JPH08282606A - Filling piston device - Google Patents

Abstract

PURPOSE: To reliably prevent a foreign matter from being clamped between an adjusting body and an abutting member, easily and correctly set a travel range of a piston member, and set a delivery amount of liquid to a target amount with high accuracy. CONSTITUTION: A ring body 28 is fixed to an appropriate position of a rod 20 and a collar 30 is mounted thereon. An adjusting body 32 that can position a limit retraction position of the rod 20 by adjusting against the collar 30 when the rod 20 is retracted and adjust a positional relation to a case body 18 by rotating itself is helically engaged with the periphery of a rod-projecting mouths part 18a of the case body 18, thereby setting and adjusting a delivery amount of liquid. A cylindrical cover member 34 covering the rod 20 is provided integrally with the adjusting body 32 so as to extend from the periphery of the adjusting body 32 in the forward direction of the rod 20.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filling piston device for feeding a liquid such as detergent or cosmetics into a container (bottle) by the filling machine for feeding the liquid to the filling machine.

[0002]

2. Description of the Related Art In a filling machine that fills a packaging container (bottle) with a liquid such as cosmetics, soap, detergent, etc., it is required that the filling amount be a target amount (quantity) to eliminate the variation in the filling amount. Has been done. In the filling machine, while the filling nozzle is inserted into the container, the liquid sent from the filling piston device is injected into the container. The filling piston device for sending the liquid toward the filling machine has a cylinder member and a piston member, and retracts the piston member in the cylinder member to suck the liquid from an external tank and further advance the piston member to move the liquid. It sends out toward the said filling nozzle.

[0003]

The piston member is driven by a driving means such as an air cylinder to move it forward and backward, but in order to make the amount of liquid to be sent out (which is the liquid filling amount in the filling machine) a target amount. There is a demand for accurately setting the movement range of the piston member. In response to this request, if the drive means is an air cylinder that moves the rod forward and backward, an abutting member provided by screwing an adjusting nut on the cylinder body and fixed at an appropriate position of the rod is brought into contact with the adjusting nut. To position the retract limit of the rod,
The retreat limit of the piston member can be positioned, and by extension, the liquid delivery amount can be set.

However, when the liquid filling amount is set by the adjusting nut and the abutting member as described above, an external foreign substance is sandwiched between the adjusting nut and the abutting member, and an accurate retreat limit of the rod is not achieved. There is a problem in that the liquid cannot be positioned and the liquid delivery amount changes. Also,
There is a problem that it is difficult to set the delivery amount only with the adjusting nut.

The present invention has been made in view of the above-mentioned demands, and it is possible to reliably prevent foreign matter from being trapped between the adjusting body and the abutting member, and to limit the moving range of the piston member. An object of the present invention is to provide a filling piston device that can be easily and accurately set and that can accurately set the liquid delivery amount to a target amount.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 has a drive unit for moving a rod projecting from a case body backward and forward, and a cylinder unit for letting a liquid in and out. It has a piston part that is fixed to the rod and moves backward and forward in the cylinder part, and the drive part causes the piston part to move backward and forward in the cylinder part to suck and suck liquid from the outside into the cylinder part. In a filling piston device for sending the liquid toward a filling machine, an abutting member is fixed to an appropriate position of the rod, and the abutting member is abutted when the rod is retracted so that the rod is retracted to a limit position. A cylinder for positioning and rotating and adjusting the positional relationship with the case body by screwing the adjustment body to the case body, and covering the rod from the periphery of the adjustment body. Having the configuration of the filling piston and wherein the the cover member that is extended toward the forward direction of the rods and integral with said adjustment member.

