JP3142154U - Ring plate for peeling formwork - Google Patents

Abstract

The present invention relates to a shape of a mold shaft insertion hole in a ring plate for peeling a mold used for placing concrete, which can be shared by separators of various shapes regardless of the presence or absence of bulging protrusions, and moreover on the inner surface of the mold. Provided is a peeling ring plate that can be uniformly pressed against a wide surface and can be smoothly peeled off.
A peeling ring is provided because both ends of a U-shaped wire U are inserted into through holes H and H opened at right angles to the positions of concave notches 11 and 11 and welded on the back surface. A region having a large area other than the concave notched portions 11 and 11 in the plate R can be brought into pressure contact with the inner surface of the mold and the mold can be peeled off from the concrete surface. As a result, the pulling force by the U-shaped wire U acts uniformly on the entire surface of the peeling ring plate R.
[Selection] Figure 7

Description

The present invention relates to the shape of a mold shaft insertion hole in a ring plate for peeling a mold used for placing concrete.

The inventor of the present application has proposed a method for effectively peeling a formwork from a concrete surface by using a ring plate 3 for peeling as shown in FIGS. 9 and 11 in Japanese Patent Laid-Open No. 2003-213930.
FIG. 9 is a perspective view of a cup-type separator. A washer-shaped ring plate 3 is built in the cup 1 with the separator 2 inserted into the cup 1, and the mold shaft 2 a is inserted into the center hole 4 of the ring plate 3. It penetrates.
A pulling wire 5 is bound and connected to the ring plate 3.

A plastic cone (hereinafter abbreviated as “P cone”) P type separator as shown in FIG. Further, in both cases of the cup type and the P cone type, the blade is about 1 to 3 mm in the 180 degree direction at the base portion of the mold shaft 2a at the tip of the separator 2, that is, the mold position outside the cup 1 or the P cone P. There are also many types having bulging protrusions 9 and 9 extruded into a shape.

FIG. 11 is a longitudinal sectional view showing a state in which the concrete 7 is placed between the molds 6 and 6 and is in a curing state. The binding wires 5 and 5 for binding the P cones P and P at both ends of the separator 2 and the ring plates 3 and 3 incorporated in the cups 1 and 1 are the formwork shafts of the formwork 6 and 6. It is derived | led-out from the insertion hole to the outer side of the formwork with the formwork axis | shaft 2a.
Thus, the wire 5 in FIG. 11 is led out from the mold shaft insertion hole of the mold 6 together with the mold shaft 2a at the tip of the separator. Then, the female screw hole of the foam tie 8 is screwed into the male screw portion 2a and tightened. Therefore, the wire 5 is sandwiched between the outer surface of the mold 6 and the tip of the foam tie 8.

When the mold 6 is peeled off and removed from the concrete wall 7 after placing, the foam tie 8 is removed and then the tip of the wire 5 is tied to form an annular shape, and the tip of the bar is inserted into the lever. When the wire 5 is pulled by the action, the inner surface of the mold 6 is pulled outward by the P-cone P or the ring plate 3 in the cup 1, so that it is easily separated from the concrete 7 surface.
JP2003-213930

However, as shown in FIG. 9, in the configuration in which the ring plate 3 is bundled in the diametrical direction by the wire 5 and led out from one place near the center, the ring plate 3 is unstable and easily tilted when pulled, and the ring plate 3 Since the entire surface cannot be uniformly pressed against the inner surface of the mold 6, it is difficult to smoothly peel off the mold. Further, since the pulling force concentrates on the offset part of the ring plate 3, a large pulling force is required and the wire 5 is easily cut.
In addition, when the wire 5 is pulled, the wire 5 is easily pressed against the male screw portion 2a at the tip of the separator, and the wire 5 is damaged and the strength is reduced. As a result, the wire 5 becomes easier to cut.

Further, in the type having the protruding protrusions 9 and 9 as shown in FIG. 10, if the inner diameter of the mold shaft insertion hole 4 of the ring plate 3 is made larger than the outer diameter of the protruding pieces 9 and 9, Since the area is reduced and the contact area with the inner surface of the mold is too small, it is difficult to press contact with a wider surface of the inner surface of the mold 6 and the pressure is locally applied and pulled. This hinders the smooth peeling operation, damages the formwork, and makes it difficult to reuse. The area of the ring plate 3 itself is small, the strength is lowered, and the ring plate 3 is easily deformed by the binding force of the wire 5.
These problems occur similarly in the cup type of FIG. 9 and the P cone type of FIG. 10 as long as the protruding protrusions 9 and 9 are provided.

