JPH01279001A - Constant packer - Google Patents

Abstract

PURPOSE:To decrease air inflow into a packing vessel, by transferring forward the contents to be charged by a conveyor while raising them. CONSTITUTION:While contents of a vessel are charged, nozzles 18 are lowered from an upward position P at a starting point of a charging interval to the lowest point Q by the direction for an up-and-down reversible cylinder 19 to move down. At this lowest position the contents start to be charged and transferred upward at a slant according to a forward movement together with a feeder body 17 while charged and further the contents start to rise at the finished point R of charging by the direction for the up-and-down reversible cylinder 19 to move up and transferred backward according to the feeder body 17, rising higher than the uppermost point T. Accordingly, the actual height is returned to the initial upward position P, being nearly kept at a fixed level of the upper most point T. In this way, the lowest point of the filling nozzles in the starting point of charging is arranged near the bottom of the packing vessel and the contents are gradually raised while charged and hence falling impact of the contents is relieved and air inflow to the packing vessel is also decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a quantitative filling device for filling a fixed amount of a filler such as soy milk into a packaging container during the manufacturing process of, for example, filled tofu.

(Prior art and its problems) In general, this type of filling device is installed in a predetermined section on a packaging container conveyor, and furthermore, the filling device is moved back and forth in this predetermined section so that it can be operated in synchronization with the feeding of the conveyor. As a result, a fixed amount of filler is supplied into the packaging container while the filler supply body is also moved during the transportation of the packaging container in the predetermined section.

Conventionally, as shown in Fig. 6, the filling material supply body is moved parallel to the conveyor, and the tip nozzle a is always kept at the same height from the start of filling to the end of filling.
Filler C was poured into the packaging container from step 1. However, at the beginning of filling, the distance between the nozzle a and the surface of the filling C inside the packaging container is large, so the falling impact of the filling C causes a lot of air to be drawn into the container. Seal defects tend to occur, such as incomplete sealing at the sealing part in the subsequent process or deterioration of the subsequent sealing condition, leading to a deterioration in the quality of the packaging.

Furthermore, the seal failure was also caused by dripping from the nozzle a. That is, as shown in Figure 7,
After filling is completed, the filling material C remaining in the nozzle a may drip from the tip of the nozzle a and adhere to the edges of the packaging container during transportation, and as a result, the filling material C remaining in the nozzle a may drip from the tip of the nozzle a and adhere to the edges of the packaging container during transportation. The filler C was caught between the top film d and the container edge, causing a sealing failure.

Therefore, the present invention reduces air entrainment during filling by changing the height of the feeding of the filling material supply body in proportion to the filling amount, and also sucks up the filling material inside the nozzle when filling is completed. By preventing trailing in this manner, sealing defects in the subsequent process are prevented and the above-mentioned problems are solved.

(Means for Solving the Problems) The present invention reduces the mixing of air into the packaging container by gradually raising the filling material supply body simultaneously with the forward movement of the conveyor during filling, and also reduces the amount of air that enters the packaging container. In some cases, the remaining filler inside the nozzle is sucked up to prevent dripping from the nozzle, thereby improving quality by eliminating seal failures in the subsequent process.

That is, the present invention provides a filler supply body that is movable back and forth in a predetermined section on a packaging container conveyance path, and causes the filler supply body to be fed in synchronization with the movement of the packaging container so that the filler supply member is moved forward in the predetermined section. In a fixed quantity filling device for supplying a fixed amount of filling to a vessel, there is provided an advancing/retracting drive means which is driven in synchronization with the container conveyance means and moves the filling supply body back and forth in the predetermined section along the container conveyance path; A guide support member is provided to slidably support the material supply body and guide the filling material supply body in a direction that moves up and down as the filling material supply body moves forward and backward.

In addition, during filling, the filling material supplying body is moved up and down by the nozzle lifting cylinder to move up and down the first lifting body, the lifting rod, the switching valve for filling supply, the second lifting body supporting the filling nozzle, etc. Filling is started by lowering the filling nozzle to a predetermined lower limit position, and after filling is completed, first move back the stopper of the supply switching valve to stop the supply, and then move the stopper further back to stop the filling inside the filling nozzle. It is constructed so that the material is sucked up into the supply switching valve and the filling nozzle is returned to the raised position in this state.

