JPH0542720U - Positioning device for overlapping members - Google Patents

Abstract

(57) [Summary] [Purpose] To enable accurate positioning when tightening two steel plates with bolts and nuts. [Structure] With the steel plates 1 and 2 having the bolt insertion holes 1A and 2A bored on top of each other, the screw rod 3D of the bolt 3 is inserted into the bolt insertion holes 1A and 2A, and the nut is provided on the tip side of the screw rod 3D. 5 are screwed together, and at this time, the taper portion 3C of the bolt 3 and the taper portion 5D of the nut 5 are connected to the bolt insertion hole 1A,
2A is fitted and the steel plates 1 and 2 are tightened with washers 4 and 6 in a state where they are automatically aligned.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a positioning device for overlapping members, which is preferably used for positioning, for example, two steel plates in a stacked state, and in particular, when the overlapping members are fastened with bolts and nuts, And a positioning device for a superposed member in which the bolt insertion holes of the above can be aligned.

[0002]

[Prior Art]

 In general, a plurality of overlapping members each having a bolt insertion hole formed therein and overlapping each other and a screw rod are inserted into the bolt insertion holes of each overlapping member, and the seat surface of the head is one of the overlapping members. Of the bolt, which is brought into contact with the surface of the overlapping member via a washer, is screwed to the tip end side of the screw rod of the bolt, and the seat surface is brought into contact with the surface of the other overlapping member via the washer, thereby Positioning devices for overlapping members, which include a nut for fastening each overlapping member to the head of the overlapping member, are known.

In this type of prior art positioning device for overlapping members, for example, two steel plates as overlapping members are provided with bolt insertion holes each having a diameter larger than the outer diameter of the threaded rod of the bolt, and each bolt insertion hole is formed. In the state where the steel plates are overlapped with each other so as to coincide with each other, the screw rod of the bolt is inserted into the bolt insertion hole from one steel plate side, and the tip end side of the screw rod is projected from the bolt insertion hole of the other steel plate.

Then, in this state, a washer is inserted into the tip side of the screw rod protruding from the other steel plate, a nut is screwed, and each steel plate is strongly tightened between the nut and the head of the bolt. , Each steel plate is positioned.

[0005]

[Problems to be solved by the device]

 By the way, in the above-mentioned conventional technique, since the hole diameter of the bolt insertion hole formed in each steel plate is larger than the outer diameter of the screw rod of the bolt, the bolt insertion hole of each steel plate is aligned. However, if the bolt insertion holes are misaligned, the steel sheets in the superposed state will be misaligned, and it will not be possible to fix the steel sheets in the correct position.

The present invention has been made in view of the above-mentioned problems of the prior art. The present invention can automatically align the bolt insertion holes when the overlapping members are fastened between the bolts and nuts, and An object of the present invention is to provide a positioning device for a superposed member that can fix the member at an accurate position.

[0007]

[Means for Solving the Problems]

 The feature of the configuration adopted by the present invention to solve the above-mentioned problems is that the screw rod of the bolt has a length dimension larger than the thickness of the washer between the screw rod and the seat surface of the head, and the screw rod side is A tapered portion with a smaller diameter than the bolt insertion hole and a larger diameter on the seat surface side of the head than the bolt insertion hole is provided.On the seat surface side of the nut, an axial protruding length larger than the washer thickness is provided. It has a cylindrical taper portion that has a smaller outer diameter on the distal end side than the bolt insertion hole and a larger outer diameter on the base end side outer diameter than the bolt insertion hole.

[0008]

[Action]

 With the above configuration, when tightening the overlapping members between the bolts and the nuts, the tapered portion of the bolt is fitted into the bolt insertion hole on the side of one overlapping member, and the outer peripheral surface of the tapered portion is the end of the bolt insertion hole. By contacting the portion, the threaded rod of the bolt is aligned with the bolt insertion hole. Further, on the other overlapping member side, the tapered portion of the nut is fitted in the bolt insertion hole, and the outer peripheral surface of the tapered portion comes into contact with the end of the bolt insertion hole, so that the nut is inserted through the screw rod. Centered on the hole.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, reference numerals 1 and 2 denote two steel plates that serve as overlapping members, and bolt insertion holes 1A and 2A having the same hole diameter are formed in the steel plates 1 and 2 in the plate thickness direction. The bolt insertion holes 1A and 2A are formed to have a larger diameter than the outer diameter of a screw rod 3D described later. The steel plates 1 and 2 are superposed so that the bolt insertion holes 1A and 2A are aligned with each other, and are tightened by bolts 3 and nuts 5 described later as shown in FIG. Further, on the lower surface side of the steel plate 1 and the upper surface side of the steel plate 2, the corners 1B and 2B around the bolt insertion holes 1A and 2A become the corner portions 1B and 2B, and the taper portions 3C and 5D, which will be described later, are formed on the corner portions 1B and 2B. It is designed to make contact around the circumference.

