JP2009286411A - Sealing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To fix a pressure welding bar provided with a heating element to make only one side movable, and to improve safety more by avoiding exposure of the pressure welding bar provided with the heating element except the necessary time. <P>SOLUTION: A welding cutting mechanism 20 is constituted by providing a fixed pressure welding bar 21 equipped with the heating element 23 contact-weldable to a film member F, a movable pressure welding bar 22 positioned at two positions which are a pinching position X for pinching the film member F by cooperating with the fixed pressure welding bar 21 and a separated position Y separated by a specified interval, and a pressure welding bar driving part 30 for moving and driving the movable pressure welding bar 22. A shutter mechanism 50 is provided. The shutter mechanism exposes the pressure welding face of the fixed pressure welding bar 21 at the specified position when the movable pressure welding bar 22 is moved from the separated position Y to the pinching position X, and covers the pressure welding face of the fixed pressure welding bar 21 at the specified position when the movable pressure welding bar 22 is moved from the pinching position X to the separated position Y. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a sealing device that seals a container such as dust or manure to a resin film, and in particular, a sealed body that seals the container by welding the front and back of a cylindrical film member and cutting the container. The present invention relates to a sealing device to be created.

Conventionally, as this kind of sealing device, for example, in a place without toilet facilities, for example, a private room such as a hospital or a nursing facility, a bedroom in a general household, or a place where toilet facilities are not permanently installed such as a construction site. Portable toilets that are useful for use are known.
This is described in, for example, Patent Document 1 (Japanese Patent Laid-Open No. 7-223617) and the like, and as shown in FIG. 18, the manure as the container W is sealed in a resin film member F. A box-shaped base body 100, a funnel-shaped guide member 102 provided on the base body 100 and having an opening 103 that forms the valve seat 101 and guiding manure to the lower outlet 105, and provided on the outer periphery of the guide member 102. A cylindrical resin film member F that is annular and is folded in a bellows shape in the longitudinal direction, and is accommodated by being loosely fitted to the outer periphery of the guide member 102; A processing unit 110 that covers the inner surface of the guide member 102 from the opening 103 and processes the film member F passed through the outlet 105.

  The processing unit 110 processes the film member F to generate a sealed body M in which a container W made of manure is accommodated and sealed, and is provided with a machine casing 111 and a cylindrical shape provided in the machine casing 111. A sending mechanism 112 for sending the resin film member F along the longitudinal direction; and a welding cutting mechanism 113 for welding and cutting the film member F provided on the machine casing 111 along the direction perpendicular to the longitudinal direction; It has. The sending mechanism 113 includes a pair of rollers 114 that hold the side edge of the film member F and feed it downward. Two sets of rollers 114 are provided on both sides of the film member F and spaced apart so as to form a space for receiving manure (only one set is shown in the figure).

  The welding cutting mechanism 113 is moved in a direction perpendicular to the feeding direction of the film member F so as to be moved closer to and away from each other, a holding position X where the film member F is pressed and held, and a separation position Y which is spaced apart from each other by a predetermined distance. A pair of pressure-bonding bars 116 positioned on the surface of the pressure-bonding bar 116 is provided, and one of the pressure-bonding bars 116 is provided with a heating element (strip heater) (not shown) that welds the film member F when held. Reference numeral 106 in the figure denotes a lid that opens and closes the valve seat 103, and 107 denotes a container that is provided below the processing unit 110 and receives and stores the sealing body M generated by the processing unit 110.

  And when using the portable toilet as this sealing device, the downstream side of the film member F is previously welded by the welding cutting mechanism 113 and the upstream side is opened. In this state, it sits on the valve seat 103 and drops manure inside. Thereby, since the downstream side of the film member F is sealed by welding, manure is accumulated in the film member F. Next, when the operation switch (not shown) is turned on to operate the delivery mechanism 112, the film member F is sent out downward, the welding cutting mechanism 113 is operated at a required position, and the pair of crimping bars 116 are separated. The film is moved from the position Y to the holding position X, and is pressed and held on the film member F at the holding position X. The heating element is heated, and the upstream side of the film member F is welded and cut. At this time, the downstream side of the film member F to be delivered next is welded simultaneously. When cut, a sealed body M that seals the contents W is generated, and the sealed body M falls into the container 107 and is stored. Then, the container 107 is taken out from the base body 100 at an appropriate time, and the sealed body M is discarded.

JP-A-7-223617

By the way, in the above conventional sealing device, since the crimp bar with the heating element is always exposed and moves, it is accidentally done by hand when taking out the container from the base in the input state of the power source. There was a problem that there was a risk of touching.
The present invention has been made in view of the above-described problems. The crimping bar provided with the heating element is fixed so that only one of the bars can be moved, and the heating element is provided except when necessary. An object of the present invention is to provide a sealing device in which the crimping bar is not exposed so as to improve safety.

The technical means of the present invention for achieving such an object includes a delivery mechanism for delivering a cylindrical resin film member along its longitudinal direction, and the delivered film member orthogonal to the longitudinal direction. A welding cutting mechanism that welds and cuts along the direction, after the downstream side of the film member is first welded by the welding and cutting mechanism, and the contents are put inside with the upstream side opened In the sealing device for welding and cutting the upstream side of the film member to create a sealed body in which the contents are sealed,
The welding and cutting mechanism is provided on one side of the film member to be sent out and fixed on the film member and can be crimped to the film member, and moved on the other side of the film member to be sent out and crimped to the film member. A movable crimping bar positioned at two positions: a clamping position for clamping the film member in cooperation with the fixed crimping bar; and a spaced position spaced apart from the fixed crimping bar by a predetermined distance; and a crimping bar for moving and driving the movable crimping bar Comprising a drive unit and a heating element that is provided on the fixed pressure bonding bar and welds the film member at the time of holding;
When the movable crimp bar moves from the separated position to the holding position, the crimp surface of the fixed crimp bar is exposed at a predetermined position, and when the movable crimp bar moves from the clamp position to the separated position, the fixed crimp bar at the predetermined position. A shutter mechanism that covers the pressure-bonding surface of the bar is provided.

