JP5600075B2 - Packaging equipment - Google Patents

Description

  The present invention relates to a packaging apparatus that sandwiches an inserted product between resin films, and that is fed and cut at a rear end side thereof to continuously feed the product while conveying the resin film.

  In order to prevent the newspaper from getting wet during rainy weather delivery, it is a common practice to pack the newspaper part by part with a resin film (resin sheet) such as polyethylene in a newspaper store to improve waterproofness. As an apparatus for efficiently completing such a packaging operation in a short time, for example, a packaging apparatus described in Japanese Patent No. 4084708 and Japanese Patent Application Laid-Open No. 2007-223461 has a configuration as shown in FIG. Are known.

  In this packaging device, the product inserted into the insertion port 11 is fed while being sandwiched between the strip-shaped resin films supplied from the pair of roll bodies 100a and 100b, and the resin film on the rear end side of the product is welded and cut by the welding and cutting unit 30. The sheet is cut and sent to the downstream side by the conveying unit 40 formed by facing the roller conveyors 41 and 42, and the resin film on the upstream side of the welding and cutting unit 30 is pressed by the shutter plate 21 during the welding and cutting. In the tensioned state, welding and cutting work can be performed smoothly.

  However, if the article to be packaged is a delivery newspaper, for example, it will be packed in multiple cases for cases and companies / accommodation facilities that are packed with advertisements for New Years and packed several times thicker than usual. In the case of a case and the like packaged, the roller conveyors 41 and 42 are urged in the contact direction by springs 51 and 52 so that the articles do not slide down on the downward conveying path as shown in FIG. When the thick article 200 as described above enters, the leading end collides with the entrance portion of the closed conveying section 40, and the roller conveyors 41, 42 and the resin film, and between the resin film and the article 200 Each slip is gradually inserted into the conveying section 40 while causing slippage.

  In order to prevent the resin film from being displaced due to slippage when the transport unit 40 adds the product 200, a method of pressing the product 200 through the insertion port 11 is generally employed. However, this method of strongly pushing in is likely to fail even by a skilled person, and only a resin film is pulled in, so that it takes a long time to recover.

  Further, when an article 350 composed of a plurality of bundles is inserted as shown in the partially enlarged view of FIG. 12A, the roller conveyors 41 and 42 are moved while the upper bundle is displaced backward as shown in FIG. Since the front end side is deformed thinly and the total length of the article 350 is increased, the side surface is not packed cleanly or the upper resin film 350a is wasted. As a result, the number of packages per unit time is reduced and the productivity is lowered.

  In order to cope with such a problem, a packaging apparatus as shown in FIG. 13 has been provided in recent years. This adopts a method in which when the article 200 having a thickness of a predetermined level or more enters, the upstream side portion of the movable roller conveyor 41 is lifted by the power means such as the solenoid 90 and the inlet side of the transport unit 40 is opened. . However, this packaging apparatus has a problem that a new power means for opening the transport unit 40 needs to be added and the manufacturing cost increases.

Japanese Patent No. 4084708 Japanese Patent Laid-Open No. 2007-223641

  The present invention is intended to solve the above-described problems, and a packaging device that continuously wraps a predetermined product with a resin film automatically moves a transport unit as necessary without excessive cost increase. As an object to be opened, an object is to make it possible to easily realize a highly productive packaging operation.

  Therefore, the present invention is such that a conveyance path for an article to be packaged is formed between an insertion port and an outlet, and the inserted item is sandwiched from both sides by a belt-shaped resin film extending from a pair of roll bodies. A heater for welding by overlapping a portion of the surrounding resin film, and welding the resin film in the width direction on the rear end side of the product in the middle of the conveying path to cut at that position The plate is arranged so that it can move forward and backward, and the welding cutting part that is advanced to the welding position by the driving force of the motor, and the downstream side of the article sandwiched between the oppositely arranged along the conveyance path In a packaging device having a pair of roller conveyors that convey to a conveyor unit that is arranged so that the conveyance path can be opened and closed, the heater plate advances to a welding position by a motor that is connected via a link being driven to rotate forward. Do And at least one of the pair of roller conveyors is movable in the opening and closing direction of the conveying path and biased in the closing direction, and operates in the direction of opening the conveying portion by reverse rotation driving of the motor. When the article is inserted into the conveyance path in a predetermined situation, the motor is driven to rotate reversely, and the closed conveyance section opens at least the inlet side and accepts the leading end side of the article.

