JP3294551B2 - Door frame mounting screws - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door frame mounting screw used for mounting a door frame such as a door of a building, a door of a closet or the like to a support (fixing material), and more particularly to a vertical mounting state of the door frame. The present invention relates to a screw for attaching a door frame, which can finely adjust the diameter.

[0002]

2. Description of the Related Art FIG. 6 is a perspective view showing a conventional screw for mounting a door frame. The door frame mounting screw includes a metal screw shaft 61 and a metal door frame fixing screw cylinder 62.
The screw shaft 61 has a stepped portion 61b provided substantially at the center in the longitudinal direction of the shaft, the base end side of the stepped portion 61b is set as the rod shaft portion 61c, and the distal end side is set as the screwed portion 61a. Further, a hexagonal hole 61d which is depressed inward is formed at the tip of the rod shaft portion 61c.

The screw frame 62 for fixing the door frame is a cylindrical body having upper and lower openings provided with a screw portion 62a on the outer peripheral surface, and is fitted to the rod shaft portion 61c of the screw shaft 61 outside. In this externally fitted state, the screw cylinder 62 has a distal end surface at the step portion 61b and a proximal end surface at the rod shaft portion 61c.
Corresponding to the flange plate portion 61e, it is prevented from falling off and is freely rotatable with respect to the screw shaft 61.

[0004] This door frame mounting screw is a special tool Y
Used by As shown in FIG. 6, the dedicated tool Y continuously protrudes from a shaft portion 71 for rotating operation and a distal end face of the shaft portion 71, and is fitted to the hexagonal hole 61d so as to be able to be fitted and removed. And a hexagonal rod shaft 72. A plurality of engaging projections 7 centering on a hexagonal rod shaft 72 are provided on the distal end surface of the shaft portion 71.
3 protrudes in a circle.

[0005] In use, a hexagonal rod shaft 72 of a special tool is used.
Into the hexagonal hole 61d. At this time, the engaging projection 73 is fitted and locked to the fitting portion 62b at the proximal end of the screw cylinder 62. As a result, the door frame fixing screw 62 and the screw shaft 61 are integrated, and are rotated together by the rotation of the rotation operation shaft (dedicated tool Y) 71. As shown in FIG. 7, when the screw shaft 61 is inserted into the through hole of the door frame and the screw for mounting the door frame is rotated with the special tool Y, the screw shaft 61 advances (screws) into the support 5. When the screw cylinder 62 enters while threading the inner peripheral surface of the through hole, the door frame and the support are fixed.

For the fine adjustment of the vertical state of the door frame fixed to the support, a special dedicated tool for rotating only the screw shaft 61 is used. That is, the engaging projection 7 that engages with the fitting portion 62b
The screw shaft 61 alone is reversely rotated by using a dedicated tool having no hexagonal bar shaft 72 fitted in the hexagonal hole 61d without the screw shaft 61. At this time, the screw cylinder 62 is fixed to the door frame (the inner peripheral surface of the through hole). Therefore, the linear motion caused by the reverse rotation of only the screw shaft 61 acts on the door frame integral (screwed) with the screw cylinder 62, and the door frame moves in the direction away from the support. Thereby, the vertical state of the door frame can be finely adjusted.

[0007]

A conventional screw for mounting a door frame has a structure in which a screw cylinder 62 for fixing a door frame made of metal is fitted around a metal screw shaft 61. Accordingly, since the screw shaft 61 and the door frame fixing screw cylinder 62 are fitted to each other so as to be rotatable with each other in a normal state, the door frame fixing screw cylinder 62 is free to move a small distance in the axial longitudinal direction. ing. Since the direction of axial movement (play) of the screw cylinder 62 for fixing the door frame is the direction of fine adjustment of the door frame, there is a disadvantage that accurate fine adjustment is hindered.

Further, the conventional screw for mounting the door frame does not require a special tool for rotating the screw shaft and the screw cylinder for fixing the door frame integrally. In the case of rotation, special special tools are required separately, and these special tools are not allowed to be expensive, and there are disadvantages such as troublesome work.

The present invention solves the above-mentioned problems, eliminates play in the longitudinal direction of the shaft between the screw shaft and the door frame fixing member, enables accurate fine adjustment of the door frame, and has a special special tool. It is an object of the present invention to provide an inexpensive and easy-to-operate door frame mounting screw which does not require any of the above.

[0010]

In order to achieve this object, a door frame mounting screw according to the present invention has the following configuration. The door frame mounting screw includes a screw shaft that fits into the through hole of the door frame, and a door frame fixing member provided on the base end including the head of the screw shaft. The door frame fixing member is a screw shaft base end. A disk having a constant thickness covering the outer peripheral surface on the side and the outer peripheral portion on the upper surface of the screw shaft head is set to have a diameter slightly larger than the diameter of the through hole of the door frame.

