JPH0454896Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a packaging device that stores a packaged item in a bag and heat-seals the opening of the bag.

[Prior Art] This type of packaging device is proposed, for example, in Utility Model Publication No. 58-45204 proposed by the same applicant, in which pre-weighed packages, such as mushrooms or similar materials, are fed into a hopper and placed under the hopper. The supply member is placed on a supply member that is movable forward and backward, and with the bag mouth open and supported by a suction tool in front of the supply member, the supply member is inserted into the bag via the bag mouth inner presser, and the supply member is moved back and forth. At the same time, the package is stored in the bag by a pushing member located on the supply member, and the bag containing the package is dropped onto the conveying member and moved, and the side edges of the bag are folded back and gently pressed. The air inside the bag is removed, and the opening of the bag is then heat-sealed before being carried out. In addition, the bag opening presser mechanism for adjusting the bag opening by using the bag opening presser is disclosed in Japanese Utility Model Publication No. 56-5523 by the same applicant, in which a pair of presser plates are mounted in a V-shape on a base plate by a pivot. The bag mouth presser is supported by an elastic device, and the bag mouth presser is provided with an elastic force so as to constantly close the tips of the presser plates.The bag mouth presser is movable back and forth by the operation of a cylinder, and the bag mouth presser is moved forward and supplied. The feeding member is guided into the bag opening opened by the suction tool by the rotation of the presser plate in conjunction with the forward movement of the member, and after the packaged item is stored in the bag, the bag containing the packaged item is The bag is dropped onto a conveying member, and then the inside of the bag is deaerated and the bag opening is heat-sealed.

[Problems to be solved by the invention] In the above-mentioned prior art, after the bag a is suspended as shown in FIG. 10A and the package b is stored in the bag a, as shown in FIG. 10B. When the bag a falls onto the conveying member c, the opening of the bag opens as shown in FIG. 10C due to the impact of the fall, etc.
As a result, the side edge d cannot be folded back by the folding member e as shown in FIG. It may not be possible to seal the entire bag opening. Also, the side edge d of bag a
When attempting to twist the opening of bag a using a twisting mechanism (not shown) without folding back the bag, the opening of the bag may be caught in the twisting mechanism with the mouth of the bag open. Even if you try to pinch it with your nails, the position of pinching the bag opening may not be stable, and the sealing mechanism may not be able to seal the bag opening properly in the next step.

Therefore, the present invention prevents the bag opening from opening when a bag containing a packaged item falls onto a conveying member, and allows the bag opening in the next process to be clamped at the appropriate position using a screw-in mechanism, thereby maintaining the sealed state. It is an object of the present invention to provide a packaging device that can be improved.

[Means for Solving the Problems] The present invention involves holding one side edge of a bag containing a packaged article with a pinching member, suspending the bag with the bag mouth sideways, and suspending the packaged article. In a packaging device that supplies a stored bag by dropping it onto a conveying member, removes the air inside the supplied bag, and heat-seals the bag opening after twisting the bag opening side of the bag. , the packaging device is provided with a fastener for fixing a part of the mouth of the bag at a position corresponding to the mouth of the bag suspended by the holding member.

[Function] With the above configuration, the mouth of the bag that falls onto the conveying member does not expand, and the air inside the bag is exhausted from the part other than the part where the mouth of the bag is fixed, and in this state, the bag's mouth is not clamped. and sealing is done.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

Figures 7 to 9 show an embodiment of the present invention using an enoki mushroom packaging device as an example. Air cylinders 2 and 2a are provided, and a bracket 4 is provided on a piston 3 of one of the air cylinders 2. The bracket 4 is provided along the longitudinal axis of the piston 3 with a supply member 5 consisting of an enoki mushroom mounting member 5a having a substantially semicircular cross section and a pair of lid members 5b. A pair of rails 6, 6a which are parallel on a plane are installed on the opposing members 1a, 1b of the frame 1, and the rails 6, 6a penetrate through the bracket 4 to support the piston of the cylinder 2 together with the supply member 5. It is formed to move forward and backward along with the movement of step 3. The bracket 4 is provided with a cam 7, and a switch 8 is fixed to a part of the frame 1 and forms a control means, corresponding to the cam 7 and operating in contact with the cam 7 when the bracket 4 moves backward. ing.

