JP6667964B2 - Method for shaping the articles to be packaged in the bag, and method for bagging and packaging, and bagging and packaging machine - Google Patents

Description

  The present invention relates to a method for changing the direction of a packaged object filled in a bag whose side edges are gripped by a pair of grippers (a method for shaping the packaged object in the bag), and a bag-filling packaging method to which the method is applied. And a bag packing machine.

  In Patent Document 1, both sides of a bag are gripped by a pair of grippers, and the bag is intermittently transferred along a predetermined transfer path. In a bag-filling packaging method in which a predetermined packing process including filling of a package and sealing of a bag mouth is sequentially performed, the bag mouth may be opened in a long opening shape in the thickness direction of the bag (see FIG. 3 of Patent Document 1). Has been described. According to Patent Document 1, by opening the bag mouth in such an opening shape, a restoring force is applied to the film on both surfaces of the bag to return to the original shape, and the opening guide (opening maintaining member) as in the related art. Even if the bag is not inserted in the bag, the bag mouth is eroded due to external effects generated in the transfer process, such as air resistance and sway during transfer, inertial force acting on the bag at the start and stop of movement, and mechanical vibration. (See FIG. 12 of Patent Document 1).

  In the bag packing method described in Patent Document 1, in the opening step, the bag mouth is opened in a long opening shape in the thickness direction of the bag, the bag is transferred in that state, and the opening guide is inserted into the bag mouth in the filling step. The distance between the pair of grippers is increased, and the opening guide is moved in the outer diameter direction of the opening of the bag opening, so that the opening of the bag opening changes from a long opening shape in the thickness direction of the bag to a more circular shape (see FIG. 6), the hopper is inserted into the bag mouth, and the bag is filled with granular objects to be packaged through the hopper.

JP 2010-247851 A

As described in Patent Literature 1, when the bag mouth is opened in the shape of a long opening in the thickness direction of the bag, the opening guide (opening maintaining member) is not inserted into the bag during the transfer process of the bag after the opening step. However, the shape of the opening is stable, and the bag mouth can be prevented from being deflated and closed.
Further, when the object to be packaged has a flat shape (the size in the width direction is larger than the size in the thickness direction), when the object to be packaged is inserted into the bag from the bag mouth, the shape is adjusted according to the opening shape. By arranging the width direction of the package parallel to the thickness direction of the bag, the packaged object can be inserted into the bag without any trouble, and it is not necessary to reshape the opening shape of the bag mouth with the opening guide.

However, when the package is inserted into the bag with the width direction of the package parallel to the thickness direction of the bag, there are the following problems.
FIG. 9A shows that the width direction of the flat packaged object 14 (for example, each of three flat pouches) is set in the width direction of the bag (the paper surface in FIG. 9). FIG. 9B is a view when the gap between the pair of grippers 4 is subsequently widened and the bag mouth is tightened. In this case, when the gap between the pair of grippers 4 is widened and the bag mouth is tightened, the film at the bag mouth is brought into a flat and tight contact state, and the sealing of the bag mouth can be performed without any problem. Further, since the sealed bag 3 (product bag) itself has a flat shape, it can be densely packed in a packing box (eg, a cardboard box) in an aligned state.
On the other hand, FIG. 9C is a diagram when the same packaged object 14 is inserted into the bag 3 with the width direction of the same bag parallel to the thickness direction of the bag (the left-right direction in FIG. 9), and FIG. FIG. 6 is a diagram when the bag mouth is tensed by widening the interval between the grippers 4. In this case, even if the gap between the pair of grippers 4 is widened and the bag mouth is tensed, the film at the bag mouth cannot be brought into a state of being in flat contact with the bag mouth, and the bag mouth may not be properly sealed. . Even if the bag mouth is sealed, the central portion of the bag 3 (product bag) after sealing is greatly expanded in the thickness direction of the bag, so that the bag 3 (product bag) is aligned in the packing box (cardboard box, etc.). Can not be packed tightly.

  In the present invention, the bag mouth of the bag whose both side edges are gripped by a pair of grippers is opened in the thickness direction of the bag, and the width direction of the article to be packaged is directed parallel to the thickness direction of the bag. An object of the present invention is to prevent the sealing and packing of the bag opening from being hindered when the package is inserted into the bag from the bag opening.

In the shaping method according to the present invention, the bag mouth of the bag whose both side edges are gripped by the pair of grippers is opened in the thickness direction of the bag, the bag is filled with the object to be packaged, and the width direction of the object to be packaged is When the bag is oriented parallel to the thickness direction of the bag, the pair of press plates sandwiches both sides of the bag and simultaneously moves the pair of press plates in the width direction of the bag in directions opposite to each other, and the pair of grippers After widening the interval and tightening the bag mouth, the pair of press plates are separated from the bag, whereby the width direction of the packaged object in the bag is changed from a direction parallel to the bag thickness direction to the bag width direction. It is characterized in that it is changed to a parallel direction.
In the above shaping method, the opened bag mouth preferably has an opening shape that is long in the thickness direction of the bag. The timing of starting to increase the interval between the pair of grippers may be simultaneous with, during, or after the pair of press plates sandwiches both sides of the bag.

A shaping apparatus for performing the shaping method is installed in a bag-filling and packaging machine, and a pair of press plates arranged to face each other, and the pair of press plates approaching or separating from each other, and the width of the bag in a direction opposite to each other. It has a drive mechanism for moving in the direction.
In a specific form of the shaping apparatus, the driving mechanism may be configured such that the driving mechanism is provided with a first lever rotatably mounted on a vertical first axis and a vertical second lever separated by a predetermined distance from the first axis. A second lever rotatably mounted on an axis, a drive source connected to the first lever for rotating the first lever back and forth by a predetermined angle about the first axis, A connecting member that connects a lever and forms a parallel link mechanism together with the first and second levers, and a connecting member that is installed on the first lever so as to be rotatable about vertical axes located on both sides of the first shaft. And two support members rotatably mounted on the second lever around vertical axes located on both sides of the second shaft, and the axes of the four support members in a horizontal plane. The square having the vertices forms a parallelogram, and the pair of press plates , Is fixed to the support member installed in each of the supporting member and the second lever installed in the first lever, are disposed parallel to each other on either side of the vertical plane passing through said first and second axes.

