JP2007333027A - Sealing structure and bolt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing structure capable of reducing working man-hours without requiring a large-scale molding facility, and improving a sealing performance and a water cutoff performance, and a bolt used for the sealing structure. <P>SOLUTION: This structure is characterized by being equipped with the bolt 5 having a screw part 5A insertable into a bolt hole 3a formed in a structure 3, and a head part 5B provided on one end of the screw part 5A; a packing 7 (sealing member) capable of sealing a clearance between the bolt hole 3a and the screw part 5A; and a flange 9 (suppressing member) provided on a connection part between the screw part 5A and the head part 5B of the bolt 5, for suppressing expansion of the packing 7 to the outside in the radial direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a sealing structure including at least a bolt having a screw part and a head, and a sealing member (packing) capable of sealing a gap between the bolt hole and the screw part, and a bolt used in the sealing structure.

  Conventionally, when a bolt is attached to a bolt hole (screw hole) formed in a structure such as a water storage tank, roof, or outer wall and tightened with a nut or the like, the gap between the bolt hole and the screw part constituting the bolt is sealed. Various proposals have been made for a structure for applying a water stop (hereinafter, a sealed structure).

  For example, after attaching a bolt to a bolt hole and tightening (screwing) a nut, a waterproof material such as rubber or resin, or a sealing material such as silicon is coated (applied) on the head of the bolt, A covering and sealing structure is known in which a waterproof material or a sealing material seals a gap between a bolt hole and a screw portion to improve sealing performance.

In addition, when a bolt is attached to a bolt hole and a nut is tightened, a seal is deformed by tightening the nut after attaching a washer and a sealing member (hereinafter referred to as packing) between the nut and a building. A tightening sealing structure (see, for example, Patent Document 1) that seals a gap with a nut to improve sealing performance is also known.
JP 2001-238314 A (page 2-3, FIG. 1)

  However, in the above-described conventional covered and sealed structure, when the bolt head is covered with a waterproof material, a large-scale operation such as a device for covering or an operation of injecting the waterproof material into this device (so-called injection) is required. There was a problem that molding equipment would be required.

  In addition, when the bolt head is covered with a sealing material after tightening the bolt in the conventional sheathed sealing structure, the bolt head is covered with the sealing material after tightening the bolt, which increases the number of work steps. There was a problem that. Further, in the conventional sealed structure, if the bolt is tightened after covering the head of the bolt with a sealing material (so-called additional tightening), the coated sealing material will be damaged, and the sealing performance (sealing performance) There is a problem that the water stoppage performance decreases with the decrease in the water resistance. In particular, when coated with a hard resin or the like, the coated waterproofing material or sealing material tends to be damaged.

  On the other hand, in the conventional tightening and sealing structure, since a washer and packing are attached between the nut and the building, there is a problem that water is leaked or leaked from the screw portion depending on the strength with which the nut is tightened. In addition, in the tightening and sealing structure, when the nut is tightened on the bolt, the packing and the screw part are engaged with each other, so that the packing may be damaged, and the sealing performance is deteriorated. There was also a problem that the water performance deteriorated.

  Therefore, the present invention has been made in view of such a problem, and does not require a large molding facility, can reduce the number of work steps, and can improve the sealing performance and the water stopping performance. It is an object of the present invention to provide a sealing structure that can be used and a bolt used in the sealing structure.

  In order to solve the above-described problems, the present invention has the following features. First, the invention according to the first feature of the present invention includes a bolt having a screw part that can be inserted into a bolt hole formed in a building, and a head provided at one end of the screw part, and a bolt It is provided with a sealing member that can seal a gap between the hole and the screw portion, and a suppression member that is provided at a connecting portion between the screw portion and the head of the bolt and suppresses expansion of the sealing member to the outside in the radial direction. And

  According to this characteristic, the bolt having the screw part and the head, the sealing member capable of sealing the gap between the bolt hole and the screw part, and the suppressing member for suppressing the expansion of the sealing member to the radially outer side are provided. Therefore, a large-scale molding facility is not required, the number of work steps can be reduced, and the sealing performance and the water stopping performance can be improved.

