JP6577985B2 - Drum and sliding door structure - Google Patents

Description

  The present invention relates to a drum and a sliding door structure.

  Patent Document 1 describes a drum in which a cable for pulling a sliding door for an automobile is wound around a spiral groove. The drum includes, as a spiral groove portion, a reference diameter portion that becomes a reference system as a winding diameter when the linear portion of the guide rail is moved, and a large diameter changing portion and a small diameter changing portion that change to a large and small diameter. .

JP 2008-68643 A

  In the drum described in Patent Document 1, the large-diameter changing portion and the small-diameter changing portion are adjacent to each other for one turn, and the change in the winding diameter is abrupt. Therefore, there is a possibility that the part of the cable to be wound around the large diameter changing portion may be wound around the small diameter changing portion after one turn. In such a case, desired torque or the like cannot be applied to the slide door.

  This invention is made | formed in view of the said point, and makes it a subject to provide the drum and slide door structure which can suppress that a cable partially skips a groove part and is wound. .

In order to solve the above-described problems, the drum of the present invention has a spiral groove formed on the outer peripheral surface, and is a drum in which a cable is wound around the groove, and is formed on one end side in the axial direction. A large diameter portion having a large trunk diameter of the groove portion, a small diameter portion having a small trunk diameter of the groove portion, and connecting the large diameter portion and the small diameter portion. A diameter changing portion in which the body diameter of the groove portion gradually decreases from the large diameter portion side toward the small diameter portion side, and the outer peripheral surface between the groove portions in the axial direction in the diameter changing portion is: The taper shape which inclines so that it may become narrow toward the said small diameter part side from the said large diameter part side is characterized by the above-mentioned.

  According to the present invention, it is possible to suppress the cable from partially winding the groove and being wound around the drum.

1 is a perspective view schematically showing a vehicle to which a sliding door structure according to an embodiment of the present invention is applied. It is a figure showing typically the drum concerning the embodiment of the present invention. It is a figure which shows typically the rail, slider, drum, and cable in a door closed state. It is a figure which shows typically the rail in the door open state, a slider, a drum, and a cable. It is a figure which shows typically an example of the relationship between the general part and retracting part of a rail, and the large diameter part of a drum, a diameter change part, and a small diameter part. It is a figure which shows typically an example of the relationship between the general part and retracting part of a rail, and the large diameter part of a drum, a diameter change part, and a small diameter part. It is a figure which shows typically the drum which concerns on the 1st modification of this invention. It is a figure which shows typically the drum which concerns on the 2nd modification of this invention.

  Embodiments of the present invention will be described in detail with reference to the drawings, taking as an example the case where the drum and slide door structure of the present invention is applied to a vehicle slide door. In the following description, the same elements are denoted by the same reference numerals, and redundant descriptions are omitted. Note that “front and rear” indicated by arrows in each figure indicates the longitudinal direction of the vehicle body, “up and down” indicates the vertical direction of the vehicle body, and “left and right” indicates the left and right direction (vehicle width direction) viewed from the driver's seat. Show.

  As shown in FIG. 1, a slide door structure 1 according to an embodiment of the present invention is a structure for opening and closing a slide door 20 corresponding to an opening 2 a formed on a side surface of a vehicle body 2 in a vehicle C. The slide door structure 1 includes a plurality of (three in this embodiment) rails 10, a slide door 20, and a drive unit 3.

<Rail>
The plurality of rails 10 are members that guide the slide door 20 so as to be slidable in the opening / closing direction (front-rear direction). Each rail 10 is integrally provided with a general portion 11 extending in the front-rear direction and a retracting portion 12 extending inward in the vehicle width direction from the front end portion (close direction end portion) of the general portion 11. The slide door structure 1 includes an upper rail 10X, a center rail 10Y, and a lower rail 10Z as a plurality of rails 10.

  The upper rail 10X extends in the front-rear direction along the upper edge portion of the opening 2a. The center rail 10Y extends in the front-rear direction at the intermediate portion in the height direction on the rear edge side of the opening 2a. The lower rail 10Z extends in the front-rear direction along the lower edge of the opening 2a.

<Sliding door>
The slide door 20 includes a door main body 21 having a shape capable of closing the opening 2a, and a plurality of (three in this embodiment) sliders 22 provided on the inner side of the door main body 21 in the vehicle width direction. . Each slider 22 includes a roller that can roll in the rail 10 corresponding to the slider 22. The slide door structure 1 includes an upper slider 22X, a center slider 22Y, and a lower slider 22Z as a plurality of sliders 22.

