WO2017082187A1

WO2017082187A1 - Drive device

Info

Publication number: WO2017082187A1
Application number: PCT/JP2016/082923
Authority: WO
Inventors: 小川　吉典; 一美古林
Original assignee: 日本電産サンキョー株式会社
Priority date: 2015-11-13
Filing date: 2016-11-07
Publication date: 2017-05-18
Also published as: JP2017089836A

Abstract

A drive device which can be manufactured efficiently and which uses a feed screw is provided. Specifically, in a compound drive device (1), a feed screw (70) of a linear drive mechanism (7) has a first thread part (701) in which a helical groove (706) is provided in equal intervals at a first pitch Pa, and a second thread part (702) in which the helical groove (706) is provided in equal intervals at a second pitch Pb, the helical groove (706) not being formed in a boundary part (703) sandwiched between the first thread part (701) and the second thread part (702). A first carriage (71) has a first engaging part (716a) that engages with the helical groove (706), and a second engaging part (717a) that engages with the helical groove (706) at a position distanced from the first engaging part (716a) in the axial direction. The first engaging part (716a) and the second engaging part (717a) are able to move relative to each other in the axial direction, and are not able to rotate relative to each other about an axis (L4). The first pitch Pa, the second pitch Pb, and the axial-directional dimension L0 of the boundary part (703) satisfy the formula [L0 = Pa = n × Pb], where n is a positive integer.

Description

Drive device

The present invention relates to a drive device having a linear drive mechanism having a feed screw and a carriage.

As a drive device provided with a linear drive mechanism, for example, a device has been proposed in which the drive force of a motor is transmitted to a feed screw to cause the carriage to move linearly and to move the carriage directly (see Patent Document 1). In such a device, if the pitch of the spiral groove formed on the outer peripheral surface of the feed screw is made different for each region, the carriage feed speed can be switched without changing the rotation speed of the feed screw. For example, Patent Literature 1 includes a first screw portion in which spiral grooves are provided at a first pitch, and a second screw portion in which spiral grooves are provided at a second pitch shorter than the first pitch. In the boundary portion between the first screw portion and the second screw portion, the groove interval continuously changes in the circumferential direction.

JP-A-6-123345

In order to manufacture the feed screw described in Patent Document 1, for example, expensive processing equipment such as a machining center equipped with a 5-axis rotation mechanism is required. Moreover, in order to manufacture the feed screw described in Patent Document 1, it takes a long processing time and the manufacturing efficiency is poor. For this reason, there is a problem that the feed screw becomes expensive.

In view of the above problems, an object of the present invention is to provide a drive device using a feed screw that can be efficiently manufactured.

In order to solve the above problems, a drive device according to the present invention includes a linear drive mechanism including a carriage and a feed screw in which a spiral groove that engages with the carriage is formed on an outer peripheral surface. The spiral groove is provided at a first pitch and the first screw portion is spaced apart from the first screw portion in the axial direction, and the spiral groove is provided at a second pitch shorter than the first pitch. It has two screw parts, and the boundary part which is pinched | interposed into the said 1st screw part and the said 2nd screw part in the said axial direction, and the said spiral groove is not formed, It is characterized by the above-mentioned.

In the present invention, the period during which the carriage is engaged with the first threaded portion can be moved faster than the period during which the first carriage is engaged with the second threaded portion. Further, during the period in which the first carriage is engaged with the second screw portion, the first carriage and the second screw portion are in a self-locking state with the rotation of the feed screw being stopped. Therefore, it is possible to prevent the first carriage from moving carelessly. Moreover, the spiral groove is not formed in the boundary part pinched by the 1st screw part and the 2nd screw part, and it is not the structure where the space | interval of a groove | channel changes continuously in the circumferential direction. Therefore, the spiral grooves may be formed at equal intervals at the first pitch in the first screw portion, and the spiral grooves may be formed at equal intervals at the second pitch in the second screw portion. For this reason, since a feed screw can be efficiently manufactured using dies etc., the cost of a feed screw and the cost of a drive device can be reduced.

In the present invention, it is preferable that the first screw portion and the second screw portion have the same outer diameter, and the outer diameter of the boundary portion is smaller than the outer diameter of the first screw portion and the second screw portion. . According to this configuration, the boundary portion does not hinder the movement of the carriage.

In the present invention, the carriage engages with the spiral groove at a position that is spaced apart in the axial direction with respect to the first engagement portion, and a first engagement portion that engages with the spiral groove, A second engagement portion that is relatively movable in the axial direction with respect to the engagement portion and is not rotatable relative to the first engagement portion about the axis, wherein n is a positive integer, When 1 pitch is Pa, the second pitch is Pb, and the dimension of the boundary in the axial direction is L0,
n, Pa, Pb, and L0 are the following formulas L0 = Pa = n × Pb
Is preferably satisfied. According to such a configuration, the transition from the state in which the first engagement portion and the second engagement portion are engaged with the first screw portion to the state in which the first engagement portion and the second engagement portion are engaged with the second screw portion, and the transition in the opposite direction are performed. Smooth.

In the present invention, the carriage includes a first engagement member provided with the first engagement portion, a second engagement member provided with the second engagement portion, the first engagement member, and the An embodiment having a carriage holder that supports the second engagement member so as to be relatively movable in the axial direction, and a coil spring disposed between the first engagement member and the second engagement member is employed. be able to.

In the present invention, it is preferable that the feed screw has the second screw portion on both sides in the axial direction with respect to the first screw portion. According to such a configuration, the driven member can be moved at a low speed in the initial stage and the final stage of the movement operation of the driven member, and the driven member can be moved at a high speed in the intermediate section.

In the present invention, it is possible to adopt a mode having a drive source that rotates the feed screw around an axis, and a driven member that is driven to one side and the other side in the first direction by the carriage.

In the present invention, the linear drive mechanism includes a switching mechanism that switches a mechanical connection between the driven member and the carriage, and the switching mechanism moves the carriage to one side in the first direction. At the start, the mechanical connection between the driven member and the carriage is released, and after the carriage has moved a certain distance in one side of the first direction, the driven member and the carriage It is preferable to be in a connected state in which the carriage is mechanically connected. According to such a configuration, even when the carriage starts to move, the switching mechanism is in a released state in which the mechanical connection between the driven member and the carriage is released, so that the driven member is in the first direction. Does not move to one side. In addition, when the carriage moves a certain distance in one direction in the first direction and the switching mechanism is in a connection state where the driven member and the carriage are mechanically connected, the driven member and the carriage become the first. Move to one side of the direction. Therefore, the timing at which the driven member moves linearly after the drive source starts operating can be set appropriately.

In the present invention, a frame having an opening that opens toward one side in the first direction, an opening / closing member that closes the opening, and the opening / closing member that is driven by a driving force of the drive source to drive the opening. An open / close mechanism that opens and closes the drive member, and the linear drive mechanism projects the driven member outward from the opening by moving the driven member linearly in one side and the other side in the first direction. A mode of moving between the appearance position and the standby position retracted inward from the opening can be adopted.

In the present invention, the driving source is a motor, and the motor includes a first output shaft and a second output shaft protruding toward opposite sides, and the driving force output from the first output shaft It is preferable that the opening / closing mechanism operates and the linear driving mechanism operates by the driving force output from the second output shaft. According to such a configuration, a mechanism for branching and transmitting the output of the motor to the linear drive mechanism and the opening / closing mechanism is unnecessary.

In the present invention, as the driven member moves to one side in the first direction, the tip end side of the driven member is tilted to one side or the other side in the second direction intersecting the first direction. It is preferable to have a tilt drive mechanism. According to such a configuration, the driven member can be taken in and out through the opening and the posture of the driven member can be adjusted with a simple configuration using one driving source.

