JP2006047058A - Thread depth measuring device and thread depth measuring method for new bottle can - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thread depth measuring device and a thread depth measuring method, capable of easily and in a short time measuring the shape of a threaded part formed on a new bottle can and the threaded part of a cap to be fitted, to ensure reliable sealing of the bottle type can and a proper cap opening and closing torque. <P>SOLUTION: This thread depth measuring device 1, for measuring the thread depth of the threaded part of the bottle type can 30 or the cap threaded part 39 formed in the peripheral part of the cap 38 to be fitted, is provided with a device body 2 for supporting the can 30 rotatably, a moving member 10 attached so as to be freely movable forward and backward in the direction of the threaded part 39 of the cap, a reference contact shoe 17 that is brought into contact with a thread ridge portion of the threaded part 39 of the cap, and a measuring contact shoe 24 that is brought into contact with a thread bottom portion. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a screw depth measuring device and a screw depth measuring method for measuring a screw depth of a bottle can screw portion formed on a cap portion of a bottle can or a screw portion formed on an outer periphery of a cap.

As is well known, the contents can be stored hygienically by sealing the opening with a cap even after opening, in one of the containers for filling and selling contents such as drinking water. Depending on the situation, metal bottle cans are widely used as drinks that can be divided into several times.
Since bottle caps are generally opened and closed several times as described above, it is desirable that the cap opening torque and the reseal torque at the time of closing be small, especially for women and children. For consumers with low grip strength, it is desirable that the torque during opening and closing be small.

On the other hand, the metal material constituting the bottle can has a higher frictional resistance than a PET (polyethylene terephthalate) bottle or the like, and requires a large torque when opening and closing the cap.
Therefore, various proposals have been made such as adding a wax component such as polyethylene to the coating film of the inner surface paint of the cap to improve the slidability for the purpose of making the torque when opening and closing the cap as small and uniform as possible. It has also been proposed to measure the main dimensions of a cap by optical means for a PP cap (see, for example, Patent Document 1).
Japanese Patent No. 3456684

  However, when it is subjected to severe manufacturing processes such as heating the bottle can at about 100 ° C. or more for application to a retort beverage, the inner surface paint is used to achieve both sealing performance during heating and comfortable opening torque. It is not enough to improve the coating film of the bottle can screw part of the bottle can or the screw part of the cap formed on the bottle can (the cap refers to the screw shape formed on the outer periphery of the cap, hereinafter referred to as the cap screw part) ) Is appropriately managed appropriately.

  The present invention has been made in consideration of such circumstances, and the dimensions of the shape of the bottle screw portion formed on the bottle can and the cap screw portion attached to the screw portion are used as the sampling rule of the manufacturing process. An object of the present invention is to provide a screw depth measuring instrument and a screw depth measuring method capable of easily and quickly measuring a screw shape of a cap part such as a bottle can that needs to be measured without being restricted.

In order to solve the above problems, the present invention proposes the following means.
The invention according to claim 1 is a screw for measuring a screw depth of a bottle screw part formed on a cap part of a bottle can or a cap screw part formed on an outer peripheral part of a cap attached to the bottle can screw part. A depth measuring device that supports the bottle can so as to be rotatable about the axis of the base, and is capable of moving forward and backward in the direction of the bottle can screw portion or the cap screw portion on the device main body. A mounted moving member; a reference contact provided on the moving member and abutting against one of a crest portion and a trough portion of the bottle can screw portion or the cap screw portion; and the bottle can on the moving member It is provided so as to be able to advance and retreat in the direction of the threaded portion or the cap threaded portion, and includes a measuring contact that is brought into contact with the other of the peak portion and the valley portion.

