JP5415322B2 - Box fixture to the pole and the box to be fixed to the pole - Google Patents

Description

  The present invention relates to a box fixture for fixing a box to a magnetic metal pole formed in a column shape for drawing in an overhead electric wire, and a box fixed to the pole. In this specification, the term “magnetic attachment” is frequently used. The term “magnetic attachment” refers to a fixed object (box) with respect to an object to be fixed (pole) by using the magnetic attraction force of a permanent magnet. Means to fix.

  For example, in order to draw a power supply cable into a house or to draw the cable into a building construction site or the like, a wiring pole for drawing an overhead electric wire is erected on the site. In particular, in a construction site, a box for storing a wattmeter or the like for integrating power used during construction is fixed to the pole. Most of these poles are made of magnetic metals such as iron and steel.

  As a fixture for fixing the box to the pole, the one disclosed in Patent Document 1 is known. The fixture disclosed in Patent Document 1 is a fixture that fixes a box to a pole using a band, and can use the same band even if the outer diameter of the pole is different. That is, using a band in which a number of locking holes are provided at a constant pitch, for example, the band is inserted into a metal fitting fixed to the back of the box, and both ends of the band are provided in the band. Clamping bolts screwed to the fixture in a state where the bands are hooked on a fastening member that is provided so as to be movable with respect to the fixture. By moving the tightening member in the tangential direction of the portion of the pole where the fixture is attached, the extra length of the band is absorbed, and tension is applied to the band, whereby the box is attached to the pole. Is fixed.

  However, the fixture of Patent Document 1 has an advantage that the same band can be used for a plurality of poles having different outer diameters, but in addition to the necessity of using a band with holes, the band with holes is indispensable. It is essential to insert the screw into the bracket on the back of the fixture and hook both ends of the fixture on the fixture, and to apply tension by absorbing the extra length of the band by turning the tightening bolts many times. In particular, this work is extremely troublesome because tension cannot be applied to the band unless the tightening bolt is turned many times. Also, when removing the box from the pole, it is necessary to turn the tightening bolt in the opposite direction many times in the same way, which is similarly troublesome.

JP 2006-83998 A

  The present invention pays attention to the fact that the overhead wire pull-in pole is made of magnetic metal, and using a pair of inclined magnet bodies, the box can be attached to and detached from the pole with one touch, The problem is to eliminate the trouble of attaching and detaching the box.

  The invention of claim 1 for solving the above problem is a box fixture for fixing a box to a magnetic metal pole formed in a columnar shape, the box mounting surface to which the box is mounted, A pair of magnet bodies that are magnetically attached to the outer peripheral surface of the pole, and the pair of magnet bodies has one magnet body that is magnetically attached along the outer peripheral surface of the pole. It is characterized by being inclined.

  According to the first aspect of the present invention, since the pair of magnet bodies are relatively inclined, the magnetic metal is disposed at a position where both of the pair of magnet bodies are disposed in the tangential direction of the outer peripheral surface of the pole. It is magnetically attached to the made pole. Therefore, the box is magnetically attached to the pole only by attaching the box to the attachment surface of the box fixture and directing the pair of magnets of the box fixture to the outer peripheral surface of the pole. The box can be fixed with one touch.

  According to the invention of claim 1, since the box fixture is separate from the box, select only for a temporary magnetic metal pole used in a construction site of a building. Can be used.

  According to a second aspect of the present invention, in the first aspect of the invention, the relative inclination angle of the pair of magnet bodies can be adjusted according to the outer diameter of the pole, and before and after the adjustment, It is fixed so that it can be maintained, and can be magnetized to the pole before and after adjustment.

  In a state where the box is fixed to the pole via the box fixing tool, the surfaces of the pair of magnet bodies are both arranged tangential to the outer peripheral surface of the pole. In the invention of claim 2, the relative inclination angle of the pair of magnet bodies can be adjusted corresponding to the outer diameter of the pole, and is fixed so that the inclination angle can be maintained before and after the adjustment. Therefore, the box can be fixed to a plurality of poles having different outer diameters by changing the relative inclination angles of the pair of magnet bodies corresponding to the outer diameter of the poles.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the pair of magnet bodies have their opposite side portions bent to the same side, and the front end surface of the bent portion becomes a contact surface with respect to the pole. In the state where the box is fixed to the pole via the pair of magnet bodies in the arrangement in which the bent portion of the yoke is arranged along the axial direction of the pole, the front end surface of the yoke is the outer peripheral surface of the pole. The front end surface of the yoke protrudes from the surface of the magnet body so that a gap can be formed between the surface of the magnet body and the outer peripheral surface of the pole.

  When a box is fixed to a magnetic metal pole via a box fixture provided with a pair of magnet bodies, magnetic attachment is possible if the magnet body is brought into direct contact with the outer peripheral surface of the pole. However, most of the magnetic flux flows through the abutting portion of the magnet body, and the magnetic attractive force of the portion having a gap in the magnet body is reduced. On the other hand, as in the third aspect of the invention, only the tip surface of the yoke housing the magnet body is in contact with the pole, and the surface of the magnet body is not in direct contact with the outer peripheral surface of the pole. As a result, a magnetic flux is generated between the entire surface of the magnet body and the magnetic metal pole, and as a result, a magnetic attraction force (magnetism) larger than that in the case where the magnet body is brought into direct contact with the pole. Strength). Here, the magnetic attractive force acting between the magnet body and the pole is inversely proportional to the square of the distance between the magnet body and the outer peripheral surface of the pole, so that the magnet body does not contact the pole. As described above, it is desirable to make the gap between the pole and the outer peripheral surface as small as possible. On the other hand, since the magnet body does not directly contact the pole, there is also an advantage that the magnet body can be prevented from being damaged or broken due to the magnet body contacting the pole. In addition, since the pair of bent portions constituting the yoke is along the axial direction of the pole, the front end surface of each bent portion is continuously in contact with the pole along the axial direction of the pole. The contact state is stable. As a result, the fixed state of the box fixed to the pole is stabilized by the magnetizing force of the pair of magnet bodies, and the box is difficult to be removed from the pole.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, the pair of magnet bodies with respect to the pole in a state in which the box is attached to the pole by magnetic attachment of the pair of magnet bodies with respect to the pole. It is characterized by comprising a magnetic adhesion release part for forcibly releasing the magnetic adhesion.

