JP4609926B2 - Sealing material applicator - Google Patents

Description

  The present invention relates to a sealing material coating apparatus.

  As shown in FIG. 3 of the accompanying drawings, the tube 50 is formed by raising a flange portion 52 around the bottom plate 51 and the top plate, and winding the end portion of the trunk tube around the flange portion. It is often done. In that case, since the adhesive is applied to the winding surface, the seal is secured. However, since the end surface 54 of the barrel tube is exposed, particularly when the material is paper, the end surface absorbs moisture or the like and becomes weak, so that the sealing strength may be lowered.

Therefore, in the case of a cylindrical body for a product used in a place with moisture or a place with high humidity, a sealing material 55 is applied to an annular corner portion that is a boundary between the wound portion and the bottom plate or the top plate. The end face is covered and protected.
Not found

  However, the above known sealing material application has been required to be improved in the following points.

  (1) Since the winding end surface 54 forms a narrow groove with the bottom plate 51, the sealing material is reliably applied so as to reach the end surface 54. As a result, the coating amount becomes larger than necessary, and the sealing material is wasted.

  (2) Since a large amount of sealing material is applied, drying of the sealing material is slow.

  (3) When there are many sealing materials, it will become one lump, and when it receives an impact after drying, it may be partially cut off and fall off.

  (4) Air may be present inside the material of the cylindrical body, and it is heated and expanded by the heat of the applied sealing material itself, creating a pinhole in the applied sealing material, and moisture enters from here. Sometimes.

  (5) After applying the sealant and before drying, the excess sealant will sag and impair the aesthetics. In particular, since the cylindrical body is moved or its posture can be changed before drying, the tendency is great.

  An object of the present invention is to provide a sealing material coating apparatus that can improve such a point and can efficiently and reliably apply a minimum amount of the sealing material.

The sealing material application apparatus according to the present invention applies the sealing material to the annular corner portion or the annular groove portion formed in the cylindrical body inward in the radial direction around the axis of the paper cylindrical body. It has become.

In such a sealing material coating apparatus, the present invention includes a rotatable tubular holding body have a radially inner surface of the size and holding the press-fitting the cylindrical body in the axial direction is fitted holding the tubular body and driving means for rotating said cylindrical holder at a predetermined rotational speed, sealant relevant section faces the at least one portion of the upper annular corner or cyclic groove held by the cylindrical holder cylindrical body And a sealing material replenishing means for replenishing the nozzle with a sealing material.

In the device of the present invention having such a configuration, the sealing material is injected from the nozzle onto the rotating paper tubular body. Therefore, since the sealing material also enters the narrow portion by centrifugal force, the cylindrical body is securely sealed and only a minimum amount of sealing material is required. Moreover, the sealing material becomes uniform in the circumferential direction by the centrifugal force. The sealing material enters not only the winding end surface of the paper tube, but also when there is a gap in the winding surface, thereby improving the sealing performance.

  In the present invention, it is preferable that the nozzle is supported by the support so that the position and direction of the ejection port can be varied. By doing so, even if a cylindrical body having a different shape and size is set, the position and direction of the nozzle can be immediately set correspondingly.

  In the present invention, if the nozzle is provided on one side or both sides in the axial direction relative to the cylindrical body, one or both of the top plate and the bottom plate of the cylindrical body are required. Can be sealed accordingly.

  Furthermore, in the present invention, if it has preheating means for blowing high-temperature air for heating the annular corner portion or the annular groove portion or its periphery before applying the sealing material, the cylinder before applying the sealing material The air present in the material of the rod-like material is ejected by heating to prevent pinholes in the applied sealing material. In that case, it is preferable that the preheating means is supported by the support together with the nozzle. By doing so, the structure of the apparatus is simplified, and the nozzle and the drying means can be changed and set at a time when changing to a different cylindrical body.

In the present invention, as described above, the sealing material is sprayed from the nozzle onto the annular corner portion or annular groove portion of the paper tubular body while rotating the tubular body. In addition to being uniformly applied in the circumferential direction without accompanying, it is surely entered into a narrow part by centrifugal force, so that even a minimum amount can be surely sealed and no pinhole is generated. As a result, the seal is formed as a relatively thin layer and is flexible so that it will not be lost by impact even after drying. Furthermore, since the application amount is small, not only the consumption of the sealing material can be reduced, but also the time for application and drying is shortened and the productivity is increased.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 and 2 of the accompanying drawings.

  In FIG. 1, reference numeral 1 denotes a base of the sealing material application apparatus of the present embodiment, and a bar-like support member 2 is fixed to the base 1 by a flange 3 and a bolt 4.

A cylindrical housing 6 is vertically fixed to the upper surface of the base 1 by bolts 5. A cylindrical holder 11 is rotatably supported in the cylindrical housing 6 via two bearings 9 and 10 positioned by snap rings 7 and 8. The inner diameter surface 11A of the cylindrical retaining body 11, the sealing member is dimensioned enough to hold press-fitted lightly tubular body to be coated. Axial position is defined by the cylindrical retaining member 11 is a bearing 9, 10 and snap ring 12. The cylindrical holder 11 protrudes vertically from the cylindrical housing 6, an introduction taper portion 11 </ b> B is formed on the inner surface of the upper end, a support step portion 11 </ b> C protruding radially inward on the inner surface of the lower end, and the outer surface of the lower end An attachment step 11D is formed on the. A driving pulley 13 is attached to the attachment step portion 11D with a bolt 14. A belt 15 that receives a driving force from a pulley of a speed reducer connected to a motor (not shown) is stretched on the pulley 13.

