JPH0214645Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for attaching a connecting fitting to a light alloy pipe member.

[Conventional technology]

Conventionally, there have been the following structures for attaching a connecting fitting to a pipe member. As shown in Fig. 6, this pipe member 1 is used for a sliding rail on which the seedling stand of a rice transplanter is placed, and is made of light alloy and has a relatively thin pipe wall. It has become a thing. And this pipe member 1
To attach it to the fuselage side, insert the connecting member 5 to which the nut 6 is welded and fixed into the pipe, fix this connecting member 5 to the pipe member 1 with a plain rivet 10, and then attach the nut 6 to the pipe member 1. This is done by fixing the bracket 3 that connects the fuselage side and the pipe member 1 with bolts 7 using bolts 6.

[Problem that the invention attempts to solve]

However, as described above, when the connecting member 5 is fixed with the plain rivet 10, the head 10a of the rivet 10 is exposed on the outer surface of the pipe member 1, so it is necessary to arrange the other member 11 so that it is in close contact with the outer surface of the pipe member 1. When installing it, it is obstructed by the head 10t, causing the inconvenience that it cannot be installed closely.

In addition, in order to eliminate this inconvenience, there is also a means to prevent the formation of protrusions on the outer surface of the pipe by not fixing the connecting fitting to the pipe member, but using it as a member into which bolts are simply screwed together when installing the bracket etc. Although this is possible, the position of the connecting fittings cannot be determined when attaching the bracket, etc., and it becomes more time-consuming.

Another possible solution is to tap the pipe member and bolt the bracket directly to the pipe member, but with this method, even if the pipe wall thickness is increased, the strength will not be improved. This was inferior to those using the above-mentioned connecting fittings.

The present invention has been developed in view of the above circumstances, and is a rational improvement of the mounting structure of the connecting fittings, and does not cause the above-mentioned inconvenience when other members are arranged in close contact with the outer surface of the pipe member. Have a purpose in mind.

[Means for solving problems]

A feature of the present invention is that a guide portion is formed inside a drawn pipe member made of a light alloy for inserting a connecting member having a screwed boss portion from the open end of the pipe, and the inserted connecting member is The position is fixed in the insertion/extraction direction by contact with a protrusion formed inside the pipe member by caulking from the outer surface of the pipe member, and its functions and effects are as follows. .

[Effect]

As mentioned above, since the connecting member is fixed by caulking, in other words, the connecting member can be fixed by simply performing the process using a punch etc. without forming a protrusion on the outer surface of the pipe member. It is positioned by being inserted into the guide part and the protrusion formed inside the pipe.

[Effect of idea]

Therefore, the connecting member can be fixed with a relatively easy process and without forming a protrusion on the outer surface of the pipe member, and the member can be arranged in close contact with the outer surface of the pipe member without any inconvenience. Summer.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on the drawings.

As shown in Fig. 3, a sliding rail 1 made of a drawn pipe member made of light alloy is attached to the machine body side via a bracket 3 provided at the top of a transmission case 2, and is attached to a seedling stand of a rice transplanter. A sliding part is configured.

The sliding rail 1 is configured such that a seedling stand 4 is movably placed on the upper surface of the pipe portion 1a thereof, and a pine-shaped seedling placed on the seedling stand 4 can be received by the plate-shaped portion 1b. There is.

Moreover, the connection between the bracket 3 and the sliding rail 1 is as follows.
This is done via the connecting member 5. That is, as shown in FIGS. 1 to 3, inside the pipe portion 1a of the sliding rail 1, there are a pair of left and right guide portions 1c, 1.
c is formed, a plate-shaped connecting member 5 having a nut 6 fixed thereon as a threaded boss is inserted between the guide parts 1c, 1c and the pipe part 1a, and further the outer surface of the pipe part 1a is By caulking using a punch or the like, the protrusion 1t... is made to protrude toward the inner surface of the pipe portion 1a, and the protrusion 1t is placed against the side edge of the connecting member 5 to determine its position. There is.
Then, the bracket 3 and the sliding rail 1 are connected by inserting the bolts 7 into the holes 1s and 5s drilled in the pipe portion 1a and the connecting member 5, and screwing them into the nuts 6. There is.

[Another example]

In this embodiment, a protrusion 1t was formed on the side edge of the connecting member 5 to perform caulking on the connecting member 5, but as shown in FIG. 5a... is formed in advance, and caulking is performed from the back side of this notch 5a with a punch or the like.
Alternatively, as shown in Fig. 5, instead of local caulking using a punch or the like, the caulking portion R may be formed continuously using a roller or the like having a certain width. May be implemented.

Further, the connecting fitting mounting structure of the present invention may be applied to pipe materials other than sliding rails.

[Brief explanation of drawings]

The drawings show an embodiment of the structure for attaching a connecting fitting to a pipe member according to the present invention, and FIG. 1 is a cross-sectional view of the pipe part, FIG. 4 and 5 are bottom views showing another embodiment, and FIG. 6 is a sectional view showing a conventional example. 1...Pipe member, 1c...Guide portion, 1t...
... Protrusion, 5 ... Connection member, 6 ... Screw-in boss part.

Claims (1)

[Scope of utility model registration request] Guide parts 1c, 1c are formed inside a drawn pipe member 1 made of a light alloy to insert a connecting member 5 having a screw-in boss part 6 from the pipe opening end, and the inserted connecting member 5 is A structure for attaching a connecting fitting to a pipe member, which is fixed in position in the insertion/extraction direction by contact with a protrusion 1t formed inside the pipe member by caulking from the outer surface of the pipe member 1.