JPH04142211A - Wrapping device - Google Patents

Abstract

PURPOSE:To improve work efficiency still more by a method wherein operation for taking one sheet of wrapping sheets out of a sheet-storing section is executed while wrapping operation is in progress, and said sheet is supplied when delivery operation of the wrapping means finishes. CONSTITUTION:Whenever one operator pushes a button of a start switch S0, a wrapping section B and a sheet supply device 2 are put in operation for one cycle. After finishing of said operation, the section and the device are put in waiting positions. When the operator places an object to be wrapped on a receiving stand 8 and then pushes the button of the start switch S0 with the wrapping sheet 1 supplied to the receiving stand 8, wrapping operation in the wrapping section B starts. While the wrapping operation is in progress, operation for taking one sheet of the wrapping sheets 1 to an U-shaped arm 39 out of a sheet-storing section A is executed in the sheet supply device 2. Judgement on whether the sheet is supplied or not can be made according to the information detected by an upper limit switch S12 of a support mechanism 3. When the switch S12 is turned off, the judgement is such that the sheet is being supplied.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention provides a packaging means for packaging an object with a supplied packaging sheet and discharging the object upon completion of packaging; The present invention relates to a packaging device including a packaging sheet supplying means for holding and supplying one packaging sheet from a sheet storage section to the packaging means, and a control means for controlling the operation of the packaging means and the packaging sheet supplying means.

[Conventional technology]

The above-mentioned packaging device is intended to improve work efficiency by automatically wrapping an object to be packaged, typified by spherical vegetables such as lettuce, with a packaging sheet.

Here, when feeding the next packaging sheet to the packaging means upon completion of packaging, after the ejection operation of the packaging means is completed,
It is generally considered that the packaging sheet supply means is configured to hold a single packaging sheet from the storage section, and then to supply the packaging sheet to the packaging means.

[Problem to be solved by the invention]

In the above conventional technology, while the packaging sheet supplying means is performing the operation of holding the packaging sheet and the operation of supplying the held packaging sheet to the packaging means, the packaging means cannot perform the wrapping operation. , there was a risk that the cycle time of packaging work would be relatively long.

An object of the present invention is to eliminate the above-mentioned conventional drawbacks and further improve work efficiency.

[Means to solve the problem]

In order to achieve this object, the packaging device according to the present invention has a characteristic configuration in which the control means operates to hold one packaging sheet from the storage section in the packaging sheet supplying means during the packaging operation of the packaging means. and, upon completion of the discharging operation of the packaging means, is held by the packaging sheet supplying means to execute the packaging sheet supplying operation.

[Function] Since the packaging sheet supplying means holds the packaging sheet during the wrapping operation of the packaging means, the packaging means only needs to operate after the packaging sheet supplying means supplies the packaging sheet after completing the discharging operation. After waiting, the next packaging operation can be started. Therefore, the waiting time of the packaging means can be shortened.

〔Effect of the invention〕

Since the waiting time of the packaging means can be shortened, the cycle time of the packaging operation can be shortened.

Therefore, a packaging device with high working efficiency can be obtained.

〔Example〕

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

FIGS. 4 and 5 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) for stacking and storing a large number of packaging sheets (1), a sheet feeding device (2) as a sheet feeding means for transporting and supplying sheets one by one from the storage section (A), and Packaging work section (B) as a packaging means for wrapping the packaged object (C) with the supplied packaging sheet (1)
The packaging work section (B) includes a holding mechanism (3) that holds and holds the packaged object (C) placed from above the supplied packaging sheet (1) from below; A wrapping mechanism (4) for folding and guiding each end of the packaging sheet (1) over the object to be packaged (C), and a wrapping mechanism (4) for adhering and fixing the packaging sheet (1) after the wrapping operation. Adhesive tape (5)
It is equipped with a tape feeding device (6) for feeding and feeding a tape, a holding device (7) for preventing the object (C) from floating up during the wrapping operation, and the like. In addition, (Bs) and (B4) in Fig. 4 are the nozzles for ear removal, and (Bs) and (B4) in Fig. 5 are ear removal nozzles.
B1) is a separation blow nozzle.

As shown in FIGS. 6 to 8, 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). Equipped with a pair of left and right holding arms (9), (9) for holding and holding C),
The holding arms (9), (9) are configured to be oscillated between a downwardly retracted position and an upwardly swiveling working position by an electric motor (M8) that can be rotated forward and backward. In other words, the lifting member (14), which is vertically slidably driven with respect to the support shaft (13) via the balance swinging arm (12) by the arm (11) that rotates integrally with the electric motor (M8), is attached to each holding arm. (9), Swing drive is performed in conjunction with (9).

