JPH0318581B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a connecting box in which a plurality of three-piece boxes are connected to each other so that they can be separated at the end faces.

[Prior Art] Recently, from the viewpoint of handling high-mix, low-volume production and streamlining the distribution process, two or more cardboard or other cardboard boxes containing products are connected into one box so that they can be separated when necessary. Packaging is widely practiced. On the other hand, three-piece boxes require the least amount of labor among all packaging boxes, and are popular these days when there is a strong demand for cost reduction.

[Problems to be Solved by the Invention] However, since the various three-piece boxes conventionally used have a structure in which the connecting pieces are on the end plate side, it is difficult to connect and connect them continuously automatically. I couldn't get it to go down.

[Means for Solving the Problems] Therefore, as shown in Fig. 1, the inventor provided a joint piece on the body blank and connected the three-piece boxes (unit boxes) 1, 1 so that they could be separated at the end faces. In addition to developing the connecting box 2 with this structure, we also developed a method for manufacturing the connecting box using such a three-piece box.

Therefore, the present invention provides a method for continuously and automatically manufacturing the connecting box 2, and its feature is that a plurality of three-piece boxes are connected so that the end faces can be separated. When manufacturing the box, the first body blank with adhesive applied to the outer surface of the joint piece is bent into a shape using a press die, and the ends of the left and right end plates are separated using a separating means to separate the end surfaces of each box body. After forming a first box by crimping the first part on both sides of the bent body blank, move the first box by one box in the length direction of the end plate, and then attach both end plates. A second body blank bent with a press die is inserted by widening the gap between the free ends of the body blank, and is crimped in the same manner as the first case to form a second box. The purpose is to assemble and integrate the three-piece box.

The connecting box 2 shown in Fig. 1 is of the top-butting type (A type), but a top flap overlapping type or a plug-in type (B type) can also be manufactured in the same way. I can do it.

This connection box 2 is a combination of 32 body blanks shown in FIG. 1b and 42 end plates shown in FIG. 1c. The body blank 3 has a bottom surface 5, side surfaces 6, 6, upper and outer flaps 7, 7, and respective joining margins 8, 8, 9 defined by creases. In addition, the end plate 4 is divided by a sewing machine line serving as a separating means 11 at the end portion 10 of each box body, and an upper inner flap 1 is separated as necessary.
2, 12 and a notch 13 for easy separation,
13 will be provided. Other cutting tapes, half-cut rules, and the like can also be used as the cutting means. Furthermore, although the illustrated one is a two-piece connected body, a body in which three or more pieces are connected can be produced in the same manner.

[Example] Hereinafter, the present invention will be described in detail based on an example shown in the drawings.

First, as shown in FIG. 2a, the body blank 3 is bent into a shape using a press die. Prior to this, an adhesive (hot melt, vinyl acetate, or a combination of these) is applied to the outer surface of each joint piece 8, 8, and 9 in the sheet-like stage, but creases are created at the boundaries of each joint piece before application. It's good to keep it. Next, the body blank 3 [first box body] is bent as shown in Fig. 2 b.
The first portions of the end plates 4, 4 are crimped from both sides to form a first box. continue,
After moving the first box by one box in the length direction of the end plate 4, the free end sides of the end plates 4 are opened outward from each other as shown in FIG. A second body blank 3 bent in the same manner as described above is inserted into the bent portion, and the end plates 4, 4 are crimped as shown in FIG.

The free end of the end plate may be expanded by maintaining the expanded state with an expanding tool, or by creating a crease with a separating means (particularly in the case of a sewing machine line). Further, although the box is usually moved after the first box is formed, it is also conceivable to move the press die or to provide a plurality of boxes and leave them as they are.

Next, an example of a manufacturing apparatus for specifically carrying out the method of the present invention is shown in FIGS. 3 to 7. however,
This is just one example, and various modifications may be made as means to embody each step.

However, the box making device 20 of FIG.
As shown in the figure, a body blank supply device 22 is located at the front of the machine base 21, a press device 23 is located at the rear of the machine base, and a body blank transfer device 24 and a gluing device 2 are located at the intermediate portion.
5. An end plate support and pressure bonding device 26 is provided at the bottom of the press device 23, a cylinder group 27 (described later) is provided in front of the device 26, an end plate supply device 28 is provided on both sides of the body blank supply device 22, and an end plate transfer device 29 is provided behind it. is provided. Each device is synchronously driven by a motor 30.

First, the body blanks 3 are sent out one by one by the puncher 31 and delivery roller 32 of the supply device 22, and are conveyed to the press device 23 by being sandwiched between upper and lower belts of the transfer device 24. At this time, re-creating by the creaser 33 and folding by the folding guide 34 are applied to each joint piece 8, 9. Further, the gluing device 25 applies each adhesive to the outer surface of each bent piece in a flat state using a vinyl acetate roller 36 and a hot melt roller 37.
Incidentally, this application may be carried out with the crease still in place. In the press device 23, the body blank 3 is pressed down and bent into a shape by the press die 38 (the state shown in FIG. 2a).

Prior to that, the feeder 39 of the supply device 28
The left and right end plates 4, 4, which are fed one by one onto the belt of the transfer device 29 from the feed roller 32, are set on the end plate support and pressure bonding device 26. In addition, the end plate supply device 28
may be provided closer to the rear than the position shown in the figure or on both sides of the press device 23.

