JP2019152027A - Retainer member and seal unit - Google Patents

Abstract

To provide a retainer member and a seal unit capable of improving efficiency at the time of installation.SOLUTION: A retainer member is provided with a first plate having a width larger than the joint width between adjacent frame mold units of the remaining frame mold, and a second plate which intersects the first plate and has a thickness smaller than the width of the joint. The second plate includes a hole.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a pressing member and a seal unit.

  Residual formwork may be used to form concrete rails. The remaining formwork is a formwork that does not need to be removed after placing concrete. For example, Patent Document 1 describes an example of a remaining mold.

JP2013-124518A

  As described in Patent Document 1, a waterproof structure is provided at a joint between adjacent formwork units. In the waterproof structure of Patent Document 1, a plurality of bolts and nuts are used to press the presser plate against the waterproof packing. Since a certain amount of time is required to form such a waterproof structure, a technique capable of improving work efficiency has been desired.

  An object of this invention is to provide the pressing member and seal unit which can improve the working efficiency at the time of construction.

  In order to achieve the above object, a presser member according to an aspect of the present disclosure includes a first plate having a width larger than a joint width between adjacent formwork units of a remaining formwork, and intersecting the first plate. And a second plate having a thickness smaller than the width of the joint, and the second plate includes a hole.

  Thereby, according to the pressing member, the joint can be covered with the first plate and the second plate can be projected to the back side of the mold unit. The clamping member pushes the mold unit by inserting and rotating the clamping member into the hole of the second plate protruding to the back side of the mold unit. The joint is sealed by crushing the packing disposed between the first plate and the formwork unit. Thus, according to the pressing member, the joint can be closed by rotating the tightening member. For example, the operation is easier than when the packing is crushed using bolts and nuts. Therefore, the pressing member of this embodiment can improve the work efficiency at the time of construction.

  In the presser member according to the present disclosure, the first plate includes two protrusions protruding from a surface in contact with the second plate, and the one protrusion is opposite to the other protrusion with respect to the second plate. It is desirable to be located in

  Thereby, even if the packing expands in the direction along the first plate when the packing is crushed, the protrusion restricts excessive expansion of the packing. For this reason, according to the holding member, it can suppress that packing protrudes from the clearance gap between a 1st plate and a formwork component.

  In order to achieve the above object, a seal unit according to an aspect of the present disclosure includes the pressing member, a packing that contacts the first plate, and a fastening member that penetrates the hole. The length of the fastening member in the direction perpendicular to the plate changes according to the rotation angle of the fastening member.

  Thereby, when the fastening member is rotated, the mold unit is pressed against the packing. The joint is sealed by crushing the packing disposed between the first plate and the formwork unit. Thus, according to the seal unit, the joint can be closed by rotating the tightening member. For example, the operation is easier than when the packing is crushed using bolts and nuts. Therefore, the sealing unit of this embodiment can improve the work efficiency at the time of construction.

  In the seal unit of the present disclosure, it is preferable that the hole is circular, and the fastening member includes a first surface that is a surface along an inner wall of the hole.

  Thereby, since rotation of a clamping member becomes smooth, working efficiency improves more. Moreover, when the fastening member receives a reaction force from the mold unit, the first surface comes into contact with the inner wall of the hole, so that the posture of the fastening member is stabilized. For this reason, it becomes easy to hold | maintain the state by which the formwork unit was pressed on packing.

  In the seal unit of the present disclosure, it is preferable that the tightening member includes a second surface that is a planar surface perpendicular to the radial direction of the hole.

  Thereby, rotation of a clamping member is suppressed because a 2nd surface contacts a formwork unit. For this reason, it becomes easy to hold | maintain the state by which the formwork unit was pressed on packing.

  According to the presser member and the seal unit of the present disclosure, it is possible to improve work efficiency during construction.

FIG. 1 is a perspective view of a handrail provided with a residual mold according to the present embodiment. FIG. 2 is a rear view of the remaining mold according to the present embodiment. 3 is a cross-sectional view taken along line AA in FIG. FIG. 4 is an enlarged view of the seal unit in FIG. 5 is a cross-sectional view taken along the line BB in FIG. 6 is a cross-sectional view taken along the line CC in FIG. 7 is a cross-sectional view taken along line BB in FIG. 4 in a state before the fastening member is rotated. 8 is a cross-sectional view taken along the line DD in FIG. FIG. 9 is an enlarged view of a lower end portion of the seal unit in FIG. 10 is a cross-sectional view taken along line EE in FIG.

