JPH07187125A - Packing apparatus - Google Patents

Abstract

PURPOSE:To prevent a wrapping sheet from being wasted due to a pull-out mechanism actuating even if the wrapping sheet cut into a predetermined length is still on a wrapping cable in a packing apparatus having a cutter for cutting the wrapping sheet pulled out by the pull-out mechanism for pulling out the sheet from a roll of the sheet onto the wrapping table. CONSTITUTION:A light sensor 26 is provided for detecting whether or not a wrapping sheet 26 cut into a predetermined length is still on a wrapping table 2, wherein if the sheet 1 is still on the table 2, movement of a pull-out mechanism 16 toward the wrapping sheet 1 is stopped. The pull-out mechanism 16 serves also as the light sensor 26 for detecting that the wrapping sheet 1 has been pulled out onto the wrapping table 2 by a predetermined length.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an object to be packaged (eg vegetables such as lettuce and cabbage, or fruits such as melon and apple).
The present invention relates to a packaging device for agricultural crops, which is wrapped with a packaging sheet.

[0002]

2. Description of the Related Art A packaging apparatus as described above is provided with a packaging table for placing a packaging sheet cut into a predetermined length,
Place a wrapping sheet of a specified length on the wrapping table and place the wrapping object on the wrapping sheet on this wrapping table so that the wrapping means operates and the wrapping sheet is automatically wrapped in the wrapping sheet on the wrapping table. There is one configured in.

In such a packaging device, for example, as disclosed in Japanese Patent Laid-Open No. 5-201411, a packaging sheet is wound around a lateral side portion of a packaging table in a roll shape, and the packaging sheet is then packaged. Some are configured to be pulled out on a table and automatically cut. In this packaging apparatus, when an operator operates an operation switch for pulling out a packaging sheet (corresponding to an operation command), a drawer waiting on the side opposite to the roll-shaped packaging sheet (1 in FIG. 1 of the above publication). The mechanism (58 in FIG. 1 of the publication) passes over the packaging table (2 in FIG. 1 of the publication) and moves to the side of the packaging sheet, as shown in FIGS. 9 and 10 of the publication. A pull-out mechanism holds the end of the packaging sheet. And
As shown in FIG. 11 of the publication, the drawing mechanism again passes over the packaging table in the opposite direction, and draws the packaging sheet onto the packaging table.

As described above, the packaging sheet is pulled out by a predetermined length, and the mark (1d in FIG. 12 of the publication) on the packaging sheet is detected by the optical sensor (FIG. 12 of the publication).
87), the drawing mechanism stops at that position and the cutter (59 in FIG. 13 of the above publication).
Thus, the packaging sheet is cut into a predetermined length. After this cutting, as shown in FIG. 14 and FIG.
The pulling-out mechanism is further moved, and the packaging sheet cut into a predetermined length is placed at approximately the center of the packaging table. Then, the article to be packaged is placed on the packaging sheet of the packaging table, and the packaging means packages the article to be packaged on the packaging sheet of the packaging table.

[0005]

In the packaging apparatus having the above-mentioned drawer mechanism, after placing the packaging sheet cut into a predetermined length by the drawer mechanism and the cutter on the packaging table, for example, the object to be packaged is packaged. It is assumed that an operator accidentally operates the operation switch for the pullout mechanism without placing it on a sheet and packaging it.

If such an operation is performed, the drawer mechanism waiting on the side opposite to the roll-shaped packaging sheet passes over the packaging table and moves to the packaging sheet side. The wrapping sheet already placed on the wrapping table is broken by the pulling-out mechanism, and one wrapping sheet of a predetermined length is wasted. An object of the present invention is to eliminate waste of a packaging sheet due to an erroneous operation of the drawer mechanism in the packaging device having the drawer mechanism as described above.

