JPH08133241A - Packaging apparatus with scale - Google Patents

Abstract

PURPOSE: To obtain a packaging apparatus with a scale wherein a tray can be carried into a lift position while being held in a proper posture and a structure of a tray carry-in means for carrying the tray is simple. CONSTITUTION: A tray carry-in means 2 with a scale K comprises a plurality of carry-in conveyer belts 53 parallel to one another which are integrally continuous from a tray supply end where a tray is supplied to a lift position. The scale includes a scale body 61 placed below the supply end, a mount 62 floatingly provided on the body 61, and a scale conveyer 63 having a plurality of scale conveyer belts 70 rotated at the same speed as that of the belt 53 and supported on the mount. Each of the belts 70 has a horizontal tray receive 70a placed through a slit between the respective belts 53 at a higher position than the upper face of the belt 53 and a slant tray transfer part formed of a part on the lift position connected to the receive and entering slantly under the belt upper face.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an article such as food in a dish-shaped container (hereinafter referred to as tray).
The present invention relates to a wrapping device with a scale, in which a wrapping machine that wraps the tray together with a stretchable transparent film incorporates a scale that measures the weight of the article in order to perform pricing according to the weight of the article.

[0002]

BACKGROUND OF THE INVENTION Stretchable transparent films, ie,
A wrapping machine that uses a stretch film to wrap the stretched film wound from a stretched film in the width direction or the like to pull out the stretched end of the stretched film, and the stretched stretched end from below the article. In the state where the tray in which is stored is pressed, the feeding end portion is folded by appropriate folding means from both sides in the width direction and both sides in the longitudinal direction of the film with respect to the tray containing the articles to the outer surface of the bottom portion of the tray, respectively. The tray is automatically packaged. A scale-equipped packaging device in which a scale for obtaining weight data for pricing the articles is incorporated in the packaging machine is known from Japanese Patent Publication No. 6-2486.

In the packaging apparatus disclosed in this publication, the tray loading means for moving the tray to the lift position for pressing the tray against the stretched stretch film is a pusher conveyor to which the tray is supplied and a belt connected to the pusher conveyor. The pusher conveyor is provided with a scale.

The balance has tray mounting portions located on both sides in the width direction of the endless chain forming the pusher conveyor. The tray placed on the placing part is pushed and moved by a rod-shaped pusher provided in the chain to be carried on the belt conveyor, and the belt conveyor carries the received tray to the lift position. Has become.

In addition to this, the tray carry-in means is composed of a front belt conveyor and a rear belt conveyor on which the scale is arranged, and the entire front conveyor is provided so as to be movable up and down between a descending position and an ascending position. Some are known.
The tray mounting portion of the scale is projected above the belt upper surface of the conveyor when the pre-stage conveyor is in the lowered position, and is located below the belt upper surface of the conveyor when the pre-stage conveyor is in the raised position. Further, the front-stage conveyor has the same height as that of the rear-stage conveyor at its raised position and is continuous horizontally.

Therefore, in the wrapping apparatus with a scale equipped with such tray loading means, when the pre-stage conveyor is in the lowered position, the tray containing the articles is placed on the scale and its weight is measured. After this, the tray is transferred onto the belt surface by raising the pre-stage conveyor to the raised position. In this way, the weighed tray supported on the front stage conveyor is transferred to the rear stage conveyor via the front stage conveyor, and is moved to the lift position which is the end portion of the rear stage conveyor.

[0007]

In the packaging device with scale described in Japanese Patent Publication No. 6-2486, the tray carrying-in means has a structure in which two conveyors (pusher conveyor and belt conveyor) are continuously provided. However, there is a problem that the structure is complicated.

In addition, when the tray is transferred from the scale to the pusher conveyor, the tray that is stationary on the scale is pushed and moved by the moving pusher so that the posture of the tray changes improperly depending on the impact. There is a high possibility that the tray will change its posture even when the tray is transferred from the pusher conveyor to the belt conveyor. This is especially promoted when oil adheres to the surface of the tray mounting portion of the balance. Further, since the pusher has two rods, when packing small trays among various sizes of trays, one pusher is used to transfer from the scale to the pusher conveyor. Especially, the posture of the tray is likely to change greatly. In addition, if the packaging work is performed in advance and only the weighing rooting work is performed later on the thus wrapped tray using the same packaging device,
When the tray is transferred from the scale to the pusher conveyor, the posture of the tray is likely to change depending on the variation in the state of close contact of the stretch film wrapping the tray with the outer bottom surface of the tray.

By the way, the amount of pull-out of the stitch film and the degree of extension thereof in the width direction are determined based on the size of the tray in the horizontal and vertical directions, which is automatically detected during loading. Therefore, when the posture of the tray changes improperly as described above, the length and width of the tray to be detected become large in terms of measurement, and the size of the tray cannot be detected properly. The withdrawal amount will be larger than the proper amount. In addition, if the posture of the tray changes improperly, when the stretch film is packaged against the posture, the tray is likely to move, and packaging defects are likely to occur.

Further, in the conventional case, which is equipped with a tray carry-in means consisting of a pair of front and rear belt conveyors, the conveyor has two conveyors.
In addition to the above, there is a problem that the structure is complicated because an elevating mechanism for vertically moving the entire pre-stage belt conveyor is required. Moreover, since the tray is transferred from the front-stage belt conveyor to the rear-stage belt conveyor, the posture of the tray is likely to change inappropriately at that time, and based on this, the pull-out amount of the stretch film becomes larger than the proper amount. At the same time, there is a problem that defective packaging is likely to occur.

An object of the present invention is to allow a tray containing articles to be carried into a lift position while maintaining an appropriate posture, and
An object of the present invention is to obtain a packaging device with a scale that can simplify the configuration of the tray loading means for loading.

