JP2012136250A - Synthetic resin bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a synthetic resin bottle having a slim neck part which slides on a neck hanging guide to be conveyed, while preventing the guide from being bitten, thereby achieving stable and safe conveyance of the synthetic resin bottle.SOLUTION: The bottle A includes the slim neck part 3 and a body part 5 having a plurality of concave vacuum absorption panels 6. An inclination angle t of a lower end inclination wall 8 which is a lower end step part in circumferential end step parts 7 formed on the circumferential end part of the vacuum absorption panels 6, is set to a small acute angle value with respect to the center axis o of the bottle A. The adjacent bottle A which rides up during the conveyance slides down with its own weight and, as the result, blocking due to the bite to the neck hanging guide of the bottle A is prevented.

Description

  The present invention relates to a synthetic resin bottle that is suspended and held by a neck ring on a neck suspension guide arranged in parallel at regular intervals, and more specifically, a vacuum absorbing panel is formed on the trunk portion. The biaxially stretched blow molded synthetic resin bottle is provided.

  At present, the bottle filling line does not require adjustment of the height of the bottle.Therefore, the neck conveyance that holds the bottle in a suspended state with a neck ring on the neck suspension guide arranged in parallel at regular intervals is the mainstream. It has become.

  Further, as a synthetic resin bottle a, as shown in FIG. 4, a neck ring 2 is provided around the lower end of the outer peripheral surface of the mouth tube portion 1, and an elongated neck portion whose diameter increases from the neck ring 2 toward the shoulder portion 4. 3, and a plurality of (six in the illustrated example) decompression absorption panels 6 are formed in the body portion 5 so as to be depressed in parallel in the circumferential direction. Are known. In FIG. 4, reference numeral 10 denotes a short cylindrical end tube piece that forms the upper and lower ends of the body portion 5, and the end tube piece 10 forms the maximum outer diameter portion of the body portion 5.

  The conventional synthetic resin bottle a shown in FIG. 4 has a stepped shape at the peripheral end of the reduced pressure absorption panel 6 in order to obtain a stable and safe reduced pressure absorption deformation operation of the reduced pressure absorption panel 6. Thus, a peripheral end step portion 7 that exhibits a function of reinforcing ribs is formed. As shown in FIG. 1C of Japanese Patent Application Laid-Open No. 2003-063514 showing the prior art, this peripheral end step portion 7 The lower end step wall 8a (reference numeral 19 in the prior art publication) has a rising inclination angle ta of about 64 ° with respect to the central axis o of the bottle a (especially, see FIG. 5). .

JP 2003-063514 A

  By the way, when the bottle a having the narrow neck 3 described above is neck transported by the neck suspension guide B (in the direction of the arrow in FIG. 6), the bottle a being transported easily swings up and down, and therefore precedes in the middle of transport. The heel portion 13 of the bottom portion 12 of the adjacent bottle a may be in a state of riding on the lower end step portion wall 8a of the subsequent bottle a (see the circled portion in FIG. 6).

  When the heel portion 13 of the preceding bottle a rides on the lower end stepped wall 8a of the succeeding bottle a, the rising inclination angle ta of the lower end stepped wall 8a is steep, so that the lower end stepped wall 8a of the succeeding bottle a The preceding bottle a cannot slide down due to its own weight and is pushed up and pushed up by the subsequent bottle a as it is (see FIG. 7).

  In this way, when the preceding bottle a is pushed up by the succeeding bottle a, the gap s (see FIG. 8A) that existed between the neck suspension guide B and the neck portion 3 before being pushed up disappears. There is a problem that the neck portion 3 fits in between the pair of neck suspension guides B (see FIG. 8B), blocking occurs, and the bottle a cannot be slid and conveyed.

  Therefore, the present invention was devised to solve the problems in the prior art described above, and a synthetic resin bottle having an elongated neck portion that is slid on the neck suspension guide and transported on the neck is galling with respect to the neck suspension guide. The purpose of this is to obtain a stable and safe neck conveyance of synthetic resin bottles.