[0007]

A feature of the present invention is that the packaging apparatus as described above is configured as follows. That is, a wrapping sheet that is wound in a roll shape and is rotatably supported on the lateral side of the wrapping table around the roll axis, a drawing mechanism for the wrapping sheet that is reciprocally movable along the upper surface of the wrapping table, and a wrapping sheet. With a cutter capable of cutting a predetermined position on the roll-shaped portion side of the sheet, based on an operation command for pulling out the packaging sheet, the drawer mechanism moves to the roll-shaped portion side of the packaging sheet, First control means for holding the end portion by the pull-out mechanism, moving the pull-out mechanism in the opposite direction, and operating the pull-out mechanism so as to pull out the sandwiched package sheet on the packaging table while rotating the roll-shaped portion of the package sheet. And an optical sensor that detects by detecting the mark on the packaging sheet that the packaging sheet has been pulled out on the packaging table by the pull-out mechanism for a predetermined length. A second control means for stopping the drawer mechanism to cut the cutter based on the detection of the sir, and in the state where the optical sensor detects the mark on the wrapping sheet, an operation command for drawing out the wrapping sheet. And a check means for preventing the operation of the pull-out mechanism by the first control means.

[0008]

According to the present invention, when the operation command for pulling out is issued, the pulling-out mechanism 16 moves to the roll-shaped packaging sheet 1 side by the first control means, as shown in FIG. 3, for example. As shown in FIG. 4B, the end portion 1b of the packaging sheet 1 is sandwiched, and the drawer mechanism 16 moves in the opposite direction as shown in FIG. 5, so that the packaging sheet 1 is drawn onto the packaging table 2. Then, the packaging sheet 1 is pulled out by a predetermined length, and as shown in FIG.
When c is detected by the optical sensor 26, the pulling-out mechanism 16 is stopped at that position by the second control means, the cutter 12 is operated to cut, and the packaging sheet 1 is cut to a predetermined length. Thereby, the packaging sheet 1 cut into a predetermined length
Will be placed on the packaging table 2.

The fact that the packaging sheet 1 that has been pulled out and cut as described above is placed on the packaging table 2 is determined by, for example, the mark 1d of the packaging sheet 1 and the optical sensor 26 described above as shown in FIG. It has been detected. Therefore, the packaging sheet 1 is placed on the packaging table 2 (the optical sensor 26
Even if an operation command for pulling out the packaging sheet 1 is issued while the mark 1d of the packaging sheet 1 is being detected), the pulling-out mechanism 16 is operated by the action of the restraining means so as to have a roll shape as shown in FIG. 7, for example. Is stopped at the position opposite to the side of the packaging sheet 1, and the pull-out mechanism 16 does not move to the side of the rolled packaging sheet 1.

In this case, the detection of the pulling-out of the pulling-out mechanism and the cutting operation of the cutter and the detection of the blocking of the pulling-out mechanism when the packaging sheet is placed on the packaging table are detected by one optical sensor. Is going. As a result, it is possible to use one optical sensor as compared with the above-described configuration in which a dedicated optical sensor is provided for each of the two detections.

[0011]

EFFECT OF THE INVENTION In the packaging apparatus having the above-mentioned drawer mechanism, an operation command for drawer is erroneously issued in a state where the packaging sheet having a predetermined length is placed on the packaging table and is not packaged and is kept as it is. Even if the drawer mechanism is used, the drawer mechanism does not work, eliminating the waste that the packing mechanism already placed on the packaging table is broken by the drawer mechanism and improving the work efficiency of the packaging machine. Could be achieved. Moreover, one optical sensor is used to detect the pulling out of the pulling mechanism and the cutting operation of the cutter.
The structure is simplified by also being used for the detection for preventing the operation of the drawer mechanism when the packaging sheet is placed on the packaging table, and the advantageous structure in terms of production cost is obtained.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A packing apparatus for agricultural products to which the present invention is applied will be described below with reference to the drawings. (1) FIG. 1 shows the entire packaging device. In this packaging apparatus, an opening 2a for dropping the article A to be packaged is provided on the packaging table 2.
The packaging sheet 1 is wound around a pair of support rollers 5 provided on the lateral side of the packaging table 2 in a roll shape.
Then, a pull-out mechanism 16 for the packaging sheet 1 is provided on the opposite side of the packaging table 2.

(2) First, the flow of the entire packaging in the packaging apparatus of the present invention will be described with reference to FIGS. 8 (A) to 10 (C). When one wrapping is completed, the drawer mechanism 16 in the position shown in FIG.
The end portion 1b of the sheet is clamped, the sheet is moved to the right side of the drawing again, and the packaging sheet 1 is pulled out. When the pull-out mechanism 16 pulls out the packaging sheet 1 by a predetermined length, the pull-out mechanism 16 stops, the cutter 12 descends, and the packaging sheet 1 is cut. When the packaging sheet 1 is cut into a predetermined length in this way, the pull-out mechanism 16 moves further to the right on the paper surface to release the end 1b of the cut packaging sheet 1.

