WO2013018225A1

WO2013018225A1 - Device for testing water hammer strength of glass bottles

Info

Publication number: WO2013018225A1
Application number: PCT/JP2011/067863
Authority: WO
Inventors: 伸二斎藤; 清知久
Original assignee: 東洋ガラス株式会社
Priority date: 2011-08-04
Filing date: 2011-08-04
Publication date: 2013-02-07
Also published as: JPWO2013018225A1; JP4925380B1

Abstract

In order to enable an accurate test of bottles to be performed consistently without affecting the sealing ability of the caps, a device for testing water hammer strength has a placement plate on which the glass bottles are placed, an affixation means which affixes the glass bottles on the placement plate, a lowering means which lowers the placement plate at acceleration higher than the acceleration of gravity, and a guide means which guides the descent of the placement plate. The placement plate descends vertically because of the guide means, and as a result, the bottles do not tilt and an accurate test can be performed consistently.

Description

Glass bottle water hammer strength test equipment

The present invention relates to an apparatus for testing the water hammer strength of glass bottles.

The water hammer strength test for glass bottles is defined by the “Water Hammer Test Method” of the Japan Glass Bottle Association. This stipulates the water hammer test method for glass bottle packaging cargo.
FIG. 18 is an explanatory diagram of a test according to this rule. In this test, a drop tester (not shown) specified in “JIS Z 0202” is used, and a lower dummy carton 53 (same as the sample) is placed on the drop surface 6 (iron plate having a thickness of 20 mm or more). A case is placed, and one sample carton 52 is placed thereon, and one upper dummy carton 51 (same as the sample) is placed on the sample table of the drop tester. Each carton of the lower dummy, sample, and upper dummy is filled with a specified amount in a bottle by filling it with a specified amount, and with a specified cap, and with a specified packaging, There are many glass bottles in the case.

The sample stage is set so as to have a predetermined drop height (distance between the bottom surface of the upper dummy and the top surface of the sample). For example, the upper dummy is first dropped from the drop height of 30 cm onto the sample and is spaced at an interval of 5 cm. Increase the drop height (if the drop height is 60 cm or more, 10 cm intervals), and even one glass bottle in the sample breaks or repeats the drop test to the specified drop height, and one bottle in the sample However, the water hammer strength is determined by the drop height when it breaks.

The left side of FIG. 18 shows the upper dummy carton 51 before dropping, and the right side shows after falling.
When the upper dummy carton 51 falls on the sample carton 52, the case of the lower dummy carton 53 is deformed, and the glass bottle in the sample carton 52 is suddenly pushed downward. However, the contents (liquid) in the glass bottle remain in their original positions due to inertia, and a vacuum portion is generated at the bottom of the bottle. Immediately thereafter, the contents suddenly drop toward the bottom of the vacuum state, causing a water hammer phenomenon.

The “Water Hammer Test Method” of the Japan Glass Bottle Association does not test the water hammer strength of the glass bottle itself because it measures the water hammer strength of the packaged glass bottle. Hammer strength changes). In addition, since a test cannot be performed unless a carton is prepared, many products are necessary for the test (about 10 cases), and the water hammer strength evaluation cannot be performed in the test production of the bottle / parison design stage. In addition, a great deal of labor is required to carry out the test, such as lifting the carton, checking for bottle breakage, cleaning up after breakage, and checking for carton crushing.

Patent Document 1 listed below discloses a technique that solves such problems, makes it possible to measure the water hammer strength of a glass bottle itself relatively easily, and also enables strength evaluation in test production (bottle / parison design stage). Proposed in

This is because the holding means is provided on the fixed base part via a cushioning material, the contents are filled with the holding means, the cap is attached, the bottle is held above its center of gravity, and the bottle is suspended in the air. Based on the falling energy of the weight when the bottle is broken, the weight is dropped directly or indirectly on the cap to give an impact to the bottle, and the falling energy is gradually increased while the weight is dropped repeatedly. This is a water hammer strength test method for glass bottles to test the water hammer strength of a bottle.

When the weight is dropped directly or indirectly on the cap, the cushion material is deformed, the bottle is pushed down rapidly, and the water hammer phenomenon occurs. When the weight is dropped with the bottle held in a suspended position above its center of gravity, the falling energy of the weight acts on the bottle efficiently, and the weight energy of the weight and the impact applied to the bottle are strongly correlated, causing the bottle to break. The water hammer strength of the bottle can be accurately determined based on the falling energy of the weight.

