JP2023125057A - Screw tightening structure and screw tightening method - Google Patents

Abstract

To provide a screw tightening structure and a screw tightening method capable of reliably preventing the idling of a drive fastener to improve the reliability upon device assembly.SOLUTION: A screw tightening structure 10 for fitting a housing frame 12 to a cover 11 of a device main body A includes: a drive fastener 13 which is clinched to the cover 11 of the device main body A via a clinching stopper 15 and a shock mount 16 and which has, at a center, a female screw hole 13A screwed into the housing frame 12; and a fastener plate 14 which has at least two drive fastener setting holes 18 for fixing the drive fastener 13, and is provided so as to couple together the drive fastener setting holes 18.SELECTED DRAWING: Figure 1

Description

Application for application of Article 30, Paragraph 2 of the Patent Act ・Sale date (publication date) July 1, 2021 ・Sales/shipping location NEC Platform Technologies Hong Kong Limited, Suites 901-02, AIA Kowloon Tower, Landmark East, 100 How Ming Street, Kwun Tong, Hong Kong.・Publisher NEC Platform Technologies Hong Kong Limited (Suites 901-02, AIA Kowloon Tower, Landmark East, 100 How Ming Street, Kwun To ng, Hong Kong.)

The present invention relates to a screw fastening structure and a screw fastening method used when fixing a magnetic tape device, which is a device main body, to a housing frame.

A magnetic tape device, which serves as a large-capacity storage medium, is fixed to a housing frame with screws.
For example, in the magnetic tape device 1 shown in FIGS. 14 and 15, the drive fastener 4 is clinched (crimped and joined) in order to be fixed to the housing frame 2.
These figures show that the housing frame 2 is fixed by screws 3 via drive fasteners 4 at two locations on the left and right sides of the magnetic tape device 1 (four locations in total).

At this time, when the magnetic tape device 1 is fixed to the housing frame 2 with the screws 3, the drive fastener 4 must not rotate idly in the radial direction.
For this reason, the iron drive fastener 4 is clinched to the cover 1A of the magnetic tape device 1 via a rubber shock mount and an iron clinching stopper (not shown).
At this time, since the rubber shock mount of the drive fastener 4 is crushed by the clinching process, this serves as a rotation stopper and prevents the drive fastener 4 from idling even if it is tightened with the screw 3.
However, even with such a drive fastener 4, when the tightening torque of the screw 3 exceeds the frictional force with the shock mount, a problem arises in that the drive fastener 4 slips and cannot be fixed by the screw 3.

Regarding such drive fasteners, Patent Document 1 discloses a technique for attaching a cover of a magnetic disk device to a support frame.
A magnetic disk, a magnetic head, a drive mechanism, etc. are housed inside the cover of the magnetic disk device shown in Patent Document 1, and a plurality of attachment parts for attachment to a support frame of an electronic device are provided.
The mounting portion includes a member consisting of a sleeve having a screw hole formed therein, and a vibration isolating portion interposed between the sleeve and the cover of the magnetic disk device.
The vibration isolating portion of the attachment portion is formed of a viscoelastic material, and damps vibrations at a frequency that includes the resonance point of the drive mechanism.

Japanese Patent Application Publication No. 09-251765

However, in the mounting part of the magnetic disk device shown in Patent Document 1, similarly to the drive fastener described above, if the tightening torque of the screw exceeds the frictional force with the mounting part, idling occurs and the screw is not fixed. The problem arises that it is not possible to

The present invention has been made in view of the above-mentioned circumstances, and provides a screw fastening structure and a screw fastening method that can reliably prevent the drive fastener from idling and improve reliability during device assembly. .

In order to solve the above problems, the present invention proposes the following means.
A first aspect of the present invention is a screw fastening structure for attaching a casing frame to a cover of an apparatus main body, which clinches into a hole in the cover of the apparatus main body through a clinching stopper and a shock mount. A drive fastener that is processed and has a female screw hole in the center for a screw to be screwed into the housing frame, and at least two drive fastener installation holes for fixing the drive fastener, and these drive fastener installation holes are connected. A fastener plate provided as shown in FIG.

A second aspect of the present invention is a screw fastening structure for attaching a housing frame to a cover of an apparatus main body, which includes two first female threaded holes formed at a distance from each other, and these first female threaded holes. a drive fastener having a second female threaded hole disposed between the holes, and a screw screwed into the first female threaded hole of the drive fastener to be screwed into the cover of the device main body with a shock mount interposed therebetween; The second female screw hole of the drive fastener is provided with a screw that is screwed into the housing frame.

