JP2007033316A - Sealing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device allowing extremely easy sealing work. <P>SOLUTION: A base 1 has a long hole 4 in its surface, and the rim on the rear face side of the long hole 4 defines a hook section 30. A cover 2 has a spring storage recessed part 5 that covers the base 1 and has a through hole 6 matching with the long hole 4 in its bottom. The sealing tool 3 comprises a shaft section 7 of which tip 7a is rotatably inserted into the through hole 6 of the spring storage recessed part 5 and the long hole 4, an orthogonal bar 8 that is projectedly disposed on a side face of the tip 7a of the shaft section 7 and can be hooked on the hook section 30 with turn of the shaft section 7, a cover section 24 serving as a spring receiving section disposed at the rear end of the shaft section 7, and a spring 10 that is stored in the spring storage recessed part 5, is locked with the bottom side of the spring storage recessed part 5 at its one end, is locked with the cover section 24 at the other end, and presses the orthogonal bar 8 to the hook section 30. A sealing cap is put on the head of the shaft section 7. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sealing device applied to an instrument box or the like containing an instrument such as an integrating wattmeter.

  The sealing device prevents unauthorized opening by making the cover unopenable in a state where the base to which the power meter is attached is closed with the cover, for example.

For example, when installing an electric meter such as an integrating wattmeter on the wall of a house, attach a base to the wall, attach an integrating wattmeter there, and cover the base with a sealing screw and sealing cap. Seal. In this case, the cover and the base are fastened by screwing the screwdriver into the groove on the head of the sealing screw. Then, a sealing cap is rotatably mounted on the head of the sealing screw so that the head cannot be rotated unless the sealing cap is broken (see, for example, Patent Document 1).
JP 2005-156857 A

  However, since this sealing device uses a sealing screw, it is troublesome because it is necessary to rotate and tighten the screwdriver many times during the sealing operation. In addition, when the sealing screw is rotated, there is a problem that the driver is likely to come off and the periphery may be damaged by the screwdriver, which requires work.

  Accordingly, an object of the present invention is to provide a sealing device that can perform a sealing operation very easily.

The sealing device according to the present invention includes a first member in which a long hole is formed on the surface, and a peripheral portion on the back surface side of the long hole is used as a hook portion.
A second member having a spring accommodating recess that covers the first member and has an insertion hole formed at the bottom thereof that matches the elongated hole;
The distal end portion has a shaft portion rotatably inserted into the insertion hole and the elongated hole of the spring accommodating recess, and is projected from a side surface of the distal end portion of the shaft portion, and is rotated by the rotation of the shaft portion. It has a projection that can be hooked to the hook portion, has a spring receiving portion provided at the rear end portion of the shaft portion, is housed in the spring housing recess, and one end is locked to the bottom of the spring housing recess And a sealing tool having a spring whose other end is locked to the spring receiving portion and presses the protrusion against the hook portion,
And means for preventing rotation of the sealing tool.

  In the above-described configuration, the hooking portion has an inclined portion where the protrusion rides up against the spring by the rotation of the shaft portion, and falls for preventing reverse rotation that falls from the inclined portion at a predetermined rotation angle of the shaft portion. Part.

  The said structure WHEREIN: It has the protrusion for click which the said protrusion gets over between the said inclination part and the said depression part.

In the above-described configuration, the seat has a seat plate that is disposed on the inner bottom surface of the spring housing recess and is substantially equal in size to the inner bottom surface of the spring housing recess and has a hole that passes through the shaft portion in the center.
The shaft portion is substantially equal to the inner diameter of the hole and has a first fitting portion that fits into the hole in a state where the projection is locked to the depression portion, and a smaller diameter than the first fitting portion. And having a second fitting portion that fits into the hole in a state where the protrusion is located in the elongated hole, and the first fitting portion and the second fitting portion. The interval is continuous on an inclined surface.

  In the above configuration, the spring is a coil spring that is inserted through the shaft portion, and has an outer diameter that is substantially equal to an inner diameter of the spring accommodating recess, and an inner diameter at both ends that is equal to the outer diameter of the first fitting portion of the shaft portion. Almost equal.

In the above configuration, the shaft portion has a groove capable of engaging a driver at the rear end portion,
The second member has an open and closed display portion around the shaft portion on the surface,
The longitudinal direction of the groove is directed to the closed state in a state where the protrusion is engaged with the depressed portion, and the longitudinal direction of the groove is directed to the open state in a state where the protrusion is positioned in the elongated hole.

