Jamb and jamb installation method

Abstract

To provide a jamb with a fitting structure of throwaway frames which can improve workability and working efficiency.SOLUTION: A jamb comprises: a head jamb arranged at an upper part; two door jambs 12a, 12b arranged on both sides thereof; anchor members 121 provided at sides facing respective opening parts of the door jambs 12a, 12b and used for fixing the jamb to the opening parts; and throwaway frames 13 removed upon installing the jamb and having fitting parts 132 fitted to the respective anchor members 121 of the door jambs 12a, 12b directly or via other members in both end parts thereof.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a jamb to be installed in an opening and a method for installing the jamb. [Background technology]

[0002] 2. Description of the Related Art At openings formed in walls or the like, fitting frames are provided in order to mount an opening / closing body such as a door, or to improve the design even when no opening / closing body is provided. Most door and window frames are four-sided, with top and bottom frames and vertical frames on both sides, but three-sided frames with no bottom frame are also used. Since a three-sided jamb does not have a bottom frame, it is an unstable structure before being installed in the main body (opening). Therefore, for convenience during transportation, etc., a temporary frame is used to structurally stabilize the three-sided jamb. The temporary frame is a kind of temporary bottom frame that is attached to the three-sided jamb during transportation, etc., and is removed when it is installed. Patent Document 1 discloses a technique relating to a waste frame used in such a three-sided jamb. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-120508 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional three-sided jamb, as shown in Fig. 8, it was necessary to provide base material 300 for attaching the disposable jamb 200 to the vertical frames 12a, 12b on both sides, and this required the formation of base material 300, which is a component only for attaching the disposable jamb 200, and welding of base material 300 to the vertical frames 12a, 12b, etc. Also, since the disposable jamb 200 is screwed to base material 300 from the bottom side, it was not possible to remove the disposable jamb 200 after the three-sided jamb was attached (installed in the opening), and it was necessary to remove the disposable jamb 200 beforehand before attaching the three-sided jamb (i.e., installation work was required in an unstable state). These points have the effect of reducing workability and work efficiency.

[0005] In view of the above, an object of the present invention is to provide a three-sided frame having a waste frame mounting structure that can improve workability and work efficiency. [Means for solving the problem]

[0006] (Configuration 1) A three-sided jamb to be installed in an opening, the three-sided jamb having an upper frame arranged at the top, two vertical frames arranged on both sides, anchor members provided on the sides of each of the two vertical frames facing the opening and used to fix the three-sided jamb to the opening, and a temporary jamb that is removed when the three-sided jamb is installed, the temporary jamb having attachment portions at both ends that are attached directly or via other members to the anchor members of each of the two vertical frames; It has a three-sided frame.

[0007] (Configuration 2) The three-sided frame described in configuration 1, having a posture change portion that changes the posture of the mounting portion.

[0008] (Configuration 3) The three-sided frame described in configuration 2, wherein the throw-away frame has a bridging portion that spans between the two vertical frames, the mounting portions are erected at both ends of the bridging portion, and the posture-changing portion is formed by forming a portion at the base portion of the erect mounting portions where the cross-sectional area is reduced.

[0009] (Configuration 4) The three-sided frame described in configuration 3, wherein the mounting portion is a plate-like member, and the width of the plate is narrowed at the base portion, thereby forming the posture changing portion.

[0010] (Configuration 5) A frame as described in any one of configurations 1 to 4, wherein the mounting portion has a plurality of screw holes formed therein for screwing to the anchor member.

[0011] (Configuration 6) The three-sided frame described in configuration 4, wherein the throw-away frame including the bridge portion, the mounting portion, and the posture change portion is integrally formed.

[0012] (Configuration 7) A three-sided frame as described in any one of configurations 1 to 6, wherein the discarded frame is attached from the front side or rear side of the vertical frame.

[0013] (Configuration 8) The three-sided frame according to any one of configurations 1 to 7, wherein the mounting portion is attached to the anchor member in the depth direction of the opening by a removable mounting member.

[0014] (Configuration 9) The three-sided frame described in configuration 8, further comprising a receiving member facing the mounting portion in the depth direction of the opening and fixed to the anchor member, the mounting portion being attached to the receiving member.

[0015] (Configuration 10) The three-sided frame described in configuration 8, wherein the anchor member has a surface that faces the mounting portion in the depth direction of the opening, and the mounting portion is attached to the facing surface.

