JP3151478U - Terminal drive bolt - Google Patents

Abstract

[PROBLEMS] To not only perform bolt tightening work only by rotational drive from the end side on the back side, but also greatly improve the degree of freedom of the three-dimensional structure of the bolt head side, and at the same time, elements in a narrow place Or the terminal part drive volt | bolt which can construct reliably the fastening fixation between members is provided. An end portion drive bolt includes a screw shaft that has a male screw portion and a head that is larger than the diameter of the screw shaft and is integrated with the screw shaft on one end side of the screw shaft. It consists of a bolt body that has it. A recess 20 or a protrusion for receiving a rotational input of the rotary drive tool is provided on the end wall at the other end of the screw shaft. Bolt tightening work can be performed only by rotational drive from the end side, greatly improving the degree of freedom of the three-dimensional structure on the bolt head side, and at the same time ensuring the fastening and fixing between elements or members in confined spaces . [Selection] Figure 1

Description

  The present invention relates to parts and bolts for fastening and fixing the parts, and more particularly to a terminal drive bolt including a normal bolt with a function added thereto.

  As a machine element for tightening and fixing parts, bolts consisting of a shaft part and head part with a male thread are known, and in various fields such as various machine assembly production, architecture, civil engineering, etc. Used as a physical joining means by tightening and fixing. Usually, a bolt is used by being tightened together with a mechanical element called a nut or by being tightened in a hole (tap) in which a female thread is cut. The bolt includes a full thread in which all the shaft portions are threaded (a full thread), a half screw (medium bolt) in which a thread is cut by a specific length from the tip portion, and the like. Conventionally, Patent Document 1 has proposed a bolt and nut structure in which the tightening force is further improved with respect to a traditional and general bolt structure.

JP 2001-208023 A

  Patent Document 1 proposes a bolt having a parallelogram surface obtained by deforming the tightened surface of the upper polygonal head at an angle of a predetermined angle in the screwing rotation direction of the male screw portion. The bolt of Patent Document 1 is intended to improve the operability such as improving the tightening performance and preventing the fastener from dropping off even if the hand is released during the tightening operation. On the other hand, when fastening and fixing between structural parts by bolts, for example, a bolt shaft is inserted into a bolt through hole provided through a plurality of objects to be fixed, and a nut is screwed in from the end side of the inserted bolt and fixed. Let At this time, when fixing and fixing the plate material of other structural parts such as buildings to a large wall body, the bolt head side and the rear end protruding from the hole cannot be locked simultaneously. One worker locks the nut with a spanner or pliers, and the bolt head worker fits a screwdriver or other tool into the bolt head. The bolt is rotationally driven in the screw tightening direction via the bolt tightening surface to be fastened and fixed. In this case, two-person work is required, and the work cost is increased, the work time is long, and the work efficiency is inferior. In addition, there is a problem that, when the bolt head is tightened, the plus groove for fitting with the driver provided on the bolt head, the minus groove, or the like may be crushed and the tightening force may not function effectively. Furthermore, the head side of the bolt does not always have a head shape having a tightening surface, and the head at the tightening fixing position can be easily covered from the surface side, or the head shape itself can be arbitrarily set. In some cases, it was desired to function as a design or decoration element as a shape.

  The present invention has been made in view of the above-described conventional problems. The purpose of the present invention is to eliminate the need for workers on both the bolt head side and the bolt end side of the insertion destination after inserting the bolt holes. Not only can the bolt tightening work be performed only by the rotational drive from the end side, but the degree of freedom of the three-dimensional structure on the bolt head side is greatly improved, and at the same time fastening between elements or members in a narrow place It is an object of the present invention to provide an end drive bolt that can be securely fixed.

  In order to solve the above problems, the present invention includes a screw shaft 12 in which a male screw portion 16 is screwed, and heads 50 and 102 that are enlarged from the diameter of the screw shaft on one end side of the screw shaft 12 and integrated with the screw shaft. And a distal end end wall 18 on the other end side of the screw shaft 12 provided with a recess 20 or a protrusion 30 that receives the rotational input of the rotary drive tool and rotationally drives the screw shaft. It consists of a part drive bolt 10.

  The recessed part 20 or the protrusion 30 is good to have the to-be-clamped surfaces 40 and 50 each fitted to a rotary drive tool.

  In that case, it is good for the recessed part 20 or the protrusion 30 to be formed in the smaller size seeing in the cross section of the screw shaft 12. FIG.

  Moreover, the head part 50 is good also as having a drive solid structure which has the to-be-clamped surfaces 56a-56f.