  In this way, as a power means for opening the transport section of the packaging device, a new power means is added by using the reverse rotation driving force of the heater plate driving motor that is not used except during welding cutting work. Therefore, it is possible to reliably open the transport unit when necessary while avoiding the cost increase.

  In this case, the welding and cutting portion is arranged such that a predetermined slide body moves forward and backward in a direction intersecting the transport direction of the transport path by the driving force of the motor. The heater plate is advanced to the welding position by the forward movement of the motor by the forward rotation drive, and the transport unit is pushed by abutting and pressing a part of the member attached to one of the roller conveyors by the backward movement of the reverse rotation drive of the motor. If the slide body is separated from the member during the moving operation, the welding / cutting operation of the heater plate is separated from the operation in the closing direction of the transfer unit, and the smooth movement is achieved. Easy welding and cutting work.

  In this case, a cam mechanism that is extended from the slide body in a direction crossing the conveying direction and a cam that rotates by a motor contacts or is connected to the distal end side of the cam rod that forms part of the link constitutes a cam mechanism. If the motor's forward / reverse rotational driving force is converted into the forward / backward reciprocating motion of the slide body via the cam mechanism, smooth opening and closing of the transport section can be achieved even with a relatively small torque motor. It becomes easy to realize the operation.

  Further, in the packaging apparatus described above, a shutter plate that is pivotally supported and biased in the closing direction so as to open and close the conveyance path with the tip side facing the downstream side is provided on the upstream side of the welding cut portion. The shutter plate is provided with a switch means that turns on the shutter plate when the inserted article passes through the opening, and the motor is turned on when the switch means is turned on. If it is characterized by opening the conveyance unit by reverse rotation driving, the simple and inexpensive detection means is used instead of the precise and expensive detection means such as an optical sensor for detecting a thick object. The opening operation can be performed automatically and reliably.

  According to the present invention, in which the transport unit is opened with a simple configuration that does not require a new power means, the transport unit is automatically opened as necessary without excessive cost increase, and a highly productive packaging The work can be easily realized.

The fragmentary longitudinal cross-section which shows the structure of the principal part of 1st Embodiment in this invention. (A), (B) is a fragmentary longitudinal cross-sectional view for demonstrating operation | movement of the packaging apparatus of FIG. (A), (B) is a fragmentary longitudinal cross-sectional view for demonstrating operation | movement of the packaging apparatus of FIG. 1 following FIG. The elements on larger scale which show the link structure of the slide member and motor side in the packaging apparatus of FIG. 1, and its operation | movement. The elements on larger scale which show the application example of the link structure of FIG. (A), (B), (C), (D) is a partial longitudinal cross-sectional view for demonstrating the structure and operation | movement of the principal part of 2nd Embodiment in this invention. The fragmentary longitudinal cross-section which shows the state of the shutter board | plate when the goods which are not thick are inserted in the packaging apparatus of FIG. The fragmentary longitudinal cross-section which shows the application example of the packaging apparatus of FIG. (A), (B) is a fragmentary longitudinal cross-section which shows the other application example of the packaging apparatus of FIG. The fragmentary longitudinal cross-section which shows the structure of the principal part in a prior art example. The elements on larger scale for demonstrating the detail and operation | movement of a conveyance part of the packaging apparatus of FIG. (A), (B) is the elements on larger scale for demonstrating operation | movement of the packaging apparatus of FIG. The fragmentary longitudinal cross-section which shows the structure of the principal part of another prior art example.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In addition, although the following packaging apparatuses have the function to weld also the resin film edge part side of the direction along the advancing direction of goods, since this component is the same as that of a prior art example, the description is abbreviate | omitted.