As described above, in a state in which the packaging sheet 1 cut to a predetermined length is placed on the packaging table 2, as shown in FIG. When it is pushed into the opening 2a and dropped, the article A to be packaged is dropped into the lower support base 3 while being wrapped by the packaging sheet 1. After that, when the pair of activation switches 42 shown in FIG. 1 are simultaneously pressed, the pair of left and right holding arms 36 provided on the support base 3 are swung to the side of the article to be packaged A as shown in FIG. Then, the article A to be packaged is held, and as shown in FIG. 8B, the support base 3 and the holding arm 36 are lowered and stopped at a predetermined position. In this case, a plurality of rubber plate-shaped auxiliary squeezing members 11 are provided below the openings 2a so as to surround the article A to be packaged, and the auxiliary squeezing members 11 squeeze the packaging sheet 1 well.

A pair of plate-shaped holding members 14 arranged on the lower side of the packaging table 2 advances toward the packaging sheet 1 side as shown in FIGS. The upper part 1a of 1 is sandwiched and narrowed down. This allows
The article A to be packaged is substantially completely wrapped in the packaging sheet 1. After that, as shown in FIG. 9A, a pair of disk cutters 28 advances along the upper surface of the sandwiching member 14, the upper portion 1 a of the packaging sheet 1 is cut off, and compressed air is jetted from the jet nozzle 6. Then, the upper portion 1a of the packaging sheet 1 attached to the disc cutter 28 is blown off.

Next, as shown in FIG. 9B, the adhesive tape 4 cut into a predetermined length is placed over the upper end of the packaging sheet 1 and the end of the sandwiching member 14, and the adhesive tape 4 shown in FIG. As shown in, the sponge member 7 presses the adhesive tape 4 from above. Then, while the adhesive tape 4 is being pressed by the sponge member 7, the pair of sandwiching members 14 are operated to open as shown in FIG. 10A, and the sponge member 7 is again pressed to the side of the article A to be adhered. The tape 4 adheres to the packaging sheet 1. After that, as shown in FIG. 10B, the holding arm 36 is opened leftward and rightward, the support base 3 is operated sideways, and the article A to be packaged is discharged from the slide table 8 to the outside of the packaging apparatus and collected. (The above is equivalent to packaging means). Then, the support base 3 is again moved up to the original position shown in FIG. 8 (a) to complete one packaging, and the state of the packaged object A is shown in FIG. 10 (c). .

(3) When one wrapping is completed, the wrapping sheet 1 wound in a roll is automatically pulled out and cut for the next wrapping. The support structure of the packaging sheet 1 wound in this roll will be described. As shown in FIG. 3 and FIG. 1, a pair of cylindrical support rollers 5 is provided on the lateral side of the packaging table 2 and is freely rotatable around an axis parallel to the roll axis of the packaging sheet 1 wound in a roll. Are arranged side by side, and the packaging sheet 1 wound in a roll shape on the pair of support rollers 5 is rotatably mounted around the roll axis.

A pair of braking members 27 are swingably supported around the horizontal axis P1 below the support roller 5.
A spring 30 having a pulling action is bridged across both lower ends of the pair of braking members 27. A link 31 is supported on the lower part of each of the braking members 27 so as to be vertically swingable, and the ends of both links 31 are pin-connected. An operating arm 33 that is vertically swung within a predetermined angle by a motor 32 is provided, and a distal end of the operating arm 33 is provided with a long hole (not shown) to connect the distal ends of both links 31 to each other. Is inserted in this slot.

In the state shown in FIG. 3, the operating arm 33 is raised by the motor 32, and the lower portions of both braking members 27 are pulled toward each other by the action of the spring 30, and the upper ends of both braking members 27 are supported by both. It is a state in which both support rollers 5 are being braked by being pressed by the outer surface of the rollers 5. Then, as shown in FIG. 5, when the operation arm 33 is moved down by the motor 32, both links 31 are spread out to the left and right of the paper surface, and the upper ends of both braking members 27 are separated from both support rollers 5 against the spring 30. To be done.