[0016] (Configuration 11) A three-sided frame as described in any one of configurations 1 to 10, wherein the discarded frame has a bridging portion that spans between the two vertical frames, and the bridging portion has receiving recesses that respectively receive the two vertical frames, and an inner placement portion that is arranged between the two vertical frames.

[0017] (Configuration 12) 12. The three-sided frame of any one of configurations 8 to 11, wherein the sacrificial frame including the bridging portion and the mounting portion is integrally formed.

[0018] (Configuration 13) A method for installing a jamb as described in any one of configurations 8 to 12, comprising the steps of: installing the jamb to which the discarded frame is attached in the opening; and removing the discarded frame after the jamb is installed. Effect of the Invention

[0019] According to the present invention, it is possible to provide a three-sided jamb having a waste frame mounting structure that can improve workability and work efficiency. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a schematic diagram showing an installation state of a three-sided jamb according to an embodiment of the present invention. [Diagram 2] FIG. 1 shows a throwaway frame according to the first embodiment of the present invention. [Diagram 3] FIG. 1 is a diagram showing an attached state of a throwaway frame in the first embodiment. [Figure 4] FIG. 13 is a diagram showing another example of the attachment state of the throwaway frame of the first embodiment. [Diagram 5] FIG. 13 is a diagram showing a throwaway frame according to a second embodiment of the present invention. [Figure 6] FIG. 13 is a diagram showing the attachment state of the throwaway frame in the second embodiment. [Figure 7] FIG. 13 is a diagram showing an attachment state of another example of the throwaway frame of the embodiment; [Figure 8] A diagram showing the conventional installation of a discarded frame [Figure 9] A diagram showing the conventional installation of a three-sided door frame DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Note that the following embodiment is one form for embodying the present invention, and is not intended to limit the scope of the present invention.

[0022] (Embodiment 1) FIG. 1 is a schematic diagram (front view) showing the installed state of a three-sided jamb of the first embodiment. The jamb 1 of this embodiment is a jamb (door frame) that is fixed to a body (opening) in order to install a door 2, which is an opening and closing body, in an opening A formed in a wall surface. The discarded frame is removed when the jamb is installed, and therefore does not exist in Fig. 1, which shows the installed state of the jamb. In the following, the direction along the width of the opening (the left-right direction in FIG. 1) will be simply referred to as the "width direction," and the direction in which the opening enters and exits (the direction perpendicular to the paper surface in FIG. 1) will be simply referred to as the "depth direction." The up-down direction (or height direction) is the up-down direction in FIG. 1.

[0023] The three-sided frame 1 of this embodiment is: An upper frame 11 arranged at the top, Two vertical frames 12a and 12b are arranged on both sides. Anchor members 121 (see FIG. 3) are provided on the sides of the two vertical frames 12a and 12b facing the opening (wall surface) and are used to fix the frame 1 to the opening A; a temporary frame 13 having mounting portions 132 at both ends to be attached to the anchor members 121 of the two vertical frames 12a and 12b; It is equipped with:

[0024] As the upper frame 11, vertical frames 12a, 12b, and anchor member 121 have traditionally been used as three-sided frames, detailed explanations will be omitted here (the present invention can be applied to any three-sided frame in which anchor members are used). As shown in Fig. 9 (a diagram showing the installation state of a conventional three-sided jamb (door frame)), the anchor member is a member that is welded to reinforcing bars 431 on the skeleton side in order to fix the three-sided jamb (vertical frames 401a, 401b) to the skeleton (opening), and is a plate-shaped member that is fixed (welded) to the vertical frame on the "side of the vertical frame facing the opening (wall surface)". Usually, multiple anchor members are provided in the height direction of the vertical frame, and each is fixed (welded) to reinforcing bars 431 on the skeleton side.

[0025] 2A to 2D are diagrams showing the throw-away frame 13 of this embodiment, with FIG. 1(a) being a front view, FIG. 1(b) being a side view, FIG. 1(c) being a top view, and FIG. 1(d) being a bottom view. The throw-away frame 13 of this embodiment has a bridging portion 131 that spans between the two vertical frames 12a, 12b, mounting portions 132 that stand on both ends of the bridging portion 131, and a position changing portion 133 that is formed at the base portion of the mounting portion 132. The throw-away frame 13 of this embodiment is a member formed by cutting and bending a steel plate (shear press processing), and the bridging portion 131, mounting portion 132, and position changing portion 133 are integrally formed.

