JPH04339741A - Packing device - Google Patents

Abstract

PURPOSE:To improve work efficiency of a packing device in which one cycle of packing work is done by a command of work start by a method wherein when an inconvenience occurs in operation of a packing part and a power source becomes OFF temporarily, a sequence operation can be restarted soon after removing a cause of the inconvenience. CONSTITUTION:When a power source of a packing part becomes ON, it is discriminated at which processing step the packing part stops based on information from a limit switch or the like. Then accompanying with a work start, a sequence operation is restarted from the processing step where the packing part stopped.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is directed to a packaging means for packaging an object with a supplied packaging sheet and for discharging the object upon completion of packaging, and for detecting the operating state of the wrapping means. The present invention relates to a packaging apparatus that is provided with a state detection means, a control means for controlling the sequential operation of the packaging means based on information from the state detection means, and an instruction means for instructing the start of operation of the control means.

0002

2. Description of the Related Art A packaging device as described above is used for packaging spherical vegetables such as lettuce. That is, with the packaging sheet supplied to the packaging means, the operator places the object to be packaged on the packaging sheet. In this state, the packaging operation is executed by starting the operation of the packaging means. Here, for example, if the way in which the items to be packaged are placed is different from usual, problems such as locking of the operation of the packaging means may occur. In such a case, the sequence operation is temporarily stopped, the cause of the problem is eliminated, and then the sequence operation is restarted, but the power may be turned off for safety reasons. Conventionally, when the power is turned on, the sequence operation is always started from the first processing step.

0003

In the above-mentioned prior art, it is necessary to return the packaging means to the initial state when restarting the sequence operation. Therefore, even if the cause of the problem is eliminated, the sequence operation cannot be restarted immediately, resulting in a decrease in work efficiency. An object of the present invention is to solve the above-mentioned conventional drawbacks and to obtain a packaging device with high working efficiency.

0004

[Means for Solving the Problems] In order to achieve this object, the packaging device according to the present invention has a characteristic configuration in which, when the packaging device is powered on, the control means is configured to control the packaging device based on information from the state detection device. The packaging means is configured to determine at which processing step the packaging means is stopped, and to restart the sequence operation from the processing step when the instruction means instructs to start the operation.

[0005]

[Operation] The state detecting means can be composed of a limit switch or the like. In other words, the limit switches are arranged so that they are activated one after another as the steps of the sequence operation progress. Therefore, it is possible to determine the processing step from the state of the limit switch. Even if the power is turned off during the sequence operation, the sequence operation can be restarted from the processing step where the operation was stopped by turning on the power and operating the instruction means.

[0006]

[Effects of the Invention] Even if the power is turned off, the sequence operation can be resumed as soon as the cause of the problem is eliminated. As a result, a packaging device with high working efficiency can be obtained.

[0007]

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. 9 and 10 show a packaging device for packaging an object C such as lettuce with a packaging sheet 1. As shown in FIG. This packaging device includes a storage section A that stores a large number of packaging sheets 1 in a stacked manner, a sheet supply device 2 that transports and supplies sheets one by one from the storage section A, and wraps the packaged object C with the supplied packaging sheets 1. It consists of a packaging work section B as a packaging means. In the figure, K1 is a warning lamp, and K2 is a warning buzzer. A start switch P0, an interrupt switch P1, and a reset switch P2 are attached to the side part X of the packaging work section B as instruction means for instructing the start of operation. The worker will work in a state facing the side part X.

[0008] The packaging work section B is configured to process the supplied packaging sheet 1.
A holding mechanism 3 wraps and holds the packaged object C placed from above from below, and a wrapping mechanism 4 wraps and guides the packaged object C by folding each end of the packaging sheet 1 over the held packaged object C. , a tape feeding device 6 for feeding and feeding the adhesive tape 5 for adhering and fixing the packaging sheet 1 after the wrapping operation, and a packaged object C during the wrapping operation.
A holding device 7 and the like are provided to prevent the floating of the material. In addition, in Fig. 9, B3 and B4 are the ear removal air nozzles, Fig. 1
B1 in 0 is a separation blower nozzle.

As shown in FIGS. 11 to 13, the holding mechanism 3 includes a receiving stand 8 for receiving and supporting the packaged object C, and also includes a pair of holding arms 9, which can be rotated forward and backward. It is configured to be swing-driven between a downwardly retracted position and an upwardly swinging working position by an electric motor M8. In other words, the arm 11 that rotates integrally with the electric motor M8 moves the support shaft 13
The lifting member 14, which is driven to slide up and down relative to the holding arm 9, is interlocked and connected to each holding arm 9, and swinging is performed. Further, the electric motor M8 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 16. In addition, limit switches S12, S13, S for timing control of electric motor M8
14 are provided. Upper limit switch S among these
Packaging sheet 1 is sent to packaging work section B based on the detection information of 12.
It is designed to detect whether or not it has been supplied.

