JP3584975B2 - Preform cleaning method and apparatus - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a preform cleaning method and apparatus for cleaning a preform that is a primary molded product before being commercialized as a plastic bottle or the like.
[0002]
[Prior art]
In the production of plastic bottles, a method of molding a preform as shown in FIG. 1 as a primary molded article and blow molding (secondarily molding) the same into a plastic bottle is generally widely used. In this case, the place where the preform is first molded and the place where the preform is formed into a plastic bottle are often separate. There are also bottle manufacturers that mold.
[0003]
The preform itself is treated as a product, and is subjected to various processes such as manufacturing, inspection, packing, distribution, unpacking, and the like, and is then subjected to secondary molding. The secondary molding as a plastic bottle with the adhered and the like is a serious quality defect for the bottle maker.
[0004]
Therefore, it is necessary to clean the preform in a pre-process of performing the secondary molding (blow molding) of the preform as a plastic bottle, but since the plastic bottle is blow-molded by a mass production method, the preform is blown. It is also required to efficiently clean a large amount of preforms in a flow operation for cleaning the reforms. However, a preform cleaning device that can meet such a demand has not been provided so far.
[0005]
[Problems to be solved by the invention]
A first object of the present invention is to provide a preform cleaning method and apparatus capable of efficiently and neatly cleaning an inner surface and an outer surface including a mouth portion of a large amount of preforms by a flow operation.
[0006]
A second object of the present invention is to provide a preform cleaning apparatus in which the operation of each part is stable and the whole can be downsized.
[0007]
[Means for Solving the Problems]
In the preform cleaning method according to the first embodiment of the present invention, a plurality of inner surface cleaning nozzles are synchronized with the preform being conveyed in the inverted posture with the opening facing downward in a predetermined posture. The preform inner surface cleaning is sequentially started by sequentially moving up and down while feeding while maintaining the interval, and sequentially injecting into the preform while jetting air before entering the preform when sequentially raising the inner surface cleaning nozzle. During the interval from the lowering of the inner surface cleaning nozzle to the successive removal of the preform from the preform, the inner surface of each preform is sequentially cleaned, and the interval between the inner surface cleaning nozzle and the preform conveying direction is set to be equal. Air is sprayed out of the preform from a plurality of nozzles for cleaning the outer surface located at the position, and the outer surface of the preform is cleaned by the nozzle for cleaning the inner surface. Wherein the cleaning by simultaneously during cleaning section of the inner surface by Le.
[0008]
Before the inner surface is cleaned by the inner surface cleaning nozzle and the outer surface is cleaned by the outer surface cleaning nozzle, the preform may be neutralized by a neutralization unit.
[0009]
In the preform cleaning method according to the second embodiment of the present invention, while the preform is sequentially conveyed in an inverted posture with the opening facing downward, air is ejected together with ions from an outer surface cleaning nozzle outside the preform to remove the charge from the preform. Cleaning the outer surface while cleaning the outer surface, and cleaning the inner surface of the preform by jetting air from the inner surface cleaning nozzle while moving the nozzle for cleaning the inner surface into the preform and moving it simultaneously with the preform. Is performed concurrently.
[0010]
Also in this case, it is preferable that the air injection from the inner surface cleaning nozzle is started before the preform enters and is performed until the preform is extracted.
[0011]
More preferably, the plurality of nozzles for cleaning the inner surface are sequentially moved up and down while being rotated while maintaining a predetermined interval in synchronization with the conveyance of the preform. Cleaning of the inner surface of the preform is sequentially started by sequentially rushing into the preform while spraying, and during the interval from lowering the inner surface cleaning nozzle sequentially to sequentially withdrawing from the preform, sequentially for each preform. In addition to cleaning the inner surface, a plurality of nozzles for cleaning the outer surface, which are arranged at regular intervals with the nozzles for cleaning the inner surface in the transport direction of the preform, eject air along with ions to the outside of the preform along with the ions to discharge the outer surface of the preform. Is simultaneously removed and cleaned only during the cleaning section of the inner surface by the inner surface cleaning nozzle.
[0012]
The preform cleaning apparatus according to the first embodiment of the present invention is characterized by a combination of the following means.
(1) A gripping member for gripping the conveyed preform, a preform reversing mechanism for rotating the gripping member to invert the posture of the preform, and a preform in which the mouth is turned down and turned down. And a nozzle plunging mechanism for plunging an inner surface cleaning nozzle, and multiple units thereof are mounted at equal intervals in a circumferential direction of the revolving frame.
