JP2000084913A - Form for segment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a form for a segment, on the inner peripheral surface of which an insert fitting is provided by an easy work at a low cost. SOLUTION: To an end plate 12, which forms the inner peripheral surface of a segment, an insert mounting fitting 32 for holding an insert fitting 2 is provided. The insert mounting fitting 32 consists of a holding fitting 33 provided on the bottom plate 12 and a resin mounting member 34. A screw part 35 is formed at one end side of the mounting member 34, at the other end side of which a holding part 36 is formed. A flange part 38 is formed between the screw part 35 and the holding part 36. A cut-in part 39 is formed on the holding part 36 near the flange part 38. At the center of the mounting member 34, a tool hole 37 having a hexagonal section is formed. At the tip part of the holding part 36, outward projecting engaging parts 40 are formed. By pivoting the mounting member 34 under the condition that the holding part 31 of the mounting member, into the screw part 35 of which the insert fitting 2 is screwed, is inserted in the inserting hole 41 of the holding fitting 33, the engaging parts 40 are engaged to the under surface side of the holding fitting 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a segment mold for manufacturing segments formed in an arc plate shape for constructing a tunnel wall or the like by being joined to each other.

[0002]

2. Description of the Related Art As a method for constructing a tunnel, a so-called shield method is generally used, in which a segment (mainly made of concrete or steel) is assembled on the inner surface side of an excavation hole to construct a cylindrical wall. The mainstream segment used in this shield method is a rectangular plate-shaped arcuate plate. As shown in FIG. 11, this type of segment 1 has an inner peripheral surface 1a for attaching, for example, a lining for secondary lining to the inner peripheral surface 1a.
There is one in which an insert fitting 2 having a female screw on the side is embedded.

A conventional example of a mold for manufacturing the segment 1 in which the insert fitting 2 is embedded will be described with reference to the drawings.
In FIG. 12, reference numeral 11 denotes a segment formwork. The form 11 has a bottom plate 12 that forms the inner peripheral surface 1a of the segment 1, and side plates 13 and end plates 14 provided around the bottom plate 12.
The portion surrounded by the side plate 13 and the end plate 14 is a concrete placing space S in which concrete is placed. Then, concrete is poured into the concrete placing space S, and after the concrete is hardened, the side plate 13 and the end plate 14 are separated from the segment 1 made of the hardened concrete, and the segment 1 is pulled up above the formwork 11. The segment 1 is released from the mold 11.

[0004] An insert holding portion 21 is provided on a bottom plate 12 of the mold 11. These insert holders 21 have insert holders 23 held in holes 22 formed in the bottom plate 12 in a vertical direction. The tip side of the insert holder 23 is a screw portion 24,
The rear end side is a holding section 25, and the insert fitting 2 is screwed into the screw section 24 on the front end side. As shown in FIG. 13, the hole 22 is provided with a locking member 27 protruding by a spring 26 in a direction intersecting the axis of the hole 22. When the part 25 is inserted, the locking member 27 enters into the groove 28 formed on the peripheral surface of the holding part 25 by the urging force of the spring 26, whereby the insert holder 23 is
2.

[0005] When the segment 1 is lifted upward and removed from the mold, the insert holder 23 of the insert holder 21 is also vertically pulled up together with the segment 1 and is locked in the hole 22 by the locking member 27. The holding portion 25 is pulled out from the hole 22 of the bottom plate 12 of the mold 11. After that, the insert holder 2 and the insert holder 23 of the segment 1 removed from the mold 11 are removed.
Is removed, and these segments 1 are installed to construct a cylindrical wall.

[0006]

By the way, in the mold having the above structure, the hole 22 of the insert holding portion 21 must be formed vertically in order to raise the segment 1 in the vertical direction at the time of removing the mold. Therefore, at a position deviated from the center position of the mold 11, the insert holder 23 in which the screw portion 24 and the holding portion 25 are bent must be used.
In addition, since the bending angle varies depending on the distance from the center position of the mold 11, a plurality of types of insert holders 23 having different bending angles must be prepared, which causes a problem that equipment cost increases. Was. In addition, the insert holders 23 having a plurality of different shapes must be surely attached to the predetermined holes 22 of the bottom plate 12 of the mold 11, and the operation is extremely complicated. After the segment 1 is removed from the mold 11, the insert holder 23 is removed from the insert fitting 2.
During transportation or installation of the segment 1, the insert fitting 2 may interfere with other members, or foreign matter may enter the female screw.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and makes it possible to easily manufacture a segment in which an insert fitting is embedded at a low cost and to protect the embedded insert fitting. The purpose is to provide formwork.