  In the bag packing method according to the present invention, both side edges of the bag are gripped by a pair of grippers, and the bag is transferred along a predetermined transfer path. In a bag-filling packaging method in which predetermined packing processing steps including filling of an object to be packaged, shaping of an object to be packaged in a bag, and sealing of a bag mouth are sequentially performed, in the bag mouth opening step, the bag mouth is closed. It is opened in the thickness direction, and in the step of filling the packaged object, the packaged object is inserted into the bag from the bag mouth, and at that time, the width direction of the packaged object is oriented parallel to the thickness direction of the bag, In the step of shaping the article to be packaged, the both sides of the bag are sandwiched by a pair of press plates, and at the same time, the pair of press plates are moved in the width direction of the bag in directions opposite to each other, so that the distance between the pair of grippers is widened. After tensioning, the pair of press plates are separated from the bag, thereby The width direction of the articles to be packaged, characterized in that changing the direction parallel to the width direction of the bag.

This bag packaging method can take the following specific forms.
(1) In the opening step of the bag mouth, the bag surface is sucked from both sides by a pair of suction members, and then the distance between the pair of suction members is widened and the distance between the pair of grippers is narrowed. After opening in the thickness direction to form an opening that is long in the direction, the suction by the pair of suction members is stopped to release the bag surface from the pair of suction members.
(2) In the process of being transferred along the transfer path, the posture of the bag held by the pair of grippers is vertical in the bag opening direction and horizontal in the bag width direction with the bag opening sideways. , The bag takes a horizontal position when the process of filling the package is performed, and the bag takes a vertical position when the process of shaping the product in the bag is performed.

  The bag-filling and packaging apparatus for performing the above-described bag-packing and packaging method is arranged along a predetermined moving path, moves intermittently along the moving path, can grip both side edges of the bag, and A bag transfer device provided with a plurality of pairs of grippers for increasing or decreasing the distance between each other, and a bag provided near the bag supply position, which is a stop position on the movement path, for supplying bags to the stopped pair of grippers. A supply device and a pair of suction members that are installed near a bag opening position that is a stop position on the movement path and that are opposed to each other and that can be brought into contact with and separated from each other, are gripped by the pair of grippers with the suction members. An opening device that adsorbs both sides of the bag and opens a bag mouth, and a filling device that is installed near the packing material filling position, which is a stop position on the movement path, and inserts the bagged object into the bag through the bag mouth. And on the travel route A seal device that is installed near the bag mouth sealing position, which is a stop position, and seals the bag mouth of the filled bag; and further, is installed near the shaping position, which is the stop position on the movement path, and And a shaping device for shaping the object to be packaged. The filling device is inserted with the width direction of the article to be packaged parallel to the thickness direction of the bag, and the shaping device includes a pair of press plates opposed to both surfaces of the bag stopped at the shaping position; A press mechanism for moving the pair of press plates in the width direction of the bag in a direction opposite to each other, and moving the pair of press plates in a direction opposite to the width direction of the bag in parallel with the width direction of the bag. Change direction.

This bag packing apparatus can take the following specific forms.
(1) In the opening device, the bag mouth is opened in the thickness direction of the bag to have an opening shape that is long in the direction.
(2) The bag transfer device changes the posture of the bag held by the pair of grippers from a vertical position with the bag mouth upward to the bag mouth during the process of moving the pair of grippers along the movement path. Can be changed to a horizontal position in which the width direction of the bag is turned horizontally, and the horizontal position can be changed from the horizontal position to the vertical position, and the bag held by the pair of grippers is horizontal at the packing object filling position. Take a posture and take a vertical posture at the shaping position.

(3) In the above mode (2), the bag transfer device may include a plurality of retainers that move along a trajectory in a horizontal plane, a posture changing cam and a gripper swing installed on a machine of the bag packing machine. A moving cam, wherein each of the retainers is swingably supported by the moving frame, and each of the moving frames comprises a horizontal swing frame; and the pair of grippers is installed on each of the swing frames. A bag attitude changing mechanism installed on the moving frame, wherein the retainer is installed on the moving frame and connected to the swinging frame to swing the swinging frame at an angle of 90 °, and the pair of grippers is installed on the moving frame. A gripper opening / closing mechanism that swings and widens or narrows the interval between the pair of grippers, the bag posture changing mechanism is swingably supported by the moving frame, and the swing shaft is A first cam lever parallel to a swing axis of the swing frame, a first cam roller rotatably installed at a free end of the first cam lever, and a first connection for connecting the first cam lever to the swing frame. The first cam roller contacts the cam surface of the posture changing cam, and is displaced as the moving frame moves. The gripper opening / closing mechanism is swingably supported by the moving frame. A second cam lever having a horizontal moving axis in a plane perpendicular to the swing axis of the swing frame, a second cam roller rotatably installed at a free end of the second cam lever, the second cam lever and the second cam lever; The second cam roller contacts the cam surface of the gripper swing cam, and is displaced as the moving frame moves.
(4) In the configuration of the above (3), the first connection mechanism may include a first swing arm that swings in accordance with the displacement of the first cam roller, one end connected to the first swing arm, and the other end. Has a first connecting rod connected to the swing frame, and the first swing arm and the first connecting rod constitute a toggle mechanism.

  According to the present invention, a bag mouth of a bag whose side edges are gripped by a pair of grippers is opened in the thickness direction of the bag, and the width direction of the packaged object is directed parallel to the thickness direction of the bag. After inserting the to-be-packaged product into the bag from the bag mouth, the direction of the to-be-packaged product in the bag is changed so that its width direction is parallel to the width direction of the bag. Thus, when the gap between the pair of grippers gripping both side edges of the bag is widened and the bag mouth is tensed, the film at the bag mouth can be brought into a flat close contact state, and the seal of the bag mouth can be properly sealed. It can be carried out. In addition, since the width direction of the packaged object in the bag is parallel to the width direction of the bag, the product bag has a flat shape along the contour of the packaged product, and is aligned in the packing box (such as a cardboard box). Can be packed tightly.

  In the bag packing method and the bag packing machine according to the present invention, the bag mouth of the bag whose both side edges are gripped by the pair of grippers is opened in the bag thickness direction to have a long opening shape in the bag thickness direction. Accordingly, in the transfer process after the opening step, the opening shape of the bag mouth is stably maintained even when the opening guide (opening maintaining member) is not inserted into the bag. In particular, in the process of transferring the bag along the transfer path, the bag with the bag mouth opened, the vertical posture with the bag mouth facing upward, and the horizontal posture with the bag mouth facing sideways with the bag mouth facing sideways. When it is necessary to change between the positions, it is difficult to perform such a posture change with the opening guide inserted into the bag, so that the opening shape of the bag mouth is stably maintained without the opening guide. It is very useful.