According to the screw depth measuring instrument according to claim 1, since the bottle can is supported by the apparatus main body so as to be rotatable around the axis of the base portion of the bottle can, the bottle can is rotated in the circumferential direction. A bottle can screw part or a cap screw part (refers to a screw-like shape formed on the outer periphery of the cap; hereinafter the same) circulates around the axis of the base part.
In this state, when the reference contact provided on the moving member is brought into contact with either the crest portion or the trough portion of the bottle can screw portion or the cap screw portion, the measuring contact provided on the moving member becomes the bottle. Advances and retracts in the direction of the can screw part or cap screw part, contacts the other of the crest or valley part of the bottle can screw part or cap screw part, measures the relative position in the radial direction of the screw part as a dimension, and The depth of can be measured. In this case, since the reference contact and the measurement contact are disposed on the same moving member, the reference contact and the measurement contact make the relative portions of the crest portion and the trough portion of the bottle can screw portion or the cap screw portion. The positional relationship can be measured.

  Invention of Claim 2 is the screw depth measuring device of Claim 1, Comprising: The said apparatus main body is provided with the V-groove which supports the trunk | drum of the said bottle can rotatably. And

  According to the screw depth measuring instrument according to claim 2, the bottle can screw part or the cap screw part is centered on the axis of the base part by the body part of the bottle can being supported by the V groove of the apparatus body and being rotated. Therefore, the reference contact and the measurement contact are accurately brought into contact with the screw surface as the measurement site, and as a result, the screw depth can be measured easily and accurately.

  Invention of Claim 3 is the screw depth measuring device of Claim 1 or Claim 2, Comprising: The said moving member is urged | biased in the said bottle can screw part or the said cap screw part direction. Features.

According to the screw depth measuring instrument according to claim 3, since the moving member is urged toward the bottle can screw part or the cap screw part by the urging means, the reference contact and the measurement contact are the bottle can screw. Therefore, the screw depth can be easily measured by rotating the bottle can around the axis of the cap part.
In addition, since the reference contact and the measurement contact are brought into contact with the screw portion at a substantially constant pressure by urging the moving member by, for example, a spring or the like, there is no deformation of the screw shape due to variation in the measurement pressure, Generation of measurement errors can be suppressed.

  Invention of Claim 4 is the screw depth measuring device of Claim 2 or Claim 3, Comprising: It arrange | positions in contact with the inclined surface of the at least one side of the said V groove, The said bottle can screw part or An adjustment plate is provided for adjusting the center axis of the cap screw part so as to be held on the axis of the measurement contact.

  According to the screw depth measuring instrument of the fourth aspect, the bottle can screw portion or the cap can be used even when measuring bottle cans having different outer diameters by arranging the adjustment plate in contact with the one inclined surface of the V groove. Since the central axis of the screw part is held on the axis of the measurement contact, the measurement contact is perpendicular to the central axis of the bottle can screw part or the cap screw part, and the thread part is measured at the crest or trough part. On the other hand, since the reference portion and the measuring element abut at a right angle, the screw depth can be measured easily and accurately.

  A fifth aspect of the present invention is the screw depth measuring instrument according to any one of the second to fourth aspects, wherein the moving member is detachably attached to the apparatus main body. To do.

According to the screw depth measuring instrument of the fifth aspect, since the moving member is detachable from the apparatus main body, the apparatus main body and the moving member can be easily divided and downsized.
As a result, it can be easily transported and handled.

  The invention according to claim 6 measures the screw depth of the bottle screw portion formed on the cap portion of the bottle can or the cap screw portion formed on the outer peripheral side of the cap attached to the bottle can screw portion. A screw depth measuring method, wherein the bottle can is held around an axis of the base part and the bottle can is rotated around an axis of the base part, and the bottle can screw part or the cap screw part Measuring the screw depth of the screw portion by bringing a reference contact into contact with either the peak portion or the valley portion and bringing a measurement contact into contact with the other of the peak portion or the valley portion. Features.

  According to the screw depth measuring method according to claim 6, the bottle can is rotated around the axis of the cap portion while the center axis of the bottle can screw portion or the cap screw portion is held at a predetermined position, and the bottle can screw Since the other position is measured with reference to either the peak portion or the valley portion of the cap portion or the cap screw portion, the screw depth can be easily and accurately measured.

