JP3898177B2 - Grip pair opening adjustment device for packaging machines - Google Patents

Description

  The present invention relates to an opening degree adjusting device for adjusting the opening degree of a grip pair for holding a packaging bag in a rotary type packaging machine in accordance with the size of the bag width.

  For example, as disclosed in Japanese Utility Model Publication No. 63-30652, an opening adjusting device for a grip pair that sandwiches a conventional packaging bag is operated by rotating a handle provided on a turning disc. By rotating the adjustment disk supported rotatably on the plate by a small angle, the opening degree of the grip pair is increased by the interlocking action of the link mechanism and the sector gear provided between the adjustment disk and the grip pair. It is structured to adjust according to the size of the bag width of the packaging bag.

  In addition, in the “Grip pair opening adjusting device in a packaging machine” described in Japanese Patent Application Laid-Open No. 2001-146221, when the feed screw is driven to rotate by the motor device and the lifting shaft moves upward, the adjustment lever swings. The adjusting disc is rotated clockwise by a small angle, and the second lever piece is moved inward by the third link connected to the adjusting disc, whereby the first lever piece is rotated to hold the grip pair. On the other hand, the interval between the clamping portions can be reduced by rotating the feed screw in the opposite direction.

An opening adjusting device for a grip pair corresponding to a gusset bag is disclosed in “Bag size adjusting device for automatic packaging machine” of Japanese Utility Model Publication No. 4-47048. When the operating shaft provided in the shape of a rotating disk is rotated, the adjusting device moves the distance adjusting pieces respectively screwed to the portions where the threading direction is reversed by rotating the feed screw in the approaching or separating direction. Therefore, the interval between the biting arms is adjusted according to the bag size.
No. 63-30652 JP 2001-146111 A No. 4-47048

  An object of the present invention is to provide an opening adjusting device for a grip pair having a new structure suitable for either manual operation or automation by motor drive control.

In order to achieve the above-mentioned object, the invention described in claim 1 includes a rotating body fixed to an intermittent rotating shaft provided freely rotatable on a stand, and a large number of support arms projecting radially from the rotating body. A pair of holders each equipped with a gripping part constituting a grip pair are provided so that they can be rotated horizontally within a small angle range, and the free ends of the levers provided in each holder are connected by links, and intermittently rotated concentrically with the rotating body. An adjustment disk provided rotatably on the shaft side and one of the levers are provided so as to be capable of interlocking via a link mechanism, and the adjustment disk is rotated clockwise or counterclockwise by a driving means. An opening adjusting device for a grip pair in a packaging machine capable of adjusting an interval of a holding portion for holding a side edge of a bag according to the size of a bag width,
As for the driving means, a female screw formed on the inner periphery of a large-diameter gear is screwed onto a male screw formed on the outer periphery of a ring member fixed to the stand concentrically with the intermittent rotation shaft, A small-diameter gear meshed with the radial gear is rotated by an adjusting rod provided on the machine base side so that the large-diameter gear can be moved up and down, and a moving shaft provided on the rotating body is slidable in the vertical direction. A lower end portion is placed on and supported by the upper surface of the large-diameter gear, and the moving shaft and the adjustment disc are provided so as to be interlocked via a lever mechanism, and a handle or an output shaft of a servo motor device is provided at one end portion of the adjustment rod. the installed to connect, its handle the large diameter gear and the moving shaft is moved up and down actuated by the rotation operation of the adjusting rod by a manual operation or servo motor apparatus according to a horizontal and vertical movement of the movement axis by means of a lever mechanism By rotating the adjusting disc by turning the work, characterized in that the spacing of the clamping portion is configured to be able to adjust according to the size of the bag width.

  In order to achieve the same object, the invention described in claim 2 is the grip pair opening degree adjusting device in the packaging machine according to claim 1, wherein a roller is rotatably attached to a lower end portion of the moving shaft, A roller is provided so as to roll on the upper surface of the large-diameter gear.

