JPH055123Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to wrapping objects to be packaged, particularly foodstuffs and other products in trays or other containers, using stretchable plastic films such as polyvinylidene chloride. This article relates to a packaging machine that uses Tsuchifilm for packaging.

[Prior Art] In general, a packaging machine presses the packaged product against the stretch film by pushing the packaged product supplied to the pedestal toward the stretch film supplied to the packaging section and stretched. It is known to wrap a stretch film by folding it under a packaged object using a folding body while holding the film in a tensioned state, and then transporting the packaged object. As a packaged article supply device for supplying the packaged articles onto the pedestal, a plurality of pairs of left and right protruding members are provided at mutually corresponding positions of the left and right pair of endless belts, and the packaged articles are transferred in a protruding manner. It is known that the material is transported on a guide plate while being engaged with a member and supplied to the packaging section of the packaging machine.

However, in the above-mentioned packaged article supply device, when a large number of packaged articles are successively carried onto the guide plate of the previous packaged article supply device by the carry-in conveyor, the protruding transfer of the packaged article supply device There has been a problem in that a large number of items to be packaged are stuck against each other in the member, resulting in a clogging condition, which impedes the supply of the items to be packaged.

Therefore, in order to feed the items to be packaged one by one without clogging, it is possible to use the article conveyance device proposed in Japanese Utility Model Application Publication No. 59-71216. a retractable stopper provided at a distance approximately equal to the length of the article from the starting end of the second conveyor;
a sensor for detecting the passage of an article on the conveyor, the stopper stops one article sent from the first conveyor on the second conveyor, and the sensor detects the article and moves it to the first conveyor.
stop the conveyor, and after a predetermined time elapses, sink the stopper and transfer the one article to the terminal side,
The passage of this article is detected by the sensor and the first
At the same time, the stopper is raised again to stop the next article at the starting position on the second conveyor, and the stopper that retracts in this way places the next article on the second conveyor. The system stops for a certain period of time and transports the items one after another at regular intervals.

[Problems to be solved by the invention] In the above conventional article conveying device, the next article is stopped by the stopper for a predetermined period of time, so the article sent from the first conveyor hits the stopper, Particularly when this type of item is used for carrying in packaged items, when the packaged item hits the stopper, the items stored in the tray may become misaligned, or the tray may become deformed. There is a risk of interfering with later wrapping using the stretch film, and also because the second conveyor continues to be driven even when the object to be wrapped hits the stopper and stops moving. The objects to be packaged were pressed against the stoppers by the second conveyor, and there was a risk that unreasonable force would be applied to the trays, causing them to deform.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a packaging machine that can accurately carry the items to be packaged one by one into the packaging section of a packaging item supply device and can efficiently supply the items to be packaged.

[Means for Solving the Problems] The present invention includes a film supply device that supplies a stretch film to a packaging section position, and a packaged article supply device that includes a supply conveyor that supplies the packaged articles to the packaging section position. , which has a first and second carry-in conveyor and a sensor, and the sensor detects that one packaged article is sent onto the second carry-in conveyor from the first carry-in conveyor which carries in a plurality of packaged articles. A carry-in device configured to stop a first carry-in conveyor based on the detection signal at the time of detection, and carry the one object to be packaged into the packaged object supply device by the second carry-in conveyor. Then, when it is detected that the one packaged item has been carried into the packaged item supply device by turning on a switch provided in the packaged item supply device, the second packaged item is turned on based on the detection signal. The conveyor is stopped and the supply conveyor is started, and when it is detected by the OFF operation of the switch that the one packaged object is transferred by the supply conveyor, the switch is activated based on the detection signal. a control means for starting the first and second carry-in conveyors, a film wrapping device for wrapping the packaged articles supplied to the wrapping section position with a stretch film, and a carry-out unit for carrying out the packaged articles covered with the film. This is a packaging machine equipped with a device.

