JPS60196227A - Bending device - Google Patents

Abstract

PURPOSE:To perform exactly and smoothly change and connection in the case of bending alternately to a U shape and an inverted U shape by providing a slide table engaging with an upsetting table on the upsetting table, erecting a pair of bending shafts thereon and displacing alternately said bending shafts around the rotating center of the upsetting table. CONSTITUTION:A slide table 37 which is slidable in the direction perpendicular to a material supply direction (s) and has a leg part 38 engaging with an upsetting table 14 in the rotating direction is disposed on the table 14 along the guide rail 39 on the table 14. A pair of bending shafts 15, 15a are erected in the sliding direction in the central part of the table 37 and the table 37 is moved back and forth in the sliding direction via rollers 41A, 41B by air cylinders 43A, 43B to displace alternately a pair of the above-mentioned bending shafts 15, 15a around the revolving shaft 2 of the table 14. The opereating characteristic in the stage of changing the bending direction is improved and the construction is simplified by the above-mentioned constitution.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention involves continuously bending a strip or rod-shaped material coiled around a drum into a U-shape and an inverted U-shape in one cycle. This invention relates to improvement of a bending device.

[Technical background of the invention and its problems]

A belt-shaped or rod-shaped material wound around a drum is
A bending mechanism that continuously bends the shape of a letter and an inverted U-shape in one cycle has been proposed in Japanese Patent Application No. 114434/1982.

As shown in FIGS. 1 to 10, this bending mechanism includes a tension mechanism 11 for sequentially feeding out the material 1 wound up into a coil, a feeding mechanism section J2, and a guide mechanism section 1.
3, a reversing table 14 for bending the fed material 1 into a U-shape, and a bending shaft 15° 15a,
Curved axis 15. There is a gap between 15a that is large enough to allow the material 1 to be inserted. The curved axis 15°152 is the material supply direction and m
They move in the angular direction and are alternately connected to the rotating shaft 2 of the reversing table 14.

That is, as shown in FIG. 1, when the feed mechanism 12 operates, the material 1 is fed between the curved shafts 15+15a on the reversing table 14, and when a certain length is reached, the feed mechanism 12 is stopped as detected by the limit switch 16. In this state, curved axis 1
5a is connected to the rotating shaft 2. Subsequently, as shown in FIG. 2, the reversing table 14 rotates clockwise around the curved shaft 15a, and as a result, the curved shaft 15 rotates around the curved shaft 15a.
The material 1 is bent into a U-shape along the outer shape of the curved axis 15a by moving around it as shown by the arrow. When the reversing table 14 rotates approximately 180 degrees, it is reversed and returns to the bending start position shown in FIG. 1, resulting in the state shown in FIG. 3.

Further, as shown in FIG. 4, the feed mechanism 12 is operated and the material 1 is fed out until a certain length is reached.The feed mechanism 12 is similarly stopped by the detection of the limit switch 16, and at the same time the air cylinder 18 is operated and the curved shaft 15, 158 is moved in a direction perpendicular to the material feeding direction, and the connection is switched so that the rotary shaft 2 and the curved shaft 15 are connected as shown in FIG.

Subsequently, as shown in FIG.
The material 1 is rotated in the counterclockwise direction as shown in the figure, and the bending shaft 15a moves as shown by the arrow to bend the material 1 into an inverted U shape. When the reversing table 14 rotates 180 degrees, it is reversed and returns to the position shown in FIG.

After one cycle of bending the U-shape and the inverted U-shape is completed in this way, the air cylinder 18 switches and connects the square bending shaft 15a and the rotating shaft 2 as shown in FIG. Then, the process shown in FIGS. 1 to 6 is performed to perform the second cycle of bending. Note that FIG. 9 shows a state in which bending has been completed for 2.5 cycles, and FIG. 10 shows a state in which bending has been completed for 4 cycles.

17. 17a, 20, 20a are limit switches that respectively control the rotation angle of the reversing table 14; 19, 19a;
is a limit switch that controls the moving distance of the curved axis 15° 15a.

In this way, the above-mentioned bending mechanism can continuously bend the material 1 into a U-shape and an inverted U-shape by using the reversing table 14 and the pair of bending shafts 15, 15a which are alternately connected to the rotating shaft 2 of the reversing table 14. can.

However, in this mechanism, in order to continuously bend the material 1 as described above, a pair of curved shafts 15. 15
8 must be alternately connected to the rotating shaft 2 of the reversing table 14, but the conventional structure is complicated and it is difficult to operate smoothly and with high precision. Therefore, there has been a demand for improvement.

[Purpose of the invention]

The invention has been made in view of the above points, and has a structure that allows accurate and smooth switching and connection of a pair of curved shafts with a rotating shaft of a reversing table for bending a material alternately into a U-shape and an inverted U-shape. The purpose is to provide a simple bending device.

