JP2012158900A - Opening frame body of building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening frame body of a building, which improves work efficiency at a site and can be properly and firmly fixed to the building.SOLUTION: An opening frame body is fixed to an opening 15 disposed in a floor part 1. The opening frame body comprises an outer base frame 53 which is disposed along the inner peripheral surface of the opening 15, an outer frame upper collar part 54 extending outward from the upper end of the outer base frame 53, an outer frame lower collar part 55 extending inward from the lower end of the outer base frame 53, a fixing modified bolt 7 projecting downward from the outer frame lower collar part 55, and a holding fixture 8 which has a screw hole 85 to be screwed with the fixing modified bolt 7 and holds the floor part 1 between the fixture and the outer frame upper collar part 54. The modified bolt 7 and the screw hole 85 of the holding fixture 8 are provided with threaded regions 76a and 85a having threaded parts 761 and 851 which engage each other respectively, and non-threaded regions 76b and 85b which are opposed to the other threaded parts 761 and 851 and release engagement with the threaded parts 761 and 851, continuously along the axial directions, respectively.

Description

  TECHNICAL FIELD The present invention relates to a frame attached to a floor opening used for underfloor inspection, underfloor storage, etc., or a ceiling or wall opening used for inspection of a ceiling or a wall interior.

  Conventionally, various openings are provided in a building. For example, an opening may be provided in a floor for underfloor inspection or underfloor storage. In this case, a frame is generally attached to the opening. Various fixing structures for the peripheral edge of the opening of the frame have been proposed depending on the structure of the building such as the floor.

  For example, Patent Document 1 discloses a structure for fixing a frame body to a floor portion where no joists are provided, and an inner frame is attached to the periphery of a lid body that closes an opening of the floor portion, and this inner frame is fitted. A fixing structure for the floor of the outer frame to be joined is shown. Specifically, the outer frame includes a vertical piece that abuts the inner peripheral surface of the opening of the floor, an upper flange that extends outward from the upper end of the vertical piece, and an inner side from the lower end of the vertical piece. A lower flange that extends, a mounting screw that is inserted through a through-hole formed in the lower flange, and a fixing bracket that is screwed to the mounting screw, and the fixing bracket is rotated by rotating the mounting screw. The opening peripheral edge of the floor portion is sandwiched between the fixing bracket and the upper flange.

  When this outer frame is fixed to the opening periphery of the floor, the upper flange of the outer frame is placed on the opening periphery, and the fixing bracket is disposed below the opening periphery of the floor. In this state, by rotating the mounting screw, the fixing bracket is raised and the fixing bracket is pressed against the lower surface of the floor portion, whereby the outer frame is fixed to the opening peripheral edge portion of the floor portion.

JP 2002-294999 A

  By the way, there are various thicknesses of the floor to which the outer frame is fixed, and it is inefficient to change the length of the mounting screw for each thickness of the floor, so the mounting screw is set to be relatively long. Has been.

  However, if the length of the mounting screw is set long, when the floor is sandwiched between the upper flange and the fixing bracket, the mounting screw is rotated until the distance between the two reaches a position corresponding to the floor thickness. The amount of rotation increased, and there was a problem in terms of work efficiency in the field.

  Also, the mounting screw may be tightened too much in an attempt to strengthen the clamping state between the upper flange of the outer frame and the fixing bracket. In this case, the lower flange is inclined by the tightening force of the mounting screw. The fitting state with the inner frame sometimes deteriorated.

  These problems are not limited to the frame attached to the opening of the floor, but may occur in the same manner for the frame attached to the opening of the ceiling or wall.

  The present invention has been made in view of the above-described conventional problems, and is a frame for an opening in a building that can be appropriately and firmly fixed to a floor or a ceiling while improving work efficiency in the field. The purpose is to provide.

  In order to solve the above-mentioned problem, a frame for an opening in a building according to the present invention is an opening frame to be attached to an opening provided in a building, and is arranged along an inner peripheral surface of the opening. A base frame disposed on one end of the base frame and mounted on the surface of the peripheral edge of the opening, and a flange on the other end provided on the other end of the base frame. A mounting screw shaft projecting from the other end flange portion, and a clamping portion having a screw hole into which the mounting screw shaft portion is screwed and sandwiching the peripheral edge portion between the one end flange portion. The screw holes of the mounting screw shaft portion and the sandwiching portion are respectively provided with screw regions that engage with each other in the sandwiched state, and the mounting screw shaft portion and the sandwiching portion rotate relative to each other. Release the mesh with the threaded part facing the threaded part It is characterized in that the non-threaded region is provided continuously in the axial direction.

  According to this invention, the screw region of the mounting screw shaft portion and the clamping portion provided with the screw portions that mesh with each other in the clamping state, and the mounting screw shaft portion and the clamping portion rotate relatively. As a result, the screw-free area that releases the meshing with the other screw portion is provided continuously in the axial direction, so that each of the screw holes of the mounting screw shaft portion and the clamping portion is provided. By making the screw area and the non-screw area face each other, the engagement of the screw parts is released, and the clamping part is moved to a position corresponding to the back surface of the peripheral part of the opening (hereinafter simply referred to as “opening peripheral part”). Can be made. And in this state, by rotating the mounting screw shaft part and the clamping part relatively, it is possible to engage each other's screw part, thereby holding the opening peripheral part between the one end flange part. The clamping part can be fixed. At this time, since the clamping portion is fixed to the mounting screw shaft portion by meshing of the screw portion in each screw region, the clamping portion is moved to the opening peripheral portion side by the spiral of the screw portion at the time of fixing, and the clamping portion is moved to the opening peripheral portion. It can be properly pressed against the back.

  In addition, since the screw region and the screwless region are provided in the mounting screw shaft portion and the screw hole of the clamping portion, the screw region and the screwless region face each other when tightened excessively. Since the meshing is released, excessive tightening can be prevented, and the clamping portion can be firmly clamped to the peripheral edge of the opening together with the flange portion at one end in an appropriate state.

  That is, according to the present invention, the clamping part can be moved to an appropriate position all at once regardless of the length of the mounting screw shaft part, the work efficiency in the field can be improved, and the one end flange part and the clamping part Thus, the opening peripheral edge can be clamped with an appropriate force, whereby the frame body can be properly and firmly fixed to the opening peripheral edge.

  In the present invention, the screw-free region of the mounting screw shaft portion may extend to the tip in the axial direction, but the tip of the mounting screw shaft portion is screwed over the entire circumference. It is preferable that a portion is provided.