(4) Next, the pull-out mechanism 16 for automatically pulling out the packaging sheet 1 from the packaging sheet 1 wound in a roll for packaging will be described. As shown in FIGS. 3 and 1, below the end 1b of the packaging sheet 1 that is pulled out,
A plurality of first receiving portions 10a are arranged at predetermined intervals along the roll axis direction of the packaging sheet 1, and each first receiving portion 10a is set to the same height. The second receiving portions 10b are arranged to face each of the first receiving portions 10a on the side opposite to the side of the packaging sheet 1 that is wound into a roll at a predetermined interval, and each of the second receiving portions 10b corresponds to the first receiving portion 10a. The height is set a little lower than.

As shown in FIGS. 3 and 1, a pair of support plates 17 are slidably supported along the left and right guide rails 2b of the packaging table 2, and the left and right support plates 17 extend over the support plates 17.
A book support shaft 18 is erected, and five operation arms 19 are independently fitted to the support shaft 18 so as to be swingable independently of each other, and a rubber plate 19a is fixed to the upper surface of the distal end of the operation arm 19. The top plate 20 is erected and connected across the upper ends of the left and right support plates 17, and corresponds to the rubber plate 19a of the operation arm 19.
A rubber plate 20a is fixed to the lower surface of the spring, and a spring (not shown) that urges each operation arm 19 toward the swinging side of the top plate 20.
Is provided, and the drawer mechanism 16 is configured. In this case, as shown in FIG. 3, when the operation arm 19 is being pulled down, the top plate 20 of the drawer mechanism 16 is located at a position slightly higher than the first receiving portion 10a, and the second receiving portion is located. Operation arm 1 at a position slightly lower than 10b
The tip of 9 is located.

As shown in FIG. 3, the support shaft 18 is a support plate 17.
The arm 18a is fixed to the left and right of the support shaft 18, and the arm 18a is rotatably supported with respect to the left and right arms 18a.
A book rod 18b is erected and fixed. A link 23 is erected between a fan-shaped gear 22 swingably supported by one support plate 17 and one arm 18a, and a motor 24 for driving the fan-shaped gear 22 is provided. The state shown in FIG. 3 is a state in which the motor 24 is driven to push up the rod 18b to pull down each operation arm 19 from the top plate 20, and when the motor 24 is driven in reverse to pull down the rod 18b as described later. , The operation arms 19 are lifted to the top plate 20 side by the urging force of the springs, and the end portion 1b of the packaging sheet 1 is
To pinch.

As shown in FIG. 1, one drive shaft 39 is arranged at one end of the packaging table 2, and a pair of drive sprockets 35 are fixed to both ends of the drive shaft 39. Is provided with a motor 38 for rotationally driving. One driven shaft 40 is arranged at the opposite end of the packaging table 2,
The driven sprockets 37 are fixed to both ends of the driven shaft 40. A pair of left and right chains 41 are wound around the left and right drive sprockets 35 and the driven sprockets 37, and the left and right chains 41 are connected to the left and right support plates 17 of the pullout mechanism 16. With the structure described above, the drive sprocket 35 is rotationally driven in the forward and reverse directions by the motor 38 to move the drawer mechanism 16 along the guide rail 2b of the packaging table 2. Further, as shown in FIG. 1, a potentiometer 21 for detecting the position of the pullout mechanism 16 is provided at one end of the driven shaft 40.

(5) Drawer mechanism 16 for the next packaging
The cutter 12 that automatically cuts the packaging sheet 1 pulled out by will be described. As shown in FIGS. 3 and 1,
A support frame 13 is arranged above the first and second receiving portions 10a and 10b, and a flat plate-shaped cutter 1 having a width wider than the lateral width of the packaging sheet 1 is provided on the support frame 13.
2 is fixed. Boss portions 13a fixed to the left and right of the support frame 13 are externally fitted to the left and right guide rails 9, as shown in FIG. 3, and a position separated upward from the end portion 1b of the packaging sheet 1 and shown in FIG. Thus, the whole of the support frame 13 is slid up and down by a motor (not shown) so that the cutter 12 enters between the first and second receiving portions 10a and 10b to cut the packaging sheet 1. .

