JP2771344B2 - Packaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a packaging unit for executing packaging operation for discharging the objects to be packaged with the packaging ends with packaging the packaged articles at the wrapping sheet supplied, the package sheet The present invention relates to a packaging apparatus provided with a packaging sheet supply means for supplying a packaging sheet from a storage section to the packaging means, and a control means for controlling a sequence operation of the packaging means and the packaging sheet supply means.

[0002]

2. Description of the Related Art A packaging apparatus as described above is used for packaging spherical vegetables such as lettuce. The wrapping sheet supply means supplies the wrapping sheet one by one, for example, by sucking the wrapping sheet. Then, in a state where the packaging sheet is supplied to the packaging means, the worker places the article to be packaged on the packaging sheet. In this state, one cycle of the packaging operation is performed by starting the operation of the packaging means. Here, an abnormality may occur in the operation of the packaging sheet supply means during the sequence operation. Conventionally, in such a case, the sequence operation of both the wrapping unit and the wrapping sheet supply unit is immediately stopped. In addition, the sequence
In the case of wrapping means, the wrapping sheet supplied is
At the end of packaging,
A series of operations performed in the set order until the package is discharged
In the case of the packaging sheet supply means, the packaging sheet
Before the packaging sheet is supplied from the storage unit to the packaging means.
A series of operations performed in a fixed order.

[0003]

In the above prior art, the packaging operation is stopped halfway. Therefore, it is possible to return the control unit to the state at the time when the packaging operation was stopped halfway, for example, when the power supply is once turned off, the packaging sheet supply unit is inspected, and then the power supply is turned on and the packaging operation is restarted. It may not be possible. As a result, the packaging operation stopped halfway cannot be performed properly, and the reliability of the packaging operation may be reduced. SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned conventional drawbacks and improve the reliability of the packaging operation.

[0004]

In order to achieve this object, the packaging apparatus according to the present invention is characterized in that an abnormality detecting means for detecting an abnormality in the operation of the packaging sheet supply means is provided, and the control means comprises: When the abnormality detecting means detects an abnormality, the sequence operation of the packaging sheet supply means is stopped at the processing step at that time, and at that time, the
The wrapping means is configured to continue the sequence operation of the wrapping means until the wrapping operation being performed by the wrapping means is completed .

[0005]

The abnormality detecting means determines that an abnormality has occurred, for example, when the packaging sheet supply means cannot absorb the packaging sheet. In such a case, the operation of the wrapping sheet supply means is immediately stopped, but the wrapping means continues the sequence operation until the current wrapping operation is completed. Therefore, when there is no abnormality in the packaging means, the packaging operation does not stop halfway.

[0006]

When there is no abnormality in the packaging means, the packaging operation does not stop halfway, so that the reliability of the packaging operation can be improved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 9 and FIG. 10 show a packaging apparatus for packaging an article to be packaged C such as lettuce with the packaging sheet 1. This packaging apparatus is covered by a storage section A for stacking and storing a large number of packaging sheets 1, a sheet supply apparatus 2 as a sheet supply means for transferring and supplying one by one from the storage section A, and a supplied packaging sheet 1. And a packaging operation section B as a packaging means for wrapping the package C. In the drawing, K1 is an alarm lamp and K2 is an alarm buzzer. A start switch P0, an interruption switch P1, and a reset switch P2 are provided as instruction means for instructing the lateral side portion X of the packaging work section B to start operation. The worker is at the side portion X
Work in a state opposite to

[0008] The packaging work section B includes the supplied packaging sheet 1
A holding mechanism 3 that wraps and holds the packaged object C placed from above, from below, and a wrapping mechanism 4 that folds and guides each end of the packaging sheet 1 on the held packaged object C. A tape feeding device 6 for feeding and supplying an adhesive tape 5 for sticking and fixing the packaging sheet 1 after the wrapping operation, and a packaged object C at the time of the wrapping operation.
There is provided a holding device 7 and the like for preventing the floating of the sheet. In FIG. 9, B3 and B4 are ear blowing nozzles, and in FIG. 10, B1 is a separation blowing nozzle.

