JPS6144725B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an opening closing device for a bag hung in a case.

(Prior Art) Conventionally, bags made of soft materials such as polyethylene, which are hung in cardboard cases etc. by bending the opening part to the outside of the case, are used to prevent workers from placing items inside the bags. The openings were closed one by one by hand.

(Problems to be Solved by the Invention) However, this manual work in which workers close the openings one by one is extremely inefficient, and especially when the items to be placed inside are foodstuffs. In some cases, there was a problem that it was unhygienic.

(Means for Solving the Problems) The present invention has been made to solve the problems of the conventional art. an upright holding mechanism that holds the opening of a bag that is bent outward and hung in a case in an upright position; and a gusset folding mechanism that gussets and folds the opening of a bag that is held upright by the upright holding mechanism. , a closing mechanism for closing the opening of the gusseted bag, the upright holding mechanism comprising: a hook body having a passage formed therein and an air suction port communicating with the passage; and a hook body approach/separation mechanism consisting of four mutually perpendicular rotating shafts rotatably supported by the first elevating frame so as to approach and separate the hook body; A gusset folding mechanism includes a pair of first holders that are parallel to each other and installed upright, and a pair of first holders that are parallel to each other and are installed upright opposite to the first holders, and that are oriented relative to the first holders. a pair of second holders that move toward and away from each other, and a pair of second holders that move toward and away from each other intersecting the direction in which the second holders approach and separate; and an approach/separation mechanism for relatively approaching and separating the first holding body, the second holding body, and the bending bodies, and the closing mechanism is configured to close the first lifting frame and the second lifting frame. A rotating body that is rotatably driven in conjunction with the elevation of a third elevating frame that is arranged to be able to approach and separate from the elevating frame, and an opening/closing body to which a pair of gripping rods that are supported by the rotating body and move toward and away from each other are fixed. The configuration has the following.

(Example) An example of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a lifter, and this lifter 1 is installed on a floor surface (not shown).
The lifter 1 includes a lifter frame 2, a lifter plate 3 that can be raised and lowered within the lifter frame 2,
The lifter plate 3 is raised and lowered by a lifting mechanism (not shown). 4 is a cardboard case placed on the lifter plate 3, the bottom plate 5 of this cardboard case 4 is closed, and the top plate 6 is upright. As a result, the upper end of the cardboard case 4 is open. Reference numeral 7 denotes a bag made of a soft material such as polyethylene, and the closing part 8 of the bag 7 is inserted into the cardboard case 4, and the opening part 9 is bent outside of the cardboard case 4 so that the bag 7 can be inserted into the cardboard case. It is packed in 4. Items 10, such as electrical parts or food, are stored in the bag 7. Reference numeral 11 denotes a frame (not shown) installed on the floor surface, and an upright guide rod 12 is fixed to this frame 11. A first head 13 is slidably supported on the guide rod 12, and the first head 13 is moved up and down while being guided by the guide rod 12 by a lifting mechanism (not shown). In FIGS. 2 and 3, a horizontal support 1 is provided at the tip of the first head 13.
A rectangular through hole 15 having an area larger than the cross-sectional area of the cardboard case 4 and extending vertically therethrough is formed inside the support body 14 . Then, as the first head 13 moves up and down,
The support body 14 moves up and down while surrounding the cardboard case 4. A pair of brackets 16 and 17 are attached to the lower surface of each side of the support 14, respectively. Reference numeral 18 denotes four rotation shafts perpendicular to each other, and the rotation shafts 18 are rotatably supported by the brackets 16 and 17, respectively, so as to be located on the lower surface of each side of the support body 14. Bevel gears 19 and 20 are attached to both ends of the rotating shaft 18, respectively, and the bevel gears 19 and 20 of the rotating shaft 18 mesh with the bevel gears 19 and 20 of the other rotating shaft 18, respectively. As a result, when any rotation shaft 18 rotates, the remaining rotation shafts 18 are rotated in conjunction with each other via the bevel gears 19 and 20. The lower ends of brackets 21 and 22 are fixed to the front ends of the two rotating shafts 18 extending in the front-rear direction, respectively. Reference numeral 23 denotes a fluid cylinder, and the rear end of the fluid cylinder 23 is rotatably connected to the upper end of the bracket 21 via a pin 24. The tip of the piston rod 25 of the fluid cylinder 23 is rotatably connected to the upper end of the bracket 22 via a pin 26. As a result, the fluid cylinder 23 operates and its piston rod 25 protrudes or retracts, thereby causing the four rotation shafts 18 to rotate in conjunction with each other via the bevel gears 19 and 20. A pair of sleeves 27, 28 is fixed to each rotating shaft 18 between the brackets 16, 17, and one ends of L-shaped arms 29, 30 are fixed to the sleeves 27, 28, respectively.
