JP2010030667A - Receptacle gripping unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a container gripping unit 18 for use in holding a container 4 with a fixing arm 38 and an opening or closing arm 22 to be used for both containers 4A, 4B of different diameters. <P>SOLUTION: This invention relates to a container gripping unit 18 comprising a fixing arm 38, an opening or closing arm 22, a tension coil spring 56 for use in biasing this opening or closing arm 22 toward the fixing arm 38, and a stopper 52 for stopping the opening or closing arm 22 so as to hold a container 4 with the fixing arm 38, and the opening or closing arm 22. Further there is provided a motion guide 40 that can be moved forward or retracted between one position where it is abutted against the container 4 held by the fixing arm 38 and the other position where it is not abutted gainst the container 4, and the motion guide 40 is provided with the stopper 52. In turn, the opening or closing arm 22 is provided with a first engagement part 22b to be engaged with the stopper 52 when the motion guide 40 is kept at its retracting position and a second engagement part 22c to be engaged with the stopper 52 when the motion guide 40 is kept at its forward moving position. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a gripper for holding a container such as a can, and more particularly to a container gripper that can be used for containers having different diameters.

  2. Description of the Related Art Conventionally, a container gripper for a can filler that fills a wide-mouth can with a liquid is known in which a can is held by a fixed arm and an open / close arm (see Patent Document 1). The container gripping device 3 (corresponding to the container gripper of the present invention) described in Patent Document 1 includes a fixed arm 12 fixed on the outer periphery of the rotary table 9 of the rotary filling machine 5 at equal intervals, and a fixed arm. Oscillating arm 4 (corresponding to the opening / closing arm of the present invention) supported slidably by a fulcrum pin 13 provided on 12, a spring 18 urging the oscillating arm 4 in the closing direction, and oscillating. It comprises a stopper 19 for regulating the closing angle of the arm 4, a cam follower 15 as an opening means for opening the swing arm 4 biased in the closing direction, and a fixed cam 16.

  In the container gripping device 3, when the container 1 is transferred from the star wheel 2 to the rotary table 9, the cam follower 15 provided on the swing arm 4 is engaged with the fixed cam 16, and the swing arm 4 is The container 1 is in an open state, and the container 1 is smoothly transferred into the fixed arm 12. When the cam follower 15 comes to a position where it does not engage with the fixed cam 16 as the rotary filling device 5 rotates, the swinging arm 4 is closed by the urging force of the spring 18 and abuts against the stopper 19 so that the container 1 is moved. Grab.

The container 1 is filled while being held by the fixed arm 12 and the swing arm 4, and when the filling is completed, the cam follower 15 is again engaged with the fixed cam 16, and the swing arm 4 is resisted against the spring. Turn in the opening direction. Then, the gripping state of the container 1 by the swing arm 4 is released, and the container 1 can be pushed out onto the discharge conveyor. In the case where the container is gripped by the fixed arm 12 and the swing arm 4 as in the container gripping device 3 described in Patent Document 1, in order to prevent liquid from spilling when the can is discharged. At the same time, the swing arm 4 is opened and pushed out in the tangential direction by the fixed arm 12 to be discharged.
JP-A-10-101193 (page 2-3, FIG. 4)

  When the container gripper is composed of a fixed arm and an opening / closing arm as in the invention described in Patent Document 1, the stop position of the opening / closing arm is changed if the container gripper is used for a plurality of types of containers having different diameters. Since it is impossible to hold the container in a stable posture, it is difficult to use the container for different sizes. For this reason, conventionally, a container gripper is attached and replaced according to the size of the container. In such a conventional configuration, a large number of attachments must be prepared, and the storage location is also required, which is expensive. Moreover, there is a problem that it takes time to replace the attachment.