Further, the electric motor (M8) is configured to interlock and drive a presser roller (15) for pressing and tensioning one end of the packaging sheet (1) via a link mechanism (16). In the figure, (SIri~(S, ,)) is a limit switch for timing control of the electric motor (M,).

As shown in FIGS. 6 and 7, the wrapping mechanism (4) wraps the packaged object (C) held by the holding mechanism (3).
four first to fourth wrapping tools (17a), (17b) that fold and guide and hold each end of the packaging sheet (1);
), (17c), and (17d), and each wrapping tool sequentially folds back the packaging sheet (1) along the surface of the object to be packaged (C) by a forward/reverse electric motor (M, ) to (M4). It is designed to guide you. Each wrapping tool is attached to a first support arm (20) at the tip of a drive arm (19) that is oscillated within a certain range by each electric motor (Ml) to (M4).
), a second support arm (21) is pivotally supported at one end of the first support arm (20), and a guide roller (22) is supported at the tip of the second support arm (21). Each of the support arms (20) and (21) is biased to rotate in the direction of the packaged object. A cam roller (23) is supported on the other end side of the second support arm (21), and this cam roller (23) is guided by the cam surface (24) as the drive arm (19) rotates. , each guide roller (22) is configured to be guided and driven substantially along the surface of the packaged object (C). In addition, (Sl) to (S,) in the figure
are limit switches for timing control of each electric motor (Ml) to (M4).

The guide roller (22) of the first wrapping device (17a) that operates first is divided into left and right halves, and between them the sheet end side guided by the roller (22) is guided by the object to be wrapped (C). )
A blower nozzle (B2) is provided which is bent and guided toward the side. This blow nozzle (B2) is connected to the first wrapping tool (1
Air is blown in conjunction with the wrapping operation in step 7a), and the air blown is stopped after the second wrapping tool (17b) has been operated to an intermediate position.

As shown in FIGS. 9 to 11, in the presser device (7), a presser arm (26) elastically biased downward moves vertically and laterally by driving an electric motor (M). According to the above-mentioned wrapping operation, the object to be packaged (C
) is configured to operate as a presser. To be more specific, the presser device (7) is provided on the rear side of the second wrapping tool (171), and is slidable in the direction toward the center of the working section with respect to the support frame (28) that is erected from the machine base. Lateral movement part (2
9), and also supports a vertically movable part (30) so as to be vertically movable with respect to this horizontally movable part (29), and the presser arm (26) is attached to this vertically movable part (30).

The lateral movement part (29) is driven by a drive pin (31) rotationally driven by an electric motor (M,) or a vertical engagement recess (29).
32) and is driven to move laterally, and vertically moving part (30
) is driven by abutting and engaging with the driving pin (31) or the locking portion (33). The guide hole (34) connected to the engagement recess (32) allows the drive pin (31) to rotate so as not to move laterally during vertical movement driving. The presser device (7) configured in this manner includes the presser arm (26).
The first step is to move horizontally from the standby position at the rear and upper side to above the packaged object (C), the second step is to move downward and press the packaged object (C), and the third step is to move backward and retreat laterally. , and the fourth step of moving upward toward the standby position are sequentially repeated.

In the figure, (S,.), (S,,) are limit switches for timing control of the electric motor (M,).

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

As shown in FIGS. 4 and 5, 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 (36).
5), (35), and the rotating chain (3
It is equipped with an adsorption transfer mechanism (37) that slides when driven by (6) and (36). The suction transfer mechanism (37) spans a pair of support members (38), (38) which are movably connected to each rotary chain (36), (36), and the sprocket axis of the rotary chain (36). A cone-shaped arm (39) that can swing freely around the horizontal axis (Pl) at approximately the same level as the Pl is connected and installed, and suction nozzles (39) for suctioning the packaging sheet (1) are installed at two intermediate positions of this arm (39). 4
0) and (40). Each rotation chain (
36), (36) are configured to be driven in the forward and reverse directions by the drive of the forward and reverse electric motor (M6), and the suction transfer mechanism (3
9) Potentiometer (PM) for detecting the amount of movement of
, '). Further, the rotation fulcrum of the arm (39) is equipped with a forward/reverse electric motor (M7) that slides integrally, and the suction nozzle (4o) is retracted upward by the drive of this electric motor (M7). It is configured to swing and switch between the position and the position where the packaging sheet (1) to be stored is adsorbed. In the figure (PM2) is a potentiometer for detecting the position of the suction nozzle (40).

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 placed 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 elastically retractably supported by a support bracket (44) attached to the arm (39), and is communicatively connected to a suction device (41) via a suction pipe (45).

As shown in FIG. 12, the suction nozzle (40) has a cylindrical member (47) attached to the outer periphery of a central shaft (46) to form an annular suction port (48).
The structure is such that suction is carried out through a suction path (I) formed inside the container.The suction of the packaging sheet (1) is detected by a negative pressure switch (SI5).

