JPH04142209A - Wrapping device - Google Patents

Abstract

PURPOSE:To make an adhesive tape undetachable from a position for sticking during a wrapping sheet is guided by providing a tape holding mechanism which holds the adhesive tape and the wrapping sheet together and is capable of making shifts between a press-and-hold position and a position where the pressing is released. CONSTITUTION:A tape support device 66 is provided to the underside of a position wherefrom the tape is unwound of a tape unwinding device 6. A tape pressing member 70 which holds the adhesive tape and a wrapping sheet together and is capable of making shifts between the pressing position and a releasing position is provided to a position where supporting is made so that it can optionally be released from the driving position, and a tape holding mechanism (D) is constructed of the tape support device 66 and the tape pressing member 70. As an arm 11 pivots at an angle of 90 deg. from a waiting position, pressing rollers 15 work, making the pressing member 70 work on the pressing operation. As the arm pivots further at an angle of 90 deg., a holding mechanism 3 works with the pressing rollers 15 and the pressing member 70 kept for working, and moves following the guiding operation made to the wrapping sheet 1 by a fourth wrapping apparatus 17d, and the guiding is continued to a position where the adhesive tape is stuck to the sheet with tension given to the side end of the sheet and the adhesive tape 5 kept in holding.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for packaging items such as lettuce and other spherical vegetables using a packaging sheet. A plurality of wrapping tools are provided to cover and guide the packaging sheet onto the object to be packaged, which is placed from above the packaging sheet, and an adhesive tape for wrapping the packaging is repeated on the lower surface of one side end of the packaging sheet. The present invention relates to a packaging device equipped with a tape feeding device.

[Conventional technology]

Conventionally, in the above-mentioned packaging apparatus, a support part that receives and supports the adhesive tape is provided in a state that is interlocked with the wrapping tool that operates last, and the packaging sheet is held together by suction force generated by air suction on this support part. A structure in which the adhesive tape attached to the side edge is held by suction has been considered (
For example, see Japanese Patent Application No. 2-40391 filed by the present applicant)
.

[Invention or problem to be solved]

The above-mentioned conventional structure eliminates the possibility that the adhesive tape becomes free when the side edge of the sheet to be folded at the end is covered and guided, and the adhesive tape is erroneously attached to a different location from the intended attachment location, and By effectively utilizing the structure of the support portion to guide the sheet while applying tension to the sheet side edge, it is possible to prevent the sheet from becoming loose.

However, according to the above conventional structure, since it is an air suction type suction fixing structure, there is a problem between the adhesive tape and the suction point.
If there are small dust particles or gaps caused by bending, the suction force will be weakened, and there is a risk that the adhesive tape will separate from the suction area during sheet guidance, so there is room for improvement.

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

[Means to solve the problem]

A characteristic configuration of the first invention is that, in the packaging device described at the beginning, the adhesive tape fed out from the tape feeding device and the packaging sheet can be freely switched between a state in which the adhesive tape fed out from the tape feeding device and the packaging sheet are held and supported under pressure, and a state in which the pressure is released. The point is that a tape holding mechanism is provided. The characteristic configuration of the second invention is that the tape holding mechanism is constituted by a pressing member having a plurality of projections and depressions formed on the clamping portion, and a guide member having projections and depressions that enter into the projections and depressions of the pressing member and are guided. There is a certain point. A characteristic feature of the third invention is that the pressing member is pressed by the biasing force of a spring, and is released from the pressing by a drive operation force. A characteristic configuration of the fourth invention is that the pressing member is configured to be driven in conjunction with a pressing operation drive mechanism of a pressing tool that presses and holds another sheet end portion different from the portion held by the pressing member. be.

[For production]

■ ¥&1 According to the structure of the invention, the adhesive tape and the packaging sheet are supported in a mechanically pressed state by the tape holding mechanism, so the packaging sheet or adhesive tape is not affected by bending or dust etc. This means that it can be held in place reliably. Furthermore, when pasting the package, releasing the pressure allows smooth pasting.

■ According to the configuration of the second invention, in addition to the above-mentioned effect (■), the adhesive tape and the packaging sheet are held and supported by the pressing member and the guide member in a state in which the concave and convex portions are engaged with each other, so that the adhesive tape and the packaging sheet can be securely held at multiple locations. Become something.

(2) According to the configuration of the third invention, in addition to the above-mentioned effects (1) or (2), the clamping force of the adhesive tape and the packaging sheet is performed by a spring force, so that the clamping force is always maintained constant.