(Function) When the empty packaging containers are sequentially supplied onto the conveyor from the packaging container supply section, arranged at a predetermined pitch, and conveyed to the starting position of a predetermined section, the filling supply body is moved to the nozzle lifting cylinder. is lowered by the first stopper, and the filling nozzle at the tip is positioned at a predetermined lowering limit position, that is, near the bottom of the packaging container. From this position, the filling flows out from the filling nozzle into the packaging container via the supply switching valve, and the filling supply body itself is moved forward as the packaging container is transported, until a certain amount of filling is reached at the final end of the predetermined section. Complete the supply of goods. In this predetermined section, the filling material supply body is guided by the inclined guide member and is moved upward from the lowest position at the start of filling at the rate of the upward change in the surface of the filling material in the packaging container and the distance between the paths, and is fed forward. Ru.

When filling is completed, the nozzle lifting cylinder first moves the first
The plug body is moved back via the lifting body and the lifting rod to stop the supply of filler to the supply switching valve, and the remaining filler in the filling nozzle is supplied by the pumping action caused by the subsequent retreat of the plug body. This prevents dripping from the filling nozzle.

From this state, while the nozzle is further raised, the filler supply body is retreated to its original position along the inclined guide member. In reality, the height of the nozzle remains substantially constant at the highest position and is retracted. As a result, when the filling cycle returns to the zero position where the filling cycle ends, the next empty packaging container corresponds to the position below the nozzle of the filling material supply body, and the same filling cycle is repeated.

(Example) An example of the present invention will be described below with reference to FIGS. 1 to 5.

Figure 1 is a side view of the quantitative filling device on the conveyance line, Figure 2 is a front view cut away at the I-I section in Figure 1, and Figure 3 is the
FIG. 4 is an enlarged cross-sectional view showing one side of the filling material supply body in the figure, FIG. 4 is a diagram showing the positional relationship between the packaging container and the filling nozzle during filling, and FIG. 5 is a cycle showing the displacement of the filling nozzle during the filling cycle. It is a line diagram.

In FIG. 1, reference numeral 1 denotes a conveyor as a means for conveying containers. On the right side of the conveyor 1 in the figure, an empty container supply section (not shown) is provided, and on the left side of the figure, a sealing section (not shown) is provided. It is being The quantitative filling device A of the present invention is provided in a predetermined section (hereinafter referred to as a filling section) located between the empty container supply section and the seal section.

The transport conveyor 1 is a conveyor with a packet that can hold the packaging containers 2, and the conveyor 1 is driven by a drive motor (not shown) to be fed at a predetermined speed in the direction of arrow B in the figure via a sprocket S as a driven wheel. In the case of this embodiment, this conveyor 1 has two parts in the width direction of the conveyor.
The packaging containers 2 are held and sent out two by two at an equal pitch in the conveyance direction.

Arch-shaped support frames 4.5 are fixed on both side frames 3 supporting the conveyor 1 at both end positions of the filling section, and two parallel guide bars as guide support members are provided between the support frames 4.5. 6.6 is provided with its both ends fixed. This guide par 6.6 is provided in an inclined manner in an upward direction as it goes in the conveying direction, that is, in the B direction.

A filler supply body 7 is supported by the pair of guide bars 6.6 so as to be freely slidable in the oblique direction along the par 6.6.

Further, a transmission wheel 8 is provided coaxially with a driven sprocket S around which the conveyor 1 is suspended, and a cam body 9 constituting a driving means for advancing and retracting the supply body 7 is mounted on a shaft 10 at a position facing the transmission wheel 8. A transmission wheel 11 coaxial with the cam body 9 connects the transmission wheel 8 on the sprocket S side and the transmission chain 12'? : Connected through.

For example, an annular cam groove 13 is provided on one side of the cam plate 9.
is formed.

