JP2018172946A - Anchor bolt for floor panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor bolt for a floor panel which can facilitate work for preventing an apparatus placed on the floor panel from overturning.SOLUTION: An anchor bolt for a floor panel is provided with a cylindrical upper member 41 and a cylindrical lower member 42, the upper member 41 having a cylindrical barrel part 41a and an expanded portion 41b formed at an upper end thereof, and the lower member 42 having a cylindrical barrel part 42a and an expanded portion 42b formed at a lower end thereof. Multiple slits 41e are spaced and formed at the barrel part 41a of the upper member 41 in the circumferential direction; a female thread is formed at an inner peripheral surface of the barrel part 42a of the lower member 42, and first protrusions 42h protruded to the outside in the radial direction from an outer peripheral surface of the barrel part 42a are formed; the barrel part 42a of the lower member 42 is fitted to an inner peripheral surface of the barrel part 41a of the upper member 41, and the first protrusions 42h of the lower member 42 are inserted into the slits 41e of the upper member 41.SELECTED DRAWING: Figure 12

Description

  The present invention relates to an anchor bolt for a floor panel used for fixing a device installed on the floor panel.

  The floor panel which comprises a free access floor was provided above the foundation floor surface of the building across the space (for example, refer patent document 1).

  18 to 24 are views referred to for explaining a conventional floor panel anchor bolt 4 provided on the floor panel 2 (see, for example, Patent Document 2).

  As shown in FIG. 18, the floor panel anchor bolt 4 has a cylindrical body portion 4 b extending in the axial direction (vertical direction in FIG. 18B) and a radially outer side at a lower end portion of the body portion 4 b. The projecting flange portion 4c and the quadrangular pyramid-shaped rib 4d (see FIG. 19) projecting so as to extend radially outward from the outer peripheral surface of the body portion 4b were provided. Moreover, as shown in FIG. 19, the internal thread part 4a was formed in the internal peripheral surface of the cylindrical trunk | drum 4b.

  In FIG. 19, for convenience of explanation, the body portion 4b, the flange portion 4c, and the rib 4d of the anchor bolt 4 for floor panel are distinguished and drawn by broken lines, but these are integrally formed.

  As shown in FIG. 20, the floor panel 2 provided with the floor panel anchor bolts 4 includes a plate-like top plate 6, a box-like bottom plate 8, and a reinforcing member 12 disposed therebetween. It was. Both the top plate 6 and the bottom plate 8 were formed using a steel plate material.

  As shown in FIG. 20, the bottom plate 8 includes a bottom plate portion 8b forming a bottom surface 8a, a side plate portion 8c extending upward in FIG. 20 from a peripheral portion of the bottom plate portion 8b, and an upper end portion of the side plate portion 8c. It was comprised from the peripheral part 8d bent toward the middle horizontal direction outer side.

  As shown in FIG. 20, the peripheral edge 8d of the bottom plate 8 is in contact with the peripheral edge 6b of the top plate 6, and is joined to the peripheral edge 6b by welding or caulking. The floor panel 2 is formed in a hollow rectangular parallelepiped shape having an inner space 10 surrounded by the top plate 6, the bottom plate portion 8b of the bottom plate 8, and the side plate portion 8c by integrally connecting the top plate 6 and the bottom plate 8. Was formed.

  The plate-like reinforcing member 12 is arranged in the internal space 10. As the reinforcing member 12, a particle board was used in which wood was crushed into small pieces and dried, and an adhesive was added and molded under high temperature and high pressure.

  As shown in FIG. 21, the floor panel 2 is formed with a plurality of through holes 2a penetrating in the thickness direction (vertical direction in FIG. 20), and through the floor panel anchor bolts 4 (see FIGS. 18 and 19). The hole 2a was inserted from the lower side in FIG.

  Further, the body portion 4 b of the floor panel anchor bolt 4 is formed so that the outer diameter of the outer peripheral surface thereof is substantially the same as the inner diameter of the through hole 2 a of the floor panel 2. For this reason, as shown in FIG. 22, the body portion 4 b of the anchor bolt 4 for floor panel is fitted into the through hole 2 a of the floor panel 2.

  The anchor bolt 4 for the floor panel is fitted into the through hole 2a by inserting the body part 4b from the lower side in FIG. 22 into the through hole 2a and hitting the flange part 4c from the lower side in the figure with a hammer or the like. It had been. As shown in FIG. 23, the floor panel anchor bolt 4 was embedded in the through hole 2 a until the flange portion 4 c contacted the bottom surface 8 a of the bottom plate 8.

  As shown in FIG. 22, in the floor panel 2, the bottom plate 8 and the reinforcing member 12 are pressed and deformed by contact with the rib 4d of the anchor bolt 4 for floor panel, so that a recess corresponding to the shape of the rib 4d is formed. A deformed portion 2b having a shape was formed. Then, the rib 4d is strongly fitted to the reinforcing member 12, whereby the floor panel anchor bolt 4 is fixed so as not to be easily separated from the through hole 2a.

  As shown in FIG. 23, the floor panel anchor bolt 4 is used to prevent the equipment 13 (printer or the like) placed on the upper surface 6 a of the floor panel 2 from falling.

  Hereinafter, the conventional means for preventing overturning of the equipment 13 using the floor panel anchor bolt 4, the male screw member 17, the fixed hardware 16, and the like will be described.

