JPH09267801A - Packaging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save a filling period of time, and smooth the filling by a method wherein a filling funnel is provided for each pair of grips, and the filling funnel and the pair of grips are intermittently moved together. SOLUTION: For an intermittent driving means D, a stand 4 which rotatably supports an index shaft 2 is provided on the machine base 1 of a packaging machine. To a rotating body 5 being attaching to an upper part of the index shaft 2, a large number of grip pairs (g) are provided so as to project in the radial directions, in order to grip or release a bag (b). Also, on a peripheral edge 12 of an index wheel 10 being fixed to the lower end of the shaft 2, a plurality of following rollers 13 in two rows, are axially supported in an annular state alternately on the top and the bottom. In addition, on a cam shaft 14 being provided in parallel with the index shaft 2, two plate cams 20 are fixed. Then, when the two plate cams 20 rotate together with the cam shaft 14 by a motor device, the following rollers 13 are fed in order to intermittently rotate the index shaft 2, and a series of bag packings are systematically performed at each pair of grips (g), at a filling station.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary type packaging machine for bagging solid matter such as seeds and grains, granules and powder at a high speed.

[0002]

2. Description of the Related Art As a conventional rotary type packaging machine,
A large number of grip pairs are projected in the radial direction of the rotating body, and the supplied packaging bags are sequentially gripped in a suspended manner by each grip pair and intermittently moved to the opening station, filling station, top seal station, and other stations. ,
It is known that a predetermined amount of an object to be packaged is filled by using one filling funnel within a stop time of one step, the bag mouth is sealed, and then the bag is discharged. The packaging machine is configured to perform the above-mentioned intermittent rotary motion by an intermittent drive means using a Geneva mechanism, a cam type index mechanism, or the like, and usually has a packaging capacity of about 10 to 45 times per minute. There is.

[0003]

By the way, in response to the recent demand for higher efficiency of the packaging machine, the conventional packaging capacity of about 2 is used.
If an attempt is made to perform a wrapping process of about 60 to 150 times per minute, it will be difficult for the above-mentioned intermittent drive means to adapt to higher speeds. That is, in the intermittent driving means based on the Geneva mechanism, the movement angle and the stop angle are determined by the number of indexes, so there is little freedom in the ratio of movement and stop time, and the acceleration on the driven side is also discontinuous. In addition, the conventional general parallel cam type index means has a unit structure in which a series of mechanisms are housed in a box-shaped frame and immersed in oil, which is applied to a packaging machine to achieve high torque and high speed. If the device is designed to have a special movement angle and stop angle for the purpose, the cam mechanism becomes large, and the box-shaped frame becomes large. For this reason, it is practically difficult to compactly install the unit type index means in a narrow space in the base of the packaging machine in which various mechanisms have to be complicated.

Further, it is difficult to perform the filling in a short stop time by the conventional stationary type filling means in which the filling funnel is faced in the packaging bag at a certain position and the article to be packaged is introduced. Similarly, there was no measure for speeding up the measuring means.

Therefore, an object of the present invention is to provide a packaging machine in which the objects to be packaged are weighed and filled smoothly and quickly, and the packaging capacity is improved to about twice the conventional level.

[0006]

In order to achieve the above object, the present invention is directed to intermittently stopping and moving a rotating body provided with a large number of grip pairs in a radial direction for each of a plurality of stations by intermittent driving means. In a packaging machine in which a bag supported by the grip pair is filled with an object to be packaged weighed by a weighing means by a filling means, and a bag mouth is sealed before the bag is discharged. An indexing shaft for fixing the rotating body by the intermittent driving means is rotatably provided on the machine frame side, and an indexing wheel in which a plurality of follower rollers in two rows are annularly arranged is attached to the indexing shaft, and two plate cams are attached. A cam shaft fixed to the machine frame is rotatably provided on the machine frame, the cam surface of the plate cam is provided so as to contact the follower roller, and the follower roller is driven and rotated by the plate motor. Wherein the sequentially send La is configured to intermittently rotate the index shaft.

With regard to the weighing means in the packaging machine according to the above-mentioned claim 1, the hopper for supplying the articles to be packaged is provided at the upper end of the vertical axis rotatably supported by the disk stand erected on the machine stand. A weighing disk facing the supply port is attached, and a large number of weighing tubes are provided on the bottom plate of the weighing disk so as to project downward and arranged in an annular shape. A backslit member is provided and a shutter for closing or opening the bottom surface of the cylinder is provided, and the vertical axis is rotated in synchronization with the index axis by an auxiliary motor device, and the shutter is released by a bag opening confirmation signal at the filling station. Then, it is preferable that the object to be packaged in the measuring cylinder is discharged into the filling funnel.

