JP2009275890A - Spindle cover, and combination of spindle with spindle cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spindle cover of simple structure improved in fitting work efficiency thereof and capable of sure fitting and remarkable cost reduction. <P>SOLUTION: This spindle cover 1 for covering a spindle 102, which is protruded from the center of an operation handle 101 of a valve or various operation apparatus freely to appear/disappear, for protection has a cylindrical cover body 2 provided outside the spindle 102 to cover the spindle 102. The cover body 2 is closed at one end thereof, and provided with a spindle fitting portion 4 at the other end thereof. The spindle fitting portion 4 has a plurality of lock pieces 7 arranged in the circumferential direction to be elastically engaged with a screw groove of the spindle 102. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a spindle cover for covering and protecting a spindle projecting from a central portion of an operation handle of a valve or various operation instruments, and a combination of the spindle and the spindle cover.

  For example, as shown in FIG. 6, in a gate valve (gate valve) 100 used as a roof drain valve of a floating roof tank, when the operation handle 101 is rotated, the spindle 102 located at the center of the operation handle 101 is operated. It is configured to protrude from the center of the handle 101.

  In such a valve, since the valve is installed outdoors, the spindle may be rusted or a gap may be formed in the seal portion due to long-term use, and dust may enter and be damaged. In the worst case, the valve movable part is fixed, and the valve cannot be operated. For this purpose, the entire spindle is covered and protected with a spindle cover.

For example, Patent Document 1 includes a transparent cylindrical cover body that is sized to cover a spindle, and a connection portion attached to a base end portion of the cover body has an operation handle fixed to a valve. A spindle cover is disclosed in which a sleeve nut is fixed by screwing, while a cover is press-fitted into the upper opening of the cover body.
JP 7-243554 A

  However, the conventional spindle cover has a complicated structure. Therefore, it takes time to attach the spindle cover to the valve, and there is a problem in terms of workability. Further, since the structure is complicated, there is a problem in terms of manufacturing cost.

  Such a problem exists not only in the gate valve but also in other valves in which the spindle can be protruded and retracted from the center of the operation handle and various operation instruments.

  Therefore, an object of the present invention is to solve the problems of the conventional spindle cover as described above, improve the workability of attaching the spindle cover, and provide a simple and reliable attachment. An object is to provide a spindle cover and a combination of a spindle and a spindle cover that can be realized and can be greatly reduced in terms of cost.

The above object is achieved by a spindle cover according to the present invention. In summary, according to one aspect, the present invention provides a spindle cover that covers and protects a spindle that protrudes and retracts from the center of an operation handle of a valve or various operation instruments.
A cylindrical cover body installed outside the spindle and covering the spindle;
The cover body has one end closed, and at least the other end or the other end close to the spindle mounting portion.
The spindle mounting part is provided with a spindle cover characterized by having a plurality of locking pieces arranged in a circumferential direction and elastically engaging with a thread groove of the spindle.

Further, according to another aspect of the present invention, there is a combination of a spindle that protrudes and protrudes from the center of an operation handle of a valve or various operation instruments, and a spindle cover that covers and protects the spindle.
The spindle is formed with a thread groove along the axial direction,
The spindle cover has a cylindrical cover body that is installed outside the spindle and covers the spindle,
The cover body has one end closed, and at least the other end or the other end close to the spindle mounting portion.
The spindle mounting portion includes a plurality of locking pieces that are arranged in a circumferential direction and elastically engage with a thread groove of the spindle, and a combination of a spindle and a spindle cover is provided.

  According to each of the embodiments of the present invention, the spindle mounting portion is formed of a thin plate having elasticity and having an opening at the center, and has a predetermined length outward from the opening in the radial direction. A slit is formed, thereby forming the plurality of locking pieces evenly divided in the circumferential direction.

  According to another embodiment of the present invention, the cover main body having one end closed and the spindle mounting portion is made of a transparent synthetic resin having a thin plate-like elasticity.

  The spindle cover of the present invention can be easily attached only by being pushed in and can be prevented from coming off after the attachment, which is highly convenient. Moreover, after the attachment, the fixed state can be continuously maintained by the elastic force of the locking piece.

  As described above, according to the present invention, it is possible to improve the workability of attaching the spindle cover, to realize a simple and reliable attachment, and to achieve a significant reduction in cost.

  Hereinafter, the spindle cover according to the present invention and the combination of the spindle and the spindle cover will be described in more detail with reference to the drawings.

Example 1
FIG. 1 shows a state in which a spindle cover 1 according to the present invention is installed outside a spindle 102 which is located at the center of an operation handle 101 and can be moved in and out in a gate valve 100 as shown in FIG. 2 (a) and 2 (b) show an embodiment of the spindle cover of the present invention.

  Referring to FIGS. 1, 2 (a), and 2 (b), according to the present embodiment, the spindle cover 1 has a cylindrical cover body 2. One end of the cover body 2, that is, the upper end in FIG. 2A is a closed end (lid portion) 3, and the other end, that is, the lower end in FIG. The mounting portion 4 is used. The cover body 2 is desirably transparent at least partially or entirely so that when the cover body 2 is attached to the spindle 102, the internal spindle 102 can be visually recognized.

