JP2009103175A - Structure for driving machine screw through member, and machine screw - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for driving a machine screw through a member capable of driving the machine screw through the member under a through condition with a predetermined fixed depth, enabling the work at good working efficiency by using a power tool, and protecting a member interposed between a machine screw head part and the member. <P>SOLUTION: A shaft part 9 of the machine screw 2 is provided with a screw shaft part 9a at a rip end side, a small diameter shaft part 9b, and a boundary step part 9d. The machine screw 2 is driven to a plate part 3a as the member under a condition where the screw shaft part 9a goes over the plate part 3a, the small diameter shaft part 9b is positioned in a hole 10 of the plate part 3a in such a manner that the same can idly turn, and the boundary step part 9d is positioned at a near side than the hole 10 of the plate part 3a and opposes to a circumference edge part of the hole 10. The machine screw is prevented from coming off by abutment of the screw shaft part 9a and the plate part 3a, and is prevented from being driven deeper by abutment of the boundary step part 9d and the plate part 3a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a structure for screwing a screw into a member and a screw.

  On the outer wall panel, the hook metal that holds the rear surface of the outer wall material in a hooked state is used with a screw, a power tool such as air or electric power, and the plate part of the steel panel frame with polystyrene base and glass wool board And may be attached via.

For example, in such a case, if the screw is an ordinary screw, the screw head and the hook metal are engaged, and the polystyrene base and the glass wool board are sandwiched between the hook metal and the plate portion of the panel frame. As a means to prevent the occurrence of such subduction, work on the torque of the power tool while visually checking the screw insertion depth. Generally, a method in which a person performs control by hand and drives a screw is employed.
JP 2005-315049 A

  However, in the above method, there is a problem that cautiousness is required to properly drive a single screw, and workability of screw driving is reduced.

  In the present invention, for example, in view of the above-described problems, a screw can be driven into a through state with a predetermined constant depth with respect to a member, and this is performed with good workability using a power tool. It is another object of the present invention to provide a structure for screwing a screw into a member and a screw that can protect the member interposed between the screw head and the member.

The above-described problem is that the screw includes a head portion having a tool engaging portion, and a shaft portion.
The screw shaft is
The screw shaft on the tip side,
Continuing to the base end side of the screw shaft portion, provided in the axial middle portion of the screw shaft portion, the diameter is smaller than the screw shaft portion, and the length dimension is equal to or larger than the thickness dimension of the member. A small shaft portion,
It is connected to the base end side of the small-diameter shaft portion and is a boundary portion between the large-diameter portion whose diameter is larger than that of the small-diameter shaft portion and the small-diameter shaft portion, and is provided in the intermediate portion in the axial direction of the screw shaft portion. A border step,
With
The screw has a screw shaft portion that exceeds the member, a small-diameter shaft portion is positioned so as to be able to idle in the hole of the member, and the boundary step portion is positioned in front of the hole of the member so that the peripheral edge of the hole It is driven so as to be in a state of being opposed to the part, and is prevented from coming off by contact between the screw shaft part and the member, and is prevented from advancing to the back by contact between the boundary step part and the member. This is solved by a through-penetration structure of a screw into a member (first invention).

  In this structure, in the process of driving a screw into a member using a power tool, if the screw shaft part exceeds the member and the small diameter shaft part is located in the hole of the member, the screw has a large diameter part and a small diameter shaft. The boundary step with the part abuts the peripheral edge of the hole of the member and is not driven deeper than that, so that the screw can be driven into the member at a predetermined constant depth.

  Moreover, in a state where the screw shaft portion exceeds the member, the small diameter shaft portion is located in the hole of the member, and the boundary step portion between the large diameter portion and the small diameter shaft portion is in contact with the peripheral portion of the hole of the member, Even if the power tool is in the driving state, the screw only idles, so there is no need for the operator to drive the screw while controlling the torque of the power tool. It is only necessary to perform an operation of stopping driving, and screwing can be performed with good workability.

  In addition, since the boundary step portion is provided in the axial direction intermediate portion of the screw shaft portion and has a structure that maintains a space between the screw head portion, the space dimension between the screw head portion and the member Can be prevented from becoming smaller than a certain level, and a member interposed between the screw head and the member can be protected.

Moreover, the head provided with the tool engaging part, and the shaft part,
The screw shaft is
The screw shaft on the tip side,
Continuing to the base end side of the screw shaft portion, it is provided in the axial middle portion of the screw shaft portion, the diameter is smaller than the screw shaft portion, and the length dimension is equal to or larger than the thickness dimension of the member. A small shaft portion,
It is connected to the base end side of the small-diameter shaft portion, and is provided at an intermediate portion in the axial direction of the screw shaft portion, which is a boundary portion between the large-diameter portion having a larger diameter than the small-diameter shaft portion and the small-diameter shaft portion. A border step,
With
The screw shaft part exceeds the member with respect to the member, the small-diameter shaft part is positioned so as to be able to idle in the hole of the member, and the boundary step part is positioned in front of the hole of the member and faces the peripheral part of the hole. By being driven so as to be in a state, the screw shaft part and the member are prevented from coming out, and the boundary step part and the member are brought into contact with the back so that advancement to the back is prevented. The same effects as those of the first invention can also be achieved with respect to the screw (second invention) used in the feature of the screw penetration driving structure into the member.