[0012]

SUMMARY OF THE INVENTION According to the present invention, a tray containing an article is carried by the tray carry-in means to a lift position composed of a transporting end portion of the tray carry-in means, and the tray below the film is fed from the film supply section. A pressing machine that raises the tray from the lift position, the film is folded from both sides in the width direction and both sides in the longitudinal direction of the bottom outer surface of the tray, respectively, and a packaging machine for packaging the tray,
It is premised on a packaging device with a scale, which is attached to this packaging machine and comprises a scale for weighing the tray containing the articles before the packaging.

In order to achieve the above object, the invention according to claim 1 is characterized in that the tray carry-in means comprises a plurality of trays continuously connected from the tray supply end portion to which the tray is supplied to the lift position. The scale has parallel carry-in conveyor belts, and the scale is a balance main body disposed below the tray supply end, a platform floatingly mounted on the scale main body, and the carry-in conveyor belt. And a scale conveyor supported on the mounting table having a plurality of scale conveyor belts that are rotated in the same direction at the same speed as the scale conveyor, and the scale conveyor is higher than the top surface of each of the carry-in conveyor belts. The belt is formed by a horizontal tray receiving portion arranged at a high position and a portion on the lift position side connected to the tray receiving portion, and passes through the inter-belt gap between the respective carry-in conveyor belts. It slipped obliquely below the surface is obtained and a slant of the tray transfer unit.

In order to achieve the same object, the invention according to claim 2 is characterized in that the tray carry-in means is integrally continuous from the tray supply end portion to which the tray is supplied to the lift position. Of the rubber carrying conveyor belts parallel to each other, wherein the balance is a balance main body arranged below the tray supply end, and a mounting table floatingly provided on the balance main body, A plurality of tray receivers having a horizontal upper end projecting on the platform and passing through the inter-belt gap between the respective carry-in conveyor belts and arranged at a position higher than the belt upper surface of the respective carry-in conveyor belts, Each of the carry-in conveyor belts has a plurality of belt push-up rollers provided on the upper surface of the conveyer belt so that the belt push-up rollers are provided so as to be contactable from the lower side thereof, and the belt push-up rollers are mounted horizontally on the tray receiver. Those having a belt surface variable mechanism that moves across the first position below the edge and a second position higher than the horizontal shape upper.

[0015]

According to the first aspect of the present invention, the tray carry-in means for carrying in the tray is integrally provided at the lift position where the tray is pressed against the film to be fed from below, to the lift position from the tray supply end. Since it has a continuous carry-in conveyor belt, the tray carry-in means is a single belt conveyor, and the mechanism for moving the whole conveyor up and down is also unnecessary, and the trays supplied on this conveyor Can be carried into the lift position.

Since the tray receiving portion of the scale conveyor belt on the platform provided in the tray arranged at the tray supply end portion is projected higher than the belt upper surface of the carry-in conveyor belt, the tray to this receiving portion is provided. The weighing machine weighs the tray and the articles stored in the tray as it is placed. After this weighing, the carry-in conveyor belt and the scale conveyor belt rotate, and the scale conveyor belt gradually lowers the supporting height of the tray already weighed at the tray supply end, and transfers this tray to the upper surface of the carry-in conveyor belt. . This delivery is performed via the oblique tray delivery section of the scale conveyor belt, and both belts are synchronously rotated at the same speed in the same direction, so that delivery is smoothly performed. The tray thus delivered is then carried into the lift position by the carry-in conveyor belt of the tray carry-in means, and is not delivered midway.

Also in the second aspect of the invention, the tray carry-in means for carrying in the tray is integrally provided at the lift position where the tray is pressed against the film to be fed out from below the tray supply end portion to the lift position. Since it has a continuous carry-in conveyor belt, the tray carry-in means is a single belt conveyor, and a mechanism for moving the whole conveyor up and down is also unnecessary, and the tray supplied on this belt. Can be carried into the lift position.

Since the upper end of the tray receiver on the mounting table provided on the tray arranged at the tray supply end is projected higher than the belt upper surface of the carry-in conveyor belt, the tray can be placed on the tray receiver. The weighing scale weighs the tray and the items stored therein. At the time of this weighing, the belt surface varying mechanism is in a non-operating state, and the belt push-up roller is moved away from the back surface of the carry-in conveyor belt at the tray supply end or away from the back surface of the carry-in conveyor belt, and the belt push-up roller The height of the upper surface of the belt is held at a lower first position below the upper end of the tray receiver.

After the weighing, the belt surface changing mechanism is in an operating state and pushes up the belt upper surface of the carry-in conveyor belt from the back surface thereof with elastic deformation at the tray feeding end portion through the belt pushing roller. Thereby, the heights of the respective belt push-up rollers and the upper surface of the belt are held at the second position higher than the upper end of the tray receiver, and the weighed tray on the tray receiver is transferred to the upper surface of the belt. This delivery simply involves lifting the tray above the belt. Further, since the carry-in conveyor belt is rotated after the delivery, the tray is not carried into the lift position by the carry-in conveyor belt of the tray carry-in means and is not delivered during the process.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. A packaging apparatus with a scale, the overall configuration of which is shown in FIG. 1, includes a packaging machine J for automatically packaging a tray containing articles using a stretch film, and a scale K attached to the packaging machine J for weighing the tray. Is equipped with.

The packaging machine J is provided with a frame 1 in which a frame front plate 1a and a frame rear plate 1b, which are vertically opposed to each other, are connected by a plurality of connecting bars extending across them, and a tray is carried into the frame 1. Means 2 and tray unloading means 3
And a film supply unit 4. Further, as shown in FIGS. 5 and 6, the packaging machine J includes a gripping roller 6 that is brought into contact with and separated from a film folding roller 5 included in the tray carry-out means 3 from below, a pull-out gripper 7, and a pull-out gripper 7.
A pair of folding grippers 8 and 9, a lifter 10, and FIG.
And the cutter mechanism 11 shown in FIG.

