JP2015132336A - actuator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an actuator capable of downsizing the actuator and suppressing a manufacturing cost, by integrally configuring a guide structure.SOLUTION: An actuator is equipped with a track member extended in a longitudinal direction, a pair of moving members assembled along the track member so as to linearly move, a driving member for rotation-driving a gear whose rotary shaft is disposed within width orthogonal to the longitudinal direction of the track member, and a transmission member for converting the rotary motion of the gear into linear motion for bringing the pair of the moving members close to each other or separating the pair of the moving members from each other. The transmission member is equipped with an attaching portion attached to the moving member, an engaging portion disposed in parallel with the attaching portion and formed with a linear teeth portion engaged with either one of an upper end or a lower end of the gear, and a continuing portion for communicating the attaching portion and the engaging portion. The engaging portion engages with the upper end and the lower end of the gear.

Description

  The present invention relates to an actuator that guides an object, and more particularly, to an actuator that linearly guides a pair of objects so as to be relatively close to and away from each other.

  2. Description of the Related Art Conventionally, various structures are known as actuators that open and close a door as a target, such as an elevator door, by relatively approaching and separating the door.

  Various types of such actuators are known. For example, as shown in Patent Document 1 below, the actuator is configured to relatively close and separate an object using a belt or a rack and pinion. .

JP 2004-217338 A

  However, according to the conventional actuator, although the relative approach / separation operation of the object can be realized using a belt, a rack and a pinion, etc., a separate rail or the like is used to guide a heavy object such as a door. There is a problem that guide means is required, which leads to an increase in the size of the entire apparatus, and it is difficult to suppress the manufacturing cost associated with the increase in the size and the number of parts.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an actuator that can reduce the size of the actuator and reduce the manufacturing cost by integrally forming a guide structure. And

  An actuator according to the present invention includes a raceway member extending along a longitudinal direction, a pair of moving members assembled so as to be linearly movable along the raceway member, and within a width orthogonal to the longitudinal direction of the raceway member. An actuator comprising: a drive member that rotationally drives a gear having a rotating shaft disposed thereon; and a transmission member that converts the rotational motion of the gear into a linear motion that moves the pair of moving members closer to or away from each other. An attachment portion attached to the moving member, an engagement portion formed in parallel with the attachment portion, and formed with a linear tooth portion that meshes with either the upper end or the lower end of the gear, and the attachment And a continuous portion that communicates with the engaging portion, and the engaging portion meshes with an upper end and a lower end of the gear, respectively.

  According to the present invention, the transmission member is provided with an attachment portion attached to the moving member, and a linear tooth portion that is arranged in parallel with the attachment portion and meshes with either the upper end or the lower end of the gear. A connecting portion and a continuous portion that connects the mounting portion and the engaging portion, and the engaging portion is configured to mesh with the upper end and the lower end of the gear, respectively, and a drive structure that drives the moving member; The guide structure that loads the load associated with the guide can be integrally formed, and the entire actuator can be reduced in size and the manufacturing cost can be reduced.

The perspective view for demonstrating the actuator which concerns on embodiment of this invention. The side view explaining the guide apparatus which concerns on embodiment of this invention. The perspective view for demonstrating the board | substrate member which concerns on embodiment of this invention. The perspective view of the transmission member which concerns on embodiment of this invention.

  Embodiments of an actuator according to the present invention will be described below with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

  FIG. 1 is a perspective view for explaining an actuator according to an embodiment of the present invention, FIG. 2 is a side view for explaining a guide device according to the embodiment of the present invention, and FIG. FIG. 4 is a perspective view for explaining a substrate member according to the embodiment, and FIG. 4 is a perspective view of a transmission member according to the embodiment of the present invention.

  As shown in FIG. 1, the actuator 1 according to the present embodiment includes a guide member that includes a track member 11 that extends along the longitudinal direction and a moving member 12 that is assembled along the track member 11 so as to be linearly movable. A pair of devices 10 arranged on the left and right, and a gear 21 attached so that the rotation shaft is disposed within the width of the track member 11 perpendicular to the longitudinal direction of the track member 11 between the guide devices 10 and 10; And a driving member 20 for rotating the gear 21. Further, the guide devices 10, 10, the gear 21, and the drive member 20 are attached to the board member 40, and the board member 40 is attached to the fixed object, and the drive member on the side of the board member 40 facing the fixed object. 20 is attached, and the gear 21 and the track member 11 are attached to the opposite surface on the opposite side. The driving member 20 can use various elements such as an electric motor.

  The gear 21 that is rotationally driven by the drive member 20 meshes with the transmission members 30 and 30 having linear teeth 33 that engage with the upper and lower ends, and converts the rotational motion into linear motion. By being assembled to the moving members 12 and 12, respectively, the pair of moving members 12 and 12 can be moved synchronously so as to approach and separate from each other. In the present specification, the upper end and the lower end will be described below as end portions along the vertical direction of the paper surface in FIG.