[0007]

According to the first aspect of the present invention, when the rod is retracted, the abutment member is brought into contact with the rod to position the retracted limit position of the rod, and the positional relationship between the rod and the adjusting body can be adjusted by rotation. Since it is provided by being screwed into the case body, the position at which the contact member of the adjusting body contacts can be adjusted by rotating the adjusting body, so that the liquid delivery amount can be set and adjusted. In addition, since the tubular cover member that covers the rod extends from the periphery of the adjustment body in the forward direction of the rod, when the contact member and the adjustment body come into contact with each other, a gap between the contact member and the adjustment body is provided. It is possible to reliably prevent foreign matter from getting inside. Therefore, such foreign matter is not caught between the abutting member and the adjusting body, and the retracting limit position of the rod is always constant, so that the liquid delivery amount can be set stably and accurately. Further, since the adjusting body can be integrally rotated by rotating the cover member, the adjusting body can be easily adjusted, and thus the liquid delivery amount can be easily set.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 are explanatory views of a filling piston device according to an embodiment of the present invention, FIGS. 3 and 4 are explanatory views of a filling system provided with the filling piston device of the embodiment, FIG. 5 is an explanatory view of a filling machine, 6 and 7 are operation explanatory views of the filling piston device, and FIG. 8 is an explanatory view of another example of the collar.

As shown in FIGS. 3 and 4, the filling system includes a filling machine 10 for filling a container (packaging container or the like) 8 with a liquid.
And a filling piston device 12 that sends a fixed amount (a set amount) of liquid toward the filling machine 10, and a filling piston device 1
2 has a service tank 14 and a storage tank 16 for supplying a liquid.

As shown in FIGS. 1 and 2, the filling piston device 12 raises and lowers a rod 20 such as a piston rod from a case body 18 such as a cylinder (reverses and moves forward when viewed from the case body 18), for example, air. A drive unit 22 composed of a cylinder or a hydraulic cylinder, and a liquid (reference numeral 2)
3) and a piston part 26 that is fixed to the rod 20 and that moves up and down (backward and forward when viewed from the case body) in the cylinder part 24, The drive unit 22 raises and lowers the piston unit 26 in the cylinder unit 24 to move the cylinder unit 2
4 is sucked in the liquid from the external service tank 14 in an amount to be filled, and the sucked liquid is sent toward the filling machine 10.

In the filling piston device 12, the volume that the piston portion 26 traverses when the piston portion 26 moves between the ascending limit position and the descending limit position within the cylinder portion 24 is the amount that can deliver the liquid, that is, the container. It becomes the filling amount of the liquid to be filled. Further, in order to set the filling amount to the target amount (quantity), the lower limit position of the piston portion 26 is completely lowered and the cylinder portion 2
The bottom end (inner surface side) of No. 4 is set to a constant position, and the ascending limit position of the piston portion 26 (that is, determined by the ascending limit position of the rod 20) can be set as follows.

That is, the ring body 28 is fixed at an appropriate position on the rod 20, and the collar 30 is fixed to the ring body 28.
Place (corresponding to contact member) and lock. This color 3
When the rod 20 is raised, the rod 0 comes into contact with an adjusting body 32, which will be described later, to set the rising limit position of the rod 20 (that is, the liquid filling amount), and the target value of the liquid filling amount into the container 8 is set. A single or a plurality of collars 30 having a corresponding length are prepared. Further, the collar 30 has a substantially cylindrical shape in which the rod 20 is inserted in the center, and is detachable from the rod 20. As shown in FIG. 2, for example, the collar 30 is divided into two or more by inserting a split 30a in the longitudinal direction (divided in a cross section along the axial direction) and fastened to each other with bolts 30b when attached to the rod 20. Can be fastened.

The case body 18 of the drive section 22 has a cylindrical shape, and the opening portion (projection opening) 18 from which the rod 20 projects is formed.
A is formed so as to cover the periphery of the rod 20 and slightly project.
As shown in detail in FIG. 2, a male screw is formed around the mouth portion 18a, and an adjusting body 32 having a female screw formed on the inner circumference is screwed around the mouth portion 18a. are doing. That is, the adjusting body 32 causes the collar 30 to abut when the rod 20 is retracted, so that the rod 2 is moved.
The position of the ascending limit position of 0 is positioned. in this case,
The adjuster 32 can adjust its axial position with respect to the mouth portion 18a by its rotation, whereby the abutment position of the collar 30 can be finely adjusted and the ascending end position of the rod 20 can be finely adjusted. And the color 3
This enables minute setting and adjustment of the liquid delivery amount, which cannot be performed only by replacing 0.

