JP6280752B2 - Cup-shaped paper container forming machine - Google Patents

Description

  The present invention relates to a molding machine for molding a cup-shaped paper container such as a paper cup from a sheet blank mainly composed of paper.

The thing of patent document 1 is known as a molding machine for shape | molding the paper cup used for containers, such as a drink and food.
Referring to FIG. 23, the paper cup forming machine (100) is an apparatus for continuously forming a paper cup from two blanks constituting the body part and the bottom part, and includes a body part forming apparatus (120) and And a bottom molding device (130) and a top curl molding device (140).
The body forming device (120) includes a turret (121) in which a plurality of body forming mandrels (122) are provided radially at intervals in the circumferential direction and rotated about a horizontal axis. The mandrel (122) has a truncated cone shape. In this device (120), the body forming blank (B1) supplied to a predetermined position on the mandrel turning path by the blank supply device is wound around the mandrel (122), and the both ends of the blank (B1) are overlapped. By joining, the tapered cylindrical body of the paper cup is formed. The blank (B1) is, for example, a sheet formed by laminating a thermoplastic resin layer on at least one side of a paperboard, punched into a fan-shaped curved strip, and both ends of the blank (B1) are on the blank supply path. After being heated by a provided heater (not shown), it is supplied to the body forming device (120), and is heat-sealed by being superposed on the surface of the mandrel (122).
The bottom forming device (130) has a table (131) that is rotated about a vertical axis. The table (131) is arranged at a predetermined distance from the turret (121) in a direction perpendicular to the rotation surface of the turret (121) of the body forming device (120). On the outer periphery of the table (131), a plurality of bottom forming mandrels (132) are provided in a hanging manner at intervals in the circumferential direction. In this apparatus (130), the body part transferred from the mandrel (122) of the body forming apparatus (120) is fitted to the outside of the mandrel (132), and in a plurality of processing stations provided on the mandrel turning path, The bottom part of a paper cup is shape | molded by joining a trunk | drum with the baseplate which consists of blanks. In the apparatus of FIG. 23, the bottom plate is formed by punching out a tape-like blank sheet (B20) supplied by the blank supply means in a circular shape at the bottom plate forming station provided on the mandrel turning path, and its peripheral portion is downward. It is formed by pressing so as to be bent. The intermediate formed body of the paper cup in which the body part and the bottom part are formed is transferred from the sending station located between the final processing station and the bottom plate forming station on the mandrel turning path to the next top curl forming apparatus (140). Is sent out.
The top curl forming apparatus (140) has a table (141) that is rotated about a vertical axis. On the outer periphery of the table (141), a plurality of holders (142) capable of accommodating the intermediate formed body of the paper cup are provided at intervals in the circumferential direction. On the holder turning path, there is provided a receiving station which is disposed immediately below the feeding station of the bottom molding apparatus (130) and receives the intermediate molded body from the mandrel (132) by the holder (142). And the top curl of a paper cup is shape | molded by carrying out top curl processing of the upper edge part of an intermediate molded object in the some processing station provided on the holder turning path | route. Through the above steps, a paper cup having a body portion, a bottom portion, and a top curl is formed (see FIG. 21).

Here, in the conventional paper cup forming machine (100) described above, the transfer of the body part from the body forming apparatus (120) to the bottom part forming apparatus (130) is performed by the following body part transfer device. Yes. That is, the trunk transfer device includes a transfer turret (150) in which a plurality of vacuum suction pads (151) are provided at intervals in the circumferential direction and rotated about a horizontal axis, and a ring-shaped holder (161). It comprises a transfer arm (160) which is provided at the tip and can be swung horizontally, and a push-up device (not shown). The transfer turret (150) is placed between the turret (121) of the body forming device and the table (131) of the bottom forming device so that its rotational surface is orthogonal to the rotational surface of the turret (121) of the body forming device. The body portion is received by the vacuum suction pad (151) from the mandrel (122) coming to the upper end of the turning path. The transfer arm (160) receives the barrel from the vacuum suction pad (151) that has reached the side turning position closest to the table (131) by the holder (161), and then swings it by a predetermined angle, The trunk is transferred directly below the mandrel (132) at a predetermined turning position. And the trunk | drum accommodated in the holder (161) is pushed up with a pushing-up apparatus, and it fits on the outer side of the mandrel (132).
As described above, in the conventional paper cup molding machine (100), the transfer turret (150), the transfer arm (160), and the push-up device are transferred when the barrel is transferred from the barrel forming device (120) to the bottom molding device (130). Therefore, there is a problem that the position of the transferred body portion is shifted in the circumferential direction and the length direction, and the generation rate of defective molding is increased.

US Pat. No. 5,871,430

  The object of the present invention is to reduce the number of intermediate moldings transferred between devices for molding each part of the container, thereby reducing the occurrence of positional displacement associated with the delivery, thereby reducing the occurrence of molding defects. An object of the present invention is to provide a cup-shaped paper container molding machine.

In the case of the conventional paper cup forming machine (100) described above, the transfer of the body portion between the body forming device (120) and the bottom portion forming device (130) is performed between the mandrel (122) and the mandrel (132). Therefore, since it is necessary to change the direction of the barrel part to the opposite direction, a total of three steps by the transfer turret (150), the transfer arm (160) and the push-up device are required (see FIG. 23).
Therefore, the present inventors have found that the number of times of transfer between the respective part forming apparatuses can be reduced by partially changing the order of forming the body part, the bottom part, and the top curl, and the present invention has been completed. It is a thing.
That is, the cup-shaped paper container molding machine according to the present invention has a first rotating body in which a plurality of body-forming mandrels are provided radially at intervals in the circumferential direction and rotated about a horizontal axis. A body forming device that forms the body of the container by winding a blank supplied on the mandrel swirl path around the mandrel and joining both ends thereof, and a plurality of holders that can accommodate the body are circumferential And a second rotating body that is rotated about a vertical axis, and the upper edge of the body portion that is passed from the mandrel to the holder is provided on the holder turning path. A top curl forming apparatus for forming a top curl of a container by performing top curl processing at a plurality of processing stations, and a plurality of bottom forming mandrels capable of fitting a body portion with a top curl Has a third rotary member is rotated around a and the vertical axes spaced in the direction, provided the top curl with barrel that was passed to the mandrel from the holder on the mandrel revolving channel A plurality of processing stations are provided with a bottom forming device for forming the bottom of the container by joining with a bottom plate made of a blank (Claim 1).

In the cup-shaped paper container molding machine according to the present invention, the paper container is molded in the order of the barrel forming device, the top molding device, and the bottom molding device. ) Is delivered. The transfer of the body part from the mandrel of the body forming apparatus to the holder of the top curl forming apparatus does not require a large change in the direction of the body part as in the case of the transfer from the mandrel to the mandrel. Similarly, the transfer of the body part from the holder of the top molding apparatus to the mandrel of the bottom molding apparatus is also performed once.
Therefore, according to the cup-shaped paper container molding machine of the present invention, the occurrence of misalignment accompanying the delivery of the intermediate molded body is reliably reduced, and the occurrence of molding defects due to misalignment is also reduced.

  In a preferred basic form of the cup-shaped paper container forming machine according to the present invention, the first rotating body of the body forming device includes a plurality of body forming mandrels arranged radially at intervals in the circumferential direction, and a horizontal axis. A table in which the second rotating body of the top curl forming apparatus is provided with a plurality of holders that can accommodate the body portion at intervals in the circumferential direction and is rotated about a vertical axis. And the third rotating body of the bottom molding device is composed of a table in which a plurality of bottom molding mandrels capable of fitting a top curled body portion are provided at intervals in the circumferential direction and rotated about a vertical axis ( Claim 2).

  According to the paper container molding machine having the above basic form, the top curl molding in the top curl molding apparatus and the bottom molding in the bottom molding apparatus can be respectively performed by vertical pressing with a press or the like. Configuration becomes easy.