A pushing member 9 is attached to the piston 3a of the other cylinder 2a, extending above the enoki mushroom supplying member 5 and along its longitudinal axis. The pushing member 9 is attached with a guide rod 10 that extends above the piston 3a along its longitudinal axis and is pivotally supported by the opposing member 1a. It is formed to move forward and backward along the longitudinal axis of the enoki mushroom supplying member 5 together with the guide rod 10. A cam 7a is provided on the guide rod 10 so as to be movable and adjustable along its longitudinal axis, and a switch 8a is fixed to the opposing member 1a of the frame 1 and is actuated by contact with the cam 7a when the guide rod 10 moves forward. and forming other control means. Further, the switches 8 and 8a are formed to control the backward movement of the enoki mushroom supplying member 5 and the guide rod 10, as will be described later.

A bag opening presser 11 is attached to the opposing member 1b. In this case, the bag opening presser 11 has a pair of presser plates 13, 13a mounted on the base 12 with a pivot 14,
The holding plate 1 is rotatably supported by 14a.
3, 13a are arranged so that their tips are always closed by bullets 15, 15a, and the pivot 14 of the base 12,
A spring member 16 capable of holding the lower part of the bag mouth is provided between the parts 14a. A pair of suction tools 17 provided on the piston 3c of the air cylinder 2c are disposed in front of the bag opening presser 11.
When the bag 18 is not supplied to the holding plate 13,1
A sensor pin 19 is provided for stopping the device when 3a becomes conductive. The presser plate 13,1
Silicone rubber on the side of 3a that comes into contact with the bag 18,
An adhesive elastic material 20 such as synthetic rubber or composite rubber is provided at a location that does not interfere with the sensor pin 19. Guide members 21 and 21a that close the lid member 5b when the supply member 5 moves forward are disposed on the base 12;
A guide member 21b that closes when retracting is provided on the frame 1a.

Then, mushrooms to be packaged, such as enoki mushrooms, are put into the package from a hopper (not shown), and are supported by a substantially semicircular mounting member 5a that constitutes a part of the supply member 5. At this time, the pushing member 9 is located at the rear side of the enoki mushroom as an initial state. From this state, for example, the motor is rotated, and is driven in a well-known manner through a series of sequences based on electrical signals by a control means consisting of a group of cams that respond to the motor and a group of switches that operate in contact with the motor. That is, when the bag 18 suspended by the suction device 17 is opened by suction, the cylinders 2, 2
The pistons 3 and 3a of a move forward at the same time, and along with this, the enoki mushroom mounting member 5a that constitutes a part of the supply member 5 starts moving forward along the rails 6 and 6a together with the bracket 4 connected thereto. However, the pushing member 9 also moves forward together with the guide rod 10. When the forward movement of the enoki mushroom supplying member 5 further progresses,
The lid member 5b connected to this is connected to the base 1 at its front end.
A pair of planar V-shaped guide plates 21, 2 arranged at
1a and is urged toward the closing side along the inner surface thereof, thereby closing the space above the enoki mushroom mounting member 5a. Then supply member 5
When the carrier moves further forward, the holding members 13, 13a open outward against the elasticity of the bombs 15, 15a as the mounting member 5a moves forward, and the presser plates 13, 13a open outward from the inside of the bag 18, having penetrated deeply into the mouth of the bag 18. The supply member 5, which is shaped into a substantially cylindrical shape, enters the bag 18 within a certain range through the bag opening presser 11 at the mouth of the bag 18. The forward movement of the piston 3a continues, and as a result, the pushing member 9 presses the enoki mushroom on the mounting member 5a from the rear side into the bag 18, and stops within a certain range. At this time, the electric signal generated when the cam 7a of the guide rod 10 connected to the pushing member 9 contacts the switch 8a causes the piston 3 of the cylinder 2 to start moving backward, thereby causing the supply member 5 to move backward. During this backward movement of the supply member 5, the cover member 5b runs along the guide plate 21b, and is forcibly opened, returning to the initial state. At this time, the piston 3a of the cylinder 2a is in a stationary state, so that the enoki mushrooms are stuffed into the bag 18.
It is sent to the next packaging stage. That is, from the state indicated by the two-dot chain line in FIG. The conveying member 25 is degassed by the operation of the cylinder 26, and while being transferred to the cylinder location, the side edge 18b of the bag 18 is folded back by the movement of the folding member 27 as shown in FIG. 7B, and then the bag 18 is degassed. Sealing mechanism 2 consisting of deaeration by mechanism 28, heating element 29a and twisting part 29b
9 sealing is performed.