A third aspect of the present invention is a screw fastening method for attaching a housing frame to a cover of an apparatus main body, the method comprising clinching a hole in the cover of the apparatus main body through a clinching stopper and a shock mount. and at least two drive fastener installation holes for fixing the drive fasteners; and providing a connecting fastener plate.

According to the present invention, since the fastener plate connecting the two drive fastener installation holes is provided, it is possible to reliably prevent the drive fastener from idling and improve reliability during device assembly.

1 is a schematic configuration diagram showing the minimum configuration of a screw fastening structure according to the present invention. FIG. 1 is a perspective view of a magnetic tape device according to a first embodiment of the present invention. FIG. 3 is a perspective view of the magnetic tape device of FIG. 2 viewed from the opposite side. FIG. 4 is a perspective view of the cover of the magnetic tape device shown in FIGS. 2 and 3 viewed from below. FIG. 2 is a detailed perspective view of the screw fastening structure according to the first embodiment. FIG. 2 is a perspective view of a cover provided with a screw fastening structure according to a comparative example of the first embodiment. FIG. 7 is a detailed perspective view of the screw fastening structure shown in FIG. 6; FIG. 7 is a perspective view of a cover of a magnetic tape device in which a screw fastening structure according to a second embodiment of the present invention is installed. FIG. 9 is an exploded perspective view of the screw fastening structure shown in FIG. 8; 10 is a detailed perspective view of the screw fastening structure shown in FIG. 9; FIG. FIG. 7 is a perspective view of a magnetic tape device according to a comparative example of the second embodiment. 12 is an exploded perspective view of the screw fastening structure shown in FIG. 11. FIG. FIG. 13 is a detailed perspective view of the screw fastening structure shown in FIG. 12; FIG. 2 is a perspective view showing a housing frame attached to a magnetic tape device. FIG. 1 is a perspective view showing a general magnetic tape device.

The minimum configuration of the screw fastening structure 10 according to the present invention will be described with reference to FIG. 1.
This screw fastening structure 10 is for attaching a housing frame 12 to a cover 11 of an apparatus main body part A, and has a drive fastener 13 and a fastener plate 14.
The drive fasteners 13 are clinched into the holes 11A of the cover 11 of the main body A of the apparatus through the clinching stopper 15 and the shock mount 16, and two drive fasteners 13 are arranged in the figure.

Further, each drive fastener 13 has a female screw hole 13A at the center for a screw (not shown) that is screwed into the housing frame 12.
Note that the axis of the screw inserted into the female threaded hole 13A of the drive fastener 13 is indicated by the reference numeral 17.

The fastener plate 14 has two drive fastener installation holes 18 for fixing the drive fasteners 13 corresponding to the installation intervals, and is provided so as to connect these drive fastener installation holes 18.

According to the screw fastening structure 10 according to the present invention, since the fastener plate 14 connecting the two drive fastener installation holes 18 is provided, it is possible to reliably prevent the drive fastener 13 from idling and improve reliability during device assembly. can be improved.
In this example, two drive fasteners 13 are fixed by the fastener plate 14, but the number of drive fasteners 13 is not limited as long as it is two or more.

A first embodiment of the present invention will be described with reference to FIGS. 2 to 7.
As shown in FIGS. 2 and 3, the magnetic tape device 100 serving as a magnetic recording/reproducing device includes a tape device main body portion A1 that records/reads data on a magnetic tape, and a tape device main body portion A1 that covers the upper part of the tape device main body portion A1. A cover 101 is provided.

The cover 101 of the magnetic tape device 100 is provided with one screw fastening structure 102 and three screw fastening structures 103.
As these screw fastening structures 102 and screw fastening structures 103, two drive fasteners 20 each having a female screw hole 20A (upper and lower) are installed.
Note that the screw fastening structure 102 and the screw fastening structure 103 have the same basic configuration except for a slight difference in shape, so only the structure of the screw fastening structure 102 will be described below.

4 and 5 are exploded views of the screw fastening structure 102 provided in the magnetic tape device 100.
The screw fastening structure 102 includes two ring-shaped drive fasteners 20, a ring-shaped shock mount 21 and a clinching stopper 22 that are integrated with the drive fasteners 20, and the two drive fasteners 20. It consists of connecting plate-shaped fastener plates 23.
Among these components, the drive fastener 20, clinching stopper 22, and fastener plate 23 are made of iron, and the shock mount 21 is made of rubber.