Hook bodies 31 and 32 are fixed to the other ends of the arms 29 and 30, respectively. These hooking bodies 31 and 32 move toward and away from the outer surface of the cardboard case 4 as the respective rotation shafts 18 rotate and the arms 29 and 30 swing. In this way, since the pair of hooking bodies 31 and 32 are attached to the four rotating shafts 18 via the arms 29 and 30, there are a plurality of hooking bodies, and also, These hook bodies are arranged so as to surround the outside of the cardboard case 4. The first head 13, support body 14, and brackets 16 and 17 described above constitute a first elevating frame 33 that can be raised and lowered as a whole, and the rotating shaft 18, bevel gears 19 and 20, brackets 21 and 22, and the fluid cylinder 23, pins 24, 26, sleeves 27, 2
8. The arms 29, 30 as a whole are the hooking body 3
A hooking body approach/separation mechanism 34 is configured to move the hooks 1 and 32 toward and away from the cardboard case 4.
As shown in FIG. 4, each of the hooking bodies 31 and 32 has a parallel surface 35 that is substantially parallel to the outer surface of the cardboard case 4, and a parallel surface 3 that is continuous with the upper end of the parallel surface 35.
5 and a right-angled surface 36 extending substantially perpendicularly in a direction away from the outer surface of the cardboard case 4. A passage 37 is formed inside each of the arms 29, 30, and one end of this passage 37 is connected to a vacuum pump (not shown) via a hose (not shown). In addition, each hook body 31,
A passage 38 is formed inside the passage 32.
8 communicates with the other end of the passage 37. A plurality of air suction ports 39 are formed in the parallel surfaces 35 of the hooks 31 and 32 at predetermined intervals in the vertical direction, and these air suction ports 39 communicate with the passage 38 . As a result, when the vacuum pump is activated, the passages 37 and 38
Air is sucked from the air suction port 39 through the air suction port 39. As the elevating frame 33 rises, the right-angled surfaces 36 of the hooks 31 and 32 hook the opening 9 of the bag 7 hung on the cardboard case 4 to make it stand upright, and the air is sucked. The suction force of the mouth 39 holds the opening 9 of the bag 7 in an upright position. The aforementioned hooking body 31, 3
2. The first elevating frame 33 and the hook approach/separation mechanism 34 constitute an upright holding mechanism 40 as a whole, and this upright holding mechanism 40 has its opening 9 bent to the outside of the cardboard case 4 to hold the upright holding mechanism 40. The opening 9 of the bag 7 hung upright is held. Referring again to FIG. 1, the lower end of a vertical guide rod 50 is fixed on the frame 11, and a second head 51 is slidably supported on the guide rod 50. A support block 52 is fixed to the tip of the second head 51 located directly above the cardboard case 4, and as shown in FIGS. A pair of parallel fourth shafts 53 and 54 are rotatably supported. Further, at the lower part of the support block 52, a pair of third shafts 55 extending directly below and parallel to the fourth shaft 53 and the first shaft 54,
The second shafts 56 are each rotatably supported. Links 57 and 58 are provided at the front and rear ends of the fourth shaft 53, respectively.
One end of is fixed. Furthermore, one ends of links 59 and 60, which are parallel to and have the same length as the links 57 and 58, are attached to the front and rear ends of the third shaft 55, respectively. 61 and 62 are a pair of vertical supports, the vertical support 61 being rotatably connected to the other ends of the links 57 and 59, and the vertical support 62 being rotatably connected to the other ends of the links 58 and 60. Can be freely connected. 6
3 and 64 are a pair of vertical second holders, and these second holders 63 and 64 are connected to the vertical supports 61 and 6.
2 can be attached to each. These second holders 63 and 64 can come into contact with the inner surface of the opening 9 of the bag 7 held upright by the upright holding mechanism 40. One ends of links 65 and 66 are fixed to the front and rear ends of the first shaft 54, respectively. Further, the link 6 is provided at the front and rear ends of the second shaft 56.
Links 67 and 68 parallel to and of equal length to 5 and 66
One end of each is fixed. 69 and 70 are a pair of vertical supports, and the vertical supports 69
is rotatably connected to the other ends of the links 65 and 67, and a vertical support 70 is rotatably connected to the other ends of the links 66 and 68. 71 and 72 are a pair of vertical first holders, and these first holders 7
1 and 72 are attached to the vertical supports 69 and 70, respectively. This first holding body 71,
72 can abut on the inner surface of the opening 9 of the bag 7 in an upright state, and when the second holder 63 abuts on the inner surface of the opening 9 of the bag 7, 64 to hold the bag 7 by friction so that its opening 9 is rectangular. Reference numeral 73 denotes a fluid cylinder installed on the upper surface of the second head 51, and this fluid cylinder 73 extends perpendicularly to the first axis 54. One end of a link 75 is rotatably connected to the tip of a piston rod 74 of this fluid cylinder 73. The other end of the link 75 is the first shaft 54
Fixed. As a result, the fluid cylinder 73 operates and its piston rod 74 protrudes or retracts, causing the link 75 to move toward the first shaft 5.
The first shaft 54 rotates by swinging about the center of swing. 77, 76 are the second shafts 56;
A first gear and a second gear are respectively attached to the central part of the third shaft 55 in the axial direction.