  Hereinafter, the present invention will be described in detail with reference to the drawings. The present invention is not limited by the following modes for carrying out the invention (hereinafter referred to as embodiments). In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those in a so-called equivalent range. Furthermore, the constituent elements disclosed in the following embodiments can be appropriately combined.

(Embodiment)
FIG. 1 is a perspective view of a handrail provided with a residual mold according to the present embodiment. FIG. 2 is a rear view of the remaining mold according to the present embodiment. 3 is a cross-sectional view taken along line AA in FIG. The handrail 100 shown in FIG. 1 is a wall provided at both ends of the road. The handrail 100 is made of concrete. The handrail 100 is provided in a bridge, for example. As shown in FIG. 1, the handrail 100 includes a floor slab 91, a frame 92, and a remaining mold 10.

  The floor slab 91 supports the housing 92 and the remaining mold 10. The casing 92 is reinforced concrete. The frame 92 is formed by the floor slab 91, the remaining mold 10 and the mold 99 shown in FIG. The mold 99 is made of wood, for example. After the reinforcing bars are arranged in the space surrounded by the floor slab 91, the remaining mold 10 and the mold 99, concrete is poured. A housing 92 is formed by the concrete being solidified. After the concrete has hardened, the formwork 99 is removed, but the remaining formwork 10 is left as an exterior material for the handrail 100.

  In the following description, an XYZ orthogonal coordinate system is used. The Y axis is parallel to the direction in which the rail 100 extends. The Z axis is perpendicular to the floor slab 91. The X axis is perpendicular to both the Y axis and the Z axis. The direction along the X axis is described as the X direction, the direction along the Y axis is described as the Y direction, and the direction along the Z axis is described as the Z direction. The direction from the rail 100 to the center of the road is the + X direction. The right direction when the rail 100 is viewed from the center of the road is defined as the + Y direction. The direction in which the rail 100 is seen from the floor slab 91 is defined as the + Z direction.

  As shown in FIGS. 2 and 3, the remaining mold 10 includes a mold unit 1, a bracket 81, a bracket 82, a diagonal member 83, a support rod 85, a separator 87, a connecting member 86, and a seal. A unit 5.

  As shown in FIG. 3, the mold unit 1 includes a plurality of mold component members 2 and a plurality of connecting units 3. The plurality of formwork component members 2 are stacked in the Z direction. The formwork component 2 at the lower end is in contact with the vertical plate 95 fixed to the floor slab 91 via a sealant or the like. The formwork component 2 is a long member extending in the Y direction. The mold component 2 is, for example, an aluminum alloy extruded shape. The formwork component 2 includes a base portion 21 and an arm portion 22. The base part 21 is a plate-like member perpendicular to the X direction. The arm portion 22 is a plate-like member that intersects with the base portion 21. The arm portion 22 extends from the base portion 21 in the + X direction and the + Z direction.

  As shown in FIG. 3, the connecting unit 3 connects a plurality of formwork constituting materials 2. The connection unit 3 includes a vertical member 31 and a plurality of fastening members 33. The vertical member 31 is a substantially L-shaped member and extends in the Z direction. The vertical member 31 is in contact with the arm portion 22 of the formwork component 2. The fastening member 33 connects the vertical member 31 and the arm portion 22. The fastening member 33 includes, for example, a mounting plate, a bolt, and a nut.

  As shown in FIG. 3, the bracket 81 and the bracket 82 are fixed to the floor slab 91 and support the mold unit 1. The bracket 81 is connected to the vertical member 31. The bracket 82 is connected to the vertical member 31 via the diagonal member 83.

  As shown in FIG. 3, the support rod 85 is a member that is supported by the vertical member 31 and extends in the Y direction. The support rod 85 is fixed to the vertical member 31 with, for example, a bolt and a nut. For example, the support rod 85 is bridged between two adjacent vertical members 31. The support rod 85 may be bridged over three or more vertical members 31.

  As shown in FIG. 3, the separator 87 is a member for positioning the mold 99. The separator 87 is rod-shaped and extends in the X direction. The separator 87 is fixed to the support rod 85 by a connecting member 86. The connecting member 86 is made of, for example, metal, and fixes the separator 87 to the support rod 85 with bolts or the like. The support rod 85 and the connecting member 86 make it easier to install the separator 87 than when the separator 87 is fixed to the vertical member 31 by welding. In addition, since the support rod 85 extends in the Y direction, the mounting position of the separator 87 is not easily limited.

