JP4594807B2 - Frame structure - Google Patents

Description

  The present invention relates to a frame structure.

  For example, lightweight and high strength structures are required for structures used for stairs and roofs. As a structure satisfying such a requirement, a frame structure constructed by connecting a plurality of frames via columnar node members called hubs is known (for example, see Patent Document 1 and Patent Document 2). ).

  In this framework structure, as shown in FIG. 13, a plurality of grooves S1 (hereinafter referred to as “connecting grooves S1”) extending from one end face to the other end face are recessed on the outer peripheral surface of the node member S. By inserting an end F1 (hereinafter referred to as “connection end F1”) of the frame F, which is provided and formed into a flat shape, into the connecting groove S1 from the end face side of the node member S, the frames F are connected to each other. It is connected. Further, a presser member W such as a washer is disposed on the end surface of the node member S so as to close the connecting groove S1 opened in the end surface of the node member S, thereby preventing the frame F from coming off.

  By the way, as shown in FIG. 14, the width of the connection end F1 ′ of the frame F ′ (hereinafter sometimes referred to as “orthogonal frame F ′”) connected so as to be orthogonal to the center line P of the node member S. The dimension is smaller than the width dimension of the connecting end portion F1 ″ of the frame F ″ (hereinafter sometimes referred to as “diagonal frame F ″”) that is connected obliquely to the center line P of the node member S. Therefore, a rectangular gap V1 is formed between the connecting end F1 ′ and the pressing member W in the connecting groove S1 (see FIG. 13) to which the orthogonal frame F ′ is connected. In the connecting groove S1 to which the orthogonal frame F ′ is connected, a groove filling member S2 (see FIG. 13) having substantially the same shape as the gap V1 is inserted, and the connecting groove S1 extends in the extending direction (vertical direction in FIG. 14). It is necessary to prevent the deviation of the orthogonal frame F1 ′.

  In the oblique frame F ″ shown in FIG. 14, both end portions of the connecting end portion F1 ″ are in contact with the pressing member W, and therefore do not shift in the extending direction of the connecting groove S1.

JP 2002-088913 A JP 2005-016041 A

  By the way, since there are an enormous number of node members S in the frame structure, the operation of inserting the groove filling member S2 (see FIG. 13) into the connecting groove S1 in each node member S requires a lot of labor and time. Is required.

  Further, even when both ends of the connection end F1 ″ abut against the presser member W as in the oblique frame F ″ of FIG. 14, depending on the shape of the connection end F1 ″, the connection end F1 ″ There may be a case where a small gap V2 having a triangular shape is formed between the pressing member W and the pressing member W. If the size of the gap V2 is as shown in the figure, there is no structural problem without inserting the groove filling member, but this small gap V2 may cause a squeaking noise. Note that if a groove filling member is inserted into the small gap V2, it is possible to suppress the generation of a squeaking noise, but since a very small groove filling member is handled, the assembly work of the frame structure is further increased. It becomes complicated.

  From such a point of view, the present invention is a frame structure constructed by connecting a plurality of frames via nodal members, and can be easily and quickly assembled, and has a squeaking sound. It is an object of the present invention to provide a frame structure that hardly occurs.

  The present invention devised to solve such problems includes a columnar node member, a plurality of frames connected to the node member, and a first pressing member provided on one end surface of the node member. The frame structure is configured to include a connection groove extending from one end surface to the other end surface of the outer peripheral surface of the nodal member, and each frame is inserted into the connection groove. An insertion portion to be inserted into the coupling groove on the contact surface with the end surface of the nodal member, and the protruding end of the insertion portion. Is in contact with the connection end of the frame.

  In this framework structure, an insertion portion that is inserted into a gap formed when the connection end portion of the frame is inserted into the connection groove of the node member is integrally provided on the contact surface of the first pressing member. Therefore, it is possible to prevent the frame from shifting in the extending direction of the connecting groove only by arranging the first pressing member on the end face of the node member. That is, since the troublesome work of inserting the groove filling member into the connecting groove is released, the assembly work of the frame structure can be performed easily and quickly. Further, in this frame structure, since the insertion portion of the first pressing member inserted into the connection groove of the node member abuts on the connection end portion of the frame and suppresses the rotation of the frame, it is difficult to generate a squeaking noise. .