The gear 77 and the second gear 76 mesh with each other. As a result, as the first shaft 54 rotates, the second shaft 5
6. The third axis 55 and the fourth axis 53 are links 65, 6
6, 67, 68, 59, 60, 57, 58, vertical support 69, 70, 61, 62, first gear 77,
It rotates in conjunction with the first shaft 54 via the second gear 76. And these axes 53, 54, 55, 5
6 rotate in conjunction with each other, the second holders 63, 64 and the first holders 71, 72 move toward and away from each other in synchronization. At this time, the link 5
7,59, vertical support 61 and links 58,6
0, the vertical support 62 comprises a pair of second parallel crank mechanisms, the links 65 and 67, and the vertical support 69
The links 66, 68 and the vertical support 70 constitute a pair of first crank mechanisms. 78, 79
is a pin attached to the support block 52.
The pin 78 supports the swinging arm 80 so as to be swingable in the horizontal plane, and the pin 79 supports the swinging arm 81 so as to be swingable in the horizontal plane. 82 has 4th end on one end
This is a link fixed to the shaft 53. This link 8
2, one end of a link 83 is rotatably connected to the other end of the link 83, and the other end of the link 83 is connected to a swing arm 81.
It is rotatably connected to one end of the. As a result,
As the fourth shaft 53 rotates, the swing arm 81
is configured to swing in a horizontal plane via links 82 and 83. 84 is a link whose one end is fixed to the first shaft 54. One end of a link 85 is rotatably connected to the other end of this link 84 . The other end of the link 85 is rotatably connected to one end of the swing arm 80, and when the first shaft 54 rotates, the swing arm 80 swings in a horizontal plane via the links 84 and 85. ing. As a result, the first and second holding bodies 71, 72, 63, 64 and the swinging arms 80, 81 are connected to the shafts 54, 56, 5.
5 and 53, they move toward and away from each other and oscillate in conjunction with each other. The upper end of a vertical support 86 is fixed to the other end of the swing arm 80.
A vertical bending body 87 is fixed to 6. Further, the upper end of a vertical support 88 is fixed to the other end of the swing arm 81, and a vertical bending body 89 is attached to this vertical support 88. The bent bodies 87 and 89 are formed by rotating the first shaft 54 and the fourth shaft 53 and swinging the swinging arms 81 and 80 in a horizontal plane, so that the bending bodies 87 and 89 move toward and away from each other while maintaining the vertical state. 1. Second holding body 71, 7
2, 63, and 64 are moved close to each other and separated from each other. When these bent bodies 87 and 89 move close to each other, they come into contact with the outer periphery of the opening 9 of the bag 7, and the first and second folded bodies 87 and 89
The opening 9 of the bag 7 between the holders 71, 72, 63, and 64 is bent inward and gusseted. Said second
As shown in FIG. 6, a passage 90 is formed inside the holder 63, and one end of the passage 90 is connected to a vacuum pump (not shown) via a pipe (not shown). An air suction port 91 is formed at the lower end of the second holding body 63.
communicates with the passage 90. As a result, the air inside the gusseted bag 7 is sucked through the air suction port 91. Note that the second holding body 64 described above,
Similarly to the second holder 63, passages and air suction ports are formed in the first holders 71 and 72;
2, 63, and 64 at least one of the lower ends thereof. The aforementioned second head 51 and support block 52 constitute a second elevating frame 92 that can be raised and lowered as a whole, and the aforementioned shaft 53,
54, 55, 56, link 57, 58, 59, 6
0, the links 65, 66, 67, 68, the vertical supports 61, 62, 69, 70, the fluid cylinder 73, the link 75, and the gears 76, 77 collectively constitute an approach/separation mechanism 93, and this approach/separation mechanism 93 The first and second holding bodies 71, 72, 63, and 64 are moved toward and away from each other in synchronization. In addition, the first mentioned above,
Second holding bodies 71, 72, 63, 64, bending bodies 87, 89, lifting frame 92, approach/separation mechanism 9
3 constitutes a gusset folding mechanism 94 which gussets and folds the opening 9 of the bag 7 held upright by the bag upright holding mechanism 40. 7th
In the figure, 101 is an axis parallel to the fourth shaft 53 fixed to the frame 11 located on one side of the lifter 1, and 102 is a first shaft fixed to the frame 11 on the other side of the lifter 1. 54
is an axis parallel to Triangular swing plates 103 and 104 are swingably supported on the shafts 101 and 102, respectively. 105 is a fluid cylinder, and the rear end of this fluid cylinder 105 is rotatably connected to the swing plate 104. fluid cylinder 1
The tip of the piston rod 106 of 05 is rotatably connected to the swing plate 103. Then, the fluid cylinder 105 operates and the piston rod 10
6 protrudes or retracts, the swing plates 103 and 104 swing around the shafts 101 and 102, respectively. 107 is an axis parallel to the axis 101 fixed to the frame 11 below the axis 101, and 108 is an axis parallel to the axis 102 fixed to the frame 11 below the axis 102. Links 10 are attached to the swing plates 103 and 104.
One ends of the links 109 and 110 are rotatably connected to each other, and the other ends of the links 109 and 110 are connected to the shaft 1.
It is rotatably connected to V-shaped rocking bodies 111 and 112, which are swingably supported by 07 and 108, respectively. And these rocking bodies 111, 112
The link 10 is rotated by the swing plates 103 and 104 swinging about the shafts 101 and 102.