The technical problem of the present invention pays attention to such problems, and can be shared by separators of various shapes regardless of the presence or absence of bulging protrusions. It is to realize a peeling ring plate capable of peeling off the formwork.

The technical problem of the present invention is solved by the following means. Claim 1 is a peeling ring plate housed in an annular recess between an inner surface of a separator cup or P-cone and a mold shaft 2a as shown in FIGS.
In a state where both ends of the U-shaped U-shaped wire U are connected to the peeling ring plate R, the U-shaped wire is led out from the mold shaft hole of the mold, and is peeled off by the U-shaped wire when the mold is peeled off. The ring plate R is pulled from the outside of the mold and is peeled off.
And in the formwork shaft insertion hole h of the peeling ring plate R, bearing portions 10 and 10 having a predetermined gap between the outer periphery of the formwork shaft are arranged to face each other.
In addition, the concave notched portions 11 and 11 are arranged to face each other so that the two projecting pieces 9 and 9 at a position of 180 ° of the mold shaft can pass therethrough, and the radius thereof is constant, and the circumferential dimensions α, β, A ring plate for peeling a mold, wherein γ is within ± 70 degrees from a position of 180 degrees.

As described above, since the inner diameter of the concave notched portions 11 and 11 at the 180 degree position is constant, a mold having both projecting pieces 9 and 9 at the 180 degree position within the range of ± 70 degrees from the 180 degree position. Since the ring plate R can be rotated relatively freely with respect to the frame axis and the degree of freedom due to play increases, the workability at the time of assembling the mold frame or peeling off the mold frame by the peeling ring plate is improved.
Since the circumferential dimensions α, β, and γ of the concave notched portions 11 and 11 are within ± 70 degrees from the 180 degree position, a sufficient connection area at both ends of the U-shaped wire can be secured, and the peeling ring plate R There is relatively little reduction in strength. If the circumferential dimension of the concave notched portions 11 and 11 exceeds ± 70 degrees from the 180 degree position, the strength of the ring plate R is extremely lowered, and the connecting regions at both ends of the U-shaped wire are too narrow.
In addition, since there is a predetermined gap between the bearing portions 10 and 10 other than the concave notched portions 11 and 11 and the outer periphery of the formwork shaft, the ring plate R is stably held by the formwork shaft while A degree of freedom is also secured.

According to a second aspect of the present invention, the size of the concave notched portions 11 and 11 in the circumferential direction is smaller than the inner diameter of the bearing portions 10 and 10 as shown in FIG. 2, or the two projecting pieces as shown in FIG. It is 0.5-2.5 times the wall thickness of 9.9, It is a ring plate for peeling of Claim 1 characterized by the above-mentioned.
In this way, the circumferential dimension of the concave notched portions 11 and 11 through which the two protruding pieces 9 and 9 at the 180 degree position pass is smaller than the inner diameter of the bearing portions 10 and 10 as shown in W of FIG. 1 or 0.5 to 2.5 times the wall thickness of the projecting pieces 9 and 9 as shown in FIG. 1, and is extremely narrow, so that the pressure contact area between the peeling ring plate R and the inner surface of the formwork The decrease in the resistance is extremely small and sufficient strength can be secured.
As a result, even with the ring plate R applied to the mold shaft having both protrusions 9 and 9 at the position of 180 degrees, the sacrifice of the pressure contact area with the inner surface of the mold can be minimized, and the peeling ring The peeling force by the plate R can be uniformly applied to a wider area.
If the dimensions of the concave notched portions 11 and 11 are smaller than 0.5 times the thickness of the two protruding pieces 9 and 9, the gap between the protruding pieces 9 and 9 is small and the degree of freedom is limited. On the contrary, if it is larger than 2.5 times, the area of the ring plate R becomes narrow and the strength is also lowered.
If the circumferential dimension W of the concave notched portions 11 and 11 is larger than the inner diameter of the bearing portions 10 and 10, the strength of the ring plate R is extremely lowered.