  FIG. 1 is a partial longitudinal sectional view showing a main part of the packaging apparatus according to the present embodiment, with a part omitted. This packaging device is supposed to be a newspaper for delivery as an article to be packaged, and is mainly used for packing with a resin film such as polyethylene for the purpose of improving the waterproofness of the newspaper. It can also be used for packaging other items such as packaging.

  The structure is such that an insertion port 11 extending in the depth direction of the drawing is opened on the upper surface of the apparatus, and a conveyance path 10 for an article is formed obliquely downward to a discharge port (not shown), and inserted into the conveyance path 10 from above. The part where the resin film around the product is overlapped while sandwiching the descending product with a strip-shaped resin film (resin sheet) extending in the center direction from a pair of rolls (not shown) arranged on the left and right sides of the upper part of the device It is designed to pack and pack the product by welding.

  In the middle of the conveying path 10 formed obliquely downward, the conveying path 10 is pivotally supported in the vicinity thereof and is urged in the closing direction by a spring (not shown) provided on the base end side so that the welding film The shutter plate 21A is arranged in a state where the front end side faces the downstream side while matching the width direction with the width direction.

  Immediately below the shutter plate 21A, a welded cutting portion 30A for wrapping goods is disposed. In this welding cut part 30A, a slide body 31 provided with a heater plate 31a for welding the resin film stacked on the rear end side of the inserted article linearly in the width direction and cutting at that position, A disc 50A that is driven to rotate forward and backward by a motor (not shown) and a shaft 47 connected to the disc 50A are arranged so as to reciprocately slide on a rail member 45 that is arranged to intersect the conveying direction. The cutting blade) moves forward and backward with respect to the sponge-like cushion material 32 disposed so as to face the conveyance path 10 and the resin film. The heater plate 31a is not provided on the slide body 31 as described above, but is arranged so as to advance and retreat separately at an intermediate position in the direction of movement of the slide body 31. The advancing operation may be performed by being pressed while abutting.

  Immediately downstream of the weld cutting unit 30A, a transport unit 40A in which roller-driven roller conveyors 41 and 42 are provided along the transport path 10 parallel to the transport rail 13 so that the transport surfaces face each other. Has been placed. The roller conveyors 41 and 42 are operated by a driving means (not shown) to perform a conveying operation and are controlled by a control device (not shown). Further, the upper roller conveyor 41 is provided in a state in which the upper roller conveyor 41 can be moved toward and away from the lower roller conveyor 42 and is biased in the proximity direction by a spring (not shown). Depending on the thickness, the roller conveyor 42 is sandwiched.

  In the present embodiment, sensors 70 and 71 are arranged at the position of the shutter plate 21A and the position of the weld cutting part 30A in the middle of the conveyance path 10, and the detection signal is shown by detecting the progress position of the inserted item. The electronic control device that outputs the signal to the electronic control device that does not perform the control performs various controls. Note that the above-described components are well known in common with the conventional example.

  In the present invention, the heater plate 31a advances in the welding direction by the forward rotation of the motor, and the transport unit 40A on the downstream side of the movable roller conveyor 41 moves toward the fixed roller conveyor 42. Although normally energized and closed, the upstream portion of the roller conveyor 41 is opened away from the roller conveyor 42 by the reverse rotation driving of the motor of the welding cutting unit 30A. In the situation, when the item is inserted into the conveyance path 10, the conveyance unit 40A, which has been closed by the reverse rotation of the motor, automatically opens the inlet side and accepts the leading end side of the item. Characterized by dots.

  In other words, the heater plate 31a is provided on the slide body 31 that reciprocally slides on the rail member 45 that is arranged so as to intersect the conveyance direction of the conveyance path 10, and is slid when the motor is driven in reverse rotation. The left side surface of the slide body 31 in the drawing is configured to contact and push the pin-shaped contact portion 400 projecting from the upstream portion of the cover body 41 a attached to the roller conveyor 41, and the upstream side of the roller conveyor 41. The part is separated from the roller conveyor 42 that has been in close contact with it, and the inlet side of the conveying unit 40A is opened to accept and hold the leading end side of an article thicker than usual.

