JP2016169017A - Bag opening device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress bulkiness of a folded empty bag due to restoring force, and improve efficiency of folding work of the empty bag.SOLUTION: A bag opening device 1 cuts a granular material encapsulating bag F charged into a bag opening processing part 3 inside a housing 2 by a cutter 4, bends an empty bag G, from which the granular material is taken out, while pushing in the empty bag toward a pair of adjacently arranged rotatable rollers 5A, 5B by a pusher 6, and discharges the empty bag G while sandwiching the empty bag with the pair of rollers 5A, 5B. The pusher 6 is arranged to face the pair of rollers 5A, 5B, and has a boring tool 7 at a tip part of the pusher 6 on the side facing the rollers 5A, 5B. The boring tool 7 can advance and retreat relative to a gap region 8 of the rollers 5A, 5B.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a bag opening device that opens a bag enclosing a powder and folds an empty bag after the powder is taken out.

  In the automatic bag opening device described in Patent Documents 1 and 2, when various powders filled in the bag are released, the bag pushing plate folds the empty bag in half, and the gap portion between the upper and lower folding rollers An empty bag folding mechanism is used that pushes in and ejects with a roller.

JP-A-8-258820 JP 2002-145220 A

  However, the bags are made of strong paper, etc. Even if the bags are folded by pressing them from above and below with a roller, they are not folded in exactly two, but are discharged in a slightly opened state, and the shape of the empty bag is restored. Since it expands to return to its original shape with force, there is a problem that the empty bag is bulky and a burden is imposed on the folding work.

  Accordingly, an object of the present invention is to provide a bag opening device that can suppress bulkiness due to the restoring force of a folded empty bag and contributes to the efficiency of empty bag folding work.

  According to the present invention, a powder-encapsulated bag put into a bag-opening treatment chamber inside a housing is cut with a cutter, and an empty bag after the powder is taken out is paired with a pair of rotatable rollers arranged in proximity. In the bag opening device that bends while pushing with a pusher and discharges while sandwiching an empty bag with the pair of rollers, the pusher is disposed to face the pair of rollers, and includes a punching tool at the tip of the pusher, It is a bag opening device characterized by punching and folding a slit in the lateral direction of the empty bag by allowing the punch to advance and retreat with respect to the gap area of the roller.

  It is preferable that the punch is a plate-like member and the tip is formed sharply.

  It is preferable that the tip of the punch is cut out intermittently.

  It is preferable that the roller includes a gear portion and a roller portion of an elastic member. In this case, it is preferable that the end portion facing the gear portion is intermittently cut out.

  ADVANTAGE OF THE INVENTION According to this invention, the bulkiness by the restoring force of the folded empty bag can be suppressed, it can contribute to efficiency improvement of the empty bag folding work, and industrial utility value is very large.

It is a top view which shows the external appearance of the pusher of the bag opening apparatus of this invention embodiment. (A) The front view of the roller of the bag opening apparatus of this invention embodiment, (b) is a side view similarly. (A) is a top view of the punching tool of embodiment of this invention, (b) is a front view similarly. (A) and (b) are the expanded side views of the front-end | tip of the punching tool of embodiment of this invention. It is a side view of the structure containing the pusher and roller of the bag opening apparatus of this invention embodiment. (A) is explanatory drawing which shows a mode that the bag was carried in to the bag opening process part, (b) is explanatory drawing which shows a mode that it cut | disconnects with a punch after the bag stood up and suspended. (A) is explanatory drawing which shows a mode that a granular material is discharged | emitted from a bag, (b) is explanatory drawing which shows a mode that an empty bag is sent out with a roller. It is explanatory drawing which shows a mode that an empty bag is wound around a roller and advances. It is explanatory drawing which shows a mode that an empty bag is discharged | emitted from a roller. It is explanatory drawing which shows a mode immediately after an empty bag is discharged | emitted from the roller outside. It is a front view of the state by which the empty bag discharged | emitted from the bag opening apparatus was expand | deployed. (A)-(c) is a top view which shows the modification of a punch.