  As shown in FIG. 23, the side of the fixed hardware 16 is formed in a crank-shaped plate shape, and extends downward from the lower side portion 16b extending in the horizontal direction in the drawing and the right end portion of the lower side portion 16b in the drawing. The connecting portion 16c extends, and the upper side portion 16a extends horizontally from the upper end portion of the connecting portion 16c to the right side of the drawing.

  Then, the lower side portion 16b of the fixed hardware 16 is placed on the upper surface 6a of the floor panel 2, and the lower end portion of the male screw member 17 is inserted through the through hole 16e formed in the lower side portion 16b. 4 was fastened to the female screw part 4a.

  The nut member 19 is fastened to the portion of the male screw member 17 that protrudes upward from the through hole 16e of the fixed hardware 16, whereby the lower side portion 16 b of the fixed hardware 16 is fixed to the floor panel 2.

  Further, as shown in FIG. 24, the upper side portion 16a of the fixed hardware 16 has a U-shaped cutout portion 16d that is recessed from the edge on the right side in the length direction (right side in the drawing) toward the center of the length. Was formed. The male screw portion 18a (see FIG. 23) of the support leg 18 of the device 13 was loosely inserted into the cutout portion 16d.

  The upper end of the male screw portion 18 a of the support leg 18 is screwed to the female screw portion 13 a formed at the four corners of the device 13. And the support leg 18 was being fixed to the apparatus 13 by the nut member 20 arrange | positioned under the apparatus 13 being screw-coupled to the external thread part 18a.

  Similarly to the support leg 18 shown in FIG. 23, the support leg 18 fixed to each of the other four corners of the device 13 also has a male screw portion 18 a of a notch portion of the fixed hardware 16 fixed to the floor panel 2. 16d was inserted loosely.

  In this way, the lower side 16b of the fixed hardware 16 is fixed to the floor panel 2 (see FIG. 23), and the upper side 16a of the fixed hardware 16 restricts the horizontal and vertical movement of the support legs 18 of the device 13. (See FIGS. 23 and 24). For this reason, when vibration was applied to the device 13 placed on the upper surface 6a of the floor panel 2 due to an earthquake or the like, the device 13 could be prevented from falling down.

JP 2009-144378 A JP-A-2015-190107

  However, in the conventional floor panel anchor bolt 4, the floor panel anchor bolt 4 needs to be fitted from the bottom surface 8a side of the floor panel 2, so that the floor panel anchor bolt is laid after the floor panel 2 is laid. When 4 is to be provided on the floor panel 2, there is a problem that the work requires labor and time.

  That is, when the floor panel anchor bolt 4 is to be provided after the floor panel 2 is laid, the floor panel 2 is removed and the floor panel anchor bolt 4 is fitted into the through hole 2a from the bottom surface 8a side of the floor panel 2. It was necessary to lay the floor panel 2 again.

  Therefore, in view of the above problems, the present invention has an object of providing an anchor bolt for a floor panel that can facilitate the work for preventing the equipment mounted on the floor panel from falling. It is.

In order to solve the above problems, an anchor bolt for a floor panel according to the present invention is:
A cylindrical upper member and a cylindrical lower member;
The upper member has a cylindrical body portion and an enlarged diameter portion formed at the upper end portion thereof,
The lower member has a cylindrical body part and an enlarged diameter part formed at the lower end part thereof,
A plurality of slits are formed in the body portion of the upper member at intervals in the circumferential direction,
The body portion of the lower member is formed with a female screw on its inner peripheral surface, and a first protrusion that protrudes radially outward from the outer peripheral surface,
The body part of the lower member is fitted to the inner peripheral surface of the body part of the upper member,
The first protrusion of the lower member is inserted into the slit of the upper member.

Further, the anchor bolt for floor panel according to the present invention is:
The slit is
An upper slit located on the upper side in the axial direction of the upper member;
A lower slit located on the lower side in the axial direction of the upper member;
It has an opening shape in which three slits of an intermediate slit located between the upper slit and the lower slit are connected,
The first protrusion of the lower member is inserted into the upper slit,
The length dimension in the circumferential direction of the intermediate slit is larger than the length dimension in the circumferential direction of the upper slit and the lower slit.

Further, the anchor bolt for floor panel according to the present invention is:
A second protrusion that protrudes radially outward from the outer peripheral surface of the body part of the lower member is formed below the first protrusion,
The second protrusion of the lower member is inserted into the lower slit.

Further, the anchor bolt for floor panel according to the present invention is:
The intermediate slit is characterized in that a cut portion that opens toward the outer side in the circumferential direction is formed at a central portion of a side portion that extends in the axial direction of the upper member.

Further, the anchor bolt for floor panel according to the present invention is:
A protruding portion that protrudes radially outward from the outer peripheral surface of the body portion of the upper member is formed so as to fill an upper end portion of the body portion of the upper member and a corner portion of the enlarged diameter portion of the upper member. It is characterized by that.

Further, the anchor bolt for floor panel according to the present invention is:
The outer diameter dimension of the body part of the upper member is formed to be approximately the same length as the inner diameter dimension of the through hole of the floor panel on which the anchor bolt for floor panel is installed,
The outer diameter dimension of the enlarged-diameter portion of the upper member is formed so as to be larger than the inner diameter dimension of the through hole of the floor panel on which the floor panel anchor bolt is installed.

