JPH0115820Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a height adjustment structure for a door roller attached to the bottom of a door such as a storm door.

[Problems to be solved by the prior art and the invention] Generally, in door rollers of this type that are attached to the bottom of the lower stile, as shown in FIG. The inner frame 1' on which the vehicle body 2' is rotatably supported is fitted so as to be slidable up and down, and the inner frame 1' is moved forward and backward by the adjustment screw 7' screwed onto the upper part of the indoor side of the outer frame 3'. Some devices allow height adjustment on the indoor side by dynamic pressure. In this case, the upper surface of the outer frame 3', which is the mounting surface for the door plate, must be made as wide as possible, and the adjustment screw 7'
Considering the operability, it is desirable to tilt the adjustment screw 7' as much as possible as shown in Fig. 4.
In this case, the tip of the adjustment screw 7' will receive a large force f in the radial direction.
Deformation of the adjustment screw 7', damage to the adjustment screw threaded part 4',
Furthermore, problems such as the difficulty of advancing and retracting the adjustment screw 7' may occur. Therefore, as shown in FIG. 1, a lever plate 5 is protruded from the outer frame so as to abut the adjustment screw 7 from below. It has been proposed to solve the above-mentioned problems by configuring the frame 1 to slide up and down with respect to the outer frame 3. However, in this case, the amount of vertical movement of the inner frame 1 relative to the amount of forward and backward movement of the adjustment screw 7 increases as the lever plate 5 is positioned on the upper side and approaches the horizontal position. There is still a problem in that it is heavy.

[Means for solving the problem] In view of the above-mentioned circumstances, the present invention was devised for the purpose of providing a height adjustment structure for a door roller that can eliminate these drawbacks. The door roller is constructed by fitting an inner frame, on which the vehicle body is rotatably supported, into an outer frame attached to the bottom side so as to be slidable up and down, so that the inner frame can be moved up and down in the upper part of the indoor side of the outer frame. The height adjustment screw is screwed into the upper portion of the outdoor side of the outer frame, and the tip extends downward to the adjustment screw and protrudes in an inclined manner so as to come into contact with it. A lever plate is provided that swings up and down using a protruding base from the inner frame as a fulcrum, and a plurality of protrusions are provided on the lower surface of the lever plate for adjusting the height by contacting the upper surface of the inner frame, and the amount of protrusion of these plurality of protrusions is is characterized in that in the process of downward displacement of the inner frame with respect to the outer frame based on the swinging of the lever plate, the part that contacts the inner frame is set to sequentially change from the protrusion on the fulcrum side to the protrusion on the tip side. It is something to do.

With this configuration, the present invention allows the lever plate to be provided between the inner frame and the adjustment screw, but the adjustment screw can be moved forward and backward smoothly with a light operating force regardless of the position of the lever plate. It has been made possible to do so.

[Example] Next, an example of the present invention will be described based on FIG. 2 of the drawing. In the drawings, reference numeral 1 denotes an inner frame with an open bottom surface, and a vehicle body 2 is attached to the inner frame 1.
is rotatably supported. 3 is inner frame 1
The inner frame 1 is fitted into the inner frame 1 so as to be able to slide up and down, but the threaded part 4 in which the nut at the upper part of the outer frame 3 on the indoor side is installed has an adjustment part that tilts toward the indoor side. A screw 7 is inserted so that it can move forward and backward in the vertical direction. On the other hand, from the upper part of the indoor side of the outer frame 3, a lever plate 5 whose tip reaches below the adjustment screw 7 and comes into contact with it is provided in an inclined manner protruding toward the indoor side. 5 is designed to be able to swing up and down using the protruding base on the outer frame 3 side as a fulcrum O. That is, the lever plate 5 has a pair of protrusions 6, 6a formed on the lower surface of its distal end portion, on the distal side and on the central portion side, and the first protrusion 6a on the central portion side is connected to the second protrusion on the distal side. 6, and at the neutral position of the height adjustment range shown by the solid line in Fig. 2, both protrusions 6,
6a will come into contact with the upper end surface of the inner frame 1, but the inner frame 1 will be lower than this neutral position.
When the first protrusion 6a contacts and supports the upper surface of the inner frame 1, the first protrusion 6a contacts and supports the upper surface of the inner frame 1. On the other hand, when the inner frame 1 is slid downward from the neutral position, When adjusted, the second protrusion 6 on the tip side instead of the first protrusion 6a contacts and supports the upper surface of the inner frame 1. Note that 8 is a door plate mounting surface on the upper part of the outer frame 3 where the lower end of the door plate is located.

