JP2006117324A - Film packaging machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film packaging machine which can perform the packaging of a film certainly smoothly to variations, such as the quality of the material of a film and the diameter of a film roll. <P>SOLUTION: A film feeder 80 rotatably supports the pivot of a retainer 82 provided with an engagement portion 84 and a holder 85 on the side-wall portion of one side in containing space 81 for containing the film roll 15, while providing an electro-magnetic brake 88 which brakes the retainer 82, by supporting a bearing stand 93 which supports the pivot of a clamp 83 on the side-wall portion of the other side in the containing space 81 by oscillating axis 95 with oscillations free, by enabling the clamp 83 to switch freely in two positions with the engagement position with the core tube 15a of the film roll and the evacuation position evacuated from the containing space 81 to the side, by projecting within the containing space 81 when the clamp 83 is in the evacuation position, by being pushingly pressed by the end portion of the film roll 15, and by firmly installing a switch driving plate 96 which changes over the clamp 83 to the engagement position to the bearing stand 93 in the film packaging machine. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a packaging machine for packaging a sheet-like or sheet-bundled article such as a newspaper with a plastic film.

This type of packaging machine is used, for example, to wrap a newspaper delivered on a rainy day in a newspaper store with a plastic film such as a polyethylene sheet, and to prevent wetness due to rain. For example, those disclosed in Japanese Patent Application Laid-Open No. 8-143010 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2001-171607 (Patent Document 2) are available.
JP-A-8-143010 JP 2001-171607 A

  In the above packaging machine, as shown in FIG. 21, an article to be packaged P is inserted between the films F and F with the tip k welded to each other, and the inserted product is conveyed to a predetermined position by a conveying device. The left and right sides are welded as indicated by a welding line m, and the rear end of the film is welded as indicated by a welding line n, and then the package P is moved to the front indicated by the arrow together with the film to be welded line n part. And is conveyed forward as a packaged product.

  And as shown in FIG. 3 of the said patent document 2, the welding of the right-and-left both sides of said film is a blade base with an upper surface located in the conveyance surface (conveyance path PTH) of the to-be-packaged object pinched | interposed with the film. On the other hand, a plate-like adhesive heater (welding knife) is pressed, and this is shown in a sectional view perpendicular to the conveying direction as shown in FIG. That is, the upper surface of the cushion material a is positioned and fixed at the same height as the transport surface U of a transport device (not shown) that transports while supporting the article P to be packaged sandwiched between the films F and F. The adhesive heater b having a plate-like temperature rise is pressed against the films F and F on the cushion material a to be welded.

  However, when packaging a thick article P such as a newspaper page increase by the above method, the edge of the upper film F is greatly drawn inward by this thickness as shown in FIG. There is a problem that the welding by the adhesive heater b becomes incomplete, and in order to avoid this, a film wider than the lower film F must be used as the upper film F, and the film roll is changed. And the preparation of various types of film rolls is cumbersome and cumbersome.

  Further, as shown in Patent Document 1, the film roll is mounted on and supported on two support rollers, and is rotated by rewinding the film when the object to be packaged is conveyed by the conveying device. Since the film roll is braked by braking the support roller, the unwinding resistance of the film roll largely fluctuates due to changes in the film roll diameter due to the material of the film and its use, and excessive tension is applied. Because the film is torn, it is difficult to insert the packaged product to the transport device, and the outer periphery of the film roll is frictionally braked by the support roller. The braking time fluctuates greatly, and the film is slackened due to insufficient braking and is sandwiched between the support rollers and the next film can be rewound. Lost or, such as a film roll which has become a small diameter and light weight by the use falls off lurching to the side by the braking, it had a lot of problems.

  Further, the left and right sides of the film are welded only once as described in the above-mentioned patent documents (particularly FIG. 11 of Patent Document 1 and FIG. 6 of Patent Document 2). It is possible to wrap packages with a constant size such as newspapers, but long wrapping items may be packed, for example, when a thick newspaper with an increased page size is to be wrapped in two. could not.

