JP4446155B2 - Gripper and container transport system with gripper - Google Patents

Description

The present invention relates to a gripper and a container transport system including the gripper, and more particularly to a gripper that transports the container while sandwiching the neck of the container, and a container transport system including the gripper.

2. Description of the Related Art Conventionally, a gripper that holds a neck of a resin container such as a PET bottle so as to suspend and support the container, and a transport system for a container that includes such a gripper and transports the container between different grippers are known. (For example, Patent Document 1 and Patent Document 2).
In such a conventional gripper, the container is stably held by providing support means having an arc shape corresponding to the diameter of the neck portion of the container or by forming the gripping portion of the gripper in an arc shape. It has become.
Special table 2003-502238 gazette Special Table 2002-540027

By the way, when the type of the container to be held is changed, the height of the container and the outer diameter of the body part are changed, but the diameter of the neck part is generally not changed greatly. Therefore, in the above-described conventional gripper and transport system, it has not been assumed to hold containers having different neck diameters.
Recently, however, since wide neck containers with a large neck diameter have begun to spread, there is a demand for a gripper that can be used for a plurality of types of containers having different neck diameters and a container transport system including the gripper. is there.

In view of the above-described circumstances, the first aspect of the present invention described in claim 1 includes a pair of holding members that sandwich the neck portion of the container formed with the flange below the flange, and is provided on the rotating wheel. In the gripper that transports the container in the rotating direction in a suspended state,
Each of the pair of holding members is provided with an abutting member that abuts on the threaded portion above the flange, and each abutting member of the rotating wheel with the movement locus of the opening center of the mouth of the container as a boundary. It is characterized in that it can come into contact with the threaded portion from the radially inner side and the outer side.
According to a second aspect of the present invention, the first conveying means having a first gripper for clamping the neck portion of the container formed with the flange on the upper side of the flange, and the lower side of the flange. In a container transport system that includes a second transport unit including a rotating wheel having a second gripper to be sandwiched, and is configured to deliver a container from one gripper to the other gripper at a delivery position.
The first gripper is configured to clamp a portion between the flange and the screw portion above the flange, and the second gripper includes a pair of holding members clamped on the lower side than the flange. A contact member that is provided on each holding member and contacts a threaded portion above the flange, and each contact member of the rotating wheel with the movement locus of the opening center of the mouth of the container as a boundary. It is characterized in that it can come into contact with the threaded portion from the radially inner side and the outer side .

According to the gripper of the first aspect of the present invention described above, the holding member that holds the neck portion of the container below the flange is provided, and the holding member is provided with the contact member that contacts the screw portion of the container. Therefore, the position of the abutting member changes according to the degree of opening of the gripper corresponding to the diameter of the neck, and the abutting member abuts against the threaded portion of the container regardless of the diameter of the neck, thereby preventing the held container from tilting. Can do. Therefore, containers having different neck diameters can be stably held.
According to the container transport system of the second aspect of the present invention described above, the second gripper has a pair of holding members that hold the neck portion of the container below the flange, and a screw portion of the container provided on the holding member. Since the first gripper is configured to hold the portion between the flange and the threaded portion, it is possible to stably hold containers having different neck diameters. The container can be delivered between these first gripper and second gripper without any trouble.

  Hereinafter, the present invention will be described with reference to the illustrated embodiment. In FIG. 1, reference numeral 1 denotes a transfer system for a container 2. A rotary type filler 3 as a container processing device, an introduction wheel 5 that delivers an empty container 2 supplied by a supply conveyor 4 to the filler 3, and a filled container 2 that is received from the filler 3 to a discharge conveyor 6. It is configured as a filling line that is provided with a delivery discharge wheel 7 and delivers the container 2 between a plurality of rotating wheels that hold the container 2 at the outer periphery, and performs filling while continuously feeding the container 2.

The container 2 that is transported and processed by the transport system 1 in the present embodiment is a resin container such as a PET bottle filled with a beverage as shown in FIG. 2B and a cylindrical neck portion 2A formed on the upper side thereof. The neck portion 2A includes an upper screw portion 2a in which a male screw is formed, and a flat plate-like flange 2b which is located on the lower side with a gap from the screw portion 2a and protrudes from the outer peripheral surface of the neck portion 2A. Yes. Further, the neck portion 2A on the lower side of the flange 2b is expanded from a cylindrical shape to a trunk portion 2B.
The upper end of the neck portion 2A is a mouth portion 2c. By screwing a cap (not shown) into the screw portion 2a, the mouth portion 2c comes into close contact with a sealing member provided on the top surface of the cap, and the inside of the container 2 Can be sealed.

