JPH0447043Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The invention involves cutting a tube-shaped film wrapped around trays containing products between each tray, and cutting the ends of the cut film between the trays. This invention relates to a device that can be bent downward.

More specifically, a stretch film is wrapped around a plastic tray containing products such as fish, meat, vegetables, etc., the film is cut between the front and rear trays, and the two ends of the film are cut. This is a device that simultaneously bends the bottom of both trays.

(Prior art) Conventionally, Japanese Patent Publication No. 56-10256 discloses a method in which a large number of trays covered with cylindrical films are intermittently conveyed at equal intervals and at intervals equal to the interval between the front and rear trays, and then the trays stop. While doing so, cut the gap between the front and rear trays, and at the same time insert the two ends of the film into the gap between the lower roller conveyors using a pushing member. A foldable version is provided.

(Problems to be solved by the invention) Since it was necessary to push the end of the film deeply into the ground using a pushing member, the tray transport and roller conveyor were operated intermittently. However, this had the drawback of inefficiency.

In view of the above points, it is an object of the present invention to provide a device that can transport trays and continuously operate a roller conveyor while using a pushing member to perform highly efficient packaging.

(Means for solving the problem) In order to achieve the above object, the present invention has a continuous cylindrical film F, in which a large number of trays T arranged at equal intervals are sandwiched together with the film from both sides. A pair of vertically long bars 14, 14 for fixing both ends of the horizontally arranged cutlery 10 are provided in the middle of a pair of side belts 12, 12, which carry out a continuous conveyance action. Attach the intermediate parts of the levers 17, 17 to the upper ends of the materials, respectively, with the pins 16, 16.
The levers are pivoted to swing vertically through the levers, and elongated holes 20, 20 and pins 21, 2 are provided at the inner ends of these levers.
1 and supports the bracket 23 via
A pushing member 24 is pivotally supported by a pin 25 at the rear end of the bracket 23 in the direction of travel of the tray, and further, the swinging of the pushing member in the direction of tray travel about the pin is elastically restricted by a spring. While the pushing member is normally suspended vertically, the outer ends of the levers 17, 17 are held by springs 18, 18, and the cams 1 on both sides are
9 and 19, these cams are formed so that the width becomes narrower toward the bottom, and a wind tunnel 2 for film suction is provided in front of the tooth rest 11 provided in the lower area of the blade.
7 with its suction port 28 facing upward,
Chains 29, 29 on both sides are attached to the rear end of the tooth receiver 11.
A roller conveyor 32 formed by providing a large number of rod-shaped rollers 30, 30 between them is provided to continuously rotate at a higher speed than the tray, and the pushing member 24 is inserted into a gap 31 formed between the rollers. The two rods 14, 14 are configured to move downward so as to move downward.

(Operation) The blade is lowered with the movement of the tray by holding the bars on both sides, and cuts the film with the blade holder.
The trays are conveyed continuously, and the film is cut between the front and rear trays. In this case, the lever pivotally connected to the upper ends of both bars receives cam pressure from both sides as the bars descend, so the pushing member engaged with its inner end descends at a slightly higher speed than the cutter and removes the film. into the gap of the roller conveyor. The edges of the film are therefore pushed deep into the gaps of the roller conveyor. On the other hand, since the roller conveyor is continuously rotating, it comes into contact with the pushing member that has been pushed deeply into the gap, but since the upper end of the pushing member is pivoted on a bracket, it returns to its original position while rotating. As a result, the side belts and roller conveyor can simultaneously fold two ends of the film onto the underside of the tray even though they are continuously rotating.

(Embodiment) As shown in FIG. 1, a cutting mechanism is formed by an upper blade 10 and a lower blade holder 11, and as shown in FIGS. Belts 12, 12, 13, and 13 are provided, and the tray T is held between these side belts and conveyed continuously. Screws 15, 15 are attached to the rods 14, 14 which are erected on both sides of the cutter 10.
At the same time, levers 17, 17 are attached to the upper ends of both bars 14, 14 via pins 16, 16, respectively.
The cam 1 is pivotably supported, and the outer ends of the levers 17, 17 are supported by coil springs 18, 18.
9, 19, while touching both levers 17, 1.
Elongated holes 20, 20 are formed at the inner ends of the main members 7, respectively, and a main member 22 is connected to these elongated holes via pins 21, 21, and a bracket 23 provided on the main member is connected to the main member 22.
The upper end of the pushing member 24 is pivotally attached 25 to the rear end. Further, the distance between the cams 19, 19 is small on the lower side, so when both bars 14, 14 are pulled in the directions A, A of the arrow by mechanical force, the cutter 10 and the pusher 24 move downward, especially By pushing the outer ends of the levers 17, 17 inward by the cams 19, 19, the levers 17, 17 are rotated, and the main members 22 engaged with the elongated holes 20, 20 at their inner ends are rotated.
is lowered significantly, causing the pushing member 24 to move downward significantly.

