JP5586105B2 - Water stop ring - Google Patents

Description

  The present invention relates to a water-stop ring that is disposed between opposing frame plates of a concrete mold and is fitted into a rod-shaped separator that holds the space between the frame plates at a predetermined interval.

For example, as shown in FIG. 5, a concrete structure such as a reinforced concrete building is formed by first arranging a pair of frame plates 1a and 1a in parallel to form a concrete mold 1 and then the frame plate 1a. It is constructed by placing concrete a in 1a. At this time, a rod-shaped separator 2 is provided between the two frame plates 1a and 1a, and the separator 2 maintains a predetermined dimension of the mold 1 and keeps the distance between the opposed frame plates 1a and 1a constant. (See Patent Document 1 FIG. 1).
At this time, as an aspect in which the separator 2 is not bound to the reinforcing bar 3, there is one shown in FIGS. 5A and 5B, and as an aspect in which the separator 2 is bound to the reinforcing bar 3, what is shown in FIG. There is. In the figure, 5 is a P (P) con, and 6 is a tightening nut (home tie (registered trademark) ). The P con 5 and the nut 6 hold the frame plate 1a with the separator 2 to a predetermined size.

When a concrete structure using the separator 2 is constructed, the concrete a is a fluid, and after the concrete a is placed, the concrete a undergoes volume shrinkage (breathing) as it hardens. A gap is easily generated between the lower portion of the separator 2 and the concrete a. Water enters from the one side of the concrete to the other side through the gap, causing water leakage.
In order to prevent this water leakage, as shown in FIG. 5, a water stop ring 4 is fitted into the separator 2, the water stop ring 4 is embedded in the concrete a, and the embedded water stop ring having a volume expansion function is provided. 4, even if a gap is generated between the separator 2 and the concrete a and water enters from the one side of the concrete a to the other side through the gap, the water is stopped by the water stop ring 4. Intrusion is prevented and water is stopped (see Patent Document 1, paragraph 0002, FIG. 1).

JP 2009-174187 A

  Normally, the water stop ring 4 is fitted into the separator 2 with a hand (finger) and moved to a predetermined position such as an intermediate position (see FIG. 5). On the other hand, as can be understood from FIG. 5, there are a large number of separators 2 provided in the mold 1, and naturally, the number of water-stop rings 4 attached to the separators 2 is also increased. At this time, since the lubricant is attached to the separator 2 to process the rolling screw at both ends, the lubricant adheres to the operator's hand, and the water stop ring 4 cannot be picked smoothly. The water stop ring 4 is not easily fitted into the separator 2. That is, there is a problem of poor workability.

  This invention makes it a subject to improve the workability | operativity of attachment to the separator of the water stop ring 4 under the said actual condition.

In order to achieve the above object, the present invention provides a knob projection on the outer peripheral surface of the main body of the water stop ring.
If there is a protrusion on the outer peripheral surface of the water stop ring body, you can easily slip it by hooking your finger on the protrusion, so even if lubricating oil adheres to the finger, you can easily pick up the water stop ring and install it It can be made to change, and it can be made to fit in a separator by being inserted in a separator.

A specific configuration of the present invention is a water stop ring that is disposed between opposing frame plates of a concrete mold and is fitted into a rod-shaped separator that holds the space between the frame plates at a predetermined interval. The structure which provided the protrusion for picking in the outer peripheral surface of can be employ | adopted.
At this time, if the knob protrusion protrudes in the radial direction of the annular main body, the protrusion can be easily picked up, the inner peripheral surface opening of the annular main body can be easily opened, and the water stop ring can be easily fitted. It improves (refer FIGS. 1-3). Moreover, if the protrusion is provided on one side of the outer peripheral surface of the annular body (see FIGS. 1 to 3), the pinching and bending force concentrates on the one side and the water-stop ring body is easily bent. For this reason, a water stop ring can be easily fitted by a separator and can be attached to a predetermined position.
In addition, if an annular protrusion extending in the axial direction is provided on one side of the inner peripheral surface of the annular body, and the inner peripheral surface of the protrusion is pressed against the outer peripheral surface of the separator, the water stop ring is attached to the separator. In addition to improving strength, it is possible to prevent water intrusion by increasing the creeping distance on the outer surface of the water stop ring through which water that has entered from one side of the concrete to the other through the gap between the separator and the concrete is transmitted. it can.
Furthermore, if the other side edge of the inner peripheral surface of the annular body is an inclined surface (tapered surface) that spreads outward from the axis, the opening that becomes the tapered surface can be easily opened. The water stop ring can be smoothly fitted (attached) to the separator.

  According to the present invention, since the knob protrusion is provided as described above, even if the finger becomes slippery, it is possible to reduce the possibility that the workability of attaching the water stop ring to the separator is reduced.