JP 2009-133708 A

Since the test apparatus of Patent Document 1 requires less glass bottles for testing, it is possible to evaluate the water hammer strength in test production at the design stage of the bottle and parison. (1) On the bottle cap If the weight is dropped and repeated impacts are applied, the sealing performance of the cap may be weakened. (2) When the weight is dropped on the cap, the glass bottle tilts and accurate inspection cannot be performed. (3) Can only inspect one bottle at a time, (4) The cushion material is likely to deteriorate due to repeated drop impacts, and (5) The burden on the worker because the weight is repeatedly raised to a predetermined height. There is also a problem that is large.

The present invention solves the problems of the test apparatus of Patent Document 1, does not apply impact to the bottle opening and does not affect the sealability, and can stably inspect the bottle without tilting during the test. An object is to be able to test a plurality of bottles simultaneously.

[Claim 1]
The present invention includes a mounting plate for mounting a glass bottle, a fixing unit for fixing the glass bottle on the mounting plate, a lowering unit for lowering the mounting plate at an acceleration larger than the gravitational acceleration, It is a water hammer strength test apparatus characterized by having a guide means for guiding the lowering of the mounting plate.

The mounting plate may be any plate as long as it can mount glass bottles, and a plurality of glass bottles may be mounted without being limited to one. The fixing means may be anything as long as it can fix the glass bottle on the mounting plate, and its specific configuration is not important. The lowering means forcibly lowers the mounting plate at an acceleration larger than the gravitational acceleration, such as a means for pulling the mounting plate downward by a spring, an air cylinder, a motor drive, etc., a falling weight, etc. . The guide means may be a rod-shaped object such as a round bar or rail, a plate-shaped object, a mold material, or the like that can guide the mounting plate so that the descent of the mounting plate is vertical. The guide means allows the apparatus to operate stably without tilting the mounting plate and the glass bottle, and enables accurate testing.

[Claim 2]
The present invention further includes a base for supporting the mounting plate via the guide means, wherein the lowering means is provided by connecting the base and the mounting plate, and the mounting plate is positioned below. The water hammer strength test apparatus according to claim 1, wherein the water hammer strength test apparatus is a spring urging the spring.

The mounting plate can be supported on the substrate via the guide means, and the lowering means can be a spring provided to connect the base and the mounting plate and bias the mounting plate downward.

[Claim 3]
The present invention further includes a base for supporting the mounting plate via the guide means, wherein the lowering means is provided by connecting the base and the mounting plate, and the mounting plate is positioned below. The water hammer strength test device according to claim 1, wherein the water hammer strength test device is an air cylinder that is urged toward the air.

Instead of the spring of claim 2, an air cylinder can be adopted as the lowering means.

[Claim 4]
The present invention is the water hammer strength test apparatus according to claim 1, wherein the lowering means is a weight that falls on the mounting plate.

The weight may directly drop and collide with the mounting plate, or may indirectly collide with another member. In short, it is only necessary that the falling energy of the weight is transmitted to the mounting plate and the mounting plate is forcibly lowered.

[Claim 5]
Further, the present invention provides stopper means for holding the weight above the support base, weight guide means for guiding the falling of the weight, temporary holding means for temporarily holding the placing plate in the air, and the stopper means When releasing the weight and causing the weight to fall and collide with the mounting plate, it is detected that the weight has approached the mounting plate, and the temporary holding means is released so that the mounting plate can be lowered The water hammer strength test apparatus according to claim 4, which has a switch.

The present invention is a further embodiment of the invention of claim 4. The stopper means can hold the weight above the support base, and can release the weight and drop it. The weight guide means is a rod-shaped object such as a round bar or a rail, a plate-shaped object, a mold material, or the like, which guides the weight so as to drop vertically. Any temporary holding means may be used as long as the mounting plate can be temporarily held in the air. For example, an air chuck may be used. The proximity switch can detect the approach of the mounting plate, and can be, for example, a laser sensor, a capacitive sensor, a mechanical switch, or the like.

[Claim 6]
Further, the present invention includes a base for supporting the mounting plate via the guide means, and the first cushioning material for reducing the impact of the weight falling on the mounting plate is the weight and the above-described A first cushioning material and a second cushioning material are provided between the mounting plates, and the second buffering material and the third buffering material are provided in order from the top to relieve the impact of the mounting plate descending on the base. Is a two-layer carton material, the contact area with the smaller buffer material of the pressure receiving plate that is compressed from above and below corresponds to the area of the cap that covers the glass bottle, and the third buffer material is 1 The water hammer strength test apparatus according to claim 4, wherein a contact area of the pressure-receiving plate that is compressed by sandwiching the carton material from above and below corresponds to an area of a bottom portion of the glass bottle. .

