Sewing device having a detachably mounted looper block for bobbin changing
AssigneeMoll Automatische Naehsystems GmbH i.g.
InventorsPhilipp Moll, Norbert Laschet
Life of this patent
Estimating the term…
Abstract
A sewing device (13) consists of a basic unit (13) comprising the main motor, the needle bar (27), and the take-up lever (31), and a shuttle block (24) detachably mounted thereto which comprises the shuttle (35) with the thread bobbin (36) for the lower thread. For changing an empty thread bobbin, the sewing machine mounted to a robot arm is inserted into a reception unit (21) in which the shuttle block (24) remains, whereas the basic unit (23) is moved to another shuttle block with full thread bobbin (36a) and receives it. The sewing machine does not require a time-consuming manual change of the thread bobbin for the lower thread.
Claims15
A sewing device comprising a sewing machine (13), said sewing machine including a movable needle bar (27) driven by a main motor as well as a looper (35) with a thread bobbin (36) driven synchronously with said needle bar (27), said sewing machine (13) including a basic unit (23) which includes said main motor and said needle bar (27), said basic unit (23) including a looper block (24) detachably mounted to said basic unit (23) and carrying said looper (35), said basic unit (23) and said looper block (24) being interconnected by coupling means (38, 38a) constructed and arranged for establishing a drive for said looper (35), a change station (20) including at least one reception unit (21 or 22) for taking over and retaining said looper block (24) detached from said basic unit (23), and said at least one reception unit (21 or 22) includes a retention device (46) for retaining a shaft (37) of said looper block (24).
A sewing device comprising a sewing machine (13), said sewing machine (13) including a basic unit (23) having main motor means for imparting movement to a movable needle bar (27), a looper (35) rotatably carried by an interchangeable looper block (24), means (38) for effecting a synchronous detachable mounting between said looper block (24) and said basic unit (23), said synchronous detachable mounting means (38) including first (40) and second (41) drive means controlled by said main motor means for imparting synchronous rotation through said first drive means (40) to synchronously rotate said looper (35), said first (40) and second (41) drive means are each a gear which intermesh automatically with each other upon mounting being effected between said looper block (24) and said basic unit (23), another looper (35) rotatably carried by another interchangeable looper block (24), first and second holding means (21, 22) for selectively holding one of said looper blocks while another of said looper blocks is carried by said basic unit (23), and means (46) for selectively detachably securing said looper block (24) to said first and second holding means (21, 22).
A sewing device comprising a lock stitch sewing machine (13), said lock stitch sewing machine (13) including a basic unit (23) having main motor means for imparting movement to a movable needle bar (27), a looper (35) including a spool with a thread supply rotatably carried by an interchangeable looper block (24), means (38a) for effecting a synchronous releasable mounting between said looper block (24) and said basic unit (23), said synchronous releasable mounting means (38a) including control means (54) and drive means (53) controlled by said main motor means for imparting synchronous rotation through said drive means (53) to synchronously rotate said looper (35), said drive means (53) is a drive motor which is driven in synchronism with the main motor means upon mounting being effected between said looper block (24) and said basic unit (23), another looper (35) rotatably carried by another interchangeable looper block (24), first and second holding means (21, 22) for selectively holding one of said looper blocks while another of said looper blocks is carried by said basic unit (23), and means (46) for selectively detachably securing said looper block (24) to said first and second holding means (21, 22).
A sewing device comprising a sewing machine (13), said sewing machine (13) including a basic unit (23) having means for imparting movement to a movable needle bar (27), first and second substantially identical interchangeable looper blocks (24) carrying a first thread bobbin (36) and a second thread bobbin (36a), respectively;
- means (38, 38a) for detachably mounting and dismounting said first and second interchangeable looper blocks (24) relative to said basic unit (23), said first interchangeable looper block (24) and its first thread bobbin (36) being coupled by said mounting and dismounting means (38) to said basic unit (23) during at least one phase of operation of the sewing device, first holding means (22) for holding said second interchangeable looper block (24) and its second thread bobbin (36a) in readiness during said one operation phase preparatory to being substituted for said first interchangeable looper block (24) and its first thread bobbin (36), and second holding means (21) for holding said first interchangeable looper block (24) and its first thread bobbin (36) upon the dismounting of said first interchangeable looper block (24) from said basic unit (23) by said mounting and dismounting means (38) during a second phase of operation of the sewing device.
The sewing device as defined in claim 19 including means (14) for moving said sewing machine (13) relative to said first (22) and second (21) holding means.
Dependencies are inferred from the claim text.