The perspective view of one embodiment of the water stop ring concerning this invention Cross-sectional view of the same embodiment (A), (b) is each sectional drawing of each other embodiment. (A), (b) is each sectional drawing of each other embodiment. (A)-(c) is a schematic sectional view of each example of a concrete structure

An embodiment of the present invention is shown in FIGS. 1 and 2, and the water-stop ring 10 is made of a water-expandable material such as rubber, as in the prior art, and is formed of a ring-shaped (annular) body 11 having a square cross section. A flange-like protrusion 12 protruding in the radial direction (vertical direction in FIG. 2) is provided on the entire circumference of one side of the outer peripheral surface 11a, and the axial direction (the horizontal direction in FIG. ) Is provided. Further, the other side edge of the inner peripheral surface 11b of the ring-shaped main body 11 is chamfered 14 with an inclined surface (tapered surface) extending outward from the axis.
The cross-sectional shape of both the protrusions 12 and 13 is arbitrary as long as the effect | action of each protrusion 12 and 13 is exhibited, For example, triangular shape, square shape, semicircle shape, semi-ellipse shape etc. can be considered. Further, the protrusion 12 may not be the entire length of the entire circumference or may be intermittent, and the protrusion 12 may be intermittent as long as the following action can be exhibited. The dimensions of the projections 12 and 13 are, for example, the dimensions shown in FIG. 2 when the rod-like diameter of the separator 2 is 6 mm (for 8 mm).

This water-stop ring 10 is also used in various concrete structures such as the embodiment shown in FIGS. 5A to 5C, as in the prior art. Is sandwiched between fingers and bent as shown by a chain line in FIG. 2, and the other side of the inner peripheral surface 11b is expanded and fitted into the separator 2 from one end thereof. The water stop ring 10 is fitted from the chamfer 14 side opening (right side opening in FIG. 2).
At this time, even if the lubricating oil adheres to the finger and becomes slippery, the water stop ring 10 can be easily picked and deformed by the protrusion 12 and can be fitted into the separator 2 and moved to a predetermined position. Moreover, since the protrusion 12 protrudes in the radial direction of the ring-shaped main body 11, the chamfered 14 side opening is easy to open and fit.

The water stop ring 10 fitted into the separator 2 absorbs water in the concrete a and expands, the inner peripheral surface 11b is reduced in diameter and is firmly pressed against the separator 2, and the water enters through the interface. Stop effectively. At this time, since the protrusion 13 on the inner peripheral surface 11b is also pressed against the entire outer periphery of the separator 2, the strength of the water stop ring 10 attached to the separator 2 is higher than that of the water stop ring 4 that does not have the protrusion 13. It becomes.
Further, even if a gap is generated between the separator 2 and the concrete and water enters from the one side of the concrete a to the other side through the gap, the water stop ring 10 prevents the water from entering. Stop the water. At this time, since the creeping distance along the outer peripheral surface of the water stop ring 10 is increased by the protrusion 12 on the outer peripheral surface 11a and the protrusion 13 on the inner peripheral surface 11b, the possibility that the water will get over the water stop ring 10 is extremely high. The water stop effect is lower than the water stop ring 4 that does not have the protrusions 12 and 13.

The protrusion 12 on the outer peripheral surface 11a can be provided on the other side of the outer peripheral surface 11a, in the middle, or only on the other side, as shown by the chain line in FIG. Moreover, as shown in the figure, the protrusion 13 on the inner peripheral surface 11b can be omitted. Furthermore, as shown in FIG. 4, it can project from the outer peripheral surface 11a in one side axial direction, and at this time, it can project from the outer peripheral surface 11a in the radial direction (FIG. 4A). The surface 11a and its outer surface can be flush with each other (FIG. (B)), or can be provided slightly radially inward from the outer peripheral surface 11a (chain line in FIG. (A)).
Thus, the formation position and presence / absence of the protrusions 12 and 13 (only the protrusion 13) are arbitrary as long as they can exert their effects. Furthermore, when the diameter of the separator 2 is 7 mm (for 9 mm), for example, the dimensions of each part can be as shown in FIG.

DESCRIPTION OF SYMBOLS 1 Formwork 1a Frame board 2 Separator 3 Reinforcement 4 Water stop ring 5 Wood cone 6 Clamping nut 10 Water stop ring 11 Ring-shaped (annular) main body 11a Ring main body outer peripheral surface 11b Ring main body inner peripheral surface 12 Projection 13 on outer peripheral surface Inner peripheral surface protrusion 14 Chamfer (tapered surface)

Claims (4)

A water stop ring (between the frame plates (1a, 1a) of the concrete mold (1) and fitted into a rod-like separator (2) that holds the frame plates (1a, 1a) at a predetermined interval. 10)
An annular body (11) Rutotomoni knob protrusions (12) provided on the outer peripheral surface of the front inner peripheral surface (11b) inclined surface extending the other side edge to the axial center outward of Kien annular body (11) ( 14) The water-stop ring characterized by being made.   The water stop ring according to claim 1, wherein the protrusion (12) protrudes in a radial direction of the annular body (11).   The water stop ring according to claim 1 or 2, wherein the protrusion (12) is provided on one side of the outer peripheral surface (11a) of the annular body (11). The inner peripheral surface of the annular body (11) and (11b) an annular projection extending to one side in the axial direction (13) is provided, pressed against the outer circumferential surface of the protrusion inner peripheral surface (13) of the separator (2) The water stop ring according to any one of claims 1 to 3, wherein the water stop ring is provided.

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