  Further, the head 102 may have a three-dimensional structure that does not have a tightened surface.

  According to the terminal portion drive bolt of the present invention, a bolt body having a screw shaft in which a male screw portion is screwed, and a head portion that is larger than the diameter of the screw shaft on one end side of the screw shaft and integrated with the screw shaft. And the other end side end wall of the screw shaft is provided with a recess or a protrusion for receiving rotational input from the rotary drive tool and rotationally driving the screw shaft. That is, it is possible to perform a tightening operation from the end portion (screw end side) of the screw shaft, and it is possible to complete a conventional operation by two persons on the front side and the back side by one person. Further, even in a narrow place where a screwdriver or a spanner does not enter the head of the bolt or where only a small rotation range can be moved, the tightening operation can be performed easily and in a short time from the free space side, for example, in a short time. At the same time, even if the drive hole of the bolt head and the surface to be tightened are damaged and worn, the tightening rotation driving operation from the rear end portion can be continued to complete the tightening. In addition, the screw head can be tightened from both the front and back sides as a conventional end drive type with a plus, minus groove, hexagonal column, etc. By doing so, characters, logo marks, rivets, photographic transfer, engraving, symbol shapes, three-dimensional shapes of characters, etc. can be applied to the head side for use in the interior or decoration of buildings.

  Moreover, since the recessed part 20 or the protrusion 30 has a structure to be fastened to be fitted to the rotary drive tool, the bolt is specifically driven by the input drive by the rotary input tool from the distal end side of the screw shaft. It is possible to drive and tighten from the end portion, that is, the back side in the tightening direction.

  In addition, the recess or protrusion has a smaller size when viewed in the cross section of the screw shaft, so that it is effective even when tightening by screwing a nut from the back side in addition to a hole on the back. It is possible to tighten to.

  In addition, the head has a driving three-dimensional structure having a tightened surface, so that it can be tightened from the head side after mounting a normal bolt, and can also be tightened by driving rotation from the end side of the screw shaft. it can.

  In addition, the head has a three-dimensional structure that does not have a tightened surface, so that it can represent free characters, figures, logo marks, character shapes, etc. on the head side of the bolt. It is possible to perform a decorative function.

It is the whole perspective view seen from the screw shaft end part side of the end part drive bolt concerning a 1st embodiment of the present invention. It is a side view of the terminal part drive volt | bolt of FIG. It is the front view seen from the screw shaft terminal part side of the terminal part drive bolt of FIG. It is the front view seen from the screw shaft end part side which shows the other example of the recessed part of the terminal part drive volt | bolt concerning 1st Embodiment of FIG. It is the front view seen from the screw shaft end part side which shows the other example of the recessed part of the terminal part drive volt | bolt concerning 1st Embodiment of FIG. It is the front view seen from the screw shaft end part side which shows the other example of the recessed part of the terminal part drive volt | bolt concerning 1st Embodiment of FIG. It is the whole perspective view seen from the screw shaft end part side of the end part drive bolt concerning a 2nd embodiment of the present invention. FIG. 3 is a side view of the end portion drive bolt of FIG. 2. It is the whole perspective view seen from the head side of the end part drive bolt concerning a 3rd embodiment of the present invention. It is the front view seen from the screw shaft end part side of the end part drive bolt of FIG. It is a whole perspective view which shows the other example of the head part of the terminal part drive volt | bolt concerning 3rd Embodiment of FIG. It is the front view seen from the screw shaft end part side of the end part drive bolt of FIG. It is a whole perspective view which shows the other example of the head part of the terminal part drive volt | bolt concerning 3rd Embodiment of FIG. It is the front view seen from the screw shaft end part side of the end part drive bolt of FIG. It is a partially-omitted cross-sectional explanatory drawing which shows the example of a fastening structure of the wall part of the building by the terminal part drive volt | bolt of this invention. It is an isometric view explanatory drawing which shows the example of attachment structure of the other board | plate material to the large area board | plate material by the terminal part drive volt | bolt of this invention. It is a partial cross section expanded explanatory view which shows the other example of attachment by the terminal part drive volt | bolt of this invention.

  Embodiments of the end drive bolt of the present invention will be described below with reference to the accompanying drawings. FIG. 1 shows an embodiment of the present invention, and FIGS. 1 to 6 show a first embodiment of a terminal drive bolt according to the present invention.