The present invention is a test apparatus that can easily obtain a result approximate to the test by the “Water Hammer Test Method” of the Japan Glass Bottle Association.

The water hammer strength test apparatus of the present invention does not impair the seal at the mouth of the bottle, does not weaken the seal property, and can inspect stably and accurately without tilting the bottle during the test. Since bottles can be tested at the same time, efficient testing can be performed.

1 is a plan view of a water hammer strength test apparatus 1. FIG. It is a front view which cuts and shows a part of water hammer strength test device. It is a side view which cuts and shows a part of water hammer strength test apparatus 1. FIG. It is a principal part enlarged view of the water hammer strength test apparatus. It is a partially notched front view which shows the state which the mounting board fell from FIG. 2 is a plan view of a water hammer strength test apparatus 2. FIG. It is a front view which notches and shows a part of water hammer strength test apparatus 2. FIG. It is a partially notched front view which shows the state which the mounting board fell from FIG. 3 is a plan view of the water hammer strength test apparatus 3. FIG. It is a front view which notches and shows a part of water hammer strength test apparatus 3. FIG. It is a partially notched front view which shows the state which the mounting board fell from FIG. It is explanatory drawing of the example of a mechanical proximity switch. It is explanatory drawing of the example of a mechanical proximity switch. It is a front view of the water hammer strength test apparatus. It is a front view which shows the state which the mounting board fell from FIG. It is a principal part enlarged view of FIG. It is explanatory drawing of the test method as packaged cargo. It is explanatory drawing of the test method as packaged cargo.

1 to 5 relate to the water hammer strength test apparatus 1 of the embodiment. The test apparatus 1 includes a mounting plate 11, a fixing unit, a lowering unit, a guide unit, a base 12, and the like.

The mounting plate 11 is a rectangular plate, and a guide bar 11a protruding up and down from the four corners is fixed integrally. The base 12 has a slightly thick rectangular plate shape, and a guide hole 12a is drilled in the upper surface of the four corners. A lower end portion of the guide bar 11a is slidably inserted therein, and an elastic material such as sponge is inserted in the bottom of the guide hole 12a. A cushioning material 12b made of a body is inserted. The guide rod 11a and the guide hole 12a are guide means for the mounting plate.

A plurality of (in this case, 15) glass bottles G (which are filled with contents and covered with caps) are placed on the placing plate 11, and the pressing plate 16 is placed thereon, and the retaining ring 11b. It is fixed with. The pressing plate 16 has 15 holes 16a, and the upper end of the glass bottle G is inserted into the hole 16a. The stop ring 11b is ring-shaped and is slidably fitted to the upper portion 11a of the guide bar, but can be fixed at a desired position by turning the handle. The glass bottle G and the pressing plate 16 are fixed by a retaining ring 11b. The pressing plate 16 and the retaining ring 11 b are fixing means for fixing the glass bottle G on the mounting plate 11.

A central hole 12c is formed at the center of the base 12, and the lower part thereof communicates with the female screw hole 12d. The male screw portion of the elevating member 15 is screwed into the female screw hole 12d, and the elevating member 15 moves up and down by rotating the handle 15a. A cam receiving portion 13 is inserted into the central hole 12 c and supported by the elevating member 15. The cam receiver 13 can adjust the height by moving the elevating member 15 up and down. Legs 12 e are formed at the four corners of the lower surface of the base 12.

The upper portion of the cam receiving portion 13 is U-shaped as shown in FIG. 3, and a cam 14 is disposed in the central space thereof, and is pivotally attached to both U-shaped walls. A gear 14 a is fixed to the cam 14. A small gear 14b is engaged with the gear 14a, and the gear 14b rotates by rotating its rotating shaft 14c. Accordingly, when the rotating shaft 14c is rotated, the cam 14 rotates.

A protrusion 11 c is formed at the center of the lower surface of the mounting plate 11, and a roller 11 d is pivotally attached to the tip of the protrusion 11 c, and the outer peripheral surface of the roller 11 d is in contact with the outer peripheral surface of the cam 14. The cam 14 and the roller 11d serve as temporary holding means for temporarily holding the mounting plate in the air.

Coil springs 17 are provided at four locations by connecting the upper surface of the base 12 and the lower surface of the mounting plate 11. The coil spring 17 is a lowering means. In FIGS. 2 and 3, the coil spring 17 biases the mounting plate 11 downward.

