JPH0321947Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a bottom folding drum in a bottom folding device of a bag making machine.

``Prior art'' When folding and pasting the bottom of an envelope that has already been pasted, the bottom folding device of a conventional bag making machine, such as the device shown in Publication of Utility Model Publication No. 41-9024, After creating a fold line with a folding blade, a special device is used to fold the bottom adhesive piece from the fold line toward the body and polymerize it. Therefore, the cost increases due to the folding device.

``Problems to be solved by the invention'' The present invention was created in view of the above points, and it incorporates a special folding device for pasting the bottom of envelopes, which is used in conventional bag making machines. By making it unnecessary, the cost required for this can be reduced.

"Means for Solving the Problems" The present invention will now be described in more detail with reference to illustrated embodiments.

In the figure, 1 is a bottom folding drum. Reference numeral 2 designates a body portion of the bottom folding drum 1, and 3 represents a rotating shaft of the body portion 2, which is rotated by a rotational drive source (not shown). The body 2 also has position regulating rod mounting grooves 4, 4, . . ., into which the position regulating rods described later are attached, and stop plate insertion grooves 4', 4', . A suitable number of slits 5, 5, . . . are provided in parallel in the circumferential direction, and are arranged at equal intervals, and are perpendicular to the position regulating rod mounting groove 4 and the stop plate insertion groove 4', and in which the later-described clamping plates are arranged.
In the illustrated embodiment, the number of position regulating rod mounting grooves 4 is six, the number of stop plate insertion grooves 4' is seven,
Further, the number of slits 5 is four in order to provide them at positions dividing the body 2 into four equal parts in the circumferential direction. Further, the slit 5 has a width sufficient to allow the holding plate described later to swing within the slit 5. Further, in the body portion 2, on the side opposite to the position regulating rod described later with the slit 5 in between, the position regulating rod mounting groove 4,
It is perpendicular to the stop plate insertion groove 4'. A groove 4'' is provided into which the glue blade enters.The groove 4'' is a groove into which the glue blade (described later) rotates and comes to the position for gluing the envelope. Furthermore, an envelope front end suction port 6 and an envelope trunk suction port 7 are provided in the body 2 so as to sandwich the slit 5 therebetween. The envelope body suction port 7 is provided close to the slit 5 on the rotational direction side, and the other envelope trunk suction port 7 is provided slightly away from the slit 5 on the side opposite to the envelope front end suction port 6 of the slit 5. The envelope front end suction port 6 and the envelope body suction port 7 are each equipped with a required air intake device (not shown).
It is connected to the. In addition, the envelope front end suction port 6
and the envelope body suction port 7 are provided linearly in the ungrooved portion between the position regulating rod mounting grooves 4, 4, respectively. 8, 8... is the position regulating rod mounting groove 4
This is a long hole for penetrating the base of the position regulating rod described later, which is provided on the side of the suction port 6 at the front end of the envelope.
The base of the position regulating rod is movable and adjustable inside. Reference numeral 9 denotes a holding plate provided in the slit 5, which swings at a predetermined timing within the slit 5, and holds the bottom part at the front end of the envelope in the traveling direction between it and the end surface 2a of the slit part of the body part 2. This is to temporarily hold the base of the adhesive piece. Further, 10 is a holder for the holding plate 8;
1 is a shaft for swinging the holding plate 8. 1
Reference numerals 2, 12, . . . are position regulating rods that are installed in the position regulating rod mounting groove 4 and are brought into contact with the front end of the envelope in the traveling direction of the envelope, with the tip 12a facing the vicinity of the envelope front end suction port 6. By adjusting the distance between the tip 12a and the slit 5, it can be made to correspond to the width of the bottom adhesive piece of the envelope. In addition, the position regulating rods 12, 1
The base portions 12b of each of the base portions 12b penetrate into the elongated hole 8, and the protruding lower end portions are fixed to the support plate 13. Reference numerals 14 and 14 are annular side plates for adjusting the position regulating rods attached to both sides of the body part 2 of the bottom folding drum 1, and are mounted so that they can be shifted in the rotational direction with respect to the body part 2. It is worn. 15
1 is a positioning bolt threaded onto the side of the body 2;
6 is a long hole provided in the annular side plate 14, through which the positioning bolt 15 is inserted. With the positioning bolt 15 and the elongated hole 16, it can be moved and fixed to an appropriate position. Also, bolts 1 are attached to the annular side plate 14.
By fixing the support plate 13 with the grips 7 and shifting the annular side plate 14 with the grips, the position regulating rod 1 is fixed.
2 within the position regulating rod attachment groove 4 to adjust the distance between the tip 12a and the slit 5. 18 is a state in which the base of the bottom adhesive piece of the envelope is held between the clamping plate 9 and the end surface 2a of the slit portion of the body 2 by the folding blade described later, and is glued to the envelope body by the glue blade described later. When receiving the bag, press the adhesive piece on the bottom of the envelope to the adhesive surface on the body side of the envelope so that it comes into contact with it, and then stick the bottom of the envelope, and then remove the envelope after the pasting has been completed. This is a stocker for stocking the required amount. The stocker 18 also has a horizontal base 19 and a horizontal base 19.
A support plate 20 erected above, and a stop plate 21 fixed to the tip of the base 19 so that the tip partially enters the stop plate insertion groove 4' of the body 2.
It consists of. 22 is a folding blade, 23
is a glue blade. The folding blade 22 and the glue blade 23 are disposed above the bottom folding drum 1, and when the slit 5 of the body part 2 of the bottom folding drum 1 is located directly above, the folding blade 22 and the slit 5 are disposed above the bottom folding drum 1. They are synchronously rotated vertically to match. Further, 24 is a folding blade holder, and 25 is a glue blade holder, both of which are attached via a cylindrical body 24a or a ring 25a so as to be rotated by the same rotating shaft 26. 27 is a glue roll for applying glue attached to the circumferential surface of the glue blade 23, and 28 is a glue tank (not shown) attached to the glue roll 27.
This is a glue supply roll for supplying the glue inside. 2
Reference numeral 9 denotes an envelope supply stand disposed outside the body portion 2 of the bottom folding drum 1, and is disposed on the opposite side from the stocker 18. 30 is a support base for the bottom folding drum 1.

