JP2018184734A - Rafter joint structure and roof structure and construction method of rafter joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rafter joint structure which is not affected by the construction accuracy of the whole building and can join the rafters to each other accurately.SOLUTION: The rafter joint structure 1 is a structure that joins long rafters 2 to each other which are arranged in plural numbers in a row and inclined along a roof gradient at end parts 2a that are mutually adjacent in the longitudinal direction of the rafters 2. It includes rafter supporting materials 3 which support the rafters 2 and are orthogonal to the rafters 2 in plan view, and long rafters 2 mounted on the rafter supporting materials 3, and a jointing part 4 formed of overlapped end surfaces 2b formed at the end parts 2a of the rafters 2 has a displacement suppressing part 6 for suppressing displacement of the rafters 2.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a joint structure of drooping wood that joins a plurality of long sloping timbers that are inclined along a roof slope and are arranged in a row at an end adjacent to the longitudinal direction of the drooping timber.

  Conventionally, when a large roof such as a large roof between beams or a single-flow roof is formed, wooden hanging timbers that are inclined along the roof gradient are sometimes used together. The joints of hanging timber require high-precision construction because a smooth roof surface cannot be formed unless they are joined together accurately, but on the other hand, the work of accurately joining long sloping hanging timber The construction accuracy was largely dependent on the technology of the installer. In order to solve this problem, the invention of Patent Document 1 has been proposed.

  The invention described in Patent Literature 1 describes a joint structure of a rafter that can easily install components constituting rafters and accurately connect the components at a construction site. In the present invention, a notch having a triangular cross-sectional view is provided at the longitudinal end of the component member, and the component member can be easily positioned by hooking the notch on the rafter support material that supports the component member. It is disclosed that constituent members can be accurately connected.

JP2016-194208A

  By the way, the roof construction is done after the installation of the foundation and the construction work such as pillars, beams and purlins are completed. Drooping wood that affects the eaves is installed while absorbing these construction errors within an acceptable range. However, in the invention of Patent Document 1, since the structural member is positioned by hooking a notch provided in the longitudinal end portion of the structural member to the rafter support material, the structural member can be moved in the longitudinal direction. The position of the constituent member in the longitudinal direction cannot be finely adjusted. For this reason, construction errors in various places and variations in the length of the lumber itself cannot be absorbed, and the eaves may not be evenly provided.

  Further, as shown in FIG. 10, a common hanging lumber joint uses many so-called warp joints C that join end surfaces B that are inclined with respect to the upper and lower surfaces of the hanging wood A, as described above. Due to various construction errors and variations in the length of the hanging lumber A itself, a gap La is generated between the end faces B and a deviation Lb between the hanging lumbers A is generated. This deviation Lb is caused by a force X orthogonal to the upper and lower surfaces of the suspended lumber A, forms a step at the joint of the suspended lumber, and the unevenness or shakiness of the roof base material placed on the suspended lumber. Cause. However, if the hanging lumber A is arranged with priority given to the eaves and the like, there is a high possibility that the displacement Lb will increase under the influence of construction errors that have occurred in various places, making it difficult to construct a smooth roof surface. It has become.

  Then, this invention is made | formed in view of the subject mentioned above, Comprising: It provides the joint structure of the hanging timber which can connect hanging timbers accurately without being influenced by the construction precision of the whole building. With the goal.

  The joint structure of the first hanging lumber according to the present invention is a hanging structure in which a plurality of long hanging timbers that are inclined along the roof gradient and arranged in a row are joined at ends adjacent to each other in the longitudinal direction of the hanging timber. A wood joint structure comprising: a rafter support that supports the rafters and is orthogonal to the rafters in plan view; and the long rafters that are mounted on the rafters support, The joint portion formed by overlapping the end surfaces formed on the end portions of the wood has a deviation suppressing portion for suppressing a shift between the hanging woods.

  In the second rafter lumber joint structure according to the present invention, the shift suppression portion is parallel to a first side surface of the rafter lumber facing the rafter support member and a second side surface opposite to the first side surface. It is characterized by being formed.

  In the third hanging lumber joint structure of the present invention, the end surface has a step surface that forms a step on the end surface, and the displacement suppressing portion is formed by abutting the step surfaces of the end surfaces. It is characterized by that.