  Further, at the time of welding cutting of the rear end of the film, it is possible to prevent an accident in which the cut film adheres to the heater by pressing the film in the vicinity of the plate-like heater pressed against the cushion material. The holding mechanism is driven downward after the object to be packaged sandwiched between the films is conveyed to the welding position by the conveying mechanism. The finished state of the packaged product after welding was inferior due to a shift of the weld line portion on the leading end side of the packaged product or sagging of the film.

  The present invention is intended to solve the above-described conventional problems, and provides a film packaging machine capable of smoothly and smoothly wrapping a film against fluctuations in film material, film roll diameter, and the like. With the goal.

  In order to achieve the above object, a film packaging machine of the present invention is inserted between a film supply device that rotatably supports a pair of film rolls, and a film that is unwound from the film rolls and welded at the leading ends thereof. A transport device for transporting an object to be packaged inserted from the opening toward the carry-out port, and a rear end portion of the film that is disposed between the inlet portion of the transfer device and the insertion port and sandwiches the object to be packaged Welding and cutting apparatus for performing welding and cutting of the film, side welding apparatuses that are disposed on both sides of the transporting apparatus and that perform welding on both the left and right sides of the film, and an output of a sensor provided along the movement path of the package In a film wrapping machine having a control device that automatically starts and stops the conveying device and welds and cuts the film in response to a signal, the film supply device contains a film roll. A holding tool having a fitting part fitted into and removed from the end of the core tube of the film roll and a locking tool press-fitted into the end is rotatably supported on one side wall of the housing space. An electromagnetic brake that brakes the holding tool, and a bearing base that rotatably supports a clamp tool that is fitted to and detached from an end portion of the core tube is provided on the other side wall of the housing space. The clamp tool is supported in a swingable manner by a swing shaft extending in a direction perpendicular to the rotation axis thereof, and the clamp tool is engaged with the core tube, and the retracted position is retracted sideways from the housing space. A switching drive plate that protrudes into the accommodation space and is pressed by the end of the film roll to switch the clamp tool to the fitting position when the clamp tool is in the retracted position is fixed to the bearing base. It is characterized by comprising.

  According to the present invention, the holder is fitted to one end of the core tube of the film roll, and the clamp is fitted to the other end of the core tube to rotatably support the film roll. The return resistance is not affected by the material of the film, and the film can be rewound from the film roll without causing excessive tension or sagging, and can be smoothly and reliably wrapped. In addition, the latch provided on the holder is pressed into the end of the core tube to prevent slippage between the holder and the core tube, and the film roll can be quickly and reliably secured by the electromagnetic brake without being affected by the film material. The film roll does not jump out to the side and fall off due to the braking.

  As described above, according to the present invention, the film can be surely and smoothly welded to fluctuations in the material of the film and the diameter of the film roll.

  Hereinafter, an embodiment of the present invention will be described with reference to an example shown in FIGS. 1 and 2, the film packaging machine 1 is configured by placing a packaging machine body 2 on a gantry 100 provided with a moving caster 101. The packaging machine body 2 has a large front upper corner. Each box described below is provided in a box 3 having a chamfered inclined surface portion. The box body 3 is provided with side frame portions 5 and 5 that extend laterally on the outer peripheral portions of the left and right side walls 4A and 4B, and an outer plate 6 is detachably attached to the side frame portion 5. Each device shown in FIGS. 3 and 4 is accommodated in each space between the side wall 4A and the outer plate 6 and between the side wall 4B and the outer plate 6. Reference numeral 7 denotes an operation panel provided on the inclined side portion of the side frame portion 5. In addition, openings are provided in the front and back portions of the box 3 for attaching and detaching a film roll 15 described later, and an upper cover 8 is detachably attached to the top of the box 3.

  An insertion guide 10 is attached to the box 3 so that a part thereof protrudes from the inclined surface portion, and is surrounded by guide plates 11 and 12 arranged in an inverted C shape and side plates connecting both ends thereof. 13 is formed. A pair of film rolls 15 and 15 are rotatably supported around the central axis at the rear side and the lower side of the charging guide 10, and the support structure will be described later. Reference numeral 16 denotes a guide bar for guiding the film F to be rewound from the film roll 15. The film F is welded to be described later from the guide bar 16 through the back surfaces of the guide plates 11 and 12 of the charging guide 10. It is supplied toward the cutting device 65.

