Wireworking – Joining wire – Implements
Patent
1997-08-13
1999-08-31
Larson, Lowell A.
Wireworking
Joining wire
Implements
140 57, B21F 1504
Patent
active
059440643
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a tying method and a tying apparatus therefor for automatically tying various articles by linear tying materials, such tyings including a tying of bar-like articles such as reinforcements, pipes and various other articles, a tying of heat insulating sheets wound about, for example, pipes, air conditioning ducts or similar, a tying of bag openings, a tying of a single article such as repair of fishing nets, medical binding or sewing-up, etc.
BACKGROUND OF THE INVENTION
In the past, in the operation for arrangement of reinforcements in construction work, for example, the tying and securing of portions of reinforcements placed one above another have been generally carried out by manual operation. An iron wire is bent in advance into two parts so as to have a U-shape. The U-shaped wire is extended over a portion of reinforcements placed one above another. A hook portion of a jig, called a twist shaft is hung on a bent portion of the iron wire and is then rotated several times to twist opposite ends of the iron wire to each other to bind the portions placed one above another. To obtain the positive tying, great skill and heavy labor is required, resulting in poor operating efficiency. Thus, mechanization therefor has been demanded.
Further, a tying machine for automatically tying reinforcements has been proposed. However, tying machines thus proposed suffer from a problem in that any one of these machines is complicated in construction, is heavy in weight, is high in manufacturing cost, and is inconvenient in handling. Further, in any one of these conventional machines, a single iron wire is drawn out of a bobbin and wound around a joined portion of reinforcements with that single iron wire to bind the joined portion, and therefore it is necessary to wind the object several times in order to provide a firm tying. A long tying material is required as compared with the tying through manual operation, resulting in a higher cost of tying materials. A further problem is that the single wire tends to be ruptured, and a strong tying force is hard to obtain as compared with the tying through manual operation for effecting the tying after the iron wire is bent into two parts to form a double configuration.
For solving the above-described problems, the present inventors have previously proposed a method and an apparatus therefor for automatically bending a continuous linear tying material drawn out of a bobbin or similar to form two wires to provide powerful tying by a single winding (International Application International Laid-Open Publication No. WO95/05313).
The tying method and the tying apparatus therefor, proposed as described above, are further improved by the present invention. It is an object of the present invention to provide a tying method and a tying apparatus therefor which is simple in mechanism, is less in the number of parts, is light-weight, is less in load imposed on a motor to prolong the service life of the motor, and can firmly and positively tie articles by a short tying material as compared with the prior art.
SUMMARY OF THE INVENTION
The method of tying articles, according to the present invention for achieving the aforementioned object, is characterized by comprising: a tying material bending step of holding a substantially extreme end portion of a continuous linear tying material being delivered by tying material holding means to apply a resistance to form a starting point at which the tying material is bent into a substantially U-shape; an encompassing and guiding step of guiding the tying material around an article to be tied while bending the former into a substantially U-shape; a tying material cutting step of cutting a rear end portion of the tying material from a continuous wire at a suitable time; and a twisting step of twisting a bent extreme end portion and a rear end portion on the other side of the tying material together to band together the articles to be tied, the bent extreme end portion and the rear end po
REFERENCES:
patent: 3880204 (1975-04-01), Sarff et al.
patent: 5170851 (1992-12-01), Kress et al.
patent: 5431196 (1995-07-01), Forrester, Jr. et al.
patent: 5558134 (1996-09-01), Miyazaki
patent: 5682927 (1997-11-01), Takahashi et al.
Saito Tsutomu
Takahashi Seiichi
Watanabe Hirokazu
Japan Automatic Machine Co., Ltd.
Larson Lowell A.
LandOfFree
Tying method and tying apparatus for articles does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tying method and tying apparatus for articles, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tying method and tying apparatus for articles will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2423550