  Thereby, when producing the sealing body which accommodated the things to contain, the downstream side of a film member is first welded by the welding cutting mechanism, and the upstream side is left open. In this state, the contents are accommodated inside the film member, and then the upstream side of the film member is welded and cut again by the welding and cutting mechanism. In this case, the film member is sent downward by the delivery mechanism, and the welding cutting mechanism is operated at a required position. In the welding and cutting mechanism, the movable crimping bar is moved from the separated position to the holding position by the crimping bar driving unit, and is crimped to the film member at the clamping position to hold it. In this state, the heating element of the fixed crimp bar is heated, and the film member is welded and cut to produce a sealed body that seals the contents. Next, the movable crimping bar is moved from the holding position to the separated position by the crimping bar driving unit and returned to the original position.

  In this movement of the movable crimp bar, the shutter mechanism exposes the crimp surface of the fixed crimp bar at a predetermined position when the movable crimp bar moves from the separated position to the holding position, and the movable crimp bar moves from the held position to the separated position. When this is done, the crimping surface of the fixed crimping bar is covered at a predetermined position. Therefore, except when necessary, the fixed crimp bar provided with the heating element will not be exposed and the fixed crimp bar provided with the heating element will not move. Safety is improved.

  If necessary, the shutter mechanism can be moved to two positions: a cover position that covers the crimping surface of the fixed crimping bar and an exposed position that exposes the crimping surface of the fixed crimping bar, and the shutter is driven to move. And a shutter driving unit. The shutter driving unit can automatically open and close the shutter.

  Further, if necessary, the shutter is rotatably supported on a rotation shaft provided in parallel with the fixed crimp bar, and is moved to the cover position and the exposure position by the rotation of the rotation shaft. The configuration is made possible. Since the shutter is opened and closed by rotation, the mechanism can be simplified.

  Further, if necessary, the shutter is allowed to rotate at a predetermined position in the middle of moving the movable crimp bar from the separation position to the holding position, and a predetermined position in the middle of moving the movable crimp bar from the holding position to the separation position. Thus, a configuration is provided in which a lock mechanism that disables the rotation of the shutter is provided. Since the rotation of the shutter is locked by the lock mechanism, it is possible to prevent a situation where the shutter drive unit opens the shutter when it is unnecessary due to a malfunction or the like, thereby ensuring safety.

  In this case, if necessary, the lock mechanism can be moved to an engagement portion provided on the shutter, an engagement position that engages with the engagement portion, and a non-engagement position that disengages from the engagement portion. And a moving mechanism for moving the engaged portion in conjunction with the movement of the movable crimping bar. There is no need to provide a separate driving means, and the lock mechanism can be configured relatively simply.

  Further, if necessary, the engaging portion is constituted by a pin having an axis in a direction orthogonal to the moving direction of the movable crimping bar, and the engaged portion can be moved in the moving direction of the movable crimping bar. A hook member provided on the frame and having a hook portion that engages with a pin on the tip end side is provided with a spring that urges the hook member in the engaging direction, and the movable crimp bar is disposed on the movable crimp bar. In the middle of reaching the holding position, a locking member that locks the hook member and presses the hook member in the non-engagement direction against the biasing force of the spring is provided. There is no need to provide a separate driving means, and the lock mechanism can be configured relatively simply.

  According to the sealing device of the present invention, when the film member is welded by the welding and cutting mechanism, the fixed pressure bar provided with the heating element is not exposed by the shutter mechanism except when necessary. Can be suppressed, and safety can be improved. Further, since the fixed crimp bar provided with the heating element does not move, it is possible to suppress a situation where the hand is accidentally touched, thereby further improving safety.

  Hereinafter, based on an accompanying drawing, a sealing device concerning an embodiment of the invention is explained in detail. The sealing device according to the present embodiment is, for example, in a place without toilet facilities, such as a private room such as a hospital or a nursing facility, a bedroom in a general household, or a place where toilet facilities are not permanently installed such as a construction site. A portable toilet that is useful to use.

  As shown in FIG. 1, a portable toilet as a sealing device T according to an embodiment of the present invention creates a sealed body M by sealing urine as a container W with a resin film member F. A box-shaped base 1, a valve seat 2 provided on the top of the base 1, a funnel-shaped guide member 3 provided at the bottom of the valve seat 2 and having an opening 3a for guiding manure to a lower outlet 3b, and a guide An accommodating portion 4 provided on the outer peripheral portion of the member 3 and accommodated by being loosely fitted to the outer periphery of the guide member 3 in a state in which the cylindrical resin film member F is annularly folded in a bellows shape in the longitudinal direction. 4 and a processing section S that processes the film member F that passes through the outlet 3b while covering the inner surface of the guide member 3 from the opening 3a of the guide member 3. In FIG. 1, reference numeral 5 is a lid for opening and closing the valve seat 2, and 6 is a container provided below the processing unit S. The container 6 receives and stores the sealed body M generated by the processing unit S, and can take out the sealed body M that has been drawn out from the base body 1 and stored in a timely manner.

As shown in FIGS. 1 to 11, the processing unit S processes the film member F to generate a sealed body M in which a container W made of manure is contained and sealed, and the machine frame 10 and The feeding mechanism 11 provided in the machine frame 10 for sending the cylindrical resin film member F along the longitudinal direction, and the film member F provided on the machine frame 10 and sent out along the direction perpendicular to the longitudinal direction. And a welding cutting mechanism 20 for welding and cutting.
As shown in FIGS. 1 to 3 and FIGS. 5 to 7, the delivery mechanism 11 includes a pair of rollers 12 that hold the side edges of the film member F and feed it downward. Two sets of the rollers 12 are provided on both sides of the film member F at a distance so as to form a space for receiving manure. Each roller 12 is rotated by an electric feed motor 13 (synchronous motor) via a transmission mechanism (not shown).

  The welding / cutting mechanism 20 includes a pair of pressure-bonding bars 21 and 22 that are at least one of which is moved in a direction orthogonal to the feeding direction of the film member F to press the film member F and hold it. In the embodiment, a fixed crimp bar 21 provided on one side of the film member F to be sent and capable of being crimped to the film member F, and moved to the other side of the film member F to be sent and crimped to the film member F. A movable crimping bar 22 positioned at two positions, a gripping position X for gripping the film member F in cooperation with the fixed crimping bar 21 and a spaced position Y spaced apart from the fixed crimping bar 21 by a predetermined distance, is provided. As shown in FIGS. 2 to 4, the fixed crimp bar 21 is provided with a heating element 23 (strip-shaped electric heater) that welds the film member F during clamping. Further, at the center of the pressure-bonding surface of the fixed pressure-bonding bar 21, a ridge 24 is provided so as to immerse in the welding part Fa of the film member F that is welded during clamping, and to separate and cut the welding part Fa up and down. ing. The heating element 23 and the ridges 24 are coated with a heat resistant resin such as a fluororesin.

