JP7710722B2 - Wooden structure design support device, wood processing device and design support program - Google Patents

Description

The present invention relates to a wooden structure design support device, wood processing device, and design support program that enable the optimal manufacturing of structural members to be used in wooden structures.

It is known that CAD is used as a design support device to design wooden structures such as wooden houses, and this design data is used to generate data (precut processing data) for precutting the structural members that make up the wooden structure. By inputting this precut processing data into a device capable of processing wood (wood processing device), the structural members required for the wooden structure can be processed in a precut factory, and wooden structures can be efficiently manufactured at the construction site. In the design support device, specification data such as the floor plan is input, and detailed specifications of each structural member, such as the material width and cross-sectional size of the material composition of the wooden structure, and the specifications of the joints that join the structural members, are set by the program and member data, making it possible to reduce the burden on workers performing the design work (see, for example, Patent Document 1).

JP 2016-001368 A

However, there may still be room for improvement in the configuration of design support devices for setting the shapes of joints, such as joints and joints that join multiple structural members in wooden structures.

The present invention has been made to solve the above-mentioned problems, and aims to provide a wooden structure design support device, wood processing device, and design support program that enable the optimal manufacturing of structural members to be used in wooden structures.

In order to achieve this object, the wooden structure design support device according to claim 1 comprises:
A wooden structure design support device that can be used to design wooden structures,
a joint shape setting means for setting a shape of a joint that joins one structural member and another structural member that constitute the wooden structure;
a processing data generating means for generating processing data for a structural member including the shape data of the joint set by the joint shape setting means,
the joint shape setting means is capable of setting, as a shape of the joint, a shape corresponding to a concave portion formed in a concave shape on a first structural member and a convex portion formed in a second structural member joinable to the first structural member and capable of being fitted into the concave portion,
The concave portion includes a portion that is smaller on a side closer to the outer surface than on a back side of the concave portion,
The convex portion includes a portion that is larger on a side closer to a tip end than on a base end side of the convex portion,
the processing data generating means is configured to generate processing data in which a predetermined first length that is shorter than a length required for the wooden structure is set as a length dimension of the second structural member;
the joint shape setting means is capable of setting shape data of the joint in which shape data of at least one of the concave portion and the convex portion is different from shape data of the joint in a case where the first length is set as the length dimension of the second structural member and a predetermined second length is set in which the length dimension of the second structural member is not shortened from the first length,
When the first length is set as the length dimension of the second structural member, shape data is set that has a larger allowable length that allows a position in the length direction of the second structural member where the second structural member can be fitted into the first structural member, compared to when the second length is set as the length dimension of the second structural member.

According to the wooden structure design support device described in claim 1, when a first length is set as the length dimension of the second structural member, shape data of the joint is set in which the shape data of at least one of the concave and convex portions is different from that in the case where a second length that is not shorter than the first length is set. And when the first length is set as the length dimension of the second structural member, shape data is set in which the allowable length (hereinafter also referred to as the "allowable fitting length") that allows a position in which the second structural member can be fitted into the first structural member in the longitudinal direction of the second structural member is larger than that in the case where the second length is set.

Because the first length of the second structural member is a shorter length dimension than when the second length is set, the second structural member is basically manufactured to be shorter than the reference length dimension. For this reason, when a large wooden structure is manufactured and multiple second structural members are arranged in succession in a predetermined direction, even if many of the second structural members are manufactured to be larger than the allowable size, the overall size can be kept within a certain range.

In addition, when the first length is set, even if the second structural member is manufactured to a length that matches the first length, or even if the second structural member is manufactured to a length that is longer and close to the second length, by setting shape data with a large fitting allowable length, each structural member can be positioned close to the design value when the first structural member is fitted into the second structural member. Therefore, even in the case of large wooden structures, or wooden structures in which a large number of joints such as joints and joints are lined up in a certain direction, and variations accumulate to cause large dimensional errors, it is easy to manufacture wooden structures to a size close to the design value.

In the description of claim 1, the shape data of the joint where at least one of the concave and convex portions has different shape data may be different only for the concave portion or only for the convex portion, and the structural member may be different only for the first structural member having a concave portion or only for the second structural member having a convex portion. The shape data of the joint where the shape data is different may be different in either the size or shape of at least a part (e.g., a dovetail) of the concave portion and the convex portion provided in the portion corresponding to the effective length of the structural member having a certain cross-sectional shape, or may be different in both size and shape.

In addition, in the description of claim 1, the length dimension of the second structural member may be the effective length excluding the shape of the joint or joint. For example, when a joint (e.g., a large-in dovetail joint) is provided at the end, the length dimension between the joints (joint length) formed by a substantially constant cross-sectional shape is exemplified, and when a joint (e.g., a hip joint) is provided at the end, the length dimension excluding the protruding portion provided to function as a joint is exemplified.

The wooden structure design support device of claim 2 is the wooden structure design support device of claim 1, characterized in that it is provided with a judgment means for judging whether the second structural member is a structural member for which a predetermined shortening condition is satisfied, the first length is set for the second structural member judged by the judgment means to be a structural member for which the predetermined shortening condition is satisfied, and processing data for the first structural member and the second structural member is generated by the processing data generation means using shape data of the joint corresponding to the first length.

According to the wooden structure design support device described in claim 2, it is possible to easily determine whether a structural member satisfies a predetermined shortening condition using a determination means, so that it is easy to set the first length and the processing data corresponding to the first length for many structural members that require the setting of the first length.