9 and 110, respectively, and swing around shafts 107 and 108, respectively. The rocking body is 111,11
One end of support plates 113, 114 is fixed to 2,
These support plates 113 and 114 are connected to the swing plate 11.
It oscillates with the oscillation of 1,112. Support plate 11
Deaeration plates 115 and 1 are provided at the other ends of 3 and 114, respectively.
One end of 16 is rotatably connected. When the piston rod 106 of the fluid cylinder 105 is retracted and the support plates 113, 114 are swung downward, one end of the deaeration plates 115, 116 is connected to a bag near the inner surface of the cardboard case 4. 7
can come into contact with the outer surface of the 117,118
are fluid cylinders rotatably connected to support plates 113 and 114, respectively, and piston rods 119 and 120 of these fluid cylinders 117 and 118
The tips of the degassing plates 115 and 116 are rotatably connected to the widthwise central portions of the degassing plates 115 and 116. And fluid cylinder 1
17, 118 are activated and the piston rod 119,
By protruding or retracting the deaeration plates 115 and 116, the shafts 101 and 102, the swing plates 103 and 104, the fluid cylinder 105, and the shaft 10 swing around one end thereof.
7, 108, links 109, 110, rocking body 11
1, 112, support bodies 113, 114, deaeration plate 11
5, 116, fluid cylinders 117, 118 constitute a degassing mechanism 121 as a whole, and this degassing mechanism 1
Reference numeral 21 is designed to press the gusset-folded bag 7 against the article 10 placed in the bag 7 to remove the air inside the bag 7. In FIGS. 8, 9, and 10, a moving frame 130 that can approach and move away from the lifter 1 is arranged on one side of the lifter 1,
This moving frame 130 has a vertical guide rail 1
31 is fixed, and vertical grooves 132 are formed on both sides of the guide rail 131, respectively. A vertical rack 133 is fixed to the other end surface of the guide rail 131. 134 is a vertically movable box, and at one end of this vertically movable box 134 is a roller 13 that rolls into contact with the groove 132 of the guide rail 131.
5 is rotatably supported. As a result, the vertically movable box 134 can be raised and lowered while being guided by the guide rail 131. Vertical movement box 134
A rotary actuator 136 is fixed to the rotary actuator 136, and a sprocket wheel 138 is fixed to the rotating shaft 137 of the rotary actuator 136. A bearing body 139 is fixed to the vertical movement box 134 on one side of the rotary actuator 136, and a rotating shaft 140 parallel to the rotating shaft 137 of the rotary actuator 136 is rotatably supported on this bearing body 139. . A sprocket wheel 141 is fixed to the rotating shaft 140, and a chain 142 is stretched between the sprocket wheel 141 and the sprocket wheel 138. As a result, when the rotary actuator 136 is actuated and its rotating shaft 137 rotates, the rotating shaft 140 is rotated by the sprocket wheel 13.
8, chain 142, sprocket wheel 14
1 and is driven and rotated. A gear 143 is fixed to the center of the rotating shaft 140 in the axial direction, and this gear 143 meshes with the rack 133. As a result, the rotating shaft 140 rotates together with the gear 143, so that the vertical movement box 134 moves up and down.
Further, a large diameter sprocket wheel 14 is attached to the rotating shaft 137 of the rotary actuator 136.
4 is fixed. A rotary shaft 145 is rotatably supported by the vertical movement box 134 on the other side of the rotary actuator 136, and its axis of rotation is perpendicular to the vertical movement direction of the vertical movement box 134. is fixed. A chain 147 is stretched between the sprocket wheel 146 and the sprocket wheel 144, and as the rotating shaft 137 of the rotary actuator 136 rotates, the rotating shaft 145 connects the sprocket wheel 144, the chain 147, and the sprocket. It is adapted to be driven and rotated via a wheel 146. As a result,
The rotating shaft 145 is a rotary actuator 136
Due to the rotation of the rotating shaft 137, the vertical movement box 1
It rotates in conjunction with the lifting and lowering of 34. A disc body 148 is fixed to a rotating shaft 145 in the vertical movement box 134, and a pair of shafts 149 and 150 parallel to the rotating shaft 145 are fixed to this disc body 148, as shown in FIG. Opening and closing bodies 151 and 152 are rotatably supported on these shafts 149 and 150, respectively. The opening/closing body 151 includes a cylindrical cylindrical portion 153,
A protruding support portion 153 integrally formed with the cylindrical portion 153 at the tip of the cylindrical portion 153;
A support portion 15 is formed integrally with the rear end of 3.
an engaging portion 155 protruding from 4 at a predetermined angle;
has. The opening/closing body 152 also includes a cylindrical cylindrical portion 156, a protruding support portion 157 integrally formed at the tip of the cylindrical portion 156, and a protruding support portion 157 integrally formed at the rear end of the cylindrical portion 156. The engaging portion 15 is formed and projects from the supporting portion 157 at a predetermined angle.
8 and has. The engaging parts 155 and 158 may overlap in the axial direction of the rotating shaft 145. Both ends of a tension spring 159 are engaged with the supports 154 and 157 of the opening and closing bodies 151 and 152, respectively.