It is a top view of the bag packing machine concerning this invention. It is a schematic plan view explaining operation and function of a pair of press plates of a shaping device concerning the present invention with time. It is a side view of the shaping apparatus concerning this invention. FIGS. 4A and 4B are views taken along the line AA in FIG. 3 (when a pair of press plates are separated) (4A), and a view taken along the line BB in FIG. FIG. 4 is a view taken in the direction of arrows AA in FIG. 3 (when a pair of press plates approach). FIG. 5 is a view taken in the direction of arrows CC in FIG. 4. FIG. 2 is a perspective view of a retainer of the bag transfer device of the bag filling and packaging machine shown in FIG. 1 (when a bag held by a pair of grippers is in a vertical position). FIG. 8 is a partially omitted perspective view of the retainer shown in FIG. 7 (when the bag held by the pair of grippers is in a horizontal position). When inserting a flat object to be packaged into the bag, the width direction of the object to be packaged is inserted parallel to the width direction of the bag, and the bag mouth is tightened (FIGS. 9A and 9B), and FIG. It is a figure (9C, 9D) when the width direction of the package is inserted parallel to the thickness direction of the bag and the bag mouth is tightened. It is a side view explaining stability when a to-be-packaged article width which consists of a plurality of components from which a size in the width direction differs is put on a tray.

Hereinafter, a shaping method and a shaping apparatus according to the present invention, and a bag packing method and a bag packing machine using the same will be described more specifically with reference mainly to FIGS.
1. Outline of Bag Packing Machine The packaging machine shown in FIG. 1 includes a plurality of retainers 1 and moves the retainers 1 in one direction along a racetrack-type horizontal track composed of two linear portions and two arc portions ( It comprises a bag transfer device 2 that moves intermittently (clockwise) and a plurality of packaging processing devices that are arranged along the linear portion (A lane and B lane) of the track. No packaging processing device is arranged in the arc portion of the track (A / B lane and B / A lane). The retainer 1 is provided with a pair of grippers 4 for gripping both side edges of the bag 3 (as will be described later, a pair of gripper arms and a grip portion provided at the tip of each gripper arm). . As the retainer 1 intermittently moves along the track, the pair of grippers 4 intermittently move along a predetermined movement path, and the pair of grippers 4 holds the bag 3 whose both side edges are gripped. It is intermittently transferred along the transfer path.

  The retainers 1 (a pair of grippers 4) are arranged at the same arrangement interval (pitch) in the linear portion (A lane and B lane) of the track. Assuming that this pitch is p, the distance of one movement of the retainer 1 (a pair of grippers 4) is set to twice the pitch p in the A lane, and is set to four times in the B lane. ing. While the cycle of moving and stopping the retainer 1 is performed once in the B lane, it is repeated twice in the A lane. Therefore, one stop time of the retainer 1 in the A lane is set shorter than one stop time in the B lane.

  The packaging processing devices arranged on the A lane side are an empty bag supply device 5, a printing device 6, a printing inspection device 7, an opening device 8, a sealing device 9, a cooling device 10, and a discharge conveyor 11, all of which are Arranged near the stop position on the A lane (the position where the two retainers 1 stop), each of the two retainers 1 (two pairs of grippers 4) held at the stop position is held by the two retainers 1. Each bag 3 is simultaneously subjected to each packaging process. These packaging processes can be performed in a relatively short time.

  The packaging processing devices arranged on the B lane side are the packaged object supply device 12 and the shaping device 13. The packaged object supply device 12 applies a predetermined number of bags 3 (a total of four) held by the four retainers 1 (four pairs of grippers 4) stopped at predetermined positions on the B lane. A packaging process is performed (supplying the article to be packaged 14). The shaping device 13 is arranged near the predetermined stop position (the position where the four retainers 1 stop) on the B-lane, following the packaged object supply device 12, and the four shaping devices stopped at the stop position. The four bags 3 held by the retainer 1 (four pairs of grippers 4) are subjected to a predetermined packaging process (shaping of the articles 14 filled in the bags 3). The packaging process performed by the packaged object supply device 12 and the shaping device 13 requires a longer time than the various packaging processes performed in the A lane.

2. Packaging Process Performed by Bag Packaging Machine In the bag packaging machine shown in FIG. 1, the following processes are sequentially performed while the retainer 1 rotates intermittently on the track and makes one rotation.
(1) Bag Supply Process When the two retainers 1 stop at the bag supply process position (stop position S1), two bags (empty bags) 3 are provided from the two empty bag supply devices 5 provided in parallel. Are simultaneously supplied to the pair of grippers 4 of the retainer 1 and are gripped by the pair of grippers 4 in a vertical posture (in a state of being suspended and the bag mouth facing upward). The specific structure of the retainer 1 will be described later.

(2) Printing Step When the two retainers 1 are stopped at the printing step position (stop position S2), the pair of grippers 4 of the two retainers 1 are gripped by the printing device 6 having two print heads. Printing is performed on the bag surface of the bag 3.
(3) Print Inspection Process When the two retainers 1 stop at the print inspection process position (stop position S3), the two print inspection devices 7 attached to each other grip the pair of grippers 4 of the two retainers 1. A printing inspection is performed on the bag 3 thus completed.

(4) Bag opening process
When the two retainers 1 are stopped at the opening process position (stop position S4), the opening device 8 provided with two pairs of suction cups 15 removes the bag 3 held by each pair of grippers 4 of the two retainers 1. A bag mouth is opened. In this opening step, the pair of suction cups 15 approach and contact both sides of the bag 3 and are attracted and then separated from each other by a predetermined distance, and at the same time, the distance between the pair of grippers 4 is narrowed (for the bag 3 held by the pair of grippers 4). The width is reduced). In this opening step, the bag mouth of the bag 3 (see FIG. 2A) has an opening shape long in the thickness direction of the bag 3 (arrow T) (the size in the width direction of the bag is U, and the size in the thickness direction of the bag is V). V> U). By opening the bag opening of the bag 3 in this opening shape, the opening shape is stably maintained while the bag 3 is transferred along the transfer path.

(5) Bag posture changing step This bag posture changing step is performed while the retainer 1 is moving along the arc portion (the A / B lane) of the track, and the bag 3 held by the pair of grippers 4 of the retainer 1 Immediately before moving from the A / B lane to the B lane, the vertical posture is changed to the horizontal posture. In the bag 3 after the posture change, the opened bag mouth is horizontal and the width direction of the bag is horizontal. The mechanism for changing the bag attitude will be described later together with the structure and function of the retainer 1.