2, when the cam 14 is rotated in the direction of the arrow (clockwise), the roller 11 d gets over the maximum diameter portion of the cam 14. Then, the temporary holding by the cam is released, and the placing plate 11 is forcibly lowered together with the glass bottle G by the contraction force of the coil spring 17 which is gravity and the lowering means. At this time, the content (liquid) in the glass bottle remains in its original position due to inertia, and a vacuum portion is generated at the bottom of the bottle. Immediately thereafter, the contents suddenly drop toward the bottom of the vacuum state, causing a water hammer phenomenon.

When the mounting plate 11 descends, the guide bar 11a slides downward in the guide hole 12a, and eventually collides with the buffer material 12b to stop the descent. This state is shown in FIG.

The water hammer strength of a glass bottle is expressed based on the contraction energy of the spring when at least one glass bottle is broken.

The water hammer strength test apparatus 1 'shown in FIG. 6 is a slightly modified version of the test apparatus 1, and the coil spring 17 as the lowering means and the cam 14 as the temporary holding means have the same configuration.

In the test apparatus 1 ′ of FIG. 6, the mounting plate 11 is a rectangular plate, and guide rods 11 a are slidably inserted into through holes at four corners. The base 12 has a slightly thick rectangular plate shape, and guide rods 11a are erected and fixed at the four corners. The guide bar 11a is a guide means for the mounting plate. Further, a cradle 12f and a buffer material 12b are provided on the upper surface.

Posts 11 e are erected from four places on the upper surface of the mounting plate 11. A plurality of (in this case, 15) glass bottles G (which are filled with contents and covered with caps) are placed on the mounting plate 11, and a pressing plate 16 is placed thereon and fixed by a retaining ring 11f. is doing. Fifteen holes are formed in the pressing plate 16, and the upper end portion of the glass bottle G is inserted into the holes. The retaining ring 11f is ring-shaped and is slidably fitted to the support 11e, but can be fixed at a desired position by turning the handle. The glass bottle G and the pressing plate 16 are fixed by a retaining ring 11f. The pressing plate 16, the column 11 e and the retaining ring 11 f are fixing means for fixing the glass bottle G on the mounting plate 11.

6, when the cam 14 is rotated in the direction of the arrow (clockwise), the roller 11 d gets over the maximum diameter portion of the cam 14. Then, the temporary holding by the cam is released, and the placing plate 11 is forcibly lowered together with the glass bottle G by the contraction force of the coil spring 17 which is gravity and the lowering means. The mounting plate 11 slides along a guide bar 11a which is a guide means when lowered. At this time, the content (liquid) in the glass bottle remains in its original position due to inertia, and a vacuum portion is generated at the bottom of the bottle. Immediately thereafter, the contents suddenly drop toward the bottom of the vacuum state, causing a water hammer phenomenon. After the mounting plate 11 is lowered, the mounting plate 11 collides with the cushioning material 12b and stops.

7 to 9 relate to the water hammer strength test apparatus 2 of the embodiment. The test apparatus 2 includes a mounting plate 21, a fixing unit, a lowering unit, a guide unit, a base 22, and the like.

The mounting plate 21 is a rectangular plate, and guide rods 21a are slidably inserted into through holes at four corners. The base 22 has a slightly thick rectangular plate shape, and guide bars 21a are erected and fixed at the four corners. The guide bar 21a is a guide means for the mounting plate. In addition, a pedestal 22a and a buffer material 22b are provided on the upper surface.

Posts 21b are erected from four places on the upper surface of the mounting plate 21. A plurality of (in this case, 15) glass bottles G (filled with contents and covered with a cap) are placed on the mounting plate 21, and a pressing plate 24 is placed thereon and fixed by a retaining ring 21c. is doing. Fifteen holes 24a are formed in the pressing plate 24, and the upper end portion of the glass bottle G is inserted into the holes 24a. The stop ring 21c is ring-shaped and is slidably fitted to the support column 21b, but can be fixed at a desired position by turning the handle. The glass bottle G and the push plate 24 are fixed by a retaining ring 21c. The push plate 24, the column 21 b, and the retaining ring 21 c are fixing means for fixing the glass bottle G on the mounting plate 21.

A central hole 22c is formed in the center of the base 22, and an air cylinder 22d is fixed to the lower part thereof. The upper end of the shaft 21d of the air cylinder is connected and fixed to the lower surface of the mounting plate 21 through the center hole 22c. The air cylinder 22d is a lowering means. In FIG. 8, the air cylinder has a negative pressure, and urges the mounting plate 21 downward. Legs 22 e are formed at the four corners of the lower surface of the base 22.