  A conveying device 20 is provided at an obliquely lower position of the charging guide 10 and has a type in which a conveyed object is belt-driven by a lower conveying belt 21 and an upper conveying belt 22. A side welding device 50 (see FIG. 9) for welding the left and right sides of the film is provided, and the rear end of the film is sandwiched between the conveying device 20 and the loading guide 10. A welding cutting device 65 is provided for cutting. 9 is a curved plate-like reversing guide attached to the box 3 so as to face the carry-out port 23 of the transport device 20, 102 is a delivery guide attached to the gantry 100 following the reversing guide 9, and 103 is pulled out to the gantry 100. It is a hopper that is freely attached and comprises a front side plate 104 and a bottom plate 105.

In FIG. 2, S ₁ is a first sensor for detecting that the newspaper P, which is an article to be packaged, has been inserted into the insertion slot 13, and S ₂ is a welding and cutting device 65 in which the rear end of the newspaper P (with film) is attached. A second sensor S3 for detecting that the paper has passed through the section, and S3 is a _third sensor for detecting that the front end of the newspaper has reached the inside of the transport device 20, both of which consist of a light projecting element and a light receiving element. Each of the above detection signals is emitted when the light is shielded or when the light is shielded, and a predetermined amount of front side (traveling direction side) from the exit portion of the insertion guide 10, between the welding and cutting device 65 and the transport device 20, and from the entrance portion of the transport device 20, respectively. In this position, the light beam from the light projecting element is positioned so as to cross the newspaper path, and is fixedly attached to the box body 3 via a feed panel 28 and the like, which will be described later, at the left and right intermediate portions of the box body 3.

  Hereinafter, the details of each of the above devices will be described. First, in the transport device 20, as shown in FIGS. 5 to 7, the lower transport belt 21 includes a drive shaft 24 and a driven shaft that are rotatably supported on the side walls 4A and 4B. As shown in FIG. 9, the upper surface of the lower conveyor belt 21 is wound around pulleys 26 and 27 fixed to 25, respectively, and the left and right edges are fixedly attached to the side walls 4A and 4B. A transport surface U that protrudes a small amount upward from the cutout hole 28a and is inclined by about 45 degrees with respect to the horizontal direction is formed. The upper conveyor belt 22 is wound around pulleys 32 and 33 fixed to a drive shaft 30 and a driven shaft 31 that are rotatably supported by a frame 29, respectively. The frame 29 is rotatable on the side walls 4A and 4B. The drive shaft 30 is rotatably passed through the distal end of an arm 35 whose base is supported by the supported intermediate drive shaft 34 so as to be swingable, so that the intermediate drive shaft 34 can be swung through the arm 35. It is supported by. The frame 29 is urged toward the lower conveyor belt 21 by the compression springs 36, 36, and the upper conveyor belt 22 is urged by the spring force and the weight of the frame 29 and its support. The newspaper P is pushed upward in accordance with the thickness of the newspaper P passing between both belts.

  As a driving system of the conveying device 20, a timing belt 40 is wound around a pulley 38 (see FIG. 3) fixed to the output shaft 37 a of the motor 37 and a pulley 39 fixed to the driving shaft 24, and the lower conveying belt 21. And one gear of the reversing unit 43 that meshes the gears 43A and 43B of the same number of teeth by a timing belt 42 wound around a pulley 41 (see FIG. 4) fixed to the other end of the drive shaft 24. 43A is rotated, and the rotation of the other gear 43B is transmitted to the pulley 45 fixed to the end of the intermediate drive shaft 34 by the timing belt 44, and the pulley 46 fixed to the intermediate drive shaft 34 and the drive shaft 30 respectively. , 47 (see FIG. 5), the lower conveyor belt 21 and the upper conveyor belt 22 are opposed to each other. In, are driven at the same speed in the forward direction indicated by arrow X.

  Next, as shown in FIGS. 6 to 10, the side welding device 50 includes a front end portion of a plate-like adhesive heater 51 in which a heating element (not shown) is attached to a side surface portion, and a silicon rubber sponge body facing the front end portion. An upper part of a rectangular tube-like cover 54 that is attached to the left and right side walls 4A and 4B with a built-in solenoid 53. A lever 56 is pivotally supported by a shaft 55, an adhesive heater 51 is attached to the tip of the lever, and a plunger 53 a of a solenoid 53 is connected to a position near the shaft 55 of the lever 56.