  The magnetizing force of the pair of magnets with respect to the pole is such a size that the box can be fixed to the pole, and it is necessary that the magnet body is not easily detached even when a light impact force is applied. On the other hand, in order to remove the box from the pole, it is preferable that the box is easily removed with a relatively small force, and the certainty of fixing the box to the pole and the ease of removal are contradictory. Therefore, as in the invention of claim 4, the box fixture has a magnetic attachment releasing portion for forcibly releasing the magnetic attachment of the pair of magnet bodies to the pole in a state where the box is attached to the pole. Thus, the magnetic attachment releasing part can forcibly release the magnetic attachment by the pair of magnet bodies, and the box can be easily detached after the box is securely fixed to the pole.

  The invention of claim 5 is a box which is integrally provided with a box fixing portion on the back side and is fixed to a pole made of magnetic metal formed in a columnar shape, and the box fixing portion is an outer peripheral surface of the pole. A pair of magnet bodies that are magnetically attached to each other, wherein the pair of magnet bodies are arranged such that the other magnet body is inclined with respect to one magnet body so as to be magnetized along the outer peripheral surface of the pole. It is characterized by being. For this reason, according to invention of Claim 5, the effect similar to invention of Claim 1 is show | played except the effect by the box fixing tool being a separate body from a box.

  According to the present invention, since the pair of magnet bodies are relatively inclined, both the pair of magnet bodies are made of magnetic metal at a position where they are arranged in the tangential direction of the outer peripheral surface of the pole. Magnetically attached to the pole. Therefore, the box is magnetically attached to the pole only by attaching the box to the attachment surface of the box fixture and directing the pair of magnets of the box fixture to the outer peripheral surface of the pole. The box can be fixed with one touch. Further, if the relative inclination angle of the pair of magnet bodies can be adjusted corresponding to the outer diameter of the pole, the relative inclination angle of the pair of magnet bodies is changed corresponding to the outer diameter of the pole. By doing so, the box can be fixed to a plurality of poles having different outer diameters.

FIG. 5 is a perspective view of a state in which a box B is fixed to a pole P ₁ using a box fixing tool F. It is the figure which looked at the same state from the front of box B. FIG. 3 is an enlarged sectional view taken along line XX in FIG. 2. Is a view corresponding to line X-X enlarged sectional view of FIG. 2 with the attached box B to another pole P _2. It is the YY line expanded sectional view of FIG. (A), (b) is the perspective view which looked at the box fixing tool F from the box attachment surface 1 and the magnet body M side, respectively. It is the perspective view which isolate | separated the fixing tool main body A and a pair of magnet assembly G. FIG. It is a longitudinal cross-sectional view of the same state. It is a perspective view in the state where magnet assembly G and magnetism release lever K were separated. It is a figure which shows the fixation principle of the box fixing tool F which concerns on invention of Claim 1. It is a top view which shows the effect | action by which the box fixture F magnetically attached to the pole P is removed by a pair of magnetic release release levers K. When the arc centers C ₂₁ and C _{22 of the} pair of magnet assembly mounting surfaces 2 exist, the tip surfaces 74a of the pair of left and right yokes 73 of the box fixture F are both outer peripheral surfaces of the poles P ₁₁ and P ₁₂ . It is a schematic diagram which shows contacting. Abuts against the outer peripheral surface of each tip surface 74a both Paul P _13, P ₁₄ of the pair of yokes 73 of the box fixture F when the pair of arc center C ₂₃ of the magnet assembly body mounting surface 2 are common It is a schematic diagram which shows this.

The invention according to claim 1 will be described in more detail with reference to the best embodiment. First, the structure of the box fixture F according to the invention of claim 1 will be described with reference to FIGS. 1 to 10, and then the box for the magnetic metal pole P ₁ using the box fixture F will be described. The fixing of B and the release thereof will be described. 1 is a perspective view of a state in which the box B is fixed to the pole P ₁ using the box fixture F, FIG. 2 is a view of the same state as viewed from the front of the box B, and FIG. a line X-X enlarged sectional view of FIG. 2, FIG. 4 is a view corresponding to line X-X enlarged sectional view of FIG. 2 with the attached box B to another pole P _2, FIG. 5 FIG. 6 is an enlarged cross-sectional view taken along line YY of FIG. 3, and FIGS. 6A and 6B are perspective views of the box fixture F as viewed from the box mounting surface 1 and the magnet body M side, FIG. 7 is a perspective view in which the fixture body A and the pair of magnet assemblies G are separated, FIG. 8 is a longitudinal sectional view of the same state, and FIG. FIG. 10 is a perspective view showing a state in which the magnetic adhesion release lever K is separated, and FIG. 10 is a view showing a fixing principle of the box fixture F according to the invention of claim 1.

