JPS626981Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a guide cylinder mounting mechanism in a VTR.

Generally, in a VTR, the guide cylinder is installed in the manner described above.

First, FIG. 1 shows a perspective view of a cylinder mounting base. The cylinder mounting base 1 has cylinder mounting portions 1a, 1a, 1a and chassis mounting portions 1b, 1b, 1b, each having an upper surface inclined at a predetermined angle, which are integrally molded. A screw insertion hole is cut in each mounting part of the cage.

FIG. 2 is a partial cross-sectional view showing the guide cylinder mounted on the cylinder mounting base. The guide cylinder 2 is placed along the slope of the cylinder mounting portion 1a, and is firmly screwed with the screw 3. As shown in FIG.
Furthermore, as shown in FIG. 3, the cylinder mounting base 1 with the guide cylinder attached is screwed to the chassis 4 with screws 3.

Generally, integrally molded aluminum alloy products are used for the above-mentioned cylinder mounting base and chassis, but this is disadvantageous for VTRs, which are desired to be lightweight these days. Resin has come into use.

However, when installing the guide cylinder using resin such as FRP using the method described above, if the screws are tightened too strongly, the compressive stress may exceed the allowable range and cause cracks in the resin, so the tightening strength must be kept constant. It is necessary to

The present invention has been devised in view of the above points, and provides a cylinder mounting mechanism in which the tightening strength of screws can be controlled at a constant level in a cylinder mounting mechanism using resin for the cylinder mounting base and/or chassis. be.

An embodiment of the present invention will be described below with reference to the drawings.

In this embodiment, the cylinder mounting base is made of FRP and the chassis is made of aluminum alloy, and FIG. 4 shows a side sectional view of the chassis mounting portion. cylinder mounting base
A metal cylindrical body 5 is press-fitted into a chassis mounting portion 1b' formed at 1 '. The inner diameter of the cylindrical body 5 is larger than the outer diameter of the screw 3 ', and the screw 3 ' is inserted through the cylindrical body 5. The cylindrical body 5
The height of the chassis mounting portion 1b' is slightly smaller than the thickness of the chassis mounting portion 1b'.

Further, the screw 3 ' has a diameter larger than the outer diameter of the cylindrical body 5 and has an elastic collar portion 3a'.

When the screw 3 ' is tightened, the inner peripheral portion of the flange 3a ' comes into contact with the cylindrical body 5, and the amount of tightening is determined at this position. In this state, the outer peripheral portion of the flange portion 3a' elastically urges the cylinder mounting base 1 ' downward and tightens it.

In this way, the tightening strength of the screw 3' is determined by the difference between the height of the cylindrical body 5 and the thickness of the chassis attachment part, so by keeping this difference constant, the tightening strength can be kept constant. be able to.

In the above-described embodiment, the chassis mounting portion has been described, but the same applies to the cylinder mounting portion.

The present invention can also be applied when the cylinder mount is made of aluminum alloy and the chassis is made of resin, and can also be applied when the cylinder mount is directly attached to a resin chassis without providing a separate cylinder mount.

As described above, according to the present invention, the tightening strength of the screws when installing the guide cylinder can be easily made constant, so that the workability during assembly is improved and is effective.

[Brief explanation of drawings]

Figure 1 is a perspective view of the VTR cylinder mount, Figure 2 is a side sectional view with the guide cylinder installed, Figure 3 is a side sectional view showing the cylinder mount and chassis installed, and Figure 4 is the main body. FIG. 5 is a side sectional view of a mechanism according to an embodiment of the invention before screw tightening, and FIG. 5 is a side sectional view after screw tightening. 1 ′...Cylinder mounting base (resin product), 4...
Chassis (metal base), 3 '...screw, 3a'...flange.

Claims (1)

[Claims for Utility Model Registration] (1) A screw insertion hole provided in a resin product; and a screw that passes through the screw insertion hole and is screwed to the metal base in order to attach the resin product to the metal base; A screw for pressing the resin product toward the metal base with a head, the screw being disposed in the screw insertion hole and having a height lower than that of the resin product. , a metal cylindrical body through which the screw is passed; a flange provided on the head of the screw and having a diameter larger than the screw insertion hole; An inner peripheral portion of the flange that contacts the body and elastically deforms during tightening to contact the resin product and press the resin product with a pressing force corresponding to the difference in height between the resin product and the cylindrical body. A resin product attachment mechanism comprising: an outer peripheral portion of the flange. (2) The resin product mounting mechanism according to claim 1, wherein the resin product is a cylinder mounting base, and the metal base is a chassis. (3) The resin product mounting mechanism according to claim 1, wherein the resin product is a cylinder mounting base, and the metal base is a guide cylinder. (4) The resin product mounting mechanism according to claim 1, wherein the resin product is a chassis, and the metal base is a cylinder mounting base. (5) The resin product attachment mechanism according to claim 1, wherein the resin product is a chassis, and the metal base is a guide cylinder.