JP2731674B2 - Packaging equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging device for agricultural products, which wraps a spherical object to be packaged (for example, vegetables such as lettuce and cabbage, or fruits such as melon and apple) in a packaging sheet.

[0002]

2. Description of the Related Art As the above-mentioned packaging apparatus, there is one disclosed in, for example, Japanese Patent Application Laid-Open No. 3-133710. In this packaging apparatus, a packaging table having an opening into which an object to be packaged falls is provided, a packaging sheet of a predetermined length is placed on the packaging table, and the object to be packaged is dropped into the opening from above. . As a result, the packaging sheet is squeezed, the object to be packaged is wrapped in the packaging sheet and supported by the lower support table, and an excess portion of the squeezed packaging sheet is cut and the packaging sheet is fastened.

[0003] It has been proposed that the above-mentioned packaging apparatus has a drawer mechanism for pulling out a packaging sheet of a predetermined length to a predetermined position of the opening of the packaging table for the next packaging after the completion of one packaging. I have. In this case, for example, FIG.
As shown in (a), at the holding position close to the packaging sheet 1, the operating arm 41 of the drawing mechanism 38 holds the end 1b of the packaging sheet 1, and from this state, the drawing mechanism 38 moves rightward on the paper. The packaging sheet 1 is pulled out. Next, as shown in FIG. 18 (b), when the packaging sheet 1 is pulled out by a predetermined length, the pulling-out mechanism 38 stops at this pull-out position, and the packaging sheet 1 is cut by the cutter 33. It is conceivable that the operation arm 41 is configured to separate the end 1b of the packaging sheet 1 having a predetermined length. Therefore, in the state shown in FIG. 18B, the operation arm 41 is connected to the end 1 of the packaging sheet 1 having the predetermined length.
When the object to be packaged is dropped into the opening 2a of the packaging table 2 from above in the state where the operation is released, the package object falls into the lower support table while being wrapped in the packaging sheet 1.

[0004]

As described above, when a packaging sheet having a predetermined length is placed on a packaging table, a predetermined portion of the packaging sheet having a predetermined length (for example, the front, rear, left, and right central portions) is placed on the packaging table. In many cases, a drawer position (the position shown in FIG. 18B) at which the drawer mechanism stops is set so as to be located at the opening. However, since the operation of pulling out the packaging sheet by the pulling-out mechanism and stopping at the pulling-out position and releasing the operation arm of the pulling-out mechanism is performed continuously at a relatively high speed, the front side of the packaging sheet in the advancing direction (the drawing mechanism side) (The end 1 in FIG. 18B)
From b), air easily enters between the packaging sheet and the packaging table. Further, generally, a thin and soft film-like packaging sheet is often used.

Therefore, if air enters between the packaging sheet having a predetermined length and the packaging table when the drawer mechanism is stopped at the drawer position, the operation arm of the drawer mechanism must have a predetermined length until the air completely escapes. Since the end of the packaging sheet is separated, the packaging sheet of a predetermined length may move slightly up from the packaging table. When the packaging sheet of a predetermined length moves as described above, a predetermined portion of the packaging sheet of a predetermined length is displaced from the position of the opening of the packaging table. In this state, the object to be packaged is dropped into the opening. For example, there is a case where the object to be packaged is biased to one side with respect to the packaging sheet having a predetermined length, so that a clean packaging cannot be performed. Further, in order to perform clean packaging, it is necessary to correct the position of the moved packaging sheet having a predetermined length. SUMMARY OF THE INVENTION It is an object of the present invention to provide a packaging apparatus in which a packaging sheet having a predetermined length is not displaced when the packaging sheet is pulled out by the above-described drawing mechanism.

[0006]

A feature of the present invention resides in the following configuration in the above-described packaging apparatus. With a drawer mechanism having an operation arm for sandwiching the end of the packaging sheet, a clamping position for clamping the end of the packaging sheet supported on the lateral side of the packaging table by the operation arm,
An operation means for pulling out the sandwiched packaging sheet to a predetermined position on the opening of the packaging table, and moving the drawing mechanism back and forth between the operation arm and the extraction position at which the end of the packaging sheet is separated from the operation arm. A resistance portion is provided to apply a resistance to the packaging sheet remote from the operation arm to suppress the movement of the packaging sheet.