The wooden structure design support device according to claim 3 is characterized in that, in the wooden structure design support device according to claim 1 or 2, it is provided with a joint shape identification information output means capable of outputting joint shape identification information capable of identifying whether processing data for the first structural member and the second structural member was generated using the shape data of the joint corresponding to the first length, in correspondence with at least one of the processing data for the first structural member and the second structural member.

According to the wooden structure design support device described in claim 3, it is possible to identify the first or second structural member corresponding to the first length in a wood processing device (e.g., a control device constituting a part of the wood processing device), and it is possible to further change the first length during processing of the structural member, or to cancel the change to the first length. In addition, since it is easy to identify that the structural member corresponds to the first length on the wood processing device side, it is possible to print on the structural member itself that it is a structural member corresponding to the first length. Therefore, it is easy to identify that the structural member corresponds to the first length at the construction site, and it is easy to carry out work in each process after the precut processing data is generated by identifying that the structural member corresponds to the first length.

The wood processing device described in claim 4 is characterized in that it is configured to be capable of manufacturing the first structural member and the second structural member including the joint portion corresponding to the first length by cutting the processing material based on processing data generated by the wooden structure design support device described in any one of claims 1 to 3.

The control means for controlling the wood processing device described in claim 4 may be configured to include a modification means capable of modifying the shape data of the joint set by the wooden structure design support device (e.g., the allowable fitting length) and the first length or the second length (e.g., the trunk length). By including this modification means, it is possible to easily take measures such as modifying the joint previously set by the wooden structure design support device as necessary during the processing stage by the wood processing device.

The design support program described in claim 5 is characterized in that it is configured to enable a computer to function as a wooden structure design support device described in any one of claims 1 to 3.

The present invention has the advantage of being able to provide a wooden structure design support device, wood processing device, and design support program that enable the optimal manufacturing of structural members to be used in wooden structures.

FIG. 1A is a schematic diagram showing an example of a precut processing system of the present invention, and FIG. 1B is a block diagram of a precut factory PC. FIG. 1A is a schematic diagram of an example of a design drawing, and FIG. 1B is a perspective view showing an example of a joint shape. 1A and 1B are diagrams illustrating examples of the shapes of each structural member when two structural members are joined together, in which (A) is a schematic diagram when a structural member of a standard length is used, (B) is a schematic diagram when a structural member of a shortened length is used, and (C) is a schematic diagram showing a case where the structural member of the shortened length is manufactured to be long. Flowchart showing the process of the joint shape setting program on the PC in the precut factory

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1(A) is a schematic diagram showing the configuration of a precut processing system 10 of the present invention, and FIG. 1(B) is a block diagram of a precut factory PC 20.

The precut processing system 10 is a system that uses precut processing to design wooden structures and can manufacture the structural members (components) that make up the wooden structures, and is configured to be able to apply precut processing to a variety of wooden structures, including large wooden structures. Specifically, the precut processing system 10 is configured to be able to set the length dimension of a structural member having a joint that joins two structural members between a standard length and a shortened length depending on the situation in which the structural member is used, and when the shortened length is set, the shape of the joint is made different from the standard length shape, thereby increasing the allowable length that allows the position in which the structural member can be fitted.

As shown in FIG. 1(A), the precut processing system 10 is configured to include a precut factory PC 20 and a precut processing device 30. In the precut factory PC 20, a joint shape setting program 21a and a precut processing data generation program 21b are stored (recorded) as the control program 21, and standard joint shape data 22a and shortened joint shape data 22b are stored as the member data 22. The joint shape setting program 21a in the precut factory PC 20 sets the shape of the joint using the standard joint shape data 22a when the standard length is set as the length dimension of the structural member, and sets the shape of the joint using the shortened joint shape data 22b when the shortened length is set. This makes it possible to set precut processing data that can manufacture structural members having different joint shapes when the standard length is set as the length dimension of the structural member and when the shortened length is set.

The precut processing data generation program 21b is a program that generates precut processing data corresponding to the shape data of each structural member set by the operator's input operation. The precut processing data includes data on the external shape including the details of the structural member, and member information including the placement position and type of the structural member. The precut factory PC 20 of this embodiment sets the length dimension of the structural member and sets the shape of the joint corresponding to the length dimension, and the precut processing data that is output can be output by the same processing as in the past. Therefore, the precut processing data generation program 21b can be configured in the same way as a program that generates conventional precut processing data, and a detailed description will be omitted.

In the following, we will first provide an overview of the precut processing system 10 with reference to Figure 1, then provide a specific example of a situation in which it is necessary to set a shortened length as the length dimension of a structural member with reference to Figure 2, and then provide a specific configuration of a structural member including joints corresponding to the standard length and shortened length, respectively, and a method for controlling the length setting with reference to Figures 3 and 4.

The precut factory PC 20 is, for example, installed in a precut factory where the precut processing device 30 is installed, and functions as a CAD (wooden structure design support device) capable of designing (drafting) wooden structures. The precut factory PC 20 stores CAD software that can be run by a computer, and this CAD software can be used to draft (create) design drawings for wooden structures. Design drawings are drawings that can be output based on design data that can generate the precut processing data required to manufacture wooden structures. Examples of design data include three-dimensional data in which structural members are arranged in a three-dimensional space, and multiple two-dimensional data that combines plan views (floor plans) and side views.

The precut factory PC 20 stores a control program 21 and component data 22 as control data for operating the CAD software by a computer. Using this control data, a worker performing design work performs drawing work by inputting input data for the wooden structure corresponding to the design specifications while displaying the design data for the wooden structure on the computer's display screen (display unit 113). When the drawing work is completed, the detailed shape of each part, such as the length and cross-sectional size (height, width, etc.) of each structural member required for the wooden structure, and the specifications of the joints and joints, are determined (selected) using the control program 21 and component data 22. When the detailed shape of the structural member is determined, precut processing data corresponding to the detailed shape is generated and output to the precut processing device 30.