Although the details of the tray loading means 2 will be described later, the loading means 2 is disposed so as to penetrate the frame front plate 1a.
The front part is located on the front side of the frame front plate 1a, and the rear part is located between the frame front plate 1a and the frame rear plate 1b. A tray B (see FIGS. 5 and 6) in which articles A such as foods are stored in advance is supplied to the front portion of the tray transport unit 2, and the tray B is moved to the front of the frame by the transport operation of the tray loading unit 2. The sheet is carried in to a lift position which is a conveyance end portion between the plate 1a and the frame rear plate 1b. The tray B is made of a lightweight material such as expanded polystyrene and has a square planar shape.

The tray carry-out means 3 is arranged between the front plate 1a of the frame and the rear plate 1b of the frame so as not to be directly above the rear part of the tray carry-in means 2 and adjacent thereto. It is projected to the side of 1. As shown in FIG. 2, the tray carry-out means 3 includes a carry-out frame 21, a carry-out conveyor 23 driven by the power of an electric motor 22, an electric heater 24 located inside the conveyor 23, and the film folding roller. 5 and a plurality of carry-out rollers 25 to 28 are attached.

The film folding roller 5 is the carry-out frame 2
The tray carry-in means 2 is disposed at one end of the tray carry-in means 2, and the carry-out rollers 25 to 28 are arranged between the tray carry-in means 2 and the carry-out conveyor 23. These rollers 5, 25 to 28 are provided in parallel with each other and extend in the front-rear direction,
In both cases, the power of the electric motor 22 is set to the chain transmission means 2
It is given via 9 and is rotated in the same direction synchronously. The arrow in FIG. 2 indicates the unloading direction of the tray B by the tray unloading means 3.

As shown in FIG. 1, the film supply section 4 provided below the tray unloading means 3 includes a pair of parallel supporting rollers (not shown) for supporting the roll 31 around which the stretch film F is wound. And a rotation lever 33 having a guide roller 32 for guiding the stretch film F fed from the roll 31 supported at one end and pivotally supported at the other end.
And a film dispenser (not shown).
The stretched film F fed out is guided by the guide roller 32.
The film is guided to the film dispenser via the, and is delivered to a position immediately below the film folding roller 5 in the tray carry-out means 3 through the dispenser.

The procedure for packaging the tray B by the packaging machine J having the above-described structure is shown in FIGS. 5 and 6. First, FIG.
When the tray B is carried into the lift position in the frame 1 by the carrying operation of the tray carry-in means 2 as shown in FIG. 5A, the gripping roller 6 is moved to the film folding roller 5 as shown in FIG. 5B. The pull-out gripper 7 approaches the tray unloading means 3 in a state where the pull-out gripper 7 pulls out the feeding end of the stretch film F projected from the film dispenser 34.

Next, as shown in FIG. 5C, the pull-out gripper 7 is returned according to the size of the tray B, and the stretch film F is pulled out. Prior to this, the gripping roller 6 sandwiches the feeding end portion of the stretch film F between the gripping roller 5 and the film folding roller 5, so that the pulling-out end portion F1 has an appropriate tension depending on the resistance of the rollers 5 and 6. Be withdrawn. The relationship between the pull-out end portion F1 and the folding grippers 8 and 9 in this state is shown in FIG. 6 (A). The folding grippers 8 and 9 are at the initial position separated from both side edges of the pulling-out end portion F1. It is located in.

Thereafter, as shown in FIG. 6 (B), the folding grippers 8 and 9 are moved toward each other so as to separately grasp both side edges of the pull-out end portion F1, and then, as shown in FIG. 6 (C).
They are moved away from each other as shown in. As a result, the pull-out end portion F1 is pulled from both sides in the width direction and pre-stretched. Next, as shown in FIGS. 5D and 6D, respectively, the lifter 10 is operated to further extend the pre-stretched drawer end portion F1 and further extend the tray B.
Push up. The lifter 10 is moved up and down through an inter-belt space between the carry-in conveyor belts, which will be described later.

Next, as shown in FIG. 6 (E), the folding grippers 8 and 9 are moved toward each other so that the folding grippers 8 and 9 come into contact with the outer surface of the flat bottom portion B1 of the tray B, respectively. After folding both side edges of the drawer end F1 along the outer surface of the bottom B1 of the tray B, the folding grippers 8 and 9 are opened and returned to the initial position. As described above, the pull-out end portion F1 of the stretch film F is folded into the outer surface of the bottom portion B1 of the tray B from both sides in the width direction of the tray B. The state in which this folding is completed is shown in FIG.

Along with this folding operation, a part of the lifter 10 that interferes with the folding grippers 8 and 9 is pushed by the folding grippers 8 and collapses, and the folding grippers 8 and 9 return to their initial positions. It is erected by the force of the spring.

Next, as shown in FIG. 5 (E), the pull-out gripper 7 is brought closer to the tray unloading means 3 again. Therefore, the folding plate (not shown) integral with the gripper 7 is first attached to the outer surface of the bottom B1 of the tray B. To come in contact with
The pull-out direction side of the pull-out end portion F1 gripped by the pull-out gripper 7 is folded along the outer surface of the bottom portion B1 of the tray B. With the subsequent movement of the pull-out gripper 7, the tray B is pushed via the push plate 7a provided on the pull-out gripper 7, and is moved so as to ride on the film folding roller 5 of the tray carry-out means 3.

Then, as the tray B is unloaded by the unloading operation of the tray unloading means 3, the stretch film F is unwound on the outer surface of the bottom B1 of the tray B as shown in FIG. 5 (F). Fold along. As described above, the feeding end portion of the stretch film F is folded into the outer surface of the bottom portion B1 of the tray B from both sides in the longitudinal direction of the tray B.

