JPH0337653B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a coupling device for tightening and coupling two or more members of mechanical parts or various structures using bolts and nuts.

BACKGROUND ART As a coupling device as described above, for example, the one shown in FIG. 6 is known. This is two parts 10
1,102 respective bolt holes 103,104
A bolt 105 is inserted into both the bolt holes 103 and 104 from the member 102 side, and a nut 106 is screwed into the threaded portion of the bolt 105 protruding from the bolt hole 103 to connect the two members 10.
1,102 are tightly connected.

Problems to be Solved by the Invention By the way, in the above device, the nut 10
6 with a tightening tool such as a spanner, there is a risk that the bolt 105 may spin freely, so the head of the bolt 105 must be held with a similar tightening tool such as a spanner. Therefore, bolt 105
If the work space on the head side of the bolt is narrow, the work will be extremely difficult and inefficient, and if the members 101 and 102 are large, it will require a person to tighten the nut 106 as described above and a person to hold the head of the bolt 105. There were problems such as the need for two workers.

This invention was made in view of the above problems, and even if the working space on the bolt head side during tightening work is narrow, the work will not be hindered at all, and the work can be easily performed by one worker. The object of the present invention is to provide a coupling device that can perform the following steps.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention is characterized by adopting the following configuration.
That is, two or more overlapping members are tightly connected by a nut and a bolt having a substantially rectangular parallelepiped head that protrudes oppositely from the end opposite to the bolt axis in a direction intersecting the bolt axis. Of the two or more members, the member on the head side of the bolt is provided with a first opening having a substantially similar shape that is slightly larger than the planar shape of the head of the bolt, and the threaded portion of the bolt The side member is provided with a second opening that is larger than the first opening, and can be inserted into the second opening, but cannot be inserted into the first opening, and comes into contact with the edge of the first opening. A flange is provided on the shaft portion of the bolt located in the second opening when two or more members are tightened, and a flange is provided on the shaft portion of the bolt located in the second opening, and a portion of the outer periphery is provided from the flange to the distal end side of the threaded portion over a length protruding from the second opening. An engaging part with a notch is provided, and two parts are provided between the nut and the member on the threaded part side of the bolt.
A pair of split and non-circular washers is interposed, and a bolt insertion hole formed on the surface of one washer facing the other washer engages with the engaging portion. An engaging part for preventing rotation of the bolt is provided,
Further, an engaging protrusion that engages with the outer edge of these washers to prevent rotation of the washers is provided around the second opening of the member on the threaded portion side of the bolt.

Action To join two or more members, insert the head of the bolt into the first opening of the member that is the head side of the bolt, bring the head into contact with the rim of the first opening, and then pull it out. After preventing this, you can use the usual method of inserting the second opening of the member that will become the threaded side of the bolt into the bolt and overlapping it. It is also possible to insert the head of the bolt after overlapping the bolts. In this case, after inserting the bolt head from the second opening into the first opening, the bolt can be rotated around the axis and the bolt head can be brought into contact with the rim of the first opening in the same manner as above. to prevent it from slipping out.

Next, a pair of washers are inserted into the engaging protrusion and inserted into the threaded part protruding from the second opening, and the engaging part provided on one of the washers is engaged with the engaging part provided on the threaded part. After that, when a nut is screwed onto the threaded part from above these washers, the bolt will engage with the engaging part provided on the threaded part and the engaging part provided on the washer, and the outer edge of the washer and the threaded part of the bolt will tighten. Since it is prevented from rotating by engagement with the engagement protrusion provided on the side member, it is moved to the nut side, and the member is tightened by its head and the nut to form a tight connection. In this way, the operator only has to insert the bolt through the opening of two or more members stacked on top of each other in advance, prevent it from coming off, and then screw the nut together and tighten, making the work very simple. Further, since there is only enough space on the head side of the bolt to accommodate the head, the work can be carried out satisfactorily even in a narrow work space.

Embodiment Figures 1 and 2 show an embodiment of the present invention. In both figures, 1 and 2 are plate-shaped members tightened by bolts 5 and nuts 6, and the members 1 and 2 each have a bolt-insertion hole. Rectangular openings 3 and 4 are bored. The width W of the short side edge of one opening 3 is larger than that W' of the other opening 4. As shown in FIGS. 3A and 3B, the bolt 5 has a threaded portion 5b at one end of the shaft portion 5a and a head 5c at the other end, and the head 5c has a direction perpendicular to the bolt axis. It has a rectangular parallelepiped shape. Although the opening 3 of the member 1 can be inserted into the joint between the shaft portion 5a and the threaded portion 5b of the bolt 5, the opening 4 of the member 2
The opening 4 cannot be inserted therethrough, and is provided with an annular flange 5d that comes into contact with the edge of the opening 4.

Further, the bolt 5 has an engaging portion 5f in which a part of the outer periphery is cut out over a desired length from the connecting portion of the threaded portion 5b with the flange 5d to the distal end side of the threaded portion 5b. As shown in FIG. 4, reference numerals 9 and 10 are two square washers, and the bolt insertion hole of one washer 9 has an engaging portion 11 for preventing rotation of the bolt that engages with the engaging portion 5f of the bolt 5. is provided. moreover,
As shown in FIG. 5, 13 is an engagement protrusion provided around the opening 3 of the member 1, which engages with the outer edges of the washers 9 and 10 to prevent the washers from rotating.