(Invention of Claim 1)
The opening adjustment device for the grip pair in this packaging machine has a structure suitable for either manual operation or automation, and safely adjusts the opening degree of the holding portion for holding the packaging bag even during operation of the packaging machine. be able to. In detail, in the case of manual operation, since the adjustment rod is provided on the machine base side, the operability is good and the movable mechanism part of the packaging machine is at a safe place away from the center where it converges. The opening degree can be adjusted. On the other hand, in the case of automation, it is provided to connect the output shaft of the servo motor device to the adjustment rod, and the rotation amount of the output shaft of the servo motor device corresponding to the size of the bag width is set in advance to control the packaging machine. Easy opening by adjusting the rotation amount of the adjusting rod by feedback control of the rotation amount of the servo motor device based on the control value of the storage portion by inputting the sizing value of the bag width and storing it in the storage unit of the device Adjustments can be made.

(Invention of Claim 2)
The opening adjustment device for the grip pair in this packaging machine can prevent the moving shaft from being worn by the roller that is in contact with the upper surface of the large-diameter gear, so that the moving shaft can be prevented from being worn. It can be performed stably.

  The best mode of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal side view showing a right half from the rotation center of an intermittent rotation shaft in a packaging machine to which an opening adjusting device for a grip pair of the present invention is applied, FIG. 2 is a plan view of FIG. 1, and FIG. 4 is a side view showing a transmission mechanism up to a small-diameter gear, FIG. 4 is an explanatory view of a mechanism portion for interlocking a moving shaft and an adjusting disk, and FIG. 5 is a plan view of a grip pair showing a state immediately before holding a gusset bag. .

  In FIG. 1, a vertical intermittent rotary shaft 3 is freely rotatable on a stand 2 erected on a machine base 1 of a rotary type packaging machine to which an opening adjusting device for a grip pair in the packaging machine of the present invention is applied. I support it. The lower part of the intermittent rotation shaft 3 is fixed to an output shaft (not shown) of an index device installed below the machine base. Reference numeral 6 denotes a disk-shaped rotating body attached to the upper flange 3 a of the intermittent rotating shaft 3. An adjusting disk 8 is disposed concentrically between the lower surface of the rotating body 6 and the step 4 formed on the outer peripheral edge of the upper flange 3 a, and the inner edge 8 a of the adjusting disk 8 is formed on the step 4. The adjusting disk 8 is provided so as to be rotatable with respect to the intermittent rotating shaft 3 side.

  A ring member 11 is fixed on the upper surface of the upper flange 2 a of the stand 2 concentrically with the intermittent rotation shaft 3. A male screw 11 a is formed on the outer periphery of the ring member 11. A female screw 12a formed on the inner periphery of the large-diameter gear 12 is screwed into the male screw 11a. In addition, the mounting plate 14 fixed to the lower surface of the upper flange 2a is provided with a shaft portion 16 of a small-diameter gear 15 that meshes with the large-diameter gear 12 so as to freely rotate. Reference numeral 17 denotes a cam plate having an outer peripheral surface 17 a formed in a substantially circular shape. The cam plate 17 is fixed to the mounting plate 14.

  In FIG. 3, the bracket 20 attached to the lower flange 2b of the stand 2 is provided with a vertical axis 22 and a horizontal axis 24 to which miter gears 21 and 23 are fixed, respectively, so as to freely rotate. An upper end portion 22a of the vertical axis 22 is loosely fitted to the intermediate flange 2c of the stand 2, and an intermediate shaft 28 is connected to the upper end portion 22a via a universal joint 27. The intermediate shaft 28 and the shaft of the small diameter gear 15 are connected. The part 16 is connected via a universal joint 29. The bracket 30 attached on the outer edge of the machine base 1 is provided with an adjusting rod 31 provided with a handle 32 so as to freely rotate. The adjustment rod 31 has an inner shaft 31 connected to an inner shaft 31 via a universal joint 33, and the intermediate shaft 34 and the horizontal shaft 24 are connected via a universal joint 35.

  Thus, by rotating the adjusting rod 31 with the handle 32, the rotational motion is transmitted to the small diameter gear 15, and the large diameter gear 12 is provided so as to be movable up and down.