Finally, as shown in FIG. 5G, the cutter mechanism 11 is operated to cut the feeding end of the stretch film F below the tray B. Thereby, the packaging of the tray B is completed. The tray B thus packaged is then heated from below by the electric heater 24 when passing over the carry-out conveyor 23 of the tray carry-out means 3 as shown in FIG. 5 (H). As a result, the stretch films F, which are overlapped with each other on the outer surface of the bottom portion B1 of the tray B, are brought into close contact with each other, so that the packaging state can be prevented from being collapsed. The step of FIG. 5 (H) is the same as the step of FIG. 5 (B), and the steps of FIG. 5 (B) to FIG. 5 (H) are repeated after the initial packaging.

The cutter mechanism 11 shown in FIG.
Is a cutter 36 arranged below the tray unloading means 3.
And a cutter drive unit 37. Cutter 36
Is formed by a blade holder 36a and a cutter blade 36b connected to the blade holder 36a and having a saw-toothed blade edge. The cutter driving unit 37 includes a solenoid 3 having a plunger 38a.
8, connection link 39, first link holder 40, second link holder 41, first and second parallel links 42,
43 and a return spring 44. Reference numeral 45 is a fixing member such as a frame. Parallel links 42 and 43,
The vertical portion of the blade holder 36a forms a parallel movement mechanism using the second link holder 40 as a fixed node. One end of the first parallel link 42 of the parallel movement mechanism is integrally provided with a link convex portion 42a that is perpendicular to the first parallel link 42.
The other end of the connecting link 39 is rotatably attached to the tip of a.

Therefore, the solenoid 38 is excited,
The connecting link 39 is moved in the direction of the cutter 36 against the return spring 44 via the plunger 38a, so that the cutter 36 moves through the parallel movement of the parallel movement mechanism.
Is translated in the upward direction. When the excitation of the solenoid 38 is released, the cutter 36 is translated downward by the spring force of the return spring 44. And the cutter 36
Is lifted from the position shown in FIG. 3 which does not hinder the feeding of the stretch film F,
Cross over the payout end of and cut this end to a length sufficient for packaging.

Further, the packaging machine J detects the length, width, and height of the tray B by a sensor (not shown) during the transportation of the tray B by the tray loading means 2 in the above packaging, and Based on the control means (not shown), the pull-out amount and the pre-stretching amount of the stretch film F and the lifted position of the lifter 10 are set in accordance with the size of the tray B.

Next, the tray loading means 2 will be described with reference to FIGS. This carry-in means 2 is 1
Book front end roller 51, a plurality of rear end rollers 52, and a plurality of rubber carry-in conveyor belts 53 extending in the front-rear direction and integrally continuous from the tray supply end to the lift position.
It has and.

The front end roller 51 is rotatably attached to the front end of a carry-in frame 54 which is fixed by penetrating the frame front plate 1a. A portion of the carry-in frame 54 surrounded by a portion projecting forward of the frame front plate 1 a forms a tray supply end portion of the tray carry-in means 2. Each rear end roller 52 is rotatably attached to a roll holder 55 arranged side by side with the front and rear frames 1a and 1b being brought closer to the frame rear plate 1b side therebetween. Each endless carry-in conveyor belt 53 includes a front end roller 51 and a rear end roller 5.
It is wound around 2 and is stretched in the front-back direction and arranged in parallel with each other. The upper belt portion of each of these carry-in conveyor belts 53 is provided horizontally.

The transporting end portion of the tray carrying-in means 2 having the above structure is at a lift position where the tray B is pressed against the pull-out end portion of the stretch film F from below through the lifter 10. The lifter 10 is moved up and down through the carry-in conveyor belts 53 at the lift position.

Reference numeral 56 in FIGS. 2 and 3 denotes a frame front plate 1a.
Is a first conveyor motor composed of a pulse motor mounted on the outer surface of the conveyance frame 54 adjacent to one side surface thereof, and is connected to a drive toothed pulley 57 fixed to its output shaft and one end of the front end roller 51. Driven toothed pulley 58
A toothed belt 59 is wound around these and. These form the carrying-in conveyor driving means.

By operating this drive means, the tray carry-in means 2 carries out a carry-in operation, and in that operation, the first conveyor motor 56 causes the measured tray B to be measured.
The driving pulse is applied in the number of steps corresponding to the magnitude of the operation. As a result, regardless of the size of the tray B, the tray B to be loaded can be properly set at the lift position.

The scale K will be described with reference to FIGS. This scale K includes a scale body 61 and a mounting table 62.
And a scale conveyor 63. The balance main body 61 is placed on the balance placing table 64 (see FIG. 1) projecting from the front side of the frame front plate 1a below the carry-in frame 54 so as to face the tray supply position. The balance main body 61 includes a measuring unit, a calculating unit, and a converting unit, and the measuring unit measures the total weight of the weight of the tray B containing the articles and the weights of the platform 62 and the scale conveyor 63. And the platform 62 and the scale conveyor 6 from the measured values by the calculation unit.
The weight of 3 is subtracted, the true weight of the tray B containing the articles A is output to a rooter (not shown), and the price corresponding to the true weight is priced by the conversion unit. Output to a container.

The mounting table 62 is arranged so as to cover the scale main body 61 from the upper side thereof and is provided in a floating manner, so that the total weight is exerted on the measuring section of the scale main body 61.

The scale conveyor 63 extends from the platform 62 vertically to the first and second conveyor frames 65 and 66, and the first to third horizontal rotary shafts 67 to 69 parallel to each other.
And a plurality of scale conveyor belts 70 are attached across the rotary shafts 67 to 69, and any one rotary shaft is connected to the conveyor drive means.