[Operation] When the first packaged item among the plurality of packaged items transferred by the first carrying-in conveyor is transferred onto the second carrying-in conveyor, the sensor detects this and the first Stop the loading conveyor and move the first one
The items to be packaged are transferred as they are to the top of the supply conveyor by the second conveyor, and a switch is turned on.The second carry-in conveyor is stopped and the supply conveyor is started at the same time as the switch is turned on. When the one packaged item is transferred to the packaging section position by the conveyor and the one packaged item leaves the switch by starting the supply conveyor, the switch is turned off, and the switch is turned off. The first and second conveyors are restarted by the operation, and when the sensor detects the first packaged item among the plurality of items on the first carrying-in conveyor, the first carrying-in conveyor is restarted. At the same time, the one packaged item is transferred to the switch position by the second carry-in conveyor, and by repeating this process, the first packaged item among the plurality of packaged items on the first carry-in conveyor is transferred to the switch position. are sequentially transferred one by one to the packaging section position.

[Example] Figures 1 and 2 show an overview of the overall configuration of the packaging machine.
A packaged article supply device A is provided with a supply conveyor (hereinafter referred to as conveyor) 4 for transporting the packaged articles 3 to the lower part of the packaging section 2, which is approximately the middle portion of the packaging section 2.

At the supply end of the conveyor 4, there is provided a pedestal 5 on which the objects 3 to be packaged are fed and placed by the conveyor 4, and this pedestal 5 is connected to a lift 6 which is moved up and down by a drive section as appropriate; In addition, a pedestal lifting device B is formed which stretches and holds the stretch film 7 when the pedestal 5 is raised.

A roll body 8 in which a stretch film 7 is wound in a roll shape is rotatably held on the rear side of the main body frame 1. The film 7 is sandwiched between a pair of upper and lower endless belts 9, and the film 7 is transferred to the packaging section 2.
A film feeding device C for transporting the film to the main body frame 1 is disposed on both sides of the upper part of the main body frame 1 in the front-rear direction. At the end of the endless belt 9 on the side where the stretch film 7 is inserted, there is a cutter 10 for making perforations in the width direction of the stretch film 7, and a film presser 11 provided on both sides of the cutter 10.
A film cutting device D is provided.

On the packaging section 2 side of the main body frame 1, there are a rear folding body 12 and a left and right folding body 13 that reciprocate back and forth along the bottom surface of the packaged object 3 pushed up by the pedestal lifting device B to separate it from the perforation. A film folding device E, which is a film wrapping device, is provided.

On the upper side of the main body frame 1, there is a carrying body 14 and a packaging body 3 that move forward while contacting the upper surface of the packaging body 3a.
A carrying-out device F is provided, which includes a transfer body 15 for placing and transferring a.

Next, to explain the packaging order with reference to FIG. 10, as shown in FIGS. 10A and 10B, the conveyor 4 of the packaged object supplying device A, such as a tray containing a product, wraps approximately the middle part from the front side of the main body frame 1. It is transferred to the lower part of the section 2 and is supplied and placed on the pedestal 5. The stretch film 7 is pulled out from the roll body 8 by the film supply device C at the same time as the object to be packaged 3 is transferred.
The film is transferred from the rear side of the main body frame 1 toward the packaging section 2 while being sandwiched between a pair of upper and lower endless belts 9, and during the transfer, perforations 16 are formed by the cutter 10 of the film cutting device D. The series of stretch films 7 on which perforations 16 have been formed are further transferred to the packaging section 2.
be transported to.

In this manner, as shown in FIGS. 10C and 10D, the article to be packaged 3 is supplied onto the pedestal 5, and a series of stretch films 7 with perforations 16 are supplied to the packaging section 2. As shown in FIGS. 10E and F, the pedestal 5 is raised by the lift 6 of the pedestal lifting device B, and the stretch film 7 supplied to the packaging section 2 is pushed up from below and stretched, and at the same time the rear folding body 12
The packaged object 3 with the left and right folding bodies 13 pushed up
The stretch film 7 is slid along the bottom surface and separated from the perforation 16, and the edges of the stretch film 7 are folded in to form a package 3a, and as shown in FIGS. 14 and the transport body 15 to carry it out to the front side of the main body frame 1. Such a packaging machine is, for example, the one proposed by the applicant of the present application,
It is disclosed in Publication No. 61-164913.