9 connects the opening/closing bodies 151, 152 to their supporting parts 154,
157 are pulled closer together. Disc body 14
A vertical fluid cylinder 160 is fixed to the side surface of the vertically movable box 134 above 8, and the tip of a piston rod 161 of this fluid cylinder 160 can engage with the engaging portions 155 and 158.
Then, when the fluid cylinder 160 is operated and the piston rod 161 is retracted, the piston rod 1
The tip of the piston rod 61 is separated from the engaging portions 155, 158 of the opening/closing bodies 151, 152, and when the fluid cylinder 160 is operated and the piston rod 161 protrudes, the tip of the piston rod 161 is separated from the engaging portion 1.
55, 158 to push the opening/closing bodies 151, 152 against the tension spring 159.
4,157 are rotated so that they are separated. A pair of gripping rods 162 and 163 extending parallel to the rotating shaft 145 are fixed to the supporting parts 154 and 157, respectively. And this gripping rod 162,1
The opening/closing bodies 151, 152 move toward and away from each other as they rotate, and when they approach each other, they grip the opening 9 end of the gusseted bag 7.
The above-mentioned vertical movement box 134 and roller 135 collectively constitute a third elevating frame 164, and this elevating frame 164 is supported by the movable frame 130 so as to be movable up and down.

In addition, the aforementioned rotating shaft 145, sprocket wheel 146, disc body 148, shafts 149, 150
constitutes a rotating body 165 as a whole, and this rotating shaft 165 is rotatably supported by the elevating frame 164 so as to be perpendicular to the elevating direction of the elevating frame 164, and is driven and rotated in conjunction with the elevating and lowering of the elevating frame 164. In addition, the aforementioned opening/closing bodies 151, 15
2, tension spring 159, fluid cylinder 16
1,160 as a whole, a pair of gripping rods 16;
Approach/separation mechanism 1 for approaching and separating 2,163 from each other
65. The aforementioned gripping rod 162,1
63, the elevating frame 164, the rotating body 165, and the approach/separation mechanism 166 collectively constitute a closing mechanism 167 that opens the opening 9 of the bag 7 folded into a gusset. This closing mechanism 167 moves the pair of gripping rods 162 and 163 toward and away from the approaching/separating mechanism 166.
After the bag 7 is brought close to each other and the open end of the bag 7 is grasped, the lifting frame 164 is lowered, and the rotating body 165 is lowered while rotating in conjunction with the lowering of the lifting frame 164. The opening 9 of the bag 7 is closed by rolling the opening 9 into a roll. Note that the aforementioned closing mechanism 167 may be one that heat-seals the opening 9 of the bag 7. 180
is a shaft fixed to the frame 11, and a substantially triangular connecting plate 181 is rotatably supported on this shaft 180. 182 is a vertical fluid cylinder fixed to the frame 11, and the tip of a piston rod 183 of this fluid cylinder 182 is rotatably connected to the connecting plate 181. When the fluid cylinder 182 operates and the piston rod 183 protrudes or retracts, the connecting plate 181 rotates about the shaft 180. One end of an arm 184 is connected to the connecting plate 181, and a pushing head 185 is fixed to the other end of this arm 184. Reference numeral 186 denotes a compression spring whose one end is locked to the pushing head 185, and the other end of this compression spring 186 is locked to the pushing body 187. This pushing body 187
A cover 188 and a push-in member 189 made of urethane foam etc. are housed inside the cover 188.
It consists of and. The pushing body 187 is configured to push the opening 9 of the rolled bag 7 into the cardboard case 4 when the connecting plate 181 rotates downward together with the arm 184. The aforementioned shaft 180 and connecting plate 1
81, the fluid cylinder 182, the arm 184, the pushing head 185, the compression spring 186, and the pushing body 187 constitute a pushing mechanism 190 as a whole, and this pushing mechanism 190 is rolled into a roll to open the closed opening of the bag 7. It acts to push it into the cardboard case 4. In addition, 19
1 is an air suction pipe fixed to the central lower surface of the support block 52, and this air suction pipe 191
An air suction port is formed at the lower end, and the upper end is connected to a vacuum pump (not shown).

Next, the effect will be explained.

First, in the preparation process, the cardboard case 4
Close the bottom plate 5 of. The top plate 6 is held upright. As a result, the upper end of the cardboard case 4 is opened. Next, the closing part 8 of the bag 7 made of a soft material such as polyethylene is inserted into the cardboard case 4 by an insertion mechanism (not shown), and the opening part 9 is bent to the outside of the cardboard case 4. As a result, the bag 7 is hung on the cardboard case 4 as shown in FIG. Then,
A predetermined amount of articles 10, such as electrical articles or food, is put into the bag 7 by an article supply mechanism (not shown). In the case of this embodiment, a highly viscous fluid such as butter is introduced. Next, the cardboard case 4 is positioned and placed on the lifter plate 3 of the lifter 1 by a supply mechanism (not shown). At this time, if the heights of the cardboard cases 4 are different, the lifter plate 3 is raised and lowered by a lifting mechanism (not shown) so that the upper end of the top plate 6 to the cardboard case 4 is always at a constant height. Next, in the first step, a lifting mechanism (not shown) is operated to lower the first head 13. When the hooks 31 and 32 have descended below the edge of the opening 9 of the bag 7 on the outside of the cardboard case 4, the operation of the lifting mechanism (not shown) is stopped and the first head 13 is opened. Stop the descent. At the same time as the first head 13 is lowered, an elevating mechanism (not shown) is also operated, and the second head 5 is lowered.
