JPH04142210A - Wrapping device - Google Patents

Abstract

PURPOSE:To improve working efficiency by a method wherein timing for driving of each of devices is set rationally without accelerating operating speeds of each of wrapping apparatuses and a pressing device. CONSTITUTION:A first wrapping apparatus 17a and a second wrapping apparatus 17b fold the side end of a wrapping sheet 1 with an object C to be wrapped kept in holding. A third wrapping apparatus 17c folds another side end of the wrapping sheet over the already folded side end while the same is being pressed by the second wrapping apparatus 17b, and stops the wrapping motion at a specified position over the center of the object C. A pressing device 7 is set in a timing so that the said device starts lowering motion for pressing while the third wrapping apparatus 17c is still working. At the same time when the third wrapping apparatus 17c reaches a specified position, guide rollers 22 attached to the second wrapping apparatus 17b separate from the object C and the third wrapping apparatus 17c starts to retreat in approximately simultaneous timing therewith. With a little difference in timing, the second wrapping apparatus 17b follows in retreating, leaving the pressing device 7 kept in pressing operation. After this, a fourth wrapping apparatus 17d is engaged in guiding of the sheet as well as in sticking of an adhesive tape 5 to the wrapped object. Then the pressing device 7 moves to the third and the fourth processes and releases the wrapped object C to the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for packaging articles, such as lettuce and other spherical vegetables, using a packaging sheet. A plurality of packaging sheets can be freely switched between an active position in which each side edge of the packaging sheet is sequentially folded and guided to press and support each side edge of the packaged object, and a non-active position in which the side edge is retreated to the rear. The present invention relates to a packaging device that is provided with a wrapping device and is equipped with a presser device that presses and supports the object to be packaged from above when a predetermined wrapping tool guides the packaging sheet to a predetermined location.

[Conventional technology]

In the above-mentioned packaging device, conventionally, when the predetermined wrapping device operates to fold and guide the packaging sheet, another wrapping device that operates before it operates to maintain the operating posture and guide the folding state of the sheets. The device is configured so that the predetermined enclosing device can be operated without loosening, and after the enclosing device reaches a predetermined position, another enclosing device is switched to a non-operating position and operated, and the switching device is It is thought that the timing was set so that the presser operation by the presser device was started after the machine had broken.

[Problem to be solved by the invention]

The above-mentioned conventional structure allows the sequential folding and guiding operation of the packaging sheets by each wrapping tool in a state where the sheets do not loosen.
In addition, it is possible to carry out the packaging operation smoothly without lifting of the packaged items.

However, in the case of the above conventional structure, the operation of the predetermined wrapping device, the presser device, and another wrapping device is performed individually and sequentially, so the overall wrapping operation time becomes long. However, there was a drawback that the work efficiency decreased.

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

[Means for Solving the Problems] A characteristic configuration of the present invention is that in the packaging apparatus described at the beginning, a wrapping device that operates before the predetermined wrapping device is in a sheet presser supporting state, and The presser device is configured to start lowering the presser foot before the wrapping tool reaches the predetermined location, and when the lowering operation of the presser foot stops, the wrapping tool and the wrapping tool operating earlier are configured to The drive timing is set so that the position is sequentially switched to the non-operating position.

[For production]

After the preceding wrapper guides the packaging sheet and reaches the presser support position, the presser device starts its downward movement while the predetermined wrapper is performing the sheet guiding operation.
When the wrapper reaches the predetermined location, it reaches the presser action position almost simultaneously or with a slight time difference. Then, when the presser foot lowering operation is stopped, that is, when the presser foot is set to the working position, both of the wrapping tools are switched to the non-working position with a slight time difference and are retracted. In this way, even if the operating timings of each wrapping device and the holding device overlap, the movement locus of each wrapping device will follow and intersect the surface of the object to be packaged, and the movement of the holding device will be the same. Since the trajectory is along the vertical direction, in order to avoid collisions at these intersections, it is only necessary to provide a slight timing shift.

〔Effect of the invention〕

Therefore, according to the present invention, the waiting time of each device in each process can be shortened by rationally setting the drive timing of each wrapping tool and presser device without increasing their operating speeds. This makes it possible to shorten the overall packaging work time and improve work efficiency without causing a deterioration in the quality of the packaging finish.

