JP4288267B2 - Half PC board driving member used for temporary fixing of roof drain body - Google Patents

Description

  In the present invention, when a roof drain body (hereinafter simply referred to as a “drain body”) of a driving type roof drain is temporarily fixed on a half PC plate by a temporary fixing device before placing cast-in-place concrete. It is related with the driving member for half PC boards used for.

  There is known a half-PC board which is a pre-cast concrete board (hereinafter referred to as “PC board”) produced at a factory, and is formed with a board thickness approximately half the normal board thickness. A construction method is widely adopted in which a plate is disposed on the floor of an RC building and used as a formwork for cast-in-place concrete. In this way, by using the half PC board for the cast-in-place concrete formwork, a general wooden formwork becomes unnecessary, and the truss bars and the top bars protruding from the half PC board are used in the field. Because it can be attached with reinforcement bars of cast concrete, the level is easy to set up, the work of arranging the bars is easy, and it is lighter than a normal PC board, so it is easy to handle and can be carried to the site. There are various advantages such as easy.

  Conventionally, in the construction method as described above, when the drain main body of the driving type roof drain is disposed on the floor surface constructed by placing the cast-in-place concrete on the half PC plate, the drain main body is The cast-in-place concrete is cast in a state of being temporarily fixed on the half PC plate by the temporary fixing device. However, when temporarily fixing the drain body, as shown in FIG. An embedding member d for supporting the lower end of the cylindrical spacer c that holds b at a predetermined height position is used.

  The embedded member d includes an annular peripheral wall g surrounding a circular opening f opened at the center of the substantially rectangular mounting substrate e, and a flange h provided around the inner peripheral surface of the annular peripheral wall g. It has. On the other hand, the temporary fixing device for temporarily fixing the drain main body a is mounted on the cylindrical spacer c, the long screw rod n inserted into the drain pipe portion m of the drain main body a, and the inner bottom surface of the drain tray b. A clamping pin p to be mounted, a tightening nut r that is inserted into the clamping plate p and protrudes upward and is screwed to a protruding end of the screw rod n, and a lower end portion of the screw rod n are swingably connected. Support plate s. Here, the support plate s is formed with a long hole t with one end positioned substantially at the center and biased to one side. When the screw hole n is inserted into the long hole t, as shown in FIG. Further, the support plate s is suspended by the screw thread n in a state where the support plate s is inclined downward due to the offset load.

  In order to temporarily fix the drain body a on the half PC plate j using such a temporary fixing device and the embedded member d, first, as shown in FIG. 12, an insertion hole formed in the half PC plate j. In a state where k and the center of the annular peripheral wall g coincide with each other, the mounting substrate e of the embedded member d is fixed on the half PC plate j with mortar. Here, the half PC plate j on which the drain body a is disposed is often custom-made in accordance with the construction site, and the half PC plate j is disposed on the half PC plate j at the time of factory production. An insertion hole k is formed in advance using a tubular mold material such as a void tube (paper tube) or a vinyl chloride tube at a position corresponding to.

  Then, after fixing the embedded member d on the half PC plate j as described above, the lower end of the cylindrical spacer c is fitted into the annular peripheral wall g of the embedded member d as shown in FIG. The drain plate b is mounted on the upper end of the cylindrical spacer c and the drain body a is held at a predetermined height position, and the support plate s is suspended at the lower end in a downward inclined state. The support plate is inclined downward by inserting the screw 杆 n from above into the insertion hole k of the drain pipe portion m and the half PC plate j, and tilting the screw 杆 n or approaching the hole edge of the insertion hole k. The upper side of s is hooked on the lower surface of the half PC plate j, the screw rod n is moved to the center side of the support plate s in the long hole t, and then the screw rod n is pulled up, thereby Engage both ends horizontally with the lower surface of the half PC plate j, While maintaining this state, as shown in FIG. 11, the drain body a is inserted by inserting the upper end of the screw rod n into the pinching plate p and screwing the tightening nut r to the protruding end to tighten. Is temporarily fixed on the half PC plate j.