(6) Packaged Article Supplying Step When the four retainers 1 stop at the packaged article supplying step position (stop position S5), the bags 3 gripped by each pair of grippers 4 of the four retainers 1 (four pieces in total) ), The articles to be packaged are supplied simultaneously.
The package supply device 12 includes a belt conveyor 16 for intermittently transporting the package 14 at the same interval as the pitch p, and a package conveyor 14 for moving the package 14 forward (in a direction perpendicular to the transport direction of the belt conveyor 16). Four pushers 17 to be pushed out, and a bag 4 arranged in front of each pusher 17 (between the belt conveyor 16 and the four retainers 1 stopped at the stop position S5) and held by each pair of grippers 4 of the retainer 1 The tray 18 can move forward and backward.

When the four retainers 1 stop at the stop position S5, the pusher 17 operates to push the packaged object 14 forward and place it on the tray 18. The tray 18 includes a bottom plate 18a on which the package 14 is placed, and left and right guide plates 18b and 18c for regulating both sides of the package 14. In this example, the packaged object 14 is composed of a plurality of flat pouches (see FIG. 2A), and has a flat shape as a whole (X> Y when the size in the width direction is X and the size in the thickness direction is Y). . The article to be packaged 14 is placed on the tray 18 with the width direction directed up and down and the thickness direction directed parallel to the transport path of the bag 4. The article to be packaged 14 is also placed on the belt conveyor 16 in a similar manner.
Subsequently, the tray 18 advances and is inserted into the bag 3 from the opened bag opening of the bag 3 in the horizontal position, and then retracts to the original position. When the tray 18 retreats, the article to be packaged 14 is left in the bag 3. The size of the packaged object 14 in the width direction is large, and the opening shape of the bag mouth of the bag 3 is large in the thickness direction of the bag, and both directions are in the same direction (both vertical directions). 18 (packaged object 14) does not hinder insertion.

When the object to be packaged is composed of a plurality of flat components (for example, a small bag) and the objects to be packaged are simultaneously inserted into the bag in a stacked state, the bag with the bag opening facing upward in a vertical position. It is preferable to change the bag to a horizontal posture (bag opening sideways) as in the above example, in terms of easy handling of the components, as compared to the above.
In particular, when a plurality of components have different sizes in the width direction, it is preferable that the components are stacked on a tray so that the width direction of each component is oriented vertically, and inserted into a bag in a horizontal posture. When a plurality of such components (for example, pouches) are stacked and placed on the tray 18 so that the width direction thereof is oriented in the horizontal direction (see FIG. 10A), the alignment state is lost in the course of transport (see FIG. 10B). On the other hand, when the sheets are stacked on the tray 18 such that the width direction thereof is oriented in the vertical direction (see FIG. 10C), the alignment state does not collapse during the conveyance process (see FIG. 10D), and the alignment state is maintained. It can be inserted into the bag as it is.

(7) Bag posture changing step This bag posture changing step is performed while the retainer 1 is moving on the B lane, and the bag 3 held by the retainer 1 (gripper 4) is changed from a horizontal posture to a vertical posture. . The mechanism for changing the bag attitude will be described later together with the structure and function of the retainer 1.

(8) Shaping Process When the four retainers 1 are stopped at the shaping process position (stop position S6), the bags 3 (total of four) held by each pair of grippers 4 of the four retainers 1 are each formed by a shaping device. 13 are simultaneously sandwiched between a pair of press plates. This shaping step will be described mainly with reference to FIGS.
When the retainer 1 stops at the stop position S6, as shown in FIG. 2A (and FIG. 3), the bag 3 gripped by the pair of grippers 4 (only gripping portions are shown) is in a vertical posture, and the bag mouth is the bag opening. It has a long opening shape in the thickness direction, and the package 14 is filled in the bag. The width direction of the packaged object 14 is parallel to the thickness direction of the bag 3 (arrow T). A pair of press plates 19 are symmetrically arranged on both sides of the transfer path of the bag 4 so as to face each other. At this time, the pair of press plates 19 are located at the standby position where they do not interfere with the bag 3 transferred to the stop position S6, and are in a state of being separated from each other.

Subsequently, the pair of press plates 19 approach each other and move in the width direction of the bag 3 in opposite directions. During this movement, the pair of press plates 19 maintain their rotationally symmetric positions. As shown in FIG. 2B, when a pair of press plates 19 sandwiches both sides of the bag 3, the packaged object 14 in the bag 3 is pressed and rotated by the press plate 19, and its width direction is the thickness direction of the bag. Incline from a direction parallel to. In parallel with the movement of the pair of press plates 19, the interval between the pair of grippers 4 is widened.
As shown in FIG. 2C, when the pair of press plates 19 reach the end point of the movement (the forward position), the width direction of the packaged object 14 in the bag 3 is a direction substantially parallel to the width direction of the bag 3. Can be changed to The advance position is thus set. Also, at this point, the interval between the pair of grippers 4 is widened to such an extent that the film at the bag mouth is strained.
Subsequently, the pair of press plates 19 separate from each other, release the bag 3, and return to the original standby position as shown in FIG. 2D.

In the above example, the interval between the pair of grippers 4 is increased in parallel with the pair of press plates 19 approaching. It may be at the same time as the press plate 19 starts to approach or during the approach. Alternatively, it may be after the pair of press plates 19 have reached the advance position (after the direction of the width direction of the packaged object 14 has been changed to a direction substantially parallel to the width direction of the bag 3). However, if the pair of press plates 19 are separated before the distance between the pair of grippers 4 is widened, the direction of the packaged object 14 may return to the original state (return to the state of FIG. 2A). Therefore, it is preferable that the interval between the pair of grippers 4 is widened to such an extent that the film at the bag opening is tensioned before the pair of press plates 19 starts separating.
In the above example, the pair of press plates 19 approach and move away from each other while maintaining their positions parallel and rotationally symmetric to each other, but this is not essential and can be changed within a range where a predetermined action can be obtained.