  On the other hand, the movable crimping bar 22 includes a crimping bar body 25 and a support member 26 that supports the crimping bar body 25 as shown in FIGS. The crimp bar main body 25 is composed of a bar-shaped crimp member 25a having a rectangular cross section formed of a heat-resistant rubber that forms a crimp surface, and an attachment member 25b to which the crimp member 25a is attached on the back side. As shown in FIG. 4, the longitudinal center of the mounting member 25b is supported so as to be rotatable about a shaft portion 27 having an axis along the delivery direction of the film member F with respect to the support member 26. Thus, the crimp bar main body 25 is supported to be swingable with respect to the support member 22 around the central shaft portion 27. Further, as shown in FIG. 4, stoppers 26 a are provided on the left and right sides of the support member 26 so that the left and right ends of the crimp bar main body 25 come into contact with each other to define the rotation range thereof. Since the rotation is defined, a situation where the crimp bar main body 25 largely fluctuates is prevented. Further, as shown in FIG. 10, a holding member 28 for holding the support member 26 is provided at the left and right ends of the support member 26, and the holding member 28 is composed of a rod provided on the machine frame 10. The rail 29 is slidably supported so that the movable crimp bar 22 is movable.

  In addition, a crimping bar driving unit 30 for moving and driving the movable crimping bar is provided. As shown in FIGS. 2, 3, and 10, the crimp bar driving unit 30 is provided on the fixed crimp bar 21 side of the machine frame 10 and pulls the movable crimp bar 22 from the separation position Y to the holding position X side. 31 and an electric motor composed of a synchronous motor which is provided on the movable crimping bar 22 side of the machine frame 10 and pulls the movable crimping bar 22 against the pulling force of the pulling mechanism 31 and pulls the wire 32 in and out of tension. The drive motor 33 is provided. The traction mechanism 31 is provided with a pair of left and right ends corresponding to both ends of the movable crimping bar 22. One end is fixed to the movable crimping bar 22, the other end is wound around the main body, and torque returning to the winding side is generated. It is configured with a conston spring 34 that is constant and does not change depending on the position of the movable crimping bar 22. In this case, since the torque returning to the winding side is constant, the movable crimp bar 22 can be moved stably. The drive motor 33 is fixed to the outside of the machine casing 10 and rotates the reel 35 around which the wire 32 is wound. When the wire 32 is wound, the movable crimp bar 22 is pulled and moved to the separation position Y against the pulling force of the pulling mechanism 31, and when the wire 32 is fed, the pulling force of the conston spring 34 of the pulling mechanism 31 is used. The movable crimp bar 22 is pulled and moved to the holding position X. Further, the movable crimping bar 22 can be stopped at an appropriate position by the stop control of the drive motor 33. As a result, a relatively simple mechanism uses an electric motor for taking in and out the wire, and also ensures the safety of the equipment during wire cutting, and realizes the function of the welding cutting mechanism by moving one crimping bar. Will be able to.

Further, in this apparatus, when the movable crimping bar 22 moves from the clamping position X to the separated position Y while holding the downstream side of the welding part Fa of the film member F with respect to the movable crimping bar 22 moving at the clamping position X, A peeling means 40 is provided so as to peel off the welding portion Fa from the fixed pressure bonding bar 21.
The peeling means 40 is provided on the side of the fixed pressure bonding bar 21 and directly below the fixed pressure bonding bar 21, is supported so as to be movable in the same direction as the movable pressure bonding bar 22, and is jointed with the movable pressure bonding bar 22 at the holding position X. Then, the presser bar 41 that holds the downstream side from the welding part Fa of the film member F, and the presser bar 41 between the holding position X and the intermediate position from the holding position X to the separation position Y, the presser bar 41 is moved. 22 and a moving mechanism 42 that moves together. As shown in FIG. 9, the presser bar 41 is slidably supported and movable with respect to the fixed crimping bar 21, and is always moved toward the separation position Y side of the movable crimping bar 22 by the spring 43. Is biased in the direction opposite to the moving direction (the same direction as the moving direction of the movable crimping bar 22 toward the gripping position X side). To be able to position.

As shown in FIGS. 5 to 9, the moving mechanism 42 includes an engagement portion 44 provided on one of the movable crimping bar 22 and the presser bar 41 (movable crimping bar 22 in the embodiment), and a movable crimping bar. An engaged portion that is provided on the other of the bar 22 and the presser bar 41 (the presser bar 41 in the embodiment) and engages with the engaging portion at the holding position X and is released in the middle of reaching the separation position Y. 46.
Specifically, the engaging portion 44 is configured by a pin (denoted 44) having an axis in a direction orthogonal to the moving direction of the movable crimping bar 22, and the engaged portion 46 has a proximal end side of the movable crimping bar 22. It is configured by a hook member (denoted as 46) having a hook portion 46a that is provided so as to be rotatable around a rotation shaft 45 having an axis in a direction orthogonal to the moving direction and that engages with the pin 44 at the tip end side. Yes. Further, as shown in FIG. 9, the presser bar 41 is provided with a spring 47 that biases the hook member 46 in the engaging direction. The tip of the hook member 46 is inclined so that the hook member 46 is rotated in the non-engagement direction by being pressed relatively to the pin 44 when the movable crimping bar 22 moves to the holding position X. Further, the presser bar 41 is provided with a stopper 48 that is positioned at the same position as the rotational position where the hook member 46 is engaged when the hook member 46 is not engaged. Further, in the machine frame 10, the movable crimping bar 22 is locked to the protrusion 46 b provided on the hook member 46 in the middle of reaching the separation position Y, and the hook member 46 is moved in the non-engagement direction against the urging force of the spring 47. A locking member 49 that is rotated to release the engagement of the hook portion 46 is provided.
In addition, the control unit described later causes the crimping bar driving unit 30 to temporarily stop the movement of the movable crimping bar 22 before the gripping of the movable crimping bar 22 and the presser bar 41 is released, so that the film member F Is controlled to cool.