  FIG. 4 is an enlarged view of the seal unit in FIG. 5 is a cross-sectional view taken along the line BB in FIG. 6 is a cross-sectional view taken along the line CC in FIG. 7 is a cross-sectional view taken along line BB in FIG. 4 in a state before the fastening member is rotated. 8 is a cross-sectional view taken along the line DD in FIG. FIG. 9 is an enlarged view of a lower end portion of the seal unit in FIG. 10 is a cross-sectional view taken along line EE in FIG.

  The seal unit 5 is a member for closing the joint 11 between the adjacent mold units 1. The seal unit 5 suppresses leakage of water or cement from the joint 11. As shown in FIG. 5, the seal unit 5 includes a pressing member 50, a packing 54, and a tightening member 55.

  As shown in FIG. 5, the pressing member 50 includes a first plate 51 and a second plate 52. The holding member 50 is, for example, an aluminum alloy extruded shape. The first plate 51 and the second plate 52 are integrally formed.

  The first plate 51 is a plate-like member. The width L51 of the first plate 51 is larger than the width L11 of the joint 11 between the adjacent formwork units 1. The width L51 is the length of the first plate 51 in the Y direction. The width L11 is the length of the joint 11 in the Y direction. The first plate 51 is disposed on the −X direction side with respect to the mold component 2. The first plate 51 covers the joint 11. The first plate 51 includes two protrusions 511 protruding from the surface in contact with the second plate 52 (surface on the + X direction side). That is, the protrusion 511 protrudes in the + X direction (the direction approaching the formwork component 2). One protrusion 511 is located on the opposite side of the second plate 52 from the other protrusion 511. That is, one protrusion 511 is arranged on each side of the second plate 52. In the present embodiment, the protrusion 511 is disposed at the end of the first plate 51 in the Y direction. Therefore, the first plate 51 is substantially U-shaped when viewed from the Z direction.

  As shown in FIG. 5, the second plate 52 is a plate-like member that intersects the first plate 51. For example, in the present embodiment, the second plate 52 is perpendicular to the first plate 51. The second plate 52 projects in the + X direction from the center of the first plate 51 in the Y direction. The second plate 52 has a thickness L52 that is smaller than the width L11 of the joint 11. The thickness L52 is the length of the second plate 52 in the Y direction. The second plate 52 penetrates the joint 11. As shown in FIG. 6, the second plate 52 includes a plurality of holes 521 penetrating in the Y direction. The shape of the hole 521 viewed from the Y direction is circular. The plurality of holes 521 are arranged in the Z direction at a predetermined interval.

  The packing 54 is a member for closing a gap between the first plate 51 and the mold component 2. The packing 54 is, for example, rubber. An example of rubber is ethylene propylene diene rubber (EPDM), for example. As shown in FIG. 5, the packing 54 is disposed on both sides of the second plate 52. The packing 54 is in contact with the surface on the + X direction side of the first plate 51 and the surface on the −X direction side of the formwork component 2.

  The fastening member 55 is a member for pressing the formwork component 2 against the packing 54. The fastening member 55 is, for example, an aluminum alloy extruded shape. The length L55 of the fastening member 55 is larger than the width L11 of the joint 11. The length L55 is the length of the fastening member 55 in the Y direction. Further, the length L55 is larger than the width L51 of the first plate 51. The fastening member 55 is a plate-like member and has a shape that can be inserted into the hole 521 of the second plate 52. That is, the circumscribed circle with respect to the outer shape when the fastening member 55 is viewed from the longitudinal direction is smaller than the circle drawn by the hole 521. As shown in FIGS. 4 and 5, the tightening member 55 passes through the hole 521. As shown in FIG. 6, the tightening member 55 includes a first surface 551 and a second surface 552.

  The first surface 551 is a curved surface along the inner wall of the hole 521. The second surface 552 is located on the opposite side to the first surface 551 with respect to the center 521 c of the hole 521. The second surface 552 is a planar surface perpendicular to the radial direction of the hole 521 (the direction perpendicular to the Y direction). That is, the second surface 552 is a planar surface perpendicular to a straight line passing through the center 521c of the hole 521 when viewed from the axial direction (Y direction) of the hole 521. The thickness of the fastening member 55 decreases from the second surface 552 side toward the first surface 551 side. That is, the fastening member 55 has a substantially trapezoidal shape when viewed from the Y direction.