  A support 16 for supporting a nozzle is attached to the upper and lower portions of the support member 2. The support body 16 is provided with a lateral member 17 whose vertical position is variably attached to the support member 2, and a lateral position (lateral direction in the drawing) with respect to the lateral member 17. A shaft body 18 that is perpendicular to the paper surface and an arm member 19 that can be attached to the shaft body 18 with a variable angular position around the shaft body 18. A seal material supply body 20 is fixedly attached to the arm member 19, and a nozzle 21 for receiving a liquid seal material from the seal material supply body 20 and ejecting the seal material is connected to the seal material supply body 20. . The seal material supply body 20 is supplied with a seal material from a seal material supply source (not shown) via a flexible tube 22 connected to the supply hole 20A. Sometimes controlled to eject sealant.

  In such an apparatus according to the present embodiment, a cylindrical body such as a paper tube is sealed in the following manner.

(1) After the cylindrical body P to be sealed is determined, after the cylindrical holding body 11 having an inner diameter suitable for fitting and holding the cylindrical body P is selected and inserted into the corresponding housing 6 , attached to pulley 13 to the tubular holding body 11, to which is stretched the belt 15.

(2) Next, the cylindrical body P is inserted into the cylindrical holder 11 from above and is held. The bottom surface of the cylindrical body P comes into contact with the support step portion 11C, and the height direction position is determined. Since the cylindrical body P state which is lightly press fitted into the cylindrical holding member 11, it is both rotatable held by the tubular retainer 11.

  (3) After that, the position and posture of the nozzle 21 are determined. The position of the nozzle 21 in the height direction moves the horizontal member 17 up and down by loosening the bolt 23, and loosens the bolt (not shown) in the left and right position to move the shaft 18 left and right, and the angular position is the bolt 24 and screw. 25 is loosened and rotated around the shaft 18 to determine. Thus, the upper and lower nozzles 21 bring their jets 21A closer to the sealed portion of the cylindrical body P, for example, an annular corner, and fix the position and direction of the jets 21A. At that time, when the cylindrical body P is sealed only to the bottom plate, for example, the upper nozzle 21 may be removed or may be shifted to the standby position.

(4) Next, when the belt 15 is driven to rotate the cylindrical holder 11, the cylindrical body P rotates together with the cylindrical holder 11. An appropriate amount of sealing material is ejected from the nozzle 21 toward the annular corner of the rotating cylindrical body P, that is, toward the corner formed by the bottom plate P1 and the tightening portion P2 as shown in FIG. Even a small amount of the sealing material is reliably brought to the end face of the tightening portion P2 by its centrifugal force and uniformly applied in the circumferential direction under pressure to form the sealing portion S. When sealing the top plate P3, the sealing material is similarly applied by the upper nozzle 21. At that time, if there is any gap on the winding surface, the sealing material also enters this gap under centrifugal force to reinforce the sealing surface.

(5) Thus, the sealed cylindrical body P is taken out from the cylindrical holding body 11, and the next cylindrical body is set and sealed one after another.

The present invention is not limited to the illustrated form, and various modifications are possible. For example, when the cylindrical body is inserted into the cylindrical holding body one after another, the upper nozzle body may become an obstacle to the insertion of the cylindrical body. In that case, any member of the support 16 can be reciprocated between the set position of the nozzle and the standby position so that the nozzle can automatically return to the set position after the cylindrical body is inserted. It is preferable to keep it. Furthermore, if the cylindrical body can be automatically inserted in conjunction with the standby movement of the nozzle, a large number of cylindrical bodies can be efficiently sealed.

  Furthermore, if it is provided with a preheating means for heating the bottom plate and the top plate of the cylindrical body prior to sealing, the air contained in the material of the bottom plate and the top plate is heated and expanded to be tightened. It can be ejected from the end face, and the generation of pin holes after sealing can be prevented. As the preheating means, high temperature air may be blown to the bottom plate and the top plate. If the preheating means is supported by the support together with the nozzle, the setting for changing the position to a different kind of cylindrical body becomes easy.

It is a longitudinal cross-sectional view of one Embodiment apparatus of this invention. It is a figure which shows the to-be-sealed part of the cylindrical body in FIG. It is a longitudinal cross-sectional view which shows the seal part of the conventional cylindrical body.

Explanation of symbols

11 cylindrical holder 13 drive means (pulley)
15 Drive means (belt)
16 Support body 20 Sealing material supply means (sealing material supply body)
21 nozzles

Claims (5)

In an apparatus for applying a sealing material to an annular corner portion or an annular groove portion formed in the cylindrical body inward in the radial direction around the axis of the paper cylindrical body,
A rotatable cylindrical holder for fitting holding the tubular body have a radially inner surface of the size and holding the press-fitting the cylindrical body in the axial direction, the cylindrical holder at a predetermined rotational speed driving means for driving the rotation, a nozzle for ejecting the sealant relevant section faces the at least one portion of the upper annular corner or cyclic groove held by the cylindrical holder cylindrical body, the sealing material to the nozzle And a sealing material replenishing means for replenishing the sealing material.   2. The sealing material applying apparatus according to claim 1, wherein the nozzle is supported by a support so that a position and a direction of a jet port are variably provided.   The sealing material coating apparatus according to claim 1 or 2, wherein the nozzle is provided on one side or both sides in the axial direction with respect to the cylindrical body.   In addition to the sealing material application apparatus according to claim 1, it further comprises a preheating means for blowing high-temperature air for heating the annular corner portion or the annular groove portion or its periphery before applying the sealing material. apparatus.   The sealing material coating apparatus according to claim 4, wherein the preheating means is supported together with the nozzle by a support.

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