  Specifically, in the sealed structure having the above-described configuration, the bolt head is not covered with a waterproof material, so that a large-scale molding facility such as a device for coating or a work for injecting the waterproof material into this device is not required. .

  Further, in the sealing structure having the above-described configuration, even when the bolt is tightened further, when the nut is tightened to the bolt, the sealing member and the screw portion may be engaged by rotating only the nut and tightening the bolt. Absent. Furthermore, in the sealed structure having the above-described configuration, the bolt head is not covered with the sealing material after the bolt is tightened.

  For this reason, a sealing member will not be damaged, a sealing performance and a water stop performance can be improved, and an operation man-hour can be reduced.

  Here, the sealing performance refers to the ability to seal the gap between the bolt hole and the bolt or the gap between the bolt hole and the nut (also referred to as sealing / airtight performance, which is a so-called sealing / airtight performance). Further, the water stop performance refers to the performance of stopping liquid (water, hot water, etc.) and preventing it from flowing (so-called waterproof performance). That is, the water-stopping performance is a property that decreases as the sealing performance decreases, and improves as the sealing performance improves.

  The invention according to the second feature of the present invention is summarized in that the suppressing member is integrally formed with the connecting portion.

  According to this feature, the suppression member is integrally formed with the connecting portion (bolt), so that the number of members can be reduced, the manufacturing cost can be reduced, and the tightening operation can be facilitated. Can do.

  In the invention according to the third feature of the present invention, the suppressing member includes a housing portion that houses the sealing member, and a pressing portion that presses the expansion of the sealing member radially outward to the radially inner side of the sealing member. The gist.

  The gist of the fourth aspect of the present invention is that a slit hole, which is a hole formed in a slit shape, is formed in the pressing portion.

  According to this feature, it is possible to detect that the sealing member is accommodated in the accommodating portion by forming the slit hole, which is a hole formed in a slit shape, in the pressing portion, and the sealing member It can be confirmed whether or not it is attached.

  The invention according to the fifth feature of the present invention is summarized in that the sealing member is formed in an annular shape.

  The invention which concerns on the 6th characteristic of this invention has a screw part which can penetrate the bolt hole formed in a building, and the head provided in one edge part of a screw part, a bolt hole and a screw A bolt that presses a sealing member that can stop a gap between the sealing portion and the building to the building side, and is formed integrally with a connecting portion between the screw portion and the head, and suppresses expansion of the sealing member to the radially outer side. It is a summary to provide.

  ADVANTAGE OF THE INVENTION According to this invention, the sealing structure which does not require a large-scale molding equipment, can reduce work man-hours, can improve a sealing performance and a water stop performance, and the bolt used for this sealing structure Can be provided.

  Hereinafter, an example of a sealing structure according to the present embodiment and a bolt used in the sealing structure will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, the part from which the relationship and ratio of a mutual dimension differ also in between drawings is contained.

[First Embodiment]
FIG. 1 is an exploded perspective view showing the sealing structure according to the first embodiment, and FIG. 2A is a side sectional view showing the state before the sealing structure according to the first embodiment is attached, FIG.2 (b) is side surface sectional drawing which shows the attachment after the sealing structure which concerns on 1st Embodiment.

  As shown in FIG.1 and FIG.2, the sealing structure 1 attaches the volt | bolt 5 to the bolt hole 3a (refer FIG. 2) formed in structures 3, such as a water tank, a roof, and an outer wall, and is nut (not shown). By tightening, the gap between the bolt hole 3a and the bolt 5 (screw portion 5A or head portion 5B) is sealed or water-stopped. The sealing structure 1 is roughly constituted by a bolt 5, a sealing member (hereinafter referred to as packing 7), and a suppressing member (hereinafter referred to as flange 9).

  The bolt 5 presses the packing 7 against the building 3 side. The bolt 5 includes a screw part 5A that can be inserted through a bolt hole 3a formed in the building 3, and a head part 5B provided at one end of the screw part 5A. The screw portion 5A has a thread (groove) extending spirally on the surface. The head 5B is formed in a hexagonal shape, and is chamfered at the top.