As shown in FIGS. 11 and 12, the wrapping mechanism 4 includes four folding sheets that fold and guide each end of the packaging sheet 1 onto the object C held by the holding mechanism 3. 1 to 4 wrapping tools 17a, 17b, 17c, 17d
Each wrapping tool is configured to sequentially fold and guide the packaging sheet 1 along the surface of the object C to be packaged using forward and reverse electric motors M1 to M4. Each wrapping tool has a first support arm 20 pivotally supported at the tip of a drive arm 19 that is swing-driven in a certain range by each electric motor M1 to M4, and a second support arm at one end of the first support arm 20. 21, and a guide roller 22 is supported at the tip of the second support arm 21, and each of the support arms 20, 21 is biased to rotate in the direction of pushing the object to be packaged. Further, 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 a cam surface 24 as the drive arm 19 rotates, so that each guide roller 22 almost supports the object to be packaged. It is configured to be guided and driven along the surface of C. Note that S1 to S9 in the figure are limit switches for timing control of each electric motor M1 to M4. Guide roller 2 of the first wrapping tool 17a that operates first
2 is divided into left and right halves, and the roller 22 is placed between them.
A blowing nozzle B2 is provided to bend and guide the sheet end side guided by the sheet toward the packaged object C side. This air blowing nozzle B2 blows air in conjunction with the wrapping operation of the first wrapping tool 17a, and stops blowing air after the second wrapping tool 17b operates to an intermediate position.

As shown in FIGS. 14 to 16, the presser device 7 is configured such that a presser arm 26 elastically biased downward moves vertically and horizontally by driving an electric motor M5, and It is configured to press down the packaged object C as it is operated. To be more specific, the holding device 7 is provided on the rear side of the second enclosing tool 17b, and supports the lateral moving part 29 so as to be slidable in the direction toward the center of the working part with respect to the support frame 28 erected from the machine stand. At the same time, a vertically movable section 30 is supported so as to be vertically movable relative to this horizontally movable section 29, and a presser arm 26 is attached to this vertically movable section 30. The lateral movement part 29 is driven to move laterally by a drive pin 31 rotationally driven by the electric motor M5 abutting and engaging with the vertical engagement recess 32, and the vertical movement part 30 is driven to move laterally by the drive pin 31 rotationally driven by the electric motor M5.
is brought into contact with and engaged with the locking portion 33 and is driven. Engagement recess 32
The guide hole 34 connected to the guide hole 34 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 has a first structure in which the presser arm 26 moves laterally from a standby position in the rear upper part to above the object C.
The following steps are sequentially repeated: a second step of moving downward to hold down the packaged object C, a third step of moving backward and retracting, and a fourth step of moving upward toward the standby position. In the figure, S10 and S11 are limit switches for timing control of the electric motor M5.

Next, the sheet feeding device 2 will be explained. As shown in FIGS. 9 and 10, a guide rail 35 and an endless rotating chain 36 are disposed on both left and right sides of the storage section A and packaging section B, and both guide rails 35
A suction transfer mechanism 37 is provided which is guided by a rotation chain 36 and slides by driving a rotation chain 36. The suction transfer mechanism 37 includes a pair of support members 38 that are movably connected to each rotary chain 36, and includes a support member 38 that is movable around a horizontal axis Y1 that is approximately at the same level as the sprocket axis of the rotary chain 36. A square arm 39 is constructed and connected, and suction nozzles 40 for suctioning the packaging sheet 1 are provided at two intermediate positions of the arm 39. Each rotating chain 36 is configured to be driven in forward and reverse directions by driving an electric motor M6. A potentiometer PM1 for detecting the amount of movement of the suction transfer mechanism 37 is provided. Further, the rotational fulcrum of the arm 39 is equipped with an electric motor M7 that slides integrally, and the drive of this motor M7 causes the suction nozzle 40 to move upward, and the suction action is applied to the packaging sheet 1 to be stored. It is constructed so that it can be switched and oscillated over the following positions. In the figure, PM2 is a potentiometer for detecting the position of the suction nozzle 40. Furthermore, in the storage section A, there are three storage devices 43 for storing three types of packaging sheets 1 of different sizes in a stacked manner.
are arranged in an inclined position and one on top of the other so that their front ends are approximately at the same height. Suction nozzle 40, the arm 3
It is supported by a support bracket 44 attached to 9 so as to be elastically retractable, and is communicatively connected to a suction device 41 via a suction pipe 45. As shown in FIG. 17, the suction nozzle 40 is
A cylindrical member 47 is attached to the outer periphery of the center shaft 46 to form an annular suction port 48, and is configured to draw suction through a suction path 1 formed within the center shaft 46. Adsorption of the packaging sheet 1 is detected by a negative pressure switch S16.

