JPH01254519A - Shrink packing method - Google Patents

Abstract

PURPOSE:To simplify an apparatus by a method wherein an article having a heat-shrinkable tube mounted thereon is placed on a conveyor, which has rollers moving in a high temp. atmosphere while rotating, in a lying state and the heat-shrinkable tube is shrunk under heating while said article is rotated. CONSTITUTION:A bottle(b) is supplied to the index table 21 of a tube mounting apparatus 2 at a position A and held by a holding chuck 22 to be intermittently sent from the position A to a position D. When the bottle(b) reaches a position B, a tube(t) is mounted to the outside of the bottle(b) and the bottle(b) is positioned at the almost center of the tube at the position D to be grasped by the transfer chuck 48 of a transfer apparatus 4. Then, the bottle(b) is sent to a conveyor 6 along with the tube(t) mounted to the outer periphery thereof by the movement of a slider in the direction shown by an arrow V to be placed on the rollers 62 of the conveyor 6 in a lying state. When the bottle(b) is moved toward a heating oven by the movement of an endless chain, the rollers 62 rotate and the bottle(b) is rotated on the rollers 82 and passed through the heating oven 7 while rotating to be heated. Therefore, the tube(t) is shrunk.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a shrink packaging method, and more specifically, the present invention relates to a shrink packaging method, and more particularly, the present invention relates to a shrink packaging method for shrink packaging, and more specifically, a heat shrink wrapper that is attached to the outer periphery of an item such as a bottle that has a circular cross section or a shape close to a circular cross section while lying down. The present invention relates to a shrink packaging method in which a sex tube is heated.

(b) Prior art The so-called shrink packaging method, in which a heat-shrinkable tube indicating the quality of the contents inside the container is attached to the outer periphery of a container such as a bottle, and the heat-shrinkable tube is heated and shrunk has been known for a long time. ing. It is preferable for containers to be wrapped by such a shrink wrapping method to be covered with a tube to the bottom and top, especially for easily breakable containers such as glass bottles. U.S. Pat.

However, in this device, a large number of packets each having a push-up member are provided on the packet conveyor, and the push-up member is pushed up by a cam.In addition, a presser conveyor is placed inside the heating furnace to hold down the top of the container in order to keep the container stable on the conveyor. Since it is installed through the casing, the structure is complicated and the cost is high. Furthermore, since the conveyor having the push-up member and the presser conveyor are heated through a heating furnace, there is also a problem in terms of the lifespan of the device.

(c) Problems to be Solved by the Invention The problems to be solved by the present invention are to solve the following problems: An article to which a heat-shrinkable tube is attached is placed on a conveyor having rollers that rotate and move in a high-temperature atmosphere. The purpose of this method is to perform shrink wrapping by heating and shrinking a heat-shrinkable tube without rotating the product in that state, thereby simplifying the apparatus.

(d) Means for Solving the Problems In order to solve the above problems, the present invention attaches a heat-shrinkable tube to the outer periphery of an article, and passes the article covered with the heat-shrinkable tube through a high-temperature atmosphere to remove the heat. In a shrink packaging method in which a shrinkable tube is heat-shrinked, the heat-shrinkable tube is attached to the article while the article is in an upright position, and the article with the heat-shrinkable tube attached is rotated by itself in the high-temperature atmosphere. The article is placed in a lying state on a roller conveyor having a large number of moving rollers, and the article is configured to be rotated by the rotation of the rollers.

(b) Function In the present invention, an article equipped with a heat-shrinkable tube is placed in a lying state on a self-rotating roller, and in that state, it is passed through a high-temperature atmosphere to be heated while being rotated. Therefore, if you position the item in advance so that it is in the center of the tube when placing it on the conveyor, there will be no misalignment even if you do not specifically position the item with respect to the tube when transferring it on the conveyor. .

(c) Example Embodiments of the present invention will be described below with reference to the drawings.

1 to 4, an apparatus 1 for carrying out the shrink-wrapping method of the present invention is shown. This device 1
is equipped with a mounting device 2 for mounting a heat-shrinkable tube (hereinafter referred to as a tube) t onto an article, that is, a bottle b, a device 4 for transferring the bottle b to a conveyor 6, and a heating furnace 7 provided in the middle of the conveyor 6. There is.

The tube mounting device 2 includes an index table 21 that rotates intermittently in the direction of arrow U every 90'', and holding chucks 22 provided on the index table 21 at equal intervals in the circumferential direction. pair of claws 2
3, so that the bottle b supplied onto the index table 21 is held therebetween.

The tube mounting device 2 includes a stopper 25 disposed above the index table 21 at position D (in FIG. 1) in addition to a tube feeding device (not shown) having a known structure.
and a button 26 arranged below the index table 21.

