JP6251561B2 - Preform alignment transport device - Google Patents

Description

  The present invention relates to a preform aligning and conveying apparatus that conveys a preform in a correct posture when the blow molding preform is conveyed to a blow molding machine, and more specifically, a preform that is not in a correct posture in a preform conveying line. Preform aligning and conveying device capable of correcting the correct conveying posture, removing the uncorrectable preform instantaneously, always supplying the preform in the correct conveying posture, and supplying a predetermined amount of the preset. It is about.

  Conventionally, a hollow container such as a PET bottle is formed by melting a synthetic resin to form a preform as an intermediate in advance, and blowing the air into the preform to perform stretch blow molding. In general, stretch blow molding is roughly divided into an injection molding process in which a preform is molded by injection molding, and a blow molding process in which the preform is heated and stretched to be molded into a predetermined shape.

  And when transferring the injection-molded preform to the next stretch blow molding process, it is packed in a large container. In order to supply the boxed preform to the stretch blow molding process, a preform conveying device for supplying the preform in a correct posture is used. The preform is conveyed or transferred by various means within each process or between processes, but must be supplied in a correct posture to the stretch blow molding process.

  Various means are used to convey the preform in a correct posture to the blow molding process, and as one of the conveying means, two rotating rolls arranged in parallel are inclined downward toward the conveying direction. At the same time, a preform conveying device is used which conveys them by rotating them in opposite directions. The distance between the two rotating rolls is slightly wider than the outer diameter of the preform body, and the head support ring is disposed between the two rotating rolls. Has been.

  When the preform is transported, the body portion of the preform is inserted between the two rolls, and the support ring of the head is locked between the two rolls to hang the preform. When the two inclined rolls are rotated outwardly opposite each other, the preform is conveyed downstream while the support ring portion slides between the rotary rolls. By removing the preform that is not properly suspended during the conveyance by the two rolls, only the preform in the correct posture is supplied to the stretch blow molding machine in the next step.

  In such a preform conveying apparatus, a preform that is not conveyed in a correct posture must be removed before being supplied to the stretch blow molding machine. It has been proposed to use a discharge wheel as a method for selectively removing preforms that are not conveyed in the correct posture.

  As such a preform transport apparatus, for example, a preform supply apparatus provided with an apparatus for selectively removing a preform in a vertical direction taking an illegal position is disclosed in JP-T-2007-515359. "A preform conveying system for a blow apparatus for containers, in particular, having means for discharging a preform in an incorrect position" described in JP-T-2007-516115.

Special table 2007-515359 gazette Special table 2007-516115 gazette

  The preform supply apparatus described in the above Japanese translation of PCT publication No. 2007-515359 lies on a preform protruding above the horizontal upper surface of two rotating rolls, for example, two rotating rolls. The preform is configured to project a spatula on a horizontally disposed rotating shaft and remove the spatula by rotating the spatula.

  In addition, when the preform is lying between two rotating rolls in the same direction as the axial direction of the roll, it does not protrude from the upper surface in the horizontal direction of the roll. Some spatulas cannot be removed. Therefore, by arranging a conveyance rail downstream of the two rotating rolls and making a part of one side of the conveyance rail a movable rail that can move horizontally, the preform lying in the axial direction is detected by a sensor. When detected, the movable rail is horizontally slid outward to widen the space between the rails and drop.

  However, if the preform on the upper surface of the roll is flipped off and removed by the rotating spatula, the preform may be damaged. Further, when the preform is dropped by sliding the movable rail to the outside, the preform conveyed from above must be temporarily stopped. Temporarily stopping the conveyance of the preform causes unevenness in the supply amount to the stretch blow molding machine, and the predetermined amount cannot be supplied for the set predetermined time. A stretch blow molding machine is always required to supply a predetermined amount of preform at a predetermined time.

  In addition, the preform supply system described in the above Japanese translation of PCT International Publication No. 2007-516115 makes the balance between the discharge wheel and the preform rotated by a laterally extending shaft disappear in order to remove the lying preform. A means for lifting is provided. The lifting means has a substantially L-shaped cross section in the lateral direction and is fixed in parallel to the flat upper surface of the rail. When the preform comes into contact with the lifting means, one side is lifted and loses balance and falls from the supply rail.