  As shown in FIGS. 6 and 8, the length D55 of the fastening member 55 in the direction perpendicular to the first plate 51 (X direction) changes according to the rotation angle of the fastening member 55. The rotation angle is an angle at which the tightening member 55 is rotated around a rotation axis parallel to the Y direction on the basis of an arbitrary state in which the longitudinal direction of the tightening member 55 is along the Y direction. As shown in FIG. 6, the length D55 is maximum when the second surface 552 is perpendicular to the X direction. When the fastening member 55 inserted into the hole 521 is rotated, the fastening member 55 pushes the formwork component 2 toward the −X direction. For this reason, the formwork component 2 is pressed against the packing 54. The tightening member 55 may be rotated by an operator's hand, or may be rotated while being held by a tool or the like. The load applied to the packing 54 by the fastening member 55 increases as the second surface 552 approaches the formwork component 2. That is, the load applied to the packing 54 by the fastening member 55 increases as the angle formed by the second surface 552 with respect to the plane perpendicular to the X direction decreases. When the fastening member 55 presses the formwork constituent material 2 against the packing 54, the fastening member 55 receives a reaction force from the formwork constituent material 2 due to the elastic force of the packing 54. For this reason, rotation of the fastening member 55 is suppressed.

  The thickness (length in the X direction) of the packing 54 before the fastening member 55 is inserted into the hole 521 or before the fastening member 55 inserted into the hole 521 is rotated as shown in FIG. (See FIG. 8). The thickness of the packing 54 in a state where the second surface 552 is perpendicular to the X direction is defined as a thickness T54a (see FIG. 6). Since the packing 54 is crushed (deformed) by the rotation of the fastening member 55, the thickness T54a is smaller than the thickness T54b. For example, in the present embodiment, the thickness T54a is 2.5 mm, and the thickness T54b is 5 mm. By sealing the packing 54 by a predetermined amount, the sealability of the joint 11 is improved.

  Concrete is poured in a state where the packing 54 is crushed by the fastening member 55. The fastening member 55 remains inside as a part of the remaining mold 10. Since the joint 11 is sealed by the packing 54, the leakage of water or cement from the joint 11 is suppressed.

  As shown in FIG. 9, the seal unit 5 includes a fixing member 59. For example, the fastening member 55 disposed at the lower end portion of the joint 11 includes a female screw 55a. In the fastening member 55 arranged at the lower end portion of the joint 11, the second surface 522 is perpendicular to the Z direction. The fixing member 59 is a bolt and meshes with the female screw 55a and penetrates the female screw 55a. The tip of the fixing member 59 pushes the formwork component 2. The packing 54 is crushed when the fixing member 59 presses the formwork component 2. Further, the rotation of the tightening member 55 is restricted by the fixing member 59.

  When constructing the remaining mold 10, the mold unit 1 assembled at a factory or the like is transported to the site. Next, each formwork unit 1 is fixed to the floor slab 91 via the bracket 81 and the bracket 82. Next, the second plate 52 of the pressing member 50 is inserted into the joint 11 between the adjacent mold units 1. At this time, the packing 54 is disposed between the first plate 51 and the formwork component 2. Next, the fastening member 55 is inserted into the hole 521 of the second plate 52. As a result, the state shown in FIGS. 7 and 8 is obtained. Next, the packing 54 is crushed by rotating the fastening member 55. As a result, the state shown in FIGS. 5 and 6 is obtained. Thereafter, the concrete is poured into a space surrounded by the remaining mold 10, the mold 99, and the floor slab 91, whereby the rail 100 is formed.

  In the pressing member 50, the first plate 51 and the second plate 52 are not necessarily formed integrally. For example, the 2nd plate 52 may be joined to the 1st plate 51 as another member. Further, the second plate 52 may not be perpendicular to the first plate 51. The second plate 52 only needs to intersect at least the first plate 51. The 2nd plate 52 should just have the shape which protrudes in the back side of the joint 11 when the 1st plate 51 is arrange | positioned so that the joint 11 may be covered.

  The material of each component of the seal unit 5 is not limited to the materials described above. The pressing member 50 and the fastening member 55 do not have to be an aluminum alloy extruded shape, and may be other metals. The packing 54 may not be ethylene propylene diene rubber, and may be other rubber or resin.

  The shape of the tightening member 55 may not be the shape described above. The fastening member 55 only needs to have a shape capable of pressing the formwork component 2 against the packing 54 in accordance with the rotation angle in a state of being inserted into the hole 521. The fastening member 55 may be not circular when viewed from the Y direction. For example, the tightening member 55 may be polygonal or elliptical when viewed from the Y direction.

  The shape of the hole 521 of the second plate 52 may not be circular. The hole 521 of the second plate 52 is not particularly limited as long as it can insert the tightening member 55 and allows the tightening member 55 to rotate. For example, the hole 521 may be a polygon or an ellipse as viewed from the Y direction.

  The seal unit 5 does not necessarily have to include the fixing member 59 shown in FIG. Also at the lower end portion of the joint 11, the packing 54 may be crushed when the second surface 522 is in contact with the formwork component 2.