  Furthermore, in this apparatus, as shown in FIGS. 2, 3 and 10, when the movable crimping bar 22 moves from the separation position Y to the holding position X, the crimping surface of the fixed crimping bar 21 is exposed at a predetermined position. When the movable crimping bar 22 moves from the holding position X to the separation position Y, a shutter mechanism 50 is provided that covers the crimping surface of the fixed crimping bar 21 at a predetermined position. The shutter mechanism 50 includes a shutter 51 that can be moved to two positions, a covering position Q that covers the crimping surface of the fixed crimping bar 21 and an exposure position R that exposes the crimping surface of the fixed crimping bar 21, and a shutter that moves and drives the shutter 51. And a drive unit 52. As shown in FIGS. 2 and 3, the shutter 51 is formed of a plate-like shutter main body 51a having a large number of air holes and a leg 51b extending from the shutter main body 51a. The leg 51b is a fixed pressure bonding bar. 21 is supported by a rotation shaft 53 provided in parallel with the motor 21, and can be moved to two positions of a cover position Q and an exposure position R by the rotation of the rotation shaft 53. The shutter drive unit 52 includes an electric motor 54 (stepping motor) and a transmission mechanism 55 including a gear train that transmits the rotation of the electric motor 54 to the rotation shaft 53. The electric motor 54 of the shutter driving unit 52 is controlled by a control unit which will be described later. By controlling the electric motor 54, the shutter 51 is moved from the covering position Q after the movable crimping bar 22 is positioned at the intermediate position from the separation position Y. When the movable crimping bar 22 is moved from the gripping position X to the separation position Y and approaches the separation position Y when it is positioned at the exposure position R, it is moved from the exposure position R to the covering position Q.

In addition, as shown in FIGS. 2, 3, and 10, the movable crimping bar 22 is allowed to rotate at a predetermined position while the movable crimping bar 22 is moving from the separation position Y to the clamping position X, and the movable crimping bar 22 is clamped. A lock mechanism 60 that disables the rotation of the shutter 51 at a predetermined position in the middle of moving from the position X to the separation position Y is provided.
The lock mechanism 60 is provided in the machine frame 10 so as to be movable to an engaging portion 61 provided on the shutter 51 side, an engaging position that engages with the engaging portion 61, and a non-engaging position that is disengaged from the engaging portion 61. And an engaged portion 62 that is moved in conjunction with the movement of the movable crimping bar 22.

  Specifically, the engaging portion 61 is configured by a pin (denoted as 61) having an axis in a direction orthogonal to the moving direction of the movable crimping bar 22, and is fixed to the rotating shaft 53 of the shutter 51 via the arm 65. ing. The engaged portion 62 is configured by a hook member (denoted as 62) having a hook portion 62 a that is provided on the machine frame 10 so as to be slidable in the moving direction of the movable crimping bar 22 and engages with the pin 61 on the tip side. ing. A spring 63 for urging the hook member 62 in the engaging direction is installed between the machine frame 10 and the hook member 62, and the movable crimp bar 22 is hooked to the movable crimp bar 22 on the way to the holding position X. A locking member 64 that locks the member 62 and presses the hook member 63 in the non-engaging direction against the urging force of the spring 63 is provided.

  In the embodiment, as shown in FIGS. 2, 3, 4 (b) and 11, when the wire 32 is cut by the drive motor 33 of the crimp bar drive unit 30, the movable crimp bar is used. A stop mechanism 70 is provided to stop the movement of 22. The stop mechanism 70 is provided at both ends of a rotation shaft 71 provided to be rotatable along the longitudinal direction of the movable crimping bar 22, and is a protruding position J that protrudes from the movable crimping bar 22 by the rotation of the rotation shaft 71. The lever 72 is retractable to the movable crimping bar 22 side and is locked to the movable crimping bar 22 so as to be integrated with the lever 72. A spring 73 that biases the lever 72, and a distal end of the wire 32 that is extended to the proximal end side of the lever 72 is attached, and the lever 72 is retracted by applying a moment against the biasing force of the spring 73 by the tensile force of the wire 32. A wire attaching portion 74 positioned at K and a stop member 75 provided on the machine frame 10 and capable of stopping the lever 72 positioned at the protruding position J are provided.

  Furthermore, this apparatus includes a control unit (not shown). The control unit stops driving the feed motor 13 of the delivery mechanism 11, the drive motor 33 of the crimp bar drive unit 30 in the welding cutting mechanism 20, and the electric motor 54 of the shutter drive unit 52 in the shutter mechanism 50 at a required timing. Control as follows. The control unit causes each motor to operate for a predetermined cycle based on an ON signal of an operation switch (not shown). Further, as shown in FIG. 10, the machine frame 10 is provided with a plurality of position sensors 81, 82, 83 for detecting the movement position of the movable crimping bar 22, and the control unit is provided with the position sensors 81, 82. , 83 in particular, the drive motor 33 and the electric motor 54 are controlled. As shown in FIG. 10, the movable crimping bar 22 is controlled by the drive motor 33 so that the separation position Y (home position), the intermediate position P (middle position), and the contact position (end position) with the fixed crimping bar 21. ), It is positioned at each position of the gripping position X where it is further pushed and moved from the contact position toward the fixed crimp bar 21 side. The electric motor 54 is driven and controlled so that the shutter 51 is located from the covering position Q to the exposure position R after the movable crimping bar 22 is located from the separation position Y to the intermediate position P, and the movable crimping bar 22 is separated from the holding position X. When moving to the position Y and approaching the separation position Y, the shutter 51 is controlled to be positioned from the exposure position R to the covering position Q.