More specifically, in the packaging material supply device A, a tray 18 on which foodstuffs and other products 17 are placed
The packaged object 3 is transferred from the front side of the main body frame 1 toward the middle side of the main body frame 1, and while the tray 18 is placed on the guide plate 19, the L-shaped projecting plate serving as the transfer member is transferred. 20 and pushed out onto the pedestal 5. The projecting plate 20 is attached to a pair of endless chains 4a of a conveyor 4 connected by a chain 22 to a motor 21 with a brake that moves at a preset speed so as to supply the objects 3 to be packaged. The projecting plate 20 moves along the guide groove 24 formed in the guide plate 19. A tray 18 is attached to the guide plate 19.
The switch 25 and the tray 18 that detect the supply of
Switch 2 for transferring onto the pedestal 5 in steps
When the tray 18 is not supplied, the tray 18 is stopped, and when the tray 18 is supplied, it is transferred to the pedestal 5 in two steps.

In the packaging machine equipped with such a packaged object supply device A, a carry-in device G is provided to accurately carry the packaged objects 3 one by one into the packaged object supply device A. As shown in FIGS. 1 to 8, in this carry-in device G, a long first carry-in conveyor 26 is disposed in the same direction as the conveyor 4 of the packaged article supply device A, and this conveyor 4 and the first A second carry-in conveyor 27, which is short enough to place two items 3 to be packaged, is disposed between the carry-in conveyor 26 and the second carry-in conveyor 27. The carry-in terminal end of the second carry-in conveyor 27 extends to the vicinity of the switch 25 of the packaged article supply device A, and the second carry-in conveyor 27
A light emitting section 28A and a light receiving section 28B, which constitute a photoelectric switch 28, which is a sensor for detecting the object to be packaged 3, are opposed to each other at the upper part of the carry-in start end side of the package 7.
Further, the ends of the first and second carry-in conveyors 26 and 27 and the ends of the second carry-in conveyor 27 and the conveyor 4 overlap each other. Then, when one of the plurality of packaged objects 3 transferred by the first carrying-in conveyor 26 is transferred onto the second carrying-in conveyor 27, the packaged object 3 receives light from the light emitting section 28A. The light beam directed toward the portion 28B is blocked, and a detection signal of the packaged object 3 is output from the sensor. As a result, the first carry-in conveyor 26 is stopped, and one packaged article 3 is transferred onto the conveyor 4 by the second carry-in conveyor 27, and the switch 25 is turned on by the packaged article 3. This switch 2
5, the second carry-in conveyor 27 stops and the conveyor 4 starts, and the operation of the conveyor 4 transfers the packaged items 3 onto the guide plate 19 via the projecting plate 20, and the packaged items 3 are transferred from the switch 25. When the switch 25 is turned off by moving away, the first and second
The carry-in conveyors 26 and 27 are started. It is electrically connected to a control circuit (not shown) as a control means so as to repeat the series of operations described above. The first carry-in conveyor 26 is configured such that a pair of left and right endless seat belts 29 are operated by a motor 30, and the second carry-in conveyor 27 is configured such that a pair of left and right endless seat belts 29 are operated by a motor 30.
The endless seat belt 31 is configured to be operated by a motor 32. in this case,
The second carry-in conveyor 27 has an arm 34 protruding from a frame 33 in the feeding direction, and a tapered surface 35 at the tip of the arm 34 to form a sharpened portion 36.
A small-diameter feed roller 37 is pivotally attached to the lower part of the tapered surface 35, and the belt 31 passes through the sharpened portion 36 between the large-diameter feed roller 38 on the carry-in start end side and the small-diameter feed roller 37. He is being carried across the bridge in a nervous state. 39 is a tension roller. 40 is a tensioning device for the belt 29 of the first carry-in conveyor 26;
2 is slidably provided in the frame 33 through an elongated hole 43 and a screw 44, and when the screw 44 is loosened, the shaft support member 42 is inserted through the elongated hole 43 into the screw 45.
It is configured so that it can move in the belt tensioning direction. Reference numerals 46 and 47 denote a pair of left and right guide rails located on both sides of the first and second carrying-in conveyors 26 and 27 and provided on the upper surface of the frame 33. The terminal end side is movably placed on the upper surface of the frame 33 via pins 48, 48, and a rail width adjustment mechanism 49 is provided on the guide rails 46, 47 at the loading start end side of the first loading conveyor 26.
This rail width adjustment mechanism 49 has a rack 50 fixed to one guide rail 46 in a direction perpendicular to this guide rail 46 and a rack 51 fixed to the other guide rail 47 facing in parallel, so that both guide rails One pinion 5 in the center between rails 46 and 47
2 are pivotally supported in a meshed state. For example, when the guide rail 46 is moved in the width direction, the rack 50 is moved in the width direction integrally with the rail 46, and the rotation of the pinion 52 causes the rack 50 to move in the width direction.
is fed in the opposite direction with the same feed amount as the rack 50, and the other guide rail 47 moves integrally with the rack 51. As a result, simply by moving one guide rail 46 or 47, the other rail is automatically fed by the same feed amount, eliminating the need for complicated rail width adjustment. Note that the pinion 52 is provided with a set screw 54 having a handle 53, and when the set screw 54 is tightened, the pinion 52
rotation is prevented.

