JP4295033B2 - Synthetic resin washer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin washer suitable for use when a compressible and deformable soft material such as a urethane heat insulating material is fixed to a hard material such as wood or steel with a fastener with a head.
[0002]
[Prior art]
When a building wall or the like has a heat insulating structure, as a means for attaching the heat insulating material, the heat insulating material is fixed to the structural material or the base wall with an adhesive. However, this is not only cumbersome to install, but it is also difficult to remove the heat insulating material when dismantling the building, and there are also pieces of wood adhering to the overheated heat insulating material. Is troublesome.
[0003]
On the other hand, when the heat insulating material is fixed with screws, there is no problem as described above. However, since the heat insulating material is soft, fixing with a normal wood screw or drill screw cannot secure a necessary fixing function because the pressing by the head of the screw is weak. Therefore, a synthetic resin washer is used to fix the heat insulating material with screws.
[0004]
As this synthetic resin washer, there is one provided with a substantially cylindrical body part into which the head of the screw fits and a flange part projecting radially outward from the upper end of the body part (for example, Patent Documents 1 and 2). reference). The washer is used in a state of being submerged in the heat insulating material so as not to protrude from the outer surface of the heat insulating material.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 60-159212 [Patent Document 2]
Japanese Patent Laid-Open No. 10-229751
[Problems to be solved by the invention]
By the way, the screw is often made of metal having a high thermal conductivity. On the other hand, in the structure of the washer described in Patent Documents 1 and 2, the head of the screw remains exposed on the outer surface side of the heat insulating material.
[0007]
And if this washer is adopted for the outer insulation method, the head of the screw will be exposed to the outside, so if there is a temperature difference between the inside and outside of the building, heat transfer will be concentrated in and out of the building through the screw, There was a possibility of deteriorating the heat insulation function.
[0008]
Therefore, the present invention has a technical problem to improve such a current situation.
[0009]
[Means for Solving the Problems]
In order to solve this technical problem, the synthetic resin washer according to the invention of claim 1 is a bowl-shaped washer body in which a recess into which the head of a fastener such as a screw or a nail fits completely is formed; A cap body that fits into the recess of the washer body so that the head of the fastener is not exposed to the outside, and the outer peripheral surface of the washer body has a recess with a small diameter at one end where the shaft portion of the fastener fits. The other end located on the opening edge side is formed in a tapered shape having a large diameter, and the cap body is disposed on the other end of the washer body and outside the recess. A bottom plate having a strength that can be pierced by the shaft portion of the fastener is formed in the bottom portion of the washer body through which the shaft portion of the fastener is inserted. Shi On the other hand, on the inner peripheral surface of the recess in the washer body, the cap body is prevented from coming off along the circumferential direction, and the cap body is outside the recess in the washer body. An escape groove that is configured to fit without protruding, and into which the hinge can be fitted when the cap body is fitted into the recess on the outer end surface of the washer body that extends outward from the opening edge of the recess. Is formed .
[0010]
The invention according to claim 2 is the synthetic resin washer according to claim 1, wherein the outer end surface of the washer body that extends outward from the opening edge of the recess is formed so that the opening edge portion of the recess is high and radially outward. It is formed on a tapered surface that becomes lower as it goes .
[0011]
[0012]
[0013]
[0014]
[0015]
[Operation and effect of the invention]
By the way, synthetic resin has lower thermal conductivity than metal. For this reason, when it is configured as in the present invention, for example, when used for fixing a heat insulating material with a fastener such as a screw or a nail in an outer heat insulating method, it prevents or remarkably suppresses heat from being transferred to the inside and outside of the building through the fastener can do.
[0016]
For this reason, without impairing the advantage of using a fastener such as a screw as a fixing means of the heat insulating material, that is, the advantage that the work of attaching and removing the heat insulating material is easy and the processing after the removal is easy. Performance can be secured.