  The frame structure may further include a second pressing member provided on the other end surface of the node member. In this case, a through hole extending from one end surface to the other end surface is formed in the node member, and the first press member and the second press member are inserted by inserting a bolt into the through hole. May be pressed against the end face of the node member. If it does in this way, a node member will be pinched by the 1st presser member and the 2nd presser member, and the contact surface of each presser member will stick to the end face of a node member. It becomes possible to prevent the displacement of the frame more reliably, and it is difficult to generate a stagnation sound.

  When the bolt is used to press the first presser member and the second presser member against the end surface of the node member, one of the first presser member and the second presser member has a shaft portion of the bolt. It is preferable to form a bottomed female screw hole into which the tip of the bolt is screwed on a contact surface with the end surface of the node member. If it does in this way, since the direction in which the internal thread hole is formed will function as a nut among the 1st above-mentioned presser member and the above-mentioned 2nd presser member, the number of parts around a node member can be reduced. It becomes possible. Further, since the shaft portion of the bolt does not protrude from the bottomed female screw hole, a cap (cover) etc. for covering it is not necessary.

  Further, when a bolt insertion hole through which the shaft portion of the bolt is inserted is formed in one of the first pressing member and the second pressing member, the head of the bolt is formed around the bolt insertion hole. It is good to form the recessed part in which a part is accommodated. This makes it difficult to visually recognize the head of the bolt from the outside, and it is possible to obtain a frame structure with a clean appearance without arranging a cap or the like that covers the head of the bolt.

  According to the frame structure according to the present invention, it is possible to perform the assembling work easily and quickly, and it is difficult for squeaking noise to occur.

  The best mode for carrying out the present invention will be described below in detail with reference to the accompanying drawings.

  The frame structure according to the present invention mainly constitutes a building structure such as a roof frame or a wall (planar truss structure, three-dimensional truss structure, space frame structure, etc.), but in the following embodiments, The case where the frame structure according to the present invention is used as a support girder for a staircase will be exemplified.

  As shown in FIG. 1, the framework structure H according to the present embodiment is a three-dimensional structure having a construction surface that is a warren truss, and the staircase attachment portion F1 on the lower floor and the staircase attachment on the upper floor. It is arranged with a predetermined gradient (hereinafter referred to as a “step gradient”) between the portion F2 and supports the tread plate 200 via a receiving member 100 fixed to the upper surface thereof.

  As shown in FIG. 2, the frame structure H is such that the upper structure surface is wider than the lower structure surface, and the left and right structure surfaces that are warren trusses face each other in an inverted C shape. A plurality of columnar node members 1A, 1B, a plurality of frames 2A, 2B, 2C connected to the node members 1A, 1B, and one of the node members 1A, 1B. A presser washer 3 that is a first presser member provided on the end face and a presser that is a kind of a second presser member provided on the other end face (the lower face in the present embodiment) of the node member 1B on the lower construction surface The nut 4 and a reinforcing member 5 which is a kind of a second pressing member provided on the other end face (upper face in the present embodiment) of the node member 1A constituting the upper construction surface are provided.

  In the following description, the node member 1A on the upper surface is referred to as “upper node member 1A”, and the node member 1B on the lower surface is referred to as “lower node member 1B”. A frame 2A connecting the upper node members 1A is referred to as an “upper frame 2A”, and a frame 2B connecting the lower node members 1B is referred to as a “lower frame 2B”. The frame 2C connecting the lower node member 1B and the lower node member 1B is referred to as a “lattice frame 2C”.

  The upper frame 2A includes a type that connects the upper node members 1A and 1A adjacent in the staircase inclination direction and a type that connects the upper node members 1A and 1A adjacent to the left and right. Other configurations are the same except for the difference. Similarly, the lower frame 2B includes a type that connects the lower node members 1B and 1B adjacent to each other in the staircase inclination direction and a type that connects the lower node members 1B and 1B adjacent to the left and right. Other configurations are the same except for the length.

  As shown in FIG. 3A, the upper node member 1A has a cylindrical shape, and both end surfaces thereof are formed flat. On the outer peripheral surface of the upper node member 1A, connecting grooves 11 extending from one end surface to the other end surface are recessed at a plurality of locations, and at the center of the upper node member 1A, from one end surface to the other end surface Is formed along the center line P of the upper node member 1A. In FIG. 3A, one of the three upper frames 2A connected to the upper node member 1A and one of the two lattice frames 2C are not shown. (See FIG. 2).

