JP2000291321A - Sash roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sash roller adjustable in height with easier than conventional sash rollers even if a door is left standing. SOLUTION: In a sash roller, a screw shaft 5 is screwed to a horizontal moving member 7, and both ends of the screw shaft 5 are fitted loose to the side walls of a case 3. Therefore, even if the horizontal moving member 7 is pushed up enough to abut on the case 3, the relative position relation between the horizontal moving member 7 and the screw shaft 5 does not change. Therefore, the rotation center of the screw shaft 5 does not incline in relation to the screw hole of the horizontal moving member 7. Therefore, in this sash roller, when the height of the sash roller is adjusted, even if the screw shaft 5 is adjusted while leaving a sliding door standing after attaching the sash roller to the sliding door, since excessive force is not applied to the outer face of the screw shaft 5 and the screw groove in the inner face of the screw hole of the horizontal moving member 7, excessive force is not needed in operating the shrew shaft 5, which makes it possible to prevent the damage of the screw groove.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a door car.

[0002]

2. Description of the Related Art Conventionally, as a door wheel which can be adjusted in height after being attached to a door, for example, those described in Japanese Utility Model Laid-Open Publication No. 3-47976 and Japanese Utility Model Publication No. 5-530 are known. In all of these door wheels, a wedge-shaped horizontal moving member is inserted between an upper structure fixed to the door and a lower structure including a rolling element that rolls with the movement of the door. A mechanism that adjusts the distance between the upper structure and the lower structure according to the insertion depth is adopted.

[0003]

However, it is difficult to adjust the height of the door roller described in each of the above publications with the door standing, so that the height of the door roller is usually removed after removing the door. There is a problem that it is necessary to repeat the work of performing adjustment, standing up the door, and checking the state of the adjustment, and the adjustment work is troublesome.

More specifically, the above-mentioned Japanese Utility Model Application Laid-Open No. 3-4 is described.
The door wheel described in No. 7976 has a structure in which the adjustment block, which is the horizontal moving member, is fixed at any one of predetermined specific places.
With the door standing up, it was difficult to slide the adjustment block accurately to an appropriate position where it can be fixed.

[0005] Further, in the door roller described in Japanese Utility Model Publication No. 5-530, the adjusting slider as the horizontal moving member is supported like a cantilever by one adjusting screw. If there is a gap between the upper surface and the case ceiling due to assembly accuracy or wear or deformation, the load acting on the door puller when the door is raised will push up the adjustment slider in the direction to narrow the gap with the case. The rotation center of the adjusting screw is inclined with respect to the screw hole. For this reason, it is necessary to operate the adjustment screw with the center of rotation inclined with respect to the screw hole while the door is upright, and the adjustment screw requires considerable force to operate. When the adjusting screw is turned, the adjusting screw and the screw groove of the screw hole may be crushed.

Of course, if a material that does not cause abrasion or deformation is selected, and each part is processed with considerably high dimensional accuracy, and the assembly accuracy is also considerably increased, the height between the adjustment slider upper surface and the case ceiling surface can be increased. Although it may not be impossible to obtain a door wheel that has no gap and the center of rotation of the adjustment screw can maintain the designed position, such a door wheel has the problem of significantly increasing manufacturing costs. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide a door car which can easily adjust the height even if the door is kept upright.

[0008]

Means for Solving the Problems and Effects of the Invention In order to achieve the above-mentioned object, a door roller according to claim 1 has a case having a pair of side walls opposed to each other at intervals, and both side walls of the case. It is hung horizontally between them, and each end is loosely fitted to each side wall of the case and does not fall off from each side wall, and is rotatable around an axis connecting the both ends, and the outer peripheral surface On the lower surface side, a screw shaft having a thread groove formed therein, and an inclined portion having a vertical position displaced downward as the horizontal position is displaced from one end to the other end of the screw shaft. And is screwed to the screw shaft between the side walls of the case, and when the screw shaft is rotated, it is sent to the screw groove of the screw shaft and relatively to the case in the horizontal direction. A moving member that moves in a direction perpendicular to the case. A movable portion is formed on the upper surface side, and has an inclination the same as the inclined portion of the horizontal moving member, and the inclined portion contacts the inclined portion of the horizontal moving member with the inclined portion to move the horizontal moving member. A vertical moving member supported from below, and a rolling member provided at a lower end side of the vertical moving member and having a rolling element that rolls when moving on a traveling path are provided.