  In the fourth hanging lumber joint structure of the present invention, the end portion forms a slit dug in the longitudinal direction of the hanging lumber from the end face, and the displacement suppressing portion prevents the dripping lumber from shifting. It is characterized by being formed by inserting a wedge metal fitting to be suppressed into the slit.

  In the fifth hanging wood joint structure of the present invention, the wedge metal fitting is formed by bending a flat plate-like slit insertion portion inserted into the slit and one end of the slit insertion portion, and is fixed to the hanging wood. It has a fixed part.

  The roof structure of the present invention has any one of the first to fifth hanging wood joint structures.

  The hanging wood joint construction method of the present invention is a hanging wood joint construction method for joining suspended woods using the hanging wood joint structure according to any one of the first to fifth aspects, wherein a plurality of supporting woods are supported. The rafter support members are arranged so as to be orthogonal to the roof gradient and the rafter timber in plan view, and are arranged in parallel to each other while forming a height difference along the roof gradient, along the roof gradient. Water-side drooping wood located on the waterside of the rafters placed on the waterside located on the waterside of the rafters placed and fixed on the rafter support material and arranged along the roof gradient. After forming the joint portion having a shift suppression portion that suppresses the deviation of the suspended wood by overlapping the end surface of the suspended wood and the end surface of the underwater suspended wood, It is characterized by being fixed to the underwater hanging wood.

  According to the joint structure of the hanging timber of the present invention, the joint formed by overlapping the end surfaces of the hanging timber has a shift suppressing portion for suppressing the displacement of the hanging timber, It is possible to construct a highly precise hanging lumber joint structure by preventing the shift of the hanging lumber joint due to errors and variations in the length of the hanging lumber.

  According to the joint structure of the hanging timber of the present invention, the deviation suppressing portion is formed in parallel with the first side face facing the rafter supporting material of the hanging timber and the second side face opposite to the first side face. It is possible to effectively resist the force of shifting the suspended wood acting perpendicularly to the first side surface and the second side surface along the gradient, and to prevent the displacement of the joint portion of the suspended wood, so that the highly accurate hanging A wood joint structure can be constructed.

  According to the hanging lumber joint structure of the present invention, the shift suppression portion is formed by abutting the stepped surfaces of the end faces, so that the drooping lumber joint portion due to construction errors in various places and variations in the length of the hanging lumber Deviation can be prevented only by abutting the stepped surfaces of the end faces, and workability can be improved. Moreover, since the shift suppression part does not engage with the rafter support material, the rafter can be finely adjusted in the longitudinal direction, and construction can be performed while adjusting the eaves of the eaves.

  According to the joint structure of the hanging wood according to the present invention, the end of the hanging wood forms a slit dug in the longitudinal direction of the hanging wood from the end surface, and the shift suppressing portion is a wedge metal fitting that suppresses the deviation of the hanging wood. Because it is formed by inserting into the slit, it is possible to prevent the shift of the hanging part of the hanging lumber due to the construction error of each place and the variation of the length of the hanging lumber by the wedge bracket, and build a highly accurate hanging lumber joint structure be able to.

  According to the hanging lumber joint structure of the present invention, the wedge bracket has a flat slit insertion portion to be inserted into the slit and a fixing portion to be fixed to one of the rafters. Insert a part of the slit insertion part into one piece of hanging wood in advance and place the fixed part on one piece of hanging wood before installing it on the wood. It is possible to easily suppress the shift of the joint portion of the hanging wood simply by inserting the portion into the other hanging wood, and to improve the workability.

  According to the roof structure of the present invention, since any one of the first to fifth hanging lumber joint structures is provided, a smooth roof is provided when constructing a large roof such as a large roof between beams or a single-flow roof. Surfaces can be built quickly.

  The method for constructing the joint of the hanging lumber according to the present invention is to form a joint portion having a displacement suppressing portion by overlapping the end surfaces of the water-side hanging wood and the water-side hanging wood placed and fixed on the rafter support material. Since the hanging wood is fixed to the underwater hanging wood, it is possible to connect the hanging wood with high precision without considering construction errors in various places, and the workability can be greatly improved.