1 descends while being guided by the guide rod 50.
When the second head 51 is lowered, the lower ends of the first and second holding bodies 71, 72, 63, and 64 are inserted into the upper end opening of the cardboard case 4 by a predetermined amount, and the bent bodies 87 and 89 are When the lower end descends to a position a predetermined distance above the upper end of the cardboard case 4, it stops. The first mentioned above
Hooking bodies 31 and 32 that are hooked by lowering the head 13
are arranged so as to surround the outside of the cardboard case 4. The state at this time is shown in FIG. Next, the fluid cylinder 23 is actuated to cause its piston rod 25 to protrude. As a result, bracket 2
1 and 22 swing around the rotation shaft 18 so that their upper ends are separated from each other. As a result, the four rotation shafts 18 rotate in conjunction with each other via the bevel gears 19 and 20. As a result, the arms 29 and 30 swing about the rotation shaft 18 so that their lower ends approach the outer surface of the cardboard case 4. and,
When the parallel surfaces 35 of the hooks 31 and 32 come into contact with the outer surfaces of the cardboard case 4, the operation of the fluid cylinder 23 is stopped. The state at this time is shown by imaginary lines in FIG. next,
The passage 37 is opened by operating a vacuum pump (not shown).
Parallel surface 35 of hooking bodies 31, 32 via 38
Air is sucked through an air suction port 39 formed in the air. Next, the lifting mechanism (not shown) is operated again to raise the first head 13. As a result, the hooks 31 and 32 rise while their parallel surfaces 35 are in contact with the outer surface of the cardboard case 4. By rising, the right angle surface 36 of the hooking bodies 31, 32
engages with the edge of the opening 9 of the bag 7 hung on the cardboard case 4. In this state, the first head 1
3 further rises, the right angle surfaces 36 of the hooking bodies 31 and 32 rise while hooking the opening 9 of the bag 7, gradually making the opening 9 of the bag 7 upright. At this time, since air is sucked from the air suction ports 39 formed in the hooks 31 and 32 as described above, the opening 9 of the bag 7 is connected to the hooks 31 and 32.
32 gradually stands upright. and,
When the opening 9 of the bag 7 is completely erected, the first head 13 stops rising. At this time, the opening 9 of the bag 7 is held upright in a rectangular shape by the suction force of the air suction ports 39 of the hooks 31 and 32, and is not bent. The state at this time is shown by the solid line in FIG. Next, in a second step, the fluid cylinder 73 is actuated to cause its piston rod 74 to protrude. As a result, the link 75 swings about the first shaft 54 as a swing center. As a result, the first shaft 54 rotates in the direction opposite to the direction indicated by the arrow. This rotation of the first shaft 54 is caused by the links 65, 6
6, vertical supports 69, 70, links 67, 68,
First gear 77, second gear 76, links 59, 6
0, are transmitted to the second shaft 56, the third shaft 55, and the fourth shaft 53 via the vertical supports 61, 62 and the links 57, 58, respectively, and these second shaft 56, third shaft 5
5. The fourth shaft 53 is interlocked and rotated in the direction opposite to the direction of the arrow. As a result, the first and second holding bodies 71, 7
2, 63, and 64 move upward and away from each other. These first and second holding bodies 7
1, 72, 63, 64 come into contact with the inner surface of the opening 9 of the bag 7 held upright, the operation of the fluid cylinder 73 is stopped. As a result, the opening 9 of the bag 7 is
The opening is held in a rectangular shape by friction with 4. The state at this time is the third state.
5 and 14. Next, the fluid cylinder 73 is actuated again and its piston rod 74
can be withdrawn. As a result, the first axis 54, the second axis 5
6. The third shaft 55 and the fourth shaft 53 rotate in conjunction with each other in the direction of the arrow. By the rotation of the first shaft 54, second shaft 56, third shaft 55, and fourth shaft 53, the first and second shafts are rotated.