{Circle around (2)} The outer surface cleaning nozzle that sprays air to the outer surface of the preform is installed at a fixed position above a position where the inner surface cleaning nozzle protrudes into the preform;
(3) An air supply system that supplies air to the inner surface cleaning nozzle and the outer surface cleaning nozzle is provided. The solenoid valve of this air supply system is configured such that air jetting from the inner surface cleaning nozzle is performed by the preform. Before and after it is ejected from the preform, and on / off control is performed so that air injection from the outer surface cleaning nozzle is also performed at the same time.
[0013]
Further, the revolving frame is revolved and driven by the driving device with respect to the fixed frame, and the gripping member, the preform reversing mechanism, and the nozzle plunging mechanism are formed as one set, and a number of the units are arranged in the circumferential direction of the revolving frame. If they are installed at intervals, a large number of preforms can be continuously and efficiently cleaned.
[0014]
The preform cleaning apparatus according to the second embodiment of the present invention is characterized by a combination of the following means.
{Circle around (1)} The swivel frame is swiveled by a driving device with respect to a fixed frame provided with undulating first and second cam tracks along the body.
{Circle around (2)} A gripping member for gripping the conveyed preforms one by one, a preform inverting mechanism for rotating the gripping member to invert the posture of the preform upside down, and the mouth is turned upside down and turned downward. A plurality of units are installed at equal intervals in the circumferential direction of the revolving frame as a set of a nozzle entry mechanism for inserting the inner surface cleaning nozzle into the preform.
{Circle around (3)} The preform reversing mechanism is configured such that the cam follower mounted on the rack rolls along the first cam track as the revolving frame rotates, whereby the rack moves up and down in accordance with the up-and-down movement of the first cam track. A structure in which the gripping member is turned around the axis of the pinion by rotating the pinion meshed with the rack.
{Circle over (4)} The nozzle plunging mechanism mounts a cam follower on the elevating rod holding the nozzle for cleaning the inner surface, and the cam follower rolls along the second cam track with the turning of the turning frame, so that the elevating rod is moved to the The structure is such that the inner surface cleaning nozzle moves up and down in accordance with the up-and-down movement of the cam track, and the inner surface cleaning nozzle enters and exits the preform.
(5) A plurality of outer surface cleaning nozzles that spray air to the outer surface of the preform are installed at a fixed position above a position where the inner surface cleaning nozzle protrudes into the preform, at the same interval as the distance between the inner surface cleaning nozzles. That you did.
(6) The solenoid valve for each unit for individually supplying air to the nozzle for cleaning the inner surface of each unit, and the internal piping system and the internal electrical wiring system from the solenoid valve to the nozzle for cleaning the inner surface are mounted inside the revolving frame. It was installed in.
{Circle around (7)} A rotating joint that rotates integrally with the rotating frame and a fixed joint that does not rotate are fitted on the rotating axis of the rotating frame, and the solenoid valve is connected to the external piping and the internal electric wiring system is connected to the external electric at the fitting portion. Connected to wiring.
[0015]
As a gripping member, a pair of gripping claws are normally urged in a closing direction by a spring, and a cam follower attached to the gripping member engages with an opening / closing cam provided on a fixed frame side as the turning frame rotates. By doing so, it is preferable that the pair of gripping claws open in conjunction with the cam follower.
[0016]
In order to further reduce the size, it is more preferable that the fixed frame and the revolving frame are cylindrical, the preform reversing mechanism is mounted outside the revolving frame, and the nozzle plunging mechanism is mounted inside the revolving frame.
[0017]
In order to enhance the cleaning effect, it is preferable to provide a static eliminator for neutralizing the preform before the cleaning by the inner surface cleaning nozzle and the outer surface cleaning nozzle is completed.
[0018]
The preform cleaning apparatus according to the third embodiment of the present invention is characterized by a combination of the following means.
(1) A gripping member for gripping the conveyed preform, a preform reversing mechanism for rotating the gripping member to invert the posture of the preform, and a preform in which the mouth is turned down and turned down. And a nozzle plunging mechanism for plunging an inner surface cleaning nozzle, and a number of the units are mounted at equal intervals in a circumferential direction of the revolving frame.
{Circle around (2)} The outer surface cleaning nozzle that sprays air onto the outer surface of the preform is installed at a fixed position above the position where the inner surface cleaning nozzle protrudes into the preform.