  According to the present invention, a fixed arm, an opening / closing arm, an urging means for urging the opening / closing arm in a closing direction, and an opening / closing arm urged by the urging means are engaged to regulate a closing position of the opening / closing arm. In the container gripper that includes a stopper and holds the container by the fixed arm and the open / close arm, a movement guide is provided that is movable between a forward position that contacts the container held by the fixed arm and a backward position that does not contact the container. The moving guide is provided with a stopper for restricting the opening / closing arm, and the opening / closing arm has a first engaging portion that engages with a stopper of the moving guide in the retracted position, and a stopper of the moving guide in the advanced position. When holding a large-diameter container, the movable guide is moved to the retracted position, and the container is held by the fixed arm and the opening / closing arm. When holding the containers, by moving the moving guide in the forward position, characterized in that to hold the container by a fixed arm opening and closing arm and the moving guide.

  The container gripper according to the present invention is provided with a moving guide used when holding a small-diameter container in addition to a fixed arm that holds the container together with the opening and closing arm, and the moving guide is attached to the container held by the fixed arm. The moving guide is provided with a stopper for restricting the closing position of the opening / closing arm, and the stopper of the moving guide at the retracted position is provided on the opening / closing arm. When the container gripper is used as a large-diameter container and a small-diameter container by providing the first engaging part to be engaged and the second engaging part to be engaged with the stopper of the moving guide at the forward movement position. In addition, there is no need to replace the attachment, the mold can be changed in a short time, and the work efficiency is improved. In addition, since there is no need to prepare a large number of attachments, there is an advantage that the cost can be reduced and the storage space for the attachments is not necessary.

  A container gripper for holding a container by a fixed arm and an open / close arm that opens and closes toward the fixed arm, and biasing means for biasing the open / close arm in a closing direction, that is, a direction approaching the fixed arm; A stopper that engages the open / close arm biased by the biasing means and regulates the closed position of the open / close arm, and further includes a movement guide in addition to the fixed arm and the open / close arm for holding the container. The moving guide is configured to be movable between a forward position that contacts the container held by the fixed arm and a retracted position that does not contact, and a stopper that regulates the open / close arm is provided on the moving guide. A first engagement portion that engages with the stopper when the movement guide is in the retracted position, and a second engagement that engages with the stopper when in the forward position. When holding a large-diameter container, the moving guide is moved to a retracted position where it does not contact the container, the container is held by the fixed arm and the open / close arm, and the small-diameter container is held. In this case, the moving guide is moved to the forward position where it abuts the container, and the container is held by the fixed arm, the opening / closing arm and the moving guide, so it is necessary to replace the attachment according to the size of the holding container. It achieves the purpose of changing the mold with a simple operation.

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. FIG. 1 is a plan view showing the overall arrangement of a rotary weight filler provided with a container gripper according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view showing one of the container grippers provided in the rotary weight filler. FIG. The containers 4 conveyed by the container conveying conveyor 2 are supplied to a rotary weight filler 8 via a supply wheel 6. A plurality of container mounting tables 12 are provided on the outer periphery of the rotating body 10 of the weight filler 8 at equal intervals in the circumferential direction. The container mounting table 12 is attached to a radially outer side (left side in FIG. 2) of the rotating body 10 on a base 34 (hereinafter referred to as a first base) disposed on the outer peripheral portion of the rotating body 10. The container 4 is supplied from the supply wheel 6 onto the container mounting table 12. The first base 34 provided with the container mounting table 12 is connected to the load cell 15, and the weight of the container 4 supplied onto the container mounting table 12 is measured by the load cell 15. A container gripper 18 is disposed radially inward of the rotating body 10 on the same first base 34 as the container mounting table 12, and grips the container 4 supplied from the supply wheel 6 onto the container mounting table 12. To do. Although not shown in FIG. 2, the rotation center O1 of the rotary body 10 of the rotary weight filler 8 is located in the right direction of FIG.