The holders 71, 72, 63, and 64 approach each other while maintaining their vertical state. At this time, the link 5
7, 59, vertical holding body 61 and links 58, 6
0, the vertical support 62 constitutes the second parallel crank mechanism, and the links 65, 67, the vertical supports 69, the links 66, 68, and the vertical support 70 constitute the first parallel crank mechanism. Holder 7
1, 72 and second holders 63, 64 gradually descend and approach each other. As a result, the opening 9 of the bag 7 and the first and second holders 71, 72, 63, 64
No vertical slip occurs between the two. When the aforementioned fluid cylinder 73 operates and its piston rod 74 retracts, the links 83, 8
5 moves in the direction of the arrow via links 82 and 84. As a result, the swing arms 80 and 81 swing as indicated by the arrows in FIG. 5 in conjunction with the approach movement of the first and second holders 71, 72, 63, and 64. As a result, the bent bodies 87, 89 are the first,
While maintaining the vertical state between the second holders 71, 72, 63, and 64, the second holders 71, 72, 63, and 64 move horizontally in an arc as shown by the arrows in FIG. As a result, the bent bodies 87, 89
move closer to each other and come into contact with the outer periphery of the opening 9 of the bag 7, and the first and second holders 71, 72, 6
Fold the opening 9 of the bag 7 between 3 and 64 inward. As a result, the opening 9 of the bag 7 is folded into a so-called gusset. The state at this time is shown in FIG. If the bag 7 has different dimensions, it may be folded into a gusset as shown in FIG. Next, in the third step, the fluid cylinder 23
is operated again to cause the piston rod 25 to further protrude by a predetermined amount. As a result, the hooking body 31,
32 move inwardly from the position in which the opening 9 of the bag 7 is held upright so as to move closer to each other, as shown in phantom lines in FIG. Next, the elevating mechanism is operated again to lower the first head 13. When the lower ends of the hooks 31 and 32 are lowered to engage the inner surface of the top plate 6 of the cardboard case 4, the fluid cylinder 23 is actuated to retract the piston rod 25. As a result, the hooks 31 and 32 gradually move outward so as to be separated from each other while descending, and the four top plates 6 of the cardboard case 4 are respectively bent outward. When the top plate 6 of the cardboard case 4 is completely bent outward, the lowering of the first head 13 is stopped and the operation of the fluid cylinder 23 is also stopped. The state at this time is shown by the solid line in FIG. Then, in a fourth step, the fluid cylinder 105 is actuated to retract its piston rod 106. As a result, the swing plate 103,
104 swings around shafts 101 and 102, and the swinging of these swing plates 103 and 104 is caused by the link 1
The signal is transmitted to the rocking bodies 111 and 112 via 09 and 110. As a result, the swinging bodies 111 and 112 swing downward together with the support plates 113 and 114. The swinging of the swinging bodies 111 and 112 is stopped when the other ends of the support plates 113 and 114 come into contact with the outer surface of the bag 7 as shown in FIG. Then,
The fluid cylinders 117, 118 actuate and their piston rods 119, 120 protrude. As a result, the deaeration plates 115 and 116 swing to remove the bag 7 from the article 1.
Push it to 0. As a result, the bag 7 is brought into close contact with the article 10, and the air inside the bag 7 is released to the outside. At this time, a vacuum pump (not shown) is also operated at the same time, and as a result, the air inside the gusseted bag 7 is sucked through the air suction port 91 through the passage 90 and discharged to the outside. Next, in the fifth step, the movable frame 130 is moved from the position shown by the solid line in FIGS. 18 and 19 to approach the cardboard case 4 by a moving mechanism (not shown).
This movement of the moving frame 130 causes the gripping rods 162 and 163 to move to a position where they completely pinch the upper end of the opening 9 of the gusset-folded bag 7, as shown by imaginary lines in FIGS. 18 and 19. It will stop when At this time, the fluid cylinder 105 is also actuated and its piston rod 106 protrudes. As a result, the support plates 113 and 114 swing upward and return to their original positions. Next, actuate the fluid cylinder 160 to retract its piston rod 161,
The tip of the piston rod 161 is connected to the engaging portion 155,1
58. As a result, the opening/closing body 151,
152 is rotated by the tensile force of its tension spring 159 so that its supporting parts 154 and 157 approach each other. As a result, the gripping rods 162, 16
3 grips the upper end of the opening 9 of the gusseted bag 7. At this time, the first and second holders 71, 72, 63, 64 are still inserted into the opening 9 of the bag 7, and these first, second holders 71, 72, 63, Air is sucked from the air suction port 91 of 64. At this time, the air inside the bag 7 is removed by the air suction pipe 191. Next, the second head 51 is raised by operating a lifting mechanism (not shown). As a result, the first and second holders 71, 72, 63, 64 rise and are extracted from the opening 9 of the bag 7. At this time, since the gripping rods 162 and 163 are pulled closer to each other by the action of the tension spring 159, the first and second holding bodies 71, 72, 63, and 64 are held at the opening of the bag 7. Even when the bag 7 is pulled out of the bag 9, the opening 9 of the bag 7 remains gusseted and held upright. The state at this time is shown in FIG. Next, the rotary actuator 136 is operated to rotate its rotating shaft 137. The rotation of this rotating shaft 137 is controlled by the sprocket wheel 138 and the chain 14.
2. Sprocket wheel 141, rotating shaft 140
is transmitted to gear 143 via
Rotate. This gear 143 is a vertical rack 13
3, the vertical movement box 134
descends while being guided by the guide rail 131.
The rotation of the rotating shaft 137 of the rotary actuator 136 described above is also transmitted to the rotating shaft 145 via the sprocket wheel 144, chain 147, and sprocket wheel 146, causing the rotating shaft 145 to rotate. The rotation of this rotating shaft 145 is caused by the rotation of the disc body 148, the shafts 149, 150, and the opening/closing body 15.
1,152 to the gripping rods 162, 163, and the gripping rods 162, 163 are connected to the rotating body 1.