[0026] The bridging portion 131 has a length (widthwise length) that spans between the two vertical frames 12a, 12b so as to function as a "temporary lower frame." Also, in order to obtain the strength required for the "temporary lower frame," the cross section perpendicular to the longitudinal direction (widthwise direction) is formed into a substantially U-shape (see FIG. 1(b)). In this embodiment, the bridging portion 131 is formed by shear pressing a steel plate to have a roughly U-shaped cross section (integrally formed with the mounting portion, etc.), but the present invention is not limited to this, and any member having the strength required to stabilize the three-sided frame (for example, one formed using multiple rod-shaped members) may be used.

[0027] The mounting portion 132 of this embodiment is a plate-shaped member, and has a plurality of screw holes H formed in the height direction for screwing to the anchor member 121. The base portion of the mounting portion 132 has a small width (depth dimension) of the plate, i.e., a portion with a reduced cross-sectional area is formed at the base portion of the mounting portion, thereby forming a posture changing portion 133. The position changing portion 133 is intended to facilitate changing the position of the mounting portion 132, for example by twisting the mounting portion 132 relative to the bridge portion 131. In this embodiment, the mounting portion 132 is a plate-like member, and a rectangular shape is used as an example, but the present invention is not limited to this, and the mounting portion 132 may have any shape as long as it allows the bridging portion 131 to be attached to the anchor member 121. Furthermore, the posture-changing section 133 may be formed so that its polar section modulus is smaller than that of the mounting section when it is intended to allow the mounting section to be twisted, and so that its section modulus is smaller than that of the mounting section when it is intended to allow the mounting section to be bent, so long as it can facilitate twisting and bending, respectively.

[0028] FIG. 3 is a diagram showing the installation state of the discarded frame 13 in this embodiment (a diagram showing the lower part of the three-sided frame), with FIG. 3(a) being a front view, FIG. 3(b) being a side view, and FIG. 3(c) being a bottom view. As shown in Fig. 3, the throwaway frame 13 of this embodiment is attached to the lower end sides of the vertical frames 12a, 12b on both sides. The mounting parts 132 erected at both ends of the throwaway frame 13 are configured to face the anchor members 121 of the vertical frames 12a, 12b at both ends, and the throwaway frame 13 is attached to the three-sided jamb 1 by screwing the mounting parts 132 to the anchor members 121 (in this embodiment, drilling and fastening to the anchor members 121 are performed simultaneously using drill screws). A plurality of screw holes H are formed in the mounting parts 132 in the height direction, so that it is possible to accommodate differences in the positions of the anchor members 121 of the vertical frames. In this embodiment, the mounting portion 132 is positioned on the outer side of the anchor member 121, but the mounting portion 132 may be positioned on the inner side of the anchor member 121.

[0029] FIG. 4 is a diagram (bottom view) showing another attachment state of the throw-away frame 13 of this embodiment. FIG. 4 shows a state in which a temporary frame 13 is attached to vertical frames 12a-1 and 12b-1 different from those in FIG. Here, there is a term "hibata" in architectural terms, which refers to a convex part carved to create a groove in a threshold or lintel. The vertical frames 12a and 12b in Fig. 3 above are called "double hibata frames," and the vertical frames 12a-1 and 12b-1 in Fig. 4 are fitting frames called "single hibata frames." In such "single hibata frames," an anchor member 121 may be installed at an angle, as shown in Fig. 4. Even when such an anchor member 121 is inclined, the throw-away frame 13 of this embodiment is provided with a posture changing portion 133 that allows the mounting portion 132 to be twisted relative to the bridging portion 131, so that the mounting portion 132 can be properly attached to the anchor member 121, as can be seen from Figure 4. In addition, the operation of twisting the mounting portion 132 relative to the bridging portion 131 may be performed in advance of installation, or such active twisting operation may not be performed, and the mounting portion 132 may be passively twisted by the fastening force used when screwing the mounting portion 132 to the anchor member 121.

[0030] As described above, the three-sided frame 1 equipped with the throw-away frame 13 of this embodiment eliminates the need for work such as forming the base material 300, which is a component solely for attaching the throw-away frame 200, as shown in Figure 8, and welding the base material 300 to the vertical frames 12a, 12b, thereby improving workability and work efficiency, and is extremely useful. Furthermore, as described above, by providing the position changing portion 133, the throw-away frame 13 can be attached properly and easily even in cases where the anchor member 121 is provided at an angle, such as in a "single-sided frame." Furthermore, since the throw-away frame 13 of this embodiment has the structure described above, it can be integrally formed by shear press processing a plate-like member such as a steel plate, and therefore can be manufactured relatively inexpensively and with high productivity.