  Hereinafter, the bag opening apparatus 1 of embodiment of this invention is demonstrated with reference to drawings. The bag opening device 1 shown in FIGS. 1 to 9 cuts the granular material enclosing bag F put into the bag opening processing unit 3 inside the housing 2 with a cutter 4 and is empty after the granular material is taken out. In the bag opening device that pushes the bag G toward the pair of rotatable rollers 5A and 5B arranged in proximity to each other and pushes it with the pusher 6, and discharges the bag G while sandwiching the empty bag G between the pair of rollers 5A and 5B. Is disposed opposite to the pair of rollers 5A and 5B, and includes a punching tool 7 at the tip of the pusher 6 on the side facing the rollers 5A and 5B. It is possible to advance and retreat. Here, as an example, the bag opening device 1 is provided with an automatic bag opening function by microcomputer control. Hereinafter, each element will be described in detail.

  When the cutter 4 of the bag opening device 1 is driven in the lateral direction, the cut C is made in the bag F in which the granular material is enclosed. Thereby, the powder body is taken out from the bag F and the empty bag G is folded. The details of the configuration for taking out the powder particles will be described later, and the configuration for folding the empty bag G will be described below.

  As shown in FIG. 2, the roller 5 </ b> A includes a gear portion 5 a and a roller portion 5 b of an elastic member (for example, elastic resin, rubber, etc.). Similarly, the roller 5A includes a gear portion 5c and a roller portion 5d of an elastic member (for example, an elastic resin such as urethane or rubber). The pair of rollers 5A and 5B face each other in the vertical direction, the gear portions 5a and 5c mesh, the roller portions 5b and 5d are joined, and the empty bag G is conveyed. If the roller is made of only an elastic resin, the empty bag G may slip and not be discharged by the granular material adhering to the roller, so that the empty bag G can be forcibly conveyed by the gear portions 5a and 5c. The rollers 5A and 5B include rotating shafts 5M and 5N arranged in parallel. The rollers 5A and 5B are fixed to a rotating shaft and rotate integrally. Thus, by combining the gear portions 5a and 5c and the roller portions 5b and 5d, which are elastic and rigid rotating members, the empty bag G is more reliably conveyed and the empty bag G is prevented from being clogged.

  As shown in FIG. 1, the pusher 6 includes an air or hydraulic cylinder 6 a and a plurality of rods 6 b to 6 d. The cylinder 6 a is fixed inside the housing 2. The plurality of rods 6b to 6d are supported by bearings 6e, 6f and the like, and can advance and retreat.

  As shown in FIGS. 3 and 4, the punching tool 7 is provided for punching the perforation M shown in FIG. 11 in the empty bag G and folding it. This punch 7 has a long shape including a horizontal plate 7a, a vertical plate 7b, and a connecting portion 7c. The punching tool 7 is preferably a member having rigidity and strength, and here, a metal plate (an iron plate, a stainless steel plate and the like can be illustrated) can be illustrated, and the gear portions 5a and 5c are illustrated as shown in FIGS. The tip that faces is sharp. The degree of sharpness only needs to be able to perforate the empty bag G. If the thickness of the punch 7 is too thin, there is a problem of strength, and if it is too thick, it becomes heavy, so it is set to an appropriate thickness, for example, 1 to 4 mm. The empty bag G can be pushed in from a meshing center of the rollers 5A and 5B to a predetermined distance before (for example, 5 mm before). If the tip of the punch 7 is too close to the rollers 5A and 5B, there is a risk of buffering.

  The plate-like end portion of the punching tool 7 facing the gear portion 5a is intermittently cut out, and the convex portions 7d and the concave portions 7e are alternately formed. By providing the concave portions 7e, the empty bag G is not completely cut. In this manner, as shown in FIG. 11, a broken line perforation M composed of a plurality of slits can be put in the empty bag G. The shape of the convex portion 7d and the concave portion 7e can be set as appropriate, and for example, a saw blade shape, a triangular shape, a trapezoidal shape, a chevron shape, etc. can be adopted as appropriate. The punching tool 7 is provided with a through hole 7f so that the granular material does not accumulate on the upper surface. A through hole 7g to be attached is provided.

