel plate stack.

In the above embodiment, each element is operated in synchronization with the operation of the cutting machine by connecting the drive shafts of the cams that respectively drive the first and second clamps and the moving table through a timing pulley and a timing belt. A synchronous drive mechanism is configured in which each mechanism is driven by an individual drive source, and each element is driven synchronously in a predetermined order by sequentially controlling the drive sources that drive each element. You may.

[Effects of the Invention] As described above, according to the present invention, the steel plate is cut while being fixed to the movable table by the first clamp, and the cut steel plate is moved to the fixed table side together with the movable table. Next, the second slump is placed in a clamped state, the steel plate is fixed to the fixing table, and the first clamp is released. It is possible to automatically carry out a stepped stacking operation by shifting the positions of the parts, and it is possible to automatically carry out a stepped stacking process of steel plates following the step of cutting the steel plates. Furthermore, while the cutting machine cuts the steel plate and while the moving table moves the steel plate a predetermined distance toward the fixed table, the first clamp clamps the steel plate against the moving table, so that the steel plate can be cut accurately. In addition, the cut steel plates can be moved to the fixed table side without causing positional deviation, so there is an advantage that it is possible to obtain a laminated steel plate pair with a uniform displacement dimension of the steel plates at the stepped end. .

[Brief explanation of drawings]

Figures 1 to 7 show one embodiment of the present invention, with Figure 1 being a plan view showing the overall configuration, and Figure 2 being a plan view showing the overall configuration.
The figure is a sectional view taken along the - line in Fig. 1, Fig. 3 is an enlarged plan view of the main part, Fig. 4 is a sectional view taken along the - line in Figs. 1 and 3, and Fig. 5 is a - line sectional view in Fig. 1. from 1st
FIG. 6 is an enlarged rear view of the main parts of the second clamp and the first clamp drive mechanism, and FIG.
FIG. 7 is an enlarged side view of the main parts of the feed mechanism of the second clamp viewed from the line direction; FIG. FIG. Figures 8 to 11 show the process of manufacturing a wound core using a stepped steel plate laminate. Figure 8 is a front view showing the stepped end of the steel plate laminate, and Figure 9 is a stepped end view. Fig. 10 is a front view showing a steel plate wound body manufactured by winding the steel plate laminated body, and Fig. 11 is an explanatory diagram illustrating the process of rolling up the steel plate laminated body with the attached steel plate. Front view showing the obtained wound core, No. 12
The figure is an explanatory diagram illustrating the operation of a cam used in an embodiment of the present invention. 10... Cutting machine, 13... Clamp shaft that drives the cutting blade, 14... Coupling, 15... Reduction gear, 16... Cutting machine drive motor, 20... Fixed table, 21... Moving table, 23 ... Guide rail, 25 ... Workpiece unloading table, 27
...First mount, 29...Second mount, 31...
Feed screw shaft, 33... Spline shaft, 35... Transport screw shaft, 37... First slider, 38... Rail mount, 39... Guide rail, 41... First
Clamp, 42... Clamp arm, 45...
Clamp head, 48...Clamp end fitting, 5
4...Air cylinder, 57...Cam follower, 5
9...First cam, 61...Hub, 63...Roller, 65...Second slider, 65a...Nut, 67...Second clamp, 69...Clamp arm, 71...Tip metal fitting , 72...Air cylinder, 81...Second cam, 84...Roller, 85
...Hub, 87...Feed rate adjustment arm, 89...
Drive bolt, 91...Feed lever, 92...Cam follower, 93...Drive shaft, 94...Feed cam, 95...Spring, 101...First timing pulley, 102...Clamp drive shaft, 103... …
Second timing pulley, 105...Spline drive shaft, 106...Third timing pulley, 1
07... Fourth timing pulley, 108... Fifth timing pulley, 109... Sixth timing pulley, 110... First timing belt, 111... Second timing belt, 112
...Third timing belt, 115...Seventh timing pulley, 117...Camshaft, 118...
...Eighth timing pulley, 119...Fourth timing belt, 120...Screw shaft drive cam, 1
21...Feed screw shaft drive lever, 122...Cam follower, 126...Position adjustment mechanism, 129...
Position adjustment plate, 130...Fixing bolt, 133,1
34...Position adjustment bolt, 140...Inner ring of ratchet mechanism, 141...Outer ring of ratchet mechanism,
145... Drive gear, 146... Electromagnetic clutch,
150...Original position return motor.

Claims (1)

[Claims] 1. Stepped steel plates are formed by stacking a plurality of strip-shaped steel plates of different lengths, which are obtained by cutting a strip-shaped steel plate with a cutting machine, while sequentially shifting the end position of each in the longitudinal direction. In the stepped stacking apparatus for steel plates for an iron core, which forms a steel plate laminate having an end portion, a fixed table is arranged in front of the cutting machine with a gap between the cutting machine and the cutting machine; and the cutting machine and the fixed table. and a clamp position for clamping the steel plate conveyed onto the movable table through between the cutting blades to the movable table. a first clamp that is provided to be displaced between a release position and a release position where the clamp is released and is driven by a first clamp drive mechanism; and a clamp that is clamped by the first clamp and cut by the cutting machine. a moving table drive mechanism that moves the moving table by a predetermined amount toward the fixed table in order to convey the steel plate to the fixed table, and returns the moving table to its original position; and the first clamp. The steel plate is provided so as to be displaced between a clamp position where the steel plate clamped by the movable table drive mechanism and conveyed to the fixed table side is clamped to the fixed table and a release position where the clamp is released. 2
a second clamp driven by a clamp drive mechanism; and a second clamp driven by a clamp drive mechanism; while the cutting machine performs the cutting operation and the movable table drive mechanism moves the movable table a predetermined distance toward the fixed table, the first clamp and the second clamp the first clamp and the second clamp when the movable table drive mechanism moves the movable table a predetermined distance toward the fixed table.
a synchronized drive mechanism that drives the first and second clamp drive mechanisms and the movable table drive mechanism in synchronization with the cutting machine so as to repeatedly position the clamps in the release position and the clamp position, respectively; A stepped lamination device for steel plates for iron cores, which is characterized by the following: