JP6501478B2 - Tarpaulin fastener - Google Patents

Description

  The present invention relates to a waterproof sheet fixing device for fixing a waterproof sheet provided along a plate-like heat insulating member laid on a waterproof base to the waterproof base.

  Conventionally, as a waterproof sheet fixing tool of this type, a first member inserted from above into a plate-like heat insulating member laid on a waterproof base and fixed to the waterproof base under a first member, and along the upper surface of the heat insulating member While fixing the waterproof sheet arrange | positioned, there existed some which were provided with the 2nd member which can be engaged with respect to the upper end part of a 1st member (for example, refer patent document 1).

The first member is made of a synthetic resin cylindrical member through which a metal screw member for fixing the first member to the waterproof base can be inserted, and at the lower end portion inside the cylinder, the diameter-increasing head of the screw member A screw support portion is provided for rotatably receiving the portion around the screw shaft core. Further, the upper end portion outside the cylinder is formed as a diameter-increasing head.
The second member is formed of a disc-like member in which an insertion hole through which the first member can be inserted is formed at the central portion, and the periphery of the insertion hole is as a countersunk portion in which the enlarged diameter head of the first member can be accommodated It is configured.

Therefore, both can be engaged by overlapping the enlarged diameter head of the first member on the counterbore of the second member. For example, even if an upward force acts on the second member, the first member is waterproofed. As long as it is fixed to the base, the floating force of the second member can be prevented by the engagement force between the two.
Incidentally, the upward force acting on the second member acts, for example, when the waterproof sheet fixed to the second member receives lift by wind or the like.

Unexamined-Japanese-Patent No. 6-136892 (FIG. 1)

As an example of a method of attaching the conventional waterproof sheet fixing tool mentioned above to a waterproof foundation, the penetration hole for inserting a 1st member in heat insulation member beforehand is formed, and the disk shaped 2nd member on it The first member is inserted into the insertion hole of the heat insulating member through the insertion hole of the second member in a state in which the second member is placed, and the screw member is inserted and tightened inside the cylinder of the first member. An example is given.
According to this installation method, the process is divided into two steps: the process of forming the insertion hole in the heat insulating member in advance, and the process of mounting the first member in the insertion hole and fastening it to the waterproof foundation by the screw member. It was easy and time consuming.

  Therefore, in order to reduce the installation time and effort of this method, the screw member is inserted through the first member in advance, and the screw member is screwed from the heat insulating member toward the waterproof foundation as it is. An installation method can be considered in which the member is fixed to the waterproof base while entering the heat insulating member in one step.

However, when this installation method is adopted, a large frictional force is generated between the diameter-increased head and the screw support portion of the first member that rotatably receives the diameter-increased head as the screw member is screwed. The friction heat may cause the first resin member to deform or deteriorate.
Therefore, in this installation method, it becomes difficult to install in a stable state, and as a result, even if it takes time, it is necessary to adopt the installation method divided into the above-mentioned two processes.

Next, the fact that a large frictional force is likely to act between the screw member and the screw support portion will be described according to the above-described installation method in which the first member and the screw member enter the heat insulating member in one step.
That is, by rotating the screw members, the first members try to rotate together by the static friction force acting between the contact surfaces. At the same time, the first member is prevented from rotating by the dynamic friction force acting between the contact surfaces with the heat insulating member.
Then, as the magnitude relationship between the static friction force and the dynamic friction force changes, the first member may move so as to repeat rotation and stop.
Under such circumstances, the maximum static friction force frequently acts between the contact surfaces of the screw member and the screw support.

The following relationship is established between static friction and dynamic friction:
Static friction (F) = coefficient of static friction (μ) × normal force (N)
Dynamic friction (F ') = dynamic friction coefficient (μ') × normal force (N)
In general, the maximum static friction force acts immediately before the contact surfaces are shifted along the surface, and this value is larger than the dynamic friction force. Also, the larger the frictional force, the larger the amount of frictional heat generated.

  Therefore, between the contact surfaces of the screw member and the screw support portion, it is exposed to a large frictional heat due to the maximum static frictional force acting repeatedly, and the synthetic resin portion of the first member is melted and deformed or It will deteriorate.

  Therefore, the object of the present invention is to solve the above-mentioned problems and reduce the installation time while generating the maximum static frictional force between the contact surfaces of the screw support portion of the first member and the screw member. It is an object of the present invention to provide a waterproof sheet fixing device which can be suppressed.

A feature of the present invention is a waterproof sheet fixing device for fixing a waterproof sheet provided along a plate-like heat insulating member laid on a waterproof base to the waterproof base, in a state of being inserted into the heat insulating member A first member fixed to the waterproof base, and an upper end portion of the first member is connected to be relatively rotatable around an axial center orthogonal to the waterproof base, and disposed along the upper surface of the heat insulating member A second member to which the waterproof sheet is fixed, and the first member is a cylindrical member through which a screw member for fixing the first member to the waterproof base can be inserted; At the lower end portion inside the cylinder of one member, a screw supporting portion for rotatably receiving the diameter-increased head of the screw member around the screw shaft center is provided, and the first member is inside the cylinder of the first member Inside the heat insulating member by screwing the inserted screw member Is configured to be allowed to enter, and, wherein Ri rotating together Ah provided with a co-rotation preventing means for preventing the first member and the screw member, the co-rotation preventing means, the outer peripheral portion of said first member a blade portion provided in a state projecting radially outwardly, the wings, in a state where the first member attached to the waterproof underlayer, Ru formed to tear so as to contact with the waterproof base It is in the place.

According to the present invention, the screw member can be inserted into the inside of the cylinder of the first member and screwed, and the screw member and the first member can be advanced together into the heat insulating member and fixed to the waterproof base.
In addition, since the anti-rotation means is provided, when the screw member and the first member are advanced into the heat insulating member, the rotation of the first member and the screw member can be prevented. That is, even if the screw member is screwed, the first member can be advanced into the heat insulating member without rotating.

Therefore, during screwing of the screw member, dynamic friction continues to act between the contact surfaces of the screw support portion of the first member and the enlarged diameter head of the screw member. Therefore, it is possible to suppress that the maximum static frictional force accompanied by a large frictional heat acts between the contact surfaces of the screw support and the screw member.
As a result of the above, although it is possible to adopt an efficient installation method in which the first member and the screw member are made to enter the heat insulating member in one step and installed, the frictional heat generated between the contact surfaces of the screw member and the screw support portion As a result, the first member can be installed in a state where it is not deformed or deteriorated by heat.

Further , according to the present configuration, by providing the wing portion to the first member, the contact area between the first member in the state where the first member has entered into the heat insulating member can be secured larger.
If a larger contact area of the first member with respect to the cross-sectional member can be secured, the reaction force, the frictional force, etc. acting between the contact surfaces of each other increase, and these forces become resistance against the rotation of the first member, The turning with the screw member can be more strongly prevented.

Furthermore, since the wing portion is provided so as to protrude radially outward from the outer peripheral portion of the first member, the resistance moment against rotation can be secured to the maximum by the wing portion, which is more reliable. In addition, it is possible to prevent the turning.
As a result, while the dynamic friction force acts between the first member and the screw member in accordance with the screwing of the screw member, the maximum static friction force hardly acts.

  In the present invention, it is preferable that the lower end portion of the first member is formed in a cannonball shape whose diameter decreases toward the lower end side, and the wing portion is provided on the outer peripheral portion of the cannonball shaped portion.

According to this configuration, since the lower end portion of the first member is formed in a shell shape, it is possible to reduce the tip resistance acting when causing the first member and the screw member to enter the heat insulating member, and to enter more smoothly. Can.
Further, since the wing portion is provided on the outer peripheral portion of the shell-shaped portion, the wing portion can be provided by effectively utilizing the small diameter portion, and the diameter increase of the first member can be prevented from being unnecessarily large. And since the wing portion is located on the lower end side of the first member, the wing portion can enter the heat insulating member from the initial stage of causing the first member to enter the heat insulating member and can exert the common rotation preventing function. .

In the present invention, the wings are preferred when there are formed at a plurality of locations spaced in a circumferential direction of the first member.

According to this configuration, since the wing portions are respectively provided at a plurality of places spaced in the circumferential direction of the first member, a higher anti-rotation preventing power is exerted as compared with those provided at only one place. be able to.
Further, as compared with the case where wings are provided only at one place, even if each of the plurality of wings is formed compactly, it is possible to exert the same feeding prevention force, and therefore, as the entire first member It can be designed not to be bulky. As a result, it is possible to reduce the resistance when to enter the heat insulating member with a screw member, it is possible to install smoothly.

  Further, in the state where the first member is attached to the waterproof foundation, the wing portion is in contact with the waterproof foundation, so that the installation posture of the first member becomes stable. That is, the said waterproof sheet fixing tool itself can be installed in the stable state.

It is a partially cutaway perspective view which shows the installation condition of a waterproofing sheet fixing tool. It is an exploded perspective view of a waterproof sheet fixing tool. It is sectional drawing which shows the installation condition of a waterproof sheet fixing tool. It is sectional drawing which shows the installation condition of a waterproof sheet fixing tool. It is sectional drawing which shows the action condition of a waterproof sheet fixing tool. It is sectional drawing which shows the installation condition of the waterproofing sheet fixing tool of another embodiment. It is sectional drawing which shows the installation condition of the waterproofing sheet fixing tool of another embodiment. It is a perspective view which shows the principal part of the waterproof sheet fixing tool of another embodiment. It is a perspective view which shows the principal part of the waterproof sheet fixing tool of another embodiment.

  Embodiments of the present invention will be described below based on the drawings.

  FIG. 1 shows an example of a heat insulating plate (an example of a heat insulating member) on a roof foundation (an example of a waterproof foundation) 1 using an embodiment of the waterproof sheet fastener of the present invention (hereinafter simply referred to as a sheet fastener) P 14 shows a situation where the waterproof sheet 2 provided along the line 14 is fixed.

  The roof foundation 1 is formed of a metal roof such as a half roof, and a heat insulating plate 14 made of a foamed resin is disposed thereon, and the roof is thermally insulated.

  The waterproof sheet 2 is made of, for example, a vinyl chloride-based synthetic resin sheet.

As shown in FIGS. 2 and 3, the sheet fixing tool P is formed in a disk shape in its outer shape, and is scattered on the roof foundation 1 with a horizontal space, and each of them is a screw. It is fixed to the roof base 1 by a member 3.
Further, the lower surface of the waterproof sheet 2 disposed over the entire roof is adhered to the upper surface of the sheet fixture P.

As shown in FIG. 2, the sheet fixing tool P is provided with a first member P1 which can be fixed to the roof foundation 1 in a state of being inserted into the heat insulating plate 14 and is connected to the upper end portion of the first member P1. And a second member P2 disposed along the upper surface of the heat insulating plate 14 and to which the waterproof sheet 2 is fixed.
In addition, the first member P1 and the second member P2 are relatively rotatably coupled around an axis (corresponding to a screw axis) along a direction (vertical direction in the embodiment) perpendicular to the roof base 1. There is.

The first member P1 is configured such that the main body portion is formed of a cylindrical member (corresponding to a cylindrical member) 18 (see FIG. 2) and can be installed in a state of penetrating the heat insulating plate 14 up and down There is. The first member P1 is configured to be able to be fixed by screwing the screw member 3 inserted into the inside of the cylinder of the cylinder member 18 onto the roof base 1.
The cylindrical member 18 comprises a metal cylindrical portion 18A positioned above the heat insulating plate 14 in the installed state, and a resin cylindrical portion 18B whose upper end is fitted into the metal cylindrical portion 18A and extends downward. is there.

The metal cylindrical portion 18A is made of metal, so high strength and wear resistance can be expected, and deformation, wear and the like of the member in the vicinity of and in contact with the second member P2 can be prevented. Easy to do. The resin cylindrical portion 18B is made of a synthetic resin, so that the heat path between the roof and the roof base 1 can be expected to have the effect of suppressing the heat conduction by making use of the feature of lower thermal conductivity than metal (see FIG. 3). ). As a result, it is possible to prevent the air conditioning efficiency from being reduced on the lower side of the roof base 1.
In addition, the metal cylindrical portion 18A and the resin cylindrical portion 18B are integrally assembled so as not to rotate relative to the axis X.

  The metal cylindrical portion 18A is configured as an upper edge flange portion 17 whose upper end portion can be brought into contact with the counterbore portion 16 of a second member P2 described later. Further, two step portions 19 are provided on the lower end side adjacent to the upper rim portion (see FIG. 3).

  The metal ring member 20 is externally fitted to the step 19a on the upper end side. With this configuration, when the second member P2 rotates around the axis X with respect to the first member P1, the inner peripheral edge portion of the counterbore portion 16 of the second member P2 is a slight outer periphery of the metal ring member 20. By slidingly supporting on the surface, it is possible to prevent eccentricity while allowing smooth rotation in a low friction state.

An annular plate 13 made of synthetic resin is externally fitted to the step 19b on the lower end side.
The provision of the annular plate 13 prevents the first member P1 and the second member P2 from coming off, and even if the surface of the heat insulating plate 14 has a protrusion due to a deposit or the like, the protrusion is annular on the protrusion Since the plate 13 is located in a state where it rides on, it is possible to prevent the projection and the second member P2 from coming into direct contact with each other to prevent rotation.

In the example shown in FIGS. 2 and 3, the outer diameter of the annular plate 13 is set slightly smaller than the outer diameter of the second member P2.
Further, as shown in FIG. 6, the outer diameter of the annular plate 13 may be set to be equal to or larger than the outer diameter of the second member P2. In this case, the entire area of the second member P2 can be protected by the annular plate 13, and the rotation of the second member P2 relative to the first member P1 around the axis X can be smoothly supported.
By finishing the upper surface of the annular plate 13 smoothly, it is possible to reduce the frictional resistance with the overlying second member P2, and to support the rotation of the second member P2 more smoothly. The material of the annular plate 13 may be made of synthetic resin or metal.

The resin cylindrical portion 18B is inserted from the upper end of the cylinder into the interior of the cylinder by inserting a countersunk screw, which is an example of the screw member 3, and tightened. It is configured to be fixed in a state of being sandwiched between the lower surface and the roof base 1.
The screw member 3 is rotatable about the axis X when the lower surface of the enlarged diameter portion 3a of the screw member is in contact with the upper surface of the cylinder bottom 4 in the relationship between the screw member 3 and the resin cylindrical portion 18B. Supported by the bottom 4 of the cylinder.

  Incidentally, the upper surface 4a of the tube bottom 4 is formed in a bowl shape along the plate shape of the lower surface 3b of the enlarged diameter head 3a of the screw member 3, and the friction force acting when the screw member 3 is screwed It has a smooth finish so that it can be reduced (see Figure 3).

  Further, the outer shape of the resin cylindrical portion 18B is formed in a shell-like shape whose diameter decreases toward the lower end side from the upper and lower intermediate portions to the lower end portion of the cylinder. Furthermore, on the outer peripheral portion of the shell-shaped portion 18Ba, a plurality of wing portions (an example of common rotation preventing means T) 18Bb projecting along the longitudinal direction of the cylinder and projecting radially outward are spaced apart in the circumferential direction. It is provided. In the said embodiment, it is provided in three places at equal intervals in the circumferential direction.

  As the screw member 3 is screwed toward the roof foundation 1, as shown in FIGS. 4 and 5, the contact force of the lower surface 3b of the screw member 3 is transmitted to the upper surface 4a of the cylinder bottom 4, The member P1 enters the heat insulating plate 14 while biting from the lower end portion of the resin cylindrical portion 18B. At that time, since the shell shaped part 18Ba is provided, it can be made to enter with little tip resistance. Further, since the wing portion 18Bb is provided, the rotation blocking force of the wing portion 18Bb which bites into the heat insulating plate 14 that the first member P1 tries to rotate around the axis X with the rotation of the screw member 3 Can be prevented. Furthermore, the first member P1 can be advanced into the heat insulating plate 14 in a straight state in the axial center X direction by the guiding action of the wing portion 18Bb.