As shown in FIG. 3, in the transport system 1 of the present embodiment, the neck 2A of the container 2 is held and transported in a suspended state, and the neck 2A above the flange 2b of the container 2 is transported. The introduction wheel 5 having the first gripper 8 that constitutes the first conveying means constitutes the first conveying means, and the filler 3 having the second gripper 11 that holds the neck 2A below the flange 2b of the container 2 is the first. Two conveying means are configured. Further, similarly to the introduction wheel 5, the discharge wheel 7 has a first gripper 8 that sandwiches the neck portion 2 </ b> A above the flange 2 b of the container 2 and constitutes a first conveying means. The container 2 is transferred by transferring the container 2 from the first gripper 8 to the second gripper 11 or from the second gripper 11 to the first gripper 8 at the reception position A and the transfer position B, which are transfer positions. A system 1 is configured.
In this embodiment, the supply conveyor 4 and the discharge conveyor 6 are constituted by an air conveyance conveyor for propelling the container 2 that is supported by being suspended by engaging a flange 2b on a pair of rails (not shown). ing.

In the conveyance processing system 1 configured as described above, when the introduction wheel 5, the filler 3, and the discharge wheel 7 are driven in synchronization by a driving source (not shown) and rotated in the direction of the arrows in FIG. The first gripper 8 provided in the introduction wheel 5 as the conveying means receives the empty container 2 supplied by the supply conveyor 4 while sandwiching it at the introduction position C. And the container 2 clamped by the 1st gripper 8 is conveyed to a rotation direction with rotation of the introduction wheel 5, and is delivered to the 2nd gripper 11 with which the filler 3 is provided in the receiving position A (FIG. 3 shows this). It shows the state at the time of delivery.)
The container 2 sandwiched between the second grippers 11 at the receiving position A is transported in the direction of rotation opposite to the introduction wheel 5 by the rotation of the filler 3 and is placed by a filling nozzle 12 provided for each second gripper 11. A fixed amount of filling liquid is filled and delivered to the first gripper 8 provided in the discharge wheel 7 at the delivery position B. The filled container 2 sandwiched between the first grippers 8 of the discharge wheel 7 at the delivery position B is conveyed in the direction of rotation opposite to the filler 3 by the rotation of the discharge wheel 7, and to the discharge conveyor 6 at the discharge position D. It is supposed to be discharged.

As shown in FIG. 3 and FIG. 4, the introduction wheel 5 as the first conveying means is arranged at a circumferentially equidistant position in the outer periphery of the first wheel 13 rotated on a horizontal plane and the first wheel 13. A plurality of first grippers 8 and a cam mechanism 14 for opening and closing the first grippers 8 are provided.
The first gripper 8 includes a pair of first holding members 15a and 15b, and a base portion of one holding member 15a is attached to an upper end portion of a rotary shaft 16 that is rotatably provided on the first wheel 13, The base portion of the other holding member 15 b is attached to the upper end portion of the rotating shaft 17 that is rotatably provided on the first wheel 13.
In addition, the holding member 15a and the holding member 15b are connected to each other by a pin 18 that is formed by overlapping the side protrusions formed at the bases and penetrating through a long hole provided in the protrusion. When 15b is rotated about the rotation shaft 17, the pin 18 moves back and forth in the radial direction of the first wheel 13, and the holding member 15a is opposite to the holding member 15b about the rotation shaft 16 along with this. The holding members 15a and 15b are opened and closed in conjunction with each other.
A lever 23 is connected in the horizontal direction to the lower end portion of the rotary shaft 17 to which the holding member 15b is attached, and a tension spring 25 is provided between the lever 23 and the support pin 24 fixed to the first wheel 13. It has been. By this tension spring 25, the rotating shaft 17 is urged so that the tip of the holding member 15b approaches the holding member 15a, and the holding member 15a connected by the pin 18 also makes the tip approach the holding member 15b. Be energized by. As a result, the holding members 15a and 15b of the first gripper 8 are always urged in the closing direction, and the urging force holds the neck 2A of the container 2 so as to hold the neck 2A having different diameters. can do.
One holding member 15a is provided with a stopper 26 that regulates the approaching amount of the holding member 15a and the holding member 15b.