  In a preferred aspect of the cup-shaped paper container molding machine of the above basic form (Claim 2) according to the present invention, the trunk molding apparatus has a trunk feeding station disposed at the lower end on the mandrel turning path, The top curl forming apparatus is located on the holder turning path immediately below the trunk feeding station, and the trunk feeding station with the top curl is disposed between the final processing station and the trunk receiving station. The bottom forming apparatus has a top curled body receiving station disposed immediately above the top curled body sending station on the mandrel turning path (Claim 3).

  In the molding machine of the above aspect, the delivery of the body part from the body forming apparatus to the top curl forming apparatus and the delivery of the body part with the top curl from the top curl forming apparatus to the bottom forming apparatus are both vertical. Since it becomes a straight line and the distance can be shortened, it is difficult for the intermediate molded body such as the body part to be displaced due to the delivery, and the delivery means can also have a simple structure. Moreover, in the case of the molding machine of the above aspect, the turret of the body molding device and the table of the top curl molding device, and the table of the top curl molding device and the table of the bottom molding device are arranged so that some of them overlap each other. This leads to a compact molding machine as a whole.

In the cup-shaped paper container molding machine according to the above aspect (Claim 3) according to the present invention, the barrel is moved along the length of the mandrel so that the barrel portion can be pushed down from the mandrel at the barrel feeding station. The body receiving device of the top curl forming device is provided with a body pushing device for transferring the body pushed down from the mandrel to the holder while being sandwiched in the body thickness direction by the clamping means. (Claim 4).
In this case, preferably, the body pushing-down device has a wedge-shaped pressing claw portion inserted between the inner peripheral surface of the upper edge portion of the body portion and the surface of the mandrel (Claim 5). The barrel transfer device has an insertion port portion into which the lower edge of the barrel portion is fitted at the upper end and passes through the inside of the ring-shaped holder so as to be close to and away from the mandrel of the barrel delivery station. A hollow elevating stage that is moved up and down, and a clamping clamp that is provided inside the elevating stage and presses the lower edge portion of the body portion toward the inner peripheral surface of the fitting portion (Claim 6). ).

  If the body part is transferred from the body forming apparatus to the top curl forming apparatus by the above-described body part pushing-down apparatus and body part transferring apparatus, the deformation and damage of the body part due to the delivery can be effectively performed. Can be suppressed. In particular, if the trunk part pressing device has a pressing claw part, the pressing force at the time of depression is applied in the direction intersecting the inner peripheral surface of the upper edge part of the trunk part. No buckling or deformation at the upper edge. Moreover, if the trunk | drum transfer apparatus has a raising / lowering stage and a clamping clamp, buckling and a deformation | transformation of the lower edge part of a trunk | drum accompanying delivery will be prevented effectively.

Further, in the cup-shaped paper container molding machine of the above aspect (claim 3) according to the present invention, the body part forming device is moved along the mandrel length direction so that the body part can be pushed down from the mandrel at the body part feeding station. And a barrel transfer device that transfers the barrel pushed down from the mandrel to the holder while being sucked and held by the suction means at the barrel receiving station of the top curl molding apparatus. In some cases (Claim 7).
In this case, it is preferable that the trunk portion pressing device has a pressing claw portion having a wedge-shaped cross section inserted between the inner peripheral surface of the upper edge portion of the trunk portion and the surface of the mandrel (Claim 8). The barrel transfer device has a recess in which the lower edge of the barrel is fitted on the upper surface and moves up and down through the inside of the ring-shaped holder so as to be close to and away from the mandrel of the barrel delivery station. A vacuum suction port for sucking and holding the lower edge portion of the body portion is opened on the inner peripheral surface of the recess of the lift stage (claim 9).

  Also by the trunk | drum lowering apparatus and trunk | drum transfer apparatus as mentioned above, the deformation | transformation and damage of a trunk | drum accompanying the delivery from a trunk | drum shaping | molding apparatus to a top curl shaping | molding apparatus can be suppressed effectively. Moreover, if the trunk | drum lowering apparatus has a press nail | claw part, a buckling and a deformation | transformation will not occur in the upper edge part of a trunk | drum with delivery similarly to the above. Furthermore, if the trunk transfer device is configured with an elevating stage having a vacuum suction port, buckling and deformation of the lower edge of the trunk due to delivery can be effectively prevented, and timing of delivery of the trunk The adjustment becomes easier.

  In the cup-shaped paper container molding machine of the above basic form according to the present invention (Claim 2), at least one curl molding station is included in the plurality of processing stations of the top curl molding apparatus, and the curl molding station includes a ring. An inner holding die that is fitted into the inside of the body portion accommodated in the cylindrical holder from above and an outer holding die that is fitted onto the outside of the body portion accommodated in the holder from the lower side are provided. In some cases, curling is performed on the upper edge portion of the body portion by the curl forming die while the body portion is sandwiched between the die and the outer holding die.

  In the curl forming station of the top curl forming device, if the upper edge part of the body part is curled by the curl forming die while the body part is sandwiched between the inner holding die and the outer holding die as described above, curl forming In this case, it is possible to effectively prevent the body from buckling.

  Further, in the cup-shaped paper container molding machine according to the above-described basic form (claim 2) according to the present invention, at least one heating station is included in the plurality of processing stations of the top curl molding apparatus, and the heating station includes a ring. Having a lower opening recess which is disposed at a predetermined distance above the body portion accommodated in the cylindrical holder and can accommodate the upper edge of the body portion, and a heated air outlet on the inner peripheral surface of the lower opening recess A heating unit in which the upper part of the heating unit is pushed up to a position where the upper edge part is housed in the lower opening recess of the heating unit while sucking and holding the body part housed in the holder by suction means; It is preferable that a pressing portion that is brought into contact with the upper edge portion of the trunk portion is provided in the lower opening recess of the heating unit (claim 11).

  In the heating station of the top curl molding device, if the pressing part is provided in the lower opening recess of the heating unit as described above, the body part is lifted by the blown-out heated air, and the suction means of the body part lifting device functions. It is possible to surely avoid the situation of not doing so.

It is a top view which shows the outline of the paper cup molding machine which concerns on embodiment of this invention. It is the same side view. It is a vertical sectional view which shows a blank supply apparatus and a part of trunk | drum shaping | molding apparatus. It is an arrow line view which follows the IV-IV line of FIG. It is a vertical sectional view which expands and shows a part of blank supply device. It is a vertical sectional view which expands and shows other part of a blank supply device. FIG. 7 is a view showing a part of the body forming apparatus, and is a view taken along the line VII-VII in FIG. 3. FIG. 8 is an arrow view taken along line VIII-VIII in FIG. 7. It is a vertical sectional view showing a trunk sending station of the trunk forming apparatus and a trunk receiving station of the top curl molding apparatus. It is a vertical sectional view which expands and shows a trunk part pushing-down device of a trunk part forming device. It is a vertical sectional view which expands and shows a part of trunk section receiving station. It is a vertical sectional view showing a trunk receiving station. It is a vertical sectional view showing a lubrication application station of a top curl forming device. It is a vertical sectional view showing a pre-curl molding station of a top curl molding apparatus. It is a vertical sectional view which expands and shows a part of pre curl forming station. It is a vertical sectional view showing the heating station of the top curl molding apparatus. It is a vertical sectional view which expands and shows a part of heating station. It is a vertical sectional view showing a press molding station of a top curl molding apparatus. It is a vertical sectional view which expands and shows a part of press molding station. It is a vertical sectional view showing a body sending station with a top curl of a top curl forming apparatus and a body receiving station with a top curl of a bottom forming apparatus. It is a vertical sectional view showing a formed paper cup. In the paper cup molding machine concerning this embodiment of this invention, it is a vertical sectional view showing the modification of the trunk section receiving station of a top curl forming device. It is a top view which shows the outline of the conventional paper cup molding machine.

An embodiment of the present invention will be described below with reference to FIGS.
As shown in FIGS. 1 and 2, a paper cup molding machine (1) according to the present invention includes a blank feeding device (2), a barrel molding device (3), a top curl molding device (4), and a bottom molding device. (5). The molding of the paper cup (C) by the molding machine (1) is performed in the order in which the molding apparatuses (3), (4), and (5) are arranged, that is, the trunk molding process, the top curl molding process, and the bottom molding process. Is called.
The periphery of the molding machine (1) is covered with a cover panel (P).

