JPH03209002A - Binding device of member with bolt and nut - Google Patents

Abstract

PURPOSE:To attempt to facilitate binding work at a time of narrow working space on a head part side by providing a first opening similar in its form to a head part planar shape and a little larger in its size than the same on the bolt head part side and a second opening larger than the same on a screw side, and providing a flange part nonpassable through the first opening and becoming to a turn-stop and an engaging part to the shank part of the bolt. CONSTITUTION:A first opening 4 a little larger than a planar shape of a head part 5c and similar thereto is provided to a member 2 on the head part 5c side of a bolt 5, and a second opening 3 larger than the first opening 4 is provided to a member 1 on a screw part 5b side of the bolt 5. Moreover, a flange 5d passable through the second opening 3 and nonpasable through the first opening, and abutting on an opening edge of the first opening 4 and being positioned in the second opening 3 at a time of binding, and a turn-stopping engaging part 5e being positioned in the first opening 4 and engaging with long side edge parts at the time of binding are provided to the shank part 5a of the bolt 5. Therefore, it is possible to stop turning without a fall of the bolt 5, to work efficiently even if working space on the head part 5c side is narrow, and to make a construction simplified.

Description

[Detailed Description of the Invention] The above invention provides two methods for mechanical parts or various structures.
The present invention relates to a coupling device for tightening and coupling the above members with bolts and nuts.

As a coupling device as described above, for example, the one shown in FIG. 3 is known. This is done by aligning the bolt holes 103 and 104 of the two members 101 and 102, inserting the bolt 105 into both bolt holes 103 and 104 from the member 102 side, and then inserting the bolt 105 protruding from the bolt hole 103. A nut 106 is screwed onto the threaded portion to tightly connect the two members 101 and 102.

However, in the above device, when tightening the nut 106 with a wrench or other tightening tool, there is a risk that the bolt 05 may spin freely. Therefore, if the working space on the head side of the bolt 105 is narrow, the work will be extremely difficult and inefficient.
If the bolt 02 was large, there would be problems such as the need for two workers, one to tighten the nut 106 and the other to hold the head of the bolt 105.

This invention was made in view of the above-mentioned 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 done by one worker. It is an object of the present invention to provide a coupling device capable of performing the following.

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-shaped head that protrudes oppositely to each other in a direction intersecting the bolt axis at the end opposite to the threaded part. 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; A second opening larger than the first opening is provided in the side member, and the second opening can be inserted through the second opening.
A flange that cannot be inserted into the first opening and that comes into contact with the mouth edge of the first opening is provided on the shaft of the bolt that is located in the second opening when two or more members are tightened, and An engaging portion for preventing rotation of the bolt, which is located within the first opening and engages with the long side edge of the first opening during tightening, is provided on the outer periphery of the shaft portion of the bolt.

To join two or more members, insert the head of the bolt into the first opening of the member that will be the head side of the bolt, and
It comes in contact with the rim of the opening to prevent it from slipping out, and
After the retaining part is engaged with the long side edge of the first opening to prevent the bolt from rotating, the member that will be the threaded part of the bolt is inserted into the second opening.
In addition to the usual method of inserting openings into bolts and overlapping them, it is also possible to do this by first overlapping two or more members so that the first and second openings match, and then inserting the head of the bolt. method is possible. 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. In addition to preventing the bolt from coming off, the retaining part is engaged with the long side edge of the first opening to prevent the bolt from rotating.

Next, when a nut is screwed onto the threaded portion of the bolt protruding from the second opening, since the bolt is prevented from rotating as described above, it does not rotate together due to the screwing of the nut, and its head and nut Tighten the parts to make 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 and tighten the nut, making the work extremely 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.

