JPH07315547A - Device for feeding article to be packed to packing machine - Google Patents

Abstract

PURPOSE:To improve the working efficiency by carrying and feeding an article to be packed to a lift device one by one even when the article to be packed is continuously loaded on the starting end of the feeding position. CONSTITUTION:A feeding device is provided with a first belt conveyor 1 which is constantly operated, a second belt conveyor 9 whose carriage speed is faster than that of the conveyor 1, a stopper 16, a detecting sensor 23 to detect the presence/absence of an article W0 to be packed, and a control device 25. The control device 25 moves the stopper 16 to release the advancement stop of the article W0 to be packed based on the fore end detection signal of the article W0 to be packed by the detecting sensor 23 and the acceptance admitting signal of a lift device M2, and operates the second belt conveyor 9 for a specific period of time so that the article W0 to be packed is be carried to the packing position S, and returns the stopper 16 based on the rear end detection signal of the article W0 to be packed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrapping machine for wrapping an article to be packaged on a tray together with a tray using a stretch film, and a wrapping position at which a lifting device is provided for the article to be packaged. The present invention relates to a packaged object supply device that conveys and supplies the object.

[0002]

2. Description of the Related Art Conventionally, in a stretch film packaging machine,
At the lower position of the stretch film such as polyvinyl chloride having a predetermined length sandwiching the peripheral edge, that is, at the packaging position where the lift device is arranged, first, the packaged article in which the packaged article is placed on the tray. Then, the lift device raises the packaged object, and the upper surface of the packaged object is covered with the stretched film, and then the film is clamped to the lower surface side of the packaged object. The excess film was folded to wrap the article to be packaged.

As described in Japanese Utility Model Laid-Open No. 3-49210, a conventional package supply device is composed of a plurality of round belts, and the front end is located at the package position (at this position). (A lift device is arranged), a stopper arranged at an intermediate portion of the belt conveyor, and a detection sensor arranged at a rear end portion of the belt conveyor for detecting the presence or absence of the object to be packaged. It was prepared for.

In the package supply device of the above publication, if the package is placed at the rear end of the belt conveyor, the detection sensor first detects the presence of the package, and the belt conveyor is operated. The stopper rises and the stopper stops the article to be packaged at an intermediate portion of the belt conveyor.

After that, when the object to be packaged, which has been supplied to the lifting device in the previous cycle, completes the packaging and the lifting device returns to the original position, the stopper descends in conjunction with it and the object to be packaged advances. Release the stop.

Therefore, by the operation of the belt conveyor,
The items to be packaged are conveyed and supplied to the packaging position where the lift device is arranged, and the items to be packaged are sequentially packaged by the operation of the lift device.

[0007]

However, in the conventional object-to-be-packaged supplying device, it is necessary to place one object to be packaged at the rear end of the belt conveyor, and the object to be packaged is continuously conveyed to the belt conveyor. If it is placed at the rear end, all the articles to be packaged placed on the belt conveyor will be conveyed and supplied to the lift device, which makes packaging impossible.

Therefore, in the conventional object-to-be-packaged supply device,
At the rear end of the belt conveyor, which is the starting end of the supply position, the worker receives one by one for each cycle in which the packaging of the packaged object is completed.
Since the objects to be packaged were placed individually, the work efficiency was poor.

The present invention is intended to solve the above-mentioned problems, and even if articles to be packaged are continuously placed at the starting end of the supply position,
An object of the present invention is to provide a packaged object supply device for a packaging machine, which can convey and supply the packaged objects one by one to the lift device and improve the work efficiency.

[0010]

A package supply device according to the present invention is a package supply device for a packaging machine, which conveys a package up to a packaging position where a lift device is arranged.
A first belt conveyor on which the object to be packaged is placed and which is always operated, and the first belt conveyor connected to the first belt conveyor,
A second belt conveyor which is operated at a higher speed than the conveyor speed of the belt conveyor, and which is operated for a certain period of time until the object to be packaged is conveyed to the packaging position, and between the first and second belt conveyors. , A stopper is provided which is controlled by the control device to stop the advance of the packaged object, and a detection sensor for detecting the presence or absence of the packaged object is provided on the first belt conveyor side near the stopper, Based on a front end detection signal of the packaged object of the detection sensor and a reception permission signal of the lift device, the control device moves the stopper to cancel the forward stop of the packaged object, and The two-belt conveyor is operated for a certain period of time, and the stopper is returned based on the rear end detection signal of the article to be packaged.

It is desirable that a low friction member is disposed on the contact surface of the first belt conveyor with the object to be packaged.

[0012]

In the packaged object supply apparatus according to the present invention, when the packaged objects are sequentially placed at the rear end of the first belt conveyor which is the start end of the supply position, the packaged object at the top becomes
It will move forward until it contacts the stopper.

