JPH0246752B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a door stop that absorbs the impact load of an open door while engaging and stopping at the open position. This relates to a door stop that prevents a support shaft portion screwed onto an anchor bolt from inadvertently rotating even when subjected to the impact force of a door.

(Prior Art) Conventionally, an inverted L-shaped door stop, in which one end of a horizontal shock absorber is fixed from the upper end of a support shaft, has been used as a door stop screwed onto an anchor bolt set on the floor.
A doorstop with such a structure should be placed in a direction perpendicular to or perpendicular to the door surface that it collides with, with the axis of the horizontally arranged buffer body open. However, it is difficult to expect reliable positioning during installation work by field workers, and the impact force of the opening door will generate torque or component force in the rotational direction against the tip of the shock absorber, and this force will be applied to the door. It is loaded repeatedly every time you open it. As a result, the door stop rotates and changes direction, making it impossible to stop the door by absorbing the impact force of the door, and also making it impossible to moor the door at the stopping position with the hanging ring. In order to eliminate such drawbacks, the upper end of the support shaft is attached to the metal core material of the buffer body in advance, or is attached with a threaded rod. In addition, when the anchor bolt cannot be fixed to the concrete floor and erected, the seat plate fixed to the floor with screws and the flange at the lower end of the bolt are fixed in advance at the time of manufacture via a rotation prevention means consisting of an engaging protrusion and a notch. It is easy to do so. However, it is extremely difficult to provide a locking and fixing means at the site where the support shaft is screwed onto the anchor bolt during field work. Even if the spindle is screwed onto the floor or the seat plate on the floor using the screw hole,
It is almost impossible to arrange the axis of the shock absorber in a direction perpendicular to the door surface, and the axis must be aligned in the direction perpendicular to the door surface by unscrewing it from the tightened state. No. Therefore, the support shaft can be easily rotated by the impact force of the door.

The first conventional technology disclosed in Japanese Utility Model Application Publication No. 54-111341 (positioning device for concrete door stop) uses a tightening nut screwed onto the anchor bolt to prevent it from slipping out of the floor. are doing.
The upper end of the anchor bolt is provided with a positioning guide portion such as a groove or a square protrusion for collimating the axial direction of the cushion rubber. The support shaft provided with the seat plate for the decorative cover is configured so that it is not screwed into the middle part of the anchor bolt and tightened.

The second prior art disclosed in Japanese Utility Model Application Publication No. 51-45827 (door stop) stands up a bolt whose head is engaged through a hole in a retaining plate 13 that is fixed to the floor using screws. A spindle equipped with a cover plate as a decorative cover is screwed onto a bolt, and the prismatic tightening portion formed at the bottom end of the spindle is firmly screwed with a tool such as a spanner to connect the spindle with a flat bottom end. The support shaft is fixed to the floor by tightening the retaining plate with the head of the bolt. However, since the horizontal cylinder does not stop in a specific direction when the support shaft is tightened and fixed, the male threaded end of the cushion rubber is engaged with the groove on the circumference of the upper end of the support shaft, and the cushion rubber is moved in a direction perpendicular to the open door surface. It is to be installed.

The third prior art disclosed in Japanese Utility Model Application Publication No. 50-7942 (door stopper) involves raising a bolt with a head from a through hole in a disc-shaped base fixed to the floor surface and screwing the nut into the bolt. The bolt is tightened and fixed to the floor surface, and the lower end surface of the support shaft screwed onto the bolt is pressed into contact with a second nut.

(Problem to be solved by the invention) However, in the first prior art,
The support shaft screwed onto the anchor bolt is a horizontal cylindrical body with a cushion rubber that is screwed together until it is perpendicular to the open door surface, and there is no need to tighten or fix the support shaft to the fixed seat plate or floor surface. do not have.

In the second prior art, the support shaft is screwed onto a bolt and fastened to the presser plate, but the axis of the cushion rubber cannot be arranged in a predetermined direction. Therefore, the cushion rubber is fixed by engaging the tip of the male screw with the groove of the support shaft. However, due to the repeated impact force of the door and the expansion and contraction of the rubber, the male screw tip and groove are damaged early, making it impossible to maintain the predetermined installation position.

The third conventional technology is a support shaft screwed onto a bolt and a second
When the impact force of the door is applied to the shock absorber, the second nut also rotates as the support shaft rotates (so-called co-rotation phenomenon). Therefore, there was a problem in that no tightening and fixing means were provided.

The present invention has been made in view of the above-mentioned problems of the conventional technology, and its purpose is to provide a shock absorber for a door stop that is disposed perpendicularly to the surface of an open door. To provide a door stop that is securely fixed without causing the installation direction to change or rotate inadvertently even when the door stop is repeatedly subjected to door opening impact force.