A cam follower 27 is rotatably attached to the tip of the lever 23, and a cam for opening and closing the first gripper 8 at the introduction position C and the receiving position A shown in FIG. The member 28 is arranged over a predetermined range.
The cam surface 28A that engages with the cam follower 27 in the cam member 28, when releasing the sandwiched container 2 such as the receiving position A, is moved backward inward in the radial direction of the first wheel 13. The cam follower 27 is swelled radially outward from the state in which the lever 23 is not engaged, and the moving cam follower 27 is engaged to force the lever 23 against the tension spring 25 to push out radially outward. Is formed. Thereby, the 1st gripper 8 moved with rotation of the 1st wheel 13 is open | released from a closed state, and the container 2 clamped is released.
When the container 2 is sandwiched as in the introduction position C, the cam surface 28A is bulged outwardly in the radial direction of the first wheel 13 as described above, and the first gripper 8 is opened to the maximum. From this state, the cam surface 28A is gently retracted radially inward until the cam surface 28A is not engaged with the cam follower 27 so that the cam surface 28A is gradually closed. The cam follower 27 is pressed against the cam surface 28A by the urging force of the tension spring 25, and the lever 23 is pulled inward from the radially outer side following the retreat of the cam surface 28A, so that each first gripper 8 is gradually moved. The container 2 is sandwiched between them. In FIG. 4, a part of the cam member 28 corresponding to the receiving position A is shown, and the shape of the cam member 28 corresponding to the introduction position C is not shown. When used as the discharge wheel 7, the cam member 28 having the same shape as the introduction position C is used at the delivery position B, and the cam member 28 having the same shape as the reception position A is used at the discharge position D.
As can be understood from the above description, in this embodiment, the cam follower 27 and the cam member 28 constitute the cam mechanism 14.

When the first gripper 8 is opened / closed by the cam mechanism 14, the container 2 of the first gripper 8 at the receiving position A and the introduction position C in both cases where the diameter of the neck 2A is large and small. Therefore, it is necessary to make the release start position and the pinching start position different from each other.
That is, the smaller the diameter of the neck 2 </ b> A of the holding container 2 is, the smaller the opening degree of the first gripper 8 is, and the cam follower 27 is positioned closer to the inner side in the radial direction of the first wheel 13. Therefore, if the position of the cam member 28 is the same in the case of the large diameter and the case of the small diameter, the cam follower 27 comes into contact with the cam surface 28A earlier in the case of the small diameter, so that the container is positioned before the predetermined delivery position. 2 will be released. Therefore, when the neck 2A of the holding container 2 has a small diameter, the portion where the cam surface 28A of the cam member 28 is bulged is compared with the direction in which the first gripper 8 travels, as compared with the case where the neck 2A has a large diameter. It is necessary to match the position where the first gripper 8 starts the releasing operation to the delivery position by being positioned downstream. Further, when the container 2 is sandwiched between the first gripper 8 and the cam member 28 in the same position for the large diameter and the small diameter, the first gripper 8 is gradually opened after the first gripper 8 is fully opened. While being operated to close, the container 2 is held faster when the diameter is large, and is slower than this when the diameter is small. Therefore, when the neck portion 2A of the container 2 to be sandwiched has a small diameter, the portion where the cam surface 28A of the cam member 28 bulges is upstream of the first gripper 8 in the traveling direction, compared to the case where the neck portion 2A has a large diameter. It is necessary to match the position where the first gripper 8 starts the nipping operation to the delivery position.
In view of such circumstances, in this embodiment, the cam member 28 can be moved forward and backward in the direction of travel of the first gripper 8, and the position is adjusted, so that the first gripper 8 starts releasing and holding the container 2. The position can be changed.
In other words, a disc-shaped support member 31A is provided on the outer peripheral surface of the cylindrical fixed body 31 that rotatably supports the first wheel 13, and a long length in the rotation direction of the first wheel 13 is provided on the outer peripheral portion of the support member 31A. A hole 31B is formed, a connecting bolt 32 is inserted into the elongated hole 31B from below, and the tip thereof is screwed into a screw hole 28B provided in the cam member 28, thereby fixing the cam member 28 to the support member 31A. I am doing so.
With such a configuration, the fixing position of the cam member 28 can be changed before and after the first gripper 8 in the range of the long hole 31B.
The mechanism for adjusting the position of the cam member 28 is not limited to this, and can be automated using a known drive mechanism, and the release start position and the nipping start position of the container 2 by the first gripper 8. In addition to moving the cam member 28 back and forth in the advancing direction of the first gripper 8, the means for changing the cam member 28 is arranged so that the position of the cam surface 28A of the cam member 28 moves toward and away from the cam follower 27. It is also possible to move the wheel 13 back and forth in the radial direction.