The perspective view which shows the installation condition to the rafter support material of rafters. The top view which shows the installation condition to the rafter support material of rafters. The disassembled perspective view which shows 1st embodiment of the joint structure of drooping wood. Sectional drawing which shows 1st embodiment of the joint structure of hanging wood. The disassembled perspective view which shows 2nd embodiment of the joint structure of drooping wood. The perspective view which shows a wedge metal fitting. The perspective view which shows the condition which matches the end surface of water-side drooping wood and the end surface of water-side drooping wood. Sectional drawing which shows the installation condition to the hanging lumber of a wedge metal fitting. FIG. 6 is another cross-sectional view showing the installation state of the wedge bracket on the hanging wood. Sectional drawing which shows the joint structure of the conventional hanging wood.

  Hereinafter, the best embodiment of the hanging wood joint structure 1 will be described with reference to the drawings. The hanging wood joint structure of the present invention can be used mainly for wooden roofs.

[First Embodiment]
As shown in FIGS. 1 and 2, the hanging lumber joint structure 1 is formed by arranging a plurality of long hanging lumbers 2 which are inclined along the roof gradient and arranged in a row in the longitudinal direction of the hanging lumber 2. A rafter support 2 that supports the rafter 2 and is orthogonal to the rafter 2 in plan view, and a long rafter 2 that is mounted on the rafter support 3. It has. Moreover, the hanging lumber 2 can form the joint part 4 by overlapping the end surfaces 2b formed on the end part 2a.

  As shown in FIG. 1, the hanging lumber 2 is a long, rectangular member that is inclined along the roof slope, and is made of wood. The suspended timber 2 is composed of a water-side suspended timber 21 installed on the water side of the roof slope and a water-side suspended timber 22 installed on the water side of the roof slope. The joint portion 4 can be formed by combining the end surface 2b of the upper side and the end surface 2b of the water-side drooping wood 22 with each other. In addition, although not shown in figure, the base plate which is a roof base material can be mounted in the upper part of the hanging lumber 2. FIG.

  As shown in FIG. 3, the end surface 2 b is a first side surface 2 c that faces the rafter base material 3 of the water-side drooping wood 21 and the water-side drooping wood 22 and a second side surface that is the surface opposite to the first side surface 2 c. An inclined surface 23 that is inclined with respect to 2d, and a step surface 24 that forms a step on the end surface 2b across the substantially central portion in the longitudinal direction of the end surface 2b are provided. The step surface 24 is formed parallel to the first side surface 2c and the second side surface 2d, and when the end surface 2b of the water-side drooping wood 21 and the end surface 2b of the water-side drooping wood 22 are overlapped, the step surfaces of each other 24 is provided on the end surface 2b so that 24 may engage. The end surface 2b having such a shape is such that the end surface 2b of the water-side suspended wood 21 is positioned below the end surface 2b of the water-side suspended wood 22 when the water-side suspended wood 21 and the water-side suspended wood 22 are combined. So that it is precut at the factory in advance. The step surface 24 has a predetermined angle with respect to the inclined surface 23.

  As shown in FIGS. 1 and 2, the rafter support member 3 is a long section rectangular member that is orthogonal to the rafter lumber 2 and supports the rafter lumber 2 in a plan view, and spans a pillar or shed bundle (not shown). Horizontal materials such as eaves girders, purlins, rafters and purlins. As shown in FIG. 1, a rafter stand 31 for receiving the rafter lumber 2 is provided on a portion of the rafter support material 3 on which the rafter lumber 2 is placed, and a cross-sectional view is provided for each portion that contacts the rafter lumber 2. A triangular notch 32 is formed.

  Next, a method for constructing a hanging lumber joint using the hanging lumber joint structure 1 will be described. As shown in FIG. 1, a plurality of rafter support members 3 are spanned on pillars and shed bundles (not shown), arranged so as to be orthogonal to the roof gradient in plan view, and have a height difference along the roof gradient. While forming, they are arranged parallel to each other. The rafter support 3 located on the most water side is an eaves girder 33, and the rafter support 3 located on the most water is a purlin 34. A plurality of rafter support members 3 arranged in parallel with the eaves girder 33 and the purlin 34 are the main building 35. In addition, arrangement | positioning of the rafter support material 3 in FIG. 1 shows an example, and the kind and shape of each rafter support material 3 and the number of purlins 35 are not specifically limited.