Further, from the periphery of the adjusting body 32, the rod 2
A cylindrical cover member 34 that covers 0 is provided integrally with the adjusting body 32 and extends in the descending direction of the rod 20 (the forward direction when viewed from the case body). Preferably, this cover member 34
Can be integrally molded with the adjusting body 32 with a resin material or a metal material, and is preferably formed separately from the adjusting body 32 and fixed and integrated with the adjusting body 32. it can.

The pipe 36 from the service tank 14 to the filling piston device 12 and the pipe 38 from the filling piston device 12 to the filling machine 10 (for example, 3/4 SUS304 pipe) are respectively provided with a valve element 40 (lower portion). Disc) and disc 4
It is divided by 2 (upper valve body). Each valve body 40, 4
2 has a general mushroom shape having upper umbrella-like portions 40a, 42a (shown in detail in FIG. 6 etc.) and shaft-like portions 40b, 42b extending downward from the portions 40a, 42a in a tubular shape. Each of the shaft-shaped portions 40b and 42b is provided with holes 40c and 42c which are connected to the lower surface portion on the side surface portion. Further, the valve element 40,
A seal portion 44 projecting inward at a position where 42 is positioned,
46 is fixed, and the seal portions 44 and 46 are for mounting the umbrella-shaped portions 40a and 42a of the valve bodies 40 and 42, respectively, and are watertight when they come into close contact with the umbrella-shaped portions 40a and 42a. It will be in a state. The lower valve body 40 opens when the pressure in the pipe line 36 (connected to the service tank 14) becomes higher than the pressure in the cylinder portion 24 at the time of metering (when sucking in the liquid), and the upper valve body 42 at the time of filling. When the pressure in the cylinder portion 24 becomes higher than the pressure in the pipe line 38 (which is connected to the filling nozzle portion 56 described later) at the time of (delivery of the liquid), it opens.

As shown in FIG. 3, the service tank 14 is provided with a level meter 14a, and the pump unit 16a is turned on by a signal output from the level meter 14a.
The N / OFF control is performed, and the shortage of liquid is replenished to the service tank 14 from the storage tank 16 installed outdoors.

As shown in FIG. 5, the filling machine 10 includes a flat lower table 48, a star wheel 50 for intermittently moving the container 8 on the lower table 48, a container guide 52,
It has a drive mechanism 54, a filling nozzle section 56 and a filling head section 58 for filling the moved container 8 with liquid in the filling zone. In addition, in FIG. 5, reference numeral 10 a is a frame of the filling machine 10.

In the case of the embodiment, the lower table 48 has a flat upper surface and a circular outer peripheral shape, and the container 8 is placed on the upper surface of the peripheral portion and slidably moved. is there. Also, the star wheel 50 is
It is a substantially ring-shaped flat plate having an outer peripheral shape substantially similar to that of the lower table 48, and has a filling pocket portion 50a for cutting the container 8 loosely by cutting the outer peripheral portion in accordance with the outer peripheral shape of the container 8. Has and has a star wheel 50
As shown in FIG. 5, two sheets having the same shape in the up-down direction are provided in parallel above the lower table 48 with an interval vertically provided.

The container guide 52 is a star wheel 5.
It is a guide body that is positioned so as to surround 0 and that prevents the container 8 from popping outward when the container 8 is sandwiched between the filling pockets 50a. Further, the filling nozzle portion 56 is for inserting the tip nozzle 56a into the container 8 to fill the liquid sent from the filling piston device 12 into the container 8, and to lower and raise the nozzle 56a. Nozzle cylinder 5 consisting of an air cylinder that opens and closes with
6b. It should be noted that the filling nozzle portion 56 may be a single nozzle or a plurality of nozzles, and in the embodiment, as shown in FIG.
Six filling nozzles 56 and correspondingly six filling piston devices 12 are provided to fill the six containers 8 with liquid at the same time.