[0007]

According to the first aspect of the present invention, a predetermined length of the wrapping sheet is pulled out by the drawer mechanism, the drawer mechanism stops at the drawer position, and the end of the predetermined length of the wrapping sheet is moved from the operation arm of the drawer mechanism. When separated, a resistance is applied to the predetermined length of the packaging sheet by the resistance portion, and the movement of the predetermined length of the packaging sheet is suppressed. As a result, even if air enters between the packaging sheet of the predetermined length and the packaging table, and the packaging sheet of the predetermined length slightly rises, the packaging sheet of the predetermined length is moved from the position by the resistance portion. There is no.

[0008]

According to the first aspect of the present invention, when the packaging sheet of a predetermined length is separated from the operation arm of the drawer mechanism at the drawer position in the packaging device, the movement of the predetermined length of the packaging sheet can be suppressed. . As a result, a predetermined portion of the packaging sheet having a predetermined length can be always positioned at the opening of the packaging table, and a clean packaging without bias can be performed, thereby improving the packaging performance of the packaging device. I was able to. Further, since it is not necessary to correct the position of the moved packaging sheet having the predetermined length, the operability can be improved.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. (1) FIG. 1 shows the entire packaging device of the present invention. First,
FIG. 1 shows the flow of one package in this packaging apparatus.
1 (a) to FIG. 13 (c) and FIGS. As shown in FIG. 11A, in a state where one packaging sheet 1 cut to a predetermined length is placed on the packaging table 2, the worker puts the packaged object A into the opening 2 a of the packaging table 2. When it is dropped in, the packaged object A falls into the lower support 3 while being slightly wrapped in the packaging sheet 1 (step S).
1). After this, when the start switch (not shown) is operated (step S2), as shown in FIG.
Is lowered (Step S5), and stopped at a predetermined position (Step S7). In this case, a plurality of rubber plate-shaped auxiliary squeezing members 11 are provided below the opening 2a so as to surround the article to be packaged A, and the auxiliary squeezing member 11 squeezes the packaging sheet 1 well.

Next, a pair of plate-like holding members 14 arranged on the lower side of the packaging table 2 are shown in FIGS.
As shown in (a), the sheet proceeds to the packaging sheet 1 side (step S9), and the upper portion 1a of the packaging sheet 1 is sandwiched and narrowed down. Thereby, the packaged object A is almost completely wrapped in the packaging sheet 1. Thereafter, as shown in FIG. 12A, the pair of disk cutters 28 advances along the upper surface of the sandwiching member 14, and the upper portion 1a of the packaging sheet 1 is cut off (step S10). The packaging sheet 1 on which the air is injected and adheres to the disc cutter 28
Is blown off (step S11).

Next, as shown in FIG. 12B, the adhesive tape 4 cut to a predetermined length is placed over the upper end of the packaging sheet 1 and the end of the holding member 14 (step S12).
As shown in FIG. 12C, the adhesive tape 4 is pressed from above by the sponge member 16 (step S13). With the adhesive tape 4 pressed by the sponge member 16, the pair of holding members 14 are opened (step S14) as shown in FIG.
Is pressed toward the packaged object A (step S15),
The adhesive tape 4 is securely brought into close contact with the packaging sheet 1.

Thereafter, as shown in FIG. 13 (b), the support base 3 is turned over, and the packaged object A is released to the slide 15 and collected (step S17). One package is completed as described above, and the state of the packaged object A after the packaging is shown in FIG. Next, the support 3 is raised to the original position shown in FIG. 11A (step S18).

