JP3073892B2 - 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 an article to be packaged (for example, vegetables such as lettuce and cabbage, or fruits such as melon and apple).
Is a packaging device for agricultural products wrapped in a packaging sheet,
More specifically, an opening is formed in a packaging table for placing a packaging sheet for the packaged object, and an opening for charging the packaged object is formed below the opening. A wrapping mechanism for wrapping the packaged object with the packaging sheet when the packaged object placed on the packaging sheet is lowered to a predetermined position below the opening together with the support base, and the packaged object. Is provided with a non-contact type detecting means for detecting that the package has been lowered to a predetermined position, and a pair of holding members for holding a narrowed portion of a packaging sheet wrapping the package, and the package has been lowered to a predetermined position. The present invention relates to a packaging apparatus provided with control means for operating the pair of holding members based on a detection result detected by the non-contact displacement detection means.

[0002]

2. Description of the Related Art As a packaging apparatus as described above, there is, for example, one disclosed in Japanese Patent Application Laid-Open No. 6-156414. In this packaging apparatus, an optical sensor including a light emitting device and a light receiving device is arranged to detect whether or not the article to be packaged has dropped to a predetermined position.

[0003]

However, as the package descends together with the support, the detection light of the optical sensor is interrupted by the package, and the detection light again passes through the packaging sheet, thereby causing the packaging sheet to fall. Even when it is assumed that the package has been lowered to a predetermined position, when packaging an object to be packaged having a thin projection on the upper surface (for example, lettuce), the stem of the lettuce must remain protruding. There is a case where the stem is sandwiched by a pair of sandwiching members. Then, the cutting of the narrowed portion may not be performed properly. It is an object of the present invention to provide a packaging apparatus that can change the work order even when a stem is sandwiched, clamp the stem without sandwiching the stem, and satisfactorily perform the subsequent work form.

[0004]

[MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
The structural features of the present invention adopted in claim 1 are described in claim 1.
The packaging table on which the packaging sheet for the
An opening for charging the packaged object is formed, and the opening
A support stand that receives the packaged item below the
And an elevating mechanism for lowering and placing on the packaging sheet.
The packaged object together with the support to a predetermined position below the opening.
Wrap the packaged object with the packaging sheet when descending with
The wrapping mechanism and the object to be packaged
Non-contact type displacement detecting means for detecting that
To hold the narrowed part of the packaging sheet that wraps the object
A pair of holding members, and the packaged object descends to a predetermined position.
Is detected by the non-contact type displacement detecting means.
Control means for operating the pair of holding members based on the result.
A packaging device is provided with a stage, a clamping completion detection means for detecting that said pair of holding members is sandwiched only narrowing portion of said wrapping sheet is provided, if any clamping completion signal from the clamping completion detecting means and the Refine packaging sheet
A cutting operation for cutting off the upper side of the holding portion is started, and if the holding completion signal is not generated within a predetermined time after the detection signal from the non-contact type displacement detecting means, the pair of holding members are temporarily set to the standby position. Then, with the support pedestal lowered for a predetermined time, the holding member is moved to the closed side.
And the signal of the completion signal of the
The control means is configured to determine the presence or absence again
It is. In addition, as described in claim 2, the packaged object
The packaged object into the packaging table on which the packaging sheet to be placed is placed
Form an opening and place the packaged item below the opening.
A support base for receiving and an elevating mechanism for elevating the support base
Provided, and the packaged object placed on the packaging sheet is
When descending to a predetermined position below the opening with
A wrapping mechanism for wrapping the packaged object with a wrapping sheet,
A non-detection device detects that the packaged object has dropped to a predetermined position.
Contact type displacement detecting means, and a package enclosing the object to be packaged
A pair of holding members for holding the narrowed part of the sheet
The fact that the packaged object has been lowered to a predetermined position
Based on the detection result detected by the tactile displacement detection means,
Packaging provided with control means for operating a pair of holding members
In the apparatus , the pair of holding members may be provided on the packaging sheet.
A pinch completion detection that detects that only the narrowed part has been pinched
Output means, and a pinch completion signal from the pinch completion detection means.
If there is a number, the upper side of the narrowed part of the packaging sheet
Cutting work to cut and adhesive tape after cutting
At the end of the non-connection
Occurs within a predetermined time after the detection signal from the tactile displacement detection means
If not, the pair of holding members are once retracted to the standby position.
After that, the support table is lowered for a predetermined time.
In this, while operating the holding member to the closing side, the
After the sandwiching member sandwiches the upper part of the packaging sheet,
Raise the support slightly before starting the cutting operation
The control means may be configured to perform the control.

