Method for removing a wedge member, wedge member, and removal jig

Abstract

Remove the wedge member that was fitted into the gap between the wooden beam, which was passed through a through-hole formed in the wooden column, and the through-hole. [Solution] The method for removing the wedge member comprises an installation step of attaching a removal jig 100, which is movable along the wooden beam 30, to a wedge member 50 fitted into the gap between the wooden beam 30 and the through hole 24 formed in the wooden column 20, and an extraction step of using a jack 100 to move the removal jig 50 away from the wooden column 20, with the side surface 22 of the wooden column 20 acting as a reaction force receiver, and removing the wedge member 50 from the through hole 24.

Description

Technical Field

[0001] The present invention relates to a method for extracting a wedge member, a wedge member, and an extraction jig.

Background Art

[0002] Patent Document 1 discloses techniques related to wedges, long wedges, wrap-type long wedges, and their through-joints. In this prior art, on the bottom surface of the wedge that is in contact with the upper surface of the through-hole of the through-hole provided in the column and fitted into the through-hole, a notch is provided from the rear end surface in the driving direction of the wedge toward the driving direction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a through-joint structure in which a wedge member is driven into the gap between a wooden beam passed through a through-hole formed in a wooden column and the through-hole, it is difficult to extract the wedge member because the wooden beam is firmly tightened. Therefore, for example, in the demolition of a building, the wooden column and the wooden beam are cut and demolished, so that the wooden column and the wooden beam become shorter and their utilization value is reduced, such as being unable to be reused.

[0005] In view of the above facts, an object of the present invention is to extract a wedge member fitted into the gap between a wooden beam passed through a through-hole formed in a wooden column and the through-hole.

Means for Solving the Problems

[0006] The first embodiment is a method for removing a wedge member, comprising: an attachment step of attaching a removal jig that can move along the wooden beam to a wedge member fitted into the gap between the wooden beam and the through hole formed in the wooden column; and an extraction step of using a jack to move the removal jig in a direction away from the wooden column, with the side surface of the wooden column acting as a reaction force receiver, and removing the wedge member from the through hole.

[0007] In the first embodiment of the wedge member removal method, a removal jig is attached to the wedge member, which is fitted into the gap between the wooden beam and the through-hole formed in the wooden column, and the wedge member is removed from the through-hole by using a jack to move the removal jig away from the wooden column, with the side of the wooden column acting as a reaction force receiver.

[0008] The second embodiment is the extraction method described in the first embodiment, wherein the mounting step involves engaging the engaging portion of the extraction jig with the engaged portion of the wedge member and attaching the extraction jig to the wedge member.

[0009] In the second embodiment of the wedge member extraction method, the extraction jig is attached to the wedge member by engaging the engaging portion of the extraction jig with the engaged portion of the wedge member.

[0010] The third embodiment is a wedge member that is fitted into the gap between a wooden beam that passes through a through hole formed in a wooden column and the through hole, and has an engaged portion that engages with an engaging portion of an extraction jig that is pulled out of the through hole by moving the side surface of the wooden column away from the wooden column with a jack, using the side surface of the wooden column as a reaction force receiver.

[0011] In the third embodiment of the wedge member, the wedge member is fitted into the gap between the wooden beam, which is passed through a through hole formed in the wooden column, and the through hole. The engaging portion of the extraction jig is then engaged with the engaged portion of the wedge member, which is fitted into the gap between the through hole and the through hole. The side of the wooden column acts as a reaction force receiver, and the extraction jig is moved away from the wooden column by a jack, thereby removing the wedge member from the through hole.

[0012] In the fourth embodiment of the extraction jig, the engaging portion of the extraction jig is engaged with the engaged portion of the wedge member, which is fitted into the gap between the wooden beam and the through-hole formed in the wooden column. The extraction jig is then moved away from the wooden column by a jack, using the side of the wooden column as a reaction force receiver, thereby removing the wedge member from the through-hole. [Effects of the Invention]

[0013] According to the present invention, a wedge member fitted into the gap between a wooden beam that passes through a through hole formed in a wooden column and the through hole can be removed. [Brief explanation of the drawing]

[0014] [Figure 1] This is a side view of the through-joint structure. [Figure 2] This is a longitudinal cross-sectional view along the X direction in Figure 1. [Figure 3] This is a perspective view of a through-joint structure. [Figure 4] This is a perspective view of the extraction jig. [Figure 5] This is a longitudinal cross-sectional view along the X direction, showing the wedge member of the through-joint structure in Figure 1 with the extraction jig shown in Figure 4 attached. [Figure 6] This is a plan view of the wedge member of the through-joint structure shown in Figure 1 with the extraction jig shown in Figure 4 attached. [Figure 7] This is a longitudinal cross-sectional view along the X direction, showing the extraction jig shown in Figure 4 with a jack attached to the wedge member of the through-joint structure shown in Figure 1. [Figure 8] Figure 7 shows a longitudinal cross-sectional view along the X direction of an example where a plate material is sandwiched. [Modes for carrying out the invention]

[0015] <Embodiment> A method for extracting a wedge member, a wedge member, and an extraction jig according to one embodiment of the present invention will be described.