[Summary of the invention]

The present invention alternately connects a pair of curved shafts provided on a reversing table to a rotating shaft of the reversing table to alternately bend the material supplied between the pair of curved shafts into a U-shape and an inverted U-shape. In the bending device, a slide table is provided on the reversing table so as to be slidable in the material supply direction and the surface angle direction, and is engaged with the table in the rotation direction, and the pair of bending shafts are erected on the slide table. The slide table is reciprocated in the sliding direction to alternately shift the pair of curved shafts to the rotation center of the reversing table, thereby switchingly connecting the pair of curved shafts to the rotating shaft of the reversing table. The feature is that the same operation can be obtained as when

[Embodiments of the invention]

An embodiment of the bending device of the present invention is shown in FIGS. 11 to 13. Reference numeral 14 denotes a reversing table, which has a rotating shaft 2 extending vertically downward at the center, is rotatably supported by bearings 33 and 34 provided in the bearing portion 32 of the pedestal 31, and the rotating shaft 2 is connected to a gear motor via a joint 35. It is connected to 36. 37 is a slide table installed on the reversing table 14. The slide table 37 is guided by a guide rail 39 on the reversing table 14 via legs 38 formed on the lower surface, and is supported on the reversing table 14 so as to be slidable in a direction perpendicular to the material supply direction (arrow S). Further, the guide rails 39 are engaged with each other in the rotating direction of the reversing table 14 so that the rotational force of the reversing table 14 is transmitted to the slide table 37. Curved axis 15. 15a is provided parallel to the center of the slide table 37 in the sliding direction (arrow A or B) with a predetermined gap G therebetween, and is designed to prevent the 90 dimension from being deviated by a cap 40 inserted at the end thereof. .

In the space 1111G, material 1 (first
(see figure) is inserted. 41A and 41B have their centers located on the diameter line in the same direction as the sliding direction (arrows A and B) of the slide table 37, and are arranged on the left and right sides of the slide table 37, and are fixed to the legs via supports 42, respectively. roller,
43A and 43B are air cylinders arranged corresponding to the rollers 41A and 41B and fixed on the pedestal 31 through supporting members, respectively; 45A is an air cylinder that rotates the curved shaft 15a when the slide table 37 moves in the direction of arrow A; rotation axis 2
A positioning device 45B positions the center of the other curved axis 1 when the slide table 37 moves in the direction of arrow B.
5 at the center of the rotating shaft 2 of the reversing table 14.

The positioning devices 45A and 45B each have a protrusion 48 that receives the spring pressure of a spring 47 in a holder 46, and are fixed on the reversing table 14 via a support 49, so that the slide table 37 is moved in the direction of the arrow or B. When they move to the respective predetermined positions, the corresponding movement &5 is made on this table side.
The protrusion 48 enters into the ■-shape 851 of 0A or 50B and stops the slide table 37.

That is, as shown in FIG. 13, the slide table 37 is driven via the roller 41A by the operation of the air cylinder 43A and slides in the direction of the arrow, and when the curved shaft 15a reaches the same axis as the rotating shaft 2 of the reversing table 14, the positioning device is activated. 45A works and stops at that position, and in that state, the reversing table 14 rotates clockwise in the figure, and the rotating movement of the slide table 37 interlocking with this rotates the curved shaft 15.
moves around the other curved axis 15a and bends the material 1 (see FIG. 1) into a U-shape. Further, as shown in FIG. 14, the slide table 37 is driven via the row 241B by the operation of the air cylinder 43B and slides in the direction of arrow B.
5 reaches the same axis as the rotating shaft 2 of the reversing table 14, the positioning device 45B operates and stops at that position, and in this state, the reversing table 14 rotates counterclockwise in the figure, thereby interlocking the slide table 37. The curved shaft 15a moves around the curved shaft 15 due to the rotational movement of the material 1.
is bent into an inverted U shape.

Note that the above operation describes a part of the continuous folding process of this device, and illustrations and explanations are omitted, but this device sequentially feeds the feed 1 as shown in FIGS. 1 to 10. A tension mechanism 11, a feeding mechanism 12, a guide section 13, a limit switch 16 that controls the feeding dimension, and a limit switch 17 that controls the rotation angle of the reversing table 14 when bending the material into a U-shape and an inverted U-shape.
, 17a, 19, 19a.

20.20a, and can continuously bend the supplied material 1 into a U-shape and an inverted U-shape as a cycle by being controlled by their linked operation, Its operation is.

The operation steps are exactly the same as those shown in FIGS. 1 to 10.

〔Effect of the invention〕

As described above, according to the present invention, the pair of curved shafts provided on the reversing table are alternately connected to the rotating shaft of this table, so that the material supplied between the curved shafts is alternately arranged in a U-shape and an inverted U-shape. In a bending device for bending, a slide table is provided on an inversion table so as to be slidable in the direction of material supply and at an angle, and is engaged with the inversion table in the direction of rotation of the inversion table. is set upright, and the slide table is reciprocated in the sliding direction to alternately shift the pair of curved shafts to the rotation center of the reversing table, thereby switchingly connecting the pair of curved shafts to the rotating shaft of the reversing table. The same operation as in the previous case can be obtained, and the operability when switching the bending direction is much improved, and continuous bending operations can be performed smoothly and to a high degree. Furthermore, the structure can be simplified and reliability can be significantly improved.

[Brief explanation of the drawing]

1 to 10 are explanatory diagrams of the operation of a conventional continuous folding device, FIG. 11 is a front view showing an embodiment of the continuous folding device according to the present invention, and FIG. 12 is a line 1-I in FIG. 11. Arrow view, 1st
3 and 14 are plan views showing the operating state of the device. 2.Rotating axis, 14-reversing table, 15.15a curved axis, 37-sliding table. Agent Patent Attorney Inoue - Male

Claims (1)

[Claims] A folding device that alternately bends material supplied between the pair of curved shafts into a U-shape and an inverted U-shape by alternately switching and connecting a pair of curved shafts provided on an inversion table to a rotating shaft of the table, Generally, a slide table is provided on the reversing table so as to be slidable in a direction perpendicular to the supply direction of the material and is engaged with the reversing table in the rotational direction of the reversing table, and the pair of curved shafts are erected on the slide table; A bending device characterized in that the slide table is moved in a sliding direction so that the pair of curved axes are alternately displaced to the center of rotation of the reversing table.