As shown in FIGS. 6 to 9, the box fixture F includes a fixture body A having a box attachment surface 1 for attaching the box B, and a surface opposite to the box attachment surface 1 of the fixture body A. A pair of magnet assemblies G mounted and movable along a circular arc surface having a center in a plane perpendicular to the box mounting surface 1, and a magnet holder 12 constituting each magnet assembly G It is comprised with a pair of magnetic adhesion cancellation | release lever K connected with respect to rotation. The fixture main body A, the magnet holder 12 and the magnetic release release lever K are all made of resin. The fixture body A has an elongated rectangular parallelepiped block shape with a rectangular cross section, and has a length (L) corresponding to the width of the box B fixed to the pole P ₁ (P ₂ ). The shape is bilaterally symmetric with respect to a center line E (see FIGS. 3 and 4) provided perpendicular to the box mounting surface 1 at the center position in the longitudinal direction when viewed. That is, the fixture main body A is used for attaching the magnet assembly G to the box mounting surface 1 for mounting the box B and the surface opposite to the box mounting surface 1 by bringing the back surface 51 of the box B into close contact. A pair of magnet assembly mounting surfaces 2 symmetrical to the center line E is provided. The pair of magnet assembly mounting surfaces 2 is located on a plane perpendicular to the box mounting surface 1 and has arcs C ₁ and C ₂ at positions symmetrical to the center line E, respectively. The surface is formed in a concave shape on the front hand surface 3 parallel to the box mounting surface 1. The pair of magnet assembly attachment surfaces 2 are connected by a convex curved surface 4, and the most protruding portion at the center in the longitudinal direction of the convex curved surface 4 exists on the extended surface of the front hand surface 3. Incidentally, the radius R of the arc-shaped magnet assembly body mounting surface 2 is smaller than the box fixture F fixable box B by a pole P ₂ of minimum radius (D _2/2).

  As shown in FIGS. 3, 4, and 6, the thickness of the pair of magnet assembly attachment surfaces 2 is the total length of the pair of magnet assembly attachment surfaces 2 in the fixture body A. In addition, a deep hole portion 5 opened on the side of the box mounting surface 1 is formed so as to be constant, and each portion divided into three by the pair of hole portions 5 in the fixture body A is A plurality of (three in the embodiment) screw lower holes 7 into which screws 6 for fixing the fixture main body A in close contact are screwed are formed on the back surface of the box B along the longitudinal direction. The depth of the screw lower hole 7 is set so that the thickness of the front face 3 where the screw lower hole 7 is formed is the same as the thickness of the magnet assembly mounting surface 2 (FIGS. 3 and 4). reference). The pair of magnet assembly attachment surfaces 2 of the box fixture F have long holes 9 through which the connecting bolts 8 for attaching the magnet assembly G in a connected state to the magnet assembly attachment surface 2 are inserted. A pair of guide protrusions 11 are formed on both sides of each long hole 9. A fitted portion 12d formed on the back surface of the magnet holder 12 of the magnet assembly G is fitted between the pair of guide ridges 11 and connected to the pair of guide ridges 11 and the fixture main body A. Each magnet assembly G is prevented from finely moving in the width direction of the fixture body A in a state where the magnet assembly G is connected and fixed via the bolts 8. 3 and 4, the fixture main body A is fitted between the flange portions 52 formed on the entire peripheral edge of the back surface of the box B. (L) corresponds to the inner dimension of the flange portion 52 in the width direction of the box B.

  Further, as shown in FIGS. 7 to 10, the magnet assembly G has a configuration in which a rectangular thick plate-like magnet body M is housed in a shallow box-shaped magnet holder 12. The magnet body M is composed of a “neodymium magnet” having a high magnetic flux density and a strong magnetic force, and is housed in the magnet holder 12 in a state surrounded by a yoke 13. The yoke 13 of the embodiment is formed by opposing a pair of folded portions 14 along the longitudinal direction by folding both ends of the short-shaped hot rolled steel plate (SPHC) in the same direction in the same direction. Then, it passes through the center S of the magnet body M accommodated therein, and has a symmetrical shape with respect to a straight line perpendicular to the surface Ma of the magnet body M in a sectional view (see FIG. 10). In a state where the magnet body M is accommodated between the pair of bent portions 14 of the yoke 13 and the yoke 13 and the magnet body M are stored in the magnet holder 12, the front end surface of each bent portion 14 of the yoke 13. 14 a slightly protrudes from both the surface Ma of the magnet body M and the open end surface 12 a of the magnet holder 12. The back surface 12b of the magnet holder 12 is formed in an arc surface corresponding to the shape of the arc-shaped magnet assembly mounting surface 2 formed in the box fixture F, and the back surface of the magnet holder 12 formed in the arc surface. 12b is formed on the pair of magnet assembly attachment surfaces 2 of the box fixture F by remaining portions formed by forming a pair of rectangular recesses 12c along the width direction of the box fixture F in the attached state. It becomes the to-be-fitted part 12d fitted between a pair of guide protrusions 11 made. The function of the fitted portion 12d is as described above. Further, in the housing recess 12g of the magnet holder 12, the magnet body M is housed in a state of being covered with the yoke 13, and the distal end surface 14a of the bent portion 14 of the yoke 13 is in the housed state. It protrudes from the surface Ma (see FIG. 10).