According to such an anchor bolt for floor panel of the present invention,
A cylindrical upper member and a cylindrical lower member;
The upper member has a cylindrical body portion and an enlarged diameter portion formed at the upper end portion thereof,
The lower member has a cylindrical body part and an enlarged diameter part formed at the lower end part thereof,
A plurality of slits are formed in the body portion of the upper member at intervals in the circumferential direction,
The body portion of the lower member is formed with a female screw on its inner peripheral surface, and a first protrusion that protrudes radially outward from the outer peripheral surface,
The body part of the lower member is fitted to the inner peripheral surface of the body part of the upper member,
By inserting the first projection of the lower member into the slit of the upper member,
It is possible to facilitate the work for preventing the equipment placed on the floor panel from falling.

It is a front view of anchor bolt 40 for floor panels concerning an embodiment of the invention. 2A is a top view of the floor panel anchor bolt 40 shown in FIG. 1, and FIG. 2B is a bottom view of the floor panel anchor bolt 40 shown in FIG. It is a front view of the sleeve 41 shown in FIG. 4A is a top view of the sleeve 41 shown in FIG. 3, and FIG. 4B is a bottom view of the sleeve 41 shown in FIG. 5A is a cross-sectional view taken along line AA of the sleeve 41 shown in FIG. 3, and FIG. 5B is a cross-sectional view taken along line BB of the sleeve 41 shown in FIG. is there. FIG. 4 is an enlarged front view showing only a slit 41e of a sleeve 41 shown in FIG. 3 in an enlarged manner. FIG. 7A is a front view of the sleeve 41 (a state in which the sleeve 41 of FIG. 3 is rotated by approximately 45 degrees to change the direction), and FIG. 7B is a bottom view of the sleeve 41 of FIG. is there. FIG. 8A is a front view of the sleeve 41 (a state in which the sleeve 41 of FIG. 7A is rotated by approximately 45 degrees to change the direction), and FIG. 8B is a view of the sleeve 41 of FIG. 8A. It is a bottom view. It is a front view of the pipe nut 42 shown in FIG. FIG. 10A is a top view of the pipe nut 42 shown in FIG. 9, and FIG. 10B is a bottom view of the pipe nut 42 shown in FIG. 11A is a cross-sectional view taken along the line CC of the pipe nut 42 shown in FIG. 10A, and FIG. 11B is a DD line of the pipe nut 42 shown in FIG. It is arrow sectional drawing. 12A is a view showing a state immediately before the pipe nut 42 in which the protrusions 42h and 42j are not formed is fitted to the sleeve 41, and FIG. FIG. 12C is a diagram showing a state in which the protrusions 42h and 42j are formed on the pipe nut 42. FIG. FIG. 4 is a view showing a state in which a bolt 44 is screwed into a female screw hole 42d of a pipe nut 42. It is a figure which shows the state which tightened the volt | bolt 44 from the state of FIG. 13, and the slender part 41i of the sleeve 41 was buckled. 15A is a view showing a state immediately before the floor panel anchor bolt 40 is fitted in the through hole 2a of the floor panel 2, and FIG. 15B is a floor panel anchor fitted in the through hole 2a. It is a figure which shows the state which screw-fastened the volt | bolt 44 to the pipe nut 42 of the volt | bolt 40. FIG. 16A is a view showing a state in which the elongated portion 41i of the sleeve 41 of the floor panel anchor bolt 40 is buckled by tightening the bolt 44 from the state of FIG. 15B, and FIG. These are figures which show the state which removed the volt | bolt 44 from the state of Fig.16 (a). The device 13 is placed on the free access floor 30 configured using the floor panel 2 provided with the floor panel anchor bolt 40, and the floor panel anchor bolt 40, the fixed hardware 16, the male screw member 17 and the like are used. It is a partially broken expanded side view which shows the state which fixed the 13 support legs. 18A is a top view of a conventional anchor bolt 4 for floor panel, and FIG. 18B is a side view of the anchor bolt 4 for floor panel in FIG. 18A. It is FF arrow directional cross-sectional view of the anchor bolt 4 for floor panels shown to Fig.18 (a). It is a partially broken side view of the floor panel 2 provided with the anchor bolt 4 for floor panels. It is a top view of the floor panel 2 shown in FIG. FIG. 22 is a cross-sectional view of the floor panel 2 of FIG. The equipment 13 is placed on the free access floor 1 configured by using the floor panel 2 provided with the floor panel anchor bolts 4 and the floor panel anchor bolts 4, the fixed hardware 16, the male screw member 17 and the like are used. It is a partially broken expanded side view which shows the state which fixed the 13 support legs. It is the EE arrow sectional drawing of the free access floor 30 in FIG. 17, and the HH arrow sectional drawing of the free access floor 1 in FIG.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the anchor bolt for floor panels which concerns on this invention is demonstrated concretely based on drawing.

  FIGS. 1-17 is a figure referred in order to demonstrate the anchor bolt 40 for floor panels which concerns on embodiment of this invention.

  As shown in FIGS. 1 and 2, the floor panel anchor bolt 40 according to the present embodiment is composed of two cylindrical members, a sleeve 41 (upper member) and a pipe nut 42 (lower member). ing. The sleeve 41 and the pipe nut 42 are both formed using steel.

  3 and 4, the sleeve 41 includes a cylindrical body portion 41a that extends in the vertical direction in FIG. 3, and an annular flange portion 41b that is located at the upper end portion of the sleeve 41 and projects outward in the radial direction. It is comprised from (expanded diameter part).

