Fixing metal fitting and building

Abstract

To provide a fixing metal fitting capable of suppressing decrease in strength of a fixed state of a metal fitting to a cross member, and a building capable of maintaining stability of the fixed state of a suspended object by using a fixing metal fitting.SOLUTION: A fixing metal fitting 1 comprises a fixing part 9. The fixing part 9 has an insertion hole 13 extending in an axial direction SA, and comprises an external pin 14 which is driven into a ceiling beam 3A. The fixing part 9 comprises an engagement member 15 that is arranged in the external pin 14 and is provided so as to be able to protrude from the external pin 14 in a cross direction SB intersecting the axial direction SA, and that engages with the ceiling beam 3A. The fixing part 9 comprises an insertion member 16 that is inserted into the insertion hole 13 of the external pin 14 so as to press the engagement member 15 in the cross direction SB. The fixing part 9 comprises a biasing part 17 that biases the insertion member 16, and a support part 18 that supports the insertion member 16 via the biasing part 17.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The present disclosure relates to a fixing fitting and a building.

Background Art

[0002] A technique for fixing a fitting for connecting structural members to a structural member with a screw is known (for example, Patent Document 1). In Patent Document 1, a nut having a spring and a screw are used to fix the fitting to the structural member. Since the spring biases the screw, loosening of the screw is prevented.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in a building, a suspended object may be suspended. The suspended object is fixed to a cross member via a fitting. The fitting is fixed to the cross member by a fixing member such as a screw. In this case, each time a load is applied to the suspended object or each time the suspended object swings, an external force is applied to the fitting and the fixing member. Then, the screw hole gradually expands. When the screw hole expands, the screw loosens. And the fixing state of the fitting deteriorates. Therefore, a fixing fitting and a building are proposed that can suppress a decrease in the strength of the fixing state of the fitting with respect to the cross member.

Means for Solving the Problems

[0005] (1) The fixing fitting for solving the above problems is a fixing fitting for fixing a suspended object to a horizontal member, and includes a plate portion disposed on a first side surface of the horizontal member, a connecting portion provided on the plate portion to which the suspended object is connected, and a fixing portion for fixing the plate portion to the horizontal member. The fixing portion has an insertion hole extending in the axial direction, and an external pin that penetrates the plate portion and is driven into the horizontal member. An engaging member is disposed within the external pin and is provided so as to be able to project from the external pin in an intersecting direction intersecting the axial direction and engage with the horizontal member. An insertion member is inserted into the insertion hole of the external pin so as to push the engaging member in the intersecting direction, a biasing portion for biasing the insertion member, and a support portion provided on the plate portion for supporting the insertion member via the biasing portion.

[0006] According to this configuration, the insertion member pushes the engaging member in the intersecting direction. Therefore, when the hole of the horizontal member into which the external pin is driven expands, the engaging member is pushed out in the intersecting direction. As a result, the engagement between the engaging member and the hole of the horizontal member is continuously maintained. In this way, a decrease in the strength of the fixed state of the fixing fitting can be suppressed.

[0007] (2) In the fixing fitting according to (1) above, taking the plate portion as a first plate portion, a second plate portion disposed on a second side surface of the horizontal member opposite to the first side surface where the first plate portion is disposed, and an intermediate plate portion connecting the first plate portion and the second plate portion are further provided. A first fixing portion as the fixing portion is provided on the first plate portion, a second fixing portion as the fixing portion is provided on the second plate portion, and the connecting portion is provided on the intermediate plate portion.

[0008] According to this configuration, the fixing fitting is fixed to the first side surface and the second side surface of the horizontal member by the first fixing portion and the second fixing portion. Thereby, it is possible to suppress the fixing fitting from tilting with respect to the horizontal member due to the load applied to the fixing fitting via the suspended object.

[0009] (3) In the fixing fitting according to the above (1) or (2), the insertion member is configured to extend in the axial direction of the external pin, the biasing portion is configured to apply a first biasing force that pushes the insertion member in the axial direction, and the support portion supports the biasing portion so that the first biasing force is applied to the insertion member. According to this configuration, the insertion member can be biased in the axial direction.

[0010] (4) In the fixing fitting according to the above (1) or (2), the external pin has a female thread portion on the inner peripheral surface of the insertion hole, the insertion member has a male thread portion that engages with the female thread portion, and is configured to extend in the axial direction of the external pin. The biasing portion is configured to apply a second biasing force that rotates the insertion member in the circumferential direction about the central axis of the insertion member, and the support portion supports the biasing portion so that the second biasing force in the circumferential direction is applied to the insertion member. According to this configuration, the insertion member can be biased so that the insertion member is screwed into the insertion hole of the external pin by the second biasing force.

[0011] (5) The fixing fitting according to the above (1) or (2) further includes a biasing force increasing portion that increases the second biasing force of the biasing portion. The external pin has a female thread portion on the inner peripheral surface of the insertion hole, the insertion member has a male thread portion that engages with the female thread portion, and is configured to extend in the axial direction of the external pin. The biasing portion is configured to apply the second biasing force that rotates the insertion member in the circumferential direction about the central axis of the insertion member, the support portion supports the biasing portion, and the biasing force increasing portion is provided on the support portion and increases the second biasing force in the circumferential direction of the biasing portion based on an operation. According to this configuration, the second biasing force can be increased by the biasing force increasing portion.

[0012] (6) In the fixing fitting according to (5) above, the biasing portion includes a fitting portion for fitting the insertion member, and a torsion spring disposed between the insertion member and the support portion. The biasing force increasing portion includes a core member that supports the torsion spring, a ratchet gear, and a ratchet engaging portion that engages with the ratchet gear. The core member is supported by the fitting portion or the biasing force increasing portion. A first end of the torsion spring is connected to the insertion member or the fitting portion, and a second end of the torsion spring on the side opposite to the first end is connected to the ratchet gear. According to this configuration, the second biasing force can be increased by the ratchet mechanism.