(2) Next, a description will be given of the lifting structure of the support 3 in FIG. As shown in FIG. 9, a first support frame 6 is vertically slidably attached to a pair of left and right guide rails 5 arranged below the opening 2 a of the packaging table 2.
The support table 3 is supported by a second support frame 17 fixed to an upper portion of the first support frame 6 via a spring 7 for absorbing shock. The support base 3 is configured by bending four sides of a flat plate having a plus shape in plan view upward. Horizontal axis core P1
An operation arm 8 swingable around is connected to the first support frame 6 by a pin and a long hole structure.
Is provided with an operation cylinder 9 for swinging the cylinder up and down.

As shown in FIG. 9, the second support frame 17
A pair of holding arms 18 are provided around the horizontal axis P3 at the left and right ends.
Are swingably supported. A horizontally long sponge member 18a is attached to the tip of the holding arm 18, and a spring 19 for urging the left and right holding arms 18 to swing toward the center support 3 is provided. The vertical posture shown in FIG.
The operation arm 21 is operated to switch between the left and right postures shown in FIGS. 1A and 1B. Both ends of the operation arm 20 and the lower ends of the left and right holding arms 18 are connected by a link 22.

(3) Next, the present invention relates to a slide drive structure for the pair of holding members 14 in FIGS. 11 (C) and 12 (A). As shown in FIGS. 6 and 7, a round bar-shaped first guide rail 23 and a plate-shaped second guide rail 24 are provided below the packaging table 2 on both sides of the opening 2a. The boss portion 14a is fixed to one end of the holding member 14, and the boss portion 14a is slidably fitted on the first guide rail 23, and
Is placed on the second guide rail 24 and bent downward.

A bracket 25 is fixed to the boss 14a of one of the holding members 14, and a double-acting air cylinder 26 is connected to the bracket 25. A balance arm 27 is swingably supported around a vertical axis P4 of the fixed portion, and a roller 27a at one end of the balance arm 27 is inserted into a concave portion of the bracket 25. Balance arm 27
Over the other end and the boss 14a of the other holding member 14,
A link rod 29 is erected and connected.

With the above structure, when the air cylinder 26 in the extended state is operated to the contracted side as shown in FIGS. 6 and 7, the holding member 14 on the right side of the paper slides to the left on the paper. In conjunction with this operation, the balance arm 27
Swings clockwise in the drawing. Thereby, the link rod 2
9, the other holding member 14 is slid rightward on the paper, and the upper portion 1a of the packaging sheet 1 is moved by the pair of holding members 14 as shown in FIG.
Is narrowed down.

As shown in FIG. 7, a pair of auxiliary holding members 30 are provided below the pair of holding members 14 so as to swing in a direction perpendicular to the sliding direction of the holding members 14. The pair of auxiliary holding members 30 are swingably supported on the lower side of the holding member 14 around the longitudinal axis P5 of the fixed portion. A pair of rollers 14c provided on the back surface of 14 are inserted into the long holes 30a, and a guide plate 31 is provided to support the auxiliary holding member 30 so as not to face downward.

With this structure, when the air cylinder 26 starts to contract from the state shown in FIG. 7 and the pair of holding members 14 start to approach each other, the pair of opened auxiliary holding members 3
0 also starts to approach each other in conjunction with the progress of the roller 14c. When the air cylinder 26 contracts to the stroke end, the holding member 14 and the auxiliary holding member 30 are almost completely closed as shown in FIG.
Is narrowed down.

(4) After the support base 3 is lowered as shown in FIG. 11 (b), the pair of holding members 14 are moved to the packaging sheet 1 as shown in FIG. 11 (c) and FIG. 12 (a). The flow of control up to narrowing down is described. At a position slightly above the holding member 14 as shown in FIGS.
a is disposed in the vicinity of one corner on the rear side of one holding member 14, and the four light receivers 32 b are arranged at predetermined intervals in the vicinity of the opposite corner on the rear side of the other holding member 14. The light sensor 32 is composed of one light emitter 32a and four light receivers 32b.

The light emitter 32a projects the detection light with a spread over a predetermined range in the left and right direction (a range from the light receiver 32b at one end to the light receiver 32b at the other end in FIG. 7). In addition, as shown in FIG. 7, the wide detection light from the light emitter 32a covers substantially the entire range of the opening of the holding member 14 in the open state. The packaging sheet 1 is transmissive, and the intensity of the light detected by the optical sensor 32 is set to such an extent that it can pass through the packaging sheet 1.