  The plurality of connecting grooves 11, 11,... Are arranged so as to surround the through hole 12. As shown in FIG. 3B, a plurality of protrusions 11a, 11a,... Are formed on the inner surface of the connecting groove 11 along the center line P (see FIG. 3A).

  A bolt B1 for integrally fixing the presser washer 3, the reinforcing member 5, and the receiving member 100 (see FIG. 1) to the upper node member 1A is inserted into the through hole 12.

  The upper node member 1A is made of an extruded shape made of an aluminum alloy (including pure aluminum; the same applies hereinafter), and the connecting groove 11 and the through hole 12 are formed when the aluminum alloy is extruded. The upper node member 1A may be manufactured by casting.

  Note that the height dimension of the upper node member 1A is set to a size that just fits the connection end 22 of the lattice frame 2C.

  A lower node member 1B shown in FIG. 4 has the same configuration as the upper node member 1A shown in FIG. 3 and includes a connecting groove 11 and a through hole 12. Since the structure of the connecting groove 11 and the through hole 12 is the same as that of the upper node member 1A, detailed description thereof is omitted, but the presser washer 3 and the presser nut 4 are provided in the through hole 12 with the lower node member. A bolt B2 for fixing to 1B is inserted. In FIG. 4, one of the three lower frames 2B connected to the lower node member 1B and one of the two lattice frames 2C are not shown (FIG. 2). reference)

  As shown in FIG. 5A, the upper frame 2A includes flat connection end portions 21 and 21 that are inserted into the connecting grooves 11 of the upper node member 1A.

  As shown in FIG. 5 (b), a plurality of protrusions 21 a, 21 a,... Are formed at the tip of the connection end 21 in a direction orthogonal to the axis Q of the upper frame 2 A. Is inserted into the connecting groove 11 of the upper node member 1A, the axis Q of the upper frame 2A is orthogonal to the center line P of the upper node member 1A. As described above, the height dimension of the upper node member 1A (or the lower node member 1B) (the length dimension of the connecting groove 11) is adjusted to the width dimension of the connection end portion 22 of the lattice frame 2C. When the connection end 21 of the upper frame 2A having a width dimension smaller than that of the connection end 22 of the frame 2C is inserted into the connection groove 11 of the upper node member 1A or the like, a rectangular gap 1s is formed.

  The shape of the connection end 21 viewed from the direction of the arrow X2 in FIG. 5B is substantially the same as the cross-sectional shape of the connecting groove 11 as shown in FIG. When 21 is inserted into the connection groove 11 of the upper node member 1A, the protrusion 11a of the connection groove 11 and the protrusion 21a of the connection end 21 are engaged with each other, and the upper frame 2A is prevented from coming out in the direction of the axis Q.

  The upper frame 2A is made of a hollow extruded profile made of an aluminum alloy having a circular cross section, and the connection end portions 21 at both ends are formed by crushing the end portions of the hollow extruded profile by pressing or the like.

  The lower frame 2B shown in FIG. 4 has the same configuration as the upper frame 2A, and is provided with connection end portions 21 and 21 having the same form as the connection end portion 21 of the upper frame 2A at both ends. When the connecting end 21 is inserted into the connecting groove 11 of the lower node member 1B, the axis of the lower frame 2B is orthogonal to the center line of the lower node member 1B.

  As shown in FIG. 6A, the lattice frame 2C includes flat connection end portions 22 and 22 inserted into the connection groove 11 of the upper node member 1A and the connection groove 11 of the lower node member 1B. .

  As shown in FIG. 6B, a plurality of protrusions 22a, 22a,... Are formed at the tip of the connection end portion 22 in a direction that forms an angle α with respect to the axis R of the lattice frame 2C. When the connecting end portion 22 is inserted into the connecting groove 11 of the upper node member 1A (or lower node member 1B), the axis R of the lattice frame 2C is at an angle with respect to the center line P of the upper node member 1A (or lower node member 1B). Tilt with α.

  The lattice frame 2C is made of an aluminum alloy hollow extruded shape having the same cross-sectional shape as the hollow extruded shape constituting the upper frame 2A, and the connecting end portions 22 at both ends press the ends of the hollow extruded shape. However, since the direction of the ridge 22a is not orthogonal to the axis R of the lattice frame 2C, the length of the ridge 22a (that is, the width of the connecting end 22) is It is larger than the protrusion 21a of the connection end 21 of the frame 2A. The shape of the connection end 22 viewed from the direction of the arrow X4 in FIG. 6B is substantially the same as the cross-sectional shape of the connecting groove 11 as shown in FIG. When the end 22 is inserted into the connecting groove 11, the protrusion 11a of the connecting groove 11 and the protrusion 22a of the connecting end 22 are engaged with each other, and the lattice frame 2C is prevented from coming out in the direction of the axis R.