{Circle around (3)} An air supply system for supplying air to the inner surface cleaning nozzle and the outer surface cleaning nozzle, and a static eliminator for neutralizing the preform before the cleaning of these nozzles by air jetting is completed.
[0019]
In the preform cleaning apparatuses of the second and third embodiments, as the static elimination means, one that injects ions along with the air injection by the outer surface cleaning nozzle to eliminate the static electricity of the preform is formed by static elimination while blowing air and air injection. Cleaning can be performed simultaneously from the same nozzle, and there is no need to separately install a static eliminator. This is convenient, but the static elimination may be performed by blowing air before the preform is gripped by the gripping means.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings.
[0021]
FIG. 2 is a plan view showing the entire system of the preform cleaning apparatus according to the present invention. The system is installed in a dedicated cleaning room 1. FIG. 3 shows the vicinity of the outside of the entrance 2 of the cleaning room 1. The preforms 3 to be cleaned are carried in a line in an upright position with their necks positioned between two parallel rails 4 and are carried in. At the time of carry-in, a blower-type static eliminator 5 is installed to neutralize the preform 3 outside the cleaning room 1. This blower type static eliminator 5 has a discharge electrode arranged at an outlet of a fan rotated by a motor, and generates positive and negative ions by generating corona discharge at the discharge electrode while blowing with a fan. The preform 3 is sprayed together with the wind to eliminate static electricity.
[0022]
Instead of the static elimination method as shown in FIG. 3, a multi-blast type static eliminator 5 'in which a plurality of ventilation type static eliminators 5a are arranged at equal intervals as shown in FIG. If the positive and negative ions are blown from above onto the preform 3 together with the wind toward the preform 3 conveyed side by side, the inner and outer surfaces of the preform 3 can be simultaneously discharged.
[0023]
The preform 3 from which the charge has been removed is linearly conveyed between the two rails 4, and is captured by the carry-in star wheel 6a rotating in the direction of arrow A in the cleaning room 1 as shown in FIG. By being arranged and held at equal intervals in the circumferential direction, the preform cleaning device 7 is sequentially fed to the gripping position.
[0024]
FIG. 4 shows the appearance of the preform cleaning device 7, and FIG. The preform cleaning device 7 has a structure in which an upper cylindrical revolving frame 9 revolves around a vertical fixed shaft 10 with respect to a lower cylindrical fixed frame 8. Around the fixed shaft 10, a plurality of upper and lower bearings that support the turning frame 9 and its accompanying parts are provided. The turning frame 9 is connected to a sprocket wheel 11 that rotates around a fixed shaft 10 below the fixed frame 8. The turning frame 9 is driven by a motor (not shown) through a timing belt 12 wrapped around the sprocket wheel 11. Is done. In FIG. 2, the arrow B indicates the turning direction of the turning frame 9, and the turning and the rotation of the carry-in side star wheel 6a are synchronized.
[0025]
The revolving frame 9 includes a gripping member 13 for gripping the preforms 3 one by one, a preform reversing mechanism 14 for rotating the gripping member 13 to vertically invert the posture of the preform 3, And a nozzle insertion mechanism 16 that inserts the inner surface cleaning nozzle 15 into the preform 3 with the unit facing downward, as a set of units. ing. FIG. 11 shows the set of units.
[0026]
As shown in FIGS. 7 to 10, the gripping member 13 has a pair of gripping claws 18 pivotally attached to the body 17 so as to be horizontally rotatable (openable and closable) around a fixing pin 19, respectively, and has two sliders 20. The guide rod 21 is mounted so as to be slidable back and forth (movable forward and backward). Then, the intermediate portion of the pair of gripping claws 18 is connected to the distal end of the slider 20 by a pair of links 22 and connecting pins 23 and 24, respectively, so that the pair of gripping claws 18 is opened and closed by the advance and retreat of the slider 20. Has become. A cam follower 25 is rotatably supported on the slider 20, and the cam follower 25 is provided in the fixed frame 8 along with the turning of the turning frame 9, as shown in FIG. 6 (plan view). When the slider 20 rolls while engaging with the inner peripheral edge of the opening / closing cam 26, the slider 20 retreats against the pair of springs 27 as shown in FIG. 9, and the pair of gripping claws 18 are opened. . The cam 26 forms an arc extending from the position X1 to the position X2 in FIG. 2, and the pair of gripping claws 18 are opened immediately after passing the X1 with the turning of the turning frame 9 in the direction of the arrow B. Is held by the cam 26 immediately before X2, and is closed by the action of the spring 27 between X2 and X1.
