JPS6212777Y2 - - Google Patents

Description

[Detailed description of the invention] (Technical field) This invention is a door wheel that is attached to the lower stile of a sliding door shoji to reduce the force required to move the shoji. This invention relates to improvements to door rollers with wheels.

(Background of the idea) A door wheel is attached to the lower stile of a sliding door shoji in order to reduce the force required to move the shoji. The aim is to reduce the load applied to the wheels.
A door roller equipped with two wheels like this will be briefly explained with reference to FIGS. 1 to 3 showing an embodiment of the present invention. Circular holes 2, 2 for inserting screws to be attached to the lower stile 1 are bored in the four corners. A bifurcated outer casing 4 with an open bottom is attached to the lower surface of the mounting plate 3, and a forked outer casing 4 with an open bottom is attached to a pivot 5 provided at the center of the lower part of the outer casing 4. The center part of the inner case 6 is pivotally connected, and the wheels 8 are mounted on axles 7, 7 provided at both ends of the inner case 6.
Supports 8. Since the inner case 6 is slightly swingable about the pivot 5, when the shoji is installed in the door frame, the load is evenly applied to the two wheels 8, 8.

However, the door roller having two wheels configured as described above has conventionally had the following disadvantages. That is, when a shoji with a door roller attached to the bottom surface of the lower stile 1 is built inside the door frame, the outer edge of one of the wheels 8, 8 is connected to the rail on the top surface of the lower stile while holding the shoji slightly upward. 9, the shoji is lowered a little and the wheels 8 are placed on the rails 9 as shown in FIG. Since the center can swing slightly, when the shoji is lifted and the wheels 8, 8 cannot be held down, the inner casing 6 will swing from the horizontal position, and one wheel 8 will move from the horizontal position. A case may occur in which the state moves downward from the state shown in FIG. If one of the wheels 8 is lowered in this way, it may be necessary to lift the shoji even more when installing it into the door frame, or in extreme cases, the top surface of the upper stile may become lower than the bottom surface of the upper stile. Even if the shoji is lifted all the way until it collides, the outer edges of the wheels will not be able to pass over the rails, making it impossible to perform the installation work.

In order to eliminate this inconvenience, the Utility Model 58-25471
The publication describes a door roller in which the height of two wheels does not change due to the elasticity of a spring unless an external force is applied. In the case of the conventional door roller described in this publication, the wheels of the door roller do not get in the way when the shoji is set up, but the following problems still occur.

In other words, in the case of shoji made of metal sash,
When closing, press the interior side of the stile surrounding the shoji against the packing attached to the sash frame side,
Efforts are being made to maintain airtightness and sound insulation between the indoor and outdoor spaces, but if the interior side of the stile remains in contact with the packing, the force required to open and close the shoji will only increase unnecessarily. This will shorten the life of the packing, so move the shoji in parallel toward the indoor side only when closing, and when opening and closing, make sure that the indoor side of the stile that surrounds the shoji does not come into sliding contact with the packing. It is common practice to do something like this.

In this case, when the shoji is moved parallel to the indoor side only when closing, except for the structure in which a part of the lower rail on which the door roller is placed is deformed toward the indoor side, Relative displacement between the rail and the door roller is unavoidable, and when such a relative displacement occurs between the lower rail and the door roller, in the door roller described in the above publication, the outer peripheral surface of the wheel The above displacement can be absorbed within the range in which the lower rail can move inside the formed groove, or by riding the lower rail on the wall that partitions both sides of the groove, so the indoor side at the time of closing. It is unavoidable that the pulling force will be insufficient, or that the force required to pull it will become unnecessarily large.

(Purpose of the present invention) In order to solve the above-mentioned inconveniences, the present invention
Even if both wheels float up, the inner casing that supports the wheels will not swing freely, making it easier to install the shoji, and making it easier to install the shoji on the indoor side when the shoji is closed. The object of the present invention is to provide a door roller that can reliably move in parallel with a light force.