  The packing 7 can seal a gap between the bolt hole 3a and the screw portion 5A. The packing 7 is deformed by being pressed against the building 3 side by a flange 9 which will be described later, and seals (packs) the gap between the bolt hole 3a and the screw portion 5A.

  The packing 7 is formed in a ring shape, and the cross-sectional shape in the radial direction is formed in a quadrangle. The packing 7 is made of a deformable and sealable substance (for example, a rubber material, a resin foam, a resin plate).

  The flange 9 is provided at a connecting portion of the bolt 5 between the screw portion 5A and the head portion 5B, and suppresses expansion of the packing 7 outward in the radial direction. The flange 9 is formed integrally with a connecting portion of the bolt 5 between the screw portion 5A and the head portion 5B.

  The flange 9 is configured by an accommodating portion 9 </ b> A that accommodates the packing 7 and a pressing portion 9 </ b> B (wall portion) that presses the expansion of the packing 7 radially outward to the radially inner side of the packing 7. The accommodating portion 9A is formed in a quadrangular cross-sectional shape in the radial direction in order to facilitate accommodating the packing 7 described above. Moreover, the pressing part 9B is continuously formed along the circumferential direction of the pressing part 9B.

  Here, before attaching the sealing structure 1 to the bolt hole 3a formed in the building 3, the depth (D1) of the cross-sectional shape in the housing portion 9A is shallower than the height (H1) of the cross-sectional shape in the packing 7. It is preferable.

  If the depth (D1) of the cross-sectional shape in the accommodating portion 9A is deeper than the height (H1) of the cross-sectional shape in the packing 7, the packing 7 is difficult to seal the gap between the bolt hole 3a and the screw portion 5A. In some cases, the sealing performance and the water stopping performance cannot be improved.

(Action / Effect)
According to the sealing structure 1 according to the first embodiment described above and the bolt 5 used in the sealing structure 1, the bolt 5 having the screw part 5A and the head part 5B, the bolt hole 3a, and the screw part 5A. And a flange 7 (suppressing member) that suppresses expansion of the packing 7 to the outside in the radial direction, without requiring a large molding facility, and The number of work steps can be reduced, and the sealing performance and water stopping performance can be improved.

  Specifically, in the hermetic structure 1 according to the first embodiment, since the head 5B of the bolt 5 is not covered with a waterproof material, a device for covering, an operation of injecting the waterproof material into this device, etc. Large molding equipment is not required.

  Moreover, in the sealing structure 1 according to the first embodiment and the bolt 5 used in the sealing structure 1, only the nut is tightened when the nut is tightened to the bolt 5 even when the bolt 5 is tightened. The packing 7 and the screw portion 5A are not engaged with each other by tightening the bolt 5 by rotating the. Furthermore, in the sealing structure 1 according to the first embodiment and the bolt 5 used in the sealing structure 1, the head 5B of the bolt 5 is not covered with the sealing material after the bolt 5 is tightened.

  For this reason, the packing 7 is not damaged, the sealing performance and the water stopping performance can be improved, and the number of work steps can be reduced.

  Furthermore, in the sealing structure 1 according to the first embodiment and the bolt 5 used in the sealing structure 1, the flange 9 is formed integrally with the connecting portion (the head 5B of the bolt 5 and the flange 9). Can be reduced, the manufacturing cost can be reduced, and the tightening operation can be facilitated.

[Second Embodiment]
Next, the sealing structure according to the second embodiment will be described with reference to FIGS. In the following description, portions that are different from the sealing structure according to the first embodiment described above will be mainly described.

  FIG. 3 is an exploded perspective view showing the sealing structure according to the second embodiment, and FIG. 4A is a side sectional view showing the state before mounting the sealing structure according to the second embodiment. FIG.4 (b) is side surface sectional drawing which shows the attachment of the sealing structure which concerns on 2nd Embodiment.