  A gripper release cam 20 is disposed at a supply position A of the container 4 from the supply wheel 6 to the weight filler 8 and opens an opening / closing arm 22 of the container gripper 18 described later. When the container 4 is inserted into the container gripper 18 from the supply wheel 6 with the opening / closing arm 22 open, and then the opening / closing arm 22 is closed after passing through the gripper release cam 20, the container gripper 18 grips the container 4 Is done. While the container 4 on the container mounting table 12 is held by the container gripper 18 and rotated and conveyed along with the rotation of the rotating body 10, from a filling nozzle (not shown) provided above each container mounting table 12. The container 4 is filled with a liquid. This apparatus is a rotary weight filler 8, and the container 4 supplied on the container mounting table 12 is filled with a predetermined amount of liquid after the tare is measured by the load cell 15.

  The filled container 4 reaches the container discharge position B of the weight filler 8. An exit-side gripper release cam 24 is disposed at the container discharge position B, and the gripper release cam 24 opens the opening / closing arm 22 of the container gripper 18. A discharge conveyor 26 extending in the tangential direction of the rotating body 10 of the weight filler 8 is arranged adjacent to the container discharge position B, and a container take-out mechanism 32 is arranged along the discharge conveyor 26. . The container take-out mechanism 32 has a plurality of claws 30 attached at equal intervals to a chain 28 arranged in parallel with the discharge conveyor 26 and circulates. From the container gripper 18 with the open / close arm 22 open, The claw 30 takes out the container 4 and discharges it onto the discharge conveyor 26, and conveys the container 4 together with the discharge conveyor 26. Thereafter, the container 4 is sent to the next step by the transfer conveyor 26.

  Next, the container gripper 18 will be described with reference to FIGS. 3 is a plan view of the container gripper 18. The upper (a) diagram shows a state in which a large-diameter container (large-diameter can 4A) is held, and (b) the figure shows a small-diameter container (small-diameter). The can 4B) is held. The container mounting table 12 is mounted on the first base 34 connected to the load cell 15 on the radially outer side (the left side in FIGS. 2 and 3) of the rotating body 10, and further, the first base 34. A container gripper 18 is provided on the inner side in the radial direction of the rotating body 10. In this embodiment, the container gripper 18 includes a fixed arm 38, an opening / closing arm 22, and a movement guide 40.

  In the fixing arm 38, two plates 38A and 38B are arranged at an interval in the vertical direction, and two places on the side far from the container mounting table 12 (the right side in FIGS. 2 and 3) are fixed by bolts 42. Yes. The container holding surface 38a of the fixed arm 38 has an arc shape with an inner diameter that substantially matches the outer diameter of the large-diameter container 4A gripped by the container gripper 18 according to this embodiment. The end 38b (upper part in FIG. 3) is long (extends radially outward of the rotating body 10), and the end 38c on the front side in the rotational direction is shorter than the rear end 38b. The container holding surface 38a of the fixed arm 38 is configured to hold almost a half circumference when the large-diameter container 4A is accommodated. An arrow R in FIG. 3 indicates the direction of rotation of the rotating body 10 of the weight filler 8.

  A moving guide 40 is disposed in the middle of the fixed arm 38 composed of two upper and lower plates 38A and 38B. The movement guide 40 is used in a fixed state during the operation of the weight filler 8, but can be adapted to different containers 4 by moving when the size of the container 4 is switched. The moving guide 40 is a lever that can be rotated around a fulcrum pin 44 (see FIG. 3), and is fixed to the inner surface side of the side wall 10a (see FIG. 2) of the rotating body 10 with the outer side in the radial direction. The air cylinder 46 is rotated. Two upper and lower connecting bars 48 (48A, 48B) are connected to the piston rod 46a of the air cylinder 46 so as to be relatively rotatable, and the other end of these connecting bars 48 has a connecting pin 41 on the back side of the moving guide 40. It is connected so that relative rotation is possible. An arc-shaped long hole 38d is formed in the fixed arm 38, and a connecting pin 41 for connecting the connecting bar 48 and the moving guide 40 is fitted in the long hole 38d. When the movement guide 40 is moved forward and backward by the operation of the air cylinder 46, the connecting pin 41 is guided and moved by the elongated hole 38d. The upper and lower connecting bars 48 (48A, 48B) are connected to the upper and lower surfaces of the moving guide 40 and slidably contact the inner surfaces of the upper and lower first fixed arms 38 (38A, 38B).