As shown in FIGS. 11 to 13, the holding mechanism 3 includes a receiving table 8 for receiving and supporting the packaged object C and a pair of holding arms 9, and the holding arms 9 are rotatable in normal and reverse directions. The electric motor M8 is configured to swing to a retracting position and an operating position to swing upward. That is, the arm 13 that rotates integrally with the electric motor M <b> 8, and the support shaft 13 via the balance swing arm 12.
The swinging drive is performed by interlocking and linking the elevating member 14 slidably moved up and down to each holding arm 9. The electric motor M8 is configured to press one end of the packaging sheet 1 and to interlock and drive a pressing roller 15 for applying tension via a link mechanism 16. Further, limit switches S12, S13, S for controlling the timing of the electric motor M8.
14 are provided. Upper limit switch S in this
12 to the packaging work section B based on the detection information
Is detected as to whether or not has been supplied.

As shown in FIGS. 11 and 12, the wrapping mechanism 4 folds and guides each end of the wrapping sheet 1 on the packaged object C held by the holding mechanism 3 to hold it. 1st to 4th wrapping tools 17a, 17b, 17c, 17d
Each wrapping device is configured to sequentially guide the packaging sheet 1 back along the surface of the packaged object C by the forward / reverse electric motors M1 to M4. Each enclosing tool pivotally supports the first support arm 20 at the tip of a drive arm 19 that is swingably driven within a certain range by each of the electric motors M1 to M4, and has a second support arm at one end of the first support arm 20. The guide arm 22 is supported by a guide roller 22 at the tip of the second support arm 21. The support arms 20, 21 are urged to rotate in the pushing direction of the article to be packaged. A cam roller 23 is provided at the other end of the second support arm 21.
The cam roller 23 is guided by the cam surface 24 with the rotation of the drive arm 19, and each guide roller 22 is guided and driven substantially along the surface of the article C to be packaged. In the drawings, S1 to S9 are limit switches for controlling the timing of the electric motors M1 to M4.
Guide roller 2 of first wrapper 17a operating first
2 is divided into left and right, and the roller 22
Is provided with a blowing nozzle B2 that bends and guides the sheet end side to be guided toward the article C to be packaged. The blowing nozzle B2 blows air in accordance with the wrapping operation of the first wrapping tool 17a, and stops blowing after the second wrapping tool 17b is operated to an intermediate position.

As shown in FIGS. 14 to 16, the holding device 7 is configured so that the holding arm 26 elastically urged downward moves vertically and laterally by driving the electric motor M5. It is configured so as to press the packaged object C with the operation. More specifically, the holding device 7 is provided on the rear side of the second wrapping tool 17b, and supports the laterally moving portion 29 so as to be slidable in the direction toward the center of the working portion with respect to the support frame 28 erected from the machine stand. At the same time, a vertical moving section 30 is supported so as to be vertically movable with respect to the horizontal moving section 29, and a holding arm 26 is attached to the vertical moving section 30. The horizontal moving section 29 is driven to move laterally by a driving pin 31 rotationally driven by the electric motor M5 abuttingly engaging the upper and lower engaging recesses 32, and the vertical moving section 30 is driven by the driving pin 3
1 is brought into contact with and engaged with the locking portion 33 to be driven. Engaging recess 3
The guide hole 34 connected to 2 permits rotation of the drive pin 31 so as not to move laterally during vertical movement driving. The holding device 7 configured as described above includes a first step in which the holding arm 26 laterally moves from the rear upper position to a position above the article C, and a second step in which the holding arm 26 moves downward to hold the article C. The third step of laterally moving and retracting backward and the fourth step of moving upward toward the standby position are sequentially and repeatedly performed. In the drawing, S10 and S11 are limit switches for controlling the timing of the electric motor M5.