Then, if the lift device has completed the preparation for receiving, the control device moves the stopper based on the front end detection signal of the object to be packaged by the detection sensor and the acceptance permission signal of the lift device. The forward stop of the object is released and the second belt conveyor is operated for a certain time.

Then, the first article to be packaged is conveyed and supplied to the packaging position by the second belt conveyor.

At this time, even if the succeeding object to be packaged is continuously conveyed on the first belt conveyor so as to come into contact with the first object to be packaged, the conveying speed of the second belt cover is higher than that of the first belt conveyor. The item to be wrapped at the top is second because it is fast
When it is started to be conveyed to the belt conveyor, a gap is created between it and the front article to be packaged.

Therefore, the detection sensor can detect the rear end of the top packaged object, and the control unit resets the stopper to dispose the packaged article at the advance / stop position of the packaged object. , Transfer to the second belt conveyor is restricted.

After that, if the lift device has completed the preparation for receiving the object to be packaged, the control device stops the stopper based on the front end detection signal of the succeeding object to be packaged by the detection sensor and the acceptance permission signal of the lift device. Is moved to release the forward stop of the succeeding packaged object and the second belt conveyor is operated for a certain period of time, so that the succeeding packaged object is conveyed and supplied to the packaging position by the second belt conveyor. The above process will be repeated.

Therefore, in the object to be packaged supply apparatus according to the present invention, even if the objects to be packaged are continuously placed at the starting end of the supply position, the objects to be packaged can be conveyed and supplied to the lift device one by one. The efficiency can be improved.

Then, the worker may put a large number of items to be packaged together on the starting end of the supply position, and until all the placed items are packaged, the other items to be packaged will be packed. Lightweight work can be performed, and packaging work can be performed very efficiently.

If a low-friction member is arranged on the contact surface of the first belt conveyor with the object to be packaged, the object to be packaged stopped by the stopper will come into contact with the constantly operating first belt conveyor. However, since the frictional resistance with the first belt conveyor is reduced, it is possible to prevent the posture from being lost or the position from being displaced.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

The article supply device M1 of the embodiment is shown in FIG.
As shown in FIG. 2, a first belt conveyor 1 arranged so that its rear end is projected from the packaging machine M0, and a second belt whose rear end is connected to the first belt conveyor 1 and whose front end is arranged at the packaging position S. The conveyor 9 and the stopper 16 arranged between the first belt conveyor 1 and the second belt conveyor 9.
And a detection device 23 disposed on the first belt conveyor 1 side near the stopper 16 and a control device 25.

The first belt conveyor 1 is provided with a bed 7 having four slits 7a which are arranged in the horizontal direction and are formed along the conveying direction of the article W0 to be packaged.
The chain belt 2 which is driven to circulate is arranged at a.

Each chain belt 2 is, as shown in FIG. 3, an inner link 2b connected by an outer link 2a made of metal.
Is a so-called "placombi chain" formed of a synthetic resin such as polyethylene having reduced frictional resistance with a conveyed object, and includes a sprocket 3a provided on a rotatable shaft 3 on the front end side and a rear end. It is wound around a sprocket 4a provided on the side drive shaft 4.

A sprocket 4b around which a chain 6 is wound is fixed to the drive shaft 4, and the chain 6 is wound around a sprocket 4b and a sprocket 5b provided on a drive shaft 5a of the motor 5.

The driven shaft 3, the drive shaft 4, the motor 5, and the bed 7 are held by the frame 50 of the packaging machine M0.

The second belt conveyor 9 is composed of six circles arranged so that the rear end of the chain belt 2 of the first belt conveyor 1 is shifted horizontally in the left and right direction so as not to interfere with the front end of the chain belt 2. The belt 10 is provided.

Each round belt 10 is wound around a pulley 11a fixed to each of three rotatable driven shafts 11 and a pulley 12a fixed to one drive shaft 12,
The front end side is arranged at the packaging position S.

A sprocket 12b around which a chain 14 is wound is fixed to the drive shaft 12, and the chain 14 is wound around a sprocket 12b and a sprocket 5b provided on a drive shaft 13a of the motor 13.

The driven shaft 11, the drive shaft 12, and the motor 13 are held by the frame 50 of the packaging machine M0.

The stopper 16 is arranged between the first belt conveyor 1 and the second belt conveyor 9 at the front end of each chain belt 2 at the rear end of each round belt 10,
The upper portion is provided with a comb portion 16a in which a concave portion 16b into which each round belt 10 is inserted is formed.
The comb portion 16 a is projected above the bed 7 from between the spaces.

The stopper 16 has a bent portion 16c at the lower end.
Is fixed to the front end portion 17a of the connecting lever 17, and the connecting lever 17 has a rear end portion 17b rotatably mounted on the drive shaft 4 and has a connecting rod 18 attached to a bracket portion 17c extending downward from an intermediate portion. Is supported.

