JP3349534B2 - Film feeder in automatic packaging machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic packaging machine for packaging a predetermined number of boxes containing, for example, ampoules and chemicals and integrally packaging them with a film.

[0002]

2. Description of the Related Art As shown in FIG. 20, there is employed means for arranging a predetermined number, for example, five, of boxes 1 containing ampules and chemicals, for example, and packing them together with a film 2. As shown in the drawing, the plurality of boxes 1 are entirely wrapped with the film 2 and the ends 3 of the film 2 are overlapped and fused.
Thereafter, the package 2 shown in FIG. 21 is completed by overlapping and fusing the two side portions 4 of the film 2 together. A tear tape 6 for opening is attached to the surface of the packaged product 5, and a cut 7 is provided at the film end 3 to pull the tear tape 6 to facilitate opening. As means for performing the above-mentioned packaging, for example, Japanese Patent Publication No. 62-4193
No. 0 packaging equipment is known. According to this, the film unwound from the roll is hung from above the table, and a predetermined number of boxes aligned on the table are pushed out toward the film 2 by a pusher and are integrally packaged. Has become. There is a cutter above the table, and when the box is extruded with a pusher, this cutter operates to cut the film to a predetermined length, and the cut film is wrapped around the extruded box, and then Then, the ends of the film and both sides of the box are heat-sealed to complete the packaging process.

[0003]

However, in the conventional packaging machine, since the film is cut even when the box is not supplied on the table, the cut film enters the apparatus and the film is taken out by hand. Without it, the packaging machine could not be operated continuously. Further, there is also a problem that the pusher extends even though the box is not supplied, and pushes the film halfway, so that the film remains above the table in a slack state. For this reason, the operator has to put his hand into the apparatus to take out the cut film, and when the film sags, the film must be removed, which is dangerous and complicated. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a means for preventing the film from entering the apparatus and preventing the film from being pushed halfway by the pusher.

[0004]

Therefore, in an automatic wrapping machine for integrally packing a box supplied on a table as described above with a film while extruding the box with a pusher, the pusher is configured to be able to be shortened and the film is wrapped. When the box is not supplied on the table, the pusher is shortened, and the cutter is switched to a non-operable state.

[0005]

When a box is supplied on the table, the box on the table is pushed out toward the film with a pusher and is integrally packaged. On the other hand, when no box is supplied on the table, the pusher is shortened and the cutter is switched to a non-operable state. This prevents the film from being pushed by the pusher and from being cut by the cutter.

[0006]

1 is a perspective view of a packaging machine, FIG. 2 is a plan view, FIG.
Is a front view. Box 1 before packaging inside frame 10
There is a conveyor 11 for carrying in. An elevating table 12 which is moved up and down by a cam link mechanism (not shown) is provided at the end of the conveyor 11. The box 1 carried into the elevating table 12 by the operation of the conveyor 11 is detected by the box detection sensor 13.

A slide table 14 is provided in front of the elevating table 12. When a predetermined number of boxes 1 are carried in on the elevating table 12, the elevating table 12 is raised to the height of the slide table 14 by the cam link mechanism. A pusher 16 of an extruding device 15 is provided behind the elevating table 12. When the pusher 16 extends, a predetermined number of boxes 1 are extruded from above the elevating table 12 onto the slide table 14. The elevating table 12 is provided with a guide 17 for maintaining the arrangement of the boxes 1 during this movement so as not to be disturbed. The first one of the extruded predetermined number of boxes 1 is a slide table 14.
And is stopped by contact with the front plate 18.

A transport table 20 for sealing the film is provided on the right side of the slide table 14. The slide table 14 smoothly receives the box 1 on the next transport table 20 along the guide rod 21. Reciprocate to a position where you can pass. Also, slide table 1
A pusher 23 supported by a rodless cylinder 22 is provided on the left side of 4. Rodless cylinder 2
2 slides along the guide 24 and moves the pusher 23 to push the box 1 from the slide table 14 to the transport table 20.

As shown in FIG. 1, a roll 30 is disposed above the slide table 14 and the transport table 20, and the film 2 is pulled out from the roll 30 by a pulling means 31 to be transported to the slide table 14 and the transport table. The film 2 is supplied between the tables 20. FIG. 4 is a perspective view of the pulling means 31. Post 3
2, the pulling means main body 33 moves up and down. The pulling means main body 33 includes chuck plates 34 and 35 for holding the film 2 and a cutter 36 for cutting the film 2 below the chuck plates 34 and 35. A cam rod 37 is attached to the side surface of the column 32 so as to be swingable about its upper end, and the open / close cam followers 38 of the chuck plates 34 and 35 are in contact with the cam rod 37. A link rod 42 at the tip of a swing crank 41 pivotally supported by a shaft 40 is connected to a lower end of the cam rod 37. A cam follower 43 mounted on the back side of the swing crank 41 is engaged with a groove cam 46 of a cam wheel 45 mounted on a drive shaft 44. When the swinging crank 41 engaged with the cam follower 43 swings by the rotation of the cam wheel 45 and the cam rod 37 swings via the link rod 42, the cutter 36
Is to be cut.