  Therefore, in the packaging device of the present embodiment, when an article is inserted in a predetermined situation and the front end side has advanced to the transport unit 40A, the upstream side is automatically opened and smoothly received, thereby the resin film. It is possible to avoid unevenness of the product and the extension of the product in the transport direction, and it is possible to easily realize highly productive packaging work by minimizing the reduction of packaging quantity and waste of resin film while realizing clean packaging. It has become a thing.

  In addition, when the motor in which the heater plate 31a performs the forward operation is driven to rotate in the forward direction, the slide body 31 is separated from the contact portion 400 of the cover body 41a, so that the opening operation of the transport portion 40A is the operation in the direction of travel of the heater plate 31a. It is separated so that welding and cutting work can be performed smoothly.

  In addition, as a situation where the slide body 31 rotates the motor to the position where the roller conveyor 41 is separated and performs the operation corresponding to the thick material, it is inserted by manually operating the operation panel, the changeover switch or the like before starting the packaging. In addition, a detection means for detecting the situation set to operate for all the items or that the item inserted into the transport path 10 is not less than a predetermined thickness is arranged, and the electronic control unit operates the motor based on the detection result. When the setting is made to drive, a situation where an article having a predetermined thickness or more is inserted is assumed. Further, the disk 50A rotated by the motor may be a pulley.

  Next, details of the operation of the packaging device according to the present embodiment will be described with reference to FIGS. For example, when an article 200 such as a relatively thick newspaper is inserted (FIG. 2A), the tip of the article 200 is first brought into contact with the upstream side of the shutter plate 21A, and the tip is rotated so as to escape downstream. Then, it passes through the welding cut portion 30A while aligning the center portion of the tip surface with the tip side portion to which a resin film (not shown) is welded, and moves down the conveying path 10 together with the resin film.

  Then, the electronic control unit that detects the intrusion of the article 200 by the sensor 71 drives the motor to rotate in reverse to cause the slide body 31 to retreat via the disk 50A and the shaft 47, and this moves upstream of the cover body 41a of the roller conveyor 41. By abutting and pressing the arranged pin-shaped abutting portion 400, the upstream side portion of the conveying portion 40A is opened and the leading end side of the article 200 is received (FIG. 2B).

  The opening width of the conveyance unit 40A may be smaller than the thickness of the product 200 (for example, about half), and the leading end side of the product 200 enters the open gap to some extent. Since the side portion is lifted to open the entrance of the transport unit 40A, the article 200 is added to the transport unit 40A without shifting the resin film (FIG. 3A).

  Then, the product 200 moves downstream by the conveying operation, and the electronic control device detects that the rear end portion of the product 200 has passed through the shutter plate 21 </ b> A by the detection signal of the sensor 71 or the like, so that the product 200 is placed in the packaging position. Prior to or substantially simultaneously with stopping the conveying operation by the conveying unit 40A, the motor is driven to rotate in the forward direction to lower the heater plate 31a of the welding and cutting unit 30A to perform the resin film welding operation (FIG. 3 ( B)).

  By the way, in order to obtain a linear motion from the power means that is rotated by a motor or the like like the above-described slide body 31, the above-described link mechanism as shown in FIG. 4 is widely adopted. However, in this link mechanism, since the relationship between the rotation angle and the linear movement distance changes depending on the phase of the disk (rotating body) 50A, for example, a larger torque is required at the position C in the figure than at other positions. .

  Therefore, when the motor used in the welding cutting portion 30A of the packaging device has a torque limit, a cam 50B having a groove in a plan view involute curve or the like as shown in FIG. By using a predetermined cam mechanism, such as causing 31 to perform a linear reciprocating operation, the load on the motor can be greatly reduced by making the relationship between the rotation angle and the linear movement distance close to a proportional relationship, etc. Even a motor is easy to use as it is. Although not shown, as another means for advancing the heater plate in such a cam mechanism, the tip of the cam rod is brought into contact with the peripheral surface of the cam, and the heater plate is operated by overlapping the cam. It is also possible to provide another disk.