In the door frame mounting screw having such a configuration, the screw shaft is inserted into the through hole of the door frame. In this state, the upper part of the door frame fixing member is located above the upper surface of the through hole, and the tip of the screw shaft is located on the upper surface of the column. Here, a normal screwdriver is inserted into a plus groove on the upper surface of the screw shaft head that comes out of the door frame fixing member, and the screw shaft is rotated. When the screw shaft rotates and the tip of the screw shaft enters the support, the direct power of the screw shaft draws the door frame fixing member (the large-diameter upper portion) into the through hole. Thereby, the side peripheral surface of the door frame fixing member (a disk having a certain thickness) is tightly fitted to the inner peripheral surface of the through hole. The door frame fixing member and the door frame are firmly fixed by the large contact surface frictional force. Then, by completely fixing the screw shaft to the support, the door frame is fixed to the support.

For fine adjustment of the vertical state of the mounted door frame, the screw shaft is reversely rotated by a normal screwdriver. At this time, the door frame fixing member is firmly fixed to the inner peripheral surface of the through hole by the contact surface frictional force. Therefore, the door frame fixing member does not rotate, only the screw shaft rotates, and the reverse direct power of the screw shaft acts on the door frame via the door frame fixing member. As a result, the fine adjustment of the vertical state of the door frame can be performed by moving the door frame in a direction away from the column.

The door frame fixing member is formed integrally with the outer surface on the head side of the metal screw shaft by resin molding.
Therefore, since there is no play between the screw shaft and the door frame fixing member in the shaft longitudinal direction, fine adjustment of the door frame can be accurately performed.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a door frame mounting screw according to the present invention.

FIG. 2 is a perspective view showing a screw A for attaching a door frame according to the present invention. The screw A for attaching the door frame includes the screw shaft 2 and the door frame fixing member 1 provided on the base end side including the head 22 of the screw shaft 2.

The screw shaft 2 is made of metal in the embodiment, and includes a screw shaft portion 21 and a head portion 22. In the plane of the upper surface of the head 22, there is a Phillips groove 2 that matches a regular Phillips screwdriver.
2a is recessed.

The door frame fixing member 1 is made of a synthetic resin. As the resin, for example, a hard thermoplastic resin or a thermosetting resin is used. For example, polyethylene, polypropylene, AS resin and the like are used as the thermoplastic resin, and melamine resin and urea resin are used as the thermosetting resin. In this embodiment, using polypropylene,
The base end (including the head 22) of the metal screw shaft 2 is integrally formed by molding.

The door frame fixing member 1 is integrally formed with the screw shaft 2 by resin filling. The joint between the screw shaft 2 and the door frame fixing member 1 is in contact with each other without any gap, and is in the longitudinal direction of the shaft. Is set to have no play at all. That is, in a normal state (in a state where a force equal to or more than a predetermined force is not applied), the screw shaft 2 and the door frame fixing member 1 are integrally formed.

The door frame fixing member 1 is specifically a disk having a constant thickness, and may have the same diameter in the vertical direction (thickness direction), that is, a flat cylindrical shape having a low height. The upper diameter of the disk is set large to facilitate the drawing into the through hole 41a.

The door frame fixing member 1 according to the embodiment is set to a tapered disk having a predetermined thickness whose diameter is reduced in a downward direction, and includes a base end outer periphery including a head portion 22 of the screw shaft 2. And the outer periphery of the upper surface of the screw shaft head 22. That is,
The upper part of the upper surface of the screw shaft head 22 (the surface where the plus groove 22 a is located) is defined as the space 12, that is, the protrusion of the head 22.

As shown in FIG. 1, the door frame fixing member 1 has a large upper portion (large upper portion 11) and a lower portion slightly larger than the diameter of the through hole 41 formed in the door frame 4 in advance. It has a small diameter taper. The through hole 41 of the door frame 4 includes an upper large-diameter hole 41a and a lower small-diameter hole 41b communicating with the large-diameter hole 41a. That is, in the normal state, the screw portion 21 of the screw shaft 2 can easily fit and insert the small-diameter hole portion 41b, and the large-diameter upper portion 11 of the door frame fixing member 1 cannot be easily fitted and inserted into the large-diameter hole portion 41a. It is set as follows.

When the door frame 4 is fixed to the column (door frame fixing member) 5 using the door frame fixing screw A having such a configuration, and the vertical state of the door frame 4 is finely adjusted, It is performed as follows.

FIG. 1 is a reference sectional view showing a state in which a screw A for attaching a door frame is inserted into a through hole 41 of a door frame 4. When the screw A for attaching the door frame is inserted into the through hole 41,
The tip of the screw portion 21 of the screw shaft 2 is fitted into the small-diameter hole 41 b, and the tip is in contact with the upper surface of the support 5. In this state, the large-diameter upper portion 11 of the door frame fixing member 1 is slightly larger than the diameter of the through-hole (large-diameter hole portion 41 a) 41.
Can not fit into

In this state, the plus groove 22a of the head 22 protruding from the door frame fixing member 1 through the space 12
Insert a normal screwdriver into the screw A
Is rotated. At this time, the lower peripheral surface of the large-diameter upper portion 11 of the door frame fixing member 1 closely contacts the inner peripheral surface of the through hole 41a. Therefore, a greater force acts on the contact surface between the door frame fixing member 1 and the screw shaft 2 than the contact surface force (integral force) without a gap between the door frame fixing member 1 and the screw shaft 2, resulting in the screw shaft 2.
Only rotate.