Further, the filling head portion 58 has a container 8 which moves on the lower table 48 at the tip of the supporting arm 58a.
The filling nozzle portion 56 is held corresponding to the opening position of the tip nozzle 5 by moving the support arm 58a up and down.
6a can be inserted into and removed from the container 8. Further, the support arm 58a can be horizontally swung, the filling nozzle portion 56 can be moved in synchronization with the movement of the container 8 during filling, and is returned to the original position after filling. .

Next, the setting and operation of the filling amount of the filling piston device 12 of the embodiment will be described with reference to FIGS. 1, 2, 6 and 7. In the filling piston device 12, before operating the filling piston device 12, the collar 30 is selected in advance according to the liquid filling amount into the container 8 and placed and fixed on the ring body 28. Then, the trial operation is performed to measure the liquid (denoted by reference numeral 23) feed amount. Then, based on the measured filling amount, the adjusting body 32 is rotated to move up and down in the axial direction of the rod 20 to adjust the upper limit position of the rod 20 to adjust the liquid feed amount, that is, the liquid filling amount. Set it so that you can see it. Note that the filling piston device 12 can be adjusted so that the liquid filling amount becomes the target amount even during operation.

Further, in the filling piston device 12, since the cover member 34 for covering the rod 20 from the periphery of the adjusting body 32 is provided, the contact surface portion (the lower surface portion in the embodiment) of the adjusting body 32 is covered with the cover member 34. , Color 30 is adjuster 3
It is possible to reliably prevent a foreign substance from entering between the collar 30 and the adjusting body 32 when it comes into contact with 2. Therefore, the delivery amount of the liquid can be set accurately. Further, when the adjusting body 32 is rotated, an operator can integrally rotate the adjusting body 32 by gripping and rotating the cover member 34 with a hand or the like, and the cover member 34 has a cylindrical shape. It is easy to grab because it is, and therefore easy to adjust.

In the filling piston device 12, at the time of measurement for sucking the liquid, as shown in FIG. 6, the rod portion 20 starts to rise from the lower limit position, and the piston portion 26 rises, so that the pressure in the cylinder portion 24 is increased. Lower, pipeline 3
In 6 and 38, the lower valve body 40 and the upper valve body 42 have negative pressures on the cylinder portion 24 side. Therefore, the lower valve body 40 is lifted and opened, and the liquid in the service tank 14 enters the cylinder portion 24 from the inside of the valve body 40 through the hole 40c. Further, at this time, the valve body 42 on the upper side is lowered, and the umbrella-shaped portion 42a is in close contact with the seal portion 46 to close the pipe 38, so that the filling machine 10 (filling nozzle portion 56).
Stop inhaling liquid from. Furthermore, the rod 20
As the pressure rises, the collar 30 comes into contact with (abuts against) the lower surface of the adjusting body 32 and does not rise any further, so that the liquid is no longer sucked in.

Further, at the time of filling for discharging the liquid, as shown in FIG. 7, since the rod 20 descends and the piston portion 26 descends to increase the pressure in the cylinder portion 24, the pipeline 3
6 and 38, the pressure on the cylinder portion 24 side of the valve bodies 40 and 42 becomes high. As the pressure increases, the upper valve body 42 is pushed up, and the liquid is sent from the inside of the valve body 42 to the filling machine 10 (filling nozzle portion 56) through the hole 42c. At this time, the lower valve body 40 is pushed down so that the umbrella-shaped portion 40a comes into close contact with the seal portion 44, and prevents the liquid from flowing back to the service tank 14. Then, when the rod 20 is positioned at the lower limit, the piston portion 26 stops lowering, and the liquid delivery, that is, the filling is completed.

The overall operation of the filling machine system of the embodiment is as follows. (1) The service tank 1 is supplied from the outdoor storage tank 16 to the service tank 14 from the pump unit 16a.
Store the liquid in 4. In the filling machine 10, the star wheel 50 is intermittently operated to intermittently feed the container 8 on the lower table 48. (2) In the filling piston device 12, the piston portion 26 is raised by the operation of the drive portion 22, and the cylinder portion 24
The liquid in the service tank 14 is sucked into the inside.

