JPH01213120A - Apparatus for guiding bag opening - Google Patents

Abstract

PURPOSE:To fully widen the opening of a bag to ensure the feed of an article to the bag, by effecting a simultaneous vertical and horizontal opening of four guide plates. CONSTITUTION:Four vertically oppositely positioned guide plates 1, 1' and 1'', 1''' are opened and closed by a vertical opening and closing device which is actuated by horizontally oppositely positioned rotary solenoids 25. The horizontally oppositely positioned guide plates 1', 1''' and 1, 1'' are opened and closed by a horizontal opening and closing which is actuated by an air cylinder 77. Since the rotary solenoids 25 and the air cylinder 77 are placed into a simultaneous operation, the four guide plates are converged toward the center upon closing and diverged from the center upon opening. Upon converging, the positional relationship between the four guide plates is constant and, upon diverging, the positional relationship therebetween is adjusted by vertical and horizontal adjustment devices, whereby the guide plates can be regulated according to the size of a bag, resulting in an efficient and accurate feed of an article into bag.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a packaging device, in which a made bag is transferred by a bag gripping and moving device by holding the opening of the bag with a clip, and receiving the transferred bag. The present invention further relates to a bag opening guide device for widening the opening of the bag to facilitate the supply of objects to be packaged.

Conventional technology Conventionally, as a means of bagging objects to be packaged, a vacuum vat connected to a vacuum pump is used to spread the opening by applying suction to both sides of the opening of the bag. A method is adopted in which one side is pressed in advance, compressed air is blown into the other opening end to expand it to some extent, and a guide plate is inserted into the opened bag to open it to a predetermined size.

Problems to be Solved by the Invention Conventional bag opening means require many adjustments in the device in order to open the bag to a predetermined size, and the guide plate inserted into the bag must be replaced each time. However, there were problems with the workability of setting up the opening device and the stability of the device.

Means for Solving the Problems The bag opening guide device of the present invention has a plurality of guide plates fixed to a guide plate drive shaft, and the guide plate drive shaft is rotatably mounted on a guide plate holder via a bearing. The attached guide plate drive shaft is configured to be rotated by the rotation of a rotary solenoid fixed to the guide plate holder, and by a transmission means that transmits this rotation, and the guide plate holder is mounted on the hollow shaft. One guide plate holder is screwed onto the guide plate vertical adjustment screw which is attached via a key and inserted into the hollow shaft, and a block is attached to the end of the hollow shaft to attach the guide plate left and right opening/closing rods. A hollow shaft holder is attached to the hollow shaft via a bearing, a holder guide shaft and a left and right screw shaft for moving the hollow shaft holder are threaded onto the hollow shaft holder, and a cylinder rod for sliding the pneumatic cylinder. The cylinder rod is connected between the hollow shaft holder and the pneumatic cylinder, and the opening/closing rod head that operates the guide plate left and right opening/closing rods is attached to the end of the pneumatic cylinder. This device is equipped with a stopper that defines the height.

The guide plates having four functions are fixed to a guide plate drive shaft provided through bearings in a guide plate holder which is pivoted to two hollow shafts, and are installed facing each other vertically and horizontally.

The hollow shaft is held by a hollow shaft holder screwed onto left and right screw shafts that move the guide shaft and hollow shaft holder left and right through bearings, and by rotating the handles attached to the ends of the left and right screw shafts. The two hollow shaft holders move as the screw shaft rotates, and the distance between the hollow shaft holders approaches or moves apart. Therefore, the interval between the guide plates can be adjusted according to the movement of the hollow shaft holder. The pneumatic cylinder is moved by the cylinder rod as the hollow shaft holder moves, and the stroke of the cylinder head attached to the pneumatic cylinder can be adjusted. The swing angle of the left and right opening/closing rods of the guide plate changes depending on the stroke of this cylinder head, and the opening with the left and right opening/closing rods attached = 3 = When installing the closing rod, the block swings and rotates the hollow shaft. The guide plate holder attached to the hollow shaft via a key swings to open and close the guide plate from side to side.