〔Example〕

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

Figures 12 and 13 show items to be packaged, such as lettuce (C)
1 shows a packaging device for packaging products 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). Wrapping mechanism (4), after wrapping operation, wrapping sheet (1)
a tape feeding device (6) for feeding and feeding an adhesive tape (5) for adhering and fixing; and a presser device (7) for preventing the packaged object (C) from rising during the wrapping operation. etc. are provided.

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. In other words, the electric motor (lO)
The balance swinging arm (
Each holding arm (9), (
9), the swinging drive is performed. Further, the electric motor (lO) is configured to interlock with and drive a presser roller (15) for pressing one end of the packaging sheet (1) and applying tension via a link mechanism (operation 6).

As shown in FIG. 3, FIG. 4, and FIG. Four wrappers (17a) and (17b) that fold and guide and hold the parts.
, (17c), (17d), and each wrapping tool is equipped with a forward/reverse electric motor (18a), (18b), (18c).
) and (18d), the packaging sheet (1) is sequentially folded and guided along the surface of the object (C) to be packaged. Each enclosing device has a first support arm (20) pivotally supported at the tip of a drive arm (19) that is oscillated within a certain range by each electric motor, and a The second support arm (21) is pivotally supported, and a guide roller (2
2), each of the support arms (20);
(21) is rotatably biased in the direction of the packaged object. Moreover, a cam roller (
23), and is guided by the cam surface (24) as the cam roller (23) or the drive arm (19) rotates,
Each guide roller (22) is configured to be guided and driven substantially along the surface of the article to be packaged (C). In addition, in the figure (S
W) is a limit switch for timing control of each electric motor.

The guide roller (
22) is divided into left and right halves, and between them is provided a blow nozzle (25) that bends and guides the sheet end side, which guides the roller (22), toward the packaged object (C). This blow nozzle (25) is connected to the first wrapping tool (17a
), air is blown along with the wrapping operation of the second wrapping tool (
17b), the air blowing is stopped after the air blower operates to the halfway position.

The presser device (7) is configured such that a presser arm (26) elastically biased downward moves vertically and horizontally by driving an electric motor (27), and the presser arm (26) is elastically biased downward and moves vertically and horizontally, and the presser arm (26) is moved vertically and horizontally by driving an electric motor (27). It is configured to hold down the object (C). Specifically, as shown in FIGS. 7 and 8, the presser device (7) is provided on the rear side of the second wrapper (17b),
A lateral moving part (29) is supported so as to be slidable in the direction toward the center of the working part with respect to a support frame (28) erected from the machine base, and a horizontal moving part (29) is supported vertically so as to be freely movable up and down with respect to this lateral moving part (29). Supports the moving part (30), and this vertical moving part (3
0), the presser arm (26) is attached. The lateral movement part (29) is driven by a drive pin (31) rotated by an electric motor (27) or a vertical engagement recess (32).
The vertical moving part (30) is driven to move laterally by abutting on the
The drive pin (31) is driven while being brought into contact with the engaging part (33). A guide hole (3) connected to the engagement recess (32)
4) is a drive pin (
31). The presser device (7) configured as described above has a first step in which the presser arm (26) moves laterally from a standby position in the rear and upper part to above the object to be packaged (C), and then moves downward to move the object to be packaged (C) laterally. C) A second step of pressing down, a third step of moving backward and retracting, and a fourth step of moving upward toward the standby position are sequentially repeated.

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

As shown in FIGS. 12 and 13, guide rails (35), (35) and an endless rotating chain (36) are installed on both left and right sides of the storage section (A) and the packaging section (B).
, (36), and both guide rails (
35), guided by (35), rotating chain (
36) and an adsorption/transfer mechanism (37) that slides when driven by (36). Adsorption transfer mechanism (37)
is a pair of supporting members (38), (38) movably connected to each rotary chain (36), (36), at a horizontal position approximately on the same level as the sprocket axis of the rotary chain (36). A U-shaped arm (39) that can freely swing around the axis (Pl) is constructed and connected, and suction nozzles (39) for suctioning the packaging sheet (1) are installed at two intermediate positions of this arm (39).
40) and (40). Each of the rotating chains (36), (36) is configured to be driven in the forward and reverse directions by the drive of the forward and reverse electric motor (41), and the suction and transfer mechanism (
39) for detecting the amount of movement of the potentiometer (P
M) is provided. Further, a forward/reverse electric motor (4) that slides integrally is provided at the rotation fulcrum of the arm (39).
2), and is configured so that the suction nozzle (40) can be switched and swung between a position where it retracts upward and a position where it suctions the packaging sheet (1) to be stored when driven by the electric motor (42). There is.