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. 11, the L-shaped arm (51) integrally connected to the saucer (50) is pivoted to the frame (52), and the middle part of the arm (51) and the presser device (7) are connected to each other. A drive arm (53) with a wire (54)
It is interlocked and connected through. The drive arm (53) is a drive pin (31) in the fourth process of the presser device (7).
By the movement of the receiving tray (50), the receiving tray (50) is quickly switched from the supporting position to the releasing position to release the packaged object (C) to the outside.

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 arranged on the outer side of the fourth wrapping device (17d) that operates fourth, and is directed toward the center of the working section (B), that is, the place where the object to be packaged (C) is placed. It is installed so that its position can be adjusted freely along the direction. In detail, as shown in Fig. 13, four rollers (57) are attached and guided by a pair of left and right rails (56), (56) formed on a fixed frame (55), and the rollers (57) are slid. The locking tool (5) is supported freely and is connected to the fixed frame (55).
8), an operating lever (59) that is elastically deformable in the direction of movement;
It is configured to be positioned by engaging the two. The locking tool (58) has three engaging recesses (60a) and (60b).
), (60c), respectively, and the feeding tape (5)
The position is set so that it can be switched corresponding to three sizes of packaging sheets (1).

In addition, along with the above-mentioned position adjustment of the tape feeding device (6), the suction start end position and suction end position of the sheet supply device (2) are changed and adjusted, and the left and right suction nozzles (40), (4)
0) is configured to change the left and right spacing. To explain in detail, the engaging recesses (60a) on both end sides of the locking tool (58)
), a limit switch (61a) that detects the presence of the operating lever (59) in (60c).

(61b), and each switch (61a), (
61b), a control device (H), which will be described later, controls the supply drive motor (M,) of the sheet supply device (2) to change the suction start position and the suction end position. In other words, if the limit switch (61a) on the 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)
It is linked so that the slides are linked 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).
), and this tape support (66) is attached to the tip of a support arm (67) pivotally connected to the fourth wrapper (17d) as shown in FIG. It can be mounted freely, and the roller (
68) is configured to be positioned by engaging with the hook portion (69a) at the lower end of the plate-shaped guide member (69) on the tape feeding device (6) side.

The roller (68) is formed to have a smaller diameter at the central portion in the axial direction, and is configured to be able to be positioned in the left and right direction by being engaged 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 (M8).

As explained above, the packaging device is provided with a tape feeding device (6) whose position can be freely adjusted according to the size of the packaging sheet (1), so that the amount of tape feeding can be adjusted regardless of the size of the sheet. It is possible to supply it in an appropriate state while keeping it constant at all times.

Next, a configuration for controlling the operations of the packaging section (B) and the sheet feeding device (2) will be explained.

As shown in FIG. 1, a control device (H) using a microcomputer is provided, and each limit switch (Sz) to (SI4), (61a) is provided in the control device (H).

(61b), start switch (So), each potentiometer (PM, ), (PM2), negative pressure switch (S,
5) are connected to each other. and the control device ()I)
is adapted to control the operation of the packaging section (B) and the sheet feeding device (2) based on various input information.

That is, the control device (H) is used to control the speed control means (100
) or configured.

Next, the operation of the control device (H) will be explained based on the flowcharts shown in FIGS. 2(a) to 2(d).

First, the packaging procedure will be explained based on FIG. 2(a).

Basically, each time the operator presses the start switch (So), the packaging work section (B) and the sheet feeding device (2)
Each of them performs one cycle of operation, and after the operation is completed, it waits until the start switch (S o) is pressed again. In other words, in a state where the packaging sheet (1) is being fed onto the receiving stand (8) (hereinafter referred to as the paper feeding state), the operator places the object to be packaged on the receiving stand (8) and then By pressing the start switch (S,), the packaging operation in the packaging section (B) is started. In addition, in the sheet feeding device (2), one packaging sheet (
1) is performed during the above-mentioned packaging operation (hereinafter referred to as paper feeding preparation operation).

Furthermore, the packaging sheet (
The operation of feeding 1) onto the receiving table (8) of the packaging work section (B) (hereinafter referred to as paper feeding operation) is executed upon completion of the packaging operation.

However, at the start of work, etc., the paper is not being fed, so the wrapping operation cannot be performed immediately. Therefore, when the start switch (So) is pressed in the above state, the packaging operation in the packaging section (B) is not executed, and the sheet feeding preparation operation and sheet feeding in the sheet feeding device (2) are not performed. Execute the operation and enter the paper feeding state. Then, by pressing the start switch (So) again, the above-mentioned operations including the wrapping operation will be performed.

Here, the holding mechanism (3
) based on the detection information of the upper limit switch (S+□). In other words, it is determined that the paper is being fed when the switch (S, 2) is OFF.