In the filling means in the packaging machine according to the first aspect, a bracket is provided on a guide bar provided on the rotating body so as to be movable up and down, and a filling funnel corresponding to each of the grip pairs is provided on the bracket. In front of the filling station, a guide rail is provided around the outer surface of the drum that is mounted concentrically with the index shaft, and a roller that is freely rotatable on the bracket is placed on the guide rail to support the bracket. The station has a first slider provided with a first guide piece for receiving the roller,
At the rear station of the filling station, second sliders provided with a second guide piece for receiving the roller are provided in the drum so as to be movable up and down, and the first slider is moved down by the driving means at the station before the filling station. It is preferable that the dropping port of the filling funnel is inserted into the packaging bag, and the second slider is moved up by the driving means at the rear station of the filling station to cause the dropping port of the filling funnel to escape from the packaging bag.

[0009]

When the two plate cams are rotated together with the cam shaft by the motor device, the follower rollers are sequentially fed by the plate cams to intermittently rotate the index shaft having the rotor. As a result, the grip pair fixed to the rotating body sequentially holds the packaging bags supplied at the supply station in a suspended state and moves intermittently to the opening station for the next process. At this time, the filling funnel corresponding to each grip pair also moves around the drum, and the rollers of the filling funnel transfer onto the first guide piece at the opening station of the bag (the station before the filling station). Then, the first slider is lowered by the driving means to insert the drop opening of the filling funnel into the bag, and the filling funnel moves to the filling station in that state.

On the other hand, while the weighing disk rotates in synchronism with the rotating body, the shutter closing the bottom surface of the weighing cylinder at the filling station is released by the opening confirmation signal of the bag, and the object to be packed in the cylinder is filled in the filling funnel. To release. The shutter closes the bottom surface of the weighing cylinder after discharging the object to be packaged, and the object to be packaged supplied from the hopper is refilled in the measuring tube, and then the back-slitting member measures the amount and prepares for the next discharging.

In the rear station of the filling station, when the rollers of the filling funnel move over the second guide piece,
The driving means raises the second slider, and the drop opening of the filling funnel escapes from the packaging bag. Then, after the opening portion of the bag is sealed at the top sealing station, the bag is discharged to a conveyor or the like outside the machine by the bag taking-out means at the next discharging station. Thus, such a series of bag packing is continuously and systematically performed for each grip pair.

With respect to the intermittent drive means of this packaging machine, since it is possible to give the cam the movement characteristics of the follower roller intermittently with freedom, for example, 60 to 150 per minute.
A special cam (moving angle 240
.Degree., And a stop angle of 120.degree.), The bulkiness of the index mechanism does not increase, and a simple structure that is small and generates high torque can be obtained. As for the filling means, by providing a filling funnel for each grip pair and intermittently moving them together, it has become possible to obtain a filling time and perform the filling smoothly. With respect to the weighing means, since the object to be packaged is measured with a metering tube of a fixed quantity type and discharged within the moving time of the filling funnel, the object to be packaged can be easily and smoothly weighed. Therefore, this packaging machine has the advantage that it can smoothly and quickly measure and fill the objects to be packaged, and that the packaging capacity can be improved to about twice the conventional level.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing an outline of the packaging machine, FIG. 2 is a front view of a main part showing a part in section, and FIG.
5 is a perspective view showing a main part of the filling means, FIG. 4 is a plan view thereof, and FIG.
FIG. 4 is a front view showing a part of the weighing means in section.

This packaging machine mainly comprises an intermittent drive means D, a filling means F and a weighing means M, and as shown in FIG. 1, a bag supply station i, an opening station ii, filling stations iii and iv, and an idle station v. , Vi, top seal stations vii to ix, discharge station x, etc. The other components, such as the bag supply means, the top seal means, and the bag take-out means, are not included in the gist of the present invention, and a description thereof is omitted.

As shown in FIG. 2, with respect to the intermittent driving means D, a stand 4 is provided on a machine base 1 of the packaging machine, in which a vertically oriented index shaft 2 is rotatably supported by bearings 3. The dish-shaped rotating body 5 attached to the upper portion of the index shaft 2 has a bag b.
A number of grip pairs g for gripping or releasing the are provided radially protruding. 10 is the index axis 2
Is a disc-shaped index wheel that is fixedly fastened to the lower end of the wheel 10. A plurality of follower rollers 13 in two rows are alternately arranged in a ring shape on the peripheral portion 12 of the wheel 10 so as to be axially supported. The index number of the index wheel 10 is
It is set to 10 corresponding to the above 10 stations.