A locking ring 23d having a claw 23e is slidably fitted on the guide rod 21a protruding upward, and the locking ring 23d is fixed to the upper surface of the mounting plate 21 by welding. Above that, a stopper 23 is provided. The mounting portion 23a of the stopper 23 is slidably fitted to the guide rod 21a protruding upward, but can be fixed at a desired position by turning the handle. A lever 23b is pivotally attached to the mounting portion 23a, and a claw 23c at the tip of the lever 23b is engaged with the claw 23e of the engagement ring 23d. The stopper 23 and the locking ring 23d are temporary holding means, whereby the mounting plate 21 is temporarily held in the air.

When the lever 23b of the stopper 23 is rotated from the state of FIG. 8 and the claw 23c is released from the locking of the claw 23e, the temporary holding of the mounting plate 21 is released, and the air cylinder 22d as gravity and lowering means The glass bottle G is forcibly lowered. At this time, the content (liquid) in the glass bottle remains in its original position due to inertia, and a vacuum portion is generated at the bottom of the bottle. Immediately thereafter, the contents suddenly drop toward the bottom of the vacuum state, causing a water hammer phenomenon.

After the mounting plate 21 is lowered, it collides with the buffer material 22b and stops. This state is shown in FIG.

The water hammer strength of the glass bottle is expressed based on the operating energy of the air cylinder when at least one glass bottle is broken.

10 to 14 relate to the water hammer strength test apparatus 3 of the embodiment. The test apparatus 3 includes a mounting plate 31, a fixing unit, a lowering unit, a guide unit, a base 32, and the like.

The mounting plate 31 is a rectangular plate, and a guide rod 31a protruding up and down from the four corners is fixed integrally. The base 32 has a slightly thick rectangular plate shape, and guide holes 32a are perforated on the upper surfaces of the four corners. A lower end portion of the guide rod 31a is slidably inserted therein, and an elastic material such as sponge is provided at the bottom of the guide hole 32a. A body cushioning material 32b is inserted. The guide bar 31a and the guide hole 32a are guide means for the mounting plate.

Posts 31 b are erected from four places on the upper surface of the mounting plate 31. A plurality of (in this case, 15) glass bottles G (filled with contents and covered with a cap) are placed on the mounting plate 31, and a push plate 34 is placed thereon and fixed by a retaining ring 31c. is doing. Fifteen holes 34a are formed in the pressing plate 34, and the upper end of the glass bottle G is inserted into the hole 34a. The retaining ring 31c is ring-shaped and is slidably fitted to the support column 21b, but can be fixed at a desired position by turning the handle. This is exactly the same as the retaining ring 21c. The glass bottle G and the push plate 34 are fixed by a retaining ring 31c. The push plate 34, the column 31 b and the retaining ring 31 c are fixing means for fixing the glass bottle G on the mounting plate 31.

A central hole 32c is formed at the center of the base 32, and an air cylinder 32d is disposed below the central hole 32c. The upper end of the shaft 31d of the air cylinder passes through the center hole 32c and is fixedly connected to the lower surface of the mounting plate 31. The air cylinder 32d is for pushing up the mounting plate 31 to a predetermined height. Legs 32 e are formed at the four corners of the lower surface of the base 32.

On the upper surface of the base 32, an air chuck 32f is provided on the outer periphery of the shaft 31d as temporary holding means for temporarily holding the mounting plate in the air. The air cylinder 32d pushes the mounting plate 31 up to a predetermined height, and then fixes the shaft with an air chuck 32f. The inside of the air cylinder is opened to the outside air so that the shaft can move freely.

The arm protrudes from the side surface of the base 32, and a proximity switch 32g is provided at the tip. The proximity switch is provided slightly outside the mounting table 31 as shown in FIG.

The descending means of this embodiment is a weight. The weight includes a frame-shaped weight 35 and an adjustment weight 36. The frame-shaped weight 35 has a planar shape shown in FIG. 10, and guide rods 31a are slidably inserted into the four through holes. Therefore, the guide bar 31a serves as weight guide means for guiding the falling of the weight. The adjustment weight 36 is placed on the frame weight 35 as necessary to adjust the weight of the weight.