  As shown in FIG. 5B, the cylindrical body portion 41a is formed with a through hole 41c penetrating in the vertical direction in the drawing, and the annular flange portion 41b is penetrating in the vertical direction in the drawing. A hole 41d is formed, and the through hole 41c and the through hole 41d communicate with each other in the vertical direction in the figure.

  Further, as shown in FIG. 3, the body portion 41a has slits 41e penetrating from the outer peripheral surface thereof to the inner peripheral surface of the through hole 41c (see FIG. 5B) with a predetermined spacing in the circumferential direction. Four (see FIG. 5A) are formed.

  As shown in FIG. 6, the slit 41 e includes an upper slit 41 f located on the upper side (the upper side in the axial direction of the sleeve 41) and a lower slit 41 g located on the lower side (the lower side in the axial direction of the sleeve 41). In addition, it has an opening shape in which three differently shaped slits of the intermediate slit 41h located between the upper slit 41f and the lower slit 41g are connected.

  As shown in FIG. 6, the upper slit 41f has a substantially rectangular opening shape with a length dimension L1 in the left-right direction in the figure, and a U-shaped portion that opens in an inverted U-shape at the upper end thereof. 41j is formed.

  Further, the lower slit 41g has a substantially rectangular opening shape with a length dimension L1 in the left-right direction in FIG. 6, and the intermediate slit 41h has a substantially rectangular shape with a length dimension L2 in the left-right direction in FIG. It has an opening shape.

  As shown in FIG. 6, the length dimension L2 in the left-right direction in the drawing of the intermediate slit 41h is larger than the length dimension L1 in the left-right direction in the drawing of the upper slit 41f and the lower slit 41g.

  For this reason, as shown in FIG. 7A, the length dimension L4 between the adjacent intermediate slits 41h and 41h is the length dimension between the upper slits 41f and 41f adjacent to each other and between the lower slits 41g and 41g. It is shorter than L3.

  Therefore, in the body portion 41a of the sleeve 41, between the adjacent intermediate slits 41h and 41h, an elongated portion 41i having a narrower width than between the upper slits 41f and 41f and between the lower slits 41g and 41g (FIG. 7A). Reference) is formed.

  Further, the intermediate slit 41h has a central portion of two side portions 41k extending in the vertical direction (the axial direction of the sleeve 41) in FIG. 6 and on the outer side in the circumferential direction of the body portion 41a (outside in the left-right direction in FIG. 6). A notch 41l (cut portion) that opens in an arcuate shape is formed.

  And by forming the notch 41l, as shown in FIG. 7A, the width of the elongate portion 41i in the left-right direction in the drawing is locally reduced.

  Further, as shown in FIGS. 7A and 8A, the corners of the outer peripheral surface of the upper end portion of the body portion 41a of the sleeve 41 and the lower surface of the flange portion 41b are filled (see FIG. 8A). ), A protrusion 41m is formed.

  The protruding portion 41m protrudes radially outward from the outer peripheral surface of the body portion 41a (see FIG. 8). Further, as shown in FIG. 1, the projecting portion 41m extends from the flange portion 41b downward in the drawing to a predetermined height position, and extends substantially downward in the drawing from the lower end of the triangular prism portion 41o. It is comprised from the triangular pyramid part 41p of substantially inverted triangular pyramid shape (refer FIG. 7).

  Further, as shown in FIGS. 7B and 8B, two protruding portions 41m are formed at an interval of approximately 180 degrees in the circumferential direction of the body portion 41a.

  As shown in FIGS. 9 and 10, the pipe nut 42 has a cylindrical body portion 42 a extending in the vertical direction in FIG. 9 and an annular flange portion located at the lower end of the pipe nut 42 and projecting radially outward. 42b (expanded diameter part), and it is located between the trunk | drum 42a and the flange part 42b, and is comprised from the substantially annular | circular shaped inclination part 42c (expanded diameter part) diameter-expanded toward the lower side in FIG.

  As shown in FIGS. 11A and 11B, the body portion 42a has a female screw hole 42d in which a female screw is formed on the inner peripheral surface of a through hole penetrating in the vertical direction in the figure. The flange portion 42b is formed with a through hole 42e penetrating in the vertical direction in the figure. And the through-hole 42e of the flange part 42b is formed so that an internal-diameter dimension may become larger than the internal thread hole 42d of the trunk | drum 42a.

  In addition, the inclined portion 42c is formed with a through hole 42f that penetrates in the vertical direction in FIGS. 11A and 11B and that increases in diameter toward the lower side in the drawing. The female screw hole 42d of the body part 42a and the through hole 42e of the flange part 42b communicate with each other through the through hole 42f of the inclined part 42c.

  Further, as shown in FIG. 11 (a), the middle part of the body part 42a in the axial direction (vertical direction in the figure) penetrates from the outer peripheral surface to the inner peripheral surface of the female screw hole 42d, and the opening shape is circular. A through hole 42g (see FIG. 11B) is formed.

  Then, as shown in FIG. 10 (a), it protrudes radially outward from the outer peripheral surface of the body portion 42a at a position spaced apart by approximately 180 degrees in the circumferential direction of the body portion 42a from the through hole 42g. The protrusion 42h (first protrusion) having a substantially cylindrical shape (see FIGS. 11A and 15A) is formed.