  As described above, the pressing member 50 intersects the first plate 51 with the first plate 51 having the width L51 larger than the width L11 of the joint 11 between the adjacent mold units 1 of the remaining mold 10. And a second plate 52 having a thickness L52 smaller than the width L11 of the joint 11. The second plate 52 includes a hole 521.

  Thereby, according to the pressing member 50, the joint 11 can be covered by the first plate 51 and the second plate 52 can be projected to the back side of the mold unit 1. The clamping member 55 pushes the mold unit 1 by inserting and rotating the clamping member 55 into the hole 521 of the second plate 52 protruding to the back side of the mold unit 1. The joint 11 is sealed by crushing the packing 54 disposed between the first plate 51 and the mold unit 1. As described above, according to the presser member 50, the joint 11 can be closed by rotating the tightening member 55. For example, the operation is easier than when the packing 54 is crushed by using bolts and nuts. Therefore, the pressing member 50 of this embodiment can improve the work efficiency at the time of construction.

  In the pressing member 50, the first plate 51 includes two protrusions 511 that protrude from the surface with which the second plate 52 contacts. One protrusion 511 is located on the opposite side of the second plate 52 from the other protrusion 511.

  Thereby, even if the packing 54 is crushed and expands in the direction along the first plate 51, the protrusion 511 restricts excessive expansion of the packing 54. For this reason, according to the holding member 50, it can suppress that the packing 54 protrudes from the clearance gap between the 1st plate 51 and the mold frame structural material 2. FIG.

  The seal unit 5 of this embodiment includes a pressing member 50, a packing 54 that contacts the first plate 51, and a tightening member 55 that penetrates the hole 521. The length D55 of the fastening member 55 in the direction perpendicular to the first plate 51 changes according to the rotation angle of the fastening member 55.

  Accordingly, when the fastening member 55 is rotated, the mold unit 1 is pressed against the packing 54. The joint 11 is sealed by crushing the packing 54 disposed between the first plate 51 and the mold unit 1. Thus, according to the seal unit 5, the joint 11 can be closed by rotating the fastening member 55. For example, the operation is easier than when the packing 54 is crushed by using bolts and nuts. Therefore, the seal unit 5 of this embodiment can improve the work efficiency at the time of construction.

  In the seal unit 5, the hole 521 is circular. The tightening member 55 includes a first surface 551 that is a surface along the inner wall of the hole 521.

  Thereby, since the rotation of the tightening member 55 becomes smooth, the working efficiency is further improved. Further, when the tightening member 55 receives a reaction force from the mold unit 1, the first surface 551 contacts the inner wall of the hole 521, so that the posture of the tightening member 55 is stabilized. For this reason, the state where the mold unit 1 is pressed against the packing 54 is easily maintained.

  In the seal unit 5, the fastening member 55 includes a second surface 552 that is a planar surface perpendicular to the radial direction of the hole 521.

  Thereby, rotation of the fastening member 55 is suppressed by the second surface 552 being in contact with the mold unit 1. For this reason, the state where the mold unit 1 is pressed against the packing 54 is easily maintained.

DESCRIPTION OF SYMBOLS 1 Formwork unit 10 Remaining formwork 11 Joint 100 Hand rail 2 Formwork component 21 Base part 22 Arm part 3 Connection unit 31 Vertical member 33 Fastening member 5 Sealing unit 50 Holding member 51 First plate 511 Protrusion 52 Second plate 521 Hole 521c Center 54 Packing 55 Tightening member 55a Female screw 551 First surface 552 Second surface 59 Fixing member 81, 82 Bracket 83 Diagonal material 85 Support rod 86 Connecting member 87 Separator 91 Floor slab 92 Housing 99 Formwork

Claims (5)

A first plate having a width greater than the joint width between adjacent formwork units of the remaining formwork;
A second plate intersecting with the first plate and having a thickness smaller than the width of the joint;
With
The second plate includes a hole. The first plate includes two protrusions protruding from a surface with which the second plate contacts,
The pressing member according to claim 1, wherein one of the protrusions is located on the opposite side of the second plate from the other protrusion. The presser member according to claim 1 or 2,
Packing in contact with the first plate;
A tightening member penetrating the hole;
With
The length of the fastening member in a direction perpendicular to the first plate changes according to a rotation angle of the fastening member. The hole is circular;
The seal unit according to claim 3, wherein the tightening member includes a first surface that is a surface along the inner wall of the hole. The seal unit according to claim 3, wherein the tightening member includes a second surface that is a planar surface perpendicular to the radial direction of the hole.