  According to the screw depth measuring instrument or the screw depth measuring method according to the present invention, the screw depth of the bottle can screw part or the cap screw part can be easily and accurately measured. Moreover, the changeover to the bottle cans having different outer diameters can be easily performed in a short time.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a view showing a screw depth measuring instrument according to the first embodiment, wherein reference numeral 1 denotes a screw depth measuring instrument, and reference numeral 30 denotes a bottle can with a cap. Moreover, FIG. 2 is a figure which shows the bottle can 30 with a cap.
As shown in FIG. 2, the bottle can 30 with a cap includes a bottle can 31 and a cap 38, and the bottle can 31 is formed of a thin plate of aluminum or an aluminum alloy, and includes a body portion 32 and an upper end of the body portion 32. A shoulder portion 34 that gradually decreases in diameter as it goes upward, and a base portion 35 that is provided at the upper end of the shoulder portion 34 and has a diameter smaller than that of the body portion 32 are provided. The cap portion 35 is formed with a bottle can screw portion 37 and is hermetically sealed by being attached with a cap 38.

The cap 38 has a threaded portion formed on the inner side of the peripheral wall, and can be screwed to the bottle can screwed portion 37 formed on the cap portion 35 of the bottle can 31. The cap screwed portion 39 is formed on the outer periphery of the peripheral wall. (The cap screw portion refers to a screw shape formed on the outer periphery of the cap).
In this embodiment, the bottle can 30 is capped, the axis of the bottle can 31 and the base portion 35 coincides with reference numeral O _1.

Next, based on FIG. 1, FIG. 2, the structure of the screw depth measuring device which concerns on 1st Embodiment is demonstrated.
The screw depth measuring device 1 supports the can body portion 32 of the bottle can 30 with cap, and the apparatus main body 2 that can rotate around the axis O ₁ of the cap portion 35 of the cap 30 with cap, and the moving member 10. And a dial gauge 20 provided on the moving member 10.
The apparatus main body 2 is a metal block, and the moving member 10 is disposed in the vicinity of the V groove 3 that supports the bottle can 30 with the cap and the cap screw portion 39 when the bottle can 30 with the cap is disposed in the V groove 3. A recessed portion 7 is formed.
The V-groove 3 is composed of inclined surfaces 4 a and 4 b that are inclined at 45 ° with respect to the bottom surface of the apparatus main body 2 in the cross section in the direction of the axis O ₁ and intersect with each other at 90 °. In this case, the normal line of the can body part 32 at the contact point between the can body part 32 and the V groove 3 intersects the axis O ₁ of the base part 35.

Further, the guide rail 8 for freely advance and retreat in the arrow G1, G2 direction intersecting perpendicularly the moving member 10 relative to the axis O ₁ of the base portion 35 is provided on the upper surface of the recess 7.
The moving member 10 includes a moving member main body 12, a tension spring 16 for urging the moving member main body 12 in the cap screw portion direction, a screw 14 for connecting the tension spring 16 and the moving member 10, and a dial gauge. 20.

The moving member body 12 is formed with a reference contact 17, a fixing hole (not shown) for placing and fixing the dial gauge 20, and a guide groove 18 for fixing the guide rail 8 on the side surface and the upper and lower surfaces. A guide rail 8 is inserted into the groove 18.
As shown in FIG. 3, the reference contact 17 protrudes to the side where the base part 35 of the moving member main body 12 is arranged, and its tip part is arranged at a position where the axis is orthogonal to the axis of the base 35, and the cap screw The small flat part which contact | abuts perpendicularly | vertically on the top part of one peak part M of the part 39 is provided.

The dial gauge 20 includes a display unit 22 on which measured numerical values are displayed and a measurement contact 24. The dial gauge 20 is disposed in a fixed hole (not shown) of the movable member main body 12, and the axis of the measurement contact 24 has a base 35. Is arranged so as to be orthogonal to the axis O ₁ and parallel to the advancing / retreating direction (arrow F 1, F 2 direction) of the moving member 10, and the tip of the measurement contact 24 is located at the bottom of the valley portion R of the cap screw portion 39 It comes to contact.