More specifically, the first and second rotary shafts 67 and 68 are arranged at the same height apart from each other in the front-rear direction, and the third rotary shaft 69 is more than the first and second rotary shafts 67 and 68. It is arranged at a low height position, on the opposite side of the first rotating shaft 67 with the second rotating shaft 68 as a boundary, in other words, at a position rearward of the second rotating shaft 68. Each of the rotating shafts 67 to 69 has a plurality of pulleys 71 to 71 that rotate integrally with them.
73 are mounted corresponding to each other.

An endless scale conveyor belt 70 extending in the front-rear direction is wound around the corresponding pulleys 71 to 73. The belt portion between the first and second rotating shafts 67 and 68 of the scale conveyor belt 70 forms a horizontal tray receiving portion 70a, and the second and third rotating shafts 68,
The belt portion between 69 forms an oblique tray transfer portion 70b that gradually lowers toward the third rotation shaft 69 side.

The conveyor driving means is a second conveyor motor 7 composed of a pulse motor installed on the mounting table 62.
Fixing the drive toothed pulley 75 to the output shaft of 4, and
A driven toothed pulley 76 is fixed to one end of the second rotating shaft 68 that penetrates the first conveyor frame 65, and a toothed belt 77 is wound around these pulleys 74 and 75.

The scale conveyor 63 of this construction rotates the scale conveyor belt 70 by driving the second conveyor motor 74. The arrow in FIG. 4 indicates the direction of the rotational force applied to the scale conveyor belt 70. Then, by the motor control means (not shown)
The conveyor motor 77 is operated in synchronization with the first conveyor motor 56, and is controlled so as to rotate the scale conveyor belt 70 at the same speed as the carry-in conveyor belt 53 in the same direction.

One of the two conveyor frames of the weighing conveyor 63, for example, the second conveyor frame 66, extends to a position higher than the tray receiving portion 70a. The upper portion of the second conveyor frame 66 has a tray receiving portion 70a.
When the tray B is placed on the tray, one end of the tray B is applied to the tray B to be used as a carry-in positioning plate 66a that determines a reference position for carrying in.

1 to 3, reference numeral 54a is a vertical flat plate-like loading positioning plate provided on the loading frame 54 so as to overlap the second conveyor frame 66. This positioning plate 54a is used as the tray loading means 2 in the case of a packaging device in which the scale K optionally attached is omitted.
It is used to determine the reference position for loading the tray B at the tray supply end of the tray.

The scale conveyor 63 having the above-described structure is mounted on the mounting table 62 with the scale conveyor belt 70 parallel to the carry-in conveyor belt 53. Then, in this installed state, the tray receiving portion 70a of each weighing conveyor belt 70 passes through the inter-belt gap between the carry-in conveyor belts 53, and is higher than the upper surface of the upper belt portion of these belts 53, that is, the belt upper surface. It is located in a high position. Similarly, the third rotation shaft 69 of the tray transfer section 70b of each balance conveyor belt 70 continuous to the tray reception section 70.
Side, in other words, the lift position side portion sunk into the lower side of the upper surface of the belt, whereby the tray transfer portion 70b is provided obliquely intersecting the upper surface of the belt through the inter-belt gap. Has been.

Reference numeral 12 in FIG. 1 denotes a door which opens and closes the tray entrance portion of the frame 1 by rotating around the upper end portion thereof, which is interlocked with the operation of the carry-in conveyor belt 53 and opens during its endless traveling, and , Can be closed when stopped.

Next, the carrying in of the tray B to the lift position by the tray carrying-in means 2 in the packing operation in the packing apparatus with scale having the above-mentioned structure will be described.

First, in the state before carrying in the tray B, the first,
Both the second conveyor motors 56 and 65 are stopped. In this state, the tray B in which the articles A are stored outside the frame 1 is supplied to the tray supply end portion of the tray carry-in means 2 by the operator. At this time, the tray B is placed on the tray receiving portion 70a of the scale K while being positioned by applying one end thereof to the carry-in positioning plate 66a of the second conveyor frame 66. That is, the tray B is supplied to the tray supply end portion in a proper posture. Then,
The weight of the tray B is measured by the scale K without being disturbed by the carry-in conveyor belt 53.

When this measurement is completed, the first and second conveyor motors 56 and 65 are driven in synchronization based on the signal, so that the carry-in conveyor belt 53 and the scale conveyor belt 70 are synchronized with each other at the same speed. And is rotated in the same direction. Then, as the scale conveyor belt 70 rotates, the tray B supported by the scale conveyor belt 70 is conveyed toward the inside of the frame 1.
The slanted transfer part 70b gradually lowers the height position and transfers the transfer position to the carry-in conveyor belt 53. By the way, as described above, the conveyor belts 53 and 70 are synchronously rotated at the same speed and in the same direction, so that the posture of the tray B is less likely to be changed improperly during the delivery, and the delivery is not performed. Implemented smoothly.

In this way, the tray B delivered to the carry-in conveyor belt 53 is subsequently carried on the carry-in conveyor belt 53 from the tray supply position toward the lift position which is the carrying end position of the belt 53. Since the conveyance to the lift position is performed by a single belt conveyor and is not passed in the middle of the conveyance, the posture of the tray B is unlikely to be inappropriately changed by the conveyance operation by the carry-in conveyor belt 53.

As described above, when the tray B is carried in, the tray B is supplied to the tray supply position in the proper posture without changing the posture of the tray B inappropriately, and is moved to the lift position while maintaining the posture. Can be brought in.

Therefore, in the packaging with the stitch film F, it is possible to prevent the disadvantage that the amount of pull-out of the stretch film becomes larger than the proper amount due to an inappropriate posture change at the time of loading the tray, and at the time of loading the tray. It is also possible to prevent the tray from moving arbitrarily during the packaging due to the inappropriate posture change of the above and causing the packaging failure.