  1 and 2, the end portion drive bolt 10 of the present invention is constituted by a bolt body having a screw shaft 12 and a head 50. The screw shaft 12 is a straight rod-like screw portion in which a male screw portion 16 having a spiral groove formed on the peripheral surface of a cylindrical member is screwed, and is inserted into or inserted into a bolt hole drilled in an object to be fastened and fixed. The object is tightened and fixed by being screwed. The insertion end of the screw shaft 12 is tightened by being screwed into a nut or a tapped hole having a female screw portion of the same male screw shape. Note that the holes into which the bolts are screwed may be either mekaku holes or through holes.

  The head 50 is a portion that is integrally connected to the screw shaft 12 and has a diameter direction size T that is larger than the diameter N of the screw shaft on the one end 121 side of the screw shaft 12. An enlarged portion, which is opposed to the tightening object and pressed against the plate surface or the like of the tightening object, forms the tightening force application surface 52.

  1 and 2, the head 50 is composed of a short regular hexagonal prism body having six rectangular sides connected to the respective sides of the upper surface 54 having a regular hexagonal shape. Tightened surfaces 56a to 56f that apply a tightening force when the portions are fitted and a rotational force is applied are formed. Here, the head portion 50 of the end portion drive bolt 10 of the embodiment has a drive solid structure that receives a rotational drive force and rotationally drives the screw shaft.

  A characteristic feature of the end portion drive bolt 10 is that the end wall 18 of the end portion 122 on the other end side of the screw shaft 12 is provided with a recess 20 or a protrusion 30 that receives rotation input of the rotary drive tool. is there. In the first embodiment, the regular hexagonal holes shown in FIGS. 1 and 3 are recessed, and only the recesses are provided. Moreover, the recessed part 20 has the to-be-clamped surface 40 fitted to the rotary drive tool which is not shown in figure. The tightening surface 40 is formed, for example, on the side surface of a polygonal column hole, plus, minus shape groove or the like. The regular hexagonal hole is a terminal-side or back-side input receiving means that receives the rotational input of a rotary drive tool such as a hexagon wrench (not shown) and rotates the entire screw shaft 12 in the direction around the axis via the tightened surface 40. The depth of the hole as the recess 20 and the size in the radial direction can be arbitrarily set. If the size in the radial direction is small, screwing friction of the screw shaft is large, and it is difficult to obtain a rotary drive tool having a strength for rotating the screw shaft beyond this frictional force. The radius size is preferably about 0.5 to 0.8 times the radius of the screw shaft 12. The shape of the end wall surface of the recess can be arbitrarily configured as long as it has a tightening surface on the inner side of the hole that can receive rotational input from at least the end wall side of the end portion and rotate the screw shaft. For example, in addition to a regular hexagon, a quadrangle (see FIG. 4), a triangle, a pentagon, and other polygons are conceivable. Moreover, the polygon from which the size of each edge differs may be sufficient. The shape and step in the depth direction of the hole can be set freely. Further, a plus-shaped groove (see FIG. 5) or a minus-shaped groove (see FIG. 6) may be used. As shown in FIGS. 3 to 6, the recess 20 is formed in a size smaller than the size of the cross section when viewed in the cross section of the screw shaft 12.

  When using the above-mentioned end portion drive bolt 10, for example, as shown in FIG. 15, when fixing an assembly member 84 having another flat plate portion 82 on one surface of a building wall 80, the wall 80 and the flat plate portion 82 are fixed. The end drive bolt 10 is inserted into the aligned hole from the end side of the bolt and pushed until it stops at the head 50. If the insertion side of the bolt end portion is the front side, the operator on the back side screws the nut 86 from the end portion side of the threaded screw shaft 12 so that a certain amount of tightening force acts on the wall and the flat plate portions 80 and 82. Screw to the point. The end of the screw shaft 12 protruding from the screwed nut 86 is fitted with the input action portion of a rotary input tool such as a screwdriver, and the end of the screw shaft 12 is stopped with a temporary presser such as an appropriate plier 88. The screw shaft 12 is rotationally driven from the part side. As a result, input from the front side becomes unnecessary as necessary, and screw tightening fixing by rotational drive input from the front side, from the front side and the back side, and from the back side only is possible. For example, when the wall 80 is wide and only a large number of screw fastening holes are first drilled, and then the assembly member is screwed and fixed, the terminal drive bolt of the present application is inserted into the hole from the front side, and the wall is kept in that state. It is possible to perform the tightening operation by driving the end portion from the back side. That is, even a large area screw fastening operation can be completed by one person.

  In addition, as shown in FIG. 16, in the case of attaching another plate material to a large-area plate material, the length L from the attachment position to one end of the plate material is long, and one operator holds the front and back surfaces with both hands. Even when the work cannot be performed at the same time, the distal end drive bolt 10 effectively improves the screw tightening workability.

