JPH07315309A - Packing device - Google Patents

Abstract

PURPOSE:To pack articles with different widths by a packing device, by arranging alternately different kinds of support square troughs supporting articles with different widths, on a chain conveyor and stopping the chain conveyor at appropriate positions in accordance with the selection of respective support square troughs. CONSTITUTION:One of packing material belts F is inserted in a transfer roller 11 from the upstream side and a forked guide 12 is inserted in the opened edge and the front end thereof is suspended down below the frame of a heat- sealer 16. In this time, the number of sheet of articles C to be packed by a packing material B is preset and a plurality of support square troughs 22a, 225 are selected in accordance with the number of sheets. That is, respective support square troughs 22a, 22b are arranged alternately on the chain conveyor 20 transporting the articles C. When the number of sheets of articles C is large for instance, a wide support square trough 22a is used. And after that, a changeover switch is manipulated in accordance with respective support square troughs 22a, 22b and the halt point of the chain conveyor 20 is positioned to coincide with the opened edge of the packing material F.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging position in which several strip-shaped or plate-shaped articles to be packaged are sequentially wrapped by a wrapping band to form individual packages. Depending on the number, the present invention relates to a packaging device that varies between a small number and a large number.

[0002]

2. Description of the Related Art Conventionally, a conveyor for supplying an object to be packaged in this type of packaging apparatus supplies the object to be packaged to a packaging material strip, but the packaging material strip is conveyed in the vertical direction and is elongated in the vertical direction. The object to be packaged is inserted from the open edge of the belt, and therefore the object to be packaged is successively conveyed by the conveyor in a state where the flat surface of the object is to be erected. A square gutter-shaped guide is provided, and several pieces are arranged in a single square gutter guide so that the surface of the packaged object is in the vertical direction.
Items to be packaged are supported and transported. However, the width of the guide that can support a small number of sheets can support only the number corresponding to that number, and if the width of the guide is wide, all the packaged items will be aligned almost vertically when there are many packaged items. , From the open edge of the packaging material band, it can be pushed into it, but when a small number of articles to be packaged are supplied to this wide guide, the articles to be packaged do not incline upright or incline, The situation that it cannot be inserted into the packaging material band occurs.
Therefore, a flexible plate-like object such as a folded garbage bag or a disposable diaper is used as the object to be packaged, for example, 5
When packaging one by one, and when packaging ten or fifteen, two packaging machines are provided, one is equipped with a conveyor of a different size, and the other is used separately, or only the conveyor system is guttered. It is used by exchanging the guides with different widths.

[0003]

However, as described above, it is preferable to properly use the packaging device and the conveyor device each time the number of items to be packaged is different, but it is preferable when there are a lot of lots, but in the work of one day. When the number of lots is small, it is uneconomical to prepare two devices. Therefore, with a single packaging device, both a small number and a large number of items to be packaged are accurately supported by a simple switching operation,
An object of the present invention is to provide to the market a packaging device equipped with a conveyor that surely stops at the insertion position into the packaging material.

[0004]

In order to achieve the above object, the present invention provides a transfer roller for intermittently transferring a half-folded packaging material strip, and opening the packaging material strip downstream of the transfer roller. A heat sealer including a guide for separating the two films at the edges from each other, and a pair of jaws that are in contact with each other on both sides of the packaging material band and are separated from each other on the downstream side of the guide each time the transfer roller is stopped. A chain conveyor that conveys a plate-shaped object to be packaged is provided on the open edge side of the packaging material band at a position slightly upstream from the heat sealer, and the object to be packaged on the chain conveyor is packaged as described above. In a packaging device comprising a pushing device for pushing into the packaging material band from the open edge of the material band, the chain conveyor supports transversely for supporting objects to be packaged of at least two widths. Gutter is, Yes sequentially repeatedly arranged,
One of the sprocket gear shafts of the chain conveyor
The rotation corresponds to one cycle of the wide / narrow support gutter of the gutter by the same number or an integral multiple, and the sprocket gear shaft is provided with a rotating member having a detection point corresponding to the cycle. At least two sensors for detecting the above-mentioned detection points are provided in the machine frame near the member, and each of these sensors has a corresponding support corner gutter on the chain conveyor, which corresponds to the packaging material band position. It is provided according to the phase when matching, the control device is provided with a changeover switch for selectively selecting the sensor, the conveyor is stopped for each detection signal of the selected sensor, The packaging device is characterized in that a return completion signal of the device for pushing the object to be packaged is a conveyor restart signal.