[0016] Here, two orthogonal directions in the horizontal direction are defined as the X direction and the Y direction, which are indicated by arrow X and arrow Y respectively. The vertical direction orthogonal to the X direction and the Y direction is defined as the Z direction, which is indicated by arrow Z.

[0017] Also, each drawing is only schematically shown. Dimensions, ratios, etc. of each element shown in the drawings may not necessarily match the actual ones. Even among multiple drawings, dimensions, ratios, the number of elements, etc. may not necessarily match. When it becomes difficult to view, hatching representing a cross-section is omitted.

[0018] In addition, descriptions of configurations not directly related to the present invention and well-known configurations may be omitted or simplified.

[0019] [Through-joint structure] First, the through-joint structure using the wedge of the present embodiment will be described.

[0020] As shown in FIGS. 1, 2, and 3, the through-joint structure 10 includes a wooden column 20, a wooden beam 30, and a wedge member 50. The wooden column 20 and the wooden beam 30 are made of wooden materials such as solid wood or laminated wood. Also, the wooden column 20 and the wooden beam 30 in the present embodiment have a rectangular cross-section.

[0021] Note that the beam direction of the wooden beam 30 is the X direction and the beam width direction is the Y direction. Also, the view from the Z direction is defined as a plan view, the view from the X direction is defined as a front view, and the view from the Y direction is defined as a side view.

[0022] A through-hole 24 having a rectangular cross-section is formed in the wooden column 20 from one side surface 22 to the other side surface 22. The wooden beam 30 is inserted into the through-hole 24. Wedge members 50 are respectively fitted into the gap between the upper surface 26 of the inner wall of the through-hole 24 and the upper surface 32 of the wooden beam 30 from both sides in the through direction (X direction).

[0023] In this embodiment, a wooden wedge support member 40 is sandwiched between the bottom surface 52 of the wedge member 50 and the upper inner wall surface 26 of the through hole 24. The wedge support member 40 is a wooden member that fills the gap between the upper inner wall surface 26 of the through hole 24 and the inclined surface 54 of the wedge member 50.

[0024] The wedge receiving member 40 has a flat upper surface 42 and a sloping lower surface 44 that slopes downward towards the center, giving it a downward convex shape. The wedge receiving member 40 is fixed, for example, by screws (not shown), with its upper surface 42 in contact with the upper inner wall surface 26 of the through hole 24.

[0025] In this embodiment, a nail 64 (see Figure 3) is driven into the wooden beam 30 through a nail hole 62 (see Figure 3) formed in the wedge member 50, which will be described later.

[0026] [Wedge member] Next, the wedge member of this embodiment will be described. Note that the structure of the wedge member is an example and is not limited to this.

[0027] The pair of wedge members 50 are members that fix the wooden beam 30 to the wooden column 20 by filling the gap between the inclined surface 44 of the wedge receiving member 40, which is fixed to the upper surface 26 of the inner wall of the through hole 24 of the wooden column 20, and the upper surface 32 of the wooden beam 30.

[0028] The wedge member 50 in this embodiment is made of metal, and in this embodiment, it is made of iron. The wedge member 50 is substantially rectangular in shape when viewed from above. The bottom surface 52 of the wedge member 50 is flat, and the top surface is inclined 54. The inclined surface 54 is substantially trapezoidal in shape, becoming thinner from one end 51A to the other end 51B. The inclination angle of the inclined surface 54 of the wedge member 50 is substantially the same as the inclination angle of the inclined surface 44 of the wedge receiving member 40 described above.

[0029] The wedge member 50 has a mounting hole 60 into which a removal jig 100, described later, is attached. The mounting hole 60, as an example of the engaged portion, is a hole that penetrates vertically and is located approximately in the center of the beam width direction (Y direction) in a plan view. The mounting hole 60 is formed in a position that is exposed from the through hole 24 when the wedge member 50 is fitted in place. The mounting hole 60 is also formed along a direction approximately normal to the bottom surface 52.

[0030] In this embodiment, the wedge member 50 has nail holes 62 with a smaller diameter than the mounting hole 60 formed on both sides of the mounting hole 60 in the beam width direction (Y direction) when viewed from above (see Figure 3).