Claim 3 is the same as in claim 1, in the peeling ring plate accommodated in the annular recess between the inner surface of the cup or P cone of the separator and the mold shaft.
In the state where both ends of the U-shaped U-shaped wire rod are connected to the peeling ring plate, the U-shaped wire is led to the outside from the mold shaft insertion hole of the mold, and the peeling ring is removed by the U-shaped wire when the mold is peeled off. It is a structure in which the plate is pulled off from the outside of the mold.
As shown in FIG. 6, the mold shaft insertion hole h of the peeling ring plate R has linear bearing portions 12 and 12 having a predetermined gap between the outer periphery of the mold shaft and the concave arcuate portion 11. The track course consists of '11'. In addition, the concave arcuate portions 11 'and 11' have an inner diameter through which both projecting pieces 9 and 9 at a position of 180 ° of the mold shaft can pass and have a constant radius.
Thus, in the track course shape composed of the linear portions 12 and 12 and the arc-shaped portions 11 ′ and 11 ′ having the same interval d as the inner diameter of the bearing portions 10 and 10, the arc-shaped portions 11 ′ and 11 ′ are Since the inner diameter is the same as that of the concave notched portions 11 and 11 at the 180 degree position, the mold shaft having the two protruding pieces 9 and 9 at the 180 degree position can be freely rotated in this region, and free by looseness. This also increases the workability at the time of assembling the formwork or peeling the formwork with the peeling ring plate.
Further, since the linear portions 12 and 12 are spaced at the same interval d as the inner diameter of the bearing portions 10 and 10, there is no fear that the pressure contact area with the inner surface of the mold of the peeling ring plate R as shown in FIG. There is little decrease in strength. The connection region of the U-shaped wire can be secured sufficiently, and the strength of the ring plate R is hardly reduced.

According to a fourth aspect of the present invention, both ends of the U-shaped wire are inserted into the through-hole opened at a position perpendicular to the 180 ° position where the concave notched portion is provided, and joined to each other on the back surface. The peeling ring plate according to claim 1, claim 2, or claim 3.
In this way, both ends of the U-shaped wire are inserted into the through hole opened at a position perpendicular to the 180 ° position where the concave notched portions 11 and 11 are located, and joined to each other on the back surface. A region having a large area other than the concave notched portions 11 and 11 in the peeling ring plate R can be brought into pressure contact with the inner surface of the mold and can act as a peeling force.
In the case of the bundling structure as shown in FIGS. 9 and 11, the bundling portion 5 a of the wire 5 is locally pressed against the inner surface of the formwork, so that peeling is difficult and the stability of the ring plate 3 is poor. Thus, if both ends of the U-shaped wire are inserted and connected at positions perpendicular to the 180 degree position, the pulling force of the U-shaped wire acts uniformly on the entire surface of the peeling ring plate R.

According to a fifth aspect of the present invention, at a position perpendicular to the 180 degree position where the concave notched portion is present, a notch is disposed opposite to the inner periphery of the mold shaft insertion hole, and both ends of the U-shaped wire are disposed at the notch. The peeling ring plate according to claim 1, wherein L-shaped portions at both ends of the U-shaped wire are joined to each other and inserted into the back surface of the ring plate.
In this way, the notches 13 and 13 are arranged oppositely on the inner periphery of the mold shaft insertion hole h at a position perpendicular to the 180-degree position where the concave notches 11 and 11 are provided.・ Each end of U-shaped wire is inserted into 13 and the L-shaped part is joined to the back of the ring plate, making it easy to align and join both ends of the U-shaped wire and peeling ring plate R, and is suitable for mass production ing.
Moreover, since the L-shaped part is welded to the back surface of the ring plate, there is little risk of coming out even if the welding is poor. Since there is no concave notch 11 and 11 and the welding area is large, the reliability of the joining is high. Since the ring plate is reinforced by the L-shaped portion, deformation of the ring plate R is also suppressed.
Since the base side of the U-shaped wire near the ring plate R also overlaps both side surfaces of the mold shaft 2a, the U-shaped wire U is not deformed and can be reused over and over again.

As in claim 1, within the range of ± 70 degrees from the 180 degree position, the ring plate R can rotate relatively freely with respect to the mold shaft having the two protruding pieces 9 and 9 at the 180 degree position. As the degree of freedom increases, the assembling of the mold and the peeling work of the mold using the peeling ring plate are facilitated.
Further, since the concave notched portions 11 and 11 are within ± 70 degrees, both ends of the U-shaped wire can be connected to other regions, and the strength reduction of the peeling ring plate R is relatively small. In addition, since there is a predetermined gap between the bearing portions 10 and 10 other than the concave notched portions 11 and 11 and the outer periphery of the formwork shaft, the ring plate R is stably held by the formwork shaft while A degree of freedom is also secured.