Above this cam body 9, a swinging arm 14 whose intermediate portion is rotatably supported by a bracket 13 protruding from the frame 3 is provided, and a roller 15 provided at the lower end of this swinging arm 14 is connected to the cam body 9. A connecting rod 16 as a connecting member is rotatably connected to the upper end of the swinging arm 14 and the supply body 7 at both ends. ing. That is, the cam body 9 is rotated in synchronization with the feeding of the conveyor 1, and the supply body 7 is pulled or pushed by the cam groove 9a via the swing arm 14 and the connecting rod 16, so that it moves forward and backward in the filling section. give motion. During this forward and backward movement, the supply body 7 is guided by the guide bar 6.6 in an inclined direction with displacement also in the vertical direction.

Next, in FIG. 3, the supply body 7 is connected to the supply body 17
It has two left and right filling nozzles 18 and 18 that are moved up and down with respect to this main body 17 and supply filling into the two left and right containers 2 on the conveyor 1, respectively. The main body 17 is provided with a cylinder 19 for raising and lowering the nozzle in the vertical direction, and is also integrally provided with inclined guide cylinders 20.20 which are slidably fitted into the guide bars 6.6. The main body 17 is supported by this guide cylinder 20.20 so as to be freely slidable in an oblique direction along the guide bar 6.6. Since the filler supply structure for each nozzle 18, 18 is the same on both the left and right sides, only one side will be described below.

The main body 17 is provided with a vertical lifting rod guide bearing 21, and a first stopper 22 that determines the nozzle lowering limit position downward from the bottom surface of the main body 17.
is integrally protruded.

The lower end of this first stopper 22 is L-shaped and forms a locking surface portion 22a facing upward.

The screw rod 19 of the nozzle lifting cylinder 19
A horizontal first elevating body 28 is integrally connected to a, and two elevating rods 24 (only one of which is shown in FIG. 3) are installed on both sides of the first elevating body 23. The upper part of each lifting rod 24 is connected to the rod guide bearing 21 of the main body 17.
The engagement shoulder part 25 is slidably inserted in the vertical direction, and an engagement shoulder part 25 facing upward is formed at the lower part, and a tapered surface part 26 is formed on one side below the engagement shoulder part 25.゛Also, a second elevating body 27, which is located between the first elevating body 28 and the engaging shoulder portion 25 of the elevating rod 24 and is slidably inserted into the elevating rod 24, is connected to the first elevating member 23. It is supported horizontally below.

A second stopper 29 is integrally attached to the upper surface of the second elevating body 27, which has a spring storage portion 28 and determines the lowering limit of the first elevating body 23. Both ends of the first spring 30 are locked between the spring storage portion 28 and the lower surface of the first elevating body 23, and the first spring 30 causes the lower surface of the second elevating rest 27 to be connected to the elevating rod 2.
It is always biased in the direction of being in pressure contact with the engaging shoulder portion 25 of No. 4. That is, the second elevating body 27 can move up and down together with the elevating rod 24, and is separated from the engaging shoulder portion 25 of the elevating rod 24 when the spring 30 is bent. Further, an engaging member 44 is integrally provided on the upper surface of the second elevating body 27, and an engaging member 44 is provided at the upper end of the engaging member 44.
a is provided and faces the engagement surface 22a of the first stopper 22 of the main body 17 so as to be engageable from above.

A casing 32 forming a filler supply switching valve 31 with open inner end faces is integrally fixed to both sides of the second elevating body 27, and the plug of the switching valve 31 is opened from the inside of the casing 32. 33 is loosely fitted so as to be slidable in the horizontal direction. A filler outlet 35 is opened at one end of the supply chamber 34 formed by the casing 82 and the end face of the stopper 83, and a filler inlet 36 is opened at one side wall of the casing 32. has been done.

This inlet 86 is connected to a filling pipe 37 for pressure feeding, which is connected to a filling supply hopper 38 via a filling cylinder 39 and a flow rate adjustment valve 40, as shown in FIG. The flow rate is adjusted and the filling material is fed under pressure to the switching valve 31.

