JPS6313128Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a conveying device for a packaging machine.

Conventionally, there are various types of packaging machines that wrap items using film, but among these, one type of packaging machine spreads the film horizontally, pushes up the item from below toward the center of the film, and then folds the film. There is a package in which the surrounding film is folded into the bottom of the plate using a plate. In this type of packaging machine, a conveying device is provided above the push-up position to carry out the packaged items. This conveying device is composed of a belt, and also has the function of a holding device that temporarily holds down and stabilizes the object to be packaged which is pushed up during film folding.

To give an example of a conventional conveyance device, there is one in which the installation position is adjusted depending on the height of the packaged object, etc., and the conveyance device is fixed during use. This is because adjustments must be made every time the packaged items change.
It has extremely annoying drawbacks. In addition, another type is described in Japanese Utility Model Application Publication No. 56-10001. In this type, one end of the delivery belt body is rotatably attached, and the other end is received by a receiver urged upward by a spring. Therefore, it has the feature that the upper part of the pushing up part of the packaged object can be opened.
However, although the conveyor belt body is supported by a parallel link mechanism, one end is rotatably held in a fixed position, so when it moves up and down, if it exceeds a certain range, it will move in parallel. The problem is that it cannot be done.

The present invention has been made in consideration of the above points, and has as its object to provide a conveying device for a packaging machine which can move the relaxation belt vertically over a large range while maintaining it approximately horizontal.

This idea is to form a unit by attaching a relaxation belt and a motor that drives the relaxation belt to a supporting frame body, and attaching this supporting frame body to a vertical support while being biased by a biasing mechanism, and the material to be packaged. The movement of the relaxation belt, which is in a substantially horizontal state when it is pressed, is in a completely vertical state, and the structure is such that it can easily follow various changes in the height of the object to be packaged.

A first embodiment of this invention will be explained based on FIGS. 1 to 6. First, the overall structure will be explained with reference to FIG. A protruding part 2 is formed on the front surface of the main body case 1, and a carry-in device 4 is provided for feeding a product 3 to be packaged from the protruding part 2 to the middle part of the main body case 1. This loading device 4
A lift 5 that is connected to a drive unit (not shown) and moves up and down is provided at the tip. A plate-shaped stopper 6 is provided at the rear of the lift 5 in a fixed position, and a slide plate that reciprocates in the horizontal direction between the lower edge of the stopper 6 and the upper surface of the lift 5 at the lowest position. 7 is provided.

Next, at the rear of the main body case 1, there is a roll body holding section 1 which holds two roll bodies 9, each of which has a film 8 wound therein, in a vertically rotatable manner.
0 is provided, and the film 8 pulled out from the roll body 9 is guided by a plurality of guide rollers 11 and drawn into the main body case 1, and the leading end of the film 8 is held by a film holder 12. . Either of these two films 8 is selectively used.

Further, a support shaft 13 is provided below the film holding section 12, and a presser body 15 that presses the pulled out film 8 between it and a receiving plate 14 provided above is connected to the support shaft. A cutter 16 is rotatably provided on the support shaft 13 and is rotatably provided on the support shaft 13 for cutting the film 8 fixed between the presser body 15 and the film holder 12.

Next, a film feeder 17 is provided in substantially the same horizontal plane as the film holder 12 and is movable in a reciprocating manner, gripping the tip of the film 8 and drawing it out toward the hand. Film holding part 1 that serves as a film holding part to be held
8 is provided. The folding body 19 and the left and right folding bodies 20, which move horizontally reciprocating along the bottom surface of the product 3 which is pushed up while expanding the film 8 by the lift 5, are superimposed on each other, and the upper part of the folding body 19 and the left and right folding bodies 20 are provided with a packaged product. A relaxation belt 21 is provided which contacts the top surface of the product 3 and moves it backward, and a guide belt 22 is provided at the rear and lower part of the relaxation belt 21.
A transfer belt 23 is provided connected to the guide belt 22, and a heat seal plate 24 for heat sealing the folded film 8 is provided between the transfer belts 23. The packaged product 3 is placed at the rear end of such a transfer belt 23.
A roller 25 is provided that transfers the material to another mechanism.

An opening 26 is formed in the main body case 1 above the lift 5.
A column 27 is vertically fixed to the left edge of the column 6. This support 27 is an internally hollow cylindrical body, and a guide hole 28 of a predetermined length is formed on both sides.A pin 29 passing through the guide hole 28 has one end attached to the top of the support 27. It is connected to a spring 30 that serves as a biasing mechanism.

A supporting frame body 31 is attached to such a support column 27 so as to be able to move up and down while abutting the pin 29 on the lower surface thereof. That is, the support frame 31 is connected to the bracket 32.
This bracket 31 is provided with four rollers 33 connected to the support column 27, and a motor 34 is attached above. A frame 3 is attached to the end of the bracket 31.
5 is attached to the frame 35, and a pulley 3 is attached to this frame 35.
6 is installed. This pulley 36 and the motor 34 are connected by a timing belt 37. Next, a bar 38 is attached substantially horizontally to the tip of the frame 35, and a pulley 39 is attached to the tip of the bar 38. The relaxation belt 21 is stretched between this pulley 39 and the pulley 36. Although not particularly shown in the drawings, a plurality of relaxation belts 21 are provided in parallel.