In order to achieve the above object, it is preferable that each of the supporting gutters of the packaging apparatus is of two types and the number of the detection sensors is two.

In order to achieve the above object, a sensor for detecting the presence of an article to be packaged on an incoming support corner trough is provided at the conveyor position where the article to be packaged is inserted into the packaging material strip of this packaging apparatus. It is preferable that the AND signal between the output of the detection sensor and the detection signal of the selected detection point detection sensor is a conveyor stop signal.

[0007]

According to the specific invention of claim 1, first, the packaging material strip made of a semi-folded thermoplastic synthetic resin film is passed through a pair of holding type transport rollers, and the packaging material strip is provided on the downstream side of the transport rollers. It hangs vertically, and the guide is inserted from the open edge, and it is half-folded and formed.
Spread a sheet of film at an interval sufficient to allow the unwrapped product to be inserted, and hang a band of wrapping material between a pair of heat sealer jaws. On the other hand, for the plate-shaped packaged object, the electric circuit of the other sensor is opened when the electric circuit of the detection point detection sensor side that detects the position of the supporting gutter position is wide or narrow depending on the number of packages in the lot. . Then, among the supporting gutters on the belt conveyor, only the supporting gutters of the selected width are supplied with a plurality of articles to be packaged, and the packaging device is operated.

When the wrapping device is operated, the transfer material roller intermittently conveys the wrapping material strip by one bag, and at each stop, the heat sealer approaches each other, and the wrapping material strip is welded or welded in the transverse direction. To do. The opening edge is also welded or welded if necessary. By doing so, the portion that is melted in the transverse direction is located slightly lower than the height of the bottom of the supporting corner gutter mounted on the conveyor. When the conveyor moves and the detection point of the operating plate that rotates integrally with the sprocket gear shaft arrives at the selected sensor position, the support gutter corresponding to the detection point detection sensor just selected is attached to the packaging material strip. Consistent with the open edge position, the conveyor stops.

Next, the pressing member of the pushing device operates,
The object to be packaged in the supporting corner gutter is from the open edge of the packaging material strip,
It is inserted into this and placed on the transversely welded portion formed on the packaging material strip. The pressing member of the pushing device returns to the position outside the supporting corner gutter, and the conveyor operates in the next conveying section. In the meantime, the heat sealers approach and separate from each other to weld or melt the packaging material strip, and the transport roller conveys one packaging material strip. The above operation is repeated.

When the number of articles to be packaged corresponds to the width of the other support gutter, the articles to be packaged are sequentially supplied to the other support gutters, and the detection point detection sensor corresponds to this support gutter. The circuit on the detection point detection sensor side is closed, the circuits on the other detection point detection sensors side are opened, and the same operation is performed. In this way, the newly selected support corner gutter stops at the opening edge position of the packaging material strip.

According to the second aspect of the present invention, there are two types of the supporting corner gutters, and two types of wide and narrow types are provided on the alternating conveyor. Therefore, the two sensors, which are the above-mentioned number of sensors, can be switched to each other. The operation is basically the same as that of claim 1.

According to the third aspect of the present invention, there is provided a sensor for confirming the presence of the packaged object in the support corner gutter which has arrived at the conveyor position where the packaged article is inserted into the packaging material band. Since the AND signal with the detected detection point detection sensor is used as an input signal to stop the conveyor,
If the support box gutter corresponding to the selected sensor is not supplied with the package, that is, if there is no supply, or if the support box gutter that is not selected next to the package has the package, the conveyor will pass straight through. The conveyor runs to the position where the items to be packaged are supplied to the supporting corner gutter and is stopped.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments including the inventions described in all claims are shown in FIGS. In the figure, F is a packaging material strip formed by half-folding the thermoplastic synthetic resin film strip,
One is a bent edge F1 and the other is an open edge F2. As the wrapping material strip F, as shown in FIG. 7 or FIG. 8, the wrapping material strip F used in the present invention may be one provided with a hanging tag 10 when the wrapping body B is formed at the bent edge F1. include. In addition, as shown in FIG. 8, the packaging material strip F of the present invention may be one in which two films on one side of the packaging material strip are joined by a pressure-sensitive adhesive F4.
include. Reference numeral 11 denotes a pair of gripping type transfer rollers that hold the packaging material strip F and send it downward, and intermittently convey the packaging material strip F by a length equivalent to one bag. Reference numeral 12 is a double or bifurcated guide, which is provided immediately downstream of the transfer roller 11 and has a base 13 for the machine frame 14.
It is fixed by attaching / detaching means 15 such as screwing. 1
Reference numeral 6 denotes a heat sealer including a pair of jaws provided on the further downstream side of the guide 12, and in the illustrated example, two jaws 17 each bent into an L shape are used to weld and fuse two sides of the packaging material strip F at a time. This is a heat sealer. The heat sealer 16 is preferably an impulse type heat sealer.