The main configuration of the present invention for solving the above technical problem is:
It is a synthetic resin bottle provided with an outer collar-like neck ring at the lower end of the outer peripheral surface of the mouth tube part,
Having an elongated neck that expands from the neck ring toward the shoulder,
Forming a plurality of vacuum absorbing panels in the body portion in a circumferentially recessed manner;
Of the peripheral end step portions formed on the peripheral end portion of the reduced pressure absorption panel, the inclination angle of the lower end inclined wall that is the lower end step portion is set to a value that rises with a small acute angle with respect to the central axis of the bottle,
It is in.

  The neck ring of the bottle is a portion that can provide a hanging portion when the bottle is transported in the neck. For example, the neck ring is hooked on a neck suspension guide that is arranged in parallel at regular intervals and is hooked when sliding. As a matter of course, the outer diameter is larger than the distance between the neck suspension guides, and the outer diameter of the neck directly below the neck ring is smaller than the distance between the neck suspension guides. A gap is formed between the neck suspension guide and the neck suspension guide, so that the neck maintains a sliding conveyance operation without being squeezed between the neck suspension guides.

  Even when the bottle sways up and down during the sliding conveyance operation, and the heel portion of the bottom of the preceding bottle is on the lower end inclined wall of the subsequent bottle, the inclination angle of the lower end inclined wall is Since it is set to a value that rises at a small acute angle with respect to the central axis of the bottle, the bottle that has ridden immediately slides down due to its own weight, so that the preceding bottle is not pushed up by the succeeding bottle, and the bottle being transported The neck of the camera does not dig into the neck suspension guide.

  In other words, in order for the heel portion at the bottom of the preceding bottle to ride on the lower inclined wall of the succeeding bottle, the bottle needs to be inclined in the transport direction. When the section rides on the lower inclined wall of the succeeding bottle, the inclined angle of the lower inclined wall of the succeeding bottle becomes closer to the vertical, which is smaller than the set small acute angle, and the influence of vibration associated with the transport operation Thus, the preceding bottle slides down from the lower inclined wall of the succeeding bottle.

  Another configuration of the present invention is such that, in the main configuration described above, the inclination angle of the lower end inclined wall is set to a value of 40 ° or less.

  When the inclination angle of the lower end inclined wall is set to a value of 40 ° or less, the lower end inclined wall of the succeeding bottle is almost vertical when the heel portion of the preceding bottle rides on the lower end inclined wall of the succeeding bottle. Since it becomes a posture, the preceding bottle slides down reliably and promptly from the lower end inclined wall of the succeeding bottle.

  In addition, another configuration of the present invention is provided in the main configuration described above with a lower end cylinder piece in the form of a short cylinder piece that forms a lower end portion and a maximum outer diameter portion of the trunk portion immediately below the vacuum absorption panel, A circumferential groove-like reinforcing groove is provided between the lower end cylinder piece and the bottom.

  In the case where the lower end cylinder piece in the shape of a short cylinder piece is provided directly under the vacuum absorbing panel, and the peripheral groove-like reinforcing groove is provided between the lower end cylinder piece and the bottom part, the lower side The combination of the end tube piece and the reinforcing groove functions as a reinforcing rib, and the lower end portion of the body portion is effectively reinforced from a lateral load.

Since the present invention has the above-described configuration, the following effects can be obtained.
In the main configuration of the present invention, the preceding bottle is not pushed up by the succeeding bottle, so that the neck of the bottle being transported does not dig into the neck hanging guide. In the conveyance, the occurrence of blocking can be surely prevented, and thereby a stable and safe neck conveyance can be obtained by the neck hanging guide of the bottle having a narrow neck portion.

  In the case where the inclination angle of the lower end inclined wall is set to a value of 40 ° or less with respect to the central axis of the bottle, the preceding bottle slides reliably and quickly from the lower end inclined wall of the subsequent bottle. Stable and safe neck conveyance can be obtained reliably.

  If the lower end cylinder piece in the form of a short cylinder piece is provided directly under the reduced pressure absorption panel, and the peripheral groove-like reinforcing groove is provided between the lower end cylinder piece and the bottom part, the trunk part Therefore, the lower end portion of the body portion in which the lower end inclined wall is formed is mechanically stabilized.