As shown in FIG. 3, when the screw shaft 2 rotates and the tip of the screw shaft 2 enters (screws in) into the column 5, the direct power of the screw shaft 2 is applied to the door frame fixing member (large-diameter upper part). 11) 1 is drawn into the large-diameter hole portion 41a. As a result, the side peripheral surface of the large-diameter upper portion 11 is fitted into the inner peripheral surface of the large-diameter hole portion 41a in a tightly-stretched and locked state. In other words, the door frame 4 and the screw A for mounting the door frame are firmly fixed by a large frictional force generated between the contact surface between the outer peripheral surface of the large-diameter upper portion 11 and the inner peripheral surface of the large-diameter hole portion 41a, and are integrated. .

In this state, as the distal end of the screw shaft 2 enters (screws) deeply into the column 5, the door frame fixing member 1 is drawn deeply into the large-diameter hole 41a. Then, when the screw shaft 2 is screwed (entered) into the column 5 until the bottom of the door frame fixing member 1 comes into contact with the bottom surface of the large-diameter hole 41, the door frame 4 comes into full contact with the column 5 and is fixed. Is done.

When finely adjusting the vertical state of the door frame 4 attached and fixed to the column 5, the screw shaft 2 is reversely rotated by a screwdriver as shown in FIG. At this time, the large-diameter upper part 11 is firmly friction-fixed to the inner peripheral surface of the large-diameter hole 41a. Therefore, the reverse direct power of the screw shaft 21 rotating in the reverse direction acts on the door frame 4 integrated with the door frame fixing member 1 via the door frame fixing member 1. Therefore, the fine adjustment of the vertical state of the door frame 4 is realized by moving the door frame 4 in a direction away from the column 5.

The door frame fixing member 1 is formed integrally with the metal screw shaft 2 by resin molding, and there is no play between the screw shaft 2 and the door frame fixing member 1 in the longitudinal direction of the shaft. Therefore, accurate fine adjustment of the door frame 4 can be easily performed.

As shown in FIG. 5, the door frame mounting screw A
Fixes the door frame 4 and the column 5 as described above. The door (door plate) 4A is attached via a hinge 4B on one side surface of the door frame 4, and the door plate 4A is liable to be inclined by its own weight and gravity. On the other hand, door frame mounting screw A
Are mounted on both sides of the door frame 4 at predetermined intervals in the vertical direction, and two door frame mounting screws A are mounted on the upper portion of the door frame 4.

The vertical state of the door frame 4 is maintained by finely adjusting each of the eight door frame mounting screws A. With a normal screwdriver, the screw A for attaching the door frame can be attached by an extremely simple operation without skill, and the vertical state of the door frame 4 can be finely adjusted by a simple operation.

[0031]

According to the present invention, as described above, a resin door frame fixing member is integrally formed on the base end including the head of the metal screw shaft, and the door frame fixing member is directly moved by the screw shaft. The door frame and the door frame fixing member are fixed by a strong frictional force because they are drawn into the through hole of the frame and tightly fitted. Can be fine-tuned. In addition, since the door frame fixing member is formed integrally with the screw shaft by resin molding, the joint between the screw shaft and the door frame fixing member is in contact with no gap, and is set integrally with no play in the shaft longitudinal direction. Therefore, the vertical state of the mounting door frame can be finely adjusted accurately. Furthermore, since the screw for door frame mounting can rotate only the screw shaft by a simple operation of simply fitting a normal screwdriver into the plus groove of the screw head,
No special tools for mounting the door frame and special tools for fine adjustment of the vertical state of the door frame as in the past are required, and the fine adjustment operation can be performed very easily and inexpensively without requiring any skill in work. And has an excellent effect of achieving the object of the invention.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a state in which a door frame mounting screw is fitted and inserted into a door frame through hole.

FIG. 2 is a perspective view showing a door frame mounting screw.

FIG. 3 is a cross-sectional view showing a state where a door frame and a support are fixed with door frame mounting screws.

FIG. 4 is a cross-sectional view showing a state in which the vertical state of the door frame is finely adjusted.

FIG. 5 is a front view showing a state where the door frame is attached to a support.

FIG. 6 is an exploded perspective view showing a conventional door frame mounting screw and a dedicated tool.

FIG. 7 is a cross-sectional view showing a conventional method of fixing a door frame and a support by a door frame mounting screw.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door frame fixing member 2 Screw shaft 4 Door frame 5 Prop 11 Large-diameter upper part 12 Space part 21 Screw part 22 Screw shaft head 41 Through hole

Claims (2)

(57) [Claims] 1. A resin door frame fixing member is integrally formed on a base end including a head portion of a metal screw shaft, and the door frame fixing member is drawn into a through hole of the door frame by direct movement of the screw shaft to tightly close the door frame fixing member. A door frame fixing screw that is fitted and fixed between the door frame and the door frame fixing member with strong frictional force. 2. The door frame fixing member according to claim 1, wherein the diameter of the base end is slightly larger than the diameter of the through hole of the door frame, and the diameter of the tip is smaller. 1
Screw for mounting the door frame as described.