  With this configuration, since the tip of the mounting screw shaft portion is provided with a screw portion over the entire circumference, the tip portion is not affected by the relative positional relationship in the circumferential direction with the clamping portion. It engages with a screw part provided in the screw hole of the holding part. Therefore, it is possible to reliably prevent the holding portion from accidentally falling off the mounting screw shaft portion, and to effectively prevent deterioration of work efficiency due to the unexpected dropping.

  In this invention, for example, each of the sandwiching portion and the other end flange portion may be provided with a mark that can visually recognize that the opening peripheral portion such as the floor portion is properly sandwiched by the sandwiching portion. The shaft portion is provided with either a protrusion in the screw region or a recess fitted into the protrusion, and the clamping portion is provided with the other of the protrusion and the recess in the screw region of the screw hole, In the clamping state of the clamping part, it is preferable that these protrusions and the recesses are fitted.

  If comprised in this way, in the wearer to the opening peripheral part of a frame, the pinching state of a pinching part can be grasped by the click feeling by fitting of the above-mentioned projection and a crevice, and it is in the wearer's skill. Regardless, the screw portions of the attachment screw shaft portion and the clamping portion can be appropriately meshed with each other, whereby the frame body can be appropriately attached to the opening peripheral edge portion. In addition, loosening of the screw portions of the mounting screw shaft portion and the clamping portion can be prevented by fitting the protrusions and the recesses.

  In this invention, the range of the screw region on the peripheral surface of the mounting screw shaft and the clamping portion is not particularly limited, and for example, the screw region may be provided in a biased manner such as providing a screw region in a half region in the circumferential direction. However, it is preferable that the screw regions of the mounting screw shaft portion and the clamping portion are provided at point-symmetric positions around the shaft centers of the mounting screw shaft portion and the screw hole.

  According to this structure, the axial force due to the engagement of the screw portions acts in a balanced manner in the circumferential direction by tightening the mounting screw shaft portion and the clamping portion, and the floor is firmly placed between the one end flange portion and the clamping portion. The part can be clamped.

  In the present invention, the mounting screw shaft portion may be provided integrally with the other end flange portion, but the mounting screw shaft portion is detachably attached to the other end flange portion. It is preferable.

  If comprised in this way, both can be isolate | separated at the time of conveyance and storage, and what is necessary is just to attach both at the time of mounting | wearing of a frame, and the convenience improves.

  In this case, the mounting structure for the other end flange portion of the mounting screw shaft portion is not particularly limited. For example, the other end flange portion extends from the inner and outer edge portions to one side and is opposed to each other. And a locking flange portion extending in a direction approaching each other at the tip of each opposing wall portion, and the mounting screw shaft portion is rotated between the locking flange portions by rotating about the axis. It is preferable to have a head portion that can be switched between an insertion posture in which it can be inserted and an engagement posture that engages with each of the locking flange portions.

  If comprised in this way, this attachment screw shaft part can be engaged / disengaged with respect to an other end flange part only by rotating an attachment screw shaft part centering on an axial center, and it can work efficiently on the spot. it can. That is, since the head of the mounting screw shaft portion is configured to be switchable between the insertion posture and the engagement posture by rotating around the axis, the locking flange portion is set by setting the head to the insertion posture. The head can be engaged with both locking flanges by inserting the shaft and rotating the mounting screw shaft around the shaft center.

  According to the frame for an opening in a building according to the present invention, the clamping portion can be moved to an appropriate position all at once regardless of the length of the mounting screw shaft portion, and the work efficiency in the field can be improved. At the same time, the opening peripheral edge can be securely and firmly sandwiched between the one end flange portion and the sandwiching portion with an appropriate force, whereby the frame can be properly and firmly fixed to the opening peripheral edge.

It is the schematic which shows the whole frame which concerns on one Embodiment of this invention. It is the II-II sectional view taken on the line of FIG. It is a perspective view which shows an attachment deformed bolt. It is a top view of a mounting variant bolt. It is a side view of a mounting variant bolt. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is the VII-VII sectional view taken on the line of FIG. It is a perspective view which shows a clamping tool. It is a top view of a clamping tool. FIG. 10 is a sectional view taken along line XX in FIG. 9. It is explanatory drawing explaining the effect | action of the head of an attachment deformed bolt. It is explanatory drawing explaining attachment of an outer frame. It is a conceptual diagram which shows the positional relationship of the screw hole of an attachment irregularly shaped bolt and a clamping fixture. It is other embodiment of an attachment deformed bolt, Comprising: It is sectional drawing corresponding to FIG. It is a conceptual diagram which shows the positional relationship of the screw hole of the attachment deformed bolt which concerns on other embodiment, and a clamping fixture. It is explanatory drawing explaining attachment of the fixed unit containing the attachment unusually shaped bolt which concerns on other embodiment.

  Hereinafter, an embodiment according to the present invention will be described with reference to the drawings. In this embodiment, the outer frame attached to the periphery of the opening provided in the floor as an underfloor inspection port will be described. However, the position of the building in which the opening is provided is not limited to the floor, but the ceiling or wall. Further, the use of the opening, the name of the frame, and the like are not particularly limited. Therefore, as an application of the opening provided in the floor (ceiling or wall), it may be an opening for underfloor storage (ceiling storage, wall storage), and the inner frame is not fitted into the frame. It may be a simple frame.

  FIG. 1 is a schematic view showing an underfloor inspection port structure including an outer frame 4 of the present embodiment. 2 is a cross-sectional view taken along line II-II in FIG.

  This underfloor inspection port structure is installed in an opening 15 provided in the floor 1. The floor portion 1 includes a base material 11 supported by a support (not shown) on the foundation of a building, and a floor material 12 laminated on the base material 11.

  In the present embodiment, particle board is used as the base material 11, but as the base material 11, a wood material such as plywood or particle board, a hard fiber board, a medium fiber board, a high specific gravity fiber board, or the like. Wood fiberboard and combinations thereof can be used. Further, the shape and size of the opening 15 are not particularly limited, but in the present embodiment, a rectangular shape (specifically, a square having a side of 300 mm is set to such a size that the underfloor can be visually recognized. Shape).

  The opening 15 of the floor 1 is provided with a lid 13 that closes the opening 15. The lid 13 has a two-layer structure in which two plate members 13 a and 13 b are laminated, and the upper plate member 13 a is configured as a floor material similar to the floor material 12. The lid 13 is provided with a handle 13c that is gripped by the user when the lid 13 is opened and closed (see FIG. 1).

  Frame bodies 3 and 4 are attached to the outer peripheral edge of the lid 13 and the peripheral edge of the opening 15, respectively. Specifically, the frame body includes an inner frame 3 attached to the outer peripheral edge portion of the lid body 13 and an outer frame 4 attached to the peripheral edge portion of the opening 15 in the floor portion 1 (in the frame body of the present invention). And the inner frame 3 is fitted into the outer frame 4 so that the upper surface of the lid 13 and the upper surface of the floor portion 1 are substantially flush with each other.

  The inner frame 3 includes an inner frame main body 31 attached to the peripheral edge of the lid body 13 and a fixing member 32 for fixing the inner frame main body 31 to the lid body 13. The inner frame body 31 includes a corner member 33 fitted into a corner portion of the lid body 13 and a linear member 34 attached to an edge portion (an edge portion corresponding to one side of the lid body 13) extending between adjacent corner portions. In addition, corner members 33 are arranged and connected to both ends of each linear member 34 to form a frame shape. The fixing member 32 includes various screws such as a tapping screw and a drill screw, a nail, and the like, and fixes the inner frame main body 31 to the peripheral portion of the lid 13 at an appropriate position. In the present embodiment, a wood screw is used as the fixing member 32, and a plurality of screws are provided on each side of the inner frame main body 31.

  Specifically, as shown in FIG. 2, the linear member 34 of the inner frame body 31 includes an inner base frame 35 disposed along the side surface of the lid body 13, and the lid body 13 from the upper end of the inner base frame 35. The inner frame upper flange 36 extending inward and outward of the inner frame, and the inner frame lower flange 37 extending inward of the lid 13 from the lower end of the inner base frame 35.

  The inner base frame 35 is configured as a vertical wall portion along the side surface of the lid body 13, and has a bulging portion 35 a protruding outward on the outer side surface (side surface opposite to the lid body 13). The top of the bulging portion 35a is in contact with or substantially in contact with the inner surface of the outer frame 4 (specifically, the outer base frame 53), and is airtight while providing play between the inner and outer frames 3, 4. Can be secured.

  The inner frame upper collar part 36 extends to the inside of the lid body 13 and is superposed on the upper surface of the peripheral edge of the lid body 13, and the outer frame upper collar part 54, which will be described later, extends to the outside of the lid body 13. And an outer flange portion 36 b that is superposed on the upper surface of the floor portion 1. The inner flange portion 36 a is fitted with the peripheral edge portion of the lid 13 between the inner frame lower flange portion 37. The outer flange portion 36b is provided with a flat space in the lower portion in which the outer frame upper flange portion 54 can be accommodated, and the outer frame upper flange portion 54 is accommodated in the flat space to prevent the outer frame upper flange portion 54 from floating. It is supposed to suppress.

  The inner frame lower collar portion 37 includes a lower collar body 37a that is superposed on the lower surface of the peripheral edge of the lid body 13, and support ribs 37b that project downward from both inner and outer edges of the lower collar body 37a. The support ribs 37b come into contact with an outer frame lower flange 55 (described later) of the outer frame 4. In the present embodiment, two support ribs 37b are provided in each of the inside and outside, and a through hole 37c penetrating vertically is provided in the lower collar body 37a between the inside and outside support ribs 37b. The fixing member 32 is inserted into the through-hole 37 c, and the inner frame body 31 is fixed to the peripheral portion of the lid body 13 by screwing the fixing member 32 into the peripheral portion of the lid body 13 through the through-hole 37 c. Has been.

  As shown by a solid line in FIG. 1, the outer frame 4 includes an outer frame main body 5 attached to the peripheral edge of the opening 15 in the floor portion 1, and the outer frame main body 5 for fixing the outer frame main body 5 to the peripheral edge of the opening 15. And a fixed unit 6. The outer frame main body 5 includes a corner member 51 mounted at a corner of the peripheral portion of the opening 15 of the floor portion 1 and an edge extending between adjacent corners (periphery corresponding to one side of the opening 15). And a linear member 52 attached to each other, and corner members 51 are arranged and connected to both ends of each linear member 52 to form a frame shape. As shown in FIG. 2, the fixing unit 6 includes a mounting deformed bolt 7 (corresponding to a mounting screw shaft portion) detachably attached to the linear member 52, and a clamping fixture 8 (clipping) with the deformed bolt 7. And the outer frame 4 is fixed to the peripheral portion of the opening 15 by sandwiching the peripheral portion of the opening 15 in cooperation with the outer frame main body 5.

  Specifically, as shown in FIG. 2, the linear member 52 includes an outer base frame 53 (corresponding to a base frame), an outer frame upper collar part 54 (corresponding to one end flange part), and an outer frame lower collar part 55. (Corresponding to the other end flange portion).

  The outer base frame 53 is configured as a vertical wall portion along the inner peripheral surface of the opening portion 15, and is fitted into the opening portion 15 of the floor portion 1 together with a side wall portion (not shown) of the corner member 33. The height of the outer base frame 53 is not particularly limited, but in this embodiment, the height of the outer base frame 53 is set slightly shorter than the height of the inner peripheral surface of the opening 15 of the floor portion 1 and the lower end of the outer base frame 53 is open. The portion 15 is disposed at a position higher than the lower end of the inner peripheral surface.

  The outer frame upper flange 54 extends from the upper end of the outer base frame 53 toward the outside of the opening 15. The outer frame upper collar 54 is placed on the upper surface of the peripheral portion of the opening 15, and the outer frame 4 is attached to the opening 15 of the floor 1 by sandwiching the opening peripheral portion of the floor 1 together with the holding fixture 8. .

  The outer frame lower flange 55 extends from the lower end of the outer base frame 53 toward the inside of the opening 15, and supports the lid body 13 with the inner frame 3 by placing the inner frame 3 on the upper surface. .

  More specifically, the outer frame lower collar part 55 extends downward from both inner and outer side edges of the collar body part 55a and faces the collar body part 55a on which the support rib 37b of the inner frame lower collar part 37 is placed. A pair of opposing wall portions 55b and a locking collar portion 55c extending in a direction approaching each other at the lower end of each opposing wall portion 55b, and these extend along the peripheral edge portion of the opening 15. The opposing wall 55b provided on the outer side (inner side of the opening 15) of the opposing wall 55b is disposed so that the upper end overlaps with the inner side of the opening 15. In the facing wall portion 55b, the interval between the inner wall surfaces is set to a predetermined interval D2 (see FIG. 11), and a later-described head 71 of the mounting deformed bolt 7 can be disposed therebetween. The locking hook portions 55c are arranged with a predetermined distance D1 (see FIG. 11) between the tips, and the fixing unit 6 can be engaged and disengaged through the distance between the tips.

  The fixing unit 6 is for fixing the outer frame main body 5 to the opening 15 of the floor portion 1 as described above, and is appropriately disposed along the outer frame main body 5. In this embodiment, as shown in FIG. 1, two are arrange | positioned at right and left.

