JPH035532Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a device for continuously and stably supplying packaging bags, and includes packaging bags that cannot be brought into close contact with each other because a bulky chuck is provided on the inner surface of the bag opening. Or, in order to avoid bending packaging bags such as packaging bags that are weak and do not retain their shape because the bag material is extremely thin, one by one is fed intermittently to a predetermined position on a feeding stand at predetermined time intervals. It is configured so that it can be released.

(Prior Art) In a conventional packaging bag feeding device, a large number of packaging bags are fed in a stacked manner onto a slow speed feeding belt between guide wall plates, and the diagonally lower surface of a large diameter roll placed above the belt is fed. The packaging bags that are in contact with the bag are sequentially fast-forwarded at a slightly faster speed, and then the small-diameter roll with a high speed is placed in front of the large-diameter roll and almost in contact with the feed belt, and the endless belt for feeding is hooked around the small-diameter pulley. , a mechanism in which the leading packaging bag, which has been slightly separated by the rapid feeding of the large-diameter roll described above, is rapidly fed one by one to a predetermined position on the feeding stand, and then repeatedly sucked up by a suction cup arm, etc. is particularly suitable. It is disclosed in Publication No. 58-28166 and is publicly known.
However, the above-mentioned known device is adapted to a packaging bag made of a relatively thick film or the like, which is stiff and allows almost close contact.

However, recently, as shown in Fig. 4, two parallel engagement protrusions b are provided on one side of the inner surface of the bag opening of packaging bag A, and a single protrusion c is provided on the other side, and between the engagement protrusions b. There has been an increase in packaging demand for packaging bags that have chucks d into which protrusions c are fitted and have a bulky bag opening, or packaging bags that are weak because the bag members are extremely thin. Even if these items are fed onto the feeding table by the fast-feeding endless belt hooked on the small-diameter pulley of the conventional device, they tend to be bent as shown in the solid line in Figure 5, and the bag end is placed in a predetermined position on the feeding table. This makes it difficult to feed the product, and since the suction points of the suction cup arms are aligned at the bottom, there is a drawback that the supply to the packaging machine cannot be made uniform every time.

(Problems to be Solved by the Invention) The present invention eliminates such drawbacks and supplies the packaging bags by stretching them so as not to curve them as they are fast-forwarded onto the feeding stand, and then the series of The purpose of this is to prevent any hindrance to the automatic operation of the system.

(Means for Solving the Problems) The present invention has a configuration to solve the above-mentioned problems, and has a configuration in which a large number of packaging bags are dropped on a slow speed feeding belt 5 between guide wall plates 7, 7. The packaging bag a is fed in a stacked manner, and the endless feeding belt 22 is passed over the first small diameter pulley 18 on the rear side and the second small diameter pulley 20 on the front side on the feeding belt 5 to make it faster than the feeding belt 5. In this device, the pulley 2 near the second small diameter pulley 20 on the front side is used.
5 and a pulley 26 provided in front of the bag stopper 8 of the feeding table 6.
In addition to increasing the speed, the guide walls 7, 7 of the machine base 1
This relates to a continuous and stable supply device for packaging bags, characterized in that a presser belt 30 is provided on the corresponding inner surface of the bag and presses a single packaging bag a fed onto a feeding table 6 onto the feeding table 6. be.

(Example) An embodiment of the present invention will be described.

In the figure, 1 is a machine base with guide rolls 3 and 4 pivotally supported near the front and rear edges of a long hole 2 provided in the feeding direction of the packaging bag, and an endless string belt placed in the parallel grooves of these rolls. The upper running part of the belt 5 is extended over the machine base 1 to form a feed belt 5. A feeding table 6 is formed in the front part of the elongated hole 2.

As shown in FIG. 2, the machine base 1 is provided with a pair of guide wall plates 7, 7 on both sides of the elongated hole 2 that can be adjusted to correspond to the spacing that matches packaging bags a of several different widths, and extend to the feeding table 6. A bag stopper 8 is provided near the front end of the stand 6.

Reference numeral 11 denotes a support frame in which a pair of left and right side plates 12 can be moved on the machine stand 1 in the direction of supplying the packaging bags a, and a drive shaft 13 is passed between the side plates 12 and 12 to be pivotally supported. The drive shaft 13 is driven by a motor 14 attached to one side plate 12 via a belt 15. A large-diameter feed roll 16 rotating above the feed belt 5 is fixed to the drive shaft 13, elastic rings 17, 17 are wound around the outer periphery, and first small-diameter pulleys 18, 18 are attached to both end surfaces of the large-diameter roll 16. are integrated,
A second small diameter pulley 20, 20 having the same diameter as the first small diameter pulley 18 is mounted between the front ends of a pair of swing arms 9, 19 that are fitted on the outside of the small diameter pulleys 18, 18 of the drive shaft 13 and protrude downward. Passing the supported shaft 21, the first small diameter pulleys 18, 18 and the second small diameter pulley 20,
An endless belt 22, 22 for feeding is stretched between the belt 20 and the belt 20. Also, corresponding to the rear end of one swinging arm 19,
A limit switch is attached to the protruding rod 23 from the support frame 11.
Ls is attached, and when several of the packaging bags a sent on the feed belt 5 lift up the second small diameter pulleys 20, 20 and the tips of the swing arms 19, 19 via the endless belts 22, 22, the limit switch is activated. Ls senses this and commands the stop of the motor that drives the feed belt 5, and after that, the endless belts 22, 22 alone rapidly feed the packaging bags a one by one toward the delivery table 6.