The precut processing device 30 is configured to include a wood processing unit 32, which is composed of a mechanism capable of manufacturing structural members from material wood by cutting processing, and a control unit 31 capable of controlling the operation of the wood processing unit 32. The precut processing data output from the precut factory PC 20 is input to the control unit 31 of the precut processing device 30. The control unit 31 is configured with a control device such as a personal computer, and controls the operation of the drive mechanism of the wood processing unit 32 using the input precut processing data and a control program 31a (operation control program 31b). Examples of the operation control program 31b include a program for selecting the type of processing tool (drill, circular saw, cutter, etc.) required to manufacture each shape of the structural member and attaching the selected processing tool to the drive part, a program related to the movement operation for moving to the required processing position for the material wood, and a program corresponding to the drive operation for rotating the processing tool. By controlling the operation of the wood processing unit 32 by this control unit 31, the precut processing device 30 can manufacture structural members of shapes corresponding to the precut processing data.

The control unit 31 stores a joint shape change program 31c as part of the control program 31a. The joint shape change program 31c is a program that allows the shape of the joint set by the precut factory PC 20 to be changed, and will be described in detail later.

Next, an example of the configuration of a precut factory PC 20 that functions as a CAD will be described with reference to FIG. 1(B). As shown in FIG. 1(B), the precut factory PC 20 is configured, for example, with a housing 101 as the main body, which contains a CPU 102 as an arithmetic processing device, a RAM 103 for temporarily storing calculation data, a ROM 104, a hard disk drive (HDD 105) as an auxiliary storage device, an input/output interface (I/O 106), etc., all of which are connected by a bus line. The HDD 105 stores a control program 21 including CAD software, and various component data 22.

The precut factory PC 20 is also configured to include an input/output device 111 capable of sending and receiving data, an operation unit 112 such as a keyboard or mouse, and a display unit 113 such as an LCD display. Using the input/output device 111 of the precut factory PC 20, a worker can, for example, input design data (e.g., data in DXF format) that is the basis of design drawings through a portable storage device (e.g., USB memory) socket, or output precut processing data to the precut processing device 30 through a communication device that can be connected to a wired or wireless network.

Next, referring to FIG. 2, a specific example of a situation in which a shortened length needs to be set as the length dimension of a structural member will be described. FIG. 2(A) is a schematic diagram showing an example of a design drawing, and FIG. 2(B) is a perspective view showing an example of a joint shape. As shown in FIG. 2(A), a wooden structure 40 is formed by joining the ends of multiple structural members 41 to other structural members 41. The number of jointed parts (joints) of the structural members 41 tends to increase as the size of the wooden structure 40 increases, and also varies depending on the layout and use of the wooden structure 40. The joints of the structural members 41 can be broadly divided into joints 42 that join other structural members 41 so as to cross the direction in which one structural member 41 continues, and joints 43 that join other structural members 41 along the direction in which one structural member 41 continues. The wooden structure 40 shown in Figure 2 (A) is exemplified as a large wooden structure 40 that includes many structural members 41 arranged (connected) with many joints 42 in a predetermined direction (the horizontal direction in Figure 2 (A)).

Figure 2 (B) illustrates the shape of a joint 42 as an example of a joint, specifically, the shape of a large dovetail joint. The joint 42 is a portion provided in a part of the structural member 41 (male member 51 as the second structural member) that fits together from above, and a part of the structural member 41 (female member 52 as the first structural member) located below. A convex portion 61 formed in a convex shape is provided at the end of the male member 51, and a concave portion 62 formed in a concave shape into which the convex portion 61 can be fitted is provided at a part of the female member 52.

The convex portion 61 of the large-inset dovetail joint is comprised of a dovetail portion 61a and a seat portion 61b, and as shown in FIG. 2(B), the dovetail portion 61a is comprised of a portion that is larger on the side closer to the tip than on the base end side of the convex portion 61 of the male material 51. The seat portion 61b is located on the base side (base end side) farther from the tip of the convex portion 61 than the dovetail portion 61a, and is comprised of a portion that is larger in external shape than the dovetail portion 61a and is formed to a constant cross-sectional size.

A concave portion 62 is formed in the female member 52 so that it has a concave shape corresponding to the dovetail portion 61a and the seat portion 61b. The concave portion 62 is configured to include a concave portion that is smaller on the side closer to the outer surface 62a than on the back side of the concave portion and can fit the dovetail portion 61a. By forming the concave portion 62 and the convex portion 61 in this way, the male member 51 and the female member 52 as the two structural members 41 can be joined at right angles.

2(B) shows an example in which a notched portion 62b is formed on the outer surface 62a of the female material 52 by notching out the outer surface 62a. The reference surface (reference surface 61c) at the base side of the convex portion 61 of the male material 51 is positioned one step further inward than the outer surface 62a of the female material 52 relative to the inner surface formed by the notched portion 62b. By providing the notched portion 62b in this way, even if the width dimension of the female material 52 varies slightly for each piece of wood material before cutting, the reference surface 61c of the male material 51 can be positioned at an appropriate position relative to the width center of the female material 52, and the seat portion 61b can be reliably supported by the concave portion 62.

