JP2667611B2 - 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, for example, one disclosed in Japanese Patent Application Laid-Open No. 3-133710. In other words, a packaging table is provided with an opening into which a spherical object to be packaged falls into which the packaging sheet is placed, and the packaging sheet is placed on this packaging table and the object to be packaged is dropped into the opening from above. As a result, the packaging sheet is squeezed at the outer edge of the opening, and the object to be packaged is supported by the lower support base (58 in FIG. 1 of the above publication) while being wrapped in the packaging sheet. Next, as shown in FIGS. 2 and 5 of the above-mentioned publication, a pair of holding members (see FIG.
12 and 16) in the drawings and FIG. 5 are advanced to the packaged object side, and a narrowing operation is performed by sandwiching the upper portion of the packaging sheet.

In the structure of the above publication, the upper portion of the packaging sheet is sandwiched by the sandwiching member and then heated by a heater (20 in FIG. 5 of the publication) to melt and cut the upper portion of the packaging sheet. However, it has been proposed to use a cutter instead of the heater. in this case,
A cutter is laterally advanced along the upper surface of the sandwiching member sandwiching the upper portion of the packaging sheet to cut the upper portion. After that, the packaging sheet is fastened by heat welding or adhesive tape so as not to open, and one package is completed.

[0004]

When the above-described cutter is provided, the cutter advances along the upper surface of the holding member, and cuts by pressing the upper portion of the packaging sheet. As a result, the upper portion of the cut packaging sheet is carried out by being placed on the cutter, and when the cutter stops passing over the upper surface of the holding member, the upper portion of the packaging sheet falls from the cutter. However, since the upper part of the packaging sheet is cut by pressing with the cutter, the upper part of the cut packaging sheet may be cut into the cutter. In such a state, when the cutter passes through the upper surface of the holding member and stops, the upper portion of the packaging sheet does not fall off the cutter well and remains attached to the cutter. Therefore, if the upper portion of the packaging sheet remains attached to the cutter, the cutter may not be able to cut the upper portion of the packaging sheet properly in the next packaging step. SUMMARY OF THE INVENTION It is an object of the present invention to prevent a cutting failure in which an upper portion of a cut packaging sheet remains attached to a cutter when the upper portion of the packaging sheet is cut by a cutter.

[0005]

As described above, the feature of the present invention is to provide a cutter for advancing along the upper surface of a pair of holding members sandwiching the upper portion of the packaging sheet and cutting out the upper portion of the packaging sheet. In the packaging device according to the present invention, the following configuration is provided. That is, [1] a first injection nozzle that injects compressed air obliquely upward along the vicinity of the upper surface of the cutter after cutting the upper portion of the packaging sheet, and is located above the first injection nozzle and is viewed in plan. In the same direction as the injection direction of the first injection nozzle,
A second jet nozzle for jetting compressed air substantially horizontally is provided, and the first and second jet nozzles are configured to blow off the upper portion of the cut packaging sheet attached to the cutter. [2] In the configuration of the above item [1], control means for starting the injection of the second injection nozzle after a predetermined time has elapsed from the start of the injection of the first injection nozzle is provided.

[0006]

[Action]

[I] If the cutter 28 cuts off the upper part 1a of the packaging sheet as shown in FIG. 1 and FIG. 2, for example, as shown in FIG. 1 and FIG.
Compressed air is jetted from the jet nozzles 16 and 17, and the upper portion 1a of the packaging sheet attached to the cutter 28 is blown off.

In this case, the first lower part near the cutter 28
Since the jetting direction of the jetting nozzle 16 is set obliquely upward, the compressed air from the lower first jetting nozzle 16 slightly lifts the upper portion 1a of the packaging sheet adhering to the cutter 28, It is in a state of being slightly upwardly separated from the cutter 28. In this way, while lifting the upper portion 1a of the packaging sheet, the compressed air is jetted from the upper and lower first and second injection nozzles 16 and 17 vertically to the upper portion 1a of the packaging sheet, so that it adheres to the cutter 28. The upper part 1a of the packaging sheet is blown off without fail.