  In the configuration in which the preform is removed by the discharge wheel, the preform may be damaged in the same manner as the preform supply device described in JP-T-2007-515359. Also, in a configuration in which the lying preform is removed by means of lifting, there is a risk that one side of the preform will not necessarily be lifted and will simply be displaced, or it will be sandwiched vertically between the rails and not fall off the rails. is there.

  Furthermore, there is a problem that the preform sandwiched between the two rotating rolls is supplied to the downstream rail as it is and is conveyed while being sandwiched between the rails. In addition, even if the preform is removed by a discharge wheel or lifting means, there is a space before and after the removed preform, and the stretch blow molding machine cannot be supplied at a predetermined interval. There is.

  The present invention has been made in view of the present situation, and removes a preform having an incorrect posture on the upstream side of a conveyance path to a stretch blow molding machine and can supply a predetermined amount at a predetermined time. An alignment transport device is provided. It is another object of the present invention to provide a preform aligning and conveying apparatus capable of supplying a predetermined amount of preforms at a predetermined time without leaving an interval between the preforms.

In order to achieve the above object, the present invention is configured as follows. That is, the preform aligning and conveying apparatus according to the present invention includes:
A preform aligning / conveying device in which a preform is aligned in a correct conveying posture in the same direction and conveyed to a stretch blow molding machine,
Two transport rolls are arranged in a box-shaped transport path having parallel side walls and an open bottom, and the transport path and the two transport rolls are directed toward the preform transport direction. The two transport rolls are inclined to the downstream side, insert the body portion of the preform to be transported, but have an interval for locking the support ring portion of the head, and rotate in opposite directions. Are arranged horizontally as
Above the two transporting rolls, a preform is guided between the two transporting rolls, and guide rails that are inclined downward on the inside are arranged to face each other.
On the upper side of the transport path, a preform aligning unit that corrects a preform having an incorrect transport posture to a correct transport posture is provided, and the preform aligning unit rotates in the transport direction of the preform. Is formed by
A preform removing unit that removes a preform having an illegal conveying posture is provided in an intermediate portion of the conveying path, and the preform removing unit includes a photoelectric sensor that detects presence / absence of a preform and a photoelectric sensor. It consists of a detection means with a reflecting plate arranged on the opposite side, and a discharge means with an air blow nozzle that jets air,
A roll rotation adjustment unit that adjusts the rotation speed of the two conveyance rolls is provided on the lower side of the conveyance path. The roll rotation adjustment unit includes a low speed detection sensor, a high speed detection sensor, and a capability roller stop detection. It has a sensor.

  A recovery box that collects the preform that has been removed is provided in the area of the transport path where the preform removal unit is provided, and an inclined plate is provided between the transport path and the recovery box by cutting out the upper part of the transport path. It is preferable that one side end of the inclined plate is close to the transport roll and the other side end reaches the inside of the preform collection box.

  A preform feeding device is disposed on the upper end side of the preform aligning / conveying device, and the preform feeding device includes a belt conveyor, a shooter, and a belt conveyor that are disposed toward the downstream side. The shooter may be configured such that a full detection sensor, a high speed detection sensor, a low speed detection sensor, and a lower limit detection sensor are sequentially arranged toward the downstream side.

  A preform supply amount regulating device to the stretch blow molding machine is disposed on the lower end side of the preform aligning and conveying device, and the preform supply amount regulating device is configured to perform the preform from two conveyance rolls. And a pair of capacity rollers arranged so that the head of the preform from the rail can be sandwiched and sent out.

  According to the preform aligning and conveying apparatus according to the present invention, the preforms that are cluttered by the guide rails arranged to face each other can be guided and aligned between the two conveying rolls. In addition, a preform that is not in the correct conveyance posture can be dropped between the two conveyance rolls by the baffle plate in the preform alignment unit, and can be corrected to the correct conveyance posture. Furthermore, since the preform having the incorrect conveying posture can be removed by the preform removing unit, only the preform having the correct posture can be supplied to the stretch blow molding machine.

  Further, when the collection chute is provided in the range of the conveyance path where the preform removal unit is provided, the preform can be collected and supplied again to the preform alignment and conveyance device. Further, when the preform supply device is disposed on the upper end side of the preform alignment / conveyance device, it is possible to supply the preforms to the preform alignment / conveyance device in appropriate amounts.