The drive fastener 20 has a female screw hole 20A in the center thereof into which a screw is screwed, and is clinched to the cover 11 of the tape device main body A1 via a shock mount 21 and a clinching stopper 22. Further, two drive fasteners 20 are arranged one above the other as shown in FIGS. 4 and 5.

The shock mount 21 is a cushioning material and is fitted into a recess 101A formed on the cover 101 facing inward.
Furthermore, a concave groove 21A is formed on the outer periphery of the shock mount 21. The peripheral edge of the hole 101B formed in the recess 101A of the cover 101 is fitted into the concave groove 21A of the shock mount 21, and no adhesive or the like is applied thereto.

The clinching stopper 22 is connected to the drive fastener 20 via the periphery of the hole 101B of the cover 101 and the shock mount 21, and is fixed to the tip of the drive fastener 20 by clinching.

The fastener plate 23 has two drive fastener installation holes 23A for fixing the drive fasteners 20, corresponding to the installation intervals of the drive fasteners 20, and connects these drive fastener installation holes 23A. It is provided.
In such a fastener plate 23, by being fixed to the drive fastener 20 by clinching, it is possible to prevent the drive fastener 20 from spinning idly.

In the magnetic tape device 100 shown in FIGS. 2 to 5 configured as described above, the screws for fixing the housing frame (not shown) are connected to the screw fastening structure 102 (one location) and the screw fastening structure 102 (one location). It is fixed at 103 (3 locations), a total of 4 locations.
Each screw fastening structure 102, 103 may use the drive fastener 20 simultaneously in the upper and lower positions, or may use it only in the upper part or only in the lower part.

At this time, when the drive fasteners 20 are used at the upper and lower positions at the same time, in each screw fastening structure 102, 103, the drive fasteners 20 at the upper position and the drive fasteners 20 at the lower position are connected to each other, as shown in FIG. are connected to each other by the fastener plate 23.

If this fastener plate 23 is not present and only the drive fastener 20 is present, the cover 101 and the shock mount 21 are fitted together without adhesive, and the drive fastener Therefore, in the screw fastening structure 50 shown in the comparative example of FIGS. 6 and 7, the shock mount 21 and the cover 101 are simply fitted together without adhesive. If a torque greater than the frictional force is applied, the drive fastener 20 will idle as the screw rotates, resulting in a problem that it cannot be fixed.

In contrast, in the screw fastening structures 102 and 103 of this embodiment, since the fastener plate 23 is provided, even if the upper drive fastener 20 is tightened with a screw, the lower drive fastener 20 Since it is locked, it can be tightened with a screw without idling, and since the shock mount 21 is interposed, a vibration-proofing effect can be expected.

According to the screw fastening structures 102 and 103 according to the present embodiment as described above, since the fastener plate 23 for fixing the two upper and lower drive fasteners 20 is provided, it is possible to reliably prevent the drive fasteners 20 from idling. It is possible to improve reliability during device assembly.
That is, in the screw fastening structures 102 and 103 of this embodiment, torque is applied to the upper drive fastener 20 by physically connecting the upper and lower drive fasteners 20 with the iron fastener plate 23 without relying on frictional force. However, since it is locked on the lower drive fastener 20 side, it is possible to prevent slippage and obtain a vibration damping effect, thereby solving the problem.

(Second embodiment)
A screw fastening structure 202 shown in the second embodiment of the present invention will be described with reference to FIGS. 8 to 10.

The magnetic tape device 200 shown in FIGS. 8 to 10 includes a tape device main body (not shown) that records/reads data on a magnetic tape, a cover 201 that covers the top of the tape device main body, and The device includes a device base (see FIG. 11, omitted in FIGS. 8 to 10) that covers the bottom of the device main body.
8 is a perspective view of the screw fastening structure 202 attached to the cover 201 of the magnetic tape device, FIG. 9 is an exploded view of the screw fastening structure 202 shown in FIG. 8, and FIG. FIG. 2 is an enlarged view of a fastening structure 202.

The screw fastening structure 202 shown in this embodiment has two first female screw holes 31 formed on the left and right at intervals, and a second female screw hole 32 arranged between these first female screw holes 31. The drive fastener 30 included in the drive fastener main body 30A has a characteristic.
That is, the drive fastener 30 of this embodiment is characterized in that it is formed from an integral member without using a fastener plate.
This drive fastener 30 is installed in a recess 201A formed inwardly in the cover 201.

A screw 34 is installed in the first female screw hole 31 of the drive fastener 30 to be screwed into the hole 201B in the recess 201A of the cover 201 with the shock mount 33 interposed therebetween.
The shock mount 33 is a shock absorbing material, and the opening periphery forming the first female threaded hole 31 of the drive fastener main body 30A is fitted into a concave groove 33A formed on the outer periphery.