[0017]
By the way, if the washer body is covered with the cap body from the outside, the washer body cannot be completely submerged inside the heat insulating material, and the washer is partially exposed to the outside of the heat insulating material. Problems such as obstructing the placement of members occur. That is, it is preferable that the washer can be completely submerged in the heat insulating material.
[0018]
In this regard, in the present invention, since the cap body is fitted in the recess of the washer body, the cap body can be fitted and removed with the washer body submerged in the heat insulating material. Does not interfere with other members. That is, no new problem is caused by providing the cap body. In other words, the head of the screw can be covered with the cap body without causing a new problem.
[0019]
When the outer peripheral surface of the washer body is formed in a tapered shape as in the present invention, the sinking resistance of the cap body with respect to the heat insulating material can be reduced when the washer body is submerged in the heat insulating material or the like by tightening with screws. There is an advantage that the work of fixing materials can be performed easily.
[0020]
Moreover, when comprised like this invention, since a cap body is stored and conveyed integrally with a washer main body, the loss of a cap body can be eliminated. Furthermore, when configured as in the present invention, for example, the cap body can be prevented from falling off even when the heat insulating material or the like is once fastened and the cap body is fitted into the washer body and then the screw is tightened again. Excellent workability.
[0021]
When configured as in the present invention, the shaft portion of the fastener breaks through the bottom plate, so that the bottom plate is in a cylindrical state and is in close contact with the shaft portion of the fastener in the same manner as the burring process. It is possible to remarkably suppress the passage of air and moisture by significantly improving the sealing performance between them, and as a result, the heat insulating effect can be further improved when used for fastening the heat insulating material. Further, it is possible to suppress rust and rot by suppressing the permeation of moisture.
[0022]
By the way, when a heat insulating material is fastened to a structural material with a fastener as in an external heat insulating method in a building, it is preferable to set the washer so that it does not protrude from the surface of the heat insulating material so as not to interfere with other members. Therefore, when configured as in the present invention , the washer body does not have to be embedded too deeply in the heat insulating material, so that there is an advantage that the fastening operation can be easily performed.
[0023]
In addition, when the cap body is fitted in the recess of the washer body, the base of the hinge protrudes slightly outward, but the outer end surface of the washer body is formed in a tapered shape as in claim 2. Then, there is an advantage that the base of the hinge can be prevented from protruding from the surface of the heat insulating material without excessively embedding the washer body in the heat insulating material. Combining claims 2 and 3 is particularly suitable.
[0024]
The present invention is not limited to fixing a heat insulating material, and can be applied to fixing various heat insulating materials such as fixing a cushion material.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings.
[0026]
(1). 1st Embodiment (FIGS. 1-3)
1 to 3 show a first embodiment. 1 is a plan view before use, FIG. 2 is a sectional view taken along line III-III in FIG. 3, and FIG. 3 is a sectional view in use.
[0027]
The washer 1 of this embodiment is used, for example, in an outer heat insulation method in which a urethane heat insulating material 3 as a soft material is fixed to the outer surface of a wooden wall panel 2 with a trumpet head type wood screw 4. The heat insulating material 3 can be compressed and deformed when a certain amount of force is applied.
[0028]
In the following description, for convenience, the term “upper / lower” is used, which is referred to as “upper” when viewed from the direction in which the wood screw 4 is inserted into the washer 1 and “front” as lower.
[0029]
The washer 1 is made of a synthetic resin such as polypropylene resin, and includes a washer body 5 and a cap body 6. The washer body 5 is formed in a bowl shape with a portion where the seating surface of the head 4a of the wood screw 4 overlaps and a portion spreading outwardly. For this reason, the head 4a of the wood screw 4 is completely fitted into the washer body 5. A full recess 7 is provided.
