JP4437962B2 - Door-to-door - Google Patents

Description

  The present invention relates to a door wheel used for a sliding part of furniture such as a sliding door (including a hanging door) and a movable bookcase.

  A configuration of a conventional door cart will be described with reference to FIGS. Here, a sliding door door is taken as an example.

  As shown in Patent Document 1, this door wheel has an inner frame 2 on which wheels 1 are rotatably mounted, an outer frame 3 that supports the inner frame 2 so as to be movable up and down, and a head 4a. An adjustment screw 4 that passes through the outer frame 3 from below and is screwed into the inner frame 2 while being exposed to the lower side of the frame 3, and the outer frame 3 and the inner frame so as to apply an upward spring force to the inner frame 2. A coil spring 5 provided on the outer periphery of the adjustment screw 4 between the frame 2 and a washer 6 fitted on the outer periphery of the adjustment screw 4 in a state of receiving the lower end of the coil spring 5 is provided.

  The inner frame 2 is supported by the outer frame 3 at one end in the left-right direction (the direction in which the wheel 1 rolls) by the horizontal axis 7 in the front-rear direction, and is rotated around the horizontal axis 7 by tightening and tightening the adjusting screw 4. Move to adjust the vertical position. That is, when the adjustment screw 4 is tightened, the inner frame 2 (wheel 1) is lowered, and when it is tightened, the inner frame 2 is raised.

The coil spring 5 holds the door frame on the lower surface of the sliding door 8 (shown in FIG. 7) and holds the inner frame 2 so as not to descend until it is attached to the door frame (only the door roller rail portion is shown in FIG. 7). To play a role.
JP 2002-147100 A

  However, according to the conventional door wheel, the adjusting screw 4 moves up and down as shown by a two-dot chain line in FIG. 8 due to an impact at the time of opening and closing the sliding door during use, and the screw 4 is loosened each time. There was a problem. In this case, the inner frame 2 is relatively raised and the sliding door 8 is tilted, so that the so-called poor installation is made. Therefore, improvement of this point has been demanded.

  Although not shown, a structure has been proposed in which a plate-like stopper is attached to the outer frame 3 and this stopper is locked to the lower end of the adjustment screw 4 to prevent the adjustment screw 4 from moving up and down. In addition, since the number of assembly steps increases and the cost increases significantly, it is not adopted in reality.

  Therefore, the present invention provides a door wheel that can prevent the adjustment screw from moving up and down without causing an increase in cost.

  According to the first aspect of the present invention, there is provided an inner frame on which wheels are rotatably mounted, an outer frame that supports the inner frame so as to be movable up and down, and a lower part of the outer frame with the head exposed to the lower side of the outer frame. An adjustment screw that penetrates from the side and is screwed into the inner frame, a coil spring that is provided on the outer periphery of the adjustment screw between the outer frame and the inner frame so as to apply an upward spring force to the inner frame, and the coil spring And a washer fitted to the outer periphery of the adjustment screw in a state where the lower end of the adjustment screw is received, and configured to be able to adjust the vertical position of the inner frame by the adjustment screw. A locking groove is provided in the inner periphery of the washer by locking the lower end of the coil spring against the washer in a state where the spring force in the diameter direction of the spring acts as a force pushing the washer in the diameter direction. The part is locked in the locking groove. It is obtained by adapted to restrain a screw in the vertical direction.

  According to a second aspect of the present invention, in the configuration of the first aspect, the inner peripheral portion of the washer is configured to be engaged with the screw groove at the lower end portion of the adjusting screw as the locking groove.

  According to a third aspect of the present invention, in the configuration of the first or second aspect, the lower end portion of the coil spring is inserted into the gap between the inner peripheral surface of the washer and the adjusting screw to be locked. .

  According to the present invention, the washer is pushed in the diametrical direction by the spring force in the diametrical direction of the coil spring, and the inner peripheral portion of the washer is locked in the locking groove of the adjusting screw (the screw groove of the adjusting screw itself in claim 2). Since the adjusting screw is restrained in the vertical direction, it is possible to reliably prevent the adjusting screw from being loosened during use.

Moreover,
(A) The washer, which was originally installed, is used as a stopper and no additional parts are required.
(B) In terms of assembly, it is only necessary to lock the lower end of the coil spring to the washer when the coil spring is assembled, so that there is no increase in the number of parts or a substantial increase in the number of assembly steps. For this reason, material cost and processing cost can be reduced, and the cost can be suppressed to almost the same as a door wheel without a stopper function.

  In particular, according to the invention of claim 2 in which the thread groove of the adjusting screw is used as the locking groove, it is not necessary to process the locking groove. Further, according to the invention of claim 3, the lower end portion of the coil spring is inserted into the gap between the inner peripheral surface of the washer and the adjusting screw and locked. For example, extra processing such as providing a locking hole in the washer is unnecessary. Become.

  For this reason, the processing cost is low and the cost is lower.

  An embodiment of the present invention will be described with reference to FIGS.

1st Embodiment (refer FIGS. 1-4)
The basic configuration of the door cart according to the first embodiment is the same as the conventional door cart shown in FIGS.