As shown in FIGS. 14 and 15 and FIG. 11 (a), when the packaging sheet 1 is placed at a predetermined position on the packaging table 2, the worker opens the package A to open the packaging table 2. Suppose that it is dropped into the hole 2a (step S1) and the start switch is operated (step S2). As described above, when the packaged object A is on the support base 3, the light emitting device 3 shown in FIGS.
When the detection light to at least two of the light receivers 32b among the detection light to the four light receivers 32b from 2a is blocked by the packaged object A, it is determined that it is a normal packaging operation (step S3). ). As a result, the process proceeds to step S4 and FIG.
10, the pair of holding arms 18 that have been operated to the open position are operated to the holding position side (see the state of FIG. 10), and the sponge member 18a of the holding arm 18 is pressed against the lateral side surface of the packaged object A. Then, the article to be packaged A is held by the support 3 and the lowering operation of the support 3 is started (step S).
5).

When the support 3 is lowered while holding the article A on the support 3 by the holding arm 18 as described above, the article A does not rise from the support 3. With the reliable lowering of the packaged object A, the auxiliary squeezing member 11 sequentially presses the lateral side of the packaged object A and the upper portion 1a of the packaging sheet 1 toward the center, so that the packaging sheet 1 is The upper side 1a of the packaging sheet 1 is squeezed to a small size by being securely pressed and brought into contact with the lateral side surface of the article to be packaged A.

As described above, the support base 3 is lowered, and the article to be packaged A passes the position of the holding member 14 as shown in FIG. In this case, four light receivers 32 shown in FIG.
In b, when the detection light from the light emitter 32a is received by all four light receivers 32b (step S6), it is determined that the packaged object A of the support base 3 has completely reached the lower side of the holding member 14. Then, the support 3 stops at the position shown in FIG. 10 (step S7). When the support base 3 stops at the position shown in FIG. 10, the pair of holding arms 18 are slightly opened (step S8), and the pair of holding members 14 advance, and the upper portion 1a of the packaging sheet 1 is sandwiched. Then, the packaged object A is wrapped in the packaging sheet 1 (step S9).

Next, the packaging sheet 1 by the disk cutter 28
Of the upper portion 1a of the packaging sheet 1 (step S10), blowing of the upper portion 1a of the packaging sheet 1 by the spray nozzle 34 (step S11), sticking of the adhesive tape 4 (step S12), and pressing of the adhesive tape 4 by the sponge member 16 (step S12). Step S13), opening operation of the pair of holding members 14 (Step S14), re-pressing of the sponge member 16 (Step S15), operation of the holding arm 18 to the open position (see the state of FIG. 9) (Step S16), support The package A is released from the platform 3 (step S17), and the support 3 is raised to the original position (step S18).

As described above, the single packaging is performed. When the single packaging is completed, the next packaging sheet 1 for packaging is pulled out and cut (step S19) to perform the initial packaging. Return to Then, when the next packaged object A is dropped into the opening 2a and the start switch is operated, the next packaging is performed from steps S3 and S4. By repeating the above operations, packaging can be performed continuously. it can.

(5) Next, as shown in step S19 of FIG. 15, in the drawing of the packaging sheet 1 performed after the end of one packaging,
The configuration of each mechanism will be described. Figures 1, 2 and 3
As shown in (a), the transparent packaging sheet 1 is wound in a roll shape, supported by a pair of freely rotatable support rollers 13, and a receiving table 35 is disposed below the cutter 33. The pedestal 35 has a plurality of receiving portions 3 protruding in a tongue shape.
The receiving portion 35a is provided with a recess 35b into which the cutter 33 enters, and the receiving portion 35a is set at a position slightly lower than the base side of the receiving base 35.