Next, an example of the structure of the shaping device 13 will be described with reference to FIGS.
The shaping device 13 includes a pair of wide press plates 19 and a drive mechanism 21 that moves the pair of press plates 19 toward and away from each other and moves the pair of press plates 19 in opposite directions in the width direction of the bag.
The drive mechanism 21 includes shaft members 23 and 24 erected on the machine base 22 of the bagging and packaging machine, and a first lever 25 and a second lever rotatably supported by the shaft members 23 and 24 via bearings, respectively. 26, a drive source (rotary actuator) 27 for rotating the first lever 25, and a connecting rod that connects the first and second levers 23 and 24 and forms a parallel link mechanism together with the first and second levers 23 and 24. 28. The first lever 25 is rotatable about the O ₁ (center of the shaft member 23) vertical first axis, the second lever 26 rotates about a vertical second axis (axial center of the member 24) O ₂ It is free. The rotary actuator 27 is installed on the machine base 22 and has an output shaft 29. The output shaft 29 is connected to one end of the first lever 25 via a crank mechanism (a crank 31 and a connecting rod 32 fixed to the output shaft 29). is connected, the rotary actuator 27 is output shaft 29 operates to forward and reverse rotation, the first lever 25 is rotated normally and reversely (swinging) around the first axis O ₁ via the crank mechanism, further connecting rod 28 through the second lever 25 around the second axis _{O 2,} in synchronism with the first lever 25 to forward and reverse rotation (swing).

The drive mechanism 21 further includes rod-shaped support members 33 and 34 rotatably installed on the first lever 25 and rod-shaped support members 35 and 36 rotatably installed on the second lever 26. The support members 33 and 34 are rotatable about vertical axes O ₃ and O ₄ located at equal distances on both sides of the first axis O ₁ , and the support members 35 and 36 are rotatable about the second axis O _2. Are rotatable about vertical axes O ₅ and O ₆ located at equidistant positions on both sides of. If the four axes O ₃ ~ O ₆ assuming a rectangle having vertices in a horizontal plane, the square forms a parallelogram.
One of the pair of press plates 19 is vertically fixed to a support member 33 provided on the first lever 25 and a support member 35 provided on the second lever 26, and the other is a support member provided on the first lever 25. 34 and vertically fixed to a support member 36 disposed in the second lever 26 are disposed parallel to each other on either side of the vertical plane N which passes through the first axis O ₁ and the second shaft O _2.
Since the shaping device 13 has the above structure, the pair of press plates 19 move toward or away from each other and simultaneously move in the width direction of the bag 3 in opposite directions with the operation of the rotary actuator 27. Meanwhile, remaining parallel pair of press plates 19 each other and maintain the rotational symmetrical positions across the vertical plane N which passes through the first axis O ₁ and the second axis O _2.

(9) Sealing process of bag mouth When the two retainers 1 are stopped at the sealing process position (stop position S7), the sealing device 9 including two sets of the pair of hot plates 37 is used to seal each pair of the two retainers 1. The bag mouths of the bags 3 (two in total) held by the gripper 4 are sealed.
(10) Cooling process of seal part When the two retainers 1 are stopped at the cooling process position (stop position S8), the cooling device 10 including two sets of the pair of cooling plates 38 causes each of the two retainers 1 to The seal portions of the bags 3 (two in total) held by the gripper 4 are cooled.
(11) Discharging Step After the sealing portion is cooled, the bag 3 (product bag) is released from the pair of grippers 4 of the retainer 1, and the pair of cooling plates 38 are opened, dropped onto the discharge conveyor 11, and packed in a bag. Emitted outside the machine.

3. Configuration of Bag Transfer Device The bag transfer device 2 includes a plurality of retainers 1, a retainer moving rail (not shown) that is horizontally laid on a machine base 22 in a race track shape, and guides the movement of the retainers 1 along the track. , A retainer moving mechanism for moving the retainer 1.
3-1. As shown in FIGS. 7 and 8, the retainer 1 includes a moving frame 41 that moves along the retainer moving rail, a swing frame 42 that is swingably supported by the moving frame 41, and a swing frame 42. And a pair of grippers 4 installed to be swingable. The pair of grippers 4 includes gripper arms 43 and 44 and gripping portions 45 that are installed at respective distal ends of the gripper arms 43 and 44 and that can be opened and closed to grip side edges of the bag 3 when closed.

The moving frame 41 includes a horizontal wall 41a and a pair of vertical walls 41b and 41c. The swing frame 42 is disposed below the horizontal wall 41a of the moving frame 41 and between the vertical walls 41b and 41c.
The support shafts 46, 46 fixed to the swing frame 42 are rotatably supported by the lower ends of the vertical walls 41b, 41c of the movable frame 41, and the swing frame 42 is supported by the swing shaft O ₇ (support shaft 46). (The axis passing through the center). Pivot shaft O ₇ is horizontal, parallel to the tangential direction of the track of the retainer 1.

The swing frame 42 includes support walls 42a and 42b arranged vertically in FIG. 7 and a pair of vertical walls 42c and 42d, and supports a support shaft 47 fixed to bases 43a and 44a of the gripper arms 43 and 44. 48 is rotatably supported by the support walls 42a and 42b. Further, a pin 49 is fixed to the base 43a of the gripper arm 43, an elongated hole (not shown) is formed in the base 44a of the gripper arm 44, and the pin 49 penetrates the elongated hole (Japanese Patent Laid-Open No. 9-95318). see FIG. 3) of a result, so that the gripper arms 43 and 44 symmetrically swings with each other in a plane parallel (FIG. 7 in a horizontal plane) to the pivot axis O _7.
A tension spring 51 (a part of a gripper arm swinging mechanism 54 described later) is stretched between bases 43a and 44b of the gripper arms 43 and 44, and constantly urges the gripper arms 43 and 44 inward (close direction). ing.

  Each holding portion 45 of the pair of grippers 4 is composed of a fixed holding piece 45a and a movable holding piece 45b, and the movable holding piece 45b is provided with a compression spring mechanism installed inside the gripper arms 43 and 44 (Japanese Patent Laid-Open No. 6-156440). (See FIG. 2). A roller 52 is connected to the rear end of the compression spring mechanism, and a pressing member (not shown) which is advanced and retracted by a driving source is provided near the stop position S1 and the stop position S8. Is pushed forward (to the side of the holding portion 45), whereby the movable holding piece 51b opens against the urging force of the compression spring mechanism.

The retainer 1 further moves the swing frame 42 from the horizontal state (the state of FIG. 7) to the vertical state (the state of FIG. 8), or from the vertical state (the state of FIG. 7) to the horizontal state (the state of FIG. 7). A bag attitude changing mechanism 53 for swinging 90 ° is provided, and a gripper swing mechanism 54 for widening or narrowing the interval between the pair of grippers 4 (swing the gripper arms 43 and 44).
The bag attitude changing mechanism 53 swings with a pair of first cam levers 55, a first cam roller 57 rotatably mounted on the first cam levers 55, 55 via a support block 56, and one of the first cam levers 55. The first connecting mechanism 58 connects the moving frame 42.