Here, a large-sized dovetail joint is shown as an example of a joint in FIG. 2(B), but various shapes can be used for joints used in wooden structures 40. These various joints can be broadly classified into joints (e.g., large-sized dovetail joints) that have a structure (hereinafter also referred to as a "positioning structure") that restricts the movement of the male member 51 in the direction away from the female member 52 by forming the convex portion 61 of the male member 51 that can be fitted into the concave portion 62 of the female member 52 larger on the side closer to the tip than on the base end, like the dovetail portion 61a, and joints (e.g., large-sized joints) that do not have a positioning structure. In wooden structures, from the viewpoint of strength after construction, many joints with positioning structures are used for joints of horizontally continuous foundations, beams, cross members, etc., and in addition to the large-sized dovetail joints, dovetail joints without a seat portion 61b are used as joints 42, and dovetail joints and sickle joints are used as joints 43.

A joint with a positioning structure determines the relative positions of multiple structural members 41 after assembly, and therefore is likely to affect the overall size (length) of a wooden structure, and is one factor that causes the actual size to vary from the design value. For this reason, if a slight deviation in the relative position of a structural member 41 occurs at one joint, even if the deviation is not a problem for a small wooden structure, in the case of a wooden structure with multiple joints in one direction (for example, the left and right direction in Figure 2 (A)), the length (size) of the structure assembled at the construction site may end up being significantly larger than the design value.

If the actual dimensions of a wooden structure differ significantly from the design values, it may not be possible to place each structural member 41 in the appropriate position on the foundation made of reinforced concrete or the like, and serious problems may occur, such as parts of the structural members 41 protruding outside the foundation. For this reason, with some wooden structures, such as large wooden structures 40, it may be difficult to carry out all of the cutting of the structural members 41 of the wooden structure at a precut factory, and it may be necessary to manufacture the wooden structure by cutting joints and other parts at the construction site so that the lengths match.

In contrast, in the precut processing system 10 of this embodiment, for some structural members 41 constituting a large wooden structure 40, etc., a shortened length shorter than the standard length corresponding to the designed size can be set, and when this shortened length is set, a shape different from the standard shape is set as the shape of the joint, and the allowable length that allows the position where the structural member 41 can be fitted is configured to be large. Therefore, even if there is a possibility that the actual size of a part of the wooden structure will be larger than the designed size, by shortening the length of the structural member 41 by setting the shortened length and setting the allowable length large, the arrangement position of the structural member 41 can be adjusted depending on the fitting position of the joint, and the overall size of the wooden structure can be avoided. Therefore, even if precut processing is applied to a large wooden structure 40, such as an apartment building or a school building, which has a structural part where a large number of joints such as joints are lined up in one direction, it is easy to fit the actual size of the wooden structure to a size close to the design value. In addition, for wooden structures such as general houses, the shape of the joints can be set as usual by setting the standard length, and wooden structures can be manufactured through the same process as usual. In other words, by making it possible to set the shortened length and set a different shape for the joint in the precut processing system 10, it is possible to suitably manufacture structural members 41 for a variety of wooden structures, including large wooden structures 40, using precut processing.

Next, referring to FIG. 3, the specific configurations of a standard-length structural member 41 (male member 51) in which a convex portion 61 is set as a joint for a standard length and standard shape, and a shortened-length structural member 41 in which a convex portion 61 is set as a joint for a shortened length and a different shape will be described.

Figure 3(A) is a schematic diagram of a case where a standard-length structural member 41 (standard-length male member 51a) is used, Figure 3(B) is a schematic diagram of a case where a shortened-length structural member 41 (shortened-length male member 51b) is used, and Figure 3(C) is a schematic diagram showing a case where a shortened-length structural member 41 (shortened-length male member 51b) is manufactured to be longer.

In wooden structures, as shown in FIG. 3(A), a structure may be used in which a male material 51a (second structural member) with convex portions 61 on both ends is fitted from above (the front side in the direction perpendicular to the paper surface of FIG. 3(A)) into a female material 52 (first structural member) with concave portions 62. In structural members 41 manufactured by conventional precut processing, the length dimension of the male material 51a is set so that the position into which the male material 51a can be fitted is approximately the same as the design value, as shown in FIG. 3(A).

The length dimension of the male material 51a is based not on the tip of the convex portion 61, but on the length dimension (body length L1, hereinafter also referred to as the "effective length") between the outer surfaces (body joints) that function as the male material 51a, and the body length L1 is recorded (stored) as data in the CAD software of the precut factory PC 20. The body length L1 does not change in length even if the structure of the joint is changed (for example, if the size or length of the dovetail portion 61a changes), so data management in the design of the structural member 41 can be made easier. Note that the body length L1 does not necessarily have to be the basis for the length dimension (effective length) of the male material 51a, and another part, such as the length between the outer surfaces 62a of the female material 52, may be recorded as the basis for the CAD software data.

Here, FIG. 3(A) illustrates a case where, when the convex portion 61 of the male member 51a is fitted into the concave portion 62, the allowable fitting length in the length direction of the male member 51a (left-right direction in FIG. 3(A)) is "zero", there is no gap that allows the position of the male member 51a to be adjusted, and the male member 51a and the female member 52 are completely positioned and fixed. The allowable fitting length between the male member 51a and the female member 52 does not necessarily have to be "zero", and a certain gap (clearance) is provided between the convex portion 61 of the male member 51a and the concave portion 62 in the length direction of the male member 51a (left-right direction in FIG. 3(A)), and the convex portion 61 of the male member 51a may be configured to be movable within a certain allowable length range (for example, within a length range of 0.2 mm) relative to the concave portion 62 in the length direction of the male member 51a for assembly.