  The pair of holding members 15a and 15b provided in the first gripper 8 have engaging portions 15A each having a substantially V-shape as viewed from above as shown in FIG. Is formed. The engaging portion 15A can be engaged with the neck portion 2A of the container 2 to be sandwiched, and the first gripper 8 can connect the neck portion 2A of the container 2 with the flange 2b above the flange 2b by the engaging portion 15A. The container 2 is held between the threaded portions 2a to support the container 2 in a suspended state. In this way, the holding surface of the container 2 is not substantially an arc shape corresponding to the diameter of the neck portion 2A as in the prior art, but is substantially V-shaped, so that even if the diameter of the neck portion 2A is different, the container 2 Before and after the traveling direction, from the radially inner side and the outer side of the first wheel 13 to the outer peripheral surface of the neck portion 2A, with the movement locus of the opening center of the mouth portion 2c of the container 2 (see the one-dot chain line E in FIG. 4) as a boundary. The engaging portion 15A can be brought into contact with and engaged with each other, and the container 2 can be stably held. Accordingly, the first gripper 8 can be used also for the containers 2 having different diameters of the neck portion 2A.

Next, as shown in FIGS. 3, 5, and 6, the second conveying means configured as the filler 3 includes a second wheel 34 that rotates in a direction opposite to the first wheel 13 in the horizontal plane, A plurality of second grippers 11 provided at equal circumferential positions in the outer circumferential portion of the two wheels 34 are provided. In addition, although the position of the filling nozzle 12 is shown in FIG. 3, detailed description as a filler shall be omitted.
The second gripper 11 includes a pair of support blocks 39, 39 disposed on the second wheel 34 at equal intervals in the circumferential direction, and a pair of support blocks 39, 39 provided in pairs via leaf springs 35, 35. Two holding members 21 and 21 and a coil spring 36 provided between the pair of holding members 21 and 21 and biasing them in a direction approaching each other. The second gripper 11 is configured to open and close the pair of holding members 21 and 21 by the flexibility of the leaf spring 35, and includes a sliding portion such as a rotating shaft like the first gripper 8. It is easy to clean and has excellent sanitary properties.

  The front end portion 39A of the support block 39 is located between the base portions 21A of the holding members 21 and 21 that make a pair, and comes into contact with the base portion 21A, thereby restricting the movement of the holding members 21 toward each other. ing. The leaf spring 35 is attached over the base end portion 39B of the support block 39 and the base portion 21A of the holding member 21, and both the leaf springs 35 and 35 are in a state where the base portion 21A is in contact with the tip end portion 39A. It is attached to the base 21 so as to be bent away from the attachment width at the base end 39B. As a result, the leaf spring 35 acts to press the base portion 21A against the distal end portion 39A, and urges the holding members 21 and 21 paired with the coil spring 36 in the closing direction. The second gripper 11 clamps the neck 2A of the container 2 by the urging force of these spring means, and can clamp the neck 2A having different diameters.

  The holding member 21 includes a thick base portion 21A located on the radially inner side of the second wheel 34, and a thin wall portion 21B located on the radially outer side and made thinner than the base portion 21A. On the opposing surfaces of the thin portion 21B in the pair of holding members 21, 21, engagement portions 21C having a substantially V shape as viewed from above are formed. Further, the opposed surface of the thin wall portion 21B on the tip side of the engaging portion 21C is spaced from the pair of holding members 21 and 21 toward the inner side from the radially outer side of the second wheel 34. The guide portion 21D is formed to be narrowed. The engaging portion 21C can be engaged with the neck portion 2A of the container 2 to be clamped, and the second gripper 11 clamps the neck portion 2A of the container 2 below the flange 2b by the engaging portion 21C. In the sandwiched state, the flange 2b can be supported from the lower side on the upper surface of the thin portion 21B. Further, by pushing the neck portion 2A from the outside between the guide portions 21D of the holding members 21 and 21 in the closed state, both the holding members 21 and 21 are resisted against the urging force of the leaf spring 35 and the coil spring 36. The neck 2A can be sandwiched between the engaging portions 21C. In this way, the neck 2A is held between the second gripper 11 and the container 2 is held and transported in a suspended state.