  When a preform supply amount regulating device for the stretch blow molding machine is disposed on the lower end side of the preform aligning and conveying device, a preset amount of preform can be supplied in a stable state.

It is a side view for explanation showing the whole preform conveyance system including a preform alignment conveyance device. It is the explanatory side view which abbreviate | omitted a part of the aligning and conveying apparatus of a preform. FIG. 5 is an explanatory plan view in which a part of the preform alignment and transport apparatus is omitted. It is a side view for description which shows the ability shooter of a preform. It is a side view for description which shows the connection part of an entrance shooter and an alignment conveyance apparatus. It is sectional drawing in the FIG. 2A-A part. It is a top view for explanation similarly. It is explanatory drawing explaining the attitude | position at the time of conveyance of a preform. It is explanatory drawing which shows the other attitude | position at the time of conveyance of a preform. It is sectional drawing of the preform alignment conveyance apparatus which shows the alignment guide plate and baffle plate of a preform. It is sectional drawing for description which shows the detection apparatus and air blow nozzle which correct the preform of an unauthorized conveyance attitude | position. It is a top view which shows the sensor part which removes the preform of an incorrect posture. It is sectional drawing which similarly shows the sensor part of a preform. It is a cross-sectional top view which shows arrangement | positioning of a sensor and a collection | recovery chute. It is sectional drawing for description which shows arrangement | positioning of a sensor. It is an explanatory side view which similarly shows arrangement | positioning of an air nozzle. It is a side view for description of the sensor part which adjusts the conveyance speed of a preform. It is explanatory drawing of a preform supply amount control apparatus. It is sectional drawing of the capability roller in a preform supply amount control apparatus similarly. It is also a plan view.

  Below, based on drawing, embodiment of the aligning and conveying apparatus of the preform in a preform conveyance system is described. First, the entire preform transport system will be described. The preform transport system includes a preform transport unit 1 that supplies a preform from a container unloaded from a preform storage, and a crosspiece that transports the preform upward. A belt conveyor 2, a preform supply device 3 that supplies a preform to a preform alignment and conveyance device, and a preform alignment and conveyance device that conveys the preform from the preform supply device 3 in a correct orientation in the same direction. 4 and a preform supply amount regulating device 5 for feeding the preform from the preform aligning and conveying device 4 to the stretch blow molding machine at a predetermined interval.

  The preform transport unit 1 includes a container reversing mechanism 11 for placing and reversing a container storing a preform stored in a preform storage, and a conveyor device 12. The container reversing mechanism 11 is provided with a rotating shaft 11b at one upper end of a box-type storage frame 11a that holds the container, and is formed so as to be reversed about the rotating shaft 11b. When the storage frame 11a is inverted, the held container opening rotates downward and supplies the preform to the upper end of the conveyor device 12.

  The conveyor device 12 is a belt conveyor arranged in a staircase, and is arranged in a staircase with a receiving conveyor 12a, an upper conveyor 12b, an intermediate conveyor 12c, and a lower conveyor 12d to which preforms are supplied. They are arranged so that the conveying speed increases sequentially toward the downstream. The preform is transferred from the lower conveyor 12d to the horizontal conveyor 12e, and the preform on the horizontal conveyor 12e is dropped onto the belt C / V 13 disposed downstream.

  The preform conveyed from the belt C / V 13 is rescued by the cross belt conveyor 2 and conveyed to the upper preform supply device 3. The cross belt conveyor 2 can be changed to other conveying means.

  The preform supply device 3 is configured to be able to adjust the supply amount so that the preforms scooped and conveyed from the belt C / V 13 by the cross belt conveyor 2 are supplied to the preform alignment and conveyance device 4 by an appropriate amount. Yes. As shown in FIG. 4, the preform supply device 3 includes a belt conveyor 31 that receives and conveys the preform falling from the cross belt conveyor 2, a shooter 32, and a belt conveyor 33 that drops into the preform alignment and conveyance device 4. Become. The belt conveyor 31 is driven by a motor 34.

  The shooter 32 is inclined toward the downstream side, and a lower limit detection sensor 32a, a high speed detection sensor 32b, a low speed detection sensor 32c, and a full detection sensor 32d are sequentially provided from the downstream to the upstream.

  The belt conveyor 33 disposed on the downstream side of the shooter 32 is driven by a motor 35 and is set so as to always carry a certain amount of preform. A fixed amount of preform stays as a buffer between the shooter 32 and the belt conveyor 33.