  The underwater drooping timber 21 is installed on the rafter support 3 spanned in this way. First, as shown in FIG.1 and FIG.3, the water-side drooping timber 21 is fitted to the notch 32 of each rafter support material 3, and the movement of the water-side drooping timber 21 in the width direction is prevented. Then, as shown in FIG. 2, the tip of the underwater hanging lumber 21 protruding from the eaves girder 33 in the wife direction is arranged in such a manner that the underwater hanging lumber 21 is arranged in a straight line in plan view. Align the eaves of the eaves while absorbing the construction error. And as shown in FIG. 3, the edge part 2a by the side which forms the joint part 4 of the underwater drooping timber 21 is fixed to the main building 35 with the elongate screw 5. As shown in FIG.

  Subsequently, as shown in FIG. 3, the water-side suspended wood 22 is joined to the water-side suspended wood 21. At this time, as described above, the end surface 2b of the water-side drooping timber 21 is formed so as to be on the lower side with respect to the end surface 2b of the water-side drooping timber 22; Can be installed. When the end surfaces 2b are overlapped with each other, the step surface 24 of the water-side drooping timber 21 and the step surface 24 of the water-side drooping timber 22 are abutted to form the deviation suppressing portion 6 as shown in FIG. The joint 4 is completed.

  Then, as shown in FIG. 3, a nail 51 is struck in the second side surface 2 d of the water-side suspended wood 22 at a position close to the water-side suspended wood 21, and the water-side suspended wood 22 is fixed to the water-side suspended wood 21. To do. Finally, the nail 51 is struck at a position close to the notch 32 of the third side surface 2e and the fourth side surface 2f perpendicular to the second side surface 2d of the water-side drooping wood 21 to complete the joint structure 1 of the hanging wood.

  As shown in FIG. 4, a gap L <b> 1 is formed in the joint portion 4 due to construction errors that occur in various places and variations in the length of the hanging lumber 2 itself, as in the prior art, and further, the first side surface 2 c and the second side surface. A force X that is orthogonal to 2d and tries to shift the suspended woods 2 acts. At this time, since the displacement suppression unit 6 is formed orthogonal to the direction in which the force X acts, the displacement suppression unit 6 is subjected to a stress Y that opposes the force X, so Deviation can be prevented. Therefore, the deviation L2 between the hanging lumbers 2 can be accommodated within the range of processing accuracy of each pre-cut end face 2b, and can be greatly reduced as compared with the conventional deviation Lb.

The joint structure 1 of the hanging wood formed in this way can construct the joint portion 4 with high accuracy only by abutting the step surface 24 formed on the end surface 2b, and can improve the workability.
[Second Embodiment]

  Next, an embodiment of the hanging wood joint structure 7 will be described with reference to the drawings. Since the second embodiment is the same as the first embodiment except that the configuration of the deviation suppressing unit is different from the first embodiment, the same reference numerals are given to the same configurations as the first embodiment. Therefore, the description is omitted.

  As shown in FIGS. 5 and 9, the end portion 2 a forms a slit 25 dug in the longitudinal direction of the hanging wood 2 from the end surface 2 b. The slit 25 is provided so as to cross substantially the center in the longitudinal direction of the end surface 2b, and is formed to be parallel to the first side surface 2c and the second side surface 2d. Moreover, the slit 25 is formed in the hanging wood 2 so that when the joint portion 8 is formed, the edges of the slits 25 of the end surface 2b coincide with each other.

  As shown in FIG. 5, the end surface 2 b is inclined with respect to the first side surface 2 c and the second side surface 2 d, and is divided by the edge of the slit 25. The end surface 2b having such a shape is such that the end surface 2b of the water-side drooping wood 21 is located below the end surface 2b of the water-side drooping wood 22 when the water-side drooping wood 21 and the water-side drooping wood 22 are joined. Pre-cut processing at the factory in advance.

  The wedge fitting 9 can be inserted into the slit 25. As shown in FIG. 6, the wedge fitting 9 is a flat slit insertion portion 9 a to be inserted into the slit 25, and a fixing portion that is formed by bending one end of the slit insertion portion 9 a and is fixed to one suspended lumber 2. This is an L-shaped fitting having 9b. The fixing portion 9b is formed with a central portion of a through hole 91 into which a nail for fixing the wedge metal fitting 9 to the hanging wood 2 is inserted.

