JP2011240962A - Intermittent-turntable-type bagging machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust a bagging machine over a short period of time upon switching of the types of bags in the case in which a plurality of types of bags (for example, normal flat bags, zipper-equipped bags, differently shaped bags) are to be subjected to packaging processes by the bagging machine of an intermittent-turntable-type.SOLUTION: A table 1 is installed in an engaged state in which the table is axially slidable in a predetermined range and rotatable with respect to a spindle 23, which intermittently rotates. A plurality of adjustment shafts 33 (one direct-operated adjustment shaft 33a and a driven adjustment shaft 33b of the remaining part) are disposed around the spindle 23. Each of the adjustment shafts 33 has male screw parts 34 at the same pitch, and they are screwed together with female screw parts 35 formed in the table 1. When the direct-operated adjustment shaft 33a is rotated, all the adjustment shafts 33 are rotated at the same time, the table 1 is slid vertically along the spindle 23 to adjust the height, and the height of a gripper 25 is adjusted at the same time. As a result, height adjustment of supplied bags 3 and height adjustment of package processing members such as a hopper become unnecessary.

Description

  The present invention relates to an improvement of an intermittent rotary table type bagging and packaging machine.

  The intermittent rotating table type bagging and packaging machine is vertically supported by a stand standing upright on the upper surface of the machine base, and a spindle that rotates intermittently by a drive source, and a horizontal surface that is installed on the upper part of the spindle and is intermittently rotated by the spindle. A table that rotates intermittently within the table, and a plurality of grippers that are installed at equal intervals around the table and intermittently move along a circular movement path along with the intermittent rotation of the table. The bag is suspended by gripping with the gripper and is intermittently transferred along with the intermittent rotation of the table. During the transfer process, the opening of the bag mouth, the filling of the package, the sealing of the bag mouth, etc. Are performed sequentially.

  FIG. 3 shows an example of a general intermittent rotation table type bagging and packaging machine. A plurality of grippers (individual grippers) are arranged around a table 1 that rotates intermittently in one direction (the direction of a white arrow) in a horizontal plane. Are shown at regular intervals, and the gripper moves intermittently along a circular movement path as the table 1 rotates intermittently. During the rotation of the gripper, various packages such as supply of the bag 3 to the gripper (bag feeding), opening of the bag mouth of the bag 3, filling of the bag 3 with an object to be packaged, sealing of the bag mouth of the bag 3, etc. Processing steps are performed. The gripper moving path is also a transfer path of the bag 3. In FIG. 3, a support shaft for intermittently rotating the table 1 is not shown.

If it demonstrates concretely with reference to FIG. 3, the stop position I is a bag supply process position, and the conveyor magazine type bag supply apparatus 4 which supplies the bag 3 to a gripper is arrange | positioned. The supplied bag 3 is sandwiched at both side edges near the bag mouth by the pair of gripping portions 2 and 2 of the gripper, and is suspended with the bag mouth facing upward.
The stop position II is a printing process position, and a printing device (only the printer 5 is shown) that prints the date and the like on the bag surface of the bag 3 suspended by the gripper is disposed.

The stop position III is a bag mouth opening process position, and an opening device (a suction cup 6, 6 and a followable opening guide 7, 7) having a pair of suction cups 6, 6 and a pair of followable opening guides 7, 7 that can be brought into contact with and separated from each other 7 is shown).
A stop position IV is a filling process position of an article to be packaged (solid matter), and a filling device (only the hopper 8 is shown) having a hopper 8 that moves up and down is arranged.
The follow-up opening guides 7 and 7 are inserted into the bag mouth opened at the stop position III and immediately opened to maintain the opening state of the bag mouth, and the table 1 is rotated as it is (the gripper and the bag 3 are moved). Then, after moving to the stop position IV, the hopper 8 is inserted into the bag mouth at the stop position IV, then rises and exits from the bag mouth, and immediately returns to the stop position III.