[0013] (7) In the fixing fitting according to (6) above, the male screw portion is a screw in the first direction, the torsion spring is a coil spring wound in the first direction, the ratchet gear is configured to be rotatable in the first direction, and the ratchet engaging portion engages such that the ratchet gear is rotatable in the first direction and non-rotatable in the direction opposite to the first direction. According to this configuration, the second biasing force can be increased by the ratchet mechanism.

[0014] (8) In the fixing fitting according to (6) above, the male screw portion is a screw in the first direction, the torsion spring is a coil spring wound in the direction opposite to the first direction, the ratchet gear is configured to be rotatable in the first direction, and the ratchet engaging portion engages such that the ratchet gear is rotatable in the first direction and non-rotatable in the direction opposite to the first direction. According to this configuration, the second biasing force can be increased by the ratchet mechanism.

[0015] (9) The building that solves the above problems includes a frame including a horizontal member, and the fixing fitting according to any one of (1) to (8) above provided on the horizontal member. According to this configuration, in the building, a decrease in the strength of the fixing state of the fixing fitting with respect to the horizontal member can be suppressed. Therefore, when a suspended object is fixed to the horizontal member via the fitting, the stability of the fixing state of the suspended object can be maintained.

Effects of the Invention

[0016] According to the fixture of the present disclosure, a decrease in the strength of the fixing state of the fixture to the horizontal member can be suppressed. According to the building of the present disclosure, the stability of the fixing state of the suspended object can be maintained.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Modes for Carrying Out the Invention

[0018] [First Embodiment] With reference to FIGS. 1 to 12, the fixing fitting 1 and the building 2 will be described. As shown in FIGS. 1 and 2, the building 2 includes a framework including a horizontal member 3, and a fixing fitting 1 provided on the horizontal member 3. Examples of the building 2 include a detached house, an apartment house, and a facility. Examples of the facility include a rehabilitation facility, a sports gym, a facility including a room for sports and drama practice, and a health promotion center. In the present embodiment, the building 2 is a one-story rehabilitation facility. Examples of the horizontal member 3 include a girder and a beam. In the present embodiment, the horizontal member 3 is a wooden ceiling beam 3A. The ceiling beam 3A is a beam disposed near the ceiling. In the present embodiment, the ceiling beam 3A is disposed in the ceiling space. In other examples, the ceiling beam 3A may be disposed below the ceiling. The ceiling beam 3A has a first side surface 6, a second side surface 10 opposite to the first side surface 6, and a lower surface 11 connecting the lower end of the first side surface 6 and the lower end of the second side surface 10.

[0019] As shown in FIGS. 2 and 3, the fixing fitting 1 is a fitting for fixing a suspended object 4 to the ceiling beam 3A. The suspended object 4 is an object suspended from the ceiling beam 3A. Examples of the suspended object 4 include a rehabilitation device 4A, a health device, a training device, an electric device such as a projector and a television. In the present embodiment, the suspended object 4 is a rehabilitation device 4A. The rehabilitation device 4A is fixed to the ceiling beam 3A so as to be suspended from the ceiling beam 3A by the fixing fitting 1.

[0020] The fixing fitting 1 includes a plate portion 7 disposed on the first side surface 6 of the ceiling beam 3A, a connection portion 8 provided on the plate portion 7 to which the rehabilitation device 4A is connected, and a fixing portion 9 that fixes the plate portion 7 to the ceiling beam 3A. In the present embodiment, the plate portion 7 disposed on the first side surface 6 is referred to as the first plate portion 7A.

[0021] As shown in FIGS. 3 and 4, the fixing fitting 1 further includes a second plate portion 7B disposed on the second side surface 10 of the ceiling beam 3A. The fixing fitting 1 further includes an intermediate plate portion 7C that connects the first plate portion 7A and the second plate portion 7B. In a state where the fixing fitting 1 is attached to the ceiling beam 3A, the intermediate plate portion 7C extends along the lower surface 11 of the ceiling beam 3A. The connection portion 8 is provided on the intermediate plate portion 7C. The connection portion 8 extends downward from the intermediate plate portion 7C. The intermediate plate portion 7C may be disposed with a gap from the lower surface 11 of the ceiling beam 3A. When a gap is provided between the intermediate plate portion 7C and the ceiling beam 3A, a spacer may be disposed in the gap. The intermediate plate portion 7C may be disposed in contact with the lower surface 11.

[0022] In the present embodiment, the connection portion 8 extends downward from the intermediate plate portion 7C toward the ceiling 12. A bolt that penetrates the ceiling 12 is provided at the lower end of the connection portion 8. By attaching the rehabilitation device 4A to this bolt, the rehabilitation device 4A is fixed to the ceiling beam 3A.

[0023] A first fixing portion 9A as the fixing portion 9 is provided on the first plate portion 7A. A second fixing portion 9B as the fixing portion 9 is provided on the second plate portion 7B. The first fixing portion 9A and the second fixing portion 9B are arranged alternately in a plan view with respect to the ceiling beam 3A so that the respective external pins 14 do not interfere with each other (see FIG. 4). In the present embodiment, the first fixing portion 9A and the second fixing portion 9B have substantially the same configuration. Hereinafter, the first fixing portion 9A will be described. Also, in the following figures, illustration of the second fixing portion 9B will be omitted.