As shown in FIGS. 3 and 1, the pressing member 15 is a plate member having a width of about ½ of the packaging sheet 1 and a rubber plate 15a attached to the lower surface thereof. There are a total of four, one on the rear side and four on the rear side. Each pressing member 15 is vertically movable on the support frame 13 and is urged downward by a spring 15b.
The rubber plate 15a is supported so as to project downward from the lower end of the cutter 12.

(6) Next, the flow of operation of the pull-out mechanism 16 and the cutter 12 when pulling out the packaging sheet 1 onto the packaging table 2 for the next packaging after the end of one packaging is shown in FIG. ) To FIG. 11, FIG. 11 and FIG. Based on the pushing operation of the start-up switch 42 shown in FIG. 1, when one wrapping is completed as shown in FIGS. 8 (a) to 10 (b), the drawer mechanism 16 at the position shown in FIG. 4 (a). Moves toward the roll-shaped packaging sheet 1 as shown in FIG. 3 (step S1). During this time, the pair of braking members 27 are pressed by the support roller 5, and the support roller 5 is being braked.

When the drawer mechanism 16 reaches the position shown in FIG. 4B based on the detection by the potentiometer 21 shown in FIG. 1, the drawer mechanism 16 stops at the position shown in FIG. 4B (step S2). The pull-out mechanism 16 holds the end portion 1b of the packaging sheet 1 (step S3). In this case,
As shown in (b), each operation arm 1 of the drawer mechanism 16
9 enters between each 1st and 2nd receiving part 10a, 10b, and the edge part 1b of the packaging sheet 1 enters between each operation arm 19 of the drawer mechanism 16 and the top plate 20. Next, the motor 24 of the pull-out mechanism 16 operates to operate the rod 1
8b is pulled down, and each operation arm 19 is pressed by the urging force of the spring.
Moves up to the side of the top plate 20, and each operation arm 19 and the top plate 20
The end portion 1b of the packaging sheet 1 is sandwiched between and.

Next, as shown in FIGS. 4 (b) to 5, the operating arm 33 that has been moved up (see the state of FIG. 3) is moved down to resist the springs 30 of both braking members 27. The upper end is operated so as to be separated from both the support rollers 5, so that the pair of support rollers 5 can freely rotate (step S
4). After that, the pulling-out mechanism 16 starts to move to the right in the drawing with the end portion 1b of the packaging sheet 1 being held, and the pulling-out of the packaging sheet 1 onto the packaging table 2 is started.
With the pulling out of the packaging sheet 1, the roll-shaped portion of the packaging sheet 1 rotates together with the support roller 5 to pull out the packaging sheet 1 (step S5) (the above, the first
Equivalent to control means).

As shown in FIG. 2, the rolled packaging sheet 1 is transparent, and the first mark 1c and the second mark 1d are arranged along the longitudinal direction of both sides of the packaging sheet 1 to be packaged A. It is printed at a predetermined interval corresponding to the type and the like.
In this way, the first and second marks 1c and 1d are provided on both sides of the packaging sheet 1 so that the operation described below can be performed normally even when the packaging sheet 1 is turned upside down. Because of that. As shown in FIGS. 1 and 4 (a), a frame 25 fixed to the packaging table 2 is provided with a reflection type optical sensor 26 including a light emitting device and a light receiving device, and the packaging immediately below the optical sensor 26. A reflection plate 44 is provided at the position of the table 2.

As a result, as shown in FIG. 5, while the packaging sheet 1 is being pulled out, the detection light from the light emitting device of the optical sensor 26 passes through the packaging sheet 1 and the reflection plate 4 of the packaging table 2 is provided.
The light is reflected at 4 and is received by the light receiver of the optical sensor 26. Then, as shown in FIG. 6 when the packaging sheet 1 is pulled out, the first mark 1c of the packaging sheet 1 reaches directly below the optical sensor 26, and the detection light is blocked by the first mark 1c (step S6). ), The drawer mechanism 16 stops at this drawer position (step S7).

Thereafter, as shown in FIGS. 5 to 6, the operation arm 33 is operated to be raised, the lower portions of the both braking members 27 are attracted to each other by the action of the spring 30, and the upper ends of both the braking members 27 are supported by the both support rollers 5. Is pressed against the outer surface of the support roller 5 to brake the support rollers 5 (step S8), and the support frame 13 including the cutter 12 and the pressing member 15 at the upper position is moved downward as shown in FIG. The packaging sheet 1 is cut into a predetermined length (step S9) (the above corresponds to the second control means).