Then, as shown in FIG. 9A, the first carry-in conveyor 26 is started by the operation of the motor 30, and the second carry-in conveyor 27 is started by the operation of the motor 32, so that a large number of articles 3 are transferred to each other. They are transported on the first carry-in conveyor 26 along guide rails 46, 47 in a densely arranged state. In this case, for example, the items 3 to be packaged are transferred manually to the first conveyor 26.
supplied to Next, when the first packaged item 3 is sent from the first carry-in conveyor 26 to the second carry-in conveyor 27, as shown in FIG. 9B, the second carry-in conveyor 2
A light emitting unit 28A in which the packaged object 3 on 7 is a sensor,
It is detected by the light receiving section 28B and the first carry-in conveyor 26 stops. At this time, the second loading conveyor 2
7 continues to operate, one packaged item 3 is further transferred to the conveyor 4 of the packaged item supply device A.
sent to the top. In this case, the packaged object 3 is
When the switch 25 is turned on, the first and second conveyors 26 and 27 are brought to a halt, and the conveyor 4 is activated. As a result, as shown in FIG. 9D, the packaged object 3 is sent onto the guide plate 19 by the projecting plate 20, which is a transfer member, and the switch 25 is turned off. By turning off the switch 25, the first and second carry-in conveyors 26 and 27 are operated, and the above-described series of operations is repeated.

In this way, in the above embodiment, one item 3 to be packaged is separated from a large number of items 3 on the first delivery conveyor 26 by the second delivery conveyor 27 and is sequentially wrapped. Since the packaged articles 3 are supplied to the packaged article supplying device A, the problem of a large number of packaged articles 3 being brought into the packaged article supplying device A in a state that they are in contact with each other and stuck to the projecting plate 20, resulting in a clogging condition is eliminated. . Moreover, when the first packaged item 3 among the plurality of packaged items 3 is transferred from the first carry-in conveyor 26 to the second carry-in conveyor 27, the second and subsequent packaged articles 3 are stopped. The first loading conveyor 26
One packaged item 3 is separated from the plurality of packaged items 3 and transferred, and the first packaged item 3 is transferred to the switch 25 on the conveyor 4 side.
When turned on, the second carry-in conveyor 27 stops, the conveyor 4 starts, and one packaged object 3 is transferred from the second carry-in conveyor 27 to the conveyor 4.
When one packaged item 3 is separated from a plurality of packaged items 3, the packaged item 3 is transferred.
There is no need to use a stopper etc. to stop the package, and there is no problem such as the packaged article 3 hitting this stopper etc. and deforming the packaged article 3 or causing misalignment of the stored article. , the subsequent packaging work can be done well. Further, since the second carry-in conveyor 27 is formed such that its carry-in terminal end is located near the switch 25 of the conveyor 4 via the sharp end 36 of the arm 34, the second carry-in conveyor 27 is connected to the conveyor 4 through the sharp end 36 of the arm 34. The package 3 can be transferred smoothly. Also, guide rails 46, 47
Since the rail width adjustment mechanism 49 consisting of racks 50, 51 and pinion 52 is configured so that the amount of movement from the center line is the same, it is easy to adjust the rail width according to the width dimension of the packaged object 3. It is.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the sensor is not limited to a photoelectric switch, and any suitable switch such as a limit switch may be selected. In addition, the overall configuration of the packaging machine is
It goes without saying that the present invention can be applied to various types, such as the one disclosed in Japanese Patent No. 89591, which does not use push-up of the pedestal.