In this embodiment, in the above-mentioned known structure disclosed in Japanese Patent Publication No. 58-28166, a pulley is installed on the corresponding inner surfaces of the guide wall plates 7, 7, slightly behind the second small diameter pulley 20 and in front of the bag stopper 8. 25, 26 and a lower pressure pulley 27 slightly rearward of the pulley 26 are pivotally supported. In this configuration, the pulley 26 has a shaft supporting piece 2 that is loosely fitted into the guide wall plates 7 and fixed to the machine base 1.
The drive shaft 29 supported by the pulley 2
A narrow presser belt (endless) 30 that runs along the corresponding inner surfaces of the guide wall plates 7 and 7 is stretched between the lower pressure pulley 27 and the lower pressure pulley 27. The drive shaft 29 is the machine base 1
It is driven via a belt 32 by a fast feed motor 31 attached to the lower surface of the . The presser belt 30 runs at a gentle slope between the pulley 25 and the lower pressure pulley 27, almost touching the surface of the feeding table 6, and its running speed is made slightly faster than the running speed of the endless belt 22.

A limit switch 34 is provided between the bag stoppers 8, 8, with a sensing swinging piece 33 projecting from the lower surface of the feeding table 6 for sensing contact of the tip of the packaging bag a.
The switch 33 is actuated when the tip of the packaging bag a comes into contact with the fast forward motor 31 and the presser belt 3.
Stop 0.

The other details are as shown in Japanese Patent Publication No. 58-28166, so the explanation will be omitted.

As is well known, the present invention uses the running portions on both sides of the packaging bag a which are fed out to the feeding table 6 by the endless belt 22 with the second small diameter pulley 20 as the turning portion, which are in contact with the guide wall plates 7, 7. , the bag stopper 8 is guided to the feed table 6 while being slightly pressed by the presser belts 30, 30 which are faster than the running speed of the endless belt 22, and as a result, the bag stopper 8 is normally held in front of the second small diameter pulley 20 by its own shape-retaining force. , 8, is stretched by fast running of the presser belts 30, 30, and is fed by running it until it hits the bag stoppers 8, 8 and the sensing rocking piece 34 of the limit switch 34. do.

(Function) As shown by the solid line in Figure 5, the bag of the present invention has a wavy shape due to the chuck d, etc., and it is not possible to maintain the flat bag shape simply by feeding it out using the endless belt 22 on the feeding table 6, so that it is not curved. The resulting packaging bag a is stretched by the presser belt 30 as shown by the chain line in FIG. 5 without causing such curvature, and is fed to the bag stopper 8 on the delivery table 6.

(Effects) The present invention has the above-mentioned structure and the above-described operation, and is a device for rapidly feeding the packaging bag a to the bag stopper 8 near the front end of the feeding table 6 by means of the endless feeding belt 22. endless belt 2
2, and the guide wall 7 of the machine base 1,
7 and presses the single packaging bag a fed onto the feeding table 6 onto the feeding table 6, so that the shape retention of the bag shape is improved. The present invention has effects such as being able to continuously and stably supply packaging bags which are prone to bending without being bent, by stabilizing the supply timing, and also being able to be manufactured without modifying the conventional known device itself.

[Brief explanation of the drawing]

The accompanying drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal side view, Fig. 2 is a partially cutaway plan view, Fig. 3 is a front view, and Fig. 4 is a partial perspective view of a packaging bag with a zipper. , FIG. 5 is a side view showing the curvature of the packaging bag a on the feeding table 6, which is a drawback of the conventional device. 1... Machine stand, 5... Feeding belt, 6... Feeding table, 7... Guide wall plate, 8... Bag stopper, 11
...Support frame, 13...Drive shaft, 14...Motor,
18...First small diameter pulley, 19...Swinging arm, 20
...Second small diameter pulley, 22...Endless belt, 2
5, 26...Pulley, 27...Lower pressure pulley, 30
...presser belt.

Claims (1)

[Scope of claim for utility model registration] Slow speed feeding belt 5 between guide wall plates 7, 7
For feeding, a large number of packaging bags are supplied in a stacked manner, and the first small-diameter pulley 18 on the rear side and the second small-diameter pulley 20 on the front side are hooked onto the feed belt 5 at a faster speed than the feed belt 5. In a device that rapidly sends the packaging bag a to the bag stopper 8 near the front end of the delivery table 6 using the endless belt 22, the pulley 25 near the second small diameter pulley 20 on the front side and the front side of the bag stopper 8 of the delivery table 6 are provided. A single packaging bag a is placed on a pulley 26 provided on the feeding table 6 to make the speed faster than the endless feeding belt 22, and provided on the corresponding inner surfaces of the guide walls 7, 7 of the machine stand 1, so that a single packaging bag a is sent out onto the feeding table 6. A device for continuously and stably supplying packaging bags, characterized in that a presser belt 30 is provided to press the bag onto the feeding table 6.