In this case, as shown in FIG. 3, the pressing member 1
Since the rubber plate 15a of No. 5 projects below the lower end of the cutter 12, when the support frame 13 is lowered, the four pressing members 15 in front of and behind the cutter 12 first move the packaging sheet 1 to the first and the second. 2 It is pressed against and held by the receiving portions 10a and 10b. When the support frame 13 is further lowered from this state, the cutter 12 enters between the first receiving portions 10a and the second receiving portions 10b to cut the packaging sheet 1 at a stretch, as shown in FIG. Then, the cutting position of the packaging sheet 1 by the cutter 12 is a position on the left side of the second mark 1d of the packaging sheet 1 on the paper surface as shown by the dotted line in FIG. 2, and the one packaging sheet 1 cut by the cutter 12 is cut. The first and second marks 1c, 1 at the left end of the paper
d is located.

When the cutting of the packaging sheet 1 is completed as described above, the support frame 13 of the cutter 12 is moved up to its original position, and the pulling mechanism 16 holds the packaging sheet 1 cut into a predetermined length. When the potentiometer 21 shown in FIG. 1 detects that the pull-out mechanism 16 has moved to the right side on the paper surface again by a predetermined amount, the pull-out mechanism 16 stops at that position as shown in FIG. 7 (step S10). At this position, the center of the packaging sheet 1 cut into a predetermined length comes to the position of the opening 2a of the packaging table 2, and then the drawer mechanism 16 separates the end portion 1b of the packaging sheet 1 (step S11). ). This allows
As shown in FIG. 8A, one packaging sheet 1 cut into a predetermined length is placed on the packaging table 2.

As shown in FIGS. 3 and 1, in the packaging table 2, a pair of left and right rubber plates 29 made of urethane rubber are provided between the second receiving portion 10b and the opening 2a. This allows
As shown in FIG. 5, the wrapping sheet 1 is pulled out by the pull-out mechanism 16.
The left and right rubber plates 29 are constantly in contact with the lower surface of the packaging sheet 1 while the sheet is being drawn out, so that a space is always formed between the packaging sheet 1 and the packaging table 2, and the entire packaging sheet 1 It is possible to prevent such a state that the sheet comes into close contact with the packaging table 2. Further, as shown in FIGS. 1 and 7, the rubber plate 29
A pair of rubber plates 34 are also provided on the opposite side to
Four rubber plates 29, 3 centered on the opening 2a of the packaging table 2
4 is set on the diagonal line. As a result, when the drawing mechanism 16 separates the packaging sheet 1 cut into a predetermined length as shown in FIG. 7, the four rubber plates 29 and 34 are in contact with the lower surface of the packaging sheet 1,
The contact and friction between the rubber plates 29 and 34 and the packaging sheet 1 prevent the packaging sheet 1 from moving from its position.

As described above, when the packaging sheet 1 cut into a predetermined length is placed on the packaging table 2, the packaging sheet 1 shown in FIGS.
As shown in FIG. 3, the second mark 1d of the packaging sheet 1 is located immediately below the optical sensor 26, and the light detected by the optical sensor 26 is blocked again by the second mark 1d (step S1).
2). After this, the operator pushes the article A to be packed into the opening 2a of the packaging table 2 as shown in FIG.
The packaging is performed once as shown in (b).

In this case, the article A to be packaged is placed in the opening 2 of the packaging table 2.
If it is pushed into a, the packaging sheet 1 of the packaging table 2 is also drawn into the opening 2a together with the article A to be packaged, and the second mark 1d of the packaging sheet 1 is drawn from directly below the optical sensor 26 to the opening 2a side. Then, the light detected by the light emitter of the optical sensor 26 is reflected by the reflector 44 and is received by the light receiver (step S1).
3). Thereby, when the light detected by the light emitter of the optical sensor 26 is received by the light receiver in step S13, it is determined that the article A to be packaged has been pushed into the opening 2a of the packaging table 2, and the start switch 42 is pushed. By operation (step S1
5), the packaging is performed once as shown in FIGS. 8A to 10B (step S16), the process proceeds to step S1, and the packaging sheet 1 for the next packaging is pulled out.