  As described above, the fixing unit 6 includes the mounting deformed bolt 7 and the clamping fixture 8, and the clamping fixture 8 and the outer frame upper collar portion when the clamping fixture 8 is screwed to the mounting deformed bolt 7. 54, and sandwiching the fixing member 7 with respect to the mounting deformed bolt 7 by releasing the above-mentioned screwing by rotating the mounting deformed bolt 7 and the holding fixture 8 relatively. 8 is configured to be switchable between a vertically movable state that can be vertically moved up and down. In the present embodiment, the clamping fixture 8 is rotated to switch between the clamping state and the lift-free state.

  FIG. 3 is a perspective view showing the mounting deformed bolt from different viewpoints, and FIG. 4 is a plan view of the bolt. 5 is a side view of the bolt, and FIGS. 6 and 7 are sectional views taken along lines VI-VI and VII-VII in FIG.

  The mounting variant bolt 7 includes a head 71 (corresponding to the head), a positioning flange portion 72 provided below the head 71 via a groove 74, and a shaft portion provided below the positioning flange portion 72. 73, and the head 71 is attached to the outer frame 4 by being engaged with the locking collar portion 55 c of the outer frame lower collar portion 55. The material of the mounting deformed bolt 7 is not particularly limited, and may be made of a metal such as steel, but in the present embodiment, it is an integrally molded product of synthetic resin such as polypropylene.

  The head 71 is rotated about the axis C1 so that the head 71 can be inserted between the locking collars 55c of the outer frame lower collar 55, and the engagement attitude that engages with each locking collar 55c. It can be switched to.

  Specifically, the head 71 is a flat columnar body having a deformed polygonal plan view shape in which a pair of sides positioned symmetrically about the axis C1 is set in parallel. More specifically, as clearly shown in FIG. 4, the head 71 has a point-symmetrical hexagonal plan view shape with the axis C1 as the center, and the lengths d1 to d1 of the vertical lines that are lowered toward the opposite sides. d3 (hereinafter referred to as “distance between sides”) is set so as to change in three stages of short, medium and long.

  The short side-to-side distance d1 is set to be equal to the distance D1 (see FIG. 11) between the locking collar portions 55c of the outer frame lower collar portion 55. On the other hand, the long side-to-side distance d3 is set to be longer than the interval D1 between the locking hook portions 55c, and in this embodiment, is set to be equal to the interval D2 between the opposing wall portions 55b of the outer frame lower flange portion 55. Has been. Further, the intermediate side distance d2 is set between the side distance d1 and the side distance d3.

  By setting the dimensions of the distances d1 to d3 between the sides of the head 71 as described above, the distance d1 between the sides is made to coincide with the distance D1 between the locking collars 55c (insertion posture, see FIG. 11A). The head 71 can be inserted between the opposing wall portions 55b through the engagement hook portions 55c. Then, by rotating the head 71 around the axis C1 with the head 71 positioned between the opposing wall portions 55b, the distance d3 between the sides coincides with the distance D2 between the opposing wall portions 55b (engagement posture, FIG. 11 (c)), the end portion of the head 71 can be engaged with each of the locking flange portions 55c, whereby the attachment deformed bolt 7 can be locked to the outer frame lower flange portion 55.

  The head 71 of this embodiment is provided with a plurality of hole portions 71a for stealing meat on the peripheral side, but the hole portions 71a for stealing meat can be omitted as appropriate.

  The positioning flange portion 72 interferes with the lower surface of the locking hook portion 55c to prevent further insertion when the head 71 is inserted between the locking hook portions 55c. The width in the direction that coincides with the distance d1 is set to be larger than the distance D1 between the locking collar portions 55c. Specifically, the positioning flange portion 72 is set in a circular shape in plan view as clearly shown in FIG. 4, and the diameter thereof is set to be larger than the interval D1 between the locking flange portions 55c. Therefore, as clearly shown in FIG. 2, in a state in which the attachment deformed bolt 7 is attached to the outer frame lower collar part 55, the locking collar part 55 c of the lower collar part 55 is disposed in the groove part 74.

  The shaft portion 73 includes a partial screw shaft portion 76 provided downward from the positioning flange portion 72 and having a male screw portion 761 (corresponding to a screw portion) engraved in a partial region in the circumferential direction, and the partial screw shaft portion 76. And an all screw shaft portion 77 in which a male screw portion 771 is engraved in the entire circumferential region. The male screw portions 761 and 771 provided on the screw shaft portions 76 and 77 are double-threaded screws in which various dimensions such as a valley diameter and an outer diameter are set to be the same, and the partial screw shaft portion 76 and the entire screw shaft portion. 77 is continuous. The leads of these male screw portions 761 and 771 are preferably set within a range of 2 mm to 8 mm from the viewpoint of sufficiently pressing the lower surface of the floor portion 1 with the clamping fixture 8 as described later. In the present embodiment, the leads of the male screw portions 761 and 771 are set to 4 mm.

  Specifically, in the circumferential direction, the partial screw shaft portion 76 includes a screw region 76a in which a male screw portion 761 is provided, and a height of a screw thread radially inward with respect to the outer diameter of the male screw portion 761. And a screwless area 76b that is not provided with a thread, and the relative positions of these areas 76a and 76b and the below-described screw area 85a and screwless area 85b of the clamping fixture 8 Depending on the relationship, the clamping state of the clamping fixture 8 can be switched between the lifting and lowering free state.

  Each of these regions 76a and 76b is provided at a point-symmetrical position with the axis C1 as the center, and in this embodiment, as clearly shown in FIG. Are provided alternately. Each of these regions 76a and 76b is provided continuously in the axial direction from the boundary portion between the partial screw shaft portion 76 and the entire screw shaft portion 77 to the lower side of the positioning flange portion 72 (head 71). The clamping fixture 8 is configured to be capable of moving up and down along the axial direction in the state of 8 lift free.

  In each screw region 76a (each of two screw regions 76a provided in the circumferential direction), as clearly shown in FIG. 7, a hemispherical concave portion is formed at the top of each screw thread of the male screw portion 761 in the central portion in the circumferential direction. 762 is provided. That is, the recesses 762 are arranged in the axial direction as shown in FIG. The concave portion 762 is a portion into which a later-described protrusion 852 provided in the screw region 85a of the holding fixture 8 is fitted. The operation of the recess 762 will be described in detail together with the description of the protrusion 852.

  In the present embodiment, a second recess 772 is provided in which the protrusion 852 is fitted to the male screw portion 771 of the entire screw shaft portion 77 rotated 90 degrees from the portion where the recess 762 is provided. (See FIGS. 3 and 5).