It is a whole front view which shows one example of embodiment of the bottle of this invention. It is a principal part longitudinal cross-sectional view of the embodiment shown in FIG. It is explanatory drawing which shows the neck conveyance operation state of the example of embodiment of FIG. It is a whole front view which shows a prior art example. It is a principal part longitudinal cross-sectional view of the prior art example shown in FIG. It is explanatory drawing which shows the neck conveyance operation state of the prior art example shown in FIG. It is explanatory drawing of blocking generation | occurrence | production from the state of FIG. It is explanatory drawing which shows the relationship between a bottle neck part and a neck hanging guide.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
A bottle A according to the present invention includes a mouth tube portion 1, a slender neck portion 3 connected to the bottom of the mouth tube portion 1, a body portion 5 connected to the neck portion 3 via a shoulder portion 4, and the body portion. The bottom part 12 which closes the lower end of 5 is comprised, and biaxial stretch blow molding is carried out with synthetic resin materials, such as PET.

  The mouth tube portion 1 has a cylindrical shape in which a thread is engraved on the outer peripheral surface and an outer collar-like neck ring 2 is provided around the lower end of the outer peripheral surface.

  The neck portion 3 is formed in an elongated cylindrical shape whose diameter increases from the lower end of the mouth tube portion 1 provided with the neck ring 2 toward the shoulder portion 4, and the appearance of the bottle A as a whole is champagne due to the shape of the neck portion 3. It has a bottle shape.

  The trunk portion 5 connected to the lower end of the neck portion 3 through the gentle shoulder portion 4 is basically cylindrical, and a plurality of (in the case of the illustrated embodiment, 6 in the illustrated embodiment, the column portion 9 is positioned therebetween). Are formed in parallel with each other in the circumferential direction, and short cylindrical end tube pieces 10 are provided above and below the portion where the reduced pressure absorption panel 6 is provided. A circumferential groove-like reinforcing groove 11 is provided between the bottom end portion 12 and the bottom portion 12, and a circumferential groove 14 is provided between the upper end tubular piece 10 and the shoulder portion 4.

  The reduced pressure absorption panel 6 formed on the body portion 5 includes a vertically long main body portion having a cylindrical wall shape and a peripheral end step portion 7 formed at the peripheral end of the main portion. Stands up at a relatively large angle with respect to the central axis o of the bottle A so as to function as a reinforcing rib. The lower end inclined wall 8, which is a portion located at the lower end of the peripheral end step portion 7, has a sufficient inclination angle t (see FIG. 2) with respect to the central axis o as compared to other peripheral end step portions 7. A small acute angle is set, and the value thereof is such that the adjacent bottle A riding on the heel portion 13 of the bottom portion 12 slides down due to its own weight.

  Specifically, the inclination angle t of the lower end inclined wall 8 is preferably 45 ° or less, but is particularly preferably set to 40 ° or less. For example, when the inclination angle t of the lower end inclined wall 8 is set to 40 °, the heel portion 13 of the preceding bottle A rides on the lower end inclined wall 8 of the subsequent bottle A during the sliding neck conveyance (see FIG. 3). Then, as a matter of course, the succeeding bottle A is inclined in the transport direction (the arrow direction in FIG. 3), so that the substantial inclination of the lower end inclined wall 8 of the succeeding bottle A with respect to the vertical direction. The angle is 15 ° or less in terms of data. For this reason, it is impossible to maintain the state in which the heel portion 13 of the preceding bottle A rides on the lower end inclined wall 8 of the succeeding bottle A, and the preceding bottle A slides down from the succeeding bottle A.

  Furthermore, since this state occurs during the sliding neck transport operation, each bottle A is constantly vibrated with the sliding transport, so that the preceding bottle A slips from the subsequent bottle A. The fall is encouraged by vibrations and surely slides down.

