JP2017003036A - Screw device and metal washer for screw device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and clearly remove a curing film even in a case of attaching a screw device from above the curing film in advance.SOLUTION: A screw part 3 is provided at a screw shaft part 1, and a screw body 6 having a screw head part 4 larger than the outer diameter of the screw part 3 is provided at the base end of the screw shaft part 1. The outer peripheral part of the screw head part 4 is formed so that its diameter is equal to or smaller than that of the outermost peripheral part of a fastened object opposite surface part 7 in the screw head part 4. A biting blade 8 capable of biting into the surface of a fastened object 5 with fastening of the screw part 3 is provided over the whole circumference on the outermost peripheral part of the fastened object opposite surface part 7.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a screw device in which a screw portion is provided on a screw shaft portion, and a screw body having a screw head larger than the outer shape of the screw portion is provided at a base end of the screw shaft portion, and a washer for the screw device. .

  Conventionally, the screw device generally has a flat surface of a surface to be fastened (see, for example, Patent Document 1).

JP-A-5-263815

In the conventional screw device described above, for example, when attached to a metal object to be tightened in advance and shipped, with a resin curing film that protects the surface of the object to be tightened so as not to be damaged, The screw device may be attached over the curing film.
When the screw device is attached to the surface of the object to be tightened from above the curing film, the screw part bites into the curing film and the object to be tightened as the screw shaft rotates, and is fixed with the curing film sandwiched between them. Is done.
However, after the object to be tightened is assembled at the installation site, the curing film must be removed. At that time, the curing film pressed against the surface of the object to be tightened by the screw device cannot be removed cleanly. May remain in a state where the small piece is caught between the screw devices.

  Accordingly, an object of the present invention is to eliminate the above-mentioned problems and to allow the curing film to be easily and cleanly removed even if a screw device is previously attached on the curing film.

  A first characteristic configuration of the screw device of the present invention is that a screw portion is provided on a screw shaft portion, and a screw main body having a screw head larger than an outer diameter of the screw portion is provided at a base end of the screw shaft portion. In the screw device, the outer periphery of the screw head is formed to have the same diameter as or smaller than the outermost periphery of the surface to be fastened in the screw head, and the screw portion is tightened. A biting blade capable of biting into the surface of the object to be tightened is provided over the entire circumference at the outermost peripheral part of the surface of the object to be tightened.

According to the first characteristic configuration of the present invention, when the screw device of the present invention is attached and operated from above the curing film in a state where the curing film is previously attached to the surface of the object to be fastened, the screw shaft portion is rotated. With the tightening of the screw part, the biting blade provided over the entire circumference at the outermost peripheral part of the surface to be fastened bites into the curing film. A circular shearing part having the same diameter as the outermost peripheral part of the opposing surface part is formed.
Therefore, when the curing film is removed after the object to be tightened is assembled at the installation site, the circular shearing portion formed on the curing film has an outer periphery having the same diameter as or smaller than the outermost peripheral portion of the surface to be tightened. The screw head that forms the part passes through and is easily peeled off from the surface of the object to be tightened.
Therefore, unlike the prior art, a small piece of film does not remain in a state of protruding between the screw devices, and the curing film can be removed easily and cleanly.

  A second characteristic configuration of the present invention is a screw device in which a screw portion is provided on a screw shaft portion, and a screw body having a screw head larger than an outer diameter of the screw portion is provided at a base end of the screw shaft portion. A washer that is externally fitted to the screw shaft portion of the screw body is provided, and the first abutting surface portion of the washer with respect to the object to be tightened bites into the surface of the object to be tightened as the screw portion is tightened. A possible bite blade is provided at the outermost peripheral portion of the first contact surface portion over the entire circumference.