Next, the case where the shortened length is set will be described with reference to Fig. 3(B) and Fig. 3(C). In Fig. 3(A) to Fig. 3(C), a dashed line is drawn at the center of the material width of the female material 52, which is located on both ends of the male material 51 and into which the male material 51a is fitted, and the distance (separation length) between the two female materials 52 is represented as "S", and Fig. 3(A) to Fig. 3(C) show an example in which the distance S is the same.

The precut factory PC 20 has a function for selecting the number and cross-sectional size of the structural members 41, including the male members 51 and female members 52, by performing strength calculations according to the design data, and a function for determining specific specifications such as the length dimension and type of joint of the structural members 41 based on the number and cross-sectional size of the selected structural members 41. With these functions, the precut factory PC 20 is configured to be able to output precut processing data for the structural members 41 corresponding to the detailed shape that allows precut processing. In this case, conventionally, the length dimension of the structural members 41 and the cross-sectional size of the external part that is the basis of the structural members 41 (horizontal length and width of the columns, material width and material composition of the foundations, beams, cross members, etc.) were determined by performing strength calculations on the design data, and the type and size of the joint were determined as detailed specifications of the joint according to the cross-sectional size.

In contrast, the precut factory PC20 is configured so that, even if the cross-sectional size of the reference outer portion of the structural member 41 is the same, there are cases where a standard length male member 51a is set, as shown in FIG. 3(A), and cases where a shortened length male member 51b is set, with a body length L2 that is shorter than the standard length male member 51a, as shown in FIG. 3(B). When a shortened length is set, a joint shape different from that of the standard length is set.

Specifically, as shown in FIG. 3B, the shape of the dovetail 61d is set such that the size of the tip of the dovetail 61a is smaller than that of the standard length. The width (vertical length in FIG. 3B) of the root side (base end side) of the dovetail 61d is set to be narrower than the standard length dovetail 61a, and the outer shape of the dovetail 61d is set to match the shape of the part where the gap width narrows in the recessed portion 62. The convex portion 61 of the male member 51b is configured to be movable within a certain allowable length (fitting allowable length) range (for example, within a length range of 1.0 mm) in the length direction of the male member 51b relative to the recessed portion 62, and the fitting allowable length is set to a length greater than the allowable length when the standard length is set (for example, "zero"). As a result, even if the shortened length is set and the male member 51b is manufactured with a body length L3 that is longer than the body length L2 corresponding to the shortened length, the position of the female member 52 remains the same and the convex portion 61 of the male member 51b set to the shortened length can be fitted into the concave portion 62 of the female member 52 (see FIG. 3C).

Here, when the shortened length is set, it is preferable to set the fitting allowable length so that the actual dimensions of the wooden structure are close to the design value even if the male material 51b is manufactured to be longer. In this embodiment, when the shortened length (body length L2) is set, even if the male material 51b is manufactured to the same length as the standard length (body length L1) (see FIG. 3(C)), the male material 51b can be fitted into the female material 52 without making the separation length S of the two female materials 52 different. This fitting allowable length does not necessarily need to be set so that the male material 51b can be fitted into the female material 52 without making the separation length S of the female material 52 different even when the male material 51b is manufactured to the same length as the standard length. The fitting allowable length may be set shorter than in this embodiment so that the separation length S becomes longer when the male material 51b is manufactured to the standard length when the shortened length is set.

When the shortened length is set, the fitting allowable length may be set to provide a gap that corresponds not only to the case where the male member 51b is manufactured long, but also to the case where it is manufactured short. In this case, the gap that corresponds to both the case where it is manufactured long and the case where it is manufactured short may be set to be of equal size in both directions, or may be set to be unequal, with one side being set larger (for example, the gap (allowable length) is set larger for the case where it is manufactured long).

In addition, the shape of the joint when the shortened length is set has been described as a shape in which the size of the dovetail 61a is smaller (dovetail 61d) than when the standard length is set, but other shapes may be used as long as the allowable fitting length is greater than when the standard length is set. For example, when the shortened length is set, rather than simply reducing the size of the dovetail 61a, the tip side of the dovetail 61a may be made smaller while the base side may include a continuous portion of a constant width (a portion of a constant cross-sectional size) that is set to a narrow width that can fit into the smallest gap in the recessed portion 62.

In addition, when a shortened length is set for the male material 51, it is not necessary to make only the shape of the convex portion 61 different from that of the concave portion 62 and the convex portion 61. When a shortened length is set for the male material 51b, it is sufficient to set the shape of the joint in which at least one of the concave portion 62 and the convex portion 61 is different. For example, when a shortened length is set, the shape of the joint may be such that the concave portion 62 of the female material 52 is larger than when the standard length is set, thereby increasing the allowable fitting length, or both the concave portion 62 of the female material 52 and the convex portion 61 of the male material 51 are made different from the standard length to increase the allowable fitting length.

Next, referring mainly to FIG. 4, we will explain the processing of the joint shape setting program 21a, which allows the shortened length to be set for structural members in which joints are provided (hereinafter, "structural members with joints"). FIG. 4 is a flowchart showing the processing by the joint shape setting program 21a in the precut factory PC 20.