  FIG. 6 shows the configuration and operation of the main part of the second embodiment of the present invention. The embodiment described below is different from the method using active power means such as the heater plate driving motor as described above, and the tip of the product abuts on the upstream side of the welding cut portion. A shutter plate 21B is provided as a lever member that is formed with the contact surface 21a inclined with respect to the transport direction with the front end facing downstream, and is pivotally supported at a predetermined position. It is characterized in that it uses passive power when the shutter plate 21B is pushed open.

  This is because, when an article having a thickness greater than or equal to a predetermined thickness is inserted, the shutter plate 21B is slid while the tip of the article comes into contact with and slides on the contact surface 21a that normally closes the predetermined range of the transport path 10. The movable roller conveyor 41 that is connected to or integrated with the predetermined portion is lifted up by the predetermined opening, and the closed conveying portion opens at least the upstream portion and accepts the leading end side of the article. .

  That is, as shown in FIG. 6 (A), the shutter plate 21B arranged for the purpose of holding the resin film on the upstream side of the welding cut portion has a lever portion 21b protruding in the transport direction on the downstream side portion. It is formed, and this opens the cover body 41b attached to the movable roller conveyor 41 at the upstream portion extending in the direction of the shutter plate 21B, and the opening portion opens the contact portion 410 side. It comes into contact with and pushes.

  Further, the upstream side surface of the shutter plate 21B is formed as an abutting surface 21a that is inclined with respect to the conveying direction with the front end side facing the downstream side, and is in contact with the front end portion of the product, as shown in FIG. 6B. When the article 200 thicker than usual comes into contact with and pushes the shutter plate 21B apart, the lever part 21b lifts up while contacting the contact part 410 of the cover body 41b, and the roller as shown in FIG. The conveyor 41 is lifted to open the entrance side of the transport unit 40B.

  Then, the article 200 is further opened as the conveying section 40B is opened to some extent and the leading end is held in, and the article 200 enters the conveying section 40B (FIG. 6D). In this way, by using the force that the product 200 pushes the shutter plate 21B, the transport unit 40B can be reliably opened without using power means such as a motor.

  On the other hand, as shown in FIG. 7, when a normal product 300 that is not thick is inserted and passes through the shutter plate 21 </ b> B, the tip of the contact surface 21 a and the sponge 32 are not lifted so as not to lift the roller conveyor 41. Since a gap (allo-once) is provided between the lever portion 21b and the contact surface 410, it is possible to avoid a situation in which the transport portion 40B is opened although it is not necessary.

  As described above, according to the present embodiment, since the opening / closing and the opening degree of the conveying unit 40B are automatically determined and executed according to the opening degree of the contact surface 21a when the article passes, the conveying unit In addition to not using active power means to open 40B, it does not require sophisticated control procedures with expensive sensors or electronic control to detect the thickness of the item.

  In addition, as an application example, when a product 200 is pushed in by adding a force increasing mechanism using a lever member 22 as shown in FIG. 8 to a normal shutter plate 21A instead of the shutter plate 21B shown in FIG. Since it becomes possible to reduce resistance, the conveyance part 40B can be easily opened even if the article 200 is relatively soft and has no stiffness.

  Furthermore, as another application example, as shown in FIG. 9A, instead of the cover body 41a attached to the movable roller conveyor 41 in the embodiment according to FIG. A cover body 41c having a contact surface 411 that extends to the upstream side and has a tip-like hook shape and the same function as the shutter plate 21B described above is disposed, and the inserted item contacts the contact surface 411. Even if the function as a lever member is exhibited as a whole by contacting and pushing open, the movable roller conveyor 41 can be reliably opened.