[0031] In this embodiment, the waste frame is attached to the lower end of the vertical frame, but the present invention is not limited to this. For example, the waste frame may be attached to the vertical frame from the front side (or rear side) in the same spirit as that shown in Fig. 7(c) (described later).

[0032] (Embodiment 2) 5A, 5B, and 5C are diagrams showing the throw-away frame 13-1 of this embodiment, with FIG. 5(a) being a front view, FIG. 4(b) being a side view, and FIG. 5(c) being a bottom view. In addition, the three-sided frame with the discarded frame 13-1 in this embodiment is a fixture frame (door frame) installed in an opening, as in embodiment 1, and the upper frame, vertical frame, and anchor members provided on the vertical frames that make up the three-sided frame are the same as in embodiment 1, so the same symbols as in embodiment 1 are used and their explanations are omitted here.

[0033] The throw-away frame 13-1 of this embodiment has a bridging portion 131-1 that spans between the two vertical frames 12a, 12b, and attachment portions 132-1 that are provided at both ends of the bridging portion 131-1. The throw-away frame 13-1 of this embodiment is a member formed by cutting and bending a steel plate (shear press processing), and the bridging portion 131-1 and the attachment portion 132-1 (including the arm portion 134) are integrally formed.

[0034] Similarly to the first embodiment, the bridging portion 131-1 has a length (length in the width direction) that is bridged between the two vertical frames 12a, 12b so as to function as a "temporary lower frame." The bridging portion 131-1 of this embodiment includes receiving recesses 1311 that respectively receive the two vertical frames 12a, 12b, and an inner placement portion 1312 that is placed between the two vertical frames 12a, 12b. The inner placement portion 1312 is formed in a cross-sectional shape perpendicular to the longitudinal direction (width direction) that is approximately U-shaped (U-shaped with an opening on the inside in the depth direction (when the throw-away frame is arranged on the lower side (lower side in FIG. 5(c)) relative to the three-sided frame as in FIG. 5(c), the opening is U-shaped on the upper side (upper side in FIG. 5(c)); when the throw-away frame is arranged on the upper side (upper side in FIG. 5(c)) opposite to FIG. 5(c), the opening is U-shaped on the lower side (lower side in FIG. 5(c))). The receiving recess 1311 is configured by a portion at both ends of the bridging portion 131-1 that does not have the upper and lower surfaces forming the U-shaped cross section of the inner arrangement portion 1312, but only the front side surface (or the rear side surface). The receiving recess 1311 is formed with a size capable of receiving the front side (or rear side) ends of the vertical frames 12a, 12b. In this embodiment, the bridging portion 131 is formed by shear pressing a steel plate, but the present invention is not limited to this, and any member having the strength required to stabilize the three-sided frame (for example, a member made of a rod-shaped member and joined (welded, etc.) to the arm portion 134) may be used.

[0035] The attachment portion 132-1 in this embodiment is a plate-shaped member, and is connected to both ends of the bridge portion 131-1 via arm portions . The arm portion 134 is a plate-shaped member that extends in the depth direction from both ends of the bridge portion 131-1, and the tip portion thereof is bent to form the attachment portion 132-1. The mounting portion 132-1 has a flat surface that is substantially perpendicular to the depth direction, and is provided with a screw hole H for screwing to a receiving member 14 (and an anchor member 121 therethrough) described below. In this embodiment, the mounting portion 132-1 is a plate-like member, and a rectangular shape is used as an example, but the present invention is not limited to this, and the mounting portion 132-1 may have any shape as long as it can be attached to the receiving member 14. In addition, the arm member is not limited to a plate-shaped member that is formed integrally with the mounting portion 132-1, etc., but may be, for example, formed from a rod-shaped member (separate member) and connected (welded, etc.) to the mounting portion and the bridging portion, respectively.