  A recess 7e is provided in the punching tool 7 at a position corresponding to the gear portions 5a and 5c so that the punching tool 7 does not hit the gear portions 5a and 5c.

  The perforation M makes it easy to fold the empty bag G, and the folds of the empty bag G overlap exactly, reducing the restoring force of the empty bag G and suppressing the spreading action. Thereby, the empty bag G is not bulky, and the processing operation of the empty bag G is simplified.

  The gap region 8 is a region where the empty bag G passes between the rollers 5 </ b> A and 5 </ b> B, and the punching tool 7 advances and retreats toward the gap region 8.

  As shown in FIGS. 12A to 12C, the shape of the blades of the punching tools 7 ′, 7 ″, and 7 ′ ″ is a saw blade, a trapezoidal blade, and a triangular blade, respectively. Can be adopted.

  About the structure in the bag opening apparatus 1, and a bag opening process mechanism, it is generally the Unexamined-Japanese-Patent No. 4-6919 (patent 2669746), Unexamined-Japanese-Patent No. 8-258820, Unexamined-Japanese-Patent No. 2000-72119, Unexamined-Japanese-Patent No. 2000-72119. Since it is as having disclosed in 2002-145223 gazette etc., it demonstrates simply.

  The internal structure of the bag opening device 1 will be described below. As shown in FIG. 6, a chute is formed inside the bag opening device 1 by an inclined surface 22 inclined downward from the charging port 21 and a vertical surface 24 extending vertically downward to the discharge port 23. On the inclined surface 22 of the chute, a bag upright plate 27 and a holding plate 28 that can stand upright by detecting the load of the bag F are attached, and a cutter 4 that is driven in a timely manner is accommodated in the chute. Below the cutter 4, the bag upright plate 27 is parallel to the vertical surface 24 of the chute when the upright plate 27 is not upright, and for a certain period of time as the bag upright plate 27 stands up, that is, with respect to the vertical surface 24. And a receiving plate 29 that is orthogonal to each other. Four pipe holes are formed in the vertical surface 31 opposed to the inclined surface 22, and a plurality of bag insertion pipes 34 advance and retract horizontally at predetermined intervals. A discharge port 32 is formed between the vertical surface 31 and the lower vertical surface 33 (see FIGS. 5, 8, and 9). Rollers 5 </ b> A and 5 </ b> B are arranged near the empty bag outlet 25 side of the discharge port 32. The bag insertion pipe 34 penetrates the upper part of the bag F and is suspended in the air. The tip of the bag insertion pipe 34 has a sharp shape, and the root is connected to a pipe 36 for introducing compressed air. A pair of rollers 5 </ b> A and 5 </ b> B that rotate reversely with each other are provided below, and an empty bag outlet 25 is formed on the outside thereof.

  Next, the flow of the bag F opening process and the empty bag G folding process will be described. As shown by a two-dot chain line in FIG. 6A, the bag F put into the bag opening device 1 falls along the vertical surface 24 of the chute, and is held up by the bag standing plate 27 and the receiving plate 29. Is done. As shown by the arrow in FIG. 6B, the bag insertion tube 34 that moves forward is inserted into the upper portion of the bag F that has been raised, and the bag F is suspended. Thereafter, as shown in FIG. 7A, the cutter 4 operates, and as shown in FIG. The receiving plate 29 is rotated to be in a vertical state parallel to the vertical surface 24 of the chute, and the bag F is suspended by the stabbed bag insertion tube 34, and the lower end is not supported by the receiving plate 29. Pulse air is introduced into the bag insertion tube 34 and sprayed at the tip to fluidize the granular material in the bag, as shown by the arrow at the bottom of FIG. Granules are discharged to the discharge port 23 by their own weight.