Next, the sheet feeding device 2 will be described.
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 the packaging work section B, respectively.
And a suction transfer mechanism 37 that slides by driving the rotation chain 36. The suction transfer mechanism 37 has a pair of support members 38 movably linked to the respective rotating chains 36 so as to be able to swing around a horizontal axis Y1 substantially at the same level as the sprocket axis of the rotating chain 36. The arm 39 is installed and connected at two positions in the middle of the arm 39, and a suction nozzle 40 for sucking the packaging sheet 1 is provided. Each rotation chain 36 is configured to be driven forward and reverse by driving the electric motor M6. A potentiometer PM1 for detecting the amount of movement of the suction transfer mechanism 37 is provided. Further, an electric motor M7 that slides integrally is provided at the pivot point of the arm 39, and a position where the suction nozzle 40 is retracted upward by the driving of the motor M7, and a suction action on the package sheet 1 stored. It is configured so as to switch and swing over the position where the switching is performed. In the drawing, PM2 is a potentiometer for detecting the position of the suction nozzle 40. The storage section A also includes three storage tools 43 for storing three types of packaging sheets 1 of different sizes in a stacked manner.
Are arranged in an inclined posture, and are overlapped so that their front ends are substantially at the same height. Suction nozzle 40, arm 3
The support bracket 44 attached to the support 9 is elastically retractable and connected to the suction device 41 via a suction pipe 45. The suction nozzle 40, as shown in FIG.
A cylindrical member 47 is attached to the outer periphery of the central shaft 46 to form an annular suction port 48, and suction is performed via a suction path 1 formed in the central shaft 46. The suction of the packaging sheet 1 is detected by the negative pressure switch S16.

At the center upper portion of the holding mechanism 3, a saucer 50 having a cross shape in a plan view is provided. The saucer 50 receives and supports the packaged object C around a horizontal axis Y2 at a position below the sheet feeding direction. It is configured to be swingable by switching between a posture and a discharge posture swinging outward and upward. That is, FIG.
As shown in FIG. 6, an L-shaped arm 51 integrally connected to a receiving tray 50 is pivotally supported on a frame 52, and an intermediate portion of the arm 51 and a driving arm 53 provided in the pressing device 7 are connected to a wire 5 by a wire 5.
4 are interlockingly connected. The drive arm 53 is driven to contact and swing by the movement of the drive pin 31 in the fourth step of the holding device 7, and quickly switches the tray 50 from the support position to the release position to remove the packaged object C after the packaging operation is completed. It is configured to release to the side.

The tape feeding device 6 feeds a predetermined amount of the adhesive tape 5 for sticking the packaging for each packaging operation as described above. Then, the position of the feeding tape 5 is set so as to be switched corresponding to the packaging sheets 1 of three kinds of sizes. In addition, the suction start end position and the suction end position of the sheet feeding device 2 are changed and adjusted in accordance with the above-described position adjustment of the tape feeding device 6, and the left-right spacing of the left and right suction nozzles 40 is changed.

Next, the packaging work section B and the sheet feeding device 2
A configuration for controlling the sequence operation of the above will be described. As shown in FIG. 1, a control device H using a microcomputer is provided, and the control device H includes limit switches S1 to S14, a start switch P0, an interruption switch P1, a reset switch P2, potentiometers PM1, PM2, and a negative switch. The pressure switches S16 are respectively connected. The control device H controls the sequence operation of the packaging work section B and the sheet feeding device 2 based on various types of input information, and detects an abnormality in the operation of the sheet feeding device 2. A method of detecting an abnormality in the operation of the sheet feeding apparatus 2 will be described. In the case where the negative pressure switch S16 is not turned on when the suction device 41 is operated during the sheet feeding preparation operation and the sheet feeding operation described below. , An interrupt is generated. Thus, the abnormality of the operation of the sheet feeding device 2 is detected. That is, the control unit 100 and the abnormality detection unit 101 are configured using the control device H.