The height of the welding portion F3 formed in the packaging material strip F by the heat sealer 16 in the transverse direction is
A chain conveyor 20 having a slightly higher conveying surface is provided horizontally along the vicinity of the open edge F2, and its conveying direction extends in the horizontal direction at a right angle to the packaging material belt F.

In this chain conveyor 20, two kinds of wide and narrow support corner gutters 22a and 22b are alternately fixed to 20 chain elements 21 of the chain conveyor, and the directions of the support corner gutters 22a and 22b are respectively. It is provided in the transverse direction, and the height of the standing wall 23 of each supporting corner gutter 22 is about 1/2 to 2/3 of the height of the article C to be supported.

One of the sprocket gear shafts 25 of the chain conveyor 20 rotates in the relationship of one cycle or an integral multiple of the wide and narrow support angle gutters, and the sprocket gear shafts 25 are rotated during one complete rotation. Corner gutters 22a, 22
b moves for 3 cycles. An operating plate 26, which is a kind of a rotating body, is attached to the sprocket gear shaft 25, which is a disk in the example shown in the figure. is there. Along with this operating plate 26, there are provided a first sensor 28 and a second sensor 29, each of which is composed of a light emitting portion and a light receiving portion, as detection point sensors, and these have a phase difference of 60 ° around the sprocket gear shaft 25. And is provided in the machine frame 14, and the first
The position where the sensor 28 detects the recess 27 is where the wide support corner gutter 22a coincides with the position of the open edge F2,
The position where the second sensor 29 detects the recess 27 is where the narrow support corner gutter 23b coincides with the position of the open edge F2.

The shape of the rotating body is the shape of the first and second sensors 2
It depends on the types of 8 and 29, and in the case of the sensor composed of the photoelectric element as described above, it is a kind of light shielding plate, and the one provided with the recess 27 or the hole as the detection point as described above is used.
When the first and second sensors 28 and 29 are microswitches, the rotating body 26 is a cam plate having a projection or a recess 27 on the circumference, and the projection or the recess 27 is a detection point, and the circumference of the cam is the same. The stylus or touch roller of the microswitch is brought into contact with the surface.

Further, these first and second sensors 28, 29
Is a proximity switch, the ferromagnetic rod is projected from the sprocket gear shaft 25 in the radial or diametrical direction,
The tip of this rod is the detection point, and is provided so that it passes near the sensor. The first sensor 28 and the second sensor 29 are selectively switched by a changeover switch 30.

Reference numeral 35 denotes a pushing device for pushing the article C to be packed into the packing material band F, which is provided at a position opposed to the packing material band F by sandwiching the chain conveyor 20 and is integrated with the piston of the air cylinder device 36. The pressing member 37 moves in the supporting corner gutters 22a or 22b at that position, and the article C to be packed therein is pushed into the packaging material belt F, and the pressing member 3
7 is provided so that it can be returned to its original position. Reference numeral 38 is a solenoid valve for performing this operation, which is connected to an air tank 39 and a compressor 40, which are sources of pressurized air, by an air line 41.

Reference numeral 42 is a support corner gutter 22a, 22b at the insertion position.
It is a third sensor for detecting whether or not there is an object to be packaged C inside, and in the example shown, slightly above the upright wall 23 of the support corner gutters 22a, 22b at the insertion position,
A third sensor 42 including a light emitting element and a light receiving element is provided so that the light beam passes obliquely when seen in a plane. D is a control device, and the chain conveyor 2 is controlled by the input of the first or second sensor 28, 28 and the presence detection sensor 42.
This is a sequencer that issues a command signal for stopping the motor M that drives 0, and also issues a command signal for sequentially operating the solenoid valve 38 and other operating parts of the packaging device. On the outside of the control device D, a changeover knob 43 for operating the changeover switch 30 and a switch button 4 for starting and stopping the packaging device.
4 is equipped.

Operation of the embodiment Similarly to the invention described in claims 1 to 3, one of the packaging material strips F as shown in FIG. 6 to FIG. 8 is passed from the upstream side of the transfer roller 11 to the open edge. Forked guide 1 from F2
2 and insert the end of the wrapping material band F into the heat sealer 16
Hang down below a pair of chins. Next, the number of objects to be packaged C to be packaged in one package B is determined, and corresponding to this number,
The support corner gutters 22a and 22b are selected, and when the number of the selected objects to be packaged C is large, for example, the wide support corner gutters 22a are used, and the objects to be packaged C are supplied only into these.