  In addition, each screw thread of the male screw part 761 in each screw region 76a is provided with a thread taper part 763 by gradually lowering the downstream side in the tightening direction of the mounting deformed bolt 7 (see arrow A in FIG. 7). In the present embodiment, as shown in FIG. 7, the inclined surface of the thread taper portion 763 coincides with the tangential direction of the boundary point between the screw region 76a and the screwless region 76b in a sectional view. The thread taper portion 763 is provided for guiding at the time of meshing, that is, for facilitating engagement between the male screw portion 761 and a female screw portion 851 described later.

  On the other hand, in the present embodiment, the screwless region 76b is formed in a state where the outer diameter of the male screw portion 761 is retracted in the radial direction by the height of the approximate screw thread. As clearly shown in FIG. 6, meat stealing holes 766 are provided at predetermined intervals in the axial direction. As described above, the meat stealing hole portions 766 are provided at predetermined intervals in the axial direction, thereby suppressing the strength reduction of the shaft portion 73 while suppressing the manufacturing cost. The meat stealing hole 766 can be omitted as appropriate, and in this case, the screwless region 76b is configured as a simple arcuate surface.

  The entire screw shaft portion 77 is provided at the lower end portion of the shaft portion 73 and is set to a short dimension with respect to the partial screw shaft portion 76. This all screw shaft part 77 is provided in order to prevent the clamping fixture 8 from falling off, and is set to one or more rounds. In addition, it is preferable that this all screw shaft part 77 is set to less than 5 rounds. Further, the screw tip portion 772 of the all screw shaft portion 77 is chamfered.

  Next, the clamping fixture 8 will be described.

  FIG. 8 is a perspective view showing the clamping fixture from different viewpoints, and FIG. 9 is a plan view of the clamping fixture. FIG. 10 is a sectional view taken along line XX of FIG.

  The clamping fixture 8 includes a fixture main body 81 that is engaged with and disengaged from the mounting deformed bolt 7, and a protruding pressing portion 82 that is erected upward at one end portion of the fixture main body 81 and presses the lower surface of the floor portion 1. And a reinforcing flange 83 for connecting the intermediate portion in the longitudinal direction of the fixture body 81 and the intermediate portion in the height direction of the protruding pressing portion 82 at both ends in the width direction, and these are integrally formed from a synthetic resin such as polypropylene. In addition, although this reinforcement flange 83 is comprised as a triangular plate-shaped body in this embodiment, it does not specifically limit about a specific structure, and can be abbreviate | omitted suitably.

  The fixture main body 81 is formed in an elongated block shape, and a screw hole 85 penetrating in the vertical direction is provided at an end opposite to the end where the protruding pressing portion 82 is erected. The screw hole 85 is inserted into the shaft portion 73 of the mounting deformed bolt 7, and as described above, the shaft portion (specifically, the partial screw shaft portion) depends on the relative positional relationship between the shaft portion 73 and the screw hole 85. 76) can be switched between the clamping state engaged with the male threaded portion 761 and the lift-free state in which the engagement is released.

  That is, on the inner peripheral surface of the screw hole 85, in the circumferential direction, a screw region 85a in which a female screw portion 851 with which the male screw portions 761 and 771 of the shaft portion 73 of the mounting deformed bolt 7 are engaged is engraved, and this There is provided a non-threaded region 85b in which a thread groove is not formed by retreating more than the depth of the thread groove on the radially outer side with respect to the inner diameter of the female thread portion 851.

  Each of these regions 85a and 85b is provided at a point-symmetrical position about the axis C2 as clearly shown in FIG. 9, and in the present embodiment, a quarter in the circumferential direction as clearly shown in FIG. They are provided alternately (90 degrees as the central angle). Each of these regions 85 a and 85 b is provided continuously in the axial direction over the entire length of the screw hole 85.

  Specifically, as shown in FIG. 9, in the plan view, assuming an XY axis centered on the axis C2 in the screw hole 85, the first quadrant (lower left of the axis C2 in FIG. 9), the first An unthreaded region 85b is arranged in the third quadrant (upper right of the axis C2 in FIG. 9), and in the second quadrant (lower right of the axis C2 in FIG. 9) and fourth quadrant (upper left of the axis C2 in FIG. 9). A screw region 85a is provided. Each screw region 85a is completely formed in the screw region 76a of the partial screw shaft portion 76 when the longitudinal direction (X-axis direction) of the fixture main body 81 coincides with the direction perpendicular to the inner surface of the opening 15. The female screw portion 851 of the screw hole 85 and the male screw portion 761 of the partial screw shaft portion 76 are engaged with each other (a sandwiched state). Then, by rotating the clamping fixture 8 from this state by 90 degrees relative to the mounting deformed bolt 7, each screw region 85a is completely opposed to the non-screw region 76b of the partial screw shaft portion 76, The meshing state between the female screw portion 851 of the screw hole 85 and the male screw portion 761 of the partial screw shaft portion 76 is released (up and down free state).

  Each screw region 85a (each of the two screw regions 85a provided in the circumferential direction) has a hemispherical shape at the bottom of each screw groove of the female screw portion 851 at the center in the circumferential direction, as clearly shown in FIG. A protrusion 852 is provided. That is, the protrusions 852 are arranged in a line along the axial direction as shown in FIG. As described above, the protrusion 852 is a portion into which the concave portion 762 provided in the screw region 76a of the mounting variant bolt 7 is fitted.

  Since these protrusions 852 and the recesses 762 into which the protrusions 852 are fitted are respectively provided in the center portions in the circumferential direction of the regions 76a and 86a, the protrusions 852 and the recesses 762 are fitted. As a result, the screw region 85a of the screw hole 85 and the screw region 76a of the partial screw shaft portion 76 are completely opposed to each other, and the screw portions 851, 761 provided in both screw regions 85a, 76a are engaged with each other. 7 and the clamping fixture 8 can be engaged. In addition, when the protrusions 852 and the recesses 762 are fitted, a click feeling can be obtained, so that regardless of the skill of the wearer of the outer frame 4, the mounting deformed bolt 7 and the clamping fixture 8 Even when the relative positional relationship is not visually recognized, the optimum engagement state of both can be recognized, and the outer frame 4 can be appropriately attached to the peripheral edge portion of the opening 15 of the floor portion 1. Further, the fitting between the projecting portion 852 and the recessed portion 762 can effectively prevent loosening of engagement between the male screw portion 761 of the mounting variant bolt 7 and the female screw portion 851 of the clamping fixture 8.

  On the other hand, in the present embodiment, the non-threaded region 85b is formed in a state where it is retracted by the depth of the substantially thread groove on the radially outer side with respect to the inner diameter of the female screw portion 851. Therefore, in the present embodiment, the screwless region 85b has an inner diameter set larger than the inner diameter of the screw region 85a, and is configured as an arc smooth surface centered on the axis C2.

