Sewing – Special machines – Pattern controlled or programmed
Reexamination Certificate
2000-04-03
2001-01-09
Nerbun, Peter (Department: 3741)
Sewing
Special machines
Pattern controlled or programmed
C112S180000, C112S186000, C242S473500
Reexamination Certificate
active
06170417
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a remote control bobbin case exchanger device well-suited for a sewing machine in which a rotary bobbin is placed inaccessibly, and particularly concerns a remote control bobbin case exchanger device better-suited for an industrial sewing machine in which a plurality of embroideries are wrought out concurrently.
DESCRIPTION OF PRIOR ART
In a sewing machine in which a bobbin case is provided within a rotary bobbin so as to supply an under thread, an amount of the under thread wound to the bobbin is very small compared to that of an upper thread. This necessitates to frequently set and remove bobbin cases so as to replace the bobbins.
Take for example an industrial sewing machine. In such a machine it is often difficult to access where a rotary bobbin is placed. This makes it cumbersome and time-consuming to exchange the bobbin cases. This becomes one of the factors to reduce efficiency with a deteriorated workability particularly in the industrial sewing machine in which the bobbin cases are to be frequently exchanged.
This is all the more true especially in an industrial embroidery sewing machine in which a plurality of embroideries are concurrently wrought out necessitating the exchange of a significant number of the bobbin cases (e.g., 6~15) at the same time. When the rotary bobbin is placed inaccessibly, it takes a long time to exchange the bobbin cases, thereby substantially reducing a sewing workability upon replacing the bobbin cases.
Therefore, the present invention was made with the above drawbacks in mind. It is a main object of the invention to provide a remote control bobbin case exchanger device which is capable of readily exchanging bobbin cases under the circumstances in which a rotary bobbin is placed inaccessibly.
DISCLOSURE OF THE INVENTION
The present invention adopts the following means.
[1] A remote control bobbin case exchanger device comprising:
(a) a bobbin case providing member placed remote from a rotary bobbin of a sewing machine so as to provide a bobbin case in an exchangeable position;
(b) a chuck member provided to exchange the bobbin case
(c) a chuck driving member provided to transfer the chuck member toward the rotary bobbin and the exchangeable position;
(d) the chuck driving member including;
(i) a cam plate having a cammed groove directed to the rotary bobbin and having a regulation groove provided along the cammed groove and determined over its trajectory so as to be shorter than the cammed groove;
(ii) a neck transfer body having a regulation slider rotationally supported around a regulation axis which is movably provided along the regulation groove, and a follower slider having a movement axis slidably provided against the regulation slider within a predetermined range to move along the cammed groove; and
(iii) a movement axis driving member provided to reciprocally drive the movement axis along the cammed groove.
[2] According to another aspect of the invention, the movement axis driving member comprises;
a slider bar provided in parallel with the cam plate;
a drive slider movably provided along the slider bar to interfit the movement axis via a drive escape groove oriented in the same direction in which the cammed groove develops; and
a chuck transferal actuator provided to reciprocally move the drive slider along the slider bar.
[3] According to yet another aspect of the invention, the chuck transferal actuator comprises a combination of;
a long range air cylinder provided to travel the drive slider in an extended distance; and
a short range air cylinder provided to travel the drive slider in a shorter distance.
[4] According to still another aspect of the invention, the bobbin case providing member comprises a case mounting member, an outside of which has a plurality of bobbin cases removably mounted thereon; and
a rotary drive member provided to rotationally drive the case mounting member.
[Operation]
With an actuation of the movement axis driving member, the movement axis moves along the cammed groove. With the movement of the movement axis, the follower slider moves along the cammed groove.
In combination with the movement of the follower slider, the regulation slider moves in which the regulation axis interfits the regulation groove.
For the reason that the regulation groove is shorter than the cammed groove, the neck transfer body rotationally moves around the regulation axis to send the chuck member toward the rotary bobbin when the movement axis moves toward the rotary bobbin, and the neck transfer body rotationally moves around the regulation axis to send the chuck member toward the exchangeable position when the movement axis moves toward the exchangeable position.
In this way, when the movement axis drive member moves the movement axis along the cammed groove, the chuck member moves toward the rotary bobbin and the exchangeable position alternately with the assist of the follower slider.
Subsequent to the action of the movement axis drive member, the bobbin case within the rotary bobbin is replaced with another bobbin case.
[Removal of Bobbin Case]
With the movement axis actuated by the movement axis drive member, the chuck member moves toward the rotary bobbin so that the chuck member holds the bobbin case within the rotary bobbin.
Then, the movement axis moves the chuck member toward the exchangeable position. The bobbin case which the chuck member holds may be released or return to a free space within the exchangeable position during which the chuck member reaches the exchangeable position after the bobbin case is removed from the rotary bobbin.
It is to be noted that the bobbin case which the chuck member holds returns to the free space within the exchangeable position, and a replacement bobbin case is subsequently supplied by the bobbin case providing member.
[How the Bobbin Case is Exchanged]
With the chuck member sent to the exchangeable position by the movement axis, it is possible for the chuck member to hold the bobbin case introduced in the exchangeable position.
With the action of the movement axis, it is possible to move the chuck member toward the rotary bobbin so as to set the bobbin case in the rotary bobbin, and thereafter release the replacement bobbin case from the chuck member.
With the use of the remote control bobbin case exchanger device, it is possible to readily exchange the bobbin case by a new one because the bobbin case providing member is placed in the accessible position ha under the circumstances in which the rotary bobbin is inaccessibley placed. This reduces the burdens to which the sewing workers owe, and significantly mitigate the time required to exchange the under thread with an ameliorated workability.
This is all the more true especially in the industrial sewing machine in which a plurality of sewings (e.g., embroideries) are concurrently wrought out. By mounting the remote control bobbin case exchanger devices on the respective rotary bobbins, it is possible to exchange the plurality of the bobbin cases simultaneously, and thereby substantially ameliorating a sewing workability upon exchanging the bobbin cases.
REFERENCES:
patent: 5718181 (1998-02-01), Shinozuka et al.
patent: 6041725 (2000-03-01), Resta
patent: 4-61891 (1992-02-01), None
patent: 7-275552 (1995-10-01), None
patent: 7-308478 (1995-11-01), None
patent: 8-196766 (1996-08-01), None
patent: 8-280972 (1996-10-01), None
patent: 9-66181 (1997-03-01), None
English Translation of IPE Report PCT/PIPEA/409 Mar. 15, 1999.*
Kato Sei
Kinoshita Haruhiko
Kinoshita Precision Industrial
Morgan & Lewis & Bockius, LLP
Nerbun Peter
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