  When the end of the hollow extruded shape member is crushed so that the protrusion 22a of the connection end 22 is inclined at an angle α with respect to the axis R of the lattice frame 2C, the connection end 22 exhibiting a substantially parallelogram is formed. In this embodiment, one end portion 22b in the width direction of the connection end portion 22 is cut off, and one end edge 22c in the width direction of the connection end portion 22 forms an angle α with the axis R. I try to make it. If it does in this way, compared with the case where the edge part 22b is not excised, the height dimension of the upper node member 1A or the lower node member 1B can be made small. Since the other end edge 22d in the width direction of the connection end portion 22 is substantially parallel to the axis R, a small gap 1t having a triangular shape is formed when inserted into the connecting groove 11.

  As shown in FIG. 3A and FIG. 4, the presser washer 3 prevents the upper frame 2A and the like from coming out in the direction of the center line P of the upper node member 1A (or the lower node member 1B). In this embodiment, the upper node member 1A is provided on the lower surface (see FIG. 3A) and the lower node member 1B on the upper surface (see FIG. 4).

  The presser washer 3 includes a washer body 31 having a contact surface that comes into contact with the end surface of the upper node member 1A or the lower node member 1B, and two types of insertion portions 31s and 31t provided on the contact surface of the washer body 31. And is configured.

  The washer body 31 is not limited in size and shape as long as it can cover the connecting groove 11 opened on the end face of the upper node member 1A and the like, but in this embodiment, the upper node member It is formed in a disk shape having an outer diameter substantially the same as the outer diameter of 1A (or the lower node member 1B). A bolt insertion hole 31a through which the shaft portion of the bolt B1 (or bolt B2) is inserted is formed at the center of the washer body 31, and the head of the bolt B1 (or bolt B2) is formed around the bolt insertion hole 31a. A circular recess 31b in which the part is accommodated is formed.

  The insertion portions 31 s and 31 t are both inserted into the connection groove 11. The insertion portion 31s having a rectangular shape fills a rectangular gap 1s (see FIG. 5B) formed when the upper frame 2A (or the lower frame 2B) is inserted into the coupling groove 11. The protruding end comes into contact with one end edge 21b (see FIG. 5B) of the connecting end portion 21 in the width direction. On the other hand, the insertion portion 31t having a triangular shape fills the triangular clearance 1t (see FIG. 6B) formed when the lattice frame 2C is inserted into the connecting groove 11, and the tip thereof is connected. It abuts against one end edge 22d in the width direction of the end portion 22 (see FIG. 6B). In addition, although the unevenness | corrugation engaged with the protrusion 11a of the connection groove | channel 11 is formed in the side surface of insertion part 31s, 31t of illustration, it does not mean that the shape of the insertion part 31 is limited. The shape of the insertion portions 31s and 31t is a plate having no unevenness on the side surface as long as the protruding end abuts against the connection end portion 21 and the like and can prevent the upper frame 2A from shifting and rotating. But you can.

  The washer body 31 and the insertion portions 31s and 31t are integrally formed. Such a press washer 3 can be obtained by casting an alloy containing a metal that can be easily cast, such as aluminum, tin, or zinc, but may be formed of a synthetic resin.

  As shown in FIG. 4, the presser nut 4 prevents the lower frame 2B and the like from coming out in the direction of the center line of the lower node member 1B. In this embodiment, the presser nut 4 is provided on the lower surface of the lower node member 1B. The nut body 41 has a contact surface that contacts the end surface of the lower node member 1B.

  The nut body 41 is not limited in size and shape as long as it can cover the connecting groove 11 opened in the end surface of the lower node member 1B, but in the present embodiment, the lower node member 1B. It is formed in a disk shape having an outer diameter substantially the same as the outer diameter of. In the center of the nut body 41, a bottomed female screw hole 41a into which the shaft portion of the bolt B2 is screwed is formed.

  The presser nut 4 can be obtained by casting an alloy containing a metal that can be easily cast, such as aluminum, tin, or zinc, but may be formed of a synthetic resin.