  Further, the base portion of the swing plate 57 extending in the front-rear direction that fits in the notch hole 28b provided in the feed panel 28 along the left and right side walls 4A and 4B is swung by the pins 58 on the side walls 4A and 4B. The cushion member 52 is attached to the distal end portion of the swing plate 57, and the base portion of the lever 60 whose intermediate portion is supported by the lower edge portion 59a of the window portion 59 provided on the side walls 4A and 4B is supported. The plunger 53a of the solenoid 53 is pinned, and the tip of the lever 60 supports the lower surface of the swing plate 57 so as to receive its own weight.

  Accordingly, as shown in FIG. 9, in the protruding state of the plunger 53 a of the solenoid 53, the adhesive heater 51 is rotated upward, the cushion material 52 is rotated downward, and the two are separated from each other. Is located below the conveying surface U of the conveying device 20, so that when the film sandwiching the newspaper enters the conveying device 20, the left and right sides of the film (especially its front end) are the cushion material 52 and it. Can be prevented from interfering with the rocking plate 57 that supports the film, and even when the film is thin, the side portions can be welded in a good state without wrinkles or sagging.

  At the time of side welding of the film F by the side welding device 50, if the plunger 53a is driven in the retracting direction by excitation of the solenoid 53 as shown in FIG. 10, the swing plate 57 and the adhesive heater 51 are driven in the approaching direction. As shown in FIG. 20, the tip of the adhesive heater 51 is pressed against the cushion material 52 whose upper surface is located at a position above the conveying surface U of the conveying device 20 by a predetermined height H. F is welded. Therefore, by setting the height H to a value in the vicinity of about ½ of the maximum thickness of the newspaper P, even if the newspaper P is thick as shown in FIG. Even when the newspaper P is thin as shown in (b), the edge of the upper film F is not drawn inwardly, and the two sides of the film are securely used by using two films of the same width. Welding can be performed.

  Next, as shown in FIGS. 3, 4, 8, and 11, the welding and cutting device 65 includes plate-like cutting heaters 66 each having a heating element (not shown) attached to the side surfaces thereof on the left and right side walls 4 </ b> A and 4 </ b> B, respectively. The lever 68 is pivotally supported by a shaft 67 and is attached to the tip of the lever 68. The intermediate portion of the lever 68 is connected to a plunger 69a of a solenoid 69 attached to the side walls 4A and 4B. A cushion material 71 made of a silicon rubber sponge body or the like that is urged in the projecting direction of 69a and is pressed against the tip of the cutting heater 66 when the plunger 69a is retracted is pasted on the feed panel 28.

  Reference numeral 72 denotes a pressing plate, and a pressing piece portion 72a pressed against the upper surface portion of the cushion material 71 at a position near the rear side of the pressing position of the cutting heater 66 to the cushion material 71 indicated by a chain line in FIGS. The both ends of the presser plate 72 are fixedly attached to the end portions of the arms 74 that are swingably supported by the shafts 73 on the side walls 4A and 4B, and the presser plates are connected by the tension springs 75 connected to the intermediate part of the arms 74. 72 is pressed in the direction in which the pressing piece 72a is pressed against the upper surface of the cushion material 71, and one end of each lever 76 pivotally supported by the shaft 76a on the side walls 4A and 4B is connected to the side walls 4A and 4B. A pin 78 is connected to the plunger 77a of the solenoid 77 attached to the lever 76, and a pin 78 protruding from the inner surface of the other end of the lever 76 is engaged with the lower surface side of the holding plate 72. The plate 72, the pressing piece 72a as shown by a chain line 79 is arranged to drive an open position spaced from the cushion material 71.