Rotate around the rotation axis of 65. As described above, the rotation of the gripping rods 162 and 163 is linked to the lowering of the vertical movement box 134.
Since the gripping rods 162, 163 rotate while descending in this manner, the opening 9 of the bag 7 gripped by the gripping rods 162, 163 is closed.
The state at this time is shown in FIG. Next, in the sixth step, the fluid cylinder 182 is actuated to cause its piston rod 183 to protrude.
As a result, arm 184 swings downward. The swinging of the arm 184 is stopped once when the pushing member 189 of the pushing body 187 lightly contacts the gripping rods 162, 163 through the openings 9, as shown in FIG. In this state, the moving frame 130 is moved away from the cardboard case 4. As a result, the gripping rod 162,
163 is the opening 9 of the bag 7 rolled up into a roll.
extracted from. At this time, as described above, the pushing member 189 of the pushing body 187 is in light contact with the gripping rods 162, 163 through the opening 9, so that the opening 9 of the rolled bag 7 will not unravel. is prevented. The fluid cylinder 182 is then actuated again to remove its piston rod 18.
Make 3 stand out. As a result, the arm 184 swings further downward, and the pushing body 187 pushes the opening 9 of the rolled bag 7 into the cardboard case 4.
Push it inside. The state at this time is shown in FIGS. 12 and 13. The fluid cylinder 182 is then actuated to retract its piston rod 183. As a result, the arm 184 swings upward and returns to its original position. The state of the cardboard case 4 and bag 7 at this time is shown in FIG. The above is one cycle of action, and this cycle is repeated thereafter.

(Effects of the Invention) As explained above, according to the present invention, the opening of a bag hung in a case can be closed efficiently and hygienically, and in particular, the opening of a bag folded into a gusset can be closed. Since it is rolled up into a roll, the opening of the bag can be completely closed. In addition, labor savings can be expected and automation of the closing work is also possible.

[Brief explanation of the drawing]

The attached drawings show an embodiment of the opening closing device for a bag hung in a case according to the present invention, and FIG. 1 is a partially cutaway side view of the vicinity of the upright holding mechanism and the gusset folding mechanism. , FIG. 2 is a partially cutaway side view of the upright holding mechanism, FIG. 3 is a sectional view taken along arrow A-A in FIG. 2, and FIG. 4 is B-- in FIG. 3.
B is an enlarged sectional view, FIG. 5 is a perspective view of the gazette folding mechanism, FIG. 6 is an enlarged sectional view taken along CC in FIG. 5, FIG. 7 is a side view of the degassing mechanism, and FIG. 8 is a side view of the closing mechanism. Figure 9 is a sectional view taken along the line D-D in Figure 8, and Figure 10 is
The figure is a sectional view taken along the line E-E in Figure 8, and Figure 11 is a cross-sectional view taken along the line E-E in Figure 8.
Fig. 12 is a side view of the pushing mechanism, Fig. 13 is a sectional view taken along G-G in Fig. 12,
Figures 14 and 15 are plan views for explaining the operation of gusset folding, Figure 16 is a plan view showing another form of gusset folding, and Figure 17 is a side view for explaining the operation of folding the top plate of a cardboard case. Figure, 1st
Figure 8 is a side view for explaining the movement of the closing mechanism;
Figure 19 is a view taken along arrow H--H in Figure 18, Figure 20 is a side view showing the gripping rod gripping the opening of the bag, and Figure 21 shows the opening of the bag being gripped by the gripping rod. FIG. 22 is a side view illustrating a state in which the pushing body is in light contact with the gripping rod through the opening, and FIG. It is a sectional view explaining the state of the bag. 4 is a case, 7 is a bag, 9 is an opening, 40 is an upright holding mechanism, 94 is a gazette folding mechanism, and 167 is a closing mechanism.

Claims (1)

[Claims] 1. An upright holding mechanism that holds the opening of a bag bent outside the case and hung in the case in an upright position, and a gusset that gussets and folds the opening of a bag that is held upright by the upright holding mechanism. a hook body comprising a folding mechanism and a closing mechanism for closing the opening of the gusseted bag, the upright holding mechanism having a passage formed therein and an air suction port communicating with the passage; Supports the hook,
a hook body approach/separation mechanism consisting of four mutually perpendicular rotation shafts rotatably supported by a first elevating frame so as to approach and separate the hook body;
The gusset folding mechanism includes a pair of first holders that are parallel to each other and installed upright, and a pair of first holders that are parallel to each other and are installed upright opposite to the first holders, and that are opposite to the first holders. a pair of second holders that move toward each other and move away from each other intersecting the direction in which the second holders approach and separate; and an approach/separation mechanism for relatively approaching and separating the first holding body, the second holding body, and the bending bodies, and the closing mechanism is configured to close the first lifting frame and the first lifting frame. A rotating body that is rotatably driven in conjunction with the elevation of the third lifting frame, which is arranged to be able to approach and separate from the second lifting frame, and a pair of gripping rods that are supported by the rotating body and move toward and away from each other. An opening closing device for a bag hung in a case, characterized by having a body and a bag.