According to the second characteristic configuration of the present invention, the screw device is provided with a screw body and a washer, and on the first contact surface portion of the washer with respect to the object to be tightened, on the surface of the object to be tightened as the screw part is tightened. A biting blade provided on the first abutting surface portion of the washer with respect to an object to be fastened with tightening of the screw portion by providing a biting blade capable of biting all around the outermost peripheral portion of the first abutting surface portion. The blade bites into the curing film, and a circular shearing part having the same diameter as the outermost peripheral part of the first contact surface part is formed in the curing film.
Therefore, after removing the curing film after assembling the object to be tightened at the installation site, the circular shearing part formed on the curing film penetrates the outer peripheral part of the washer and the screw head, so that the object to be tightened can be easily obtained. Peel off from the surface.
Therefore, unlike the prior art, a small piece of film does not remain in a state of protruding between the screw devices, and the curing film can be removed easily and cleanly.
In addition, it is only necessary to provide a biting blade on the washer, and a general commercially available screw body can be used, and a screw device can be provided at a low cost.

  A third characteristic configuration of the present invention is that a second contact surface portion of the washer with respect to the screw head is formed on a high friction surface.

  According to the third characteristic configuration of the present invention, as the screw shaft portion is rotated, the second contact surface portion of the washer formed on the high friction surface and the screw head come into contact with each other and rotate together. This makes it easier to bite into the curing film while rotating the biting blade.

  According to a fourth aspect of the present invention, there is provided an engagement surface portion capable of engaging with each other an object-facing surface portion of the screw head and a second contact surface portion of the washer facing the object-facing surface portion of the screw. It is in the place where it was formed.

  According to the fourth characteristic configuration of the present invention, the engagement surface portion formed on the tightening object facing surface portion of the screw head and the second contact surface portion engages with each other to rotate the screw shaft portion. Along with this, the second abutment surface portion of the washer and the screw head are more likely to rotate together, and the biting blade can be rotated while the biting blade is rotated.

  According to a fifth characteristic configuration of the present invention, the screw head is provided with an engaging groove for engaging a rotary tool.

  According to the fifth characteristic configuration of the present invention, the rotation tool can be easily rotated by engaging the rotary tool with the engagement groove provided in the screw head.

  According to a sixth characteristic configuration of the present invention, an outer peripheral portion of the screw head is formed in a polygonal column-shaped rotation operation portion.

  According to the sixth characteristic configuration of the present invention, a rotary tool such as a spanner can be engaged with the polygonal column-shaped rotation operation portion formed on the screw head, and the rotation operation of the screw shaft portion can be easily performed. You can do it.

  According to a seventh characteristic configuration of the present invention, the cross-sectional shape of the biting blade along the screw axis is formed on an inclined surface that is farther from the screw axis as the inner peripheral surface of the biting blade goes to the tip side. The outer peripheral surface of the biting blade is formed in an inclined surface that is parallel to the screw shaft center or that is farther from the screw shaft center toward the tip end side.

  According to the seventh characteristic configuration of the present invention, the cross-sectional shape of the biting blade along the screw axis is formed on an inclined surface that is farther from the screw axis as the inner peripheral surface of the biting blade goes to the tip side. The outer peripheral surface of the biting blade is formed in an inclined surface that is parallel to the screw shaft center or is further away from the screw shaft center toward the tip side. If provided, the maximum circular shearing part where the screw head easily penetrates is formed by the biting blade, and if the biting blade is formed on the washer, The circular shearing part is formed by a biting blade, and the curing film can be easily and neatly removed. In particular, by setting the outer peripheral surface of the biting blade parallel to the screw axis, the biting blade can be pressed almost vertically against the curing film surface, and the cutting force of the curing film by tightening the screw can be maximized. Can do.

  An eighth characteristic configuration of the present invention is that the biting blade is formed in an uneven saw blade shape in the outer peripheral direction of the contact surface portion.

  According to the eighth characteristic configuration of the present invention, the biting blade is formed in an uneven saw blade shape in the outer circumferential direction of the contact surface portion, so that the biting blade rotates while the screw portion is tightened. It becomes easy to bite into the curing film, and a circular shearing part having the same diameter as the outermost peripheral part of the surface to be fastened is more reliably formed.

  According to the ninth feature of the washer for the screw device of the present invention, the screw shaft has a cutting blade at the tip of the screw shaft portion, and a screw portion having a larger outer diameter than the cutting blade on the proximal end side of the screw shaft portion; A washer for a screw device according to the above-mentioned feature for externally fitting to a screw body having a screw head larger than the outer diameter of the screw portion at a base end, wherein the washer is for a first contact surface portion with respect to an object to be tightened A biting blade that can bite into the surface of the object to be fastened as the screw portion is tightened is provided at the outermost peripheral portion of the first contact surface portion over the entire circumference.