In the precut factory PC 20, the length dimension of the male material 51 (second structural member) can be set to a shortened length as well as a standard length, and when the shortened length is set, shape data with a larger fitting allowable length is set as the shape data of the joint. Specifically, the precut factory PC 20 stores standard joint shape data 22a including the shape data of the large-dovetail joint shown in FIG. 3(A) as the shape data of the joint corresponding to the standard length, and separately from this standard joint shape data 22a, shortened joint shape data 22b is stored as the shape data of the joint corresponding to the shortened length including the shape data of the large-dovetail joint shown in FIG. 3(B) (see FIG. 1). These standard joint shape data 22a and shortened joint shape data 22b may be stored in the precut factory PC 20 as numerical information, may be stored as shape data, or may be stored in combination with numerical information and shape data. In addition, the standard joint shape data 22a and the shortened joint shape data 22b may be stored as part of the program, or may be stored as readable information in a storage area separate from the program.

The joint shape setting program 21a is a program that constitutes part of the CAD software of the precut factory PC 20, and is executed after the external shape and layout of the design drawings have been input, until the precut processing data is output. For example, when an operator executes an operation to output precut processing data, the joint shape setting program 21a is executed, which determines whether or not to set a shortened length for the structural member in which a joint is to be provided (hereinafter referred to as a "structural member with joint"). If a shortened length is set, the shortened joint shape data 22b is set for the structural member with joint. The joint shape setting program 21a may be executable at other times, such as when the operator is operating the CAD software while creating the design drawings, at the time intended by the operator.

When the joint shape setting program 21a is started, as shown in FIG. 4, first, a process is executed to read the external length data of the wooden structure (S11), and it is determined whether the external length of the read wooden structure (e.g., the horizontal length along each of the two directions in which the foundations, beams, cross members, etc. are arranged at right angles) is equal to or greater than a predetermined length (e.g., 20 m) (S12).

Here, if the external length of a wooden structure is more than a certain amount, it is likely to include many joints, and as a result, the external length of the wooden structure will vary greatly due to variations in the dimensions of the structural members and the time of assembly, which may cause a misalignment between the reinforced concrete foundation and the wooden structure. In addition, if the number of structural members (e.g., beams) that are continuous in parallel on the same floor is different, the overall length will vary, and structural members (e.g., part of the beam) that should be perpendicular in a plan view may be placed at an angle. If there is a large difference in the length of beams on different floors above and below, the columns and beams that should be perpendicular in a side view may no longer be perpendicular. In these cases, by setting a shortened length for at least some of the structural members and increasing the allowable length for fitting at the joints of the structural members, the variation in the external length of the wooden structure can be absorbed at the joints. This makes it easier to bring the overall external length closer to the design value at the construction site, even if the structural members required for manufacturing a large wooden structure are manufactured at a precut factory by precut processing.

The length used as the criterion for setting the shortened length based on the external length of the wooden structure may be preset as an initial value by the manufacturer of the CAD software, based on empirical values that are considered to be good for setting the shortened length, or an input function may be added to allow construction companies using the CAD software to input and set values specific to each company.

If it is determined in the process of S12 that the external dimensions of the wooden structure are 20 m or more (S12: Y), a shortened length is set for the second structural member that corresponds to the male member among the structural members with joints (S21).

After processing in S21, shortened joint shape data 22b is set for the structural member with joint (S22). This shortened joint shape data 22b can be set by setting shortened joint shape data 22b corresponding to the shortened length for at least one of the female member 52 (first structural member) and the male member 51 (second structural member). If the shortened joint shape data 22b for both the first structural member and the second structural member is to be different from the standard length, shortened joint shape data 22b is set for both structural members.

After processing in S22, shortened joint information is added to the structural member with joints (S23). This shortened joint information functions as joint shape identification information that can identify that a shortened length has been set for the structural member, and is composed of, for example, dedicated information indicating that a shortened length has been set for the structural member. For example, as information data for the structural member indicating whether a shortened length has been set, an item corresponding to the shortened length setting is added as an item in an information table corresponding to each item including the body length, overall length, and placement position information, and the information corresponding to that item (for example, 1-bit information) is set to "0" corresponding to standard joint information for standard length, and "1" corresponding to shortened joint information for shortened length.

It is preferable that the shortened joint information is output from the precut factory PC 20 as precut processing data in a state where it is associated with the shape data and print data of the structural member. As a result, the precut processing device 30 can identify the second structural member with a shortened length set based on the shortened joint information, making it easier to carry out processing corresponding to the shortened length being set in each process after the output of the precut processing data. For example, the structural member (finished part) with a standard length set is printed with text information of "standard", and when a shortened length is set, the text information of "shortened" is printed, so that the structural member with a shortened length set at the construction site can be identified and a wooden structure can be manufactured. In addition, the shortened joint information can be added to a part of the information used conventionally. For example, the shortened joint information may be added by being included in the length information indicating the total length of the part, or it may be printed on the structural member by being added to the total length of the part. For example, for standard length, only the number corresponding to the length, such as "1800", may be printed, and for shortened length, "1800s" may be printed, making it possible to identify structural members with a shortened length by the presence or absence of the final letter "s".

The shortened joint information may be composed of two or more bits of information, not limited to one bit. For example, two or more length dimensions may be set as the shortened length, and when each shortened length is set, different information such as "1", "2", and "3" may be added depending on the degree of the shortened length, and one of the pieces of information may be output to the precut processing device 30 as the shortened joint information. This makes it easier to identify the degree of the shortened length, for example by printing different information such as "s1", "s2", and "s3" on the structural member as information indicating each shortened length.

If it is determined in the process of S12 that the external dimensions of the wooden structure are not 20 m or more (S12: N), the layout data of the structural members is read (S13) and it is determined whether the number of points where the structural members are connected by joints is a certain number or more (e.g., 10 or more) (S14).

If it is determined in the process of S14 that the number of points where structural members are connected by joints is equal to or greater than a certain number (S14: Y), the processes of S21 to S23 are executed to set the shortened length for the structural members with joints, set the shortened joint shape data 22b, add the shortened joint information, and end the process by the joint shape setting program 21a.

