JPS5936587Y2 - Stair tread support structure - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to the structure of the stair tread support.

Conventional staircases manufactured in a single factory had the problem that installation at the site depended on the angle, and the treads and tread installation required rework.

The present invention was made in view of the above points, and its purpose is to provide a structure for a stair tread holder that allows treads to be horizontally attached to girders without modification on site. It is in.

Hereinafter, the present invention will be explained in detail based on examples.

A is an open type staircase, with girder 1 and treads? It consists of:

A semicircular notch 2 is provided at the front edge of the girder 1.

Reference numeral 3 denotes a metal foot plate support body, which has a cylindrical shape with the same diameter as the notch 2 having a foot plate fitting groove 4 at the front.

The footboard support has fixed pieces 6 extending from both sides of the body 30 to the back.

The protruding curved surface 5 on the back surface of the body 3 of the footplate holder is fitted into the notch 2, and in the state in which the body 3 of the footplate holder is fitted, the body 3 of the footplate holder can freely rotate up and down.

Then, the body 3 of the tread plate holder is rotated and adjusted so that the tread plate fitting groove 4 becomes horizontal in accordance with the inclination angle of the spar 1, and then the fixing piece 6 is fixed to the side surface of the spar 1 with a fixing tool.

Then, the tread plate T is horizontally fitted into the tread plate fitting groove 4 and fixed.

In addition, the tread plate support is installed by inserting a handrail mullion (not shown) into the upper surface of the body 3 by providing a hole (not shown). If the mullion is recessed in the direction, the mullion can be constructed so that it is always perpendicular to the tread 1.

As mentioned above, in this invention, the tread plate holder, which is formed in a cylindrical shape and can freely rotate up and down within the semicircular notch formed at the front edge of the girder, is fitted into the tread plate along the axial direction in the front part of the body. The tread holder fits the protruding curved surface on the back side of the body into the notch of the girder, so even if the tread holder rotates the body within the notch and adjusts the angle of the tread with respect to the spar, the tread holder will not touch the body. This has the advantage that there is no gap between the footboard and the footboard, and foreign matter such as dirt can be prevented from entering between the footboard and the footboard holder.

[Brief explanation of the drawing]

Fig. 1 is a partial perspective view of the staircase of the present invention, and Fig. 2 is an enlarged perspective view of the structure of the tread holder shown above, where τ, 1 is a girder, and 2 is an exploded perspective view.
3 is a notch, 3 is a body of the tread plate, 4 is a groove for fitting the tread plate, 5 is a convex curved surface, and 6 is a fixing piece.

Claims (1)

[Scope of utility model registration request] A semicircular notch is provided at the front edge of the girder, and the tread plate holder, which is formed into a cylindrical shape and can freely rotate up and down within the notch, has a tread fitting groove formed along the axial direction in the front part of the body. A stair tread in which fixed pieces extend backward from both ends in the axial direction of the body, and the tread holder has a protruding curved surface on the back side of the body fitted into a notch in the girder, and the fixed piece is fixed to the side of the girder. Uke is a structure.