[II] When configured as in the preceding section [2],
After a lapse of a predetermined time from the start of the injection of the lower first injection nozzle, the injection of the upper second injection nozzle is started. As a result, only the compressed air of the lower first injection nozzle is injected into the upper portion of the packaging sheet until the injection of the upper second injection nozzle is started. The upper part of the packaging sheet attached to the cutter is reliably lifted from the cutter by the compressed air of the lower first spray nozzle without being obstructed by air.

[0009]

According to the first aspect of the present invention, by providing the first and second injection nozzles for blowing off the upper part of the packaging sheet, the next cutting is performed while the upper part of the cut packaging sheet remains attached. And the cutting failure by the cutter could be prevented beforehand. Thereby, the overall work efficiency of the packaging device can be improved. In this case, since the upper part of the packaging sheet attached to the cutter is blown off by the two spray nozzles while being lifted, the reliability of removing the upper part of the packaging sheet can be improved. According to this configuration, the upper portion of the packaging sheet attached to the cutter can be reliably lifted, so that the reliability of removing the upper portion of the packaging sheet can be further improved.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. (1) First, the flow of the entire packaging in the packaging apparatus of the present invention will be described based on FIGS. 7 (A) to 9 (C). FIG.
As shown in (a), after the previous packaging is completed, one packaging sheet 1 cut to a predetermined length is placed on the packaging table 2. Then, when the article to be packaged A is dropped into the opening 2 a of the packaging table 2, the article to be packaged A falls into the lower support table 3 while being wrapped in the packaging sheet 1. In this state, when an operator pushes a start switch (not shown), the support base 3 is lowered as shown in FIG. 7B, and the packaging sheet 1 is squeezed at the outer edge of the opening 2a. . In this case, the plurality of rubber plate-shaped auxiliary restricting members 11 are provided below the opening 2a.
Is provided so as to surround the auxiliary throttle member 1.
1 further squeezes the packaging sheet 1.

Next, the pair of plate-shaped holding members 14 and 15 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, and the upper portion 1a of the packaging sheet 1 is narrowed down. Thereby, the packaged object A is almost completely wrapped in the packaging sheet 1. Thereafter, as shown in FIG.
(Corresponding to a cutter) advances along the upper surfaces of the holding members 14 and 15, and the upper portion 1a of the packaging sheet 1 is cut off. Then, compressed air is injected from the first and second injection nozzles 16 and 17, and the upper portion 1 a of the packaging sheet 1 attached to the disk cutter 28 is blown off.

Next, as shown in FIG. 8B, the adhesive tape 4 cut to a predetermined length is placed over the upper end of the packaging sheet 1 and the ends of the sandwiching members 14 and 15, and As shown in (c), the adhesive tape 4 is pressed from above by the sponge member 25. Then, while the adhesive tape 4 is being pressed by the sponge 25, as shown in FIG. 9A, the pair of holding members 14 and 15 are operated to be opened, and the sponge member 25 is again pressed to the side of the object to be packaged A. Then, the adhesive tape 4 is surely adhered to the packaging sheet 1.

In this way, one wrapping is completed. After that, as shown in FIG. 9B, the support base 3 is switched to the sideways tilted posture, and the object A to be packaged on the support base 3 is changed. It is released to the slide 26 and collected. FIG. 9C shows the state of the packaged object A that has been packaged as described above.

(2) Next, the slide drive structure of the holding members 14, 15 will be described. As shown in FIGS. 4 and 6, a round bar-shaped first guide rail 5 and a plate-shaped second guide rail 6 are provided below the packaging table 2 on both sides of the opening 2 a. Boss portions 14a, 15a are fixed to one ends of the holding members 14, 15, respectively.
a and 15a are slidably fitted on the first guide rail 5 and the lateral side portion 1 on the opposite side of the holding members 14 and 15 is provided.
4b and 15b are mounted on the second guide rail 6 and bent to the lower side of the second guide rail 6.

A bracket 7 is fixed to a boss 14a of one of the holding members 14, and a double-acting air cylinder 8 is connected to the bracket 7. A balance arm 9 is swingably supported around a vertical axis P1 of the fixed portion, and a roller 9a at one end of the balance arm 9 is inserted into a concave portion of the bracket 7. A linking rod 10 is erected and connected between the other end of the balance arm 9 and the boss 15a of the other holding member 15.