This process of S14 is a process that responds to the possibility that the error in the overall length will be large when the number of points at which structural members are connected by joints is large, and in this case too, a shortened length is set for the structural members that are determined to have a large number of connected points. This makes it easier to manufacture structural members that are easy to accommodate errors in the overall length using the precut processing device 30 in situations where a large number of joints are used due to the layout of a large wooden structure or other circumstances.

Here, in the process of S14, the number of points where structural members are connected by joints is determined by counting the number of joints in a specified direction (e.g., the left-right direction in FIG. 2(A)) and the number of joints in a direction intersecting the specified direction (e.g., the up-down direction in FIG. 2(A)), determining whether or not to set a shortened length for structural members arranged along each direction, and preferably carrying out processes S21 to S23 corresponding to the shortened length for structural members that satisfy the conditions of the process of S14.

If it is determined in the process of S14 that the number of structural members connected by joints is less than a certain number (S14: N), the message "Shortening of structural members with joints?" is displayed on the display screen (S15), and if the input operation by the worker selects "shortening" (S16: Y), the processes of S21 to S23 corresponding to the shortened length are carried out for the structural members specified by the worker. Through the processes of S15 and S16, settings corresponding to the shortened length can be executed for the structural members selected by the worker, even if the worker intends it to do so.

If the operator does not select "shortened length" (S16: N), a standard length corresponding to the design standard data is set for the second structural member that is the male member of the joint-equipped structural member (S17). After the process of S17, standard joint shape data 22a is set for the joint-equipped structural member (S18), and standard joint information is added to the joint-equipped structural member (S19), and the process by the joint shape setting program 21a is terminated.

In this way, according to the precut factory PC 20, when the shortened length (first length) is set as the length dimension of the male material 51, shape data of the joint is set that has different shape data of the convex portion 61 compared to when the standard length (second length) in which the length dimension of the male material 51 is not shortened beyond the shortened length is set. And when the shortened length is set as the length dimension of the male material 51, shape data is set that has a larger fitting allowable length than when the standard length is set as the length dimension of the male material 51.

The shortened length of the male material 51 is shorter than when the standard length is set, so the male material 51 is shorter than the reference length (design value). For this reason, when a large wooden structure is manufactured and many male materials 51 are arranged in succession in a predetermined direction, even if many of the male materials 51 are manufactured larger than the allowable size, the overall size can be kept within a certain range.

That is, even if the male member 51 is manufactured to a size that matches the shortened length, or even if the male member 51 is manufactured to a size larger than the shortened length, the wooden structure will not become larger by the amount of the shortened length set compared to the standard length. Also, when a large number of joints are provided, the size of the wooden structure as a whole may become too large, or the length in a specified direction may become too long. However, by making it possible to easily set the shortened length for a wooden structure with a large number of joints, it is possible to easily manufacture a wooden structure to a size close to the design value using precut processing. Therefore, it is possible to easily manufacture a wide variety of wooden structures, including large wooden structures and wooden structures in which a large number of joints are arranged in a row in a specified direction, to a size close to the design value using precut processing.

In addition, the control unit 31 of the precut processing device 30 equipped with the wood processing unit 32 can identify whether the female material 52 or male material 51 corresponds to the shortened length based on the presence or absence of shortened joint information added by the precut factory PC 20. This makes it possible to further change the shortened length during the precut processing process in the precut processing device 30, or to cancel the change to the shortened length. In addition, the precut processing device 30 can print that the member corresponds to the shortened length, making it easier to identify that the structural member corresponds to the shortened length at the construction site.

Here, as shown in FIG. 1, it is preferable that the precut processing device 30 is provided with a joint shape modification program 31c as part of the control program 31a. The joint shape modification program 31c is a program that can change and set structural members set to a standard length to a shortened length, and can be configured in the same manner as the joint shape setting program 21a provided in the precut factory PC 20. In addition, the joint shape modification program 31c is preferably configured to be able to change the structural members set to a standard length to a shortened length and change the standard joint shape data 22a to shortened joint shape data 22b, and to be able to change the standard joint information to shortened joint information.

In addition, it is preferable that the joint shape change program 31c is provided with a program corresponding to the function of returning the shortened length set in the precut factory PC 20 to the standard length, returning the shortened joint shape data 22b to the standard joint shape data 22a, and restoring the shortened joint information to the standard joint information. It is also preferable to configure it so that it is possible to change the shortened length amount for a structural member for which a shortened length is set, or to change the shortened joint shape data 22b so that the fitting allowable length in the length direction of the second structural member is increased or decreased. This allows the processing corresponding to the shortened length to be performed not only by the operator of the precut factory PC 20 but also by the operator operating the precut processing device 30, making it possible to make the system easy to manufacture structural members that correspond to the situation at the construction site of a wooden structure.

The present invention is not limited to the above embodiment, and it is easily conceivable that various improvements and modifications are possible without departing from the spirit of the present invention. For example, the present invention may be modified as described below.

In the above embodiment, a case where a shortened length is set for a structural member having a joint is described, but the shortened length is not limited to being set for a joint, and it may be possible to set a shortened length for a structural member having a joint. In other words, when a shortened length is set, the shape data for the joint may be configured to have a larger fitting allowable length that allows a position where one structural member can be fitted into the other structural member in the length direction of two structural members connected by the joint.