As mentioned above, in this embodiment, the engagement is achieved by the engagement between the engagement portion 5f of the bolt 5 and the engagement portion 11 of the washer 9, and the engagement between the outer edges of the washers 9 and 10 and the engagement protrusion 13 of the member 1. This constitutes a structure for preventing the bolt 5 from spinning idly.

In order to connect the members 1 and 2 in the above, the bolt 5 is inserted from above into the opening 4 of the member 2 from the head 5c side. Upon insertion, once the flange 5d of the bolt 5 comes into contact with the edge of the opening 4, the bolt 5 is rotated 90 degrees to prevent the head 5c from coming out of the opening 4. After that, the opening 3 of the member 1 is inserted into the threaded portion 5b of the bolt 5 protruding from the opening 4 of the member 2,
Lay member 1 on member 2. In this state, the head 5c of the bolt 5 is brought close to the member 2, and the washer 9,
10 is inserted into the engaging protrusion 13, and the engaging part 11 provided on the washer 9 is engaged with the engaging part 5f of the threaded part 5b to prevent the bolt from rotating. The nut 6 is screwed onto the threaded portion 5b from above the nut 10. Then, as you proceed to screw nut 6, bolt 5
tries to rotate together with the nut 6 due to the friction of the screw, but the engaging portion 5f of the threaded portion 5b and the engaging portion 11
The outer edges of the washer 9 and the washer 10 that engage with the engaging protrusion 13 of the member 1 prevent idle rotation, so that the nut is moved toward the nut 6 and hits the rim of the opening 4 of the member 2. The members 1 and 2 are tightened by the head 5c and the nut 6, which come into contact with each other, to tightly connect them.

Effect of the invention Since this invention consists of the above-mentioned configuration, 2.
In addition to making the work of tightening and tightening the above-mentioned parts with bolts and nuts much more efficient than before, the flange provided on the shaft of the bolt when inserting the head of the bolt into the opening of the part The bolt comes into contact with the rim of the opening of the member on the side, and can reliably prevent the bolt from falling in the insertion direction, making it particularly effective for work at high places in terms of work safety.
Further, the second opening is formed larger than the first opening,
and the engagement between the engaging portion provided on the threaded portion of the bolt to prevent rotation and the engaging portion provided on the washer, and the engagement between the outer edge of the washer and the engaging protrusion provided on the member on the threaded portion side of the bolt. Since this is done by engagement, it is possible to insert the bolt after overlapping two or more members so that the first and second openings match, and when inserting the bolt after this overlapping, Even if the part that becomes the threaded part of the bolt is large and has a large area, and there are many fastening points,
Once you have fastened at least two places, you can easily match the openings at other fastening places, so insert bolts in advance into all the fastening places and fit all the openings of the member at the same time. This is not necessary, and has the excellent effect that when two or more members are piled up, the bolt can be easily inserted and fastened through the opening from the member side which is the threaded portion of the bolt.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention, FIG. 2 is a cross-sectional plan view taken along the line - in FIG. 1, FIG. 3 shows the same bolt, A is a front view,
B is a left side view, FIG. 4 is a plan view of the two-piece washer shown above, FIG. 5 is a plan view of FIG. 1, and FIG. 6 is a longitudinal sectional front view of the conventional example. 1, 2... Member, 3, 4... Opening, 5... Bolt, 5
a... Shaft portion, 5b... Threaded portion, 5c... Head, 5d... Flange, 5f... Engaging portion, 6... Nut, 9, 10...
Washer, 11... engaging portion, 13... engaging protrusion.

Claims (1)

[Scope of Claims] 1. Two or more overlapping bolts, each having a substantially rectangular parallelepiped-shaped head that protrudes oppositely from the end opposite to the threaded portion in a direction intersecting the bolt axis, and a nut. This is a device for tightly connecting members, in which of the two or more members, the member 2 on the side of the bolt head 5c has a first opening 4 having a substantially similar shape that is slightly larger than the planar shape of the bolt head. provided,
In addition, the member 1 on the threaded portion 5b side of the bolt has a first
A second opening 3 larger than the opening is provided, and a flange 5 that can be inserted into the second opening but cannot be inserted into the first opening and comes into contact with the edge of the first opening.
d is provided on the shaft portion 5a of the bolt located in the second opening when two or more members are tightened, and is provided over a length protruding from the second opening 3 from the flange 5d to the distal end side of the threaded portion 5b. An engaging part 5f with a part of the outer periphery cut out is provided, and a pair of washers 9 split into two and formed in a non-circular shape are provided between the member 1 on the threaded part side of the bolt and the nut 6. 10 is interposed, and the bolt insertion hole formed on the surface of one washer 9 facing the other washer 10 has an engaging portion 5f.
A member in which an engaging portion 11 for preventing rotation of the bolt that engages with the bolt is provided, and an engaging protrusion 13 that engages with the outer edges of these washers 9 and 10 to prevent rotation of the washers is on the threaded portion side of the bolt. 1. A member joining device using a bolt/nut, characterized in that the device is provided around a second opening 3 of a first member.