  Further, the spindle mounting portion 4 is assumed to be the lower end of the cover body 2, but as shown by a one-dot chain line in FIG. 2 (a), the position close to the other end, that is, inward from the lower end. That is, it may be provided at a position slightly moved upward in FIG.

  In the case of the spindle cover 1 used for a valve having a long spindle 102, the cover body 2 itself is also long. In this case, as shown by a two-dot chain line in FIG. 2A, the spindle mounting portion 4 can also be provided near the middle portion of the cover body 2. Thus, by providing the spindle mounting portion 4 at the lower end portion of the cover body 2 and also at the intermediate portion, the spindle cover 1 is stabilized when the spindle cover 1 is mounted on the spindle 102.

  As shown in FIG. 2B, the spindle mounting portion 4 is formed of a thin plate having a thickness (t) having elasticity, and an opening 5 is formed at the center. Further, a slit 6 having a predetermined length (h) and a width (w) is formed outwardly from the opening 5 in the radial direction, whereby two or more slits that are equally divided in the circumferential direction are arranged. That is, a plurality of locking pieces 7 are formed.

  In this embodiment, the entire spindle cover including the cover body 2, the lid portion 3, and the spindle mounting portion 4 is integrally made of a vinyl chloride resin which is a thin plate-like transparent synthetic resin having a thickness (t). However, the present invention is not limited to this, and the cover main body 2, the lid portion 3, and the spindle mounting portion 4 may be made of different materials and different thicknesses. The material used may be a transparent synthetic resin such as a polycarbonate resin, an acrylic resin, a polyethylene resin, or a polyethylene terephthalate resin, and may be an opaque vinyl chloride resin in some cases. Moreover, it is also possible to produce a part or all of a thin metal plate as required.

  Here, it will be as follows if an example of the specific dimension of the spindle cover 1 in a present Example is shown. However, the spindle cover 1 of the present invention is not limited to this.

  In the present embodiment, the shape and size of the screw formed in the axial direction of the spindle 102 was a single thread with a screw groove diameter of 20 mm and a screw thread diameter of 25 mm.

・ Cover body, lid Material: Vinyl chloride resin Thickness (t): 1mm
Outer diameter (D): 60mm
Length (L): 150mm
・ Spindle mounting part Material: Vinyl chloride resin Thickness (t): 1mm
Diameter of opening (inner diameter of slit) (d): 16 mm
Slit width (w): 1 mm
Incision length of slit (h): 17 mm
Number of locking pieces: 8

  Next, the operation and operation for attaching the spindle cover 1 of this embodiment having the above-described configuration to the spindle 102 will be described.

  The spindle cover 1 according to the present embodiment is configured such that the spindle mounting portion 4 faces the upper end 102a of the spindle 102 and presses the opening 5 in conformity with the spindle upper end 102a, as indicated by a one-dot chain line in FIG. .

  As a result, the locking piece 7 of the spindle mounting portion 4 is deformed upward (inward of the cover main body) by the thread 102 b of the spindle 102, and the inner peripheral tip 7 a of the locking piece 7 is threaded into the screw groove 102 c of the spindle 102. It rushes into and engages elastically with a predetermined elastic force.

  That is, when the spindle cover 1 of this embodiment is pushed in from above the spindle 102, the distal end portion 7 a of the locking piece 7 that defines the opening 5 of the mounting portion 4 is pushed open, and the distal end of the locking piece 7 is opened. The part 7a enters the spindle screw groove 102c in a direction opposite to the direction of the spindle screw groove 102c, that is, in a state opposite to the cover insertion direction. Therefore, the spindle cover 1 does not easily fall off from the spindle 102.

  As described above, according to the spindle cover 1 of the present embodiment, the spindle screw groove 102c enters the spindle screw groove 102c at an acute angle in a state where the tip 7a of the locking piece 7 is pushed open. Can be prevented.

  Next, as shown in FIG. 3, the spindle cover 1 is pushed in until the cover body 2 is positioned outside the spindle 102 and the lower end (bottom part) 1 a of the cover body 2 contacts the sleeve nut 103 of the operation handle 101. Is done.

  Here, when the spindle cover 1 is further rotated in a predetermined direction, that is, in a direction opposite to the screw direction of the spindle, the distal end portion 7a of the locking piece 7 moves toward the sleeve nut 103 along the spindle screw groove 102c. Thus, the spindle cover 1 can be securely contacted and fixed to the upper surface 103a of the sleeve nut 103 with a predetermined force. Accordingly, there is no gap between the lower end portion 1a of the spindle cover 1 and the sleeve nut upper surface 103a, and entry of water or the like from this portion can be prevented.

  In this state, as shown by the solid line in FIG. 3, the distal end portion 7a of the locking piece 7 enters the spindle screw groove 102c, thereby exhibiting an effect of preventing the removal. Further, the fixed state can be continuously maintained by the elastic force of the locking piece 7.