  In the transmission member 30, the support member 46 that supports the linear motion of the transmission member 30 is in contact with the surface opposite to the surface on which the linear teeth 33 are formed. Further, a detection member 50 for detecting the position of the moving member 12 is provided, and control is possible so that the moving member 12 does not move beyond the position of the detection member 50.

  As shown in FIG. 2, the guide device 10 has a rolling element rolling groove 11a in the longitudinal direction of the inner surface formed by bending the upper and lower ends (width direction end portions) of the belt-shaped metal plate in an inward arc shape. C-shaped track member 11 and a substantially C-shaped cross section having rolling element rolling grooves 12a in the longitudinal direction of the outer surface formed by curving the upper and lower ends (ends in the width direction) of the belt-shaped metal plate in an outward arc shape. And a plurality of rolling elements 13 arranged between the rolling element rolling grooves 11 a of the raceway member 11 and the rolling element rolling grooves 12 a of the moving member 12.

  As shown in FIG. 1, since the moving member 12 reciprocates in the longitudinal direction of the track member 11, the length of the moving member 12 is formed shorter than the length of the track member 11. Moreover, the track member 11 and the moving member 12 are formed by press-molding a band-shaped metal plate or the like, and can be manufactured easily and inexpensively.

  The rolling element 13 is rotated between the rolling element rolling groove 11 a of the track member 11 and the rolling element rolling groove 12 a of the moving member 12 by a cage 14 in which a hole having a diameter slightly smaller than the diameter of the rolling element 13 is formed. It is held freely. The rolling element rolling groove 11 a of the race member 11 and the rolling element rolling groove 12 a of the moving member 12 are formed in a single arc having a slightly larger curvature than the radius of curvature of the rolling element 13. The cage 14 is disposed along the longitudinal direction of the track member 11 and is longer than the moving member 12.

  Further, the guide device 10, the drive member 20, and the gear 21 are assembled to the board member 40, and the raceway member 11 is attached to the board member 40, so that it is not necessary to make the raceway members 11 and 11 parallel to each other easily. In addition, it can be fixed on a base with high accuracy.

  As shown in FIG. 3, the board member 40 includes a drive member mounting portion 42 formed substantially at the center and a pair of track member mounting portions 41, 41 extending from the drive member mounting portion 42 along the left-right direction. It has.

  The drive member attachment portion 42 has a drive member attachment hole 47 in which the rotation shaft of the gear 21 is inserted and the drive member 20 is attached to the central portion thereof. In addition, a pair of support member mounting portions 45, 45 extending in a direction substantially perpendicular to the extending direction of the track member mounting portion 41 is provided. Cylindrical support members 46 and 46 are assembled to the support member mounting portions 45 and 45, respectively.

  In addition, a fixed portion 44 is formed at one end of the track member mounting portion 41, and the fixed portion 44 is screwed into a fixed object such as a base through an mounting hole formed in the fixed portion 44. The actuator 1 can be attached and fixed. The track member mounting portion 41 is formed with a detection member mounting portion 43 for mounting the detection member 50. The detection member 50 is preferably a so-called position sensor, and various sensors such as an optical sensor and a magnetic sensor can be applied.

  The transmission member 30 is disposed on a substantially central axis extending in parallel with the longitudinal direction of the track member 11 and is attached to the moving member 12, and a linear tooth portion 33 that meshes with one of the upper end and the lower end of the gear 21. And an engaging portion 32 formed parallel to the attaching portion 31 so as to move horizontally in the width direction with respect to the attaching portion 31, and a continuous portion 34 connecting the attaching portion 31 and the engaging portion 32. I have. Further, a pair of transmission members 30 are provided so as to mesh with the upper end or lower end of the gear 21, and are disposed point-symmetrically with the rotation axis of the gear 21 as a symmetric point. As described above, the transmission member 30 includes the attachment portion 31 disposed on the substantially central axis of the track member 11 and the engagement portion 32 horizontally moved from the central axis so as to mesh with the gear 21. Since it is formed in a bowl shape by the continuous portion 34 that integrally connects the joint portion 32, the guide structure and the drive structure can be configured integrally and in a small size.

  As shown in FIG. 4, the attachment portion 31 is provided with a fixing hole 35 for assembling the transmission member 30 to the moving member 12 and an attachment hole 36 for attaching the object to be guided. A detection unit 37 is formed. With this configuration, when the moving member 12 reaches the position of the detection member 50, the detection member 50 detects the detection unit 37 and sends the information to a control device (not shown).

  The transmission member 30 is preferably made of a synthetic resin. In this case, the support member is provided on the surface 32a opposite to the surface where the linear teeth 33 of the engaging portion 32 are formed so that the meshing between the gear 21 and the linear teeth 33 is not released due to the warp or deformation of the synthetic resin. 46 abuts. The support member 46 is preferably formed in a cylindrical shape so as not to hinder the linear motion of the transmission member 30. The support member 46 may support any position in the longitudinal direction as long as the support member 46 supports the opposite surface 32a. However, the linear tooth portion 33 and the gear 21 are more reliably engaged with each other. In order to hold, it is preferable that the rotation axis of the gear 21 and the central axis of the support member 46 are arranged in a straight line in the vertical direction.