  In the embedded member d as described above, when the mortar is fixed on the half PC plate j, it is extremely difficult to accurately match the center of the insertion hole k and the annular peripheral wall g. There was a problem that the drain main body a held by the cylindrical spacer c fitting the lower end to the peripheral wall g is easily displaced from the center of the insertion hole k. Further, when the support plate s suspended in the downwardly inclined state at the lower end of the screw rod n is engaged horizontally with the lower surface of the half PC plate j, the operation is extremely difficult and troublesome as described above. There is a problem that if the screw 杆 n is not gripped by hand until the tightening nut r is screwed, the screw 杆 n falls to the lower floor. Further, at the time of factory production of the half PC plate j, it is necessary to separately use a tubular mold material such as a void tube in order to form the insertion hole k in the half PC plate j in advance. Further, since the half PC board j is premised on placing cast-in-place concrete on the top, the upper surface is usually formed in a rough surface so as to improve the coupling action with the cast-in-place concrete. However, there is a problem that only the periphery of the insertion hole k on which the embedded member d is mounted must be finished smoothly in order to stabilize the embedded member d.

  An object of the present invention is to provide a driving member for a half PC plate used for temporarily fixing a roof drain main body that can solve the conventional problems.

The present invention relates to a cylinder body that is externally fitted to a drain pipe portion of a drain body composed of a drain pan and a drain pipe portion that is coupled downward from the drain pan, and holds the drain pan at a predetermined height position at the upper end. The drain main body is provided by a temporary fixing device including a spacer and a rod-like support plate which is provided with a screw rod standing and is formed along the length direction, and a connecting means for connecting the drain main body and the half PC plate. A half-PC board driving member used for temporary fixing on a half-PC board, which is placed on the concrete formwork for manufacturing the half-PC board, and vertically placed on the placed concrete. And a canopy plate portion covering the upper portion of the concrete blocking cylinder portion, and the cylindrical shape is provided on the canopy plate portion. Spay A fitting portion having a continuous or non-continuous fitting peripheral wall that fits the lower end of the fitting peripheral wall is formed, and the support plate can be inserted from above into the surrounding area by the fitting peripheral wall. While an insertion hole having a narrow opening width compared to the length of the plate is opened, an anchor embedded in the placed concrete is laterally projected on the outer wall surface of the concrete blocking cylinder portion. It is the driving member for half PC boards used for temporary fixation of the roof drain body characterized by being characterized.

  In the above-described configuration, the half-PC plate driving member and the support plate can be formed of metal or hard synthetic resin having appropriate rigidity. Further, the concrete blocking cylinder portion can be formed in a rectangular or circular cross section. Further, the fitting peripheral wall may be a continuous or discontinuous circular shape, and the insertion hole opened in the surrounding area by the fitting peripheral wall may be circular, and the center thereof may be coincident with the center of the fitting peripheral wall. desirable.

  Moreover, the structure which makes the said fitting part a circular convex part provided with the fitting peripheral wall in the outer periphery or a circular recessed part is proposed.

  In addition, a configuration is proposed in which an edge receiving member for horizontally holding the support plate inserted from the insertion hole is disposed at a predetermined height position below the canopy plate portion.

  Further, the rotation of the support plate is controlled by contacting the side surface of the support plate that is rotated in accordance with the screwing operation in the tightening direction of the tightening nut screwed to the screw rod. The structure which provides a movement control piece part is proposed.

  Moreover, the structure which provides the sticking surface part provided with the sticking area | region of the double-sided tape used for fixation with the concrete mold for manufacture on the lower bottom face of the said concrete interruption | blocking cylinder part is proposed.

