JPH044063A - Device for coating liquid material to inside surface of tubular container - Google Patents

Abstract

PURPOSE:To apply a uniform coating of the liquid material on the inside surfaces of tubular containers by fitting the tubular containers in a horizontally laid state into the screw grooves which are formed on a pair of screw bodies symmetrically to the center line and transporting the containers while rotating the containers, then spraying the liquid material to the inside surfaces of the tubular containers during the course of the transportation. CONSTITUTION:The above device consists of a screw feeder 1 consisting of a pair of the screw bodies 2L, 2R which are freely rotatably supported around parallel axial lines and a spray nozzle 5 for the liquid material disposed to face the side of the screw feeder 1. The screw grooves 3L, 3R which can be fitted with the tubular containers S are formed at the same pitch as each other on the outer peripheral surfaces of a pair of such screw bodies symmetrically to the center line in such a manner that the spiral directions thereof are reversed from each other. The bodies 2L, 2R are rotated in the directions opposite from each other while the tubular containers S are held imposed in the horizontally laid state in these screw grooves to transport the containers S while allowing the containers to rotate of themselves. The liquid material is sprayed to the inside surfaces of the containers S from the nozzle 5 during the course of such transportation. Consequently, the uniform application of the liquid material is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an apparatus for applying a liquid substance to the inner surface of a tubular container such as a blood collection container, which applies a liquid substance such as a coagulation accelerator to the inner surface of the tubular container. be.

(Prior Art) Conventionally, known devices for applying liquid to the inner surface of a tubular container include an impregnation method in which the liquid is injected into the tubular container and then sucked, and a method in which the liquid is sprayed and applied. A continuous type and an intermittent type (hatch type) have been proposed, respectively.

For example, a method is known in which a tubular container supported in an erect state is transported at a constant speed by a transport container, and a liquid material is sprayed and applied from a spray nozzle located above.

(Problem to be Solved by the Invention) However, in such a conventional technique, some of the sprayed liquid material scatters on the moving conveyor, and as time passes, There was a drawback that the entire circumference of the conveyor was contaminated with liquid, requiring maintenance and inspection. Moreover, if the tubular container is transported in an upright state, a liquid may accumulate at the bottom of the container, which also poses a problem in the quality of the product.

The present invention has been made in view of the problems of the prior art, and aims to prevent the accumulation of liquid by transporting a tubular container horizontally and spraying liquid during the transport process. In addition, the present invention provides an apparatus for applying a liquid substance to the inner surface of a tubular container, which reduces contamination caused by scattering of the liquid substance.

(Means for Solving the Problems) The present invention provides a screw feeder consisting of a pair of screw bodies rotatably supported on parallel axes, and a liquid feeder disposed opposite to the sides of the screw feeder. Screw grooves into which a tubular container can be fitted are formed symmetrically on the outer circumferential surface of the pair of screw bodies, each consisting of a spray nozzle, so that the screw grooves have the same pinch and the winding directions are opposite to each other. By rotating the screw bodies in opposite directions with the tubular container placed horizontally across these screw grooves, the tubular container is transported while rotating by itself, and during the transportation process, the tubular container is removed from the spray nozzle. It is characterized by being configured to spray a liquid substance onto the inner surface.

(Function) When a tubular container is carried horizontally onto a screw feeder consisting of a pair of screw bodies rotating in opposite directions, the tubular container is placed on the downstream side by the screw groove formed in the screw body. transported to. That is, the screw grooves formed on the outer circumferential surfaces of the pair of left and right screw bodies each have a depth and width into which the tubular container is fitted, and the winding directions are opposite to each other,
In addition, the tubular containers are symmetrical with the same pitch, and as a result, the tubular containers carried into the screw feeder are transported downstream in a horizontally fitted state across the screw grooves formed in each of the pair of screw bodies. Ru. On this occasion,
Due to the frictional force generated when the screw groove comes into contact with the tubular container, the tubular container is transported while rotating itself. In the process of transporting such a tubular container, when a liquid material is sprayed from a spray nozzle placed on the side of the screw feeder, the liquid material is uniformly applied to the entire inner surface of the tubular container being translated.

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

S is a tubular container, which is supplied horizontally to the screw feeder 1 by a rotary feeder (not shown) or the like. This screw feeder 1 includes a pair of rotatable screw bodies 2 arranged so that their rotational axes are parallel to each other on a plane substantially parallel to the floor surface.
It is composed of +1 and 2L. The outer diameter of one screw body 2L is the same as that of the other screw body 2L. As a result, as is clear from FIG. 2, due to this difference in outer diameter, the tubular container S placed between the pair of screw bodies 21.2L is It is inclined upward to the left when viewed from the downstream side (right side in Figure 1).

Furthermore, these pair of screw bodies 2R.

2L, so that the tubular container S can be fitted horizontally,
A screw groove 3R13 having a semicircular cross section and a width approximately equal to the outer diameter of the tubular container S and a depth approximately half thereof is formed symmetrically. That is, one screw body 2R has a screw groove 311 formed in a clockwise winding direction, and the other screw body 2L has a screw groove 311 formed in a counterclockwise winding direction. Furthermore, these screw grooves 3. , 3L's pinch gradually decreases from its front end to its center,
On the other hand, from the center to the rear end, they are each formed to be the same so as to gradually increase in size. therefore,
In this way, screw groove 3. l.

Because the pitch of 3L changes, the distance traveled in one rotation is smallest at the center compared to the front and rear ends, and the pinch at this center is set approximately equal to the outer diameter of the tubular container S. ing.