Reference numeral 14 denotes a cam shaft which is rotatably supported by a bearing 15 fixed to the machine base 1 and a bearing 17 fixed to a pedestal 16 in the machine frame 1a and which is provided in parallel with the index shaft 2. . A bevel gear 18 is provided at the lower end of the camshaft 14.
And a bevel gear 19 driven and rotated by a main motor device (not shown) and the gear 18 are meshed with each other.
In this embodiment, the rotation speed of the cam shaft 14 is reduced to 1/2 of the rotation speed of the motor device. Two
Reference numeral 0 denotes two plate cams fixed to the cam shaft 14, and the upper cam 21 and the lower cam 22 are integrally formed with different phases. In this embodiment, the moving angle is 240 ° and the stop is stopped. The angle is designed to be 120 °. The cam surfaces of the upper cam 21 and the lower cam 22 are provided so as to contact the upper and lower follower rollers 13, respectively.

The filling means F is a means for charging and filling objects to be packaged such as seeds and grains into the bag b. As shown in FIGS. 2 and 3, reference numeral 30 denotes a pair of guide bars which are provided upright at the central positions of the grip pairs g on the peripheral edge of the rotating body 5, and which are provided on the side surfaces of the slide plate 31 on the guide bars 30. Mating groove 3
The slide plate 31 is provided so that the slide plate 31 can move up and down. Almost L-shaped bracket 3 on the front of the slide plate 31
3 is attached, and the funnel 34 is fixed to the bracket 33 through the dropping port 35 of the filling funnel 34. In this embodiment, ten filling funnels 34 are provided, which is the same as the number of stations.

A drum 38 concentric with the index shaft 2 is attached to a boss 37 supported by a bearing 36 on the shaft end portion 2a of the index shaft 2 above the rotating body 5. 3
Reference numeral 9 denotes a plate-shaped guide rail that is circumferentially provided on the outer surface of the drum 38. A roller 40 rotatably provided on the slide plate 31 is placed on the guide rail 39 to support the slide plate 31. . Reference numeral 41 is a stay for fixing the drum 38 to the machine base 1 side so as not to rotate.

A first slider provided with a first guide piece 47 on the front surface of which a square slide bar 45 is erected at the position of the front station (opening station ii) of the filling station in the drum 38 and which receives the roller 40. 46 is provided so as to be vertically movable. Similarly, at the position of the rear station (idle station vi) of the filling station, a rectangular slide bar 48 is erected to vertically move a second slider 49 provided with a second guide piece 50 for receiving the roller 40 on the front surface. To be installed. Reference numerals 51 and 52 are holes formed in the drum 38 for providing the first guide piece 47 and the second guide piece 50.

Reference numeral 55 is a drive lever which is swingably supported by a bracket 56. A rod end 57 provided at one end of the lever 55 is attached to a side surface 49a of the second slider 49.
Connect to Reference numeral 58 denotes a drive rod having a lower end portion 58a connected to a cam lever 60 which is rocked by a cam 59 and an upper end portion 58b connected to the other end of the drive lever 55, which is passed through the index shaft 2. A rod end 63 provided at one end of an intermediate lever 62 that is swingably supported by a bracket 61 is connected to a side surface 49b of the second slider 49. Further, the rod end 64 provided at the other end of the intermediate lever 62 is attached to the side surface 46 a of the first slider 46.
Connect to Then, when the drive rod 58 descends due to the rotation of the cam 59, the drive lever 55 swings to raise the second guide piece 50 (second slider 49), and at the same time, the intermediate lever 62 interlocks with the first guide piece. 47 (first slider 46) is lowered. When the cam 59 continues to rotate, the first guide piece 47 ascends and the second guide piece 50 descends, waiting for the next roller 40 to be received. The mechanism including the cam 59 and the drive rod 58 is an example of a drive unit.

The measuring means M measures the items to be packed such as seeds and grains to be put into the bag b and discharges them into the filling funnel 34. As shown in FIG. 5, a disk stand 71 is erected on a support base 70 arranged on the machine base 1, and a vertical axis 72 is rotatably supported on the stand 71. Reference numeral 73 denotes a speed reducer connected to a sub motor device (not shown) by a belt or the like, and has an output shaft at one clutch piece 74a of the meshing clutch 74.
Is fixed, and the other clutch piece 74b is attached to the lower end of the vertical axis 72. Reference numeral 75 is an air cylinder for connecting the meshing clutch 74 by operating the switching lever 76.

At the upper end portion 72b of the vertical axis 72, a weighing disk 80 is attached to the bottom plate 81, in which a large number of, in this embodiment, ten measuring tubes 82 project downward and are annularly arranged. Reference numeral 83 denotes a shutter that closes or releases the bottom surface of the measuring cylinder 82, and the shutter 83 is rotatably provided on a shaft 84 that is vertically provided on the bottom plate 81. The arm 85 is provided on the side of the disk stand 71 so as to project to the first stopper 8
6 and the second stopper 87 are attached to the shutter 8
The bottom surface of the measuring cylinder 82 is released by bringing the base end portion 83a of No. 3 into contact with the first stopper 86, and the tip end portion 83 thereof is released.
b is brought into contact with the second stopper 87 so that the bottom surface of the measuring cylinder 82 is closed. The first stopper 86 is rotatably provided on the arm 85, and operates an air cylinder (not shown) in response to a bag opening confirmation signal from a vacuum switch or the like provided at the opening station ii to act as a first stopper. The shutter 83 is released by advancing 86.