(Blank feeder)
3 and 4 show the structure of the blank supply device (2). This apparatus (2) includes a blank stacker (21) for storing a plurality of body forming blanks (B1) in a stacked state, and take-out means (22) for taking out the blanks (B1) one by one from the blank stacker (21). ) And a transport unit (23) for transporting the extracted blank (B1) to the body forming device (3).
The body forming blank (B1) is a substantially fan-shaped belt formed by punching out a sheet in which a thermoplastic resin layer is laminated on at least one side of a paperboard, for example, and is formed on the cover panel (P). Then, a required number of sheets are supplied to the blank stacker (21) by the operator through the blank introduction port (P1).
The take-out means comprises a take-out arm (22) having a vacuum suction pad (221) at the tip and provided vertically movable below the blank stacker (21). The take-out arm (22) sucks and takes out the blank (B1) from the blank stacker (21) one by one through the bottom take-out port (211) one by one with the vacuum suction pad (221), and transports it to the transport unit (23). Place on the route.
The transport unit (23) is arranged on the rear side in the transport direction and transports the blank (B1) on the belt and transported between the belt conveyor (24) and on the front side in the transport direction and the blank (B1) between the upper and lower belts. The feed belt (25) is transported between the feed belt (25) and a feed arm (26) disposed near the front end of the feed belt (25) in the transport direction. In this embodiment, the blank conveyance path by the conveyance unit (23) extends obliquely upward toward the blank supply position of the body forming device (3) (see FIG. 2).
As shown in FIG. 4, the belt conveyor (24) has sprockets (242) attached to both ends of two horizontal rotating shafts (241) before and after the conveying direction. An endless belt (243) is wound around each of the sprockets (242) on both sides. The belts (243) on both sides are arranged in the space below the blank stacker (21) with the take-out arm (22) interposed therebetween.
The blank (B1) taken out from the blank stacker (21) by the take-out arm (22) is placed on the belt (243) on both sides of the belt conveyor (24).

As shown in detail in FIG. 5, on the surface of the belt (243), there are a plurality of engaging claws (244) having a substantially L-shaped cross section whose front ends are directed forward in the rotation direction at regular intervals in the belt length direction. Is provided. Then, the trailing edge of the blank (B1) in the conveyance direction is inserted into the locking groove (245) formed between the engagement claw portion (244) and the surface of the belt (243) and held in place. In this state, it is conveyed to the feed belt (25) . The front end portion of the engaging claw portion (244) is inclined on the surface side of the belt (243) so that the edge of the blank (B1) can be easily inserted into the locking groove (245). The bottom surface of the locking groove (245) is formed so as to be inclined with respect to the transport direction when viewed from the plane in accordance with the shape of the edge of the blank (B1) (see FIG. 4).
Here, as a conveying means from the blank stacker to the feed belt in the conventional blank feeding device, i) a small-diameter conveying roller unit is installed in the vicinity of the blank stacker, and as soon as the blank is taken out from the blank stacker, the conveying roller Ii) A blank feed outlet opened to the front in the conveying direction is provided at the bottom of the blank stacker, and the blank is pushed out from the blank delivery outlet by a feed claw disposed below the bottom, and fed to the feed belt. There was something to send. However, the means i) has a problem in that the position where the first roller in the transport roller unit holds the blank is not determined, and the blank position varies. Further, in the above means ii), since the vertical width of the blank delivery port is only about the thickness of one blank, for example, when the blank is warped, the blank may be caught on the edge of the blank delivery port and clogged. .
On the other hand, in the case of the blank supply device (2) of this embodiment, as described above, the blank (B1) taken out from the blank stacker (21) has a belt conveyor (24 ) Is inserted into the locking groove (245) between the surface of the belt (243) and the engaging claw portion (244) and is securely held, and in this state, is fed to the feed belt (25). And the problem which has arisen when using the conveying means of ii) is avoided.

In addition, in the blank supply device (2) of this embodiment, a blank positioning stopper (29) is provided at a blank transfer position from the belt conveyor (24) to the feed belt (25) (FIGS. 3 and 4). The stopper (29) is provided on the front side in the transport direction of the belt (243) on both sides of the belt conveyor (24). These stoppers (29) are attached to the tip of a swing arm (not shown), and the swing arm can be swung up and down so that the stopper (29) can freely move in and out on the transport path of the blank (B1). Yes. As shown in FIG. 4, each stopper (29) has a substantially L shape with its tip bent backward in the transport direction as seen from the plane. The front end surface of the stopper (29) is cut obliquely along the front edge of the blank (B1).
When the blank (B1) is inserted into the locking groove (245) and sent forward, the tip end surface of the stopper (29) raised to the height of the conveyance path by the swing of the swing arm is the blank ( After being momentarily brought into contact with the front edge of B1), the stopper (29) is retracted from the transport path by swinging the swinging arm downward, and the blank (B1) maintains its proper posture. In this state, it is taken up by the feed belt (25).
That is, according to the blank supply device of this embodiment, the blank (B1) is sandwiched between the two locking grooves (245) and the two stoppers (29), and thereby the inclination of the blank (B1) with respect to the transport direction is increased. Since the correction is made, variation in the posture of the blank (B1) during conveyance can be eliminated.

A pair of upper and lower feed belts (25) are respectively attached to the sprockets (252) attached to both ends of a plurality of horizontal rotating shafts (251) extending in the direction perpendicular to the conveying direction and to the sprockets (252) on both sides. And two endless belts (253) wound around the belt. The two belts (253) on both sides are arranged at a narrow interval so as to fit between the two belts (243) of the belt conveyor (24) (see FIG. 4). Therefore, the blank (B1) is transported in a state where both end portions thereof protrude outside the two belts (253).
The upper and lower feed belts (25) are arranged at an interval of about the thickness of one blank (B1) and are rotated in opposite directions. The blank (B1) conveyed by the conveyor belt (24) is sandwiched between the upper and lower feed belts (25) and is conveyed between the two feed belts (25) as the belt (253) rotates.

A side heater (27) is provided on one of the outer sides of the rear part of the feed belt (25) in the conveying direction, and a crease (28) is provided on the other. Further, side heaters (27) are also provided on both outer sides of the front portion of the feed belt (25) in the conveying direction.
The side heater (27) includes an upward heated air outlet (not shown) and a fin member (271) disposed between the heated air outlet and the end of the blank (B1). The heated air thus passed passes between the plurality of fins of the fin member (271) and hits the end of the blank (B1), whereby the thermoplastic resin layer at the end of the blank (B1) is heated and melted.
The creaser (28) is for making a crease at one end of the blank (B1). By pre-creasing the same part, it is possible to prevent the ends of the blank (B1) from interfering when the blank (B1) is wound around the mandrel (31) in the body forming device (3) described later. The blank (B1) is smoothly wound.

The delivery arm (26) is provided close to the outside of the two belts (253) of the lower feed belt (25). These delivery arms (26) swing along the conveyance direction around a common horizontal axis (260) arranged perpendicular to the conveyance direction below the front end of the lower feed belt (25) in the conveyance direction. Be moved.
The distal end of the delivery arm (26) is bent in a bowl shape toward the front in the transport direction, and a delivery claw (261) is attached thereto.
As shown in detail in FIG. 6, the delivery claw (261) has a base end portion pivotally attached to the upper surface side of the distal end portion of the delivery arm (26) and can swing a predetermined angle in the vertical direction. The urging means (not shown) is urged toward the upper surface side of the distal end portion of the delivery arm (26). The front end surface of the delivery claw (261) is recessed in a substantially V-shaped cross section so that the trailing edge of the blank (B1) in the conveyance direction can be easily captured.
According to the above configuration, the blank (B1) is accurately delivered by the delivery arm (26), and the blank (B1) is effectively prevented from buckling and deforming due to the applied pressure during delivery. .

