JP5502374B2 - Fixing device - Google Patents

Description

The present invention relates to a fixing device that can be preferably used, for example, when adjacent housings constituting a switchboard or the like are fixed to each other.

  As a fixing device for connecting a case such as a conventional switchboard, the top plate of two front switch gear bodies arranged adjacent to each other on the left and right sides of the U-shaped cross section consisting of a bottom plate, a side plate, and an upper plate, respectively Attach the connecting bracket with the bolts for the bottom plate, connect the two side plates with the bolts for the side plate, connect the horizontal plates of the front and rear connecting brackets with long holes formed in the upper plate, and connect them to both front bodies As with the case of the top plates of the two main body of the front side, attach both connecting brackets with the bolts on the top plate of the two rear switchgear bodies that are aligned on the back side and juxtaposed side by side. In some cases, a longitudinal plate bolt is inserted into both long holes of the longitudinal plates of both the front and rear front and rear connection fittings to connect the front and rear connection fittings (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 9-117020 (first page, FIG. 1)

  In the conventional fixing device as described above, in order to easily insert the bolt, it is generally necessary to make an insertion hole larger than the diameter of the bolt in the fixing portion of the frame or the like. The washer was also provided with a large through-hole taking into account the positional deviation, and the contact surface was formed flat. The joining of the two housings in such a configuration makes it difficult to connect the bolts and the nuts due to insufficient fixing power of the washer such as a side slip of the washer and mismatch of the centers of the insertion holes provided in the frame. . Moreover, since the diameter of the insertion hole of the joining frame is large and the joining surface of the washer is flat, there is a problem that the joining strength between the connected casings is weak.

  The present invention has been made in order to solve the above-described problems of the prior art, and has as its first object to provide a washer that can prevent a side slip at the time of mounting and can be easily mounted. It is a second object of the present invention to provide a fixing device that can be easily connected and has high bonding strength between connected members.

The fixing device according to the present invention is a fixing device in which a first member and a second member are integrally coupled to each other via a coupling surface by a fastener penetrating through an insertion hole provided in each fixing portion. 1, a dish-shaped first inclined seating surface is formed around the insertion hole in the fixing portion of the first member, and is interposed between the fastener and the fixing portion of the first member. A first protrusion having a substantially conical inclined surface that engages with the first inclined seating surface and a ring-shaped flat surface formed around the first protrusion are provided. And a plate that is symmetrical with respect to the first inclined seating surface and the coupling surface of the fixing portion of the first member around the insertion hole in the fixing portion of the second member. A second inclined seat surface is formed, and is interposed between the fastener and the fixing portion of the second member. The second of the second second projection and the ring-shaped flat portion formed around the second protrusion having a substantially conical inclined surface engaging the inclined bearing surface is provided A washer is provided, wherein the inclination angle of the first inclined seating surface is matched with the inclination angle of the first inclined surface constituting the first protrusion, and the second inclination By matching the inclination angle of the seating surface with the inclination angle of the second inclined surface that constitutes the second protrusion, the first member and the second member by the fastener are coupled to each other in the first state. The ring-shaped flat surface portion formed on the washer and the flat surface portion of the fixing portion of the first member are brought into contact with each other, and the ring-shaped flat surface portion formed on the second washer and the first member The flat portion of the fixed portion is in contact with the flat portion .

According to the fixing device of the present invention, the first protrusion having the substantially conical inclined surface provided on the first washer interposed between the fastener and the fixing portion of the first member is the first. Since it is positioned so as to fit into the dish-shaped first inclined seating surface provided in the fixed part of the member, the center of the through hole of the washer and the center of the insertion hole provided in the fixed part of the first member are Since it is easily matched, the rigidity of the joint portion can be increased, and the second washer interposed between the fastener and the fixing portion of the second member is symmetrical to the first inclined seat surface. A second protrusion that fits into a second inclined seating surface formed on the fixed portion of the second member is provided , and the first member and the second member are coupled to each other by the fastener. The ring-shaped flat portion formed on the washer and the flat portion of the fixing portion of the first member are brought into contact with each other, and the second washer Since the the flat portion into abutment on the fixed part of the made a ring-shaped the flat portion and the first member, smoothly accompanied by centripetal action in each of the fixed portion of the first member and the second member Thus, a fastening device that can perform a secure fastening operation can be obtained.

The fragmentary sectional view which shows the principal part of the washer which concerns on Embodiment 1 of this invention, and the fixing device which concerns on Embodiment 1 of this invention using the washer. The side view which shows the washer shown by FIG. The bottom view which shows the washer shown by FIG. The perspective view which shows the fixing | fixed part of the fixing device shown by FIG.