A rotary solenoid is fixed to the guide plate holder, and includes an eccentric camshaft that is pivotally mounted to the rotary solenoid shaft, a first cam follower that is pivotally mounted to the eccentric camshaft, and a first cam follower that is pivotally mounted to the eccentric camshaft.
The fork lever boss combined with the cam lower,
It has a swing shaft that is pivotally attached to the fork lever boss via a linear ball bearing, a cam follower lever is attached to the intermediate shaft fixed to the fork lever boss, a second cam follower is attached to the cam follower lever, and a second cam follower is attached to the cam follower lever. The fork lever operated by the two-cam follower is pivotally attached to the guide plate drive shaft, so when the rotary solenoid is activated and rotates, the guide plate drive shaft is oscillated via the transmission mechanism, and this movement is The guide board will open and close up and down.

The four guide plates open and close vertically by actuation of a rotary solenoid, and the guide plate holder swings by actuation of a pneumatic cylinder to open and close the guide plates left and right. Since the rotary solenoid and the pneumatic cylinder operate synchronously, the four guide plates repeatedly move to spread out in all directions, and conversely move to converge in the center.

When feeding the bags to the guide plate, the guide plate is concentrated in the center to facilitate the feeding of the bags, and when the bags are fed to the guide plate, the guide plate is moved up and down and left and right and spread out. The opening of the bag can be sufficiently widened by the guide plate to ensure that the objects to be packaged can be supplied to the bag. In this way, the four guide plates are repeatedly brought together in the center and spread out to the outside, and the work of packing the objects to be packaged into the bags is repeated.

Although the guide plates 1, 1', 1///, and 1''/ of the embodiment are shown as angles, the cross-sectional shape may be rectangular. The guide plates 1, l', 1'', 1''' are arranged symmetrically in the vertical and horizontal directions, and have upper and lower opening/closing devices that open and close vertically when viewed from the side, and guide plates that face each other depending on the size of the bag. 1.
1'.

Guide plate 1.1 for adjusting the opening degree of 1", 1'''
It has a vertical height adjustment device 2 of ', 1'', 1'//.It can also be opened and closed up and down, and can also be opened and closed to the left and right when viewed from above, so that the guide plate 1.1 ', 1
", 1 /// left and right opening/closing device, and left and right width direction to adjust the opening degree of the guide plates 1.1', 1", 1''' facing each other on the left and right according to the size of the bag. It has a width adjustment device.

First, the information board 1. ．． The vertical height adjustment device 2 of 1', ]", I'" will be explained.

The hollow shafts 3 and 3' are provided oppositely and have the same function, so the configuration of one hollow shaft 3 will be described here. Bearings 4, 4' are provided at both ends of the hollow shaft 3, and a screw shaft 5 is held by these bearings 4, 4'. This screw shaft 5 is provided with a thread 6 only in its upper part, and has a cylindrical shape in its lower part. The lower guide plate holder 7 is pivotally attached to the hollow shaft via a key 8, and the threaded upper guide plate holder 9 is attached to the screw shaft 11 via a slide key 10. A key groove 12 is formed in the hollow shaft 3, and the slide key 10 moves up and down along the key groove 12, so that the threaded portion upper guide plate holder 9 is integrated with the slide key 10, so that it is guided to the hollow shaft 3 together. It moves up and down.

The slide key 10 has a threaded part 13 screwed into the screw shaft 5 in the center, and has an upper protrusion 14 and a lower protrusion 15 at the tip of the key.
The threaded part upper guide plate holder 9 is gripped by the relief part 16 in the middle part of the screw part.

When the handle 17 fixed to the end of the screw shaft 5 is rotated, the screw shaft 5 rotates. Along with this rotation, slide key 1
0 is guided by the keyway 12 of the hollow shaft 3 and slides upward or downward depending on the direction of rotation. As the slide key 10 moves, the integrated threaded upper guide plate holder 9 moves up and down. On the other hand, the lower guide plate holder 7 is attached via the keyway 12 of the hollow shaft 3 independently of the screw shaft 5, so even if the screw shaft 5 is rotated, only the upper guide plate holder 9 of the screw portion is attached. It is designed to move up and down. A lower guide plate drive shaft 18 is attached to the lower guide plate holder 7 via a bearing 17, and a lower guide plate 1.14 is attached to the end of the lower guide plate drive shaft 18 with a reinforcing member 19. 19'. An upper guide plate drive shaft 21 is similarly attached to the threaded upper guide plate holder 9 via a bearing 20, and the upper guide plates 1/, 3-/ are attached to the ends of the upper guide plate drive shaft 21.
// are fixed via reinforcing members 22.22. The vertical height adjustment device 2 for the guide plates 1゜1', 1'', 1'' is adjusted by rotating the nozzle 17 of the screw shaft 5, so that the lower guide plate holder 7 is not affected. Information board 1゜1
By keeping the same position and moving the threaded upper guide plate holder 9 up and down, only the upper guide plate 1' moves, so the distance between the opposing upper and lower guide plates 1.1' is narrowed. This shows that adjustments can be made to accommodate the size of the bag.