  In addition, as shown in FIG.8 (b), the hole part 81a for meat stealing is provided in the bottom part of the fixing tool main body 81, and the weight reduction is achieved collectively.

  The protruding pressing portion 82 is a columnar body that protrudes from the upper surface of one end of the fixture main body 81. The protruding pressing portion 82 includes a protruding boss portion 821, a dome-shaped pressing portion 822 that bulges at the upper end of the protruding boss portion 821, and the axial direction (up and down) of the protruding boss portion 821 from above the dome-shaped pressing portion 822. And a shaft hole 823 for stealing meat extending in the direction). The meat stealing shaft hole 823 is arranged at a point-symmetrical position around the axial center of the protruding boss portion 821, and is provided through the protruding boss portion 821 and the dome-shaped pressing portion 822 vertically. For this reason, the projecting boss portion 821 and the dome-shaped pressing portion 822 are formed in a rectangular tube shape having a rib portion extending radially to the center of each side in a plan view as a whole.

  The dome-shaped pressing portion 822 protrudes in a spherical shape upward, thereby reducing the sliding contact resistance with the lower surface of the floor portion 1 and facilitating the later-described rotational operation of the clamping fixture 8. Yes.

  The outer frame 4 configured as described above is fixed to the periphery of the opening 15 in the floor portion 1 by the following method.

  First, the outer frame main body 5 of the outer frame 4 is arranged in the opening 15 of the floor portion 1. Specifically, the outer base frame 53 of the outer frame body 5 is fitted into the opening 15 of the floor portion 1 together with the side wall portion of the corner member 51, and the outer frame upper collar portion 54 is placed on the peripheral portion of the opening 15. .

  Next, the fixing unit 6 is attached to the outer frame main body 5. Specifically, the clamping fixture 8 is first assembled to the mounting variant bolt 7 of the fixing unit 6. This assembly is performed by screwing all the screw shaft portions 77 in the shaft portion 73 of the mounting deformed bolt 7 into the screw holes 85 of the clamping fixture 8. As described above, the shaft portion 73 of the mounting deformed bolt 7 has the entire screw shaft portion 77, and when the mounting deformed bolt 7 and the clamping fixture 8 are assembled, the entire screw shaft portion 77 is screwed into the screw hole of the clamping fixture 8. Therefore, it is possible to reliably prevent the accidental drop-off of the holding fixture 8 from the deformed bolt 7 and to effectively prevent the work efficiency from being deteriorated due to the unexpected drop.

  Then, the modified deformed bolt 7 assembled with the clamping fixture 8 is attached to the outer frame lower flange portion 55 of the outer frame main body 5. Specifically, as shown in FIG. 11A, first, the posture in which the distance d1 between the short sides of the head 71 of the mounting variant bolt 7 is made to coincide with the distance D1 of the locking collar portion 55c of the outer frame lower collar portion 55. In the (insertion posture), the head 71 is opposed to the gap between the locking hook portions 55c (see FIG. 12A). In this state, the mounting deformed bolt 7 is lifted upward, and the head 71 is inserted into the gap between the locking hook portions 55c and disposed between the opposing wall portions 55b.

  Subsequently, the head 71 is rotated counterclockwise (see FIG. 11B). When the head 71 is rotated until the counterclockwise rotation is disabled, the distance d3 between the sides of the head 71 coincides with the distance D2 between the opposing wall portions 55b (see FIG. 11C). . In this state, the distance d3 between the sides of the head 71 is set to be larger than the distance D1 between the locking hooks 55c, so that the head 71 is engaged with the locking hooks 55c on both sides ( (Refer FIG.12 (b)). In this way, the fixing unit 6 is attached to the outer frame main body 5.

  As shown in FIG. 1, the outer frame 4 of the present embodiment is provided with two fixing units 6 on the left and right, so that the above mounting operation is repeated so that each fixing unit 6 is attached to the outer frame body 5. Install.

  The outer frame body 5 of the fixed unit 6 may be attached before the opening 15 of the floor portion 1 of the outer frame 4 is attached. In this case, the outer frame 4 to which the fixing unit 6 is attached at an appropriate position is attached to the opening 15 of the floor 1.

  As described above, the outer frame 4 of the present embodiment includes the outer frame main body 5 and the fixing unit 6 that can be attached to and detached from the outer frame main body. Since 6 can be separated, it is not bulky, can be prevented from being damaged by unexpected contact, and convenience can be improved.

  Further, by appropriately setting the shape of the head 71 of the mounting deformed bolt 7 as described above, it is possible to insert between the locking flange portions 55c only by rotating the mounting deformed bolt 7 about the axis C1. And the engagement posture to engage with the locking hook 55c, and the work in the field can be performed efficiently.

  Next, the clamping fixture 8 is raised and pressed against the lower surface of the floor portion 1. Specifically, the clamping fixture 8 is first adjusted by rotating the clamping fixture 8 to adjust the relative positional relationship between the mounting variant bolt 7 and the clamping fixture 8.

  In the state of FIG. 12B, the screw region 76a of the mounting variant bolt 7 and the screw region 85a of the clamping fixture 8 are in mesh with the screw portions 761 and 851 of the screw regions 76a and 85a (FIG. 13). (See (b).) From this state, the clamping fixture 8 is rotated 90 degrees in the direction of the arrow (clockwise) shown in FIGS. As described above, the screw regions 76a and 85a are opposed to the corresponding screwless regions 85b and 76b. In this state, the screw region 76a of the mounting deformed bolt 7 faces the screwless region 85b of the clamping fixture 8, and the screw region 85a of the clamping fixture 8 faces the screwless region 76b of the mounting variant bolt 7, so that each screw portion The meshing state of 761 and 851 is released, and thereby the clamping fixture 8 is brought into a lifting / lowering free state that can be lifted up and down.

  The clamping fixture 8 is lifted along the shaft 73 of the mounting deformed bolt 7 at a stretch in a state where the clamping fixture 8 is free to move up and down, and the top of the dome-shaped pressing portion 822 is disposed at a position corresponding to the lower surface of the floor portion 1. To do. In this state, when the clamping fixture 8 is rotated counterclockwise (see the arrow in FIG. 13A), the mounting deformed bolt 7 and the screw portions 761, 851 of the clamping fixture 8 are engaged with each other, and the screw portions 761 are engaged. , 851 while the clamping fixture 8 is raised, the opening peripheral edge of the floor portion 1 is clamped between the dome-shaped pressing portion 822 and the outer frame upper collar portion 54 (see FIG. 12C). .