Further, the measurement contact 24 of the dial gauge 20 can be advanced and retracted in the directions of arrows G1 and G2 shown in FIG. 3 in a state where the reference contact 17 is in contact with the crest portion M of the cap screw portion 39, and sufficient measurement is possible. The margin is secured, and the pointer of the display unit 22 is adjusted to zero at the reference dimension of the screw depth, for example, with a gauge or the like.
Further, the tension spring 16 connects the moving member main body 12 and the apparatus main body 2 via the screw 14 and the screw 19 provided in the apparatus main body 2, and the moving member main body 12 is in the direction of the cap screw portion 39 (the direction of the arrow F1). It is supposed to be energized.

Next, a method of using the screw depth measuring device 1 will be described.
First, prior to disposing the bottled can 30 with the cap on the screw depth measuring instrument 1, the moving member 10 is moved in the direction of the arrow F2 opposite to the urging direction of the tension spring 16 (the direction of the arrow F1). A clearance is secured so that the tip of the contact 17 and the measurement contact 24 do not contact the cap screw portion 39 of the cap 38.

Next, the bottle can 30 with a cap is placed on the screw depth measuring instrument 1 so that the axis thereof is along the longitudinal direction of the V groove 3.
In this case, since the axis O _{1 of the} bottled cap 30 with the cap 35 coincides with the axis O ₁ , the bottled can 30 with the cap is held rotatably around the axis O ₁ of the cap 35, When the bottle can 30 is rotated while being brought into contact with the inclined surface of the V groove 3, the bottle can 30 is rotated about the axis O ₁ of the base part 35.

Next, the moving member 10 is brought closer to the cap portion 35 side of the bottle can 30 with cap by the urging force of the tension spring 16, the reference contact 17 is brought into contact with the crest portion of the cap screw portion 39, and the cap screw portion 39. The measurement contact 24 is brought into contact with the trough portion.
By rotating the cap with the bottle can 30 around the axis O _1, the cap thread portion 39 of the cap 38 which is applied to the base portion 35 is rotated about the axis O ₁ of the base part 35, the dial gauge 20 The measurement contact 24 measures the displacement of the depth of the valley portion R with reference to the peak portion M of the cap screw portion 39.
The displacement of the valley portion R is known from the peak portion M, and the screw depth of the cap screw portion 39 can be known by adding to the reference dimension when the measuring contact 24 becomes zero.

According to thread depth measuring device 1 of the first embodiment, the can body 32 of the capped bottle can 30 is supported on the V grooves 3 of the apparatus body 2, the base part 35 about its axis O ₁ Since the bottle can with cap 30 is rotated in the circumferential direction, the cap screw portion 39 can be rotated around the axis O ₁ of the base portion 35.
When the reference contact 17 provided on the moving member 10 is brought into contact with the crest portion M of the cap screw portion 39, the measurement contact 24 moves in the direction of the cap screw portion 39 and at the valley portion R of the cap screw portion 39. Abutting and measuring the relative dimension of the cap screw portion 39 in the radial direction, that is, the displacement of the screw depth, and determining the screw depth from the relative positional relationship (reference dimension) between the reference contact 17 and the measurement contact 24. Can be measured.

Further, since the moving member 10 is biased by the tension spring 16 in the direction of the cap screw portion 39 (the direction of the arrow F1), the reference contact 17 and the measurement contact 24 are automatically brought into contact with the cap screw portion 39. Therefore, the screw depth can be easily measured by rotating around the axis O ₁ of the cap part 35 of the bottle can 30 with cap.
Further, by rotating the bottle can 30 with the cap, the cap screw portion 39 circulates around the axis O ₁ of the base portion 35, and the reference contact 17 biased in the direction of the cap screw portion 39 by the tension spring 16. Since the measurement contact 24 abuts accurately on the cap screw portion 39 that is a measurement site, the screw depth can be measured easily and accurately.