Next, a cutter 33 for cutting the packaging sheet 1
Will be described. As shown in FIGS. 1 and 3A, a support frame 36 is slidably supported on the upper side of the receiving table 35, and the support frame 36 has a flat plate shape having a width wider than the width of the packaging sheet 1. The cutter 33 is fixed. A plate-shaped pressing member 37 having a width approximately half of that of the packaging sheet 1 is provided on the front left and right sides of the cutter 33.
A rubber material 37a is attached to the lower surface of each of the pressing members 37, and the pressing members 37 are vertically movable on the support frame 36, and are downwardly moved by springs 37b. It is provided in a state biased to the side. As shown in FIG. 3A, the rubber member 37 a of the pressing member 37 is set to protrude below the lower end of the cutter 33 when the support frame 36 is raised.

Next, the pull-out mechanism 38 for pulling out the packaging sheet 1 onto the packaging table 2 will be described. 1 and 3
As shown in (a), a pair of support plates 39 are slidably supported along guide rails 2b provided on both right and left sides of the packaging table 2, and one support plate 39 extends over the left and right support plates 39. A support shaft 40 is erected, and five operation arms 41 are independently and swingably fitted to the support shaft 40, and a rubber plate 41a is fixed to the upper surface of the distal end of the operation arm 41. Above the operation arm 41, five receiving portions 42 having substantially the same width as the operation arm 41 are supported and fixed. In this case, the drawer mechanism 3 is located slightly above the receiving table 35 on the cutter 33 side.
8 are set so as to be positioned, and each of the operation arms 41 is urged toward the swinging side of the receiving portion 42.
The springs 43 are provided.

The support shaft 40 is rotatably supported by a support plate 39. Arms 40a are fixed to the left and right of the support shaft 40, and one rod 40 extends over the left and right arms 40a.
b is erected and fixed. A link 45 is provided over a fan-shaped gear 44 swingably supported by one support plate 39 and one arm 40a, and a motor 46 for driving the fan-shaped gear 44 is provided. The state shown in FIG. 3 (a) is a state in which the motor 46 is operated to push up the rod 40b, and the operating arm 41 is pulled down from the receiving portion 42. Is pulled down, the operation arm 41 is raised to the receiving portion 42 side by the urging force of the spring 43 to clamp the packaging sheet 1.

(6) Next, in step S19 in FIG. 15, the flow of operation of each mechanism for pulling out the packaging sheet 1 to the packaging table 2 for the next packaging operation will be described. The state shown in FIG. 3A is a state in which one package has been completed, and the drawer mechanism 38 moves to the cutter 33 side in order to pull out the next packaging sheet 1 for packaging into the packaging table 2. It is. As shown in FIG. 3B, when the drawer mechanism 38 reaches the holding position which is the position of the receiving table 35 and stops, the operation arm 41 and the receiving section 42 of the drawing mechanism 38 are moved between the receiving section 35a of the receiving table 35. Get into it. Next, the motor 46 of the pull-out mechanism 38 is operated, the rod 40b is pulled down, the operating arm 41 is raised to the receiving portion 42 by the urging force of the spring 43, and the operating arm 41 and the receiving portion 42 The end 1b is clamped.

Next, as shown in FIG. 4A, the pull-out mechanism 38 holding the end 1b of the packaging sheet 1 starts to move to the right in the drawing, and the drawing of the packaging sheet 1 to the packaging table 2 is started. You. As shown in FIG. 3A and FIG.
A support plate 47 is swingably supported up and down around the horizontal axis P2 at the end. The support plate 47 has substantially the same width as the support roller 13 and has a width wider than that of the packaging sheet 1, and a friction plate 48 made of urethane rubber is fixed at the end. The support plate 47 is lightly urged downward by a spring (not shown), and the tip of the friction plate 48 is in contact with the outer surface of one of the support rollers 13.

Thus, when the packaging sheet 1 is pulled out by the pull-out mechanism 38, the rotation of the support roller 13 is slightly braked by the contact action of the friction plate 48, and the rotation of the roll portion of the packaging sheet 1 and the rotation of the packaging sheet 1 are performed. The drawer is slightly braked. Therefore, the packaging sheet 1 is pulled out in a tensioned state without being loosened in the middle part, and the packaging sheet 1 is moved between the support roller 13 and the receiving table 35 by the friction plate 48 and the support plate 47. There is no depressing.