[0008]

According to a first aspect of the present invention, there is provided a segment mold for manufacturing an arc plate-shaped segment provided with an insert fitting on an inner peripheral surface. It has a bottom plate forming the inner peripheral surface of the segment, side plates provided on both sides of the bottom plate, and end plates provided at both ends of the bottom plate, these bottom plate, side plate and end The space surrounded by the plate is a concrete casting space, the bottom plate is provided with an insert fitting for holding the insert fitting, and the insert fitting is a holding fitting having an insertion hole formed at the center, An attachment member having one end side serving as a screw part to which the insert fitting is screwed and attached, and the other end side serving as a holding part engaged and held by being inserted into an insertion hole of the holding fitting; A, the mounting member, upon demolding from between the concrete 設空, is characterized by being separated into said threaded portion and the holding portion.

As described above, the mounting member of the insert mounting tool for holding the insert fitting on the bottom plate is engaged with the screw portion screwed into the insert fitting through the insertion hole of the holding fitting provided on the bottom plate. The screw portion and the holding portion are separated from each other when the segment is released from the mold. Therefore, the arc plate-shaped segment provided with the insert fitting on the inner peripheral surface is removed from the formwork. The mold is simplified, and the insert fitting can be held on the bottom plate irrespective of the angle at which the segment is removed. Then, after separation, the screw portion left on the insert fitting becomes a lid of the insert fitting, and the insert fitting is protected during transportation, installation, and the like of the segment.

According to a second aspect of the present invention, there is provided the segment formwork according to the first aspect, wherein the attaching member has a locking portion projecting outward in a radial direction at a distal end portion of the holding portion. The holding fitting is formed with a groove through which the locking portion can pass when the holding portion is inserted into the insertion hole, and the holding portion is inserted into the insertion hole and rotated. Thus, the holding portion is held by the holding metal by the locking portion locking the lower surface side of the holding metal. Then, by inserting the holding portion of the attachment member into the insertion hole of the holding metal and rotating the holding member, the locking portion formed at the tip of the holding portion is locked to the lower surface side of the holding metal, and the locking is performed. By the force, the attachment member in which the insert fitting is attached to the screw portion is attached to the bottom plate.

According to a third aspect of the present invention, there is provided the segment mold according to the first or second aspect.
A flange portion is formed at a boundary between the screw portion and the holding portion so as to extend in a circumferential direction. Thereby, the screwing amount of the screw portion of the mounting member into the insert fitting and the insertion amount of the holding portion through the holding fitting are each limited by the flange portion.

According to a fourth aspect of the present invention, in the segment mold of the third aspect, a horizontal surface is formed on a lower surface of the holding bracket at a position deviated from a position where the groove is formed. The thickness of the holding fitting at the formation position is smaller than the distance between the flange of the mounting member and the locking part, and the thickness of the holding fitting on the horizontal plane is the thickness of the holding part and the locking part. When the holding portion is rotated in a state where the holding portion is inserted through the insertion hole of the holding metal fitting, the locking is performed between the formation position of the groove portion and the horizontal plane. The part is an inclined surface for guiding the part to the horizontal plane. Thereby, by inserting the holding portion of the mounting member into the insertion hole of the holding bracket and rotating the mounting member, the locking portion of the holding portion is guided and arranged on the horizontal surface by the inclined surface, and the holding portion is moved to the holding bracket. It is securely held.

According to a fifth aspect of the present invention, there is provided the segment formwork according to the third or fourth aspect,
A cut portion is formed in the vicinity of the flange portion of the mounting member on the holding portion side so as to extend in a circumferential direction, and at the time of removing the segment, the mounting member is connected to the screw portion by the cut portion. It is characterized by being separated into parts. Thus, the mounting member is separated into the screw portion and the holding portion at the cut portion formed closer to the holding portion than the flange portion, so that the holding portion easily falls off from the holding metal fitting. That is, there is no need to remove the holding portion from the holding fitting.

