JPH06345015A - Wrapping apparatus - Google Patents

Abstract

PURPOSE:To obtain a wrapping apparatus which can gather up an upper part of a wrapping sheet by providing a compressed air jetting nozzle for pushing the upper part of the sheet which has dropped together with an object to be wrapped on a support table toward the center and a controlling part for jetting air when a holding member holds the upper part of the wrapping sheet. CONSTITUTION:When a wrapping sheet 1 is mounted on a wrapping table and an object A to be wrapped is dropped into an opening, the object A drops into a support table below while being wrapped by the wrapping sheet 1. With an actuation switch operated, the support table lowers so that the wrapping sheet 1 is gathered up on an outer rim of the opening. A pair of plate-shaped holding parts 14, 15 placed under the wrapping table proceed toward the wrapping sheet to gather up an upper part la of the wrapping sheet to have the object A wrapped. A pair of disk cutters 18 proceed along an upper face of the holding members 14, 15 to cut the upper part 1a of the wrapping sheet 1. Compressed air is jetted from two jet nozzles 16, 17 so that the upper part attached to the disk cutters 18 is blown off.

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 As a packaging apparatus as described above, for example, there is one disclosed in Japanese Patent Laid-Open No. 3-133710. This packaging apparatus is provided with a packaging table (7 in FIG. 1 of the publication) provided with an opening (8 in FIG. 1 of the publication) for placing a packaging sheet on which a packaging sheet is placed. , Put the packing sheet on this packing stand. Then, when the article to be packaged is dropped into the opening from above, the packaging sheet is squeezed at the outer edge of the opening, and the article to be packaged is wrapped in the packaging sheet and the lower support base (see FIG. 1 of the above publication). 58).

Next, as shown in FIGS. 2 and 5 of the publication, a pair of sandwiching members (see FIGS. 2 and 5 of the publication, which are opposed to each other on both lateral sides of the support base. 12 and 16) are advanced to the side of the article to be packaged, and the upper portion of the packaging sheet is sandwiched and narrowed down. In the structure of the above publication, after the upper portion of the packaging sheet is sandwiched by the sandwiching members, it is heated by a heater (20 in FIG. 5 of the publication) (corresponding to a cutting means) to cut the upper portion of the packaging sheet. The wrapping sheet is held so as not to open by welding by heating with a heater (corresponding to a sealing means), and one wrapping is completed.

[0004]

In the above-mentioned structure, the packaging sheet is wrapped in the packaging sheet by dropping the packaging object on the flat packaging sheet placed on the packaging table. Is narrowed down. Therefore, it is not enough to narrow down the packaging sheet just by dropping the packaged item, and even if the packaged item falls on the support base, the upper part of the packaging sheet may be opened in the front, rear, left, and right. Even if the upper portion of the packaging sheet is sandwiched by the pair of clamping members with the upper portion of the packaging sheet opened, the upper portion of the packaging sheet may not be narrowed down.

If the upper portion of the packaging sheet is not squeezed into a small size by the sandwiching member as described above, if the upper portion is to be cut and fastened, sufficient cutting and fastening cannot be performed, resulting in defective cutting and Poor fastening may occur. It is an object of the present invention to configure such that when the upper part of the packaging sheet is sandwiched and narrowed down by the pair of clamping members, the upper part can be narrowed down.

[0006]

A feature of the present invention is that the packaging apparatus as described above is configured as follows. That is, [1] when the upper portion of the packaging sheet dropped together with the article to be packaged onto the support base is pushed toward the center side to inject compressed air, and a pair of clamping members sandwich the upper portion of the packaging sheet. And a control means for injecting compressed air from the injection nozzle.

[2] In the structure of the above item [1], when the injection nozzle injects compressed air to the upper portion of the packaging sheet sandwiched by the pair of sandwiching members, after that, the injection of compressed air by the injection nozzle is stopped, and then again. The control means is configured so that compressed air is jetted from the jet nozzle to blow off the upper portion of the packaging sheet cut by the cutting means.