The stop position V is a first gas replacement process position, and a first gas replacement device (only the gas injection nozzle 9 is shown) having a gas injection nozzle 9 that moves up and down is arranged.
The stop position VI is a second gas replacement process position, and a second gas replacement device (only the gas injection nozzle 11 is shown) having a gas injection nozzle 11 that moves up and down is arranged. At the stop position VI, the gap between the grippers (the clamping portions 2 and 2) is widened, and the bag mouth is tensioned.
The stop position VII is a first sealing step position, and a first sealing device having a pair of first hot plates 12 and 12 that are opened and closed (only the first hot plates 12 and 12 are shown) is disposed.
The stop position VIII is a second sealing step position, and a second sealing device having only a pair of second hot plates 13 and 13 (only the second hot plates 13 and 13 are shown) is disposed.

The stop position IX is a seal portion cooling and product bag discharging process position, and a cooling device (only the cooling plates 14 and 14 are shown) having a pair of cooling plates 14 and 14 and a chute 15 are arranged. When the cooling plates 14 and 14 and the clamping portions 2 and 2 are opened, the product bag 3A is unclamped, and the product bag 3A naturally falls on the chute 15 due to its weight, and is guided on the chute 15 and is not shown. Or the like, and is carried out toward a predetermined position by the transport device.
The stop position X is a defective bag discharge process position, and here, a defective bag (for example, an empty bag that has not been packed due to defective opening or the like) is discharged.

In this type of bagging and packaging machine, as shown in Patent Document 1, for example, the table 1 is fixed near the upper end of a spindle that rotates intermittently, and the lower end of the spindle is connected to a drive source of the machine base. Therefore, the height of the table 1 and the gripper cannot be basically changed after the packaging machine is installed.
On the other hand, as illustrated in FIG. 4, the bag to be packaged by this bagging and packaging machine includes a normal bag 3 a, a bag 3 b with a chuck formed with a chuck portion 16, and a deformed bag 3 c having a spout 17. There are various types, and there are cases where two or more types of bags are packaged with a single bagging and packaging machine. In addition, in each bag 3a-3c shown in FIG. 4, the part which gave the oblique line is a scheduled seal | sticker location of a bag mouth. The portions to be sucked by the suction cups 6 and 6 are indicated by phantom lines.

When the bag 3a is packed in a normal bag 3a shown in FIG. 4A, the bag 3a is supplied to the gripper so that the upper edge thereof is slightly higher than the upper ends of the gripping portions 2 and 2 of the gripper. The upper edge height (height from the machine base 18) of the bag 3a at this time is indicated by H1. In the case of such a bag 3a, the height of the suction cup 6 that opens the bag mouth is set near the upper edge of the bag 3a.
When the bag 3b is packed in the zippered bag 3b shown in FIG. 4B, the upper edge height H2 of the bag 3b is higher than the upper edge height H1 of the normal bag 3a (H2> H1). , It is necessary to supply to the clamping parts 2 and 2. This is because the chuck portion 16 is provided at a position below the upper edge of the bag 3b, and the chuck portion 16 needs to be sucked and opened by the suction cups 6 and 6.
Even in the case of a normal bag, if a hole for hanging display (see the hole 19 of the bag 3b with a chuck) is formed in the vicinity of the upper edge of the bag, the suction cups 6 and 6 are inserted through the holes. Since it is necessary to adsorb a slightly lower position, it is necessary to supply the gripper so that the height of the upper edge of the bag is larger than the height H1 in the case of the bag 3a in which the hole is not formed.

  When the bag is packed in the deformed bag 3c shown in FIG. 4 (c), the gripper clamping portions 2 and 2 are formed because the shape is such that one side edge portions (both sides of the spout 17) near the bag mouth are cut out. Therefore, when sandwiching both side edges of the bag, it is necessary to avoid that part. Therefore, the deformed bag 3c needs to be supplied to the gripper (H3> H1 in this example) such that the upper edge height H3 thereof is higher than the upper edge height H1 of the normal bag 3a (H3> H1 in this example). H2). In addition, when bagging and packaging in the deformed bag 3c, the vertical and horizontal positions of the suction cups 6 and 6 are different from the case of packing in the bag 3a and the bag 3b.