  The upper slider 22X is provided at the front upper end of the door main body 21, and is movable in the opening / closing direction along the upper rail 10X. The center slider 22Y is provided at an intermediate portion in the height direction at the rear end portion of the door body 21, and is movable in the opening / closing direction along the center rail 10Y. The lower slider 22Z is provided at the front lower end of the door body 21, and is movable in the opening / closing direction along the lower rail 10Z.

<Drive unit 3>
The drive unit 3 is a unit for opening and closing the slide door 20, and includes a motor 30, a drum 40 that rotates forward and backward by the motor 30, a first cable 51 and a first cable 51 that are connected to the drum 40 and the center slider 22Y. A second cable 52. In the present embodiment, the motor 30 rotates the drum 40 forward and backward at a constant rotational speed.

<Drum>
As shown in FIG. 2, the drum 40 is installed such that the axial direction (rotating shaft) of the drum 40 extends in the vehicle width direction. The outer peripheral surface 40a of the drum 40 is formed with a spiral groove 40b in which the first cable 51 and the second cable 52 are wound and can be accommodated. The drum 40 has a large-diameter portion 41 from one axial end portion (in this embodiment, the inner end portion in the vehicle width direction) toward the other axial end portion (in the present embodiment, the outer end portion in the vehicle width direction), The diameter changing portion 42 and the small diameter portion 43 are integrally provided.

The large diameter portion 41 is a section that includes an axial end portion of the drum 40, R ₁ (the outer diameter of the bottom of the groove) barrel diameter of the spiral groove 40b is relatively large sites. The small diameter portion 43 is a section containing the other axial end portion of the drum 40, body diameter R ₃ of the helical groove 40b is relatively small site. The diameter changing portion 42 is a portion that connects the large diameter portion 41 and the small diameter portion 43, and the portion (contracted) where the body diameter of the spiral groove 40 b gradually decreases from the large diameter portion 41 side toward the small diameter portion 43 side. Diameter part). In other words, the diameter changing portion 42 is a portion (diameter-enlarged portion) that continuously increases gradually as the body diameter of the spiral groove 40b moves from the small diameter portion 43 side to the large diameter portion 41 side. The maximum value of the body diameter of the spiral groove 40b in the diameter change portion 42 is equal to a barrel diameter R ₁ of the spiral groove 40b in the large-diameter portion 41, the minimum value of the body diameter of the spiral groove 40b in the diameter change portion 42, the small diameter portion equal to a barrel diameter _{R 3} of the spiral grooves 40b in 43.

In the diameter changing portion 42, the outer peripheral surface 40a of the drum 40 (the surface connecting the spiral grooves 40b in the axial direction) becomes narrower (reduced in diameter) from the large diameter portion 41 side toward the small diameter portion 43 side. It becomes the surface 40c. Maximum outer diameter of the tapered surface 40c is equal to the outer diameter _{D 1} of the outer peripheral surface 40a of the large-diameter portion 41, the minimum value of the outer diameter of the tapered surface 40c, the outer diameter _{D 3} of the outer peripheral surface 40a of the small-diameter portion 43 be equivalent to.

In the present embodiment, the spiral groove 40 b of the large diameter portion 41 is formed two or more times so as to correspond to the general portion 11 of the rail 10. Further, the spiral groove 40 b of the diameter changing portion 42 is formed two or more times so as to correspond to the retracting portion 12 of the rail 10. Further, one round of the other axial end of the spiral groove 40 b of the diameter changing portion 42 corresponds to the small diameter portion 43. Circumferential speed of the spiral groove 40b in the diameter change portion 42 be at least one turn or more, the difference between the body diameter _{R 3} of the spiral grooves 40b in trunk diameter _{R 1} and the small-diameter portion 43 of the helical groove 40b of the large-diameter portion 41 It can be set according to.

<First cable>
As shown in FIGS. 3 and 4, the first cable 51 is a cable for pulling the slide door 20 (see FIG. 1) in the door closing direction (forward), and slides with one end of the drum 40 in the axial direction. The door 20 is connected. In the present embodiment, one end portion of the first cable 51 is connected to one axial end portion (large diameter portion 41 side) of the drum 40, and the other end portion of the first cable 51 is connected to the slide door 20. It is connected to the front end of the center slider 22Y.

<Second cable>
The second cable 52 is a cable for pulling the slide door 20 in the door opening direction (rearward), and connects the other axial end of the drum 40 and the slide door 20. In the present embodiment, one end of the second cable 52 is connected to the other end of the drum 40 in the axial direction (the small diameter portion 43 side), and the other end of the second cable 52 is the center of the slide door 20. It is connected to the rear end of the slider 22Y.