Next, the operation of the control device H will be described with reference to the flowcharts of FIGS. First, the procedure of the packaging operation will be described with reference to FIG. First, the U-shaped arm 39 is moved to the initial position. Then, the seat position is determined based on the position of the operation lever 59. Then, basically, the worker places the packaged object C in the packaging work section B.
Is supplied, and each time the start switch P0 is pressed, the packaging work section B and the sheet supply device 2 perform one cycle of operation. That is, in a state where the packaging sheet 1 is supplied on the receiving table 8 (hereinafter, referred to as a sheet feeding state),
When the worker places the article to be packaged C on the receiving table 8 and presses the start switch P0, the packaging operation in the packaging operation section B is started. Further, an operation of holding one wrapping sheet 1 from the storage section A in the U-shaped arm 39 in the sheet feeding device 2 (hereinafter, referred to as a paper feed preparation operation) is performed during the above wrapping operation. Further, an operation of supplying 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 a paper feeding operation) is executed upon completion of the packaging operation. However, at the start of the work or the like, since the sheet is not in the paper feed state, the packaging work cannot be performed immediately. Therefore, when the start switch P0 is pressed while 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 enter the sheet feeding state. Then, when the worker places the article to be packaged C on the receiving table 8 and the safety is confirmed, the above-described operation including the packaging operation is performed. Here, whether or not the sheet is in the sheet feeding state is determined based on the detection information of the upper limit switch S12 of the holding mechanism 3. That is, it is determined that the sheet is being fed when the switch S12 is OFF.

The feed preparation operation will be further described. As shown in FIG. 3, the U-shaped arm 39 is moved to the suction start position corresponding to the designated size of the packaging sheet 1.
Next, the suction nozzle 40 is lowered, and the suction device 41 is operated. After the lapse of the set time, the above-mentioned interrupt generation is permitted. Then, the suction nozzle 40 is raised, and the U-shaped arm 39 is moved by a set distance in a direction away from the packaging work section B. Here, the packaging sheet 1 is separated by blowing the air through the separation blowing nozzle B1 while swinging the suction nozzle 40 up and down so as not to supply the plurality of packaging sheets 1. Then, the suction nozzle 40
Waits with the value raised to the upper limit.

To explain the paper feeding operation, as shown in FIG. 4, 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 prohibit the occurrence of the above-described interrupt, and then the suction is released. Thus, the packaging sheet 1 is supplied onto the receiving table 8. At this time, the adhesive tape 5 is attached to one end 1d of the packaging sheet 1 which is folded back at the end. In addition, the suction nozzle 40 is raised, and one side end 1c of the diagonal of the one side end 1d is fixed by the pressing roller 15.

Next, the packaging operation will be described. As shown in FIGS. 5 and 6, first, the packaged object C placed on the receiving table 8 is fixedly held by setting the holding mechanism 3 to the operating posture. Next, the first wrapper 17a is raised until the upper limit switch S2 is turned on, and the packaging sheet 1 is turned on.
Is folded back on the upper surface of the package C. Further, the second wrapping tool 17b is operated slightly after the start of the rising of the first wrapping tool 17a, and the one side end 1b of the packaging sheet 1 is overlapped on the one side end 1a. The operation of the second wrapping tool 17b is performed intermittently in four times, but the blowing nozzle B2 is operated so that the one side end 1a does not wind around the second wrapping tool 17b during the second ascent. . When the middle limit switch S4 of the second wrapping tool 17b is turned on, the third
The wrapping tool 17c is operated, and before the operation, the ear pick-up nozzle B3 is operated so as to cover the one end 1a, 1b along the outer peripheral surface of the article to be packaged without swelling, and to fold the wrapping tool 17c. Blow air toward. After the third wrapping tool 17c overlaps the one side end 1c of the packaging sheet 1, the pressing arm 26 presses the upper surface thereof. Further, after operating the ear picking nozzle B4, the fourth
The wrapping tool 17d is operated to turn back one side end 1d to which the adhesive tape 5 is stuck, and glue the packaging sheet 1 folded in four layers. Next, the holding arm 26 is raised, and the holding of the packaged object C by the holding mechanism 3 is released.
Then, the packaged object C is released from the receiving table 8. Then, the process returns to the main routine.