In the present invention, the linear drive mechanism includes a guide member that regulates an attitude of the driven member until the driven member moves from the standby position toward the appearance position, and the tilt driving mechanism includes the tilt driving mechanism, An abutting portion that abuts the driven member on one side or the other side in the second direction to tilt the driven member when the driven portion moves to a position where the restriction of the posture by the guide member is released. It is preferable to have. According to such a configuration, when the driven member comes into contact with the contact portion, the tip side of the driven member is tilted in the second direction, and therefore, the posture of the driven member is switched using the direct movement of the driven member. Can do. Further, when the driven member is tilted, the driven member can be adjusted in posture, for example, the driven member can be largely tilted if the distance of linear movement is long. According to such a configuration, the posture of the driven member can be switched with a relatively simple configuration.

In the present invention, it is possible to adopt an aspect in which the driven member is a display member that displays an image.

It is the perspective view which looked at the compound drive device to which the present invention is applied from the front side (the other side in the second direction) of the driven member. It is the perspective view which looked at the compound drive device to which the present invention is applied from the back side (one side of the 2nd direction) of a driven member. It is the perspective view which looked at the opening / closing mechanism of the compound drive device to which the present invention is applied, the linear drive mechanism, etc. from one side of the 3rd direction. It is the perspective view which looked at the opening / closing mechanism of the compound drive device to which the present invention is applied from one side in the third direction. It is a disassembled perspective view of the opening / closing member etc. of the compound drive device to which the present invention is applied. It is explanatory drawing of the pinion etc. which were used for the opening / closing mechanism of the composite drive device to which this invention is applied. It is explanatory drawing which shows operation | movement of the opening / closing mechanism of the compound drive device to which this invention is applied. It is the perspective view which looked at the linear drive mechanism and tilt drive mechanism of the composite drive device to which this invention is applied from the one side of the 3rd direction. It is a disassembled perspective view of the linear drive mechanism of the composite drive device to which this invention is applied. It is explanatory drawing of the switching mechanism and tilt drive mechanism of the composite drive device to which this invention is applied. It is explanatory drawing which shows operation | movement of the switching mechanism of the composite drive device to which this invention is applied. It is explanatory drawing which shows operation | movement of the tilt drive mechanism of the composite drive device to which this invention is applied. It is explanatory drawing of the feed screw of the compound drive device to which this invention is applied. It is explanatory drawing of the 1st carriage of the compound drive device to which this invention is applied. It is explanatory drawing which shows the relationship of the dimension of each site | part of the feed screw shown in FIG. It is explanatory drawing which shows an example of the method of forming the 1st screw part and the 2nd screw part which are shown in FIG. It is a timing chart which shows operation | movement of the compound drive device to which this invention is applied.

Embodiments for carrying out the present invention will be described with reference to the drawings. In the following description, a direction along the linear movement direction of the driven member is defined as a first direction Y, and two directions intersecting the first direction Y are defined as a second direction Z and a third direction X, respectively. The direction in which the opening / closing member slides is defined as a second direction Z. Y1 is attached to one side of the first direction Y, Y2 is attached to the other side, Z1 is attached to one side of the second direction Z, Z2 is attached to the other side, and the third direction X In the following description, X1 is attached to one side of the X and X2 is attached to the other side.

Further, the driving device of the present embodiment is a composite driving device that performs opening / closing operation of the opening by the opening / closing member and taking in and out of the display member (driven member) through the opening. In such a composite drive device, the first direction Y is the vertical direction, the second direction Z is the front-rear direction, and the third direction X is the lateral direction.