[0036] 6A to 6C are diagrams showing the installation state of the throw-away frame 13-1 in this embodiment (diagrams showing the lower part of the three-sided frame), with FIG. 6(a) being a front view, FIG. 6(b) being a side view, and FIG. 6(c) being a bottom view. The three-sided frame of the present embodiment is provided with a receiving member 14 which faces the mounting portion 132-1 in the depth direction (the vertical direction in FIG. 6(c)) and is fixed (by welding or the like) to the anchor member 121. The receiving member 14 is an L-shaped member in a top view, and has a mounting surface for the anchor member 121 and a flat surface (a surface facing the mounting portion 132-1) that is substantially perpendicular to the depth direction. As shown in FIG. 6, the receiving member 14 is fixed to the anchor members 121 (the lowermost anchor members) of each of the vertical frames 12a and 12b. In this embodiment, the receiving member 14 is an L-shaped member as an example, but the present invention is not limited to this, and it is sufficient if it can be fixed to the anchor member 121 and has a surface facing the mounting portion 132-1.

[0037] The throw-away frame 13-1 of this embodiment is detachably attached to the anchor member 121 by attaching mounting portions 132-1 at both ends of the throw-away frame 13-1 to the left and right receiving members 14 with screws (mounting members) S. The screw (mounting member) S is an "attachment member that can be attached and detached in the depth direction (the axis of the screw is along the depth direction)" because the receiving member 14 and the opposing mounting part 132-1 have surfaces that are approximately perpendicular to the depth direction. In other words, "the mounting part is attached to the anchor member by the mounting member that can be attached and detached in the depth direction of the opening." As a result, as can be seen from FIG. 6, it is possible to access the screws S from the front side (or rear side) and perform the operation of removing the throw-away frame 13-1.

[0038] The work of installing the three-sided jamb to which the throw-away frame 13-1 of this embodiment is attached in the opening can be performed by the following steps. The steps include a step of installing a three-sided jamb (having a four-sided jamb configuration) with a throw-away jamb 13-1 still attached at the opening A, and a step of removing the throw-away jamb 13-1 after the three-sided jamb is installed. Installation work (for example, welding the anchor members to rebars on the main body while the four-sided frame structure is still in place) can be done with the throw-away frame 13-1 still attached, meaning that work can be done in a highly stable state (with the four-sided frame in place). After the three-sided frame is installed, the throw-away frame 13-1 can be removed by removing the screws S from the front side (or back side), making for extremely easy work.

[0039] As described above, according to the three-sided jamb having the throw-away frame 13-1 of this embodiment, the throw-away frame 13-1 can be removed after the three-sided jamb is installed, resulting in excellent workability. In addition, the bridging portion 131-1 has a receiving recess 1311, which prevents the throw-away frame 13-1, which is attached from the front side (or rear side), from protruding from the front side (or rear side). This is advantageous in that it reduces bulkiness during transportation, etc., and reduces interference with other components. In addition, since the inner arrangement portion 1312 is sandwiched between the vertical frames 12a, 12b and is configured to abut against the inner surfaces of the vertical frames 12a, 12b, this contributes to improving the stability of the frame body. Furthermore, since the attached throw-away frame 13-1 can be configured so as not to protrude below the lower end of the vertical frame, even in an installation state in which the vertical frames 12a, 12b are in contact with the floor surface F (see Figure 1), it is possible to install the frame body in the opening with the throw-away frame 13-1 still attached.

[0040] FIG. 7 shows modified examples and modified usage examples of the throwaway frame 13-1 of this embodiment. Fig. 7(a) shows a modified example of use when the anchor member 121 is slanted, such as in a "single-sided slat frame". In this example, by using a receiving member 14-1 with a different bending angle, the throw-away frame 13-1 can be appropriately attached even when the anchor member 121 is slanted. Fig. 7(b) shows an anchor member 121-1 bent into a crank shape, which allows the mounting part 132-1 to be attached directly to the anchor member 121-1 without using a receiving member (the anchor member has a surface that faces the mounting part in the depth direction of the opening, and the mounting part is attached to the facing surface). Note that a "single-sided slat frame" is used as an example here, but even in vertical frames 12a, 12b ("double-sided slat frames"), etc., it is also possible to use a bent anchor member so that the mounting part can be attached directly to the anchor member using a "screw that is detachable in the depth direction". In this embodiment, a "screw that can be attached and detached in the depth direction" can be used, but the throw-away frame having the configuration of the bridge portion of this embodiment may have a screw attachment structure similar to that of embodiment 1. Fig. 7(c) shows such an example. The throw-away frame 13-2 in Fig. 7(c) uses the arm portion of embodiment 2 as the attachment portion. Fig. 7(d) shows a modification of the throw-away frame 13-2 of Fig. 7(c) that is applicable to an inclined anchor member 121, and has a position changer 133-1 formed on the arm portion that functions as the mounting portion. Similar to the position changer 133 of the first embodiment, the position changer 133-1 is configured by forming the width (vertical dimension) of the plate of the arm portion (mounting portion), which is a plate-like member, small. In this example, the position changer 133-1 is configured to be able to bend the mounting portion.

