JPH0238446B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bag feeding device, and more particularly to a device for feeding a plurality of bags held by two tapes.

[Prior art and its problems] Packaging plays an important role economically. The final cost of a packaged product to the consumer depends on how efficiently and inexpensively the packaging equipment and packaging methods, such as the auxiliary parts used in packaging, are processed. Various products, such as meat, are packaged in bags that are supplied as a series of overlapping taped bags to which one or more tapes are attached.
Such bugs are disclosed in US Pat. No. 3,587,843 (Wing) and US Pat. No. 3,698,547 (Roberts). Also disclosed is a tape tensioning device that automatically feeds taped bags. Another taped bag feeder is disclosed in Hendrich et al., US Pat. No. 4,032,038.

Although the functionality of these conventional bag feeding devices is generally satisfactory, no device is provided to automatically equalize the tension on the two bags used to support the bags.

One object of the present invention is to provide a tape-attached bag supply device that is capable of aligning tapes.

Another object of the present invention is to provide a tape-attached bag supply device that substantially equalizes the tension applied to the tape while the bag is being moved.

Means for Solving the Problems According to the present invention, the problem as described above is provided by providing a bag with tape, which is provided with a storage container in which a bag with tape is stored and a reel device for winding up an empty adhesive tape. As in, in an overlapping state, 2
In a bag feeding device for supplying bags successively arranged on parallel adhesive tapes of books, the reeling device includes a differential device, through which a single motor drive drives the other The problem is solved by providing a bag feeding device characterized in that it acts on two reels which are rotatable relative to each other.

Effect According to the present invention, rotational motion is transmitted from the drive device to, for example, two reels via the differential device. Therefore, if there is a difference in the tension between the two tapes, the reel of the tape with the weaker tension is wound, thereby removing the slack in one tape and equalizing the tension in both tapes.

[Examples] The present invention will be described below along with preferred examples.

According to the invention, a bag with at least two tapes is fed from a device comprising a reel device including a differential gear, which is cooperated with a drive means.
The differential system maintains approximately equal tension between the two tapes and maintains alignment of the stacked bags.

FIG. 1 shows a bag feeding device equipped with a differential device according to the present invention. FIG. 1 shows a series of overlapping bags 1 connected by tapes 3,5. The leading bag 7 is in the supply position. The series of bags 1 are held in a suitable storage container such as a box 9 so that the tape can be moved to a supply position.

Each tape 3, 5 is wound on a reel 11, 13, respectively. The differential device 17 is driven by the drive device 15, and the reels 11 and 13 are driven.

The differential device 17 is a conventional differential gear device, and is composed of a planetary gear train that connects two shafts arranged in a straight line and having different rotational speeds to divide the force into two equal parts. About this differential device October 1968
US Patent No. 22 by Ronald L. Von Kaler
Disclosed in No. 3406592. Differentials of this type are used in motor vehicles, the driving force of which is transmitted to the driven wheels via an actuating device so that one wheel can be driven.

It will be readily apparent that using this type of differential, the slack in one tape is removed while the other tape is held approximately stationary. This removal of slack maintains approximately constant tape tension and aligns the bags. This is an important advantage over conventional bag feeding devices.

FIGS. 2 and 3 show another embodiment of the drive mechanism that transmits the driving force to the reels 11 and 13 via the differential device 17. The drive member 19, which is a chain or belt in FIG.
Interruptably driven by The driving force of the motor 21 is transmitted to the differential gear via a chain and sprocket, or a belt and a pulley. According to a preferred embodiment, the apparatus includes a sensing device 23 (see FIG. 1), such as an electrical or mechanical sensing device, to detect whether the bag is in the correct feeding position. If the bag is not in the correct feeding position, the motor 21 is activated via the detection device 23 and is deenergized once the bag is in the correct position.

In the embodiment shown in FIG. 2, rotational motion is transmitted from the motor 21 to the differential gear 17 via the drive member 19, which is a belt, the pulley 31, and the hollow shaft 33. Rotational motion is transmitted from the differential device 17 to the reel 11 via the shaft 35 , and from the differential device 17 to the reel 11 via a shaft (not shown) extending inside the hollow shaft 33 and the shaft 37 . rotational motion is transmitted to.

FIG. 3 shows a drive mechanism as yet another embodiment. In this case, the drive device 15 includes an air cylinder 25 and a lever connection device 27 connected to the air cylinder 25.
functions to allow movement of the differential 17 in only one direction. Air cylinder 25 is connected to detection device 23 in a similar manner as in FIG.

In the embodiment shown in FIG.
From 5′, the lever coupling device 27 and the hollow shaft 3
The rotational motion is transmitted to the differential gear 17 via 5'. Then, rotational motion is transmitted from the differential device 17 to the reel 11 via the shaft 35', and the differential device 17
Rotary motion is transmitted from the reel 13 to the reel 13 via a shaft (not shown) extending inside the hollow shaft 33' and a shaft 37'.

[Effects] Accordingly, it will be appreciated that according to the tape-attached bag feeding apparatus of the present invention, the bags are moved through the differential device, and a substantially equal tension is applied to the tape, so that the bags are substantially aligned. Conventional equipment does not compensate for such alignment and must be manually compensated for by winding, cutting, or tying one of the tapes so that the tension on the two tapes is approximately equal.

It will be understood that the invention is not limited to the illustrated embodiments, but rather encompasses modifications within the spirit of the claims.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a tape-attached bag supply device equipped with a differential device according to one embodiment of the present invention, FIG. 2 is a perspective view of a differential device and drive device according to another embodiment of the present invention, and FIG. The figure is a perspective view of a differential gear and a drive device according to still another embodiment of the present invention. 1... Buzz, 3, 5... Tape, 9... Box,
11, 13... Reel, 16, 15'... Drive device, 17... Actuation device, 19... Drive member, 21
... Motor, 23 ... Detection device, 25 ... Air cylinder, 27 ... Lever connection device.

Claims (1)

[Scope of Claims] 1. A storage container in which a bag 1 with tape is stored, and a reel device for winding up empty adhesive tapes 3 and 5, which are arranged in an overlapping state so as to provide a bag 1 with tape. In a bag feeding device for feeding bags 7 successively arranged on two parallel adhesive tapes 3 and 5, the reel device includes a differential device 17, and a single bag is fed through the differential device. Two reels 11, 13, one drive being rotatable relative to the other
A bag feeding device characterized in that it acts on. 2 detecting the presence or absence of the bag 1 at the supply position and transmitting it to the drive device 15, 15';
A device according to claim 1 for actuating said drive devices 15, 15'. 3. Device according to claim 1, in which the drive device 15' comprises a pneumatic cylinder. 4. The apparatus of claim 1, wherein the drive device 15 includes a sprocket and chain connected to the differential.