Furthermore, the storage section (A) has three storage devices (43) 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.

The suction nozzle (40) is supported by a support bracket (44) attached to the arm (39>) so as to be elastically retractable, and is communicatively connected to a suction device (not shown) via a suction vibrator (45).

As shown in FIG. 10, the suction nozzle (40) has a large-diameter cylindrical member (40b) made of a rubber material fitted onto the tip of a supporting cylindrical member (40a), and a large-diameter cylindrical member (40b).
A steel material (40C) is provided in the opening portion of 40b) to prevent the sheet from bending when the sheet is sucked.

A saucer (50) having a cross shape in plan view is provided at the upper center of the holding mechanism (3), and the saucer (50) holds the packaged material around the horizontal axis (P2) at the lower position on the downstream side in the sheet feeding direction. thing(
C) It is configured to be able to freely switch and swing between a support position in which it receives and supports the object and a discharge position in which it swings outward and upward.

That is, as shown in FIG. 9, the L-shaped arm (51) integrally connected to the saucer (50) is pivotally supported on the frame (52), and the middle part of the arm (51) and the presser device (
7) is interlocked and connected to the drive arm (53) provided in the drive arm (53) via a wire (54). The drive arm (53) is
The movement of the drive bin (31) in the fourth step of the presser device (7) contacts and swings the tray (50) to quickly switch it from the support position to the release position, thereby removing the packaged items ( C) is configured to emit outward.

Next, the installation structure of the tape feeding device (6) will be explained. The tape feeding device (6) is configured to feed out a predetermined amount of the adhesive tape (5) for packaging for each packaging operation as described above.

It is disposed on the outer side of the wrapping device (17d) that operates fourth, and extends toward the center of the working section (B), that is, toward the place where the article to be packaged (C) is placed. It is installed so that its position can be adjusted freely along the line. More specifically, as shown in FIG. 6, four rollers (
57) is attached and supported so as to be slidable, and an operating lever (59) which can be elastically deformed in the direction of movement is engaged with a locking tool (58) connected from a fixed frame (55) for positioning. It is configured. The locking tool (5
8) has three locking recesses (60a), (6C1b),
(60c), and are set so that the position of the feeding tape (5) can be switched depending on the packaging sheet (1) of three different sizes.

Further, in conjunction with the above-mentioned position adjustment of the tape feeding device (6), the suction starting end position of the sheet feeding device (2) is changed and adjusted, and the left and right spacing between the left and right suction nozzles (40), (40) is changed. There is. To explain in detail, the engaging recesses (60a) and (60c) on both end sides of the locking tool (58)
) are provided with limit switches (61a) and (61b) (an example of detection means) for detecting the presence of the operating lever (59), and the control device ( (not shown) is connected to the sheet feeding device (
The supply drive motor (41) of 2) is controlled to change the adsorption start position.In other words, the limit switch on the center side (
61a) is detected, it is determined to be the small side seat position, if the opposite limit switch (61b) is detected, it is determined to be the large side seat position, and if neither is detected, the middle side seat position is determined. I judge that.

Further, each of the suction nozzles (40), (40) has a support shaft (
62), and is supported so as to be slidable in the horizontal direction.
Balance arm (63) and each rod (64), (64)
They are linked so that they slide in a contradictory manner. The balance arm (63) is interlockingly connected to the tape feeding device (6) via a wire (65), and is connected to the tape edge height device (6) via a wire (65).
Corresponding to the position of (6), left and right suction nozzles (40), (4)
0) or slide.

A tape support (66) for placing and supporting the adhesive tape (5) is placed below the tape feeding portion of the tape feeding device (6).
), this tape support (66) is provided with a support arm (
A roller (68) is attached to the tip of the roller (67) so as to be able to swing up and down and be biased downward.
However, the plate-shaped guide member (69) on the tape edge heightening device (6) side
) It is configured to be positioned by engaging with the hook portion (69a) at the lower end.