[0005]

In order to judge whether or not the clamping state by the clamping member has been performed without clamping the stem, a clamping completion detecting means is provided. If a completion detecting signal is generated from the clamping completion detecting means,
It can be confirmed that the stem has not been bitten, and if there is no completion detection signal, it can be determined that the stem is in an abnormal state such as biting. In this case, the reason why the predetermined time is set after the detection completion signal from the non-contact type displacement detecting means is that the time from the start to the end of the holding operation of the holding member can be assumed. Then, when the completion detection signal is not received, the holding member is once retracted, the packaged object is further lowered for a predetermined time, and the holding operation by the holding member is performed again. The reason why the to-be-packaged object is lowered for a predetermined time is that the height of the stem and the like is considered to have little individual difference.

[0006]

By adopting such a work sequence, the subsequent work is less likely to be continued while the stem is being held, which leads to a reduction in work efficiency such as discarding the packaged material. Can be avoided.

[0007]

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 with reference to FIGS. 6 (a) to 8 (c) and FIGS. As shown in FIG. 6A, after the previous packaging is completed, one packaging sheet 1 cut to a predetermined length is placed on the packaging table 2 (Step S28). Then, when the worker drops the article to be packaged A into the opening 2a of the packaging table 2, the article to be packaged A falls into the lower support table 3 while being slightly wrapped by the packaging sheet 1 (step S1).

Thereafter, when a start switch (not shown) is operated (step S2), a pair of holding arms 18 provided on the left and right sides of the support 3 are moved to the side of the package A as shown in FIG. The package A is held on the support 3 by the holding arm 18 (step S3), and the support 3 and the holding arm 18 are moved down (step S3).
4) A stop operation is performed at a predetermined position (step S8). In this case, a plurality of rubber plate-shaped auxiliary drawing members 11 as a wrapping mechanism are provided below the opening 2a so as to surround the packaged object A, and the auxiliary drawing member 11 further improves the packaging sheet 1. Squeezed.

Next, a pair of plate-like holding members 14 arranged below the packaging table 2 are shown in FIGS. 6 (c) and 7 (a).
As shown in (1), the sheet proceeds to the packaging sheet 1 side (step S10), 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. 7A, 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 (Step S19). Compressed air is injected to blow off the upper portion 1a of the packaging sheet 1 attached to the disk cutter 28 (step S20).

[0010] Next, as shown in FIG. 7 (b), the adhesive tape 4 whose front end is sandwiched by a pair of upper and lower holding members 13, pulled out to a predetermined length, and cut is carried by the holding member 13. The adhesive tape 4 is placed over the upper end of the packaging sheet 1 and the end of the holding member 14 (step S21), and the adhesive tape 4 is pressed from above by the sponge member 16 as shown in FIG. 7C (step S22). 8 with the adhesive tape 4 pressed by the sponge member 16.
As shown in (a), the pair of holding members 14 are opened (Step S23), and the sponge member 16 is again pressed against the article A (Step S24), so that the adhesive tape 4 is securely attached to the packaging sheet 1. So that it adheres to

Thereafter, as shown in FIG. 8 (b), the holding arm 18 is opened to the left and right (step S25), the support base 3 is operated to lie down, and the article A to be packaged is released to the slide 15 and collected. (Step S26). One package is completed as described above, and the state of the packaged object A after the packaging is shown in FIG. And the support 3
Is again raised to the original position shown in FIG. 6A (step S27), and the next packaging sheet 1 for packaging is pulled out and cut (step S28).

(2) Next, the support 3 shown in FIG.
Will be described. As shown in FIG. 1, a first support member 6 is vertically slidably mounted on a pair of left and right guide rails 5 arranged below the opening 2 a of the packaging table 2. Second fixed on top
The support 3 is elastically supported by the support member 17 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. An operation arm 8 that can swing around the horizontal axis P1 of the fixed portion.
Is connected to the first support member 6 with a pin and a long hole structure, and is provided with an operation cylinder 9 as an elevating mechanism for driving the operation arm 8 to swing up and down.