  The rotation speed of the motor 35 is not adjusted by a sensor provided in the shooter 32. When the buffer amount is detected by the high-speed detection sensor 32b of the shooter 32 and it is determined that the preform supply amount is small, the motor 34 is rotated at a high speed. The buffer amount is detected by the low speed detection sensor 32c of the shooter 32, and when it is determined that the supply amount is large, the motor 34 is set to rotate at a low speed.

  When the preform dropped from the belt conveyor 31 slides down the shooter 32 and detects the high speed detection sensor 32b, the motor 35 is activated. The belt of the belt conveyor 33 is rotated by the operation of the motor 35, and the preform is conveyed to the preform alignment and conveyance device. When the lower limit detection sensor 32a of the shooter 32 runs out of the preform buffer, the rotation of the motor 35 is stopped.

  Further, when the preform buffer in the shooter 32 reaches the full detection sensor 32d, the movement of the motor 34 is stopped by the detection of the full detection sensor 32d. In this way, in the preform supply device 3, the amount of preform supplied to the preform aligning / conveying device 4 is adjusted to be within a certain range. The preform orientation is adjusted by the preform aligning / conveying device 4 so that the preform supplied from the preform supply device 3 is sent to the stretch blow molding machine in a correct posture.

  Next, the preform aligning and conveying apparatus 4 will be described. An overall view of the preform aligning and conveying apparatus 4 is shown in FIGS. The preform aligning and conveying apparatus 4 includes a preform introducing unit 41, a preform aligning unit 42, a preform removing unit 43, and a roll rotation adjusting unit 44.

  First, the conveyance path 45 constituting the preform alignment conveyance device 4 will be described. Two transport rolls 45b and 45b are disposed in a box-shaped transport path 45 having parallel side walls and an open bottom. The conveyance path 45 is inclined downward toward the downstream side, and the two conveyance rolls 45b and 45b are similarly inclined and arranged. A predetermined interval is provided between the transport rolls 45b and 45b.

  As shown in FIGS. 8 to 14, the intervals between the transport rolls 45 b and 45 b can be inserted into the body portion of the preform, but are arranged so that the neck portion is locked. A timing pulley 45c is attached to the two transfer rolls 45b and 45b, and is wound between a timing pulley 45e of a geared motor 45d and a timing pulley 45f provided horizontally with the timing pulley 45c. It is rotated via the timing belt 45g.

  The transport rolls 45b and 45b rotate in opposite directions, and are configured to rotate outward in the embodiment. In addition, although the rolls 45b and 45b for conveyance may each be integral, they may be connected via a coupling. In the case of coupling, it is preferable to shift the coupling position of the couplings in the axial direction of the transport rolls 45b and 45b, rather than the opposed positions.

  As shown in FIGS. 6 and 9, a guide rail 45h is disposed on the upper side of the transport rolls 45b and 45b so as to face downward. The guide rail 45h is a guide plate for dropping the preform supplied from the preform supply device 3 between the conveying rolls 45b and 45b, and the inner end thereof is opposed to the upper side of the conveying rolls 45b and 45b. Yes.

  As shown in FIGS. 2 and 6, the preform introduction portion 41 connected to the preform supply device 3 at the upper end portion of the conveyance path 45 has a U-shape that reaches above the ends of the conveyance rolls 45 b and 45 b. A bag 45k is provided. The preform supplied from the preform supply device 3 falls on the U-shaped bowl 45k, and further falls on the guide rail 45h, and is guided between the transport rolls 45b and 45b by the guide rail 45h.

  The preform guided between the transport rolls 45b and 45b is transported in a suspended state by inserting the body portion of the preform and engaging the support ring portion with the transport rolls 45b and 45b. However, all the preforms are not necessarily inserted into the transport rolls 45b and 45b in a proper transport posture in a suspended state with the mouth portion facing upward and the bottom portion of the body portion facing downward.

  Next, the state of the preform in which the preform is transported by the transport rolls 45b and 45b will be described. As shown in FIG. 8, normally, like the preform P1, the mouth portion Pb of the head portion Pa is turned up, the body portion Pc is inserted between the transfer rolls 45b and 45b, and the support ring portion Pd is inserted. It is transported in a suspended state by being engaged with the transport rolls 45b and 45b.