In the embodiment of the present invention constructed as described above, in order to adjust the height of the door roller, the inclined adjustment screw 7 is moved forward and backward from the indoor side. The upper surface of the lever plate 5 is pressed and converted into a rocking motion with the outdoor base end of the lever plate 5 as the fulcrum O, and based on this, the protrusion 6 or 6a of the lever plate 5 contacts the upper surface of the inner frame 1 downward. By applying this pressure, the inner frame 1 is vertically displaced relative to the outer frame 3, thereby adjusting the height of the door roller.

As described above, in the present invention, the forward and backward movement of the adjustment screw 7 is converted into the swinging movement of the lever plate 5, and based on this, the inner frame 1 is vertically displaced to adjust the height of the door roller. In this case, when adjusting the height of the inner frame 1 from the deepest fitted state to the lower side, the inner frame 1 first moves to the first protrusion 6a from the fulcrum O provided on the lever plate 5. Therefore, it is adjusted in a state where it is brought into contact and pressed, and after passing through the neutral position, it is brought into contact and pressed by the second projection 6 on the tip side instead of the first projection 6a. Therefore, when the lever plate 5 is located above the neutral position, the amount of vertical movement of the inner frame 1 relative to the amount of forward and backward movement of the adjustment screw 7 can be reduced, and the operating force for the adjustment screw 7 can be reduced accordingly. can do. As a result, the adjusting screw 7 can be moved forward and backward smoothly at all times with a light operating force regardless of the position of the lever plate 5, and the workability in adjusting the height of the door roller can be significantly improved.

[Operation and Effect] In summary, since the present invention is constructed as described above, a lever plate is provided between the inner frame and the adjustment screw, and the vertical swing of the lever plate as the adjustment screw advances and retreats. Although the height of the door roller is adjusted, the multiple protrusions provided to contact the inner frame of the lever plate adjust the amount of swing of the lever plate in the process of downward displacement of the inner frame relative to the outer frame. The inner frame is contacted and pressed in order from the one on the fulcrum side, which has a smaller amount of vertical movement, to the one on the tip side, which has a larger amount of vertical movement. Therefore, even in a state where the lever plate is located at an upper position close to a horizontal position and the amount of vertical movement is large, the amount of vertical movement of the inner frame relative to the amount of forward and backward movement of the adjustment screw can be reduced, and as a result, The forward and backward movement of the adjustment screw can always be performed smoothly with a light operating force regardless of the position of the lever plate.

[Brief explanation of drawings]

The drawings show an example of the height adjustment structure for the door roller according to the present invention, and FIG. 1 is a longitudinal cross-sectional view of the door roller before the invention was developed, and FIG. 2 is a vertical cross-sectional view of the door roller before the invention was developed. 3 and 4 are longitudinal sectional views of a conventional door roller. In the figure, 1 is an inner frame, 2 is a vehicle body, 3 is an outer frame, 4 is a threaded portion, 5 is a lever plate, 6 is a second projection, 6a is a first projection, and 7 is an adjustment screw.

Claims (1)

[Scope of utility model registration request] The door roller has an inner frame, on which the vehicle body is rotatably supported, fitted into an outer frame attached to the bottom side of the door so as to be slidable up and down, and the inner frame is slidably moved up and down in the upper part of the indoor side of the outer frame. While screwing the height adjustment screw so that A lever plate is provided that swings up and down using a protruding base from the outer frame as a fulcrum, and a plurality of protrusions are provided on the lower surface of the lever plate for height adjustment by contacting the upper surface of the inner frame. The amount of protrusion is set so that in the process of downward displacement of the inner frame with respect to the outer frame based on the swinging of the lever plate, the part that contacts the inner frame changes from the protrusion on the fulcrum side to the protrusion on the tip side sequentially. Features a height adjustment structure for the door roller.