  As described above, the present invention is arranged on the concrete formwork for manufacturing when the half PC plate is manufactured, and the vertically inserted hole is formed in the placed concrete, and the upper portion of the half PC plate is the half PC plate. A continuous or non-continuous fitting that includes a concrete blocking cylinder portion projecting upward and a canopy plate portion covering an upper portion of the concrete blocking cylinder portion, and the lower end of a cylindrical spacer is fitted to the canopy plate portion. A fitting portion having a peripheral wall is formed, and the support plate can be inserted into the surrounding region by the fitting peripheral wall from above, and the opening width is narrower than the length of the support plate. Half PC board driving used for temporary fixing of the roof drain body in which a hole is opened and an anchor embedded in the placed concrete is laterally projected on the outer wall surface of the concrete blocking cylinder Because it is a member By integrating the concrete blocking cylinder part and the canopy plate part in which the fitting part having the fitting peripheral wall is formed, the insertion hole formed by the concrete blocking cylinder part and the center of the fitting peripheral wall are accurately located. Thus, the drain main body held by the cylindrical spacer that fits the lower end of the fitting peripheral wall does not deviate from the center of the insertion hole. In addition, the support plate can be inserted from above into the canopy plate portion that covers the upper part of the concrete blocking cylinder portion, and the insertion hole having an opening width narrower than the length of the support plate is opened. In addition, the operation of engaging the support plate with the bottom surface of the hole edge of the charging hole can be performed very easily at the upper position of the concrete blocking cylinder portion. That is, as in the prior art, it is possible to eliminate the difficult and troublesome operation that is required when the support plate is horizontally engaged with the lower surface of the half PC plate through the insertion hole. Furthermore, since the concrete blocking cylinder portion can form an insertion hole in the vertical direction in the concrete placed during the production of the half PC plate, there is no need to separately use a tubular mold such as a void pipe as in the prior art. In addition, since the driving member according to the present invention is integrated with the concrete placed when the half PC plate is manufactured, the insertion hole on which the embedded member d (see FIG. 12) is mounted as in the conventional case. The work of finishing the periphery of k smoothly can be eliminated.

  Moreover, in the structure which makes the said fitting part the circular convex part provided with the fitting peripheral wall in the outer periphery, or a circular recessed part, a fitting part is precisely and easily formed by the press work with respect to metal canopy board parts. It becomes possible.

  Further, in the configuration in which the receiving edge member for horizontally holding the support plate inserted from the insertion hole is disposed at a predetermined height position below the canopy plate portion, the support plate is erected on the support plate. Even if the hand is released from the screw rod, the support plate is not dropped by the edge receiving member that holds the support plate.

  Further, the rotation of the support plate is controlled by contacting the side surface of the support plate that is rotated in accordance with the screwing operation in the tightening direction of the tightening nut screwed to the screw rod. In the configuration in which the movement restricting piece portion is provided, the supporting plate does not rotate during the screwing operation in the tightening direction of the tightening nut screwed to the screw rod, and the tightening operation is surely and easily performed. It can be carried out.

  Moreover, in the structure which provides the sticking surface part provided with the sticking area | region of the double-sided tape used for fixation with the concrete mold for manufacture on the lower bottom face of the said concrete interruption | blocking cylinder part, it sticks on the concrete mold for manufacture. Easily install the driving member on the concrete formwork for manufacturing by mounting the concrete blocking cylinder on the double-sided tape that has been worn and attaching the sticking surface provided on the bottom surface of the concrete. Can do.

Below, one Example of this invention is described based on FIGS.
As shown in FIG. 1, the drain main body 1 of the driving-type roof drain includes a circular drain tray 2 at the top thereof, and a drain pipe portion 3 is coupled downward from the center of the inner bottom of the drain tray 2. It has a known shape. Further, the cylindrical spacer 4 fitted on the drain pipe portion 3 has a predetermined height position corresponding to the thickness of the cast-in-place concrete 30 on which the drain body 1 is placed on the half PC plate 5 at the upper end. And the lower end of the cylindrical spacer 4 is fitted with a later-described half-PC plate driving member 11 for holding the cast-in-place concrete 30 to the drain pipe 3 side. The joint 16 is fitted. Further, the drain main body 1 and the half PC plate 5 are connected by a connecting means. The connecting means is erected on the support plate 7 (see FIG. 5) that is engaged with the lower surface of the hole edge of the insertion hole 17 of the half-PC plate driving member 11 to be described later, and substantially at the center of the support plate 7. A screw rod 8, a clamping plate 9 that is attached to the drain tray 2 and serves as a curing lid through which the upper end of the screw rod 8 is inserted, and a protruding end of the screw rod 8 that protrudes upward from the clamping plate 9 A fastening nut 10 that is screwed onto the half PC plate 5, and the connecting means and the cylindrical spacer 4 constitute a temporary fixing device that temporarily fixes the drain body 1 on the half PC plate 5.