Further, the moving member 10 is urged in the direction of the arrow F1 by the tension spring 16, and the reference contact 17 and the measurement contact 24 abut against the cap screw portion 39 with a substantially constant force. There is no possibility of deformation, and generation of measurement errors due to measurement pressure can be suppressed.
In addition, since it is small and light, the dimensions of the shape of the bottle screw portion 37 formed on the cap portion 35 of the bottle can 31 and the cap screw portion 39 of the cap 38 are restricted by the sampling rule and place of the manufacturing process. It can be measured easily and in a short time.

Next explained is the second embodiment of the invention.
FIG. 4 is a diagram showing a second embodiment of the present invention.
The second embodiment is different from the first embodiment in that the adjustment plate 5 is disposed in contact with the one-side inclined surface 4b of the V-groove 3, and the other portions are the first embodiment. It is the same as the form.
In the second embodiment, the adjustment plate 5 having a constant thickness is disposed in contact with the inclined surface 4b on one side of the V-groove 3 so that the outer diameter of the can body 32 can be changed. The axis O ₂ of the cap screw portion 39 is positioned on the axes of the reference contact 17 and the measurement contact 24. That is, both the axis O ₂ of the cap screw portion 39 of the bottle can 30 with cap and the outer diameter of the can body 32 and the axis O ₁ of the bottle can 30 in the first embodiment are both the reference contact 17 and the measurement contact 24. Located on the axis.

The adjustment plate 5 by abutting arranged on one side of the inclined face 4b of the V-groove 3, the axis O ₂ even when measuring the cap threaded portion 39 of the bottle can 30 of different outer diameter axial measurement contacts 24 It held on the line, because the measurement contacts 24 are perpendicular to the axis O ₂ of the cap screw 39, by rotating the cap with bottle cans 30 about the axis O ₂ of the base portion 35, cap screws 39 The reference contact 17 and the measurement contact 24 abut at right angles to the peak portion M or the valley portion R, and the screw depth can be measured easily and accurately.

Next explained is the third embodiment of the invention.
FIG. 5 is a diagram showing a third embodiment of the present invention.
The third embodiment is different from the first embodiment in that the apparatus main body 2 that supports the can body 32 of the bottle can 30 with cap and is rotatable is substantially the same length as the can body 32. And the moving member 10 uses a positioning and fixing screw (not shown) at the end or bottom in the longitudinal direction of the apparatus main body 2 so that a predetermined amount of the apparatus main body 2 is obtained. It is supposed that it can be attached to the position.

  The apparatus main body 2 is formed of engineering plastics such as POM (polyoxymethylene) that is highly wear-resistant and lightweight, and the can body 32 has a V-groove to improve the wear resistance. Guides 9 and 9 plated with chrome are provided on the inclined surfaces 4 a and 4 b of the V-groove 3 so as not to directly contact 3.

  According to the third embodiment, the apparatus main body 2 is formed of engineering plastic, is lightweight, and the moving member 10 is detachable and can be easily reduced in size, so that it can be easily carried and handled. Further, since the guides 9 and 9 having high wear resistance are provided in the V-groove 3, wear of the V-groove 3 is suppressed during work.

  In the above embodiment, the case of measuring the screw depth of the cap screw portion 39 formed on the outer side of the cap 38 of the bottle can 30 with cap has been described, but it is formed on the base portion 35 of the bottle can 31. It may be used to measure the screw depth of the bottle can screw portion 37.

Further, in the above embodiment, the slopes 4a and capped bottle can 30 about the axis O ₁ of the base portion 35, although 4b has been described for rotatably supported by V grooves intersecting 90 °, V The angle of the groove may be other than 90 °, and if the axis O ₁ of the base portion 35 is held at a predetermined position, other shapes such as a trapezoidal shape or a parabolic U shape are used. Also good.
Further, the V groove 3 of the apparatus main body 2 may not be formed over the entire length of the apparatus main body 2.