Therefore, when changing the bag for bagging and packaging from the normal bag 3a to the zippered bag 3b with the same packaging machine, the height of the upper edge of the bag supplied to the gripper is changed (increased) from H1 to H2. There is a need. Conversely, when changing the bag for bagging and packaging from the zippered bag 3b to the normal bag 3a, it is necessary to change (lower) the height of the upper edge of the bag supplied to the gripper from H2 to H1. If the height is not adjusted in such a manner, the suction position of the suction cups 6 and 6 with respect to the bag 3a or the bag 3b becomes inadequate, and there is a possibility that an opening failure of the bag mouth may occur.
Similarly, when changing from the normal bag 3a or the bag with chuck 3b to the deformed bag 3c, or from the deformed bag 3c to the normal bag 3a or bag 3b with chuck, the upper edge height of the bag supplied to the gripper is changed. There is a need.

In order to change the height of the upper edge of the bag supplied to the gripper, it is necessary to change a part of the setting of the bag feeding device. For example, if the bag supply device is disclosed in Patent Document 2, the position of the stopper at the end of the conveyor is changed, and if the bag supply device is disclosed in Patent Document 3, the stroke of the reciprocating rotation of the transfer arm is changed ( By changing the forward movement height), the upper edge height of the bag supplied to the gripper can be changed.
Also, if the height of the upper edge of the bag to be supplied is changed, in many cases, a suction cup that opens the bag mouth, an opening guide, a solid material filling hopper, a liquid filling nozzle, a gas blowing nozzle, and heat for sealing the bag mouth It is necessary to change the setting of the height position of the packaging processing member such as a plate or a cooling plate.

Japanese Utility Model Publication No. 5-28169 Utility Model Registration No. 2603966 JP 2002-173112 A

In this way, when packaging with respect to multiple types of bags, such as a normal bag, a bag with a chuck, a bag with a hanging display hole, a deformed bag, etc., with one intermittent rotating table type bagging and packaging machine, Usually these bags need to be fed to the gripper at different heights. For this reason, when switching the type of bag to be packed, it is usually necessary to change the setting of the height position of each packaging processing member in addition to the bag feeder, but the adjustment work is complicated and time-consuming. As a result, productivity was greatly reduced.
The present invention has been made in view of the conventional problems as described above. In the case where a plurality of types of bags as described above are packaged by one intermittent rotary table type bag filling and packaging machine, It is an object of the present invention to make it possible to easily and quickly adjust the bag-packing and packaging machine when switching the type.

  The present invention relates to a spindle that is vertically supported by a stand that is erected on the upper surface of the machine base and intermittently rotates by a drive source, and a table that is installed on the upper part of the spindle and intermittently rotates in a horizontal plane along with the intermittent rotation of the spindle. And a plurality of grippers that are installed at equal intervals around the table and intermittently move along a circular movement path along with the intermittent rotation of the table, and sandwich both side edges of the supplied bag with the grippers. An intermittent rotating table that suspends the bag and intermittently transfers the table along with the intermittent rotation of the table, and sequentially performs the packaging processing steps such as opening the bag mouth, filling the package, and sealing the bag mouth during the transfer process. In the type bag-packing and packaging machine, the table is slidable in a predetermined range in the axial direction with respect to the support shaft and is engaged with the rotation direction. Further, the table is slid in the axial direction of the support shaft. The Characterized in that it comprises a positioning adjusting mechanism for adjusting the vertical position of Le and the gripper (claim 1).