According to the ninth feature of the present invention, the first abutting surface portion is provided with a biting blade that can bite into the surface of the object to be tightened as the screw portion is tightened on the first abutting surface portion of the washer with respect to the object to be tightened. When the screw part is provided over the entire circumference, the biting blade provided on the first contact surface part of the washer with respect to the object to be tightened bites into the curing film, and the first contact surface is provided. A circular shearing part having the same diameter as the outermost peripheral part of the part is formed on the curing film.
Therefore, after removing the curing film after assembling the object to be tightened at the installation site, the circular shearing part formed on the curing film penetrates the outer peripheral part of the washer and the screw head, so that the object to be tightened can be easily obtained. Peel off from the surface.
Therefore, unlike the prior art, a small piece of film does not remain in a state of protruding between the screw devices, and the curing film can be removed easily and cleanly.
In addition, it is only necessary to provide a biting blade on the washer, and a general commercially available screw body can be used, and a screw device can be provided at a low cost.

It is a use condition perspective view showing the state where the screw device of the present invention was attached. It is sectional drawing of the attachment state of a screw apparatus. It is a perspective view when peeling a curing film. It is a principal part side view of another embodiment. (A)-(d) is a principal part side view of another embodiment, respectively. It is a vertical side view of another embodiment. It is a partially vertical side view of another embodiment. (A), (b) is a perspective view of a different washer. It is a side view of the washer of another embodiment. It is a partially vertical side view of another embodiment. It is a partially vertical side view of another embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
[First embodiment]
As shown in FIGS. 1 to 2, a drill screw device as an example of a screw device has a cutting blade 2 that drills at the tip of a screw shaft portion 1 without drilling in advance, and the screw shaft portion. A screw body 6 having a screw portion 3 having a larger outer diameter than the cutting blade 2 on the base end side of 1 and a screw head 4 for driving and rotating operation larger than the outer diameter of the screw portion 3 on the base end, An outer peripheral portion of the screw head 4 is formed to have the same diameter as or smaller than the outermost peripheral portion of the object-to-be-fastened surface portion 7 in the screw head 4, and the surface of the object 5 to be tightened as the screw portion 3 is tightened. A biting blade 8 capable of biting is provided on the outermost peripheral part of the object-facing surface part 7 to be tightened over the entire circumference.

  As shown in FIG. 2, the biting blade 8 is formed such that the cross-sectional shape of the biting blade along the screw shaft center is an inclined surface that moves away from the screw shaft center as the inner peripheral surface of the biting blade 8 goes to the tip side. In addition, the outer peripheral surface of the biting blade 8 is formed in an inclined surface that is parallel to the screw shaft center or is further away from the screw shaft center toward the tip end side.

  As shown in FIG. 1 and FIG. 2, the screw device is used for, for example, a construction site or the like in a state where a metal fastening object 5 such as an aluminum extruded product is preliminarily assembled with each other. Therefore, when shipping, the resin curing film 9 that protects the surface of the object to be tightened 5 from being damaged is attached on the curing film 9 and the object to be tightened 5 is installed on the site. After assembling and construction, the curing film 9 is removed.

As shown in FIG. 2, when the screw device is attached to the surface of the object 5 to be tightened from above the curing film 9, the cutting blade 2 provided at the tip of the screw shaft portion 1 is attached to the screw shaft portion 1. The screw portion 3 provided on the screw shaft portion 1 bites into the curing film 9 and the object 5 to be tightened while the screw film 3 is drilled, and is fixed with the curing film 9 interposed therebetween. With the tightening, the biting blade 8 provided over the entire circumference at the outermost peripheral portion of the object-to-be-fastened surface portion 7 bites into the curing film 9 and is circular with the same diameter as the outermost periphery of the object-to-be-fastened surface portion 7. The shearing part 10 is formed.
Therefore, after the workpiece 5 is assembled at the installation site and then the curing film 9 is removed as shown in FIG. 3, the circular shearing portion 10 formed on the curing film 9 becomes the outermost peripheral portion of the clamping object facing surface portion. The screw head 4 that forms the outer peripheral portion having the same diameter or smaller diameter than the diameter of the screw head 4 passes through and is easily peeled off from the surface of the article 5 to be tightened.

