JPH05337428A - Holder for cylindrical vessel and its production - Google Patents

Abstract

PURPOSE:To provide the holder for a cylindrical vessel which prevents the flawing of the inside surface of the cylindrical vessel, reduces the cost by facilitating the exchange in the case of wear and can hold the cylindrical vessel with high accuracy and the process for production of such holder. CONSTITUTION:The holder A for holding the cylindrical vessel X, such as can body, at the time of subjecting the outer peripheral surface of the cylindrical vessel to printing, coating, etc., is provided with a cylindrical base barrel 6 supported freely rotatably on a supporting shaft 1. A cylindrical holding member 7 made of a synthetic resin which is fitted and fixed freely attachably and detachably to the outer peripheral surface of the base barrel 6 and fits and holds the cylindrical vessel X is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holding device for a cylindrical container and a method for manufacturing the same, and more particularly, to a rotatable cylindrical container when printing or painting the outer peripheral surface of the cylindrical container such as a two-piece can body. And a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a holding device for rotatably holding a cylindrical container such as a two-piece can body when printing or painting the outer peripheral surface of the cylindrical container is disclosed in Japanese Patent Publication No. 60-10788. Things are known.

As shown in FIG. 2, this type of holding device B has a support shaft 20 fixed to the side surface of a spindle conveyor Y in a cantilevered manner, and bearings 21, 22 on the support shaft 20.
And a cylindrical sleeve 23 rotatably supported via the. The sleeve 23 has a cylindrical container X on its outer peripheral surface.
Is formed so as to be extrapolated, and therefore the sleeve 23
The outer diameter of is smaller than the inner diameter of the cylindrical container X. Further, the support shaft 20 is provided with suction holes 24 opened at both ends in the longitudinal direction. The suction hole 24 is formed by connecting a suction device (not shown) to the opening 25 on the spindle conveyor Y side of the support shaft 20 and opening 26 on the tip end side of the support shaft 20 when the cylindrical container X is inserted into the sleeve 23. Then, the bottom of the cylindrical container X is sucked, and the cylindrical container X is fixed while being inserted into the sleeve 23.

In this way, the holding device B holds the cylindrical container X in a state in which it is inserted and fixed in the rotatable sleeve 23, and the outer peripheral surface of the cylindrical container X is subjected to work such as printing and painting. Done.

By the way, the sleeve 23 is generally
The sleeve 23 is formed of a material such as metal or ceramic, but if the weight of the sleeve 23 is relatively heavy, the support shaft 20 supporting the sleeve 23 is cantilevered and fixed to the side surface of the spindle conveyor Y. However, a load is applied to the support shaft 20, and the durability of the support shaft 20 may be reduced.
Further, if the weight of the sleeve 23 is relatively heavy, the rotation of the sleeve 23 is difficult to start, which may reduce the accuracy of printing or painting on the outer peripheral surface of the cylindrical container X. Furthermore, if the material forming the sleeve 23 is relatively hard, there is a disadvantage that the inner surface of the cylindrical container X is damaged.

Further, since the sleeve 23 holds the cylindrical container X on its outer surface, the sleeve 23 is easily worn. If worn, the entire sleeve 23 must be replaced, which results in an increase in cost.

Therefore, it is conceivable that the sleeve 23 is made of a synthetic resin having high wear resistance such as nylon. Thereby, the weight of the sleeve 23 can be reduced.