As shown in FIG. 5, the end plate support and pressure bonding device 26 has a support plate 41 fixed to a pressure bonding plate 40 in a |--shaped cross section, and is disposed on the left and right sides of the lower part of the press device 23. It is normally biased to expand upward as shown by the solid line, and each end plate 4 is received in this state. At this time, end plate 4
is controlled by the end plate stopper 42 and the end plate positioning cylinder 43.
The parts constituting the box are placed below the press die 38 (ie, at the compression section). Subsequently, the press mold 38 descends and presses down the support plate 41 through the bottom surface 5 of the body blank, and the pressure bonding plate 40 becomes vertical as shown by the chain line, pressing the end plate 4 against the joining piece and bonding it. Thus, the first box body 1
is formed (the state shown in FIG. 2b).

Incidentally, reference numeral 44 in FIG. 5 is a screw for adjusting the interval between the pressure bonding plates 40 to match the size of the box. The position of the stopper 42 and cylinder 43 is also the same as the connection box 2.
Adjust depending on the size. Furthermore, the positions of the body blank guide plate 45, the body blank stopper 46, and the respective kickers 31 and 39 shown in FIGS. 3 and 4 can be adjusted according to the size of the box. (In Figure 3, the upper half is a small box,
The lower half shows the case of a large box. ) When the press mold 38 rises, the pressure bonding plate 40 returns to its original position and the box body rises up somewhat. In this state, the box transfer cylinder 47 in the cylinder group 27 is operated to move the box by one box in the length direction of the end plate (to the rear in this example) [the state shown in FIG. 2b]. Subsequently, the end plate expanding cylinder 48 is operated to rotate the expanding bar 49 (dashed line in FIG. 6), thereby pushing the free ends of each end plate apart.
In this case, the end plate 4 is creased at the perforation line and maintains the expanded state even when the expansion bar 49 returns to its original state (the state shown in FIG. 2c). In this state, the second body blank 3 is bent and pushed in the same manner as described above, and the end plate is adhered by the action of the pressure bonding plate 40 to form a second box. Thus, the connecting boxes 2 are completed (the state shown in FIG. 2 d), and the resulting connecting boxes 2 are sequentially pushed backward and conveyed to the product storage position by the conveyor.

In this example, two unit boxes 1 are connected, and two body blanks are supplied to one set of end plates. The operation timing of each device is performed in the order shown in the time chart of FIG. In the illustrated case, one set of connecting boxes is manufactured in about 4 seconds. In order to connect three or more unit boxes, it is sufficient to use end plates partitioned into three or more units and repeat the operations of expansion, insertion, and crimping. Furthermore, if a single end plate is used in the above-mentioned apparatus, individual three-piece boxes that are not connected can be manufactured, and the operating rate of the apparatus can be increased even when a connecting box is not required.

In addition, in the above example of the device, the free end of the end plate was expanded using a cylinder, but other expansion tools such as an air suction device 51 as shown in FIG. 8 or an L-shaped fitting 52 as shown in FIG. You may also use The air suction device 51 can also be used for positioning the end plate 4.

[Effects of the Invention] As described in detail above, when manufacturing a detachable three-piece box-type connecting box, the present invention press-forms a first body blank provided with a joint piece with a press die, and then press-forms each box. The part that will become the end face of the body is crimped to the first position of the left and right end plates separated by a separating means, then the free ends of the end plates are expanded, the molded second body blank is inserted and crimped, and the following is done. A predetermined number of connected boxes can be automatically and continuously obtained by performing similar operations. Therefore, the connection of three-piece boxes, which has heretofore been considered difficult, can be easily, reliably, and efficiently carried out, increasing the use of three-piece boxes, and realizing a significant reduction in packaging costs.

[Brief explanation of the drawing]

Fig. 1a is a perspective view showing an example of a connecting box obtained by the method of the present invention, b and c are plan views of its body blank and end plate, and Figs. 2 a to d are steps for manufacturing the connecting box according to the present invention. FIG. 3 is a plan view showing an example of an apparatus for carrying out the method of the present invention, FIG. 4 is a front view, and FIG.
Figure a is a side view of the end plate support crimping device, b
6 is a front view, FIG. 6 a is a plan view of the cylinder group, b is a front view, FIG. 7 is a time chart, and FIGS. 8 and 9 are schematic perspective views showing other examples of the expansion device. It is. 1...Three-piece box, 2...Connection box,
3...Body blank, 4...End plate,
8, 9... Joining area, 10... End surface, 11... Separating means, 20... Box making device, 22... Body blank supply device, 23... Pressing device, 26...
... End plate support and pressure bonding device, 28 ... End plate supply device.

Claims (1)

[Claims] 1. When manufacturing a connecting box in which a plurality of three-piece boxes are connected so that the end faces can be separated, a first body blank with adhesive applied to the outer surface of the joint piece is bent into a shape using a press die. , After forming the first box by pressing the respective first parts of the left and right end plates, which are separated by a separation means from the end surfaces of each box, on both sides of the bent body blank, The first box body is moved one box length in the length direction of the end plates, and then the gap between the free end sides of both end plates is widened, and the second body blank bent with a press die is inserted, and the second body blank is inserted into the first body blank. A method for manufacturing a connecting box, characterized in that a second box is formed by crimping in the same manner as in the above case, and a predetermined number of three-piece boxes are assembled and integrated in the same manner. 2. The method of manufacturing a connecting box according to claim 1, wherein the free end of the end plate is expanded by maintaining the expanded state with an expanding tool. 3. The method of manufacturing a connecting box according to claim 1, wherein the free end of the end plate is expanded by being bent at the separating means.