Furthermore, the controller operates the feed motor 13 of the delivery mechanism 11 little by little until the film member F that comes into contact with the movable crimping bar 22 in the moving process is crimped to the fixed crimping bar 21. Tension adjusting means for adjusting the tension generated by feeding and adjusting the film member F is provided. Specifically, the tension adjusting means performs a slight feed of the film member F twice while the movable crimping bar 22 moves from the separation position Y to the intermediate position P, and further moves from the intermediate position P to the holding position X. During this time, the film member F is slightly fed once ("film pinching synchronization operation" in the flowchart).
In addition, the controller controls the position of the movable crimping bar 22 before the gripping of the movable crimping bar 22 and the presser bar 41 is released at an intermediate position P in the process of moving the movable crimping bar 22 from the gripping position X to the separation position Y. A function of controlling the drive motor 33 of the crimp bar drive unit 30 is provided so that the movement is temporarily stopped and the film member F is cooled.
Further, the control unit controls the film by the delivery mechanism 11 before the holding of the movable crimping bar 22 and the presser bar 41 is released at the intermediate position P in the process of moving the movable crimping bar 22 from the clamping position X to the separation position Y. The member F is slightly returned in the direction opposite to the delivery direction, and the feed motor 13 of the delivery mechanism 11 is controlled to be reversely controlled so that the welded portion Fa located above the sealing body M is peeled off from the movable crimping bar 22. ing.

Therefore, when the portable toilet as the sealing device T according to this embodiment is used, the following is performed. In the sealing device T, when the film member F is attached to the apparatus, the film member F is sent in advance for a required length by the sending mechanism 11, and the downstream side of the film member F is welded by the welding cutting mechanism 20. Keep the upstream side open. Note that the operation of the welding and cutting mechanism 20 at this time is performed in the same manner as the operation described later, and is not particularly described here.
And in this state, it sits on the valve seat 2 and drops manure inside. Thereby, since the downstream side of the film member F is sealed by welding, manure is accumulated in the film member F. Next, when dropping of urine is finished, an operation switch (not shown) is turned on. Thereby, the process by the process part S is performed.

  In detail, it demonstrates using the flowchart of control by the control part shown in FIG. 12 thru | or FIG. First, the basic operation will be described. As shown in FIG. 12, when the operation switch is turned on, the number of times the operation switch is turned on is counted and the delivery mechanism 11 is operated to move the film member F downward by a predetermined length. Send it out. Then, the welding cutting mechanism 20 is operated at a required position, and first, a “film clamping operation (S100)” in which the movable crimping bar 22 moves from the separation position Y to the holding position X is performed. “Film sandwiching synchronization operation (S200)” is performed. When the movable press-bonding bar 22 is positioned from the separation position Y to the holding position X, a “sealing operation (S300)” for performing welding and cutting of the film member F is performed. After the welding is finished, the movable crimping bar 22 moves from the holding position X to the separation position Y. First, the “film peeling operation (S400)” is performed by the peeling means 40, and then the movable crimping bar 22 is separated. A “home position returning operation (S500)” for further moving toward the position Y is performed. After that, the foreign object detection state is canceled to prepare for the next. In this embodiment, a micro switch (not shown) is provided in the machine frame 10 in order to detect that a foreign object or the like is caught between the movable crimp bar 22 and the fixed crimp bar 21. Is activated, the operation is stopped and a warning lamp or the like is lit to warn. The foreign object detection is performed every time the operation switch is turned on.

Next, each basic operation will be described in detail.
(1) “Film pinching operation (S100)”
Using the flowchart shown in FIG. 13, first, as shown in FIGS. 5A1 and 8A, in a state (S101) in which the movable pressure-bonding bar 22 is in the separation position Y (home position), a sensor (not shown) is shown. Thus, it is confirmed that the shutter 51 is in the covering position Q (shutter home position) (S101). When the shutter 51 is not in the covering position Q (S101 NO), the shutter 51 is driven to be positioned in the covering position Q (S102).
Then, as shown in FIG. 5 (A2), the feed motor 13 of the delivery mechanism 11 is operated to feed the film member F downward and stop it at a required position. Further, the drive motor 33 of the welding cutting mechanism 20 is operated to move the movable crimp bar 22 from the separation position Y toward the holding position X (S103). At this time, as shown in FIG. 10 (B1), the position sensor 81 confirms that the movable crimping bar 22 has moved in the vicinity of the separation position Y (S104), and confirms that the movement is normal and moves. Is continued (S105).

  Then, as shown in FIG. 10 (B1), when the position sensor 82 detects that the movable crimping bar 22 is located at the intermediate position P (middle position) (S106), the movable crimping bar 22 is stopped (S107). ). At this position, it is confirmed again that the shutter 51 is properly in the covering position Q by a sensor (not shown) (S108), and when the shutter 51 is not in the covering position Q (NO in S108), the shutter 51 is driven to be positioned in the covering position Q. (S109). In addition, a “synchronous feed third start flag” for “film pinching synchronization operation” of the tension adjusting means described later is turned on (S110).

At an intermediate position P of the movable crimping bar 22, as shown in FIGS. 5A3 and 10B2, the shutter drive unit 52 covers the shutter 51 and moves from the position Q to the exposure position R (shutter open). (S111).
The operation of the shutter mechanism 50 will be described in detail. As shown in FIG. 10 (B2), first, the lock mechanism 60 is unlocked slightly before the movable crimping bar 22 is located at the intermediate position P, and the shutter 51 is rotated. Movement is allowed. That is, the locking member 64 provided on the movable crimping bar 22 is latched to the hook member 62, whereby the hook member 62 moves together with the movable crimping bar 22, so that the hook member 62 is biased by the spring 63. It is moved in the non-engagement direction with the pin 61 against this. Then, when the movable crimping bar 22 is located at the intermediate position P, the electric motor 54 of the shutter drive unit 52 is operated to rotate through the transmission mechanism 65 as shown in FIGS. 5 (A3) and 10 (B2). The moving shaft 53 is rotated to move the shutter 51 from the cover position Q to the exposure position R. Therefore, the fixed crimp bar 21 provided with the heating element 23 is not exposed and the fixed crimp bar 21 provided with the heating element 23 does not move except when necessary. It is suppressed, and safety is improved. Further, since the rotation of the shutter 51 is locked by the lock mechanism 60, it is possible to prevent a situation in which the shutter drive unit 52 opens the shutter 51 when it is not necessary due to a malfunction or the like, thereby ensuring safety. become.

  When the shutter 51 is located at the exposure position R, the movable crimping bar 22 is moved again from the intermediate position P toward the holding position X (S112). As shown in FIG. 6 (A4) and FIG. 10 (B3), when the position sensor 83 detects that the movable crimping bar 22 has reached the contact position (end position) with the fixed crimping bar 21 (S113). ), The movable crimping bar 22 is further pushed and moved from the contact position to the fixed crimping bar 21 side, and is positioned at the holding position X (S114). As a result, the film member F is held between the movable crimping bar 22 and the fixed crimping bar 21.