  In the above configuration, the shaft portion is prevented from coming off against the spring at the edge of the insertion hole on the first member side in a state where the protrusion has passed through the insertion hole of the second member. It has a retaining piece for locking.

  According to the sealing device of the present invention, the shaft portion is pushed against the spring, and the protrusion at the tip portion is slightly inserted in the insertion hole of the spring accommodating recess of the second member and the elongated hole of the first member. When it rotates, the protrusion is caught by the hook portion, and the second member is fixed to the first member. Therefore, sealing is completed when a means such as a sealing cap for preventing the shaft from rotating is applied to the shaft. For this reason, the sealing operation can be performed very easily.

  By providing an inclined part on which the protrusion rides up against the spring and a falling part for preventing reverse rotation that falls from the inclined part as the hook part, the protrusion is attached to the inclined part when the rotation of the shaft part is insufficient. Since it is positioned and returned to the original position by the restoring force of the spring, it can be clearly seen that the second member is not yet fixed, while the reverse rotation is restricted by the protrusion falling into the drop portion. The member can be securely fixed to the first member.

  Providing a click protrusion that the protrusion can get over between the inclined part and the drop part makes it possible for the protrusion to fall into the drop part with a momentum over the click protrusion, and a click feeling is obtained by the click protrusion. The rotation range of the shaft is easy to understand.

  The outer diameter of the first fitting portion of the shaft portion that fits into the hole of the seat plate in a state where the protrusion is locked to the depression portion is substantially equal to the inner diameter of the hole, and the protrusion is positioned in the elongated hole. Since it is larger than the diameter of the second fitting portion that fits into the hole in the state of being, when the shaft portion is pushed against the spring, the shaft portion can be inserted into the elongated hole while being inclined, While being easy to move, the shaft portion does not wobble in a state where the protrusion is locked to the depressed portion, so that the second member can be securely fixed. Moreover, since the space between the first fitting portion and the second fitting portion is continuous on the inclined surface, the operation of inserting the first fitting portion into the hole of the seat plate and the insertion hole of the spring accommodating recess. It can be done smoothly.

  The spring is a coil spring that is inserted into the shaft portion, and the outer diameter is almost equal to the inner diameter of the spring accommodating recess, and the inner diameters at both ends are substantially equal to the outer diameter of the shaft portion, so that the shaft portion is always supported at the center of the spring accommodating recess. This makes it easy to rotate the shaft.

  At the rear end of the shaft portion, there is a groove that can engage the driver, and there is an open and closed display portion around the shaft portion on the surface of the second member, and the projection is locked in the depressed portion. Since the longitudinal direction of the groove is closed and the longitudinal direction of the groove is open in the state where the protrusion is located in the long hole, it can be easily understood whether it is in a fixed state or an unfixed state.

  The shaft portion has a retaining piece that retains and locks to the edge of the second member insertion hole on the first member side in a state where the projection passes through the insertion hole of the second member. And the retaining piece can be held by the second member.

  An embodiment of the present invention will be described with reference to FIGS. That is, FIG. 1 shows a sealing part 1a of a base 1 as a first member for mounting an instrument of an instrument box, a sealing part 2a of a cover 2 as a second member covering the base 1, and a cover 2 sealed to the base 1. The sealing tool 3 is shown, and these constitute a sealing device. The long hole 4 is formed in the sealing part 1a of the base 1, and the hook part 30 is formed at the edge of the long hole 4 on the back side of the sealing part 1a. A spring accommodating recess 5 is formed in the sealing portion 2a of the cover 2 that overlaps the sealing portion 1a of the base 1, and an insertion hole 6 for the sealing tool 3 is formed at the bottom thereof. The sealing tool 3 is passed through a shaft portion 7 inserted into the elongated hole 4 through the insertion hole 6 of the spring accommodating recess 5 of the cover 2 and a lateral hole 9 penetrating in the radial direction at the tip of the shaft portion 7 to be connected to the shaft portion 7. The orthogonal bar 8 for forming a protrusion on the side surface of the distal end portion 7a and the spring 10 accommodated in the spring accommodating recess 5 and biasing the shaft portion 7 in the direction opposite to the insertion direction into the long hole 4 are provided.