[0030]
The washer body 5 is formed in a tapered shape (conical cone shape) having a smaller diameter at the lower part (one end) and going toward the upper part (the other end). Moreover, the upper end surface of the washer body 5 is an inclined surface (tapered surface) that becomes lower as it goes radially outward. Therefore, the outer peripheral edge 5a of the washer body 5 is slightly lower than the upper end surface. Further, the cap body 6 is integrally connected to the outer peripheral edge via a flexibly deformable (or bendable) hinge 9. The cap body 6 is bent in the washer body 5 by bending the hinge 9. The inside of the place 7 can be fitted and detached.
[0031]
A plurality (three in the embodiment) of inward projections 10 as an example of a retaining means for the cap body 6 are formed on the inner peripheral surface of the recess 7 in the washer body 5 along the circumferential direction. Further, a relief groove 11 into which the hinge 9 is fitted is formed on the inner peripheral edge of the recess 7 in the washer body 5. A recess 6 a is formed on the surface of the cap body 6 that is located inside when the cap body 6 is fitted into the recess 7.
[0032]
The recess 7 in the washer body 5 has a depth such that the head 4a of the wood screw 4 and the cap body 5 do not protrude outward. In this embodiment, since the specification corresponds to the trumpet head type wood screw 4, the portion of the washer body 5 that the seat surface of the head 4 a of the wood screw 4 hits is a tapered surface 12.
[0033]
Further, a straight portion 13 having a continuous tapered surface 13 is formed at the lower portion of the inner surface of the washer body 5. The reason why the straight portion 13 is formed in this manner is to eliminate the contact of the head 4 a of the wood screw 4 and firmly hold the washer body 5 with the wood screw 4.
[0034]
The bottom portion of the straight portion 13 is closed with a film-like (or thin plate-like) bottom plate 8. As shown in FIG. 3, when the washer 1 is used, the bottom plate 8 is pierced by the shaft portion 4 b of the wood screw 4. The washer 1 is used in a state where the entire washer 1 is submerged in the thick part of the heat insulating material. In other words, the washer 1 is used without protruding from the outer surface of the heat insulating material 3.
[0035]
More precisely, the wood screw 4 is screwed in until the entire washer body 5 sinks into the heat insulating material 3, and then the cap body 5 is fitted into the recess 7 of the washer body 5 and pressed. Then, the cap body 6 gets over the group of inward projections 10 and enters the recess 7 due to deformation against elasticity, and the state is maintained. For example, the cap body 6 can be detached from the washer body 5 by twisting with a driver.
[0036]
If the bottom plate 8 is provided in the washer body 5 as in the present embodiment, the bottom plate 8 is pierced by the shaft portion 4b of the wood screw 4, so that the bottom plate 8 becomes a cylindrical portion 8a similar to the burring process. The shaft 4b of the wood screw 4 is held (closely attached). For this reason, it can block | interrupt air and a water | moisture content in the location of the wood screw 4, and can improve a heat insulation effect more (In addition, the bottom plate 8 so that the front-end | tip of the wood screw 4 is guided to the center of the bottom plate 8). It is also possible to make a small hole in the central part of the base plate or to form only the central part of the bottom plate 8 thinner).
[0037]
By the way, the cap body 6 is fitted into the recess 7 of the washer body 5 by bending the hinge 9. However, since bending of the hinge 9 requires a certain degree of curvature at the base, If the upper surface is flat, the base of the hinge 9 protrudes from the upper surface of the washer body 5. Then, in order to avoid interference between the base of the hinge 9 and another wall member (for example, siding), the wood screw 4 And the washer body 5 must be submerged deeply inside the heat insulating material 3. For this reason, a strong force is required for the fastening operation.
[0038]
On the other hand, when the outer peripheral edge 5a of the washer body 5 is made lower than the top surface as in the present embodiment, the root of the hinge 9 becomes the heat insulating material 3 even if the washer body 5 is not excessively submerged in the heat insulating material 3. Since it can be prevented from being exposed from the surface, there is an advantage that the fastening operation can be easily performed.
[0039]
In addition, when using screws such as wood screws 4, pan head screws can be used, but when the recess 6 a is formed in the cap body 6 as in this embodiment, the screw head is the pan head. There is an advantage that interference with the cap body 5 can be avoided.