  The first cable 51 and the second cable 52 are provided so as to be wound around the drum 40 in directions opposite to each other. That is, the first cable 51 is drawn from the drum 40 when the drum 40 rotates forward, and is wound around the drum 40 so as to go from one axial end to the other axial end when the drum 40 rotates backward. It is done. The second cable 52 is wound around the drum 40 so as to go from the other axial end to the one axial end when the drum 40 rotates forward, and is pulled out from the drum 40 when the drum 40 rotates backward. It is. Between the drum 40 and the center rail 10Y, the first cable 51 and the second cable 52 are respectively guided by guide pulleys (not shown). 3 and 4, the first cable 51 and the second cable 52 are different in thickness from the first cable 51 wound around the drum 40 or the second cable. This is a measure for making it easier to understand whether the number is 52.

<Operation example>
When the drum 40 rotates forward in accordance with the driving of the motor 30 with the slide door 20 shown in FIG. 3 closed, the first cable 51 is drawn from the drum 40 and the second cable 52 is wound around the drum 40. It is done. As a result, the center slider 22Y slides backward, and the slide door 20 is opened (see FIG. 4).

  At the initial stage of the opening operation, the center slider 22Y moves the retracting portion 12 of the center rail 10Y. Here, the first cable 51 is drawn from the small diameter portion 43 or the diameter changing portion 42 of the drum 40, and the second cable 52 is wound around the small diameter portion 43 or the diameter changing portion 42 of the drum 40. Yes. Therefore, the slide door 20 slides at a relatively low speed and high torque.

  Further, the center slider 22Y moves in the general portion 11 of the center rail 10Y during the middle to late stages of the opening operation. Here, the first cable 51 is drawn from the large-diameter portion 41 of the drum 40, and the second cable 52 is wound around the large-diameter portion 41 of the drum 40. Therefore, the slide door 20 slides at a relatively high speed and low torque.

  On the other hand, when the drum 40 rotates in reverse with the driving of the motor 30 in the state where the slide door 20 shown in FIG. 4 is opened, the first cable 51 is wound around the drum 40 and the second cable 52 is connected to the drum 40. Drawn from. As a result, the center slider 22Y slides forward, and the slide door 20 is closed (see FIG. 3).

  The center slider 22Y moves in the general portion 11 of the center rail 10Y during the initial to middle period of the closing operation. Here, the first cable 51 is wound around the large-diameter portion 41 of the drum 40, and the second cable 52 is drawn from the large-diameter portion 41 of the drum 40. Therefore, the slide door 20 slides at a relatively high speed and low torque.

  Further, in the latter stage of the closing operation, the center slider 22Y moves the retracting portion 12 of the center rail 10Y. Here, the first cable 51 is wound around the diameter changing portion 42 or the small diameter portion 43 of the drum 40, and the second cable 52 is drawn from the diameter changing portion 42 or the small diameter portion 43 of the drum 40. Yes. Therefore, the slide door 20 slides at a relatively low speed and high torque.

As shown in FIG. 5, the large diameter portion 41 corresponds to the entire general portion 11 and a part of the retracting portion 12, and the diameter changing portion 42 and the small diameter portion 43 correspond to the remaining portion of the retracting portion 12. Good. Here, “the large diameter portion 41 corresponds to all of the general portion 11 and a part of the retracting portion 12” means that “the slider 22 has the large diameter portion 41 of the entire general portion 11 and a part of the retracting portion 12. In the case where it is located at either position, it means that at least one of the first cable 51 and the second cable 52 is drawn out or wound up from the large-diameter portion 41. Similarly, “the diameter changing portion 42 and the small diameter portion 43 correspond to the remaining portion of the retracting portion 12” means “when the slider 22 is located in the remaining portion of the retracting portion 12, the first cable 51 and the second cable 52 is drawn out or wound up from either the diameter changing portion 42 or the small diameter portion 43.
In this case, the moving speed of the slide door 20 in the general part 11 can be made constant, and the uncomfortable feeling given to the user can be suppressed. Moreover, the change of the moving speed of the sliding door 20 in the drawing-in part 12 can be made continuous, and the discomfort given to a user can be suppressed as much as possible.