According to a sixth aspect of the present invention, in the segment formwork according to any one of the first to fifth aspects, a tool hole having a rectangular cross section is formed at the center of the mounting member. It is characterized in that a tool having a rectangular cross section can be fitted into the hole. Then, after installing the segment, when screwing a screw or the like into the insert metal fitting, insert a tool such as a wrench having a rectangular cross section into a tool hole formed in the screw part of the mounting member, and turn the screw part. Are easily removed from the insert fitting.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a segment mold according to an embodiment of the present invention. Note that the same reference numerals are given to the same structural parts as those of the above-described conventional technology, and description thereof will be omitted. In FIG. 1, reference numeral 31 denotes a segment formwork. The segment form 31 has the bottom plate 12
, A plurality of insert fittings 32 are provided. As shown in FIGS. 2 and 3, these insert fittings 32 include a holding bracket 33 provided on the bottom plate 12,
A mounting member 34 held by the holding metal member 33 is provided, and the insert metal member 2 is screwed into the mounting member 34 for mounting.

The holding bracket 33 is formed in a cylindrical shape, is fitted in a hole 12a formed in the bottom plate 12, and is fixed by welding or the like. As shown in FIGS. 4 and 5, the mounting member 34 is a cylindrical member formed of resin, and has a screw portion 35 having a male screw that is screwed into a screw hole of the insert fitting 2 on one end side. ing.
The other end of the mounting member 34 is a holding portion 36 held by the holding bracket 33. The hole formed in the mounting member 34 is a tool hole 37 having a hexagonal cross section. In addition,
The cross-sectional shape of the tool hole 37 is not limited to a hexagon but may be a quadrangle as long as the shape allows a tool to be fitted and the mounting member 34 can be rotated.

The mounting member 34 has a flange 38 at an intermediate portion thereof. One end of the mounting member 34 is a screw portion 35 and the other end is a holding portion 36 with the flange 38 as a boundary. . In the vicinity of the flange portion 38, a cut portion 39 is formed so as to extend in the circumferential direction on the holding portion 36 side. A pair of locking portions 40 projecting outward in the radial direction are formed at the front end of the holding portion 36 of the attachment member 34 at opposing positions.

As shown in FIG. 5 and FIG.
Is formed with an insertion hole 41 at the center thereof, and a groove 42 is formed in the insertion hole 41 at an opposing position so as to extend in the axial direction. That is, the insertion hole 4 of the holding bracket 33 is
1, the holding portion 36 of the attachment member 34 is
Can be inserted in a state in which it is aligned with the groove portion 42. The insertion hole 41 of the holding bracket 33
When the holding portion 36 of the attachment member 34 is inserted from above, the flange portion 38 of the attachment member 34
Abuts on the upper end of the cover, and further insertion is prohibited. At this time, the locking portion 40 at the tip of the holding portion 36 of the mounting member 34 projects from the lower end of the holding bracket 33.

Further, the holding bracket 33 has a lower end,
A pair of protrusions 43 are formed at opposing positions, and these protrusions 43 are provided on one side of the groove 42, respectively. The lower surface of the holding bracket 33 is
The opposite side is a horizontal plane 44, and the area from this horizontal plane 44 to the groove 42 is an inclined surface 45. Then, a dimension L between the flange portion 38 of the mounting member 34 and the locking portion 40 is set.
With respect to the thickness L of the holding member 33 in the groove 42.
1 is slightly reduced and the holding fitting 3 in the horizontal plane 44
3 have substantially the same thickness L2.

As a result, as shown in FIG. 8, when the holding portion 36 of the mounting member 34 is inserted into the insertion hole 41 of the holding bracket 33, the mounting member 34 is tilted clockwise, that is, the locking portion 40 is inclined. When rotated in the direction of movement to the surface 45 side, as shown in FIG. 9, the locking portion 40 of the mounting member 34 is guided by the inclined surface 45 to the horizontal surface 44 and arranged. As a result, the holding member 33 is inserted between the flange portion 38 and the locking portion 40 of the mounting member 34, and the mounting member 34 is
To be held. At this point,
The locking portion 40 comes into contact with the projection 43 so that the rotation of the mounting member 34 with respect to the holding bracket 33 is restricted.