(Structure of the present invention) The door roller of the present invention has a pair of L-shaped folding pieces facing each other formed on the lower surface, and a bifurcation with an open bottom on the lower surface of the mounting plate fixed to the lower surface of the lower stile of the shoji. A shaped outer casing is supported by sandwiching the outdoor end of the upper plate portion constituting the outer casing between the pair of folded pieces, and the outdoor hanging wall and the mounting plate constituting the outer casing. A leaf spring that is stretched between the outside end of the outer casing gives elasticity to the outer casing in the direction of bringing the upper surface of the upper plate part and the lower surface of the mounting plate into contact with each other. Similarly, an inner casing with a fork-shaped opening at the bottom and supporting two wheels at both ends of the lower part is swingably supported by a pivot passing through the center of the inner casing, and the upper plate part of the inner casing is An arc-shaped leaf spring is installed between the top surface and the lower surface of the upper plate of the outer casing, and both ends of this leaf spring touch the upper surface of both ends of the upper plate of the inner casing, or both ends of the upper plate of the outer casing. It consists of compressing the lower surface with the same force.

(Operation of the present invention) Since the door roller of the present invention is constructed as described above, even when both wheels are floating, both ends of the upper surface of the inner casing or both ends of the lower surface of the outer casing are pressed downward with the same force. , this inner casing will not tilt and one wheel will not hang down. In addition, the inner casing can swing against the elasticity of the leaf springs when an external force is applied, so after the shoji is installed in the door frame, the shoji can be moved with both wheels resting on the rails. , the outer peripheral surfaces of both wheels and the top surface of the rail are in even contact.

When the shoji is moved to the closed state and the frames that make up the shoji are moved in parallel toward the indoor side, the outer casing rotates slightly toward the outdoor side with respect to the mounting plate around the support section formed by the folded stand pieces. It functions to absorb the above-mentioned parallel movement and to sufficiently move the lower stile indoors in parallel with a light force while the wheels constituting the door roller remain on the lower rail.

(Embodiments of the present invention) Next, the present invention will be explained in more detail while explaining the illustrated embodiments.

Figures 4 and 5 show a mounting plate 3 for mounting the door roller on the lower surface of the lower stile. This mounting plate 3 is made of a metal plate material, and has circular holes 2, 2 drilled at the four corners for insertion of mounting screws, and a rectangular through hole 10 bored at one corner of the center. There is. Further, near both ends of the lower surface of the mounting plate 3, L-shaped folding pieces 11, 11 facing each other are formed, and between the upper edge of the folding pieces 11, 11 and the lower surface of the mounting plate 3. A gap 12, 12 with a height h is provided between the two.

Next, FIGS. 6 to 8 show the outer casing 4 attached to the lower surface of the mounting plate 3. This outer casing 4 has a pair of hanging walls 14 and 15 bent downward at right angles on both side edges of the upper plate portion 13 that are in close contact with the lower surface of the mounting plate 3.
By providing this, it is formed into a bifurcated shape with an open bottom. At positions facing each other at the lower center of each of the hanging walls 14 and 15 are circular holes 16 and 1 for inserting a pivot shaft 5 (FIGS. 1 and 3) for an inner casing pivot, which will be described later.
6, and bent edges 14a, 15a bent outward at right angles are formed at the lower ends of each of the hanging walls 14, 15, respectively. Furthermore, by providing an inclined surface part in the middle of one of the hanging walls 15,
The interval between both hanging walls 14 and 15 is such that the lower part where the circular holes 16 and 16 are bored is narrower than the upper part near the upper plate part 13. Further, in the center of the lower end of one of the hanging walls 15 provided with the above-mentioned inclined surface portion, a through hole 17 is bored which partially reaches the folded edge 15a. Rectangular protrusions 18, 18 are formed on both end edges of the upper plate portion 13 toward the one hanging wall 15. The distance d between the outer edges of the protrusions 18, 18 and the inner surface of one of the hanging walls 15 is approximately the same as the thickness t of the folding pieces 11, 11 on the lower surface of the mounting plate described above (d≒
t). Further, the thickness T of the upper plate portion 13 on which the protrusions 18, 18 are formed is approximately the same as the height h of the gap 12 between the lower surface of the mounting plate 3 and the upper edge of the folding piece 11 (T≒h ).