(overall structure)
FIG. 1 is a perspective view of a composite drive device 1 to which the present invention is applied as viewed from the front side of the driven member 3 (the other side Z2 in the second direction Z). FIGS. 1 (a) and 1 (b) FIG. 5 is an explanatory diagram of a state where the driving member 3 is at a standby position inside the frame 2 and an explanatory diagram of a state where the driven member 3 is at an appearance position outside the frame 2. FIG. 2 is a perspective view of the composite drive device 1 to which the present invention is applied as seen from the back side (one side Z1 in the second direction Z) of the driven member 3, and FIGS. FIG. 3 is an explanatory diagram of a state where the driven member 3 is in a standby position inside the frame 2 and an explanatory diagram of a state where the driven member 3 is in an appearance position outside the frame 2. FIG. 3 is a perspective view of the opening / closing mechanism 6 and the linear drive mechanism 7 of the composite drive device 1 to which the present invention is applied as viewed from one side X1 in the third direction X. In FIGS. 1 and 2, only the outline of the frame 2 is schematically shown so that the internal configuration of the frame 2 can be easily understood.

1 and 2 includes a frame 2 having an opening 20 that opens toward one side Y1 in a first direction Y, a driven member 3 disposed inside the frame 2, And an opening / closing member 4 that closes the opening 20. The frame 2 has a square box shape. The driven member 3 is a display member 30 that displays an image toward the one side Z1 or the other side Z2 in the second direction Z. The display member 30 is configured as a display panel of a direct-view display device or a virtual image display device, for example. In this embodiment, the display member 30 displays an image toward the other side Z2 in the second direction Z.

As shown in FIGS. 1, 2, and 3, the composite drive device 1 includes a motor 50 as a drive source 5 and an opening / closing mechanism 6 that opens and closes the opening 20 by driving the opening / closing member 4 with the driving force of the motor 50. And a linear drive mechanism 7 that linearly moves the driven member 3 to the one side Y1 and the other side Y2 in the first direction Y by the driving force of the motor 50. The motor 50 can output bidirectional rotation. As will be described later, the opening / closing mechanism 6 slides the opening / closing member 4 along the second direction Z from the position where the opening 20 is closed to open the opening 20 on one side Z1 in the second direction Z with respect to the opening / closing member 4. Is opened. As will be described later, the linear drive mechanism 7 retracts the driven member 3 outward from the opening 20 (see FIG. 1B and FIG. 2B) and retracts inward from the opening 20. It is moved between the standby positions (see FIG. 1 (a) and FIG. 2 (a)).

(Configuration of opening and closing mechanism)
FIG. 4 is a perspective view of the opening / closing mechanism 6 of the composite drive device 1 to which the present invention is applied as viewed from one side X1 in the third direction X. FIG. FIG. 5 is an exploded perspective view of the opening / closing member 4 and the like of the composite drive device 1 to which the present invention is applied. FIG. 6 is an explanatory diagram of the pinion 62 and the like used in the opening / closing mechanism 6 of the composite drive device 1 to which the present invention is applied. 3, 4, 5, and 6, only the teeth of the first rack 410 and a part of the teeth of the second rack 420 are shown, and the range in which the first rack 410 and the second rack 420 are formed. Is indicated by a one-dot chain line.

As shown in FIGS. 4, 5, and 6, the opening / closing member 4 includes a first member 41 and a second member 42, and the opening / closing mechanism 6 uses the first member 41 and the second member 42 as the second member. The holder 61 is supported so as to be movable in the direction Z. Each of the first member 41 and the second member 42 is a plate-like member that faces the thickness direction in the first direction. The holder 61 has a pair of

side plate portions

611 and 612 that face each other in the third direction X, and a connecting plate portion 619 that is connected to an end portion of the

side plate portions

611 and 612 on one side Z1 in the second direction Z.

The end portions on both sides of the side plate portion 611 in the first direction Y are bent toward the side plate portion 612 to form

support plate portions

611a and 611b extending in the second direction Z, and the side plate portion 612 in the first direction Y The end portions on both sides are bent to the side plate portion 611 side and constitute

support plate portions

612a and 612b extending in the second direction Z. In the side plate portion 611, a hole 611c extending in the second direction Z is formed on one side Z1 in the second direction Z. From the edge of the one side Y1 in the first direction Y of the hole 611c, the side plate portion 612 is formed. A support plate portion 611d that is bent toward is formed. In the side plate portion 612, a hole 612c extending in the second direction Z is formed on one side Z1 in the second direction Z. From the edge of the one side Y1 in the first direction Y of the hole 612c, the side plate portion 611 is formed. A support plate portion 612d that is bent toward is formed.