As shown in FIG. 1, a pair of holding arms 18 are swingably supported around a horizontal axis P3 at both left and right ends of a second support member 17. A horizontally long sponge member 18a is attached to an upper end 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 first support member 6 is provided with an operation arm 21 that is switched by a motor 20 between a vertical position shown in FIG. 1 and a horizontal position shown in FIG. 2. Both ends of the operation arm 20 and left and right holding arms 18 are provided. Is connected by a link 22.

(3) Next, the slide driving structure of the pair of holding members 14 in FIGS. 6 (c) and 7 (a) will be described. As shown in FIGS. 4 and 5, 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. A boss 14a is fixed to one end of the holding member 14, and the boss 14a is slidably fitted on the first guide rail 23, and the lateral side 14b on the opposite side of the holding member 14 is connected to the second guide rail. It is mounted on the 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 longitudinal axis P4 of the fixed portion, and a roller 27a at one end of the balance arm 27 is provided.
Is inserted into the recess of the bracket 25. Then, the other end of the balance arm 27 and the boss portion 14 of the other holding member 14 are provided.
A linking rod 29 is erected and connected to a.

With the above structure, as shown in FIGS. 4 and 5, when the air cylinder 26 in the extended state is operated to the contracted side, the holding member 14 on the right side of the paper slides to the left of the paper. At the same time, the balance arm 27 swings clockwise in FIG. As a result, the link rod 29 is pulled to the right in the drawing, and the other holding member 14 is slid to the right in the drawing. Then, as shown in FIG. 7A, the upper portion 1 a of the packaging sheet 1 is narrowed down by the pair of holding members 14.

As shown in FIG. 5, 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 supported on the lower side of the holding member 14 so as to be swingable around the longitudinal axis P2 of the fixed portion. The auxiliary holding member 30 is provided with a rectangular long hole 30a, and a pair of rollers 14c provided on the back surface of the holding member 14 is inserted into the long hole 30a.
There is provided a guide plate 10 for supporting so that it does not face downward.

With this structure, when the air cylinder 26 starts to contract from the state shown in FIG. 5 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 its stroke end, the holding member 14 and the auxiliary holding member 3
0 is almost completely closed, and the upper portion 1a of the packaging sheet 1 is narrowed down.

For the air cylinder 26, a clamping completion detecting sensor 32 for detecting a state in which the cylinder 26 contracts and the pair of clamping members 14, 14 clamp only the upper portion 1a of the packaging sheet 1 is provided. Based on the detection result of No. 32, it can be seen that the holding state of the holding members 14, 14 has been completed. This pinch completion detection sensor 32
For example, a contact type sensor such as a limit switch or a non-contact type sensor represented by light or the like can be used.

(4) Next, the optical sensor 31 as a non-contact type displacement detecting means disposed above the holding member 14 will be described. As shown in FIGS.
A light emitter 31a is disposed near one corner on the rear side of one holding member 14, and four light receivers 31b are connected to the other holding member 14.
The one light emitter 31a and the four light receivers 31 are arranged at predetermined intervals near the opposite corner on the rear side.
b constitutes an optical sensor 31.

The light emitting device 31a projects the detection light with a wide range over a predetermined range in the horizontal direction (a range from the light receiving device 31b at one end to the light receiving device 31b at the other end in FIG. 5). As shown in FIG. 5, the wide range of the detection light from the light emitter 31a is set so as to cover substantially the entire range of the opening of the holding member 14 in the open state. The packaging sheet 1 has transparency, and the intensity of the detection light of the optical sensor 31 is set to such an extent that it can pass through the packaging sheet 1.

(5) As shown in FIGS. 6 (c) and 7 (b), the pair of holding members 14 narrow the packing sheet 1 from the lowering operation of the support base 3 as shown in FIG. 6 (b). The control flow up to this point will be described. FIG. 14 and FIG.
As shown in FIG.
a (step S1), and when the start switch is operated (step S2), the pair of holding arms 18 which have been operated to the holding release position as shown in FIG.
Is operated toward the holding position, the sponge member 18a of the holding arm 18 is pressed against the lateral side surface of the packaged object A (see the state in FIG. 2), and the packaged object A is held on the support base 3 (step S3). ). Next, the lowering operation of the support base 3 is started by the operation cylinder 9 (step S4).