  The end cylinder pieces 10 formed above and below the main portion of the body portion 5 forming the reduced pressure absorption panel 6 form the maximum outer diameter portion of the bottle A, and during the sliding neck conveying operation, the adjacent bottle A By performing most of the abutment with the end tube piece 10, the posture of the bottle A being conveyed is stabilized as much as possible, and the damage due to the abutment is limited to the end tube piece 10 as much as possible. Further, the end cylinder piece 10 is also a portion that reinforces the mechanical strength of the main portion of the body portion 5 on which the reduced pressure absorption panel 6 is formed, so that the reduced pressure absorption deformation of each reduced pressure absorption panel 6 is performed well. ing.

  The reinforcing groove 11 provided between the lower end tube piece 10 and the bottom portion 12 and the circumferential groove 14 provided between the upper end tube piece 10 and the shoulder portion 4 mainly cross the trunk portion 5. Although the reinforcement groove 11 reinforces the load, the reinforcing groove 11 exerts a strong reinforcing effect on the lower end tubular piece 10, and even if the rising angle of the inclination angle t of the lower end inclined wall 8 is small, It is designed to exert a sufficient resistance against the load.

  The bottom portion 12 has a central portion of the frustum tube wall structure depressed inside the bottle A via a heel portion 13 at a lower end of a cylindrical bottom tube portion continuously provided to the body portion 5 via the reinforcing groove 11. The heel part 13 is located in the peripheral edge part, and forms the grounding part.

  In the present invention, as shown in FIG. 3, even if the heel portion 13 of the preceding bottle A rides on the lower inclined wall 8 of the succeeding bottle A, the preceding bottle A is quickly brought into the succeeding bottle by its own weight. As described above, the preceding bottle A is not pushed up by the succeeding bottle A. Therefore, the assembled relationship of the neck 3 with the neck suspension guide B is as shown in FIG. A state in which a gap s is always formed between the neck suspension guide B and the neck portion 3 is maintained, and thus no blocking occurs.

  The structure of the main part of the vacuum absorbing panel 6 formed in the body part 5 is not specified in the illustrated embodiment, and various structures such as a slanted one, a thin part provided with a thin groove in the main part, etc. It is possible to have a structure of Moreover, although PET was mentioned as the molding resin material of the bottle A, other synthetic resin materials can be used as long as the required smoothness of the surface of the bottle A can be obtained.

  As described above, the bottle of the present invention can surely prevent the occurrence of blocking of the synthetic resin bottle transported by the sliding neck, and is wider than the synthetic resin bottle handled by the sliding neck transport. Use expansion is expected.

A, a; Bottle 1; Mouth tube part 2; Neck ring 3; Neck part 4; Shoulder part 5; Body part 6; Depressurized absorption panel 7; Peripheral end step part 8; Part 10; end cylinder piece 11; reinforcing groove 12; bottom part 13; heel part 14; circumferential groove o; central axis t, ta; inclination angle B; neck suspension guide k;

Claims (3)

A synthetic resin bottle (A) provided with an outer collar-like neck ring (2) at the lower end of the outer peripheral surface of the mouth tube portion (1), which expands from the neck ring (2) toward the shoulder (4). A narrow neck portion (3) having a diameter is formed, and a plurality of reduced pressure absorption panels (6) are formed in the trunk portion (5) so as to be recessed in parallel in the circumferential direction, and formed at the peripheral end portion of the reduced pressure absorption panel (6). A value that rises at a small acute angle with respect to the central axis (o) of the bottle (A) with respect to the central axis (o) of the bottle (A), of the peripheral end step portion (7). A synthetic resin bottle characterized by being set to The synthetic resin bottle according to claim 1, wherein the inclination angle (t) of the lower end inclined wall (8) is set to a value of 40 ° or less. A lower end tubular piece (10) in the form of a short tubular piece that forms the lower end portion and the maximum outer diameter portion of the body portion (5) is provided immediately below the vacuum absorbing panel (6), and the lower end tubular piece is provided. The synthetic resin bottle according to claim 1 or 2, wherein a circumferential groove-shaped reinforcing groove (11) is provided between (10) and the bottom (12).

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