The outlet 35 has a tip end connected to the packaging container 2 on the conveyor 1.
The above-mentioned filling nozzle 18, which is an extended pipe, is attached so as to be inserted therein.

A communication passage 41 is formed in the outer circumference of the stopper 33 so that the inflow port 36 and the inside of the supply chamber 34 communicate with each other only when the stopper 33 is in its forward movement limit position.

Furthermore, a tapered surface 42 having the same tapered shape and facing the tapered surface portion 26 of the lifting rod 24 is integrally formed at the other end of the plug body 33 extending outside from the casing 32 .

Further, both ends of a second spring 48 are locked between the plug body 33 and the end surface of the casing 82, and the taper surface 42 of the second spring 48 biases the plug body 33 in a direction that always presses it against the tapered surface portion 26 of the lifting rod 24. ing.

With such a configuration, the operation at the time of filling will be explained step by step.

First, the supply body 17 is located at the starting end of the filling section as shown in FIG. 1, the lifting cylinder 19 is at its retreat limit, and the height of the filling nozzle 18 is at its highest position as shown in FIG. When the packaging container 2 is conveyed by the conveyor 1 to a position below the filling nozzle 18 in this state, a descending command is sent to the nozzle lifting cylinder 19 via a well-known container detection means.

The first elevating member 23, the elevating rod 24, and the second elevating body 27 are moved downward together via the piston rod 19a, and the filling nozzle 18 enters the packaging container 2.

When the engagement member 44 of the second elevating body 27 comes into contact with the first stopper 22 of the main body 17, the descent of the second elevating body 27 is stopped at a predetermined height set as the lowering limit position of the filling nozzle 18. Ru. At this time, the tip of the filling nozzle 18 is positioned near the bottom of the packaging container 2. Thereafter, while the first spring 29 is bent, the first elevating body 23 and the elevating rod 24 further descend until the lower surface of the first elevating body 23 comes into contact with the second stopper 29 of the second elevating body 27. 23 and the lifting rod 24 are lowered.

As the elevating rod 24 descends, the taper surface 26 at the tip of the rod engages with the tapered surface 42 of the plug 38 in a wedge manner, and the plug 33 is advanced leftward from the state shown in FIG. The stopper 33 is stopped at its forward movement limit position as indicated by the two-dot chain line in FIG.

At this forward limit position, the communication passage 41 of the stopper 33 and the inlet 36 of the casing 32 are communicated with each other, and the filling material is sent from the supply hopper 38 to the supply chamber 34 in the switching valve 31 through the pressure-feeding pipe 87. Thereby, filling into the packaging container 2 is started.

As the conveyor 1 moves, the cam body 9 is rotated by the rotational force transmitted from the sprocket S, and the supply body 7 is conveyed on the conveyor 1 via the swing arm 14 and the connecting rod 16 under the control of the cam groove 9a. Move forward in the same direction as the direction. Along with this forward movement, the supply body 7 moves to the guide par 6.6.
In other words, as shown in FIG. The filling is supplied into the packaging container 2 while keeping the distance between the surface of the filling and the tip of the nozzle 18 as close as possible to a constant distance, and filling of a certain amount is completed at the end of the filling section. When filling is completed, a lifting command is sent to the nozzle lifting cylinder 19.

When the piston rod 19a starts to rise, it first moves up and down with the first lifting body 23 within the range of the return force of the first spring 30 while holding the second lifting body 27 at the lower limit position where it contacts the first stopper 22. Only the rod 24 is quickly raised. As a result, as soon as the plug 33 is slightly retracted by the second spring 43 through the wedge engagement between the tapered surface portion 26 and the tapered surface 42, the communicating path 41 of the plug 33 is shifted from the inlet 36 and the inlet is opened. 36 is closed. Therefore, the supply of the filler to the switching valve 31 is stopped, and the supply of the filler into the packaging container 2 is completely stopped. Continuing plug body 33
Due to the retraction of the filling material remaining in the nozzle 18, the filling material remaining in the nozzle 18 is returned to the supply chamber 34 by a pumping action, or is balanced in the direction of being sucked up, thereby preventing dripping from the nozzle 18.