As described above, when the support 3 is lowered while the package A is held on the support 3 by the holding arm 18, the package A does not rise from the support 3. Then, as the to-be-packaged product A is securely lowered, the auxiliary squeezing member 11 sequentially presses the lateral side surface of the to-be-packaged product A and the upper portion 1a of the packaging sheet 1 to the center side. Pressed firmly on the lateral side of the package A,
The upper part 1a of the packaging sheet 1 is narrowed down to a small size.

When the lowering of the support 3 is started as described above, a timer (not shown) starts counting the set time T ₁ (step S5). Then, after the end of the counting set time T ₁ (step S6), and the four photodetectors 31b shown in FIG. 5, the light emitter all four detection light from 31a photodetector 31b is received (step S7), and The support base 3 is stopped at that position (step S8).
In this case, when the support base 3 supporting the packaged object A is stopped at the position shown in FIG. 1 from a stopped state, the sponge member 18a at the upper end of the holding arm 18 is moved from the start of the lowering of the support base 3. the clamping member 14 and the time required to reach the lower side of the auxiliary clamping member 30 may be the setting of the aforementioned time T _1.

Thus, when the small package A having a lower height than the holding arm 18 is dropped on the support 3 (in FIG. 1, the smaller the package A on the support 3 than the upper end of the package A).
In a state where the sponge member 18a of the holding arm 18 is at a higher position), when the lowering operation of the support 3 is started, the sponge member 18a of the holding arm 18 is moved ahead of the sponge member 18a of the holding arm 18.
The upper end of the packaged object A is the holding member 14 and the auxiliary holding member 30
And the sponge member 18a of the holding arm 18
Are still left above the holding member 14 and the auxiliary holding member 30.

In this case, since the counting of the set time T ₁ by the timer has not been completed yet, the detection light from the light emitting device 31a passes through the upper portion 1a of the packaging sheet 1 and is not detected.
Even if light is received by all of the light receivers 31b, this state is ignored and the operation of lowering the support 3 is continued. When the support base 3 further lowering operation has been counted for the set time T ₁ is completed, since the sponge member 18a of the holding arm 18 reaches the bottom side of the clamping member 14 and the auxiliary clamping member 30,
Immediately after the count of the set time T _1, the light emitter 31
Based on the state in which the detection light from “a” is received by all four light receivers 31b, the support 3 stops at that position.

Conversely, when a packaged object A having a normal size higher than the holding arm 18 is dropped on the support 3 (FIG. 1).
When the lowering operation of the support base 3 is started in a state where the upper end of the packaged object A on the support base 3 is higher than the sponge member 18a of the holding arm 18 as shown in FIG. The sponge member 18a reaches the lower side of the holding member 14 and the auxiliary holding member 30 before the upper end of the packaged object A, and the upper end of the packaged object A is still above the holding member 14 and the auxiliary holding member 30. It remains in the state.

In this case, the counting of the set time T ₁ by the timer has been completed, but since the detection light from the light emitter 31a is blocked by the package A, the lowering operation of the support 3 is continued as it is. You. Then, the support 3 is further lowered, and the detection light from the light emitting device 31a passes through the upper portion 1a of the packaging sheet 1 and all four light receiving devices 31b
, The upper end of the article to be packaged A reaches the lower side of the holding member 14 and the auxiliary holding member 30, and the support 3 stops at that position. As described above, regardless of the size of the packaged product A, both the upper end of the packaged product A and the sponge member 18a of the holding arm 18 are supported in a state where they reach the lower side of the holding member 14 and the auxiliary holding member 30. The lowering of the platform 3 is stopped.

As described above, the support table 3 corresponds to FIGS.
When stopped at the position (c), the pair of holding arms 18 are slightly opened as shown in FIG. 1 (step S).
9), the pair of sandwiching members 14 advance toward the packaged object A side, sandwich the upper portion 1a of the packaging sheet 1 (step S10), and the packaged product 1 is wrapped in the packaging sheet 1.