  An arc-shaped container holding surface 40b formed near the rotation end 40a of the movement guide 40 (upper side in FIG. 3) is a small-diameter container 4B filled with liquid by the weight filler 8 (FIG. 3B). It has an inner diameter that substantially matches the outer diameter of the small diameter can. When holding the large-diameter container (the large-diameter can shown in FIG. 3A), the movement guide 40 is retracted by the operation of the air cylinder 46, and the container holding surface 40b is moved to the container holding surface 38a of the fixed arm 38. It is made to position behind (position shown in Drawing 3 (a)). Therefore, the movement guide 40 does not contact the container 4 held by the fixed arm 38 and the opening / closing arm 22. On the other hand, when holding the small-diameter container 4B, the movement guide 40 is moved forward to move the container holding surface 40b to a position where it contacts the container 4B held by the fixed arm 38 and the open / close arm 22 (FIG. 3). (Position shown in (b)). At this time, the container 4B is held by the three members of the fixed arm 38, the opening / closing arm 22, and the movement guide 40.

  A vertical rotation shaft 50 is rotatably supported through the two upper and lower plates 38A and 38B at a substantially central portion of the fixed arm 38 on the front side (lower side in FIG. 3) of the rotating body 10 in the rotation direction R. Has been. One end of the opening / closing arm 22 is attached to the rotating shaft 50 so as to be rotatable. The tip 22a of the open / close arm 22 is curved toward the container 4 to be held (see FIG. 3). The front end portion 22a of the open / close arm 22 is located on the opposite side of the container holding surface 38a of the fixed arm 38 with respect to the mounting position of the container 4 on the container mounting table 12, and the open / close arm 22 is placed on the container mounting surface. When rotating toward the center of the mounting table 12, the inner surface side of the tip 22 a comes into contact with the outer surface of the container 4 (4 </ b> A or 4 </ b> B), and the container 4 on the container mounting table 12 together with the container holding surface 38 a of the fixed arm 38. (4A or 4B) can be retained.

  A notch 40c extending inward is formed near the end of the moving guide 40 on the fulcrum pin 44 side (see FIG. 5), and a vertical stopper pin 52 is attached in the notch 40c. The notch 40c is formed at the same height as the opening / closing arm 22, and stops the movement of the opening / closing arm 22 when the opening / closing arm 22 rotates in the closing direction and contacts the stopper pin 52. Can do. On the other hand, a step portion is formed on the inner surface side (the container 4 side to be held) of the open / close arm 22, and the portion 22b (hereinafter referred to as the first engagement portion) near the rotating shaft 50 is high, and the portion 22c near the tip portion. (Hereinafter referred to as the first engagement portion) is low (see FIGS. 3A, 3B, and 4), and the first engagement is determined by the movement position of the movement guide 40 provided with the stopper 52. One of the joining portion 22b and the second engaging portion 22c engages with the stopper 52, and the rotation of the opening / closing arm 22 in the closing direction is restricted. When the movement guide 40 is in the retracted position (the state shown in FIG. 3A), the first engaging portion 22b on the higher side of the stepped portion of the opening / closing arm 22 hits the stopper pin 52, and the opening / closing arm 22 is further moved. Restrict movement in the closing direction. Conversely, when the movement guide 40 is in the advanced position (the state shown in FIG. 3B), the second engagement portion 22c on the lower side of the stepped portion of the opening / closing arm 22 hits the stopper pin 52, and the opening / closing arm Restricts further movement of 22 in the closing direction. In this way, by restricting the closing position of the open / close arm 22 by the stopper pin 52, the container 4 is prevented from being deformed due to excessive force.