To explain the sheet feeding preparation operation, as shown in FIG. 2(b), the U-shaped arm (39) is moved to the suction start position corresponding to the specified size of the packaging sheet (1). Next, a suction nozzle (40).

(40) is lowered to activate the suction device (41).

After confirming suction, raise the suction nozzles (40) and (40), and move the U-shaped arm (39) to the packaging work section (B).
) by the set distance in the direction away from. Check the suction again and repeat the above operation until the suction is achieved. After the suction is confirmed, the packaging sheets (1) are blown by the separating air nozzle (B1) without vertically swinging the suction nozzles (40), (40) so as not to supply multiple packaging sheets (1). We are trying to separate the two. Then, stand by with the suction nozzles (40), (40) raised to their upper limits.

To explain the paper feeding operation, as shown in FIG. 2(c), first, the adhesive tape (5) is fed out to a predetermined position with the adhesive surface facing upward. Next, move the U-shaped arm (39) to the specified suction end position. Then, the suction nozzles (40), (40) are lowered to release the suction. Thus, the packaging sheet (1) is fed onto the receiving table (8). At this time, an adhesive tape (5) is attached to one end (1d) of the packaging sheet (1) that is folded back at the end. Also, while raising the suction nozzles (40), (40), one side end (lc) diagonally opposite to the negative side end (1d)
) is fixed by the presser roller (15).

Next, the packaging operation will be explained.

As shown in Figure 2 (d) and Figure 3, the receiving stand (8)
The object to be packaged (C) placed on is fixedly held by setting the holding mechanism (3) to the operating position.

Next, the first wrapping tool (17a) is raised until the upper limit switch (B2) is turned on, and the wrapping sheet (1) is removed.
Fold the - side end (la) back onto the top surface of the packaged item.

In addition, the second wrapping device (17b) is activated slightly after the first wrapping device (17a) starts to rise, and the packaging sheet (17a) is activated.
) overlap the minus side edge (1b) on the minus side edge (la). The operation of the second enclosing tool (17b) is performed intermittently in four steps, but in order to prevent the negative end (1a) from wrapping around the second enclosing tool (17b) during the second raising. Activate the blower nozzle (B2).

Middle limit switch (B4) of the second wrapping tool (17b)
) is turned on, the third wrapping device (17c) is activated. Before activation, the third wrapping device (17c) is moved along the outer circumferential surface of the object to be wrapped so that one end (la) and one side edge (lb) are covered without any bulge. Activate the removal nozzle (B,) and blow air toward the bent area.

Moreover, the third wrapping tool (17c) is attached to the packaging sheet (1).
After the side edges (lc) are overlapped, a presser arm (26) presses the upper surface thereof.

Furthermore, after activating the ear-picking nozzle (B4), the fourth wrapping tool (17d) is activated, and the one end (1d) to which the adhesive tape (5) is pasted is folded back and folded into four layers. Glue the wrapped packaging sheet (1).

Next, the presser arm (26) is raised and the holding mechanism (3) releases the object (C) to be packaged. Then, the packaged object (C) is released from the receiving table (8).

[Another example]

In the above embodiment, the package was attached using an adhesive tape (5), but an adhesive or the like may be used, and the specific structure of each part can be changed in various ways.

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 apparatus according to the present invention, in which FIG. 1 is a block diagram of the control configuration, FIGS. 2(a) to (d) are flowcharts of control operation, FIG. The figure is an overall plan view, FIG. 5 is a side view of the same, FIGS. 6 and 7 are side views of the packaging work section, FIG. 8 is a side view of the holding mechanism, FIG. 9 is a side view of the presser device, and FIG. Figure 1O is a perspective view of the same.
FIG. 11 is a side view of the main parts of the holding mechanism, FIG. 12 is a side view of the suction nozzle, FIG. 13 is a perspective view of the tape feeding device, and FIG. 14 is a perspective view of the main parts. (1)...Packaging sheet, (2)...Packaging sheet supply means, (100)...Control means,
(A)... Storage section, (B)... Packaging means, (C)... Item to be packaged.

Claims (1)

[Claims] A packaging means (B) that wraps the packaged object (C) with the supplied packaging sheet (1) and discharges the packaged object (C) upon completion of packaging, and storage of the packaging sheet (1). a packaging sheet supplying means (2) that holds and supplies one packaging sheet (1) from the section (A) to the packaging means (B), the packaging means (B) and the packaging sheet supplying means (2); A packaging device comprising a control means (100) for controlling the operation of the packaging means (100).
B) During the packaging operation, the packaging sheet supply means (2)
) to hold one packaging sheet (1) from the storage section (A), and upon completion of the discharging operation of the packaging means (B), to the packaging sheet supply means (2). A packaging device configured to carry out a feeding operation of a packaging sheet (1) by holding the packaging sheet (1).