When the engagement shoulder 25 of the lifting rod 24 engages with the lower surface of the second lifting stop 27, the stopper 33 remains in the retracted position as shown by the solid line in FIG. The second lifting suspension 27 is also raised together.

Further, the second lift 27 continues to rise, but at the same time, the supply body 7 is moved backward via the swing arm 14 and the connecting rod 16 under cam control by the cam body 9, and returns to the first filling section starting position. , - End the filling cycle.

As shown in FIG. 5, the movement of the nozzle 18 during this filling section is lowered from the rising position A at the beginning of the first filling section to the lowering limit position A by the descending command of the lifting cylinder 19, and from this position the nozzle 18 is filled. At the time of filling, the supply body main body 1
It is moved in the inclination direction so as to rise as it moves forward together with the supply body 7, and at the end of filling, it starts to rise by a command to raise the lifting cylinder 19, and it follows the supply body 17 while being further raised from the highest position. Since it is moved backwards, the actual height is kept approximately constant at the highest position while returning to the initial position A.

(Modification) Note that the connecting member used for the forward/backward driving means for the filling supply body 7 is not limited to the connecting rod 16 as in the embodiment, but may also be a lobe, a wire, etc.
The supply body 7 is moved in the forward direction by a tensile force linked to the
It is also possible to make the return using the own weight of the supply body 7.

In addition, the tapered surface portion 26 of the lifting rod 24 and the switching valve 3
The sliding structure with the plug body 33 of No. 1 is not limited to the wedge engagement between the tapered surfaces as in the embodiment, but various methods such as providing a rolling wheel or the like that is transferred to the tapered surface portion 26 on the plug body 33 side can be used. It is also possible to use

(Effects of the Invention) As described above, in the filling section, the filling supply body is fed forward while being raised at the ratio of the rise of the surface of the filling inside the packaging container and the distance between the paths during filling, so that filling can be started. By setting the lowering limit of the filling nozzle near the bottom of the packaging container and gradually raising it as filling occurs, the nozzle tip is brought as close as possible to the filling surface from the start of filling to the end of filling. Since the filling can be supplied in the same state, the impact of falling the filling is reduced, making it easier to package.

Air entrainment into the container is reduced. Therefore, quality is improved, and sealing defects at the sealing portion in the subsequent process due to air intrusion can be prevented.

Furthermore, since the filling supply body is configured to move the plug body i of the switching valve for supplying filling to the filling nozzle to the cylinder for lifting and lowering the nozzle, the inflow port to the switching valve is opened by lowering the nozzle, and filling is performed. At the same time, at the end of filling, the inlet to the switching valve is first closed by the nozzle raise command, and then the filling remaining in the nozzle is quickly sucked up by the pump action, so that when filling is completed, the dripping from the 7' nozzle is eliminated. This prevents the filling from adhering to the edges of the packaging container during transport of the next container, improves the sealing effect at the sealing part in the subsequent process, and prevents seal failures. can do. Moreover, since the vertical movement of the nozzle, the supply operation, and the suction operation at the end of filling are all mechanically linked, the operation timing can always be accurate and reliable.

[Brief explanation of the drawing]

Figure 1 is a side view of the quantitative filling device on the conveyance line, Figure 2 is a front view cut away at the 1-1 section in Figure 1, and Figure 3 is the
FIG. 4 is a diagram showing the positional relationship between the packaging container and the filling nozzle during filling, and FIG. 5 is a cycle diagram showing the displacement of the nozzle during filling. , FIG. 6 is a diagram showing the positional relationship between the packaging container and the filling nozzle during filling in the conventional device, and FIG. 7 is a diagram showing the conventional hanging state. 1...Transportation conveyor as container transportation means, 2...
Packaging container, 6... Guide bar as a guide support member, 7
. . . Filler supply body, 9 . . . Cam body constituting the driving means for advancing and retracting, 14 . . Swinging arm configuring the driving means for advancing and retracting, 16 .
... Supply body body, 18... Filling nozzle, 19... Nozzle lifting cylinder, 19a... Piston rod, 2
2... First stopper, 23... First elevating body, 24
... Elevating rod, 25... Engaging shoulder portion, 26... Tapered surface portion, 27... Second elevating body, 29... Second stopper, 30... First spring, 31...・Filling material supply switching valve, 32...Casing, 33...
Plug body, 34... Supply chamber, 35... Filling outlet, 8
6... Filling flow inlet, 37... Piping for pressure feeding the filling,
41...Communication path, 43...Second spring, A...
・Quantitative filling device, S... sprocket. Patent applicant: N.T. Sankiyo Co., Ltd.
Patent Attorney Kunio Nakagawa 1st
Figure 2