A receiving tray 50 having a cross shape in plan view is provided at the upper center of the holding mechanism 3, and this receiving tray 50 receives and supports the object to be packaged C around the horizontal axis Y2 at the lower position on the downstream side in the sheet feeding direction. It is configured to be able to freely switch and swing between the position and the discharge position that swings outward and upward. In other words, Figure 1
6, an L-shaped arm 51 integrally connected to a saucer 50 is pivotally supported on a frame 52, and a middle part of the arm 51 and a drive arm 53 provided on the presser device 7 are connected by a wire 5.
They are interlocked and connected via 4. The drive arm 53 is brought into contact and oscillated by the movement of the drive pin 31 in the fourth step of the presser device 7, and quickly switches the receiving tray 50 from the supporting position to the releasing position to remove the packaged object C that has been wrapped. It is constructed so that it emits in the direction.

[0014] The tape feeding device 6 feeds out a predetermined amount of the adhesive tape 5 for packaging for each packaging operation as described above. Further, the position of the feeding tape 5 is set to be changed according to the packaging sheets 1 of three different sizes. Furthermore, along with the above-mentioned position adjustment of the tape feeding device 6, the suction start position and the suction end position of the sheet supply device 2 are changed and adjusted, and the left and right spacing between the left and right suction nozzles 40 is also changed.

Next, the packaging work section B and the sheet feeding device 2
The configuration for controlling the sequence operation will be explained. As shown in FIG. 1, a control device H using a microcomputer is provided, and the control device H includes each limit switch S1 to S14, a start switch P0, an interrupt switch P1, a reset switch P2, each potentiometer PM1, PM2, and a negative A pressure switch S16 is connected to each. The control device H controls the sequential operation of the packaging section B and the sheet feeding device 2 based on various input information, and detects the operating state of the packaging section B. To explain the method for determining at which processing step the packaging work section B is stopped, the control device H performs the following steps as shown in the time chart of FIG.
Packaging work section B while checking whether the limit switches S1 to S14 are operating normally based on the input information of each limit switch S1 to S14.
sequence processing is being executed. In other words, the processing steps of the sequence operation can be determined based on the input information of the limit switches S1 to S14. Here, when the power is turned on, the initial program is activated and the states of the limit switches S1 to S14 are checked. Accordingly, the processing steps corresponding to the states of the limit switches S1 to S14 are determined (see FIG. 2). Incidentally, if it is not possible to determine the processing step corresponding to the states of the limit switches S1 to S14, it is determined that there is an abnormality and an alarm is generated. That is, the control device H is used to configure the control means 100 and the state detection means 101.

Next, the operation of the control device H will be explained based on the flowcharts shown in FIGS. 2 to 7. First, the initial processing shown in FIG. 2 will be explained. As described above, the processing step corresponding to the state of the limit switches S1 to S14 is determined, and the address of the main program corresponding to the processing step is set in the program counter. Then move on to the main program. Next, the contents of the main program will be explained based on FIGS. 3 to 7. First, the U-shaped arm 39 is moved to the initial position. Then, the seat position is determined based on the position of the operating lever 59. Basically, each time the worker supplies the packaged object C to the packaging section B and presses the start switch P0, the packaging section B and the sheet feeding device 2 each perform one cycle of operation. conduct. In other words, the state in which the packaging sheet 1 is being fed onto the receiving table 8 (hereinafter referred to as the paper feeding state)
At this time, the wrapping operation in the packaging section B is started when the operator places the object C on the receiving table 8 and presses the start switch P0. Also,
In the sheet feeding device 2, an operation of holding one packaging sheet 1 from the storage section A in the U-shaped arm 39 (hereinafter referred to as a sheet feeding preparation operation) is performed during the above-mentioned packaging operation. Furthermore, the operation of feeding the packaging sheet 1 held by the U-shaped arm 39 onto the receiving table 8 of the packaging work section B (hereinafter referred to as sheet feeding operation) is executed upon completion of the packaging operation. However, when starting work, the paper is not in the feeding state, so
Packaging operations cannot be carried out immediately. Therefore, when the start switch P0 is pressed in the state where the sheet is not being fed as described above, the sheet feeding device 2 executes the sheet feeding preparation operation and the sheet feeding operation to set the sheet feeding state. Then, when the operator places the object C on the receiving table 8 and safety is confirmed, the above-mentioned operations including the wrapping operation are performed. Here, the determination as to whether or not the paper is being fed is made based on the detection information of the upper limit switch S12 of the holding mechanism 3. That is, it is determined that the paper is being fed when the switch S12 is OFF.