[0024] As shown in FIG. 5, the first fixing portion 9A includes an external pin 14 that penetrates the first plate portion 7A and is driven into the ceiling beam 3A. The external pin 14 has an insertion hole 13 extending in the axial direction SA. The first fixing portion 9A also includes an engagement member 15 disposed within the external pin 14. The engagement member 15 is provided so as to be protrudable from the external pin 14 in an intersecting direction SB (see FIG. 12) that intersects the axial direction SA. The first fixing portion 9A further includes an insertion member 16. The insertion member 16 is inserted into the insertion hole 13 of the external pin 14 so as to push the engagement member 15 in the intersecting direction SB. Furthermore, the first fixing portion 9A includes a biasing portion 17 that biases the insertion member 16, and a support portion 18 that supports the insertion member 16 via the biasing portion 17.

[0025] The biasing portion 17 is configured to apply a first biasing force FA to the insertion member 16. The first biasing force FA is a force that pushes the insertion member 16 in the axial direction SA. Specifically, the biasing portion 17 is constituted by an elastic member. In the present embodiment, the biasing portion 17 is constituted by a right-handed coil spring. The biasing portion 17 may be constituted by a left-handed coil spring. The first end 17A of the biasing portion 17 is connected to the insertion member 16 by welding or the like. In the biasing portion 17, the second end 17B on the side opposite to the first end 17A is connected to the support portion 18 by welding or the like.

[0026] The support portion 18 is constituted by a metal plate. The support portion 18 includes an arm portion 18A extending in a direction intersecting from the first plate portion 7A, and an arm hanging portion 18B extending so as to hang down from the arm portion 18A. The support portion 18 is provided on the first plate portion 7A. Specifically, the end portion of the arm portion 18A is attached to the first plate portion 7A by welding or the like. The arm hanging portion 18B extends downward from the tip of the arm portion 18A. The second end 17B of the biasing portion 17 is connected to the lower portion of the arm hanging portion 18B. The support portion 18 is preferably constituted by a metal plate having a thickness of 5 mm or more and 10 mm or less. In the present embodiment, the thickness of the metal plate constituting the support portion 18 is 6 mm. The support portion 18 supports the biasing portion 17 so that the first biasing force FA is applied to the insertion member 16.

[0027] As shown in FIGS. 6 and 7, the external pin 14 has a through hole 19 for the engagement member 15 (see FIG. 8) to project from the external pin 14. The through hole 19 extends from the outer peripheral surface of the external pin 14 toward the insertion hole 13. The through hole 19 is connected to the insertion hole 13. The engagement member 15 is accommodated in the through hole 19. The engagement member 15 is accommodated in the through hole 19 such that the upper surface 15A of the engagement member 15 faces the inner peripheral surface of the insertion hole 13 (see FIGS. 5 and 8). The external pin 14 is driven into the ceiling beam 3A so that the through hole 19 is positioned downward (see FIG. 5). In the present embodiment, the insertion hole 13 extends from the end of the external pin 14 to the middle portion of the external pin 14. The insertion hole 13 may be formed to penetrate from one end to the other end of the external pin 14.

[0028] As shown in FIG. 8, the engagement member 15 is formed in a shape like a frustum of a square pyramid. The upper surface 15A of the engagement member 15 is a surface that contacts the tip of the insertion member 16 (see FIG. 5). The upper surface 15A is an inclined surface that slopes so that the height decreases toward the tip of the insertion member 16. Here, the height of the engagement member 15 is defined as the radial length when the engagement member 15 is accommodated in the through hole 19 with the axial direction SA as the central axis. The engagement member 15 engages with the peripheral surface of the external pin hole 5 in the ceiling beam 3A by being pushed out from the through hole 19 (see FIG. 7) of the external pin 14 based on the pressing action of the insertion member 16. The external pin hole 5 indicates a hole formed by driving the ceiling beam 3A into the external pin 14. The lower surface 15B of the engagement member 15 always contacts the peripheral surface of the external pin hole 5 in the ceiling beam 3A (see FIG. 5). The upper surface 15A may be curved along the external pin 14. The lower surface 15B may be curved along the peripheral surface of the external pin hole 5.

[0029] As shown in FIG. 9, the insertion member 16 includes an internal pin 16A and a base 16B. In the present embodiment, the base 16B is formed of a plate-shaped metal plate. The internal pin 16A is configured to extend from the center of the surface of the base 16B in the axial direction SA of the external pin 14. The tip of the internal pin 16A is configured to be tapered. The internal pin 16A is inserted into the insertion hole 13 so that the tip of the internal pin 16A contacts the upper surface 15A of the engagement member 15 (see FIG. 5).

[0030] With reference to FIGS. 10 and 11, an example of the procedure for fixing the fixing bracket 1 to the ceiling beam 3A will be described. As shown in FIGS. 10 and 11, in a state where the first plate portion 7A is disposed on the first side surface 6 of the ceiling beam 3A, the external pin 14 is driven horizontally into the ceiling beam 3A by a tool such as a hammer so that the external pin 14 penetrates the first plate portion 7A.

[0031] Next, the internal pin 16A is inserted into the insertion hole 13 of the external pin 14. Then, the first end 17A of the biasing portion 17 is connected to the base 16B of the insertion member 16, and the second end 17B of the biasing portion 17 is connected to the support portion 18. Then, with the coil spring as the biasing portion 17 in a contracted state, the support portion 18 is attached to the first plate portion 7A. Since the above procedure is an example of fixing the fixing bracket 1 to the ceiling beam 3A, each step in the above procedure may be rearranged within a possible range.

[0032] [Operation of the Present Embodiment] With reference to FIG. 12, the operation of the present embodiment will be described. Note that the drawing schematically shows, in an exaggerated manner, the external pin hole 5 into which the external pin 14 is driven into the ceiling beam 3A for easy understanding. The dimensional ratio of the external pin hole 5 shown in FIG. 12 is different from the actual one.