Claims (5)

[Claims] (1) A filler supply body is provided so as to be able to reciprocate in a predetermined section on the packaging container conveyance path, and the filler supply body is fed in synchronization with the movement of the packaging container so that a fixed amount of material is delivered into the packaging container as it moves forward in the predetermined section. In the quantitative filling device for supplying a filling material, the filling device includes an advancing/retreating drive means that is driven in synchronization with the container conveyance means and moves the filling material supply body forward and backward along the container conveyance path in the predetermined section; 1. A quantitative filling device comprising: a guiding support member that slidably supports the filler supply member and guides the filler supply member in a direction that moves up and down as the filler supply member moves forward and backward. (2) The advancing/retracting driving means includes a cam body that is rotated in connection with a driven wheel of the container conveying means, and a swinging arm that engages with the cam body and swings by the rotation of the cam body. 2. The quantitative filling device according to claim 1, further comprising a connecting member that connects the swing arm and the filling material supply body. (3) The quantitative filling device according to claim 1 or 2, wherein the guide support member is comprised of a guide bar that is inclined in a direction that rises as it goes forward along the container conveyance path. (4) A supply body, a nozzle elevating cylinder provided on the supply body, a first elevating body connected to the piston rod of this elevating cylinder and moved up and down, and integrated with this first elevating body. an elevating rod that is attached and has an upwardly facing engagement shoulder on a lower portion thereof and further has a tapered surface portion on one side of the lower end, and slides on the elevating rod between the first elevating body and the engaging shoulder; A second elevating body that is freely inserted and inserted, and a direction in which both ends are locked between the second elevating body and the first elevating body and the second elevating body is always pressed against the engagement shoulder of the elevating rod. a first spring for biasing; a casing integrally provided with the second elevating body and having a filler flow inlet and a filler flow outlet open; a filler supply switching valve comprising a stopper whose one end is slid on the tapered surface of the lifting rod and forms a communication passage that communicates the inflow port with the supply chamber in the casing at the forward end position; and an end face of the casing. and a second spring that is fixed at both ends between the spring and the stopper and always biases the stopper in a direction to press the stopper against the tapered surface of the lifting rod, and a filling spring that is connected to the inlet and that sends filling to the switching valve. A material pressure feeding device, a filling nozzle attached to the outlet and whose tip corresponds to the filling position, and a filling nozzle provided on the supply body and engaged at a predetermined position when the second elevating body is lowered to set the lowering limit position of the nozzle. A first stopper is provided on the second elevating body and is engaged at a predetermined position when the first elevating body is lowered relative to the second elevating body, and determines the lowering limit position of the elevating rod, that is, the forward limit position of the stopper. When the nozzle lifting cylinder starts the descending operation, the second elevating body is lowered until it touches the first stopper, and from this position the elevating rod tapers until the first elevating body abuts the second stopper. The plug body is moved forward through sliding contact with the surface part, and at this position, the inflow port and the communication path of the plug body are communicated with each other, and the filling material is sent to the filling nozzle through the switching valve and filling is started. When the cylinder starts to move backward, the first elevating body is first raised to move the stopper back to close the inlet, and the stopper is further moved back to suck up the filling in the filling nozzle into the switching valve. The filling supply body is characterized in that the second elevating body is also raised in this state to return the filling nozzle to the raised position. (5) The quantitative filling apparatus according to any one of claims 1 to 3, using the filling material supplying body according to claim 4.