(Means for Solving the Problems) In order to achieve the above object, the doorstop of the present invention has anchor bolts planted in the concrete floor,
The male thread of the anchor bolt is provided with a support shaft that is screwed into the male thread through a shaft hole with a female thread, and a horizontal buffer is fixed to the upper end of the support shaft. On the other hand, a nut is screwed into the male screw cut into the lower end of the support shaft, and the nut is rotated to unscrew it to be tightened and fixed to the floor.

(Function) The anchor bolt that attaches the door stop is buried when the concrete slab for the floor is poured, and the lower end of the anchor bolt is formed in an L-shape or hook shape and rotates due to the impact of the door. It is something that never happens. If you want to fix it upright on the completed floor later, make a protrusion in advance on the seat plate that will be fixed to the floor with screws, and make a notch in the lower end flange of the bolt that will stand up from the seat plate to prevent rotation due to external impact force. A blocking structure can be easily created during manufacturing.

When the support shaft is screwed into the anchor bolt through the female thread of the shaft hole, the lower edge of the support shaft is tightened and fixed to the upper surface of the seat plate fixed to the floor, but at this time the axial direction of the shock absorber is It is almost never the case that the predetermined arrangement is perpendicular to the open door surface. Therefore, the screws must be unscrewed until the desired cushioning arrangement is achieved. This releases the tightness from the seat plate and puts it in a relaxed state. In this state, one hand grasps the shock absorber and holds it in a predetermined direction, and the other hand holds a tool such as a spanner and rotates the nut to tighten it to the seat plate. If the support shafts rotate together during the nut tightening operation and an error occurs in the direction of the buffer, loosen the nut and tighten the nut again. Since the shock absorber has a slight error from a predetermined direction due to visual collimation on-site work, it will not easily rotate due to the impact of the door due to the strong tightening force. The tightening nut has a strong frictional force against the seat plate, and the female thread of the nut and the male thread on the outer periphery of the support shaft firmly engage and push the support shaft upward, and the female thread of the support shaft and the male thread of the anchor bolt By engaging more strongly and pushing the support shaft upward, the inner and outer circumferential surfaces of the support shaft engage and generate a strong frictional force.

When the nuts are screwed onto the anchor bolts and the seat plate is tightened, the seat plate may deform and be crimped to the floor. It won't hurt you.

The diameter of the nut threaded part of the support shaft should be small as long as the friction and strength are not reduced. This makes the decorative cover interposed on the support shaft as small as possible so that it does not become an obstacle when opening the door, and maintains a harmonious shape in appearance.

Although the structure of the shock absorber provided at the upper end of the support shaft is not shown in the drawings, the core material of the shock absorber is integrally formed with the support shaft by screwing and tightening the core material together with the support shaft using small-diameter bolts during manufacture.

(Example) Examples will be described with reference to the drawings.

The first embodiment shown in FIG. 1 is an inverted L-shaped door stop 1 in which a shock absorber 3 made of an elastic material such as rubber is disposed horizontally from the upper end of a support shaft 2 that stands up on the floor. It is.

As shown in Fig. 2, the door stop 1 has an anchor bolt 5 that is buried in the concrete floor and stands up from the floor surface 4.
It has a configuration that allows it to be used. Although not shown, the lower end of the anchor bolt has a hook and is firmly embedded so as not to rotate.

A seat plate 9 having a through hole 15 in the center of the anchor bolt 5 is interposed, and the seat plate 9 is fixed to the concrete floor surface with tapping screws 8.

The support shaft 2 is made of a metal material and has a cylindrical shape. A shaft hole 10 is bored from the lower end surface of the support shaft 2, and a female thread is carved into the shaft hole. The support shaft 2 is screwed onto the anchor bolt via the female thread of this shaft hole.

The lower end portion of the support shaft 2 has a slightly smaller diameter than the upper portion, and this small diameter portion 12 is provided with a male thread.
A nut 11 is screwed into this small diameter portion 12, and when the nut 11 is screwed into the small diameter portion 12 and brought into contact with the stepped portion at the upper end, the lower end surface of the small diameter portion 12 protrudes slightly downward from the lower surface of the nut. There is. This structure was achieved by screwing the support shaft 2 onto the anchor bolt, first pressing the small diameter lower end surface of the support shaft against the seat plate 9,
Then, unscrew the axial direction of the shock absorber to the direction perpendicular to the open door surface, and while maintaining this unscrewed state, tighten the nut 11 to the seat plate 9 by rotating the nut 11 once, making the installation operation simple and reliable on site. This is to make it happen.

