JP3489766B2 - Sliding door guidance device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding door guide device.

[0002]

2. Description of the Related Art Heretofore, the following types of sliding door guide devices have been known. That is, a large-diameter roller is provided on one of the left and right portions of the upper end of the sliding door, and a small-diameter roller is provided on the other end of the sliding door so that the shaft center is oriented vertically, and the large-diameter roller is guided by the upper guide rail. It is known that the groove is fitted in the front-rear direction without play, and the small-diameter roller is fitted in the guide groove with play in the front-rear direction (see Japanese Utility Model Publication 5-531). Since the small-diameter roller is fitted in the guide groove with play in the front-rear direction, the small-diameter roller can move freely in the guide groove even when the sliding door warps in the front-rear direction. A small diameter roller or small diameter roller does not firmly contact the side surface of the guide groove,
As a result, there is an advantage that the sliding door can be easily opened and closed.

[0003]

Disadvantages of the Prior Art The conventional sliding door guide device has the following drawbacks. That is, since the small-diameter roller was fitted in the guide groove with play in the front-rear direction, it is possible to cope with the warp of the sliding door in the front-rear direction as described above, but when the warp does not occur, the small-diameter roller is in the guide groove. There was a backlash in the front and back, and there was a drawback that it was a little trouble opening and closing the sliding door.

[0004]

[Means for Solving the Disadvantages] The present invention employs the following means in order to eliminate the above disadvantages. According to the invention of claim 1, an eccentric disc having an axial center in the vertical direction is provided at the upper end of the sliding door so as to be rotatable and fixable at a predetermined position.
The eccentric disc is adapted to fit in a guide groove opened below the upper guide rail in the front-rear direction without play.

[0005]

The invention of claim 1 has the following effects. Even if the sliding door warps in the front-rear direction, by changing the position of the eccentric disc with respect to the sliding door so that the eccentric disc does not hit the inner surface of the guide groove strongly, it is possible to open and close the sliding door smoothly. Not only that, but the eccentric disc fits into the guide groove opened below the upper guide rail without play in the front-rear direction. As a result, unlike the prior art, there is no problem in opening and closing the sliding door.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In this description, the front means the front side in FIG. 1, the rear means the back side, the left means the left side in FIG. 1, and the right means the right side in FIG.

The upper guide rail 2 and the lower guide rail 3 which are provided at the upper and lower edges of the opening 1 of the storage or the like formed in the room and whose longitudinal direction is oriented in the left-right direction are described in detail below. A pair of left and right sliding doors 5 are provided so as to be movable left and right.

As shown in FIGS. 2 and 3, the right sliding door 5
A recess 7 that opens upward is formed on the right side of the upper end of the, and a fixed shaft 8 whose axial center is oriented in the up-down direction is fitted and stopped in the recess 7. An eccentric disc 10 having an axial center in the vertical direction is rotatably provided on the fixed shaft 8 by a pivot 9 made of a bolt. The eccentric disc 10 is provided on the upper guide rail 2
It is fitted in a guide groove 12 which is opened downwardly in the front and back without any play. The fixed shaft 8 is formed with a required number of recesses 13 at predetermined angles so as to be located on a virtual arc centered on the center of the pivot 9, while the eccentric disc 10 is provided.
A through hole 14 is formed in the recess at the predetermined rotation position so as to overlap the recess 13. With such a structure, the eccentric disc 10 is rotated by rotating the eccentric disc 10 to overlap the through hole 14 with the predetermined recess 13 and then fitting the fixing pin 15 into the through hole 14 and the recess 13. Can be fixed to the fixed shaft 8 and thus to the sliding door 5. In addition,
The upper part of the sliding door 5 is fitted in the guide groove 12 with a front-rear gap.

The structure shown in FIGS. 2 and 3 is also provided on the upper left side portion of the right sliding door 5 and on the upper left and right side portions of the left sliding door 5.