However, as described above, the optical sensor 31 and the tie
The object A is lowered to a predetermined position by the two devices
Is still detected, for example,
When A is a lettuce or the like, the stem portion is
Smell when not detected by lettuce and lettuce itself is large
The pinching members 14 and 14
Can happen. So, in this case,
Take control form. That is, first, the holding members 14,
When performing the closing operation, it is necessary to complete
Hit time T _TwoAnd the set time T_TwoHas passed
If so, there is a detection signal from the pinch completion detection sensor 32
It is determined whether or not it is (steps S11, S12).

When the holding members 14, 14 hold the stem and the holding completion detecting sensor 32 does not detect that the holding end has reached the contracted end, the support 3 is lowered again. In this case, the holding members 14, 14 are once retracted, and the support 3 is lowered (steps 13, 14). In this case, in order to control the lowering of the support 3, a timer control is performed, and the lowering is stopped after the set time T _{3 has} elapsed (step 16). Since setting time T ₃ is only time descends stems, without too much long period of time required, since would not relate to the size of the packaged articles A, by setting the descending stop timing at time management It seems that there are few problems. And again, the pair of holding members 1
By performing the closing operation of the sensors 4 and 14, it is determined whether to repeat the above operation or proceed to the next step based on the detection result of the sandwiching completion detection sensor 32 (steps 17 and 18).

When the upper portion 1a of the packaging sheet 1 is sandwiched between the pair of sandwiching members 14, the packaging sheet 1 is entirely lifted toward the sandwiching member 14 with this sandwiching, and the packaged object A itself is separated from the packaging sheet 1. The packaged product 1 is pulled up together, and the packaged object 1 is tightened by the packaged sheet 1. The wrinkles of the packaged sheet 1 are entirely extended, so that clean packaging can be expected.

In this case, the pair of holding arms 18 are slightly opened to move the pair of holding members 14 to the closing side in a state where the sponge members 18a of the holding arms 18 are separated from the article A and the packaging sheet 1. Also, the lifting of the packaging sheet 1 and the packaged object A is not hindered by the sponge member 18a of the holding arm 18, and the sponge member 18a of the holding arm 18 does not rub against the packaged object A. The package A is not damaged.

As shown in FIG. 3, when the upper portion 1a of the packaging sheet 1 is sandwiched by the sandwiching member 14, the object A to be packaged slightly rises from the support 3 as the packaging sheet 1 is pulled up. Therefore, after the upper portion 1a of the packaging sheet 1 is sandwiched by the sandwiching member 14, FIGS.
As shown in Step 19 of FIG. 4, the disk cutter 28 moves the upper portion 1 a of the packaging sheet 1 along the upper surface of the holding member 14.
To the operating cylinder 9 and the operating arm 8
As a result, the first and second support members 6 and 17 and the support base 3 are slightly raised and the springs 7 of the support base 3 are compressed, so that the packaged object A is pressed against the back surface of the holding member 14. After the operation of raising the support 3, the cutting of the upper portion 1 a of the packaging sheet 1 by the disk cutter 28 ends.

Then, after the above operation, the upper part 1a of the packaging sheet 1 is blown off by the injection nozzle 12 (step S20), and the adhesive tape 4 is attached (step S2).
1), pressing of the adhesive tape 4 by the sponge member 16 (step S22), opening operation of the pair of holding members 14 (step S23), and pressing again of the sponge member 16 (step S22)
24), opening operation of the holding arm 18 to the holding release position (the original state shown in FIG. 2) (Step S25), release of the packaged object A from the support 3 (Step S26), Ascending to the position (step S27), drawing out and cutting the next packaging sheet 1 (step S28) are sequentially performed.

In the control process from step 7 to step 18 in the above-described embodiment, the following process may be adopted. That is, the optical sensor may employ a control mode in which the distance is calculated based on the reflected light from the packaged object A and the presence of the packaged object A is specified. In this case, the light-emitting device and the light-receiving device are provided side by side, and they are rocked and rotated by a certain angle so that the stem and the like can be reliably captured. Alternatively, a control mode in which the height of the packaged object A is detected by an optical sensor to lower the support 3 by that height or convert the height into time and lower the support 3 by that time is used. May be taken. In this case, the light sensor may be configured such that a plurality of light emitters and light receivers are vertically arranged on both sides of the article A to be packaged, or scanning is performed by one sensor.