  Further, as shown in FIG. 11 (a), on the lower side of the through hole 42g in the axial direction (vertical direction in the figure) of the body portion 42a, it penetrates from the outer peripheral surface to the inner peripheral surface of the female screw hole 42d, A through hole 42i having a circular opening shape (see FIG. 11B) is formed.

  Then, as shown in FIG. 11 (a), it protrudes radially outward from the outer peripheral surface of the body portion 42a at a position spaced apart by approximately 180 degrees in the circumferential direction of the body portion 42a from the through hole 42i. A substantially cylindrical projection (see FIG. 15A) 42j (second projection) is formed.

  As shown in FIGS. 12A to 12C, the anchor bolt 40 for floor panel is inserted into the through hole 41c of the body portion 41a of the sleeve 41 from the lower side in FIG. It is formed by fitting 42a.

  Since the outer diameter dimension of the body part 42 a of the pipe nut 42 is substantially the same as the inner diameter dimension of the through hole 41 c of the body part 41 a of the sleeve 41, the body part 42 a of the pipe nut 42 passes through the sleeve 41. It can be fitted into the hole 41c (see FIG. 12B).

  As shown in FIG. 12A, before fitting the body portion 42a of the pipe nut 42 into the through hole 41c of the sleeve 41, the protrusion 42h and the protrusion 42j (see FIG. 9) are formed on the pipe nut 42. Absent.

  Then, after the body portion 42a of the pipe nut 42 is fitted into the through hole 41c of the sleeve 41, the slit 41e of the sleeve 41 and the body portion 42a of the pipe nut 42 are penetrated as shown in FIG. The tip of a round bar-like member 43 is inserted through the hole 42g and the through hole 42i and inserted straight until it comes into contact with the inner peripheral surface of the female screw hole 42d.

  Then, by pressing the inner peripheral surface of the female screw hole 42d radially outward at the tip of the rod-shaped member 43, substantially cylindrical protrusions 42h and protrusions 42j are formed as shown in FIG. It has come to be.

  As shown in FIGS. 12C and 15A, the protrusion 42h is inserted into the lower end of the upper slit 41f (see FIG. 6) of the sleeve 41, and the end in the left-right direction in FIG. It protrudes so as to contact the inner peripheral surface of the upper slit 41f.

  Further, as shown in FIG. 12C, the protrusion 42h protrudes to a position substantially the same as the position of the outer peripheral surface of the body portion 41a of the sleeve 41, and does not protrude outward in the radial direction from the outer peripheral surface of the body portion 41a. Is formed.

  Thus, by forming the protrusion 42h using the rod-shaped member 43, even if the pipe nut 42 tries to rotate about its axis, the protrusion 42h engages with the inner peripheral surface of the upper slit 41f, and the pipe nut 42 42 is prevented from rotating with respect to the sleeve 41.

  The protrusion 42j protrudes so as to be inserted into the lower slit 41g (see FIG. 6) of the sleeve 41, as shown in FIGS. 12 (c) and 15 (a).

  Further, as shown in FIG. 12C, the protrusion 42j protrudes to a position substantially the same as the position of the outer peripheral surface of the body portion 41a of the sleeve 41, and does not protrude outward in the radial direction from the outer peripheral surface of the body portion 41a. Is formed.

  Thus, by forming the protrusion 42j using the rod-shaped member 43, the pipe nut 42 is prevented from being detached from the sleeve 41 and falling down downward in FIG. 12 (c).

  That is, the projection 42j of the pipe nut 42 engages with the inner peripheral surface on the lower side in FIG. 6 of the lower slit 41g (see FIG. 6) of the sleeve 41, so that the pipe nut 42 moves downward in FIG. 12 (c). It is designed not to fall out.

  Further, as shown in FIG. 12B, the body portion 42a of the pipe nut 42 is fitted in the through hole 41c of the body portion 41a of the sleeve 41, but the flange portion 42b and the inclined portion 42c of the pipe nut 42 are provided. (See FIG. 9) is not fitted because the outer diameter is larger than the inner diameter of the through hole 41c of the sleeve 41.

  For this reason, as shown in FIGS. 12B and 12C, the lower end portion of the body portion 41a of the sleeve 41 is in contact with the inclined outer peripheral surface of the inclined portion 42c of the pipe nut 42 (see FIG. 13). .

  FIG. 13 shows that the male screw portion 44a of the bolt 44 is inserted into the through holes 41c and 41d (see FIG. 5) of the sleeve 41, and the head 44b of the bolt 44 is in contact with the upper surface of the flange portion 41b of the sleeve 41. It is a figure which shows the state which screwed the male thread part 44a of the volt | bolt 44 in 42 d of female thread holes of the nut 42. FIG.

  As described above, the protrusion 42h is formed on the pipe nut 42 to prevent the pipe nut 42 from rotating relative to the sleeve 41. Therefore, when the bolt 44 is screwed into the female screw hole 42d of the pipe nut 42, the pipe nut 42 is rotated. The nut 42 is prevented from spinning idle.

  Then, when the bolt 44 is tightened from the state of FIG. 13, as shown in FIG. 14, the pipe nut is caused by the axial force F1 of the bolt 44 (the force that the bolt 44 pulled by the tightening rebounds to return to its original state). A force for pulling 42 upward in the drawing acts.

  As a result, as shown in FIG. 14, the outer peripheral surface of the inclined portion 42 c of the pipe nut 42 exerts a pressing force F <b> 2 that presses the lower end portion of the body portion 41 a of the sleeve 41 from the lower side to the upper side in the drawing.