Since the number of the supplied packaged items C is large,
All the objects C to be packaged are in a state of standing upright in the respective supporting corner gutters 22a. Next, in order to select the first sensor 28 corresponding to the wide support corner gutter 22a, the switching knob 43 of the control device D is operated, the switching switch 30 is switched to the first sensor 28 side, and the switch button 44 is pressed. Operate the entire device. The operation of this device will be described with reference to the signal flow chart shown in FIG. When the switch button 44 is pressed, the power supply E is turned on first, and the flip-flop 45
Is turned on, the motor M of the chain conveyor 20 is activated, and the chain conveyor 20 starts operating. As the chain conveyor 20 operates, the sprocket gear shaft 25 and the operating plate 26 rotate together, and even if the recess 27 is detected by the first sensor 28, if the object C to be packaged is not supplied to the support corner gutter 22a, the third Since the sensor 42 does not output, the chain conveyor 20 continues to operate.

When the support gutter 22a supplied with the object to be packaged C arrives at the position where the third sensor 42 is located and the first sensor 28 detects the recess 27 at the same time, these first gutters are detected.
When the sensor 28 detects the recess 27, the first sensor 28 and the third sensor 42 generate an output signal, and the flip signal 45 is inverted by the AND signal to stop the motor M and the conveyor belt 20.

By this stop signal, the heat sealer 16 of the packaging apparatus A is activated and comes close to each other, so that the packaging material band F is welded and cut in the transverse direction. Simultaneously with the operation of the heat sealer 16, the solenoid valve 38 of the pushing device 35 is actuated to push out the piston of the cylinder device 36, and the pushing member 37 integral with this is advanced to advance the object C to be packaged in the support gutter 22a. Is inserted into the opened packaging material band F from the opening edge F2, the solenoid valve 38 is reversed, and the pushing member 37 is pulled out from the inside of the support corner gutter 22a. The return of the pushing member 37 is detected by the fourth sensor 46, and the chain conveyor resumes operation.

By the output of the fourth sensor 46 for the return of the pushing member 37 and the AND signal of the separation of the heat sealer 16, the transfer roller 11 conveys the one packaging bag material band F and stops. Hereinafter, the packaged object C supported by the support corner gutter 22a
Performs the same operation every time when the position of the second sensor 42 is reached.

Finally, even if the chain conveyor is not stopped, in the packaging material band F below the heat sealer 16,
When the article C to be packaged is detected by the fifth sensor 48, the heat sealer 16 operates once again. Even if the third sensor 42 outputs an output signal when the object to be packaged C is erroneously supplied to the support corner gutter 22b corresponding to the sensor that is turned off,
Since the first sensor 28 does not output, the flip-flop 45 does not invert. Therefore, the conveyor 20 does not stop,
The pushing device does not operate, the transfer roller 11 does not operate, and the packaging material band F remains stopped at that position.

On the other hand, when the number of objects to be packaged C is small,
The support gutter 22b is used, and the changeover switch 30 is inverted by the changeover knob 43 toward the second sensor 29 side. Thereafter, as in the previous time, the chain conveyor 20 is stopped at the position where the second sensor 29 outputs the output signal, and the supporting corner gutter 22b is opened at the opening edge F of the packaging material belt F.
The chain conveyor will stop when it reaches position 2. The other operations are the same as when using the wide support corner gutter 22a, and thus the description thereof is omitted. When the power source E is turned off, the push-in member 37 causes the support corner gutters 22a and 22b.
The flip-flop 45 is actuated by the AND signal from the fourth sensor returned from the above, and the motor M, the chain conveyor 20, and the packaging apparatus A are stopped.

In the above description, the third sensor 42 for detecting whether or not there is the article C to be packaged in the support corner gutter 22a or 22b that has arrived at the position of the packaging material belt F is provided with the embodiment.
It is an embodiment of the invention described in claim 3. This third sensor 4
The first sensor 28 or the second sensor 2
If the output signal of 9 is used as a signal for closing the power source of the motor M as it is to ensure the supply of the target support corner gutters 22a and 22b to be packaged C, the invention according to claim 1 or 2 It becomes an example of. The number of types of the support gutters is two, but the number is three, and the number of sensors in the operation plate 26 is also a number corresponding thereto, which is also included in the embodiment of the present invention. The timing at which the jaw 17 of the heat sealer 16 is actuated is not particularly limited as long as it is after the flip-flop 45 and the motor M are turned on and before the chain conveyor 20 is stopped.