[0027]
The preform 3 sent by the carry-in side star wheel 6a as described above has its neck portion between the pair of gripping claws 18 which are open. In order to prevent the preform 3 from swinging on the turning frame 9 side, an auxiliary star wheel 28 is integrally provided on the outer periphery of the turning frame 9 as shown in FIGS. The preform 3 whose neck has entered between the pair of gripping claws 18 is fed in the arrow direction B with the turning of the revolving frame 9, and is gripped by the pair of gripping claws 18 closing at the X2 position in FIG. .
[0028]
The gripping member 13 gripping the preform 3 by closing the pair of gripping claws 18 is turned upside down by the preform reversing mechanism 14 during the turning of the turning frame 9 from the X2 position to the X3 position. Next, the preform reversing mechanism 14 will be described. FIG. 11 shows a side view thereof.
[0029]
The holding member 13 is fixed to a shaft of the pinion 29 by a bracket 30. The pinion 30 is supported by a bearing base 31 fixed to the turning frame 9 and meshes with a vertical rack 32 slidably mounted on the turning frame 9 up and down. An elevating plate 34 that supports a cam follower 33 is fixed to the lower end of the rack 32. The cam follower 33 rolls while fitted on a first cam track 35 which is a groove provided on the body of the fixed frame 8 so as to be undulated. The pinion 29 is rotated by moving up and down according to the undulation of the first cam track 35. As a result, the gripping member 13 rotates around the axis of the pinion 29 and turns upside down, and the preform 3 gripped by the gripping member 13 is in an inverted posture with its opening facing downward. 12 to 17 sequentially show the inversion operation.
[0030]
When the preform 3 is in the inverted posture as shown in FIG. 17, the nozzle 15 for cleaning the inner surface enters the preform 3 by the nozzle plunging mechanism 16 as the revolving frame 9 turns, and then the nozzle plunging mechanism. 16 will be described. FIG. 18 shows the cross section.
[0031]
The nozzle 15 is fixed to an upper end of a vertical lifting rod 36 and moves up and down integrally with the lifting rod 36. The elevating rod 36 is vertically slidably penetrated by upper and lower guide bearings 37 and 38 fixed to the revolving frame 9, and a second cam follower 39 mounted on the elevating rod 36 is provided inside the revolving frame 9. By rolling on the cam track 40, the lifting rod 36 moves up and down according to the undulation of the second cam track 40. FIG. 19 shows the operation in an expanded manner. The air injection is started before the nozzle 15 enters the preform 3, and the inside of the preform 3 is cleaned by entering the preform 3 while injecting air upward, so that the air is supplied to the nozzle 15. The shutoff is controlled by a solenoid valve of an air supply system in synchronization with the elevation of the nozzle 15 as described later.
[0032]
At the same time as cleaning the inner surface by air jetting, the outer surface of the preform 3 is cleaned by air jetting at a fixed position from above, so that the plurality of outer surface cleaning nozzles 41 are arranged at the same interval as the interval between the inner surface cleaning nozzles 15. At the installation frame (not shown). As shown in FIG. 19, in this example, the outer surface is cleaned simultaneously with the inner surface cleaning within a range from immediately before the inner surface cleaning nozzle 15 enters the preform 3 to immediately after the nozzle is removed. The number of the cleaning nozzles 41 is eight, and these outer cleaning nozzles 41 simultaneously spray air downward, and simultaneously control the supply and cutoff of air to the inner surface cleaning nozzles 15 by a solenoid valve of an air supply system. Is done.
[0033]
FIG. 19 is a timing chart from when the inner surface cleaning nozzle 15 enters the preform 3 to when it is removed, and from when the inner surface cleaning nozzle 15 and the outer surface cleaning nozzle 41 start air injection to when they stop. And the timing chart of FIG. As can be seen from these timing charts, the air injection from the inner surface cleaning nozzle 15 and the outer surface cleaning nozzle 41 starts before the inner surface cleaning nozzle 15 starts rising and enters the preform 3 and then enters. During this period, the internal cleaning nozzle 15 descends and comes out of the preform 3 and stops when it is pulled out. By starting the air injection from the inner surface cleaning nozzle 15 before entering the preform 3 in this manner, the inner and outer surfaces of the mouth of the preform 3 in the inverted posture are also cleaned by the inner surface cleaning nozzle 15. There is an effect that it can be cleaned. Further, since the stop of the air injection from the inner surface cleaning nozzle 15 is performed after the preform 3 is pulled out, the same can be said in this case.