  Therefore, the spindle cover 1 can completely cover and protect the spindle 102 portion protruding above the operation handle 101, more specifically, above the sleeve nut upper surface 103a.

  Here, as shown in FIG. 4, when the spindle 102 moves downward by rotating the operation handle 101, the spindle cover 1 itself moves downward because its bottom 1 a abuts against the sleeve nut 103. Movement is blocked. Therefore, the locking piece tip 7a is elastically deformed by the downward movement of the thread 102b of the spindle 102, and the spindle 102 can be moved downward. Even if the spindle 102 moves downward, the upper end 102 a of the spindle 102 does not completely move from the upper surface 103 a of the sleeve nut 103 into the operation handle 101, that is, into the sleeve nut 103. Therefore, the spindle cover 1 is maintained in a state in which the locking piece 7 is engaged with the thread groove 102 c of the spindle 102 and is not detached from the spindle 102 and is covered with the spindle 102. Further, in this state, the spindle cover 1 is brought into a state where the distal end portion 7a of the locking piece 7 is engaged with the spindle screw groove 102c and is urged toward the sleeve nut 103 by the spindle screw thread 102b. Therefore, the spindle cover 1 is securely fixed to the upper surface 103a of the sleeve nut 103 with a predetermined force.

  On the other hand, as shown in FIG. 5, when the spindle 102 moves upward by rotating the operation handle 101, the locking piece tip 7a is engaged with the thread 102b of the spindle 102. , Moved upward. Therefore, the operator presses the spindle cover 1 downward or rotates when the operation of the operation handle 101 is completed. 3, the spindle 102 is covered, the bottom 1a of the spindle cover 1 is contacted and fixed to the upper surface 103a of the sleeve nut 103, and the fixed state is continued by the elastic force of the locking piece 7. Can be maintained.

  Here, as described above, when the spindle cover 1 is further rotated, the tip 7a of the locking piece 7 moves to the sleeve nut 103 side along the spindle screw groove 103b, so that the spindle cover 1 is moved to the upper surface of the sleeve nut 103. 103a can be securely contacted and fixed with a predetermined force.

It is a perspective view of a spindle cover which shows the state where the spindle cover concerning the present invention was installed in the spindle. 1 shows an embodiment of a spindle cover according to the present invention, FIG. 2 (a) is a longitudinal sectional view, and FIG. 2 (b) is a sectional view taken along line AA in FIG. 2 (a). It is. It is a longitudinal cross-sectional view of a spindle cover and a spindle showing a state in which the spindle cover according to the present invention is installed on the spindle. It is sectional drawing which shows a state when a spindle is moved below in the state which installed the spindle cover which concerns on this invention in a spindle. It is sectional drawing which shows a state when a spindle is moved upwards in the state which installed the spindle cover which concerns on this invention in a spindle. . It is a perspective view which shows a gate valve.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spindle cover 2 Cover main body 3 Cover part 4 Spindle mounting part 5 Opening part 6 Slit 7 Locking piece 100 Gate valve 101 Operation handle 102 Spindle 102a Spindle upper end 102b Spindle thread 102c Spindle thread groove 103 Sleeve nut

Claims (6)

In the spindle cover that covers and protects the spindle that protrudes from the center of the operation handle of the valve and various operation instruments,
A cylindrical cover body installed outside the spindle and covering the spindle;
The cover body has one end closed, and at least the other end or the other end close to the spindle mounting portion.
The spindle cover has a plurality of locking pieces arranged in a circumferential direction and elastically engaging with a thread groove of the spindle.   The spindle mounting portion is formed of an elastic thin plate having an opening at the center, and a slit having a predetermined length is formed radially outward from the opening, thereby equalizing in the circumferential direction. The spindle cover according to claim 1, wherein the plurality of locking pieces divided into two are formed.   3. The spindle cover according to claim 1, wherein one end portion is closed and the cover main body having the spindle mounting portion is integrally formed of a thin plate-like elastic synthetic resin having elasticity. . A combination of a spindle that protrudes and protrudes from the center of an operation handle of a valve or various operation instruments, and a spindle cover that covers and protects the spindle,
The spindle is formed with a thread groove along the axial direction,
The spindle cover has a cylindrical cover body that is installed outside the spindle and covers the spindle,
The cover body has one end closed, and at least the other end or the other end close to the spindle mounting portion.
The spindle mounting portion is a combination of a spindle and a spindle cover, wherein the spindle mounting portion includes a plurality of locking pieces arranged in a circumferential direction and elastically engaging with a thread groove of the spindle.   The spindle mounting portion is formed of an elastic thin plate having an opening at the center, and a slit having a predetermined length is formed radially outward from the opening, thereby equalizing in the circumferential direction. The combination of a spindle and a spindle cover according to claim 4, wherein the plurality of locking pieces divided into two are formed.   6. The spindle according to claim 4, wherein one end is closed and the cover main body having the spindle mounting portion is integrally formed of a thin plate-like elastic synthetic resin having elasticity. Combination with spindle cover.

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