[0033] The external pin 14 of the fixing fitting 1 is driven into the ceiling beam 3A through the plate portion 7. The insertion member 16 is biased in the axial direction SA by a biasing portion 17 supported by the support portion 18. The engaging member 15 in the external pin 14 is pushed in the intersecting direction SB intersecting the axial direction SA of the external pin 14 by the insertion member 16 inserted into the insertion hole 13 of the external pin 14.

[0034] When the plate portion 7 is simply fixed by bolts, if the load of the suspended object is repeatedly applied to the fixing fitting, the load concentrates on the bolts through the plate portion 7, so the bolt holes may expand. Since the threads are loosened due to the expansion of the bolt holes, the suspended object becomes unstable.

[0035] As shown in FIG. 12, according to the present embodiment, the insertion member 16 biased by the biasing portion 17 pushes the engaging member 15 in the intersecting direction SB intersecting the axial direction SA of the external pin 14 in accordance with the expansion of the external pin hole 5. Thereby, the engaging member 15 protrudes from the external pin 14 so as to follow the expansion of the external pin hole 5. Then, the engaging member 15 continues to engage with the ceiling beam 3A. By the engagement between the engaging member 15 and the external pin hole 5 in the ceiling beam 3A, loosening of the external pin 14 can be suppressed. Thereby, destabilization of the fixed state of the rehabilitation device 4A provided on the ceiling beam 3A can be suppressed.

[0036] Further, the fixing fitting 1 may be fixed to the ceiling beam 3A such that the intermediate plate portion 7C extending along the lower surface 11 of the ceiling beam 3A is disposed with a gap from the lower surface 11. In this case, it becomes easy to adjust the height of the attachment position of the fixing fitting 1 with respect to the ceiling beam 3A.

[0037] [Effects of the Present Embodiment] The effects of the present embodiment will be described. (1) The fixing fitting 1 includes a plate portion 7 disposed on the first side surface 6 of the ceiling beam 3A, a connection portion 8 to which the rehabilitation device 4A is connected, and a fixing portion 9 that fixes the plate portion 7 to the ceiling beam 3A. The connection portion 8 is provided on the plate portion 7. The fixing portion 9 has an insertion hole 13 extending in the axial direction SA and includes an external pin 14 that penetrates the plate portion 7 and is driven into the ceiling beam 3A. The fixing portion 9 is provided with an engagement member 15 that is disposed within the external pin 14 and can project from the external pin 14 in an intersecting direction SB that intersects the axial direction SA and engages with the ceiling beam 3A. The fixing portion 9 includes an insertion member 16 that is inserted into the insertion hole 13 of the external pin 14 so as to push the engagement member 15 in the intersecting direction SB. The fixing portion 9 includes a biasing portion 17 that biases the insertion member 16 and a support portion 18 that supports the insertion member 16 via the biasing portion 17.

[0038] The load of the rehabilitation device 4A is applied to the external pin hole 5 of the ceiling beam 3A into which the external pin 14 is driven via the connection portion 8 and the external pin 14. The external pin hole 5 may expand due to the load of the rehabilitation device 4A. According to this configuration, the insertion member 16 pushes the engagement member 15 in the intersecting direction SB. Therefore, when the external pin hole 5 of the ceiling beam 3A into which the external pin 14 is driven expands, the engagement member 15 is pushed out in the intersecting direction SB. As a result, the engagement between the engagement member 15 and the external pin hole 5 is continuously maintained. In this way, a decrease in the strength of the fixed state of the fixing fitting 1 can be suppressed.

[0039] (2) The fixing fitting 1 further includes a second plate portion 7B disposed on the second side surface 10 opposite to the first side surface 6 where the first plate portion 7A is disposed on the ceiling beam 3A, with the plate portion 7 as the first plate portion 7A. The fixing fitting 1 further includes an intermediate plate portion 7C connecting the first plate portion 7A and the second plate portion 7B. A first fixing portion 9A as a fixing portion 9 is provided on the first plate portion 7A. A second fixing portion 9B as a fixing portion 9 is provided on the second plate portion 7B. The connecting portion 8 is provided on the intermediate plate portion 7C. According to this configuration, the fixing fitting 1 is fixed to the first side surface 6 and the second side surface 10 of the ceiling beam 3A by the first fixing portion 9A and the second fixing portion 9B. Thereby, it is possible to suppress the fixing fitting 1 from tilting with respect to the ceiling beam 3A due to the load applied to the fixing fitting 1 via the rehabilitation device 4A.

[0040] (3) The insertion member 16 is configured to extend in the axial direction SA of the external pin 14. The biasing portion 17 is configured to apply a first biasing force FA that pushes the insertion member 16 in the axial direction SA. The support portion 18 supports the biasing portion 17 so that the first biasing force FA is applied to the insertion member 16. According to this configuration, the insertion member 16 can be biased in the axial direction SA.

[0041] (4) The building 2 includes a housing including the ceiling beam 3A and a fixing fitting 1 provided on the ceiling beam 3A. According to this configuration, in the building 2, it is possible to suppress a decrease in the strength of the fixing state of the fixing fitting 1 with respect to the ceiling beam 3A. Therefore, when the rehabilitation device 4A is fixed to the ceiling beam 3A via the fitting, the stability of the fixing state of the rehabilitation device 4A can be maintained.

[0042] [Second Embodiment] The fixing fitting 1 of the second embodiment will be described. In this embodiment, for the configurations common to the first embodiment, the same reference numerals as those in the configuration of the first embodiment are given. The description of the overlapping configurations will be omitted.