Next, the guide plate vertical opening/closing device 23 will be explained.

The eccentric cam shaft 2 is attached to the shaft 26 of a rotary solenoid 25 attached to the lower guide plate holder 7 via a bracket 24.
7 is pivotally attached, and a first cam follower 29 is pivotally attached to the eccentric portion 28 of the eccentric camshaft 27. A fork lever boss 30 is engaged with the cam follower 29, a linear ball bearing 32 is built into the boss portion 31, and a swing shaft 33 is pivotally attached to the cam follower 29 so as to be freely thrustable. Further, an intermediate shaft 40 is fixed to the boss portion 31 of the fork lever boss 30, and the intermediate shaft 40 is held by a bearing 41 of the lower guide plate holder 7. A cam follower lever 42 is pivotally attached to the end of the intermediate shaft 40, and a second cam follower 43 is attached to the end of the cam follower lever 42.

A fork portion 45 of a fork lever 44 pivotally attached to the end of the lower guide plate drive shaft 18 is fitted into the second cam follower 43 .

A block 46 is fixed to the end of the guide plate drive shaft 21 attached to the threaded upper guide plate holder 9 via a bearing 20, and a spherical part 47 having a spherical head is attached to the block 46. . On the other hand, an actuator lever 48 is attached to the end of the swing shaft 33 attached via the linear ball hair ring 32 of the fork lever boss 30, and the ball portion of the ball portion 47 is attached to the end of the actuator 7 lever 48. A seat 49 is provided on the ball holder into which the ball holder is fitted.

When the guide plates l, l/, 1'/, 1///'s vertical height adjustment device 2 moves the screw part upper guide plate holder 9 up and down, the ball shaft 47 also moves, so the swing axis 33 also moves up and down. do.

When the rotary solenoid 25 is actuated after the guide plate 1' is positioned by the vertical height adjustment device 2, it rotates 180 degrees, so this half rotation causes the first cam follower 29 of the eccentric camshaft 27 to operate. , swings the fork lever boss 30. For this reason, fork lever boss 3
The swing shaft 33 which is pivoted on the swing shaft 33 swings at a predetermined angle, and the ball shaft 47 and the block 46 are actuated by the actuator lever 48 installed at the tip of the swing shaft 33, and the upper drive shaft 21 is rotated. The upper guide plate 1' opens and closes.

Further, an intermediate shaft 40 is attached to the fork lever boss 30, and a cam follower lever 42 is pivotally attached to the tip of the intermediate shaft 40, so when the fork lever boss 30 is operated, the cam lever boss 42 rotates, and the second The fork lever 44 is rotated by the cam follower 43 and the lower guide plate drive shaft 1
8 to open and close the lower guide plate 1. Rotary solenoid 25 installed on the lower guide plate holder 7
By reciprocating 180 degrees, the upper guide plate 1 and the lower guide plate 1' repeatedly approach and separate from each other via an intermediate drive transmission mechanism, thereby opening and closing the opening 51 of the bag 50. Since there are two guide plates 1.1', 1'', and 11// on the upper and lower sides, we have explained one side, but the opposing upper guide plate 1'' and lower guide plate 1' will also be described. The same mechanism for opening and closing the guide plates 1'', 1''' is provided.

As described above, depending on the size of the bag 50, the lower guide plate 1 does not move up and down, and only the upper guide plate 1' moves up and down by operating the handle 17.
When the swing shaft 33 moves, the swing shaft 33 slides within the fork lever boss 30 by the linear ball bearing 32 and cooperates with the guide plate 1'. Since the fork lever boss 30 always swings the same amount of angle by the rotary solenoid 25,
Naturally, the swing shaft 33 that is swung by the swing of the fork lever boss 30 also swings at the same angle.