  When the pressing force F2 is applied, the elongated portion 41i (see FIG. 3) of the trunk portion 41a is buckled in the middle in the length direction (vertical direction in FIG. 3), and the radial direction of the trunk portion 41a. Plastically deforms to spread outward.

  Then, as shown in FIG. 14, the pipe nut 42 is pulled up until the protrusion 42h comes close to the inner peripheral surface of the U-shaped portion 41j (see FIG. 6) of the upper slit 41f (FIGS. 16A and 16B). )reference).

  As described above, the length dimension L4 between the intermediate slits 41h and 41h adjacent to each other (see FIG. 7A) is the length dimension between the upper slits 41f and 41f adjacent to each other and between the lower slits 41g and 41g. Since it is smaller than L3 (see FIG. 7A), the elongated portion 41i is buckled by the pressing force F2.

  Further, as shown in FIG. 6, since the notch 41l is formed in the central portion of the side portion 41k of the intermediate slit 41h, the elongated portion 41i is buckled at the central portion in the vertical direction in FIG. It has become.

  Here, the process of installing the floor panel anchor bolt 40 on the floor panel 2 (see FIG. 20) will be described with reference to FIGS.

  As shown in FIG. 15A, a tile carpet 45 is laid on the upper surface 6 a of the floor panel 2. The tile carpet 45 is formed with a through hole 45 a having a larger inner diameter than the through hole 2 a of the floor panel 2 and having a circular opening shape so as to communicate with the through hole 2 a of the floor panel 2.

  Further, as shown in FIG. 15B, the inner diameter dimension of the through hole 45a of the tile carpet 45 is formed to be substantially the same as the outer diameter dimension of the flange portion 41b of the anchor bolt 40 for floor panel. Yes.

  Further, as shown in FIG. 15A, the inner diameter dimension of the through hole 2a of the floor panel 2 is the outer diameter dimension of the body part 41a of the sleeve 41 of the anchor bolt 40 for floor panel and the flange part 42b of the pipe nut 42. It is formed so as to have a length substantially the same as the outer diameter dimension.

  In order to install the floor panel anchor bolt 40 on the floor panel 2, first, as shown in FIGS. 15A and 15B, the sleeve of the floor panel anchor bolt 40 from the upper surface 6a side of the floor panel 2 is used. 41, the body 41a is fitted into the through hole 2a of the floor panel 2, and the flange 41b of the sleeve 41 is inserted into the through hole 45a of the tile carpet 45 and brought into contact with the upper surface 6a of the floor panel 2. Yes.

  Then, as shown in FIG. 15B, the bolt 44 is inserted into the female screw hole 42d of the pipe nut 42 (FIGS. 11A and 11B) until the head portion 44b of the bolt 44 contacts the flange portion 41b of the sleeve 41. Screw).

  Thereafter, as shown in FIG. 16 (a), by tightening the bolt 44, the elongated portion 41i (see FIG. 7 (a)) of the body portion 41a of the sleeve 41 is buckled, and toward the radially outer side. It is plastically deformed so as to spread (see FIG. 14). As shown in FIG. 16A, the elongated portion 41 i is plastically deformed until it contacts the bottom surface 8 a of the bottom plate 8 of the floor panel 2.

  Finally, as shown in FIG. 16 (b), the bolt 44 is loosened and removed from the pipe nut 42.

  In this way, in the state of FIG. 16B, the elongated portion 41i of the body portion 41a spreads outward in the radial direction, and therefore the floor panel anchor bolt 40 is directed upward in FIG. 16B. When a force to pull out is applied, the elongated portion 41i engages with the bottom surface 8a of the bottom plate 8 of the floor panel 2, and the floor panel anchor bolt 40 is pulled upward from the through hole 2a of the floor panel 2. There is no such thing.

  Further, since the outer diameter dimension of the flange portion 41b of the sleeve 41 is larger than the inner diameter dimension of the through hole 2a of the floor panel 2, the floor panel anchor bolt 40 is prevented from being pulled out downward in FIG. It has become.

  Further, since a protruding portion 41m (see FIG. 7A) is formed at the upper end portion of the body portion 41a of the sleeve 41, the elongated portion is obtained by strongly fitting the protruding portion 41m to the reinforcing member 12. At a stage before the plastic deformation of 41i (see FIG. 15B), the floor panel anchor bolt 40 does not float upward in FIG. 15B.

  For example, in the state of FIG. 15B, when the bolt 44 is tightened, the protrusion 41m is strongly fitted to the reinforcing member 12, so that the floor panel anchor bolt 40 is moved upward in FIG. 15B. It is designed not to float up towards.

  Further, since a protruding portion 41m (see FIG. 7A) is formed at the upper end portion of the body portion 41a of the sleeve 41, the floor panel anchor bolt 40 is driven into the protruding portion 41m to the reinforcing member 12. The sleeve 41 of the floor panel anchor bolt 40 is prevented from rotating with respect to the through hole 2a of the floor panel 2 by being strongly fitted.

  That is, when the protrusion 41m is strongly fitted to the reinforcing member 12, the bolt 44 is screwed into or tightened into the female screw hole 42d of the pipe nut 42 (see FIGS. 15B and 16A). Further, the sleeve 41 of the anchor bolt 40 for floor panel is prevented from spinning idle.