As in claim 2, the circumferential dimension of the concave notched portions 11 and 11 through which the projecting pieces 9 and 9 at the 180 degree position pass is the same as that of the bearing portions 10 and 10 as indicated by W in FIG. Since it is smaller than the inner diameter, or 0.5 to 2.5 times the wall thickness of the protruding pieces 9 and 9 as shown in FIG. The pressure contact area is hardly reduced, and sufficient strength can be secured.
As a result, even with the ring plate R applied to the mold shaft having both protrusions 9 and 9 at the position of 180 degrees, the sacrifice of the pressure contact area with the inner surface of the mold can be minimized, and the peeling ring The peeling force by the plate R can be uniformly applied to a wider area.

As in claim 3, the mold shaft insertion hole h of the peeling ring plate R is formed from the straight portions 12 and 12 and the arcuate portions 11 ′ and 11 ′ having the same distance d as the inner diameter of the bearing portions 10 and 10. Since the arc-shaped portions 11 'and 11' have the same inner diameter as the concave notched portions 11 and 11 at the 180 degree position, both projecting pieces 9 and Since the formwork shaft having 9 can freely rotate and the degree of freedom due to backlash increases, the workability at the time of assembling the formwork or peeling off the formwork by the peeling ring plate is greatly improved.
Further, since the linear portions 12 and 12 are spaced at the same interval d as the inner diameter of the bearing portions 10 and 10, there is no fear that the pressure contact area with the inner surface of the mold of the peeling ring plate R as shown in FIG. There is little decrease in strength. The connection region of the U-shaped wire can be secured sufficiently, and the strength of the ring plate R is hardly reduced.

As in claim 4, both ends of the U-shaped wire are inserted into the through-hole opened at a position perpendicular to the 180 ° position where the concave notched portions 11 and 11 are located, and joined to each other on the back surface. Therefore, the entire surface of the peeling ring plate R other than the concave notched portions 11 and 11 in the peeling ring plate R can be pressed against the inner surface of the mold and can act as a peeling force.

As in claim 5, notches 13 and 13 are arranged oppositely on the inner periphery of the mold shaft insertion hole h at a position perpendicular to the 180-degree position where the concave notches 11 and 11 are provided. Since both ends of the U-shaped wire U are inserted into the notches 13 and 13 and the L-shaped bent part is welded on the back surface of the ring plate, it is easy to align and join both ends of the U-shaped wire to the peeling ring plate R It is suitable for mass production.
Moreover, since the L-shaped part is welded to the back surface of the ring plate, there is little risk of coming out even if the welding is poor. Since there is no concave notch 11 and 11 and the welding area is large, the reliability of the joining is high. Since the ring plate is reinforced by the L-shaped portion, deformation of the ring plate R is also suppressed.
Since the cutouts 13 and 13 are arranged facing each other on the inner periphery of the mold shaft hole h and both ends of the U-shaped wire are inserted, the base side of the U-shaped wire near the ring plate R is also used as the mold when used. It overlaps with both side surfaces of the shaft 2a, and the U-shaped wire U is not deformed and can be reused over and over again.

Next, an embodiment will be described in which a ring plate for peeling a form according to the present invention is actually embodied. According to the present invention, the conventional peeling ring plate 3 shown in FIGS. 9 and 11 is improved as shown in FIGS. 1 to 6 are plan views showing the shape of the peeling ring plate R, and FIG. 7 is a perspective view of the peeling ring plate with a U-shaped tensile wire.

The ring plate R shown in FIGS. 1 to 6 has a different shape of each mold shaft insertion hole h. The mold frame shaft insertion hole h has concave arc-shaped bearing portions 10 and 10 having a gap of, for example, about 0.5 to 2.0 mm between the mold frame shaft outer periphery. In the case of FIG. 1, the concave notched portions 11 and 11 for passing through both the protruding pieces 9 and 9 at the 180 ° position are provided at the 180 ° position. However, the dimension in the width direction of the concave notched portions 11 and 11 is 0.5 to 2.5 times the thickness of the both projecting pieces 9 and 9, and in each embodiment of the present invention, The narrowest.