In this tube mounting device 2, when the bottle b on the index table 21 supplied at position fA comes to position B, the holding chuck opens and the tube feeding device 2
A tube is sent from there and installed. After the tube is attached, it is held by the holding chuck 22 again and when it reaches position RL and stops, the stopper 25 is first lowered by a cylinder or the like and presses the upper end of the tube L. Next, when the chuck is opened, the button 26 rises and pushes up only the bottle t, bringing the bottle to a position approximately in the middle of the tube 7.

The transfer device 4 includes a guide rail 41 placed across above the conveyor 6, a slider 42 movably supported by the guide rail 41, and a shaft 43 rotatably supported by the slider 42 at right angles to the guide rail. , an arm 44 fixed to one end (lower end in FIG. 1) of a shaft 43;
A roller 45 attached to the tip of the shaft 4, a cam 46 disposed parallel to the guide rod 41 and adapted to engage with the roller 45, and a cam 46 attached to the other end of the shaft 43 are attached to a plate 47. has a transfer chuck 48 attached to a plate 47.

This transfer device 4 is at position ii on the index table 21.
After the bottle b is placed at the center of the tube t in &D, the bottle b is held together with the tube t at a position E by the pair of four claws of the transfer chuck 48. Then, the slider 42 moves in the direction of the arrow ■ in FIG.
Move up.

When the slider moves in this way, the cam 46 and the arm 4
4 causes the shaft 43 to move approximately 90 degrees in the direction of arrow W in FIG.
Rotate by ° and point the claw 49 downward. When the transfer chuck 48 comes to the position fiF of the conveyor 6, the claws are opened and the bottle b is placed on the conveyor 6.

The conveyor 6 includes a pair of endless chains 61 that are arranged parallel to each other and move in the direction of arrow X in FIG. A large number of rollers 62 are provided. The spacing between adjacent rollers 62 is such that a bottle b
It is wide enough to lay down.

At one end of each roller 62 (the right end in FIG. 2) there is a subblock I.
・A loop-shaped rotation chain 6 is attached to the sprocket as shown in Fig. 3.
It is multiplied by 4. The rotating chain 64 is fixed, and when the endless chain 61 moves in the direction of arrow X (FIG. 3), the sprocket 63 meshing with it rotates in the direction of arrow Z and moves together with the endless chain 61. Therefore, the bottle b, which is placed on two adjacent rollers and has the tube t attached to its outer periphery, rotates in the direction of the arrow.

Since the heating device 8 has a known structure, a detailed description thereof will be omitted.

Next, the overall operation will be explained.

First, bottle b is supplied onto index table 21 of tube mounting device 2 at position HA, rides on the index table, is held by holding chuck 22, and is intermittently sent from position A to position A. Bottle b is 1t
When reaching point B, the tube t is attached to the outside, and the bottle b is positioned approximately at the center of the tube, and in this state is gripped by the transfer chuck 48 of the transfer device 4.

The bottle b is held by the transfer chuck 48, and the tube t attached to its outer periphery is aligned with the arrow V (first
The paper is sent onto the conveyor 6 by movement in the direction shown in FIG.

The bottle b placed on the roller 62 of the conveyor 6 is
When the endless chain moves towards the heating furnace,
Since the roller 62 rotates, it rotates on the roller, and while rotating, it passes through the heating furnace and is heated. Therefore, the tube t contracts.

In the above embodiment, the roller is rotated by a sprocket and a fixed rotating chain, but a pinion may be attached to the roller and a rack that engages with the pinion may be provided near the heating furnace.

(l・) Effect In the present invention, items such as bottles are sent lying down, so
There is no need to provide a special device on the conveyor for holding the tubes, the device is simple, there are few failures, and the tubes can be passed through the heating furnace in a stable state.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of an apparatus for carrying out the shrink packaging method of the present invention, Fig. 2 is a side view of the apparatus shown in Fig. 1, Fig. 3 is a diagram showing a mechanism for rotating the roller, and Fig. 4 is a transfer FIG. 2 is a perspective view of the device. 2: Tube mounting device 4: Transfer device 6: Conveyor 61: Endless chain 62: Roller 8; Heating furnace patent applicant CKD Co., Ltd. (4 others) C0 tail 4 concave

Claims (1)

[Claims] In a shrink packaging method, a heat-shrinkable tube is attached to the outer circumference of an article, and the article covered with the heat-shrinkable tube is passed through a high-temperature atmosphere to heat-shrink the heat-shrinkable tube. The tube is installed while the item is in an upright position, and the item with the heat-shrinkable tube is placed in a lying position on a roller conveyor having a large number of rollers that move while rotating themselves in the high-temperature atmosphere;
A shrink packaging method characterized by rotating the article by rotating the roller.