As described above, when an interruption occurs during the packaging operation, the interruption processing shown in FIG. 7 is executed. Ingredient
To put it concretely, packaging operation and paper feed preparation operation are performed in parallel.
The suction nozzle 40 of the sheet feeding device 2
The suction device 41 for sucking the packaging sheet 1 at
Negative pressure switch S16 is turned on when operating
If not, an interrupt occurs and the interrupt processing shown in FIG.
Execute the paper feed preparation operation sequence operation at that time.
Stop at the processing step. To explain the interrupt processing, first, the program status word (PS
W) is stored in the stack. Next, the alarm lamp K1 is turned on.
N. The alarm buzzer K2 turns on after the end of the packaging operation. These alarms continue until the reset switch P2 is turned on. When the start switch P0 is turned on with the alarm turned off, the PSW is read out and returned to the state at the time when the interrupt occurred. If the power is turned on after the power is turned off during the interrupt processing, the processing is executed from the beginning of the main routine. Therefore, interrupt
Occurs, the reset switch P2 and start switch
Until the switch P0 is operated.
Move the operation to the processing step at that time (the suction nozzle 40
(In a state where the suction device 41 operates).
Become. However, as shown in FIGS.
In the processing, interrupt processing as described above is not permitted, and
Even if an interruption occurs during the operation of the
The part B wraps the article C to be packaged and
The sequence operation of the packaging operation is performed until the object C is released.
Will continue.

[Alternative Embodiment] In the above embodiment, the suction of the packaging sheet 1 is detected based on the input information of the negative pressure switch S16. However, the suction of the packaging sheet 1 is detected by using a photoelectric switch or the like. The specific configuration of the abnormality detection means 101 can be variously changed.

Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is a block diagram of a control configuration.

FIG. 2 is a flowchart of a control operation;

FIG. 3 is a flowchart of a control operation.

FIG. 4 is a flowchart of a control operation.

FIG. 5 is a flowchart of a control operation.

FIG. 6 is a flowchart of a control operation.

FIG. 7 is a flowchart of a control operation.

FIG. 8 is a timing chart of a control operation.

FIG. 9 is an overall plan view.

FIG. 10 is an overall side view.

FIG. 11 is a side view of a packaging operation unit.

FIG. 12 is a side view of a packaging operation unit.

FIG. 13 is a side view of the holding mechanism.

FIG. 14 is a side view of the holding device.

FIG. 15 is a perspective view of a holding device.

FIG. 16 is a side view of a main part of the holding mechanism.

FIG. 17 is a side view of a suction nozzle.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging sheet 2 Packaging sheet supply means 100 Control means 101 Abnormality detection means A Storage part B Packaging means C Packaged object

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-127213 (JP, A) JP-B-58-55062 (JP, B2) JP-B 2-49963 (JP, B2) JP-B 4-4-2 62927 (JP, B2) JP 5-36286 (JP, B2) (58) Fields investigated (Int. Cl. ⁶ , DB name) B65B 57/00 B65B 25/02 B65B 41/18

Claims (1)

(57) [Claims] A packaging means (B) for wrapping a package (C) with a supplied packaging sheet (1) and performing a packaging operation for discharging the package (C) with the completion of the packaging.
A packaging sheet supply means (2) for supplying the packaging sheet (1) from the storage section (A) of the packaging sheet (1) to the packaging means (B); and a supply of the packaging means (B) and the packaging sheet. A packaging device provided with a control means (100) for controlling a sequence operation of the means (2), wherein an abnormality detection means (101) for detecting an abnormality in the operation of the packaging sheet supply means (2) is provided. And the control means (1
00), the abnormality when the detection means (101) detects an error stops the sequence operation of the package sheet supply means (2) in the processing step at that time, before the time
The packaging operation being performed by the packaging means (B) ends.
And a packaging device configured to continue the sequence operation of the packaging means (B) until the packaging operation is completed.