Further, the second gripper 11 includes a plate-like contact member 22 that comes into contact with the threaded portion 2 a of the container 2. The abutting member 22 is provided with an end portion fixed to the upper surface of the base portion 21A of each holding member 21, and a predetermined gap is formed above the thin-walled portion 21B so as to protrude in the horizontal direction. The positional relationship in the height direction of the contact member 22 with respect to the thin portion 21B is such that the contact member 22 can contact the threaded portion 2a when the holding member 21 holds the neck 2A on the lower side of the flange 2b. It is set as follows. Further, a substantially V-shaped contact portion 22 </ b> B similar to the engagement portion 21 </ b> C formed on the holding member 21 is formed on the opposing surfaces of both contact members 22.
Thereby, when the lower side of the flange 2b in the neck portion 2A of the container 2 is clamped by the engaging portions 21C, 21C of the pair of holding members 21, 21, the contact portions 22B of the both contact members 22, 22 are provided. 22B comes into contact with the threaded portion 2a of the neck portion 2A. The abutting member 22 does not have to hold the screw portion 2a or always abut against the screw portion 2a, and can abut and regulate when the posture of the container 2 is inclined. It may be a thing.

  As described above, the second gripper 11 is formed by forming a substantially V-shaped engaging portion 21 </ b> C that can be engaged with the neck portion 2 </ b> A of the container 2 on the opposing surface of the thin portion 21 </ b> B of the holding member 21. By making the sandwiching surface of the container 2 into a generally V shape instead of an arc shape corresponding to the diameter of the neck 2A as in the prior art, even if the diameter of the neck 2A is different, before and after the traveling direction of the container 2, The engaging portion 21C is provided on the outer peripheral surface of the neck portion 2A from the inner side and the outer side in the radial direction of the second wheel 34 with the movement locus of the opening center of the mouth portion 2c of the container 2 (see the one-dot chain line F in FIG. 5) as a boundary. The containers 2 can be brought into contact with each other and can be stably held. Thereby, it is possible to use the second gripper 11 also for the containers 2 having different diameters of the neck portion 2A. Further, the abutting portion 22B, which is the opposing surface of the abutting member 22, is also formed in a substantially V shape similar to the engaging portion 21C, and moves integrally with the opening / closing operation of the holding members 21 and 21 that make a pair. As with the engaging portion 21C, the large and small neck portions 2A can be brought into contact with the screw portion 2a of the container 2 having a different diameter.

As shown in FIG. 3, the first gripper 8 included in the first transport unit and the second gripper 11 included in the second transport unit configured as described above are configured so that the second gripper 11 flanges the neck 2 </ b> A of the container 2. The first gripper 8 sandwiches the neck portion 2A, which is located above the flange 2b and below the screw portion 2a, between the flange 2b and the screw portion 2a. As described above, the vertical positions of the first wheel 13 that supports the first gripper 8 and the second wheel 34 that supports the second gripper 11 are set.
Further, the first wheel is provided so that the container 2 held by the first gripper 8 can be transferred to the second gripper 11 and the container 2 held by the second gripper 11 can be transferred to the first gripper 8. 13 of the first gripper 8 that is moved in the rotational direction by the pair 13 and the pair of the second gripper 11 that is moved in the rotational direction by the second wheel 34 and the movement path of the engaging portions 15A of the pair of holding members 15a and 15b. The first wheel 13 supporting the first gripper 8 and the first wheel 13 so that the movement paths of the engaging portions 21A of the holding members 21 and 21 overlap each other at the delivery position (the reception position A and the delivery position B in the second transport means). The horizontal position of the second wheel 34 that supports the two gripper 11 is set. Furthermore, the dimension of each part is set so that the holding members 15a and 15b of the first gripper 8, the holding members 21 and 21 of the second gripper 11, and the contact members 22 and 22 do not interfere at the delivery position. The thickness of the engaging portion 15A of the holding members 15a and 15b of the first gripper 8 and the vertical distance between the holding member 21 and the abutting member 22 are determined between the holding member 21 and the abutting member 22. The holding members 15a and 15b are set to dimensions that can be opened and closed. Needless to say, the first conveying means and the second conveying means are configured such that the first gripper 8 and the second gripper 11 are simultaneously positioned at the delivery position in synchronization.