A locking ring 37 is fixed to the top of the adjustment weight 36. The locking ring 37 is slidably fitted on the guide rod 31a, which is exactly the same as the locking ring 23d. Above that, a stopper 33 is provided. This is exactly the same as the stopper 23 described above, and its mounting portion is slidably fitted to the guide bar 31a, and can be fixed at a desired position by turning the handle. The claw at the end of the lever is engaged with the claw of the engagement ring 37. The stopper 33 and the locking ring 37 serve as stopper means for holding the weight above the support base.

When the lever of the stopper 33 is rotated from the state shown in FIG. 11, the stopper means of the weight is released, and the weight falls on the mounting plate 31. At that time, the proximity switch 32g detects the approach of the weight just before the frame-shaped weight 35 collides with the mounting plate 31, and widens the air chuck 32f to release the temporary holding of the mounting plate 31. Immediately thereafter, the weight collides with the placing plate, and the placing plate 31 is forcibly lowered together with the glass bottle G by the gravity and the collision energy of the weight which is the lowering means. At this time, the content (liquid) in the glass bottle remains in its original position due to inertia, and a vacuum portion is generated at the bottom of the bottle. Immediately thereafter, the contents suddenly drop toward the bottom of the vacuum state, causing a water hammer phenomenon.

13 and 14 are examples of mechanical proximity switches. The proximity switch 32g has a switch lever 32h, and when the switch lever 32h changes from upward to downward, the air chuck 32f expands. The frame-shaped weight 35 is provided with a protrusion 35a protruding outward. As shown in FIG. 13, when the frame-shaped weight 35 drops and passes by the side of the proximity switch 32g, the projection 35a contacts the switch lever 32h and changes it downward, and the air chuck 32f spreads. When the frame weight 35 is raised, the switch lever 32h changes upward as shown in FIG.

When the mounting plate 31 descends, the guide rod 31a slides downward in the guide hole 32a, and eventually collides with the buffer material 32b to stop the descent. This state is shown in FIG.

The water hammer strength of a glass bottle is expressed based on the collision energy of a weight when at least one glass bottle is broken.

15 to 17 relate to the water hammer strength test apparatus 4 of the embodiment. The test apparatus 4 includes a mounting plate 41, a fixing unit, a lowering unit, a guide unit, a base 42, and the like.

The base 42 has a rectangular plate shape, and guide rods 42a are erected and fixed at the four corners of the upper surface. Legs 42b are provided at the four corners of the lower surface.

On the upper surface of the base 42, each of the guide rods at the four corners has one carton material 5 (third buffer material), a pressure receiving plate 48, a pressure receiving plate 49, and two carton materials 5 (second buffer material). The pressure receiving plate 48 is slidably fitted in order from the bottom and stacked. The carton material and the pressure receiving plate are all ring-shaped.

The mounting plate 41 is a rectangular plate having through holes at four corners, and guide rods 42a are slidably inserted into the respective through holes, whereby the mounting plate 41 is vertically moved using the guide rods as guide means. It is possible to move to.

Posts 41a are erected from four places on the upper surface of the mounting plate 41. A plurality of (in this case, 15) glass bottles G (which are filled with contents and covered with a cap) are placed on the mounting plate 41, and a pressing plate 44 is placed thereon and fixed by a retaining ring 41b. is doing. The push plate 44 has 15 holes 44a, and the upper end of the glass bottle G is inserted into the hole 44a. The stop ring 41b is ring-shaped and is slidably fitted to the support column 41a, but can be fixed at a desired position by turning the handle. This is exactly the same as the retaining ring 21c. The glass bottle G and the push plate 44 are fixed by a retaining ring 41b. The push plate 44, the support column 41 a and the retaining ring 41 b are fixing means for fixing the glass bottle G on the mounting plate 41.

On the upper surface of the mounting plate 41, a pressure receiving plate 49 and two carton materials 5 (first buffer materials) are sequentially fitted from the bottom to the guide bars 42a at the four corners so as to be slidable sequentially and stacked.

The descending means of this embodiment is a weight. The weight includes a frame-shaped weight 45 and an adjustment weight 46. The frame-shaped weight 45, the adjustment weight 46, the stopper 43 which is a stopper means for holding the weight above the support base, and the locking ring 47 are exactly the same as the members of the same name in the case of the water hammer strength test apparatus 3 described above. It is a configuration. The guide bar 42a serves as weight guide means for guiding the falling of the weight.

A ring-shaped pressure receiving plate 48 is fixed to the lower surface of the frame-shaped weight 45. The pressure receiving plate 48 is also slidably fitted on the guide rod 42a. The pressure receiving plate 48 may be stacked on the uppermost carton material 5 (first buffer material).