  FIG. 17 shows the floor panel anchor bolt 40, the male screw member 17, the fixed hardware 16, and the like in the free access floor 30 constituted by the floor panel 2 provided with the floor panel anchor bolt 40 according to the present embodiment. FIG. 6 is a view showing a state in which a device 13 (printer or the like) placed on the upper surface 6a of the floor panel 2 is fixed.

  As shown in FIG. 17, the fixed hardware 16 has a side surface formed in a crank-shaped plate shape, and extends downward from the lower side portion 16b extending in the horizontal direction in the drawing and the right end portion of the lower side portion 16b in the drawing. The connecting portion 16c extends, and the upper side portion 16a extends horizontally from the upper end portion of the connecting portion 16c to the right side of the drawing.

  Then, the lower side portion 16b of the fixed hardware 16 is placed on the upper surface 6a of the floor panel 2, and the lower end portion of the male screw member 17 is a through hole 16e formed in the lower side portion 16b and a sleeve of the anchor bolt 40 for floor panel. 41 is inserted into the through hole 41d (see FIG. 5) and is screwed into the female screw hole 42d (see FIGS. 11A and 11B) of the pipe nut 42.

  The nut member 19 is fastened to a portion of the male screw member 17 that protrudes upward from the through hole 16e of the fixed hardware 16 so that the lower side portion 16b of the fixed hardware 16 is fixed to the floor panel 2.

  Further, as shown in FIG. 24, the upper side portion 16a of the fixed hardware 16 has a U-shaped cutout portion that is recessed from the edge on the right side in the length direction (right side in FIG. 24) toward the center of the length. 16d is formed. A male screw portion 18a (see FIG. 17) of the support leg 18 of the device 13 is loosely inserted into the cutout portion 16d.

  The support leg 18 has an upper end portion of the male screw portion 18 a screwed to a female screw portion 13 a formed at four corners of the device 13. And the support leg 18 is being fixed to the apparatus 13 by the nut member 20 arrange | positioned under the apparatus 13 being screw-coupled to the external thread part 18a.

  Similarly to the support leg 18 shown in FIG. 17, the support leg 18 fixed to each of the other four corners of the device 13 also has a male screw part 18 a of a notch part of the fixed hardware 16 fixed to the floor panel 2. 16d is inserted loosely.

  In this way, the lower side 16b of the fixed hardware 16 is fixed to the floor panel 2 (see FIG. 17), and the upper side 16a of the fixed hardware 16 restricts the movement of the support legs 18 of the equipment 13 in the horizontal and vertical directions. (See FIGS. 17 and 24). For this reason, when vibration is applied to the device 13 placed on the upper surface 6a of the floor panel 2 due to an earthquake or the like, the device 13 can be prevented from falling.

  In the floor panel anchor bolt 40 according to the present embodiment, the floor panel anchor bolt 40 can be installed in the through hole 2a of the floor panel 2 from the upper surface 6a side of the floor panel 2. After laying, the work for providing the floor panel anchor bolt 40 on the floor panel 2 can be facilitated.

  That is, by using the floor panel anchor bolt 40 according to the present embodiment, the floor panel 2 that has been laid is removed, as in the case of using the conventional floor panel anchor bolt 4. There is no need to lay the floor panel 2 again by fitting the anchor bolt 4 from the bottom surface 8a side of the floor panel 2.

  Therefore, in the floor panel anchor bolt 40 according to the present embodiment, the work for preventing the equipment 13 placed on the floor panel 2 from falling down can be facilitated.

  The anchor bolt 60 for floor panels which concerns on the 2nd Embodiment of this invention is demonstrated.

  The floor panel anchor bolt 60 according to the present embodiment is provided with a sleeve 61 instead of the sleeve 41 (see FIG. 7) of the floor panel anchor bolt 40 in the first embodiment. This is different from the floor panel anchor bolt 40 according to the first embodiment.

  In the floor panel anchor bolt 40 according to the first embodiment, as shown in FIG. 1, the protruding portion 41m of the sleeve 41 protrudes radially outward from the outer peripheral surface of the body portion 41a, It is composed of a substantially triangular prism portion 41o extending downward from the flange portion 41b to a predetermined height in the drawing, and a substantially inverted triangular pyramid portion 41p extending further downward in the drawing from the lower end of the triangular column portion 41o. (See FIG. 7).

  On the other hand, in the floor panel anchor bolt 60 according to the present embodiment, the protruding portion 61m of the sleeve 61 protrudes radially outward from the outer peripheral surface of the body portion 61a and downward from the flange portion 61b in the figure. The semi-cylindrical portion 61o has a substantially semi-cylindrical shape extending to a predetermined height position, and a substantially inverted semi-conical semi-conical portion 61p extending further downward from the lower end of the semi-cylindrical portion 61o.

  As described above, the protrusion 61m of the sleeve 61 of the floor panel anchor bolt 60 according to the present embodiment and the protrusion 41m of the sleeve 41 of the floor panel anchor bolt 40 according to the first embodiment are shaped. Are different from each other. Other configurations are the same as those of the anchor bolt 40 for floor panel according to the first embodiment.

  In addition, this invention is not limited only to the said embodiment, If it is in the range which can achieve the objective of this invention, a various change is possible about the anchor bolt for floor panels.

  For example, the floor panel anchor bolt 40 according to the above embodiment is installed on the floor panel 2 including the top plate 6, the bottom plate 8, and the reinforcing member 12. However, the floor panel anchor bolt 40 is not necessarily limited to the floor panel 2. It may be installed on the floor panel of the type.