Further, a screw (not shown) is installed in the second female screw hole 32 of the drive fastener 30 to be screwed into the hole 201C in the recess 201A of the cover 201 and the housing frame 2 (see FIG. 14).
Further, the drive fastener main body 30A of the drive fastener 30 shown in this example is formed to have an outwardly convex shape by burring tap processing, and the drive fastener tap portion 35 located in the convex portion has a casing. A second female screw hole 32 is formed for a screw to be screwed into the body frame 2 (see FIG. 14).

In the screw fastening structure 202 shown in the second embodiment described above, the axes of the first female screw hole 31 and the second female screw hole 32 to be fixed with the screws are not made to coincide with each other, so that the screws can be tightened when attached to the housing frame. It is possible to prevent a problem in which torque is not applied to the shock mount 33 and the drive fastener 30 spins idly.
In addition, in the screw fastening structure 202, the drive fastener main body 30A is formed into a convex shape by burring tap processing, which is a general processing technique. There is no need for special fasteners such as 202' that require clinching, and the device itself can be made inexpensive.

Specifically, the screw fastening structure 202' shown in FIGS. 11 and 12 is composed of a drive fastener 20, a shock mount 21, and a clinching stopper 22 similar to the first embodiment (see FIGS. 4 and 5). ing.
The magnetic tape device 200' shown in FIGS. 11 and 12 includes a tape device body section A1 that records/reads data on a magnetic tape, a cover 201' that covers the upper part of the tape device body section A1, and a tape device main body section A1 that records/reads data on a magnetic tape. This is shown as an example in which a device base 203 that covers the bottom of the device main body is provided, and a screw fastening structure 202' that screws a housing frame (see FIG. 14) is provided in holes 201A' of these covers 201'.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and may include design changes within the scope of the gist of the present invention.

The present invention can be used not only for magnetic tape devices but also for library devices that use optical and magnetic recording media.

1 Magnetic tape device 1A Cover 2 Housing frame 3 Screw 4 Drive fastener 10 Screw fastening structure 11 Cover 12 Housing frame 13 Drive fastener 13 Female screw hole 14 Fastener plate 15 Clinching stopper 16 Shock mount 18 Drive fastener installation hole 20 Drive fastener 20A Female screw hole 21 Shock mount 21A Concave groove 22 Clinching stopper 23 Fastener plate 23A Drive fastener installation hole 30 Drive fastener 30A Drive fastener body 31 First female screw hole 32 Second female screw hole 33 Shock mount 33A Concave groove 34 Screw 35 Drive fastener Tap section 100 Magnetic tape device 101 Cover 102 Screw fastening structure 103 Screw fastening structure 200 Magnetic tape device 201 Cover 202 Screw fastening structure A Device main body A1 Device main body

Claims (7)

A screw fastening structure for attaching a housing frame to a cover of a device main body,
a drive fastener that is clinched into a hole in a cover of the apparatus main body through a clinching stopper and a shock mount, and has a female screw hole in the center for a screw to be screwed into the housing frame;
a fastener plate having at least two drive fastener installation holes for fixing the drive fastener, and provided to connect these drive fastener installation holes;
A screw fastening structure comprising: The screw fastening structure according to claim 1, wherein the device main body is a magnetic tape device. 3. The screw fastening structure according to claim 1, wherein the housing frame is an exterior material that accommodates the device main body. The screw fastening structure according to claim 1, wherein the fastener plate is fixed to the drive fastener by clinching. The screw fastening structure according to any one of claims 1 to 4, wherein the clinching stopper and the drive fastener are made of iron, and the shock mount is made of a rubber material. A screw fastening structure for attaching a housing frame to a cover of a device main body,
A drive fastener having two first female threaded holes formed at a distance from each other and a second female threaded hole disposed between the first female threaded holes,
A screw is installed in the first female screw hole of the drive fastener to be screwed into the cover of the device main body through a shock mount,
A screw fastening structure, wherein a screw that is screwed into the housing frame is installed in the second female screw hole of the drive fastener. A screw fastening method for attaching a housing frame to a cover of a device main body, the method comprising:
providing a drive fastener that is clinched into the hole of the cover of the device main body through a clinching stopper and a shock mount, and has a female screw hole in the center for a screw to be screwed into the housing frame;
A screw fastening method comprising the steps of: providing a fastener plate having at least two drive fastener installation holes for fixing the drive fastener and connecting these drive fastener installation holes.

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