To explain the sheet feeding preparation operation, as shown in FIG. 4, the U-shaped arm 39 is moved to the suction start position corresponding to the specified size of the packaging sheet 1. Next, the suction nozzle 40 is lowered and the suction device 41 is activated. After the suction is confirmed, the suction nozzle 40 is raised, and the U-shaped arm 39 is moved a set distance in the direction away from the packaging work section B. Check the suction again and repeat the above operation until the suction is achieved. After the suction is confirmed, the packaging sheets 1 are separated by blowing air with the separating air blowing nozzle B1 while swinging the suction nozzle 40 up and down so as not to feed a plurality of packaging sheets 1. Then, the suction nozzle 40 is raised to the upper limit and stands by.

To further explain the paper feeding operation, as shown in FIG. 5, first, the adhesive tape 5 is fed out to a predetermined position with the adhesive surface facing upward. Next, the U-shaped arm 39 is moved to the specified suction end position. Then, the suction nozzle 40 is 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. Further, while raising the suction nozzle 40, one side end 1c diagonally opposite to the one side end 1d is fixed by the press roller 15.

Next, the packaging operation will be explained. As shown in FIGS. 6 and 7, first, the object to be packaged C placed on the receiving stand 8 is fixedly held by setting the holding mechanism 3 to the working position. Next, the first wrapping tool 17a is raised until the upper limit switch S2 is turned on, and the packaging sheet 1
One side end 1a is folded back onto the top surface of the object C to be packaged. Further, the second wrapping tool 17b is operated a little after the first wrapping tool 17a starts rising, and the one side end 1b of the packaging sheet 1 is superimposed on the one side end 1a. The operation of the second enclosing tool 17b is performed intermittently in four steps, but the blower nozzle B2 is operated so that the one side end 1a does not wrap around the second enclosing tool 17b when the second enclosing tool 17b rises. . When the middle limit switch S4 of the second wrapping tool 17b is turned on, the third
The wrapping tool 17c is operated, but before the wrapping tool 17c is operated, the ear-picking nozzle B3 is operated so as to cover one side edge 1a, 1b along the outer circumferential surface of the object to be packaged C without any bulge. Blow air towards. Further, after the third wrapping tool 17c overlaps one side end 1c of the packaging sheet 1, the presser arm 26 presses the upper surface thereof. Furthermore, after activating the ear removal nozzle B4, the fourth
The wrapping tool 17d is operated, one end 1d to which the adhesive tape 5 is attached is folded back, and the four-layered packaging sheet 1 is glued. 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. Then return to the main routine.

[Another Embodiment] In the above embodiment, the packaging means B is
Although the operating state of the sensor is detected, a photoelectric switch or the like may also be used.

[0021]Although reference numerals are written in the claims for convenience of comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of drawings]

[Figure 1] Block diagram of control configuration

[Figure 2] Flowchart of control operation

[Figure 3] Flowchart of control operation

[Figure 4] Flowchart of control operation

[Figure 5] Flowchart of control operation

[Figure 6] Flowchart of control operation

[Figure 7] Flowchart of control operation

[Figure 8] Timing chart of control operation

[Figure 9] Overall plan view

[Figure 10] Overall side view

[Figure 11] Side view of packaging work section

[Figure 12] Side view of packaging work section

[Figure 13] Side view of the holding mechanism

[Figure 14] Side view of presser device

[Figure 15] Perspective view of presser device

[Figure 16] Side view of main parts of the holding mechanism

[Figure 17] Side view of suction nozzle

[Explanation of symbols]

1 Packaging sheet 100 Control means 101 Status detection means B Packaging means C Packaged items P0 Instruction means

Claims (1)

[Claims] 1. A packaging means (B) for packaging an object (C) with a supplied packaging sheet (1) and discharging the object (C) upon completion of packaging, and the packaging means. (B) State detection means (101) for detecting the operating state of
), a control means (100) for controlling the sequence operation of the packaging means (B) based on the information of the state detection means (101), and an instruction means (P0) for instructing the start of operation of the control means (100). ), wherein the control means (100) controls the packaging means (B) based on information from the state detection means (101) when the power of the packaging apparatus is turned on. The instruction means (P0
) is configured to restart the sequence operation from the processing step when the operator instructs the start of operation.