The first cam levers 55, 55 are fixed to support shafts 59, 59, and the support shafts 59, 59 are rotatably supported by a pair of supports provided on the horizontal wall 41a of the moving frame 41. Support shaft 59, 59 is parallel to the oscillation axis _{O 7} both in horizontal, the first cam lever 55 swings around the support shaft 59, 59. Since the support shafts 59, 59, the first cam levers 55, 55, and the support block 56 form a kind of parallel link mechanism, the support block 56 is always horizontal even if the first cam levers 55, 55 swing. The axis of the first cam roller 57 is always maintained in the vertical direction.
The first connection mechanism 58 has a pair of first swing arms 61, 61 each having one end fixed to one support shaft 59, and one end connected to the other end of each first swing arm 61, and the other end. It comprises a pair of first connecting rods 62, 62 connected to the vertical walls 42c, 42d of the swing frame 42. Like the first cam lever 55, the first swing arm 61 swings around the one support shaft 59, and forms a toggle mechanism together with the first connecting rod 62.

The gripper arm swing mechanism 54 connects the second cam lever 63, a second cam roller 64 rotatably installed at the free end of the second cam lever 63, and the second cam lever 63 and one gripper arm 43 (base 43 a). And the tension spring 51.
The second cam lever 63 is fixed to one end of a support shaft 66, and the support shaft 66 is rotatably supported by a pair of support portions installed on the horizontal wall 41 a of the moving frame 21. The support shaft 66 is perpendicular in plan view with respect to the oscillation axis O ₇ in a horizontal, second cam lever 63 is swung about the support shaft 66. The second cam roller 64 is provided at a free end of the second cam lever 63, and has a horizontal axis.

The second connection mechanism 65 includes a second swing arm 67 having one end (upper end) fixed to the other end of the support shaft 66 and a second connection rod 68. The second swing arm 67 swings about the axis of the support shaft 66, similarly to the second cam lever 63. Second connecting rod 68, the axis is disposed in a position substantially overlapping with the swinging axis O ₇ of the swing frame 42, one end connected to the other end (lower end) of the second swing arm 67, the other end one Of the gripper arm 43 via a support 69. The second connecting rod 68 includes spherical sliding bearings 68a and 68b having aligning properties (allowing the inclination of the shaft) at both ends.

  As shown in FIG. 7, as a part of the bag transfer device 2, an attitude changing cam 71 common to each retainer 1 is installed endlessly in a horizontal plane along the track (retainer moving rail) of the retainer 1. ing. The posture changing cam 71 is a positive cam composed of a pair of cam members 71a and 71b arranged at regular intervals in a horizontal plane, and is provided between the two cam members 71a and 71b. The first cam roller 57 is arranged, and is in contact with the inner side surfaces (cam surfaces) of both cam members 71a and 71b. When the retainer 1 intermittently moves, the first cam roller 57 moves while rotating between the two cam members 71a and 71b.

When the retainer 1 moves in a region (region P1-P2) between the position P1 and the position P2 shown in FIG. 1, the first cam roller 57 is displaced along the cam surface of the posture changing cam 71 in the radial direction of the track. (Displaced from the position shown in FIG. 7 to the position shown in FIG. 8). As a result, the first cam levers 55, 55 swing in the same direction as the first cam roller 57, and the swing frame 22 shifts from the horizontal state to the vertical state via the first swing arm 61 and the first connecting rod 62. Then, as shown in FIG. 8, the gripper arms 43 and 44 are in the downward posture, and the bag 3 clamped by the clamping portions 51 (the fixed clamping piece 51a and the movable clamping piece 51b) is in the horizontal posture. At this time, the interval between the gripper arms 23 and 24 is reduced, and the bag mouth of the bag 3 is open.
While the retainer 1 moves in the region (region P2-P3) between the position P2 and the position P3 shown in FIG. 1, the first cam roller 57 keeps the position (the position shown in FIG. 8) moved in the inner diameter direction of the track. The gripper arms 43 and 44 maintain the downward posture, the bag 3 maintains the horizontal posture, and the bag mouth maintains the open state.

When the retainer 1 moves in a region (region P3-P4) between the position P3 and the position P4 shown in FIG. 1, the first cam roller 57 is displaced in the outer radial direction of the track along the cam surface of the posture changing cam 71. (Displaced from the position shown in FIG. 8 to the position shown in FIG. 7). Accordingly, the first cam levers 55, 55 swing in the same direction as the first cam roller 57, and the swing frame 22 shifts from the vertical state to the horizontal state via the first swing arm 61 and the first connecting rod 62. Then, as shown in FIG. 7, the gripper arms 43 and 44 are in a horizontal position, and the bag 3 held by the holding portions 51 (the fixed holding pieces 51a and the movable holding pieces 51b) is in a vertical position. At this stage, the bag mouth of the bag 3 is open.
While the retainer 1 moves in a region (region P4-P1) between the position P4 and the position P1 shown in FIG. 1, the first cam roller 57 moves the position (the position shown in FIG. 7) moved in the outer radial direction of the track. The gripper arms 43 and 44 maintain the horizontal posture, and the bag 3 maintains the vertical posture.

   As shown in FIG. 7, a gripper swing cam 72 common to each retainer 1 is provided endlessly along the track (retainer moving rail) of the retainer 1 as a part of the bag transfer device 2. The second cam roller 64 of the gripper arm swing mechanism 54 contacts the lower surface (cam surface) of the gripper swing cam 72 by the urging force of the tension spring 51. Although not shown, the gripper swing cam 72 is not specifically shown, but in detail, two lifting parts (first lifting part, second lifting part) and two fixing parts (first fixing part, second fixing part) along the circumferential direction. ).

When the two retainers 1 are stopped at the stop position S4 (opening process position) shown in FIG. 1, the second cam roller 64 of the retainer 1 comes into contact with the first vertically moving portion of the gripper swing cam 72. Next, the first vertically moving portion is moved up, whereby the gripper arms 43 and 44 are closed (the distance between each other is narrowed) by the action of the tension spring 51, and the second connecting rod 68, the second swing arm 67, and the support shaft 66 are moved. The second cam roller 64 follows the first elevating portion and rises via the second cam lever 63.
When the retainer 1 exits the stop position S4, the second cam roller 64 of the retainer 1 separates from the first elevating part and comes into contact with the first fixed part. Since the height of the first fixed portion is set to be the same as the height of the first ascending and descending portion, the height of the second cam roller 64 does not change at this time. After the retainer 1 exits the stop position S4, the first elevating part descends to the original position.