Numeral 91 is a hopper provided on the gantry 90 for supplying an object to be packaged, and its supply port 92 is provided with a weighing disk 80.
To face. 93 is a screw 94 fitted on the supply port 92.
It is an adjusting member that can be moved up and down and adjusts the supply amount of the packaged object. Reference numeral 95 denotes a spine-cutting member, which is a thin plate piece that comes into contact with the upper surface of the measuring cylinder 82 and removes an extra object to be wrapped, and is fixed to the gantry 90 side. Then, the speed reducer 73 is driven by the auxiliary motor device and the vertical axis 72 is rotated in synchronization with the index shaft 2 via the clutch 74, and at the filling stations iii and iv, the shutter 83 is released to open the back-slitting member. The object to be packaged in the measuring cylinder 82, which is determined by 95, is configured to be discharged into the filling funnel 34.

The operation of such a packaging machine is described in the section of the operation of the present invention and each component, so that the description thereof will be omitted. With this packaging machine, the items to be packaged can be weighed and filled smoothly and quickly, and the packaging capacity can be reduced to about 2%.
It has become possible to achieve an improvement of about twice.

[Brief description of drawings]

FIG. 1 is a plan view showing an outline of a packaging machine.

FIG. 2 is a front view of an essential part showing a part in section.

FIG. 3 is a perspective view showing a main part of a filling unit.

FIG. 4 is a plan view of the same.

FIG. 5 is a front view showing a part of the weighing means in section.

[Explanation of symbols]

b → bag g → grip pair D → intermittent driving means F → filling means M → measuring means 1a → machine frame 2 → index shaft 5 → rotating body 10 → index wheel 13 → follower roller 14
→ Cam shaft 20 → Plate cam 30 → Guide bar 33 → Bracket
34 → filling funnel 38 → drum 39 → guide rail 40 → roller 4
6 → first slider 47 → first guide piece 49 → second slider 50 → second guide piece 71 → disc stand 72 → vertical axis 80 → measuring disc 8
2 → Weighing tube 83 → Shutter 91 → Hopper 95 → Back cut member

Claims (3)

[Claims] 1. A rotating body provided with a large number of grip pairs in a radial direction is intermittently stopped and moved for each of a plurality of stations by an intermittent drive means, and a weighing means is attached to a bag which is supported in a suspended manner by the grip pairs. In a packaging machine in which the object to be packaged measured by the filling means is filled by the filling means, the bag mouth is sealed, and then the bag is discharged, the indexing shaft for fixing the rotating body by the intermittent drive means is a machine frame. Side is rotatably provided, an index wheel having a plurality of two rows of follower rollers arranged annularly is attached to the index shaft, and a cam shaft to which two plate cams are fixed is rotatably provided in the machine frame, The cam surface of the plate cam is provided in contact with the follower roller, and the follower roller is sequentially fed by the plate cam driven and rotated by the main motor device to intermittently rotate the index shaft. A packaging machine characterized by being configured as follows. 2. The weighing means, wherein the upper end of the vertical axis, which is rotatably supported by a disk stand erected on a machine stand, faces a supply port of a hopper for supplying an object to be packaged. A disk is attached to the bottom plate of the weighing disk, and a large number of measuring tubes are provided so as to project downward and are annularly arranged. A back-scissor member that comes into contact with the upper surface of the light-weight tube and eliminates excess packaged objects is provided. A shutter for closing or opening the bottom surface of the cylinder is provided, and the vertical axis is rotated in synchronization with the index shaft by the auxiliary motor device, and the shutter is released by the bag opening confirmation signal at the filling station to release the shutter in the weighing cylinder. The packaging machine according to claim 1, wherein the packaging machine is configured to discharge the package into a filling funnel. 3. With respect to the filling means, a bracket is provided on a guide bar provided on the rotating body so as to be vertically movable,
A filling funnel corresponding to each of the grip pairs is attached to the bracket, a guide rail is provided around the outer surface of a drum provided concentrically with the index shaft, and a roller rotatably provided on the bracket is mounted on the guide rail. A first slider provided with a first guide piece for receiving the roller at a front station of the filling station, and a second guide piece for receiving the roller at a rear station of the filling station. The second
Sliders are provided so as to be movable up and down in the respective drums, and the first slider is lowered by the driving means at the station before the filling station to insert the drop opening of the filling funnel into the packaging bag, and the driving means at the station behind the filling station. 2. The packaging machine according to claim 1, wherein the second slider is raised to cause the drop opening of the filling funnel to escape from the packaging bag.