[0031] The wedge member 50 is then fitted between the inclined surface 44 of the wedge receiving member 40 and the upper surface 32 of the wooden beam 30 from both sides of the through hole 24 in the wooden column 20, thereby fixing the wooden beam 30 to the wooden column 20.

[0032] In this embodiment, the wedge member 50 is fitted in by driving one end 51A with a hammer or the like, but it is not limited to this.

[0033] In this embodiment, after the wedge member 50 is fitted, a nail 64 (see Figure 3) is driven through the nail hole 62 (see Figure 3) to fix it to the wooden beam 30.

[0034] [Extraction jig] Next, the extraction jig of this embodiment will be described. Note that the structure of the extraction jig is an example and is not limited to this.

[0035] As shown in Figure 4, the extraction jig 100 is composed of a base portion 110, a mounting plate portion 106, a pair of side plate portions 104, a rib plate portion 102, and a mounting rod 120. All components of the extraction jig 100 are made of metal and are joined together by welding. The orientation of the extraction jig 100 will be described in the state where it is attached to the wedge member 50 (see Figure 5).

[0036] The base portion 110 has a rectangular bottom plate portion 112 and a vertical plate portion 114, and is L-shaped when viewed from the side. The rib plate portion 102 is roughly triangular in shape and is joined to the bottom plate portion 112 and the vertical plate portion 114 of the base portion 110.

[0037] The mounting plate portion 106 is rectangular in shape, and one end is joined to the middle of the vertical plate portion 114 of the base portion 110 in the height direction. Therefore, the mounting plate portion 106 protrudes in the opposite direction to the direction in which the bottom plate portion 112 extends from the middle of the vertical plate portion 114 of the base portion 110. The mounting plate portion 106 is wider in the Y direction than the base portion 110 (see Figure 6). The distance between the lower surface of the mounting plate portion 106 and the lower surface of the bottom plate portion 112 in the height direction is slightly greater than the thickness of one end portion 51A of the wedge member 50 (see Figures 1 to 3) (see Figure 5).

[0038] Each of the pair of side plates 104 is rectangular in shape and is joined to both ends in the Y direction of the vertical plate portion 114 of the base portion 110 and to the upper surface of the mounting plate portion 106 (see Figure 6). The distance between the pair of side plates 104 in the Y direction (see Figure 6) is large enough to accommodate the jack body 202 of the jack 200 (see Figure 7), which will be described later.

[0039] An insertion hole 108 is formed approximately in the center of the mounting plate portion 106 in a plan view. A mounting rod 120 is inserted through and joined to the insertion hole 18. The lower end portion 122 of the mounting rod 120, as an example of an engaging portion, is positioned slightly above the height relative to the bottom plate portion 112 of the base portion 110.

[0040] [Method for removing wedge-type components] Next, the method for removing the wedge member in this embodiment will be described.

[0041] First, as shown in Figures 5 and 6, the mounting rod 120 of the extraction jig 100 is inserted into the mounting hole 60 (see Figure 6) of the wedge member 50, thereby attaching the extraction jig 100 to the wedge member 50. The extraction jig 100 is movable along the beam direction (X direction) of the wooden beam 30.

[0042] As shown in Figure 5, when the extraction jig 100 is attached to the wedge member 50, the mounting plate portion 106 of the wedge member 50 is located above the wedge member 50. The lower side of the mounting plate portion 106 on the vertical plate portion 114 of the extraction jig 100 is close to one end portion 51A of the wedge member 50. Also, the bottom plate portion 112 of the wedge member 50 is in contact with the upper surface 32 of the wooden beam 30.

[0043] Next, as shown in Figure 7, a jack 200 is installed between the side surface 22 of the wooden column 20 and the vertical plate portion 114 of the extraction jig 100.

[0044] In this embodiment, a small flat jack is used for the jack 200, but it is not limited to this. The jack 200 in this embodiment is composed of a jack body 202, a piston rod 210, and a connecting part 220. A tube 222 is connected to the connecting part 220. The tube 222 is connected to an oil pump (not shown). The piston rod 210 protrudes from the jack body 202 by hydraulic pressure from the oil pump.

[0045] In this way, the piston rod 210 is extended from the jack body 202 by hydraulic pressure, and the side surface 22 of the wooden column 20 is used as a reaction force receiver to move the extraction jig 100 away from the wooden column 20. As a result, the wedge member 50, into which the mounting rod 120 of the extraction jig 100 is inserted into the mounting hole 60, also moves away from the wooden column 20 together with the extraction jig 100, and the wedge member 50 is removed from the through hole 24.