In this door roller, the case has at least the pair of side walls, but it is a matter of course that the case may have an attachment portion to the door and other structures.
The screw shaft has a structure in which each end does not fall off from each side wall, but the specific structure is arbitrary. For example, if both ends of the screw shaft are passed through through holes formed in both side walls of the case, a flange or a head larger than the inner diameter of the through hole is provided at both ends of the screw shaft. A structure in which a part or a head is hooked on each outer surface side of both side walls or a structure in which a similar flange is hooked on each inner surface side of both side walls can prevent each end portion from falling off. Further, if one end of the screw shaft is passed through a through hole formed on one side wall of the case and the other end of the screw shaft is fitted into a concave portion formed on the other side wall of the case, A flange similar to that described above may be provided only at one end of the screw shaft, and the flange may be hooked on the inner surface of the side wall having the through hole.

[0010] The inclined portion of the horizontal moving member is formed on the lower surface side of the horizontal moving member, but the lower surface side here is a range that can be seen from directly below the horizontal moving member.
Depending on the shape of the horizontal moving member, the inclined portion does not always form the lower end of the horizontal moving member. Similarly, the inclined portion of the vertical moving member is formed on the upper surface side of the vertical moving member, but the upper surface side here is a range that can be seen from directly above the vertical moving member, Depending on the shape, the inclined portion does not always form the upper end of the vertical moving member.

According to the door wheel constructed as described above, the height of the door wheel can be adjusted steplessly by rotating the screw shaft to move the horizontal moving member in the horizontal direction. In particular, in this door wheel, the screw shaft is screwed into the horizontal moving member, and both ends of the screw shaft are loosely fitted to the side wall of the case, so that the horizontal moving member is pushed up to a position where it comes into contact with the case. However, the relative positional relationship between the horizontal moving member and the screw shaft does not change, and the rotation center of the screw shaft does not tilt with respect to the screw hole of the horizontal moving member. Therefore,
According to this door roller, when adjusting the height of the door roller, even if the screw shaft is operated while the door is upright after being attached to the door, no excessive force is applied to the screw shaft or the screw groove of the screw hole. Therefore, no excessive force is required to operate the screw shaft, and damage to the screw shaft and the screw hole can be prevented.

According to a second aspect of the present invention, the rolling element is supported so as to be able to roll about a horizontal axis and to be rotatable about a vertical axis. ,
The two axes are located at the same plane.

According to this door roller, the rolling elements not only roll about a horizontal axis, but also rotate about a vertical axis. In particular, since the position of the two axes is a position where the two axes are in the same plane, the rolling element is rotated around the vertical axis without displacing the lower end position of the rolling element with respect to the door. Thus, the rolling direction of the rolling element can be changed.

Therefore, according to this door wheel, not only is the door opened and closed along a straight traveling path, but also the door is opened and closed along a curved or curved straight traveling path. However, since the rolling element always keeps the state of rolling smoothly while changing the direction appropriately, the door can be smoothly opened and closed.

Further, in the door roller according to the third aspect, the inclined portion of the vertical moving member is formed by end faces of a pair of plate-like bodies arranged at intervals larger than the outer diameter of the screw shaft. When the vertical movement member is relatively displaced upward, the vertical movement member can be displaced to a position above the screw shaft while receiving the screw shaft between the pair of plate members.

According to this door roller, when the vertical moving member is relatively displaced upward, the vertically movable member is displaced to a position higher than the screw shaft while receiving the screw shaft between the pair of plate-shaped members. Despite being hung between the side walls,
The moving range of the vertical moving member is not restricted by the screw shaft acting as an obstacle.

Therefore, according to this door wheel, when the vertical moving member is displaced upward, the position of the screw shaft and the moving range of the vertical moving member are smaller than the structure in which the upper end of the vertical moving member abuts on the screw shaft. Due to the overlap, the vertical dimension of the door wheel can be made compact.

[0018]

Next, an embodiment of the present invention will be described with reference to an example. 1 (a), FIG. 1 (b), FIG. 2 (a), and FIG. 2 (b), the case 3, a screw shaft 5, a horizontal moving member 7, a vertical moving member 9, and A rolling element 11 and the like are provided.

The case 3 includes a plate-shaped upper horizontal portion 21a, vertical portions 21b and 21c which are bent at substantially right angles from both ends of the upper horizontal portion 21a and extend downward, and each of the vertical portions 21b and 21b.
The upper part of the first case component 21 having the lower horizontal portions 21d and 21e bent at a substantially right angle from the lower end of 21c and extending away from each other is raised by the second case component 22 and the third case component 23 on the front side and the rear side. From the second
Screw the case component 22 and the third case component 23
It has a fixed structure. The screw 24 is provided on the right side similarly to the illustrated left side.