A hemispherical decorative cover 13 is inserted in advance into a through hole provided at the center of the support shaft 2. When this decorative cover 13 is placed on the floor surface 4, it covers the seat plate 9 and the nut 11 to make the door stop beautiful. A protrusion 19 is formed inwardly on the outer peripheral edge of the decorative cover 13 by press working. By engaging the protrusion 19 with the notch 20 of the seat plate 9, the decorative cover will not be easily rotated or moved.

Holes are provided in the upper part of the support shaft 2 at both circumferential positions opposite to each other in a direction perpendicular to the axis of the shock absorber, and a hanging ring 14 having both ends fitted into both holes is pivotably supported. . This hanging ring 14 is rotated and the tip end is attached to the buffer body 3.
When placed on the tip side of the door, it engages with a hook (not shown) provided on the open door and locks the door in the open position. When the disposed shock absorber 3 rotates together with the support shaft 2 due to the impact force of opening the door and its direction is deviated, the hanging ring cannot be hung on the hook.

Although the shock absorber 3 is disposed horizontally from the upper end of the support shaft 2, and is not shown, its metal core material is screwed together with the upper end of the support shaft using a threaded lever to be firmly fixed.

A door stop 6 according to the second embodiment shown in FIG. 3 is mounted horizontally on a wall made of wood or synthetic resin of a building, or on a baseboard 7 provided on the wall. This door stop 6 differs from the door stop 1 of the first embodiment in that it is fixed to a baseboard 7 forming a vertical surface with tapping screws 8, and the head 16 of a bolt 5' is locked to a seat plate 9. Furthermore, the buffer body 3' is fixed coaxially with the axis of the support shaft 2. This axis is perpendicular to the open door surface.

On the other hand, the proximal end of the hanging ring 14 is pivoted to a horizontal hole on the tip side of the support shaft 2, and the hanging ring 14 is rotated to lock the tip to the hook of the door to keep the door open at all times. In order to do this, it is necessary to firmly tighten the support shaft 2 using the nut 11. At that time, remove nut 11 from bolt 5'.
When screwed together, the seat plate 9 is tightened by applying strong pressure from both sides of the bolt head 16 and nut 11. This tightening force fixes the support shaft so that it will not rotate unexpectedly even if the support shaft receives an impact force in the axial direction of the shock absorber of the open door or the support shaft. The seat plate 9 is provided with a stepped portion 17 to form a recessed portion 18, and a bolt head 16 is inserted into this recessed portion 18.
has been set up.

(Effect) The door stop according to the present invention configured as described above can move the shock absorber on one side in a direction substantially perpendicular to the open door surface without tightening the support shaft screwed onto the anchor bolt to the seat plate or floor surface. By tightening the nut threaded onto the support shaft to the seat plate or floor while holding it by hand or with a tool, the support shaft is firmly fixed to the seat plate or floor, and the impact force of opening the door is absorbed by the shock absorber. Even if the shock absorber is applied repeatedly, it will reliably maintain a predetermined direction and will not rotate inadvertently.

By fixing the support shaft to the seat plate with a nut, the pivotable hanging ring whose base is pivoted to the support shaft, which cannot be rotated by external force, is locked to the hook of the open door. It has the effect of securely mooring the door.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the inverted L-shaped door stop installed on the floor, with a partial cutout, and Fig. 2 is a side view of the door stop shown in Fig. 1, with a part cut away to show the internal structure. Figure 3 shows the entire partially cut-out area where the support shaft and shock absorber are fixed in a straight line to bolts installed on the wall through the seat plate, and a doorstop with a hanging ring attached to the support shaft is tightened and fixed. FIG. 1, 6... Door stop, 2... Support shaft, 3, 3'... Buffer,
5...Anchor bolt, 9...Seat plate, 14...Kake ring, 17
...Natsuto.

Claims (1)

[Scope of Claims] 1. An anchor bolt installed in the floor, a support shaft screwed into the male thread of the anchor bolt through a shaft hole in which a female thread is carved, and the upper end of the support shaft has a horizontal direction. In a door stop with a fixed shock absorber, a nut is screwed into the male thread provided at the lower end of the support shaft, and the nut is unscrewed while holding the shock absorber in a direction perpendicular to the open door surface. A door stop that is characterized by rotating and tightening and fixing to the floor surface. 2. The shock absorber is coaxially extended and fixed from the tip of the support shaft, and the anchor bolt has its flat head locked in a through hole of a seat plate fixed to a building wall so as to protrude through the seat plate. The door stop according to claim 1, wherein the door stop is a bolt.