The magnet assembly G is composed of a magnet body M, a magnet holder 12 and a yoke 13, and the magnet body M, the bottom plate portion 12e of the magnet holder 12 and the bottom plate portion 15 of the yoke 13 are aligned in the assembled state. The through holes 16, 15 a, 12 f to be formed are formed, and the connecting bolts are connected to the through holes 16, 15 a, 12 f that match in the assembled state from the magnet assembly mounting surface 2 side of the fixing body A. 8 is inserted, and the fixing body is fixed by screwing between the protruding portion of the connecting bolt 8 and the nut 17 disposed in the hole 5 formed on the box mounting surface 1 side of the fixing body A. A magnet assembly G is attached to A so as to be slidable along the curved surface of the magnet assembly mounting surface 2 having an arcuate surface shape. The connecting bolt 8 inserted through the through hole 16 formed in the magnet body M is made of non-magnetic stainless steel in order to prevent it from being magnetized to the magnet body M and hindering the rotation operation. Is formed. In a state where the magnet assembly G is attached to the fixture main body A, the pair of bent portions 14 of the yoke 13 arranged in parallel to each other are in a direction perpendicular to the longitudinal direction of the fixture main body A. Be placed. In addition, the part by the side of the surface Ma of the through-hole 16 formed in the magnet body M becomes cone shape corresponding to the shape of the head of the connection bolt 8, and the head of the connection bolt 8 is the magnet body. It does not protrude from the surface Ma of M. Then, the nut 17 is loosened and the pair of magnet assemblies G are moved in the direction of approaching or separating from each other along the arcuate magnet assembly mounting surface 2 to change the arrangement position. When each magnet assembly G is attached to the magnet assembly mounting surface 2 again via the connecting bolt 8 and the nut 17, the distance (N) between the pair of magnet assemblies G (see FIG. 10) is the arc surface. A pair of magnets that are changed by moving along the magnet assembly mounting surface 2 and are a crossing angle of the extended surfaces of the surfaces Ma of the pair of magnet bodies M constituting the pair of magnet assemblies G. The inclination angle (θ) of the magnet body (see FIG. 10) is changed. Thereby, the box B can be fixed to the poles P ₁ (P ₂ ) having different outer diameters (D) by the same box fixture F. Reference numeral (D) shown in FIG. 10 is a outer diameter of a typical pole P, the outer diameter of the pole P ₁ (P ₂₎ shown in FIGS. 3 and 4, respectively (D ₁₎ , (D ₂ ).

FIG. 10 shows the outer diameter (D) of the pole P, the distance (N) between the centers of the pair of magnet assemblies G, and the crossing angle of the extended surfaces of the surfaces Ma of the pair of magnet bodies M arranged in an inclined manner. The relationship with the inclination angle (θ) of a certain pair of magnet bodies is shown. In FIG. 10, the distance (N) between the centers S of the magnet bodies M constituting the pair of magnet assemblies G that are in contact with the pole P and are magnetically attached is expressed by the following equation. Here, the “interval (N) between the centers S of the pair of magnet bodies M” accurately refers to the center S of the surface Ma of the pair of magnet bodies M in the cross-sectional view, and with respect to the surface Ma. This is the distance between two points S ′ where the vertical straight line and the outer circumference of the pole P intersect. In FIG. 10, C ₀ indicates the center of the pole P.
N = D × cos (θ / 2)

In FIG. 10, “the distance (N) between the centers S of the pair of magnet bodies M” is independent of the positions of the arc centers C ₁ and C ₂ of the magnet assembly mounting surface 2 of the fixture body A. [N = D × cos (θ / 2)] is determined only by the outer diameter (D) of the pole P and the inclination angle (θ) of the pair of magnet bodies M. Therefore, as long as the height of each bent portion where the opposite side portions are bent in the same direction is the same, the yoke 13 has a symmetrical cross-sectional shape and is independent of the outer diameter (D) of the pole P. In other words, regardless of the inclination angle (θ) of the pair of magnet bodies M, with respect to the extension line of the line segment J connecting the center (C ₀ ) of the pole P and the center S of the surface Ma of the magnet body M. Arranged symmetrically. Therefore, the surface Ma of the pair of magnet bodies M is disposed in the tangential direction of the outer peripheral surface of the pole P. Therefore, regardless of the outer diameter (D) of the pole P, the tip end surfaces 14a of the two bent portions 14 of the yoke 13 are in contact with the outer peripheral surface of the pole P.

  Further, as shown in FIGS. 8, 9 and 11, fulcrum shaft portions 18 are respectively provided on each side surface in the short direction of the magnet holder 12 constituting the magnet assembly G, and A magnetism release lever K is rotatably attached to the magnet holder 12 through a fulcrum shaft 18. The magnetic release release lever K has a U-shape, and the operation lever portion 22 is connected to the connection plate portion 21a of the connection frame portion 21 arranged with a slight gap outside the three side surfaces of the magnet holder 12. However, it is the structure extended in the opposite side to the extension direction of a pair of opposing board part 21b of the said connection frame part 21. As shown in FIG. The fulcrum shaft portions 18 provided on the outer sides of the lateral sides of the magnet holder 12 are inserted into and supported by the pair of opposing plate portions 21b disposed on the outer sides of the lateral sides of the magnet holder 12. A shaft insertion hole 23 is formed. Further, the opposing surface of each opposing plate portion 21b of the connecting frame portion 21 is opened on the opposite side to the side where the magnet body M of the magnet assembly G is disposed, and is attached to the shaft insertion hole 23. Groove portions 24 are formed. Each assembly groove portion 24 formed on the opposing surface of each opposing plate portion 21b of the coupling frame portion 21 is provided with a magnetic adhesion release lever K for the pair of fulcrum shaft portions 18 formed on the magnet holder 12 of the magnet assembly G. This is to facilitate the assembly of the connecting frame portion 21. That is, with each counter plate portion 21b of the connecting frame portion 21 being slightly expanded, each fulcrum shaft portion 18 of the magnet holder 12 is inserted from the opening side of each assembly groove portion 24, and the state is left as it is. When the connecting frame portion 21 and the magnet assembly G are relatively close to each other so that the magnet assembly G is disposed between the connecting frame portions 21 of the magnetic release lever K, the pair that has expanded. When the counter plate portion 21b of the magnet holder 12 is restored to the original shape, the fulcrum shaft portions 18 of the magnet holder 12 are respectively inserted into the shaft insertion holes 23 formed in the counter plate portions 21b of the coupling frame portion 21 of the magnetism release lever K. Are inserted into the magnet assembly G, and the magnetism release lever K is rotatably connected to the magnet assembly G.