Further, in the above construction, since the tray loading means 2 has the loading conveyor belt 53 which is integrally continuous from the tray supply end to the lift position, the loading means of the tray B is a single unit. There is no need for a single belt conveyor and a mechanism for vertically moving the entire single conveyor in order to transfer trays from the scale K to the tray carry-in means 2. Therefore, the structure of the tray loading means 2 for loading the tray B into the lift position where the tray B is pressed against the stretch film F from below can be simplified.

7 to 9 show a second embodiment of the present invention. The second embodiment is different from the first embodiment only in the structure of the carry-in positioning means for determining the carry-in reference position of the tray at the tray supply position, and other structures are shown in FIGS.
Since it has the same configuration as that of the packaging device with scale of the first embodiment shown in FIGS. 1 to 6 including a portion not shown in FIG. 6, the configuration not shown is substituted with FIGS. The same components are designated by the same reference numerals as those in the first embodiment, and a description of those components and an explanation of the operation and effect based thereon will be omitted. However, these same components are also part of the configuration of the device of this embodiment. It is a part.

In the second embodiment, the second conveyor frame 66 of the balance K has the same height as the first conveyor frame 65, and its upper end is substantially the same as the upper surface of the tray receiving portion 70a of the balance conveyor belt 10. It is placed at the same height. The carry-in frame 54 has a vertical carry-in positioning plate 54a adjacent to the second conveyor frame 66. The positioning plate 54a penetrates the frame front plate 1a and reaches the tray entrance of the frame 1.
The tray B supplied to the tray supply position is placed on the tray receiving portion 70a of the scale K with one end thereof being brought into contact with the carry-in positioning plate 54a of the carry-in frame 54. As a result, the tray can be positioned in an appropriate posture and supplied to the tray supply position.

The structure other than this point is the same as that of the first embodiment. Therefore, also in the second embodiment, the initial object of the present invention can be achieved by the same operation as that of the first embodiment.

10 to 13 show a third embodiment of the present invention. The third embodiment is different from the first embodiment only in the structure of the scale K, and other structures are shown in FIGS.
Since it has the same configuration as that of the packaging device with scale of the first embodiment shown in FIGS. 1 to 6 including a portion not shown in FIG. 6, the configuration not shown is substituted with FIGS. The same components are designated by the same reference numerals as those in the first embodiment, and a description of those components and an explanation of the operation and effect based thereon will be omitted. However, these same components are also part of the configuration of the device of this embodiment. It is a part.

The balance K of the third embodiment has a balance main body 61 arranged below the tray supply end, a mounting table 62 floatingly provided on the balance main body 61, and a plurality of tray receivers 81.
And a belt surface variable mechanism 82 and a carry-in positioning plate 83.

The balance main body 61, which is placed facing the tray supply position, includes a measuring section, a calculating section, and a converting section, and the weight of the tray 2 containing the articles by the measuring section and the platform 62.
And all members 81-83 mounted on this top surface
The total weight of the article A and the weight of all the members 81 to 83 mounted on the platform 62 and the platform 62 is calculated by the calculation unit. The true weight of the tray B containing is output to the rooting device (not shown), and the conversion unit outputs the price corresponding to the true weight to the pricing device.

The platform 62 is arranged so as to cover the scale main body 61 from the upper side thereof and is provided in a floating manner so that the total weight is exerted on the measuring section of the scale main body 61.

Each tray receiver 81 has a U-shaped configuration in which both ends of a horizontal upper end extending in the front-rear direction are bent downward at a right angle. These tray receivers 81 are provided in parallel with each other so as to project on the mounting table 62. Each tray receiver 81 is
The horizontal upper end is provided at a position higher than the upper surfaces of the upper belt portions of the belts 53, that is, the upper surfaces of the belts, through the inter-belt spaces between the plurality of carry-in conveyor belts 53.

As shown in FIGS. 12 and 13, the belt surface varying mechanism 82 is arranged below the upper belt portion of the carry-in conveyor belt 53. The variable mechanism 82 includes a solenoid 84 with a plunger, first to fourth links 85 to 88, and a plurality of belt push-up rollers 89.
, Fulcrum shafts 90 and 91, and a return spring (not shown).

The first to fourth links 85 to 88 are connected by forming a parallelogram link mechanism. The first and second links 85 and 86 which are parallel to each other are separately pivoted at their longitudinal middles by fulcrum shafts 90 and 91, respectively.
It is rotatably provided around these axes 90 and 91 around the axes. In addition, 85a and 86a are long holes into which the pivot pins for the third link 87 are fitted. First, second
One end of a third link 87 arranged across the lower ends of the links 85 and 86 is pivotally attached to a plunger of a solenoid 84.

Therefore, the link mechanism is rotated so that the first and second links 85 and 86 are erected when the solenoid 84 is excited and the plunger is pulled in (see FIG. 13). Further, when the excitation is released, the return force of the return spring (not shown) causes the first and second links 85 and 86 to rotate so as to be inclined (see FIG. 12). The return spring is stretched between the link mechanism and the mounting table 62.

The belt push-up rollers 89 are respectively supported by pivots pivotally connecting the fourth link 88 and the first and second links 85 and 86 in the link mechanism. Two belt push-up rollers 89 are prepared for each carry-in conveyor belt 53, and these rollers 89 are provided so as to be in contact with the lower surface of the upper belt portion of the carry-in conveyor belt 53 in accordance with the operation of the link mechanism. Then, these belt push-up rollers 89 are moved between a first position below the horizontal upper end of the tray receiver 81 and a second position higher than the horizontal upper end, whereby the upper side of the carry-in conveyor belt 53 at the tray supply position. The height position of the belt upper surface of the belt portion can be changed.