Next, a description will be given of a case where the segment 1 having the plurality of insert fittings 2 provided on the inner peripheral surface 1a by the segment mold 31 having the insert fittings 32 is described. (1) Setting of the insert fitting 2 First, the screw portion 35 of the mounting member 34 constituting the insert fitting 32 is screwed into the insert fitting 2, and the insert fitting 2 is attached to the mounting member 34.

(2) Attachment of attachment member 34 to formwork 31 Next, the holding portion 36 of the attachment member 34 to which the insert fitting 2 is attached is inserted into the insertion hole 41 of the holding fixture 33.
The locking portion 40 is inserted in a state where it is aligned with the position of the groove portion 42. By doing so, the holding portion 36 of the mounting member 34 is inserted until the flange portion 38 contacts the upper surface of the holding bracket 33.

(3) Holding of the attachment member 34 In this state, the insert fitting 2 attached to the attachment member 34 is gripped, and the insert fitting 2 is rotated clockwise, that is, the locking portion 40 of the attachment member 34 is moved. It is rotated in the direction to move to the inclined surface 45 side. In this case, the locking portion 40 of the mounting member 34 is guided and arranged on the horizontal surface 44 by the inclined surface 45, and the mounting member 3
4, between the flange portion 38 and the locking portion 40,
3, and the mounting member 34 is held by the holding bracket 33.

(4) Casting of concrete In this manner, the insert fitting 32 of the bottom plate 12
After the insert fitting 2 is attached to each
Reinforcement and the like are arranged in the concrete placing space S and concrete is placed.

(5) Demolding of the segment 1 When the cast concrete is cured and the segment 1 is formed by this concrete, the side plate 1 of the formwork 31 is formed.
3. The end plate 14 is moved in the direction away from the segment 1, and the segment 1 is lifted vertically upward and removed from the mold 31. In this manner, in each insert fitting 32, each mounting member 34
However, as shown in FIG. 10, it is cut at a cut portion 39 below the flange portion 38.

Then, the cut mounting member 34
Is left in the insert fitting 2 and the holding part 3
The side 6 falls out of the insertion hole 41 of the holding bracket 33. In this manner, the screw part 35 of the mounting member 34 is left in the insert 2 of the segment 1 that has been removed, and the screw 35 serves as a lid of the insert 2 so that the insert 1 can be used for transportation and installation of the segment 1. 2 is protected.

(6) Removal of the screw portion 35 After the segment 1 is installed, when attaching a lining or the like to the insert fitting 2 provided on the inner peripheral surface 1a side of the segment 1, when inserting the screw, the insert The screw portion 35 left on the metal fitting 2 is removed. That is, a tool such as a hexagon wrench is inserted into the tool hole 37 formed in the screw portion 35, the screw portion 35 is turned, and the screw portion 35 is removed from the insert fitting 2.

As described above, according to the segment mold 31, the insert fitting 32 for holding the insert 2 on the bottom plate 12 is provided with the screw portion 35 screwed into the insert 2 and the holding portion provided on the bottom plate 12. The screw portion 35 and the holding portion 36 are made of a resin that is constituted by a holding portion 36 that is inserted into and engaged with the insertion hole 41 of the metal fitting 33.
Are separated when the segment 1 is released from the mold 1. Therefore, the arc plate-shaped segment 1 provided with the insert fitting 2 on the inner peripheral surface 1a can be easily removed from the mold frame 31.

That is, the insert fitting 2 can be held on the bottom plate 12 irrespective of the removal angle of the segment 1, and a plurality of types of insert holders are prepared according to the difference in the removal angle as in the related art. Does not need to be mounted at a predetermined position, thereby reducing equipment costs and simplifying the mounting operation. Then, after separation, the screw portion 35 left on the insert fitting 2 serves as a lid of the insert fitting 2, and is used when the segment 1 is transported or installed.
Can be protected.

Further, by inserting the holding portion 36 of the mounting member 34 into the insertion hole 41 of the holding metal member 33 and rotating the holding member 36, the locking portion 40 formed at the distal end of the holding member 36 can be extremely easily fixed. The insert member 2 can be attached to the bottom plate 12 with the insert metal fitting 2 attached to the screw portion 35 by the engagement with the lower surface side of the bottom surface 33. Further, the screwing amount of the screw portion 35 of the mounting member 34 into the insert fitting 2 and the holding fitting 3 of the holding portion 36
3 can be limited by the flange portion 38, respectively.