[0043] With reference to FIGS. 13 to 15, the description of this embodiment will be made. In this embodiment, the insertion member 16 has a screw structure. The biasing portion 17 is configured to apply a second biasing force FB that rotates the insertion member 16 in the circumferential direction SC about the central axis of the insertion member 16. The central axis of the insertion member 16 extends along the axial direction SA. And the biasing portion 17 stores a biasing force in the circumferential direction SC with respect to the central axis of the insertion member 16. Specifically, the biasing portion 17 is constituted by a coil spring. The coil spring has a structure wound in the circumferential direction SC. In this embodiment, the circumferential direction SC is the clockwise direction.

[0044] As shown in FIG. 13, the external pin 14 has a female screw portion 20 on the inner peripheral surface of the insertion hole 13. The female screw portion 20 is wound in the same direction as the biasing portion 17. In this embodiment, the female screw portion 20 is a right-handed screw.

[0045] As shown in FIG. 14, the insertion member 16 configured to extend in the axial direction SA of the external pin 14 has a male screw portion 21 that engages with the female screw portion 20. In this embodiment, the male screw portion 21 is a right-handed screw.

[0046] Referring to FIG. 15, the operation of this embodiment will be described. Note that the drawing schematically shows the external pin hole 5 of the ceiling beam 3A in an exaggerated manner for easy understanding. The dimensional ratio of the external pin hole 5 is different from the actual one.

[0047] As shown in FIG. 15, the biasing portion 17 is configured to apply a second biasing force FB that rotates the insertion member 16 in the circumferential direction SC about the central axis of the insertion member 16. The circumferential direction SC is the same clockwise direction as the winding directions of the female screw portion 20 and the male screw portion 21. In a state where the biasing portion 17 is pre-twisted in the same direction as the circumferential direction SC, the first end 17A of the biasing portion 17 is connected to the insertion member 16, and the second end 17B of the biasing portion 17 is connected to the support portion 18. The support portion 18 supports the biasing portion 17 so that the second biasing force FB in the circumferential direction SC is applied to the insertion member 16. The biasing portion 17 applies the second biasing force FB to the insertion member 16. The insertion member 16 is inserted into the external pin 14 in a state where the second biasing force FB is applied.

[0048] According to such a configuration, by the second biasing force FB that rotates the insertion member 16 in the circumferential direction SC of the external pin 14, the insertion member 16 is biased so as to be screwed into the depth of the insertion hole 13 of the external pin 14. Since the engagement member 15 is pushed by the insertion member 16, the engagement member 15 protrudes from the external pin 14 so as to follow the expansion of the external pin hole 5. Then, the engagement member 15 continues to engage with the ceiling beam 3A. By the engagement between the engagement member 15 and the external pin hole 5 in the ceiling beam 3A, loosening of the external pin 14 can be suppressed.

[0049] [Third Embodiment] The fixing bracket 1 of the third embodiment will be described. In the present embodiment, for the configurations common to the first embodiment and the second embodiment, the same reference numerals as those in the configurations of the first embodiment and the second embodiment are given. The description of the overlapping configurations is omitted.

[0050] The fixing bracket 1 of the present embodiment is different from the fixing bracket 1 of the second embodiment in that it includes a biasing force increasing portion 23 that can increase the biasing force of the biasing portion 17.

[0051] With reference to FIGS. 16 and 17, the present embodiment will be described. Note that the illustration of the female screw portion 20 and the male screw portion 21 is omitted. As shown in FIG. 16, the biasing portion 17 includes a torsion spring 27 disposed between the insertion member 16 and the support portion 18. The external pin 14 has a female screw portion 20 on the inner peripheral surface of the insertion hole 13. The insertion member 16 is configured to extend in the axial direction SA of the external pin 14. The insertion member 16 has a male screw portion 21 that engages with the female screw portion 20. In the present embodiment, the male screw portion 21 is a screw in the first direction SD. In the present embodiment, the first direction SD is the clockwise direction. The first direction SD may be the counterclockwise direction.

[0052] In this embodiment, the torsion spring 27 is a coil spring wound in the first direction SD. Specifically, the torsion spring 27 is a right-handed coil spring. The torsion spring 27 may be a left-handed coil spring. Further, the support portion 18 supports the biasing portion 17. The fixing bracket 1 further includes a biasing force increasing portion 23 that increases the second biasing force FB in the first direction SD on the torsion spring 27 based on an operation (described later). The biasing force increasing portion 23 is provided on the support portion 18 (described later). In the support portion 18, a core material through hole 18C is provided at a portion where the biasing force increasing portion 23 is provided. The core material through hole 18C allows the second end 17B of the torsion spring 27 and the core material 24 to be inserted therethrough (described later).

[0053] As shown in FIGS. 16 and 17, the biasing force increasing portion 23 includes a core material 24 that supports the torsion spring 27, a ratchet gear 25, and a ratchet engaging portion 26 that engages with the ratchet gear 25.

[0054] The ratchet gear 25 is accommodated in a ratchet gear housing portion 28 attached to the arm hanging portion 18B of the support portion 18. The ratchet gear housing portion 28 has a first housing hole 28A for housing the ratchet gear 25. The ratchet gear housing portion 28 has a second housing hole 28B for housing the ratchet engaging portion 26 (described later). The first housing hole 28A communicates with the core material through hole 18C (see FIG. 16).

[0055] The ratchet gear 25 has an insertion hole 25A formed to communicate with the core material through hole 18C and a threaded winding portion 29. In this embodiment, the threaded winding portion 29 is a nut attached to the ratchet gear 25 by welding or the like. The threaded winding portion 29 is integrally formed with the ratchet gear 25. The threaded winding portion 29 is arranged such that the nut hole communicates with the insertion hole 25A.