The lower end of the connecting rod 18 is pivotally supported by a crank plate 19 fixed to a drive shaft 21a of a motor 21 held by a frame 50, and the crank plate 19 is provided with a shield plate portion 19a. . The motor 21 is
It operates to rotate intermittently by 80 °.

In the frame 50 around the shield plate portion 19a, transmissive photoelectric switches 20A and 20B are arranged at symmetrical positions in the horizontal direction. When the photoelectric switch 20A is shielded by the light shielding plate portion 19a,
The stopper 16 is arranged at the normal position, and the photoelectric switch 20
When B is shielded by the shading plate portion 19a, the crank plate 19 is rotated 180 ° by the drive of the motor 21,
Via the connecting rod 18 and the connecting lever 17, the stopper 1
The comb portion 16a of 6 moves downward and is arranged below the bed 7.

The photoelectric switch 20A is provided with the stopper 1
The photoelectric switch 20 detects that the comb portion 16a of No. 6 is arranged at the forward stop position of the article W0 to be packaged.
B is for detecting that the stopper comb portion 16a is arranged below the bed 7 and releases the forward stop of the article W0 to be packaged.

The detection sensor 23 is composed of a transmissive photoelectric switch having a light projecting element 23a and a light receiving element 23b. The light projecting element 23a and the light receiving element 23b are provided with a stopper 1
It is arranged so as to face each other on the left and right upper frames 50 on the first belt conveyor 1 side in the vicinity of 6.

The control device 25 is arranged at a predetermined position of the frame 50 and controls the operation of the packaging machine M0.
Explaining the control related to the package supply device M1, the signals from the detection sensor 23 and the photoelectric switches 20A and 20B and the pulse signal described below from the lift device M2 are input to the motor 13 and the motor 21. Control operation. Regarding the operation of the motor 5, the packaging machine M0
If a start-up switch (not shown) is turned on, the control device 25 starts when the control device 25 starts control.

When the control device 25 starts the control, it inputs the front end detection signal (signal from the light projecting to the light blocking of the photoelectric switch 23) of the object to be packaged W0, and the lift device M.
It is judged that the pulse signal when the pulse signal from 2 is input and counted up to a predetermined number is the acceptance permission signal from the lift device M2, the motor 21 is operated, the drive shaft 21a is rotated 180 °, and the stopper 16 Is moved to release the forward stop of the article W0 to be packaged and the motor 13 is operated for a certain period of time. Based on the signal), the motor 21 is operated, the drive shaft 21a is rotated again by 180 °, and the stopper 16 is returned.

The operation time of the motor 13 is such that when the second belt conveyor 9 is circularly driven,
It is the time for carrying from the position of the comb portion 16a of the stopper 16 to the contact with the stopper 28 at the packaging position S where the lifting device M2 is arranged.

The lift device M2 will be briefly described. The lift device M2 has a plurality of support rods 27 that are integrally lifted by driving a drive motor (not shown).
W to be packaged at the packaging position S
0 is lifted so as to bite into the stretch film F (see FIG. 6) arranged above. The support rod 27 will return to the lower position after the article W0 to be packaged is wrapped in the film F.

In the lift device M2, a drive motor (not shown) for raising and lowering the support rod 27 is provided with a rotary encoder for outputting a pulse signal to the control device 25, and the support rod 27 is lowered. The control device 25 counts the pulse signals from the rotary encoder from the bottom dead center to the top dead center, and the control device 25 counts the pulse signal from the bottom dead center to the top dead center, with the operation of returning to the bottom dead center from the dead center to the top dead center again as one cycle. 25 determines that the pulse signal output at the top dead center of the support rod 27 at the time of counting is the acceptance permission signal. By the way, the pulse signal at the time of the support rod 27 returning to the lower packaging position (the position of the bottom dead center of the support rod 27) S is not the acceptance permission signal, but the pulse signal at the position of the top dead center is the acceptance permission signal. The reason for judging is the second
This is because the support rod 27 is returned to the position of the bottom dead center before the article W0 to be packaged is conveyed to the packaging position S by the belt conveyor 9 to shorten the packaging speed of the packaging machine M0.

The mode of use of the package supply device M1 of this embodiment will be described. The start switch of the packaging machine M0 is turned on, and as shown in FIG. 1, after the first belt conveyor 1 at the beginning of the supply position. When the article W0 to be packaged with the article W2 to be packaged is sequentially placed on the tray W1 at the end, the motor 5
Is operated and each chain belt 2 of the first belt conveyor 1 is circulated and driven, so that the first packaged product W01
However, as shown in FIG. 4, it moves forward until it comes into contact with the comb portion 16a of the stopper 16.

