JP2008044279A - Formwork for testing sample of solidifier such as concrete - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To keep sufficiently water tight at a fitting part in a formwork frame for a testing sample of a solidifier such as concrete composed of compressively fitting a bottom plate to a bottom part of a cylindrical body. <P>SOLUTION: In the formwork 10 for the testing sample forming the testing sample of concrete and the like which is composed of compressively fitting the bottom plate 12 of a synthetic resin to the bottom part of the cylindrical body 11 of a synthetic resin so as to be able to attach and detach, a tapered part diametrically reducing toward a bottom wall 19 is formed at the part where the bottom plate 12 of the bottom part of the cylindrical body 11 is compressively fitted. Rooms 22 for forming a heat insulating layer 20 are provided by outwardly fitting an outercoat 13 through protruding rows 21 around a circumference of the cylindrical body 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mold for a specimen for molding a specimen of a solidified material such as concrete to be subjected to a strength test.

The concrete specimen used for the strength test is a columnar body having a height twice as large as the diameter, and the filling of the concrete into the mold for the specimen is based on the method for making the specimen for strength test of JIS1132. Done according to
Conventionally, as this type of form for concrete specimens, Patent Document 1 or the like is known in which a bottom plate is press-fitted into the bottom of a transparent or translucent synthetic resin tubular body.
In general, the concrete specimen is mainly manufactured by filling the collected concrete sample into the mold, leaving it until the concrete is hardened, and then leaving it until the concrete specimen is sufficiently cured. And a demolding step of removing the concrete specimen from the mold.

  In such a concrete specimen form, it is necessary to press the bottom plate or the molded specimen itself from the lower part to remove the mold, so that the bottom plate or the specimen can be removed by air pressure or mechanical operating force. However, when air pressure is used, it is necessary to provide an introduction passage for the air pressure, the structure becomes relatively complicated, and the case where mechanical operating force is used is also included. When press-fitting the bottom plate into the bottom of the body, the sample is filled and stored for a long time, so it is necessary to completely prevent leakage of the liquid in the sample, so a sealing member is installed around the bottom plate. For example, the manufacturing process is complicated and the manufacturing cost is increased.

In addition, in the production of such a concrete specimen, as described above, there is a process of leaving for a long time for curing and curing, and this is a problem when the operator carefully handles and stores the formwork. However, if the formwork containing the concrete specimen is left in a place where it is exposed to direct sunlight, the concrete specimen in the middle of production will be abnormally heated, and a good quality concrete specimen will be obtained by the diffusion and heating of moisture. I can't. However, such an environment for curing and curing is usually left to the worker, and an appropriate specimen is not always obtained.
In addition, although the formwork which shape | molds a concrete test body was described here, it is the solidification material which mixed the solidification material in order to solidify it in a part of ground, or other materials for civil engineering construction, The same applies to a mold for molding a specimen to be subjected to a strength test.
JP 2001-205612 A

  The technical problem of the present invention is to make the bottom plate of the cylindrical body sufficiently watertight and press-fitable with a simple structure in a mold for a specimen such as the synthetic resin concrete. In addition, it is to place a specimen under curing or curing in an appropriate environment so that a specimen having a high quality can be manufactured.

In order to solve the above-mentioned problems, a mold for a solid material specimen such as concrete according to the present invention is made of a synthetic resin at a fitting position formed on a step portion provided at the bottom of a cylindrical body made of synthetic resin. A mold for a specimen for molding a solidified specimen such as concrete which is press-fitted into a bottom plate and pressed from the bottom of the cylindrical body so as to be removable from the cylindrical body. The bottom plate and the bottom plate are formed of a synthetic resin that is press-fitted together by minute elastic deformation, and the bottom plate is fitted into the fitting portion where the bottom plate in the cylindrical body is press-fitted, and the diameter of the bottom plate is reduced. A tapered portion is formed, and water tightness around the bottom plate can be secured by press fitting the bottom plate to the tapered portion.
The bottom plate may have a flat surface with no change in the thickness direction or an arc-shaped cross section with a small curvature, but a plurality of annular seals that are elastically deformed when fitted into a cylindrical body. It is desirable to integrally form the convex portions for use.
In a preferred embodiment of the above-mentioned specimen mold according to the present invention, the step portion at the bottom of the cylindrical body is formed by a bottom wall having a hole for removing the bottom plate.