■ According to the configuration of the fourth invention, in addition to any one of the above-mentioned functions (■) to (2), the pressing member is driven using the drive mechanism of the existing pressing tool for holding the packaging sheet presser, so that a dedicated There is no need to provide a drive system, and the structure does not become significantly complicated.

〔Effect of the invention〕

Therefore, according to the present invention, it is possible to perform the wrapping work smoothly while reliably maintaining the state in which the adhesive tape for packaging wrapping is stuck to one end of the packaging sheet, and the adhesive tape can be applied during the wrapping operation. There is less risk of problems such as becoming free and accidentally sticking to a place other than the intended place, and the wrapping work can be done smoothly and reliably.

〔Example〕

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

Figures 10 and 11 show a packaged article such as lettuce (C
) is shown for packaging with a packaging sheet (1). This packaging device has a storage section (A) that stores a large number of packaging sheets (1) in a stacked manner, and a packaging sheet (1) that is transferred and supplied one by one from the storage section (A) to a packaged object (C).
It consists of a packaging section (B) that wraps the
A sheet feeding device (2) for transporting and feeding packaging sheets (1) one by one from above, and holding the packaged object (C) placed from above the supplied packaging sheet (1) from below. a holding mechanism (3) that wraps and guides each end of the packaging sheet (1) over the held object (C), a wrapping mechanism (4) that wraps and guides the held object (C); (1
) and a tape feeding device (6) for feeding and feeding the adhesive tape (5) for adhering and fixing the material (C), and a presser device (7) for preventing the object to be packaged (C) from rising during the wrapping operation. ) etc. are provided.

As shown in FIG. 3, 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 oscillated between a downward retracted position and an upward swiveling active position by an electric motor (10) which can be rotated in forward and reverse directions. In other words, the balance swinging arm (1
2), each holding arm (9), (9
), the swinging drive is performed. Further, the electric motor (10) is configured to interlock and drive a presser roller (15) (an example of a pressing tool) for pressing and tensioning one end of the packaging sheet (1) via a link mechanism (16). be.

As shown in FIGS. 1, 2, and 10, the wrapping mechanism (4) wraps each end of the packaging sheet (1) around the packaged object (C) held by the holding mechanism (3) Four wrapping tools (17a), (17b), which fold and guide and 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 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.
A second support arm (21) is pivotally supported at one end of the second support arm (20), and a guide roller (22) is mounted at the tip of the second support arm (21).
), each of the support arms (20);
(21) is rotatably biased in the direction of the packaged object. or,
A cam roller (2
3), and this cam roller (23) is guided by the cam surface (24) as the drive arm (19) rotates, and each guide roller (22) or almost the surface of the packaged object (C) It is configured to be guided and driven along. In addition, in the figure (SW
) is a limit switch for timing planning of each electric motor.

The guide roller (
22) is divided into left and right halves, and a blow nozzle (25) is provided between them to bend and guide the sheet end side guided by 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) is configured to stop blowing air after it operates to an intermediate 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. 5 and 6, 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 driving pin (31) is driven by being brought into contact with the locking 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 at the rear and upper side to above the object to be packaged (C), and then moves downward to control the object to be packaged (C). 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. 10 and 11, guide rails (35), (35) and an endless rotating chain (36) are installed on both left and right sides of the storage section (A) and packaging section (B), respectively.
, (36), and both guide rails (
35), guided by (35), rotating chain (
36), is equipped with 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), (40) is provided. 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) Potentiometer (PM) to check the amount of movement
). Further, a forward/reverse electric motor (42) that slides integrally is provided at the rotation fulcrum of the arm (39).
), and is configured to swing and switch between a position where the suction nozzle (40) is retracted upward and a position where it suctions the stored packaging sheet 1) by driving the electric motor (42). .

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.

As shown in FIG. 8, the suction nozzle (40) is supported by a support bracket (44) attached to the arm (39) so as to be elastically retractable, and connected to a suction device (not shown) via a suction pipe (45). is connected to.

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. 7, 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 (S3) 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. To be more specific, as shown in FIG. 4, 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), (60b),
(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 engagement recesses (60a) and (60c) on both end sides of the engagement tool (58)
) are provided with limit switches (61a) and (61b) for detecting the presence of the operating lever (59), and a control device (not shown) controls the seat control based on the signals from each switch (61a) and (61b). The supply drive motor (41) of the supply device (2) is controlled to change the suction start position. In other words, if the limit switch (61a) on one center side is in the detection state, it is determined to be the small side seat position, and if the limit switch (61b) on the opposite side is in the detection state, it is determined to be the large side seat position. If it is not detected, it is determined that the seat is in the middle seat position.