  On the other hand, the body part Pc may not be inserted between the transport rolls 45b and 45b and may not be in the correct transport posture. For example, it may be in a state of horizontally extending with respect to the axes of the transport rolls 45b and 45b, as in the preform P2, or to the axes of the transport rolls 45b and 45b as in the preform P3. In some cases, they are sandwiched in the same direction. Furthermore, although the support ring part Pd is engaged with the transport rolls 45b and 45b and is suspended, there may be a preform P4 in which two preforms overlap.

  Normally, when the body part Pc is positioned between the transport rolls 45b and 45b, the support ring part Pd is lowered from the gap and the support part Pd is locked, so that the mouth Pb is in the correct transport posture. An illegal conveying posture like the preforms P2 and P3 is a case where the front and rear are sandwiched and fixed by the preform P1. Like the preforms P2, P3, and P4, preforms that are not in the correct conveying posture cannot be supplied to the stretch blow molding machine. Therefore, the preform aligning / conveying apparatus 4 includes a preform aligning unit 42 and a preform removing unit 43.

  As shown in FIGS. 3 and 9, the preform alignment unit 42 includes a baffle plate 42 a that closes between the transport rolls 45 b and 45 b from above. The bottom surface of the front end of the baffle plate 42a is positioned slightly above the top surface of the mouth of the preform P1, and only the preform in the correct conveying posture like the preform P1 passes therethrough. When the baffle plate 42a is pushed by the preform P2 or the like, the baffle 42a is rotated by the shaft 42b at the upper end portion and swings downstream, and when the push of the preform P2 is released, the baffle plate 42a returns to its original position, like a pendulum. It is formed to reciprocate.

  When the preform P2 being conveyed comes into contact with the baffle plate 42a, the preform is dropped between the conveyance rolls 45b and 45b while the baffle plate 42a is rotated in the downstream direction, so that the correct conveyance posture as in the preform P1 is obtained. to correct. When the preform passes, the baffle plate 42a returns and prepares for the next preform with an illegal conveying posture. By disposing a plurality of baffle plates 42a, the preform P2 or the like can be corrected to the preform P1 in the correct conveying posture by any one of the baffle plates 42a.

  In some cases, the preforms P3 and P4 cannot be corrected to the correct conveying posture by the baffle plate 42a. Since the preform P3 is sandwiched between the transport rolls 45b and 45b in the axial direction, the preform P3 passes through a position lower than the lower surface of the front end of the baffle plate 42a and does not contact the baffle plate 42a. It is. Further, in the case of the preform P4, although the upper preform contacts the baffle plate 42a, the upper preform may pass only by tilting without coming off the lower preform.

  Furthermore, as a preform with an incorrect conveyance posture, for example, as shown in FIG. 9, the mouth portion Pb faces upward, but the support ring portion Pd is sandwiched between the front and rear preforms so that the mouth of the front and rear preforms. There is a preform P5 that is conveyed while being locked to the portion Pb. Such a preform P5 also contacts the baffle plate 42a, but is conveyed while pushing the baffle plate 42a as it is because the front and back are sandwiched between the preforms 1. When the preform P5 passes and the pushing of the baffle plate 42a is released, the released baffle plate 42a returns to the original position.

  In the case of the preform P5 as described above, it is necessary to correct the preform P1 in the correct conveying posture. Therefore, as shown in FIGS. 9 and 11, it is preferable to arrange an air blow nozzle 46 that is positioned between the two transport rolls 45 b and 45 b and that injects from the front in the transport direction toward the upstream side. When the preform P5 locked to the two preforms is detected by the detection device, the air blow nozzle 46 injects air toward the preform P1 next to the detected preform P5.

  When air is injected, the conveyance of the rear preform P1 is temporarily stopped as shown by a dotted line in FIG. When the conveyance of the rear preform is temporarily stopped, a gap is formed between the preform P5 and the locked state of the preform P5 is released, so that the preform P5 falls and the normal conveying posture is obtained. Therefore, the preform held by the two preforms may be returned to the normal conveying posture without being removed.

  The preform P5 in the incorrect conveyance posture is detected by the detection device. The detection device 46a can be configured by, for example, a reflection plate 46a2 provided on the side wall facing the photoelectric sensor 46a1 shown in FIG. If the light emitted from the photoelectric sensor 46a1 is blocked and is not received by the reflecting plate 46a2, the air is ejected from the air blow nozzle 46, assuming that the preform P5 has an incorrect conveying posture. The air from the air blow nozzle 46 is jetted toward the preform P1 next to the detected preform P5.