The screw shaft 5 has a thread groove formed on the outer peripheral surface thereof. The screw shaft 5 is horizontally stretched between both side walls of the case 3, and each end on both sides is formed on each side wall of the case 3. It is loosely fitted in the through hole. A head 5 a is formed at one end of the screw shaft 5, and a stopper 25 is fixed to the other end of the screw shaft 5. The structure does not fall off. The screw shaft 5 is freely rotatable about an axis connecting both ends.

The horizontal moving member 7 is screwed to the screw shaft 5 between the side walls of the case 3. When the screw shaft 5 is rotated, the horizontal moving member 7 is sent to the screw groove of the screw shaft 5 and moves in the horizontal direction with respect to the case 3. Move relatively. On the lower surface side of the horizontal moving member 7, the more the horizontal position is displaced from one end side (the left end side in FIG. 2A) of the screw shaft 5 to the other end side (the right end side in FIG. 2A). An inclined portion 7a having an inclination in which the position in the vertical direction is displaced downward is formed.

The vertical moving member 9 has a rolling element holding member 31 attached to the lower end side of a vertical shaft 29 fixed to the upper metal fitting 27 via a ball bearing, so that the rolling element holding member 31 can move a vertical axis. It is configured to rotate freely around the center. In the vertical moving member 9, the upper surface of the upper fitting 27 forms an inclined portion 9 a having the same inclination as the inclined portion 7 a of the horizontal moving member 7, and the inclined portion 9 a contacts the inclined portion 7 a of the horizontal moving member 7. In contact therewith, the horizontal moving member 7 is supported from below. The vertical moving member 9 has a connecting shaft 33 protruding to the front side and the back side, and the connecting shaft 33 loosely fits into the long holes 22 a and 23 a formed on the front side and the back side of the case 3. ing. The moving direction and the moving range of the vertical moving member 9 are regulated by the connecting shaft 33, and the vertical moving member 9 is vertically moved with respect to the case 3 as shown in FIGS. 2 (a) and 2 (b). Relatively move in the direction. The upper bracket 27 is, as shown in FIG.
It has a shape having a pair of plate-like members 27a arranged at an interval wider than the outer diameter of the screw shaft 5, and the inclined portion 9a of the vertical moving member 9 is formed by an end face of the plate-like member 27a. When the vertical moving member 9 is relatively displaced upward with respect to the case 3, as shown in FIG. 2A, the vertical moving member 9 receives the screw shaft 5 between the pair of plate-like bodies 27a, and The upper end of the moving member 9 (that is, the upper end of the upper fitting 27) can be displaced above the screw shaft 5.

The rolling element 11 is attached via a ball bearing to a horizontal shaft 35 fixed to a rolling element holding member 31 at the lower end side of the vertical moving member 9 and freely rotates about a horizontal axis. It is configured as follows. As described above, the rolling element holding member 31 freely rotates around the vertical axis, so that the rolling element 11 can roll around the horizontal axis and can rotate around the vertical axis. It will be. In this door roller 1, the rolling elements 11
The positions of the two axes that are the centers of rotation of are the positions where both axes are in the same plane.

The door wheel 1 constructed as described above is mounted on the lower part of the door D using flat head screws 37 as shown in FIG. Then, the height can be adjusted by rotating the screw shaft 5 using the tool T. More specifically, when the screw shaft 5 is rotated, as shown in FIG. 2A and FIG.
Is moved to the horizontal direction by being sent to the screw groove. When the horizontal moving member 7 moves in the direction shown in FIG. 2A, the vertical moving member 9 is relatively displaced upward with respect to the case 3, so that the rolling element 11 that is in contact with the ground is used as a reference. Then, the case 3 fixed to the door D is lowered together with the door D. When the horizontal moving member 7 moves in the direction shown in FIG. 2B, the vertical moving member 9 is relatively displaced downward with respect to the case 3, so that the rolling elements 11 Case 3 fixed to door D based on
Rises with the door D.

In the state where the load of the door is applied to the door roller 1, the horizontal moving member 7 is strongly sandwiched between the vertical moving member 9 and the case 3, but both ends of the screw shaft 5 play on the side wall of the case 3. Since they are fitted, the relative positional relationship between the horizontal moving member 7 and the screw shaft 5 does not change, and the rotation center of the screw shaft 5 does not tilt with respect to the screw hole of the horizontal moving member 7.

Therefore, according to the door roller 1, even if the screw shaft 5 is operated with the door D standing after the door shaft D is attached to the door D, the screw on the outer surface of the screw shaft 5 and the inner surface of the screw hole of the horizontal moving member 7 is formed. No excessive force is applied to the groove, and no excessive force is required to operate the screw shaft 5. In addition, the door roller 1 is a rolling element 1
1 rotates not only about a horizontal axis but also about a vertical axis. In particular, since the positions of both axes are in the same plane, the lower end position of the rolling element 11 The rolling direction of the rolling element can be changed by rotating the rolling element about a vertical axis without displacing the door.