[0008]

[Action]

[I] According to the constitution described in [1] above, after the object to be packaged is wrapped in the packaging sheet and dropped into the support through the opening, the pair of clamping members in the open position begins to be operated to the closed side, and the packaging sheet When the upper part of the is sandwiched and starts to be narrowed, compressed air is jetted from the jet nozzle. As a result, the upper portion of the packaging sheet is sandwiched by the sandwiching member while the upper portion of the packaging sheet is pushed toward the center of the object to be packaged by the compressed air from the injection nozzle, and the sandwiching is assisted by the compressed air. The member can narrow down the upper part of the packaging sheet.

[II] When the upper part of the packaging sheet is cut off by the cutting means after the holding member has narrowed down the upper part of the packaging sheet, the cut off upper part may remain attached to the cutting means. Therefore, if the compressed air is again jetted from the jet nozzle after cutting the upper portion of the packaging sheet configured as in the above [2], the upper portion of the packaging sheet attached to the cutting means is blown off. Accordingly, it is possible to prevent a state in which the upper part of the cut packaging sheet remains in the cutting means and the upper part of the next packaging sheet is cut to cause a cutting failure.

Further, in the constitution of the above item [2], when the upper portion of the packaging sheet is sandwiched by the sandwiching member, the compressed air is jetted and then the jetting is temporarily stopped, and after the upper portion of the packaging sheet is cut next time. , The compressed air is being injected again. Therefore, compressed air can be saved rather than continuously ejecting compressed air from the sandwiching of the upper portion of the packaging sheet by the sandwiching member to the cutting of the upper portion of the packaging sheet by the cutting means.

[0011]

According to the first aspect of the present invention, the upper portion of the packaging sheet is sandwiched by the sandwiching member while the upper portion of the packaging sheet is pushed toward the center of the object to be packaged by the compressed air from the jet nozzle. As a result, the upper part of the packaging sheet can be narrowed down by the sandwiching member, and the cutting failure of the upper part of the packaging sheet and the fastening failure of the packaging sheet, which are performed thereafter, can be reduced.

According to the second aspect of the present invention, the upper portion of the cut packaging sheet is prevented from being cut next while the upper portion of the cut packaging sheet remains attached to the cutting means, and the cutting failure by the cutting means can be further reduced. it can. In this case, since the injection of the compressed air is temporarily stopped and then injected again, there is no waste of the compressed air and the power of the compressor for the compressed air or the like can be saved.

[0013]

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). Figure 7
As shown in (a), after the end of the previous packaging, one packaging sheet 1 cut into a predetermined length is placed on the packaging base 2. Then, when the article A to be packaged is dropped into the opening 2a of the packaging table 2, the article A to be packaged is dropped into the lower support table 3 while being wrapped by the packaging sheet 1. When an operator pushes a start switch (not shown) in this state, 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, a plurality of rubber plate-shaped auxiliary throttle members 11 are provided on the lower side of the opening 2a to be packaged A.
The auxiliary diaphragm member 1 is provided so as to surround the
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), it proceeds to the side of the packaging sheet 1 and narrows down the upper portion 1a of the packaging sheet 1. As a result, the article A to be packaged is substantially completely wrapped in the packaging sheet 1. Then, as shown in FIG. 8A, a pair of disc cutters 18
The (corresponding to cutting means) advances along the upper surfaces of the sandwiching members 14 and 15, and the upper portion 1a of the packaging sheet 1 is cut off. Then, the compressed air is jetted from the first and second jet nozzles 16 and 17, and the upper portion 1a of the packaging sheet 1 attached to the disc cutter 18 is blown off.

Next, as shown in FIG. 8B, an adhesive tape 4 (corresponding to a sealing means) cut into a predetermined length extends over the upper end of the packaging sheet 1 and the ends of the holding members 14, 15. Then, the sponge member 19 presses the adhesive tape 4 from above, as shown in FIG. Then, with the adhesive tape 4 being pressed by the sponge 19, as shown in FIG.
As shown in (a), the pair of sandwiching members 14 and 15 are opened and the sponge member 19 is again pressed to the side of the article A to ensure that the adhesive tape 4 is firmly attached to the packaging sheet 1. .

In this way, one wrapping is completed, and thereafter, as shown in FIG. 9B, the support base 3 is switched to the sideways tilted posture, and the article A to be packaged on the support base 3 is changed. It is released to the slide 20 and collected. The state of the packaged object A that has been packaged as described above is shown in FIG.