In the case of FIG. 2, the dimension W in the perpendicular direction of the concave notched portions 11, 11 is smaller than the inner diameter of the concave arc-shaped portions 10, 10. In the case of FIGS. 3 to 5, the circumferential dimension of the concave notches 11 and 11 is within ± 70 degrees from the 180 degree position. Even within this range, there are roughly three types. For example, in FIG. 3, the angle in the circumferential direction is about 60 degrees as α, and in FIG. 4, the angle in the circumferential direction is about 80 degrees as β. In FIG. 5, since the angle in the circumferential direction is about 120 degrees as γ and the concave notched portions 11 and 11 are the maximum, the bearing portions 10 and 10 are the minimum. As a result, there is no room for the bearings 10 and 10 to have a concave arc shape. Of course, you may form in a concave circular arc shape.

In the case of FIG. 6, the shape of the mold shaft insertion hole h is a track course shape composed of straight portions 12 and 12 and arc-shaped portions 11 ′ and 11 ′.
In each of the above-described embodiments, the holes H and H opened at a position perpendicular to the 180 ° position where the concave notched portions 11 and 11 and the arc-shaped portions 11 ′ and 11 ′ are provided are formed on the U-shaped wire U. For connecting both ends.

The ring plate R shown in FIGS. 1 to 6 is used by attaching and connecting a U-turn-shaped tensile wire U as shown in FIG. That is, the both ends of the U-shaped wire U and the back surface of the ring plate R are bonded by welding on the back side with both ends of the U-shaped wire U inserted in the holes H, H opened in each ring plate R. Joined and connected.
In addition, each ring board R and U-shaped wire U are suitably made of stainless steel so that rust does not easily occur. The thickness of the U-shaped wire U is not particularly limited. For example, an outer diameter of about 0.3 to 2.5 mm is suitable.

When the formwork shaft 2a with both projecting pieces 9 and 9 of FIG. 10 is inserted into the formwork holes of the formwork 6 and 6 as shown in FIG. 11, the concave notch 11 of the peeling ring plate R of the present invention, Both projecting pieces 9 and 9 pass through 11.
Therefore, in a state where the separator 2 is mounted on the mold, it passes through the projecting pieces 9 and 9 at the base of the mold shaft 2a of the separator 2, and the annular concave chamber inside the cup 3 or the P cone P at the back thereof. A peeling ring plate R is built in (a perfect circular concave space formed between the inner surface of the cup 3 or the P cone P and the base of the mold shaft 2a).
When the peeling ring plate R is rotated with respect to the mold shaft 2a due to vibration or inadvertent external force with the peeling ring plate R mounted in this manner, the peeling ring plate R is moved to the two protruding pieces 9, 9. It becomes impossible to remove the mold 6 from the mold shaft 2a, and the mold 6 cannot be peeled off.

However, as shown in FIG. 5, when the circumferential dimension γ of the concave notched portions 11 and 11 is as large as ± 60 degrees or less from the 180 degree position, both the ring plates for peeling R are slightly rotated. Without being caught by the projecting pieces 9, 9, the mold 6 can be pulled out from the concrete surface by pulling out smoothly and pulling the back surface of the mold over the entire surface of the ring plate R.
On the other hand, in the case of FIG. 1, the width of the concave notched portions 11 and 11 through which the two protruding pieces 9 and 9 pass is within twice the thickness of the protruding pieces 9 and 9, It is narrow. As a result, when the peeling ring plate R is rotated a little, it is caught in the back of the both projecting pieces 9 and 9 and cannot be pulled out. Therefore, the mold 6 cannot be peeled off.

Therefore, the circumferential dimensions of the concave notched portions 11 and 11 and 11 'and 11' in FIGS. 2, 3, 4, and 6 are the same as the concave notched portions 11 and 11 in FIG. Since the circumferential dimension is intermediate between the cutout portions 11 and 11, the problem of catching on both the projecting pieces 9 and 9, the degree of freedom of extraction, and workability become intermediate.
In addition, the larger the circumferential dimension of the concave notched portions 11 and 11, the less the possibility of catching and the easier it is to pull out, but the area of the peeling ring plate R itself is reduced, so the strength is reduced accordingly. The problem that the pressure contact area with the rear surface of the formwork is also reduced is increased.