As shown in FIGS. 4 and 5, the right sliding door 5
A recess 19 that opens downward is formed on the right side of the lower end of the
A door roller 20 is fitted in the recess 19 and is stopped. The door roller 20 includes a casing 21, a screw shaft 22 rotatably provided on the casing 21 with its axis oriented in the front-rear direction, and a wheel 23 screwed onto the screw shaft 22.
And a pair of front and rear lock nuts 24 screwed to the screw shaft 22 to hold and lock the wheel 23 from the front and rear. The wheel 23 has an inner member 23a and an outer member 23b rotatably fitted to the inner member 23a via a bearing. Outer member 23b of wheel 23
Is fitted in the guide groove 27 of the lower guide rail 3. With such a configuration, the front and rear lock nuts 24
The position of the wheel 23 with respect to the sliding door 5 can be changed by rotating the screw shaft 22 in a state in which the inner member 23a is clamped by the front and rear lock nuts 24. The wheels 23 can be fixed.

[0011]

Next, the operation of the embodiment of the present invention will be described. Two eccentric discs 10 and 2 of each sliding door 5
By adjusting the positions of the two wheels 23 according to the degree of warpage of the front and rear of the sliding door 5, the eccentric disc 10 is guided by the guide groove 12.
It is possible to smoothly open and close the sliding door 5 by not strongly hitting the front and rear side surfaces of the sliding door 5.

[0012]

[Modifications, etc.] Modifications will be described below. (1) The eccentric disc 10 is the guide groove 12 of the upper guide rail 2.
That the eccentric disc 10 is fitted in the guide groove 12 with a slight gap is included in the state that the eccentric disc 10 is fitted without play in the front and rear. (2) It is sufficient that at least one eccentric disc 10 is provided above the sliding door 5. When the eccentric disc 10 is one, the other one is a roller whose axial center is fitted in the guide groove 12 of the upper guide rail 2 without play or with almost no play. (3) The structure for fixing the eccentric disc 10 at a predetermined position is arbitrary, and, for example, a known ball lock mechanism (a movable ball provided on the fixed shaft 8 by a spring in a projecting bias state,
A mechanism having a recess formed in the eccentric disc 10 into which the ball fits may be used, and the eccentric disc 10 may be used.
Alternatively, the eccentric disc 10 may be fixed by screwing a lock screw whose axial center is oriented in the vertical direction and strongly pressing the lock screw against the upper end of the sliding door 5. (4) Different from the embodiment of the invention, the number of the sliding doors 5 is one, and when the sliding doors 5 are opened, the sliding doors 5 are configured to fit in a door pocket or the like. May be provided.

[0013]

The present invention has the following effects due to the above-described structure. According to the invention of claim 1, the position of the eccentric disc relative to the sliding door is changed so that the eccentric disc does not strongly hit the inner surface of the guide groove even when the sliding door is warped in the front-rear direction. Not only can the eccentric disc be smoothly opened and closed, but the eccentric disc fits into the guide groove opened below the upper guide rail without play in the front-rear direction. There is no rattling back and forth within the guide groove, and as a result, unlike the conventional case, there is no problem in opening and closing the sliding door. According to the invention of claim 2, by the synergistic effect of adjusting the front and rear positions of the wheels of the door roller and the position adjustment of the eccentric disc, the warp in the front and rear direction of the sliding door is absorbed better, and opening and closing of the sliding door is smoother. Can be done

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention with intermediate parts omitted.

FIG. 2 is an enlarged sectional view taken along line II-II of FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an enlarged view of a part of the portion A in FIG.

5 is a sectional view taken along line VV of FIG.

[Explanation of symbols]

2 Upper guide rail 5 sliding doors 10 eccentric disc 12 guide groove

Continued front page       (56) References JP-A-56-108477 (JP, A)                 58-23983 (JP, U)                 Actual Development Sho 51-23248 (JP, U)                 58-177473 (JP, U)

Claims (2)

(57) [Claims] 1. An eccentric disc having an axial center in the vertical direction is rotatably provided at an upper end portion of a sliding door and can be fixed at a predetermined position, and the eccentric disc is opened below an upper guide rail. A guide device for sliding doors that fits in the front-rear direction without play. 2. The guide device for a sliding door according to claim 1, wherein a door roller is provided at a lower end portion of the sliding door, and wheels of the door roller whose axial center is directed in the front-back direction are adjustable in front and rear positions.