When the packaging sheet 1 placed on the packaging table 2 has an abnormality such as a tear in steps S1 to S12, the operator removes the packaging sheet 1 from the packaging table 2. Even if such an operation is performed, the second mark 1d of the packaging sheet 1 is removed from immediately below the optical sensor 26 as described above, and the light detected by the light emitter of the optical sensor 26 is reflected by the reflection plate 44 to be received by the light receiver. Is received (step S13). As shown in FIG. 1, a drawer switch 43 for operating only the drawer mechanism 16 is provided, and when the packaging sheet 1 of the packaging table 2 is removed as described above, the drawer switch 43 is pushed (step S14). The process proceeds to step S1 and the packaging sheet 1 is newly drawn.

As described above, the packaging sheet 1 cut to a predetermined length in steps S1 to S12 is placed on the packaging table 2 (the second mark 1d of the packaging sheet 1 is located immediately below the optical sensor 26). Then, in a state where the detection light of the optical sensor 26 is blocked by the second mark 1d), the worker pushes the article A to be packed into the opening 2a of the packaging table 2 as shown in FIG. Without performing any operation and without removing the packaging sheet 1 from the packaging base 2,
It is assumed that the drawer switch 43 or the activation switch 42 shown in FIG. 1 is operated by mistake.

As shown in FIG. 7, the packaging sheet 1 is placed on the packaging table 2.
When the drawer switch 43 or the activation switch 42 is operated in the state where is placed, and the drawer mechanism 16 moves to the side of the roll-shaped packaging sheet 1 on the left side of the paper, the packaging is performed at that time. The wrapping sheet 1 of the table 2 is torn by the pull-out mechanism 16, and the wrapping sheet 1
Is wasted.

Therefore, in this way, the packaging sheet 1 is placed on the packaging table 2 (the second mark 1d of the packaging sheet 1 is located immediately below the optical sensor 26, and the light detected by the optical sensor 26 is detected by the second mark). In the state of being cut off by 1d), even if the pull-out switch 43 or the activation switch 42 is operated (steps S17 and S18), this operation signal is ignored (step S19), and the process returns to step S13. As a result, even when the drawer switch 43 or the activation switch 42 is operated with the packaging sheet 1 cut into a predetermined length placed on the packaging table 2, the drawer mechanism 16 is stopped at the position shown in FIG. , Does not move to the side of the roll-shaped packaging sheet 1 (the above corresponds to the restraint means).

[Other Embodiments] In the above embodiments, instead of the first and second marks 1c and 1d on both sides of the packaging sheet 1, as shown in FIG. 13, the first mark 1c to the second mark 1d are used. One mark 1e corresponding to the length may be provided on both sides of the packaging sheet 1.

The second mark 1d in the embodiment of FIG.
May be omitted and only the first mark 1c may be provided on the packaging sheet 1. In this case, as shown in FIG. 6, the wrapping sheet 1 is pulled out by the pulling-out mechanism 16, the first mark 1c blocks the light detected by the optical sensor 26, and the pulling-out mechanism 16 is stopped and the wrapping sheet 1 is cut by the cutter 12. When performed, the pull-out mechanism 16 separates the end 1b of the packaging sheet 1 at the position shown in FIG. Therefore, at the position of the packaging sheet 1 shown in FIG. 6, the center of the packaging sheet 1 is set to be located in the opening 2a of the packaging table 2. Then, in steps S12 and S13 of the configuration of FIG.
By detecting whether or not the first mark 1c is displaced from the position directly below the optical sensor 26, the opening 2a of the article A to be packaged 2a is detected.
It is judged whether the sheet is pushed in or removed from the packaging sheet 1.

In the embodiment of FIG. 6, the packaging sheet 1 is cut to a predetermined length by lowering the cutter 12, but the cutter 12 is placed under the first and second receiving portions 10a and 10b. Alternatively, the packaging sheet 1 may be disposed on the side and the cutter 12 may be lifted to cut the packaging sheet 1 into a predetermined length.