  Therefore, the sealing part 2a of the cover 2 is overlapped on the sealing part 1a of the base 1, the spring 10 of the sealing tool 3 is accommodated in the spring accommodating recess 5, the orthogonal bar 8 of the shaft part 7 is inserted into the insertion hole 6, and Inserting the long hole 4 against the spring 10 and rotating the shaft 7 to hook the orthogonal bar 8 on the hook 30 on the back side edge of the long hole 4 fixes the cover 2 to the base 1 and can be sealed. Become.

  FIG. 2 shows the surface side of the sealing portion 1 a of the base 1. The sealing portion 1a is formed on the base 1 so as to protrude in a cylindrical shape, and a long hole 4 is formed at the center of the upper portion. A wide portion through which the shaft portion 7 passes is formed at the center of the long hole 4, thereby the shaft portion 7 is formed. The orthogonal bar 8 can be inserted through the long hole 4. In addition, inclined guides 12 are formed on both sides of the long hole 4 so as to guide the orthogonal bar 8 to the long hole 4. Thereby, when the sealing part 2a is piled up on the sealing part 1a and the sealing tool 3 is inserted from the spring accommodating recess 5 of the cover 2, the orthogonal bar 8 can be smoothly inserted into the long hole 4.

  FIG. 3 shows the back side of the sealing portion 1 a of the base 1. A hooking portion 30 for the orthogonal bar 8 is formed on the back side of the sealing portion 1a. The hook portion 30 includes an inclined portion 13 on which the orthogonal bar 8 rides against the spring 10 by the rotation of the shaft portion 7, and a fall for preventing reverse rotation that falls from the inclined portion 13 at a predetermined rotation angle of the shaft portion 7, for example, 120 degrees. It comprises a portion 14, a flat portion 15 between the inclined portion 13 and the drop portion 14, and a click protrusion 16 formed on the flat portion 15 and over which the orthogonal bar 8 rides. The rotation direction from the long hole 4 through the inclined portion 13 to the drop portion 14 is clockwise when viewed from the upper surface of the cover 2, and the angle is not limited to the above angle, and a driver for rotating the shaft portion 7 is used. A range of a so-called twist angle that can be rotated without changing the position is desirable. A partition 31 is provided at the tip of the drop portion 14, and the orthogonal bar 8 cannot further rotate from the drop portion 14.

  FIG. 4 shows a development view of the hook portion 30. By inserting and rotating the shaft portion 7 against the spring 10 against the long hole 4, the orthogonal bar 8 is moved from the long hole 4 along the inclined portion 13 and the flat portion 15, and after getting over the protrusion 16, It falls into the sagging part 14, and beyond that, the partition 31 prevents rotation. During this time, the orthogonal bar 8 moves along the inclined portion 13, thereby compressing the spring 10 and pressing the cover 2 against the base 1 to increase the force with which the cover 2 meets the base 1. At the same time, a click feeling is obtained when the orthogonal bar 8 gets over the protrusion 16. In the sagging portion 14, the reverse rotation of the orthogonal bar 8 is prevented, whereby the cover 2 is fixed to the base 1 and can be sealed. On the other hand, when the shaft portion 7 is pushed against the spring 10 and the orthogonal bar 8 is rotated in the reverse direction and moved along the flat portion 15 and the inclined portion 13 from the drop portion 14, the shaft portion 7 is removed from the long hole 4. The seal of the cover 2 can be released.