  The rotating shaft 50 to which the open / close arm 22 is attached extends downward through the first base 34, and an intermediate portion of the swing lever 54 is connected to a lower end portion thereof (see FIG. 2). Accordingly, when the swing lever 54 swings, the rotary shaft 50 rotates integrally, and the opening / closing arm 22 attached to the upper portion of the rotary shaft 50 rotates. The rotary shaft 50 is connected to the swing lever 54 at a position approximately 1/3 from one end 54a (the right end in FIGS. 2 and 6). One end of a tension coil spring 56 is connected to an end portion 54 b of the swing lever 54 far from the rotation shaft 50. The other end of the tension coil spring 56 is connected to a spring mounting pin 58 (see FIG. 5) fixed to the lower surface of the first base 34, so that the opening / closing arm 22 is always closed (the container holding surface of the fixed arm 38). 38a (direction approaching 38a).

  A rocking lever 62 (hereinafter referred to as a second rocking lever) is disposed adjacent to the rocking lever 54 (hereinafter referred to as a first rocking lever) and at a lower height. (See FIGS. 2 and 6). The second swing lever 62 is disposed below the first base 34 and is on the second base 35 fixed to the wall surface 10 a of the rotating body 10. An intermediate portion bent in a square shape is supported on a fulcrum pin 64 fixed to the side, and can be rotated in a horizontal plane. A cam follower 66 is attached to an end (the left end in FIGS. 2 and 6) of the second swing lever 62 facing the radially outward side of the rotating body 10. Further, an upright pin 68 (hereinafter referred to as a drive pin) is attached to the other end portion of the second swing lever 62, and one end of a tension coil spring 70 is connected to the lower end of the drive pin 68. Yes. The other end of the tension coil spring 70 is connected to a spring mounting pin 72 fixed on the lower second base 35 (see FIG. 5).

  A gripper release cam 20 is provided at the container supply position A from the supply wheel 6 to the weight filler 8, and a gripper release cam 24 is also provided at the container discharge position B from the weight filler 8 to the discharge conveyor 26. Yes. These gripper release cams 20 and 24 are located on the radially outer side of the rotating body 10 of the first base 34 and the second base 35 to which the container gripper 18 is attached (see the left side of FIG. 2). A cam follower 66 attached to the other end of the second swing lever 62 with one end pulled by the tension coil spring 70 is urged toward the gripper release cams 20 and 24. When the cam follower 66 is pushed toward the inner side of the bases 34 and 35 by the gripper releasing cams 20 and 24 (see the cam follower indicated by reference numeral 66 by a two-dot chain line in FIG. 6), the second swing lever 62 rotates around the fulcrum pin 64 (rotates clockwise in FIG. 6). Then, the drive pin 68 attached to the end opposite to the cam follower 66 of the second swing lever 62 and connected to the tension coil spring 70 moves downward in FIG. 6, and the first swing lever 54 is moved. Press the side of the. The first swing lever 54 pushed by the drive pin 68 rotates in the counterclockwise direction of FIG. 6 around the rotation shaft 50 (a first reference numeral 54 is attached by a two-dot chain line in FIG. 6). (See rocking lever).

  As the first swing lever 54 rotates, the rotating shaft 50 and the opening / closing arm 22 rotate. The open / close arm 22 rotates in the same direction as the first swing lever 54 (counterclockwise direction in FIG. 3) via the rotation shaft 50, and the container gripper 18 is opened (FIG. 3A). (See (b) Opening / closing arm denoted by reference numeral 22 with a two-dot chain line). When the cam follower 66 passes through the position where the gripper releasing cams 20 and 24 are installed and is pulled by the tension coil spring 70 and returns to the original position, the drive pin 68 moves backward from the first swing lever 54. Then, the first swing lever 54 is pulled back by the tension coil spring 56, and the opening / closing arm 22 is moved to the first engagement portion 22 b or the first position according to the position of the stopper 52 provided on the movement guide 40. 2 The engaging portion 22c engages and stops. By dividing the swing lever for rotating the rotating shaft 50 into the first swing lever 54 and the second swing lever 62, even if the first swing lever 54 is overloaded, the second swing lever 62 and The influence on the rotating shaft 60 can be suppressed.