  That is, in this door wheel, the inner frame 12 to which the wheels 11 are rotatably attached, the outer frame 13 that supports the inner frame 12 so as to be movable up and down, and the head 14 a are exposed to the lower side of the outer frame 13. The adjustment screw 14 that passes through the outer frame 13 from below and is screwed into the inner frame 12, and the adjustment screw 14 between the outer frame 13 and the inner frame 12 so as to apply an upward spring force to the inner frame 12. And a washer 16 fitted to the outer periphery of the adjusting screw 14 in a state of receiving the lower end of the coil spring 15.

  The inner frame 12 is supported by the outer frame 13 at one end in the left-right direction by a horizontal shaft 17 in the front-rear direction, and is rotated around the horizontal shaft 17 by adjusting and tightening the adjusting screw 14 to adjust the vertical position. .

  In this door wheel, the lower end portion of the coil spring 15 is bent downward and outward in the diametrical direction to form a locking portion 15a, and the locking portion 15a is connected to the inner peripheral surface of the washer 16 as shown in FIG. It is inserted into the gap C between the adjusting screw 14 and locked to the inner peripheral surface of the washer.

  As a result, the spring force in the diametrical direction of the coil spring 15 acts as a force that pushes the washer 16 in the diametrical direction as indicated by an arrow in FIG. The portion is locked to a screw groove (locking groove) 14 b at the lower end of the adjustment screw 14.

  A portion A indicated by crossed diagonal lines in FIG. 4 is a locking portion of the inner periphery of the washer with respect to the screw groove 14b, and the vertical movement of the washer 16 is stopped by the locking portion A.

  The adjusting screw 14 is restrained in the vertical direction by the washer 16 and the screw head 14a located on the opposite side across the outer frame 13.

  With this configuration, loosening of the adjusting screw 14 in use can be reliably prevented.

  In addition, since the washer 16 that is originally provided is also used as a stopper for preventing vertical movement, and no additional parts are required, the number of parts does not increase.

  Also, in terms of assembly, since only the locking portion 15a at the lower end of the coil spring 15 needs to be locked to the inner peripheral side of the washer 16 when the coil spring 15 is assembled, the number of assembly steps is not increased.

On the other hand, in terms of processing,
(i) It is only necessary to bend the lower end portion of the coil spring 15 to form the locking portion 15a.

  (ii) In the case of this embodiment, since the screw groove 14b at the lower end of the adjustment screw 14 is used as a locking groove, it is not necessary to process the locking groove.

  (iii) Since the locking portion 15a of the coil spring 15 is inserted and locked in the gap C between the inner peripheral surface of the washer and the adjusting screw 14, there is no need to provide a locking hole in the washer 16, for example.

  In these respects, the material cost, processing cost, and assembly cost can be reduced, and the cost can be suppressed to approximately the same level as that of a door wheel without a stopper function.

Second embodiment (see FIG. 5)
Only differences from the first embodiment will be described.

  In the second embodiment, a locking groove 14 c into which the inner peripheral part of the washer 16 is fitted is provided on the outer periphery of the lower end part of the adjusting screw 14 over the entire periphery.

  In this way, the processing cost is slightly increased, but the locked state of the washer 16 is more reliable and stable.

  By the way, the lower end portion (locking portion 15a) of the coil spring 15 is sufficient to be inserted and locked into the gap C between the inner peripheral surface of the washer 16 and the adjusting screw 14 as in the above embodiment. However, if necessary, a locking hole may be provided in the washer 16 and the lower end of the spring may be locked in the locking hole.

  In addition, the present invention is particularly suitable for sliding door doors in which the adjustment screw 14 is easily loosened, but can also be applied to door wheels used for sliding parts of furniture such as mobile bookcases.

It is a disassembled perspective view of the door pulley concerning 1st Embodiment of this invention. It is a partially expanded sectional view of the assembly state. FIG. 3 is a view further enlarging a part of FIG. 2 and showing an adjusting screw as a cross section. It is the IV-IV sectional view taken on the line of FIG. FIG. 6 is a view corresponding to FIG. 5 of a door cart according to a second embodiment of the present invention. It is a disassembled perspective view of the conventional door roller. It is sectional drawing of the same assembly state. It is a figure which expands and shows a part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Wheel 12 Inner frame 13 Outer frame 14 Adjustment screw 14a Screw head 14b Screw groove 15 Coil spring 15a The lower end part (locking part) of a coil spring
16 Washer 17 Horizontal shaft with inner frame attached to outer frame

Claims (3)

  An inner frame on which wheels are rotatably mounted, an outer frame that supports the inner frame so as to move up and down, and an inner frame that penetrates the outer frame from below with the head exposed to the lower side of the outer frame. An adjustment screw screwed in, a coil spring provided on the outer periphery of the adjustment screw between the outer frame and the inner frame so as to apply an upward spring force to the inner frame, and a state in which the lower end of the coil spring is received. And a washer configured to adjust the vertical position of the inner frame with the adjustment screw, and provided with a locking groove on the outer periphery of the lower end of the adjustment screw. By locking the lower end portion of the coil spring against the washer in a state where the spring force in the diametrical direction of the spring acts as a force pushing the washer in the diametrical direction, the inner peripheral portion of the washer is retained in the locking groove. Lock the adjustment screw vertically Door roller, characterized by being configured to bundle.   The door wheel according to claim 1, wherein the inner peripheral portion of the washer is configured to be engaged with a screw groove at a lower end portion of an adjustment screw serving as a locking groove.   The door wheel according to claim 1 or 2, wherein a lower end portion of the coil spring is inserted and locked in a gap between an inner peripheral surface of the washer and an adjusting screw.

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