Therefore, according to the door wheel 1, the door D is opened and closed not only when the door D is opened and closed along a straight traveling path but also along a curved or bent straight traveling path. Even in this case, since the rolling element 11 always keeps a state of smoothly rolling while changing the direction, the door D can be smoothly opened and closed.

Further, since the upper end of the vertical moving member 9 is displaced above the screw shaft 5, the door wheel 1 is limited by the overlap of the position of the screw shaft 5 and the moving range of the vertical moving member 9. Can be made compact in the vertical direction. As described above, the embodiments of the present invention have been described. However, the present invention can be implemented in modes other than the above, and is not limited to the above specific modes.

For example, in the above embodiment, the case 3 is composed of three parts, and these are assembled and fixed with screws. However, a joining method that does not use screws, such as a method using welding or an adhesive. May be adopted.
Further, although not explicitly described in the above embodiment, the door roller of the present invention moves smoothly even if it moves so as to draw a trajectory other than a straight line, so that not only the lower end side of the sliding door, It can also be attached to the lower end of a hinged or revolving door. Since a hinged door and a revolving door are supported by a pivot, a door wheel is not necessarily required.However, if a door wheel is provided, the load of the hinged door and the revolving door will be distributed to both the pivot and the door wheel, There is an effect that such a load is reduced.

When it is inconvenient to provide rails on the floor or sill, a hanging door having a support structure on the ceiling or on the door may be used, and the door wheel of the present invention is attached to the lower end of the hanging door. You can also. If a door wheel is provided at the lower end of the hanging door, the load on the support structure on the Kamoi side is reduced, and the structure of the Kamoi and the frame supporting the Kamoi does not need to be excessively high in strength. This has the effect of increasing the degree of freedom of design and simplifying the structure.

Further, in the above embodiment, the rolling element 1
1 shows a cylindrical member, but the rolling element 1 is formed by chamfering a ridge line at the boundary between the bottom surface and the side surface of the cylinder.
The specific shape of 1 may be appropriately changed. Further, a structure may be employed in which a spherical rolling element is used and the rolling element itself can roll in an arbitrary direction.

[Brief description of the drawings]

FIG. 1 is a diagram of a door roller exemplified as an embodiment of the present invention, where (a) is a left side view thereof and (b) is a front view thereof.

FIGS. 2A and 2B are views in which parts on the front side of the door roller have been removed so that the internal structure can be seen; FIG. 2A is a front view showing a state in which a case is lowered with respect to a rolling element; FIG. 7 is a front view showing a state in which the case is raised with respect to FIG.

FIG. 3 is a sectional view taken along line AA of the door roller.

FIG. 4 is a view showing a state in which the door roller is attached to a door.

[Explanation of symbols]

1 ... door car, 3 ... case, 5 ... screw shaft, 7
..Horizontal moving member, 9 ... Vertical moving member, 11 ...
Rolling element, 21: first case component, 22: second case component, 23: third case component, 24: screw, 25: stopper, 27: upper bracket, 27
a: plate-like body, 29: vertical axis, 31: rolling element holding member, 33: connecting axis, 35: horizontal axis.

Claims (3)

[Claims] 1. A case having a pair of side walls opposed to each other with a space therebetween, and is horizontally hung between both side walls of the case. The screw shaft is rotatable about an axis connecting both ends thereof, and has a screw groove formed on an outer peripheral surface thereof. An inclined portion having an inclination in which the vertical position is displaced downward as it is displaced toward the end side is formed on the lower surface side, and is screwed to the screw shaft between the side walls of the case, and the screw shaft is A horizontal moving member that is sent to a screw groove of the screw shaft and relatively moves in a horizontal direction with respect to the case when rotated; and a horizontally movable member that is relatively movable in a vertical direction with respect to the case. An inclined part with the same inclination as that of the A vertical moving member which abuts the inclined portion of the horizontal moving member at the inclined portion to support the horizontal moving member from below, and which is provided at a lower end side of the vertical moving member and moves on a traveling route. And a rolling element that rolls on the door. 2. The rolling element is supported so as to be rotatable about a horizontal axis and rotatable about a vertical axis, and the positions of the two axes are such that the two axes are in the same plane. The door roller according to claim 1, wherein the door roller is located at a come position. 3. An inclined portion of the vertical moving member is formed by end faces of a pair of plate-like members arranged at a distance larger than an outer diameter of the screw shaft, and the vertical moving member moves upward. 3. The device according to claim 1, wherein when relatively displaced, the screw shaft can be displaced to a position higher than the screw shaft while receiving the screw shaft between the pair of plate-shaped members. Door car.