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 interlocked and connected to the tape feeding device (6) via a wire (65).
Corresponding to the position of (6), left and right suction nozzles (40), (4)
0) is configured to 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 feeding device (6) side
) It is configured to be positioned by engaging with the hook portion (69a) at the lower end. The tape support (66) also includes a tape pressing 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 driven and released by the electric motor (10). The tape support (66) and tape pressing member (70) constitute a tape holding mechanism (D). Specifically, as shown in FIG. 7, the pressing member (70)
is pivotally supported around the horizontal axis (P3) relative to the tape support (66), and is urged toward the tape support (66) by a helical spring (71). Further, the pressing member (70) is composed of a stepped roller having a plurality of circumferential grooves, and the tape support (66) is provided with a plurality of guide plates (72) that are guided into each of the circumferential grooves. There is,
The adhesive tape (5) and the packaging sheet (1) have a pressing member (
70) and each guide plate (72) so as to be held in the shape of a corrugated plate.

As shown in FIG. 3, the pressing member (70) is driven to release the pressing by the electric motor (10) for driving the holding mechanism (3).
), and this electric motor (10) is also used to press and hold the pressing roller (15) at a diagonal position of the packaging sheet (1) with respect to the area where the adhesive tape (5) is fed out prior to the wrapping operation. ) is also used for driving. Arm (11) rotated by electric motor (10)
The holding mechanism (3) driving rod (73) and the pressing roller (15) driving rod (74) are interlocked and connected by means of bottle elongated holes, and are connected to each other via the pressing member (70) and the wire (75). They are interlocked and connected, and each connection point is set to correspond to the operating timing. That is, when the arm (11) rotates approximately 90 degrees counterclockwise from the standby state shown in FIG. 3, the pressing roller (15) operates and at the same time the pressing member (70) operates to press. Furthermore, the arm (11
) rotates approximately 90 degrees, the holding mechanism (3) operates while the presser roller (15) and the pressing member (70) remain in operation.

a support arm () to which the tape support (66) is attached;
67) is rocked and biased in the direction away from the fourth wrapping tool (17d), and moves as the fourth wrapping tool (17d) guides the packaging sheet (1), and the sheet side edge While applying tension to the adhesive tape (5), the adhesive tape (5) is held and guided to the area where it is to be pasted. The drive timing is set by a limit switch (SW) so that the tape pressing operation is canceled near the end of the sheet guiding operation of the fourth wrapper (17d).

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 drawings]

The drawings show an embodiment of the packaging device according to the present invention, and FIG.
Figure 2 is a side view of the wrapping mechanism, Figure 3 is a diagram showing the interlocking drive system, Figure 4 is an exploded perspective view of the tape feeding device installation section,
Fig. 5 is a side view of the presser device, Fig. 6 is an exploded perspective view of the presser device, Fig. 7 is a diagram showing the tray drive system, Fig. 8 is a sectional view of the suction nozzle, and Fig. 9 is a diagram of the tape holding mechanism. Perspective view, 10th
The figure is an overall plan view, and FIG. 11 is an overall side view. (1)...Packaging sheet, (6)...Tape feeding device, (10)...Drive mechanism, (1
5) Pressing tool, (17a), (17b),
(17C), (17d) --- Wrapper, (
70)...Press member, (71)...Spring, (72)...Guide member, (A)...
・Sheet storage section, (C) ・Package/packaged items, (D) ・
...Tape holding mechanism.

Claims (1)

[Claims] 1. The packaging sheet (1) supplied from the sheet storage section (A)
) A plurality of wrapping tools (17
a), (17b), (17c), and (17d), and a tape feeding device (6) that feeds out an adhesive tape (5) for pasting packaging onto the lower surface of one end of the packaging sheet (1).
), the adhesive tape (5) fed out from the tape feeding device (6) and the packaging sheet (1) are both clamped and supported under pressure, and a state where the pressure is released. A packaging device equipped with a tape holding mechanism (D) that can be freely switched between. 2. The tape holding mechanism (D) includes a pressing member (70) in which a plurality of concave and convex portions are formed on the clamping portion, and this pressing member (70).
2. The packaging device according to claim 1, further comprising a guide member (72) formed with unevenness that enters and is guided by the unevenness of (0). 3. The packaging device according to claim 1 or 2, wherein the pressing member (70) is pressed by a biasing force of a spring (71) and released by a drive operation force. 4. The pressing member (76) is driven in conjunction with a pressing operation drive mechanism (10) of a pressing tool (15) that presses and holds another sheet end portion different from the portion held by the pressing member (70). A packaging device according to any one of claims 1 to 3.