If the lift device 2 has performed a predetermined operation in one cycle and has completed the preparation for receiving, the control device 25 causes the detection sensor 23 to detect the front end detection signal of the article W01 to be packaged and the lift device M2. Based on the acceptance permission signal, the motor 21 is operated and the motor 13 is operated for a fixed time. When the motor 21 is operated, the drive shaft 2
The crank plate 19 rotates 180 ° together with 1a, the comb portion 16a of the stopper 16 moves below the bed 7 via the connecting rod 18 and the connecting lever 17, and the stopper 16 releases the forward stop of the article W01 to be packaged. In addition, the motor 13
Is operated for a certain period of time to circulate and drive each round belt 10, so that the first article W01 to be wrapped is wrapped by the second belt conveyor 9 from the front end position of the first belt conveyor 1 as shown in FIG. It is conveyed and supplied to the position S.

At this time, even if the succeeding article W02 is continuously conveyed on the first belt conveyor 1 so as to come into contact with the first article W01, the first belt conveyor 1
Since the transport speed of each round belt 10 of the second belt cover 9 is faster than that of each of the chain conveyors 2 of FIG. Therefore, a gap h is generated.

Therefore, the detection sensor 23 can detect the rear end of the top package W01, and the control device 25 causes the motor 2 to move.
1 is operated to rotate the crank plate 19 by 180 °, and the stopper 16 is inserted through the connecting rod 18 and the connecting lever 17.
The comb portion 16a of the object W02 is returned to the forward stop position of the object W02 to be packaged.
Are restricted from moving to the second belt conveyor 9, as shown in FIG.

Thereafter, the object W0 to be packaged is lifted by the lift device M2.
1 is wrapped with the film F and the preparation for receiving the article W02 is completed, the control device 25 causes the detection sensor 2
The stopper 16 is moved via the motor 21 based on the front end detection signal of the subsequent packaged product W02 and the acceptance permission signal from the lift device M2 to release the forward stop of the subsequent packaged product W02, and Second through thirteen
Since the belt conveyor 9 is operated for a certain period of time, the subsequent article to be packaged W02 is conveyed and supplied to the packaging position S by the second belt conveyor 9, and the steps described above are repeated.

Therefore, the object-to-be-packaged supply device M of the embodiment
In 1, even if the articles W0 to be packaged are continuously placed at the starting end of the supply position, the articles W to be packaged can be conveyed and supplied to the lifting device M2 one by one at the packaging position S, and the work efficiency can be improved. it can.

Further, in the embodiment, the first belt conveyor 1
Each chain belt 2 which is the contact surface with the packaged object W0
If the inner link 2b as a low-friction member is arranged in the above, the packaged object W0 stopped by the stopper comb portion 16a is
Since the frictional resistance with the first belt conveyor 1 is reduced even when it is in contact with the first belt conveyor 1 which is constantly operated, it is possible to prevent the posture from being lost or the position to be displaced as much as possible.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of an object-to-be-packaged supplying device according to an embodiment of the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a partial perspective view of a first belt conveyor used in the embodiment.

FIG. 4 is a sectional view showing an operating state of the embodiment.

5 is a cross-sectional view showing an operating state of the embodiment, and FIG.
After the state shown in.

6 is a cross-sectional view showing an operating state of the embodiment, and FIG.
After the state shown in.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... 1st belt conveyor, 9 ... 2nd belt conveyor, 16 ... Stopper, 23 ... Detection sensor, 25 ... Control device, W0 (W01 * W02) ... Wrapping object, S ... Wrapping position, M0 ... Wrapping machine, M1・ ・ ・ Package supply device, M2 ・ ・ ・ Lift device.

Claims (2)

[Claims] 1. A package feeding device for a packaging machine that conveys a package to a packaging position where a lifting device is arranged, the first belt conveyer placing the package and being constantly operated. And connected to the first belt conveyor,
A second belt conveyor that is operated at a higher speed than the conveyor speed of the belt conveyor and that is operated for a certain period of time until the object to be packaged is conveyed to the packaging position, and between the first and second belt conveyors. A stopper is provided which is controlled by the control device to stop the forward movement of the article to be packaged, and on the first belt conveyor side near the stopper,
A detection sensor that detects the presence or absence of the packaged object is provided, and the control device moves the stopper based on a front end detection signal of the packaged object of the detection sensor and an acceptance permission signal of the lift device. While releasing the forward stop of the article to be packaged, the second belt conveyor is operated for a certain period of time, based on the rear end detection signal of the article to be packaged,
A packaged object supply device for a packaging machine, wherein the stopper is returned. 2. The packaged object supply device for a packaging machine according to claim 1, wherein the first belt conveyor has a low friction member arranged on a contact surface with the packaged object.