A chuck 50 for temporarily locking the leading end of the film 2 is provided below the pulling means 31 as shown in FIG. 51,
Reference numeral 52 denotes left and right chuck claws.
1 and 52, the front end of the film 2 is temporarily locked. In addition, a cutter 53 for forming an opening cut 7 (see FIG. 20) on the surface of the packaged product 5 is provided beside the chuck claws 51 and 52. In addition, as shown in FIG. 1, a press-contact plate 55 for bending the ends of the film 2 along the rear surface of the box 1 is provided above the front of the transport table 20.
A sealer 56 for heat-sealing the ends of the film 2 bent by the press-contact plate 55 is provided behind the sealer 56.

In the packaging machine configured as described above,
The boxes 1 before packing are carried in one by one on a conveyor 11 and supplied to a lifting table 12. When the boxes 1 are successively placed on the raising table 12, the box 1 placed later pushes out the box 1 placed earlier, and when a predetermined number of the boxes 1 are placed on the lifting table 12, the top of the box 1 is placed. Since the box 1 is pushed and comes to the position of the box detection sensor 13, the box detection sensor 13
The lifting table 12 on which a predetermined number of boxes 1 are placed rises to the height of the lifting table 14. Next, the extruder 15 is operated, the pusher 16 is extended by the pusher 16, and extrudes the box 1 from above the elevating table 12 onto the slide table 14. At this time, the box 1 is made up of the guide 17 and the front plate 1.
8, and a predetermined number of boxes 1 are aligned and supplied onto the slide table 14. While the boxes 1 are aligned as described above, the film 2 is held between the chuck plates 34 and 35 in the pulling means main body 33 at the position where the pulling means 31 is raised,
Thereafter, the pulling means main body 33 descends along the column 32 to supply the film 2 between the slide table 14 and the transport table 20.

Here, FIG. 6 shows a state in which the pulling means main body 33 is lifted and the lower end of the film 2 is clamped.
After holding the lower end of the film 2 in this manner, the pulling means main body 33 descends between the slide table 14 and the transport table 20 as shown in FIG. Then, the lower end of the film 2 is locked between the chuck claws 51 and 52 of the chuck 50 as shown in FIG. Thereafter, as shown in FIG. 9, only the pulling means main body 33 rises. Further, the slide table 14 moves to the vicinity of the transfer table 20 along the guide rod 21. When the pulling means main body 33 rises to a predetermined height, the cam wheel 45 described above with reference to FIG.
The film 2 is cut by the cutter 36 as shown in FIG.
In this way, the film 2 cut to a predetermined length is supplied between the slide table 14 and the transport table 20, and at the same time, the rodless cylinder 22 operates to push out the pusher 23 as shown in FIG. Is pushed out onto the transport table 20. As a result, the film 2 is integrally wound around the plurality of boxes 1. When the pusher 23 extrudes the box 1 in this manner, the film 2
Is pulled out from the chuck 50.

Then, after the film 2 is integrally wound around the plurality of boxes 1 as described above, the film 2 is appropriately heat-sealed while being conveyed by the conveyance table 20, and the packaging described in FIG. The product 5 is completed.
However, in the packaging machine as described above, the rodless cylinder 22 operates and the pusher 23 advances as shown in FIG. 13 in a state where the box is not supplied on the slide table 14 as shown in FIG. Then, the film 2 is pushed halfway, and the lower end is the chuck 50.
However, there is a problem that the film 2 that has come off from the slack and remains loose above the table. Also, although there is no need for packaging, the film 36 is
14, the cut film 2 entered the lower side of the transport table 20 as shown in FIG. 14, and the packaging machine could not be operated continuously unless it was manually removed. Therefore, the present invention provides a pusher 2
3 is configured to be able to be shortened and switched to a state where the cutter 36 is not operated. When the box 1 is not supplied to the slide table 14, the pusher 23 is shortened and the cutter 36 is switched to a state where the cutter 36 is not operated. It is intended to solve the above problems.

In the following, an embodiment of the present invention will be described. As shown in FIG. 15, a pusher 23 is attached to a piston rod 61 of a cylinder 60, and the cylinder 60 is fixed to a moving member 62 extending from the rodless cylinder 22. Then, by the expansion and contraction operation of the cylinder 60, the pusher 23 is protruded as shown in FIG. 15 and the pusher 23 is shortened as shown in FIG. Tube 63 in the rear chamber of cylinder 60
When the air is supplied from, the piston rod 61 extends and the pusher 23 projects, and when the air is supplied from the tube 64 to the front chamber, the pusher 23 is shortened. Also, as shown in FIG.
The front and rear positions of the pusher 23 can be adjusted by changing the fixing position of the pusher 23 with the screw 65. As shown in FIG. 18, one end of a swing plate 71 pivotally supported by a shaft 70 is attached to the lower end of a cam rod 37 for operating the cutter 36 of the pulling means 31, and a cylinder 72 is attached to the other end of the swing plate 71. Piston rod 73
It is configured to be attached. When the swing plate 71 is pulled by the cylinder 72, the cam rod 37 swings and pushes the cam follower 39, and the film 2 is cut by the cutter 36. Tubes 74 and 75 are connected to the rear chamber and the front chamber of the cylinder 72, respectively.

