JPS6229413Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fixing structure for fixing a lid to an end of a thin cylinder.

A conventional fixing structure of this type will be explained with reference to FIGS. 1 and 2. In Fig. 1, 1 is a thin cylinder, 2
is a plurality of countersinks provided at the end of the thin cylinder 1,
3 is a cylindrical lid body, 4 is a flange portion formed at one end of the lid body 3, 5 is a screw hole provided in the lid body 3 so as to correspond to the countersunk hole 2, and 6 is a countersunk screw. , Fit the lid 3 into the thin-walled cylinder 1 and abut the flange portion 4 against the end face of the thin-walled cylinder 1, align the countersinks 2 and the screw holes 5, and insert the countersunk holes 2 into the screw holes 5, respectively. By tightening the countersunk screws 6, the lid 3 is fixed to the thin cylinder 1 as shown in FIG.

However, according to this conventional fixed structure,
In order to increase the fixing strength, it is necessary to increase the number of countersunk screws, which has the disadvantage of increasing screw tightening work and reducing work efficiency.

Also, the more countersunk screws are used, the more
Manufacturing errors between the countersink hole provided in the thin-walled cylinder and the screw hole provided in the lid body tend to occur, and as a result, the pitch of the countersunk hole and the screw hole does not match, and when the countersunk screw is tightened, the head of the countersunk screw may easily occur. Another drawback was that the screws protruded from the outer peripheral surface of the thin cylinder, defeating the purpose of using the countersunk screws.

The purpose of the present invention is to solve these drawbacks, and for this purpose, radial holes are provided symmetrically on the end side of the thin cylinder, and the lid body is divided into two at the center, each of which is fitted with the hole. Insert both of the divided lid bodies into the ends of the thin-walled cylinder, and insert a fixing plate between the two lid bodies and push them apart to fit the convex part and the hole. The present invention is characterized in that the lid body is fixed to the thin-walled cylinder.

An embodiment of the present invention will be described below with reference to FIGS. 3 to 5.

In FIG. 3, reference numeral 7 denotes a thin-walled cylinder, and holes 8, such as rectangular or circular holes, are provided at radially symmetrical positions on the end side surface of the thin-walled cylinder 7.

9a and 9b are cylinder-shaped lids divided into two at the center, and these lids 9a and 9b are formed in the same shape and have the structure described below. That is, a flange portion 10 is formed at one end of the lids 9a, 9b, and a curved convex portion 11 and a concave portion 12 are provided at the other end on the dividing surface side. A protrusion 13 having the same shape as the hole 8 is formed on each side surface and has a height equal to or less than the wall thickness of the thin-walled cylinder 7, and a groove 14 is provided on each dividing surface. The groove 14 has grooves 15 and 16 provided in the axial direction, a radial groove 17 connecting the grooves 15 and 16, and a bag-shaped groove 17 extending in a direction perpendicular to the center of the groove 17. It consists of a groove 18 and has a shape into which approximately half of one side of a fixing plate, which will be described later, is inserted therein.

Reference numeral 19 denotes a fixing plate having a U-shaped cross section, opposite ends 20 and 21 are each formed into a wedge shape, and a connecting portion 2 connecting the opposite ends 20 and 21.
Claw portions 23 and 24 are formed on both sides of the central portion of the holder 2, and the claw portions 23 and 24 are bent obliquely in the same direction as the rising direction of both end portions 20 and 21.

Next, the assembly of this embodiment will be explained. First, the lids 9a and 9b are faced with their split surfaces, and the convex portions 11 and concave portions 12 are engaged with each other so that they can freely rotate. In this state, as shown in FIG. ,B as shown in the lid body 9
a and 9b are fitted into the end of the thin cylinder 7, and the flange part 10 is brought into contact with the end face of the thin cylinder 7.

Next, as shown in FIGS. 5A and 5B, the lid body 9a,
The axial groove portion 15,1 of the groove 14 formed in the groove 9b
6, the wedge-shaped ends 20 and 21 of the fixing plate 19 are inserted into the ends of the fixing plate 19, and thereby the lids 9a and 9b are expanded in the radial direction around the convex portion 11 and the concave portion 12, and both lids 9a and 9b are expanded. The protrusions 13 provided are fitted into the holes 8 of the thin cylinder 7, and the wedge-shaped ends 20, 21 are completely inserted into the grooves 15, 16, and the connecting part 22 of the fixing plate 19 is inserted into the groove 17. At the same time, the claws 23 and 24 are deformed flat and fit into the bag-shaped grooves 18, respectively.

As described above, the thin cylinder 7 and the lids 9a and 9b are
Fix it with.

In addition, in the above-mentioned embodiment, when increasing the fixing strength, the hole 8 of the thin cylinder 7 and the lids 9a, 9b
The area of the protrusion 13 may be increased, and in that case, the hole 8 and the protrusion 13 may be positioned away from the thin cylinder 7 and the end faces of the lids 9a and 9b, respectively, if necessary.

As explained above, the present invention allows the thin cylinder and the lid to be fixed by simply inserting a fixing plate with wedge-shaped ends into the groove formed in the dividing surface of the lid which is divided into two parts. , compared to the conventional screw-tightened structure, the assembly man-hours can be significantly reduced.
This has the effect of improving work efficiency.

In addition, since the present invention does not use a single screw, processing accuracy is relaxed compared to conventional methods.Moreover, since the protrusion formed on the lid fits into the hole from the inside of the thin-walled cylinder, the outer periphery of the thin-walled cylinder Another effect is that the thin cylinder and the lid can be securely fixed without unnecessary protrusions protruding from the surface.

[Brief explanation of the drawing]

Figure 1 is a vertical cross-sectional view showing a conventional example, and Figure 2 is a vertical cross-sectional view of a conventional example.
3 is an exploded perspective view showing an embodiment of the present invention, FIG. 4A is a vertical sectional view showing the assembly procedure, FIG. 4B is a front view thereof, and FIG. 5A is an assembled FIG. 5B is a longitudinal cross-sectional view showing the completed state, and FIG. 5B is a front view thereof. 7... Thin cylinder, 8... Hole, 9a, 9b... Lid, 10... Flange portion, 11... Convex portion, 12...
... recess, 13 ... protrusion, 14 ... groove, 15,1
6, 17, 18...Groove portion, 19...Fixing plate, 2
0,21...Both ends, 22...Connection part, 23,2
4...Claw part.

Claims (1)

[Claims for Utility Model Registration] A fixing structure consisting of a thin cylinder, a cylindrical lid that fits into the end of the thin cylinder, and a fixing plate for fixing the lid to the thin cylinder. Holes of a predetermined shape are symmetrically provided at the end of the thin-walled cylinder, and the lid body is divided into two parts in the axial direction, each end having a flange portion that abuts against the end surface of the thin-walled cylinder, and each The other end is provided with a convex portion and a concave portion that engage with each other in a rotatable manner, and a protrusion that engages with the hole is formed on each side surface, and both ends of the fixing plate are inserted into the dividing surface of each lid body. A groove is provided, and the fixing plate has a U-shaped cross section and wedge-shaped ends, and the two-part lid is fitted into the end of the thin cylinder with the divided surfaces aligned, and the lid is inserted into the end of the thin cylinder. By inserting both ends of the fixing plate into the groove and expanding the lid body in the radial direction around the convex and concave portions, the projections provided on each lid body are fitted into the holes of the thin cylinder. A fixed structure between a thin-walled cylinder and a lid body.