[0034]
Since the timing as described above can be determined from the rotation speed of the turning frame 9 and the trajectory of the second cam track 40, if the rotation speed of the turning frame 9 is detected, it can be electrically and automatically controlled. The timing may be determined by detecting the elevation of the nozzle 15 itself.
[0035]
The preform 3 having the inner surface and the outer surface cleaned at the same time, the rack 32 descends from the position X4 to the position X1 in FIG. 2 and the gripping member 13 is reversed in the opposite direction to the above to return. Returned to standing position. When the pair of gripping claws 18 of the gripping member 13 are opened after passing the X1 position, the gripping members 18 are caught by the discharge-side star wheel 6b rotating in the direction of arrow C, and are further cleaned from the star wheel 6b by the discharge conveyor. It is carried out of the room 1.
[0036]
Next, an internal piping system for supplying air to the group of inner surface cleaning nozzles 15 and an internal electric wiring system for supplying power to a group of solenoid valves for controlling the same will be described.
The inner surface cleaning nozzles 15 are arranged around the entire circumference of the revolving frame 9 and revolve integrally with the revolving frame 9 as described above, so that air supply and power supply are performed as follows. Via a joint attached to the upper end of the. FIG. 20 shows the joint structure. In FIG. 20, fixed portions that do not rotate are indicated by hatching.
[0037]
As shown in FIG. 20, a rotary joint 43 is fixed on a circular rotary plate 42 that rotates integrally with the revolving frame 9, and two sets of solenoid valve units 44 and two sets of power distribution units 45 are provided in FIG. And are mounted on the rotary plate 42 by brackets 46 and 47, respectively. The rotating plate 42 is rotatably supported on the upper end of the fixed shaft 10. The two sets of solenoid valve units 44 share half of the group of inner surface cleaning nozzles 15, and each set of one solenoid valve is connected to one inner surface cleaning nozzle 15 and one air hose 48. They are connected in a one-to-one relationship, and individually control the supply and cutoff of air to one corresponding inner surface cleaning nozzle 15. The upper and lower portions of the air hose group 48 are connected on the rotating plate 42. The two sets of power distribution units 45 are respectively connected to the two sets of solenoid valve units 44 via electric wires 49, and individually control ON / OFF of the solenoid valves in synchronization with the turning of the turning frame 9.
[0038]
The rotary joint 43 rotatably penetrates through the cylindrical fixed joint 50, and has an upper end extending near the ceiling 51 of the cleaning room 1. The fixed joint 50 is fixed to the ceiling 51 with a bracket 52. A communication hole 53 penetrating the inside and outside of the body of the fixed joint 50 is provided. An air hose 54 from an air supply source (not shown) is connected to the communication hole, and air is supplied into the fixed joint 50. The air that has entered the fixed joint 50 is supplied to each of the two sets of solenoid valve units 44 through a communication hole 55 provided in the rotary joint 43 and an air hose 56 connected thereto.
[0039]
On the other hand, a power supply cable 57 wired along the ceiling 51 of the cleaning room 1 is connected to the rotary joint 43, and further, through a wiring lead in the rotary joint 43 and an electric wire 58 from the rotary joint 43, two power distribution units 45. It is connected to the.
[0040]
Such an air supply portion and a power supply portion are arranged above the inside of the turning frame 9 and rotate around the fixed shaft 10 together with the turning frame 9, so that the entire installation space can be reduced.
[0041]
In the above-described embodiment, the preform 3 is neutralized before the inner surface cleaning nozzle 15 and the outer surface cleaning nozzle 41 are cleaned by air injection. However, at least one of the plurality of outer surface cleaning nozzles 41 is used. For example, as shown in FIG. 22, for example, a needle-shaped discharge electrode 57 is provided as a static elimination means on the outer surface cleaning nozzle 41 at one end (left end in FIG. 19) which first jets air to the preform 3 to be sent. If the air is injected while generating a corona discharge while being built in, the ions generated by the discharge can be sprayed on the preform 3 together with the air injection to eliminate the charge.