(Body forming device)
As shown in FIGS. 1 and 2, the body forming device (3) has a plurality of body forming mandrels (31) provided radially at equal intervals in the circumferential direction and rotated about a horizontal axis. It has a turret (30).
A plurality of substantially cylindrical mounting shafts (301) extending radially outward are provided at equal intervals in the circumferential direction on the outer peripheral portion of the turret (30).
The mandrel (31) has a truncated conical shape, and is attached to the tip of each attachment shaft (301) so that the smaller diameter side is the tip. In the case of the illustrated turret (30), a total of eight mandrels (31) are provided at 45 ° intervals.
The turret (30) is rotated intermittently in the direction indicated by the arrow (A) in FIG. More specifically, the turret (30) is rotated so that the mandrel (31) stops at a constant time at a total of eight turning positions shown in FIG.

The blank supply position to the body forming device (3) is provided close to the front side in the turning direction of the mandrel (31) at the lower right position in FIG. The above-mentioned position of the mandrel (31) is used as a first station (S31) for forming the body (C1).
A blank holder (32) is provided at the blank supply position. The blank holder (32) includes a pair of holder members (320) disposed on both sides of the blank turning path. Each holder member (320) includes an upper plate (321), a block-shaped positioning stopper (322) provided on the front side of the blank on the lower surface of the upper plate (321), and a lower portion of the upper plate (321). A lower bar (323) disposed at a predetermined interval and having a plurality of air outlets (323a) on the upper surface, and a blank (B1) between the upper plate (321) and the lower bar (323) The blank (B1) is pressed against the lower surface of the upper plate (321) by the air blown out from the air blowing port (323a) of the lower bar (323). The rear surface of the stopper (322) in the blank supply direction is formed so as to be inclined when viewed from the plane (direction of FIG. 4) along the front edge of the blank (B1). The blank (B1) fed to the blank feeding position by the feeding arm (26) of the blank feeding device (2) is an upper plate (321) at both ends of the pair of holder members (320) of the blank holder (32). And the lower bar (323), and is received by the stopper (322), and is held at that position by being pressed from behind by the delivery claw (261) of the delivery arm (26). Further, the blank (B1) is pressed against the lower surface of the upper plate (321) by the air blown from the air blowing port (323a) of the lower bar (323). Therefore, as described later, when the blank (B1) is wound around the mandrel (31), there is no possibility that the blank (B1) is displaced due to the impact.

Between the blank holder (32) and the second station (S32) provided at the right position in FIG. 2 where the mandrel (31) is stopped next, guide bars ( 33) is provided. Brushes (331) are planted on the opposing surfaces of the guide bars (33) on both sides so that a part thereof protrudes on the mandrel turning path. Two guide bars (33) are provided on both sides of the mandrel swivel path, with two spaced apart from each other on the distal end side and the proximal end side of the mandrel (31). The front end of the mandrel (31) guide bar (33) ends before the mandrel (31) of the second station (S32), but the mandrel (31) proximal end guide bar (33) The front end reaches the side of the mandrel (31) of the second station (S32) and is slightly longer than the former.
When the mandrel (31) is swung from the first station (S31) to the second station (S32), the blank (B1) is taken out from the blank holder (32) and the blank (B1) is moved to the guide bar (33). ) And is wound around the surface of the mandrel (31) in a substantially U shape.

As shown in detail in FIGS. 7 and 8, the second station (S32) has two winding claws (34) for completely winding the blank (B1) until both ends thereof overlap each other on the surface of the mandrel (31). Is provided.
The two winding claws (34) are arranged so that the base end portion is rotatably attached to a common support shaft (341) and surrounds the mandrel (31) stopped at the second station (S32). The two arms (342) are attached to the front ends of the arms so as to face each other. Each of the two arms (342) includes three links (343), (344), and (345), and can be swung in the left-right direction in FIGS. Each winding claw (34) has a U-shape with a bifurcated tip to avoid interference with the mandrel (31) proximal guide bar (33). When the arm (342) is swung in a direction approaching each other, the leading end of the winding claw (34) is moved along the surface of the mandrel (31), thereby causing both ends of the blank (B1) to move. Wrap around the surface of the mandrel (31) and overlap each other. Since the thermoplastic resin layers at both ends of the blank (B1) are preheated by the side heater (27) in the blank supply device (2), they are superposed on each other on the surface of the mandrel (31). The both ends of the blank (B1) are heat sealed. In this manner, a tapered cylindrical body (C1) corresponding to the surface shape of the mandrel (31) is formed from the blank (B1).

  Although not shown, a seam clamp is provided so as to be positioned on the front side in the turning direction of each mandrel (31). Each seam clamp is provided at the tip of a swing arm (not shown) extending from the turret (30) along the front side of the mounting shaft (301) in the turning direction, and can be pressed and separated from the mandrel (31). ing. By this seam clamp, the seam portion of the body portion (C1) formed in the second station (S32), that is, both ends joined to each other of the blank (B1) are pressed toward the surface of the mandrel (31). It has been.

The molded body (C1) is transported to the lower position in FIG. 2, that is, the lower end of the mandrel swivel path while being mounted on the mandrel (31). Sent to 4). That is, the lower position in FIG. 2 is the trunk sending station (S33). The seam clamp is separated from the seam portion of the trunk portion (C1) before the mandrel (31) comes to the trunk feeding station (S33).
As shown in FIG. 9, the body forming device (3) is arranged along the length direction of the mandrel (31) so that the body part (C1) can be pushed down from the mandrel (31) in the body part sending station (S33). A body push-down device (35) to be moved is provided.
The trunk portion pressing device includes a pressing sleeve (35) provided around each attachment shaft (301) of the turret (30) so as to be able to advance and retract along its length direction.
As shown in detail in FIG. 10, a pressing claw portion (351) having a wedge-shaped cross section is provided at the distal end portion of the pressing sleeve (35). The pressing claw portion (351) is inserted between the inner peripheral surface of the upper edge portion of the trunk portion (C1) and the surface of the mandrel (31), so that the pressing force at the time of depression is applied to the upper portion of the trunk portion (C1). Since it is made to act in the direction crossing the inner peripheral surface of the edge, buckling or deformation does not occur at the upper edge of the trunk (C1).
It should be noted that the stroke amount of the push-down sleeve (35) is sufficient such that the lower edge portion of the body portion (C1) is detached from the mandrel (31) and protrudes downward.

(Top curl molding equipment)
As shown in FIGS. 1 and 2, the top curl forming apparatus (4) has a table (40) rotated around a vertical axis. On the outer periphery of the table (40), a plurality of holders (41) capable of accommodating the body (C1) are provided at equal intervals in the circumferential direction. In the illustrated apparatus (4), ten holders (41) are provided on the outer periphery of the table (40) at intervals of 36 °.
The holder (41) is a ring-shaped one having a tapered inner peripheral surface (411) capable of holding the height intermediate portion of the outer peripheral surface of the trunk portion (C1), and the like on the outer peripheral portion of the table (40). It fixes to the upper edge part of the some through-hole (401) opened at intervals (refer FIG. 9, FIG. 12, etc.).
The table (40) is rotated intermittently in the direction indicated by the arrow (B) in FIG. More specifically, the table (40) is rotated so that the holder (41) stops at predetermined time intervals in a total of ten turning positions shown in FIG.
The table (40) has a barrel forming device (40) so that the holder (41) at a predetermined turning position (right position in FIG. 1) is directly below the barrel feeding station (S33) of the barrel forming device (3). It is located under the turret (30) of 3). A barrel receiving station (S41) is provided at the holder turning position.
A plurality of processing stations are provided on the holder turning path subsequent to the trunk receiving station (S41). The body (C1) held by the holder (41) is sequentially sent to the processing stations as the table (40) rotates, and the upper edge of the body (C1) is top-curled at these stations.
The processing station comprises a lubrication coating station (S42), a precurl molding station (S43), first and second heating stations (S44) (S45), a finish curl molding station (S46), and a press molding station (S47).
Between the press forming station (S47), which is the final processing station, and the body receiving station (S41), a body sending station (S48) with a top curl is provided.