  FIG. 5 shows a side view of the sealing tool 3. A head portion 11 is formed at the rear end of the shaft portion 7, and a first fitting portion 20 and a second fitting portion 21 having a smaller diameter than both portions are provided between the tip portion 7 a and the head portion 11. The second fitting portion 21 is located on the distal end portion 7 a side and has a smaller diameter than the first fitting portion 20. The head 11 has a circumferential groove 18, and a driver groove 19 is formed on the end surface. The first fitting portion 20 is fitted into the insertion hole 6 of the spring accommodating recess 5 in a state where the orthogonal bar 8 of the shaft portion 7 is locked to the depression portion 14, and the second fitting portion 21 is The orthogonal bar 8 is loosely fitted into the insertion hole 6 at the position where it is inserted into the long hole 4. And between the 1st fitting part 20 and the 2nd fitting part 21 continues with the inclined surface 23, and the insertion from the 2nd fitting part 21 to the penetration hole 6 of the 1st fitting part 20 is carried out. It is smooth. In addition, a cover 24 using a washer is inserted into the first fitting portion 20 at a position where it abuts against the head 11. The cover 24 covers the spring accommodating recess 5 and receives the upper end of the spring 10. Also serves as a spring receiver. A seat plate 22 using a washer for receiving the lower end side of the spring 10 is supported on the inner bottom surface of the spring accommodating recess 5 and penetrates through the second fitting portion 21 of the shaft portion 7. The seat plate 22 is substantially equal in size to the inner bottom surface of the spring accommodating recess 5, that is, the inner diameter of the inner bottom surface is substantially equal to the outer diameter of the seat plate 22, and the inner diameter of the hole 22 a is equal to the outer diameter of the first fitting portion 20. Almost equal. Therefore, when the seat plate 22 is loosely fitted to the second fitting portion 21, the shaft portion 7 can wobble with respect to the seat plate 22, but the shaft portion 7 is pushed in and the first fitting portion 20 is pushed. When the is fitted, it is not wobbled because it is supported by the seat plate 22. Accordingly, the shaft portion 7 is easy to operate until the orthogonal bar 8 is hooked on the hook portion 30, but when the orthogonal bar 8 is hooked on the hook portion 30, the shaft portion 7 is also fixed by the seat plate 22, so that the cover 2 Can be securely fixed to the base 1. Further, the second fitting portion 21 is provided with a retaining piece 25 using an E-ring that comes into contact with the distal end portion 7a. The retaining piece 25 is attached to the second fitting portion 21 exposed on the back surface side of the cover 2 in a state where the distal end portion 7a of the shaft portion 7 is inserted into the insertion hole 6 of the spring accommodating recess 5 of the cover 2. The spring 10 is supported by the tip 7 a of the shaft 7 and is locked to the back side of the cover 2, thereby holding the sealing device 3 on the cover 2.

  FIG. 6 shows the spring 10. The spring 10 is a coil spring that is inserted into the shaft portion 7. As described above, the upper end is locked to the cover portion 24, the lower end is locked to the seat plate 22, and the seat plate 22 is attached to the bottom surface 6 of the spring accommodating recess 5. The cover portion 24 pushes up the head portion 11 of the shaft portion 7 in the direction in which the head portion 11 is extracted from the spring accommodating recess 5. The outer diameter of the spring 10 is approximately equal to the inner diameter of the spring accommodating recess 5, but both ends 10 a are formed so that the inner diameter is approximately equal to the outer diameter of the first fitting portion 20 of the shaft portion 7. Therefore, the shaft portion 7 inserted through the spring 10 is positioned substantially at the center axis of the spring 10 by both ends 10a of the spring 10, and the outer periphery of the spring 10 is accommodated in the spring accommodating recess 5, whereby the shaft portion 7 is accommodated in the spring. While being held on the central axis of the recess 5 and holding the sealing tool 3 on the cover 2, both ends 10 a of the spring 10 are fitted to the first fitting portion 20.

  FIG. 7 shows a state in which the cover 2 is put on the base 1 and the sealing tool 3 is not mounted. FIG. 8 shows a state before sealing in which the sealing tool 3 is inserted into the spring accommodating recess 5 of the cover 2. In these drawings, an “open” and “closed” display portion 33 is shown on the surface of the sealing portion 2 a of the cover 2. The longitudinal direction of the groove 19 is directed to the “open” direction with the sealing tool 3 inserted and the orthogonal bar 8 passed through the long hole 4.

  FIG. 9 shows a state in which the sealing tool 3 is pushed and rotated against the spring 10 to lock the orthogonal bar 8 to the depression 14 and the sealing cap 26 is put on the head 11. At this time, the groove 19 faces the “closed” position of the display unit 33. Thus, it can be seen at a glance whether the seal is open or closed depending on the direction of the groove 19. The sealing cap 26 has a crown shape that covers the head 11, and a plurality of locking springs 35 project inward from the edge of the opening, and the tip of each locking spring 35 is rotatable with respect to the head 11. It is locked to the circumferential groove 18. The locking spring 35 can be elastically deformed in one direction when the sealing cap 26 is pushed into the head 11, but has a restricting portion 36 that restricts elastic deformation in the other direction of the locking spring 35. When removing from the portion 11, it cannot be removed from the head 11 unless the sealing cap 26 is broken.

  FIG. 10 shows the appearance of an instrument box to which the sealing device is applied. The upper hooking portion 2b of the cover 2 is hooked on the upper receiving portion 1b of the base 1, and is fixed by a pair of the above-mentioned sealing devices 3 that serve as both a tightening and a sealing so that the cover 2 does not open to the sealing portions 2a on both sides of the lower portion. I am doing so. At this time, the sealing tool 3 can be easily sealed by approximately half rotation. 2c is a meter reading window.