[0056] The core member 24 is supported by the biasing force increasing portion 23. One end of the core member 24 is fixed to the ratchet gear 25 or the threaded portion 29. The other end of the core member 24 is not connected to other members. The core member 24 extends in the axial direction SA from the ratchet gear 25. The core member 24 is inserted through the central portion of the torsion spring 27 and the core member through hole 18C. The torsion spring 27 is supported by the core member 24. Note that the end of the core member 24 on the support portion 18 side may be configured as a free end. In this case, the end of the core member 24 on the insertion member 16 side is fixed to the base portion 16B of the insertion member 16.

[0057] The first end 17A of the torsion spring 27 is connected to the base portion 16B of the insertion member 16. The second end 17B of the torsion spring 27, which is on the side opposite to the first end 17A, is connected to the ratchet gear 25. The second end 17B connected to the ratchet gear 25 is inserted through the core member through hole 18C.

[0058] The ratchet gear 25 is configured to be rotatable in the first direction SD. The ratchet gear 25 can rotate about the core member 24 by rotating the threaded portion 29. The ratchet engaging portion 26 engages with the ratchet gear 25 such that the ratchet gear 25 is rotatable in the first direction SD and non-rotatable in the direction opposite to the first direction SD. The ratchet engaging portion 26 is a rod-shaped member. The ratchet engaging portion 26 is accommodated in the second accommodation hole 28B of the ratchet gear accommodation portion 28. The second accommodation hole 28B communicates with the first accommodation hole 28A via the communication portion 34. The ratchet engaging portion 26 has a keyway 26A at the center. A protruding portion 18D extending from the support portion 18 is inserted into the keyway 26A. The ratchet engaging portion 26 can rotate about the protruding portion 18D.

[0059] The second receiving hole 28B is configured such that when the ratchet engaging portion 26 rotates in the third direction SX, the ratchet engaging portion 26 can rotate in a direction away from the ratchet gear 25. Further, the second receiving hole 28B includes a stopper portion 35 that stops the rotation of the ratchet engaging portion 26. The stopper portion 35 is configured such that the opposite end portion 37 on the side opposite to the tip end portion 36 of the ratchet engaging portion 26 abuts thereon. Specifically, when the ratchet engaging portion 26 rotates in a direction opposite to the third direction SX, the stopper portion 35 is configured such that the opposite end portion 37 of the ratchet engaging portion 26 abuts on the stopper portion in a state where the tip end portion 36 of the ratchet engaging portion 26 is inserted between the teeth of the ratchet gear 25 and the rotation of the ratchet engaging portion 26 is inhibited.

[0060] Specifically, the second receiving hole 28B has a corner portion 30 as a stopper portion 35 near the ratchet engaging portion 26. The corner portion 30 is composed of a first surface 31 and a second surface 32. The first surface 31 is a surface extending in a predetermined direction. In a state where the ratchet engaging portion 26 contacts the first surface 31, the tip end portion 36 of the ratchet engaging portion 26 does not contact the ratchet gear 25. The second surface 32 is a surface extending perpendicular to the predetermined direction. In a state where the ratchet engaging portion 26 contacts the second surface 32, the tip end portion 36 of the ratchet engaging portion 26 contacts the teeth of the ratchet gear 25 between the teeth of the ratchet gear 25. The ratchet gear 25 and the ratchet engaging portion 26 contacting the second surface 32 engage with the ratchet gear 25 so that the ratchet gear 25 does not rotate in a direction opposite to the first direction SD.

[0061] The torsion spring 27 of the biasing portion 17 is configured to apply a second biasing force FB. The second biasing force FB is a force that rotates the insertion member 16 in the first direction SD about the central axis of the insertion member 16.

[0062] An operation of the biasing force increasing portion 23 for increasing the second biasing force FB in the first direction SD of the torsion spring 27 will be described. When the screw winding portion 29 is rotated in the same direction as the first direction SD, the ratchet gear 25 rotates in the first direction SD, and the torsion spring 27 as the biasing portion 17 is twisted in the first direction SD, so that elastic energy is accumulated in the torsion spring 27. In this way, the second biasing force FB of the torsion spring 27 as the biasing portion 17 can be increased.

[0063] The effects of the present embodiment will be described. (1) The fixing bracket 1 further includes a biasing force increasing portion 23 that increases the second biasing force FB of the torsion spring 27. The external pin 14 has a female screw portion 20 on the inner peripheral surface of the insertion hole 13. The insertion member 16 has a male screw portion 21 that engages with the female screw portion 20 and is configured to extend in the axial direction SA of the external pin 14. The torsion spring 27 is configured to apply a second biasing force FB that rotates the insertion member 16 in the first direction SD about the central axis of the insertion member 16. The support portion 18 supports the torsion spring 27. The biasing force increasing portion 23 is provided on the support portion 18. The biasing force increasing portion 23 increases the second biasing force FB in the first direction SD of the torsion spring 27 based on an operation. According to this configuration, the second biasing force FB can be increased by the biasing force increasing portion 23.

[0064] (2) In the fixing bracket 1 described in (1) above, the biasing force increasing portion 23 includes a core member 24 that supports the torsion spring 27, a ratchet gear 25, and a ratchet engaging portion 26. The core member 24 is supported by the biasing force increasing portion 23. The first end 17A of the torsion spring 27 is connected to the insertion member 16, and the second end 17B of the torsion spring 27 is connected to the ratchet gear 25. According to this configuration, the second biasing force FB can be increased by the ratchet mechanism.