Instead of the above-mentioned disc-shaped cutter 28, a cutter having the following configuration may be employed. That is, as shown in FIG. 9, the movable table 34 may be provided with a plate-shaped cutting blade 33. The cutting blade 33 is provided so as to be inclined with respect to the traveling direction of the moving table 34. Also, as shown in FIG.
A cutting blade 35 having a substantially orthogonal posture is added to the cutting blade 33,
The upper portion 1a of the packaging sheet 1 guided by the cutting blade 33 may be cut. Further, as shown in FIG. 11, a plate-shaped cutting blade 36 and a disc-shaped rotary blade 28 may be combined. By adopting the above configuration,
Cutting pieces of the packaging sheet 1 can be prevented from becoming entangled with the cutting blades 33 and the like.

Next, a holding plate 3 for drilling holes for vacuum pre-cooling
9 will be described. As shown in FIG. 12, a holding plate 39 is provided between the mounting position of the packaging sheet roll 37 on the packaging table 3 and the cutting mechanism 38 for cutting the packaging sheet 1, and the punching device 40 is operated from below. At this time, the sheet 1 is pressed by the pressing plate 39. The holding plate 39 is swingably attached to the hinge 41, and a magnet 42 is provided on the holding plate 39 and the packaging table 3 so that the holding plate 39 is fixed by the magnet 42 in the holding state. On the other hand, a contact portion 43A is formed in the drawer 43 for pulling out the cut packaging sheet 1 onto the opening 2a to contact the pressing plate 39 and forcibly return to the pressing state. With the above configuration, the packaging sheet roll 37
When pulling out the packaging sheet 1 from FIG.
As shown in FIG. 1A, when the holding plate 39 can be lifted and pulled out easily, and when the drawer 43 is moved to the vicinity of the cutting device 38, FIG.
As shown in FIGS. 3 (b) and (c), the contact portion 43A returns the pressing plate 39 to the pressing state.

[Alternative Embodiment] In the above embodiment, as shown in steps S5 to S8 in FIG.
_When all the light receivers 31b receive the detection light after the lapse of ₁ , the lowering operation of the support 3 is immediately stopped. However, in the case of the package A having the normal size, all the light receivers 31b are turned off. After receiving the detection light, the support base 3 may be stopped after a short time has passed. In this case, the vertical position of the support base 3 with respect to the holding member 14 and the auxiliary holding member 30 is changed by changing the above-mentioned minute time to a longer or shorter time, and the tightness of the packaging sheet 1 by the holding member 14 and the auxiliary holding member 30 is changed. Can be changed strongly.

In the above embodiment, as shown in FIGS. 7A and 7B, the upper portion 1a of the packaging sheet 1 sandwiched by the sandwiching members 14 is cut by the disk cutter 28, and the adhesive tape 4 is attached. Although it is configured, the upper portion 1a of the packaging sheet 1 sandwiched by the sandwiching members 14 is heated and melted by a heater (not shown), and the packaging sheet 1 is welded by this heating to hold the packaging sheet 1. May be configured.

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

[Brief description of the drawings]

FIG. 1 is a front view of the vicinity of a support table showing a state in which an article to be packaged is put into an opening of a packaging table and dropped on the support table.

FIG. 2 is a front view showing a state in which a pair of holding arms are closed from the state shown in FIG. 1 and the support is lowered to a position below a holding member;

FIG. 3 is a front view showing a state in which the upper portion of the packaging sheet is sandwiched by a pair of sandwiching members, and then the upper portion is cut and the support stand is lifted.

FIG. 4 is a perspective view showing a slide drive structure of a pair of holding members.

FIG. 5 is a plan view showing a slide and swing drive structure of a pair of holding members and an auxiliary holding member.

FIG. 6 is a perspective view showing the 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. 7 is a perspective view showing the flow of packaging from cutting of the upper part of the packaging sheet to pressing of the adhesive tape by the sponge member.

FIG. 8 is a perspective view showing the flow of packaging from the opening operation of the holding member to the release of the packaged object, and the state in which packaging is completed.

FIG. 9 is a plan view showing another embodiment of the cutter for cutting the upper portion of the packaging sheet.

FIG. 10 is a plan view showing another embodiment of the cutter for cutting the upper portion of the packaging sheet.