However, it will be easily understood that the eccentric position at which the actuator lever 48, which is pivotally attached to the tip of the swing shaft 33, swings differs depending on the upper and lower height positions of the guide plate 1'. When the guide plate 1' is positioned at the top (when the distance between the upper guide plate 1 and the lower guide plate 1' is the farthest), the maximum stroke is shown, and when the guide plate 1 is positioned at the lowest position. Minimum stroke when in position. This means that even if the upper guide plate 1' is adjusted by moving its position up and down,
The guide plate 1' is rotated by the rotary solenoid 25, and the guide plate 1.1' approaches the guide plate 1.1', but the interval at which the guide plate 1.1' approaches is always constant, and conversely, the amount of spread when they are separated varies. Normally, the shape of the guide plate 1.1' when expanded is adjusted so that the upper and lower surfaces of the guide plate 1.1' are oriented horizontally.

Next, the left and right opening/closing adjustment devices for the guide plate will be explained.

An upper guide plate holder 9 and a lower guide plate holder 7 are pivotally attached to the left and right hollow shafts 3.3' via keys 8, and have the same structure. The hollow shaft 3 is further provided with a left and right screw shaft holder 53 via a bearing 52, and the left and right screw shaft holder 53 has a left and right screw shaft 54 and a holder guide shaft 55.
is attached.

In addition, when installing the air cylinder, a link end shaft 59 that holds the 'link end 57 of the air cylinder link 56 for block movement is fixed.

The other link end 6 of this air cylinder link 56
0 is connected to a link end shaft 62 fixed to an air cylinder bracket 61. Key 13 on hollow shaft 3
An air cylinder swing shaft holder 64 is pivotally mounted via the air cylinder swing shaft holder 64. The air cylinder swing shaft holder 64
An air cylinder swing shaft 65 is slidably attached to the air cylinder swing shaft 65 via a linear ball bearing 66.

A ball shaft 67 is fixed to the end of the air cylinder swing shaft 65, and the ball bearing of the cylinder head 68 is housed in a seat 69.

The left and right threaded shaft 54 has a straight center portion 70, a left-hand thread 71 and a right-hand thread 72 on both sides, and a bearing 7 in the center portion 70.
An air cylinder holder 74 is attached via 3. A stopper holder 76 that holds a stopper 75 of the air cylinder head 68 is fixed to an end of the air cylinder holder 74. Air cylinder bracket 61 can be slid freely with air cylinder head 74
is held, and an air cylinder 77 is fixed to the air cylinder bracket 61.

When the handle 78 pivotally attached to the ends of the left and right screw shafts 54 is rotated, the screw shaft holders 53 and 53' move toward or away from each other depending on the direction of rotation of the left and right screw shafts 54. Even if the screw shaft holders 53, 53' move, the air cylinder holder 74 remains in its central position. When this screw shaft holder 53, 53' moves, air cylinder leak 56 causes air cylinder bracket 61
is held by the cylinder holder 74 while moving forward and backward. This air cylinder bracket 61
The air cylinder 77 fixed to the bracket 61 moves together with the bracket 61. This allows the stroke of the cylinder head 68 of the air cylinder 77 to be adjusted. When the cylinder head 68 protrudes, it is positioned by a stopper 75, and the swing shafts 65, 65', which are swung by the operation of the cylinder head 68, are positioned by the stopper 75.
The cylinder head 68 is adjusted so that it is aligned in a straight line when it hits the cylinder head 68. When the cylinder head 68 is moved backward by the operation of the air cylinder 77, the swing shaft 65°65' swings around the hollow shaft 3.3', so that the hollow shafts 3, 3' also rotate, and this hollow shaft 3.3' A lower guide plate holder 7 and an upper guide plate holder 9, which are pivotally connected to the upper guide plate holder 7 through a key, work together to drive a lower guide plate drive shaft held by the lower guide plate holder 7 and the threaded upper guide plate holder 9. 18
The guide plates 1, 1' fixed to the upper guide plate drive shaft 21 are opened and closed from side to side.

At the same time, the hollow shaft 3' also rotates, so that it moves toward the opposing guide plate 1.
m is also opened and closed to the left and right.

