JPH04142225A - Packaging device - Google Patents

Abstract

PURPOSE:To improve finishing quality of wrapping sheet and adhesive tape free from curvature or wrinkles by stopping suction of air from a sucking nozzle just before bonding action to press down a wrapping sheet, while air is not being sucked. CONSTITUTION:While a sucking nozzle 31 is at an upper retracted position, a motor 33 is actuated so that the sucking nozzle 31 makes contact with the upper surface on the forward end of a wrapping sheet 1 to be attracted thereto by sucking force of air. When the sheet 1 is bent and deformed and negative pressure in a suction pipe 36 is detected, the motor 33 is stopped and turned reversely and the nozzle 31, in a sucking state, moves upward. A chain motor 32 is actuated to transfer the sheet 1 to a specified position of a work area B. Next, the nozzle 31 is lowered to bond the sheet 1 to an adhesive tape 5. Just before the bonding of the tape 5, suction of air for the nozzle 31 is stopped and the nozzle 31 on one side, while air is not being sucked, presses against the upper surface of the sheet 1, where the tape is bonded, while suction of air for positioning the tape 5 is stopped.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention is a method of suctioning the topmost packaging sheet stacked and stored in a storage section using an air suction type suction nozzle and transferring it to a packaging work section. In addition to being equipped with a supply device for supplying
A packaging device configured to adhere the lower surface side of the suction acting part of the sheet supplied to the packaging work section to a packaging fixing adhesive tape that is supported in a fixed position by air suction by the pressing force of the suction nozzle. Regarding.

[Conventional technology]

Conventional packaging apparatuses have been considered in which the air suction action of the suction nozzle continues until the end of the pressure bonding operation to the adhesive tape.

[Problem to be solved by the invention]

However, when using the above conventional structure, the suction action part of the packaging sheet may be pressed and adhered to the adhesive tape while being bent and deformed into a convex shape due to the air suction force in the suction nozzle. In such cases, the bent and deformed state is maintained even after packaging is completed, resulting in a disadvantage that the finished quality of the packaging deteriorates.

The present invention aims to solve the above-mentioned problems.

[Means to solve the problem]

A characteristic configuration of the present invention is that, in the packaging apparatus described at the beginning, air suction to the suction nozzle is stopped immediately before the suction nozzle acts to adhere the packaging sheet to the adhesive tape, so that the air suction is not activated. The packaging sheet is configured to hold the packaging sheet in a state in which the packaging sheet is held down.

[For production]

After being sucked by the suction nozzle and transported and supplied from the storage section to a predetermined position in the packaging work section, the suction nozzle begins to descend.
When the suction nozzle is halfway down, air suction to the suction nozzle is stopped. Even if the suction action stops, the packaging sheet will continue to descend at the predetermined position, so it will not deviate significantly from the packaging position, and will be pressed against the adhesive tape in a flat state without local convex deformation caused by air suction force. It will be glued.

Also, at this time, if the air suction for fixing and supporting the adhesive tape is also stopped, there will be no convex deformation of the adhesive tape itself due to the air suction force, and the adhesive will work with both the packaging sheet and the adhesive tape in a flat state. will be held.

〔Effect of the invention〕

As a result, the adhesive tape can be attached to the packaging sheet in a flat state, and the packaging sheet and adhesive tape do not bend or wrinkle after the packaging process is completed, improving the quality of the finished product. Ta.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIGS. 8 and 9 show a packaging device for wrapping an article (C) such as lettuce with a packaging sheet (1). This packaging device includes a storage section (A) that stores a large number of packaging sheets (1) in a stack, and wraps an object (C) in the packaging sheets (1) that are transferred and supplied one by one from the storage section (A). It consists of a packaging work section (B), a sheet feeding device (2) for transporting and supplying the packaging sheets (1) one by one from the storage section (A), and a sheet feeding device (2) for loading the supplied packaging sheets (1) from above. A holding mechanism (3) that holds and holds the packaged object (C) held from below, and a wrapping guide that folds each end of the packaging sheet (1) over the held packaged object (C). a wrapping mechanism (4) that feeds and supplies the adhesive tape (5) for pasting and fixing the packaging sheet (1) after the wrapping operation; It is equipped with a holding device (7) and the like to prevent the package (C) from floating up.

As shown in FIG. 5, the holding mechanism (3) includes a receiving stand (8) that receives and supports the object to be packaged (C), and also swings up and down to hold the object to be packaged (C). It is equipped with a pair of left and right holding arms (9) that hold the
, (9) are configured to be swing-driven between a downward retracting position and an upward swinging working position by an electric motor (10) which can be rotated in forward and reverse directions. That is, the electric motor (10)
The balance swinging arm (
12〉, each holding arm (9), (
9), the swinging drive is performed. Further, the electric motor (10) is configured to interlock with and drive, via a link mechanism (16), a presser roller (15) for pressing and tensioning one end of the packaging sheet (1).

As shown in FIGS. 3 and 4, the wrapping mechanism (4) guides each end of the packaging sheet (1) by folding it onto the packaged object (C) held by the holding mechanism (3). 4 wrapping tools (17a) and (17b) that hold the

(17c), (17d), and each wrapping tool is equipped with a forward/reverse electric motor (18a), (18b), (18c),
(18d), the packaging sheet (1) is sequentially folded and guided along the surface of the object (C) to be packaged. Each wrapper has a first support arm (20) pivoted at the tip of a drive arm (19) that is swing-driven in a certain range by each electric motor, and a first support arm (20)
a second support arm (21) is pivotally supported at one end of the second support arm (21), and
A guide roller (22) is attached to the tip of the second support arm (21).
each support arm (20), (
21) is rotatably biased in the direction toward the packaged body. Further, a cam roller (23) is provided on the other end side of the second support arm (21).
), and this cam roller (23) supports the drive arm (
19) is guided by the cam surface (24), and each guide roller (22) is configured to be guided and driven substantially along the surface of the packaged object (C). In addition, in the figure (SW)
is a limit switch for timing control of each electric motor.

