| US 7,571,630 B2 | ||
| Spring manufacturing apparatus | ||
| Ichiro Itaya, Tokyo (Japan) | ||
| Assigned to Kabushiki Kaisha Itaya Seisaku Sho, Tokyo (Japan) | ||
| Filed on Jan. 08, 2009, as Appl. No. 12/350,508. | ||
| Application 12/350508 is a continuation of application No. 11/724947, filed on Mar. 16, 2007, granted, now 7,496,998. | ||
| Claims priority of application No. 2006-106588 (JP), filed on Apr. 07, 2006. | ||
| Prior Publication US 2009/0120153 A1, May 14, 2009 | ||
| Int. Cl. B21F 3/02 (2006.01) | ||
| U.S. Cl. 72—140 [72/145; 72/449; 29/33 F; 29/896.9] | 4 Claims |
| 1. A spring manufacturing apparatus for manufacturing a spring by executing bending processing with a tool on wire which is
sent to a spring forming space on a forming table, comprising:
a plurality of tool supporting units arranged in a radial pattern from the spring forming space on the forming table each
of which supports a tool configured to support tools in a way that the tools can be slid toward the spring forming space from
at least three directions; and
a plurality of driving force transmission units, attached to each of said tool supporting units on the forming table, each
of said driving force transmission units configured to transmit a driving force to each of said tool supporting units for
the sliding tool,
wherein each of said tool supporting units includes first and second tool supporting units configured to drive a tool by different
driving methods,
each of said driving force transmission units has a common driving axis that can selectively be attached to the first and
second tool supporting units and that is supported on the forming table in a way that each of the driving axis is protruded
from one side surface of the forming table on the spring forming space side, and each of said driving force transmission units
has a motor configured to rotate the driving axis arranged on the other side surface of the forming table opposite from the
spring forming space,
said first tool supporting unit comprises a first driving mechanism that transmits driving force of the driving axis to the
tool by a rack and pinion, and
said second tool supporting unit comprises a second driving mechanism that transmits driving force of the driving axis to
the tool by a crank.
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