However, when the sleeve 23 is made of synthetic resin, for example, a fixing member 27 such as a snap ring for maintaining the supporting state on the support shaft 20.
In order to provide the above, it is necessary to form the sleeve 23 to be relatively thick. Normally, when printing or painting the cylindrical container X, the cylindrical container X is heated to about 65 ° C., but the cylindrical container X is attached to the relatively thick synthetic resin sleeve 23 as described above. When the cylindrical container X is held and subjected to printing, painting, or the like, the thermal expansion of the sleeve 23 becomes remarkable due to the heating, and there is a possibility that the cylindrical container X cannot be inserted into or removed from the outer peripheral surface of the sleeve 23. Further, when the cylindrical container X is printed or painted, and the sleeve 23 is thermally expanded by being heated, the inner diameter of the sleeve 23 may be expanded.
As a result, the engagement state of the sleeve 23 by the fixing member 27 cannot be maintained and backlash occurs between the support shaft 20 and the sleeve 23, and the rotation accuracy of the sleeve 23 deteriorates when the cylindrical container X is held. There is an inconvenience that the accuracy of printing or painting on the cylindrical container X decreases.

[0009]

SUMMARY OF THE INVENTION The present invention solves the above inconvenience and prevents the inner surface of a cylindrical container from being scratched, and can be replaced easily when it is worn to reduce the cost. An object is to provide a holding device for a cylindrical container capable of holding the cylindrical container with high accuracy,
Furthermore, it is an object of the present invention to provide a method for manufacturing a holding device for a cylindrical container, which can easily manufacture this holding device.

[0010]

To achieve the above object, the apparatus of the present invention rotatably holds a cylindrical container such as a can body when printing or painting the outer peripheral surface of the cylindrical container. A holding device, which is rotatably supported by a support shaft, is provided with a cylindrical base body in which the cylindrical container is externally insertable, and is removably inserted and fixed to the outer peripheral surface of the base body, and the outer periphery thereof. And a cylindrical holding member made of synthetic resin for inserting and holding the cylindrical container on a surface thereof.

Further, the method of the present invention is a method of manufacturing a holding device for rotatably holding the cylindrical container when printing, painting or the like on the outer peripheral surface of the cylindrical container such as a can body, at a predetermined temperature. A step of processing the inner diameter of the synthetic resin cylindrical body soaked in hot water for a predetermined time to a smaller diameter than the outer diameter of the cylindrical base body in which the cylindrical container is externally insertable, and after the step A step of press-fitting and inserting the cylinder body immersed in hot water of a predetermined temperature for a predetermined time into the outer peripheral surface of the base body, and then cooling the cylinder body;
At this time, after the cylindrical body is fixed to the outer peripheral surface of the base body by the contracting force generated in the cylindrical body, the cylindrical body is processed into an outer diameter into which the cylindrical container can be inserted and formed into a holding member of the cylindrical container. And a step of rotatably supporting the base cylinder having the holding member inserted on the outer peripheral surface thereof on a support shaft.

[0012]

In the apparatus of the present invention, the holding member made of synthetic resin is provided by being inserted into the base cylinder, and the cylindrical container is inserted and held on the outer peripheral surface thereof. Therefore, for example, the base cylinder is made of metal or ceramic. Even if it is formed by, it is possible to reduce the total weight by the amount of the holding member made of synthetic resin. Further, by holding the cylindrical container by the holding member made of synthetic resin, it is possible to prevent the inner surface of the cylindrical container from being damaged.

Further, since the holding member inserted and fixed to the base cylinder is removable, even if the holding member is worn by holding the cylindrical container, only the holding member can be removed from the base cylinder and replaced. Good.

Further, since the base body is supported by the support shaft and the holding member is inserted and fixed to the base body, the thickness of the holding member may be relatively thin, whereby the holding member is composed. The thermal expansion and the like of the holding member made of resin can be made relatively small.

In the method of the present invention, the material of the holding member is made of synthetic resin, so that when the holding member is inserted into and fixed to the base cylinder, the material of the holding member is first obtained. The tubular body is soaked in hot water at a predetermined temperature to process the tubular body into an inner diameter smaller than the outer diameter of the base cylinder, and then the tubular body immersed in hot water at a predetermined temperature is expanded again. Insert and press fit into the base. After that, a contraction force is generated in the cylindrical body by cooling the cylindrical body. As a result, the inner diameter of the tubular body is securely fixed to the base body in an attempt to reduce the inner diameter. Then, the holding member is formed by processing the cylindrical container into an outer diameter into which the cylindrical container can be inserted while the cylindrical body is fixed to the base body. Then, the base body to which the holding member is inserted and fixed is rotatably supported on the support shaft.