(2) Next, the slide driving structure of the holding members 14 and 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 2a. The boss portions 14a and 15a are fixed to one ends of the holding members 14 and 15, and the boss portions 14a and 15a are fixed.
a and 15a are slidably fitted onto the first guide rail 5, and the lateral side portion 14 on the opposite side of the holding members 14 and 15 is provided.
b and 15b are mounted on the second guide rail 6,
It is bent below the guide rail 6.

A bracket 7 is fixed to the boss portion 14a of one holding member 14, and a double-acting air cylinder 8 is connected to the bracket 7. The balance arm 9 is swingably supported around the vertically oriented axis P1 of the fixed portion, and the roller 9a at one end of the balance arm 9 is inserted into the recess of the bracket 7. The linking rod 10 is erected and connected across the other end of the balance arm 9 and the boss portion 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. The balance arm 9 is interlocked with this operation.
Oscillates clockwise in the page. As a result, the link rod 1
0 is pulled rightward on the paper surface, and the other holding member 15 is slid rightward on the paper surface. And FIG.
As shown in (b), by the pair of holding members 14 and 15,
The upper part 1a of the packaging sheet 1 is narrowed down.

Below the pair of holding members 14 and 15, there is provided a pair of auxiliary holding members 12 which swing in a direction orthogonal to the sliding direction of the holding members 14 and 15. Figure 5
As shown in (a), (b), and FIG. 6, the sandwiching members 14, 1
A pair of auxiliary holding members 12 are swingably supported around the vertical axis P2 of the fixed portion on the lower side of the fixed portion 5. The auxiliary holding member 12 is provided with an elliptical long hole 12a, and the pair of rollers 14c provided on the back surface of the holding member 14 are inserted into the long hole 12a so that the auxiliary holding member 12 does not face downward. A guide plate 13 for supporting is provided.

With this structure, the air cylinder 8 begins to contract from the state shown in FIG.
When 4 and 15 start to approach each other, the pair of opened auxiliary holding members 12 also start to approach each other in conjunction with the movement of the roller 14c. In this case, the auxiliary holding member 12 starts approaching earlier than the holding members 14 and 15, and the upper portion 1a of the packaging sheet 1 is moved closer to the center side, as shown in FIG.
As shown in FIG.
Thus, 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 disk cutter 18
The first and second injection nozzles 16 and 17 for blowing away the compressed air will be described. As shown in FIG. 2, the first injection nozzle 16 is fixed to the lower side of the frame 21 that supports the disk cutter 18. This first injection nozzle 1
The injection direction of 6 passes through the overlapping portions of the pair of disk cutters 18 in a plan view, and is set to be obliquely upward in a side view. 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 18.

In the frame 21, the first injection nozzle 16
The second injection nozzle 17 is fixed to the upper part of the. The jetting direction of the second jetting nozzle 17 is, as shown in FIG. 2, the same as the jetting direction of the first jetting nozzle 16 in plan view (the direction passing through the overlapping portions of the pair of disk cutters 18 in plan view), and the side surface. It is set to be substantially horizontal when viewed.

(4) Next, the relationship between the operation of the pair of holding members 14 and 15 and the injection of compressed air from the first and second injection nozzles 16 and 17 will be described with reference to FIG. Figure 2
And as shown in FIG. 8A, the disc cutter 18 and the first
And a frame 21 for supporting the second injection nozzles 16 and 17
Are located on the lateral sides of the holding members 14 and 15 in the initial state.

As shown in FIG. 7A, the opening 2 of the packaging table 2
After the object A to be packaged is dropped into a, the support base 3 starts to be lowered as shown in FIG.
1), as shown in FIG. 2, the first and second injection nozzles 16,
When the object A to be wrapped wrapped in the packaging sheet 1 descends in front of 17, compressed air is jetted from the first and second jet nozzles 16 and 17 (time point T2 in FIG. 1), and And the second
The upper part 1a of the packaging sheet 1 descending in front of the injection nozzles 16 and 17 is pushed toward the center of the article A to be packaged. Then, the injection of the compressed air from the first and second injection nozzles 16 and 17 is stopped (time T3 in FIG. 1), and the support base 3 is stopped after a while (time T4 in FIG. 1).

