JP3511937B2 - Dry hit prevention device in bag binding machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag binding machine that binds the mouth of a bag containing goods with a clip. When left,
The present invention relates to a blank hit prevention device in a bag binding machine that can be reactivated only after confirming that the clip has been removed. 2. Description of the Related Art To close the mouth of a bag made of polyethylene or the like containing a product, a bag binding machine that binds the mouth of the bag with a plastic clip is used. This is disclosed in
As shown in JP-A-167233, when the mouth of the bag is introduced into the end of the guide passage, the feeding device of the feeding device 32 is operated and the mouth of the bag is closed with the leg of the gate-shaped clip. The clip is fed so as to be sandwiched, and the leg pieces are stacked up and down. Further, the tip of the leg piece of the fed clip is swaged by a swaging device of the binding unit 33 (swaging unit) to be bound. By the way, a main switch lever is rotatably arranged in the middle of the guide passage so as to traverse the bag, and at the time of binding, the main switch lever is pushed in at the mouth of the bag to be introduced while rotating, so that the bag is moved to the end of the guide passage. The main switch is turned on when pushed down. Then, when the binding is completed, the bag is pulled out from the guide passage, so that the pressing force on the main switch lever is released and the operation returns. However, as soon as the bag is broken into the guide passage and the main switch lever is turned, the bag is torn or the handle of the bag slips, causing a miss swing.
Even in this case, since the caulking is performed, the clip is not ejected together with the bag, but remains inside the machine, and thereafter, it is hit with no air. In such a case, since the main switch lever returns earlier than usual, if the main switch lever returns within 0 or 2 seconds, there is a possibility that a clip may remain inside the machine, and the next unity It is configured to stop operation. The operator only has to remove the clip and reactivate it. However, in the conventional bag binding machine, if the power switch is turned off and then turned on again without removing the clip, the bag is automatically reset and restarted. It is configured to be able to. For this reason, when the subsequent operation is performed, the above-mentioned remaining clips are stuck inside the machine, which has caused a component to be damaged. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and to provide an idle hit prevention device in a bag tying machine which can perform the next operation only after the bags are securely tied with a clip. It is the subject. SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an apparatus for preventing a blank hit in a bag binding machine according to the present invention comprises:
A guide passage for guiding the mouth of the bag, and the mouth of the bag introduced into the caulking portion at the end of the guide passage are fed so as to be sandwiched by the legs of the gate-shaped binding clip, and the legs intersect. and whether the feed unit, the tip of the leg of the clip superimposed
A Rukashime unit to Umate cohesion, caulking after bundling
Only perform the next bundling operation when there is no clip in the unit.
In an apparatus for preventing an empty shot in a bag binding machine to be performed, a flap provided with an engagement groove capable of introducing a mouth of the bag below the caulking portion is provided for a bag in a bound state. It is provided so as to engage with the clip when the mouth portion is pulled out downward and rotate downward, and also enables the operation of the next bundling operation only when the rotation of the flap is detected by the detecting means. It is characterized. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1, reference numeral 1 designates an outline of a bag binding machine. The binding machine main body 1 is formed in a horizontal plate shape, and a bag a extends from one side of a front portion to a central front portion. A guide passage 3 for guiding the mouth portion 2 is formed, and a caulking portion 4 is provided at the tip thereof. A feeding device 5 is provided at the rear of the caulking unit 4.
However, a caulking device 6 is arranged at the front. Further, a roll 8 around which a clip tape 7 to which a number of bundling clips b are connected is mounted on the rear portion of the bundling machine main body 1. As shown in FIG. 2, the clip b is formed in a gate shape by a plastic sheet, has leg pieces 9 on both sides, and a pin engaging hole 10 is formed through the center of the leg piece 9. I have. The entire clip tape 7 is formed in a tape shape in a state where both shoulders of each clip b and the tip of the leg piece 9 are connected to each other. The feeding device 5 is provided so as to be moved back and forth by a driving device (not shown).
After a pin (not shown) is engaged with the engaging hole 10 of the leg piece 9 of the first clip b of the first clip b, and only one clip is sent to the caulking portion 4, the pins on both sides are brought closer to the first clip b. The leg pieces 9 are crossed, and the detailed mechanism is as shown in FIGS. 5 and 6 of Japanese Patent Application Laid-Open No. 10-203509 filed by the present applicant, and will not be described here. As shown in detail in FIGS. 3 and 4, the caulking device 6 is provided inside a holder 11 and provided with a fixing pin 14 at a tip of a base member 13 fixed on a lower substrate 12. , A fixing pin 14 above the base member 13.
A die plate 16 having a die 15 for receiving
By pressing a pressing plate 19 provided with a pressing pin 18 which engages with the holder 5, an intermediate portion of the die plate 16 and a rear end of the pressing plate 19 are supported on shafts 20 provided on both side walls of the holder 11.
An actuating member 21 that is rotatably supported and movable back and forth on these members is provided, and when the roller 22 of the actuating member 21 moves along a guide groove 23 formed in the side wall of the holder 11. When the die plate 16 and the pressing plate 19 are engaged with the projections 24 and 25 formed at both ends of the both sides of the pressing plate 19 and move to the caulking portion 4 side, the die plate 1
When the plate 6 and the pressing plate 19 are pushed down and moved to the opposite side, the die plate 16 and the pressing plate 19 are moved upward. Before bundling, the roller 22 is located at an end remote from the caulking portion 4 and has the die plate 16 and the pressing plate 1.
9 is moving up. When the user introduces the caulking portion 4 from the guide passage 3 by holding the upper and lower portions of the mouth portion 2 of the bag a, the switch is turned on, and the feeding device 5 is operated to supply the clip b at the tip of the clip tape 7 to the caulking portion 4. I do. When the mouth 2 of the bag a is sandwiched between the legs 9 of the clip b by the feeding device 5 and the legs 9 are crossed and overlapped (at this time, the mouth 2 of the bag a 9, the fixing pin 14 is located below the intersection), and the driving member moves the operating member 21 to move the roller 22 into the guide groove 23.
5, the roller 22 engages and presses the upper surface of the pressing plate 19 as shown in FIG. 5, so that the die plate 16 and the pressing plate 19 rotate downward around the support shaft and the fixing pin Leg 9 of clip b placed on 14
Press. As a result, the clip b is pressed into the die 15 of the die plate 16 together with the fixing pin 14, and the tip of the clip b is pressed by the pressing pin 18 of the pressing plate 19 to be crushed and spread. It is caulked and joined together, and the binding is completed. The swaged portion 26 of the clip b in this state is as shown in FIG. Further, after the operating member 21 moves to the opposite side and the die plate 16 and the pressing plate 19 are separated from the fixing pins 14, the operator pulls out the mouth 2 of the bag a from below the guide passage 3, thereby caulking. The clip b is released from the device 6, and the next binding is prepared. Next, as shown in FIGS. 3 and 4, a flap 27 is disposed below the caulking portion 4 so as to be rotatable about the shaft 17 downward. The flap 27 is formed with an engagement groove 28 that can guide the mouth 2 of the bag a. Also, a protruding piece 29 is formed upright on one side of the flap 27,
A photo sensor 30 for detecting rotation of the flap 27 is provided in the vicinity thereof. When the protruding piece 29 is ejected from the groove 31 of the photosensor 30 when the flap 27 rotates, the photosensor 30 detects that the flap 27 has rotated, and when the rotation is detected, the next binding is performed. The work can be resumed, and if the rotation of the flap 27 is not detected, it is controlled so that the next binding work cannot be restarted. The detecting means is not limited to a photo sensor. A limit switch that engages with the flap 27 during rotation may be used. Here, a description will be given of the binding mode when the flap 27 is used.
Are bound by the clip b, and the opening 2 of the bag a is pulled out from the guide passage to complete the operation. According to this, when the mouth portion 2 of the bag a is pushed along the guide passage 3 to the caulking portion 4, the mouth portion 2 simultaneously enters the inside of the engagement groove 28 of the clip b. Therefore, after the caulking device 6 is activated and the binding is completed, the mouth 2 of the bag a
As the clip b is caught in the engagement groove 28 of the flap 27 when it is pulled out downward, the flap 27 rotates downward as shown in FIG. 6, and this rotation is detected by the photo sensor 30 shown in FIG. . The output of the detection signal enables the binding operation at the next stage. However, if the mouth portion 2 of the bag a is pulled out before the caulking operation by the caulking device 6 is completed, the bag 2 is hit without hitting, and the caulking device 6 remains in a state where the clip b of the caulking failure remains. In addition, if the mouth 2 of the bag a is pulled downward without the clip b, the clip b does not engage, so that only the mouth 2 of the bag a comes off, and the flap 27 does not rotate. Therefore, the detecting means 3
Since no detection signal is output from 0, the binding operation of the next stage cannot be restarted. In order to restart the operation, it is necessary to rotate the flap 27. At this time, it is possible to visually recognize that the clip b is clogged, and by removing this, it is possible to effectively prevent the clip b from being clogged inside the machine and causing an empty shot. In this case, the partition 31 is attached to the flap 27.
Is formed, by rotating the flap 27 downward, the partition 31 also falls down, and the clip b remaining with the partition 31 is pushed back, so that the clip b can be forcibly discharged to the outside.