  Since the present invention is as described above, it is possible to drive a screw into a penetrating state of a predetermined constant depth with respect to a member, and to perform it with good workability using a power tool. In addition, the member interposed between the screw head and the member can be protected.

  Next, the best mode for carrying out the present invention will be described with reference to the drawings.

  In the embodiment shown in FIGS. 1 to 3, as shown in FIGS. 3 (a) and 3 (b), the hook metal 1 for holding the rear surface portion of the outer wall surface material 4 such as a ceramic industry in a hooked state is provided. The screw 2 is applied to the plate portion 3a of the steel panel frame 3 through the polystyrene base 5 and the glass wool board 6.

  As shown in FIGS. 1 (A) and 1 (B), the screw 2 includes a head portion 8 having a tool engaging portion 7 and a shaft portion 9. The screw shaft portion 9 is a screw shaft on the tip side. A portion 9a, a small-diameter shaft portion 9b, and a large-diameter shaft portion 9c as a large-diameter portion are provided.

  The small-diameter shaft portion 9b is connected to the proximal end side of the screw shaft portion 9a and is provided in the intermediate portion in the axial direction of the screw shaft portion 9. The diameter a is smaller than the diameter b of the screw shaft portion 9a and has a length dimension. c is set to be substantially the same as the thickness dimension d of the plate portion 3a.

  The large-diameter shaft portion 9c is connected to the proximal end side of the small-diameter shaft portion 9b and extends to the screw head portion 8, and the diameter e is larger than the diameter a of the small-diameter shaft portion 9b. A step portion 9d facing the tip side of the screw shaft portion 9 is formed at the boundary between the large diameter shaft portion 9c and the small diameter shaft portion 9b. In the present embodiment, the boundary step portion 9d is formed of a conical slope portion that opens toward the screw base end direction.

  The length dimension f of the large-diameter shaft portion 9c, that is, the distance dimension f between the boundary step portion 9d and the screw head 8 is determined by the length dimension g of the screw through hole 1a of the hook 1 and the polystyrene base 5 In consideration of the thickness dimension h of the glass wool board 6 and the thickness dimension i of the glass wool board 6, in the state after screwing, the polystyrene base 5 and the glass wool board 6 do not undesirably sink, and the boundary step It is designed to have such a size as not to cause an unintended gap between the portion 9d, the screw head 8, the hook metal 1, the polystyrene base 5, and the glass wool board 6.

  As shown in FIG. 1B, the hook metal 1 is attached to the panel frame 3 by placing the glass wool board 6 and the polystyrene base 5 on the plate portion 3a of the panel frame 3, and the glass wool board 6 and polystyrene. After opening the through hole 10 in the plate portion 3a of the panel frame 3 through the base 5, the shaft portion 9 of the screw 2 is passed through the through hole 1a of the hook 1 as shown in FIG. Through the polystyrene base 5 and the glass wool board 6, the tip of the screw shaft portion 9a is pushed into the lower hole 10 of the plate portion 3a of the panel frame 3 and, as shown in FIG. Drive and rotate the tool and drive in.

  In the process, as shown in FIG. 2C, when the screw shaft portion 9a exceeds the plate portion 3a and the small-diameter shaft portion 9b is positioned in the hole 10 of the plate portion 3a, the screw 2 is idled and the boundary The step 9d comes into contact with the peripheral edge of the hole 10 in the plate portion 3a, and driving is completed. As shown in FIG. 2 (d), the screw 2 is removed by the contact between the screw shaft portion 9a and the plate portion 3a. Is prevented from advancing to the back by the contact between the boundary step portion 9d and the plate portion 3a. It will be attached.

  According to the above screw penetration driving structure, as described above, in the process of driving the screw 2 into the plate portion 3a using the power tool, the screw shaft portion 9a exceeds the plate portion 3a, and the small diameter shaft portion 9b When the screw 2 is located in the hole 10 of the plate portion 3a, the boundary step portion 9d abuts on the peripheral edge portion of the hole 10 of the plate portion 3a and is not driven any deeper, whereby the screw 2 is moved to the plate portion 3a. In contrast, it can be driven into a penetration state of a predetermined constant depth.

  Moreover, in a state where the screw shaft portion 9a exceeds the plate portion 3a, the small-diameter shaft portion 9b is located in the hole 10 of the plate portion 3a, and the boundary step portion 9d is in contact with the peripheral edge portion of the hole 10 of the plate portion 3a. Even if the power tool is in the driving state, the screw 2 only runs idle, so there is no need for the operator to drive the screw while controlling the torque of the power tool. It is only necessary to perform an operation of stopping the driving of the tool, and screwing can be performed with good workability.