The contact area of all the pressure receiving plates 48 with the carton material 5 is the same, and this contact area corresponds to the area of the bottom of the glass bottle. That is, the sum of the bottom areas of the glass bottles (15 in this case) on the mounting plate is equal to four times the contact area of the pressure receiving plate 48 with the carton material 5 at one place.

The contact area of all the pressure receiving plates 49 with the carton material 5 is the same, and this contact area corresponds to the area of the cap that covers the glass bottle. That is, the total cap area of the glass bottles (15 in this case) on the mounting plate is equal to four times the contact area of the pressure receiving plate 49 with the carton material 5 at one place.

15, when the lever of the stopper 43 is rotated, the stopper means of the weight is released, and the weight falls on the mounting plate 41. Then, all the carton materials 5 are compressed and deformed by the impact, so that the placing plate 41 is lowered rapidly. At this time, the content (liquid) in the glass bottle remains in its original position due to inertia, and a vacuum portion is generated at the bottom of the bottle. Immediately thereafter, the contents suddenly drop toward the bottom of the vacuum state, causing a water hammer phenomenon.

The occurrence of the water hammer phenomenon in this apparatus is very similar to the water hammer phenomenon that occurs in the test as a packaged cargo in FIGS. This will be described by comparing FIG. 17 and FIG. FIG. 19 shows the state when the upper dummy carton 51 is dropped as shown on the right side of FIG. 18 for a vertical row of glass bottles.

17 corresponds to the bottom of the glass bottle G1 in the upper dummy carton 51 that has dropped in FIG.

17 corresponds to the carton material 51b on the bottom surface of the upper dummy carton 51 in FIG. 19, and the carton material 5b in FIG. 17 corresponds to the carton material 52a on the top surface of the sample carton 52 in FIG.

17 corresponds to the cap C2 of the glass bottle G2 in the sample carton 52. The pressure receiving plate 49a shown in FIG.

Since the

first carton materials

5a and 5b in FIG. 17 are compressed by the pressure receiving plate 48a corresponding to the bottom surface of the glass bottle and the pressure receiving plate 49a corresponding to the cap, this compressed state is the same as that of the

carton materials

51b and 51a in FIG. Corresponds to the compressed state. The contact area of the smaller pressure receiving plate 49a of the

pressure receiving plates

48a and 49a that compresses the

first buffering materials

5a and 5b from above and below corresponds to the area of the cap that covers the glass bottle. ing.

17 corresponds to the bottom of the glass bottle G2 in the sample carton 52 in FIG.

17 corresponds to the carton material 52b on the bottom surface of the sample carton 52 in FIG. 19, and the carton material 5d in FIG. 17 corresponds to the carton material 53a on the upper surface of the lower dummy carton 53 in FIG.

17 corresponds to the cap C3 of the glass bottle G3 in the lower dummy carton 53. The pressure receiving plate 49b shown in FIG.

Since the

second carton materials

5c and 5d in FIG. 17 are compressed by the pressure receiving plate 48b corresponding to the bottom surface of the glass bottle and the pressure receiving plate 49b corresponding to the cap, this compressed state is the same as that of the

carton materials

52b and 53a in FIG. Corresponds to the compressed state. The contact area of the smaller pressure receiving plate 49b of the

pressure receiving plates

48b, 49b, which compresses the

second buffer materials

5c, 5d from above and below, corresponds to the area of the cap that covers the glass bottle. ing.

The pressure receiving plate 48c in FIG. 17 corresponds to the bottom surface of the glass bottle G3 in the lower dummy carton 53 in FIG.

The carton material 5e in FIG. 17 corresponds to the carton material 53b on the bottom surface of the lower dummy carton 53 in FIG.

17 corresponds to the dropping surface 6 in FIG. Note that the base 42 in this case also serves as a pressure receiving plate that contacts the lower surface of the buffer material (carton material).

Since the third carton material 5e in FIG. 17 is compressed by the pressure receiving plate 48c corresponding to the bottom surface of the glass bottle and the pressure receiving plate (base 42) corresponding to the dropping surface 6, this compressed state is shown in FIG. This corresponds to the compressed state of the material 53b. The contact area of the smaller pressure receiving plate 48c of the

pressure receiving plates

48c, 42 that compresses the third buffer material 5e from above and below corresponds to the area of the bottom of the glass bottle.

The water hammer strength of the glass bottle in this test apparatus is expressed based on the collision energy of the weight when at least one glass bottle is broken.