[0040]
(2). Modified example (FIG. 4)
In the modification shown in FIG. 4, an annular engagement groove 10 ′ is formed on the inner peripheral surface of the recess 7 as a means for preventing the cap body 6 from coming off. Forming the annular engagement groove 10 'in this way has the advantage of improving the sealing effect. Instead of the annular engagement groove 10 ′, an annular protrusion may be formed.
[0041]
(3). Reference examples (Figs. 5-7)
5 to 7 show reference examples. FIG. 5 is a plan view before use, FIG. 6 is a sectional view taken along line VI-VI in FIG. 5, and FIG. 7 is a sectional view in use. In this reference example, the cap body 6 is integrally connected to the washer body 5 via a bridge-shaped connecting portion 14 that can be shredded. An annular groove 10 ′ is formed in the washer body 5 as means for preventing the cap body 6 from coming off. The other configuration is the same as that of the first embodiment (however, there is no escape groove 11 because there is no hinge).
[0042]
In this reference example, the cap body 6 is torn from the washer body 5 and then fitted into the recess 7 of the washer body 5. Specifically, the washer body 5 may be tightened with the cap body 6 attached, and then the cap body 6 may be torn off, or the cap body 6 may be torn off prior to screwing (the former Is more preferable because the cap body 6 can be prevented from being lost).
[0043]
The present invention is not limited to the illustrated embodiment, and can be embodied in various forms. For example, the washer body and the cap body are not limited to a circular shape in plan view, and may be formed in other forms such as an octagonal shape or a hexagonal shape in plan view.
[0044]
Further, the outer surface of the washer body is not limited to be formed in a tapered shape, but can be formed in a straight shape. Furthermore, there is no limitation on the type of screw used in combination with the washer of the main body, and various types of screws such as drill screws and tapping screws can be used. Moreover, various things, such as the shape of a head, a pan head, a dish head, or a hexagon head, can be used.
[0045]
Furthermore, the application is not limited to fixing a heat insulating material, but can be used for fixing a cushioning material, for example.
[Brief description of the drawings]
FIG. 1 is a single side view of a first embodiment.
2 is a cross-sectional view taken along the line II-II of FIG.
FIG. 3 is a sectional view of the first embodiment in use.
FIG. 4 is a cross-sectional view of a modified example.
FIG. 5 is a single side view of a reference example.
6 is a cross-sectional view taken along line VI-VI in FIG. 4;
FIG. 7 is a sectional view of a reference example in use.
[Explanation of symbols]
1 Washer 2 Wall panel 3 Building insulation 4 Screw (wood screw)
5 Washer body 6 Cap body 7 Recess

Claims (2)

A bowl-shaped washer body in which the head of the fastener such as screws and nails fits perfectly is formed, and a cap body that fits in the recess of the washer body so that the head of the fastener is not exposed to the outside. And
The outer peripheral surface of the washer body is formed in a tapered shape in which one end portion into which the shaft portion of the fastener is fitted has a small diameter and the other end portion located on the opening edge side of the recess has a large diameter. The cap body is integrally connected via a hinge so that the cap body can be fitted into and removed from the recess of the washer body at the other end portion and outside the recess.
The bottom of the washer main body through which the shaft portion of the fastener is inserted forms a bottom plate having a strength that can be pierced by the shaft portion of the fastener, while the inner peripheral surface of the recess in the washer body has a circular shape. Forming a cap body retaining means along the circumferential direction, the cap body is configured to fit into the recess of the washer body without protruding outwards ,
On the outer end surface that spreads outward from the opening edge of the recess in the washer body, an escape groove is formed into which the hinge can be fitted when the cap body is fitted into the recess.
Synthetic resin washer. The outer end surface that spreads outward from the opening edge of the recess in the washer body is formed into a tapered surface that becomes lower as the opening edge portion of the recess is higher and goes radially outward,
The synthetic resin washer according to claim 1.

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