Embodiment 1 FIG.
Hereinafter, a washer according to Embodiment 1 of the present invention and a fixing device according to Embodiment 1 of the present invention using the washer will be described with reference to FIGS. In the figure, the fixing device includes a first member 1A made of a casing constituting an adjacent closed switchboard and the like, and a fixing portion 2 made of a frame having a substantially L-shaped cross section for connecting the second member 1B to each other, 3, bolts 41 inserted through insertion holes 2 a, 3 a passing through the protruding sides of the fixing portions 2, 3 protruding rightward in FIG. 1 in the vertical direction of the figure, and nuts 42 screwed into the bolts 41. Between the fastener 4 made of the bolt 41, the head 41a of the bolt 41 and the locking surface 2b of the fixing portion 2, and the fixing surface (the upper surface in the figure) of the nut 42 and the locking surface 3b of the fixing portion 3. It is comprised by a pair of washers 5 interposed by.

  The fixed portion 2 is fixed to a predetermined portion of the first member 1A by welding or the like, and the fixed portion 3 is fixed to a predetermined portion of the second member 1B by welding or the like. In addition, an inclined seat surface 2c made of a counterbore face formed by chamfering as shown in FIG. 4 is recessed in the periphery of the insertion hole 2a provided in the fixing portion 2 on the locking surface 2b side. Furthermore, in this example, a plurality of concave portions 2d are provided radially on the inclined seat surface 2c. The fixed portion 3 is also processed in exactly the same manner as the fixed portion 2, and an inclined seat surface 3c and a concave portion 3d are provided as shown in FIG.

  In addition, in FIG. 4, although the length of the fixing | fixed part 2 and 3 in the depth direction is displayed short, it is not limited to this, For example, it continued along the 1st member 1A and the 2nd member 1B. It may be formed in a length. Furthermore, it goes without saying that the number of insertion holes 2a (3a) provided in the fixing portions 2 and 3 is more than the number necessary for maintaining strength. Moreover, although the fixing | fixed parts 2 and 3 were comprised by another members, such as an angle material, and the example attached to 1st member 1A and 2nd member 1B by welding etc. was shown, it is not limited to this. For example, the fixed portion may be a portion formed by bending a plate material constituting the wall surface of the housing.

  Further, as shown in FIGS. 2 and 3, the washer 5 according to Embodiment 1 of the present invention passes through one surface 5b formed in a direction orthogonal to the through hole 5a of the ring-shaped washer body 51. The protrusion 5c which has the substantially cone-shaped inclined surface formed along the circumference | surroundings of the hole 5a is provided. In this example, a plurality of minute protrusions 5d are radially formed on the protrusion 5c. The slope of the protrusion 5c of the washer 5 is formed at the same inclination angle as that of the inclined seat surface 2c of the fixed portion 2, and the protrusion 5c of the washer 5 is fitted into the inclined seat surface 2c of the fixed portion 2. When mounted in such a manner, the locking surface 2b of the fixed portion 2 and the ring-shaped flat portion of the one surface 5b of the washer 5 are in contact with each other. The other surface 5e is formed in a planar shape here.

  Next, the operation of the first embodiment configured as described above will be described. Note that the procedure itself for connecting the first member 1A and the second member 1B with each other's fixing portion is the same as that of the prior art. For example, the protrusion 5c of the washer 5 is placed on the locking surface 2b side of the fixing portion 2. The washer 5 is positioned and fixed in the insertion hole 2a, and the lower washer 5 of FIG. 1 is similarly positioned toward the locking surface 3b of the fixing part 3 so that the washer 5 is positioned and held in the insertion hole 3a. In this state, the bolt 41 is inserted downward from the top of FIG. 1, the nut 42 is screwed from the tip of the bolt 41, and tightened with a fastening tool (not shown). The order of the upper washer 5 can be changed as appropriate, for example, after the upper washer 5 is first inserted through the bolt 41 and then inserted into the insertion hole 2a (3a), and then the lower washer 5 and the nut 42 are attached.

  In the above operation, a protrusion 5c having a substantially conical inclined surface formed around the through hole 5a is provided on one surface 5b formed in a direction orthogonal to the through hole 5a of the washer body 51, An inclined seat surface 2c recessed in a dish shape is formed around the insertion hole 2a provided in the locking surface 2b of the fixed portion 2, so that the protrusion of the washer 5 when the washer 5 is mounted. 5c easily enters the inclined seating surface 2c of the fixed portion 2, and at the same time, the center hole is positioned. In addition, a plurality of minute protrusions 5d are formed radially on the protrusion 5c, and a plurality of recesses 2d are provided radially on the inclined seat surface 2c, so that the circumferential direction by mutual biting when fixed by the fastener 4 is provided. The locking force can be increased.