Therefore, the second member 42 is supported such that both end portions in the third direction X are movable in the second direction Z between the

support plate portions

611a and 612a and the

support plate portions

611d and 612d. The first member 41 is disposed such that both end portions in the third direction X are movable in the second direction Z between the

support plate portions

611a and 612a and the

support plate portions

611b and 612b.

The holder 61 configured as described above is supported by the frame 2 so as to be rotatable around the first axis L1 extending in the third direction X at the end of the one side Z1 in the second direction Z. The opening / closing mechanism 6 includes a pinion 62 supported on the

side plate portions

611 and 612 of the holder 61 so as to be rotatable around the second axis L2 extending in the third direction X, and the first direction Y from the first axis L1. And a rotating member 66 that rotates around the third axis L3 extending in the third direction X at a position separated from the other side Y2 and the other direction Z2 of the second direction Z. In this embodiment, a pair of the pinion 62 and the rotating member 66 are provided apart from each other in the third direction X.

The holder 61 is formed with a first slit 613 extending in the second direction Z in each of the

side plate portions

611 and 612 facing each other in the third direction X. The first slit 613 includes a first portion 613a extending in the second direction Z and an end portion on the other side Z2 in the second direction Z of the first portion 613a obliquely toward one side Y1 in the first direction Y. The second portion 613b extends.

A support shaft 63 that rotatably supports the pinion 62 is fitted in the first slit 613, and the support shaft 63 is movable in the second direction Z along the first slit 613. Accordingly, the pinion 62 is supported by the holder 61 so as to be movable in the second direction Z.

The rotating member 66 is an arm that extends from a position through which the third axis L3 passes to the side surface 411 of the first member 41. The rotating member 66 extends along the extending direction of the rotating member 66 on the distal end side of the rotating member 66. A long hole 661 is formed. The holder 61 is formed with a second slit 614 extending in the second direction Z in each of the

side plate portions

611 and 612, and the shaft 442 provided on the side surface 411 of the first member 41 is the second slit 614. Is inserted into the long hole 661. Therefore, the shaft 442 and the long hole 661 constitute a connecting portion 60 that connects the rotating member 66 and the first member 41 to each other in a rotatable manner. Here, the second slit 614 extends from the end of the first portion 614a extending in the second direction Z and the other side Z2 of the first portion 614a to the one side Y1 of the first direction Y. And a second portion 614b extending obliquely.

The two rotating members 66 facing each other in the third direction X are connected by a connecting shaft 662 and rotate integrally. Of the two rotating members 66, the rotating member 66 on one side X 1 in the third direction X and the drive source 5 (motor 50) are mechanically connected via a transmission mechanism 67. In this embodiment, the transmission mechanism 67 includes a gear transmission mechanism 68 and a belt transmission mechanism 69.

The motor 50 is fixed to the frame 2 with the motor axis directed in the direction along the first direction Y, the first output shaft 51 protruding to one side Y1 in the first direction Y, and the other side Y2 in the first direction. And a second output shaft 52 projecting from the top (see FIG. 4). The gear transmission mechanism 68 includes a first gear 681, a second gear 682, a third gear 683, and a fourth gear 684 made of a worm fixed to the first output shaft 51. The second gear 682 is a composite gear in which a worm wheel 682a meshing with the first gear 681 and a gear 682b having a smaller diameter than the worm wheel 682a are integrally formed. The third gear 683 is a composite gear in which a gear 683a meshing with the gear 682 and a gear 683b provided with teeth only in a predetermined angular range in the circumferential direction are integrally formed. The fourth gear 684 is a compound gear in which a gear 684a meshing with the gear 683b and a pulley 684b are integrally formed.