The operation lever portion 22 constituting the magnetic adhesion release lever K has a pair of side plate portions 22b at the both ends along the opposing direction of the pair of opposing plate portions 21b of the connecting frame portion 21 in the top plate portion 22a. It is connected at right angles toward the direction of the open end of 24. The operation lever portion 22 of the magnetism release lever K is provided with a magnet assembly release lever K for removing the box fixture F magnetically attached to the pole P by a pair of magnet assemblies G from the pole P. When rotating with respect to the appendix G, the pair of side plate portions 22b are arranged outside the side surfaces 10 of the fixture main body A, and the top plate portion 22a of the operation lever portion 22 is the front surface 3 of the fixture main body A. as it can be rotated until it abuts against the inner width W ₂ of the pair of side plate portions 22b is wider than the width W ₁ of the fixing device body a.

Next, a case where the box B is fixed to a plurality of poles P ₁ (P ₂ ) having different outer diameters using the above-described box fixing tool F will be described. 1 to 3 show an example in which the box B is fixed to a pole P ₁ having a maximum outer diameter that can be fixed by the box fixing tool F. FIG. As shown in the fixing principle diagram of the box fixture F in FIG. 10, in a state where the box B is fixed to the pole P by the magnetic attractive force of the pair of magnet assemblies G constituting the box fixture F, The surface Ma of the pair of magnet bodies M is arranged in the tangential direction of the outer peripheral surface of the pole P, and the center of the magnet body M (intersection of two diagonal lines of the surface Ma of the square-shaped magnet body M) S The perpendicular T passing through needs to pass through the center C _{0 of the} pole P. From this, since the outer diameter (D) of the pole P and the inclination angle (θ) of the pair of magnet bodies M are known in advance, the equation [N = D × cos (θ / 2)] The distance (N) between the centers S of the pair of magnet bodies M (or the pair of magnet assemblies G) corresponding to the outer diameter (D) of the pole P is calculated. And a pair of magnet assembly G is attached with respect to the magnet assembly attachment surface 2 comprised by the circular arc surface of the fixing body A so that the space | interval of the center S of a pair of magnet body M may become (N). Slide and fix each magnet assembly G to the fixture body A using the connecting bolt 8 and the nut 17 at the set position.

As shown in FIGS. 1 to 3, the box is attached to the box mounting surface 1 of the box fixture F in which the distance between the pair of magnet assemblies G is adjusted corresponding to the outer diameter of the pole P _1. A screw pilot hole formed in the box mounting surface 1 of the fixture main body A with the back surface 51 of B closely attached, and inside the box B, a plurality of screws 6 inserted through the bottom plate portion 53 of the box B are formed. 7, the box B can be attached to the box attachment surface 1 of the fixture main body A via the plurality of screws 6. The number of box fixtures F attached to the box B as viewed from the box B is determined by the magnetic attraction force of the pair of magnet bodies M, the weight of the box B, etc., and is shown in FIGS. Thus, when viewed from the side of the box B, the box fixing tool F attached to the back surface of the box B takes into account the stability of the fixed box B and is attached to each of the upper and lower ends of the back surface 51 of the box B. It is preferable to attach them one by one.

Next, in a state in which the box B is attached to the box attachment surface 1 of the fixture body A of the pair of upper and lower box fixtures F, the pair of box fixtures F and the pole P ₁ face each other. The box B is moved along the radial direction of the pole P ₁ , and the pair of box fixtures F are placed on the outer peripheral surface of the pole P ₁ . Thereby, the box B is fixed to the pole P ₁ through the pair of box fixtures F by one touch by the magnetic attractive force of the pair of magnet assemblies G provided in each box fixture F. Here, since the inclination angles (θ) of the pair of magnet bodies M constituting each box fixture F are the same, the box B is fixed to the pole P ₁ via the pair of box fixtures F. In this case, the box B is always arranged along the axial direction of the pole P ₁ and is not inclined with respect to the axial center.

In the state in which the box B is fixed relative to the pole P _1, the end faces of the coupling frame 21 of the magnetically attached release lever K, as well are in close proximity without contact with the outer peripheral surface of the pole P _1, the operation lever portion 22 Is formed with an acute crossing angle (α ₁ ) with respect to the front surface 3 of the fixture body A, and the entire operation lever portion 22 is disposed in front of the front surface 3 of the fixture body A, The pair of magnet bodies M with respect to the pole P ₁ are arranged so as to extend in the tangential direction of the magnetized portions. In other words, the pair of left and right magnetic release levers K release the magnetic attachment by the pair of magnet bodies M and remove the box B from the pole P ₁ while the box B is fixed to the pole P ₁ (P ₂ ). In this case, it is arranged at a position where it can be operated by a human hand.