Reference numeral 3 denotes a bolt, and the bolt 3 is formed in a short hexagonal columnar shape as shown in FIG. 2, and has a head 3B having a seat surface 3A, and a substantially truncated cone from the seat surface 3A side of the head 3B. Taper portion 3C protruding in a circular shape and gradually reduced in diameter from the base end side to the tip end side, and extending in the axial direction from the tip end side of the taper portion 3C and formed to have a smaller diameter than the bolt insertion holes 1A, 2A. And a male threaded rod 3D. A male thread 3E is formed on the outer circumference of the male threaded rod 3D. Then, the screw rod 3D of the bolt 3 is inserted into the bolt insertion holes 1A and 2A, and the tip end side of the screw rod 3D projects from the bolt insertion hole 2A of the steel plate 2 to the outside.

Further, an annular washer 4 having a predetermined plate thickness is disposed between the head 3 B of the bolt 3 and the lower surface of the steel plate 1, and the washer 4 serves as a seat surface 3 A of the bolt 3. The contact surface area with the steel plate 1 is enlarged, and the tightening force for the steel plates 1 and 2 with the nut 5 is increased. The taper portion 3C of the bolt 3 has an axial length larger than the thickness of the washer 4, and the base end side (the seat surface 3A side) of the taper portion 3C has a larger diameter than the bolt insertion hole 1A. The side (screw rod 3D side) is formed to have a smaller diameter than the bolt insertion hole 1A.

Reference numeral 5 denotes a nut screwed to the tip side of the screw rod 3D of the bolt 3 and fastened with the steel materials 1 and 2 between the head 3B of the bolt 3 and the nut 5 shown in FIG. As shown, the nut body 5B is formed in a short hexagonal column shape and has a screw hole 5A formed on the inner peripheral side, and the nut body 5B is axially projected from the seat surface 5C side, and the inner peripheral side is provided with a screw. The rod 3D has a cylindrical taper portion 5D having a diameter slightly larger than the outer diameter of the male thread 3E, and the outer peripheral surface of the taper portion 5D is gradually reduced in diameter from the base end side to the tip end side. It is formed as a conical tapered surface. An annular washer 6 having a predetermined thickness is disposed between the seat surface 5C of the nut 5 and the upper surface of the steel plate 2, and the washer 6 is similar to the washer 4 in the seat surface 5C and the steel plate. The contact area with 2 is expanded and the tightening force to steel plates 1 and 2 is increased. The tapered portion 5D of the nut 5 has an axial protruding length that is larger than the thickness of the washer 6, and the base end side (the seat surface 5C side) has a larger diameter than the bolt insertion hole 2A and the tip end side. Is formed to have a smaller diameter than the bolt insertion hole 2A.

The positioning device for the steel plates 1 and 2 according to the present embodiment has the above-mentioned configuration, and its operation will be described below.

First, bolt insertion holes 1A and 2A having the same diameter are formed in the steel plates 1 and 2 to be positioned, and the steel plates 1 and 2 are overlapped so that the bolt insertion holes 1A and 2A are aligned. Then, the screw rod 3D of the bolt 3 is inserted into the bolt insertion holes 1A, 2A from the lower surface side of the steel plate 1 through the washer 4, and the tip end side of the screw rod 3D is projected onto the steel plate 2.

Next, in this state, the washer 6 is inserted into the protruding end side of the screw rod 3D, and the nut 5 is screwed onto the screw rod 3D with the taper portion 5D facing downward. When the nut 5 is tightened with respect to the bolt 3, the tapered portion 5D of the nut 5 is fitted into the bolt insertion hole 2A of the steel plate 2 via the washer 6, and the tapered portion 3C of the bolt 3 is fixed to the washer 4 Since it is fitted into the bolt insertion hole 1A of the steel plate 1 via the, the outer peripheral surface of the taper portion 3C contacts the corner portion 1B of the steel plate 1 over the entire circumference, and the threaded rod 3D of the bolt 3 is made of the steel plate 1. The bolt is automatically aligned with the through hole 1A.