  As shown in FIG. 2 to FIG. 4, the half-PC board driving member 11 according to the main part of the present invention includes a concrete blocking cylinder portion 12 and a canopy plate portion 13 covering the top of the concrete blocking cylinder portion 12. The concrete blocking cylinder portion 12 and the canopy plate portion 13 are integrated by welding. Although a steel plate can be suitably used as the material for the half-PC plate driving member 11, it may be made of a hard synthetic resin instead of the steel plate. When it is made of this hard synthetic resin, the concrete blocking cylinder portion 12 and the canopy plate portion 13 may be integrally formed, or may be integrated by bonding with an adhesive after separate molding. Further, in this embodiment, the concrete blocking cylinder portion 12 is formed in a rectangular cross section, and the overall shape of the half PC plate driving member 11 is a cubic shape, but instead the concrete blocking cylinder portion 12 has a circular cross section. The entire shape may be formed as a covered cylinder.

  The height dimension of the concrete blocking cylinder portion 12 is set to be slightly larger than the thickness dimension of the half PC plate 5 so that the upper portion thereof can protrude above the half PC plate 5 ( (See FIG. 1). In addition, a plurality of anchors 14 that are embedded in the concrete that is placed when the half PC plate 5 is manufactured are laterally formed on the outer wall surface of the concrete blocking cylinder portion 12.

  The canopy plate portion 13 is formed with a fitting portion 16 formed of a circular concave portion having a fitting peripheral wall 15 continuous in the circumferential direction with its center aligned with the central axis of the concrete blocking cylinder portion 12. The lower end of the cylindrical spacer 4 can be fitted into the fitting peripheral wall 15 of the fitting portion 16. Further, the fitting portion 16 is provided with an insertion hole 17 concentric with the fitting peripheral wall 15 in an enclosed area formed by the fitting peripheral wall 15. The insertion hole 17 is set such that the support plate 7 with the screw rod 8 standing substantially at the center can be inserted from above, and the opening width is narrower than the length of the support plate 7. Has been. Further, a flange edge 18 having a predetermined width is provided around the hole edge of the insertion hole 17 so that the lower end of the cylindrical spacer 4 can be supported by the flange edge 18.

  In addition, a pair of edge receiving members 19, 19 are disposed at a predetermined height position below the canopy plate portion 13 at positions different from each other by 180 ° around the insertion hole 17. The receiving members 19, 19 can support both ends of the support plate 7 inserted from the insertion hole 17 and hold it horizontally, and extend vertically as shown in FIG. An existing connecting piece 20a, a horizontal mounting piece 20b connected to the upper part of the connecting piece 20a, and a horizontal receiving piece 20c connected to the lower part of the connecting piece 20a. Each has a substantially crank shape in cross section. Then, the receiving piece portions 20c, 20c are fixed to the lower surface of the canopy plate portion 13 by joining means such as welding, respectively, so that the receiving piece portions 20c, 20c are located below the canopy plate portion 13. It is held at a predetermined height position, and both end portions of the support plate 7 can be supported by the receiving piece portions 20c and 20c.

  Further, the edge receiving members 19 and 19 are provided with rotation restricting pieces 21 and 21 rising from one side edge of the receiving pieces 20c and 20c. The rotation restricting pieces 21 and 21 come into contact with the side surface of the support plate 7 that rotates in accordance with the screwing operation of the tightening nut 10 screwed into the screw rod 8 in the tightening direction. 7, and in the state where both ends of the support plate 7 are positioned on the receiving pieces 20 c, 20 c of the receiving members 19, 19, the tightening nut 10 is screwed in the tightening direction. It arrange | positions so that the side surface by the side of the rotation direction of the support plate 7 accompanying rotation operation may be opposed. Further, the other side edges of the receiving piece portions 20c, 20c are in contact with the other side surface of the support plate 7 supported by the receiving piece portions 20c, 20c, so that the supporting plate 7 is prevented from falling off. Low drop-off prevention pieces 22 and 22 project upward. Both end portions of the support plate 7 inserted from the insertion hole 17 are moved to positions where they can be supported by the receiving piece portions 20c and 20c through the space above the drop-off preventing piece portions 22 and 22.