9 and 12 show the state of the trunk receiving station (S41).
In this station (S41), the body (C1) pushed down by the body push-down sleeve (35) from the mandrel (31) is transferred to the holder (41) while being sandwiched in the body thickness direction by the sandwiching means. A trunk part transfer device (42) is provided. The trunk part transfer device (42) includes an elevating stage (42a) and a clamping clamp (42b).
The elevating stage (42a) is a hollow one having an insertion port portion (421) into which the lower edge portion of the trunk portion (C1) is fitted, and a mandrel of the trunk portion sending station (S33). It is raised and lowered through the inside of the holder (41) so that it can approach and separate from (31). The upper part of the elevating stage (42a) has a vertical cylindrical shape. The insertion port portion (421) includes a horizontal annular step (422) that can receive the lower end surface of the trunk portion (C1), and a tapered inner circumferential surface (423) that runs along the outer peripheral surface of the lower edge portion of the trunk portion (C1). And have. The lower part of the elevating stage (42a) has a hollow shape that communicates with the inside of the upper part and opens on both sides. The upper end of the lifting rod (424) is connected to the bottom wall of the lifting stage (42a). A flange (425) is provided at an intermediate portion of the length of the elevating rod (424). A slider (426) is fitted around the upper end of the lifting rod (424). The slider (426) is movable up and down between the flange (425) and the bottom wall of the elevating stage (42a), and is urged downward by a spring (427).
Two clamping clamps (42b) are provided in a substantially L shape, and the vicinity of the middle bent portion is swingably attached to the inner surface of the lower part of the elevating stage (42a) by a horizontal shaft. As shown in detail in FIG. 11, the upper ends of the two clamping clamps (42b) are bent in an L shape so as to face opposite directions. Further, the front end surfaces of both clamps (42b) are cut obliquely along the inner peripheral surface of the lower edge portion of the body portion (C1). The lower ends of both clamps (42b) are disposed outside the elevating stage (42a) through the side openings and are connected to the slider (426) via the link (428). The slider (426) is connected to the upper end of a second lifting rod (429) extending in parallel with the lifting rod (424).

The delivery process of the trunk part (C1) at the trunk part receiving station (S41) is performed, for example, as follows.
That is, first, as shown in FIG. 9, the body part (C1) mounted on the mandrel (31) is pushed down by the body part push-down sleeve (35) in the body part delivery station (S33). At the same time, in the trunk receiving station (S41), the elevating stage (42a) is raised through the inside of the holder (41) and approaches the mandrel (31). And the lower edge part of the trunk | drum (C1) removed from the mandrel (31) is inserted in the insertion part (421) of the raising / lowering stage (42a). In this state, the body part (C1) is sandwiched from above and below by the body part pressing sleeve (35) and the elevating stage (42a). Next, by lowering the second lifting rod (429), the two clamping clamps (42b) are swung away from each other, and the front ends of both clamps (42b) are connected to the inner periphery of the lower edge of the trunk (C1). Press against the surface. Thus, the lower edge portion of the trunk portion (C1) is clamped in the thickness direction of the trunk portion (C1) by the inner peripheral surface (423) of the fitting portion (421) and the tip end portion of the clamping clamp (42b). The
Then, as shown in FIG. 12, when the elevating stage (42a) is lowered by a predetermined distance while maintaining the state in which the lower edge of the body (C1) is held by the clamp (42b), the body (C1) Is accommodated in the holder (41), and the height intermediate portion of the outer peripheral surface thereof is held by the inner peripheral surface (411) of the holder (41). Next, when the clamping clamp (42b) is swung as shown by a two-dot chain line in FIG. 12, the clamping state of the lower edge of the trunk (C1) is released, so that the lifting stage (42a) is moved to the standby position. To lower.

FIG. 13 shows details of the lubricant coating station (S42).
In this station (S42), a lubricant coating device (43) disposed at a predetermined distance above the barrel (C1) held by the holder (41), and a barrel (C1) are connected to the lubricant coating device ( 43) and a push-up device (44) for pushing up toward 43).
Lubricant coating device (43) includes a base (431) having a vertical center hole, an operating shaft (432) passed through the center hole so as to be movable up and down, and a lower end portion of the operating shaft (432) protruding from the center hole. And a slider (433) supported by the base (431) so as to be movable in the circumferential direction and being movable in the radial direction of the operating shaft (432), and the radial direction of each slider (433) And a lubricant absorber (434) provided at the outer end.
The lower end portion of the operating shaft (432) has a truncated conical shape having a large diameter on the tip side, and the peripheral surface thereof constitutes a cam surface (432a).
Each slider (433) is supported by a base (431) so as to be movable in a radial direction via a support member (not shown) and is urged radially inward by a biasing means such as a spring (not shown). ing. A tapered cam surface (433a) that is brought into sliding contact with the cam surface (432a) of the operating shaft (432) is formed on the radially inner end surface of the slider (433). The lubricant absorber (434) is made of a restoring material capable of impregnating and holding the lubricant, such as sponge, and is fixed to the end surface on the radially outer side of the slider (433). A passage (435) for supplying the lubricant to the lubricant absorber (434) is formed in the operation shaft (432) and the base (431). An annular receiving member (436) for receiving the upper edge portion of the body portion (C1) is provided on the outer peripheral portion of the lower surface of the base (431). The receiving member (436) is attached to the lower surface of the base (431) via a spring (not shown) so as to relieve the pressure applied to the upper edge of the body (C1) brought into contact with the receiving member (436). It is preferred that
The push-up device (44) has a push-up rod (441) and a recess (443) on the upper surface that can accommodate and hold the lower edge of the trunk (C1) and is attached to the upper end of the push-up rod (441). And a holding base (442). The inner peripheral surface of the recess (443) is a tapered surface along the outer peripheral surface of the trunk (C1). An annular groove (444) into which the lower edge portion of the trunk portion (C1) is fitted is formed in the peripheral portion of the bottom surface of the recess (443). A vacuum suction port (445) is opened on the inner peripheral surface of the recess (443).

The lubricant coating process is performed as follows. That is, first, when the push-up rod (441) of the push-up device (44) is raised toward the barrel (C1) held by the holder (41), the drum is placed in the annular groove (444) on the upper surface of the holding base (442). The lower edge portion of the portion (C1) is fitted, and the lower edge portion of the trunk portion (C1) is sucked and held. When the push-up rod (441) further rises, the upper edge portion of the trunk portion (C1) comes into contact with the receiving member (436) and is stopped here.
Next, when the operating shaft (432) of the lubricant application device (43) is raised, the slider (433) is moved radially outward by the sliding contact between the cam surfaces (432a) and (433a). As a result, the lubricant absorbent (434) is pressed against the inner peripheral surface of the upper edge portion of the trunk portion (C1), and the lubricant is applied to the same surface. By applying the lubricant, the frictional resistance between the upper edge portion of the trunk portion (C1) and the curl molding die during curl molding is reduced.
When application of the lubricant is completed, the operating shaft (432) is lowered to move the slider (433) radially inward, and then the push-up rod (441) is lowered. Thereby, the trunk | drum (C1) is again hold | maintained at a holder (41).