In such a configuration, the general operation from when the product 3 is carried in, wrapped with the film 8, and carried out will be described first. Here, the products 3 are food items and the like stored in a tray with an upward opening, and the products 3 are sequentially fed onto a carry-in device 4 by an operator. The product 3 is sent onto the lift 5 by this carry-in device 4, but first, the slide plate 7 is moved onto the lift 5 as shown in FIG.
When the slide plate 7 is moved back as shown in FIG. 3, the product 3 is placed on the lift 5 with its position and direction determined by the stopper 6. be placed in place. At the same time, the film feeder 17 advances rearward at the timing shown in FIG.
At the timing shown in the figure, the film feeder 17 moves forward and feeds out the film 8, the film holder 18 grips both sides of the film 8, and the presser foot 15 rotates to hold the film 8 between it and the receiving plate 14. hold,
The cutter 16 operates to hold the film 8, and the cutter 16 operates to cut the film 8 to a predetermined size.

Next, as shown in FIG. 4, the lift 5 rises and pushes up the stretched film 8 from below to position the top surface of the product 3 directly below the relaxation belt 21, and the front folding body 19 moves backward and the left and right folding bodies move backward. At the same time, the film 20 is moved towards the center so that the front and side parts of the film 8 are folded onto the bottom of the product 3.
At this time, the film feeding body 17 and the left and right presser bodies 18
The grip on the film 8 has been released. When the folding body 19 and the left and right folding bodies 20 enter the lower part of the product 3 in this way, the product 3 is lifted above the upper surface of the lift 5, and the product 3
The upper surface of is joined to the relaxation belt 21. Therefore, as shown in FIG.
The rear part of the film 8 is folded into the bottom surface of the product 3 by the guide belt 22 and discharged onto the transfer belt 23 by the relaxation belt 21, and the folded film 8 is welded on the heat seal plate 24 and transported to the required position via the rollers 25. be done.

Therefore, as mentioned above, the product 3 pushed up by the lift 5 is joined to the relaxation belt 21 via the film 8, but since the relaxation belt 21 pushed up by the product 3 moves completely vertically,
It matches the movement of product 3 and does not apply any sideways force to product 3. Therefore, the folding of the film 8 is performed orderly and reliably.

Then, after the folding is completed, the motor 34 is started, the relaxation belt 21 is rotated, and the above-mentioned unloading operation is performed.

Next, a second embodiment of this invention will be described based on FIG. The same parts as in the previous embodiment are designated by the same reference numerals, and the description thereof will be omitted. In this embodiment, two rollers 40 are provided at the upper end of the support column 27, spaced apart from each other in a substantially horizontal direction, and one end of a wire 41 wound around these rollers 40 is fixed to the support frame 31. A weight 42 is fixed to the other end to form a biasing mechanism.

Further, a locking pin 43 is formed protruding from the side surface of the support frame 31, and a hook 44 that engages and disengages from the locking pin 43 is attached to the upper end of the support column 27. Further, when the support frame 31 rises to a position where it is locked by the hook 44, the switch 4 is pressed and switched by the support frame 31.
5 is provided.

In such a configuration, in a normal state, the support frame 31 is located far below the illustrated state, but the upward force of the biasing mechanism due to the weight 42 depends on how much the support frame 31 moves. Since the height is constant, the pressing force applied to the product 3 is constant.

When the user inserts his or her hand through the opening 26 to inspect or adjust the interior, the support frame 31 is held in the hand and moved upward to engage the locking pin 43 with the hook 44. As a result, the support frame 31 is locked upward, and the switch 45 is turned on at the same time. This switch 45 is connected to the part that controls the power supply and other power of the device, and as long as the support frame 31 is locked, the internal mechanism does not operate.
It is safe to insert your hand through the opening 26.

As mentioned above, this device uses a lift to push up the packaged item from below against the horizontally stretched film, folds the film, and wraps it. Since the support frame body to which the package is attached is urged upward by the biasing mechanism and is attached to the support column so as to be able to rise and fall freely, a constant pressure can be applied even if the size of the packaged item changes, and at this time Since the movement of the support frame is completely vertical, a stable state can be obtained when performing film folding, etc. Moreover, the overall structure is simple, and the relaxation belt can be driven in a constant state. It has the effect that it can be done.

[Brief explanation of the drawing]

Figures 1 to 5 are side views showing each state of the packaging process, Figure 6 is a side view of the main parts of the first embodiment of this invention, and Figure 7 is the second implementation of this invention. It is a side view which shows an example. 3...Product (packaged item), 5...Lift, 8...
... film, 21 ... relaxation belt, 26 ... opening, 27 ... pillar, 30 ... spring (biasing mechanism),
31... Support frame body, 34... Motor, 42... Weight (biasing mechanism).

Claims (1)

[Scope of utility model registration request] In a device in which an object to be packaged is pushed up from below by a lift with respect to a film stretched almost horizontally, and the object to be packaged is carried out to the side after being wrapped by the film, the device is formed above the lift. A support frame body in which a support is fixed vertically near the opening, and a relaxation belt extending almost horizontally on which the pushed-up object to be packaged is pressed and a motor for driving the relaxation belt are integrally attached. 1. A conveyance device for a packaging machine, characterized in that the supporting frame body is attached to the supporting column so as to be movable up and down, with the supporting frame being biased upward by a biasing mechanism while leaving a weight that moves the supporting frame downward.