The outer peripheral surface of the taper portion 5D of the nut 5 is in contact with the corner portion 2B of the steel plate 2 over the entire circumference, and the nut 5 screwed to the tip end side of the screw rod 3D is inserted through the screw rod 3D. The steel plate 1 is aligned with the bolt insertion hole 1A, and is also aligned with the bolt insertion hole 2A of the steel plate 2 through the tapered portion 5D, whereby the steel plates 1 and 2 are aligned with the bolt insertion hole 1A, 2A is automatically centered, and is strongly tightened between the head 3B of the bolt 3 and the nut 5 via washers 4 and 6. The washers 4 and 6 are strongly clamped between the head 3B of the bolt 3, the nut 5 and the steel plates 1 and 2, thereby increasing the contact area between them and increasing the fastening force between the steel plates 1 and 2. Let

Thus, according to this embodiment, the bolt 3 and the nut 5 are integrally formed with the taper portions 3C and 5D, and the taper portions 3C and 5D are formed around the corner portions 1B and 2B of the steel plates 1 and 2 over the entire circumference thereof. Since the steel plates 1 and 2 are made to come into contact with each other, when the steel plates 1 and 2 are tightened between the bolt 3 and the nut 5, the bolt insertion holes 1A and 2A can be automatically aligned. , 2 can be positioned and fixed at precise positions.

Therefore, prior to fastening the steel plates 1 and 2 with the bolts 3 and the nut 5, it is not necessary to accurately align the bolt insertion holes 1A and 2A in advance, and the fastening work of the steel plates 1 and 2 is simplified. It is possible to improve the workability. In addition, it is possible to surely reduce the burden on the worker, and to significantly reduce the working time, which brings about various effects.

In the above embodiment, the washers 4 and 6 are described as being formed by a single annular plate having an inner diameter larger than that of the tapered portions 3C and 5D, but instead of this, the washer 4 is used. , 6 may be constituted by a plurality of annular plates or spring washers. For example, when a plurality of washers 4, 6 are used, these washers 4, 6 are the head 3B of the bolt 3, the nut 5 and the steel plate. If the number or thickness of the washers 4 and 6 is selected so that the tapered portions 3C and 5D are strongly sandwiched between the washers 1 and 2, and the tapered portions 3C and 5D effectively contact the corner portions 1B and 2B of the steel plates 1 and 2, respectively. Good.

Further, in the above-described embodiment, the case where the bolt 3 is composed of a normal hexagonal bolt and the nut 5 is composed of a hexagonal nut has been described as an example, but the present invention is not limited to this, and for example, the bolt 3 May be constituted by a square bolt, a hexagon socket head bolt, etc., and the nut 5 may be constituted by a square nut, a cap nut, etc.

Further, in the above-described embodiment, the case where the steel plates 1 and 2 are used as the overlapping member has been described as an example, but the present invention is not limited to this, and for example, the bracket portion of one member is attached to the bracket portion of the other member. The present invention can also be applied to the case where parts and the like are overlapped for positioning, and the bolt 3 and the nut 5 enable accurate positioning.

[0023]

[Effect of the device]

 As described above in detail, according to the present invention, the bolt is provided with a taper portion between the seat surface of the head and the screw rod, and the nut has a cylindrical taper portion projecting in the axial direction. The bolt taper and the nut taper are fitted into the bolt insertion hole of each polymerized member when tightening each polymerized member through the washer between the bolt and the nut. By contacting the outer peripheral surface of the taper part with the end of each bolt insertion hole, the bolt insertion hole can be automatically centered, and each overlapping member can be accurately positioned and fixed, greatly improving workability. It has various effects such as being improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a positioning device for a superposed member according to an embodiment of the present invention.

FIG. 2 is an enlarged view of the bolt shown in FIG.

FIG. 3 is an enlarged half cross-sectional view of the nut shown in FIG.

[Explanation of symbols]

 1, 2 Steel plate (overlapping member) 1A, 2A Bolt insertion hole 1B, 2B Corner corner 3 Bolt 3A, 5C Seat surface 3B Head 3C, 5D Tapered part 3D Screw rod 4,6 Washer 5 Nut 5A Screw hole

Claims (1)

[Scope of utility model registration request] 1. A plurality of overlapping members, each of which is provided with a bolt insertion hole, and are overlapped with each other, and a screw rod is inserted into the bolt insertion hole of each of the overlapping members, and a seating surface of a head is formed of each of the overlapping members. Of these, a bolt abutted on the surface of one of the overlapping members via a washer, and screwed to the tip side of the screw rod of the bolt,
In a positioning device for a polymerized member, the seating surface abuts the surface of the other polymerized member via a washer, and a nut for fastening each polymerized member between the head of the bolt and
There is a length dimension larger than the thickness of the washer between the screw rod of the bolt and the seat surface of the head, the screw rod side has a smaller diameter than the bolt insertion hole, and the seat surface side of the head has a bolt insertion side. A tapered portion having a diameter larger than that of the hole is provided, and the seat surface side of the nut has an axial protruding length larger than the thickness of the washer, and the outer circumference on the tip side is smaller than the bolt insertion hole, A positioning device for a superposed member, characterized in that a cylindrical taper portion having a diameter larger than that of the bolt insertion hole is projectingly provided on the outer circumference on the base end side.