  Then, when the screw region 76a of the mounting deformed bolt 7 is completely opposed to the screw region 85a of the holding fixture 8 (see FIG. 13B), the protrusion 852 of the holding fixture 8 is a recess of the mounting deformed bolt 7. A click feeling can be obtained by fitting to 762. By obtaining this click feeling, the opening peripheral edge portion of the floor portion 1 can be securely and firmly sandwiched between the clamping fixture 8 and the outer frame lower collar portion 55 of the outer frame body 5. At this time, the holding fixture 8 (specifically, the fixture main body 81) has a posture in which the longitudinal direction thereof coincides (or substantially coincides) with the normal direction of the corresponding inner peripheral surface of the opening 15.

  By repeating this for each fixing unit 6, the outer frame 4 can be stably fixed to the opening peripheral edge of the floor portion 1.

  That is, according to the outer frame 4 of the present embodiment, the screw holes 761 and 851 that mesh with each other in the clamping state of the floor portion 1 by the clamping fixture 8 are respectively provided in the mounting deformed bolts 7 and the screw holes 85 of the clamping fixture 8. The provided screw regions 76a and 85a, the mounting deformed bolt 7 and the clamping fixture 8 are relatively rotated to face the other screw portions 761 and 851, and the meshing with the screw portions 761 and 851 is released. Since the screwless regions 76b and 85b are continuously provided in the axial direction, the screw regions 76a and 85a and the screwless regions 85b and 76b of the mounting deformed bolt 7 and the clamping fixture 8 are opposed to each other. It is possible to release the meshing of the screw portions 761 and 851 and raise the clamping fixture 8 to a position corresponding to the lower surface of the floor portion 1 at a stretch. In this state, by rotating the clamping fixture 8 relative to the mounting deformed bolt 7, the screw portions 851 and 761 can be engaged with each other. The clamping fixture 8 can be fixed in a state where the floor portion 1 is clamped.

  Therefore, according to the outer frame 4 of the present embodiment, it is not necessary to perform only the rotation of the mounting screw to raise the fixture as in the conventional outer frame, and the length of the shaft portion 73 of the mounting deformed bolt 7 is reduced. Regardless, it is possible to raise the clamping fixture 8 to an appropriate position at a stretch, and work efficiency can be improved.

  At this time, since the clamping fixture 8 is fixed to the mounting deformed bolt 7 by the engagement of the screw portions 761 and 851 in the screw regions 76a and 85a, the clamping fixture 8 is fixed to the screw portions 761 during relative rotation. Ascending by the spiral of 851, the clamping fixture 8 can be properly pressed against the lower surface of the floor portion 1.

  In addition, since the threaded regions 76a and 85a and the screwless regions 76b and 85b are provided in the mounting deformed bolt 7 and the clamping fixture 8, respectively, the screw regions 76a and 85a and the screwless are not tightened. Since the regions 76b and 85b face each other and the meshing between the screw portions 761 and 851 is released, excessive tightening can be prevented, and the sandwiching fixture 8 together with the outer frame upper flange portion 54 is properly fitted to the floor portion 1 Can be firmly held in a stable state.

  The outer frame 4 described above is an embodiment of a frame for a floor opening according to the present invention, and its specific configuration and the like can be changed as appropriate without departing from the spirit of the present invention. . Hereinafter, the modification is demonstrated.

  (1) In the above embodiment, the screw regions 76a and 85a and the screwless regions 76b and 85b of the mounting deformed bolt 7 and the clamping fixture 8 are each 1/4 in the circumferential direction (90 degrees at the central angle). Although it is provided alternately, if the meshing state of the screw portions 761 and 851 of each screw region 76a and 85a and the release state thereof can be switched, the range in the circumferential direction is not particularly limited. Absent.

  Therefore, for example, with respect to the mounting deformed bolt 7 of the above embodiment, the engagement position may be changed by rotating the shaft portion 73 by 45 degrees counterclockwise with respect to the head 71 (see FIG. 14).

  By changing the meshing position in this way, the following effects can be obtained when the outer frame 4 is attached. The mounting variant bolt 107 according to the other embodiment has the same configuration except that the screw region and the screw-free region are displaced 45 degrees from the mounting variant bolt 7 according to the above embodiment. Therefore, the same reference numerals are assigned to the same components, and the description thereof is omitted.

  That is, as in the above embodiment, the outer frame main body 5 to which the fixing unit 106 is attached is disposed in the opening 15 of the floor portion 1. At this time, in the above embodiment, the clamping fixture 8 is screwed into a position corresponding to the partial screw shaft portion 76 of the mounting variant bolt 7, but for example, as schematically shown in FIG. It may be screwed up to a position corresponding to the screw shaft portion 77. At this time, as shown in FIG. 15, if the projecting portion 852 of the clamping fixture 8 is fitted in the second recess 773 of the entire screw shaft portion 77, the mounting deformed bolt 107 of the clamping fixture 8. It is possible to effectively prevent accidental drop-out from.

  In the state of FIG. 16A, the second projecting portion 773 is fitted into the recess 852 of the clamping fixture 8 while the entire threaded shaft portion 77 of the mounting deformed bolt 107 and the screw hole 85 of the clamping fixture 8 are engaged with each other. It is in a state (see FIG. 15). From this state, the clamping fixture 8 is rotated in the direction of the arrow shown in FIG. 16A, so that the screw regions 76a and 85a are opposed to the corresponding screwless regions 85b and 76b. In this state, the screw region 76a of the mounting deformed bolt 107 faces the screwless region 85b of the clamping fixture 8, and the screw region 85a of the clamping fixture 8 faces the screwless region 76b of the mounting variant bolt 107, so that The meshing state of 761, 851 is released, and thereby the clamping fixture 8 is in a vertically free state that can be vertically moved up and down (see FIG. 16B).

  In the state where the clamping fixture 8 is free to move up and down, as shown in FIG. 16C, the clamping fixture 8 is lifted along the shaft portion 73 of the mounting deformed bolt 107 at a stretch, and the top of the dome-shaped pressing portion 822 is moved upward. It arrange | positions in the position contact | abutted to the lower surface of the floor part 1. FIG. In the fixing unit 106 according to another embodiment, the shaft portion 73 is rotated and displaced 45 degrees counterclockwise with respect to the head 71 to change the meshing position, whereby the holding fixture 8 can be lifted and lowered in a free state. The clamping fixture 8 can be disposed at a position that interferes with the peripheral edge of the opening of the floor portion 1 in plan view (see FIG. 16C). For this reason, since the top part of the dome-shaped press part 822 will contact | abut the lower surface of the floor part 1 if the clamping fixture 8 is raised in the raising / lowering free state, it will bother about the raising position of the clamping fixture 8 of the floor part 1. It is not necessary to check whether the position corresponds to the lower surface, and work efficiency is further improved.