Then, the above-described packaging machine processes the steps in the order shown in FIG. Elevating table 1
When a predetermined number of boxes 1 are placed on 2 and the box detection sensor 13 detects the first box 1, time adjustment is performed via a timing cam, and when cutting the film, the air cylinder 72 contracts and the cutter 36 is cut. The film 2 is cut with. Further, since the pusher of the air pusher is extended, the pusher 23 pushes out the film, and the packaging is performed. On the other hand, if the box 1 or the predetermined box 1 is not placed on the elevating table 12 and the box detection sensor 13 does not detect the box 1, time adjustment is performed via the timing cam, and the film is originally removed. Since the air cylinder 72 does not contract when cutting, the cutter 36
Does not work and does not cut the film. Further, since the pusher of the air pusher is in a contracted state, the pusher 23 does not push the film halfway. That is, when the box 1 is supplied to the slide table 14, the cylinder 60 expands and contracts to push the pusher 23, and the rodless cylinder 22 operates to push the pusher 23 as usual.
Is pushed out onto the transport table 20. When the box 1 is pushed out, the cylinder 72 is shortened and the swing plate 71 is pulled, and the cam rod 37 swings to cut the film 2 with the cutter 36. As described above, the box 1 is integrally packaged while being extruded into the film 2. Thereafter, heat transfer and the like are performed as appropriate while being carried on the carrying table 20, and FIG.
The package 5 described in 1 is completed. On the other hand, when the box 1 is not supplied to the slide table 14, the cylinder 60 is shortened and the pusher 23 is retracted as shown in FIG. Do not extrude. Also,
The operation of the cutter 36 is stopped without shortening the cylinder 72 so that the film 2 is not cut. Thus, according to the above means, the box 1
Is not supplied, there is no fear that the pusher 23 pushes the film 2 halfway.
Is not cut by the cutter 36, so that there is no problem that the lower end of the film 2 is detached from the chuck 50 and the sagged film 2 remains above the table, and the unnecessary cut film 2 is removed. There is no need to worry about getting into the apparatus below the transfer table 20. Note that whether or not the box 1 is supplied to the slide table 14 may be detected by using the box detection sensor 13, but whether a predetermined number of the boxes 1 are present on the slide table 14. A sensor for determining whether or not the determination may be provided.

[0016]

According to the supply device of the present invention, when the box is not supplied on the table, the pusher is shortened,
Since the state is switched to a state where the cutter is not operated, the film is not pushed halfway by the pusher, and the film is not cut, so that there is no fear that the film enters the apparatus. Therefore, there is no need to insert a hand into the apparatus to take out the film, and the operation is safe and the operation efficiency is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a packaging machine.

FIG. 2 is a plan view of a packaging machine.

FIG. 3 is a front view of the packaging machine.

FIG. 4 is a perspective view of a pulling means.

FIG. 5 is a perspective view of a chuck.

FIG. 6 is an explanatory view showing a state in which the pulling means main body is raised to clamp the lower end of the film.

FIG. 7 is an explanatory view of a state where the pulling means main body is lowered.

FIG. 8 is an explanatory view of a state in which the lower end of the film is locked to a chuck.

FIG. 9 is an explanatory view of a state in which the pulling means main body is raised.

FIG. 10 is an explanatory view of a state in which a film is cut by a cutter.

FIG. 11 is an explanatory view of a state in which a box is pushed out of a slide table to a transfer table.

FIG. 12 is an explanatory view showing a state in which the box is not sufficiently supplied on the slide table.

FIG. 13 is an explanatory view showing a state where the pusher pushes the film halfway.

FIG. 14 is an explanatory view of a state in which a film has entered the lower side of the transport table.

FIG. 15 is a perspective view of the pusher in a protruding state.

FIG. 16 is a perspective view of the pusher in a shortened state.

FIG. 17 is an enlarged view of a cylinder mounting portion of the pusher.

FIG. 18 is a perspective view of a pulling means configured to operate a cutter by a cylinder.

FIG. 19 is a flowchart of an embodiment.

FIG. 20 is a perspective view showing a state in which the box is packaged with a film.

FIG. 21 is a perspective view of a packaged product.

[Explanation of symbols]

 1 Box 2 Film 14 Slide table 23 Pusher 36 Cutter

Claims (1)

(57) [Claims] 1. An automatic packaging machine for integrally packing a film supplied on a table with a film while extruding the box with a pusher, wherein the pusher is configured to be able to be shortened and switched to a state in which a film cutter is not operated. A film supply device in an automatic packaging machine configured to shorten the pusher and switch to a state in which the cutter is not operated when the box is not supplied on the table;