Next, as shown in FIGS. 2 and 7C, the pair of holding members 14 and 15 in the open position start to be operated to the closing side (time T5 in FIG. 1), and the holding members 14 and 15 and the drawing. 5
The auxiliary sandwiching member 12 shown in (a) sandwiches the upper portion 1a of the packaging sheet 1 and starts narrowing down, and after this, compressed air is jetted from the first and second jet nozzles 16 and 17 with a slight delay (Fig. 1 time point T6) (corresponding to control means).

Thus, the first and second injection nozzles 1
While holding the upper portion 1a of the packaging sheet 1 in front of 6, 17 toward the center of the article A to be compressed by the compressed air, the holding member 1
When the upper portion 1a of the packaging sheet 1 is sandwiched by 4, 15 and the auxiliary sandwiching member 12, the upper portion 1a can be narrowed down. Then, the first and second injection nozzles 1
The injection of compressed air from 6 and 17 is stopped (time T7 in FIG. 1), and after a while, the holding members 14 and 15 and the auxiliary holding member 12 are stopped (time T8 in FIG. 1).

Next, as shown in FIGS. 3 and 8A, the disc cutter 18 advances from the right side of the paper surface to the left side of the paper surface to cut off the upper portion 1a of the packaging sheet 1. And FIG.
Adhesion of the adhesive tape 4 as shown in (b), FIG.
The pressing with the sponge member 19 as shown in (c) is performed, and thereafter, as shown in FIGS. 3 and 9 (a), the holding members 14 and 15 and the auxiliary holding member 12 start to be opened (see FIG. 1 time point T9).

When the upper portion 1a of the packaging sheet 1 is cut out as described above, the cut upper portion 1a often remains attached to the disc cutter 18. Therefore,
As described above, when the holding members 14 and 15 and the auxiliary holding member 12 start to be opened (time T9 in FIG. 1),
And, as shown in FIG. 9A, compressed air is injected from the first and second injection nozzles 16 and 17 (at time T1 in the figure).
0) (corresponding to control means).

In this case, the compressed air of the first jet nozzle 16 is jetted obliquely upward along the vicinity of the upper surfaces of the overlapping portions of the pair of disc cutters 18, so that the packaging sheet 1 attached to the disc cutters 18 is ejected. The upper portion 1a is slightly lifted from the disc cutter 18, and the slightly lifted upper portion 1a of the packaging sheet 1 is blown away by the compressed air from the first and second injection nozzles 16 and 17.

When the upper portion 1a of the packaging sheet 1 is blown off as described above, the first and second injection nozzles 16 and 1
The injection of the compressed air from 7 is stopped (time point T11 in FIG. 1).
And the auxiliary holding member 12 stops at the original open position (time T12 in FIG. 1). Then, as shown in FIG. 9B, the packaged object A is discharged to the slide 20, and the support base 3 is moved up to the original position shown in FIG. 7A. .

(5) A holding member 1 having a shape as shown in FIGS. 5 (a) and 5 (b), like the packaging device in the embodiment of the present invention.
4 and 15, the auxiliary holding member 12, and a pair of disk cutters 18 as shown in FIG.
As shown in 0, when the support base 3 is lowered and the holding members 14, 1
5, the first and second injection nozzles 16,
When the upper part 1a is cut by the disk cutter 18 and the adhesive tape 4 is attached without ejecting compressed air from 17, the part 1b of the packaging sheet 1 jumps out to the disk cutter 18 side as shown in FIG. There were cases.

Therefore, in the packaging apparatus according to the embodiment of the present invention, as shown in FIGS. 1 and 2, when the support base 3 is lowered and the holding members 14 and 15 are closed, the first and second injection nozzles 16 are provided. , 17 injecting compressed air to the packaging sheet 1
When the disc cutter 18 side portion of the disk is pushed to the center side of the article A to be packaged, when the disc cutter 18 cuts the upper portion 1a and the adhesive tape 4 is attached, as shown in FIG. Part 1b of packaging sheet 1
9 does not jump out to the side of the disk cutter 18, and
The packaging does not pop out as shown in (c).

[Other Embodiments] In the above-described embodiment, compressed air is injected from only one direction of the first and second injection nozzles 16 and 17 when the support base 3 is lowered and the holding members 14 and 15 are closed. However, in addition to the first and second injection nozzles 16 and 17, four or eight injection nozzles are provided so as to surround the front, rear, left, and right of the upper portion 1a of the packaging sheet 1, and the support base 3 is provided.
The compressed air is jetted from the first and second jet nozzles 16 and 17 and the compressed air is jetted from the plurality of jet nozzles at the same time when descent is performed and the holding members 14 and 15 are closed. Good.