The presser device (7) is driven by a presser arm (7a) elastically biased downward or by an electric motor (25).
It is configured to move vertically as well as horizontally, and is configured to press the object (C) to be packaged in accordance with the above-mentioned wrapping operation.

The tape feeding mechanism (6) has a tape feeding opening (6a
), the adhesive tape (5) cut into predetermined lengths is fed out with the adhesive surface facing upward;
As shown in the figure, when unwinding the adhesive tape (5),
A bending roller (6b) is provided to bend the paper into a letter shape, thereby preventing it from curving in an arc shape in the longitudinal direction. still,
Since the structure is such that the adhesive tape (5) wound into a roll is installed in the lower position, when installing a new tape, as shown in Figure 6, the horizontal axis center (P,
) is designed to be performed by rotating it around. Further, the adhesive tape (5) that has been fed out is suctioned by air suction to a tape suction device (40) attached to the wrapping device (17d) that operates fourth, and is configured to be fixed in position.

Next, the sheet feeding device (2) will be explained.

As shown in FIG. 9, guide rails (26) extend from both left and right sides of the storage section (A) and the packaging section (B).
, (26) and endless rotating chain (27), (27)
and both guide rails (26).

(26) guided by a rotating chain (27);
The supply transfer section (27) slides and moves by the drive of (27).
8) in preparation. The supply transfer unit (28) extends between a pair of support members (29), (29) movably connected to each rotary chain (27), (27), and connects the sprocket axis of the rotary chain (27). The U-shaped arm (30
) are constructed and connected, and suction nozzles (31) for suctioning the packaging sheet (1) are installed at two intermediate positions on this arm (30).

(31) is provided. Each of the rotation chains (27).

(27) is configured to be driven in the forward and reverse directions by the drive of the forward and reverse electric motor (32), and is equipped with a potentiometer (PM) for detecting the amount of movement of the supply transfer section (28). Further, the rotation fulcrum of the arm (30) is equipped with a forward/reverse electric motor (33) that slides integrally, and the suction nozzle (3) is driven by the electric motor (33).
1) is retracted upward and the packaging sheet (1) is stored.
) and the position where the adsorption action is applied.

Furthermore, the storage section (A) has three storage devices (34) each for storing three types of packaging sheets (1) of different sizes in a stacked manner.
are arranged one on top of the other in an inclined position and with their front ends at approximately the same height.

Furthermore, an air blowing nozzle (35) is provided on the upper side of each storage device (34) in the transport direction for blowing out air for sheet separation during suction action. the suction nozzle (31);
(31) has an open tip as shown in Figure 1,
This opening is connected to the suction device (
(not shown).

The operation of the sheet feeding device (2) configured as described above will be explained. As shown in Figure 2, the suction nozzle (31
) is in the upper retracted position, the electric motor (33) is activated, and the suction nozzle (31) contacts the upper surface of the front end side of the packaging sheet (1) and suctions it by air suction force. At this time, the packaging sheet (1) is bent and deformed in the suction action section due to the air suction force (see FIG. 2(A)).

Then, when a negative pressure state within the suction pipe (36) is detected by a pressure sensor (not shown), the electric motor (
33) drive or stop. After that, the electric motor (33)
The suction nozzle (31) moves upward in the suction state by rotating in the opposite direction, and the chain motor (32) is driven to transport the packaging sheet (1) to a predetermined position in the working section (B). Next, the suction nozzle (31) descends to attach the packaging sheet (1) to the adhesive tape (5) being fed out. At this time, immediately before adhesion to the adhesive tape (5), stop the air suction to the suction nozzle (3) (see Figure 2 (0)), and leave the suction nozzle (31) on one side in the state where air suction is not activated. ) presses the upper surface of the sheet (1) where the tape is attached (see Fig. 2 (c)). still,
At this time, air suction for fixing the position of the adhesive tape (5) is also stopped.

In this way, bending deformation caused by the suction action is prevented from remaining even after the packaging operation is completed.

Note that although reference numerals are written in the claims section for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the packaging device according to the present invention, in which Fig. 1 is a sectional view of a suction nozzle, Fig. 2 is a diagram showing a pressing operation procedure,
Figures 3 and 4 are side views of the wrapping mechanism, Figure 5 is a side view of the holding mechanism, Figure 6 is a side view showing the support state of the tape feeding device, and Figure 7 is a tape folding part of the tape feeding unit. The figure showing the bent state, FIG. 8 is an overall plan view, and FIG. 9 is an overall side view. (1)...Sheet, (2)...Feeding device, (5)...Adhesive tape, (31)...
・・Suction nozzle, (A) ・・Storage section, (B)・
...Packaging work department.

Claims (1)

[Claims] 1. Packaging sheets (1) stacked and stored in the storage section (A)
The uppermost one is an air suction type suction nozzle (31).
A supply device (2) is provided which adsorbs the sheet and transfers the sheet to the packaging work section (B). A packaging device configured to adhere the packaging fixing adhesive tape (5) supported in a fixed position by the pressing force of the suction nozzle (31), wherein the packaging sheet is attached by the suction nozzle (31). Immediately before adhesion to the adhesive tape (5) in (1), air suction to the suction nozzle (31) is stopped, and the packaging sheet (1) is held in a state in which air suction is not applied. packaging equipment. 2. The packaging apparatus according to claim 1, wherein the packaging apparatus is configured to also stop air suction for positionally fixing and supporting the adhesive tape (5) immediately before the adhesive action is applied to the adhesive tape (5).