In another preferable embodiment of the specimen mold according to the present invention, a heat insulating layer having a low thermal conductivity is formed on the cylindrical body or on the outer periphery thereof. In this case, a jacket body fitted around the cylindrical body is provided, and the protrusions or protrusions formed on the mutually facing surfaces of one of the cylindrical body and the jacket body are in contact with the other facing surface. The space for forming the heat insulating layer may be provided between the protrusions or the protrusions, but a plurality of annular protrusions having the same height protrude from the outer peripheral surface of the cylindrical body. The outer shell is formed into a cylindrical shape that is fitted so as to abut against the ridge, and a heat insulating layer is formed by a space between the cylindrical body and the outer shell. desirable.
The jacket body may be made of a synthetic resin, but it has a winding paper layer that can be sequentially peeled in which a large number of recording papers prepared for a specimen to be molded are wound in a cylindrical shape, and a heat insulating layer is provided on the outer shell layer. Can also be formed. Further, the heat insulating layer may be formed by a plurality of hollow spaces extending in parallel to the central axis in the cylindrical body without using the outer shell.

  In another preferred embodiment of the above-mentioned specimen mold according to the present invention, a record capable of describing a plurality of production records for the specimen on the outer peripheral surface of the cylindrical body or the outer shell located outside the above-mentioned mold. A sheet is pasted so that the production records can be peeled in sequence, and the cylindrical body has a lid that adheres to the upper end of the cylindrical body. Slight protrusions are formed on the inner peripheral surface of the tip of each part, and the protrusions are compressed and engaged with each other when the lid is attached to the cylindrical body, and the cylindrical body and the lid are sealed. It is comprised as what formed the sealed structure.

In the above-described present invention, in a mold for a specimen such as a synthetic resin concrete, a tapered portion that is reduced in diameter toward the bottom surface is formed in a fitting portion where the bottom plate of the bottom portion in the cylindrical body is press-fitted. Therefore, when the bottom plate is press-fitted, the synthetic resin material is compressed and elastically deformed at the fitting portion, and water-tightness at the fitting portion is sufficiently secured, and there is no need to use a seal member, and the configuration Is extremely easy.
Further, since the heat insulating layer having a low thermal conductivity is provided on the cylindrical body, the specimen under curing or curing can be placed in an appropriate environment to produce a specimen with good quality.

1 to 5 show a first embodiment of a form for a solid specimen such as concrete according to the present invention. A sample form 10 of the first embodiment includes a cylindrical body 11 made of synthetic resin, a bottom plate 12 made of synthetic resin and detachably press-fitted to the bottom of the cylindrical body 11, and the above cylindrical shape. An outer shell 13 that fits around the body 11 and a lid 14 that is made of synthetic resin and is attached to the cylindrical body 11 are provided.
The synthetic resin cylindrical body 11 is configured such that the synthetic resin bottom plate 12 is press-fitted into a fitting position formed by a step portion 17 provided at the bottom thereof. The step portion 17 is formed by molding. When the specimen is removed from the mold 10, it is formed by a part of the bottom wall 15 integral with the cylindrical body 11 having the bottom plate removal hole 16 into which a push rod or the like is inserted. It may be formed only on the inner periphery of the cylindrical body 11.
In addition, on the inner surface of the cylindrical body 11, in order to facilitate the molding of the cylindrical body 11 itself and the demolding of the material for the test specimen filled in the cylindrical body 11, the cylindrical body 11 is slightly above the standard dimension tolerance. An open taper is attached.