As shown in FIG. 6, the large-diameter portion 41 corresponds to a part of the general portion 11, and the diameter changing portion 42 and the small-diameter portion 43 correspond to all of the remaining portion of the general portion 11 and the retracting portion 12. Good. Here, “the large-diameter portion 41 corresponds to a part of the general portion 11” means “when the slider 22 is located at a part of the general portion 11, the first cable 51 and the first cable 51. “At least one of the two cables 52 is drawn out or wound up from the large-diameter portion 41”. Similarly, “the diameter changing portion 42 and the small diameter portion 43 correspond to the remaining portion of the general portion 11 and all of the retracting portion 12” means that “the slider 22 is either the remaining portion of the general portion 11 or all of the retracting portion 12. When it is located, it means that both the first cable 51 and the second cable 52 are drawn out or wound up from either the diameter changing portion 42 or the small diameter portion 43.
In this case, even when it is difficult to open and close the slide door 20 due to, for example, snowfall, freezing, etc., the sliding door 20 is moved from the remaining part of the general part 11 to the retracting part 12 with high torque, and is opened and closed. The operation can be stabilized.

In the drum 40 according to the embodiment of the present invention, since the diameter changing portion 42 continuously connects the large diameter portion 41 and the small diameter portion 43, the cables 51 and 52 can be connected without applying a large tension to the cables 51 and 52. It is possible to prevent the spiral groove 40b from being partially wound (for example, one turn) and wound.
In addition, the drum 40 is designed so that even if the cables 51 and 52 are wound by partially skipping the spiral groove 40b (for example, one turn), the diameter change of the spiral groove 40b is not so large. Almost desired speed and torque can be applied to 51 and 52.
In addition, since the drum 40 does not have a portion that undergoes a sudden diameter change, excessive demands on the accuracy of speed control of the motor 30 can be suppressed.

  Moreover, since the outer peripheral surface 40a in the diameter change part 42 is the taper surface 40c, the cables 40 are easily wound around the spiral groove 40b.

  Further, in the slide door structure 1 according to the embodiment of the present invention, the diameter changing portion 42 and the small diameter portion 43 of the drum 40 correspond to the retracting portion 12, so that when the slide door 20 moves the retracting portion 12, Torque can be secured and the certainty of closing of the slide door 20 can be improved.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can deform | transform suitably. For example, as shown in FIG. 7 as a first modification, the drum 40A includes a large-diameter portion 41 having one or more rounds, a diameter changing portion 42 having one or more rounds, and a small-diameter portion 43 having one or more rounds. It may be a configuration. Further, as shown in FIG. 8 as a second modified example, the drum 40 </ b> B may be configured to include a diameter changing portion 42 having three or more rounds. Here, one round at one end in the axial direction of the diameter changing portion 42 corresponds to the large diameter portion 41, and one round at the other end in the axial direction of the diameter changing portion 42 corresponds to the small diameter portion 43.

DESCRIPTION OF SYMBOLS 1 Slide door structure 2 Car body 2a Opening part 10 Rail 20 Sliding door 21 Door main body 22 Slider 30 Motor 40, 40A, 40B Drum 40a Outer peripheral surface 40b Spiral groove (groove part)
40c Tapered surface 41 Large diameter portion 42 Diameter changing portion 43 Small diameter portion 51 First cable 52 Second cable C Vehicle

Claims (4)

A groove portion having a spiral shape is formed on the outer peripheral surface, and a drum in which a cable is wound around the groove portion,
A large diameter portion formed on one end side in the axial direction and having a large trunk diameter of the groove portion,
A small diameter part formed on the other end side in the axial direction and having a small body diameter of the groove part;
The large diameter portion and the small diameter portion are connected, and the diameter of the groove portion gradually decreases from the large diameter portion side toward the small diameter portion side, and
Equipped with a,
The drum having a tapered shape in which the outer peripheral surface between the groove portions in the axial direction in the diameter changing portion is inclined so as to become narrower from the large-diameter portion side toward the small-diameter portion side. . A drum according to claim 1 ;
Rails,
A sliding door movable along the rail;
A first cable connecting the one axial end of the drum and the sliding door;
A second cable connecting the other axial end of the drum and the slide door;
With
The rail is provided at a general portion extending in the opening / closing direction of the slide door and at an end portion of the general portion in the closing direction of the slide door, and is extended in a direction in which the slide door is drawn into the opening. A lead-in part,
When the drum rotates forward, the first cable is pulled out from the drum and the second cable is wound around the drum, whereby the sliding door moves in the opening direction,
When the drum rotates in the reverse direction, the first cable is wound around the drum and the second cable is pulled out from the drum, whereby the sliding door moves in the closing direction,
The large-diameter portion corresponds to the general portion, and the small-diameter portion and the diameter-changing portion correspond to the retracting portion. The sliding door structure according to claim 2 , wherein the large-diameter portion corresponds to the general portion to a part of the retracting portion. The sliding door structure according to claim 2 , wherein the small-diameter portion and the diameter-changing portion correspond to the retracting portion to a part of the general portion.

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