By positioning the cylinder head 68 in a protruding manner with the stopper 75, the guide plates 1/, 1/// and the guide plates 1,1'' are in a parallel state when opened, and act to open the bag 5°.Air cylinder 77 acts and the cylinder head 68 retreats, the swing axis 65.65'
As a result, the guide plates 1/, 1/// and 1,1'' approach each other and become closed.The hollow shafts 3, 3' are aligned with the direction of rotation of the handle 78, and the air cylinders The guide plate 1/, 1/// or 1.1" is moved toward or away from the holder 74, thereby determining the maximum opening size of the guide plate 1/, 1/// or 1.1". At this time, the air cylinder link 56
．． Since the cylinder bracket 79 is moved by 56', the backward stroke of the cylinder head 68 is synchronously adjusted.

Therefore, even if the spacing between the left and right guide plates 1', 1'' and the guide plates 1, 1'' is adjusted according to the size of the bag 50, when the guide plates are opened due to the action of the air cylinder 77, they will always be parallel to each other and closed. When this occurs, the structure is such that the predetermined interval G2 is maintained.

The guide plate of the present invention has four guide plates, and the guide plates 1, 1' and 1'', 1/// which are vertically opposed to each other are opened and closed by upper and lower opening/closing devices, and their driving sources are rotary drives provided on the left and right sides. It is operated by a solenoid 25. Also, there are guide plates facing left and right: 1/
, 1/// and 1,1'' are opened and closed by left and right opening/closing devices, and their driving source is the operation of an air cylinder 77.
operate synchronously, so the four guide plates 1, 1',
1" and 1''' are arranged so that they are concentrated in the center when they are narrowed, and are scattered in all directions when they are widened.The positional relationship where they are concentrated in the center is always constant, and when they are widened, they are Since the plate is adjusted by the vertical adjustment device and the horizontal adjustment device, it is expanded to the set position.

80 is a vertical seal portion, 81 is a side seal portion, 82 is a three-sided seal package, and 83 is a seal portion.

Effects of the Invention As described above, according to the present invention, the guide plate can be freely adjusted up and down or left and right according to the size of the bag, so that the objects to be packaged can be efficiently and reliably supplied to the inside of the bag. , and the fact that these adjustments can be made extremely easily is of great industrial value.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a three-sided sealed package, FIG. 2 is a perspective view of a bag obtained by the present invention, FIG. 3 is a perspective view of a model with guide plates concentrated in the center, and FIG. 4 5 is a perspective view showing a state in which the guide plate is spread out to the surroundings, FIG. 5 is a plan view showing a state in which the guide plate is opened left and right, FIG. 6 is a side view of the same, and FIG. A plan view, FIG. 8 is a side view of the same, FIG. 9 is a side view showing the vertical adjustment position of the guide plate and movement of the swing shaft, and FIG. 10 is a side view illustrating the state in which the intermediate shaft is moved together with the screw shaft holder. 11 is a plan view showing a state in which the guide plate swings left and right by an air cylinder, and FIG. 12 is a front view of the same. 1, 1', 1"1/// is a guide plate, 3, 3' is a hollow shaft, 4, 4' is a bearing, 5 is a screw shaft, 7 is a lower guide plate holder, 8 is a key, 9 is a screw upper guide plate holder,
18 is a lower guide plate drive shaft, 21 is an upper guide plate drive shaft, 2
5 is a rotary solenoid, 56 and 56' are air cylinder links, and 77 is an air cylinder.

Claims (1)

[Claims] It has a plurality of guide plates fixed to a guide plate drive shaft, and the guide plate drive shaft is held via a bearing in a guide plate holder fixed to a hollow shaft via a key, and is fixed to the guide plate holder. The upper guide plate holder of the threaded part of the threaded shaft is connected to the transmission mechanism that transmits the rotation of the rotary solenoid, and is provided in the hollow shaft via a bearing. The swing axis holder is pivotally attached via the axis holder and key, and the left and right screw axis and holder axis are attached to the left and right screw axis holders, and the air cylinder link is attached, and the air cylinder is attached to the center of the left and right screw axis. A cylinder holder to which a held air cylinder bracket is slidably attached is attached via a bearing, and these guide plates can be opened and closed vertically and horizontally by operating a rotary solenoid and an air cylinder. Bag opening guide device.