In the above embodiment, the same shortened length is set for each structural member, but different lengths may be set. For example, a total shortened length may be set for multiple structural members, and the shortened length for one structural member may be set by dividing the total shortened length by the number of structural members used. For example, in the case where the total number of joints 42 and joints 43 in the horizontal direction of the top row in FIG. 2(A) is "5", the total number of joints 42 and joints 43 in the horizontal direction of the middle row is "10", and the number of joints 42 in the horizontal direction of the lower row is "30", a shortened length amount of "0.5 mm" may be set for the structural member 41 having a joint in the horizontal direction of the lower row, a shortened length amount of "1.5 mm" equivalent to three times that of the lower row may be set for each structural member 41 having a joint or joint in the horizontal direction of the middle row, and a shortened length amount of "3.0 mm" equivalent to six times that of the lower row may be set for each structural member 41 having a joint or joint in the horizontal direction of the upper row, and an allowable fitting length that matches each shortened length amount may be set. This makes it possible to match the totals of the gaps (clearances) set in the upper, middle, and lower rows, and to set clearances in a balanced manner without contributing to differences in the lengths of the structural members 41. Additionally, a total shortened length may be set for each structural member located on the upper and lower layers, and the shortened length and fitting allowable length may be allocated to each structural member according to the number of joints on the upper and lower layers.

In the above embodiment, the joint shape setting program 21a performs processing corresponding to a fixed shortened length for all structural members 41 that satisfy the conditions for setting the shortened length. However, processing corresponding to multiple types of shortened lengths may be performed for structural members 41 that satisfy the conditions for setting the shortened length, or processing corresponding to shortened lengths may be performed only for some structural members 41, and processing corresponding to standard lengths may be performed for the remaining structural members 41. For example, processing corresponding to a fixed shortened length may be performed for some structural members 41 near the ends of a wooden structure, and processing corresponding to a shortened length that is shorter than the ends may be performed for the remaining structural members 41 near the center, or processing corresponding to standard lengths may be performed.

In the above embodiment, the joint shape setting program 21a is described as executing the processing corresponding to the shortened length by implementing both the condition corresponding to the size of the wooden structure (processing of S11 and S12) and the condition corresponding to the number of joints (processing of S13 and S14). However, it is not necessary to set both, and one of them may be omitted, or other conditions may be added. For example, a condition corresponding to the number of joints may be added to set the condition that the total number of joints and joints is a certain number or more in a specified direction, or a configuration may be used in which the processing corresponding to the shortened length is executed using a condition using the number of structural members having joints or joints. In addition, the processing that enables the setting of the shortened length to be executed by the operator's input operation (processing of S15 and S16) is not necessarily required and may be omitted.

As described above, this invention is suitable for a wooden structure design support device, wood processing device, and design support program that enable the optimal manufacturing of structural members to be used in wooden structures.

10: Pre-cut processing system,
20: Precut factory PC (wooden structure design support device)
21a: Joint shape setting program (part of joint shape setting means, joint shape identification information output means)
21b: Precut processing data generation program (processing data generation means)
30: Pre-cut processing equipment (wood processing equipment)
31b: Joint shape change program (change means)
40: Wooden structure 41: Structural member 51, 51a, 51b: Male member (second structural member)
52: Female member (first structural member)
61: Convex part (convex part)
62: Concave part (concave part)

Claims (5)

A wooden structure design support device that can be used to design wooden structures,
a joint shape setting means for setting a shape of a joint that joins one structural member and another structural member that constitute the wooden structure;
a processing data generating means for generating processing data for a structural member including the shape data of the joint set by the joint shape setting means,
the joint shape setting means is capable of setting, as a shape of the joint, a shape corresponding to a concave portion formed in a concave shape on a first structural member and a convex portion formed in a second structural member joinable to the first structural member and capable of being fitted into the concave portion,
The concave portion includes a portion that is smaller on a side closer to the outer surface than on a back side of the concave portion,
The convex portion includes a portion that is larger on a side closer to a tip end than on a base end side of the convex portion,
the processing data generating means is configured to generate processing data in which a predetermined first length that is shorter than a length required for the wooden structure is set as a length dimension of the second structural member;
the joint shape setting means is capable of setting shape data of the joint in which shape data of at least one of the concave portion and the convex portion is different from shape data of the joint in a case where the first length is set as the length dimension of the second structural member and a predetermined second length is set in which the length dimension of the second structural member is not shortened from the first length,
A wooden structure design support device characterized in that, when the first length is set as the length dimension of the second structural member as the shape data of the joint, shape data is set that has a larger allowable length that allows a position in the longitudinal direction of the second structural member where the second structural member can be fitted into the first structural member than when the second length is set as the length dimension of the second structural member. The wooden structure design support device of claim 1, further comprising a judgment means for judging whether the second structural member is a structural member for which a predetermined shortening condition is satisfied, the first length is set for the second structural member judged by the judgment means to be a structural member for which the predetermined shortening condition is satisfied, and processing data for the first structural member and the second structural member is generated by the processing data generation means using shape data of the joint corresponding to the first length. The wooden structure design support device according to any one of claims 1 and 2, characterized in that it is provided with a joint shape identification information output means capable of outputting joint shape identification information capable of identifying whether processing data for the first structural member and the second structural member was generated using the shape data of the joint corresponding to the first length, in correspondence with at least one of the processing data for the first structural member and the second structural member. A wood processing device that is configured to be capable of manufacturing the first structural member and the second structural member including the joint portion corresponding to the first length by cutting the processing material based on processing data generated by the wooden structure design support device described in any one of claims 1 to 3. A design support program configured to cause a computer to function as a wooden structure design support device according to any one of claims 1 to 3.