  Next, a method for constructing a hanging wood joint using the hanging wood joint structure 7 will be described. First, the wedge fitting 9 is installed on the water-side hanging wood 21. As shown in FIG. 5, the slit insertion portion 9a of the wedge metal 9 is inserted into the slit 25 of the water-side hanging wood 21 from the width direction of the hanging wood 2, and as shown in FIG. 8, the fixing portion 9b is the third side surface 2e. The wedge metal fitting 9 is inserted until it comes into contact with. Then, the nail 52 is inserted into the insertion hole 91 of the fixing portion 9 b and driven into the water-side drooping wood 21, and the wedge bracket 9 is fixed to the water-side dripping wood 21. At this time, as shown in FIG. 7, the slit insertion portion 9 a is in a state in which the slit insertion portion 9 a is inserted into the slit 25 of the drooping wood 21 up to the approximate center in the width direction.

  Subsequently, after fixing the water-side drooping timber 21 to the rafter support material 3 in the same procedure as described in the first embodiment, the water-side drooping timber 22 is joined to the water-side drooping timber 21. At this time, as shown in FIG. 7, the exposed slit insertion portion 9 a is inserted into the slit 25 of the water-side drooping wood 22, thereby forming the displacement suppressing portion 10 shown in FIG. 9 and completing the joint portion 8. Let Finally, the water-side suspended wood 22 is fixed to the water-side suspended wood 21 in the same procedure as described in the first embodiment, and the water-side suspended wood 21 is fixed to the rafter support 3 and suspended. A wood joint structure 7 is completed.

  As shown in FIG. 9, the joint 8 is formed with a gap L3 due to construction errors occurring in various places and variations in the length of the hanging lumber 2 itself as in the prior art, and further, the first side surface 2c and the second side surface. A force X that is orthogonal to 2d and tries to shift the suspended woods 2 acts. At this time, since the wedge bracket 9 of the displacement suppressing portion 10 is inserted so as to be orthogonal to the direction in which the force X acts, the wedge bracket 9 acts as a wedge and opposes the force X, so The shift between the two can be prevented. Therefore, the deviation L4 between the hanging lumbers 2 can be within the range of the processing accuracy of the pre-cut slit 25, and can be significantly reduced as compared with the conventional deviation Lb.

  In this way, by previously installing the wedge bracket 9 on the water-side drooping wood 21, when the drooping wood 2 is joined together, it is only necessary to insert the slit 25 of the water-side drooping wood 22 into the slit insertion portion 9a. The shift between the two can be prevented. Therefore, when joining the hanging timbers 2, the construction can be performed without considering the shift between the hanging timbers 2, so that the workability can be greatly improved. Further, here, the wedge bracket 9 is pre-installed on the water-side drooping timber 21, but there is no particular limitation, and the wedge bracket 9 may be pre-installed on the water-side drooping timber 22 depending on the situation. .

  Here, the shape of the wedge metal fitting 9 is L-shaped, but the shape is not particularly limited as long as the function described above is satisfied. Moreover, the wedge metal 9 can prevent the gap between the hanging lumbers 2 even if the fixing portion 9b is omitted. Therefore, when the wedge metal fitting 9 is not preset on the hanging wood 2, it is only necessary to insert the flat slit-like insertion portion 9 a without the fixing portion 9 b into the slit 25.

  If the joint structure of the hanging timber as described above is used, a highly accurate roof structure can be constructed even in a situation where construction errors of the entire building are aggregated. That is, the shift between the hanging lumbers 2 is not affected by the construction error of each place generated according to the situation on the site as in the past, but can be accommodated within the processing accuracy of the pre-cut hanging lumber 2. Therefore, it becomes possible to control the shift between the hanging lumbers 2 by the design dimension. Therefore, even when constructing large roofs such as large roofs between beams or single-flow roofs, the workability at the site can be greatly improved, and smooth surfaces without unevenness or rattling can be obtained. The roof surface can be built quickly.

  Needless to say, the embodiment of the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the scope of the idea of the present invention.

  The floor structure according to the present invention can be suitably used for a building having a wooden roof structure, for example.