In addition, in the other figures, 31 indicates an envelope.

"Operation" Next, the operation mode of the present invention having the above configuration will be explained.

Envelopes 31 with body pasting are delivered from the envelope supply table 29 to the bottom folding drum 1 rotating at a constant speed.
is supplied from the tangential direction. At this time envelope 31
The front end of the front end contacts the tip 12a of the position regulating rod 12 and is prevented from riding on the body 2 any further. Further, at this time, the envelope front end suction port 6 is in a state of suctioning by a suction device (not shown), so the front end of the envelope 31 comes to stick to the body 2 (see FIG. 6). When the bottom folding drum 1 further rotates in this state, the body of the envelope 31 is sucked by the envelope body suction port 7, and the envelope becomes completely attached to the body 2 (see Figure 7). . In this state, the bottom folding drum 1 further rotates,
When the slit 5 provided in the body 2 comes to the position directly above, the folding blade 22 and the glue blade 23 rotate in synchronization and align with the slit 5. At this time, the holding plate 9 is located within the slit 5 of the body 2 on the opposite side from the envelope front end suction port 6. Then, the folding blade 22 slightly enters into the slit 5 and presses and bends the base of the bottom adhesive piece 31a of the envelope 31 (the boundary with the body) into the slit 5, forming a fold line (see Fig. 5). The clamping plate 9 swings and moves to the opposite side, bends and clamps the fold line portion of the envelope 31 between it and the end surface 2a of the body 2. At this time, the envelope front end suction port 6 has released the envelope suction (see FIG. 6). At the same time, the glue blade 23 also applies glue to the body of the envelope 31. In this state, the bottom folding drum 1 further rotates (see Figures 9, 10, and 11), and the stocker 1
8, the folded front end of the envelope 31 comes into contact with the stop plate 21 and is stopped. At this time, the clamping plate 9 swings in the opposite direction again to release the clamping of the envelope. At the same time, the envelope body suction port 7 also releases suction. The envelope 31 received by the stop plate 21 in this way is moved to the stocker 18.
The bottom adhesive piece 31a of the envelope, which has already been folded at the fold line by the clamping plate 9, is removed so that it comes in sliding contact with the body of the front side of the envelope already stored in the envelope. The bottom adhesive piece 31a is then pressed against the glued portion 31b of the body of the envelope, thereby adhering the bottom adhesive piece 31a to the body of the envelope (see FIGS. 1 and 12).