FIG. 11 is a plan view showing another embodiment of the cutter for cutting the upper part of the packaging sheet.

FIG. 12 is a perspective view showing a packaging table.

FIG. 13 is a longitudinal sectional side view showing a structure and an operation state of a holding plate for holding a packaging sheet when forming a vacuum pre-cooling hole.

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 middle stage of control of the entire packaging.

FIG. 16 is a diagram showing a flow of the latter half of control of the entire packaging.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 packaging sheet 1a narrowed-down portion of packaging sheet 2 packaging table 2a opening of packaging table 3 support table 9 elevating mechanism 14 clamping member 31 non-contact type displacement detecting means 32 clamping completion detecting means A

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-156414 (JP, A) JP-A-5-338610 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65B 11/00-11/58 B65B 49/00-49/16

Claims (2)

(57) [Claims] 1. An opening (2a) for charging an article to be packaged (A) is formed in a packaging table (2) on which a packaging sheet (1) for the article to be packaged (A) is placed. 2
A support (3) for receiving the packaged object (A) below a)
And an elevating mechanism (9) for elevating and lowering the support table (3). The packaged object (A) placed on the packaging sheet (1) is placed together with the support table (3) below the opening (2a). And a wrapping mechanism (11) for wrapping the packaged object (A) with the packaging sheet (1) when descending to the predetermined position, and a non-contact mechanism for detecting that the packaged object (A) has been lowered to the predetermined position. Type displacement detecting means (31), and a pair of holding members (14) and (14) for holding a narrowed portion (1a) of a packaging sheet (1) wrapping the packaged object (A). A control means for operating the pair of holding members (14) and (14) based on a detection result of the non-contact type displacement detection means (31) detecting that the package (A) has dropped to a predetermined position. The packaging device provided, wherein the pair of holding members (14 , (14) are provided with a clamping completion detecting means (32) for detecting that only the narrowed portion (1a) of the packaging sheet (1) has been clamped, and a clamping completion signal from the clamping completion detecting means (32) is received. For example, from the narrowed portion (1a) of the packaging sheet (1)
Also starts a cutting operation to cut off the upper side, and the pinch completion signal is output from the non-contact type displacement detecting means (3
If it does not occur within a predetermined time after the detection signal from 1),
After the pair of holding members (14) and (14) are once retracted to the standby position, the holding members (14) and (14) are closed while the support table (3) is lowered for a predetermined time.
And the pinch completion detecting means (32)
Control means to determine again whether there is a pinch completion signal
A packaging device that constitutes a stage . 2. An opening (2a) for charging an article to be packaged (A) is formed in a packaging table (2) on which a packaging sheet (1) for the article to be packaged (A) is placed. 2
A support (3) for receiving the packaged object (A) below a)
And an elevating mechanism (9) for elevating and lowering the support table (3). The packaged object (A) placed on the packaging sheet (1) is placed together with the support table (3) below the opening (2a). And a wrapping mechanism (11) for wrapping the packaged object (A) with the packaging sheet (1) when descending to the predetermined position, and a non-contact mechanism for detecting that the packaged object (A) has been lowered to the predetermined position. And a pair of holding members (14) and (14) for holding a narrowed portion (1a) of a packaging sheet (1) enclosing the packaged object (A). Control means for operating the pair of holding members (14), (14) is provided based on a detection result of the non-contact type displacement detection means (31) detecting that the object (A) has dropped to a predetermined position. Packaging device, wherein the pair of holding members (14) (14) is provided with a clamping completion detecting means (32) for detecting that only the narrowed portion (1a) of the packaging sheet (1) is clamped, and if there is a clamping completion signal from the clamping completion detecting means (32), A cutting operation for cutting off the upper side of the narrowed portion (1a) of the packaging sheet (1) and a sealing operation with the adhesive tape (4) after cutting are started, and the sandwiching completion signal is output from the non-contact displacement. Detection means (3
If it does not occur within a predetermined time after the detection signal from 1),
After the pair of holding members (14) and (14) are once retracted to the standby position, the holding members (14) and (14) are closed while the support table (3) is lowered for a predetermined time. And the holding member (14),
(14) The packaging device, wherein the control means is configured to slightly raise the support table (3) prior to the start of the cutting operation after the upper portion of the packaging sheet (1) is sandwiched.