  Further, when the movable crimping bar 22 reaches the holding position X, in the moving mechanism 42 of the peeling means 40, as shown in FIGS. The hook member 46 engages with the pin 44. In this case, as the movable crimping bar 22 moves toward the holding position X side, as shown in FIG. 8B, the pin 44 comes into contact with the tip of the hook member 46 formed with an inclination. When the hook member 46 gets over the pin 44 as shown in FIG. 8C, the pin 44 is pressed against the pin 44 against the biasing force of the spring 47 and rotated in the non-engagement direction. The hook member 46 is rotated in the engaging direction by the urging force of the spring 47 and is engaged with the pin 44. Thereby, the movable crimping bar 22 and the presser bar 41 jointly hold the downstream side from the welding portion Fa of the film member F.

(2) “Film sandwiching synchronization operation (S200)”
Further, while the movable crimping bar 22 moves from the separation position Y to the gripping position X through the intermediate position P, the “feed film synchronizing operation” in which the feed motor 13 of the delivery mechanism 11 operates to feed the film member F little by little. Is done. Next, this “film pinching synchronization operation” will be described.
When the position sensor 81 confirms that the movable crimping bar 22 has moved in the vicinity of the separation position Y as shown in FIG. 10B1 using the flowchart shown in FIG. 14 (S201), the feed motor of the delivery mechanism 11 13 is set in a standby state (synchronous feed waiting 1, S202). When a predetermined time has elapsed, the feed motor 13 is operated to slightly feed the film member F downward (synchronous feed 1, S203). Is set in a standby state (synchronous feed waiting 2, S204), and when a predetermined time elapses, the feed motor 13 is operated to slightly feed the film member F downward (synchronous feed 2, S205). Then, the control unit looks at the state of the above-mentioned “synchronous feed third start flag” (S206). When the “synchronous feed third start flag” is turned on (YES in S206), the controller resets it (S207), The feed motor 13 is set in a standby state (synchronous feed waiting 3, S208). When a predetermined time elapses, the feed motor 13 is operated to slightly feed the film member F downward (synchronous feed 3, S209). Thereby, in the movement process of the movable crimping bar 22, the film member F comes into contact with and is pulled toward the fixed crimping bar 21, so that the tension generated in the film member F increases as it is, and the film Although troubles such as expansion of the member F occur and adversely affect welding, as shown in FIGS. 5A3 and 6A4, the feed motor 13 of the delivery mechanism 11 is operated by the tension adjusting means. Since the film member F is fed out little by little, a situation in which the tension generated in the film member F is increased is prevented, and the movable crimping bar 21 has a central position in the longitudinal direction of the crimping bar main body 25 with respect to the support member 26. Since it is supported so as to be pivotable about the portion 27, it swings. Also in this respect, the distribution of tension generated in the film member F is made uniform, and Arm member F is extended, a situation adversely affect is prevented to a subsequent welding.

(3) “Seal operation (S300)”
When the movable crimping bar 22 is positioned from the separation position Y to the clamping position X, the film member F is welded and cut. That is, using the flowchart shown in FIG. 15, the operation of the heating element 23 is checked when the apparatus is connected to the power source. Here, before the heating element 23 generates heat again, the operation check of the heating element 23 is performed. And confirming the temperature. First, when this apparatus is connected to a power source, it is confirmed whether or not the operation of the heating element 23 has been confirmed (S301). If not (S301 NO), the operation of the heating element 23 is confirmed (S302). . Further, when the heating element 23 is heated too much, further heating becomes meaningless, and it is confirmed that the temperature is lowered to a predetermined temperature by a temperature sensor (not shown) (S303). When the temperature is appropriate (YES in S303), the temperature of the heating element 23 is recorded (S304), and the heating element 23 is energized to generate heat (S305). Then, when the welding temperature of the film member F is reached (S306), the temperature is maintained by feedback (S307), and if the required time is maintained, the energization to the heating element 23 is stopped (S308). As a result, the film member F is welded and cut, but the movable crimping bar 21 is supported such that the center position in the longitudinal direction of the crimping bar main body 25 is rotatable with respect to the support member 26 about the shaft portion 27. Therefore, since the film member F swings, the distribution of the tension generated in the film member F is made uniform, and the film member F is pressure-bonded, so that the welding is surely performed. Then, after the energization is stopped, monitoring to move to the next “film peeling operation” is performed (S306). This monitoring is performed by detecting that the welding part Fa reaches an appropriate temperature at which the welding part Fa is solidified to some extent, because if the welding part Fa of the film member F is melted too much, the peeling is hindered. Thereby, the film member F is welded and cut, and the sealed body M in which the contents W are sealed is generated. At this time, the downstream side of the film member F to be delivered next is welded simultaneously.

(4) "Film peeling operation (S400)"
As a result of the monitoring to move to the “film peeling operation”, when it is determined that the temperature is appropriate (YES in S309), the “film peeling operation” is performed.
This is realized by moving the movable crimping bar 22 from the holding position X to the intermediate position P. Specifically, using the flowchart shown in FIG. 16, the drive motor 33 is operated to move the movable crimping bar 22 from the separation position Y toward the intermediate position P (S401). When the position sensor 82 detects that the movable crimping bar 22 is located at the intermediate position P (middle position) (S402), the movable crimping bar 22 is stopped (S403).
When the movable crimping bar 22 moves from the separation position Y to the intermediate position P, the welding site Fa is peeled off from the fixed crimping bar 21 by the peeling means 40 as shown in FIG. 6 (A5). Specifically, as shown in FIG. 8 (d), in the moving mechanism 42 of the peeling means 40, the hook member 46 on the presser bar 41 side is engaged with the pin 44, so that the movable crimp bar 22 and the presser bar are engaged. 41 is in a state of holding the downstream side of the welded portion Fa of the film member F together, and therefore the sealing body M is held by the movable crimping bar 22 without detaching. When 22 moves from the gripping position X to the intermediate position P, the film member F moves to the intermediate position P side, whereby the welded portion Fa of the film member F is peeled off from the fixed pressure bonding bar 21. At this time, even if there is a cut portion of the welded portion Fa, it is thinly attached, so the welded portion on the upper side of the cut portion also moves. In this case, due to the movement of the movable press-bonding bar 22, the welding part Fa is separated from the heating element 23 to be exposed and cooled. For this reason, since the welding part Fa of the film member F is peeled off from the fixed crimping bar 21 with the heating element 23, the situation where the welding part Fa adheres to the fixed crimping bar 21 during the cooling process is prevented, and the welding part Fa is surely secured. Therefore, the sealing performance is improved.