1 and 7 Joint structure of hanging wood 2 Hanging wood 21 Water-side hanging wood 22 Water-side hanging wood 2a End portion 2b End surface 2c First side surface 2d Second side surface 25 Slit 3 Rafter support material 4, 8 Joint portion 6, 10 Shift Suppression part 9 Wedge fitting 9a Slit insertion part 9b Fixing part

Joint structure of the first rafters of the present invention, a long rafters between which a plurality arranged in a line in the inclination direction along the roof slope, a phase opposite ends adjacent to each other in the longitudinal direction of the rafters A joint structure of rafters to be joined together , and a plurality of rafter supports formed of horizontal members such as eaves girders, purlins, rafters and purlins constituting the roof gradient, and mounted on the rafter supports A long span of suspended wood, and a joint formed by overlapping the end surfaces formed on the end of the suspended wood, the construction error of the entire building and the length of the suspended wood It has the shift | offset | difference suppression part for suppressing the shift | offset | difference of the upper surfaces of drooping wood produced by the dispersion | variation of .

The joint structure of the second hanging wood according to the present invention is characterized in that the deviation suppressing portion is formed in parallel to the lower surface and the upper surface of the hanging wood .

The method for constructing a hanging lumber according to the present invention is a method for constructing a hanging lumber that uses the hanging lumber joint structure according to any one of the first to fifth aspects to connect the hanging lumbers to each other. the plurality of the rafter support to, is arranged to be orthogonal in plan view with respect to the roof slope and the rafters, and are parallel to each other while forming a height difference along the roof slope, the The drooping side lumber located on the drooping side of the rafters arranged along the roof gradient is placed on the rafter support material and fixed with screws , and the drooping wood arranged along the roof gradient. of located water side facing down Underwater side end face of the water side rafters, with the Underwater side suppressing misregistration suppression unit deviation of the rafters together with water-side end face and a phase opposite mating of the rafters after forming the joint portion, of the water-side rafters Hit the nail at a position adjacent to the Underwater side rafters surface, it is characterized by fixing the water-side rafters in the Underwater side rafters.

According to the joint structure of the rafters of the present invention, shift suppressing portion is so formed in parallel to the upper surface located on the lower surface and the lower surface of the opposite side facing the rafter support the rafters, lower and upper surfaces along the roof slope It is possible to effectively resist the force of shifting the hanging lumber acting perpendicularly to the vertical, and it is possible to construct a highly precise hanging lumber joint structure by preventing displacement of the hanging lumber joint. .

As shown in FIG. 3, the end surface 2b is inclined with respect to the lower surface 2c facing the rafter base material 3 and the upper surface 2d on the opposite side of the lower surface 2c. And a stepped surface 24 that crosses a substantially central portion in the longitudinal direction of the end surface 2b and forms a step on the end surface 2b. The step surface 24 is formed in parallel with the lower surface 2c and the upper surface 2d, and when the end surface 2b of the water-side drooping wood 21 and the end surface 2b of the water-side drooping wood 22 are overlapped, the step surfaces 24 are related to each other. It is provided on the end face 2b so as to match. The end surface 2b having such a shape is such that the end surface 2b of the water-side suspended wood 21 is positioned below the end surface 2b of the water-side suspended wood 22 when the water-side suspended wood 21 and the water-side suspended wood 22 are combined. So that it is precut at the factory in advance. The step surface 24 has a predetermined angle with respect to the inclined surface 23.

Then, as shown in FIG. 3, a nail 51 is struck on the upper surface 2 d of the water-side suspended wood 22 at a position close to the water-side suspended wood 21 to fix the water-side suspended wood 22 to the water-side suspended wood 21. Finally, a nail 51 is struck at a position close to the notch 32 of the third side surface 2e and the fourth side surface 2f perpendicular to the upper surface 2d of the water-side drooping wood 21 to complete the hanging wood joint structure 1.

As shown in FIG. 4, a gap L1 is formed in the joint portion 4 due to construction errors that occur in various places and variations in the length of the hanging lumber 2 itself as in the prior art, and further, with respect to the lower surface 2c and the upper surface 2d. A force X that is perpendicular to each other and tries to shift the suspended woods 2 acts. At this time, since the displacement suppression unit 6 is formed orthogonal to the direction in which the force X acts, the displacement suppression unit 6 is subjected to a stress Y that opposes the force X, so Deviation can be prevented. Therefore, the deviation L2 between the hanging lumbers 2 can be accommodated within the range of processing accuracy of each pre-cut end face 2b, and can be greatly reduced as compared with the conventional deviation Lb.