The peeling ring plate R shown in FIGS. 1 to 7 has both ends of a U-turn wire rod U inserted therein and welded on the back surface. The operation of inserting both ends of the U-shaped wire U is troublesome.
On the other hand, as shown in FIG. 8 (2), the notches 13 and 13 are arranged opposite to the inner periphery of the mold shaft insertion hole h, and both ends of the U-shaped wire U are inserted into the mold shaft insertion hole h. Next, when both ends of the U-shaped wire U are inserted into the notches 13 and 13, the L-shaped bent portions L and L at both ends of the U-shaped wire U are peeled off as shown in FIGS. 8 (3) and 8 (5). Overlaps the back of R.
In this state, when the L-shaped bent portions L and L are welded and joined to the back surface of the peeling ring plate R, the peeling ring plate with a U-shaped tensile wire is completed.

Thus, when both ends of the U-turn-shaped tensile wire U in FIG. 8 (1) are narrowed and inserted into the mold shaft insertion hole h of the peeling ring plate R, both ends are returned to the original position. Since it fits into the notches 13 and 13 and is hooked, the workability is improved compared to the work of aligning and inserting both ends of the wire into the holes H and H.
In addition, since the L-shaped bent portions L and L at both ends are welded to the back surface of the peeling ring plate R, even if there is a welding failure, the formwork is peeled off unlike the hole insertion type in FIG. There is no risk that the pulling wire U will come off from the peeling ring plate R during the operation, and it is safe.

When the L-shaped bent portions L and L overlap and are welded to the back surface of the peeling ring plate R, the peeling ring plate R itself can be reinforced, and when the U-shaped wire is pulled with a bar or the like, the peeling ring plate R can be prevented from being deformed, and the peeling ring plate R can be used repeatedly.
Also, in the structure in which both ends of the U-shaped wire are inserted into the holes H and H of the peeling ring plate R and welded on the back surface as shown in FIGS. 1 to 7, the connecting portion of the U-shaped wire to the peeling ring plate R is In order for the entire surface of the peeling ring plate R to overlap the rear surface of the mold frame without overlapping the mold frame shaft 2a, the base of the U-shaped wire U is on the inner surface of the mold frame shaft hole 6h (see FIG. 12) of the mold frame 6. It becomes the appearance to dig deeply. Alternatively, the base of the U-shaped wire U is bent at a right angle.

On the other hand, as shown in FIG. 8, when the notches 13 and 13 are formed in the inner periphery of the mold shaft hole h of the peeling ring plate R and the U-shaped wire is inserted therein, the U-shaped wire Since the base side of the sheet overlaps with the mold shaft 2a, excessive deformation of the U-shaped wire does not occur when mounting or peeling the mold. Therefore, the peeling ring plate R with the U-shaped wire after use can be reused many times.
When the mold shaft insertion hole h is formed by laser cutting, the notches 13 and 13 can be formed continuously, so that the work process can be shortened.
In the hole insertion type shown in FIG. 7, after both ends of the U-shaped wire have passed through the holes H and H, it is also possible to weld the tip after bending the tip into an L shape on the back surface of the ring plate.

FIG. 12 is a longitudinal sectional view showing a state in which the peeling ring plate R with the U-shaped wire U in FIG. 8 is attached to the mold, and the positions of both projecting pieces 9, 9, that is, the state in the mold 6. .
In this way, when the separator 2 is mounted so that the projecting pieces 9 and 9 of the formwork shaft 2a face in the vertical direction, the U-shaped wire U connected to the peeling ring plate R is on both the left and right sides of the formwork shaft 2a. Are put together so as to sandwich them, and together with the mold shaft 2a, it is pulled out from the mold hole 6h. Therefore, the U-shaped wire U is not deformed.
When disassembling the mold, if a bar or the like is inserted into the U-shaped folded portion of the U-shaped wire rod U and pulled outside, the mold 6 will be outside by the peeling ring plate R overlapping the inner surface of the mold Is pulled away from the concrete surface.

As described above, the peeling ring plate of the present invention has the concave notched portions 11 and 11 for passing the projecting pieces 9 and 9 at the position in the direction of 180 degrees as with the projecting pieces 9 and 9 of the mold shaft. Therefore, the present invention can be applied regardless of the presence or absence of both projecting pieces 9 and 9 of the separator mold shaft. Moreover, since the shape other than the concave notched portions 11 and 11 is left and the both ends of the U-shaped wire are joined, the pressure contact area with the mold back surface of the peeling ring plate is expanded, The wide surface can be effectively pulled by the peeling ring plate and peeled off, and the strength reduction of the peeling ring plate itself can be suppressed.