As described above, since the first member P1 does not rotate even if the screw member 3 is screwed in, the screw member 3 enters the roof foundation 1 while being rotatably supported on the upper surface 4a of the cylinder bottom 4 To go.
Therefore, it is possible to prevent, in advance, the application of a large maximum static friction force by the frictional heat acting only between the lower surface 3b of the enlarged diameter head 3a and the upper surface 4a. Therefore, it is easy to prevent the resin cylindrical portion 18B from being thermally deformed or thermally deteriorated by the generated heat.
In the said embodiment, the common rotation prevention means T is comprised by said wing part 18Bb.

As shown in FIG. 2, the second member P2 is configured as an annular plate provided with a circular hole 15 at the center in a plan view, and the inner peripheral edge facing the circular hole 15 is the upper surface of the first member P1. It is formed one step lower as the counterbore portion 16 which supports the rim portion 17 rotatably.
The outer peripheral portion of the second member P2 is bent toward the roof base 1 side.
The upper surface portion of the second member P2 is configured as a bonding portion 9 for bonding the waterproof sheet 2.
A specific example of the adhesive portion 9 can be constituted by a hot melt adhesive layer made of an adhesive such as polyester, ethylene vinyl acetate, synthetic rubber or olefin. As this hot-melt adhesive layer, one having a melting point of 70 to 160 ° C. is preferable in construction.

  In the case where the adhesive portion 9 is formed of a hot melt adhesive layer, the second member P2 is heated from above by the electromagnetic induction heating device or the like to melt the hot melt adhesive layer while the waterproof sheet 2 is disposed thereon. Thus, the waterproof sheet 2 can be adhered to the second member P2.

Next, installation of the waterproof sheet 2 using the said sheet fixing tool P is demonstrated.
[1] The heat insulating board 14 is laid on the roof base 1.

[2] The sheet fastener P in which the first member P1 and the second member P2 are integrally assembled is arranged upright at a predetermined position on the heat insulating plate 14, and the screw member 3 is used inside the cylinder It fixes to roof foundation 1.
At that time, the screw member 3 is inserted into the cylinder from the upper end of the cylinder of the first member P1 and tightened.
The screw member 3 descends in the heat insulating plate 14, bites into the roof foundation 1, and descends further.
When the screw is advanced, the enlarged diameter head 3a abuts on the cylinder bottom 4 and bites the sheet fixing tool P into the heat insulating plate 14 (see FIG. 4).
When the screw member 3 is screwed until the tube bottom 4 reaches the roof base 1, the installation of the sheet fixing tool P is completed (see FIG. 5).

[3] Similarly, the sheet fixture P is installed at other places.

[4] The waterproof sheet 2 is put on each sheet fixture P, and the second member P2 of the sheet fixture P is heated from the upper side of the waterproof sheet 2 by an electromagnetic induction heating device or the like, so that the hot melt of the bonding portion 9 The adhesive layer is melted and fixed by adhesion (see FIG. 3).

  In the waterproof sheet fixing state as described above, since the second member P2 is rotatable around the axis X with respect to the first member P1 fixed to the roof base 1, for example, a waterproof sheet by wind lift. Even when 2 is lifted and waved, the movement of the waterproof sheet 2 can be supported with ease by the rotation of the second member P2 in the sheet fixture P (see FIG. 3). Moreover, since it is hard to transmit the rotational force which acts on the 2nd member P2 to the 1st member P1 and the screw member 3 which is fixing it, it also can prevent loosening the screw member 3 beforehand.

Moreover, according to the sheet fixing tool P of the embodiment, it is possible to adopt an efficient installation method in which the first member P1 and the screw member 3 are made to enter the heat insulating plate 14 in one step and installed. It is possible to prevent the turning of the first member P1 associated with the rotation, and to install the first member P1 in a state in which the application of the maximum static frictional force between the contact surfaces is avoided.
Therefore, the said sheet fixing tool P can be installed in a stable state efficiently.