As a result, the tubular containers S fitted horizontally across the symmetrical screw grooves 3-, 3L are transported so as to approach the preceding tubular container S until they reach the center, while , the preceding tubular containers S are transported so as to be separated from each other from the center to the rear end.

On the other hand, a spray nozzle 5 supported by a spray bracket 4 is opposed to the right side of the center part of the screw feeder 1, and this spray nozzle 5 has an atomizing air supply pipe 5a, a liquid material supply pipe 5b, and a spray nozzle 5. It is equipped with a working air supply pipe 5C so that liquid material can be sprayed. The center part of the screw feeder 1 facing this spray nozzle 5 is connected to the screw groove 3 as described above.
The pitch of R13 is the smallest, and as a result, the adjacent tubular containers S are translated in a state where they are almost in contact with each other.

Furthermore, guides 7.7 supported by guide brackets 6 are disposed on the upper left and right sides of the screw feeder 1, and are provided to prevent the tubular container S placed on the screw feeder 1 from falling during the conveyance process. ing.

Next, to explain the operation of the embodiment of the present invention, when the tubular container S is carried horizontally into the screw feeder 1 from a feeding device such as a rotary feeder (not shown),
Both ends thereof are regulated by guides 7.7 and are fitted across symmetrical screw grooves 3R3L formed in the pair of screw bodies 21, 2L constituting the screw feeder 1, respectively.

Here, the screw grooves 3. formed in the pair of screw bodies 2+t, 2t. , 3L are clockwise and counterclockwise, respectively, and are formed symmetrically with the same pitch, and furthermore, one screw body 2
Since the screw body 2L rotates in a clockwise direction toward the downstream side and the other screw body 2L rotates in a counterclockwise direction toward the downstream side, the screw body 2. ．． By the rotation of 2L, the tubular container S is gradually conveyed to the downstream side by the pitch formed in the screw grooves 3m and 3L.

At this time, since the pinch of the screw grooves 3A and 3L is formed to gradually decrease from the front end to the center, the tubular container S that is continuously supplied from the supply device is It is transported so as to approach the preceding tubular container S. Then, when reaching the center of the screw feeder 1, the adjacent tubular containers S... are translated in a state where they are almost in contact with each other.

As described above, since the spray nozzle 5 is spraying the liquid while facing the center of the screw feeder 1 where the plurality of tubular containers S... are translated while being almost in contact with each other, these translations are caused. A liquid substance is applied to the inner surface of the tubular container S. At this time, the tubular container S is inserted into the screw groove 3. ，
By being fitted into 3L and transported, it rotates by itself due to the contact friction and is transported downstream.
The liquid substance is uniformly applied to the entire inner circumference of the tubular container S.

Then, the tubular container S coated with the liquid material is moved so that the preceding tubular container S is gradually separated according to the pinch of the screw grooves 31I and 3L, which are formed to gradually increase from the center position where the liquid material is applied to the rear end. It is transported to the downstream side. Then, it is carried out to the next process (not shown).

In addition, in this embodiment, a pair of screw bodies 2M.

2L with a difference in outer diameter and screw grooves formed therein3. ．． Although the tubular container S fitted between the screw bodies 2 and 3L is configured to be slightly inclined, the screw bodies 2 having the same outer diameter
−． 2L can be arranged so that its axis line has a slight step difference, so that the tubular container S can be made to be slightly inclined. Even with this change, there is no difference in the effect of efficiently applying the liquid material in combination with the spray direction of the liquid material sprayed from the spray nozzle 5.

In addition, in this embodiment, by changing the pitch of the screw grooves 3R and 3L, the liquid material is sprayed during the process in which the plurality of tubular containers S... are translated while almost in contact with each other. It is possible to reduce as much as possible the amount of liquid that is scattered other than being applied to the tubular container S, and there is no need to interrupt its supply. It is possible to use even a liquid material that has a property of clogging the spray nozzle 5 depending on the spray.

(Effects of the Invention) As described above, in the present invention, the tubular container is conveyed by being fitted horizontally into the screw grooves formed symmetrically in the pair of screw bodies constituting the screw feeder. By configuring the system so that the liquid is sprayed from the spray nozzle during the conveyance process and applied to the inner surface, only specific parts of the screw feeder are contaminated by the scattering of the liquid, making maintenance and inspection easy. In addition, since the tubular container is transported while rotating itself during the transportation process, there is an advantage that the liquid is uniformly applied to the entire inner surface of the tubular container and at the same time, no pooling of liquid occurs.

[Brief explanation of the drawing]

The drawings illustrate an apparatus for applying a liquid substance to the inner surface of a tubular container according to the present invention, and FIG. 1 is an overall plan view thereof, and FIG. 2 is a partially omitted front view from the downstream side. 1... Screw feeder 2... Screw body 3... Screw groove 5...
・Spray nozzle 7...Guide S...Tubular container

Claims (1)

[Claims] 1) A screw feeder consisting of a pair of screw bodies rotatably supported on parallel axes, and a liquid spray nozzle disposed opposite to the side of the screw feeder; Screw grooves into which the tubular container can be fitted are formed symmetrically on the outer circumferential surface of the housing with the same pitch and winding direction in opposite directions. By rotating the screw bodies in opposite directions while placed on a table, the tubular container is transported while rotating itself, and during the transportation process, a liquid substance is sprayed from the spray nozzle onto the inner surface of the tubular container. A device for applying a liquid substance to the inner surface of a tubular container.