And the taper part (refer Fig.3 (a) of FIG. 3) for the baseplate press-fit which diameter-reduces toward the lower part is formed in the fitting part 18 by which the baseplate 12 in the cylindrical body 11 is press-fit, The said baseplate By fitting 12 to the tapered portion, water tightness around the bottom plate 12 can be secured. The peripheral surface of the bottom plate 12 does not need to follow the shape of the tapered portion, and changes in the thickness direction of the bottom plate 12 as shown in FIG. It can be formed in a flat shape without any shape (cylindrical surface around the bottom plate as a whole). Also, as shown in FIG. 3C, a plurality of annular sealing convex portions 12a that are elastically deformed when fitted into the cylindrical body 11 are integrally formed on the peripheral surface of the bottom plate 12. It can be. In this case, since the width of the convex portion 12a is smaller than the thickness of the bottom plate 12, the convex portion 12a can be easily deformed when the bottom plate 12 is fitted, and the bottom plate 12 can be press-fitted, and the convex portion can be crushed. Sealing around the bottom plate 12 can be performed reliably.
In addition, since the taper part for bottom plate press-fit provided in the fitting part 18 of the bottom plate 12 in the said cylindrical body 11 is provided only in the part which the said bottom plate 12 fits, it influences the shape of a test body. It is not a thing.

As the synthetic resin constituting the cylindrical body 11 and the bottom plate 12, since the cylindrical body 11 and the bottom plate 12 need to be press-fitted together by minute elastic deformation, a synthetic resin material suitable for it, For example, it is desirable to use polypropylene or polyethylene. Further, as the synthetic resin used for forming the cylindrical body 11, it is desirable to use a resin having excellent release properties of the specimen material such as concrete, but a release agent is applied to the inner surface of the cylindrical body 11. You can also
For example, as shown in FIG. 3, when the thickness of the bottom plate 12 having a circular cross section is 3 mm, the tapered portion has a fitting portion 18 of the bottom plate 12 having the same length as the thickness of the bottom plate 12, and the tapered portion is a stepped portion. What is necessary is just to reduce the diameter by 0.1 mm on the portion 17.

On the other hand, the cylindrical body 11 is provided with a heat insulating layer 20 having low thermal conductivity around it. In this first embodiment, a plurality of annular protrusions of the same height are formed on the outer peripheral surface of the cylindrical body 11. A sleeve 21 made of synthetic resin, which is formed in a cylindrical shape that protrudes from the rib 21 and is fitted so as to come into contact with the tip of the rib 21, is fitted into the cylindrical body 11, and the cylindrical body 11 is fitted. The heat insulating layer 20 is formed by the space 22 between the outer shell 13 and the outer shell 13.
The cylindrical body 11 is provided with flanges 24 and 25 projecting outward at the upper and lower ends thereof, and the flanges 24 and 25 are also provided with portions having the same height as the ridges 21 so as to provide a jacket. The body 13 is formed so as to be fitted to that portion, and the outer shell 13 is placed on the upper surface of the protruding portion 25 a of the flange 25 at the lower end of the cylindrical body 11. The flange 25 at the lower end of the cylindrical body 11 can be used to fix the mold 10 when the molded specimen is removed.

  In the first embodiment, a plurality of protrusions 21 are annularly projected on the outer periphery of the cylindrical body 11, but the protrusions 21 are in a direction parallel to the central axis of the cylindrical body 11. It may be suitable. Moreover, it can replace with the said protrusion 21 and can provide many protrusions of the same height. Furthermore, a similar protrusion or protrusion can be provided on the inner surface of the outer shell 13. In short, the protrusions or protrusions formed on the opposing surfaces of the cylindrical body 11 and the outer shell 13 are brought into contact with the other opposing surface, thereby forming the heat insulating layer 20 between the protrusions or protrusions. A space 22 can be provided.

  In order to attach the lid body 14 to the upper end portion of the cylindrical body 11, the outer peripheral surface of the flange 24 and the inner peripheral surface of the tip end portion of the annular adherent portion 27 of the lid body 14 at the upper end portion of the cylindrical body 11 are As shown in FIGS. 4 and 5, slight protrusions 28 and 29 are formed, and the protrusions 28 and 29 are compressed and engaged with each other when the lid 14 is attached to the cylindrical body 11. A sealing structure is formed in which the space between the body 11 and the lid 14 is sealed.