Therefore, if the weight of the weight in this test apparatus is made to correspond to the weight of the upper dummy in FIG. 18, the drop height of the weight when the glass bottle is broken is the upper dummy when the glass bottle is broken in FIG. The test result as a conventional packaged cargo can be estimated by the test in this test apparatus. The standard value of the water hammer strength when packed in a carton varies depending on the bottle capacity. A bottle with a large internal capacity has a high carton height, so that the drop height when the cartons are stacked is inevitably low. Even if it is dropped from the height of the chest to the cartons stacked in two steps, the drop height is about 40 to 50 cm, but in the case of a small bottle, this is about 100 cm. Therefore, the required drop strength differs depending on the size of the bottle, and a more practical strength test apparatus can be obtained by simulating the situation of FIG. 18 as much as possible.

In the above embodiment, the number of guide bars is four, but this is not a limitation. Further, the number of glass bottles placed on the placing plate is not limited to 15 and is arbitrary.

DESCRIPTION OF SYMBOLS 1 Test apparatus 11 Mounting plate

11a Guide rod

11b Stop ring

11c Protrusion part 11d Roller 11e Post

11f Stop ring 12 Base

12a Guide hole

12b Buffer material

12c Center hole 12d Female screw hole 12e Leg part 12f Base 13 Cam receiver 14 Cam 14a Gear 14b Gear 14c Rotating shaft 15 Elevating member 15a Handle 16 Push plate 16a Hole 17 Coil spring 2 Test device 21 Mounting plate

21a Guide rod 21b Post

21c Stop ring 21d Shaft 22 Base 22a Base 22b Buffer

22c Central hole

22d Air cylinder

22e Leg portion 23 Stopper

23a Mounting portion 23b Lever 23c Claw

23d Locking ring 23e Claw 24 Push plate 24a hole 3 Test device 31 Mounting plate

31a Guide rod 31b Post

31c Stop ring 31d Shaft 32 Base

32a Id hole

32b Cushioning material

32c Center hole

32d Air cylinder 32e Leg

32f Air chuck

32g Proximity switch

32h Switch lever 33 Stopper 34 Push plate 34a Hole 35 Frame weight 35a Projection 36 Adjustment weight 37 Locking ring 4 Test device 41 Mounting plate 41a Post 41b Stop ring 41c Shaft 42 Base 42a Guide rod 42b Leg 43 Stopper 44 Push plate 44a Hole 45 Frame weight 36 Adjusting weight 47 Locking ring 48 Pressure receiving plate 49 Pressure receiving plate 5 Carton material 6 Falling surface

Claims

A mounting plate for mounting a glass bottle;
Fixing means for fixing the glass bottle on the mounting plate,
Descent means for lowering the mounting plate at an acceleration larger than the gravitational acceleration;
A water hammer strength test apparatus comprising guide means for guiding the descent of the mounting plate.
A base for supporting the mounting plate via the guide means;
The water hammer strength test apparatus according to claim 1, wherein the lowering means is a spring provided by connecting the base and the mounting plate, and biasing the mounting plate downward.
A base for supporting the mounting plate via the guide means;
The water hammer strength test apparatus according to claim 1, wherein the lowering means is an air cylinder that is provided by connecting the base and the mounting plate and urges the mounting plate downward.
The water hammer strength test apparatus according to claim 1, wherein the lowering means is a weight that falls on the mounting plate.
Stopper means for holding the weight above the support;
Weight guide means for guiding the falling of the weight;
Temporary holding means for temporarily holding the mounting plate in the air;
When the weight is dropped by releasing the stopper and colliding with the mounting plate, it is detected that the weight has approached the mounting plate, and the temporary holding device can be released to lower the mounting plate. The water hammer strength test apparatus according to claim 4, further comprising a proximity switch.
A base for supporting the mounting plate via the guide means;
A first cushioning material is provided between the weight and the mounting plate to reduce the impact of the weight falling on the mounting plate.
A second cushioning material and a third cushioning material that relieve the impact of the mounting plate descending on the base are sequentially provided from above,
The first buffer material and the second buffer material are two-layered carton material, and the area of the cap that covers the glass bottle is the contact area with the smaller buffer material of the pressure receiving plate that is sandwiched and compressed from above and below. Corresponding to
The third buffer material is a single carton material, and a contact area with a smaller buffer material of a pressure receiving plate that compresses the third buffer material from above and below corresponds to an area of a bottom portion of the glass bottle. Water hammer strength test equipment.