As shown in FIG. 4B, the packaging sheet 1 is transparent, but the marks 1c are printed along the longitudinal direction of the packaging sheet 1 at predetermined intervals corresponding to the type of the article A to be packaged. I have. As shown in FIG. 1, a reflection type optical sensor 50 having a light emitting device and a light receiving device is provided on a frame 49 fixed to the packaging table 2. With the above structure, the packaging sheet 1 is pulled out and the mark 1c of the packaging sheet 1 reaches the position of the optical sensor 50 as shown in FIG.
When the detection light from the light emitter of the optical sensor 50 reflects on the mark 1c and is detected by the light receiver of the optical sensor 50, the drawer mechanism 38 temporarily stops at that position.

In this case, as shown in FIG. 4B and FIG. 2, the tip of the friction plate 48 comes into contact with the outer surface of one of the support rollers 13 to rotate the roll portion of the packaging sheet 1 and to rotate the packaging sheet 1. Since the drawer is slightly braked, the roll-shaped portion of the packaging sheet 1 and the support roller 13 also stop immediately at the same time as the drawer mechanism 38 stops. This prevents the packaging sheet 1 from waving or wrinkling between the roll-shaped portion of the packaging sheet 1 and the pull-out mechanism 38.

Next, as shown in FIG.
The support frame 36 provided with 3 and the holding member 37 is operated to descend. In this case, as shown in FIG. 4B, since the rubber member 37a of the pressing member 37 protrudes below the lower end of the cutter 33, when the support frame 36 is moved down, first, the front and rear of the cutter 33 are moved. Individual holding member 3
7 presses and holds the packaging sheet 1 against the receiving portion 35a of the receiving base 35, and then the cutter 33 moves the concave portion 35 of the receiving portion 35a.
b, and cuts the packaging sheet 1 at a stretch.

When the cutting of the packaging sheet 1 is completed as described above, the support frame 36 is moved up to the original position, and the drawer mechanism 38 is moved rightward on the paper as shown in FIG. ), So that the center of the cut packaging sheet 1 is located at the position of the opening 2a of the packaging table 2 (see FIG. 1). Thereafter, the operation arm 41 of the drawer mechanism 38 is pulled down from the receiving portion 42, the end 1b of the packaging sheet 1 is released, and the single packaging sheet 1 cut to a predetermined length is It is placed at a predetermined position (the above corresponds to the operation means).

As shown in FIGS. 5 and 2, a plurality of convex portions 51 (corresponding to resistance portions) are fixed to the end of the packaging table 2. The surface of the convex portion 51 has a rough anti-slip treatment, and when the drawer mechanism 38 stops at the position shown in FIG. 5, the operation arm 41 and the receiving portion 42 of the drawer mechanism 38
Are set so that the convex portion 51 is located between them. Thus, even if the operation arm 41 of the drawer mechanism 38 is pulled down at the position shown in FIG. 5 and the end 1b of the packaging sheet 1 is released, the end 1b of the packaging sheet 1 is placed on the projection 51. Therefore, even if the air enters between the packaging sheet 1 and the packaging table 2 and the packaging sheet 1 is slightly lifted up, the packaging sheet 1 does not move from that position due to the contact action with the projection 51.

(7) The description in the above paragraphs (5) and (6) describes normal packaging and drawing out of the packaging sheet 1 after this packaging. Next, the packaging sheet 1 is placed on the packaging table 2. A state in which the packaging sheet 1 is pulled out from the initial state that has not been performed will be described. As shown in FIG. 14, when pulling out the packaging sheet 1 from the initial state, the start switch is operated without dropping anything into the opening 2a of the packaging table 2 (step S).
2). In this case, since there is nothing on the support 3 in FIG. 9, the detection light from the light emitter 32a of the optical sensor 32 is received and detected by all of the four light receivers 32b (step S3). (3) No packaged object A is detected. Therefore, in such a case, steps S3 to S
In step 20, the drawer mechanism 38, the cutter 33, and the like are operated, and the packaging sheet 1 cut to a predetermined length is placed at a predetermined position on the packaging table 2 as described in (5) above.