  Next, the preform removing unit 43 that removes the preforms P3 and P4 that have passed through the baffle plate 42a in an unauthorized conveyance posture will be described. The preform removing unit 43 is shown in FIGS. 3 and 12 to 16. First, the preform sandwiched in the axial direction between the transport rolls 45b and 45b like the preform P3 passes through the lower surface of the baffle plate 42a, and the bottom surface of the body portion Pc is the transport rolls 45b and 45b. It does not protrude further downward. Therefore, a preform removing unit 43 that detects and removes these preforms is provided.

  The preform removing unit 43 includes a detection unit 47A and a discharge unit 47B. The detection means 47A includes a detection device 47a that detects the presence or absence of a preform projecting from the transport rolls 45b and 45b, and a detection device 47b that detects the presence or absence of a preform projecting from the lower surface of the transport rolls 45b and 45b. And a detection device 47c for detecting whether or not there is a preform between the transport rolls 45b and 45b. When the discharge means 47B blows off the preform P3 sandwiched between the transport rolls 45b and 45b from below, the discharge means 47B blows off the air blow nozzle 47d and the preform P4 in which two or more preforms are fitted and stacked. It consists of an air blow nozzle 47e.

  In the conveyance path 45, a preform collection box 48 for collecting the removed preform is installed in a range where the preform removing unit 43 is provided. An upper surface 48a of the preform collection box 48 is open, and an inclined plate 48b for guiding the blown preform is disposed. The inclined plate 48b is notched at the upper part of the side wall of the conveyance path 45 on the side where the preform collection box is installed, and is placed on the upper end of the inclined plate 48b. The side end of the inner side reaches the inside of the preform collection box 48 (see FIGS. 14 and 16).

  Next, the detection device 47a is configured by a photoelectric sensor 47a1 provided on the side wall of the transport path 45 and a reflector 47a2 provided on the side wall of the preform recovery box 48 on the opposite side. If the light emitted from the photoelectric sensor 47a1 is blocked and is not received by the reflecting plate 47a2, it is regarded as the preforms P2 and P4 in the incorrect conveyance posture, and air is ejected from the air blow nozzle 47e to be removed.

  As shown in FIGS. 14 and 15, the detection device 47b advances and retreats to the lower inner side of the photoelectric sensor 47b1 provided on the side wall of the conveyance path 45 and the conveyance roll 45b opposite to the photoelectric sensor 47b1 side. It is comprised by the reflecting plate 47b2. The reflection plate 47b2 is attached to one side of a pair of guide members 47b3, and a slit 47b4 through which light from the photoelectric sensor 47b1 passes is formed in the pair of guide members.

  The pair of guide members 47b3 is connected to the rod of the air cylinder 47b5 so that it can be replaced depending on the type of preform. In the detection device 47b configured as described above, when the light from the photoelectric sensor 47b1 passes through the slit 47b4 and is received by the reflection plate 47b2, it is determined that there is no preform.

  Further, the detection device 47c includes a photoelectric sensor 47c1 installed above the transport path 45, and a reflector 47c2 installed below the transport rolls 45b and 45b. The light from the photoelectric sensor 47c1 is received by the reflection plate 47c2 through the conveyance rolls 45b and 45b, and when the light reception is interrupted for a predetermined time, it is judged as a preform P3 and air is injected from the air blow nozzle 47d. Remove.

  The operation of the preform removing unit 43 will be described. The preform P1 in the correct conveyance posture is not detected by the detection means 47a, but the preforms P2 and P4 in the incorrect conveyance posture are detected, and the air blow It is removed by jetting air from the nozzle 47e. The preform P3 that is not detected by the detection means 47a and the detection means 47b but is detected by the detection means 47c is removed by the injection of air from the air blow nozzle 47d installed upward.

  In order to prevent damage to the preform P3 blown off by the air blow nozzle 47d, a buffer film 47f is provided above as shown in FIGS. The blown preform P3 is weakened by the buffer film 47f and stored in the preform collection box 48. The preform that has fallen into the preform collection box 48 is collected by a conveyor device (not shown) or the like and is re-inserted into the preform supply device 3.