  As described above, according to the first embodiment, when the washer 5 is placed on the insertion hole 2a portion of the fixing portion 2, the protruding portion 5c having a substantially conical inclined surface provided on the washer 5 is fixed to the fixing portion. 2 so that the center of the through-hole 2a and the center of the through-hole 5a can be easily matched with each other because the insertion hole 2a is easily fitted into the inclined seat surface 2c formed to be recessed around the engaging surface 2b. be able to. Therefore, the bolt 41 can be easily inserted, and the diameters of the insertion hole 2a and the through hole 5a can be made smaller than those of the conventional one. As a result, it is possible to obtain such an effect that the strength of the joint portion is increased and the rigidity can be enhanced. Therefore, the fixing device having the fixing portion configured using the washer 5 has high bonding strength and the rigidity of the bonding portion is enhanced.

  In the first embodiment, the other surface 5e opposite to the one surface 5b formed in the direction orthogonal to the through hole 5a of the washer body 51 is a simple flat surface. The periphery of the through-hole 5a of 5e may be chamfered to provide a dish-shaped inclined surface so that the bolt 41 can be easily inserted into the through-hole 5a from the other surface 5e side. Further, the concave portion 2d (3d) provided on the inclined seat surface 2c (3c) may be a convex portion or may be omitted. Further, the minute protrusion 5d provided on the protrusion 5c may be a recess or may be omitted. Furthermore, although the case where the fastener 4 was comprised with the volt | bolt 41 and the nut 42 was demonstrated, it is not limited to this. Needless to say, when a screw hole that is screwed into the bolt 41 is screwed into the fixing portion 3, the nut 42 and the washer 5 on the nut 42 side can be omitted.

  Furthermore, in Embodiment 1 described above, the case where the first member 1A and the second member 1B are casings of a closed switchboard has been described, but the present invention is not limited to this. Moreover, although the 1st member 1A and the 2nd member 1B demonstrated both having a box-shaped structure, it cannot be overemphasized that a structure and a shape are not limited and it can implement similarly even if it is mutually different. For example, when one of the first member 1A and the second member is a container and the other is a lid, or when one is a gantry and the other is a member or device fixed to the gantry, various members It can be applied to the fixed part.

  1A 1st member, 1B 2nd member, 2, 3 fixing part, 2a, 3a insertion hole, 2b, 3b locking surface, 2c, 3c inclined seating surface, 2d, 3d recess, 4 fastener, 41 bolt, 41a head Part, 42 nut, 5 washer, 5a through-hole, 5b (one side) surface, 5c protrusion, 5d minute projection, 5e (other side) surface, 51 washer body.

Claims (2)

In the fixing device in which the first member and the second member are integrally coupled to each other via a coupling surface by a fastener that is passed through an insertion hole provided in the mutual fixing portion, the first member is fixed. A dish-shaped first inclined seat surface is formed around the insertion hole in the portion, and the first inclined seat surface is interposed between the fastener and the fixing portion of the first member. And a first washer provided with a first projection having a substantially conical inclined surface that engages with the ring and a ring-shaped flat portion formed around the first projection , A dish-shaped second inclined seating surface that is symmetrical with respect to the first inclined seating surface and the coupling surface of the first member fixing portion around the insertion hole in the fixing portion of the second member. And is engaged with the second inclined seating surface interposed between the fastener and the fixing portion of the second member. Be those substantially the second protrusion and the ring-shaped flat portion formed around the second projection having a conical inclined surface is provided with a second washer provided that, The inclination angle of the first inclined seat surface is matched with the inclination angle of the first inclined surface constituting the first protrusion, and the inclination angle of the second inclined seat surface, and the second By matching the inclination angle of the second inclined surface that constitutes the projection of the ring, the ring-shaped above formed on the first washer in the coupled state of the first member and the second member by the fastener The flat portion and the flat portion of the fixing portion of the first member are brought into contact with each other, and the ring-shaped flat portion formed on the second washer and the flat portion of the fixing portion of the first member are brought into contact with each other. A fixing device characterized by doing so . A plurality of protrusions or a plurality of recesses formed radially on the first and second protrusions are respectively provided, and a plurality of recesses or a plurality of protrusions formed radially on the first and second inclined seat surfaces are provided. fixing device according to claim 1, characterized in that provided.

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