When the box B is fixed to the pole P ₁ by the magnetic attractive force of the pair of magnet bodies M, the magnet assembly G is configured as shown in the fixing principle diagram of the box fixture F in FIG. only the front end surface 14a of the two bent portions 14 of the yoke 13 which is in contact with the outer peripheral surface of the pole P _1, between the outer peripheral surface of the surface Ma and Paul P ₁ of the magnet body M, a slight clearance Since δ is formed, the surface Ma of the magnet body M does not directly contact the outer peripheral surface of the pole P ₁ . Here, since the distance N between the centers S of the pair of magnet bodies M is calculated by the above formula, each magnet body M has a slight gap δ with respect to the outer peripheral surface of the pole P _1. In this state, the surface Ma of the magnet body M is parallel to the tangential direction of the outer peripheral surface of the pole P ₁ (see FIG. 10). As a result, all of the bent portion 14 of the four tips face 14a of the yoke 13 of the pair of the magnet M is, comes into contact with the outer peripheral surface of the pole P _1. In addition, each bent portion 14 of the yoke 13 is along the axial direction of the pole P ₁ , and the tip surface 14a of each bent portion 14 is in contact with the pole P ₁ over the entire length. The contact state of the yoke 13 with respect to P ₁ is stable. As a result, the fixed state of the box B fixed to the pole P ₁ is stabilized by the magnetizing force of the pair of magnet bodies M. In addition, in a state where the box B is fixed to the pole P ₁ , the pair of bent portions 14 of the yoke 13 that covers the outside of the magnet body M is disposed along the axial direction of the pole P ₁ .

Here, when the magnet body M is brought into direct contact with the outer peripheral surface of the pole P ₁ , magnetic attachment is possible, but most of the magnetic flux flows through the abutting portion of the magnet body, and voids in the magnet body M are formed. However, if the surface Ma of the magnet body M and the outer peripheral surface of the pole P ₁ are not in contact with each other as described above, the entire surface of the magnet body M and the magnetic metal pole P _{1 can be obtained.} As a result, a large magnetic attraction force (magnetization force) is obtained as compared with the case where the magnet body M is brought into direct contact with the pole P ₁ . Further, since the magnetic attractive force acting between the magnet body M and the pole P ₁ is inversely proportional to the square of the distance between the magnet body M and the outer peripheral surface of the pole P _1, the magnet body M is the pole P It is desirable to make the gap between the outer peripheral surface of the pole P ₁ as small as possible on the condition that it does not contact ₁ . Further, since the magnet body M is not in contact with the outer peripheral surface of the pole P ₁ directly, damage of the magnet M by abutting, even breakage can be prevented. 1 and 2, reference numeral 54 denotes a cover of the box B, and reference numeral 55 denotes a hinge connecting portion between the box B and the cover 54.

On the other hand, in order to fix the box B to the pole P _{2 having} an outer diameter smaller than that of the pole P ₁ , the magnet assembly G is fixed to the fixture body A as shown in FIG. The connection bolt 8 and the nut 17 are loosened, and the distance N between the centers S of the pair of magnet bodies M is made larger than in the case of the pole P ₁ so as to correspond to the pole P _2. Then, the pair of magnet assemblies G are fixed respectively. Then, in the same manner as if the pole P _1, by magnetically attached a pair of the magnet M with respect to the outer peripheral surface of the pole P _2, the box B to the pole P ₂ via a pair of box fasteners F Fix it.

Here, as can be understood from the comparison between FIG. 3 and FIG. 4, the inclination angle (θ) of the pair of magnet bodies M increases as the outer diameter of the pole P increases. In the above example, the relationship (θ ₁ > θ ₂ ) is established. Θ ₁ and θ ₂ are the maximum and minimum inclination angles of the box fixture F of the present embodiment, respectively. Therefore, in the state where the box B is fixed to the pole P ₂ via the two sets of box fixtures F that are one-on-one, the intersection between the magnetic adhesion release lever K and the front face 3 of the fixture body A is formed. The angle (α ₂ ) is larger than the intersection angle (α ₁ ) when the box B is fixed to the pole P ₁ .

Here, in FIGS. 3 and 4, C ₀₁ and C ₀₂ are the centers of the poles P ₁ and P ₂ , respectively, and each of the pair of left and right magnet assembly mounting surfaces 2 provided on the fixture main body A. Since they are arranged at positions different from the arc centers C ₁ and C ₂ , in the state where the box B is magnetically attached to the outer peripheral surfaces of the poles P ₁ and P ₂ via the box fixture F, the poles P ₁ , since no Megura boxes fixture F with respect to P _2, not Megura boxes B against same poles P _1, P _2. This configuration also contributes to stabilization of the fixed state of the box B with respect to the pole P ₁ .