  As shown in FIG. 4, a moving shaft 39 is inserted into a bearing member 38 provided near the center of the rotating body 6 so as to be slidable in the vertical direction. A roller 41 is rotatably attached to the lower end portion of the moving shaft 39 by a horizontal shaft 40, and the roller 41 is mounted on the upper surface of the large-diameter gear 12 so as to be able to roll. The upper end of the moving shaft 39 is connected to one lever piece 43 a of an upper and lower lever 43 that is freely swingable by a bracket 42 attached to the upper surface of the rotating body 6. The other lever piece 43b of the upper and lower lever 43 is connected to the rod 49 via one lever piece 46a and a rod 49 of an adjustment lever 46 that is freely swingable in the horizontal direction by a pin 45 fixed to the upper surface of the rotating body 6. It is connected.

  A long groove 47 is formed in the other lever piece 46 b of the adjusting lever 46 in the longitudinal direction, and the pin 9 fixed to the adjusting disk 8 is engaged with the long groove 47. More specifically, a bush 10 is fitted to the pin 9, and the bush 10 is loosely fitted in the long groove 47. The upper and lower levers 43, the rod 49, and the adjustment lever 46 constitute a lever mechanism that interlocks the moving shaft 39 and the adjustment disc 8.

  The rotating body 6 has a large number, that is, the same number as the number of stations. In this example, ten stations are assumed. Therefore, support arms 51 are projected in the radial direction at equal angular intervals of 36 °. . A pair of vertically long U-shaped support frames 52 and 52 are fixed to each support arm 51 so as to face each other, and a pair of grips are provided by support pins 53 and 53 that are vertically fixed to the vertical positions of the support frames 52 and 52. Holders 55 and 55 each having a clamping portion constituting 70 are provided so as to be horizontally rotatable within a small angle range. The free ends of the levers 56, 57 provided on the inner side surfaces of the holders 55, 55 are connected by a link 58. Further, these holders 55 and 55 are provided so as to be always urged inward by a pulling spring 59.

  As shown in FIG. 2, ten longitudinal axes 60 are provided at the equiangular intervals on the outer peripheral edge 6 a of the rotating body 6. On each longitudinal axis 60, a saddle-shaped lever 61 and an arm 64 are arranged in the vertical direction, and these are rotatably supported. One lever piece 61a of the lever 61 and the lever 56 are connected by a rod 62, and one end of a first link 63 is connected to the other lever piece 61b. A roller 65 is rotatably supported at the free end portion of the arm 64, and the roller 65 is provided in pressure contact with the outer peripheral surface 17a of the cam plate 17 by the elasticity of a spring (not shown).

  A free end of the first link 63, a free end of the second link 66 connected at one end to the arm 64, and a third link connected at one end to the pin 9 and the pin 9 'fixed to the adjusting disk 8 The free ends 67 are connected by a connecting shaft 68. As a result, the pin 9 of the adjusting disk 8 and the one lever 56 can be linked via a link mechanism including the hook-shaped lever 61, the first link 63, the second link 66, the third link 67, and the rod 62. Is provided.

The grip pair 70 has a structure according to the “Gazette bag opening / closing device” described in Japanese Utility Model Publication No. 7-18571.
That is, as shown in FIG. 1, the holders 55, 55 have a first slide rod 71 having a rack 71a formed on the inner surface and a second slide rod 72 having a rack 72a formed on the inner surface arranged in parallel. A pinion 73 is engaged with both racks 71a and 72a, and a first slide rod 71 and a second slide rod 72 are provided so as to be relatively movable in the front-rear direction by the rotation of the pinion 73.

As shown in FIG. 5, a first fixed support member 75 having a fixed clamping portion 76 at the tip is attached to the first slide rod 71. The first fixed support member 75 is attached with a first movable support member 78 having a movable clamping portion 79 at the tip via parallel links 77, 77, and a guide having one end fixed to the first movable support member 78. The other end of the bar 80 is loosely fitted to the base portion of the first fixed support member 75, and the movable holding portion 79 is provided to be pressed toward the fixed holding portion 76 by a coil spring 81 attached to the guide bar 80. By pressing the roller member 82 attached to the rear end of the first movable support member 78 by a pressing means (not shown) or releasing the pressing operation, the movable holding portion 79 can be brought into and out of contact with the fixed holding portion 76. constituting the first clamping portion g ₁ was.