[0029]

According to the invention of claim 1, which has the above-mentioned structure and functions, the supporting angle gutters and the chain conveyor are provided with two or more kinds of supporting angle gutters, so that the supporting angle can be adjusted according to the number of articles to be packaged. The gutters are used properly, and the changeover switch allows the stop position of the chain conveyor to accurately match the support corner gutter used with the open edge position of the packaging material strip, thus ensuring that the material to be packaged is accurately aligned with the packaging material strip. Has the effect of being sent to. In the device according to claim 2, since there are only two types of the supporting gutters having different widths, the difference is obvious, and there are few supply errors when supplying the objects to be packaged to the supporting gutters, and the device can be used as the device. Do not complicate.

In the apparatus according to the third aspect, a sensor is provided for detecting whether or not the object to be packaged is present in the supporting corner gutter which is pushed into the packaging material strip and is aligned with the position where the object to be packaged is pushed. Since the motor and the chain conveyor are stopped by the AND signal detected by the body detection part, the chain conveyor continues to run without being stopped if the support box gutter is not supplied with the objects to be packaged. Therefore, a time loss due to a supply error is slight and the overall packaging efficiency is hardly reduced. Effects of Embodiments The embodiments include all the effects of claims 1 to 3.

[Brief description of drawings]

FIG. 1 is a schematic front view of an example.

FIG. 2 is a plan view.

FIG. 3 is an explanatory side view of a chain conveyor portion.

FIG. 4 is a signal flowchart.

FIG. 5 is a side view showing a defective supply state.

FIG. 6 is a front view of a packaging material strip.

FIG. 7 is a front view of another packaging material strip.

FIG. 8 is a cross-sectional view of yet another packaging material strip.

[Explanation of symbols]

 F Packaging material band F1 Folding edge F2 Open edge F3 Welding part 10 Doug 11 Transfer roller 12 Guide 13 Base 14 Machine frame 15 Attachment / detachment device 16 Heat sealer 20 Chain conveyor 21 Chain elements 22a, 22b Support corner gutter 23 Standing wall 25 Spooket gear shaft Plate 27 Recessed portion B Package C Object to be packaged D Control device 28 First sensor 29 Second sensor 30 Changeover switch 35 Pushing device 36 Air cylinder 37 Pushing member 38 Electromagnetic valve 39 Air tank 40 Compressor 41 Airline 42 Third sensor 43 Switching 44 Switch button 45 flip-flop

Claims (3)

[Claims] 1. A transport roller for intermittently transporting a half-folded packaging material strip, a guide for separating two films at the open edges of the packaging material strip from each other on the downstream side of the transport roller, and this guide. On the downstream side of, at each stop of the transfer roller, phase pressure contact from both side surfaces of the packaging material strip,
Equipped with a heat sealer consisting of a pair of jaws that separate from each other,
At a position slightly upstream of the heat sealer, on the open edge side of the packaging material band, a chain conveyor that conveys a plate-shaped object to be packaged is provided, and the object to be packaged on the chain conveyor is separated from the open edge of the packaging material band. In a packaging apparatus including a pushing device that pushes into a packaging material band, transverse support sluices for supporting an article to be packaged having at least two widths are sequentially and repeatedly arranged on the chain conveyor. One rotation of one of the sprocket gear shafts of the conveyor and one cycle of the wide and narrow support gutters of the gutter are associated with the same number or an integral multiple, and the sprocket gear shaft has a detection point corresponding to the cycle. A rotating member is provided, and in the machine frame near this rotating member,
At least two sensors for detecting the detection points are provided, and each of these sensors is adapted to the phase when each corresponding support corner gutter on the chain conveyor corresponds to the corresponding packaging material band position. The control device is provided with a changeover switch for selectively selecting the sensor, the conveyor is stopped for each detection signal of the selected sensor, and a return completion signal of the package pushing device is provided. Is a conveyor reactivation signal. 2. The packaging device, wherein the supporting corner gutters are of two types, and the number of the detection sensors is also two. 3. A sensor for detecting the presence of an object to be packaged on an incoming support corner gutter is provided at a conveyor position where the object to be packaged is inserted into the packing material strip, and the output of this sensor and the selected one are selected. A packaging device characterized in that an AND signal with a detection signal of a detection point detection sensor is used as a conveyor stop signal.