[Another embodiment]
<1> The roof foundation 1 is not limited to the roof foundation described in the previous embodiment, and may be, for example, a sloped roof, a wall, etc. Further, their structure is, for example, wooden, steel frame The deck plate is not particularly limited.

<2> The waterproof sheet 2 is not limited to the vinyl chloride-based sheet material made of vinyl chloride or the like described in the previous embodiment, and any other known material may be used.

<3> The adhesion part 9 is not limited to being constituted by the hot melt adhesion layer described in the previous embodiment, and may be constituted by another known adhesive.

<4> The coupling mechanism rotatable around the axis X between the first member P1 and the second member P2 is not limited to the one described in the previous embodiment, and may be, for example, a bearing or the like. It may be.

<5> The first member P1 and the second member P2 are not limited to the first member and the second member described in the previous embodiment, and the shape, dimensions, and the like can be changed as appropriate.
For example, as shown in FIG. 7, the first member P <b> 1 may have a length setting in which the lower end does not reach the waterproof foundation 1 in the installed state. Thus, by providing a space between the first member P1 and the waterproof base 1, for example, even when the outer peripheral side of the installation portion of the waterproof sheet fixing tool P is stepped from above the waterproof sheet 2, the waterproof is It is acceptable that the seat 2 and the tarpaulin fastener P sink together. Therefore, even when the heat insulating member 14 is made of a material that is easily deformed in the thickness direction, it is possible to prevent the waterproof sheet fixing tool P from pushing up the waterproof sheet 2.

<6> The common rotation preventing means T is not limited to the wing 18Bb described in the previous embodiment, and, for example, as shown in FIG. 8, a plurality of protrusions protruding downward from the lower end surface of the cylindrical member 18 21 may be comprised.
Further, as shown in FIG. 9, a plurality of ridges 22 extending in the longitudinal direction of the cylinder may be provided on the outer peripheral surface of the cylindrical member 18 at intervals in the circumferential direction.

  As mentioned above, although the reference numerals are given to make the contrast with the drawings more convenient, the present invention is not limited to the configuration of the attached drawings by the description. Moreover, of course in the range which does not deviate from the summary of this invention, it can implement in a various aspect.

  The said waterproof sheet fixing tool can be utilized not only in the new construction of a waterproof sheet but in repair work.

1 Roof foundation (an example of waterproof foundation)
2 waterproof sheet 3 screw member 3a enlarged diameter head 4 tube bottom (corresponding to screw support)
14 Thermal insulation board (example of thermal insulation member)
18 Cylindrical member (equivalent to cylindrical member)
18Bb wing part (an example of common turning prevention means T)
P1 first member P2 second member T common rotation prevention means X axis core (corresponds to screw axis core)

Claims (3)

A waterproof sheet fixing device for fixing a waterproof sheet provided along a plate-like heat insulating member laid on a waterproof base to the waterproof base,
A first member fixed to the waterproof base in a state of being inserted into the heat insulating member;
A second member which is connected to an upper end portion of the first member so as to be relatively rotatable around an axis perpendicular to the waterproof base, and is arranged along an upper surface of the heat insulating member to fix the waterproof sheet Equipped with
The first member is formed of a cylindrical member through which a screw member for fixing the first member to the waterproof foundation can be inserted.
At a lower end portion inside the cylinder of the first member, there is provided a screw support portion that rotatably receives an enlarged diameter head of the screw member around a screw shaft core,
The first member is configured to be advanced into the heat insulating member by screwing of the screw member inserted into the cylinder of the first member, and rotation of the first member and the screw member Ri Ah provided with a co-rotation preventing means for preventing,
The common rotation prevention means is a wing portion provided so as to protrude radially outward from the outer peripheral portion of the first member,
The wings, in a state where the first member attached to the waterproof base, tarpaulins fixture Ru Thea formed so as to contact with the waterproof base. The lower end portion of the first member, Yes formed in shell-shaped whose diameter as the lower end side, the wings, tarpaulin fixture of claim 1, is provided on the outer periphery of the shell-shaped portion. The wings, tarpaulin fixture according formed to claim 1 or 2 Ru tare at a plurality of positions spaced in the circumferential direction of the first member.

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