1 to 6 are various shapes of the mold shaft insertion hole of the peeling ring plate, and FIG. 1 is a plan view showing the first embodiment. It is a top view of 2nd Embodiment of the formwork axis insertion hole of the ring plate for peeling. It is a top view of 3rd Embodiment of the formwork axis insertion hole of the ring plate for peeling. It is a top view of 4th Embodiment of the formwork axis insertion hole of the ring plate for peeling. It is a top view of 5th Embodiment of the formwork axis insertion hole of the ring plate for peeling. It is a top view of 6th Embodiment of the formwork insertion axial hole of the ring plate for peeling. It is a perspective view of the state which connected the both ends of the U-shaped wire to the ring plate for peeling. It is a figure which shows the hook structure of the both ends of a U-shaped wire. It is a perspective view which shows the structure of the conventional ring plate for peeling. It is a perspective view of a normal P cone. It is a longitudinal cross-sectional view of a state in which concrete is placed between molds on which a conventional peeling ring plate is mounted. It is a longitudinal cross-sectional view in the position of the both projecting pieces of a formwork axis | shaft in the state which led out the U-shaped wire from the formwork hole.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cup 2 Separator 2a Formwork axis | shaft 3 inserted and supported by formwork hole 3 Conventional peeling ring board 4h Formwork shaft insertion hole 5 Binding wire for tension 6 Formwork 6h Formwork shaft insertion hole U of formwork Tensile wire (U-shaped wire)
R Peeling ring plate P of the present invention Plastic cone 9. 9 Swelling protrusion
10 ・ 10 Bearing
11.11 Concave notched part
11 '・ 11' concave arcuate part
12.12 Linear part for bearing
13 ・ 13 Notch L L-shaped bent part at both ends of U-shaped wire

Claims (5)

In the ring plate for peeling stored in the annular recess between the inner surface of the separator cup or P cone and the mold shaft,
In the state where both ends of the U-shaped U-shaped wire rod are connected to the peeling ring plate, the U-shaped wire is led to the outside from the mold shaft insertion hole of the mold, and the peeling ring is removed by the U-shaped wire when the mold is peeled off. Pull the board from the outside of the formwork and peel it off,
In the mold shaft insertion hole of the peeling ring plate, a bearing portion having a predetermined gap is disposed opposite to the outer periphery of the mold shaft.
Moreover, the concave notches are arranged opposite each other so that both protrusions at the 180 degree position of the mold shaft can pass through, and the radius is constant, and the circumferential dimension is within ± 70 degrees from the 180 degree position. A ring plate for peeling a formwork, characterized in that there is. The circumferential dimension of the concave notched portion is smaller than the inner diameter of the bearing portion or 0.5 to 2.5 times the wall thickness of both projecting pieces. 2. The peeling ring plate according to 1. In the ring plate for peeling stored in the annular recess between the inner surface of the separator cup or P cone and the mold shaft,
In the state where both ends of the U-shaped U-shaped wire rod are connected to the peeling ring plate, the U-shaped wire is led to the outside from the mold shaft insertion hole of the mold, and the peeling ring is removed by the U-shaped wire when the mold is peeled off. Pull the board from the outside of the formwork and peel it off,
The mold shaft insertion hole of the peeling ring plate has a track course shape composed of a linear portion for bearing having a predetermined gap between the outer periphery of the mold shaft and a concave arcuate portion,
2. The peeling ring plate according to claim 1, wherein the concave arc-shaped portion has an inner diameter through which both projecting pieces at a position of 180 ° of the mold shaft can pass and a constant radius. The both ends of the U-shaped wire are inserted into through-holes opened at a position perpendicular to the 180 ° position where the concave notched portion is located, and are joined to each other on the back surface. The peeling ring board of Claim 2 or Claim 3. At a position perpendicular to the 180 ° position where the concave notch is located, a notch is arranged opposite to the inner periphery of the mold shaft insertion hole, and both ends of the U-shaped wire are fitted into the notch, and the ring plate The peeling ring plate according to claim 1, wherein L-shaped portions at both ends of the U-shaped wire are joined to the back surface.

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