  The operation of the rotary weight filler 8 including the container gripper 18 having the above configuration will be described. The containers 4 conveyed by the supply conveyor 2 are supplied into a rotary weight filler 8 via a supply wheel 6. The weight filler 8 is provided with a container mounting table 12 and a container gripper 18 for holding the container 4 supplied to the container mounting table 12 at equal intervals in the circumferential direction on the outer periphery of the rotating body 10. The container gripper 18 can be used for both large and small containers 4 (4A, 4B), and the movement guide 40 is moved according to the size. For example, when filling the small-diameter container 4B (small-diameter can), the air cylinder 46 is operated to advance the movement guide 40. At this time, the container holding surface 40 b of the movement guide 40 moves forward relative to the container holding surface 38 a of the fixed arm 38. Therefore, when gripping the small-diameter container 4B, the container holding surface 40b of the moving guide 40 and the fixed arms 38, 40 are located closer to the rear end 38b of the container holding surface 38a of the fixed arm 38. It is held by the container 4B with an opening / closing arm 22 that swings.

  A gripper release cam 20 is disposed at a container supply position A where the container is transferred from the supply wheel 6 to the weight filler 8, and when the container gripper 18 approaches the container supply position A, the character-shaped second rocking motion is achieved. A cam follower 66 provided at one end of the moving lever 62 is engaged and pushed into the gripper releasing cam 20. When the cam follower 66 is pushed by the gripper releasing cam 20 and the second swing lever 62 rotates in the clockwise direction in FIG. 6, the drive pin 68 attached to the end opposite to the cam follower 66 is pulled to the tension coil spring 70. Accordingly, it moves downward in FIG. 6 and presses the side surface of the first swing lever 54. When the first swing lever 54 is not in operation, one end 54b (the left end portion in FIG. 6) is pulled by the tension coil spring 56, and rotates integrally with the first swing lever 54 and the rotary shaft 50. The upper opening / closing lever 22 is stopped by hitting the stopper 52 of the movable guide 40. From this state, when the side surface of the first swing lever 54 is pushed by the drive pin 68, it rotates in the counterclockwise direction of FIG. This rotation is transmitted to the upper opening / closing arm 22 via the rotating shaft 50, and the opening / closing arm 22 rotates counterclockwise in FIG. 3B, so that the container gripper 18 is opened.

  The container 4 is inserted from the supply wheel 6 in a state where the opening / closing arm 22 is opened and the space between the fixed arm 38 and the opening / closing arm 22 is open. After that, when the container gripper 18 passes the position of the gripper release cam 20 by the rotation of the rotating body 10, the second swing lever 62 to which the cam follower 66 is attached is pulled by the tension coil spring 70 in the counterclockwise direction. Rotating back to the original position, the drive pin 68 that had pushed the first swing lever 54 is retracted, and the first swing lever 54 is pulled by the tension coil spring 56 and rotated clockwise in FIG. To do. The rotation of the first swing lever 54 is transmitted to the upper opening / closing arm 22 through the rotation of the rotating shaft 50, and rotates the opening / closing arm 22 in the clockwise direction of FIG. When holding the small-diameter container 4B, the movement guide 40 moves forward (the state shown in FIG. 3B), and the second engagement portion 22c on the inner surface of the opening / closing arm is engaged with the stopper 52 of the movement guide 40. Stop at the same time. In this state, the small-diameter container 4 (4B) is held by the tip of the container holding surface 38a of the fixed arm 38, the open / close arm 22, and the container holding surface 40b of the moving guide 40.