[0016]

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a partial central longitudinal sectional view showing the present embodiment.

The apparatus A of the present embodiment, when printing or painting on the outer peripheral surface of a cylindrical container X such as a bottomed can body for a two-piece can,
It is a device for holding the cylindrical container X.

In FIG. 1, reference numeral 1 is a support shaft having a base end portion fixed to a side surface of a spindle conveyor Y and extending horizontally, and 2 is a sleeve rotatably supported by the support shaft 1. ..

Next, each section will be described in detail.

The support shaft 1 has a bracket 3 at its base end.
The bracket 3 is fixed to the side surface of the spindle conveyor Y so as to extend in the horizontal direction. In addition, the support shaft 1 has a suction hole 4 formed therein so as to penetrate in the longitudinal direction. The suction hole 4 is
The support shaft 1 is opened at the front end thereof, and a connection port 5 for connecting an air suction device (not shown) is provided at the rear end of the support shaft 1 so as to communicate with the suction hole 4.

The sleeve 2 comprises a cylindrical base cylinder 6 made of aluminum and a holding member 7 inserted into the base cylinder 6.

The base body 6 is rotatably supported by the support shaft 1 via a pair of bearings 8 and 9 on the inner surface sides of both ends thereof. As the bearings 8 and 9, those having a hermeticity are used. Further, a knurl 6 extending along the longitudinal direction of the base cylinder 6 is provided on a part of the outer peripheral surface of the base cylinder 6 corresponding to a mounting position of a holding member 7 described later.
a is formed.

Further, at the tip of the support shaft 1, a cap 10 for maintaining the state that the base cylinder 6 is supported by the support shaft 1 via the bearings 8 and 9 is provided in the center portion thereof and is hollow. It is screwed onto the support shaft 1 via a male screw 11. The cap 10 is formed with a suction port 13 that opens the opening 12 at the tip of the suction hole 4.

The holding member 7 is formed in a cylindrical shape from nylon, which is a synthetic resin having relatively high wear resistance. The holding member 7 is removably inserted and fixed to the seating position of the cylindrical container X of the base body 6. As a result, the cylindrical container X is inserted into the holding member 7 and held by the sleeve 2.

Then, in this embodiment, the holding member 7 is attached to the base body 6 as follows.

First, about 1 cylinder is used as the material of the holding member 7.
Soak in hot water at 00 ° C for 15 minutes. This causes the nylon cylinder (holding member 7) to expand and swell with water. In the present embodiment, the use of hot water to expand the nylon cylinder (holding member 7) makes it possible to easily maintain a temperature of about 100 ° C. and not raise it to a higher temperature. Therefore, even if water is contained in the nylon cylinder (holding member 7) due to hot water, it is difficult to dehydrate the water once contained. It does not affect

As described above, the inner diameter of the cylindrical body (holding member 7) in a state of being expanded by being immersed in hot water of about 100 ° C. for 15 minutes is
It is processed into a size smaller than the outer diameter of the base body 6. Specifically, when the outer diameter of the base body 6 is 47.2 mm, the inner diameter of the cylindrical body (holding member 7) is processed to 46.5 mm.

Then, the cylindrical body (holding member 7) is again immersed in hot water of about 100 ° C. for 15 minutes. This is to prevent the temperature of the tubular body (holding member 7) from decreasing while the inner diameter of the tubular body (holding member 7) is processed. Then, the base body 6 is press-fitted into the tubular body (holding member 7) while the tubular body (holding member 7) is in an expanded state by soaking in hot water at about 100 ° C. for 15 minutes. At this time, the cylindrical body (holding member 7)
As described above, since it is softened by the hot water of 100 ° C. as described above, the cylindrical body (holding member 7) can be easily attached to the base body 6.