Further, the holding portion 36 of the mounting member 34 is inserted through the insertion hole 41 of the holding bracket 33 so that the mounting member 34
Is rotated, the locking portion 40 of the holding portion 36 is guided to the horizontal surface 44 by the inclined surface 45, and the horizontal surface 4
4 and the holding portion 36 is securely held by the holding bracket 33. Moreover, the mounting member 34 is separated into the screw portion 35 and the holding portion 36 at the cut portion 39 formed on the holding portion 36 side of the flange portion 38, so that the holding portion 36
Can be easily dropped from the holding bracket 33. That is, it is not necessary to remove the holding portion 36 from the holding bracket 33.

Furthermore, after the segment 1 is installed, when a screw or the like is screwed into the insert fitting 2, a tool such as a wrench having a rectangular cross section is inserted into a tool hole 37 formed in the screw portion 35, and the screw portion 35 is turned. Thereby, the screw portion 35 can be easily removed from the insert fitting 2.

[0033]

As described above, according to the segment formwork of the present invention, the following effects can be obtained.
According to the segment formwork of the first aspect, the insert fitting for holding the insert fitting on the bottom plate is engaged with the screw portion screwed into the insert fitting through the insertion hole of the holding fitting provided on the bottom plate. Since the screw portion and the holding portion are configured to be separated when the segment is released from the mold, an arc plate-shaped segment provided with an insert fitting on the inner peripheral surface can be easily formed. It can be removed from the mold. In other words, the insert bracket can be held on the bottom plate irrespective of the angle at which the segment is removed, and as in the conventional case, a plurality of types of insert holders are prepared according to the difference in the removal angle, and these are attached to predetermined positions This eliminates the necessity, so that the equipment cost can be reduced and the mounting operation can be simplified. Then, after the separation, the screw portion left on the insert fitting serves as a lid of the insert fitting, so that the insert fitting can be protected during transportation or installation of the segment.

According to the second aspect of the present invention, by inserting the holding portion of the mounting member into the insertion hole of the holding metal and rotating the holding member, the engaging portion formed at the distal end of the holding portion can be extremely easily formed. The stop portion is locked to the lower surface side of the holding fitting, and the locking member allows the mounting member in which the insert fitting is attached to the screw portion to be attached to the bottom plate.

According to the third aspect of the present invention, the amount of screwing of the screw portion of the mounting member into the insert fitting and the amount of insertion of the holding portion into the holding fitting can be limited by the flange.

According to the fourth aspect of the present invention, the holding portion of the holding member is inserted into the insertion hole of the holding fitting and the mounting member is rotated, so that the locking portion of the holding portion is formed by the inclined surface. The holding portion is guided by the horizontal surface and arranged on the horizontal surface, so that the holding portion is securely held by the holding fitting.

According to the fifth aspect of the present invention, the mounting member is separated into the screw portion and the holding portion at the notch formed on the holding portion side with respect to the flange portion. It can be easily dropped from the holding fitting. That is, it is not necessary to remove the holding portion from the holding fitting.

According to the sixth aspect of the present invention, when a screw or the like is screwed into the insert after the segment is set, a tool such as a wrench having a square cross section is inserted into a tool hole formed in the screw portion. By turning the screw,
This screw portion can be easily removed from the insert fitting.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a segment for explaining the configuration and structure of a segment formwork according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the insert fixture for explaining the configuration and structure of the insert fixture provided on the bottom plate of the segment formwork according to the embodiment of the present invention.

FIG. 3 is an exploded perspective view of the insert fixture for explaining the configuration and structure of the insert fixture provided on the bottom plate of the segment formwork according to the embodiment of the present invention.

FIG. 4 is a side view of a mounting member for explaining a mounting member constituting an insert mounting tool provided on a bottom plate of the segment formwork according to the embodiment of the present invention.

FIG. 5 is a front view of a mounting member for explaining a mounting member constituting an insert mounting tool provided on a bottom plate of the segment formwork according to the embodiment of the present invention.

FIG. 6 is a side view of the holding fitting for explaining the holding fitting constituting the insert fitting provided on the bottom plate of the segment formwork according to the embodiment of the present invention.

FIG. 7 is a front view of the holding fitting for explaining the holding fitting constituting the insert fitting provided on the bottom plate of the segment formwork according to the embodiment of the present invention.