[0042]
【The invention's effect】
As described above, according to the present invention, the inner surface and the outer surface of a large number of preforms can be efficiently cleaned by a flow operation, and the following effects can be obtained.
(1) When raising the inner surface cleaning nozzle, the inner surface of the preform is cleaned by injecting it into the preform while injecting air from before the preform enters, so the inner surface of the preform is cleaned with the inner surface cleaning nozzle. In addition to cleaning the inside and outside surfaces of the mouth of the preform.
{Circle around (2)} By performing the air injection from the inner surface cleaning nozzle until the inner surface cleaning nozzle is lowered and extracted from the preform, the inner and outer surfaces of the mouth of the preform can be cleaned even when the preform is extracted.
{Circle around (3)} By removing the electricity from the preform, the separation of dust and the like becomes easy, and the cleaning effect can be improved. In addition, if the preform is neutralized by injecting ions along with the air injection by the outer surface cleaning nozzle, static elimination while blowing and cleaning by air injection can be performed simultaneously from the same nozzle, and there is no need to separately install a static eliminator. .
[0043]
Further, the cleaning device according to the present invention has the following effects.
{Circle around (4)} By performing the reversal of the gripping member for gripping the preform and the raising and lowering of the inner surface cleaning nozzle for cleaning the inner surface of the preform using the cam with the turning of the turning frame, the operation can be performed smoothly.
{Circle around (5)} By performing the reversal of the gripping member around the axis of the pinion meshed with the ascending and descending rack, it is possible to smoothly carry out the transfer between the carry-in starwheel and the carry-out starwheel.
(6) The entire installation space can be reduced by mounting the internal piping system that supplies air to the inner surface cleaning nozzle group and the internal electric wiring system that supplies power to the solenoid valve group that controls it, inside the turning frame. .
[0044]
{Circle around (7)} The stationary frame and the revolving frame are cylindrical, the preform reversing mechanism is mounted outside the revolving frame, and the nozzle plunging mechanism is mounted inside the revolving frame.
{Circle around (8)} If the pair of holding claws are opened in conjunction with the cam follower as the swing frame rotates as the opening / closing structure of the holding member, the holding member can be opened and closed smoothly.
[Brief description of the drawings]
FIG. 1 is a perspective view of a preform.
FIG. 2 is a plan layout view of the entire system of the preform cleaning apparatus according to an example of the present invention.
FIG. 3 is a perspective view of a charge removing portion.
FIG. 4 is an external perspective view of the entire preform cleaning device.
FIG. 5 is a simplified sectional view thereof.
FIG. 6 is a plan view of an opening / closing cam for opening / closing a gripping member.
FIG. 7 is a side view of the gripping member.
FIG. 8 is a plan view of the holding member in a closed state.
FIG. 9 is a plan view of the same opened state.
FIG. 10 is a rear view of the gripping member.
FIG. 11 is a side view showing a part of a preform reversing mechanism for reversing a preform and a nozzle plunging mechanism of an inner surface cleaning nozzle.
FIG. 12 is a side view showing the operation of the preform reversing mechanism, in a state when the preform is in an upright posture.
FIG. 13 is a similar side view showing an initial state of lifting the preform.
FIG. 14 is a similar side view, with the preform further lifted.
FIG. 15 is a similar side view, with the preform beginning to flip;
FIG. 16 is a similar side view, with the preform being further turned over.
FIG. 17 is a side view similar to the above, showing a state where the preform has been turned over and is in an inverted posture.
FIG. 18 is a cross-sectional view of the nozzle cleaning mechanism of the inner surface cleaning nozzle and the outer surface cleaning nozzle.
FIG. 19 develops the elevation of the inner surface cleaning nozzle by the operation of the nozzle plunging mechanism to correspond to the arrangement of the outer surface cleaning nozzle, and at the same time, the air ejection timing of both the inner surface cleaning and outer surface cleaning nozzles FIG.
FIG. 20 is a sectional view of an internal piping system for supplying air and an internal electric wiring system.
FIG. 21 is a perspective view of a modification of the charge removing portion.
FIG. 22 is a sectional view of an outer surface cleaning nozzle having a built-in static eliminator.