  In addition, since the boundary step portion 9d is provided in the middle portion of the screw shaft portion 9 in the axial direction and has a structure that maintains a space between the screw head portion 8, the screw head portion 8 and the plate portion 3a. It is possible to prevent the distance between them from becoming smaller than a certain level, and to prevent the polystyrene base 5 and the glass wool board 6 from sinking due to overtightening.

  Further, in the above embodiment, the length dimension c of the small-diameter shaft portion 9b is made substantially the same as the thickness dimension d of the plate portion 3a, so that it is interposed between the screw head 8 and the plate portion 3a. Even if a part or all of the other members have elasticity as described above, the backlash in the push-pull direction of the screw 2 in the penetration driving state can be reduced.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above embodiment, the case where the boundary step portion 9d in the screw shaft portion 9 is formed of a step portion formed at the boundary portion between the small diameter shaft portion 9b and the large diameter shaft portion 9c is shown. Instead of the portion, a collar-shaped large diameter portion may be provided, and a step portion formed at the boundary portion between the collar-shaped portion and the small-diameter shaft portion may be used as the boundary step portion.

  In the above embodiment, the case where the length dimension c of the small-diameter shaft portion 9b is made substantially the same as the thickness dimension d of the plate portion 3a is shown. It may be larger than the thickness dimension d of the portion 3a, and even in that case, the screw 2 can maintain the connection with the plate portion 3a and does not come off.

  In the above embodiment, the present invention is applied to the case where the hook 1 on the outer wall panel is attached to the plate portion of the panel frame 3 with the screws 2 via the polystyrene base 5 and the glass wool board 6. However, the present invention is not limited to this, and can be widely used in a case where screws are penetrated into various members, and there is no limitation on the members interposed between the members and the screw heads.

  In the above-described embodiment, the case where the lower hole 10 is formed in the plate portion 3a of the panel frame 3 as a member has been shown. However, the lower hole 10 is not provided, and the member is inserted into the member such as the plate portion 3a. It may have a structure in which it is punched and driven.

FIG. 1A is a front view showing a screw of the embodiment, and FIG. 2B is a partially sectional exploded front view of a screw penetration driving structure using the screw. FIGS. 1A to 1D are partial cross-sectional front views sequentially showing a screwing process. Fig. (A) is a cross-sectional front view showing a state before the rear portion of the outer wall surface material is hooked on the hook metal of the panel frame, and Fig. (B) is a cross-section showing the state after the hook is attached. It is a front view.

Explanation of symbols

2 ... Screw 3 ... Panel frame 3a ... Plate part (member)
7 ... Tool engaging portion 8 ... Screw head 9 ... Screw shaft portion 9a ... Screw shaft portion 9b ... Small diameter shaft portion 9c ... Large diameter shaft portion (large diameter portion)
9d ... Boundary step 10 ... hole

Claims (2)

The screw includes a head portion having a tool engaging portion and a shaft portion,
The screw shaft is
The screw shaft on the tip side,
Continuing to the base end side of the screw shaft portion, it is provided in the axial middle portion of the screw shaft portion, the diameter is smaller than the screw shaft portion, and the length dimension is equal to or larger than the thickness dimension of the member. A small shaft portion,
It is connected to the base end side of the small-diameter shaft portion, and is provided at an intermediate portion in the axial direction of the screw shaft portion, which is a boundary portion between the large-diameter portion having a larger diameter than the small-diameter shaft portion and the small-diameter shaft portion. A border step,
With
The screw has a screw shaft portion that exceeds the member, a small-diameter shaft portion is positioned so as to be able to idle in the hole of the member, and the boundary step is positioned in front of the hole of the member so that the peripheral edge of the hole It is driven so as to be in a state of being opposed to the part, and is prevented from coming off by the contact between the screw shaft part and the member, and is prevented from advancing to the back by the contact between the boundary step part and the member. A structure for screwing a screw into a member. A head portion including a tool engaging portion, and a shaft portion;
The screw shaft is
The screw shaft on the tip side,
Continuing to the base end side of the screw shaft portion, it is provided in the axial middle portion of the screw shaft portion, the diameter is smaller than the screw shaft portion, and the length dimension is equal to or larger than the thickness dimension of the member. A small shaft portion,
It is connected to the base end side of the small-diameter shaft portion, and is provided at an intermediate portion in the axial direction of the screw shaft portion, which is a boundary portion between the large-diameter portion having a larger diameter than the small-diameter shaft portion and the small-diameter shaft portion. A border step,
With
The screw shaft part exceeds the member with respect to the member, the small-diameter shaft part is positioned so as to be able to idle in the hole of the member, and the boundary step part is positioned in front of the hole of the member and faces the peripheral part of the hole. By being driven so as to be in a state, the screw shaft part and the member are prevented from coming out, and the boundary step part and the member are brought into contact with the back so that advancement to the back is prevented. A screw used for a structure for screwing a screw into a member.

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