[0046] As shown in Figure 8, if the stroke of the piston rod 210 of the jack 200 is insufficient, or to prevent damage to the side surface 22 of the wooden column 20, one or more plates 250 may be inserted in between. Figure 8 shows an example in which plates 250 are inserted between the jack body 202 of the jack 200 and the vertical plate portion 114 of the extraction jig 100, and between the piston rod 210 of the jack 200 and the side surface 22 of the wooden column 20, but is not limited to this.

[0047] In this embodiment, as described above, the wedge member 50 is firmly fixed by driving the nail 64 (see Figure 3) through the nail hole 62 (see Figure 3) into the wooden beam 30. Therefore, it is desirable to remove the nail 64 before attaching the removal jig 100 to the wedge member 50.

[0048] <effect> Next, the operation of this embodiment will be described.

[0049] In the through-joint structure 10, in which a wedge member 50 is fitted into the gap between a wooden beam 30 that passes through a through-hole 24 formed in a wooden column 20 and the through-hole 24, it is difficult to remove the wedge member 50 because the wooden beam 30 is rigidly compressed.

[0050] Therefore, in this embodiment, the mounting rod 120 of the extraction jig 100 is inserted into the mounting hole 60 of the wedge member 50 and attached, and the side surface 22 of the wooden column 20 is used as a reaction force receiver, and the extraction jig 100 is moved away from the wooden column by the jack 200, so that the wedge member 50 moves away from the wooden column 20 together with the extraction jig 100, and the wedge member 50 is extracted.

[0051] In this way, by attaching the extraction jig 100, the wedge member 50 can be extracted with the jack 200. Therefore, the building can be dismantled without cutting the wooden columns 20 and wooden beams 30, and the wooden columns 20 and wooden beams 30 can be reused. In other words, this method has greater utility compared to dismantling the building by cutting the wooden columns 20 and wooden beams 30.

[0052] Furthermore, in this embodiment, a nail hole 62 is formed in the wedge member 50, and the wedge member 50 is fixed to the wooden beam 30 with a nail 64 (see Figure 3). Therefore, in the through-joint structure 10 of this embodiment, the wedge member 50 is less likely to shift from the wooden beam 30.

[0053] <Other> Furthermore, the present invention is not limited to the embodiments described above.

[0054] For example, in the above embodiment, the wedge member 50 was attached by inserting the mounting rod 120 of the extraction jig 100 into the mounting hole 60 that penetrates vertically, but it is not limited to this. For example, the wedge member 50 may have a recess such as a groove, and the extraction jig 100 may have a protrusion that fits into the recess such as the groove. Alternatively, the wedge member 50 may have a hole or protrusion, and the extraction jig 100 may have a rod-shaped part or a recess. The point is that the wedge member can be attached by engaging the engaging part of the extraction jig with the engaging part of the wedge member.

[0055] Furthermore, although the wedge member 50 was made of iron in the above embodiment, it is not limited to this. The wedge member 50 may be made of a metal material other than iron, or it may be made of a material other than metal, such as wood.

[0056] Furthermore, the present invention can be implemented in various forms without departing from the spirit of the invention. [Explanation of symbols]

[0057] 10 Through joint structure 20 Wooden Pillar 22 Side view 30 Wood beam 50 Wedge member 60 Mounting hole (example of the part to be engaged) 100 Extraction jigs 120 Mounting rod (example of engagement part) 200 Jack

Claims

1. Installation step: A wedge member fitted into the gap between a wooden beam that passes through a through hole formed in a wooden column and the through hole is fitted with a removal jig that can move along the wooden beam. The extraction process involves using the side surface of the wooden column as a reaction force receiver, moving the extraction jig in a direction away from the wooden column with a jack, and extracting the wedge member from the through hole. A method for removing a wedge member equipped with [a specific component].

2. The aforementioned mounting process is, The engaging portion of the extraction jig is engaged with the engaged portion of the wedge member, and the extraction jig is attached to the wedge member. The extraction method according to claim 1.

3. A wedge member that is fitted into the gap between a wooden beam that passes through a through hole formed in a wooden column and the through hole, The wooden column has an engaging portion that engages with the engaging portion of the extraction jig, which is used to remove the wooden column from the through hole by moving the jack in a direction away from the wooden column using the side surface of the wooden column as a reaction force receiver. Wedge member.

4. The wooden beam is passed through a through hole formed in the wooden column, and the wedge member is fitted into the gap between the beam and the through hole, with the engaging portion of the wedge member engaging with the engaged portion of the wedge member to secure it in place. The wedge member is removed from the through-hole by using the side surface of the wooden column as a reaction force receiver and moving it away from the wooden column with a jack. Extraction jig.

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