In this embodiment of the packaging apparatus constructed as described above, as particularly shown in FIGS. A fastening tool 30 is provided on the front side of the suction tool 17 to fasten a part of the opening 18a of the bag 18. This fastening tool 30 has a pair of left and right fastening members 32, 32a that move forward and backward in the left-right direction by cylinders 31, 31a, and one fastening member 32 has one protrusion 33,
The other fastening member 32a is provided with a fitting hole 34, respectively. 35 is a guide rod. The bag 18 is suspended by the holding members 23 and 23a.
After storing the enoki mushrooms 24 inside, the cylinder 3
1, 31a, the pair of fastening members 32,
The approximate center of the opening 18a of the bag 18 is crimped by the opening 32a, and due to the fitting between the protrusion 33 and the fitting hole 34, the approximately center of the opening 18a is partially overlapped as a spot-shaped fastening section 36. is fixed. In such a state, after the fastening device 30 is returned, the bag 18
Since the bag 18 is dropped onto the conveying member 25, the opening 18a of the bag 18 is held in a temporarily fixed state due to the falling collision, and the side edge 18b of the bag 18 is held as shown in FIG.
are well maintained in an overlapping state without spreading. Therefore, even if the bag 18 falls onto the conveying member 25, the opening 18a does not open, and the side edge 18b of the bag 18 does not widen as shown in FIGS. The protrusion and subsequent folding of the side edge 18b by the folding member 27 is performed well, and since a portion of the opening 18a is temporarily fixed, the air inside the bag can be degassed. It will not cause any inconvenience. Also the 6th
As shown in the figure, the mouth portion 18a is supplied to the sealing mechanism 29 in a proper state without being disturbed by the fastening portion 36, and a good sealing state is obtained.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the fastening members 32, 32a
The number, direction, size, etc. of the protrusions 33 and fitting holes 34 to be provided may be selected as appropriate. For example, the protrusions 33 and the fitting holes 34 may be arranged in two pairs as shown in FIG. 4A or in pairs as shown in FIG. 4B. They may be provided in three pairs, or a plurality of them may be provided vertically or diagonally as shown in FIG. 4C. Alternatively, the fastener 30 may be thermally welded using a pair of heating elements 37, 37a as shown in FIG. Also, the part where it is fixed is the mouth part 18.
The center side of a is preferable, but it may be provided on the upper or lower side so that the bag opening does not open when the bag is dropped. Further, the movable means of the fastening device is not limited to the cylinder, but may be appropriately selected such as a cam mechanism, and the overall structure of the packaging device can of course be adapted to various types.

[Effects of the invention] The present invention holds one side edge of a bag containing a packaged item with a pinching member, hangs it with the bag mouth sideways, and transports the bag containing this packaged item. In a packaging device in which a bag is dropped onto a member, air is removed from the supplied bag, and the bag opening is heat-sealed after the bag opening is twisted, the bag opening is heat-sealed. A fastener is provided at a position corresponding to the mouth of a bag that is hung, and that fixes a part of the mouth of the bag, so that when a bag containing a packaged item is dropped onto a conveying member. It is possible to provide a packaging device that can prevent the opening of the bag opening in the next process, enable the bag opening in the next process to be clamped at an appropriate position by a twisting mechanism, and improve the sealing state.

[Brief explanation of the drawing]

Figures 1 to 9 show embodiments of the present invention, with Figures 1 and 2 being perspective views, Figure 3 being a front view, and Figure 4 being a front view.
Figures A, B, C and Figure 5 are schematic explanatory diagrams showing other embodiments, Figure 6 is a perspective view, Figure 7 A, B is a front view showing the folded bag state, and Figure 8 is an overall plan view. , FIG. 9 is a front view of the same, and FIGS. 10A, B, C, and D are explanatory diagrams showing a conventional example. 5... Supply member, 9... Pushing member, 17... Adsorption tool, 18... Bag, 18a... Mouth part, 24... Enoki mushroom (packaged material), 30... Fixing tool.

Claims (1)

[Scope of utility model registration request] One side edge of the bag containing the packaged item is held by a holding member, and the bag is hung with the bag mouth sideways, and the bag containing the packaged item is dropped onto a conveying member and supplied. In this packaging device, the air inside the supplied bag is removed and the bag opening side of the bag is twisted, and then the bag opening is heat-sealed, and the bag is suspended by the clamping member. 1. A packaging device comprising a fastener for fastening a part of the mouth at a position corresponding to the mouth of the package.