[Another embodiment 1]
<1> As shown in FIG. 4, the biting blade 8 may be formed in an uneven saw blade shape in the outer peripheral direction of the object-to-be-fastened surface portion 7.
<2> The shape of the screw head 4 is, for example, generally a pan head (FIG. 5A), a truss head (FIG. 5B) as shown in FIGS. , Bind (FIG. 5 (c)), pleasure (FIG. 5 (d)) may be used, and the screw head 4 may have the same diameter as or more than the outermost peripheral portion of the object-facing surface portion 7 to be fastened. What is necessary is just to form the outer peripheral part of the said screw head 4 so that it may have a small diameter part. Moreover, as shown in FIG. 6, the thing which integrally formed the flange part similar to the washer 12 provided with the to-be-fastened object opposing surface part 7 in the screw head may be used.
<3> As shown in FIGS. 2 to 3, the screw head 4 is provided with a plus or minus shaped engaging groove 11 for engaging the rotary tool, or the screw head 4 itself is provided on the outer periphery thereof. For example, a rotation operation unit having a polygonal column shape such as a hexagonal column shape or a quadrangular column shape may be formed so that the rotation operation can be performed with a spanner.
<4> Although the screw device of the present invention is shown as an example in which the biting blade 8 is provided in the drill screw, a general bolt or a tapping screw not provided with a cutting blade at the tip of the screw shaft portion is used instead of the drill screw. Alternatively, a biting blade 8 may be provided on a screw member such as a screw called a general small screw that is attached by being screwed into a female screw that is formed in advance on the article 5 to be tightened.

[Second Embodiment]
Similarly to the above, in the conventional screw device, for example, a resin curing film that protects the surface of the object to be tightened from being damaged is pasted when it is attached to a metal object and shipped in advance. In some cases, the screw device may be attached from above the curing film.
When the screw device is attached to the surface of the object to be tightened from above the curing film, the screw part provided on the screw shaft part bites into the curing film and the object to be tightened along with the rotation operation of the screw shaft part, Fixed while sandwiching a curing film.
However, after the object to be tightened is assembled at the installation site, the curing film must be removed. At that time, the curing film pressed against the surface of the object to be tightened by the screw device cannot be removed cleanly. May remain in a state where the small piece is caught between the screw devices.
The same applies to the case where a washer is fitted on the screw body and used as a screw device.

  Accordingly, an object of the present invention is to enable easy and clean removal of a curing film even if a screw device is previously attached on the curing film.

  As shown in FIGS. 7 to 10, a drill screw device as an example of a screw device has a cutting blade 2 at the distal end of the screw shaft portion 1, and has an outer diameter larger than that of the cutting blade 2 on the proximal end side of the screw shaft portion 1. A screw body 3 having a large screw portion 3, a screw main body 6 having a screw head 4 larger than the outer diameter of the screw portion 3 at the base end, and a washer 12 that fits externally on the screw shaft portion 1 of the screw main body 6. The first contact surface portion 13 of the washer 12 with respect to the object 5 to be tightened is provided with a biting blade 8 that can bite into the surface of the object 5 to be tightened as the screw portion 3 is tightened. The outer periphery is provided over the entire circumference.

As shown in FIG. 2, when the screw device is attached to the surface of the object to be tightened 5 from above the curing film 9, the curing film 9 and the object to be tightened 5 are accompanied with the rotation operation of the screw shaft portion 1. While the cutting blade 2 is drilled, the screw portion 3 provided on the screw shaft portion 1 is bitten, and further, the biting blade 8 provided on the first contact surface of the washer 12 is pushed by the screw head 4 to be cured. The circular shearing portion 10 having the same diameter as the outermost peripheral portion of the first contact surface portion 13 is formed.
Accordingly, when the curing film 9 is removed after the work piece 5 is assembled at the installation site, the circular shearing portion 10 formed on the curing film 9 becomes the outermost portion of the first contact surface portion 13 as shown in FIG. It penetrates the outer periphery and is easily peeled off from the surface of the article 5 to be tightened.