Although the packaging sheet 1 is sealed with the adhesive tape 4 in the above embodiment, the packaging sheet 1 is heated after cutting the upper portion 1a of the packaging sheet 1 shown in FIG. 9A. The present invention may be applied to a packaging device in which 1 is welded to seal the packaging sheet 1. Also, FIG.
The upper portion 1a of the packaging sheet 1 sandwiched by the sandwiching members 14 instead of the disc cutter 28 shown in (a).
The present invention may be applied to a packaging device that heats and melts by heating with a heater (not shown). Then, when the package A is placed on the packaging sheet 1 of the packaging table 2 without providing the opening 2a in the packaging table 2 as shown in FIG. 1, the outer peripheral portion of the packaging sheet 1 is lifted and the packaged article 1 is packaged. The present invention can be applied to a packaging device configured to wrap A.

It should be noted that reference numerals are given in the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

FIG. 1 is an overall perspective view around the packaging table

FIG. 2 is a perspective view of a roll-shaped packaging sheet.

FIG. 3 is a side view showing a state in which the drawer mechanism moves to the side of a roll-shaped packaging sheet.

FIG. 4 is a side view showing a state in which the drawer mechanism has moved to the side of the roll-shaped packaging sheet and before and after clamping the end portion of the packaging sheet.

5 is a side view showing a state in which the pulling-out mechanism has started pulling out the packaging sheet from the state of FIG. 4;

FIG. 6 is a side view showing a state in which the drawing mechanism is stopped based on the detection of the first mark of the optical sensor from the state of FIG. 5 and the packaging sheet is cut by the cutter.

7 is a side view showing a state in which the drawing mechanism is further moved after the state of FIG. 6 and the cut packaging sheet is placed at a predetermined position (open hole) on the packaging table.

FIG. 8 is a perspective view showing the flow of packaging from the insertion of the packaged object into the opening to the narrowing down of the packaging sheet by the sandwiching member.

FIG. 9 is a perspective view showing the flow of packaging from the cutting of the upper portion of the packaging sheet to the pressing of the adhesive tape by the sponge member.

FIG. 10 is a perspective view showing a packaging flow from the opening operation of the holding member to the discharging of the packaged article and a state in which the packaging is completed.

FIG. 11 is a diagram showing the first half of the flow of control of pulling out the packaging sheet by the pulling-out mechanism.

FIG. 12 is a diagram showing the latter half of the flow of controlling the pulling out of the packaging sheet by the pulling-out mechanism.

FIG. 13 is a perspective view of a roll-shaped packaging sheet according to another embodiment.

[Explanation of symbols]

 1 Packaging Sheet 1b Packaging Sheet Edges 1c, 1d, 1e Packaging Sheet Mark 2 Packaging Platform 12 Cutter 16 Drawer Mechanism 26 Optical Sensor A Packaged Items

Claims (1)

[Claims] 1. A packaging sheet (1) cut into a predetermined length.
A packaging base (2) for mounting and a packaging means for wrapping the article (A) placed on the packaging sheet (1) on the packaging base (2) in the packaging sheet (1). A packaging device, which is a packaging sheet (1) which is wound in a roll shape and is rotatably supported around a roll axis by a lateral side portion of the packaging table (2),
A pulling-out mechanism (16) for the packaging sheet (1) that is reciprocally movable along the upper surface of the packaging table (2), and a cutter (12) capable of cutting a predetermined position on the roll-shaped portion side of the packaging sheet (1). ) And based on an operation command for pulling out the packaging sheet (1), the pulling-out mechanism (16) moves to the roll-shaped portion side of the packaging sheet (1), and the vicinity of the cutter (12). While the end portion (1b) of the packaging sheet (1) is held by the drawer mechanism (16) and the drawer mechanism (16) moves in the opposite direction, the roll-shaped portion of the packaging sheet (1) is rotated. First control means for operating the drawer mechanism (16) so as to draw the sandwiched packaging sheet (1) onto the packaging table (2); and the packaging sheet (1) by the drawer mechanism (16) 2) Above An optical sensor (26) for detecting that a predetermined length has been pulled out by detecting the marks (1c), (1d), (1e) of the packaging sheet (1), and the detection of the optical sensor (26). A second control means for stopping the pulling-out mechanism (16) and cutting the cutter (12) on the basis of the above, and the optical sensor (26) includes the mark (1c) of the packaging sheet (1), In the state where (1d) and (1e) are detected, even if an operation command for drawing out the packaging sheet (1) is issued, the operation of the drawing mechanism (16) by the first control means is blocked. A packaging device provided with a restraint means.