  The reinforcing material 5 shown in FIG. 2 reinforces the strength in the weak axis direction (left-right direction) of the joint between the upper node member 1A and the upper frame 2A, and the upper frame 2A in the direction of the center line of the upper node member 1A. In this embodiment, it is arranged across a plurality of upper node members 1A, 1A,.

  As shown in FIG. 3A, the reinforcing member 5 includes a flat plate portion 51 interposed between the upper surface of the upper node member 1 </ b> A and the receiving member 100 (see FIG. 1), and side edges of the flat plate portion 51. And a side plate portion 52 that hangs down from the bottom, and has an L-shaped cross section.

  The flat plate portion 51 includes a contact surface 51b that contacts the upper surface of the upper node member 1A and a mounting surface 51c on which the receiving material 100 (see FIG. 1) is mounted. In the flat plate portion 51, through holes 51a, 51a,... Are formed in accordance with the through holes 12 of the upper node member 1A. The width dimension of the flat plate portion 51 is not particularly limited as long as it can cover the connecting groove 11 opened on the end face of the upper node member 1A, but in this embodiment, the upper node member The width dimension is set to be substantially the same as the diameter of 1A.

  As shown in FIG. 7, the receiving material 100 is made of an aluminum alloy hollow extruded shape, and the mounting surface 101 that contacts the mounting surface 51 c of the flat plate portion 51 of the reinforcing material 5 and the tread plate 200 are mounted thereon. The reinforcing member 5 has a tread plate support surface 102, protrudes into the interior of the receiving member 100 of the bolt B1 inserted from the lower side of the upper node member 1A, and is screwed into the nut N1. Fixed to the top surface. The attachment surface 101 is inclined with respect to the tread board support surface 102 in a staircase gradient. When the receiving material 100 is attached to the upper surface of the reinforcing member 5, the tread board support surface 102 becomes horizontal.

  The tread board 200 is placed on the tread board support surface 102 of the receiving material 100 and is fixed to the receiving material 100 using a fastener such as a bolt and a nut.

  In order to assemble the framework structure H as described above, as shown in FIG. 8, first, the upper frame member 2A and the lattice frame 2C are connected to the upper node member 1A, and the lower frame member 2B and the lattice frame are connected to the lower node member 1B. Connect 2C.

  When the upper frame 2A (or the lattice frame 2C) is connected to the upper node member 1A, as shown in FIG. 9, the connection end 21 of the upper frame 2A (or the connection end 22 of the lattice frame 2C) is connected to the upper node. What is necessary is just to fit in the connection groove | channel 11 from the end surface side of the member 1A. An adhesive or the like may be poured into the coupling groove 11 so as to fill a minute gap generated between the coupling groove 11 and the connection end portions 21 and 22. Although not shown, the same applies to the case where the lower frame 2B is connected to the lower node member 1B and the case where the lattice frame 2C is connected to the lower node member 1B.

  When the upper frame member 2A and the lattice frame 2C are connected to the upper node member 1A, as shown in FIG. 10, the presser washer 3 is disposed on the lower end surface of the upper node member 1A, and the upper node member 1A has an upper end surface. After the reinforcing member 5 is disposed and the receiving member 100 is disposed on the upper surface of the reinforcing member 5, the bolt insertion hole 31 a of the presser washer 3, the through-hole 12 of the upper node member 1 </ b> A, and the through hole 51 a of the reinforcing member 5. The bolt B1 is inserted and screwed into a nut N1 loaded in the interior of the receiving member 100 (see FIG. 7).

  In this way, the upper node member 1 </ b> A is sandwiched between the press washer 3 and the reinforcing material 5. The presser washer 3 is in close contact with the lower end surface of the upper node member 1A and closes the connecting groove 11 opened to the end surface, thereby preventing the upper frame 2A and the like from coming out downward, and further reinforcing The material 5 is in close contact with the upper end surface of the upper node member 1A and closes the connecting groove 11 opened in the upper end surface, thereby preventing the upper frame 2A and the like from coming out upward.

  In addition, as shown in the schematic diagram of FIG. 11A in which the illustration of the upper node member 1A and the reinforcing member 5 is omitted, of the insertion portions 31s and 31t of the presser washer 3, The frame 2A is inserted into a rectangular gap 1s (see FIG. 5B) formed when the frame 2A is inserted into the connecting groove 11, and the protruding end abuts the edge 21b of the connecting end 21 of the lower frame 2B. . Further, the insertion portion 31t having a triangular shape is inserted into a triangular gap 1t (see FIG. 6B) formed when the lattice frame 2C is inserted into the coupling groove 11, and the protruding end of the insertion portion 31t of the lattice frame 2C is inserted. It abuts on the end edge 22d of the connection end 22.