Thereafter, as the temperature of the tubular body (holding member 7) decreases, a contracting force is generated in the tubular body (holding member 7). As a result, the inner diameter of the tubular body (holding member 7) is securely fixed to the outer peripheral surface of the base body 6 in an attempt to reduce the inner diameter. As described above, the tubular body (holding member 7) is expanded and inserted into the base body 6, and is fixed to the base body 6 when cooled, so that the base body 6 does not need a fixing member or the like. It is possible to secure the fixed state to the. Further, the knurling 6a prevents the cylindrical body (holding member 7) inserted into the base body 6 from rotating, and when the cylindrical container X is held, the base body 6 and the tubular body (holding member 7) are separated from each other. It can be surely rotated as one body.

Next, with the tubular body (holding member 7) inserted and fixed to the base body 6, the tubular body (holding member 7) is processed to have an outer diameter that allows the cylindrical container X to be inserted. Then, the holding member 7 which is ground and fixed to the base body 6 is obtained. At this time,
As shown in FIG. 1, the tip of the holding member 7 is formed in a shape corresponding to the inner surface shape of the bottom peripheral edge of the cylindrical container X. Also,
At this time, since the thickness of the holding member 7 is formed to be relatively thin, the expansion and contraction due to the external temperature is relatively small. Therefore, the outer diameter of the cylindrical body (holding member 7) may be processed at room temperature, but for example, the heating temperature of the cylindrical container X when printing or painting the cylindrical container X is performed. When the temperature is about 65 ° C., the temperature at which the outer diameter of the holding member 7 is processed is set to the temperature at which printing or coating on the cylindrical container X is performed, so that printing or coating on the cylindrical container X is performed. Cylindrical container X when performing
It is also possible to make the holding state of the even more precise.

In this way, the sleeve 2 is formed by inserting the holding member 7 made of synthetic resin on the outer peripheral surface of the metal base cylinder 6, so that the conventional sleeve 2 is entirely made of metal. It can be made lighter than the holding member 7
Even if it is made of synthetic resin such as nylon, the thickness thereof may be relatively thin, so that the deformation of the holding member 7 due to heating during printing or painting of the cylindrical container X is small, and Since the seated state of the cylindrical container X when the cylindrical container X is held is good, printing, painting, and the like on the cylindrical container X can be performed with high accuracy.

When the cylindrical container X is held by the sleeve 2, the cylindrical container X is inserted into the holding member 7 by an air suction device (not shown) through the suction hole 4 and the opening 12 at the tip thereof. Suction port 13 of cap 10
Then, the inner surface of the bottom of the cylindrical container X is adsorbed and fixed.

Further, since the holding member 7 is made of a synthetic resin such as nylon, when the holding container 7 holds the cylindrical container X, the inner surface of the cylindrical container X is not scratched, and the cylindrical member X is not damaged. The high quality of the container X can be maintained.

Further, as described above, the cylindrical container X is directly held by the holding member 7. Although the holding member 7 is made of a synthetic resin having high wear resistance such as nylon, the holding member 7 may be worn by holding the cylindrical container X. In that case, it is only necessary to replace the holding member 7 with a new one. That is, the worn holding member 7 is soaked in hot water at 100 ° C. so as to be in a flexible state and removed from the base cylinder 6, and another holding member 7 is attached to the base cylinder 6 in the process described above. As described above, in the present embodiment, it is not necessary to replace the entire sleeve 2 as in the prior art, only the holding member 7 needs to be replaced, and the replacement work is easy, so that the cost is reduced. can do.