[Explanation of symbols]
1 cleaning room
2 entrance
3 Preform
4 rails
5 Blast-type static eliminator
5 'Multi-blast static eliminator
6a Carrying side star wheel
6b Unloading starwheel
7 Preform cleaning device
8 Fixed frame
9 Swivel frame
10 Fixed axis
11 Sprocket wheel
12 Timing belt
13 gripping member
14. Preform reversal mechanism
15 Inner surface cleaning nozzle
16 Nozzle plunging mechanism
17 Body
18 gripping claws
19 Fixing pin
20 slider
21 Guide rod
22 links
23 ・ 24 Connecting pin
25 Cam Follower
26 Opening / closing cam
27 Spring
28 Auxiliary star wheel
29 Pinion
30 bracket
31 Bearing stand
32 racks
33 Cam Follower
34 lifting plate
35 First Cam Track
36 lifting rod
37 ・ 38 Guide bearing
39 Cam Follower
40 Second cam track
41 External surface cleaning nozzle
42 rotating plate
43 Rotary joint
44 Solenoid valve unit
45 Power distribution unit
46 ・ 47 Bracket
48 air hose
49 electric wire
50 fixed joint
51 Ceiling
52 bracket
53 communication hole
54 air hose
55 communication hole
56 air hose
57 discharge electrode

Claims (14)

For preforms that are sequentially conveyed in an inverted position with their openings facing downward, a plurality of inner surface cleaning nozzles are sequentially raised and lowered while rotating at predetermined intervals in synchronization with the preform conveyance to clean the inner surface. Cleaning the inner surface of the preform by sequentially injecting it into the preform while injecting air before entering the preform when raising the preform nozzle sequentially, and then lowering the inner surface cleaning nozzle sequentially to sequentially start from the preform During the section up to removal, the inner surface of each preform is sequentially cleaned, and a plurality of outer surface cleaning nozzles are arranged at regular intervals with the inner surface cleaning nozzles in the transport direction of the preform. and air injection to the outside of the outer surface of the preform only during the cleaning section of the inner surface by the nozzle for inner-surface cleaning to clean at the same time Preform cleaning method characterized and. 2. The preform cleaning method according to claim 1 , wherein the preform is neutralized by a neutralization unit before the inner surface is cleaned by the inner surface cleaning nozzle and the outer surface is cleaned by the outer surface cleaning nozzle . 3. An outer surface cleaning nozzle that cleans the outer surface while discharging the preform by discharging air with ions from the outer surface cleaning nozzle outside the preform while sequentially transporting the preform in an inverted position with the opening facing downward, and an inner surface cleaning nozzle Cleaning the inner surface of the preform by jetting air from the inner surface cleaning nozzle while simultaneously moving the preform into the preform and moving the preform simultaneously with the preform. . 4. The preform cleaning method according to claim 3, wherein the air injection from the inner surface cleaning nozzle is started before the preform enters, and is performed until the air is ejected from the preform. A plurality of inner surface cleaning nozzles are sequentially moved up and down while being transported while maintaining a predetermined interval in synchronization with the transport of the preform. The cleaning of the inner surface of the preform is sequentially started by sequentially rushing into the inside of the reform, and the inner surface is sequentially cleaned for each of the preforms during a section until the inner surface cleaning nozzle is sequentially lowered and sequentially extracted from the preform. At the same time, a plurality of nozzles for cleaning the outer surface, which are arranged at regular intervals with the nozzles for cleaning the inner surface in the transport direction of the preform, jet air along with ions to the outside of the preform to clean the outer surface of the preform. preform according to claim 3, wherein the cleaning simultaneous with neutralization only in the cleaning section of the inner surface by the nozzle Kiyoshi Method. A preform cleaning device that simultaneously cleans the inner surface and the outer surface of the preforms sequentially arranged and conveyed by air jet,
A gripping member for gripping the conveyed preform, a preform reversing mechanism for rotating the gripping member to invert the posture of the preform, and cleaning the inner surface of the preform with the mouth turned downward and inverted. Having a nozzle plunging mechanism for plunging the nozzles, and mounting the multiple units at equal intervals in the circumferential direction of the revolving frame,
An outer surface cleaning nozzle that injects air onto the outer surface of the preform is installed at a fixed position above a position where the inner surface cleaning nozzle protrudes into the preform,
An air supply system for supplying air to the inner surface cleaning nozzle and the outer surface cleaning nozzle is provided.The electromagnetic valve of the air supply system is configured such that air jet from the inner surface cleaning nozzle causes the inner surface cleaning nozzle to enter the preform. Before being pulled out from the preform, and on / off controlled so that air injection from the outer surface cleaning nozzle is also performed at the same time,
