JPH0524647Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a chain conveyor with empty container conveyance pins that conveys empty containers such as two-piece empty cans by engaging them with conveyance pins.

(Prior art) Conventionally, as a means of supporting and transporting empty cans after the external surface has been painted through a baking drying oven, a conveyor pin with a chip press-fitted at the tip is attached to a chain, as shown in Japanese Patent Publication No. 57-47086. A conveyor with equally spaced protruding pins is used.

Inside the drying oven, the empty cans engaged with the conveyor pins shake due to hot air and centrifugal force when the conveyor changes direction.
Abrasions from the chips are likely to occur on the inner surface of the can, and in severe cases, the container may become crushed and fall off the conveyor pins. In order to prevent the chips from falling off the conveyor pins, it is effective to increase the contact area between the inner surface of the can and the chips. However, in that case, there is a disadvantage that the number of scratches on the inner surface of the can increases.

(Problem to be solved by the invention) In recent years, with the increase in speed of can making lines, it has become necessary to transport cans through the drying oven at a high speed of 1,000 cans or more per minute. Therefore, especially for 350 ml cans with a large can diameter, there is a tendency for the above-mentioned can drop accidents to increase and the number of scratches on the inside of the can to increase. Therefore, we use large chips and winged conveyor pins.
It is possible to prevent the can from falling, but the contact area with the chips on the inside of the can becomes large.
The disadvantage is that the scratches become large. In particular, steel
In DI cans, that part turns black and looks unsightly, reducing the product value. Furthermore, in a high-temperature atmosphere such as inside a drying oven, the fit between the chip and the conveyor pin becomes loose due to thermal expansion, and with the conventional press-fitting method, the chip may not come out of the conveyor pin when the kneading phenomenon occurs as described above. It was hot.

The present invention is intended to eliminate the above-mentioned drawbacks of the conventional technology.It prevents large-diameter containers such as 350ml cans from falling off the pins even when transported at high speed, and prevents scratches caused by chips. It is an object of the present invention to provide a chain conveyor with empty container conveyor pins that can reduce the area and prevent chips from falling out from the conveyor pins.

(Means for Solving the Problems) The chain conveyor with empty container transport pins of the present invention solves the above problem by having transport pins protruding from one side of the chain at predetermined intervals, and connecting the transport pins with the inner surface of the can body. In a chain conveyor with an empty container conveyor pin, which is provided with an engaging tip and conveys an empty container by engaging and supporting the pin, the tip has a press-fitting support part for the conveying pin on one end side, and the other It consists of two pieces: a hollow cylindrical chip body with an open end, and an open end press-fit support whose outer periphery fits into the open end of the chip body, and the press-fit support part and the open end press-fit support At least one of the tip bodies has an engaging protrusion that fits into an engaging groove formed in the conveying pin, and is snapped onto the conveying pin, and the tip body is at least shorter than the can length. It has a cylindrical outer peripheral surface that is longer than 1/2 of its length, and its tip is formed into a slightly reverse tapered shape to form a large diameter part, and the large diameter part and the base are in contact with the inner surface of the container. This could be achieved by adopting a configuration characterized by supporting empty containers.

(Function) The tip transfers the can inserted into the conveying pin to the inner wall of the can body slightly away from the bottom of the inner surface of the can, and the two areas near the open end of the can body, at the tip and the proximal end of the tip body. Since the cans are supported by making contact at points and the outer diameter is relatively large, even relatively large diameter cans such as 350ml cans can be stably supported. Furthermore, since the area of contact between the chips and the inner surface of the can body is small, the area of scratches on the inner surface of the can body can be reduced dramatically compared to the conventional art.

Furthermore, since the tip is formed of two pieces and is press-fitted and supported by the pin at two locations, the distal end and the proximal end, the tip does not swing relative to the conveying pin. Further, since at least one press-fitting support portion of the chip is press-fitted into the conveying pin in a snap-type manner, the chip will not jump out from the conveying pin even if the chip shakes violently.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIGS. 1 and 2 show an embodiment in which a chain conveyor with empty container conveying pins according to the present invention is applied to a conveyor for conveying two-piece empty cans in a drying oven. In the figure, 1 is a chain, and a conveying pin 3 is formed by extending one end of a connecting pin at an appropriate interval. 4 is a chip that is press-fitted into the pin; 5 is a cross-shaped wing that is in contact with the base end of the chip and is fitted into the conveying pin 3;
6 is a spacer fitted between the wing and the chain. The tip 4 has a diameter of 1/4 or more and 2/3 or less of the diameter of the can c to be conveyed, and is formed to have a length shorter than the height of the top of the can bottom dome wall and the opening end and longer than 1/2 of the height, Press-fit support part 8 for the conveyor pin at the tip
It is composed of two pieces: a substantially cylindrical tip body 7 whose proximal end is open, and an open end press-fit support 9 that fits into the inner peripheral surface of the proximal end of the tip body. As shown in the figure, the distal end 10 of the tip body is slightly tapered in reverse and has a large diameter, and the tip contacts the inner circumferential surface of the can at two points, the distal end and the proximal end. Support the can. The length of the tip body 7 is preferably such that the tip touches the inner wall of the can body at a position slightly higher than the bottom surface of the can body, and the base end contacts the tapered part after netting the can body, and is preferably 350 ml. In the case of a can, the length L of the outer periphery of the tip body is 90 to 101 mm, and the length M of the protruding part of the press-fit support part (or press-fit support body) on the proximal side that protrudes from the base end of the outer periphery to the wing part is 10 to 101 mm. A range of 20mm is desirable.