As desirable forms of the intermittent rotary table type bag filling and packaging machine, the following points can be mentioned.
(1) The positioning adjustment mechanism includes a plurality of adjustment shafts arranged vertically at predetermined positions around the support shaft, and is fixed to the support shaft and rotatably supports the adjustment shaft. An adjustment shaft support member and a rotation drive mechanism for simultaneously rotating the plurality of adjustment shafts, the plurality of adjustment shafts having male screw portions of the same pitch, and a plurality of female screw portions formed on the table; The external thread portion of the adjustment shaft is screwed into the internal thread portion of the table (Claim 2).
(2) The adjustment shaft is composed of one linear motion adjustment shaft and the remaining driven adjustment shaft, and the rotational drive mechanism is a handle or servo motor for rotating the linear motion adjustment shaft, and the linear motion adjustment shaft and driven adjustment. A transmission mechanism disposed between the shafts is provided, and the driven adjustment shaft is simultaneously driven and rotated through the transmission mechanism as the linear motion adjusting shaft rotates.
(3) The adjustment shaft support member is disposed above and below the table, and supports an upper end portion and a lower end portion of the adjustment shaft (claim 4).
(4) The gripper has a gripping portion that sandwiches both side edges of the bag at the tip ends of a pair of gripper arms, and a driving source for opening and closing the gripping portion is disposed in each gripper arm. It is an air cylinder (Claim 5).

  According to the intermittent rotation table type bagging and packaging machine according to the present invention, when packaging is performed for a plurality of types of bags with one intermittent rotation table type bagging and packaging machine, the bagging is performed when the type of the bag is switched. The packaging machine can be easily adjusted in a short time, and productivity is improved.

It is principal part sectional drawing of the intermittent rotation table type bagging and packaging machine which concerns on this invention. It is a figure which shows the positional relationship of the clamping part of the gripper in the bagging and packaging machine, and the supplied bag. It is a perspective view of a general intermittent rotation table type bagging and packaging machine. It is a figure which shows the positional relationship of the clamping part of the gripper in the conventional intermittent rotation table type bagging and packaging machine, and the supplied bag.

Next, the intermittent rotary table type bagging and packaging machine according to the present invention will be specifically described with reference to FIGS.
The basic structure of the main part of this bagging and packaging machine is the same as that of the bagging and packaging machine described in Patent Document 1. A cylindrical stand 21 is erected on the machine base 18, and a support shaft 23 is rotatably supported via a hollow shaft 22 inside the stand 21. Specifically, the hollow shaft 22 is rotatably supported inside the stand 21, and the support shaft 23 is rotatably supported inside the hollow shaft 22. A drive gear 20 is fixed to the lower end of the support shaft 23, and the drive gear 20 is connected to a drive source (not shown) installed inside the machine base 18 and rotates intermittently, whereby the support shaft 23 rotates intermittently.

  Similar to the bag-packing and packaging machine described in Patent Document 1, an all-around cam 24 is slidable in the up-and-down direction and engaged in the rotating direction at the upper end of the hollow shaft 22. The all-around cam 24 is a substantially disk-shaped member, and the upper surface of the surrounding cylindrical portion is a cam surface, and can be moved up and down by a lifting device (not shown) (see Patent Document 1) and positioned in the height (vertical direction). is there. A lever 27 is fixed to the lower end of the hollow shaft 22, and the tip of a rod 28 that is advanced and retracted by a cam (not shown) is connected. As the rod 28 advances and retreats, the hollow shaft 22 (and the entire circumferential cam 24) rotates by a predetermined angle or returns.

Near the upper end of the support shaft 23, the table 1 is installed so as to be slidable within a predetermined range in the axial direction with respect to the support shaft 23 and engaged in the rotational direction. This installation form is different from the bagging and packaging machine described in Patent Document 1 (in the bagging and packaging machine described in Patent Document 1, it is fixed to the support shaft). When the support shaft 23 rotates intermittently, the table 1 rotates intermittently. This is the same as the bagging and packaging machine described in Patent Document 1.
A star-shaped cam 29 is installed on the table 1 so as to be rotatable and engaged in the vertical direction. The star cam 29 can be rotated with respect to the table 1 and positioned in the rotational direction by an adjusting device (not shown) (see Patent Document 1). The structure and function of the star-shaped cam 29 are the same as those of the bag filling and packaging machine described in Patent Document 1.