A preform cleaning device characterized by the above-mentioned. The turning frame is driven to turn by the driving device with respect to the fixed frame,
A gripping member, a preform reversing mechanism, and a nozzle plunging mechanism as one set of units, and a number of the units are mounted at equal intervals in a circumferential direction of the revolving frame;
The preform cleaning device according to claim 6, wherein: A preform cleaning device that simultaneously cleans the inner surface and the outer surface of the preforms sequentially arranged and conveyed by air jet,
A rotating frame is driven to rotate by a driving device with respect to a fixed frame provided with undulating first and second cam tracks along the body;
A gripping member for gripping the conveyed preforms one by one, a preform reversing mechanism for rotating the gripping member to vertically invert the posture of the preform, and a preform in which the mouth is turned down and turned down. And a nozzle intrusion mechanism for injecting an inner surface cleaning nozzle into a set of units, and a number of the units are mounted at equal intervals in a circumferential direction of the revolving frame;
The preform reversing mechanism is configured such that a cam follower mounted on a rack rolls along the first cam track as the revolving frame rotates, whereby the rack moves up and down according to the up-and-down movement of the first cam track. The pinion meshed with the rack is rotated so that the gripping member is inverted around the axis of the pinion, and the nozzle insertion mechanism mounts a cam follower on an elevating rod holding the inner surface cleaning nozzle, As the cam follower rolls along the second cam track with the turning of the turning frame, the elevating rod moves up and down according to the undulation of the second cam track, and the inner surface cleaning nozzle protrudes into the preform. And the structure to be pulled out from the preform,
A plurality of outer surface cleaning nozzles that jet air to the outer surface of the preform are installed at a fixed position above a position where the inner surface cleaning nozzle protrudes into the preform, at the same interval as the distance between the inner surface cleaning nozzles. ,
A solenoid valve for each unit for individually supplying air to the nozzle for cleaning the inner surface of each unit, and an internal piping system and an internal electric wiring system from the solenoid valve to the nozzle for cleaning the inner surface are mounted inside the turning frame. Did
A rotating joint that rotates integrally with the revolving frame and a non-rotating fixed joint are fitted on the revolving frame on the revolving axis, and the solenoid valve is connected to the external piping and the internal electric wiring system is connected to the external electric wiring at the fitting portion. That each was connected,
A preform cleaning device characterized by the above-mentioned. 9. The preform cleaning device according to claim 7, wherein the fixed frame and the revolving frame are cylindrical, the preform reversing mechanism is mounted outside the revolving frame, and the nozzle plunging mechanism is mounted inside the revolving frame. The gripping member is normally urged in a direction in which a pair of gripping claws are closed by a spring, and a cam follower attached to the gripping member engages with an opening / closing cam provided on the fixed frame side with the turning of the turning frame. 10. The preform cleaning apparatus according to claim 8, wherein a pair of gripping claws are opened in conjunction with the cam follower. 11. The preform cleaning apparatus according to claim 6, further comprising a static eliminator for neutralizing the preform before the cleaning by the inner surface cleaning nozzle and the outer surface cleaning nozzle is completed. A preform cleaning device that simultaneously cleans the inner surface and the outer surface of the preforms sequentially arranged and conveyed by air jet,
A gripping member for gripping the conveyed preform, a preform reversing mechanism for rotating the gripping member to invert the posture of the preform, and cleaning the inner surface of the preform with the mouth turned downward and inverted. Having a nozzle plunging mechanism for plunging the nozzles, and mounting the multiple units at equal intervals in the circumferential direction of the revolving frame,
An outer surface cleaning nozzle that injects air onto the outer surface of the preform is installed at a fixed position above a position where the inner surface cleaning nozzle protrudes into the preform,
An air supply system that supplies air to the inner surface cleaning nozzle and the outer surface cleaning nozzle, and a static eliminator that neutralizes the preform before cleaning by air injection of these nozzles is completed.
A preform cleaning device characterized by the above-mentioned. 13. The preform cleaning apparatus according to claim 11, wherein the static eliminator removes the static electricity of the preform by injecting ions in association with air injection by the outer surface cleaning nozzle. 13. The preform cleaning apparatus according to claim 11, wherein the static eliminator removes static electricity by blowing air before cleaning the inner surface cleaning nozzle and the outer surface cleaning nozzle by air injection.

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