  For example, as shown in FIG. 4, the protruding portion 28 on the outer peripheral surface of the upper end portion of the cylindrical body 11 increases in diameter downward within a range of 1 to 2 mm from the upper end of the flange 24 of the cylindrical body 11. The maximum height of the protruding portion 28 is about 0.05 mm, and the lower end of the protruding portion 28 returns to the outer cylindrical surface of the cylindrical body through the step 28a. Further, the protruding portion 29 of the lid body 14 is inclined to the inside of the annular adherent portion 27 from the inner surface tip of the annular adherent portion 27 and protrudes inward by 0.05 mm at a position 0.5 mm above. It is. Thus, when the lid body 14 is attached to the upper end portion of the cylindrical body 11, the annular projection portion 28 on the outer periphery of the upper end portion of the cylindrical body 11 and the annular projection portion on the inner end portion of the annular portion 22 of the lid body 14. 29 is compressed and engaged, and as a result, the space between the lid 14 and the cylindrical body 11 is sealed.

The outer shell 13 in the above-described specimen mold 10 is formed of a synthetic resin cylinder. However, the casing is not limited to the synthetic resin, and is a paper cylinder or other arbitrary cylinder having a low thermal conductivity. It can be formed by a member.
In that case, various records on the specimen to be molded, such as the date of filling concrete for the specimen, construction place, name of related contractor, etc. And the wound paper layer itself, or the wound paper layer supported by a base cylinder is used as the outer shell 13, and the wound paper layer is also part of the heat insulating layer 20. It is also possible to demonstrate the function.
In addition, a plurality of recording papers can be recorded on the outer peripheral surface of the synthetic resin outer shell 13 of the mold 10 without using the outer shell made of a wound paper layer as described above. Can be attached in such a manner that they can be sequentially peeled off.

The mold 10 for a solidified material specimen such as concrete having the above-described configuration is not only formed of a concrete specimen used for a strength test, but also includes, for example, a solidified material for solidifying it in a part of the ground. It is a caking material or other material for civil engineering and construction, and can be used for molding various solidified specimens used for strength tests.
When molding these specimens, the sampled concrete or the like is filled in a cylindrical body 11 with a bottom plate 12 press-fitted to the bottom and cured, and after the specimen is sufficiently cured. The specimen is taken out from the mold 10. When the mold is removed, the specimen 12 is pressed together with the bottom plate 12 by pressing the bottom plate 12 through the hole 16 in the bottom wall 15 at the bottom of the cylindrical body 11. 11 can be removed.
Since the cylindrical body 11 is provided with a heat insulating layer 20 having low thermal conductivity, even if the mold 10 is left in a place exposed to direct sunlight during hardening or curing of concrete or the like, the cylindrical body 11 is provided. The specimen is not abnormally heated, and the deterioration of quality due to moisture diffusion and heating can be suppressed.

When the bottom plate 12 is press-fitted into the bottom of the cylindrical body 11, they are press-fitted together by minute elastic deformation, and when the specimen is taken out together with the bottom plate 12 after forming the specimen, the tapered portion Is restored to its original shape, so that the above-mentioned specimen mold 10 can be used repeatedly.
Moreover, since the taper part is formed in the fitting part 18 by which the bottom plate 12 of the bottom part in the said cylindrical body 11 is press-fit, a synthetic resin material is compressed in the fitting part at the time of press-fitting of the bottom plate 12. It is elastically deformed, and watertightness at the fitting portion 18 is sufficiently ensured, and there is no need to use a seal member, and the configuration for maintaining watertightness becomes extremely simple.

6 and 7 show a second embodiment of the test mold according to the present invention. The mold 30 of the second embodiment is different from the first embodiment mainly in the configuration of the heat insulating layer 20, and there is no particular difference in the other configurations. Portions common to the examples are denoted by the same reference numerals as those in the first embodiment, and description thereof is simplified or omitted.
That is, in the second embodiment, the heat insulating layer 20 is extended in the cylindrical body 31 in parallel to the central axis without using the one corresponding to the outer shell 13 of the first embodiment. A plurality of hollow spaces 32 are formed. The space 32 passes through the cylindrical body 31 in parallel with the central axis of the cylindrical body 31 and opens on the upper and lower surfaces of the cylindrical body 31. The space 32 is appropriately filled with a heat insulating material. It is also possible to close one end, for example, the upper end.

  Other configurations in the second embodiment, for example, a configuration in which a taper portion whose diameter decreases toward the lower portion is formed in a portion where the bottom plate 12 of the bottom portion of the cylindrical body 31 is press-fitted, The configuration for sealingly adhering to the body 31 is substantially the same as in the first embodiment.