Until the four retainers 1 reach the vicinity of the stop position S6, the second cam roller 64 of the retainer 1 contacts the first fixed portion of the gripper swing cam 72, during which the gripper arms 43 and 44 are closed. (The bag mouth of bag 3 is open).
When the four retainers 1 are stopped at the stop position S6 (shaping process position) shown in FIG. 1, the second cam roller 64 of the retainer 1 comes into contact with the second vertically moving portion of the gripper swing cam 72. At this time, the height of the second elevating part is set to the same height as the first fixed part. When the shaping process is started at the stop position S6, the second elevating / lowering portion is lowered, the second cam roller 64 is pushed down against the urging force of the tension spring 51, and the second cam lever 63, the support shaft 66, the second The gripper arms 43 and 44 are opened via the swing arm 67 and the second connecting rod 68 (the distance between the grippers arms 43 and 44 is widened), and the film of the bag 3 is pulled in the bag width direction and tightened (the bag mouth is closed).

When the retainer 1 exits the stop position S6, the cam roller 64 of the retainer 1 separates from the second elevating part and comes into contact with the second fixed part. Since the height of the second fixed portion is set to be the same as the height of the lowered second elevating portion, the height of the cam roller 64 does not change at this time. After the retainer 1 exits the stop position S6, the second vertically moving part is raised to the original position.
Subsequently, until the two retainers 1 reach the vicinity of the stop position S4, the second cam roller 64 of the retainer 1 contacts the second fixed portion of the gripper swing cam 72, during which the gripper arms 43 and 44 are opened. (A state where the distance between each other is wide) is maintained. As described above, when the two retainers 1 stop at the stop position S4 (opening process position) shown in FIG. 1, the cam rollers 44 of the two retainers 1 come into contact with the first elevating portion, At this time, the height of the first elevating part is set to the same height as the second fixing part.

3-2. Retainer moving mechanism The retainer moving mechanism, as shown in FIG. 1, shows only a first retainer moving mechanism (retainer holding members 73 and 74) that moves the retainer 1 along the linear portion of the track (the A lane and the B lane). ), And a second retainer moving mechanism (only the retainer holding members 75 and 76 are shown) for moving the retainer 1 along the arc portion (A / B lane and B / A lane) of the track. Each of the retainer holding members 73 to 76 is provided with a plurality of concave groove-shaped locking portions 77.
The four moving frames 41 of the adjacent retainers 1 are connected to each other at a fixed interval (pitch p) so as to be rotatable in a horizontal plane. The four retainers 1 (hereinafter, referred to as retainer sets) connected to each other move and stop together while maintaining the pitch p. Further, a shaft member 78 with which the locking portion 77 is engaged is installed on the moving frame 41 of each retainer 1 (only the shaft member 78 installed on the first retainer of the retainer set is shown in FIG. 1). ).

The retainer holding member 73 of the first retainer moving mechanism performs so-called box motion (forward-forward-backward-backward) in a horizontal plane. When the retainer holding member 73 advances from the standby position, each locking portion 77 fits on the shaft member 78 of the retainer 1 (the first retainer of each retainer set) (the state shown in FIG. 1), and the retainer holding member 73 moves forward. At this time, the retainer 1 is moved along the A-lane by two pitches (a distance twice as long as the arrangement interval p of the retainer 1). Subsequently, the retainer holding member 73 retreats (the engagement between the locking portion 77 and the shaft member 78 is released), moves back, and returns to the original standby position. In the next box motion, when the retainer holding member 73 advances from the standby position, each locking portion 77 fits on the shaft member 78 of the third retainer of each retainer set, and also moves the retainer 1 by two pitches.
The retainer holding member 74 performs the same box motion. However, the retainer holding member 74 moves the retainer 1 along the B-lane by four pitches (a distance four times the arrangement interval p of the retainer 1) in one box motion. Then, while the retainer holding member 74 performs one box motion, the retainer holding member 73 performs two box motions.

  The retainer holding members 75 and 76 of the second retainer moving mechanism rotate intermittently in a horizontal plane. Two retaining portions 77 are formed on the retainer holding members 75 and 76 at symmetrical positions separated from each other by 180 degrees, and the retaining portions 77 protrude or retreat in the outer diameter direction of the A / B lane or the B / A lane. It is possible. When the locking portion 77 stopped at the start point of the A / B lane or the B / A lane projects, the end point position of the A lane (start point of the A / B lane) or the end point position of the B lane (B / A lane). (The start point position of the retainer set), the shaft member 78 of the retainer 1 (the first retainer of the retainer set) stopped. Subsequently, when the retaining portions 77 of the retainer holding members 73 and 74 are disengaged from the shaft member 78 and the retainer holding members 75 and 76 rotate, the retainer 1 moves along the A / B lane or the B / A lane. In the A / B lane or the B / A lane, the retainer 1 at the head of the retainer set is the end position of the A / B lane (start position of the B lane) or the end position of the B / A lane (the start position of the A lane). Position), the locking portions 77 of the retainer holding members 73 and 74 are fitted into the shaft members 78 of the retainer 1, and the locking portions 77 of the retainer holding members 75 and 76 are retracted to move the shafts. It comes off the member 78.

REFERENCE SIGNS LIST 1 retainer 2 bag transfer device 3 bag 4 pair of grippers 13 shaping device 14 packaged object 19 press plates 43, 44 gripper arm 45 holding portion p Arrangement intervals S1 to S8 of retainers (pair of grippers) in A lane and B lane Stop position P1 to P4 Position of retainer on orbit

Claims (12)