On the other hand, the tray T is covered with a tube-shaped film F, so that the film F is cut by the lowering of the cutter 10, and the cut end _F1 of the film at the front end of the tray T is placed in front of the blade holder 11. Wind tunnel 2 installed in
The liquid is sucked into the suction port 28 of No. 7. Note that the wind tunnel is connected to a vacuum source.

Furthermore, behind the blade holder 11 are chains 29 on both sides,
A large number of rod-shaped rollers 30, 30... are rotatably supported on the roller conveyor 3 by forming a large clearance hole 31 between the rollers at one location.
2, the roller conveyor 32 is moved at a higher speed than the transport speed of the tray T, and the pushing member 24 is inserted into the gap hole 31 every rotation.
The end _F1 of the film cut on the front side of the rear tray is sucked into the wind tunnel 27 and folded into the tray T by the conveying force of the tray T, while being cut on the rear side of the front tray T. The end F ₂ of the film thus formed is pushed into the gap 31 of the roller conveyor 32 by the pushing member 24, and pushed into the lower surface of the tray T by the roller conveyor 32. Moreover, the pushing member 24 is suspended by a spring 35, and the roller 30 is suspended from the pushing member 24 as shown in FIG.
Rotate while bouncing off 4.

(Effects) In the present invention, the pushing member 24 is restrained by a spring 35, and when the pushing member 24 is kicked by the roller 30 of the roller conveyor 32, the pushing member 24 rotates while stretching the spring 35. From, side belt 1
2, 12 and the roller conveyor 32 are continuously rotated, the film can be bent, which has the effect of improving efficiency compared to the conventional intermittent operation type.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing an embodiment of the present invention, FIGS. 2 and 3 are explanatory diagrams of the operation of the previous figure, FIG. 4 is a front view of the previous figure, and FIG. 5 is a plan view of the same. 10...Knife, 11...Blade holder, 12,13...
Side belt, 14...bar, 17...lever,
18...Spring, 19...Cam, 20...Elongated hole, 23...Bracket, 24...Pushing member,
27... Wind tunnel, 34... Pushing member.

Claims (1)

[Scope of utility model registration request] A horizontal belt is placed in the middle of a pair of side belts 12, 12, which carry out a continuous conveying action by holding a large number of trays T arranged at equal intervals within a continuous cylindrical film F, integrally with the film from both sides. A pair of vertically long bars 14, 1 fixing both ends of the arranged cutlery 10
4 is provided vertically movably, and the intermediate portions of the levers 17, 17 are connected to the upper ends of the two rods, respectively, with pins 1.
A bracket 23 is supported at the inner ends of these levers via elongated holes 20, 20 and pins 21, 21. Push the member 24 into the rear end of the bracket 23 toward the pin 2.
The levers 17, 17 are pivotally supported by the levers 17, 17, and are pivoted by the levers 17, 17, which are pivotally supported by the levers 17, 17, and further elastically restrict the swinging of the pushing member in the tray advancing direction about the pin. The outer ends of the cams are pressed against the cams 19, 19 on both sides using springs 18, 18, and these cams are formed so that the width becomes narrower toward the bottom. A wind tunnel 27 for sucking the film is installed with its suction port 28 facing upward, and chains 27 on both sides are installed at the rear end of the tooth support 11.
A roller conveyor 32 formed by providing a large number of rod-shaped rollers 30 and 30 between the rollers 9 and 29 is provided to continuously rotate at a higher speed than the tray, and the pushing member 24 is inserted into the gap 31 formed between the rollers. A device for folding an end of a film placed on a tray, which is configured to move both bars 14, 14 downward so that a film is inserted into the tray.