In this welding and cutting device 65, before the newspaper is inserted into the insertion slot 13, the solenoid 77 is demagnetized, and the two films F with the tips welded to each other are moved by the spring force of the tension spring 75. A pressing state in which the pressing piece 72 a of the pressing plate 72 is pressed against the cushion material 71 is set. Once the newspaper has been inserted into the insertion opening 13, the presser plate 72 is driven into the open position by energizing a short time the solenoid 77 by the first detection signal of the sensor S ₁ as described later, the newspaper feeder 20 When it is caught, the solenoid 77 is demagnetized to return to the pressing state. As a result, the upper film F that advances together with the newspaper is pressed by the pressing piece 72a, and the lower film F is also pressed against the cushion material 71 by this pressing force. A packaged product having a good finish with no slack is obtained. Further, by maintaining the pressing state even when the film rear end is welded and cut by the welding cutting device 65, the film F can be reliably prevented from coming into contact with the cutting heater 66 or being pulled upward together with the cutting heater 66. It is.

  Next, FIG. 12 to FIG. 15 show a film supply device 80, and a holder 82 provided on one side wall 4 </ b> B portion of the accommodation space 81 for accommodating the film roll 15, and a clamp tool 83 provided on the other side wall 4 </ b> A portion. By holding the both ends of the core tube 15a of the film roll 15, the film roll 15 is rotatably supported. The holding tool 82 includes a fitting portion 84 that is fitted to and removed from the end portion of the core tube 15a, and a plurality of tapered pin-like locking tools 85 that are press-fitted into the end surface portion of the core tube 15a, and is supported on the side wall 4B. A holder 82 is fixed to one end portion of a shaft 87 rotatably supported by 86, and an electromagnetic brake 88 for braking the shaft is provided on the other end portion side of the shaft 87.

  The clamp 83 has the same shape as the holder 82 except that it does not have the locking member 85, and is rotatably supported on the bearing block 89 by a bearing 90 and a one-way needle bearing 90a for preventing reverse rotation. The clamp 91 is supported on the shaft 91 so as to be slidable in the axial direction indicated by the arrow Y. The clamp 83 is urged by the compression spring 92 in the direction toward the end of the core tube 15a, and the bearing block 89 is The mounted bearing base 93 is supported on a support base 94 fixed to the side wall 4A so as to be swingable by a swinging shaft 95 extending in a direction perpendicular to the central axis of the shaft 91. As shown in FIG. 12, it can swing from the fitting position with the core tube 15a whose central axis is oriented in the horizontal direction to the retracted position retracted sideways from the accommodating space 81 as shown in FIG. There.

  96 is a switching drive plate whose upper part is fixed to the bearing stand 93. In the fitting position shown in FIG. 12, it is in a position depending on the inner surface side of the side wall 4A. As shown in FIG. It will be in the state protruded in the accommodation space 81. FIG. Then, as shown in FIG. 14, the steel ball 98 b urged in the pushing direction by the spring 98 a inserted in the hole 97 provided in the side surface portion of the support base 94 is engaged with the hole 99 formed in the bearing base 93. By doing so, the clamp 83 is elastically held at the fitting position, and when the film roll 15 is exchanged, the end of the film roll 15 is manually pulled out in the upward direction indicated by the arrow K. The clamping tool 83 is driven to swing to the retracted position shown in FIG. 15 by the above-described drawing operation, and the upper edge of the left and right protruding pieces 96a and 96a (see FIG. 13) of the switching drive plate 96 and the inner surface of the side wall 4A. In the engaged state, the clamp tool 83 is held in the retracted position by the own weight of the bearing block 89 and the like and the engagement between the steel ball 98b and the lower edge of the side plate portion of the bearing base 93.

  In the film supply device 80 on the front side of the box 3, a swing shaft 95 that swingably supports the bearing base 93 (and hence the clamp tool 83) so that the film roll 15 can be easily attached and detached from the diagonally forward direction. The axis is inclined about 45 degrees with respect to the horizontal plane. (Refer to FIG. 4) As the holding mechanism at the fitting position and the retracted position of the clamp 83, various click stop mechanisms using springs, stoppers, etc. other than the above may be used.

  When the new film roll 15 is set in the film supply device 80, one end of the film roll 15 held by hand is fitted into the holder 82 from an oblique direction, and the other end is indicated by an arrow M in the figure. If it is manually pushed into the accommodating space 81, the projecting switching drive plate 96 is pressed by the outer peripheral portion 15 b of the end of the film roll 15, and the bearing stand 93, and hence the clamp tool 83, swings as shown by the arrow W. Since the rotation is driven around the moving shaft 95 and the clamp 83 is fitted into the end of the core tube 15a and is rotated to the fitting position shown in FIG. 12, the film roll 15 can be set quickly and easily. Also, the core tube 15a after use can be quickly and easily removed by performing the pull-out operation in the direction of the arrow K described above and in the reverse order of the above setting.