  In the floor panel anchor bolt 40 according to the above-described embodiment, the slit 41e has an opening shape in which three slits of the upper slit 41f, the lower slit 41g, and the intermediate slit 41h are connected (see FIG. 6). However, the present invention is not limited to such an opening shape, and may have another opening shape.

  In the floor panel anchor bolt 40 according to the embodiment, four slits 41e (see FIG. 5A) are formed at predetermined intervals in the circumferential direction of the body portion 41a. For example, four or more slits 41e may be formed.

  In the floor panel anchor bolt 40 according to the above embodiment, the notch 41l (see FIG. 6) is formed at the center of the side portion 41k of the intermediate slit 41h, but the notch 41l is formed in the intermediate slit 41h. It does not have to be.

  In the floor panel anchor bolt 40 according to the first embodiment, the protruding portion 41m of the sleeve 41 includes a substantially triangular prism-shaped triangular column portion 41o and a substantially inverted triangular pyramid-shaped triangular pyramid portion 41p. In the floor panel anchor bolt 60 according to the second embodiment, the protruding portion 61m of the sleeve 61 is constituted by a substantially semi-cylindrical semi-cylindrical portion 61o and a substantially inverted semi-conical semi-conical portion 61p. However, the protrusions 41m and 61m need not be limited to such a shape.

  That is, the protruding portions 41m and 61m may be formed in other shapes as long as they protrude from the outer peripheral surfaces of the body portions 41a and 61a of the sleeves 41 and 61 toward the radially outer side.

DESCRIPTION OF SYMBOLS 1 Free access floor 2 Floor panel 2a Through-hole 2b Deformation part 4 Anchor bolt for floor panels 4a Female thread part 4b Body part 4c Flange part 4d Rib 6 Top plate 6a Top surface 6b Peripheral part 8 Bottom plate 8a Bottom surface 8b Bottom plate part 8c Side plate part 8d Peripheral plate part 8d Part 10 Internal space 12 Reinforcement member 13 Equipment 16 Fixed metal 16a Upper side part 16b Lower side part 16c Connection part 16d Notch part 16e Through hole 17 Male screw member 18 Support leg 18a Male screw part 19 Nut member 20 Nut member 30 Free access floor 40 For floor panel Anchor bolt 41 Sleeve 41a Body part 41b Flange part 41c Through hole 41d Through hole 41e Slit 41f Upper slit 41g Lower slit 41h Intermediate slit 41i Elongated part 41j U-shaped part 41k Side part 41l Notch 1m Protruding part 41o Triangular prism part 41p Triangular pyramid part 42 Pipe nut 42a Body part 42b Flange part 42c Inclined part 42d Female screw hole 42e Through hole 42f Through hole 42g Through hole 42h Protrusion 42i Through hole 42j Protrusion 43 Rod 44 44 O Head 45 Tile carpet 45a Through hole 60 Anchor bolt for floor panel 61 Sleeve 61a Body part 61b Flange part 61m Protruding part 61o Semi-cylindrical part 61p Semi-conical part F1 Axial force F2 Pressing force L1 Length dimension L2 Length dimension L3 Length Dimension L4 Length dimension

Claims (6)

A cylindrical upper member and a cylindrical lower member;
The upper member has a cylindrical body portion and an enlarged diameter portion formed at the upper end portion thereof,
The lower member has a cylindrical body part and an enlarged diameter part formed at the lower end part thereof,
A plurality of slits are formed in the body portion of the upper member at intervals in the circumferential direction,
The body portion of the lower member is formed with a female screw on its inner peripheral surface, and a first protrusion that protrudes radially outward from the outer peripheral surface,
The body part of the lower member is fitted to the inner peripheral surface of the body part of the upper member,
The floor panel anchor bolt, wherein the first protrusion of the lower member is inserted into the slit of the upper member. The slit is
An upper slit located on the upper side in the axial direction of the upper member;
A lower slit located on the lower side in the axial direction of the upper member;
It has an opening shape in which three slits of an intermediate slit located between the upper slit and the lower slit are connected,
The first protrusion of the lower member is inserted into the upper slit,
The floor panel anchor bolt according to claim 1, wherein a length dimension of the intermediate slit in the circumferential direction is larger than a length dimension of the upper slit and the lower slit in the circumferential direction. A second protrusion that protrudes radially outward from the outer peripheral surface of the body part of the lower member is formed below the first protrusion,
The anchor bolt for a floor panel according to claim 2, wherein the second protrusion of the lower member is inserted into the lower slit. The notch part which opens toward the outer side of the said circumferential direction was formed in the center part of the edge part extended in the axial direction of the said upper side member in the said intermediate slit. Anchor bolt for floor panel. A protruding portion that protrudes radially outward from the outer peripheral surface of the body portion of the upper member is formed so as to fill an upper end portion of the body portion of the upper member and a corner portion of the enlarged diameter portion of the upper member. The anchor bolt for a floor panel according to any one of claims 1 to 4, wherein the anchor bolt is used. The outer diameter dimension of the body part of the upper member is formed to be approximately the same length as the inner diameter dimension of the through hole of the floor panel on which the anchor bolt for floor panel is installed,
The outer diameter dimension of the said enlarged diameter part of the said upper side member was formed so that it might become larger than the inner diameter dimension of the through-hole of the floor panel in which the said anchor bolt for floor panels is installed. The anchor bolt for floor panels according to any one of 5.

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