With the above structure, when the air cylinder 8 in the expanded state is operated toward the contracted side as shown in FIGS. 5A and 5B, the holding member 14 on the right side of the paper slides to the left side of the paper. At the same time, the balance arm 9 swings clockwise in the drawing in conjunction with this operation. As a result, the link rod 10 is pulled rightward in the drawing, and the other holding member 15 is slid rightward in the drawing. Then, as shown in FIG. 5B, the upper portion 1a of the packaging sheet 1 is narrowed down by the pair of holding members 14 and 15.

Below the pair of holding members 14 and 15, there is provided a pair of auxiliary holding members 12 which swing in a direction perpendicular to the sliding direction of the holding members 14 and 15. FIG.
(B) As shown in (b) and FIG.
5, a pair of auxiliary holding members 12 are swingably supported around the longitudinal axis P2 of the fixed portion. The auxiliary pinching member 12 is provided with a long hole 12a in the shape of a letter, and a pair of rollers 14c provided on the back surface of the pinching member 14 are inserted into the long holes 12a so that the auxiliary pinching member 12 does not face downward. A supporting guide plate 13 is provided.

With this structure, the air cylinder 8 starts to contract from the state shown in FIG.
When the rollers 4 and 15 start approaching each other, the pair of opened auxiliary holding members 12 also starts approaching each other in conjunction with the advance of the roller 14c. In this case, the auxiliary holding member 12 starts to approach earlier than the holding members 14 and 15 and moves the upper portion 1a of the packaging sheet 1 to the center side, and FIG.
As shown in the figure, the holding members 14, 15 and the auxiliary holding member 12
Thereby, the upper portion 1a of the packaging sheet 1 is narrowed down almost completely.

(3) Next, as shown in FIG. 8A, the upper portion 1a of the packaging sheet 1 attached to the disc cutter 28.
The first and second injection nozzles 16 and 17 for blowing off with compressed air will be described. As shown in FIGS. 1 and 2, the first injection nozzle 16 is fixed to the lower side of the frame 22 that supports the disk cutter 28. As shown in FIG. 2, the jetting direction of the first jetting nozzle 16 passes through the overlapping portions of the pair of disk cutters 28 in a plan view, and is set obliquely upward in a side view as shown in FIG. As a result, the compressed air is jetted from the first jet nozzle 16 obliquely upward along the vicinity of the upper surface of the overlapping portion of the disk cutter 28.

The second injection nozzle 17 is fixed to a portion of the frame 22 above the first injection nozzle 16. As shown in FIG. 2, the ejection direction of the second ejection nozzle 17 is the same direction as the ejection direction of the first ejection nozzle 16 in a plan view (the direction passing through the overlapping portion of the pair of disc cutters 28 in the plan view). As shown in FIG. 1, it is set substantially horizontal in a side view.

As shown in FIG. 3, a pair of holding members 14,
The air cylinder 8 for 15 is operated to expand and contract by an air pump 18 and a switching valve 19. Between the air cylinder 8 and the switching valve 19, another supply path 21 is branched in parallel from a supply path 20 for operating the air cylinder 8 to the extension side (opening side of the holding members 14, 15). It is connected to the first injection nozzle 16. Then, another supply path 24 is branched from the supply path 21 and connected to the second injection nozzle 17. The supply path 24 is provided with an electromagnetically operated normally-closed open / close valve 23 (corresponding to control means). .

With the above structure, as shown in FIG. 2, when the disc cutter 28 advances from the right side of the paper to the left side of the paper, and the upper portion 1a of the packaging sheet 1 is cut off, the cut upper portion 1a is cut into the disc cutter 28. Often, it remains attached to the surface. After the disk cutter 28 stops, compressed air is supplied to the supply path 20 to expand the air cylinder 8, and when the opening operation of the holding members 14 and 15 is started, the compressed air in the supply path 20 is supplied. First via Road 21
It is also supplied to the injection nozzle 16.

In this case, since the on-off valve 23 remains in the closed position, compressed air is first injected from the first injection nozzle 16 as shown in FIG. Thus, the first injection nozzle 1
When the compressed air of No. 6 is jetted obliquely upward along the vicinity of the upper surface of the overlapping portion of the pair of disc cutters 28, the upper portion 1a of the packaging sheet 1 attached to the disc cutters 28 is slightly separated from the disc cutters 28. Can be lifted.