  If it does in this way, since it becomes possible to prevent shift of upper frame 2A etc. to the extension direction of connecting groove 11, and rotation of upper frame 2A etc., it becomes difficult to generate a squeaking sound.

  When the lower frame member 2B and the lattice frame 2C are connected to the lower node member 1B, as shown in FIG. 10, the presser washer 3 is disposed on the upper end surface of the lower node member 1B, and the lower side of the lower node member 1B After the presser nut 4 is arranged on the end face of the presser, the bolt B2 is inserted into the bolt insertion hole 31a of the presser washer 3 and the through hole 12 of the upper node member 1A, and the tip is screwed into the female screw hole 41a of the presser nut 4. (See FIG. 7).

  In this way, the lower node member 1B is sandwiched between the presser washer 3 and the presser nut 4. The presser washer 3 is brought into close contact with the upper end surface of the lower node member 1B to close the connecting groove 11 opened to the end surface, thereby preventing the lower frame 2B and the like from coming out upward, and the presser nut. 4 closes to the lower end surface of the lower node member 1B and closes the connecting groove 11 opened to the lower end surface, thereby preventing the lower frame 2B and the like from coming out downward.

  In addition, as shown in the schematic diagram of FIG. 11B in which the illustration of the lower node member 1B is omitted, of the insertion portions 31s and 31t of the presser washer 3, the insertion portion 31s having a rectangular shape is the upper frame 2A (or The lower frame 2B) is inserted into a rectangular gap 1s (see FIG. 5B) formed when the lower frame 2B is inserted into the connecting groove 11, and the projecting end thereof is connected to the edge 21b of the connection end 21 of the lower frame 2B. Abut. Further, the insertion portion 31t having a triangular shape is inserted into a triangular gap 1t (see FIG. 6B) formed when the lattice frame 2C is inserted into the coupling groove 11, and the protruding end of the insertion portion 31t of the lattice frame 2C is inserted. It abuts on the end edge 22d of the connection end 22.

  If it does in this way, since it becomes possible to prevent shift of lower frame 2B etc. and rotation of lower frame 2B etc. to the extension direction of connecting slot 11, it becomes difficult to generate a squeaking sound.

  As described above, in the frame structure H according to the present embodiment, the extending direction of the connecting groove 11 can be achieved simply by disposing the presser washer 3 on the lower end surface of the upper node member 1A and the upper end surface of the lower node member 1B. It is possible to prevent the upper frame 2A from being displaced. That is, conventionally, it has been necessary to perform a troublesome work of forming a groove filling member having substantially the same shape in the rectangular gap 1s formed in the connecting groove 11, but the frame structure according to the present embodiment. According to this, since it is freed from such troublesome work, it is possible to easily and quickly assemble the frame structure.

  Further, in the frame structure H according to the present embodiment, since the insertion portion 31t of the press washer 3 is also inserted into the triangular gap 1t formed in the connection groove 11, it is difficult for squeaking noise to occur.

  Moreover, in the frame structure H according to the present embodiment, the presser washer 3 and the presser nut 4 function as “washers” and “nuts”, respectively, so that the number of parts can be reduced.

  Further, since the female screw hole 41a provided in the presser nut 4 has a bottom, the shaft part such as the bolt B1 does not protrude from the presser nut 4, and as a result, a cap that covers the shaft part such as the bolt B1. Can be omitted, and even if a cap or the like is omitted, a frame structure H having a clean appearance can be obtained.

  Furthermore, since the recessed part 31b in which the head such as the bolt B1 is accommodated is formed around the bolt insertion hole 31a of the presser washer 3, the head such as the bolt B1 becomes difficult to be visually recognized from the outside. It is possible to omit a cap or the like that covers the head, and even if the cap or the like is omitted, a frame structure H having a clean appearance can be obtained.