9 and 10 show a leaf spring 19 for preventing the above-mentioned mounting plate 3 and outer casing 4 from being separated after they are engaged. This leaf spring 19
is bent so as to be able to lock onto the outer surface of one of the hanging walls 15 of the outer casing 4, and has a protruding piece 20 on the upper edge that can freely enter the through hole 10 in the center of the mounting plate.
A protruding piece 21 is formed on the lower edge of the outer casing 4 so as to be able to enter the through hole 17 at the lower end of one of the hanging walls 15, and a lower flat plate part is formed with a protruding piece 21 that can be inserted into the circular hole 16 at the lower end of the hanging wall 15 of the outer casing 4. A circular hole 22 is provided through which the pivot shaft 5 (FIGS. 1 and 3) can be inserted.

Also, Figures 11 and 12 show two wheels 8, 8 (first
~See Figure 3. Omitted in Figures 11-12. ) is shown. This inner cabinet 6
A pair of hanging walls 24, 24 of the same shape and size and parallel to each other are formed on both side edges of the upper plate part 23,
An axle 7 (first to third
Figure) Circular holes 26, 26 for insertion are bored respectively. Further, folded pieces 27, 27 are formed at both end edges of the upper plate portion 23, and are bent upward.

The door roller of the present invention includes each of the above-mentioned members from the first to
It is assembled and constructed as shown in FIG. 3, but during this assembly, a circle as shown in FIG. An arc-shaped leaf spring 28 is attached. A small hole 29 is bored in the center of the leaf spring 28.
9, the lower center part of the top plate part 13 of the outer casing 4 or the inner casing 6
A protruding pin or rivet (not shown) is inserted into the center of the upper surface of the top plate 23 of the leaf spring 2.
8 is prevented from sliding against the lower surface of the top plate portion 13 or the upper surface of the top plate portion 23. For this reason,
For example, when the leaf spring 28 is installed with its concave surface facing downward as in the illustrated example, the hanging walls 14, 1 of the outer casing 4
5 and the hanging wall 2 of the inner casing 6.
4, 24 in the lower center circular holes 26, 26 and the pivot 5
is inserted, and the inner case 5 is swingably attached to the outer case 4, and the upper surfaces of both ends of the top plate portion 23 of the inner case 5 are pressed downward with the same force. Therefore, when the inner case 6 swings slightly from the horizontal state as shown in FIG.
The downward pressure by the leaf spring 28 increases on the side where the plate spring 28 is raised, and decreases on the side where the plate spring 28 is lowered, so that unless an external force is applied, the inner casing 6 is restored to a horizontal state, and the axle supported at the bottom of both ends of the inner casing 6 8, 8 will not droop more than the other. The same holds true even when the leaf spring 28 is mounted with its concave surface facing upward, contrary to the illustrated example.

The attachment plate 3 and the outer casing 4 are joined together as follows. That is, first, the wide upper part of one hanging wall 15 of the outer casing 4 is inserted into the gap 12, 12 between the lower surface of the mounting plate 3 and the upper edge of the folding piece 11, and then the upper part of the upper plate part 13 is inserted. Gaps 12, 12 at the corners
1 and 2, and the outer surfaces of the folding pieces 11, 11 are brought into contact with the upper inner surface of the hanging wall 15, as shown in FIGS. In this state, the outer edges of the protrusions 18, 18 formed at both ends of the upper plate part 13 come into contact with the inner surfaces of the bases of the folding pieces 11, 11, and the upper surface of the upper plate part 13 and the lower surface of the mounting plate 3 contact. become close. Next, one hanging wall 15 of the outer casing 4 is fixed in advance by the pivot 5.
The protruding piece 2 at the upper end of the leaf spring 19 fixed to the outer surface of the
0 into the central through hole 10 of the mounting plate 3, and this leaf spring 1
If the upper part of the wheel 9 is inserted in an elastically compressed state, and the leaf spring 19 is stretched between the lower surface of the mounting plate 3 and the outer surface of the hanging wall 15, the wheels 8, The outer casing 4 does not hang down from the mounting plate 3 even before the rail 8 gets on the rail 9.
The protruding piece 21 at the lower end of the leaf spring 19 engages with the through hole 17 at the lower end of the hanging wall 15 to prevent the leaf spring 19 from rotating before the upper end protruding piece 20 engages with the through hole 10. prevent. After the wheels 8, 8 are placed on the rails 9, the weight of the shoji applies a force in the direction in which the upper surface of the upper plate part 13 and the lower surface of the mounting plate 3 come into contact with each other, so that the mounting plate 3 and the outer casing 4 are never separated. Note that the folded pieces 27, 27 formed at both ends of the upper plate portion 23 of the inner wall 6 are designed to prevent the inner case 6 from swinging significantly and to prevent the leaf spring 28 provided between the inner case 6 and the outer case 4 from being forced. This is to prevent force from being applied, but it is unnecessary after the shoji is installed, so it can be omitted.