The bag mouth of the bag whose both side edges are gripped by the pair of grippers is opened in the thickness direction of the bag, and the bag is filled with the object to be packed, and the width direction of the object to be packed is parallel to the thickness direction of the bag. When oriented, the pair of press plates sandwiches both sides of the bag and simultaneously moves the pair of press plates in the direction opposite to each other in the width direction of the bag, and widens the gap between the pair of grippers to open the bag opening. After tensioning, the pair of press plates are separated from the bag, whereby the width direction of the packaged object in the bag is changed from a direction parallel to the bag thickness direction to a direction parallel to the bag width direction. The method of shaping the items to be packaged in the bag. The method for shaping an article to be packaged in a bag according to claim 1, wherein the bag mouth of the bag has an opening shape that is long in the thickness direction of the bag. Both side edges of the bag are gripped by a pair of grippers, and the bag is transferred along a predetermined transfer path. In a bag-filling packaging method in which predetermined packaging processing steps including shaping of a packaged object and sealing of the bag mouth are sequentially performed, in the bag mouth opening step, the bag mouth is opened in the thickness direction of the bag, and In the filling step, the object to be packaged is inserted into the bag from the bag mouth, and at that time, the width direction of the object to be packaged is oriented parallel to the thickness direction of the bag. After sandwiching both sides of the bag with the press plate, the pair of press plates are moved in the width direction of the bag in opposite directions to each other to widen the gap between the pair of grippers and tighten the bag mouth, and then the pair of presses The plate is separated from the bag, and the width direction of the packaged object in the bag is Bag packaging method characterized by changing the parallel direction. In the opening process of the bag mouth, the bag surface is sucked from both sides by a pair of suction members, and then the distance between the pair of suction members is widened and the distance between the pair of grippers is narrowed. 4. The bag-filled packaging according to claim 3, wherein after being opened to form a long opening shape in the direction, the suction by the pair of suction members is stopped to release the bag surface from the pair of suction members. Method. The posture of the bag gripped by the pair of grippers is, in the process of being transferred along the transfer path, the vertical position with the bag opening facing upward and the bag opening horizontal with the bag opening horizontal. It changes between the horizontal positions, wherein the bag takes a horizontal position when the process of filling the package is performed, and the bag takes a vertical position when the process of shaping the package in the bag is performed. The bag-filling and packaging method according to claim 3 or 4, wherein: A plurality of sets of a pair of grippers arranged along a predetermined moving path, intermittently moving along the moving path, capable of gripping both side edges of the bag, and widening or narrowing the interval on the moving path. A bag transfer device, a bag supply device that is installed near a bag supply position that is a stop position on the movement path, and supplies a bag to a pair of stopped grippers, and a bag that is a stop position on the movement path. An opening that is provided near the mouth opening position and that includes a pair of suction members that are opposed to each other and that can be brought into contact with and separated from each other, and that opens the bag mouth by sucking both sides of the bag held by the pair of grippers with the suction members; A device, a filling device installed near the filling position of the package, which is a stop position on the moving route, and inserting the packaged product into the bag through the bag mouth, and a bag mouth seal, which is the stopping position on the moving route, Installed near the location, In a bag-filling and packaging machine provided with a sealing device for sealing a bag opening of a filled bag, the shaping is further provided near a shaping position, which is a stop position on the moving path, to shape an article to be packaged in the bag. A filling device, wherein the filling device is inserted with the width direction of the article to be packaged parallel to the thickness direction of the bag, and the shaping device comprises a pair of press plates opposed to both surfaces of the bag stopped at the shaping position. And a drive mechanism for moving the pair of press plates toward or away from each other and moving the pair of press plates in the width direction of the bag in opposite directions to each other. A bag packing machine characterized by changing the direction parallel to the direction. The bagging and packaging machine according to claim 6, wherein the opening device is configured to open the bag mouth in a thickness direction of the bag to have an opening shape long in the direction. In the process of moving the pair of grippers along the movement path, the bag transfer device changes the posture of the bag held by the pair of grippers from the vertical position with the bag opening upward to the side of the bag opening. It is possible to change the width direction of the bag toward a horizontal posture oriented horizontally, and from the horizontal posture to the vertical posture, and the bag held by the pair of grippers takes a horizontal posture at the packing object filling position. 8. The bag-filling and packaging machine according to claim 6, wherein the shaping position takes a vertical posture. The bag transfer device includes a plurality of retainers that move along a trajectory in a horizontal plane, a posture changing cam and a gripper swing cam installed on a machine of the bag packing machine, and each of the retainers is a moving frame. And a swing frame that is swingably supported by each moving frame and has a horizontal swing axis, the pair of grippers is installed on each swing frame, and the retainer is installed on the moving frame. A bag attitude changing mechanism that is connected to the swing frame and swings the swing frame at an angle of 90 °, and is installed on the moving frame, swings the pair of grippers, and adjusts a distance between the pair of grippers. A gripper opening / closing mechanism for expanding or narrowing, the bag attitude changing mechanism is swingably supported by the moving frame, and the swing axis is parallel to the swing axis of the swing frame. A first cam lever, a first cam roller rotatably installed at a free end of the first cam lever, and a first connecting mechanism for connecting the first cam lever and the swing frame, wherein the first cam roller changes the posture. The gripper opening / closing mechanism is supported by the moving frame so as to be swingable, the swinging shaft is horizontal, and the swinging frame is swung. A second cam lever in a plane perpendicular to an axis, a second cam roller rotatably installed at a free end of the second cam lever, and a second connection mechanism for connecting the second cam lever and the gripper; 9. The packaging machine according to claim 8, wherein a second cam roller contacts a cam surface of the gripper swing cam and is displaced as the moving frame moves. . A first swing arm swinging in accordance with the displacement of the first cam roller; a first swing arm having one end connected to the first swing arm; and a first swing arm having the other end connected to the swing frame. The bag packing machine according to claim 9, further comprising a connecting rod, wherein the first swing arm and the first connecting rod constitute a toggle mechanism. In a shaping device that is installed in a bag-filling and packaging machine and shapes a packaged object filled in a bag by sandwiching the bag from both sides, a pair of press plates arranged opposite to each other and the pair of press plates A drive mechanism for moving the bag in the width direction of the bag in a direction opposite to each other while changing the width of the packaged object from a direction parallel to the thickness direction of the bag to a direction parallel to the width direction of the bag. A shaping device characterized by performing. A first lever provided rotatably about a vertical first axis, and a second lever provided rotatably about a vertical second axis separated by a predetermined distance from the first axis; And a drive source connected to the first lever for rotating the first lever back and forth by a predetermined angle about the first axis; and a drive source connected to the first and second levers, together with the first and second levers. A connecting member that constitutes a parallel link mechanism; two support members that are installed on the first lever so as to be rotatable around vertical axes located on both sides of the first shaft; It comprises two support members installed rotatably about a vertical axis located on both sides of the axis, a rectangle having the axes of the four support members as vertices in a horizontal plane forms a parallelogram, and the pair of Press plates, each of which is provided on the first lever The shaping device according to claim 11, wherein the shaping member is fixed to a support member installed on the second lever, and is disposed parallel to each other on both sides of a vertical plane passing through the first axis and the second axis. apparatus.

Images