A protrusion 12 is formed on the press-fit support portion 8 at the tip of the chip 3 and is fitted into an engagement groove 11 formed in the conveying pin 3, and is fitted onto the conveying pin 3 in a snap-like manner. Therefore, after being press-fitted, the chips cannot be easily removed from the conveyor pins even if they are expanded by hot air.

The present embodiment is constructed as described above, and the chain 1 is operated in the direction of the arrow shown in FIG. It runs through a drying oven while being exposed to hot air. The inner peripheral surface of the can inserted and locked onto the conveyor pin 3 engages only the outer periphery of the chips, and its open end contacts the wings, thereby restricting its movement toward the chain. Therefore, most of the tip diameter and the base end of the tip body contact the inner wall of the can body slightly away from the bottom of the inner surface of the can and at two points near the open end of the can body to support the can, Wings contact the open end of the can. Moreover, the diameter of the tip is 1/2 of the can body diameter.
Since the contact area in the circumferential direction is large, even relatively large diameter cans such as 350ml cans can be stably supported against the hot air in the drying oven. It is possible to reduce the swaying and twisting of the can, and prevent the can from falling. In addition, even though the can is stably supported, the contact area between the chips and the inner surface of the can body in the longitudinal direction of the can, which affects the area where rubbing scratches occur, is small, so the sliding scratches on the inner surface of the can body are small. The area of the marks can be dramatically reduced compared to the conventional method.

FIG. 2 shows another embodiment of the invention. In this embodiment, a press-fit support part 16 is formed at the proximal end of the tip body 15, and a separate open-end press-fit support 17 is press-fitted with the distal end being an open end. and,
The open end press-fit support 16 is press-fitted onto the conveying pin in the same manner as in the previous embodiment. The rest of the structure is the same as that of the previous embodiment, so the same reference numerals are used.

(Effects) Since the present invention is configured as described above,
It produces the following special effects.

Most of the tip diameter and the base end of the tip body come into contact with each other at a position slightly away from the bottom of the can on the inner peripheral surface of the can body and at a position near the open end of the can body to support the can.
Even relatively large diameter cans such as 350ml cans can be stably supported and can be prevented from falling. Furthermore, since the area of the contact portion between the chip and the inner circumferential surface of the can body is small, the area of scratches on the inner circumferential surface of the can body can be dramatically reduced compared to the conventional art.

Since the tip is formed of two pieces and is supported by being press-fitted onto the conveying pin at two places, the distal end and the proximal end, the tip will not shake even if it is made long. Further, since the chips are press-fitted into at least one of the conveying pins in a snap-type manner, the chips will not jump out from the conveying pins even if the chips are shaken violently.

[Brief explanation of the drawing]

The drawings show an embodiment of a chain conveyor with empty container conveying pins according to the present invention, with FIG. 1 being a partially sectional front view thereof, and FIG. 2 being a partially sectional front view of another embodiment. 1... Chain, 3... Conveyance pin, 4... Chip, 5... Wing, 6... Spacer, 7... Chip body, 8, 16... Press-fit support part, 9, 17...
...Open end press-fit support, 10...Tip main body tip.

Claims (1)

[Scope of utility model registration request] A chain conveyor with empty container transport pins in which transport pins are protruded from one side of the chain at predetermined intervals, the transport pins are provided with tips that engage with the inner surface of the can body, and the pins engage and support empty containers to transport them. In the above, the chip has a hollow cylindrical chip body having a press-fit support portion for the conveying pin at one end side and an open end at the other end, and an outer periphery of the chip body is fitted into the open end of the chip body. and an open-end press-fit support, at least one of the press-fit support and the open-end press-fit support having an engagement protrusion that fits into an engagement groove formed in the conveyance pin. , the tip body is fitted into the conveying pin in a snap-type manner, and the tip body has a cylindrical outer peripheral surface that is at least shorter than the can length and longer than 1/2 of the can length, and the tip portion thereof is formed into a slightly reverse tapered shape. A chain conveyor with empty container conveyor pins, characterized in that the tip has a large diameter portion, and the large diameter portion and the base contact the inner surface of the container to support the empty container.