[0065] (3) In the fixing fitting 1 described in (2) above, the male screw portion 21 is a screw in the first direction SD. The torsion spring 27 is a coil spring wound in the first direction SD. The ratchet gear 25 is configured to be rotatable in the first direction SD. The ratchet engaging portion 26 engages such that the ratchet gear 25 is rotatable in the first direction SD and non-rotatable in the direction opposite to the first direction SD. According to this configuration, the second biasing force FB can be increased by the ratchet mechanism.

[0066] [Fourth Embodiment] The fixing fitting 1 of the fourth embodiment will be described. In this embodiment, components common to the third embodiment are denoted by the same reference numerals as those in the third embodiment. The description of overlapping components is omitted.

[0067] Referring to FIG. 18, the present embodiment will be described. The third embodiment is different in terms of the connection between the insertion member 16 and the biasing portion 17. As shown in FIG. 18, the base portion 16B of the insertion member 16 is formed to be a bolt head. Further, the core member 24 is integrally formed with the threaded portion 29. As an example, the threaded portion 29 is a bolt. The core member 24, which is the shaft portion of the bolt, passes through the insertion hole 25A, the core member through-hole 18C, and the center of the torsion spring 27.

[0068] The biasing portion 17 further includes a fitting portion 22 for fitting the insertion member 16. The fitting portion 22 is a rod-shaped member. A first recess 22A for fitting the base portion 16B is provided at one end of the fitting portion 22. A second recess 22B is provided at the other end of the fitting portion 22. The core member 24 is inserted into the second recess 22B so as to be rotatable. The first end 17A of the torsion spring 27 is connected to the fitting portion 22. With this configuration as well, the fixing fitting 1 exhibits the same effects as those of the third embodiment.

[0069] [Modification Example] Each of the above embodiments is an example of a form that the fixing fitting 1 and the building 2 can take. Each of the above embodiments is not intended to limit the forms that the fixing fitting 1 and the building 2 can take. The fixing fitting 1 and the building 2 can take forms different from those exemplified in each of the above embodiments. An example thereof is a form in which a part of the configuration of the embodiment is replaced, changed, or omitted, or a form in which a new configuration is added to the embodiment. An example of a modification of the embodiment is shown below.

[0070] · As shown in FIG. 19, the suspended object 4 fixed to the ceiling beam 3A by the fixing fitting 1 may be a hammock 4B. Each end portion 33 of the hammock 4B is suspended by the fixing fitting 1. The two fixing fittings 1 are arranged on the ceiling beam 3A at a predetermined distance apart.

[0071] · The male screw portion 21 may be formed to be left-handed, which is opposite to the circumferential direction SC. The female screw portion 20 is configured to be engageable with the male screw portion 21 formed to be left-handed.

[0072] This specification discloses the following technology. [Appendix 1] Appendix 1 is a fixing fitting for fixing a suspended object to a cross member. The fixing fitting includes a plate portion disposed on a first side surface of the cross member, a connection portion provided on the plate portion to which the suspended object is connected, and a fixing portion for fixing the plate portion to the cross member. The fixing portion has an insertion hole extending in the axial direction, and an external pin that penetrates the plate portion and is driven into the cross member. An engaging member is disposed within the external pin and is provided so as to be able to protrude from the external pin in an intersecting direction intersecting the axial direction and engage with the cross member. An insertion member is inserted into the insertion hole of the external pin so as to push the engaging member in the intersecting direction. A biasing portion biases the insertion member. A support portion is provided on the plate portion to support the insertion member via the biasing portion.

[0073] [Appendix 2] In the fixing fitting described in Supplementary Note 1, taking the plate portion as a first plate portion, in the horizontal cross member, a second plate portion disposed on a second side surface opposite to a first side surface where the first plate portion is disposed, and an intermediate plate portion connecting the first plate portion and the second plate portion are further provided. A first fixing portion as the fixing portion is provided on the first plate portion. A second fixing portion as the fixing portion is provided on the second plate portion. The connecting portion is provided on the intermediate plate portion.

[0074] [Supplementary Note 3] In the fixing fitting described in Supplementary Note 1 or Supplementary Note 2, the insertion member is configured to extend in the axial direction of the external pin. The biasing portion is configured to apply a first biasing force that pushes the insertion member in the axial direction. The support portion supports the biasing portion so that the first biasing force is applied to the insertion member.

[0075] [Supplementary Note 4] In the fixing fitting described in Supplementary Note 1 or Supplementary Note 2, the external pin has a female thread portion on the inner peripheral surface of the insertion hole. The insertion member has a male thread portion that engages with the female thread portion and is configured to extend in the axial direction of the external pin. The biasing portion is configured to apply a second biasing force that rotates the insertion member in the circumferential direction about the central axis of the insertion member. The support portion supports the biasing portion so that the second biasing force in the circumferential direction is applied to the insertion member.

[0076] [Supplementary Note 5] In the fixing fitting described in Supplementary Note 1 or Supplementary Note 2, a biasing force increasing portion for increasing the second biasing force of the biasing portion is further provided. The external pin has a female thread portion on the inner peripheral surface of the insertion hole. The insertion member has a male thread portion that engages with the female thread portion and is configured to extend in the axial direction of the external pin. The biasing portion is configured to apply the second biasing force that rotates the insertion member in the circumferential direction about the central axis of the insertion member. The support portion supports the biasing portion. The biasing force increasing portion is provided on the support portion and increases the second biasing force in the circumferential direction of the biasing portion based on an operation.

[0077] [Appendix 6] In the fixing fitting described in Appendix 5, the biasing portion includes a fitting portion for fitting the insertion member, and a torsion spring disposed between the insertion member and the support portion. The biasing force increasing portion includes a core member that supports the torsion spring, a ratchet gear, and a ratchet engaging portion that engages with the ratchet gear. The core member is supported by the fitting portion or the biasing force increasing portion. A first end of the torsion spring is connected to the insertion member or the fitting portion, and a second end of the torsion spring on the side opposite to the first end is connected to the ratchet gear.