FIG. 14 shows details of the precurl molding station (S43).
In this station (S43), there are an inner holding die (45A) that is fitted from above into the barrel (C1) held by the holder (41), and a lower portion at the barrel (C1) held by the holder (41). An outer holding die (45B) to be fitted from above and a curl forming die (45C) are provided.
The upper part of the inner holding die (45A) has a cylindrical shape, and the remaining part has a truncated cone shape with a small diameter on the tip side. A recess (451) is formed in the lower surface of the inner holding die (45A).
The outer holding die (45B) is an upper die (452) that holds the upper portion of the outer peripheral surface of the body (C1) located below the holder (41), and a lower die that holds the lower portion ( 453). Although not shown, the upper die (452) and the lower die (453) are integrated and can be lifted and lowered simultaneously by one lifting means. The upper die (452) is a ring-shaped member having a tapered inner peripheral surface (452a) along the outer peripheral surface of the trunk portion (C1). A vacuum suction port (454) is opened on the inner peripheral surface (452a) of the upper die (452). The lower die (453) is a plate having a recess (455) with a circular cross section on the upper surface. The inner peripheral surface (455a) of the recess (455) is a tapered surface along the outer peripheral surface of the trunk portion (C1). An annular groove (455b) into which the lower edge portion of the body portion (C1) is fitted is formed in the peripheral portion of the bottom surface of the recess (455). A vacuum suction port (455c) is opened on the inner peripheral surface of the recess (455). A gap is provided between the upper die (452) and the lower die (453).
The curl forming die (45C) has a plate-like shape having a vertical through hole (456) in the center, and is fitted up and down around the cylindrical upper portion of the inner holding die (45A). An annular pressing claw portion (457) is formed downward on the inner peripheral portion of the lower surface of the curl forming die (45C). The inner peripheral surface of the pressing claw portion (457) constitutes a part of the vertical through hole (456). As shown in detail in FIG. 15, the outer peripheral surface of the pressing claw portion (457) is tapered, and functions as a pressing surface (457a) that pushes the upper edge of the body portion (C1) outward during curl molding. To do. An annular guide groove (458) is formed on the lower surface of the curl forming die (45C) adjacent to the outside of the pressing claw portion (457). The inner peripheral surface of the guide groove (458) is tapered to be continuous with the outer peripheral surface (457a) of the pressing claw portion (457). The bottom of the guide groove (458) is rounded. The guide groove (458) functions as a guide surface for folding the upper edge portion of the body portion (C1) downward toward the outside during curl molding.
An annular upper convex portion (412) is formed on the inner peripheral portion of the holder (41). An annular guide groove (413) is formed in the upper convex part (412) at a position facing the guide groove (458) of the curl forming die (45C) vertically. This guide groove (413) functions as a guide surface for turning the upper edge part of the body part (C1) folded downward by the guide groove (458) of the curl forming die (45C) upwards inward. To do.

  The precurl molding process is performed as follows. That is, when the barrel (C1) held by the holder (41) comes to the precurl molding station (S43), the inner holding die (45A) is lowered and fitted into the barrel (C1) from above, The outer holding die (45B) is raised and fitted onto the lower part of the body part (C1) from below, and the lower part of the body part (C1) is sucked and held. In the case of precurl molding, the body (C1) is pushed up by the outer holding die (45B) to a position where it is slightly lifted from the holder (41). Then, with the barrel (C1) held between these holding dies (45A) and (45B), when the curl molding die (45C) is lowered by a predetermined distance, the upper edge of the barrel (C1) is It is spread outward by the pressing surface (457a) of the pressing claw portion (457), and then folded back downward by being guided by the guide groove (458).

14 and 15 show the pre-curl molding station (S43), but the finish curl molding station (S46) that follows through the first and second heating stations (S44) (S45) The apparatus configuration and process are substantially the same as those of the precurl molding station (S43).
In the finish curl forming process performed at this station (S46), the curl forming die (45C) is lowered to a lower position, and the upper edge of the precurled body (C1) is It is guided by the guide groove (413) of 41) and the guide groove (458) of the curl forming die (45C), and is further curled so as to wind.

FIG. 16 shows the details of the heating station (S44). In addition, although two heating stations are provided in total, since both have substantially the same configuration, one of them will be illustrated and described below.
The heating station (S44) is provided with a heating unit (46) and a trunk portion lifting device (44).
The heating unit (46) is in the form of a block arranged at a predetermined distance above the trunk (C1) accommodated in the holder (41). The heating unit (46) is formed with a lower opening recess (461) having a circular cross section that can accommodate the upper edge of the body (C1). A heated air outlet (462) is opened near the lower edge of the inner peripheral surface of the lower opening recess (461). This heating unit (46) is fixedly provided at such a height that it does not come into contact with the holder (41) when the body (C1) held by the holder (41) turns.
The body push-up device (44) has a push-up rod (441) and a recess (443) that can accommodate and hold the lower edge of the body (C1) on the upper surface, and the upper end of the push-up rod (441). And an attached holding base (442A). The inner peripheral surface of the recess (443) of the holding base (442A) is a tapered surface that follows the outer peripheral surface of the trunk portion (C1). An annular groove (444) into which the lower edge portion of the trunk portion is fitted is formed at the peripheral portion of the bottom surface of the recess (443). A vacuum suction port (445) is opened on the inner peripheral surface of the recess (443).
The lower opening recess (461) of the heating unit (46) is pressed down to be brought into contact with the upper edge of the body (C1) so as to prevent the body (C1) from being lifted by blown heated air. A portion (463) is provided. The pressing portion includes a pressing plate (463) attached to the bottom surface of the lower opening recess (461) via a spacer (464). The pressing plate (463) has a step in the vicinity of the outer peripheral edge portion of the lower surface thereof, and the outer peripheral edge portion (463a) outside the step is positioned above the other portion. The upper edge of the body (C1) is brought into contact with the body.

When the barrel (C1) held by the holder (41) comes to the heating station (S44), the push-up rod (441) of the push-up device (44) rises, and the recess (443) of the holding base (442A) The lower edge portion of the body portion (C1) is fitted into the body, and the lower edge portion of the body portion (C1) is sucked and held.
When the push-up rod (441) is further raised in this state, the upper edge of the body (C1) is accommodated in the lower opening recess (461) of the heating unit (46) and faces the heated air outlet (462). I can.
Then, heated air is blown out from the heated air outlet (462), and the upper edge portion of the trunk portion (C1) is heated. At this time, as shown in detail in FIG. 17, the upper edge portion of the trunk portion (C1) is brought into contact with the outer peripheral edge portion (463a) of the lower surface of the pressing plate (463), whereby the trunk portion due to the blown-out heated air. (C1) lift is prevented.
In the first and second heating stations (S44) and (S45), the amount of push-up of the body (C1) and the heated air are blown to different heights on the upper edge of the body (C1). The mounting position of the pressing plate (463) is appropriately changed.

18 and 19 show details of the press forming station (S47).
In this station (S47), a fixed distance is placed above the trunk (C1) held by the holder (41) at a predetermined distance, and the curled upper edge of the trunk (C1) is placed on the lower surface. A press female die (47) having an annular groove (471) that can be accommodated, and a push-up device (44) for pushing up the body (C1) held by the holder (41) toward the upper press female die (47); A press male die (48) that presses the curled upper edge portion of the body (C1) accommodated in the press female die (47) from below is provided.
On the lower surface of the press female die (47), a frustoconical downward convex part (472) is formed on the inner part of the annular groove (471) and fitted into the upper half of the body part (C1). . The lower end of the vertical fixing rod (473) is connected to the center of the upper surface of the press female die (47).
The push-up device (44) has a push-up rod (441) and a fitting inlet (443) into which the lower edge of the body (C1) is fitted at the upper end, and is attached to the upper end of the push-up rod (441). And a holding base (442B). The upper part of the holding table (442B) has a vertical cylindrical shape. The fitting part (443) has a horizontal annular step (444) on which the lower end surface of the body part (C1) is received, and a tapered inner peripheral surface (443a) along the outer peripheral surface of the lower edge part of the body part (C1). And have. A vacuum suction port (445) is opened on the inner peripheral surface (443a). The lower part of the holding table (442B) is formed in a hollow shape that communicates with the inside of the upper part and opens on both sides. The upper end of the push-up rod (441) is connected to the bottom wall of the holding base (442B). Further, a holding clamp (446) is incorporated in the holding base (442B). Two clamping clamps (446) are provided in a substantially L shape, and the vicinity of the middle bent portion is swingably attached to the inner surface of the lower part of the holding table (442B) by a horizontal shaft. The upper ends of the two clamping clamps (446) are bent in an L shape so as to face opposite directions. Moreover, the front end surfaces of the upper ends of both clamps (446) are obliquely cut along the inner peripheral surface of the lower edge portion of the body portion (C1). Both clamps (446) are in the direction in which the upper ends are separated from each other by the compression spring (447) interposed between the clamps (446) at a position slightly above the horizontal axis. (C1) is urged in a direction to be pressed against the inner peripheral surface of the lower edge. The lower ends of both clamps (446) are disposed outside the holding table (442B) through the side openings. Cam rollers (448) are rotatably attached to lower ends of both clamps (446). Cams (449) having cam surfaces that come into contact with the cam rollers (448) are provided on both sides of the push-up rod (441). When the push-up device (44) is in the standby position below the body (C1) held by the holder (41), the two rollers (448) are cams (449) as shown by a two-dot chain line in FIG. The two clamps (446) are in a non-clamping position where the upper ends approach each other against the spring force of the compression spring (447).
The press male die (48) is composed of four dice divided bodies (480) arranged so as to divide the periphery of the press female die (47) into four equal parts. These die division bodies (480) are held movably in the radial direction of the press female die (47) at the lower end portion of the die holder (481) supported so as to be movable up and down by the vertical fixing rod (473). The radially inner portion of the die division body (480) is bent in an L shape with the tip (480b) facing upward so as to enter the annular groove (471) of the press female die (47). The die holder (481) includes a horizontal plate portion (481a) having a central hole through which the vertical fixing rod (473) is inserted, and four hanging plate portions extending downward from front, rear, left and right edges of the horizontal plate portion (481a). 481b). The die division body (480) is held at the lower end of each hanging plate (481b). A cam surface (480a) made of an inclined surface that is inclined upward is provided at the radially outer end of the die division body (480). Although not shown, each of the dice divided bodies (480) is urged outward in the radial direction by an urging means such as a spring.
An operation plate (482) for sliding the die division bodies (480) in the radial direction is disposed outside each die division body (480). These actuating plates (482) are suspended from the edge of a horizontal plate-like plate holder (483) supported by the vertical fixing rod (473) so as to be movable up and down above the die holder (481). A cam surface (482a) is formed at the lower end of each actuating plate (482). The cam surface (482a) is made of a downward inclined surface and is brought into sliding contact with the cam surface (480a) of the dice divided body (480).