  In addition, in this invention, although the orthogonal bar 8 protrudes in both directions of the radial direction of the axial part 7, you may protrude only in one side. The spring 10 is not limited to a coil spring. Furthermore, the means for preventing the shaft portion 7 from rotating in the sealed state is not limited to the above-described sealing cap 26, and other means can be used. For example, a horizontal hole may be formed in the head 11, and a sealing metal or the like may be passed through the horizontal hole and hung on the cover 2 to prevent the shaft portion 7 from rotating.

It is sectional drawing of the state before sealing with the sealing tool of one embodiment of this invention. It is a perspective view which shows the surface of the sealing part of a base, and a sealing tool. It is a perspective view which shows the back surface side of the sealing part of a base. It is an expanded view of the back surface side of the sealing part of a base. It is sectional drawing of a sealing tool. It is a side view of a spring. (A) is a top view of the state in which the sealing tool of the sealing part of a cover is not mounted | worn, (b) is the sectional view on the AA line, (c) is a bottom view of the sealing part of a base. (A) is a plan view of a state in which the sealing tool of the sealing part of the cover is mounted but the cover is not fixed, (b) is a sectional view taken along the line BB, (c) is a bottom surface of the sealing part of the base FIG. (A) is a plan view of a state in which the sealing tool of the sealing part of the cover is mounted, the cover is fixed and sealed with a sealing cap, (b) is a sectional view taken along the line CC, (c) is a sealing of the base It is a bottom view of a part. (A) is a front view of an instrument box, (b) is the side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Cover 3 Sealing tool 4 Long hole 5 Spring accommodation recessed part 6 Insertion hole 7 Shaft part 8 Orthogonal bar
10 Spring
11 Head 13 Inclined part 14 Depressed part 15 Flat part 16 Projection
20 first fitting portion 21 second fitting portion 23 inclined surface 24 covering portion 26 sealing cap 30 hooking portion

Claims (7)

A first member having a long hole on the surface and having a peripheral edge on the back side of the long hole as a hook,
A second member having a spring accommodating recess that covers the first member and has an insertion hole formed at the bottom thereof that matches the elongated hole;
The distal end portion has a shaft portion rotatably inserted into the insertion hole and the elongated hole of the spring accommodating recess, and is projected from a side surface of the distal end portion of the shaft portion, and is rotated by the rotation of the shaft portion. It has a projection that can be hooked to the hook portion, and has a spring receiving portion provided at the rear end portion of the shaft portion. A sealing tool having a spring whose other end is locked to the spring receiving portion and presses the protrusion against the hook portion;
Means for preventing rotation of the sealing device.   The hook portion has an inclined portion where the protrusion rides up against the spring by rotation of the shaft portion, and has a falling portion for preventing reverse rotation that falls from the inclined portion at a predetermined rotation angle of the shaft portion. Item 1. A sealing device according to item 1.   The sealing device according to claim 2, further comprising: a click protrusion that the protrusion rides over between the inclined portion and the depression portion. A seating plate disposed on the inner bottom surface of the spring housing recess and having a hole having a size approximately equal to the inner bottom surface of the spring housing recess and passing through the shaft portion in the center;
The shaft portion is substantially equal to the inner diameter of the hole and has a first fitting portion that fits into the hole in a state where the projection is locked to the depression portion, and a smaller diameter than the first fitting portion. And having a second fitting portion that fits into the hole in a state where the protrusion is located in the elongated hole, and the first fitting portion and the second fitting portion. The sealing device according to claim 2 or 3, wherein the gap is continuous on an inclined surface.   The spring is a coil spring inserted through the shaft portion, and an outer diameter is substantially equal to an inner diameter of the spring accommodating recess, and inner diameters at both ends are substantially equal to an outer diameter of the first fitting portion of the shaft portion. 4. The sealing device according to 4. The shaft portion has a groove capable of engaging a driver at the rear end portion,
The second member has an open and closed display portion around the shaft portion on the surface,
The longitudinal direction of the groove is directed to the closed state in a state where the projection is locked to the depression, and the longitudinal direction of the groove is directed to the open state in a state where the projection is positioned in the elongated hole. 5. The sealing device according to 5.   The shaft portion is a detachment that retains and locks against the spring against an edge of the insertion hole on the first member side in a state where the protrusion passes through the insertion hole of the second member. The sealing device according to claim 1, further comprising a stop piece.

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