Further, the outside of the magnet body M is covered with the yoke 13, and in this state, the pair of magnet assemblies G in which the magnet body M is housed in the magnet holder 12 are determined by the outer diameters of the poles P ₁ and P _2. It is securely attached to the fixture body A via the connecting bolt 8 and the nut 17 with the inclination angles θ ₁ and θ ₂ . In other words, in a state where the box B is fixed to the poles P ₁ and P ₂ , the pair of magnet assemblies G are integrally attached to the fixture main body A, and are attached to the fixture main body A. Thus, the pair of magnet assemblies G does not wobble or slightly move. For example, when a pair of magnet assemblies G wobble or slightly move with respect to the fixture body A, a pair of magnets magnetically attached to the poles P ₁ and P ₂ when an unexpected force is applied to the box B. The box B slightly moves with respect to the magnet assembly G, and the magnetic attachment of the pair of magnet assemblies G to the poles P ₁ and P ₂ is easily released. However, as described above, when the pair of magnet assemblies G are integrally attached to the fixture body A, as a result, the pair of magnet assemblies G and the box B are integrally formed. Due to the attachment, the occurrence of the fine movement is eliminated, and the box B is not easily detached from the poles P ₁ and P _{2 due} to an unexpected force acting on the box B.

On the other hand, the box B magnetically attached to the magnetic metal pole P ₁ (P ₂ ) through the two pairs of magnet bodies M in one-to-one pair is removed from the pole P ₁ (P ₂ ). It's not easy. Correspondingly, the box fixing tool F of the invention of claim 1 is provided with a pair of left and right magnetic adhesion release levers K, so that the operation lever portion 22 of the magnetic adhesion release lever K is fixed in FIG. pressed against the side of the tool body a, a state wherein the magnetically attracted release lever K around the fulcrum shaft portion 18 provided on the magnet holder 12 is rotated, which is arranged tangentially to the outer circumferential surface of the pole P ₂ in the side of the distal end portion 21c of the magnet body M of each facing plate portion 21b of the coupling frame 21 in proximity to the outer peripheral surface is pressed against the outer circumferential surface of the pole P _2. In this state, when the magnetism release lever K is further rotated against the magnetizing force of the magnet body M, the pole P ₁ (P ₂ ) of the tip 21c of each counter plate 21b is accordingly accompanied. The pressing point against the opposite plate portion 21b is shifted to the distal end side of the counter plate portion 21b, and in the middle, first of the distal end surfaces 14a of the pair of bent portions 14 of the yoke 13, the bent portion on the distal end side of the connecting frame portion 21 14 of the distal end surface 14a and the magnetic attraction between the pole P ₁ (P ₂₎ is be released, which then is magnetically attached is released with another of the distal end surface 14a and the pole P ₁ (P _2), the outer periphery of the pole P ₂ directly to the distal end face 14a of the bent portion 14 of the yoke 13 which has been in contact it is forcibly separated from the outer peripheral surface of the pole P ₂ to the surface. That is, since the release of the magnetic attachment to the pole P ₁ (P ₂ ) of each tip surface 14a of the pair of bent portions 14 of the yoke 13 is performed separately in time, the box for the pole P ₁ (P ₂ ) The removal of B can be performed relatively easily in consideration of the magnitude of the magnetic force that fixes the box B to the pole P ₁ (P ₂ ) only by the magnetic force.

  And since the release operation is more reliable when the left and right pair of magnetism release levers K are operated simultaneously than the individual operation, the operator is positioned at a position facing the cover 54 of the box B. It is preferable to operate the pair of magnetic release levers K simultaneously with the left and right hands.

Here, in the paragraph “0025”, in the inclined arrangement state of the pair of magnet bodies, if the surface of each magnet body is arranged in the tangential direction of the pole, as long as the cross-sectional shape of the yoke is symmetrical, It was proved that the front end surface of each bent portion was in contact with the outer peripheral surface of the pole. 12 and 13, the pair of left and right yokes 73 constituting the pair of magnet assemblies G of the box fixture F are poles P ₁₁ and P ₁₂ (P ₁₃ and P ₁₄ ) having different outer diameters. When each of the yokes 73 is provided with two poles P ₁₁ and P ₁₂ (P ₁₃ and P ₁₄ ) in a state in which the box fixing tool does not rotate when it is brought into contact with the outer peripheral surface of each of the yokes 73. In order for the front end surfaces 74a of the four bent portions 74 to come into contact with the outer peripheral surfaces of the poles P ₁₁ and P ₁₂ (P ₁₃ and P ₁₄ ), the magnet assembly shown in FIGS. The arc centers C ₂₁ and C ₂₂ (C ₂₃ ) of the body mounting surface are different from the centers C ₁₁ and C ₁₂ (C ₁₃ and C ₁₄ ) of the poles P ₁₁ and P ₁₂ (P ₁₃ and P ₁₄ ). It explains in general terms what is necessary. FIG. 12 is a schematic view when there are two arc centers C ₂₁ and C _{22 of the} magnet assembly mounting surface indicated by reference numeral (2) as in the above embodiment, and FIG. center C ₂₃ is a schematic view of a (if arc center C ₂₃ of each magnet assembly body attaching surface of the left and right are common) that there is only one. 12 and 13, the straight line indicated by 63 indicates “the front surface of the fixture main body”. Note that the yoke 73 has a thick line display (skeleton display).