When the barrel (C1) held by the holder (41) comes to the press molding station (S47), the push-up rod (441) of the push-up device (44) is lifted, and the fitting portion ( 443) receives the lower edge portion of the body portion (C1) by the horizontal annular step (444) and sucks and holds the lower edge portion of the body portion (C1) through the vacuum suction port (445). When the push-up rod (441) continues to rise, the cam roller (448) rolls upward on the upper taper portion of the cam surface of the cam (449), thereby causing both clamps (446) to swing, The tip of the clamp (446) is pressed against the inner peripheral surface of the lower edge of the body (C1). Thus, the lower edge portion of the trunk portion (C1) is sandwiched in the thickness direction of the trunk portion (C1) by the inner peripheral surface (443a) of the insertion port portion (443) and the distal end portion of the clamping clamp (446). The When the push-up rod (441) is further raised, the curled upper edge portion of the body portion (C1) is fitted into the annular groove (471) of the press female die (47). At this time, the die division body (480) and the actuating plate (482) of the press male die (48) are at the positions indicated by the two-dot chain lines in FIGS.
Next, when the plate holder (483) is lowered, each operating plate (482) is lowered and its cam surface (482a) is brought into sliding contact with the cam surface (480a) of the dice divided body (480). The die division body (480) moves inward in the radial direction, and the tip end portion (480b) of the die division body (480) is disposed immediately below the annular groove (471) of the press female die (47).
When the die holder (481) is raised in this state, each of the dice divided bodies (480) is raised, and the top edge (480b) of the die portion (480b) presses the curled upper edge portion of the body portion (C1) from below. As a result, the top edge (C2) of the body part (C1) is press-molded and the top curl (C2) is formed.

As shown in FIG. 20, in the body sending station (S48) with the top curl, the body (C1) (intermediate molded body) with the top curl (C2) held by the holder (41) is pushed upward. A push-up device (44) is provided.
The push-up device (44) has a push-up rod (441) and an annular groove (444) into which the lower edge portion of the body portion (C1) with a top curl (C2) is fitted in the peripheral portion of the upper surface, and the push-up rod ( 441) and a holding base (442C) attached to the upper end portion. The holding base (442C) has an outer diameter smaller than the minimum inner diameter of the holder (41) so that the whole of the holding base (442C) can pass to the upper side of the holder (41) through the inside of the holder (41). Yes.

(Bottom molding equipment)
As shown in FIGS. 1 and 2, the bottom molding apparatus (5) includes a table (50) having a plurality of body molding mandrels (51) provided at equal intervals in the circumferential direction and rotated about a vertical axis. )have.
On the outer periphery of the lower surface of the table (50), a plurality of substantially short cylindrical mounting shafts (501) extending vertically downward are provided at equal intervals in the circumferential direction, and are attached to the lower end of each mounting shaft (501). Continuously, a truncated conical mandrel (51) having a small diameter at the tip end side is provided. In the case of the illustrated table (50), a total of 12 mandrels (51) are provided at 30 ° intervals. A lower opening recess (511) that can accommodate the bottom plate (B2) is formed on the front end surface of the mandrel (51) (see FIG. 20). Although not shown, a vacuum suction port for sucking and holding the bottom plate (B2) is opened at the bottom surface of the lower opening recess (511). Also. A vacuum suction port (not shown) for sucking and holding the body portion (C1) with the top curl (C2) is also opened on the peripheral surface of the mandrel (51).
The table is intermittently rotated in the direction indicated by the arrow (C) in FIG. More specifically, the table (50) is rotated so that the mandrel (51) stops at predetermined time intervals in a total of twelve turning positions shown in FIG.
Further, the table (50) is located on the upper side of the table (40) of the top curl molding device (4) so that the table (40) of the top curl molding device (4) and a part of the outer peripheral portion overlap each other when viewed from above. Is arranged. More precisely, the table (50) is arranged such that a predetermined mandrel turning position is located directly below the top curled body feeding station (S48) of the top curl forming device (4). A trunk receiving station (S51) with a top curl is provided at the mandrel turning position.

As shown in FIG. 20, the body receiving station (S51) with the top curl has guide brushes (52) along both sides of the transfer path of the body (C1) with the top curl (C2) by the push-up device (44). ) Is provided.
The body portion (C1) with the top curl (C2) that has come to the delivery station (S48) of the top curl forming device (4) is moved upwardly away from the holder (41) by the push-up device (44). While being guided by the hair tip portion of (52), it is accurately fitted to the mandrel (51) of the receiving station (S51) and sucked and held.

A plurality of processing stations are provided on the mandrel turning path, following the trunk receiving station with top curl (S51). The body (C1) with the top curl (C2) held by the mandrel (51) is sequentially sent to the processing stations as the table (50) rotates, and is joined to the bottom plate (B2) made of blanks at these stations. The
The processing station includes first to third heating stations (S52) (S53) (S54), a bottom curl molding station (S55), and first and second expansion molding stations (S56) (S57).
Furthermore, a container discharge station (S58) and a bottom plate receiving station (S59) are provided between the second expansion molding station (S57) and the barrel receiving station (S51) with a top curl.
In the case of the bottom forming device (5) of this embodiment, the bottom plate (B2) is formed on the bottom plate so as to partially overlap the table (50) of the bottom forming device (5) when seen from the plane. In the table (6), the tape-shaped blank sheet (B20) supplied by the blank supply means is punched into a circle and pressed so that the peripheral edge is bent downward. The molded bottom plate (B2) is transferred to the mandrel (51) coming to the bottom plate receiving station (S59), is received in the lower opening recess (511), and is held by the vacuum suction means. Note that, as in the conventional apparatus shown in FIG. 23 , a bottom plate molding station may be incorporated in the bottom molding apparatus.
The configuration of each processing station (S52) (S53) (S54) (S55) (S56) (S57)) in the bottom molding apparatus (5) is substantially the same as that of the prior art. In these stations, the bottom plate (B2) having the drooping edge (B21) is combined with the body portion (C1) with the top curl (C2), and then the lower edge of the heated body portion (C1) is attached to the bottom plate. After performing bottom curl molding that bends inward so as to overlap with the drooping edge (B21) of the body, the bent lower edge (C11) of the joined body and the drooping edge (B21) of the bottom plate are almost Expansion molding is performed to form a cylindrical shape (see FIG. 21). Thereby, the bottom (C3) of the paper cup (C) is formed.