Moreover, you may arrange | position a wear-resistant block, a roller, etc. so that the axis line of the bottle can 30 with a cap can be hold | maintained on the surface of either one or both of the inclined surfaces 4a and 4b of the V-groove 3.
Further, although the case where the adjustment plate 5 is disposed in contact with the inclined surface 4b has been described, the adjustment plate 5 may be disposed on the inclined surface 4a side, and is disposed on both the inclined surfaces 4a and 4b. May be.

  The case where the reference contact 17 is brought into contact with the crest portion M of the cap screw portion 39 of the bottle can 30 with cap and the measurement contact 24 is brought into contact with the valley portion R of the cap screw portion 39 has been described. 17 may be configured to contact the valley portion R of the cap screw portion 39 and the measurement contact 24 to contact the mountain portion M.

In the above embodiment, the case where the axis O ₁ of the bottle can 31 coincides with the axis O ₁ of the base part 35 has been described. However, when the axis of the bottle can 31 and the base part 35 do not coincide, by around the bottle cans around the axis O ₁ of the base portion 35 by arranging the annular jig around the cylinder 32, it is also possible to rotate the threaded portion 39 or the like to the axis O ₁ around the base part 35.
Moreover, you may use it combining the said embodiment.

It is a perspective view which shows the screw depth measuring device which concerns on the 1st Embodiment of this invention. It is a figure which shows the bottle can with a cap used as the measuring object in the 1st and 2nd embodiment of this invention. It is a figure which shows the principal part of the screw depth measuring device in the 1st Embodiment of this invention. It is a conceptual diagram which shows the screw depth measuring device in the 2nd Embodiment of this invention. It is a conceptual diagram which shows the screw depth measuring device in the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screw depth measuring device 2 Apparatus main body 3 V groove 4a, 4b One side inclined surface 5 Adjustment plate 10 Moving member 17 Reference contact 24 Measurement contact 31 Bottle can 35 Cap part 37 Bottle can screw part 38 Cap 39 Cap screw part M mountain part R valley part

Claims (6)

A screw depth measuring device for measuring the screw depth of a bottle screw part formed on a cap part of a bottle can or a cap screw part formed on an outer peripheral part of a cap attached to the bottle can screw part,
An apparatus main body that rotatably supports the bottle can around the axis of the base part;
A moving member mounted on the apparatus main body so as to be movable forward and backward in the bottle can screw part or the cap screw part direction;
A reference contact provided on the moving member and brought into contact with either one of the crest portion or trough portion of the bottle can screw portion or the cap screw portion;
A screw depth measuring instrument comprising: a measuring contact provided on the moving member so as to be able to advance and retreat in the bottle can screw part or the cap screw part direction and abutting against the other of the peak part and the valley part. . The screw depth measuring instrument according to claim 1,
The device main body includes a V-groove that rotatably supports the body of the bottle can. The screw depth measuring instrument according to claim 1 or 2,
The screw depth measuring instrument, wherein the moving member is urged toward the bottle can screw part or the cap screw part. The screw depth measuring instrument according to claim 2 or 3,
An adjustment plate is provided in contact with at least one inclined surface of the V-groove so as to adjust the central axis of the bottle can screw part or the cap screw part to be held on the axis of the measuring contact. A screw depth measuring instrument characterized by comprising: The screw depth measuring instrument according to any one of claims 2 to 4,
The screw depth measuring instrument, wherein the moving member is detachably attached to the apparatus main body. A screw depth measurement method for measuring a screw depth of a bottle screw portion formed on a cap portion of a bottle can or a cap screw portion formed on an outer peripheral side of a cap attached to the bottle can screw portion,
Holding the bottle can around the axis of the base part and rotating the bottle can around the axis of the base part,
A reference contact is brought into contact with either the crest portion or the trough portion of the bottle can screw portion or the cap screw portion, and the measurement contact is brought into contact with the other of the crest portion or the trough portion. A screw depth measuring method characterized by measuring a screw depth of a screw part.

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