Among the two rotating members 66, a pulley 692 is connected to the rotating member 66 on one side X1 in the third direction X. A belt 691 is hung on the

pulleys

684b and 692, and a belt transmission mechanism 69 is configured by the

pulleys

684b and 692 and the belt 691.

(Detailed configuration of the opening / closing member 4)
In the first member 41, a step portion 412 facing the one side Y1 in the first direction Y is formed on the side surface 411. In the step portion 412, the first portion 41 extends from the end portion facing the one side Z1 in the second direction Z. The first rack 410 is continuously provided up to a middle position on the surface facing the one side Y1 in the one direction Y. In the second member 42, a step portion 422 facing the other side Y2 in the first direction Y is formed on the side surface 421, and the step portion 422 is formed from the end portion facing the other side Z2 in the second direction Z. The second rack 420 is continuously provided up to a middle position on the surface facing the other side Y2 in the one direction Y. The first rack 410 and the second rack 420 are engaged with the pinion 62 from opposite sides.

(Open / close operation)
FIG. 7 is an explanatory diagram showing the operation of the opening / closing mechanism 6 of the composite drive device 1 to which the present invention is applied. In FIG. 7, the position of the opening / closing member 4 or the like in the closed state is indicated by a solid line, and the position of the opening / closing member 4 or the like in the opened state is indicated by a one-dot chain line.

As shown in FIG. 7, in the closed state in which the opening 20 of the frame 2 is closed by the opening / closing member 4, the arm-shaped rotating member 66 is standing up toward one side Y1 in the first direction Y. In the state, in the opening / closing member 4, the first member 41 is aligned with the second member 42 on the other side Z 2 in the second direction Z. In the closed state, the pinion 62 is positioned in the second portion 613b of the first slit 613. In addition, the pinion 62 is between the first member 41 and the second member 42 in the second direction Z. Therefore, a portion of the first rack 410 that is formed at an end portion of the step 412 that faces the one side Z1 in the second direction Z meshes with the pinion 62 from the other side Z2 in the second direction Z. Of the step portion 422, a portion formed at an end portion facing the other side Z 2 in the second direction Z is engaged with the pinion 62 from the one side Z 1 in the second direction Z.

When the motor 50 rotates in one direction from this state, the rotational driving force of the motor 50 is transmitted to the rotating member 66 via the transmission mechanism 67 (gear transmission mechanism 68 and belt transmission mechanism 69) shown in FIG. Accordingly, the rotating member 66 rotates around the third axis L3 in one direction indicated by the arrow C, and the connecting portion 60 between the rotating member 66 and the first member 41 extends around the third axis L3 in one direction indicated by the arrow C. Rotate. For this reason, the shaft 442 of the connecting portion 60 moves along the second slit 614 in a direction approaching the first axis L1. Therefore, the first member 41 moves in the direction approaching the first axis L1 as indicated by the arrow A1 while being supported by the holder 61. As a result, the holder 61 rotates in the direction indicated by the arrow B around the first axis L1. At that time, the pinion 62 rides on the first rack 410 while rotating around the second axis L2, and the meshing position of the pinion 62 and the first rack 410 moves to the other side Z2 of the first rack 410 in the second direction Z. To do. Further, the rotation of the pinion 62 causes the second rack 420 to ride on the pinion 62 on the side opposite to the first rack 410, and the meshing position of the pinion 62 and the second rack 420 is in the second direction Z of the second rack 420. Move to one side Z1. Therefore, the second member 42 moves to the other side Z2 in the second direction Z, as indicated by the arrow A2, and overlaps the one side Y1 in the first direction Y with respect to the first member 41 with the pinion 62 interposed therebetween. In such a state, the first member 41 and the second member 42 are in an oblique posture in which the

end portions

41 a and 42 a on the other side Z 2 in the second direction Z are drawn into the frame 2. Further, at least one side Z1 in the second direction Z of the second member 42 (one side Z1 in the second direction Z of the opening / closing member 4) is in an open state in which the opening 20 is opened. In this embodiment, the opening of the frame 2 is also open on the other side Z1 of the opening / closing member 4 in the second direction Z, but the opening is not used for taking in and out the driven member 3.