Figures 1.2 and 1.2 of "L" Group show an embodiment of this invention.
Reference numeral 2 denotes a plate-shaped member tightened by bolts 5 and nuts 6, and each of the members 1 and 2 has a rectangular opening 3.4 through which the bolt is inserted. The width W of the short side edge of one opening 3 is larger than that W' of the other opening 4. The bolt 5 has a threaded portion 5b at one end of the shaft portion 5a and a head 5c at the other end.
has a rectangular parallelepiped shape oriented perpendicular to the bolt axis. The opening 3 of the member 1 can be inserted into the joint between the shaft part 5a and the threaded part 5b of the bolt 5, but the opening 4 of the member 2 cannot be inserted, and the annular flange 5d that abuts the edge of the opening 4 is inserted. It is provided. Also, the flange 5d is connected to the member 2.
When it comes into contact with the edge of the opening 4 of the member 2, the outer periphery of the shaft portion 5a protruding from the opening 4 of the member 2 in the direction opposite to the member 1 has a length of one side slightly smaller than the width W' of the opening 4 and a cross section. An engaging protrusion 5e having a square surface is provided, and opposing edges of the engaging protrusion 5e engage with opposing edges of the long side of the opening 4. 7 is a washer. 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. When inserting, bolt 5
When the flange 5d comes into contact with the edge of the opening 4, the bolt 5
Rotate 90' so that the head 5c comes out A' from 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, and the member 2 is closed.
Overlay member 1 on the . When the head 5c of the bolt 5 approaches the member 2 in this state, the opposing edges of the engagement protrusion 5e of the bolt 5 engage with the opposing edges of the long side of the opening 4. The engaging protrusion 5e comes to fit into the opening 4, and the bolt 5 is prevented from rotating idly.

When the nut 6 is screwed onto the threaded portion 5b of the bolt 5 which has been prevented from rotating as described above via the washer 7, and the screwing of the nut 6 is continued, the bolt 5 does not rotate together with the screwing of the nut 6,
, the head 5c comes into contact with the edge of the opening 4 of the member 2.
and the nut 6 to tighten the member 1.2 to make a tight connection.
In the above, the nut 6 may be screwed after the head 5c of the bolt 5 is brought into contact with the edge of the opening 4 of the member 2 in advance.

Since this invention has the above-mentioned configuration, the work of tightening two or more members with bolts and nuts and tightening them is much more efficient than in the past. When inserting the bolt into the opening of the member, the flange provided on the shaft of the bolt comes into contact with the rim of the opening of the member that is the head side of the bolt,
It can reliably prevent the bolt from falling in the direction of insertion, and is particularly effective in terms of work safety when working at heights.
Further, the second opening is formed larger than the first opening, and the bolt is prevented from rotating by engaging a retaining portion provided on the outer periphery of the shaft portion of the bolt with the long side edge of the first opening. Tame, 2
It is possible to insert the bolt after overlapping the above members so that the first and second openings match, and when inserting the bolt after this overlapping, it is possible to insert the bolt on the threaded side of the bolt. Even if the member is large and has a large area, and there are many fastening points, once at least two fastening points are completed, the openings of the other fastening points can be easily matched, so all the fastening points, It is not necessary to insert the bolt in advance and fit all the openings of the member at the same time, but when two or more members are stacked, it is easy to insert the bolt from the threaded side of the bolt through the opening. bolts can be inserted and fastened. Furthermore, as mentioned above, it is only necessary to provide the engaging part that prevents the bolt from rotating at one location on the outer periphery of the bolt shaft, which has the excellent effect of simplifying the structure and making manufacturing easier. .

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the present invention, FIG. 2 is a transverse plan view taken along line 1--2 in FIG. 1, and FIG. 3 is a longitudinal sectional front view of a conventional example. 1, 2... Member 3, 4... Opening 5... Bolt 5a... Shaft portion 5b... Threaded portion 5c... Head 5
d...Flange 5e...Engaging protrusion (retaining part) 6.
・・Nut 7・Atsushi Wasana 2nd edition 3rd drawing

Claims (1)

[Scope of Claims] 1. A bolt having a generally rectangular parallelepiped-shaped head that protrudes oppositely from the end opposite to the threaded portion in a direction intersecting the bolt axis, and 2, which are overlapped by a nut. A device for tightly joining the above members, wherein of the two or more members, the member (2) on the side of the bolt head (5c) has a substantially similar shape that is slightly larger than the planar shape of the bolt head. A first opening (4) is provided, and a second opening (3) larger than the first opening is provided in the member (1) which is on the threaded part (5b) side of the bolt. Although it is possible, it cannot be inserted into the first opening, and the first
The flange (5d) that comes into contact with the edge of the opening is located within the second opening when two or more members are tightened.
a), and an engaging part (5e) for preventing rotation of the bolt, which is located in the first opening (4) and engages with the long side edge of the first opening when two or more members are tightened. Bolt shaft (5a
) is provided on the outer periphery of a member connecting device using bolts and nuts.