  As shown in FIG. 3 and FIG. 4, the flange 9 constituting the sealing structure 1 is formed separately from the connection portion between the screw portion 5 </ b> A and the head portion 5 </ b> B in the bolt 5, and is arranged at the connection portion.

  The flange 9 is formed in an annular shape and has a quadrangular cross-sectional shape in the radial direction. 3 and 4, the packing 7 is formed in an annular shape, and the cross-sectional shape in the radial direction is formed in a circular shape.

  Here, before attaching the sealing structure 1 to the bolt hole 3a formed in the building 3, the height (H2) of the cross-sectional shape of the flange 9 should be shallower than the height (H3) of the cross-sectional shape of the packing 7. Is preferable (see FIG. 4A).

  If the height (H2) of the cross-sectional shape of the flange 9 is deeper than the height (H3) of the cross-sectional shape of the packing 7, the packing 7 is difficult to seal the gap between the bolt hole 3a and the screw portion 5A. In some cases, the sealing performance and the water stopping performance cannot be improved.

  Moreover, it is preferable that the internal diameter (B1) of the cross-sectional shape in the flange 9 is smaller than the outer diameter (B2) in the head 5B of the bolt 5 (see FIG. 4A).

  If the inner diameter (B1) of the cross-sectional shape of the flange 9 is larger than the outer diameter (B2) of the head 5B of the bolt 5, the head 5B is difficult to press the packing 7 toward the building 3 side. The water stop performance may not be improved.

(Action / Effect)
In the sealing structure 1 according to the second embodiment described above and the bolt 5 used in the sealing structure 1, the head of the bolt 5 is made of a waterproof material in the same manner as the operation and effect of the first embodiment. Since 5B is not coated, a large molding facility such as a device for coating or a work of injecting a waterproof material into this device is not necessary.

  Further, in the sealing structure 1 according to the second embodiment and the bolt 5 used in the sealing structure 1, the bolt 5 is tightened in the same manner as in the operation and effect of the first embodiment. However, when the nut is fastened to the bolt 5, the packing 7 and the screw portion 5 </ b> A are not meshed by turning only the nut and tightening the bolt 5. Furthermore, in the sealing structure 1 according to the second embodiment and the bolt 5 used in the sealing structure 1, the head 5B of the bolt 5 is not covered with the sealing material after the bolt 5 is tightened.

  For this reason, the packing 7 is not damaged, the sealing performance can be improved, the water stopping performance can be improved, and the number of work steps can be reduced.

[Third Embodiment]
Next, a sealing structure according to the third embodiment will be described with reference to FIG. In the following description, portions different from the sealing structure according to the first embodiment and the second embodiment described above will be mainly described.

  FIG. 5 is an exploded perspective view showing a sealing structure according to the third embodiment. As shown in FIG. 5, the flange 9 constituting the sealing structure 1 is integrally formed at a connection portion between the screw portion 5 </ b> A and the head portion 5 </ b> B in the bolt 5. Further, the flange 9 is formed in an annular shape, and the cross-sectional shape in the radial direction is formed in a quadrangle.

  A plurality of slit holes 9a, which are holes formed in a slit shape, are formed in the pressing portion 9B constituting the flange 9.

(Action / Effect)
According to the sealing structure 1 according to the third embodiment described above and the bolt 5 used in the sealing structure 1, a slit hole 9 a that is a hole formed in a 9B slit shape is formed in the pressing portion. In addition to the operations and effects of the first embodiment or the second embodiment, it is possible to detect that the packing 7 (sealing member) is housed in the housing portion 9A. Since it is possible to check whether or not the packing 7 is attached, forgetting to attach the packing 7 can be prevented.

[Other embodiments]
As described above, the contents of the present invention have been disclosed through the embodiments. However, it should not be understood that the description and drawings constituting a part of this disclosure limit the present invention.

  Specifically, the sealing structure 1 has been described as being attached to a bolt hole 3a formed in a building 3 such as a water tank, a roof, or an outer wall. However, the sealing structure 1 is not limited to this. Of course, it may be used in places that require sealing such as soundproofing (sound insulation).