  And in the set state of the film roll 15, since the film roll 15 is rotatably supported in the state which hold | maintained the both ends of the core pipe 15a with the holder 82 and the clamp tool 83, the rewinding resistance of the film F is It is not affected by the material of the film F, and the locking tool 85 provided on the holder 82 is pressed into the end of the core tube 15a and integrated with the core tube 15a. The film 88 can be quickly and reliably braked and stopped by the brake 88.

  The operation of each constituent device when the newspaper is wrapped by the film wrapping machine 1 constituted by each of the above devices is performed based on the control pattern by the control device provided in the box 3 and provided on the operation panel 7. Various packaging operations can be selected by operating the pattern changeover switch. First, a normal wrapping operation for a normal-sized newspaper in a folded state will be described with reference to a timing chart shown in FIG.

(1) First, the film F rewound from the film supply device 80 is pressed at the cutting position on the cushion material 71 of the welding cutting device 65 with the tip portions welded to each other. It is pressed by.

(2) When a normal-sized newspaper P in a quadruple state is inserted into the insertion slot 13 with its longitudinal direction turned to the left and right, the first sensor S ₁ detects the front end of the newspaper that falls and advances along the guide plate 11. Since the motor 37 is activated and the solenoid 77 is excited to open the presser plate 72, the front end of the newspaper P reaches the entrance of the transport device 20 while being sandwiched between the films F and F, and the upper transport. It is sandwiched between the belt 22 and the lower conveyor belt 21 and conveyed forward.

(3) to the transport start immediately before by the conveying device 20, the solenoid 77 by the newspaper detection signal by the second sensor S ₂ is demagnetized, the presser plate 72 is returned to the pressing state by the spring force, the pressing piece 72a is newspapers P Since the upper film F is pressed down, the upper film F is conveyed while being rewound from the film roll 15 in a form along the upper surface of the newspaper P without sagging.

(4) On the other hand after detection of the entry into the newspaper P of the transfer device 20 by the third sensor S _3, after a predetermined time period has elapsed, the motor 37 switched to the low-speed operation gives a deceleration command, the trailing edge of the newspaper P is the after passing through the second sensor S ₂ position, stops the motor 37, excites the solenoid 53,69, also than this energizes the electromagnetic brake 88 of the film feeding device 80 after a predetermined time period, braking the two film roll 15 Then stop.

(5) By the side welding device 50 and the welding cutting device 65, the left and right sides of the newspaper P, and the newspaper P, which is sandwiched between the two films F and stopped by the motor stop and the excitation of each solenoid, The two rear films F are pressure-welded.

(6) Thereafter, the solenoids 53 and 69 are demagnetized after a predetermined time, but the solenoid 69 has a longer excitation time than the solenoid 53, and the motor 37 is activated during the excitation of only the solenoid 69, and the film F is wrapped by the above welding. By forcibly driving the newspaper P, the film F is cut by the pressurizing unit by the cutting heater 66 and conveyed forward as a film packaged product Q.

(7) when detecting the trailing portion passage of the newspaper P by the third sensor S _3, and cancels the stop holding the film roll 15 by the electromagnetic brake 88 of the film supply device 80 returns to the insertion state of the next newspaper P .

(8) The obtained film packaged product Q is reversed by the reversing guide 9 part from the carry-out port 23 part of the conveying device 20, slides down on the delivery guide 102, and is accumulated in the drawn hopper 103.

  Next, the complete sealing operation will be described with reference to the timing chart shown in FIG. That is, in the normal packaging operation, a slight gap equal to the gap g between the heaters shown in FIG. 8 is formed between the side weld line (rear end) of the film F and the rear end weld line. When the above gap is also adhered and completely sealed, such as when there is heavy rain during newspaper delivery, the sealing operation is performed by selecting a complete sealing pattern. During this operation, (1) to (5) are the same as the normal packaging operation, and the following operation is performed subsequently.

