JPH0622951B2 - Device for inserting bag into case - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically and closely inserting a bag into a cardboard case or the like.

2. Description of the Related Art When storing articles in a cardboard case, a wooden box, etc., a bag made of plastic or the like is inserted along the inner wall of the case, and then the articles are stored in the bag and packaged. In this case, the bag is inserted by the operator's manual work, and the work efficiency is extremely poor.

In order to remedy this defect, it is known to insert the core metal of the box form into the opened bag to expand the bag and insert it into the case, as disclosed in JP-A-55-9844. .

However, in such a method, the height of the apparatus itself is increased because the core metal of the box form must be inserted, and when the lower part of the box form is aligned with the bottom of the case, the bag is torn, so It is difficult to closely contact the corners, and the core metal of the box form must be replaced each time depending on the size of the case, which makes the configuration and handling extremely complicated.

Also, when the expandable bag holding device is in the contracted state, manually insert the bag and then lower the holding device into the case to open the holding device in order and close the inner wall surface of the case to the bag. It is known from Japanese Patent Laid-Open No. 51-111185, but there is a problem in that the bag cannot be automatically installed in the case and it is difficult to quickly and easily deal with changing the size of the case. is there.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In view of these circumstances, the present invention allows the bag to be automatically expanded and inserted along the inner wall surface of the case in a close contact manner and easily adjusted depending on the size of the case. Then, it is made to be able to cope with this.

Means for Solving the Problems The first aspect of the present invention is a means for achieving the above-mentioned object. The first aspect of the present invention is to lift and lower a bag that holds a bag above a lifter for mounting a case whose upper part is open. The gripper is provided, and a suction pad for expanding the bag mouth to the left and right is provided at the lower position of the gripper, and a pair of arms for outwardly rotating and expanding is provided on the upper portion of the lifter so as to face each other. A bag expansion molding device is installed so that the tip of the mold arm can be moved up and down so that it reaches the bottom surface inside the case, and its rotational expansion position is located inside the corner of the case, and further outward on the upper part of the lifter. Secondly, a bag opening device provided with a pair of rotationally expandable mold arms facing each other on the left and right is formed so as to be vertically movable and the expanded position of the mold arms is located outside the case. The second invention is a case with an open top. An elevator gripper that holds and conveys the bag is provided above the lifter on which the bag is placed, and a suction pad that expands the bag mouth to the left and right is provided at the lower position of the gripper. A pair of mold arms, whose rotation range is adjustable toward one side, move to the left and right so that the bag expansion molding device can be adjusted so that it can be moved up and down so that the tip of the mold arm reaches the bottom of the case. A bag opening that is installed so that the expansion position is located inside the corner of the case, and a pair of mold arms that can adjust the rotation range to the outside on the upper part of the lifter are provided so that they can be moved left and right to oppose each other. The gist of the present invention is that the device is formed so that it can be moved up and down and the expansion position of the mold arm is located outside the case. In particular, the bag expansion molding device and the bag opening device are opposed to each other by a pair of mold arms. Rotating range of die arm and die arm By freely regulating the lifting amount, it is possible to easily correspond to the magnitude of the case.

Embodiment An embodiment of the present invention will be described with reference to the drawings. Above the liftable lifter 1 on which a cardboard case A having an upper flap A'folded outward is placed, a bag B from an appropriate position.
A gripper 2.2 for sandwiching and transporting the upper part of the gripper is provided by a transport chain 3.3 so that the gripper 2.2 can move up and down.
A pair of suction pads facing each other at the descending position of
4 is provided so that it can be brought into and out of contact with the transfer chains 5, 5, etc., and when the bag B sandwiched by the grippers 2, 2 is conveyed to the lowered position, the suction pad 4 is attached to the bag B in a suspended state above the case A.・ 4, 4 and 4 are joined to adsorb the mouth edge of the bag, and at the same time, the gripper 2.2 releases the holding action, and then the suction pads 4, 4, 4 and 4 open the mouth of the bag B into the case A. It is formed so as to widen to the left and right as shown in FIG.

Further, a pair of frames 7 and 7 are provided on both upper sides of the lifter 1 so as to be movable left and right by an adjusting screw rod 6 so as to be opposed to each other. An upper slide block 9 and a lower slide block 10 are provided on the pair of sliding rods 8 and 8 so as to be vertically movable by appropriate mechanisms.
Is provided with a bag expanding and forming device 14 formed by arranging a pair of mold arms 11 and 11 facing each other on the left and right. The pair of mold arms 11 and 11 are respectively linked to an upper rotary cylinder 13 by an upper link mechanism 13 '. And a bag opening device 16 formed by arranging a pair of mold arms 12 and 12 so as to oppose each other on the lower sliding block 10. The pair of mold arms 12 and 12 are connected to the lower rotary cylinder 15 by a lower link mechanism 15 'so as to rotate and expand outward.

Therefore, the upper sliding block 9 of the bag expanding and forming device 14 slides downward in the rotational expanding range of the pair of mold arms 11, 11, 12 and 12 of the bag expanding and forming device 14 and the bag opening device 16. When the tips of the arms 11, 11, 11 are lowered to the inner bottom of the case A lifted by the lifter 1, the rotary cylinder 13 is actuated to open the die arm 11, 11, and the expanded position is the case. When the lower slide block 10 of the bag opening device 16 slides downward, the mold arms 12 and 12 descend to the mouth portion of the bag B, and then the rotary cylinder. 15, the mold arms 12 and 12 are rotated outward to adjust the opening of the bag B so that it can be opened outward more than the opening of the case A.