  Moreover, although the transmission member 30 is each assembled | attached to the left and right moving members 12 and 12, it is suitable if the transmission member 30 is made into the same shape. In this way, by making the transmission member 30 the same shape, the manufacturing cost can be further suppressed.

  Since the actuator 1 described above converts the rotational motion into a linear motion by moving the moving member 12 close to and away from each other by the transmission member 30 meshing with the upper and lower ends of the gear 21, the entire actuator is reduced in size. be able to. Further, the track member 11 and the driving member 20 are arranged side by side on the same line, and the pair of moving members 12 and 12 are moved by the single driving member 20 and the driving member 12 is driven. And the guide structure that loads the load accompanying the guidance of the object are integrally configured, the entire actuator can be reduced in size, and the manufacturing cost can be suppressed.

  Further, since the support member 46 that supports the engagement portion 32 so as to maintain the meshing between the linear teeth 33 of the engagement portion 32 and the gear 21 is provided, the transmission member 30 is supported by the loaded load. It is possible to prevent the meshing between the linear tooth portion 33 and the gear 21 due to deformation or the like.

  In addition, since the detection member 50 that detects at least one of the start end or the end of the movement of the moving member 12 is provided, the drive member 20 rotates beyond the movable range of the moving member 12, so that the linear teeth It is possible to prevent the meshing between the portion 33 and the gear 21 from being released.

  In addition, since the component parts are assembled to the board member 40 to which the track member 11 and the drive member 20 are integrally assembled, the track members 11 and 11 attached to the left and right can be easily mounted on the base without separately carrying out horizontal alignment. In addition, assembly can be performed with high accuracy.

  In the above-described embodiment, the embodiment in which the track members 11 are arranged on the left and right sides has been described. However, a single track member 11 is arranged in a series in the longitudinal direction, and a pair of moving members is provided on the track member. In addition to being assembled, the drive member may be attached to the side of the raceway member that faces the fixation target, and the gear may be assembled to the opposite surface of the opposite side. In this case, the drive member attachment hole 47 for attaching the drive member 20 to the race member 11 is provided, and the drive member attachment portion 42 and the support member attachment portion 45 are formed integrally with the race member 11, so that the substrate member 40 is not provided. An actuator can be configured, and the manufacturing cost can be reduced by reducing the number of parts. Further, in this case, since the actuator is configured by assembling the components on the single track member 11, there is no need to perform leveling when the actuator is fixed to a fixed object.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention. For example, in the present embodiment, the guide device 10 has been described by taking a so-called slide rail including the track member 11 and the moving member 12 as an example. However, the guide device 10 is not limited to this, and for example, the guide device 10 is assembled in a saddle shape on the track member. You may use the linear motion guide apparatus provided with the moving block provided.

  In the present embodiment, the guide device 10 has been described with respect to the form in which the rolling elements 13 are arranged along the longitudinal direction. However, the sliding type or the rolling elements 13 that do not have the rolling elements 13 are finite or infinite circulation. You may use the circulation type to do. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Actuator, 11 Track member, 12 Moving member, 20 Drive member, 21 Gear, 30 Transmission member, 31 Mounting part, 32 Engagement part, 33 Linear tooth part, 34 Continuous part, 40 Substrate member, 46 Support member, 50 Detection member.

Claims (4)

A track member extending along the longitudinal direction;
A pair of moving members assembled so as to be linearly movable along the track member;
A drive member that rotationally drives a gear having a rotation shaft disposed within a width orthogonal to the longitudinal direction of the track member;
An actuator comprising a transmission member that converts the rotational motion of the gears into a linear motion that moves the pair of moving members closer or away from each other,
The transmission member is provided with an attachment portion attached to the moving member, and an engagement portion formed in parallel with the attachment portion, and formed with a linear tooth portion that meshes with either the upper end or the lower end of the gear. And a continuous portion that connects the attachment portion and the engagement portion,
The actuator is characterized in that the engaging portion meshes with an upper end and a lower end of the gear. The actuator according to claim 1, wherein
An actuator comprising: a support member that supports a surface of the engagement portion opposite to a surface that meshes with the gear. The actuator according to claim 1 or 2,
The track member and the drive member are assembled to a substrate member,
The board member is attached to a fixed object, the drive member is attached to a side of the board member facing the fixed object, and the gear and the track member are attached to the opposite surface of the opposed side. Characteristic actuator. The actuator according to claim 1 or 2,
The track member is assembled with a pair of the moving members and attached to a fixed object, the drive member is mounted on the side of the track member facing the fixed object, and the gear on the opposite surface of the facing side An actuator characterized by being attached.

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