When the first packaging sheet 1 is placed on the packaging table 2 as described above, the description in the preceding paragraph (4), FIGS.
As shown in FIG. 5 and FIG. 11A, the article to be packaged A is dropped into the opening 2a of the packaging table 2 (step S1), and the start switch is operated (step S2). As described above, when the packaged object A is on the support base 3, the light emitting device 3 shown in FIGS.
When the detection light to at least two of the light receivers 32b among the detection light to the four light receivers 32b from 2a is cut off by the package A, the normal packaging in which the package A is on the support 3 is used. Is determined (step S3). As a result, the process proceeds to step S4 to perform packaging.
When one package is completed, the package sheet 1 is then pulled out to the packaging table 2 in step S19.

[Alternative Embodiment] In the embodiment of FIGS. 14 and 15, when the start switch is operated, the presence or absence of the package A on the support 3 shown in FIG. Of the packaging sheet 1 (step S4 and subsequent steps) or the withdrawal of the packaging sheet 1 (step S20) is performed. The drawer switch that can operate the drawer mechanism 38 independently to pull out the packaging sheet 1 is performed. (Not shown) may be provided separately from the activation switch.

When the above-mentioned drawer switch is provided, steps S1 to S3 shown in FIG.
The configuration is as shown in FIG. First wrapping sheet 1 before wrapping
Is pulled out to the packing table 2, the drawer switch is operated without dropping anything into the opening 2a of the packing table 2 (step S21). Since there is nothing on the support 3 and the optical sensor 32 does not detect the article A to be packaged, the process proceeds from step S23 to step S20 in FIG. 14, and only the drawer mechanism 38 operates to pull out the packaging sheet 1.

As described above, the first packaging sheet 1 is
Is placed in the opening 2a (step S1), and if the start switch is operated (step S22), the process proceeds to step S4 in FIG. 14 and the packaging is performed. After the end of the above, the next packaging sheet 1 for packaging is pulled out, and packaging can be repeatedly performed. As described above, it is assumed that the drawer switch is operated by mistake while the package sheet 1 is placed on the packaging table 2 and the article to be packaged A is dropped into the opening 2a. In this case, since the packaged object A on the support base 3 is detected by the optical sensor 32, the process proceeds from step S23 to step S22, and the drawer mechanism 38 does not operate.

The structure near the disk cutter 28 and the injection nozzle 34 in FIG. 12A may be configured as shown in FIG. As shown in FIG. 17, a guide plate 52 whose tip is slightly bent upward is fixed to the rear side of the pair of disc cutters 28, and a pair of upper and lower injection nozzles 34 is provided. Thereby, with the progress of the disk cutter 28 and the like, the upper portion 1a of the packaging sheet 1 sandwiched between the disk cutters 28 becomes
It is slightly lifted from the disk cutter 28 by the guide plate 52. Thereafter, compressed air is injected from the upper and lower injection nozzles 34, and the cut upper portion 1a of the packaging sheet 1 is reliably blown off.

In the embodiment shown in FIG. 2, the convex portion 51 is fixed to the packaging table 2, but the convex portion 51 may be provided in the pull-out mechanism 38. In this case, a frame (not shown) may be erected and fixed over the left and right support plates 39 of the drawer mechanism 38 shown in FIG. In the above-described embodiment, the packaging sheet 1 is fixed by the adhesive tape 4. However, after cutting the upper part 1a, the packaging sheet 1 is heated and the packaging sheet 1 is welded, so that the packaging sheet 1 is fixed. The present invention may be applied to an apparatus. FIG.
(A) The present invention is applied to a packaging apparatus in which the upper portion 1a of the packaging sheet 1 sandwiched by the sandwiching member 14 is heated and melted by a heater (not shown) instead of the disk cutter 28 as shown in FIG. May be applied. In the above-described embodiment, the packaging sheet 1 wound into a roll is pulled out by the pull-out mechanism 38 and cut to a predetermined length by the cutter 33. However, the packaging sheets 1 previously cut to a predetermined length and stacked are stacked. The present invention can also be applied to a packaging apparatus in which 1 is repeatedly pulled out by the drawer mechanism 38. In this case, the cutter 33 as shown in FIG. 1 becomes unnecessary.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a packaging device viewed from above.