When the shoji is moved to the closed state, each stile that makes up the shoji is moved in parallel toward the indoor side, and the lower stile 1 with the door roller is moved parallel to the right in Fig. 2, the outer stile that makes up the door roller is While elastically deforming the leaf spring 19, the housing 4 rotates slightly clockwise in FIG. Absorb movement.

Therefore, the lower stile 1 is moved sufficiently parallel to the indoor side with a light force while the wheels 8, 8 constituting the door roller remain on the lower rail 9.

(Effects of the present invention) Since the door roller of the present invention is constructed and operates as described above, the inner casing supporting the two door rollers will not swing unless an external force is applied, and one door roller will not move as much as the other door roller. It will not hang down more than the door roller and make it difficult to install the shoji.

In addition, when the shoji is moved in parallel toward the indoor side when the shoji is closed, this parallel movement is absorbed by the relative displacement between the parts that make up the door roller, so the parallelism of the lower stile when the shoji is closed is Movement can be performed reliably with light force.

[Brief explanation of the drawing]

The drawings all show embodiments of the present invention.
The figure is a side view of the assembled door roller, Figure 2 is a view seen from the right side of Figure 1, Figure 3 is a bottom view similarly seen from below, and Figures 4 and 5 show the mounting plate. Fourth
The figure is a side view, Figure 5 is a bottom view, Figures 6 to 8 are the outer casing, Figure 6 is a side view, Figure 7 is a plan view, and Figure 8 is from the right side of Figure 6. Views, Parts 9-1
Figure 0 shows a leaf spring for connecting the mounting plate and the outer casing, Figure 9 is a side view, Figure 10 is a view from the right side of Figure 9, and Figures 11 and 12 are internal views. 11 is a side view, FIG. 12 is a side view of FIG. 11, and FIG. 13 is an exploded perspective view of the door roller with some parts omitted. 1: Lower stile, 2: Round hole, 3: Mounting plate, 4: Outer casing,
5: Pivot, 6: Inner case, 7: Axle, 8: Wheel, 9:
Rail, 10: Through hole, 11: Folded piece, 12: Gap, 13: Upper plate, 14, 15: Hanging wall, 14
a, 15a: bent edge, 16: circular hole, 17: through hole,
18: protrusion, 19: plate spring, 20, 21: protrusion piece, 22: circular hole, 23: upper plate, 24: hanging wall,
25, 26: circular hole, 27: folded piece, 28: plate spring, 29: small hole.

Claims (1)

[Scope of utility model registration request] A pair of L-shaped folding pieces facing each other are formed on the lower surface, and a fork-shaped outer casing with an open bottom is formed on the lower surface of the mounting plate fixed to the lower surface of the lower stile of the shoji. The outdoor end of the upper plate part is supported by being sandwiched between the pair of folded pieces, and is also stretched between the outdoor hanging wall that constitutes the outer casing and the outdoor end of the mounting plate. The leaf spring imparts elasticity to the outer casing in the direction of bringing the upper surface of the upper plate part and the lower surface of the mounting plate into contact with each other, and a lower part is provided inside the outer casing in a bifurcated shape with an open bottom like the outer casing. An inner casing supporting two wheels at both ends is swingably supported by a pivot passing through the center of the inner casing, and the upper surface of both ends of the upper plate of the inner casing and the lower surface of the upper plate of the outer casing are connected to each other. A door roller in which an arc-shaped leaf spring is installed between the parts, and both ends of the leaf spring press against the upper surface of both ends of the upper plate part of the inner casing or the lower surface of both ends of the upper plate part of the outer casing with the same force.