  The small-diameter container 4B held by the container gripper 18 is filled with liquid from a filling nozzle (not shown) provided above each container mounting table 12 while being rotated and conveyed by the rotation of the rotating body 10. . When the filled container 4B reaches the container discharge position B, the gripper release cam 24 is provided in the same manner as the container supply position A, and the opening / closing arm 22 is opened by the cam follower 66 being pushed by the release cam 24. To do. When the opening / closing arm 22 is opened, the container 4B is pushed in the tangential direction of the rotating body 10 by the container holding surface 38a of the fixed arm 38 from the rear side in the rotation direction, and the claw of the container take-out mechanism 32 moving on the discharge conveyor 26 It is taken out by 30 and discharged onto the discharge conveyor 26. Then, it is conveyed by this discharge conveyor 26 and sent to the next process.

  When filling the large-diameter container 4A (large-diameter can) with the liquid, the movement guide 40 is moved backward by the operation of the air cylinder 46 (the state shown in FIG. 3A). In the case of a large-diameter container 4A, the container holding surface 40b of the movable arm 40 is retracted rearward from the container holding surface 38a of the fixed arm 38. Hold 4A. In this case as well, the opening / closing operation of the opening / closing arm 22 is performed in the same manner as in the case of the small-diameter container 4B, but the position of the stopper 52 provided inside the movement guide 40 since the movement guide 40 is retracted. However, it has moved rearward from the small diameter container 4B (moved from the position of FIG. 3B to the position of FIG. 3A), and the stepped portion formed on the inner surface of the open / close arm 22 is high. The side (first engagement portion) 22b comes into contact with the stopper 52 and stops at a position where the large-diameter container 4A is held. Since the position at which the open / close arm stops can be changed by switching the position of the movement guide 40 between the forward position and the backward position in this way, the state in which the large-diameter container 4A is held and the state in which the small-diameter container 4B is held. It can be easily switched to both. Therefore, it takes less time to change the mold, and the work efficiency is improved. Moreover, it is not necessary to prepare many attachments, and the cost can be reduced. In addition, the storage space for the attachment is not necessary, and the space can be used effectively. In this embodiment, since the position of the center of the container 4 is different between the large diameter container 4A and the small diameter container 4B, it is necessary to adjust the phase when the container is transferred from the supply wheel 6 to the weight filler 8. . In addition, if the centers of the containers 4A and 4B transported in the weight filler 8 are different, the center of the upper nozzle may not coincide with the center of the container 4A or 4B. There is no problem.

It is a top view which shows the arrangement | positioning of the whole rotary type weight filler provided with the container gripper which concerns on one Example of this invention. (Example 1) It is a longitudinal cross-sectional view of the said container gripper. It is a top view of the said container gripper, (a) A figure shows the case where a large diameter container is hold | maintained, (b) A figure shows the case where a small diameter container is hold | maintained. It is a top view which shows the relationship between the stopper provided in the movement guide, and the 1st engaging part and 2nd engaging part which were provided in the opening-and-closing arm. It is a cross-sectional view showing a container gripper and its opening / closing means. It is a top view explaining operation | movement of an opening / closing means.

Explanation of symbols

4 (4A) Large diameter container 4 (4B) Small diameter container 22 Opening / closing arm 22b First engagement portion 22c Second engagement portion 38 Fixed arm 40 Movement guide 52 Stopper 56 Biasing means (Tension coil spring)

Claims (1)

A fixed arm; an opening / closing arm; an urging means for urging the opening / closing arm in the closing direction; and a stopper for engaging the opening / closing arm urged by the urging means to regulate the closing position of the opening / closing arm. In the container gripper that holds the container by the fixed arm and the open / close arm,
A moving guide is provided that is movable between a forward position that contacts the container held by the fixed arm and a retracted position that does not contact the stopper, and a stopper that regulates the opening and closing arm is provided on the moving guide, and the opening and closing arm A first engaging portion that engages with the stopper of the moving guide in the retracted position, and a second engaging portion that engages with the stopper of the moving guide in the advanced position,
When holding a large-diameter container, the moving guide is moved to the retracted position, and the container is held by the fixed arm and the open / close arm. When holding a small-diameter container, the moving guide is moved to the forward position. A container gripper which is moved and held by a fixed arm, an opening / closing arm and a movement guide.

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