FIG. 2 is a perspective view showing a receiving table, a support roller, and a convex portion in the packaging device viewed from above.

FIG. 3 is a side view showing a state in which the drawer mechanism is moved to a holding position side and holds an end of a packaging sheet.

FIG. 4 is a side view showing a state where the drawer mechanism starts and stops the drawing of the packaging sheet from the state of FIG. 3 and the cutter cuts the packaging sheet.

FIG. 5 is a side view showing a state in which the drawer mechanism has moved the packaging sheet cut after the state of FIG. 4 to a pulling position of the packaging table.

FIG. 6 is a perspective view showing a slide driving structure of a pair of holding members, and an arrangement state of a light emitter and a light receiver of an optical sensor.

FIG. 7 is a plan view showing a slide driving structure of a pair of holding members, an arrangement state of a light emitter and a light receiver of an optical sensor.

FIG. 8 is a plan view showing a state where a pair of holding members have been closed from the state shown in FIG. 7;

FIG. 9 is a front view of the vicinity of the support table, showing a state in which an article to be packaged is dropped into an opening of the packaging table and supported by the support table.

10 is a front view showing a state in which the left and right holding arms hold the article to be packaged from the state shown in FIG. 9 and the support base is operated to descend;

FIG. 11 is a perspective view showing a flow of packaging from dropping of a packaged object into an opening to narrowing of a packaging sheet by a holding member.

FIG. 12 is a perspective view showing the flow of packaging from the cutting of the upper part of the packaging sheet to the pressing of the adhesive tape by the sponge member.

FIG. 13 is a perspective view showing the flow of packaging from the operation of opening the holding member to the release of the packaged object, and the state in which packaging is completed.

FIG. 14 is a diagram showing a flow in the first half of control of the entire packaging.

FIG. 15 is a diagram showing a flow in the latter half of control of the entire packaging.

FIG. 16 is a diagram showing a control flow in the first alternative embodiment.

FIG. 17 is a perspective view showing the vicinity of a disk cutter and an injection nozzle in a second alternative embodiment.

FIG. 18 is a side view showing an operation state of a drawer mechanism in a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging sheet 1b End of packaging sheet 2 Packaging table 2a Opening of packaging table 38 Pull-out mechanism 41 Operation arm 51 Resistance part A A packaged object

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Satoshi Ito 64 Ishizukita-cho, Sakai-shi, Osaka Kubota Sakai Works Co., Ltd. (56) References JP-A-3-176321 (JP, A) JP-A-2- 19214 (JP, A) Japanese Utility Model Showa 56-97203 (JP, U)

Claims (1)

(57) [Claims] 1. A packaging sheet (1) of a predetermined length for mounting,
It includes packaged articles spherical (A) wrapping sack having an opening (2a) from falling is a (2), from above into the opening (2a) in
When the object to be packaged (A) is dropped, the packaging sheet (1) is squeezed.
And the packaged object (A) is wrapped in the packaging sheet (1)
A packaging device having a drawer mechanism (38) provided with an operation arm (41) for sandwiching an end (1b) of the packaging sheet (1), and a lateral portion of the packaging table (2). A position for holding the end (1b) of the packaging sheet (1) supported by the operating arm (41), and placing the held packaging sheet (1) on the opening (2a) of the packaging table (2). And operating means for reciprocatingly moving the drawer mechanism (38) over a drawer position at which the end (1b) of the packaging sheet (1) is separated from the operation arm (41) to the predetermined position. A resistance is applied to the wrapping sheet (1) separated from the operation arm (41) at the pull-out position, and
(1) A packaging device including a resistance portion (51) for suppressing movement .