In the above embodiment, the first and second jet nozzles 16 and 17 are fixed to the frame 21 of the disc cutter 18, and the disc cutter 18 and the first and second jet nozzles 16 and 17 are fixed.
The disk cutter 18 is formed by moving the upper portion 1a of the packaging sheet 1 by providing the first and second injection nozzles 16 and 17 described above on the fixed portion of the packaging device, while being configured to move together with 17. However, the first and second injection nozzles 16 and 17
, And then the first and second injection nozzles 1
It may be configured such that compressed air is ejected from 6, and 17. In the above-mentioned embodiment, the packing sheet 1 is made of the adhesive tape 4.
However, the present invention may be applied to a packaging device that seals the packaging sheet 1 by heating the packaging sheet 1 to fuse the packaging sheet 1 after cutting the upper portion 1a. .

It should be noted that reference numerals are added to 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 operation for raising and lowering a support base, an operation for opening and closing a holding member, a first operation.
And a diagram showing a temporal relationship of a compressed air injection operation from the second injection nozzle.

FIG. 2 is a perspective view showing the vicinity of the first and second injection nozzles and the holding member when the holding member is operated to the closed position.

FIG. 3 is a perspective view showing a state in which cutting of the upper portion of the packaging sheet has been completed from the state shown in FIG. 2 and the upper portion of the packaging sheet attached to the disc cutter has been blown off.

FIG. 4 is a perspective view showing a slide drive 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 the holding member.

FIG. 7 is a perspective view showing a flow of packaging from insertion of an object to be packaged into an opening to narrowing down of a packaging sheet by a holding member.

FIG. 8 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. 9 is a perspective view showing the flow of packaging 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. 10 is a perspective view showing the vicinity of the holding member and the disk cutter when compressed air is not jetted from the first and second jet nozzles when the holding member is operated to the closed position.

FIG. 11 is a perspective view showing a state of an article to be packaged when the packaging is performed in the state of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Packaging sheet 1a Upper part of packaging sheet 2 Packaging table 2a Opening of packaging table 3 Support table 4 Sealing means 14,15 Clamping member 16,17 Injection nozzle 18 Cutting means A Packaged object

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Satoshi Ito 64 Ishizukita-machi, Sakai City, Osaka Prefecture Kubota Sakai Factory Co., Ltd.

Claims (2)

[Claims] 1. A packaging table (2) for placing a packaging sheet (1) and having an opening (2a) through which an object (A) to be packaged falls, and the packaging table (2) is packaged into the opening (2a) from above. When the article (A) is dropped, the packaging sheet (1) is squeezed at the outer edge of the opening (2a) to wrap the article (A) to be packaged in the packaging sheet (1), and at the same time, the packaging sheet. A support base (3) for supporting from below the packaged object (A) that has fallen into the opening (2a) while being wrapped in (1), and a support platform (3) supporting the packaged object (A). A pair of clamping members (14), (15) that move to the side and clamp and narrow down the upper part (1a) of the packaging sheet (1) in the article to be packaged (A).
And a cutting means (18) for cutting off the upper part (1a) of the packaging sheet (1) sandwiched by the pair of clamping members (14), (15), and the packaging sheet cut off from the upper part (1a) ( A packaging device comprising a sealing means (4) for fastening the upper end of (1), wherein the packaging sheet (1) is dropped on the support base (3) together with the article to be packaged (A). An injection nozzle (16) for injecting compressed air that pushes the upper portion (1a) toward the center side,
(17) and the pair of sandwiching members (14), (15) inject compressed air from the injection nozzles (16), (17) when sandwiching the upper part (1a) of the packaging sheet (1). A packaging device provided with a control means for controlling the packaging device. 2. The pair of holding members (14), (15)
When the injection nozzles (16) and (17) inject compressed air into the upper part (1a) of the packaging sheet (1) sandwiched by the, the injection air of the injection nozzles (16) and (17) is injected thereafter. Stop and again the injection nozzle (16),
(17) Compressing air is jetted from the cutting means (1
8. The packaging device according to claim 1, wherein the control means is configured to blow off the upper part (1a) of the packaging sheet (1) cut by 8).