  Next, the roll rotation adjusting unit 44 will be described. The roll rotation adjusting unit 44 is shown in FIGS. The roll rotation adjustment unit 44 is provided on the downstream side of the conveyance path 45, and adjusts the rotation speed of the conveyance rolls 45b and 45b and the speed of the belt C / V 33 so as to send a predetermined amount of preform to the stretch blow molding machine. To do. The roll rotation adjusting unit 44 includes a low speed detection sensor 51, a high speed detection sensor 52, and a capability roller stop detection sensor 53.

  When the low speed detection sensor 51 determines that the amount of the preform passing within a predetermined time is large and the rotation of the transport roll 45b is low, the low speed detection sensor 51 instructs to reduce the rotation speed of the geared motors 45d and 35. Further, when the high speed detection sensor 52 determines that the amount of the preform passing within a predetermined time is small, the high speed detection sensor 52 instructs to increase the rotational speed of the geared motors 45d and 35. Further, when the lower limit detection sensor 53 determines that there is no preform, the rotation of the geared motor 65 is stopped, but the operation of the cross belt conveyor 2 and the preform supply device 3 is set to the operating state.

  When the capability roller stop detection sensor 53 detects that a trouble has occurred in the middle of the conveyance to the stretch blow molding machine and the stretch blow molding machine, it stops the rotation of the geared motor 45d and the preform conveyance unit 1, The operation of the belt conveyor with a cross 2 and the preform supply device 3 is stopped.

  Next, the configuration of the preform supply amount regulating device 6 will be described with reference to FIGS. The preform supply amount regulating device 6 keeps the preform supply amount to the stretch blow molding machine constant, and rotates with the rails 61 and 61 connected to the front end portion of the transport path 45. 62, 62. The rails 61 and 61 are formed at intervals at which the body part Pc of the preform P1 is inserted and the support ring part Pd is locked, and are inclined downward toward the downstream side.

  The upper ends of the upstream sides of the rails 61 and 61 are close to the transport rolls 45b and 45b, and the distance between the rails 61 and 61 is substantially the same as the distance between the transport rolls 45b and 45b. Renovation is delivered. An air blow nozzle 63 for forcibly pushing the preform into the rails 61 and 61 is disposed above the rails 61 and 61. The preform P1 forcibly pushed into the rail by the air from the air blow nozzle 63 slides down on the rails 61 and 61.

  The downstream ends of the rails 61 and 61 are close to the capability rollers 62 and 62 so that the preform can be transferred, and the capability rollers 62 and 62 are inclined at substantially the same angle as the rails 61 and 61. . The upper surfaces of the rails 61 and 61 reach the lower surfaces of the capability rollers 62 and 62, and the capability rollers 62 and 62 are arranged at positions where the preform head Pa can be sandwiched.

  As shown in FIG. 19, the ability rollers 62 and 62 are opposed to each other with a predetermined interval so as to sandwich the head Pa of the preform P1, and rotate in opposite directions. A round belt 62a made of an elastic material is wound around the outer peripheral surfaces of the capacity rollers 62 and 62 in order to protect the preform and prevent slipping. Accordingly, the capacity rollers 62 and 62 can feed the preforms from the rails 61 and 61 while rotating them.

  Spur gears 64, 64 are attached to the rotation shaft 65 of the capacity rollers 62, 62, and the one rotation shaft 65 is driven by a geared motor 65. The spur gears 64, 64 rotate through meshing spur gears 64a, 64a, respectively. That is, as shown in FIG. 18, when the spur gear 64 is rotated by the geared motor 65, the meshing spur gears 64a and 64a rotate, and one spur gear 64a rotates the other spur gear 64. The capacity roller 62 attached to the rotating shaft rotates. The spur gears 64 and 64 rotate the capacity rollers 62 and 62 in opposite directions by passing through the two spur gears 64a and 64a.

  The capacity rollers 62, 62 can supply a preset amount of preform to the stretch blow molding machine by rotating at a constant speed. By supplying a constant amount at a constant speed by the capacity rollers 62, 62, it is possible to operate the stretch blow molding machine efficiently and stably without causing excessive supply or supply shortage of the stretch blow molding machine. it can.