The delivery operation of the container 2 by the first transport unit and the second transport unit arranged as described above will be described. First, when the container 2 supported by being hung and supported by the first gripper 8 is delivered to the second gripper 11, the first gripper 8 having the neck 2A held above the flange 2b and the container 2 are As the second gripper 11 that is not held moves toward the receiving position A of the second transport means configured as the filler 3, the first gripper 8 becomes narrower as the position approaches in the horizontal direction. The holding neck portion 2A is gradually pushed between the guide portions 21D of the pair of holding members 21 and 21 of the second gripper 11, and the holding members 21 and 21 resist the urging force of the leaf spring 35 and the coil spring 36. Pushed open. Thereafter, when both the first gripper 8 and the second gripper 11 reach the receiving position A, the neck portion 2A that the first gripper 8 sandwiches and pushes into the pair of holding members 21 and 21 of the second gripper 11 21 and 21 are held by the lower side of the flange 2b by the engaging portion 21C. At this time, the abutting members 22, 22 provided on the holding members 21, 21 abut so as to sandwich the screw portion 2 a of the container 2.
After reaching the receiving position A, they move away from each other in the horizontal direction, and the first gripper 8 opens the holding members 15 a and 15 b by the action of the cam mechanism 14. As a result, the container 2 is released from the first gripper 8, and the second gripper 11 holds the neck 2A on the lower side of the flange 2b by the urging force of the leaf spring 35 and the coil spring 36, and is supported in a suspended state. It becomes. At this time, regardless of the diameter of the capital 2A held by the first gripper 8, the pair of holding members 21 and 21 of the second gripper 11 are expanded according to the diameter of the neck 2A. The holding members 21 and 21 have a V-shaped engagement portion 21C which is in contact with the inner side and the outer side in the radial direction with respect to the one-dot chain line F shown in FIG. Since 2A is pinched, the container 2 can be hold | maintained stably.

  Further, when the container 2 supported by being suspended by the second gripper 11 is transferred to the first gripper 8, the cam mechanism 14 and the second gripper 11 holding the neck portion 2A below the flange 2b. When the first gripper 8 that has opened the holding members 15a and 15b by the action of the first gripper 8 reaches the delivery position B of the second conveying means, the first gripper 8 closes the holding members 15a and 15b by the action of the cam mechanism 14. The neck portion 2A is held above the flange 2b by the engaging portion 15A by the urging force of the tension spring 25. Thereafter, since the first gripper 8 and the second gripper 11 move away from each other in the horizontal direction, the first gripper 8 resists the urging force of the leaf spring 35 and the coil spring 36 from the second gripper 11 to the neck portion of the container 2. 2A is pulled out, the container 2 is released from the second gripper 11, and the first gripper 8 is in a state of being supported by being suspended while holding the neck 2A on the upper side of the flange 2b. At this time, the engaging portions 15A of the holding members 15a and 15b are also V-shaped in the same manner as the engaging portions 21C of the holding members 21 and 21, so that the one-dot chain line E shown in FIG. Since the neck 2A is held in contact with the radially inner side and the outer side from the front and rear in the traveling direction, the container 2 can be stably held regardless of the diameter of the neck 2A.

The urging force by the leaf spring 35 and the coil spring 36 that closes the second gripper 11 is pushed against the urging force by pushing the neck portion 2A of the container 2 held by the first gripper 8, thereby holding the member 21. , 21 can be pushed open, and the first gripper 8 can grip and pull out the neck portion 2A held by the second gripper 11, It is set smaller than the urging force of the tension spring 25 of the gripper 8.
Further, the second gripper 11 does not need to be provided with a means for opening and closing like the cam mechanism 14 of the first gripper 8, so that the second gripper 11 can flexibly cope with the container 2 having a different diameter of the neck 2 </ b> A. The gripping force cannot be increased like the gripper 11. Therefore, a centrifugal force is generated in the container 2 held by the movement in the rotation direction by the first wheel 13, the trunk portion 2 </ b> B of the container 2 is shaken outward in the radial direction, and the container 2 can be tilted and sufficiently held. In particular, the container 2 that is filled with the filling liquid and has increased in weight is more likely than the empty container 2.
Therefore, in the present invention, the second gripper 11 holds the neck portion 2A on the lower side of the flange 2b, so that the flange 2b is located on the lower side on the upper surface of the thin portion 21B corresponding to the engaging portion 21C portion of the holding member 21. Further, the holding member 21 is provided with an abutting member 22 that abuts on the threaded portion 2a to prevent the container 2 from swinging and tilting by abutting against the threaded portion 2a regardless of the diameter of the neck portion 2A. It is what I did. Further, since the contact portion 22B of the contact member 22 is formed in a V shape, the contact portion 22B contacts the screw portion 2a from the radially inner side and the outer side with the one-dot chain line F shown in FIG. In particular, it is possible to prevent the threaded portion 2a from inclining toward the inward side due to the body 2B being swung radially outward by the centrifugal force by contacting the inward side. . Further, since the contact member 22 is provided on the holding member 21 constituting the second gripper 11, even if the second gripper 11 is used also as the container 2 having a different diameter of the neck portion 2A, the holding member regardless of the size of the diameter. According to the degree of opening of 21 and 21, it can always be made to contact appropriately with screw part 2a.