[0041] In each embodiment, the throw-away frame is attached to the lower end of the vertical frame (the lowest anchor member), but the present invention is not limited to this. The throw-away frame may be attached to an anchor member of any height that is provided in multiple stages in the vertical direction. In addition, the throw-away frame may be attached to multiple locations (for example, the lowest stage and an intermediate portion). Also, when the throw-away frame is attached from the front side (or rear side) as in embodiment 2, the throw-away frame may be attached from both the front side and the rear side.

[0042] In each embodiment, the throw-away frame is an integrally formed member formed by cutting and bending a steel plate (shear press processing), but the present invention is not limited to this, and any material, shape, and processing method that can realize the concept of the present invention based on the above description and has the necessary strength may be used. For example, the mounting part and the position changing part may be formed separately from the bridging part and then joined to the bridging part.

[0043] In each embodiment, a door frame is used as an example of a three-sided frame, but the present invention is not limited thereto and can be applied to any three-sided frame having an anchor member. For example, the present invention can be applied to a sliding door frame when a sliding door is used as an opening / closing body, and can also be applied to a three-sided frame installed in an opening without an opening / closing body. [Explanation of symbols]

[0044] 1...Three-sided frame 11...Top frame 12a, 12b...vertical frame 121...Anchor member 13...Discarded frame 131...Bridge part 1311...receiving recess 1312...Inner placement part 132...Mounting part 133... Posture change section 14... Support member A...Opening H...Threaded hole S...Screw (mounting part)

Claims

1. A three-sided frame installed at an opening, An upper frame arranged at the top, Two vertical frames on both sides, An anchor member provided on each of the two vertical frames on a side facing the opening, the anchor member being used to fix the frame to the opening; A temporary frame that is removed when the three-sided jamb is installed, and has attachment parts at both ends that are attached directly or via other members to the anchor members of the two vertical frames; It has a three-sided frame.

2. The jamb according to claim 1 , further comprising a position changing portion for changing the position of the mounting portion.

3. The throwaway frame has a bridge portion that is stretched between the two vertical frames, The mounting portion is provided on both ends of the bridge portion, 3. The three-sided jamb according to claim 2, wherein the position changing portion is constituted by forming a portion having a reduced cross-sectional area at a base portion of the upright mounting portion.

4. The jamb according to claim 3 , wherein the mounting portion is a plate-like member, and the width of the plate is narrowed at the base portion, thereby forming the position changing portion.

5. The jamb according to claim 4 , wherein the mounting portion is formed with a plurality of screw holes for screwing to the anchor member.

6. The three-sided jamb according to claim 4 , wherein the bridging portion, the mounting portion, and the throw-away portion including the position-changing portion are integrally formed.

7. The three-sided jamb according to any one of claims 1 to 6, wherein the waste frame is attached from the front side or the back side of the vertical frame.

8. The jamb according to claim 1 , wherein the mounting portion is attached to the anchor member by a detachable mounting member in the depth direction of the opening.

9. The jamb according to claim 8, further comprising a receiving member that faces the mounting portion in the depth direction of the opening and is fixed to the anchor member, the mounting portion being attached to the receiving member.

10. The three-sided jamb according to claim 8 , wherein the anchor member has a surface that faces the mounting portion in the depth direction of the opening, and the mounting portion is attached to the facing surface.

11. The throwaway frame has a bridge portion that is stretched between the two vertical frames, The three-sided jamb according to claim 8 , wherein the bridging portion has receiving recesses that respectively receive the two vertical frames, and an inner placement portion that is disposed between the two vertical frames.

12. The three-sided jamb according to any one of claims 8 to 11, wherein the temporary frame including the bridge portion and the mounting portion is integrally formed.

13. A method for installing a jamb according to claim 8, comprising the steps of: A step of placing the jamb with the discarded frame attached in the opening; removing the waste frame after the three-sided jamb is installed; A method for installing a three-sided frame.

Images