FIG. 8 is a front view of the insert mounting tool viewed from the back side of the bottom plate for explaining how to hold the mounting member to the holding metal fitting in the insert mounting tool provided on the bottom plate of the segment formwork according to the embodiment of the present invention. It is.

FIG. 9 is a front view of the insert mounting tool viewed from the back side of the bottom plate for explaining how to hold the mounting member to the holding bracket in the insert mounting tool provided on the bottom plate of the segment formwork according to the embodiment of the present invention. It is.

FIG. 10 is a cross-sectional view of the insert mounting tool and its surroundings for explaining the insert mounting tool when the segment is released from the segment formwork according to the embodiment of the present invention.

FIG. 11 is a cross-sectional view of a segment illustrating a structure of an arc plate-shaped segment provided with a plurality of insert fittings on an inner peripheral surface.

FIG. 12 is a sectional view of a segment mold for explaining a configuration and a structure of a conventional segment mold for manufacturing a segment having an insert fitting provided on an inner peripheral surface.

FIG. 13 is a cross-sectional view of an insert holding portion illustrating a configuration and a structure of an insert holding portion provided on a conventional segment mold.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 segment 2 insert metal fitting 12 bottom plate 13 side plate 14 end plate 31 segment formwork 32 insert mounting tool 33 holding metal fitting 34 mounting member 35 screw portion 36 holding portion 37 tool hole 38 flange portion 39 cut portion 40 locking portion 41 insertion hole 42 Groove portion 44 Horizontal surface 45 Inclined surface L Distance between the flange portion of the mounting member and the locking portion L1 Thickness size of the holding bracket at the position where the groove portion is formed L2 Thickness size of the holding bracket in the horizontal plane S Concrete casting space

Claims (6)

[Claims] 1. A segment formwork for manufacturing an arc-shaped segment having an insert fitting provided on an inner peripheral surface thereof, comprising: a bottom plate forming an inner peripheral surface of the segment; and a bottom plate provided on both sides of the bottom plate. Side plate, and an end plate provided at both ends of the bottom plate, a space surrounded by these bottom plate, side plate and end plate is a concrete casting space, and the bottom plate is provided with the insert fitting. An insert fixture for holding is provided. The insert fixture includes a holding bracket having an insertion hole formed at the center, a threaded portion to which one end of the insert bracket is screwed and attached, and the other end side includes the holding bracket. And a mounting member serving as a holding portion that is engaged and held by being inserted through the insertion hole of the concrete mounting space. A segment formwork characterized by being separated into a flange portion and the holding portion. 2. The mounting member has a locking portion projecting outward in a radial direction at a tip end of the holding portion, and the holding member is configured to allow the holding portion to be inserted into the insertion hole. A groove portion through which the locking portion can pass is formed, and the locking portion locks the lower surface side of the holding bracket by rotating the holding portion by inserting the holding portion into the insertion hole. 2. The segment formwork according to claim 1, wherein the holding portion is held by the holding fitting. 3. The segment formwork according to claim 1, wherein a flange portion is formed in a circumferential direction at a boundary between the screw portion and the holding portion. 4. A horizontal surface is formed on a lower surface of the holding member at a position deviating from a position where the groove is formed, and a thickness dimension of the holding member at the position where the groove is formed is different from that of the flange of the mounting member. It is made smaller than the gap with the stop, the thickness dimension of the holding bracket in the horizontal plane is substantially the same as the gap between the flange portion of the mounting member and the locking portion, and the formation position of the groove and the horizontal plane Between
The inclined surface for guiding the locking portion to the horizontal plane when the holding portion is rotated in a state where the holding portion is inserted into the insertion hole of the holding metal fitting, is provided. Formwork for segments. 5. A cut portion is formed in the vicinity of the flange portion of the mounting member on the holding portion side so as to extend in a circumferential direction, and the mounting member is formed by the cut portion when the segment is released from the mold. The segment formwork according to claim 3 or 4, wherein the segment form is separated into the screw portion and the holding portion. 6. The mounting member according to claim 1, wherein a tool hole having a rectangular cross section is formed at the center of the mounting member, and a tool having a rectangular cross section can be fitted into the tool hole.
The mold for a segment according to any one of the above.