1 is a longitudinal sectional view showing a first embodiment of a mold according to the present invention. It is the horizontal sectional view. (A) is an enlarged cross-sectional view of a portion where the bottom plate is press-fitted in the same embodiment, (b) is an enlarged cross-sectional view of the peripheral portion of the bottom plate before press-fitting, and (c) is the other peripheral portion of the bottom plate before press-fitting. It is an expanded sectional view. It is an expanded sectional view of the upper end part outer peripheral surface of the cylindrical body in the Example. It is an expanded sectional view of the adherence part of the lid in the example. It is a longitudinal cross-sectional view which shows 2nd Example of the formwork which concerns on this invention. It is the horizontal sectional view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,30 Formwork 11,31 Cylindrical body 12 Bottom plate 12a Sealing convex part 13 Outer body 14 Cover body 15 Bottom wall 16 Hole 17 Step part 18 Fitting part 20 Thermal insulation layer 21 Projection 22, 32 Space 27 Annular deposition Part 28, 29 Protruding part

Claims (10)

A synthetic resin bottom plate is press-fitted into a fitting position formed on a step portion provided at the bottom of the synthetic resin cylindrical body, and the bottom plate is pressed from the bottom of the cylindrical body to thereby form the cylindrical body. A mold for a specimen for molding a specimen of a solidified material such as concrete that can be detached from the specimen,
The cylindrical body and the bottom plate are formed of a synthetic resin that is press-fitted together by fine elastic deformation,
A bottom plate press-fitting taper portion that is reduced in diameter toward the lower portion is formed in a fitting portion in which the bottom plate in the cylindrical body is press-fitted, and watertight around the bottom plate is achieved by press-fitting the bottom plate to the taper portion. Made possible,
A form for a specimen of a solidified material such as concrete. On the peripheral surface of the bottom plate, a plurality of annular sealing convex portions that are elastically deformed when fitted into a cylindrical body are integrally formed.
A mold for a solidified material specimen such as concrete according to claim 1 or 2. The step portion at the bottom of the cylindrical body is formed by a bottom wall having a hole for bottom plate removal operation,
A mold for a solidified material specimen such as concrete according to claim 1 or 2. A heat insulating layer having a low thermal conductivity is formed on the cylindrical body or the outer periphery thereof,
A mold for a solidified material specimen such as concrete according to any one of claims 1 to 3. A jacket that fits around the cylindrical body, and a protrusion or a ridge formed on the opposing surface of one of the cylindrical body and the jacket is in contact with the other opposing surface; Or a space for forming the heat insulating layer is provided between the ridges,
A form for a specimen of a solidified material such as concrete according to claim 4. A plurality of annular projections having the same height are provided on the outer peripheral surface of the cylindrical body, and the outer body is formed in a cylindrical shape so as to be in contact with the protrusions. The cylindrical body and the outer body A heat insulation layer is formed by the space between
A form for a specimen of a solidified material such as concrete according to claim 5. The outer shell has a sequentially peelable wound paper layer in which a large number of recording papers for a specimen to be molded are wound in a cylindrical shape, and this forms a part of the heat insulating layer.
A mold for a solidified material specimen such as concrete according to claim 6. Affixing a recording sheet that can describe a plurality of production records for the specimen on the outer peripheral surface of the cylindrical body or the outer shell located outside the mold, the production records can be peeled sequentially,
A mold for a specimen for a solidified material such as concrete according to any one of claims 1 to 6. The heat insulating layer is formed by a plurality of hollow spaces extending parallel to the central axis in the cylindrical body,
A form for a specimen of a solidified material such as concrete according to claim 4. The cylindrical body has a lid that adheres to the upper end thereof, and a slight protrusion is formed on the outer peripheral surface of the upper end of the cylindrical body and the inner peripheral surface of the tip end of the annular adherend of the lid. When the lid is attached to the cylindrical body, the protrusions are compressed and engaged with each other to form a sealing structure that seals between the cylindrical body and the lid.
A mold for a specimen for solidified material such as concrete according to any one of claims 1 to 9.

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