  Adjustment shaft support members 31 and 32 are fixed to the vertical position of the support shaft 23 with the table 1 and the star cam 29 interposed therebetween. A plurality of adjustment shafts 33 (one linear adjustment shaft 33a and one or more driven adjustment shafts 33b) are arranged at equiangular intervals around the support shaft 23 (on a circumference around the support shaft 23). Each adjustment shaft 33 passes through a long hole formed in the star cam 29, and both upper and lower ends thereof are rotatably supported by the adjustment shaft support members 31 and 32. Each adjustment shaft 33 is formed with a male screw portion 34 having the same pitch and is screwed into a female screw portion 35 formed on the table 1.

  At a position directly below the adjustment shaft support member 31, the transmission gear 36 is rotatably supported by the support shaft 23, and an adjustment gear 37 fixed to each adjustment shaft meshes with the periphery of the transmission gear 36. An extension shaft portion 38 is integrally formed at the upper end portion of the linear motion adjusting shaft 33a, and a handle 39 is fixed to the upper end thereof. A compression spring 42 is interposed between the engagement portion 41 formed on the extension shaft portion 38 and the adjustment shaft support member 31 to urge the linear motion adjustment shaft 33a upward. The compression spring 42 has a function of preventing looseness of the threaded portion of the linear motion adjusting shaft 33a and that the threaded portion is naturally loosened due to machine vibration or the like. The handle 39 is for manually rotating the linear motion adjusting shaft 33a. However, for example, a servo motor may be connected to the linear motion adjusting shaft 33a to be automatically rotated.

When the handle 39 is rotated, the linear motion adjusting shaft 33a is rotated, and at the same time, all the driven adjusting shafts 33b are rotated via the transmission gear 36 and the adjusting gear 37, whereby the table 1 remains on the support shaft 23 while maintaining the horizontal state. The table 1 (and the gripper 25) can be positioned at an appropriate height.
The adjustment shaft support members 31 and 32, the adjustment shaft 33 (the linear movement adjustment shaft 33a and the driven adjustment shaft 33b), the female screw portion 35 formed on the table 1, the transmission gear 36, the adjustment gear 37, the handle 39, and the like are included in the present invention. The transmission gear 36, the adjustment gear 37, the handle 39, and the like correspond to the rotation drive mechanism according to the present invention, and the transmission gear 36 and the adjustment gear 37 correspond to the transmission mechanism according to the present invention. As this positioning adjustment mechanism, a mechanism such as an elevating device (see Patent Document 1) for the all-around cam 24 may be employed.

Around the table 1, a plurality of grippers 25 are installed at the same angle (equal interval) as the angle of one intermittent rotation of the table 1. The gripper 25 is a pair of left and right rocking levers 44 and 44 (see FIG. 1) that are rotatably attached to a support shaft 43 fixed to the table 1, as described in Japanese Patent Application Laid-Open No. 2009-298418. (Only one side is shown), a cylindrical gripper arm 45 fixed to the tip of each swing lever 44, and a clamping part 2 attached to the tip of each gripper arm 45. In each gripper arm 45, an air cylinder is disposed as a drive source for opening and closing the clamping unit 2.
The pair of left and right swing levers 44, 44 (gripper arms 45, 45 and sandwiching portions 2, 2) are urged inward by a tension spring 46.