  Further, as shown in FIG. 4, a sticking plate portion 24 having a predetermined width surrounding the lower end opening 23 of the concrete blocking cylinder portion 12 is horizontally disposed on the lower bottom surface of the concrete blocking cylinder portion 12. The lower surface of the sticking plate portion 24 is used as a sticking surface portion 25 having a sticking region of a double-sided tape 27 used for fixing to the manufacturing concrete formwork 26 (see FIG. 7).

Next, the usage method of the driving member 11 for half PC boards which consists of the said structure is demonstrated.
The half PC board driving member 11 is assembled in the half PC board 5 when the half PC board 5 is manufactured. As shown in FIG. 7A, the half PC plate driving member 11 is disposed on a manufacturing concrete formwork 26 made of a surface plate. Here, on the concrete formwork 26 for manufacturing, marking is made at a position corresponding to the position where the drain main body 1 is disposed, and by matching the marking member 11 for half PC plate with the marking, the marking is made at the construction site. The half-PC board driving member 11 can be disposed at an accurate position where the drain body 1 is disposed. At this time, the half PC board driving member 11 is installed by joining the sticking surface portion 25 provided on the lower bottom surface of the concrete blocking cylinder portion 12 and the concrete formwork 26 for manufacture with a double-sided tape 27. Can be easily performed. Although not shown in the drawings, reinforcing bars are arranged in a predetermined form on the concrete formwork 26 for manufacturing.

  Then, as shown in FIG. 7B, a predetermined amount of concrete 28 is placed on the manufacturing concrete formwork 26, and the upper portion of the concrete blocking cylinder 12 projects above the placed concrete 28. To be. After allowing the concrete 28 to harden in this state for a predetermined time, as shown in FIG. 7C, when the concrete PC 26 is removed from the manufacturing concrete formwork 26, the half-PC board driving member 11 is hardened. The half PC board 5 in which the vertical insertion holes 29 are formed at the positions corresponding to the arrangement positions of the drain main body 1 by the concrete blocking cylinder portion 12 is completed. Here, the anchor 14 embedded in the placed concrete 28 is formed on the outer wall surface of the concrete blocking cylinder portion 12 so as to protrude laterally, so that the anchoring action causes the half PC plate driving member 11. Does not fall off from the half PC plate 5.

Next, the procedure for temporarily fixing the drain main body 1 on the construction site on the half PC plate 5 assembled with the half PC plate driving member 11 will be described.
First, the half PC board 5 is installed horizontally in the predetermined place used as the floor part of a building. The half PC plate 5 is used as a cast-in-place concrete form as described above. Then, as shown in FIG. 8 (a), the upper part of the screw rod 8 erected on the support plate 7 is gripped, and the support plate 7 is inserted from the insertion hole 17 of the canopy plate part 13 into the concrete blocking cylinder part 12. Then, the support plate 7 is returned to the horizontal state as shown in FIG. 8 (b), and both end portions of the support plate 7 are shown in FIG. 8 (c). Is placed on the receiving piece portions 20c, 20c of the receiving edge members 19, 19 and held horizontally. Thereby, the support plate 7 does not fall even if the hand is released from the screw rod 8, and the screw rod 8 is erected vertically from the half-PC plate driving member 11 upward. Become.

  In this state, as shown in FIG. 1, the lower end of the cylindrical spacer 4 is fitted into the fitting peripheral wall 15 (see FIG. 4) of the fitting portion 16 formed in the canopy plate portion 13, and the cylindrical shape is obtained. The drain pan 2 is placed on the upper end of the spacer 4 and held at a predetermined height position. Next, the upper portion of the screw rod 8 is inserted into the pinching plate 9 that also serves as a curing lid, the pinching plate 9 is attached to the drain pan 2, and the protruding end of the screw rod 8 protruding upward from the pinching plate 9 is attached. The tightening nut 10 is screwed and screwed in the tightening direction. As a result, the support plate 7 is lifted from the receiving edge members 19 and 19 through the upward screwing action of the screw rod 8 and engaged with the lower surface of the hole edge of the insertion hole 17 (see FIG. 4). Become. Here, when the tightening nut 10 is screwed in the tightening direction as described above, the support plate 7 is rotated in the same direction, but the rotation provided on the edge receiving members 19, 19 is also performed. When the side surfaces of the support plate 7 abut against the restricting pieces 21 and 21 and the rotation of the support plate 7 is restricted, the tightening operation of the tightening nut 10 can be performed reliably and easily.