As shown in FIGS. 5 and 9, the end portion 2 a forms a slit 25 dug in the longitudinal direction of the hanging wood 2 from the end surface 2 b. The slit 25 is provided so as to cross substantially the center in the longitudinal direction of the end surface 2b, and is formed to be parallel to the lower surface 2c and the upper surface 2d. Moreover, the slit 25 is formed in the hanging wood 2 so that when the joint portion 8 is formed, the edges of the slits 25 of the end surface 2b coincide with each other.

As shown in FIG. 5, the end surface 2 b is inclined with respect to the lower surface 2 c and the upper surface 2 d and is divided by the edge of the slit 25. The end surface 2b having such a shape is such that the end surface 2b of the water-side drooping wood 21 is located below the end surface 2b of the water-side drooping wood 22 when the water-side drooping wood 21 and the water-side drooping wood 22 are joined. Pre-cut processing at the factory in advance.

As shown in FIG. 9, a gap L3 is formed in the joint portion 8 due to construction errors occurring in various places and variations in the length of the hanging lumber 2 itself as in the prior art, and further, with respect to the lower surface 2c and the upper surface 2d. A force X that is perpendicular to each other and tries to shift the suspended woods 2 acts. At this time, since the wedge bracket 9 of the displacement suppressing portion 10 is inserted so as to be orthogonal to the direction in which the force X acts, the wedge bracket 9 acts as a wedge and opposes the force X, so The shift between the two can be prevented. Therefore, the deviation L4 between the hanging lumbers 2 can be within the range of the processing accuracy of the pre-cut slit 25, and can be significantly reduced as compared with the conventional deviation Lb.

DESCRIPTION OF SYMBOLS 1, 7 Joint structure of hanging wood 2 Hanging wood 21 Water-side hanging wood 22 Water-side hanging wood 2a End portion 2b End surface 2c Lower surface 2d Upper surface 25 Slit 3 Rafter support material 4, 8 Joint portion 6, 10 Misalignment suppression portion 9 Wedge Bracket 9a Slit insertion part 9b Fixed part

Claims (7)

It is a joint structure of drooping timber that connects a plurality of long sloping timbers that are inclined along the roof gradient and are adjacent to each other in the longitudinal direction of the dripping timber,
A plurality of rafter support members that support the rafters and are orthogonal to the rafters in plan view;
The long lumber mounted on the rafter support material, and
The joint structure of the hanging lumber characterized in that the joint formed by overlapping the end surfaces formed on the end of the hanging lumber has a shift suppressing portion for suppressing the shift of the hanging lumber. .   The said shift suppression part is formed in parallel with the 1st side surface which faces the said rafter support material of the said rafter lumber, and the 2nd side surface located on the opposite side of this 1st side surface. The joint structure of hanging wood. The end surface has a step surface that forms a step on the end surface;
The joint structure according to claim 1 or 2, wherein the deviation suppressing portion is formed by abutting the stepped surfaces of the end faces. The end portion forms a slit dug in the longitudinal direction of the hanging wood from the end surface,
3. The joint structure of drooping wood according to claim 1 or 2, wherein the deviation suppressing portion is formed by inserting a wedge metal fitting that suppresses displacement of the dripping wood into the slit.   The wedge metal fitting includes a flat slit insertion portion to be inserted into the slit, and a fixing portion formed by bending one end of the slit insertion portion and fixed to the hanging lumber. Item 5. A hanging wood joint structure according to Item 4.   A roof structure comprising the hanging lumber joint structure according to any one of claims 1 to 5. It is a joint construction method of the hanging timber that connects the hanging timbers using the joint structure of the hanging timber according to claim 1,
The plurality of rafter support members that support the hanging timber are arranged so as to be orthogonal to the roof gradient and the hanging timber in plan view, and are arranged in parallel to each other while forming a height difference along the roof gradient. Has been
Water-side drooping wood located on the water-falling side of the rafters arranged along the roof gradient is placed and fixed on the rafter support material,
The shift which suppresses the shift | offset | difference of the said drooping timber by overlapping the end surface of the above water drooping timber located in the water upper side of the said drooping timber arrange | positioned along the said roof gradient, and the end surface of the said below water dripping timber. After forming the said joint part which has a control part, the said water-side hanging wood is fixed to the said water-side hanging wood, The joint construction method of the hanging wood characterized by the above-mentioned.

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