[0078] [Appendix 7] In the fixing fitting described in Appendix 6, the male screw portion is a screw in a first direction. The torsion spring is a coil spring wound in the first direction. The ratchet gear is configured to be rotatable in the first direction. The ratchet engaging portion engages such that the ratchet gear is rotatable in the first direction and non-rotatable in the direction opposite to the first direction.

[0079] [Appendix 8] In the fixing fitting described in Appendix 6, the male screw portion is a screw in a first direction. The torsion spring is a coil spring wound in a direction opposite to the first direction. The ratchet gear is configured to be rotatable in the first direction. The ratchet engaging portion engages such that the ratchet gear is rotatable in the first direction and non-rotatable in the direction opposite to the first direction.

[0080] [Appendix 9] Appendix 9 is a technology related to a building. The building includes a frame including horizontal members, and the fixing fitting according to claim 1 or 2 provided on the horizontal members.

Explanation of Reference Numerals

[0081] FA... first biasing force, FB... second biasing force, SA... axial direction, SB... intersecting direction, SC... circumferential direction, SD... first direction, 1... fixing fitting, 2... building, 3... horizontal member, 4... suspended object, 6... first side surface, 7... plate portion, 7A... first plate portion, 7B... second plate portion, 8... connecting portion, 9... fixing portion, 9A... first fixing portion, 9B... second fixing portion, 10... second side surface, 13... insertion hole, 14... external pin, 15... engaging member, 16... insertion member, 17... biasing portion, 17A... first end, 17B... second end, 18... support portion, 20... female screw portion, 21... male screw portion, 22... fitting portion, 23... biasing force increasing portion, 24... core material, 25... ratchet gear, 26... ratchet engaging portion, 27... torsion spring.

Claims

1. A fixing fitting for fixing a suspended object to a horizontal member, comprising: a plate portion disposed on a first side surface of the horizontal member; a connecting portion provided on the plate portion to which the suspended object is connected; and a fixing portion for fixing the plate portion to the horizontal member. The fixing portion includes: an external pin having an insertion hole extending in an axial direction and driven into the horizontal member through the plate portion; an engaging member disposed within the external pin and provided so as to be capable of protruding from the external pin in an intersecting direction intersecting the axial direction and engaging with the horizontal member; an insertion member inserted into the insertion hole of the external pin so as to push the engaging member in the intersecting direction; a biasing portion for biasing the insertion member; and a support portion provided on the plate portion for supporting the insertion member via the biasing portion. Fixing fitting.

2. Taking the plate portion as a first plate portion, further comprising: a second plate portion disposed on a second side surface of the horizontal member opposite to the first side surface where the first plate portion is disposed; and an intermediate plate portion connecting the first plate portion and the second plate portion. The first plate portion is provided with a first fixing portion as the fixing portion. The second plate portion is provided with a second fixing portion as the fixing portion. The connecting portion is provided on the intermediate plate portion. The fixing fitting according to claim 1.

3. The insertion member is configured to extend in the axial direction of the external pin. The biasing portion is configured to apply a first biasing force for pushing the insertion member in the axial direction. The support portion supports the biasing portion so that the first biasing force is applied to the insertion member. The fixing fitting according to claim 1 or 2.

4. The external pin has a female thread portion on an inner peripheral surface of the insertion hole. The insertion member has a male thread portion that engages with the female thread portion and is configured to extend in the axial direction of the external pin. The biasing portion is configured to apply a second biasing force for rotating the insertion member in a circumferential direction about a central axis of the insertion member. The support portion supports the biasing portion so that the second biasing force in the circumferential direction is applied to the insertion member. The fixing fitting according to claim 1 or 2.

5. Further comprising a biasing force increasing portion for increasing the second biasing force of the biasing portion. The external pin has a female thread portion on an inner peripheral surface of the insertion hole. The insertion member has a male screw portion that engages with the female screw portion and is configured to extend in the axial direction of the external pin. The biasing portion is configured to apply the second biasing force that rotates the insertion member in the circumferential direction about the central axis of the insertion member. The support portion supports the biasing portion. The biasing force increasing portion is provided on the support portion and increases the second biasing force in the circumferential direction of the biasing portion based on an operation. The fixing fitting according to claim 1 or 2.

6. The biasing portion includes a fitting portion into which the insertion member is fitted, and a torsion spring disposed between the insertion member and the support portion. The biasing force increasing portion includes a core member that supports the torsion spring, a ratchet gear, and a ratchet engaging portion that engages with the ratchet gear. The core member is supported by the fitting portion or the biasing force increasing portion. A first end of the torsion spring is connected to the insertion member or the fitting portion, and a second end of the torsion spring opposite to the first end is connected to the ratchet gear. The fixing fitting according to claim 5.

7. The male screw portion is a screw in a first direction. The torsion spring is a coil spring wound in the first direction. The ratchet gear is configured to be rotatable in the first direction. The ratchet engaging portion engages such that the ratchet gear is rotatable in the first direction and non-rotatable in a direction opposite to the first direction. The fixing fitting according to claim 6.

8. The male screw portion is a screw in a first direction. The torsion spring is a coil spring wound in a direction opposite to the first direction. The ratchet gear is configured to be rotatable in the first direction. The ratchet engaging portion engages such that the ratchet gear is rotatable in the first direction and non-rotatable in a direction opposite to the first direction. The fixing fitting according to claim 6.

9. A building body including a horizontal member and the fixing fitting according to claim 1 or 2 provided on the horizontal member. Building.

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