In FIG. 12, when the outer diameter of each of the poles P ₁₁ and P ₁₂ changes, the tip surface 74a of the bent portion 74 of the yoke 73 is centered on the arc centers C ₂₁ and C ₂₂ of the magnet assembly mounting surface. The pole P ₁₂ with the larger outer diameter approaches the front surface 63 of the fixture body and the distance between the pair of yokes 73 is reduced. It can be seen that all of the surface 74a is in contact with the outer peripheral surfaces of the poles P ₁₁ and P ₁₂ . Moreover, since the centers C ₁₁ and C _{12 of the} poles P ₁₁ and P ₁₂ and the arc centers C ₂₁ and C _{22 of} the magnet assembly mounting surface are arranged at different positions, the poles P ₁₁ and P ₁₂ On the other hand, the yoke 73, that is, the box fixture does not rotate. Also, the example shown in Figure 12, there is closer to the embodiments in the pair of magnet assembly body mounting surface 2 with a respective individual arc center C _1, C _2, the pole P _11, P ₁₂ The extension line of the line segment connecting the centers C ₁₁ and C ₁₂ is a perpendicular bisector of the line segment connecting the arc centers C ₂₁ and C ₂₂ of the pair of left and right magnet assemblies. In FIG. 12, reference numeral 81 denotes a locus of the tip surface 74a of the yoke 73 that contacts the poles P ₁₁ and P ₁₂ having different outer diameters centered on the arc centers C ₂₁ and C ₂₂ of the magnet assembly mounting surface. Indicates an arc.

Also in FIG. 13, except that the arc center C ₂₃ of the pair of left and right magnet assembly body mounting surface is common, indicating that similar to FIG. 12. The arc center C ₂₃ has been placed in the center C _13, C ₁₄ and different positions of the respective pole P _13, P _14, located on an extension of a line connecting the respective centers C _13, C ₁₄ Yes. Here, when the arc center C ₂₃ common to the pair of left and right magnet assembly mounting surfaces and the center C ₁₃ (C ₁₄ ) of one of the poles P ₁₃ and P ₁₄ coincide with each other, the box fixture Is rotated with respect to a pole having the same center as the arc center C ₂₃ common to the pair of left and right magnet assembly mounting surfaces. In FIG. 13, 82 indicates a circular arc which is the locus of the tip end face 74a of the yoke 73 in contact with the different external diameter poles around the arc center C ₂₃ of the magnet assembly body mounting surface.

  The box fixture F according to the first aspect of the present invention is configured to be used by attaching the box B to the box mounting surface 1. However, as in the case of the fifth aspect of the present invention, Even if a box fixing part having the same configuration as the box fixing tool F is integrally attached, the box can be fixed to the pole with a single touch, and if a magnetic release lever is provided, The box can be easily removed.

  Further, the box fixing tool according to the invention of claim 1 is used to fix the box to a magnetic metal pole, or the box integrally provided with the box fixing tool according to the invention of claim 5 is fixed to the pole. In this case, there are two types of poles, one for standing on the construction site and one for permanent installation. Both poles can be used, but they must be removed after the completion of construction. When used for a temporary pole, there is a particular advantage that the box can be easily removed from the temporary pole.

  In addition, for the box fixture according to the invention of claim 1, the box is fixed only to the temporary pole using the box fixture according to the invention of claim 1, and for the permanent pole, The option of fixing the box for a long time by another fixing means is possible.

A: Fixture body
B: Box
C ₁ , C ₂ , C _{21 to} C ₂₃ : Center of arc of magnet assembly mounting surface C ₀ , C ₀₁ , C ₀₂ , C _{11 to} C ₁₄ : Center of pole
F: Box fixture
G: Magnet assembly
K: Magnetic adhesion release lever (magnetic release release part)
M: Magnet body
Ma: surface of magnet body P, P ₁ , P ₂ , P _{11 to} P ₁₄ : magnetic metal pole
θ: Angle of inclination of a pair of magnet bodies
δ: Clearance between the surface of the magnet body and the outer peripheral surface of the pole
1: Box mounting surface
2: Magnet assembly mounting surface
9: Long hole
12: Magnet holder
13, 73: York
14, 74: Yoke bent portion
14a, 74a: front end surface of the bent portion of the yoke
21: Connecting frame portion of the magnetic release release lever
22: Magnetic lever release lever operation lever

Claims (5)

A box fixing tool for fixing a box to a magnetic metal pole formed in a columnar shape,
A box mounting surface to which the box is mounted, and a pair of magnet bodies magnetically attached to the outer peripheral surface of the pole;
A box fixture for a pole, wherein the pair of magnet bodies are arranged such that the other magnet body is inclined with respect to one magnet body so as to be magnetically attached along the outer peripheral surface of the pole.   The relative inclination angle of the pair of magnet bodies can be adjusted according to the outer diameter of the pole, and is fixed so that the inclination angle can be maintained before and after the adjustment. The box fixture to the pole according to claim 1, wherein the box can be magnetically attached to the pole.   The pair of magnet bodies are housed in a yoke whose opposite side portions are bent to the same side, and the front end surface of the bent portion serves as a contact surface with respect to the pole. In a state where the box is fixed to the pole via the pair of magnet bodies in an arrangement along the direction, the front end surface of the yoke contacts the outer peripheral surface of the pole, and the surface of the magnet body and the outer peripheral surface of the pole The box fixing tool to the pole according to claim 1 or 2, wherein the front end surface of the yoke protrudes from the surface of the magnet body so that a gap can be formed therebetween.   A magnetic release unit for forcibly releasing the magnetic attachment of the pair of magnet bodies to the pole in a state where the box is attached to the pole by magnetic attachment of the pair of magnet bodies to the pole; The box fixture to the pole according to any one of claims 1 to 3. It is a box that is integrally provided with a box fixing part on the back side, and is fixed to a pole made of magnetic metal formed in a columnar shape,
The box fixing portion includes a pair of magnet bodies magnetically attached to the outer peripheral surface of the pole,
The box fixed to the pole, wherein the pair of magnet bodies are arranged such that the other magnet body is inclined with respect to one magnet body so as to be magnetically attached along the outer peripheral surface of the pole.

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