The carry-in positioning plate 83 is provided so as to stand vertically on the upper surface of the mounting table 62 and to overlap the inner surface of the carry-in positioning portion 54a of the carry-in frame 54. As with the second conveyor frame 66 of the weighing conveyor described in the first embodiment, one end of the tray B supplied to the tray supply position is brought into contact with the positioning plate 83 so that the tray B can be properly loaded. It is for positioning. In addition,
By omitting the positioning plate 83, the carry-in positioning portion 54
The tray B loaded in a may be positioned in an appropriate posture.

The structure other than the above is the same as that of the first embodiment, and therefore, the packaging operation of the tray B using the stretch film is also the same as that of the first embodiment.

Next, the tray B to the lift position by the tray carry-in means 2 in the packaging apparatus with scale according to the third embodiment.
The carrying in of will be described.

First, in the state before the tray B is loaded, the first conveyor motor 56 is stopped. In this state, the belt surface variable mechanism 82 arranged at the tray supply end of the tray carry-in means 2 is in a non-operating state, and the first and second links 85, 86 of the link mechanism are slanted as shown in FIG. And the belt pushing roller 8 supported by the link mechanism.
9 is arranged at a first position, for example, a position below the upper surface of the belt, on the back surface side of the upper surface of the corresponding conveyor belt 53. Therefore, the upper surface of the carry-in conveyor belt 53 is horizontal, and the upper end of the tray receiver 81 is projected to a position higher than the horizontal upper surface of the belt. The belt push-up rollers 89 arranged at the first position may be separated from or in contact with the back surface of the belt upper surface as shown in FIG.

In this state, the tray B storing the articles A outside the frame 1 is moved by the operator to the tray loading means 2
Is supplied to the tray supply end of the. At this time, tray B is
The one end is placed on the tray receiver 81 of the scale K while being positioned by applying it to the carry-in positioning plate 83 of the second conveyor frame 66. In this way, the tray B is supplied to the tray supply end portion in a proper posture. Then, the weight of the tray B is measured by the scale K without being disturbed by the carry-in conveyor belt 53.

When this measurement is completed, the solenoid 84 of the belt surface varying mechanism 82 is excited based on the signal.
Then, with the link operation of the link mechanism of the mechanism 82, the first and second links 85 and 86 stand up substantially vertically as shown in FIG. 13 to move each belt pushing roller 89 to the second position. . At this time, each carry-in conveyor belt 5
A pair of belt push-up rollers 89 respectively corresponding to 3
Are preferably arranged on the front and rear sides of the tray receiver 81, respectively.

Therefore, at the tray supply end, the upper belt portion of each carry-in conveyor belt 53 is simultaneously and separately pushed up by the corresponding pair of belt push-up rollers 89 from the back side thereof, and the upper end of the tray receiver 81. It is placed higher than. It should be noted that the deformation of each of the carry-in conveyor belts 53 due to such push-up can be realized with elasticity thereof because these belts 53 are made of rubber.

As the height position of the upper surface of each carry-in conveyor belt 53 is changed at the tray supply end, the tray B placed on the tray receiver 81 is simultaneously lifted by each carry-in conveyor belt 53. The tray receiver 81 is separated (delivered) from the upper end of the tray receiver 81.
In such a delivery, the posture of the tray B is unlikely to change, and the delivery is smoothly performed.

Next, since the first conveyor motor 56 is driven while the operating state of the belt surface varying mechanism 82 shown in FIG. 13 is maintained, the carry-in conveyor belt 53
Is rotated. Then, the tray B is subsequently carried on the carry-in conveyor belt 53 from the tray supply position to the lift position which is the carrying end position of the belt 53. Since the conveyance to the lift position is performed only by a single carry-in conveyor and is not transferred in the middle of the process, there is little possibility that the posture of the tray B is inappropriately changed by the carrying operation by the carry-in conveyor belt 53. . In addition,
During this carry-in, each belt push-up roller 89 is rotated following the traveling of the carry-in conveyor belt 53.

As described above, when the tray B is carried in, the tray B is supplied to the tray supply position in an appropriate posture without changing the posture of the tray B inappropriately, and the tray B is moved to the lift position while maintaining the posture. Can be brought in. In addition,
After this loading, the excitation of the solenoid 84 is released, the belt surface variable mechanism 82 returns to the non-operating state, the tray receiver 81 is projected from the belt upper surface, and the next tray B is prepared for supply. is there.

Therefore, also in the third embodiment, in the packing with the stitch film, the pull-out amount of the stretch film becomes larger than the proper amount due to the improper posture change of the tray B during the loading. It is possible to achieve the intended purpose of the present invention that there is no inconvenience and that defective packaging of the tray B can be prevented.

The present invention is not limited to the above embodiment. For example, the present invention can also be applied to a packaging device that performs packaging on a tray after previously cutting a film into a length sufficient for packaging.

The present invention is not limited to a wrapping device with a scale, but can be applied to a wrapping device (a wrapping and pricing device) which is integrated with a pricing device or can be combined to issue a pricing label based on weighing. Applicable. In this case, the pricing machine is provided on the frame side plate 1b side facing the tray carry-out means 3, and the stretch film F by the electric heater 24 is provided.
A label (not shown) is attached to the tray B, which does not move when the tray B comes in close contact with the outer bottom surface, or another conveyor (not shown) continuously provided on the tray unloading side of the tray unloading means 3. We installed a pricing machine on the side of
A label may be attached to the tray B on another conveyor.

[0085]

As described above in detail, according to the packing-equipped packaging apparatus of the present invention according to claims 1 and 2, the tray is carried into the lift position where the tray is pressed against the film to be fed from below. The tray carry-in means comprises a single belt conveyor, and a mechanism for moving the whole carry-in means up and down is unnecessary, so that the tray carry-in means can be simply constructed. Furthermore, there is less risk of the tray posture changing improperly during the transfer of the tray from the scale to the belt surface of the carry-in conveyor belt after the weighing and the carry-in operation to the lift position of the tray only by the carry-in conveyor. It is possible to carry in a tray, which is supplied in a proper posture at the end portion, to the lift position from the tray supply end portion while keeping the proper posture.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a packaging device with a scale according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a configuration of tray loading means provided in the packaging device with scale according to the first embodiment.