When the size of the case A is changed, the adjustment screw 6 is used to move and adjust the frames 7 and 7 to the left and right, and the mold cylinder 11 and 15 are rotated by the rotary cylinders 13 and 15. The rotation range of 11, 12 and 12 is also adjusted, and further, the lowering amount of the vertical sliding blocks 9 and 10 is adjusted to adjust the lowering position of the die arms 11 and 12.

Cases A are provided on the four sides below the suction pad 4.
A flap guide 17 for restraining the flap A'folded outward at the upper end is provided so as to be extendable and the frame 7 ・ 7
Strippers 18,18,18,18, which can be expanded and slid up and down, are respectively provided on both sides of the arm so that they can be slid down by being fitted to the arms 12,12,12,12 in the expanded position. Is configured.

In the figure, reference numeral 19 is an adjusting and turning handle of the adjusting screw rod 6, and 20 is a machine frame.

Action Since the embodiment of the present invention is configured as described above, when the grippers 2.2 holding the bag B are lowered and their lips come to the positions of the suction pads 4, 4, 4, 4, suction is performed. Pad 4
・ 4, 4 and 4 operate to adsorb the bag and open the bag mouth to the left and right. (See FIGS. 9A to 9B) Then, after the bag opening device 16 slides downward, the arms 12 and 12 thereof respectively expand to open the bag mouth in a rectangular shape larger than the opening of the case A. (See FIG. 9C) Next, the lifter 1 lifts the case A and at the same time, the flap guide 1
7.17.17.17 are extended to suppress the flap A'of the case A, and the lower edge of the bag B is inserted into the case A while the edge of the bag B is bent by the edge of the case A. It (See FIG. 9 (d) and (f)) Then, after the bag expanding and forming device 14 slides downward, the pair of mold arms 11 and 11 respectively rotate outward to expand and expand to the corners of the case A. The bag B is formed so as to extend along the inner wall surface of the case, and the stripper 18 is further fitted into the arms 12 that are descending and expanding to compress the rim of the bag B downward to form the bag B in the case. It's all about A. (See FIG. 9 (e) and (g)) When the bag B has been hung up in this manner, the flap guide 17 retracts to release the restraint of the flap A ′ and the stripper 18
Then the arms 11 and 11 of the bag expansion molding device 14
Is closed and lifted up, and further the lifter 1 is lowered to carry the case A downward, and then the arms 12 of the bag opening device 16 are lifted up and closed.

Although the flap is bent in this embodiment, it can be applied to the upright state.

EFFECTS OF THE INVENTION The present invention has a bag sandwiched by grippers above a case placed on a lifter, and is arranged on the left and right sides of a pair of mold arms that expand along the inner wall surface of the case. The bag expands and closes along the inner wall of the case by the raising and lowering action of the bag expanding and forming device and the bag opening device that is arranged opposite to each other and is composed of a pair of mold arms that bends and holds the mouth of the bag larger than the case mouth. It is possible to smoothly and surely perform expansion molding and continuously and automatically insert the bag into the case.

Further, according to the present invention, the size of the case is adjusted by adjusting the left and right facing distances of the pair of mold arms of the bag expanding and forming device and the bag opening device, the up and down positions of the mold arms, and the rotating and expanding amount of the pair of mold arms. The bag expansion molding device and bag opening device work in conjunction with the vertical movement of the lifter to allow a wide adjustment range even when the height (depth) of the case is changed. . Therefore, there is an excellent feature that the height of the device does not become higher than in the conventional case and the entire device can be made compact.

[Brief description of drawings]

FIG. 1 is a plan view of the present invention, FIG. 2 is a front view, FIG. 3 is a side view, FIG. 4 is a front view of a bag expansion molding device and a bag opening device, and FIG. A plan view, FIG. 6 is a partially cutaway side view of the bag expanding and forming apparatus, FIG. 7 is a plan view showing an operating state of the bag opening apparatus, FIG. 8 is a cutaway side view of the same portion, and FIG. FIG. 8 is an explanatory diagram showing the operation sequence of the present invention. 1 ... Lifter, 2 ... Gripper, 4 ... Suction pad, 11.12 ... Mold arm, 14 ... Bag expansion molding device, 16 ... Bag opening device, A ... Case, B ... Bag.

Claims (2)

[Claims] 1. A liftable gripper for sandwiching and transporting a bag is provided above a lifter for mounting a case having an open upper part, and a suction pad for expanding the bag mouth to the left and right is provided at the lowered position of the gripper. Further, a bag expanding and forming device provided with a pair of mold arms, which are provided on the upper part of the lifter and pivotally expands outward, facing left and right, is movable up and down so that the tip of the mold arm reaches the bottom surface of the case. A bag opening device is provided in which the rotational expansion position is located inside the corner of the case, and further, a pair of mold arms that are outwardly rotatable and expandable are provided on the upper part of the lifter so as to oppose each other on the left and right. A device for inserting a bag into a case, characterized in that it is formed so that it can be moved up and down and the expanded position of the mold arm is located outside the case. 2. A suction pad for opening and lowering a bag mouth to the left and right at the lower position of the gripper, which is provided above a lifter on which a case having an open top is placed and which holds and conveys the bag. In addition, a bag expansion molding device equipped with a pair of mold arms with adjustable turning range outwardly on the upper part of the lifter and facing the left and right is adjustable. Provided so that it can be raised and lowered so as to reach it, and its pivotal expansion position is located inside the corner of the case, and a pair of mold arms that are adjustable in the outward pivot range on the upper part of the lifter oppose left and right. A device for inserting a case into a bag, characterized in that a bag opening device that is movable and adjustable is formed so that it can be moved up and down and the expanded position of the die arm is located outside the case.