Next, as shown in FIGS. 6A5 and 8D, at the intermediate position P of the movable crimping bar 22, the movable crimping bar 22 is stopped for a predetermined time (S404). Thereby, the welding site | part Fa of the film member F is cooled. Since the crimping part can be reliably cooled, the sealing performance can be further improved.
Then, the feed motor 13 of the delivery mechanism 11 is reversed to slightly return the film member F in the direction opposite to the delivery direction (S405). Thereby, since the welding site Fa on the downstream side for the film member F that accommodates the next stored item W located above the sealing body M is peeled off from one crimping bar with the cutting line as the boundary, The sealing body M can be reliably removed.

(5) “Home position return operation (S500)”
Thereafter, as shown in FIG. 6 (A6) and FIG. 7 (A7), the movable crimping bar 22 is returned to the separation position Y using the flowchart shown in FIG. 17 (S501). As a result, the sealing body M is detached from the movable crimp bar 22. Specifically, as shown in FIGS. 6A6 and 8E, when the movable crimping bar 22 moves from the intermediate position P to the separated position Y side, the hook member 46 is moved in the moving mechanism 42 of the peeling means 40. The protrusions 46 b provided on the frame abut against the locking members 49 provided on the machine frame 10, whereby the hook members 46 are rotated in the non-engagement direction of the pins 45 against the urging force of the springs 47. The engagement of the hook part 46 is released. By this release, as shown in FIGS. 7A and 8F, the presser bar 41 is returned to the position immediately below the fixed press-bonding bar 21 by the spring 43. Further, since the presser bar 41 is separated from the movable crimping bar 22, the downstream side is released from the welding part Fa of the film member F that the movable crimping bar 22 and the presser bar 41 jointly hold. The sealing body M is detached from the movable crimping bar 22 by its own weight, falls and is easily accommodated in the container 6.

  Then, when the movable pressure bar 22 moves to a predetermined position (S502), the shutter mechanism 50 moves the shutter 51 from the exposure position R to the cover position Q (shutter close) (S503). In this case, as shown in FIG. 7 (A7), referring also to FIG. 10, the electric motor 54 of the shutter drive unit 52 is operated to rotate the rotating shaft 53 via the transmission mechanism 55, thereby moving the shutter 51. The exposure position R is moved to the cover position Q. When the movable pressure bar 22 is further moved (S504), the shutter 51 is locked by the lock mechanism 60, and the shutter 51 cannot be rotated. That is, since the locking member 64 provided on the movable crimping bar 22 is separated from the hook member 62, the hook member 62 is moved in the engagement direction with the pin 61 by the biasing force of the spring 63, and the movable crimping bar 22 is moved. As the distance further increases, the hook member 62 engages with the pin 61. Therefore, the fixed crimp bar 21 provided with the heating element 23 is not exposed and the fixed crimp bar 21 provided with the heating element 23 does not move except when necessary. It is suppressed, and safety is improved. Further, since the rotation of the shutter 51 is locked by the lock mechanism 60, it is possible to prevent a situation in which the shutter drive unit 52 opens the shutter 51 when it is not necessary due to a malfunction or the like, thereby ensuring safety. become.

  Then, when the movable pressure bar 22 further moves and detects that the position sensor 81 is located at the separation position Y, the drive motor 33 is stopped and the movable pressure bar 22 is moved as shown in FIG. It is stopped (S506). At this separated position Y, the position is confirmed again (S507), the remaining amount of the film member F accommodated in the accommodating portion 4 is detected by a known means (S508), and the remaining amount cannot accommodate the accommodated item W. When the amount is equal to the amount, the delivery mechanism 11 discharges the entire remaining amount (S509), prompts the next film member F to be mounted, and when the remaining amount is an amount that can accommodate the contents W, the delivery mechanism. 11 to send a predetermined amount (S510) to prepare for the next. As described above, after each excretion, manure (excrement) can be packaged in the sealed body M, stored in the container, and can be treated hygienically.

  Next, in this apparatus, as shown in FIG. 11, the case where the wire 32 is cut by the drive motor 33 of the crimp bar driving unit 30 will be described. As shown in FIG. 11 (C1), in the drive motor 33, the tip of the wire 32 is normally attached to the wire attachment portion 74 of the lever 72 of the stop mechanism 70, so that the lever 72 is subjected to the urging force of the spring 73. Therefore, when the wire 32 is wound, the movable crimping bar 22 is pulled against the traction force of the traction mechanism 31 to move to the separation position Y, and the wire 32 is pulled. Is extended, the movable crimping bar 22 is pulled by the pulling force of the conston spring 34 of the pulling mechanism 31 and moved to the holding position X.

  Then, as shown in FIG. 11C2, in the winding state of the wire 32, if the wire 32 is cut, the lever 72 of the stop mechanism 70 cannot be pulled by the wire 32. 72 is rotated by the urging force of the spring 73 and is positioned at the protruding position J. Further, when the wire 32 is cut, only the traction force of the conston spring 34 of the traction mechanism 31 acts on the movable crimping bar 22, so that the movable crimping bar 22 is pulled and moved to the holding position X side, and the shutter 51 or fixed. It tries to collide with the crimping bar 21. However, as shown in FIG. 11 (C3), since the lever 72 protrudes from the movable crimping bar 22 at the protruding position J, the lever 72 moves to the stop member 75 provided in the machine frame 10 during the moving process. This stops and the movable crimping bar 22 is thereby stopped. Therefore, the situation where the movable crimping bar 22 collides with the shutter 51 and the stationary crimping bar 21 and is damaged is prevented, and safety is further improved.

  In the above embodiment, the present invention is applied to a portable toilet. However, the present invention is not necessarily limited to this. For example, garbage such as kitchen, waste in various places, or food, clothing, etc. Of course, the present invention may be applied to an apparatus for sealing various articles. In short, the present invention is not limited by the type of container W to be sealed.