  According to this application example, the distance between the fulcrum and the force point becomes long, and the product can easily exert the force to open the conveying section 40C even if the hardness of the product is not sufficient, and the resin film adheres to the tip side of the product. Since the contact is made at the position before the operation, the resin film is not displaced or biased, and it is difficult to adversely affect the finished packaging. Even in this case, it is recommended that a gap for allowing a normal product that is not a thick material to pass through be formed on the tip side of the contact surface 411.

  On the other hand, in this application example, the cover body 41c as a lever member has a shape that is directly connected to the conveyance unit 40C side, so that the part side having the contact surface 411 that can be seen from the insertion port is unintentionally swung as the product is conveyed. It will be easy to do. Therefore, as shown in FIG. 9B, the lever member 44, which is a separate part separated from the transport portion 40D, is connected to the contact portion 420 of the cover body 41d between the fulcrum (shaft portion) and the force point. If this is done, the operation can be separated except during the opening operation of the transport section 40D, and it can be assumed that the transport operation of the article is not affected.

  As described above, with respect to a packaging device that continuously wraps a predetermined product with a resin film, the present invention is highly productive, as it opens the transport unit as needed without excessive cost increase. Packaging work can now be realized easily.

  DESCRIPTION OF SYMBOLS 10 Conveyance path, 11 Insertion slot, 21A, 21B Shutter plate, 21a, 411, 440 Contact surface, 21b Lever part, 22, 44 Lever member, 30A Weld cutting part, 31 Slide body, 31a Heater plate, 40A, 40B, 40C, 40D Conveying part, 41, 42 Roller conveyor, 41a, 41b, 41c Cover member, 45 Slide member, 200, 300, 350 Product, 400, 410, 420 Contact part

Claims (4)

A transport path for the product to be packaged is formed between the insertion port and the discharge port, and the resin film around the product is sandwiched from both sides by a belt-shaped resin film extending from a pair of rolls. A heater plate for performing packaging by welding the overlapped portions, and for welding the resin film in the width direction on the rear end side of the product in the middle of the transport path and cutting the welded film at the welding position Is disposed so as to be capable of advancing and retracting and is advanced to the welding position by the driving force of the motor, and is disposed oppositely along the conveyance path on the downstream side of the welding and cutting part and sandwiched therebetween. In a packaging device comprising a transport unit in which a pair of roller conveyors for transporting the goods downstream is arranged to be able to open and close the transport path,
The heater plate is moved to the welding position when the motor connected through a link is driven to rotate in the forward direction, and at least one of the pair of roller conveyors is movable in the opening / closing direction of the conveying path and closed. And the motor is operated in the direction to open the conveying portion by reverse rotation driving of the motor, and the motor is driven in reverse rotation when the article is inserted into the conveying path in a predetermined situation. The packaging device is characterized in that the conveying section that has been closed opens at least the inlet side to receive the leading end side of the item.   A predetermined slide body is arranged at the welding and cutting portion so as to advance and retract in a direction intersecting the transport direction of the transport path by the driving force of the motor, and the slide body is rotated forward by the motor. The heater plate is advanced to the welding position by advancing operation by driving, and the conveying portion is moved by abutting and pressing a part of a member attached to the one roller conveyor by a retreating operation by reverse rotation driving of the motor. The packaging apparatus according to claim 1, wherein the slide body is opened and the slide body is separated from the member during the moving operation.   A cam that is rotated by the motor contacts or is connected to the distal end side of a cam rod that extends from the slide body in a direction crossing the transport direction and forms a part of the link, thereby forming a cam mechanism. The packaging apparatus according to claim 2, wherein a forward / reverse rotational driving force of the motor is converted into an advancing / retreating motion of the slide body via the cam mechanism.   On the upstream side of the welding cut portion, a shutter plate that is pivotally supported so as to open and close the conveyance path with the front end side facing the downstream side and biased in the closing direction is provided. In addition, there is provided a switch means that is turned on at an opening of a predetermined angle or more when the inserted article passes through the opening, and when the switch means is turned on, the motor is driven in reverse rotation to carry the transport. The packaging apparatus according to claim 1, 2, or 3, wherein the part is opened.

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