In FIG. 1, 47 is an L-shaped lever, and 48 is a roller that rolls on the cam surface of the all-around cam 24. These members are part of a mechanism for opening and closing the swing levers 44 and 44 (gripper arms 45 and 45), and the mechanism has the same structure and function as those described in Patent Document 1, and each gripper 25 is installed on the table 1. When the table 1 and the all-around cam 24 rotate relative to each other, the roller 48 rolls on the cam surface of the all-around cam 24. 47 swings, and the pair of left and right swing levers 44, 44 (gripper arms 45, 45) open and close with each other in the horizontal plane, and the facing distance between the pair of left and right sandwiching portions 2, 2 changes.
When the table 1 rotates intermittently, the all-around cam 24 also follows and rotates forward at the same angle (there is no relative rotation between them). When the table 1 stops, the all-around cam 24 rotates backward. Return to the original position (relative rotation of both occurs). This is also the same as the bagging and packaging machine described in Patent Document 1.

  When the bag width of the bag 3 to be packed is changed, the entire cam 24 is moved up and down by the lifting device and the height (vertical direction) is positioned so that the gripper arms 45 and 45 of the grippers 25 The facing distance (the facing distance between the clamping parts 2 and 2) can be adjusted. The maximum interval of the facing intervals is set by the height of the all-around cam 24 (relative height with respect to the table 1). Further, the star cam 29 is rotated with respect to the table 1 by the adjusting device and positioned in the rotational direction so that the facing distance between the gripper arms 45 and 45 of each gripper 25 (the facing distance between the sandwiching portions 2 and 2). Can be adjusted. Depending on the rotational direction position of the star-shaped cam 29 with respect to the table 1, the minimum distance of the facing distance is set. The above points are also the same as the bag filling and packaging machine described in Patent Document 1.

  As described above, the intermittent rotation table type bagging and packaging machine of the present invention is different from the conventional intermittent rotation table type bagging and packaging machine (refer to Patent Document 1, Japanese Patent Application Laid-Open No. 2009-298418). The positioning adjustment mechanism is installed so as to be movable up and down with respect to the support shaft 23 and adjusts the vertical position (height) of the table 1 by raising and lowering it. By adjusting the height of the table 1, the heights of all the grippers 25 (the heights of the sandwiching portions 2 and 2) are adjusted simultaneously.

In this bagging and packaging machine, the following adjustments are made when switching the type of bag to be packed and packed.
First, when performing bagging and packaging on a normal bag 3a, as shown in FIG. 2 (a), the bag 3a is supplied so that its upper edge is slightly higher than the upper ends of the sandwiching portions 2 and 2 of the gripper 25, The height of the suction cup 6 that opens the bag mouth is set near the upper edge of the bag 3a. The positional relationship between the upper edge of the bag 3a and the sandwiching portions 2 and 2 and the relationship between the upper edge of the bag 3a and the height position of the suction cup 6 are the same as in the prior art shown in FIG.
In FIG. 2, the hatched portion is a scheduled sealing portion of the bag mouth. In addition, the locations to be sucked by the suction cups 6 and 6 are indicated by phantom lines.

  Next, when changing the bag for bagging and packaging to the zippered bag 3b, as shown in FIG. 2 (b), the height of the gripping portions 2 and 2 of the gripper 25 and the suction cups 6 and 6 of the opening device Adjust the position. Specifically, the height of the sandwiching portions 2 and 2 of the gripper 25 is lowered, and the suction position of the suction cups 6 and 6 of the opening device is lowered to the position of the chuck portion 16. In order to lower the height of the holding parts 2, 2, the handle 39 may be operated to lower the height of the table 1. Further, as the height of the table 1 is adjusted, the height of the all-around cam 24 is also adjusted by operating the lifting device (in this case, since the bag width is the same, the lowering width of the table 1 is reduced). As much as you can). The positional relationship between the upper edge of the bag 3b and the sandwiching portions 2 and 2 and the relationship between the upper edge of the bag 3b and the height position of the suction cup 6 are the same as in the prior art shown in FIG.