  When the discharging operation of the powder and granule is finished, the process moves to the folding process of the empty bag G. First, as shown by the arrow in FIG. 7A, the empty bag G after discharging the granular material is detached from the bag insertion tube 34 when the bag insertion tube 34 is drawn into the vertical surface 31, The bag upright 27 is retracted to the original position. Further, as shown in FIG. 7B, the pusher 6 is driven, the punching tool 7 advances toward the gap region 8, and the folding process is started by pushing the empty bag G toward the rollers 5A and 5B. To do. In addition, 29 prepares for the next bag opening and the receiving plate 29 moves to a horizontal position.

  When the punch 7 is folded while pushing the empty bag G toward the rollers 5A and 5B, the sharp convex portion 7d of the punch 7 hits the empty bag G, and the pusher 6 pushes the empty bag G as shown in FIG. A perforation M is formed in the lateral direction in the central region of the bag G. The driving timing of the rollers 5A and 5B and the timing of advancement / retraction of the punching tool 7 are set as appropriate.

  As shown in FIG. 8, when the punching tool 7 is pushed to the vicinity of the gap area 8 between the roller portions 5b and 5d, the empty bag G starts to be wound by the pair of upper and lower rollers 5A and 5B. As shown in FIG. 10, the empty bag G is further conveyed by the rollers 5A and 5B toward the empty bag outlet 25, and as shown in FIG. 10, the empty bag G is discharged to the empty bag outlet 25 by the rotation of the rollers 5A and 5B. Is done. The pusher 6 retracts inside the vertical surface 24 and prepares for opening the next bag F. The holding plate 28 holds the bag F.

  With the above configuration. Since the perforation 7 forms a perforation M in the empty bag G and folds it by pressing it from the top and bottom with the rollers 5A and 5B, it is folded in exactly two folds and discharged in a tightly folded state. This prevents the return to the original shape, and the empty bag is not bulky.

  The present invention is not limited to the above-described embodiment, and improvements, changes, additions, and the like can be added without departing from the technical idea of the present invention. Such modifications and equivalents are also included in the technical scope of the present invention. For example, the gear portions 5a and 5c may be eliminated and only the roller portions 5b and 5d may be configured.

DESCRIPTION OF SYMBOLS 1 ... Bag opening apparatus 2 ... Housing | casing 3 ... Bag opening process part 4 ... Cutter 5A, 5B ... Roller 5a, 5c ... Gear part 5b, 5d ... Roller part 5M , 5N ... rotating shaft 6 ... pusher 6a ... cylinder 6b, 6c, 6d ... rod 6e, 6f ... bearing 7 ... punch 7a ... horizontal plate 7b ... vertical Plate 7c ... Connecting part 7d ... Convex part 7e ... Concave part 7f ... Through hole 7g ... Through hole 8 ... Gap area 21 ... Input port 22 ... Inclined surface 23 .. discharge port 24 ... vertical surface 25 ... empty bag outlet 27 ... bag upright plate 28 ... holding plate 29 ... receiving plates 31, 33 ... vertical surface 32 ... discharge port 34 ... Bag insertion tube 36 ... Pipe F ... Bag G ... Empty bag

Claims (4)

Cut the powder encapsulated bag put into the bag opening processing chamber inside the housing with a cutter, and push the empty bag after the powder is taken out toward a pair of rotatable rollers arranged in close proximity. In the bag opening device that folds while pushing in, and discharges while sandwiching an empty bag with the pair of rollers,
The pusher is disposed opposite to the pair of rollers,
A bag opening device comprising a punching tool at a tip of the pusher, wherein the punching tool is capable of advancing and retreating with respect to a gap area of the roller, thereby punching and folding a slit in a lateral direction of the empty bag. .   The bag opening device according to claim 1, wherein the punching tool is a plate-like member, and the tip is sharply formed.   The bag opening apparatus of Claim 1 or 2 which cut off the front-end | tip of the said piercing tool intermittently.   The bag opening device according to any one of claims 1 to 3, wherein the roller includes a gear portion and a roller portion of an elastic member.

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