  Through the above steps, a paper cup (C) having a body (C1), a bottom (C3), and a top curl (C2) as shown in FIG. 21 is formed. The formed paper cup (C) is discharged from the container discharge station (S58) of the bottom molding device (5) to the outside of the molding machine (1) by the discharge device (7).

FIG. 22 shows a modification of the trunk receiving station of the top curl molding apparatus in the paper cup molding machine according to the embodiment of the present invention.
As shown in the figure, the trunk part transfer device (42) of the trunk part receiving station (S41) has a recess (422) into which the lower edge part of the trunk part (C1) is fitted on the upper surface, and the trunk part. An elevating stage (42a) that is moved up and down through the inside of the holder (41) so as to be close to and away from the mandrel (31) of the sending station (S33) is provided. The elevating stage (42a) has a substantially tray shape, and the upper end of the elevating rod (424) is connected to the lower end thereof. The inner peripheral surface (423) of the recess (422) of the elevating stage (42a) is tapered so as to follow the outer peripheral surface of the lower edge portion of the trunk portion (C1). A vacuum suction port (425) is opened on the inner peripheral surface (423) of the recess (422).
In the trunk transfer device (42), the lower edge of the trunk (C1) received from the mandrel (31) is connected to the inner peripheral surface (423) of the recess (422) of the lift stage (42a). The vacuum suction port (425) formed in the above is sucked and held. Therefore, according to the device (42), it is possible to easily adjust the delivery timing of the body portion (C1).

(1): Paper cup forming machine (cup-shaped paper container forming machine)
(3): Body forming equipment
(30): Turret (first rotating body)
(31): Mandrel for body molding
(35): Push-down sleeve (body push-down device)
(351): Pressing claw
(S33): Trunk feeding station
(4): Top curl molding equipment
(40): Table (second rotating body)
(41): Holder
(42): Body transfer device
(42a): Elevating stage
(421): Entrance
(42b): clamping clamp
(422): Recess
(423): Inner circumferential surface of the recess
(425): Vacuum suction port (suction means)
(45A): Inside holding die
(45B): Outer holding die
(45C): Curl forming dies
(46): Heating unit
(461): Lower opening recess
(462): Heated air outlet
(463): Presser plate (presser part)
(44): Body push-up device
(445): Vacuum suction port (suction means)
(S41): Torso receiving station
(S43): Precurl molding station
(S46): Finish curl forming station
(S44) (S45): Heating station
(S48): Body feeding station with top curl
(5): Bottom forming device
(50): Table (third rotating body)
(51): Mandrel for bottom molding
(S51): Body receiving station with top curl
(B1): Body forming blank
(B2): Bottom plate
(C): Paper cup (cup-shaped paper container)
(C1): trunk
(C2): Top curl
(C3): Bottom

Claims (11)

A plurality of body forming mandrels are provided radially at intervals in the circumferential direction and have a first rotating body that is rotated about a horizontal axis, and a blank supplied on a mandrel swirl path is used as a mandrel A body forming device for forming the body of the container by wrapping it around and joining both ends thereof,
A plurality of holders capable of accommodating the body portion are provided in the circumferential direction at intervals and have a second rotating body that is rotated around a vertical axis, and the body portion passed from the mandrel to the holder A top curl forming device for forming a top curl of a container by performing top curl processing at a plurality of processing stations provided on a holder turning path on an upper edge portion;
A plurality of bottom molding mandrels that can be fitted with top curled barrels are provided at intervals in the circumferential direction and have a third rotating body that is rotated around a vertical axis, and is transferred from the holder to the mandrel. A bottom molding device for molding the bottom of the container by joining the top curled body with a bottom plate made of a blank at a plurality of processing stations provided on the mandrel swirl path;
A cup-shaped paper container molding machine.
The first rotating body of the body forming device is composed of a turret in which a plurality of body forming mandrels are provided radially at intervals in the circumferential direction and rotated about a horizontal axis,
The second rotating body of the top curl forming device is composed of a table in which a plurality of holders capable of accommodating the body portion are provided at intervals in the circumferential direction and rotated about a vertical axis,
The third rotating body of the bottom molding apparatus is composed of a table in which a plurality of bottom molding mandrels capable of fitting a top curled body are provided at intervals in the circumferential direction and rotated about a vertical axis. The cup-shaped paper container molding machine described.   The body forming apparatus has a body sending station disposed at the lower end on the mandrel turning path, and the top curl forming apparatus receives a body receiving part directly below the body sending station on the holder turning path. And a barrel delivery station with a top curl disposed between a final processing station and a barrel receiving station, wherein the bottom molding device is a barrel delivery station with a top curl on a mandrel swivel path. The cup-shaped paper container molding machine according to claim 2, further comprising a top curled body receiving station disposed immediately above the top curl. The trunk forming device includes a trunk depressing device that is moved along the length of the mandrel so that the trunk can be depressed from the mandrel at the trunk delivery station.
The trunk | drum transfer apparatus which transfers the trunk | drum to which the trunk | drum pressed down from the mandrel was clamped in the trunk | drum thickness direction by the clamping means at the trunk | drum receiving station of a top curl molding apparatus is provided. Cup-shaped paper container molding machine.   The cup-shaped paper container molding machine according to claim 4, wherein the trunk portion pressing device has a pressing claw portion having a wedge-shaped cross section that is inserted between the inner peripheral surface of the upper edge portion of the trunk portion and the surface of the mandrel.   The trunk transfer device has a fitting inlet at the upper end into which the lower edge of the trunk is fitted, and moves up and down through the inside of the ring-shaped holder so that it can be moved closer to and away from the mandrel of the barrel delivery station. 6. A hollow elevating stage that is made to move, and a clamping clamp that is provided inside the elevating stage and presses the lower edge portion of the body portion toward the inner peripheral surface of the fitting portion. Cup-shaped paper container forming machine. The trunk forming device includes a trunk depressing device that is moved along the length of the mandrel so that the trunk can be depressed from the mandrel at the trunk delivery station.
4. A cup-shaped paper container according to claim 3, wherein a body receiving device of the top curl forming apparatus is provided with a body transferring device for transferring the body pushed down from the mandrel to the holder while being sucked and held by the suction means. Molding machine.   The cup-shaped paper container molding machine according to claim 7, wherein the trunk portion pressing device includes a pressing claw portion having a wedge-shaped cross section that is inserted between the inner peripheral surface of the upper edge portion of the trunk portion and the surface of the mandrel.   The trunk transfer device has a recess in which the lower edge of the barrel is fitted on the upper surface, and is raised and lowered through the inside of the ring-shaped holder so that it can be moved closer to and away from the mandrel of the barrel delivery station. 9. A cup-shaped cup according to claim 7 or 8, wherein a vacuum suction port for sucking and holding the lower edge of the body portion is opened on the inner peripheral surface of the recess of the lift stage. Paper container forming machine.   An inner holding die that includes at least one curl forming station among a plurality of processing stations of the top curl forming apparatus, and is fitted into the curl forming station from above on the inside of a body portion accommodated in a ring-shaped holder. And an outer holding die that is fitted from below on the outer side of the barrel portion accommodated in the holder, and the barrel portion is formed by the curl forming die in a state where the barrel portion is sandwiched between the inner holding die and the outer holding die. The cup-shaped paper container molding machine according to any one of claims 2 to 9, wherein curl molding is performed on an upper edge portion of the cup-shaped paper container.   At least one heating station is included in a plurality of processing stations of the top curl forming apparatus, and the heating station is disposed at a predetermined distance above the body portion accommodated in the ring-shaped holder, A heating unit having a lower opening recess capable of accommodating the upper edge portion and having a heated air blowing port opened on the inner peripheral surface of the lower opening recess, and a body portion accommodated in the holder by suction means There is provided a body push-up device that pushes up to a position where the upper edge of the heating unit is accommodated in the lower opening recess of the heating unit while sucking and holding, and in the lower opening recess of the heating unit, The cup-shaped paper container molding machine according to any one of claims 2 to 10, wherein a pressing portion to be brought into contact is provided.

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