(6) While the solenoid 53 is demagnetized and only the solenoid 69 is energized, the motor 37 is operated at a low speed for a short time and then stopped to cut the film weld on the rear side of the newspaper. Add side welds.

(7) after the demagnetization of the solenoid 53, and conveyed after the package Q to start the motor 37 briefly forward, it detects the rear end portion passes through the third sensor S _3, similar to (7) of the normal operation At the same time, the film roll stopped by the electromagnetic brake is released, and the next newspaper can be put into the ready state.

(8) The obtained film-sealed package is accumulated in the hopper in the same manner as (8) in the normal packaging operation.

  As described above, the complete sealing operation is obtained by adding a short time operation of the motor 37 and a side welding addition step by exciting the solenoid 53 to the normal operation. By setting the gap size to be equal to or greater than g, the film side portion is completely sealed up to the rear end weld line.

  Next, assuming that the article to be packaged is a long article, a long article packaging operation for inserting and packaging the folded newspaper P in a vertically long state will be described with reference to the timing chart shown in FIG. 18 and FIG. To do. This operation is performed by selecting the long control pattern by the control device, and during this operation [1] to [3], the folded newspaper P is oriented with its longitudinal direction in the front-rear direction. The operations are the same as the operations (1) to (3) of the normal packaging operation except that the motor is inserted into the insertion port and the motor is operated at a low speed, and the following operation is performed subsequently.

[4] After the entry into the newspaper P of the transfer device 20 is detected by the third sensor S ₃ [FIG. 19 (a) see, stops the motor 37 after a predetermined time period T, excites the solenoid 53, the film The electromagnetic brake 88 of the supply device 80 is energized to brake and stop the two film rolls 15.

[5] With respect to the stopped newspaper P sandwiched between the two films F by the motor stop and the excitation of the solenoid 53, the two films F on the left and right sides of the newspaper P are moved by the side welding device 50. The pressure welding is performed for a length L substantially equal to the length of the adhesive heater 51. [Refer to FIG. 19 (b)]

[6] After that, the electromagnetic brake 88 is turned off after a predetermined time, the solenoid 53 is demagnetized, and then the motor 37 is restarted after a short time. the but semi package that is welded, and transported forward at a low speed, when the trailing end of the paper P passes through the second sensor S ₂ position, stops the motor 37, excites the solenoid 53,69, also from this The electromagnetic brake 88 is energized after a predetermined time period, and the two film rolls 15 are braked and stopped. These operations are the same as (4) of the normal packaging operation.

[7] The two films F on the left and right sides and the rear side of the newspaper P are pressure welded by the side welding device 50 and the welding cutting device 65 by the motor stop and the excitation of each solenoid. Although the welded part by the welding on both the left and right sides partially overlaps with the welded part in the above step [5], a welded part having a length L ′ indicated by a thick line in FIG. 19C is newly added. Become.

[8] Thereafter, the demagnetization of the solenoids 53 and 69 and the activation of the motor 37 during the excitation of only the solenoid 69 are performed in the same process as (6) of the normal wrapping operation. Since the long packaged product Q ′ [see FIG. 19 (c)] obtained by cutting the film F is obtained, the long packaged product is put into the hopper 103 by the same operation as (7) and (8) of the normal packaging operation. Accumulate in.

  Further, when the unwelded portion having the length at the rear end of the side welded portion in the long packaged product Q ′ is also welded and completely sealed, the operation of the complete sealing operation is performed following the operation [7]. (6), (7) may be performed and the said side part welding addition process should just be added, and the long sealed package goods by which the film side part was completely sealed to the rear-end part welding line by this are obtained.

  In addition to the above-mentioned bi-fold vertically long newspaper, in order to wrap even longer articles to be packaged, conveyance for a predetermined time T in FIG. 18, welding by the side welding device 50, and restart of the motor 37 are performed. The process consisting of (partial welding process shown in FIG. 18) may be repeated a plurality of times according to the length of the article to be packaged, and then the operation after the above operation [6] may be performed.

  The present invention is not limited to the above example. For example, the material and shape of each part may be other than those described above.

  Further, the case where the article to be packaged is a newspaper has been described above, but the film wrapping machine of the present invention can be used for packaging various sheets or sheet bundles (including booklets) such as magazines and calendars in addition to newspapers. The present invention can be widely applied to a packaging machine for packaging an object with a film.