FIG. 3 is a cross-sectional view of the tray carry-in means taken along line ZZ in FIG.

FIG. 4 is a perspective view showing a configuration of a scale included in the packaging device with a scale according to the first embodiment.

5 (A) to (H) are views showing, in the order of steps, the packaging procedure in the longitudinal direction of the film by the packaging device with a packaging scale according to the first embodiment.

FIG. 6A to FIG. 6F are diagrams showing, in the order of steps, a packaging procedure in the film width direction by the packaging device with a scale according to the first embodiment.

FIG. 7 is a perspective view showing a configuration of a packaging device with a scale according to a second embodiment of the present invention.

FIG. 8 is a plan view showing a configuration of tray loading means provided in the packaging device with scale according to the second embodiment.

9 is a sectional view of the tray carry-in means taken along line YY in FIG.

FIG. 10 is a perspective view showing a configuration of a packaging device with a scale according to a third embodiment of the present invention.

FIG. 11 is a plan view showing the configuration of tray loading means provided in the packaging device with scale according to the third embodiment.

12 is a cross-sectional view of the tray loading means shown in FIG. 11 taken along the line XX in a state where the loading conveyor belt of the tray loading means shown in FIG. 11 is in a low position.

13 is a cross-sectional view of the tray loading means shown in FIG. 11 taken along line XX in a state where the loading conveyor belt of the tray loading means shown in FIG. 11 is at a high position.

[Explanation of symbols]

 A ... Article, B ... Tray, F ... Stretch film, J ... Wrapping machine, K ... Scale, 2 ... Tray loading means, 53 ... Loading conveyor belt, 61 ... Scale body, 62 ... Loading platform, 63 ... Scale conveyor, 70 ... scale conveyor belt, 70a ... tray receiving part of scale conveyor belt, 70b ... transfer part of scale conveyor belt, 81 ... tray receiver, 82 ... belt surface variable mechanism, 89 ... belt pushing roller.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] September 8, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0061

[Correction method] Change

[Correction content]

In the second embodiment, the second conveyor frame 66 of the scale K has the same height as the first conveyor frame 65, and the upper end thereof is substantially the same as the upper surface of the tray receiving portion 70a of the scale conveyor belt 70. It is placed at the same height. The carry-in frame 54 has a vertical carry-in positioning plate 54a adjacent to the second conveyor frame 66. The positioning plate 54a penetrates the frame front plate 1a and reaches the tray entrance of the frame 1.
The tray B supplied to the tray supply position is placed on the tray receiving portion 70a of the scale K with one end thereof being brought into contact with the carry-in positioning plate 54a of the carry-in frame 54. As a result, the tray can be positioned in an appropriate posture and supplied to the tray supply position.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yukihiro Takada 2-6-13 Nakameguro-ku, Meguro, Tokyo Inside Tech Meguro Office

Claims (2)

[Claims] 1. A tray containing an article at a lift position composed of a transport end portion of a tray carry-in means is carried in by the tray carry-in means, and a film fed from a film supply section is lifted from the lift position below the film. A packaging machine for pressing the tray and folding the film from both sides in the width direction and both sides in the longitudinal direction to the outer surface of the bottom of the tray, respectively, and a packaging machine for packaging the tray, which is attached to the packaging machine and contains the articles before the packaging. In a packaging device with a scale, which comprises a scale for weighing the weight of the tray, the tray carry-in means includes a plurality of trays that are integrally continuous from the tray supply end portion to which the tray is supplied to the lift position. The scale comprises parallel carry-in conveyor belts, and the scale is provided on the scale main body disposed below the tray supply end and in a floating manner on the scale main body. And a weighing conveyor supported on the loading platform having a plurality of weighing conveyor belts that are rotated in the same direction at the same speed as the carry-in conveyor belt, and the weighing conveyor, A horizontal tray receiving portion disposed at a position higher than the belt upper surface of each of the carry-in conveyor belts and a portion of the lift position side connected to the tray receiving portion, and a belt between the carry-in conveyor belts. A wrapping device with a scale, comprising: an oblique tray transfer part that obliquely sunk into the lower side of the upper surface of the belt through a gap. 2. A tray containing an article at a lift position composed of a transport end portion of the tray loading means is loaded by the tray loading means, and the tray fed from the film feeding section is loaded with the tray from the lift position therebelow. A wrapping machine that presses and folds the film from both sides in the width direction and both sides in the longitudinal direction of the tray to the outer surface of the bottom of the tray to wrap the tray, and a tray mounted on the wrapping machine and containing the articles before the wrapping. In a packaging device with a scale, comprising: a scale for weighing the weight, the tray carry-in means comprises a plurality of parallel rubbers which are integrally continuous from a tray supply end portion to which the tray is supplied to the lift position. A weighing-in / carrying-conveyor belt, wherein the scale is provided below the tray supply end, and the scale is provided in a floating manner on the scale main body. And a horizontal upper end projecting on the mounting base and passing through the inter-belt gap between the respective carry-in conveyor belts and arranged at a position higher than the belt upper surface of the respective carry-in conveyor belts. A plurality of tray receivers and a plurality of belt push-up rollers provided on the upper surface of each of the carry-in conveyor belts so that the belt push-up rollers are provided so as to be contactable from the lower side thereof, and are mounted on the mounting table. And a belt surface variable mechanism for moving the belt position variable mechanism over a first position below the horizontal upper end and a second position higher than the horizontal upper end.