It is a sectional view showing the whole sealing device concerning an embodiment of the invention. It is the perspective view which looked at the process part of the sealing device which concerns on embodiment of this invention from the bottom. It is another perspective view which looked at the process part of the sealing device which concerns on embodiment of this invention from the bottom. The fixed crimp bar and movable crimp bar of the sealing device concerning an embodiment of the invention are shown, (a) is a top view and (b) is a side sectional view of a movable crimp bar. It is sectional drawing of the process part of the sealing device which concerns on embodiment of this invention, and is a figure which shows the process at the time of sealing body preparation. It is sectional drawing of the process part of the sealing device which concerns on embodiment of this invention, and is a figure which shows the process at the time of sealing body preparation. It is sectional drawing of the process part of the sealing device which concerns on embodiment of this invention, and is a figure which shows the process at the time of sealing body preparation. It is a figure which shows a peeling means with the effect | action in the process part of the sealing device which concerns on embodiment of this invention. It is a perspective view which shows the structure of the presser bar of the peeling means in the process part of the sealing device which concerns on embodiment of this invention. It is a figure which shows the structure of a shutter mechanism with the effect | action in the process part of the sealing device which concerns on embodiment of this invention. It is a figure which shows the structure of a stop mechanism with the effect | action in the process part of the sealing device which concerns on embodiment of this invention. It is a flowchart which shows the basic control of the sealing device which concerns on embodiment of this invention. 5 is a flowchart showing a control procedure of “film pinching operation” in the sealing device according to the embodiment of the present invention. 5 is a flowchart showing a control procedure of “film pinching synchronization operation” in the sealing device according to the embodiment of the present invention. 5 is a flowchart showing a control procedure of “sealing operation” in the sealing device according to the embodiment of the present invention. 6 is a flowchart showing a control procedure of “film peeling operation” in the sealing device according to the embodiment of the present invention. 6 is a flowchart showing a control procedure of “returning operation of the movable crimp bar” in the sealing device according to the embodiment of the present invention. It is sectional drawing which shows an example of the conventional sealing device.

Explanation of symbols

T sealing device W contents F film member Fa welding part M sealing body 1 base 2 valve seat 3 guide member 3a opening 3b outlet 4 accommodating part 5 lid 6 container S processing part 10 machine frame 11 sending mechanism 12 roller 13 feed motor 20 welding Cutting mechanism 21 Fixed crimping bar 22 Movable crimping bar X Holding position Y Separating position 23 Heating element 24 Projection strip 25 Crimping bar main body 25a Crimping member 25b Mounting member 26 Support member 27 Shaft part 28 Holding member 29 Rail 30 Crimping bar drive part 31 Towing Mechanism 32 Wire 33 Drive motor 34 Conston spring 35 Reel 40 Peeling means 41 Presser bar 42 Moving mechanism 43 Spring 44 Pin (engaging portion)
45 Rotating shaft 46 Hook member (engaged part)
47 Spring 48 Stopper 49 Locking member 50 Shutter mechanism 51 Shutter 52 Shutter drive section 53 Rotating shaft Q Cover position R Exposed position 54 Electric motor 55 Transmission mechanism 60 Lock mechanism 61 Pin (engagement section)
62 Hook member (engaged part)
63 Spring 64 Locking member 70 Stop mechanism 71 Rotating shaft 72 Lever 73 Spring 74 Wire attachment part 75 Stopping member 81, 82, 83 Position sensor P Intermediate position

Claims (6)

A feeding mechanism for feeding a cylindrical resin film member along its longitudinal direction; and a welding cutting mechanism for welding and cutting the fed film member along a direction perpendicular to the longitudinal direction, By the welding and cutting mechanism, the downstream side of the film member is first welded, and the contents are put inside with the upstream side opened, and then the upstream side of the film member is welded and cut, In a sealing device for creating a sealed body,
The welding and cutting mechanism is provided on one side of the film member to be sent out and fixed on the film member and can be crimped to the film member, and moved on the other side of the film member to be sent out and crimped to the film member. A movable crimping bar positioned at two positions: a clamping position for clamping the film member in cooperation with the fixed crimping bar; and a spaced position spaced apart from the fixed crimping bar by a predetermined distance; and a crimping bar for moving and driving the movable crimping bar Comprising a drive unit and a heating element that is provided on the fixed pressure bonding bar and welds the film member at the time of holding;
When the movable crimp bar moves from the separated position to the holding position, the crimp surface of the fixed crimp bar is exposed at a predetermined position, and when the movable crimp bar moves from the clamp position to the separated position, the fixed crimp bar at the predetermined position. A sealing device comprising a shutter mechanism that covers a pressing surface of a bar.   A shutter that can move the shutter mechanism to two positions, a covering position that covers the crimping surface of the fixed crimping bar and an exposed position that exposes the crimping surface of the fixed crimping bar, and a shutter drive unit that moves and drives the shutter The sealing device according to claim 1, wherein the sealing device is provided.   The shutter is rotatably supported on a rotation shaft provided in parallel with the fixed pressure-bonding bar, and can be moved to the cover position and the exposure position by rotation of the rotation shaft. The sealing device according to claim 2.   The shutter is allowed to rotate at a predetermined position while the movable crimping bar is moving from the separation position to the holding position, and the shutter is rotated at a predetermined position while the movable crimping bar is moving from the holding position to the separation position. 4. A sealing device according to claim 3, further comprising a lock mechanism for disabling the function.   An engagement portion provided on the machine frame so that the lock mechanism can be moved to an engagement portion provided on the shutter, an engagement position engaged with the engagement portion, and a non-engagement position disengaged from the engagement portion. And a moving mechanism for moving the engaged portion in conjunction with the movement of the movable crimp bar.   The engaging portion is constituted by a pin having an axis in a direction orthogonal to the moving direction of the movable crimping bar, and the engaged portion is provided on the machine frame so as to be movable in the moving direction of the movable crimping bar. A hook member having a hook portion that engages with the pin, and a spring that urges the hook member in the engaging direction is provided, and the movable crimp bar is on the way to the clamping position. 6. The sealing device according to claim 5, further comprising a locking member that locks the hook member and presses the hook member in a non-engagement direction against an urging force of the spring.

Images