The second slide rod 72 is detachably provided with a second fixed support member 85 having a fixed clamping portion 86 at its tip by a bracket 85a. The second fixed support member 85 is disposed in parallel to the outside of the first fixed support member 75, and the fixed support member 85 is provided with a movable holding portion 89 at the tip thereof via parallel links 87 and 87. The second movable support member 88 is attached. The other end of the guide bar 90 whose one end is fixed to the second fixed support member 85 is loosely fitted to the base of the second movable support member 88, and the movable holding portion 89 is fixed by the coil spring 91 attached to the guide bar 90. It is provided so as to repress toward 86. Then, by pressing the roller member 92 attached to the rear end of the second movable support member 88 by a pressing means (not shown) or releasing the pressing operation, the movable holding portion 89 can be brought into and out of contact with the fixed holding portion 86. constituting the second pinching portion g ₂ which was.

The corresponding distance L of the first clamping portion g ₁ and the left and right second holding portion g ₂ of the right and left, expand and contract adjustable to fit the width of the gusset bag a or flat bag by the rotation operation of the holder 55, 55 Is provided.

Thus, in the case of the gusset bag a, the grip pair 70 is, as shown in FIG. 5, the front and rear, left and right (four locations) vertical edges b and c by the first clamping portion g ₁ and the second clamping portion g _2. To grip the packaging bag a. In the case of flat bag, the first clamping portion g ₁ or is configured to掴着both sides of the vertical edge by the second pinching portion g _2.

  A pin 95 passing through a long groove formed in the holder 55 is attached to the lower surface of each first slide rod 71. Reference numeral 96 denotes a bell crank which is freely swingable by a bracket 97 attached to the lower end of the longitudinal axis 60, and one end of a frame member 98 is connected to a vertical arm portion 96 a of the bell crank 96. The lower end portion of the pin 95 is fixed to the other end of the frame member 98, and the other end of the link 99 connected to the intermediate position is connected to the bracket 97. The roller 101 attached to the lateral arm portion 96 b of the bell crank 96 is provided so as to be placed on the upper surface of the annular cam 102 fixed to the intermediate flange 2 c of the stand 2.

Thus, the first crank rod 71 and the second slide 71 are moved in parallel by moving the frame member 98 back and forth by swinging the bell crank 96 with the ring cam 102 or the partial cam piece in a timely manner by the rotating operation of the rotating body 6. a slide rod 72 relatively approaches or is separated configured to adjust to suit the spacing of the first clamping portion of the grip-to 70 g ₁ and the second clamping portion g ₂ to the dimensions of the folds of the gusset bag a ing.

In this embodiment, the grip pair is structured to be compatible with two types of gusset bag a and flat bag, but this can also be applied to a grip pair dedicated to flat bags.
The opening degree adjusting device for the grip pair in the packaging machine is configured as described above.

Next, the operation of the opening adjustment device for the grip pair in the packaging machine configured as described above will be described.
When the adjustment rod 31 is rotated by the handle 32, the rotational movement is transmitted to the small diameter gear 15, and the large diameter gear 12 and the moving shaft 39 move upward. As the moving shaft 39 moves upward, the up / down lever 43 swings and pushes the rod 49, so that the adjustment lever 46 rotates to rotate the adjustment disc 8 counterclockwise by a small angle. The third link 67 and the first link 63 follow the rotational movement of the adjusting disk 8 to move the hook lever 61 inward and push the rod 62, so that the holders 55 and 55 are supported by the support pins 53. , 53, the gap L between the gripping pairs 70 is widened.

  On the other hand, when the adjusting rod 31 is rotated in the opposite direction by the handle 32, the large-diameter gear 12 and the moving shaft 39 move downward, and the adjusting disk 8 rotates clockwise by a small angle. As a result, the hook-shaped lever 61 moves outward and pulls the rod 62, so that the holders 55 and 55 rotate inward, and the gap L between the gripping portions of the grip pair 70 is narrowed.