It is a perspective view of the film packaging machine which shows an example of embodiment of this invention. It is a longitudinal cross-section (the AA sectional view taken on the line in FIG. 6) of the film packaging machine of FIG. It is a front view of the side wall 4B part of the packaging machine main body of FIG. It is a front view of the side wall 4A part of the packaging machine main body of FIG. It is an enlarged view of 20 parts of conveying apparatuses in FIG. It is an arrow BB side view in FIG. FIG. 7 is a plan view taken along the line CC in FIG. 6. It is the DD sectional view taken on the line of FIG. It is the EE sectional view taken on the line of FIG. FIG. 10 is a view corresponding to FIG. 9 showing a film adhesion state. It is the G section enlarged front view of FIG. It is the HH sectional view taken on the line of FIG. It is an arrow II front view of FIG. It is the JJ sectional view taken on the line of FIG. FIG. 13 is a view corresponding to FIG. 12 illustrating a film roll mounting operation. It is a timing chart which shows the normal packaging operation | movement of the film packaging machine of FIG. It is a timing chart which shows the sealing packaging operation | movement of the film packaging machine of FIG. It is a timing chart which shows the elongate packaging operation | movement of the film packaging machine of FIG. It is a schematic plan view which shows the film packaging process at the time of the elongate packaging operation | movement of the film packaging machine of FIG. It is a schematic longitudinal cross-sectional view which shows the side part welding operation | movement in the film packaging machine of this invention. It is a perspective view which shows a general film packaging process. It is a schematic longitudinal cross-sectional view which shows the side part welding operation by the conventional film packaging machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Film packaging machine, 4A ... Side wall, 4B ... Side wall, 13 ... Insertion port, 15 ... Film roll, 20 ... Conveying device, 23 ... Carry-out port, 50 ... Side part welding apparatus, 50A ... Side part welding apparatus, 50B ... Side welding device, 51 ... Adhesive heater, 52 ... Cushion material, 53 ... Solenoid, 56 ... Lever, 57 ... Swing plate, 60 ... Lever, 65 ... Welding and cutting device, 66 ... Cutting heater, 71 ... Cushion material, 72 ... Presser plate, 72a ... Pressing piece, 75 ... Tension spring, 76 ... Lever, 77 ... Solenoid, 80 ... Film supply device, 81 ... Storage space, 82 ... Holding tool, 83 ... Clamping tool, 84 ... Fitting part, 85 ... locking part, 88 ... electromagnetic brake, 93 ... bearing pedestal, 94 ... support platform, 95 ... pivot shaft, 96 ... switching drive plate, F ... film, S 1 _... first sensor, S 2 _... second sensor , S ₃ ... third sensor.

Claims (1)

  A film supply device that rotatably supports a pair of film rolls, and an object to be packaged inserted from an insertion port between films unwound from the film roll and welded to each other at the leading end thereof, and conveyed toward the carry-out port. A welding apparatus for welding and cutting a rear end portion of the film which is disposed between the inlet portion of the conveying apparatus and the insertion port and sandwiches the article to be packaged; and on both sides of the conveying apparatus. Automatic start / stop of the transport device and welding / cutting of the film by an output signal of a side welding device that is disposed and welds the left and right sides of the film and a moving path of the package A film wrapping machine equipped with a control device for the film roll, wherein the film supply device has an end portion of the core tube of the film roll on one side wall portion of the housing space for housing the film roll. A holding tool provided with a fitting part to be fitted and detached and a locking tool press-fitted into the end part is rotatably supported, an electromagnetic brake for braking the holding tool is provided, and the other of the accommodation space is provided. On the side wall, a bearing base that rotatably supports the clamp fitting fitted to and detached from the end of the core tube is supported in a swingable manner by a swing shaft that extends in a direction perpendicular to the rotation axis of the clamp tool. Then, the clamp tool can be switched between two positions: a fitting position with the core tube and a retracted position retracted laterally from the accommodating space. When the clamp tool is in the retracted position, The film wrapping machine is characterized in that a switching drive plate that protrudes in the direction and is pressed by the end of the film roll to switch the clamp to the fitting position is fixed to the bearing stand.

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