  The same applies to the case where the bag for bagging and packaging is changed from the normal bag 3a to the deformed bag 3c. As shown in FIG.2 (c), the height of the clamping parts 2 and 2 of the gripper 25 and the suction position of the suction cups 6 and 6 of an opening device are adjusted. Specifically, the height of the gripping portions 2 and 2 of the gripper 25 is lowered, the suction position of the suction cups 6 and 6 of the opening device is slightly lowered, and the horizontal position is also shifted to the center of the opening of the bag mouth. In some cases, the horizontal position of the opening guides 7 and 7 of the bag mouth is also shifted. In order to lower the height of the holding parts 2, 2, the handle 39 may be operated to lower the height of the table 1. Further, as the height of the table 1 is adjusted, the height of the all-around cam 24 is also adjusted by operating the lifting device (in this case, since the bag width is the same, the lowering width of the table 1 is reduced). As much as you can). The positional relationship between the upper edge of the bag 3c and the sandwiching portions 2 and 2 and the relationship between the upper edge of the bag 3c and the height position of the suction cup 6 are the same as in the prior art shown in FIG.

Similarly, when the bag to be packed is changed from the zippered bag 3b or the deformed bag 3c to the normal bag 3a, the height of the table 1, the height of the circumferential cam 24, and the suction cups 6 and 6 of the opening device What is necessary is just to adjust the adsorption position.
In the intermittent rotating table type bagging and packaging machine, the height of the table 1, the height of the all-around cam 24, and the suction cups 6 and 6 of the opening device are always adsorbed as the bags for bagging and packaging are switched. Not all of the positions need to be adjusted. Depending on the form of the bag before and after switching, only the adjustment of the height of the table 1 and the height of the all-around cam 24 may be required.

  In the intermittent rotary table type bag filling and packaging machine, since the bag feeding device is not adjusted in the switching of the bag for carrying out the bag filling and packaging (rather, no adjustment is required), as shown in FIGS. The height of the upper edge of the bags 3a-3c has not changed. Moreover, since the height of the upper edge of the bags 3a to 3c does not change, packaging such as a bag mouth opening guide, a solid matter filling hopper, a liquid filling nozzle, a gas blowing nozzle, a hot plate for bag mouth sealing, a cooling plate, etc. It is not necessary to change the setting of the height position of the processing member. Therefore, the adjustment of the bag filling and packaging machine accompanying the switching of the bags can be easily performed in a short time compared to the conventional one.

In the intermittent rotary table type bagging and packaging machine, in accordance with the disclosure of Japanese Patent Application Laid-Open No. 2009-298418, the driving source for opening and closing the clamping portions 2 and 2 of the gripper 25 is an air cylinder, and this is used as the gripper arm 45. , 45. For this reason, it is not necessary to separately provide an opening / closing drive mechanism for the clamping parts 2 and 2 on the machine base 18, and it is not necessary to adjust the gripper 25 itself at the time of switching the bag for bagging and packaging.
On the other hand, as described in Japanese Patent Application Laid-Open No. 6-156440, opening and closing of the gripping portions 2 and 2 of the gripper 25 are performed at appropriate positions on the machine base (for example, empty bag supply process position, discharged bag discharge process position). It can also be performed by an opening / closing drive mechanism installed in the above.

  The gripper described in JP-A-6-156440 includes a pair of left and right swing levers attached to a table that rotates intermittently, a gripper arm whose base is fixed to each swing lever, and a tip portion of each gripper arm. The holding part is composed of a fixed-side holding piece with the holding surface facing in the radial direction and a movable-side holding piece rotatably installed at the tip of the gripper arm. (The above points are the same as the above-mentioned JP 2009-298418 A). The gripper arm is provided with a connecting mechanism consisting of passive members, rods, link mechanisms, etc. that transmit the power of the open / close drive mechanism to the movable side clamping piece, and the movable side clamping piece is always attached in the closing direction. A compression spring or the like is installed. A cylindrical member (roller) is attached to the passive member, and when the protrusion of the opening / closing drive mechanism moves forward and presses the cylindrical member in the radial direction of the table, the movable side holding piece opens, and the protrusion When retracted, the movable side clamping piece is closed by the biasing force of the compression spring.