When a predetermined time T has elapsed from the start of injection of the first injection nozzle 16 as shown in FIG. 1, the opening / closing valve 23 of FIG. Begins to be injected. Thereby, the upper portion 1a of the packaging sheet 1 slightly lifted from the disk cutter 28 by the compressed air from the first jet nozzle 16 is blown off by the compressed air from the first and second jet nozzles 16 and 17. . And the air cylinder 8
Extend to the stroke end to hold the holding members 14 and 15
When the opening operation is completed and the switching valve 19 in FIG. 3 is returned to the neutral position, the injection from the first and second injection nozzles 16 and 17 also stops.

[Alternative Embodiment] In the above embodiment, the first and second spray nozzles 16 and
17 is fixed so that the disk cutter 28 and the first and second injection nozzles 16 and 17 move together, but the first and second injection nozzles 16 and 17 are fixed to the apparatus. The disk cutter 28 provided in the portion and cutting off the upper part 1a of the packaging sheet 1 is used for the first and second spray nozzles 1.
It may be configured such that the compressed air is injected from the first and second injection nozzles 16 and 17 after stopping at positions 6 and 17. Although the packaging sheet 1 is sealed with the adhesive tape 4 in the above-described embodiment, the packaging sheet 1 is heated to weld the packaging sheet 1 after the upper portion 1a is cut to seal the packaging sheet 1. The present invention may be applied to a simple packaging device.

Incidentally, reference numerals are provided 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 side view showing the vicinity of first and second injection nozzles, and FIG.
Showing the flow from the start of injection and the stop of injection of the second injection nozzle

FIG. 2 shows first and second jet nozzles, a disc cutter, when jetting is started from the first and second jet nozzles.
Perspective view near the holding member

FIG. 3 is a circuit diagram of an air cylinder for first and second injection nozzles and a holding member.

FIG. 4 is a perspective view showing a slide driving structure of a holding member.

FIG. 5 is a plan view showing an open state and a closed state of the holding member.

FIG. 6 is a vertical sectional front view of the vicinity of a holding member.

FIG. 7 is a perspective view showing a flow of packaging from the charging of the packaged object into the opening to the narrowing of the packaging sheet by the holding member.

FIG. 8 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. 9 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 where packaging is completed.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 packaging sheet 1a upper part of packaging sheet 2 packaging table 2a opening of packaging table 3 support table 14, 15 clamping member 16 first injection nozzle 17 second injection nozzle 23 control means 28 cutter T predetermined time A packaged object

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Satoshi Ito 64 Ishizukita-cho, Sakai-shi, Osaka Kubota Sakai Works Co., Ltd. (56) References JP-A-3-226421 (JP, A) JP-A-3- 226417 (JP, A)

Claims (2)

(57) [Claims] 1. A packaging table (2) for mounting a packaging sheet (1) and having an opening (2a) into which a spherical object (A) falls.
And the article to be packaged (A) is inserted into the opening (2a) from above.
When the packaging sheet (1) is dropped, the packaging sheet (1) is squeezed at the outer edge of the opening (2a), and the article to be packaged (A) is packaged (1).
And a support base (3) for supporting the packaged object (A) dropped into the opening (2a) from below while being wrapped in the packaging sheet (1), and a packaged object. A pair of clamping members (14), (15) which advances toward the support base (3) supporting (A) and clamps and narrows down the upper part (1a) of the packaging sheet (1) in the article to be packaged (A).
And the upper part (1a) of the packaging sheet (1) is sandwiched by the upper parts (1a) of the packaging sheet (1), and the upper part (1a) of the packaging sheet (1) is cut off. And a cutter (28), comprising: a first injection nozzle for injecting compressed air obliquely upward along the vicinity of the upper surface of the cutter (28) after cutting the upper part of the packaging sheet (1). (16) is located above the first injection nozzle (16), and in the same direction as the injection direction of the first injection nozzle (16) in a plan view,
In addition, the second injection nozzle (1) that injects compressed air substantially horizontally
7), the first and second injection nozzles (1
6) and (17), a packaging device configured to blow off the upper portion (1a) of the cut packaging sheet (1) attached to the cutter (28). 2. After a lapse of a predetermined time (T) from the start of injection of the first injection nozzle (16), the second injection nozzle (1).
The packaging device according to claim 1, further comprising a control means (23) for starting the injection of the item (7).