  In addition, the preform is pushed by the air from the air blow nozzle 63 and slides down on the rails 61 and 61, so that the body part slides down while swinging back and forth like a pendulum. By receiving by the capacity rollers 62, 62, it is possible to prevent the preform from shaking. Therefore, the preform can be transported to a stretch blow molding machine while maintaining a vertically suspended state.

P: Preform
Pa: head
Pb: mouth
Pc: trunk
Pd: Support ring part
1: Preform transport section
2: Belt conveyor with crosses 3: Preform feeder
4: Preform alignment transport device
5: Roll rotation adjusting unit 6: Preform supply amount regulating device 11: Container reversing device
11a: Box-type storage frame 11b: Rotating shaft
12: Conveyor device 13: Storage box
31: Belt conveyor 32: Shooter 32a: Lower limit detection sensor 32b: High speed detection sensor 32c: Low speed detection sensor 32d: Full detection sensor 33: Belt conveyor 34, 35: Motor 41: Preform introduction unit 42: Preform alignment unit 42a: Baffle plate 43: Preform removing unit 44: Roll rotation adjusting unit 45: Conveying path 45a: Conveying path 45b: Conveying roll 45c: Timing pulley 45d: Gear motor 45e: Timing pulley 45f: Timing belt 45g: Guide rail 45h: U-shaped Saddle 46: Air blow nozzle 47: Removal means 47A: Detection means 47B: Discharge means 47a, 47b, 47c: Detection devices 47d, 47e: Air blow nozzle 48: Preform collection box 51: Low speed detection sensor 52: High speed detection sensor 53: Roller stop detection center Sa 61: rail
62: Capability roller
63: Air blow nozzle 64: Spur gear

Claims (5)

A preform aligning / conveying device in which a preform is aligned in a correct conveying posture in the same direction and conveyed to a stretch blow molding machine,
Two transport rolls are arranged in a box-shaped transport path having parallel side walls and an open bottom, and the transport path and the two transport rolls are directed toward the preform transport direction. The two transport rolls are inclined to the downstream side, insert the body portion of the preform to be transported, but have an interval for locking the support ring portion of the head, and rotate in opposite directions. Are arranged in parallel ,
On the upper side in the vertical direction of the two transport rolls , two guide plates for dropping the preform between the two transport rolls face each other and face the inside of the two transport rolls. The guide rail that is inclined downward
An upstream side of the transport path is provided with a preform aligning unit that corrects a preform having an incorrect transport posture to a correct transport posture, and the preform aligning unit rotates in the transport direction of the preform. Is formed by
A preform removing unit that removes a preform having an illegal conveying posture is provided in a middle portion of the conveying path, and the preform removing unit includes a photoelectric sensor that detects presence / absence of a preform and a photoelectric sensor. It consists of a detection means with a reflecting plate arranged on the opposite side, and a discharge means with an air blow nozzle that jets air,
A roll rotation adjustment unit that adjusts the rotation speed of the two conveyance rolls is provided on the downstream side of the conveyance path. The roll rotation adjustment unit includes a low speed detection sensor, a high speed detection sensor, and a capability roller stop detection. A preform aligning and conveying apparatus comprising a sensor. 2. The preform alignment transport according to claim 1, wherein an air blow nozzle that injects from the downstream side toward the upstream side on the lower side in the vertical direction of the two transport rolls is disposed in the preform alignment unit. apparatus. A recovery box for recovering the removed preform is provided in a range provided with the preform removal portion of the transport path, and an upper portion of the side wall in the transport path is cut out between the transport path and the recovery box. The inclined plate is placed, and one side end of the inclined plate is close to the transfer roll, and the other side end reaches the inside of the preform collection box. The preform aligning and conveying apparatus according to 2. A preform supply device is disposed at an upstream end portion of the preform aligning / conveying device, and the preform supply device includes a belt conveyor, a shooter, and a belt conveyor disposed toward the downstream side. The preform according to claim 1 or 2, wherein the shooter is provided with a full detection sensor, a high speed detection sensor, a low speed detection sensor, and a lower limit detection sensor in order toward the downstream side. Alignment transport device. At the downstream end of the preform aligning / conveying device, a preform supply amount regulating device to the stretch blow molding machine is arranged, and the preform supply amount regulating device is configured to perform the preform from two conveying rolls. 3. A rail according to claim 1, further comprising: a pair of capability rollers arranged so as to sandwich and feed a head of a preform supplied from the rail. Preform alignment transport device.

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