  As described above, when the support plate 7 is engaged with the lower surface of the hole edge of the insertion hole 17, the clamping plate 9 is pressed downward by the tightening force of the tightening nut 10. Since the drain pan 2 is sandwiched between 9 and the cylindrical spacer 4, the drain body 1 can be temporarily fixed so as not to move as shown in FIG. Thereafter, a cast-in-place concrete 30 (see FIG. 9) having a predetermined thickness is placed on the half PC plate 5, and after the hardening, as shown in FIG. 9, the support plate 7, the screw rod 8, the pressing plate 9, The tightening nut 10 is removed, the strainer 31 is mounted on the drain pan 2, and the construction is completed by fitting the upper end of the dredge pipe 32 to the drain pipe portion 3 from below.

  As described above, according to the present invention, the concrete blocking cylinder portion 12 and the canopy plate portion 13 on which the fitting portion 16 having the fitting peripheral wall 15 is formed are integrated, thereby providing a concrete blocking cylinder portion. The drain body 1 held by the cylindrical spacer 4 that fits the lower end of the fitting peripheral wall 15 can be precisely aligned with the center of the fitting peripheral wall 15. There is no deviation from the center of 29. Further, the support plate 7 can be inserted into the canopy plate portion 13 covering the upper part of the concrete blocking cylinder portion 12 from above, and the insertion hole 17 having an opening width narrower than the length dimension of the support plate 7 is opened. As a result, the engagement operation of the support plate 7 with the lower surface of the hole edge of the charging hole 17 can be performed very easily at the upper position of the concrete blocking cylinder portion 12. Furthermore, since the concrete blocking cylinder portion 12 can form the vertical insertion hole 29 in the concrete 28 placed when the half PC plate 5 is manufactured, it is necessary to separately use a tubular mold material such as a void pipe as in the prior art. There is no. Further, since the half-PC board driving member 11 is integrated with the concrete 28 placed when the half-PC board 5 is manufactured, the embedded member d (see FIG. 12) is mounted as in the conventional case. The work of finishing the periphery of the insertion hole k to be smooth can be eliminated.

  In addition, since receiving edge members 19 and 19 for horizontally holding the support plate 7 inserted from the insertion hole 17 are disposed at a predetermined height position below the canopy plate portion 13, Even if the hand is released from the standing screw rod 8, the support plate 7 is not dropped by the edge receiving members 19 and 19 that hold the support plate 7. Thereby, the temporary fixing operation | work of the drain main body 1 can be performed easily and smoothly using both hands.

  Further, the support plate 7 abuts against the side surface of the support plate 7 that rotates as the tightening nut 10 screwed into the screw rod 8 rotates in the tightening direction. Since the rotation restricting pieces 21 and 21 for restricting the rotation of the support plate 7 are provided, the support plate 7 can be rotated when the tightening nut 10 screwed into the screw rod 8 is screwed in the tightening direction. Therefore, the tightening operation can be performed reliably and easily.

  Moreover, since the sticking surface part 25 provided with the sticking area | region of the double-sided tape 27 used for fixation with the concrete mold 26 for manufacture on the lower bottom face of the said concrete interruption | blocking cylinder part 12 was provided, on the concrete mold 26 for manufacture For the half PC board on the concrete formwork 26 for manufacture by mounting the concrete blocking cylinder part 12 on the double-faced tape 27 attached to the base and attaching the adhesive surface part 25 provided on the bottom surface thereof. The driving member 11 can be easily installed.

  In addition, in the said Example, although the fitting part 16 formed in the canopy board part 13 was made into the circular recessed part equipped with the fitting peripheral wall 15 continued in the circumferential direction on the outer periphery, it replaces with this figure. It is good also as a circular convex part provided with the fitting surrounding wall 15 which continues in the circumferential direction on the outer periphery like the 1st modified example shown to 10 (a). As described above, the fitting portion 16 is formed into a circular convex portion or a circular concave portion having the fitting peripheral wall 15 continuous on the outer periphery, so that the fitting portion 16 can be precisely and easily formed by pressing the metal canopy plate portion 13. Can be formed. Moreover, the fitting part 16 is welded along the circumferential direction by welding the separately formed fitting peripheral wall 15 to the upper surface of the canopy plate part 13 as in the second modified example shown in FIG. It is also possible to arrange them continuously or discontinuously.