The second gripper 11 is optimal as a gripper of a weight filler that fills a predetermined amount of filling liquid while measuring the weight of the container 2 as the filler 3.
That is, since all the components of the second gripper 11 are supported by the support block 39, a weight filler can be easily configured by attaching the support block 39 to a weight input portion of a measuring means such as a load cell.
Specifically, as shown in FIG. 7, 3A is a rotary type weight filler, and a plurality of load cells 40 are arranged at equal intervals in the circumferential direction on the outer periphery of the second wheel 34 as in the case of the filler 3. It is arranged. This load cell 40 is provided with a load application rod 40a as a weight input part so as to protrude outward in the radial direction of the second wheel 34, and measures a downward load applied to the load application rod 40a. Yes. And the 2nd gripper 11 is attached toward the radial direction outer side by fixing the support block 39 to this load application rod 40a. In this case, the support block 39 may be integrated instead of the previously described paired form.
Accordingly, the neck 2A of the container 2 is held between the second gripper 11 and the weight of the filling liquid flowing down from the filling nozzle 12 is measured, whereby a predetermined weight can be filled. The other configurations of the second gripper 11 are the same as those already described, and the configuration of the weight filler 3A as the second conveying means is the same as that of the filler 3, so that the detailed description thereof will be described. It is omitted here.

1 is a schematic plan view showing an embodiment of the present invention. The front view of a container. Sectional drawing of the principal part which follows the III-III line | wire of FIG. The top view of the principal part of the introduction wheel 5 shown in FIG. The top view of the principal part of the filler 3 shown in FIG. The enlarged view of the principal part of FIG. Sectional drawing which shows the case where the 2nd gripper 11 is used as a gripper of a weight filler.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Conveyance system 2 ... Container 2A ... Neck part 2a ... Screw part 2b ... Flange 3 ... Filler (2nd conveyance means)
DESCRIPTION OF SYMBOLS 5 ... Introduction wheel (1st conveyance means) 8 ... 1st gripper 11 ... 2nd gripper 15a ... Holding member 15b ... Holding member 15A ... Engaging part 21 ... Holding member 21C ... Engaging part 22 ... Abutting member 22B ... This Junction

Claims (3)

The neck of the container having a flange, Bei example a pair of holding members for clamping at the lower side of the flange, the gripper for conveying the rotation direction in a state suspended is the container provided on the rotating wheel,
Each of said pair of holding members, only set the upper side of the threaded portion and abutting the abutment member than the flange, the abutment member, the rotating wheel of the movement locus of the opening center of the mouth portion of the container has a boundary A gripper characterized by being able to contact the threaded portion from the radially inner side and the outer side .   The gripper according to claim 1, wherein a V-shaped engagement portion that can be engaged with a neck portion of the container is formed on the opposing surfaces of the both holding members. A second transport having a first transport means having a first gripper that sandwiches the neck of the container formed with the flange on the upper side of the flange, and a rotating wheel having a second gripper that is sandwiched on the lower side of the flange. In a container transport system comprising means and delivering a container from one gripper to the other gripper at a delivery position,
The first gripper is configured to clamp a portion between the flange and the screw portion above the flange, and the second gripper includes a pair of holding members clamped on the lower side than the flange. A contact member that is provided on each holding member and contacts a threaded portion above the flange, and each contact member of the rotating wheel with the movement locus of the opening center of the mouth of the container as a boundary. A gripper characterized in that it can come into contact with a threaded portion from the radially inner side and the outer side .

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