  When this kind of gripper is applied to the intermittent rotation table type bagging and packaging machine, the height of the cylindrical member also changes when the height of the table is adjusted. Therefore, in this case, the height position of the protrusion of the opening / closing drive mechanism can be adjusted, or the vertical length of the cylindrical member is formed sufficiently long, and the height of the table is adjusted with the adjustment of the height of the table. Even if the height position of the cylindrical member changes, it is necessary to be able to press the cylindrical member with the protrusion. In the former case, the number of adjustment points is increased by one when switching the bag for bagging and packaging, and in the latter case, particularly when the height of the table is raised, the protrusion presses the lower part of the relatively long cylindrical member. Therefore, it is necessary to increase the rigidity of the cylindrical member. In any case, it is more desirable to apply a gripper of the type described in JP 2009-298418 A to the intermittent rotary table type bag filling and packaging machine.

DESCRIPTION OF SYMBOLS 1 Intermittent rotary table 2 Gripper clamping part 21 Stand 22 Hollow shaft 23 Support shaft 24 All-around cam 25 Gripper 29 Star-shaped cams 31, 32 Adjustment shaft support member 33 Adjustment shaft (linear adjustment shaft 33a, driven adjustment shaft 33b)
34 Male thread part 35 Female thread part 36 Transmission gear 37 Adjustment gear 39 Handle

Claims (5)

A spindle that is vertically supported by a stand standing on the upper surface of the machine base and intermittently rotates by a drive source, a table that is installed on the upper part of the spindle and intermittently rotates in a horizontal plane along with the intermittent rotation of the spindle, and the table A plurality of grippers that are installed at equal intervals around the table and intermittently move along a circular movement path according to intermittent rotation of the table, and sandwich the side edges of the supplied bag with the gripper to suspend the bag In addition, the table is intermittently transferred along with the intermittent rotation of the table, and in the process of the transfer, the bag opening and closing of the bag mouth, the filling of the article to be packed, the sealing of the bag mouth and the like are sequentially performed. In the machine, the table is slidable in a predetermined range in the axial direction with respect to the spindle and is engaged in the rotational direction, and the table is further slid in the axial direction of the spindle and the table and Intermittently rotating table type bag packaging machine characterized in that it comprises a positioning adjusting mechanism for adjusting the vertical position of the ripper. The positioning adjustment mechanism includes a plurality of adjustment shafts arranged vertically at predetermined positions around the support shaft, and an adjustment shaft support that is fixed to the support shaft and rotatably supports the adjustment shaft. A rotation drive mechanism for rotating the member and the plurality of adjustment shafts at the same time, the plurality of adjustment shafts having male screw portions of the same pitch, and a plurality of female screw portions formed on the table; The intermittently rotating table type bagging and packaging machine according to claim 1, wherein the male screw portion is screwed into the female screw portion of the table. The adjustment shaft includes one linear motion adjustment shaft and the remaining driven adjustment shaft, and the rotation drive mechanism is provided between a handle or a servo motor that rotates the linear motion adjustment shaft, and the linear motion adjustment shaft and the driven adjustment shaft. The intermittent rotation table type bag according to claim 2, wherein the driven adjustment shaft is simultaneously driven and rotated through the transmission mechanism as the linear adjustment shaft rotates. Stuffing packaging machine. 4. The intermittent rotating table type bag according to claim 2, wherein the adjustment shaft support member is disposed above and below the table and supports an upper end portion and a lower end portion of the adjustment shaft. Stuffing packaging machine. The gripper is an air cylinder having a gripping portion for sandwiching both side edges of the bag at the tip ends of a pair of gripper arms, and a drive source for opening and closing the gripping portion is disposed in each gripper arm. The intermittent rotation table type bagging and packaging machine according to any one of claims 1 to 4.

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