  Further, in FIG. 17, when the U-shaped frame member 92 is fixed to the wall 90 and the flat plate member 94 is further screwed and fixed to the U-shaped frame member 92 in other manufacturing operations of machine manufacturing, electrical product manufacturing, and automobile manufacturing. For example, in the case of a screw tightening configuration in which the head of the bolt is located on the inner side of the U-shaped frame member 92, the length K between the legs of the U-shaped frame member 92 is small, so that the rotation range of a wrench or the like is narrow. If the bolt cannot be tightened smoothly, it can be screwed easily and smoothly in a short time using a rotary drive tool such as an L-shaped hexagon wrench from the end of the bolt, which is the free space side. Fixing can be realized.

  7 and 8 show a terminal drive bolt 10-2 according to the second embodiment of the present invention. The same members as those of the terminal drive bolt 10 according to the first embodiment are denoted by the same reference numerals, and details are shown. The detailed explanation is omitted. In this embodiment, the rotation input receiving portion of the rotary drive tool on the end wall 18 at the end of the screw shaft 12 is composed of a protrusion 30 protruding outward from the end wall surface. The protrusion 30 has a tightened surface 50 that fits into a rotary drive tool (not shown). The tightening surface 50 is formed on, for example, a side surface of a polygonal column, a plus or minus shape protrusion. The protrusion 30 according to the second embodiment can be configured such that the recess 20 according to the first embodiment protrudes outward from, for example, the end wall surface 18A. For example, the front shape may be a regular hexagon, a quadrangle, a triangle, a pentagon, or another polygon. Moreover, it is good also as a protrusion shape of a plus shape and a minus shape. Further, the protrusion height, radial size, etc. of the protrusion can be arbitrarily set in the same manner as the recessed depth and radial size.

  9 and 10 show a terminal drive bolt 10-3 according to a third embodiment of the present invention. The same members as those of the terminal drive bolt 10 according to the first embodiment are denoted by the same reference numerals, and details are shown. The detailed explanation is omitted. In this embodiment, unlike the first and second embodiments, the head 102 has a three-dimensional structure that does not have a tightened surface, and cannot be rotationally driven from the insertion side of the end of the screw shaft. This is a bolt shaft configuration. In this embodiment, the head portion 102 has an enlarged portion 104 that is enlarged in the radial direction from the diameter of the screw shaft 12, and the side of the enlarged portion 104 that faces the tightening target member is a tightening force application surface. . In the end portion drive bolt 10-3 of the third embodiment, an enlarged portion 104 can be formed on the front side to give free characters, figures, symbols, symbols, insignia, photo prints, blast markings, etc. The part can function as a decorative body, a code, a symbol, a symbol, and a character table itself. In the embodiment, the letter A is displayed, but the head 102 having any configuration described above can be configured. FIGS. 11, 12, 13, and 14 show examples of different modes in the third embodiment. In the examples of FIGS. 11 and 12, the head 102 has a disk shape, and FIGS. In the example, the head 102 is configured in a star shape.

  The terminal drive bolt of the present invention described above is not limited to the configuration of the above-described embodiment, and modifications made without departing from the essence of the invention described in the claims of the utility model registration are also devised. include.

  The terminal drive bolt of the present invention can be used as a physical joining means by fastening in various fields such as machine assembly, construction, civil engineering, and other fields.

10, 10-2, 10-3 End portion drive bolt 12 Screw shaft 16 Male screw portion 18 End wall 18A End wall surface 20 Recess 30 Protrusion 50, 102 Head 52 Tightening force applying surface 104 Enlarged portion 122 End of screw shaft Part

Claims (5)

A screw shaft in which a male screw part is screwed;
A bolt body having, on one end side of the screw shaft, a head that is larger than the diameter of the screw shaft and integrated with the screw shaft,
A terminal end drive bolt characterized in that a recess or a projection for rotating the screw shaft in response to the rotational input of the rotary drive tool is provided on a terminal end wall on the other end side of the screw shaft.   The terminal part drive bolt according to claim 1, wherein each of the recessed part or the projecting part has a tightening surface to be fitted to the rotary drive tool.   3. The terminal portion drive bolt according to claim 1, wherein the concave portion or the projecting portion is formed in a smaller size as seen in a cross section of the screw shaft.   The end portion drive bolt according to any one of claims 1 to 3, wherein the head portion has a drive three-dimensional structure having a tightened surface. The end portion drive bolt according to any one of claims 1 to 3, wherein the head portion has a three-dimensional structure having no tightening surface.

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