[Effects of the invention] The present invention includes a film supply device for supplying a stretch film to a packaging section position, a supply conveyor for supplying a packaged article to the packaging section position, and a first and second package supply device. At the time when the sensor detects that one packaged item has been sent from the first carrying-in conveyor that carries in a plurality of packaged items onto the second carrying-in conveyor. a carrying-in device configured to stop a first carrying-in conveyor based on the detection signal and carrying the one article to be packaged into the packaged article supplying device by the second carrying-in conveyor; When it is detected that the one object to be packaged has been carried into the object supply device by turning on a switch provided in the object supply device, the second conveyor is stopped based on the detection signal. When the supply conveyor is started and it is detected by the off operation of the switch that the one packaged object is transferred by the supply conveyor, the first and second comprising a control means for starting a carry-in conveyor, a film wrapping device for wrapping an object to be packaged supplied to the packaging unit position with a stretch film, and a carrying-out device for carrying out the object to be packaged covered with the film, The objects to be packaged are transferred one by one from the first carry-in conveyor to the supply conveyor via the second carry-in conveyor whose start and stop are controlled by a sensor switch. When separating the packaged items,
There is no need to use a stopper, etc. to stop the packaged items, the problem of the packaged items hitting the stopper, etc. is eliminated, and the items to be packaged are accurately delivered one by one to the packaged item supply device, and the packaging unit It is possible to provide a packaging machine that can efficiently supply items to be packaged to a certain position.

[Brief explanation of the drawing]

Figures 1 to 11 show an embodiment of the present invention, with Figure 1 being a longitudinal sectional view of the entire packaging machine, Figure 2 being a plan view thereof, and Figures 3 and 4 being perspective views of the loading device. , Fig. 5 is the same plan view, Fig. 6 is the same sectional view, and Fig. 7 is the same plan view.
The figure is a plan view of the rail width adjustment mechanism, Figure 8 is a sectional view of the same, Figure 9 A, B, C, D is a schematic explanatory diagram showing the loading state, Figure 10 is A, B, C, D, E, F,G,
H is a schematic explanatory diagram showing the packaging state, and FIG. 11 is a time chart. 2... Packaging department, 3... Item to be packaged, 4... Supply conveyor, 7... Stretch film, 25... Switch, 26... First carry-in conveyor, 27...
2nd carry-in conveyor, 28... sensor, A... packaged object supply device, B... pedestal elevating device, C... film supply device, E... film folding device, F...
...Carry-out device, G...Carry-in device.

Claims (1)

[Scope of utility model registration request] A film supply device that supplies a stretch film to a packaging section position, a packaged article supply device that includes a supply conveyor that supplies a packaged article to the packaging section position, and first and second carry-in conveyors and a sensor. When the sensor detects that one packaged item has been transferred from the first carrying-in conveyor that carries a plurality of packaged items onto the second carrying-in conveyor, the first a carry-in device configured to stop the carry-in conveyor and carry the one article to be packaged into the packaged article supply device by the second carry-in conveyor; and a switch provided on the packaged article supply device. When it is detected that the one packaged item has been carried into the packaged item supply device by the ON operation, the second conveyor is stopped and the supply conveyor is started based on the detection signal, and control means for starting the first and second carry-in conveyors based on a detection signal when it is detected by the off-operation of the switch that the one packaged item is transferred by the supply conveyor; A packaging machine comprising: a film wrapping device that wraps the packaged item supplied to the packaging section position with a stretch film; and a carry-out device that carries out the packaged item covered with the film.