[0036]

As is apparent from the above, the apparatus of the present invention is, for example, a cylindrical container on the outer peripheral surface of the holding member, in which the synthetic resin holding member is inserted into the outer peripheral surface of the base cylinder. Since the holding member is held, the weight can be reduced by the amount of the holding member as compared with the conventional case where the entire sleeve is made of metal or ceramic. Further, by holding the cylindrical container on the outer peripheral surface of the holding member made of synthetic resin, it is possible to prevent the inner surface of the cylindrical container from being scratched.

Further, since the holding member inserted and fixed to the base cylinder is removable, even if the holding member is worn by holding the cylindrical container, only the holding member can be removed from the base cylinder and replaced. It is sufficient, and the replacement work can be facilitated and the work efficiency can be improved.

Further, since the base cylinder is supported by the support shaft and the holding member is inserted and fixed to the base cylinder by its self-contraction, the wall thickness of the holding member may be relatively thin. As a result, even if the holding member is made of synthetic resin, the thermal expansion of the holding member is extremely small. Therefore, it is possible to maintain a high holding accuracy of the cylindrical container even if it is heated during printing or painting on the cylindrical container. You can

According to the method of the present invention, the material of the holding member is made of synthetic resin, so that when the holding member is inserted into and fixed to the base cylinder, the tubular body becomes the material of the holding member. Is immersed in hot water of a predetermined temperature for a predetermined time and expanded to process the inner diameter of the tubular body to a smaller diameter than the outer diameter of the base cylinder, and then the tubular body is placed in hot water of a predetermined temperature. After being immersed for a long time and in an expanded state, it is press-fitted and inserted into the base cylinder, and then the inner diameter of the cylinder body is surely fixed to the base cylinder so as to be reduced in diameter as the cylinder body cools. Thus, the holding member can be reliably and easily fixed to the base body without the need for a fixing member. With this, when performing printing or painting of the cylindrical container, the holding member is reliably maintained in the state of being integrally attached to the outer peripheral surface of the base body, so that the printing or painting of the cylindrical container is enhanced. Can be done with precision.

Therefore, according to the present invention, it is possible to prevent the inner surface of the cylindrical container from being scratched, easily replace it when it is worn out, and reduce the cost. Moreover, it is possible to hold the cylindrical container with high accuracy. It is possible to provide a holding device for a cylindrical container and a method for manufacturing the same.

[Brief description of drawings]

FIG. 1 is a partial central longitudinal sectional view showing an embodiment of the present invention holding a cylindrical container.

FIG. 2 is a partial central vertical cross-sectional view showing a conventional cylindrical container holding device.

[Explanation of symbols]

A ... Holding device, X ... Cylindrical container, 1 ... Spindle, 6 ... Base cylinder, 7
... a holding member.

Claims (2)

[Claims] 1. A holding device for rotatably holding the cylindrical container when printing, painting or the like on the outer peripheral surface of the cylindrical container such as a can body, which is rotatably supported by a support shaft, And a cylindrical base body provided so as to be externally insertable, and a synthetic resin tubular shape that is detachably inserted and fixed to the outer peripheral surface of the base cylinder, and the cylindrical container is inserted and held on the outer peripheral surface. The holding device for a cylindrical container, comprising: 2. A method of manufacturing a holding device for rotatably holding the cylindrical container when printing, painting, etc. on the outer peripheral surface of the cylindrical container such as a can body, which is immersed in hot water at a predetermined temperature for a predetermined time. The step of processing the inner diameter of the synthetic resin cylindrical body into a diameter slightly smaller than the outer diameter of the cylindrical base body in which the cylindrical container is externally insertable, and hot water at a predetermined temperature after the step. A step of press-fitting the cylindrical body soaked for a predetermined time into the outer peripheral surface of the base cylinder and inserting the cylindrical body, and then cooling the cylindrical body; After fixing to the outer peripheral surface of the cylindrical container, a step of forming the cylindrical body into a holding member of the cylindrical container by processing the cylindrical body into an outer diameter into which the cylindrical container can be inserted; A method of manufacturing a holding device for a cylindrical container, comprising a step of rotatably supporting a base body on a support shaft.