  Then, when the clamping fixture 8 is rotated in the direction of the arrow in FIG. 16C in this contact state, the mounting deformed bolt 107 and the screw portions 761, 851 of the clamping fixture 8 are engaged with each other, and the screw portions 761, The opening periphery of the floor portion 1 is sandwiched between the dome-shaped pressing portion 822 and the outer frame upper collar portion 54 while the clamping fixture 8 is raised according to the spiral of 851.

  Then, when the screw region 76a of the mounting deformed bolt 107 is completely opposed to the screw region 85a of the holding fixture 8, the protrusion 852 of the holding fixture 8 is fitted into the recess 762 of the mounting deformed bolt 107, and the click feeling Can be obtained. At this time, the clamping fixture 8 (specifically, the fixture main body 81) has a posture in which the longitudinal direction is inclined by 45 degrees with respect to the normal line of the corresponding inner peripheral surface of the opening 15.

  Further, instead of the above configuration, for example, in the above embodiment, the screw region 75a of the mounting variant bolt 7 may be set to 45 degrees by reducing the central angle, and conversely, the screw of the clamping fixture 8 For the screw region 85a of the hole 85, the central angle may be reduced and set to 45 degrees or the like. In this case, the region where the screw portions 761 and 851 are engaged with each other is reduced. In this case, however, the holding fixture 8 can be lifted and lowered in a free state. It can arrange | position in the position which interferes with a part.

  (2) In the above-described embodiment, the screwless regions 76b and 85b of the mounting variant bolt 7 and the clamping fixture 8 are each configured as an arcuate peripheral surface, but are opposed to the screw regions 76a and 85a. As long as interference with the screw portions 761 and 861 can be avoided, the specific shape is not particularly limited. Therefore, for example, these screwless regions 76b and 85b may be configured as a plane.

  (3) In the above embodiment, the mounting variant bolt 7 includes the partial screw shaft portion 76 and the full screw shaft portion 77, but the full screw shaft portion 77 may be omitted. However, it is preferable to provide the entire screw shaft portion 77 from the viewpoint of preventing the accidental dropping of the clamping fixture 8 as described above.

  In addition, a male screw portion 761 is engraved between the partial screw shaft portion 76 and the head 71 between the partial screw shaft portion 76 and the positioning flange portion 72 or between the partial screw shaft portion 76 and the head 71 where the positioning flange portion 72 is omitted. It is good also as what does not provide a neck part. For example, unlike the present embodiment, when the thread portion of the mounting screw shaft portion is configured by cutting or the like, the manufacturing cost can be suppressed by setting the neck portion in consideration of the thickness of the floor portion 1.

  (4) In the above embodiment, the clamping fixture 8 is switched between the clamping state and the lift-free state by rotating the clamping fixture 8, but the switching is performed by rotating the mounting screw shaft. It may be a thing.

  (5) In the above embodiment, the distance d1 between the short sides in the head 71 of the mounting variant bolt 7 is set to be equal to the distance D1 between the locking flange portions 55c, but may be set smaller than this, For example, it may be configured to be equivalent to the diameter of the shaft portion 73.

  (6) In the above-described embodiment, the recesses 762 and the protrusions 852 provided in the screw regions 76a and 85a are provided in the center in the circumferential direction of the screw regions 76a and 85a. As long as the part fits when the male threaded part 761 of the mounting variant bolt 7 and the female threaded part 851 of the clamping fixture 8 are in a meshed state, the specific position is not particularly limited.

  However, as in this embodiment, each screw is positioned so that the screw region 76a of the mounting variant bolt 7 and the screw region 85a of the clamping fixture 8 are completely opposed to each other. It is preferable from the viewpoint of sure engagement of the screw portions 761 and 851.

  (7) In the above embodiment, the dome-shaped pressing portion 822 protrudes in a dome shape, but it is not necessary to provide the pressing portion separately from the protruding boss portion 821, and even when it is provided, the shape is a dome shape. It is not limited to. For example, a cylindrical shape whose outer shape is set smaller than the protruding boss 821 may be used.

1 Floor 4 Outer frame (equivalent to a frame)
7 Mounting deformed bolt (equivalent to mounting screw shaft)
8 Clamping fixture (equivalent to clamping part)
15 Opening 53 Outer base frame (equivalent to base frame)
54 Outer frame upper collar (equivalent to one end flange)
55 Outer frame lower flange (equivalent to flange on the other end)
55b Opposite wall portion 55c Locking collar portion 71 Head 76 Partial screw shaft portion 76a Screw region 76b No screw region 77 Full screw shaft portion 85 Screw hole 85a Screw region 85b No screw region 761 Male screw portion (screw portion of mounting screw shaft portion) Equivalent to
762 Concave portion 851 Female screw portion (corresponding to the screw portion of the clamping portion)
852 Protrusion

Claims (6)

In the frame for the opening that is attached to the opening provided in the building,
A base frame disposed along an inner peripheral surface of the opening; an end flange portion provided at one end of the base frame and placed on a peripheral surface of the opening; and the other end of the base frame The other end flange portion provided in the portion, a mounting screw shaft portion protruding from the other end flange portion, and a screw hole into which the mounting screw shaft portion is screwed, and the one end flange portion between A clamping part for clamping the peripheral edge part,
The screw holes of the mounting screw shaft portion and the clamping portion are respectively provided with screw regions that mesh with each other in the clamping state, and the other screw is rotated by the relative rotation of the mounting screw shaft portion and the clamping portion. A frame for an opening in a building, wherein a non-threaded region that releases the meshing with the threaded portion is provided continuously in the axial direction.   The frame for an opening in a building according to claim 1, wherein the tip of the mounting screw shaft is provided with a thread over the entire circumference.   The mounting screw shaft portion is provided with either one of a protrusion in the screw region and a recess that fits into the protrusion, and the holding portion has the other of the protrusion and the recess in the screw region of the screw hole. The frame for an opening in a building according to claim 1 or 2, wherein the protrusion and the recess are fitted in the clamping state of the clamping part.   The screw regions of the mounting screw shaft portion and the clamping portion are provided at point-symmetrical positions around the shaft centers of the mounting screw shaft portion and the screw hole, respectively. The frame for the opening part in the building of any one of Claims.   The frame for an opening in a building according to any one of claims 1 to 4, wherein the mounting screw shaft portion is detachably attached to the other end flange portion. The other end flange portion has a pair of opposed wall portions that extend from the inner and outer edge portions to one side and face each other, and a locking flange portion that extends in a direction close to each other at the tip end portion of each opposed wall portion. And
The mounting screw shaft is rotated about an axis so that the head can be switched between an insertion posture capable of being inserted between the locking flange portions and an engagement posture engaging with the locking flange portions. The frame for an opening in a building according to claim 5, characterized by comprising:

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