[Brief description of the drawings] FIG. 1 is a perspective view schematically showing a bag binding machine according to the present invention. FIG. 2 is a perspective view showing a binding clip and a connected state thereof. FIG. 3 is a perspective view showing a caulking device. FIG. 4 is a central sectional view of a caulking device. FIG. 5 is an explanatory view of a caulking device and an operation mode. FIG. 6 is an explanatory view of an operation mode of a flap of the idling prevention device. FIG. 7 is an enlarged view of a mouth portion of a tied bag. [Explanation of symbols] a bag b clip 2 mouth 4 Caulking part 5 Feeder 6 Caulking device 9 leg pieces 27 flap 28 engagement groove 30 Photo sensor (detection means)

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65B 51/04 B65B 51/08 B65B 7/16 B65B 67/06 B65B 57/01-57/16

Claims (1)

(57) [Claims 1] A guide passage for guiding the mouth of the bag, and the mouth of the bag introduced into the caulking portion at the end of the guide passage is connected to a leg of a gate-shaped binding clip. feeding so as to sandwich in pieces, and comprising a feed unit to cross the leg, and a Rukashime unit to Shimete cohesion or the tip of the leg of the clip superimposed,
Next, only when there is no clip on the caulking unit after binding
Blanking in a bag tying machine to perform step tying work
In the prevention device , a flap provided with an engagement groove capable of introducing the mouth of the bag below the caulking portion is engaged with a clip when the mouth of the bag in a bound state is pulled out downward. And a second bundling operation is enabled only when the rotation of the flap is detected by a detecting means.