(3) The filling head portion 58 descends and the tip nozzle 56a of the filling nozzle portion 56 is inserted into the container 8. Further, when the filling head 58 finishes descending, the support arm portion 58 a follows the star wheel 50 and moves in synchronization with the movement of the container 8. (4) The nozzle cylinder 56b operates (down)
The tip nozzle 56a opens. At this time, the piston part 26 of the filling piston device 12 descends to move to the cylinder part 24.
Push out the liquid inside. (5) The extruded liquid passes through the pipe 38 and is filled in the container 8 from the tip nozzle 56a.

(6) When the piston portion 26 completes the lowering operation, the nozzle cylinder 56b is actuated to close the tip nozzle 56a. (7) When the filling head portion 58 rises and the filling nozzle portion 56 separates from the container 8, the filling head portion 58 rotates in the direction opposite to the container moving direction so that the filling nozzle portion 56 moves in the container moving direction. Moves quickly in the opposite direction and returns to its original position (home position). In the meantime, in the filling piston device 12, the piston portion 26 rises to suck the liquid. Then, the above operations (2) to (7) are repeated to continuously fill the container 8 with the liquid. The embodiment has six filling nozzles 56 and repeats filling every six containers 8.

In the above embodiment, the filling machine for sending out the liquid according to the present invention is shown in FIG. 5, but this is only an example and can be applied to other filling machines. Further, the adjusting member is not limited to being directly screwed into the case body, but may be screwed into a bracket or the like fixed to the case body within the scope of the present invention. further,
The drive unit is preferably the air cylinder or the hydraulic cylinder of the embodiment, but is not limited to this, and a drive unit that moves the rod forward and backward by a motor drive can be applied. Further, in the above-described embodiment, as the abutting member, the collar 30 fixed by the bolt 30b is shown in FIG. 2, but the present invention is not limited to this. For example, as shown in FIG. When mounted on 20, the whole can be clamped by one or more snap rings 30B. In this case, the upper and lower ends of the collar 30A are covered with the bowl-shaped body 30C.

[0029]

As described above, according to the present invention, it is possible to reliably prevent foreign matter from being caught between the adjusting member and the contact member, and to set the moving range of the piston member easily and accurately. Therefore, the liquid delivery amount can be accurately set to the target amount.

[Brief description of drawings]

FIG. 1 is an explanatory view of a filling piston device according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a main part of a filling piston device.

FIG. 3 is a side view illustrating a filling system provided with the filling piston device according to the embodiment.

FIG. 4 is a plan view illustrating a filling system.

FIG. 5 is an explanatory diagram of a filling machine.

FIG. 6 is an operation explanatory view of the filling piston device, which is an explanatory view at the time of weighing.

FIG. 7 is an operation explanatory view of the filling piston device, which is an explanatory view at the time of filling.

FIG. 8 is an explanatory diagram of another example of a color.

[Explanation of symbols]

 10 Filling machine 12 Filling piston device 18 Case body 20 Rod 22 Drive part 23 Liquid 24 Cylinder part 26 Piston part 28 Ring body 30, 30A color 32 Adjusting body 34 Cover member 36, 38 Pipe line 40, 42 Valve body 44, 46 Seal Department

Claims (1)

[Claims] 1. A drive unit for moving a rod projecting from a case body to move backward and forward, a cylinder unit for liquid entering and leaving, and a piston unit fixed to the rod and moving backward and forward in the cylinder unit. In the filling piston device for sucking the liquid from the outside into the cylinder part by moving the piston part backward and forward in the cylinder part by the drive part and sending the sucked liquid toward the filling machine, the rod is appropriately adjusted. The contact member is fixed to the position, and when the rod is retracted, the contact member is contacted to position the retracted limit position of the rod, and the positional relationship with the case body is adjustable by rotation. A body is provided by being screwed into the case body, and a cylindrical cover member that covers the rod from the periphery of the adjusting body is integrated with the adjusting body and in the forward direction of the rod. Only by filling piston device, characterized in that the extended.