[Another embodiment 2]
<1> The second contact surface portion 15 of the washer 12 with respect to the screw head 4 is formed on a high friction surface so that the screw head 4 and the washer 12 can be rotated together, As shown in (b), the screw head 4 may be formed on an uneven surface that is easy to engage with the object-to-be-fastened surface portion 7. Alternatively, the concave and convex portions may be provided and formed on the engaging surface portions that can be engaged with each other.
<2> Like the biting blade 8 of the first embodiment, the biting blade 8 formed on the washer 12 may be formed in an uneven saw blade shape in the outer circumferential direction as shown in FIG.
<3> By providing the biting blade 8 on the washer 12, the screw head 4 of the screw body 6 may be of a general shape. As shown in FIG. 10, the screw head 4 can be recessed. 14 may be provided on the washer 12.
<4> When the washer 12 is provided, the screw head 4 may be a hexagonal columnar bolt as shown in FIG.
<5> When the biting blade 8 is provided in the washer 12, instead of the drill screw having the cutting blade 2 provided at the tip of the screw shaft portion 1, a general bolt or screw shaft portion as shown in FIG. It can also be used for tapping screws that are not provided with a cutting blade at the tip of the screw or screw members such as screws called general machine screws that are attached by being screwed into a female screw that is formed in advance on the object 5 to be tightened. .

  In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Screw shaft part 2 Cutting blade 3 Screw part 4 Screw head 6 Screw main body 7 Surface to be fastened object 8 Biting blade

Claims (9)

A screw part is provided on the screw shaft part,
A screw device in which a screw body having a screw head larger than an outer diameter of the screw portion is provided at a base end of the screw shaft portion,
Form the outer periphery of the screw head to the same diameter or smaller than the outermost periphery of the surface to be fastened in the screw head,
A screw device in which a biting blade capable of biting into the surface of the object to be tightened along with the tightening of the screw part is provided over the entire outer periphery of the surface of the object to be tightened. A screw part is provided on the screw shaft part,
A screw device in which a screw body having a screw head larger than an outer diameter of the screw portion is provided at a base end of the screw shaft portion,
Providing a washer that is externally fitted to the screw shaft in the screw body;
A biting blade capable of biting into the surface of the object to be tightened as the screw part is tightened is provided on the first outer surface of the first abutting surface part on the entire circumference of the first abutting surface part of the washer with respect to the object to be tightened. A screw device that is provided across.   The screw device according to claim 2, wherein a second contact surface portion of the washer with respect to the screw head is formed on a high friction surface.   The tightening object facing surface portion in the screw head and the second abutting surface portion of the washer facing the tightening object facing surface portion are formed as engaging surface portions that can be engaged with each other. Screw device.   The screw device according to any one of claims 1 to 4, wherein the screw head is provided with an engaging groove for engaging a rotary tool.   The screw device according to any one of claims 1 to 4, wherein an outer peripheral portion of the screw head is formed in a polygonal column-shaped rotation operation portion.   The cross-sectional shape of the biting blade along the screw shaft center is formed on an inclined surface that is farther from the screw shaft center as the inner peripheral surface of the biting blade goes to the tip side, and the outer peripheral surface of the biting blade is the screw shaft The screw device according to any one of claims 1 to 6, wherein the screw device is formed on an inclined surface that is parallel to the center or is further away from the screw axis toward the tip side.   The screw device according to any one of claims 1 to 7, wherein the biting blade is formed in an uneven saw blade shape in an outer peripheral direction of the contact surface portion. The screw shaft portion is provided with a screw portion, and is fitted on a screw body having a screw head larger than the outer diameter of the screw portion at a base end of the screw shaft portion. A washer for a screw device according to claim 1,
The first contact surface portion for the object to be tightened is provided with a biting blade that can bite into the surface of the object to be tightened as the screw portion is tightened over the entire outer periphery of the first contact surface portion. A washer for a screw device.

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