  In the embodiment of the grip pair opening adjusting device, a manual structure is provided by rotating the handle 32. However, this can be an automated structure by controlling the drive of the servo motor device. In this case, an output shaft of a known servo motor device (not shown) is connected to one end of the adjustment rod 31. Thus, the rotation amount of the output shaft of the servo motor device corresponding to the size of the bag width of the packaging bag is set in advance and stored in the storage unit of the control device of the packaging machine. By adjusting the rotation amount of the adjusting rod by feedback control of the rotation amount of the servo motor device based on the control value of the storage unit, the opening degree of the clamping unit can be easily adjusted.

  As described above, the opening adjustment device for the grip pair in this packaging machine has a structure suitable for either manual operation or automation, and the opening adjustment of the holding portion for holding the packaging bag is controlled by the operation of the packaging machine. It can be performed safely inside, and in the case of manual operation, the operability is good because the adjusting rod is provided on the machine base side.

The longitudinal side view which shows the right half from the rotation center of the intermittent rotating shaft in the packaging machine to which the opening degree adjusting device of the grip pair of the present invention is applied. 2 is a plan view of FIG. Side view showing transmission mechanism from adjusting rod to small gear Explanatory drawing of the mechanism part that interlocks the moving shaft and adjustment disc Plan view of grip pair showing state just before sandwiching gusset bag

Explanation of symbols

2 ... Stand 3 ... Intermittent rotating shaft 6 ... Rotating body 8 ... Adjustment disk 11 ... Ring member 11a ... Male screw 12 ... Large diameter gear 12a ... Female screw 15 ... small diameter gear 31 ... adjustment rod 39 ... moving shaft 41 ... roller 51 ... support arms 55, 55 ... holder 63 ... first link 64 ... arm 66 ··· Second link 67 ··· Third link 70 ··· Grip pair L ··· Distance between gripping portions (opening angle of grip pair)
a ... Packing bag

Claims (2)

A rotating body is fixed to an intermittent rotating shaft that is freely rotatable on a stand, and a pair of holders each provided with a gripping portion constituting a grip pair are provided on a large number of support arms projecting radially from the rotating body. An adjustment disk provided so as to be horizontally rotatable within an angle range, and connecting free ends of levers provided in the respective holders by links, and being provided concentrically with the rotating body and capable of rotating toward the intermittent rotating shaft side, and one of the levers Can be interlocked via a link mechanism, and the adjusting disk is rotated clockwise or counterclockwise by the driving means, so that the interval between the sandwiching portions that sandwich the side edges of the packaging bag is increased by the bag width. An opening adjusting device for a grip pair in a packaging machine that can be adjusted according to the height,
As for the driving means, a female screw formed on the inner periphery of a large-diameter gear is screwed onto a male screw formed on the outer periphery of a ring member fixed to the stand concentrically with the intermittent rotation shaft, A small-diameter gear meshed with the radial gear is rotated by an adjusting rod provided on the machine base side so that the large-diameter gear can be moved up and down, and a moving shaft provided on the rotating body is slidable in the vertical direction. A lower end portion is placed on and supported by the upper surface of the large-diameter gear, and the moving shaft and the adjustment disc are provided so as to be interlocked via a lever mechanism, and a handle or an output shaft of a servo motor device is provided at one end portion of the adjustment rod. the installed to connect, its handle the large diameter gear and the moving shaft is moved up and down actuated by the rotation operation of the adjusting rod by a manual operation or servo motor apparatus according to a horizontal and vertical movement of the movement axis by means of a lever mechanism The grip pair of the packaging machine is characterized in that it can be adjusted in accordance with the size of the bag width by rotating the adjusting disk after changing the direction to the product. Opening adjustment device.   2. The grip pair of the packaging machine according to claim 1, wherein a roller is rotatably attached to a lower end portion of the moving shaft, and the roller is mounted on the upper surface of the large-diameter gear so as to roll. Opening adjustment device.

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