  Moreover, although the cross-sectional shape in the radial direction of the packing 7 and the cross-sectional shape in the radial direction of the accommodating portion 9 </ b> A have been described as being formed in a quadrangular shape, the present invention is not limited to this.

  For example, as shown in FIG. 6, the cross-sectional shape in the radial direction of the packing 7 may be formed in a circular shape, and the cross-sectional shape in the radial direction of the accommodating portion 9A may be formed in a semicircular shape. As shown in FIG. 7, the cross-sectional shape in the radial direction of the packing 7 is formed in a notch shape in which the inner upper portion and the outer lower portion are inclined, and the cross-sectional shape in the radial direction of the accommodating portion 9A is inclined on the screw portion 5A side. It may be formed in a quadrangular shape. Furthermore, as shown in FIG. 8, the cross-sectional shape in the radial direction of the packing 7 may be formed in a circular shape, and the cross-sectional shape in the radial direction of the accommodating portion 9A may be formed in a quadrangle with the pressing portion 9B side inclined. .

  The head 5B of the bolt 5 has been described as being formed in a hexagonal shape. However, the present invention is not limited to this. For example, as shown in FIG. 9, a hole (for example, a hexagonal hole or a + groove) , -Grooves) may be formed in a circular shape. That is, the bolt 5 may be various bolts and screws such as a small screw, a tabbin screw, and a wood screw.

  In FIG. 9, the cross-sectional shape in the radial direction of the packing 7 is formed in a circular shape, and the cross-sectional shape in the radial direction of the accommodating portion 9 </ b> A is formed in a semicircular shape. And the cross-sectional shape in the radial direction of 9 A of accommodating parts may be formed in the tetragon | quadrangle, and of course may be formed in the various shapes mentioned above.

  From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

It is a disassembled perspective view which shows the sealing structure which concerns on 1st Embodiment. It is side surface sectional drawing which shows the sealing structure which concerns on 1st Embodiment. It is a disassembled perspective view which shows the sealing structure which concerns on 2nd Embodiment. It is side surface sectional drawing which shows the sealing structure which concerns on 2nd Embodiment. It is a disassembled perspective view which shows the sealing structure which concerns on 3rd Embodiment. It is side surface sectional drawing which shows the sealing structure which concerns on other embodiment (the 1). It is side surface sectional drawing which shows the sealing structure which concerns on other embodiment (the 2). It is side surface sectional drawing which shows the sealing structure which concerns on other embodiment (the 3). It is side surface sectional drawing which shows the sealing structure which concerns on other embodiment (the 4).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Sealing structure 3 ... Building 3a ... Bolt hole 5 ... Bolt 5A ... Screw part 5B ... Head part 7 ... Packing 9 ... Flange 9A ... Housing part 9B ... Pushing part 9a ... Slit hole

Claims (6)

A bolt having a screw part that can be inserted through a bolt hole formed in a building, and a head provided at one end of the screw part;
A sealing member capable of sealing a gap between the bolt hole and the screw portion;
A sealing structure comprising: a restraining member that is provided at a connection portion between the screw portion and the head portion of the bolt and suppresses expansion of the sealing member to the radially outer side.   The sealed structure according to claim 1, wherein the suppressing member is integrally formed with the connecting portion. The suppression member is
An accommodating portion for accommodating the sealing member;
The sealing structure according to claim 1, further comprising a pressing portion that presses the expansion of the sealing member radially outward to the radially inner side of the sealing member.   The sealing structure according to claim 3, wherein a slit hole, which is a hole formed in a slit shape, is formed in the pressing portion.   The sealing structure according to any one of claims 1 to 4, wherein the sealing member is formed in an annular shape. A screw part that can be inserted into a bolt hole formed in a building, and a head part that is provided at one end of the screw part, and can seal a gap between the bolt hole and the screw part. A bolt for pressing a member against the building side,
The bolt characterized by comprising the suppression member which is integrally formed in the connection part of the said screw part and the said head, and suppresses expansion to the radial direction outer side of the said sealing member.

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