It is a longitudinal cross-sectional view which shows the state which fixed the drain main body 1 on the half PC board 5 provided with the driving member 11 for half PC boards concerning this invention. It is an external appearance perspective view of the driving member 11 for half PC boards same as the above. It is a top view of the driving member 11 for half PC boards same as the above. It is a longitudinal cross-sectional view of the driving member 11 for half PC boards same as the above. 3 is an external perspective view of a support plate 7 and a screw rod 8. FIG. It is an external perspective view of the edge receiving members 19 and 19. FIG. 10 is an explanatory view showing a manufacturing process of the half PC plate 5. It is explanatory drawing which shows the arrangement | positioning process of the support plate 7 with respect to the driving member 11 for half PC boards. FIG. 3 is a longitudinal sectional view showing a construction completion state of the drain body 1. (A) is a partial longitudinal cross-sectional view of the driving member 11 for half PC board which shows the structure of a 1st modification, and (b) respectively shows the structure of a 2nd modification. It is a longitudinal cross-sectional view which shows the state which fixed the drain main body a on the half PC board j using the conventional embedded member d. It is explanatory drawing which shows the state which fixed the embedding member d on the half PC board j. It is explanatory drawing which shows the operation state which engages the lower surface of the half PC board j with the support plate s suspended by the screw rod n in the downward inclination state.

Explanation of symbols

1 Drain body (Roof drain body)
2 Drain pan 3 Drain pipe portion 4 Cylindrical spacer 5 Half PC plate 7 Support plate 8 Screw rod 10 Tightening nut 11 Half PC plate driving member 12 Concrete blocking cylinder portion 13 Canopy plate portion 14 Anchor 15 Fitting peripheral wall 16 Fitting Joint part 17 Insertion hole 19 Receiving member 21 Rotation restricting piece part 25 Adhering surface part 26 Manufacturing concrete form 27 Double-sided tape 28 Concrete 29 Insertion hole

Claims (5)

A cylindrical spacer that is externally fitted to the drain pipe portion of the drain main body composed of a drain tray and a drain pipe portion coupled downward from the drain tray, and holds the drain tray at a predetermined height position at the upper end. The drain main body is mounted on the half PC plate by a temporary fixing device having a rod-like support plate that is erected with a screw rod and formed along the length direction, and a connecting means for connecting the drain main body and the half PC plate. It is a driving member for half PC board used when temporarily fixing to
A concrete blocking cylinder portion which is arranged on a concrete formwork for production of the half PC plate, forms a vertical insertion hole in the placed concrete, and has an upper portion protruding above the half PC plate; A canopy plate portion covering an upper portion of the concrete blocking cylinder portion, and a fitting portion having a continuous or discontinuous fitting peripheral wall for fitting the lower end of the cylindrical spacer to the canopy plate portion. The support plate can be inserted from above into the surrounding area formed by the fitting peripheral wall, and the insertion hole having a narrow opening width compared to the length of the support plate is opened. A half-PC plate driving member used for temporarily fixing a roof drain body, wherein an anchor embedded in the placed concrete is laterally projected on the outer wall surface of the concrete blocking cylinder.   2. The half-PC board driving member used for temporarily fixing a roof drain body according to claim 1, wherein the fitting portion is a circular convex portion or a circular concave portion having a fitting peripheral wall on the outer periphery.   The receiving edge member which hold | maintains horizontally the support plate inserted from the insertion hole in the predetermined height position under the canopy board part is arrange | positioned. A driving member for a half PC plate used for temporarily fixing the described roof drain body.   A rotation restricting piece that abuts against the side surface of the support plate that rotates in response to the screwing operation in the tightening direction of the tightening nut that is screwed to the screw rod with the receiving member and restricts the rotation of the support plate. The driving part for half PC boards used for temporary fixation of the roof drain main body according to claim 3 provided with a section. 5. The sticking surface part provided with the sticking area | region of the double-sided tape used for fixation with the concrete formwork for manufacture on the lower bottom face of a concrete interruption | blocking cylinder part, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. A driving member for a half PC plate used for temporarily fixing the roof drain body described above.

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