``Effects of the invention'' The invention has the above-mentioned structure and function. At the same time, a folding blade makes a fold line on the bottom of the envelope, and at the same time, it is folded from the fold line using a clamping plate, and then the envelope is transported in the folded state to a stocker. The envelope is then attached to the stocker by holding the envelope stocked therein and naturally pressing the bottom adhesive piece of the envelope against the body of the envelope. Therefore, there is no need for a special device for folding and polymerizing the bottom adhesive piece as in the prior art, and the cost required for this can be reduced.

In addition, since the structure is simple, it can be manufactured at low cost, and it can be put to practical use in many ways.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram of the entire bottom folding device in the bag making machine, Fig. 2 is an enlarged view of the bottom folding drum portion of the bottom folding device, Fig. 3 is a partially enlarged plan view of the bottom folding drum, and Fig. 3 is a partially enlarged plan view of the bottom folding drum. Figure 4 is a side view of the folding blade and glue blade.
5 and 6 are sectional views of the bottom folding drum for explaining the action, FIGS. 7 to 12 are perspective views of the bottom folding drum for explaining the action, and FIG.
The figure is a plan view of the envelope. 1... Drum for bottom folding, 2... Body, 4... Position regulating rod mounting groove, 4''... Groove, 4'... Stop plate insertion groove, 5... Slit, 6... Envelope front end suction mouth,
8... Elongated hole, 7... Envelope body suction port, 9... Holding plate, 12... Position regulating rod, 13... Support plate, 14
...Annular side plate, 16...Elongated hole, 15...Positioning bolt, 19...Base, 18...Stocker, 2
0... Support plate, 21... Stop plate, 22... Folding blade,
23... Glue blade, 29... Envelope supply stand.

Claims (1)

[Scope of utility model registration request] On the outer periphery, an appropriate number of position regulating rod mounting grooves 4 in which the position regulating rod described later is installed and stop plate insertion grooves 4' into which the tip of the stop plate of the stocker described later enters are provided in parallel in the circumferential direction, and the position regulating rod is installed in the groove. Rod mounting groove 4
and a slit 5 perpendicular to the stop plate insertion groove 4';
A groove 4'' is provided on the opposite side of the position regulating rod described later with the slit 5 in between, into which the tip of the glue blade enters when it comes to the position for gluing the envelope, and furthermore, the position regulating rod mounting grooves 4, 4 are provided. In the part that is not gouged in between,
An envelope front end suction port 6 and an envelope body suction port 7 are provided to sandwich the slit 5 and perform suction at a predetermined timing, and one envelope front end suction port 6 is provided close to the slit 5, and the other The body 2 has an envelope body suction port 7 provided a little apart from the slit 5, and is arranged within the slit 5 and swings at a predetermined timing within the slit 5, so that the end face of the slit portion of the body 2 is disposed within the slit 5. 2a, which temporarily folds and clamps the fold line portion of the envelope, and the position regulating rod mounting groove 4, the position of which can be shifted along the position regulating rod mounting groove 4. The base 12 is attached so that the tip 12a faces the vicinity of the envelope front end suction port 6 so that the front end of the envelope in the direction of travel comes into contact with it.
b is installed between a position regulating rod 12 movably inserted into a long hole 8 provided in the middle of the position regulating rod mounting groove 4 on the envelope front end suction port 6 side and an annular side plate described later;
a support plate 13 to which the base 12b of the position regulating rod 12 is fixed; annular side plates 14, 14 attached to both sides of the body part 2 so as to be fixed so as to be shifted in the rotational direction of the body part 2; The bottom folding drum 1
A horizontal base 19 attached to the outside of the body 2, a support plate 20 erected on the base 19, and a support plate 20 fixed to the tip of the base 19, with the tip partially attached to the body 2. A stop plate 2 provided to fit into the stop plate insertion groove 4' of
1. A bottom folding drum in a bottom folding device of a bag making machine comprising a stocker 18 and a stocker 18.