The roller (68) is formed to have a smaller diameter on the central portion side in the axial direction, and is configured so that it can also be positioned in the left-right direction by engagement with the guide member (69). The tape support (66) also includes a tape holding member (70) that can be freely switched between a state in which the adhesive tape (5) and the packaging sheet (1) are held together and supported under pressure, and a state in which the pressure is released. )
is provided in a supporting action position in a spring-biased state and can be freely driven and released by the electric motor (10).

As explained above, since the packaging device is provided with a tape edge height device (6) whose position can be freely adjusted according to the size of the packaging sheet (1), the tape can be fed out regardless of the size of the sheet. It is possible to keep the amount constant and supply it in an appropriate state.

Next, the operating procedure of the wrapping mechanism (4) and the holding device (7) will be explained.

As shown in FIG. 1, first, the first wrapping tool (17a ) or the side edge of the sheet and then guide the second
The wrapper (17b) bends and guides the side edge of the sheet.

While this second wrapping tool (17b) is in the sheet holding position, the third wrapping tool (17c) located on the right side folds and guides the side edges of the sheet 1 (see Fig. 1 (I)). )reference)
.

At this time, the third wrapping tool (17c) always
) The drive stroke is set so as to stop at a predetermined upper central location.

Then, as shown in FIG. 2, a third wrapping tool (17c
) is in the middle of the guiding operation, the timing is set so that the presser foot lowering operation of the presser device (7), ie, the second step, starts. The presser arm (26) is formed in a fork shape, and operates as a presser while straddling the guide roller (22) of the third wrapper (see FIG. 1(b)).

Next, at the same time that the third wrapping tool (17c) reaches the predetermined location, the second wrapping tool (17b) moves its guide roller (2
2) From the sheet holding position, the sheet protrudes further outward and is separated from the packaged object (C). Moreover, when the separation operation is completed, the third wrapping tool (17c) begins to retire to the non-working position almost at the same time, and after that, after a slight time lag, the second wrapping tool (17b) starts to retire to the non-working position. and begins to retire (
(See Figure 1 (c)). At this time, since the presser device (7) maintains the presser action, the presser arm (26) is formed into a U-shape in plan view so as not to obstruct the retracting operation of the second wrapper (17b). Yes (see Figure 8).

Thereafter, after the fourth wrapping tool (17d) performs sheet guiding and wrapping and pasting with the adhesive tape (5), the presser device (7) moves to the third and fourth steps, and as described above, The packaged object (C) is released and the packaging operation is completed.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of the packaging device according to the present invention, with FIG. 1 showing a wrapping procedure, FIG. 2 a timing chart, FIGS. 3 and 4 a side view of the wrapping mechanism, and FIG. 5. 6 shows the drive system of the holding mechanism, FIG. 6 is an exploded perspective view of the tape feeding device casting part, FIG. 7 is a side view of the presser device, FIG. 8 is an exploded perspective view of the presser device, and FIG. 9 is the receiving tray. Diagram showing the drive system, 1st
0 is a sectional view of the suction nozzle, FIG. 11 is a perspective view of the tape support, FIG. 12 is an overall plan view, and FIG. 13 is an overall side view. (1)...Packaging sheet, (7)...Press device, (17a), (17b), (17c),
(17d) --- Wrapping tool, (C) --- Item to be packaged.

Claims (1)

[Claims] An operating position in which each side edge of the packaging sheet (1) is successively folded and guided to press and support each side edge of the packaged item (C) placed on the packaging sheet (1); , a plurality of wrapping devices (17
a), (17b), (17c), and (17d) are provided, and a predetermined wrapping tool (17c) is attached to the packaging sheet (
1) is equipped with a presser device (7) that presses and supports the object to be packaged (C) from above when the object (C) is guided to a predetermined location, and is activated before the predetermined wrapping device (17c). The wrapping tool (17b) is in a sheet presser supporting state,
Further, the presser device (7) is configured to start the presser lowering operation before the predetermined wrapping tool (17c) reaches the predetermined location, and when the presser foot lowering operation is stopped, the predetermined wrapping A packaging device in which the driving timing is set so that the wrapping tool (17c) and the previously activated wrapping tool (17b) are sequentially switched to a non-operating position.