JPS5820920Y2 - Capping device for both ends of concrete specimen - Google Patents

Description

[Detailed description of the invention] Both end faces of a concrete specimen to be subjected to a strength test are required to be parallel to each other, perpendicular to the axis, and smooth.

The present invention involves simultaneously applying capping to both end faces of a concrete specimen taken out from a formed wall or a circular mound-shaped specimen a taken out from a concrete layer, thereby finishing both end faces of specimen a into mutually parallel smooth surfaces. This invention relates to an easy-to-operate device, which will be explained with reference to the drawings.

Reference numeral 1 designates a base whose upper surface is formed into a horizontal table 2. A pair of support plates 3, 3 are provided on the horizontal table 2, and the opposing surfaces are finished to be properly parallel vertical surfaces, and the vertical surfaces are appropriately shaped. A transparent hole 8 of the same size was opened.

In the illustrated example, both support plates 3, 3 are both engaged with dovetail guide portions 9 on both sides of the horizontal base 2, and are movable in the length direction by means of locking screws 11 inserted through long holes 10 provided in the horizontal base 2. However, at least one of the support plates 3 may be adjustable in movement, and the other may be fixed on the base 1. Polished glass plates 4 of appropriate thickness are provided along the respective lines to be detachably attached.

5 is a lower mold having a semicircular receiving surface 5a, which supports the lower half of the edge of the circular concrete specimen a, as described later, and 6 is a half mold symmetrically with the lower mold 5. The upper mold has a circular receiving surface 6a and is matched with the lower mold 5 to cover the upper half of the edge of the specimen a, thus covering the entire circumferential surface of both edges of the specimen a. It is surrounded and held by a lower mold 5 and an upper mold 6, and a notch is formed in the upper part of the upper mold 6 to form a lower injection hole for the capping material.

In the illustrated example, the lower mold 5 is coupled to the dovetail guide portions 9 formed on both sides of the upper part of the base 1 so as to be able to move longitudinally on the base. However, this is not always necessary. It is also possible to simply place it on the stand without needing to connect it to the stand.

In order to perform the capping process in an apparatus configured in this way, it is necessary to use both ends of the circular mound-shaped concrete specimen a pre-formed with a mold or the circular mound-shaped concrete specimen a taken out from the conchnaut layer at the site as a base. Both side support plates 3 on 1,
A removable polished glass plate 4, 4 on the inner surface of each vertical part of 3.
After the lower mold 5 is housed and supported within the receiving surface 5a of the lower mold 5, the upper mold 6 is fitted into the upper half of the end of each specimen a.
After covering and holding the peripheral edges of both ends with the upper and lower molds, as shown in FIG. let

In the illustrated example, the screws 12 are inserted from both sides of the support plate 3 toward both sides of the lower mold 5, and the polished glass plate 4 is pressed between the support plate 3 and the lower mold 5. Therefore, these three parts were joined together, and the upper mold 6 was joined to the lower mold 5 using screws and nuts 13 on both sides. may be used to immovably join them together.

In addition, when the specimen a is supported by the molds 5 and 6 as described above and set in the lower mold 5 between the polished glass plates 4 and 4 on both sides, there is a space between the glass plate 4 and the end face of the specimen a. It is necessary to support the end of the specimen a against the lower mold 5 so as to form a gap in which the capping material can be filled and injected.

Furthermore, when supporting both ends of specimen a on molds 5 and 6,
If the annular rubber piece 14 is fitted in advance to the supporting end of the specimen a as shown in FIG. 1, the specimen a and the receiving surfaces 5a and 6 of the mold
Since the gap formed between the rubber pieces 14 is filled with the rubber piece 14, it is possible to prevent the capping material from leaking outward when the capping material is injected, and to stabilize the connection with the mold.

After the specimen a is set between the polished glass plates 4 and 4 on both sides and supported by the molds 5 and 6 as described above, a mixture of sulfur and an appropriate amount of mineral powder, cement paste, or other suitable material is applied. If the capping material is injected from the injection lower opening formed between the upper mold 6 and the glass plate 4, the capping material will be filled into the gap between the glass plate 4 surface and the end surface of the specimen a, so that it will solidify. After that, the support plate 3, the glass plate 4, and the molds 5 and 6 are uncoupled and the movable support plate 3 is moved to release the clamping pressure at both ends of the specimen a.
When the glass plate 4 and the upper mold 6 at both ends are taken out together with the specimen a, when these are removed, the fifth glass plate 4 and the upper mold 6 are removed.
As shown in the figure, a specimen a whose both ends are straightened with a capping material is obtained, and both end surfaces are correctly parallel and the surface has a mirror-like smoothness when in contact with the polished glass plate 4. During the capping process, the injection status of the capping material can be observed through the see-through hole 11 provided in the support plate 4, and the presence or absence of air bubbles due to air intrusion can be observed, and the solidification status can also be confirmed from the outside. Made the work smoother.

In this way, the capping device according to the present invention has two horizontal bases.
A polished glass plate 4 is removably attached to each inner surface of a pair of vertical support plates 3, 3 provided above, and the ends are placed between the upper and lower molds 5.
, 6 is set horizontally, and the capping material is injected and filled from the injection lower provided in the upper mold 6, so that both ends of the specimen a can be capped at the same time. Since it is easy to take out the glass plate 4 from between the supporting plates 3 and 3, and then the glass plate 4 and the upper mold 6 are removed, demolding is extremely easy, and the capping end faces are correctly parallel to each other and the polished glass Mirror-like smoothness can be easily obtained by the plate 4, and since see-through holes 8 are provided on each vertical surface of the support plates 3 on both sides, the capping condition, for example, the presence or absence of air bubbles, the solidification state, etc., can be observed from the outside. It has the effect of making processing and handling convenient, such as obtaining a good finished product.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; Fig. 1 is a partially cutaway side view, Fig. 2 is a plan view, Fig. 3 is an end view, and Fig. 4 is a partially cutaway side view.
The figure is an exploded perspective view of the vertical support plate and the polished glass plate as well as the upper and lower molds, and FIG. 5 is a perspective view of the specimen with a capping finish. 1...Base, 2...Horizontal stand, 3...
... Vertical support plate, 4 ... Polished glass plate, 5
...Lower mold, 6...Upper mold, 7...
・Inlet, 8...Transparent hole.

Claims (1)

[Scope of utility model registration request] A pair of vertical support plates 3, 3 are attached at both ends of the horizontal base 2 of the base 1 with a gap between them so that at least one of them can be moved in the length direction of the horizontal base 2. a lower mold 5 that receives and supports the lower half edge of the concrete specimen a via a removable polished glass plate 4 along the inner surface;
A removable upper mold 6 is provided that matches the edge of the upper half of the test piece a, and a capping material injection lower is placed between the upper mold 6 and the brushed glass plate 4. A device for capping both end faces of a concrete specimen, which further comprises providing a see-through hole 8 of an appropriate size on the vertical surface of each support plate 3.