  In the present embodiment, the insertion portions 31s and 31t of the presser washer 3 correspond to all the gaps 1s and 1t formed in the plurality of connecting grooves 11 of the upper node member 1A (or the lower node member 1B). However, the present invention is not limited to this. For example, as shown in FIG. 12, a press washer 3 having only triangular insertion portions 31t and 31t corresponding to the triangular gap 1t may be used. In this case, the groove filling member 6 having substantially the same shape is inserted into the rectangular gap 1s. That is, what has the insertion part corresponding to the clearance gap formed in at least one of the some connection groove | channels 11 in the press washer 3 which is a 1st press member is contained in the technical scope of this invention.

  Further, in the present embodiment, the case where the insertion portions 31 s and 31 t are formed in the presser washer 3 is illustrated, but the insertion portion may be formed in the presser nut 4. That is, although illustration is omitted, there is no problem even if the presser nut 4 having the insertion portion is arranged on the upper end surface of the lower node member 1B and the presser washer 3 having no insertion portion is provided on the lower end surface of the lower node member 1B. Absent.

  In the present embodiment, the reinforcing member 5 disposed on the upper end surface of the upper node member 1A plays the role of the “second presser member”. However, when the reinforcing member 5 is omitted, The material 100 plays a role as a “second presser member”.

It is a side view of the stairs provided with the frame structure concerning the embodiment of the present invention. It is a perspective view which shows the frame structure which concerns on this embodiment. (A) is an expansion exploded perspective view of the frame structure concerning this embodiment, (b) is an expansion perspective view for explaining a connecting slot. It is an expansion disassembled perspective view in the site | part different from (a) of FIG. 3 of the frame structure which concerns on this embodiment. It is a figure which shows one form of the flame | frame of the frame structure which concerns on this embodiment, Comprising: (a) is a perspective view, (b) is X1 arrow directional view (side view) of (a), (c) is (b) It is a view on X2 arrow (top view). It is a figure which shows the other form of the flame | frame of the frame structure which concerns on this embodiment, Comprising: (a) is a perspective view, (b) is a X3 arrow view (side view) of (a), (c) is ( It is a X4 arrow line view (top view) of b). It is an enlarged side view of the frame structure concerning this embodiment. It is a disassembled perspective view of the frame structure concerning this embodiment. It is a disassembled perspective view for demonstrating the method of connecting a flame | frame to a nodal member. FIG. 8 is an exploded perspective view of FIG. 7. (A) is a schematic diagram showing a state in which a presser washer as a first presser member is attached to a node member, and (b) is an attachment of a presser washer as a first presser member and a presser nut as a second presser member to the node member. It is a schematic diagram which shows the state. It is a disassembled perspective view which shows the other form of the presser washer which is a 1st presser member. It is a disassembled perspective view which shows the conventional frame structure. It is a schematic diagram which shows the state which connected the flame | frame to the node member in the conventional frame structure.

Explanation of symbols

1A Upper node member (node member)
1B Lower node member (node member)
11 Connecting groove 12 Through hole 2A Upper frame (frame)
2B Lower frame (frame)
2C lattice frame (frame)
3 Presser washer (first presser member)
31a Bolt insertion hole 31b Recessed part 31s, 31t Insertion part 4 Presser nut (second presser member)
41a Female thread hole 5 Reinforcing material (second presser member)
B1, B2 Bolt H Frame structure

Claims (4)

A columnar nodal member;
A plurality of frames connected to the node member;
A frame structure comprising a first pressing member provided on one end face of the node member,
On the outer peripheral surface of the node member, a connecting groove extending from one end surface to the other end surface is recessed,
Each of the frames has a connection end inserted into the connection groove,
The first pressing member is provided with an insertion portion to be inserted into the connection groove on a contact surface with the end surface of the nodal member, and the protruding end of the insertion portion is connected to the connection end portion of the frame. A frame structure characterized by abutting. A second pressing member provided on the other end face of the node member;
In the node member, a through hole is formed from one end face to the other end face,
The frame structure according to claim 1, wherein the first pressing member and the second pressing member are pressed against an end surface of the node member by a bolt inserted into the through hole.   One of the first pressing member and the second pressing member is formed with a bolt insertion hole through which the shaft portion of the bolt is inserted, and the other is formed on the contact surface with the end surface of the node member. The frame structure according to claim 2, wherein a bottomed female screw hole into which a tip of the bolt is screwed is formed.   One of the first pressing member and the second pressing member is formed with a bolt insertion hole through which the shaft portion of the bolt is inserted, and the head of the bolt is formed around the bolt insertion hole. The frame structure according to claim 2, wherein a recessed portion to be accommodated is formed.

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