When the motor 50 rotates in the other direction from the open state, the rotational driving force of the motor 50 is transmitted to the rotating member 66 via the transmission mechanism 67 (the gear transmission mechanism 68 and the belt transmission mechanism 69) of the opening / closing mechanism 6. The rotation member 66 rotates around the third axis L3 in the other direction opposite to the one direction indicated by the arrow C, and the connecting portion 60 between the rotation member 66 and the first member 41 moves around the third axis L3. It rotates in the other direction opposite to the one direction indicated by C. For this reason, the connecting portion 60 moves along the second slit 614 in a direction away from the first axis L1. Therefore, as a result of the operation on the opposite side to the above operation being performed, the second member 42 moves to the one side Z1 in the second direction Z. Therefore, the one side Z1 in the second direction Z of the second member 42 (opening / closing member) 4 in one side Z1) in the second direction Z, the opening 20 is closed by the opening / closing member 4.

(Configuration of the driven member 3)
FIG. 8 is a perspective view of the linear drive mechanism 7 and the tilt drive mechanism 9 of the composite drive apparatus 1 to which the present invention is applied as viewed from one side X1 in the third direction X. FIG. 9 is an exploded perspective view of the linear drive mechanism 7 of the composite drive device 1 to which the present invention is applied.

As shown in FIGS. 3, 8, and 9, the driven member 3 includes a main body 31 that protrudes from the frame 2 when the driven member 3 moves to the appearance position, and a first direction Y of the main body 31. And a base 32 that holds the end of the other side Y2. The main body 31 has a panel shape with the thickness direction directed in the second direction Z. The base 32 has a dimension in the third direction X larger than that of the main body 31, and a dimension in the second direction Z larger than that of the main body 31.

(Configuration of linear drive mechanism 7)
The linear drive mechanism 7 includes a feed screw 70 that rotates around an axis L4 extending in the first direction Y, and a first carriage 71 that engages with the feed screw 70. When the drive member 3 is moved from the standby position to the appearance position, the drive member 3 moves to one side Y1 in the first direction Y. In this embodiment, both end portions of the feed screw 70 are rotatably supported by support members 78 supported by the frame 2. The linear drive mechanism 7 includes a gear transmission mechanism including a first gear 751 fixed to the second output shaft 52 of the motor 50, a second gear 752 that meshes with the first gear 751, and a third gear 753 that meshes with the second gear 752. 75, and the third gear 753 is fixed to the end 709 of the feed screw 70. Accordingly, the feed screw 70 rotates around the axis L4 by the driving force of the motor 50.

The linear drive mechanism 7 has a guide member 74 that regulates the attitude of the driven member 3 until the driven member 3 moves from the standby position toward the appearance position. In this embodiment, the guide member 74 has a pair of plate-shaped guide portions that face each other in the second direction Z, and the driven member 3 is disposed between the pair of guide portions. For this reason, of the pair of guide portions, the first guide portion 741 located on the other side Z2 in the second direction Z contacts the driven member 3 from the other side Z2 in the second direction Z, and one of the second directions Z The second guide portion 742 located on the side Z1 contacts the driven member 3 from one side Z1 in the second direction Z.

In this embodiment, the guide member 74 has a first side Y1 in the first direction Y of the first guide part 741 and a tip side inclined to the other side Z2 in the second direction Z (the side opposite to the second guide part 742). A support portion 741a, and a second support portion 742a whose tip side is inclined to one side Z1 in the second direction Z on the one side Y1 in the first direction Y of the second guide portion 742 (opposite side to the first guide portion 741). have.

The linear drive mechanism 7 has a guide shaft 77 extending in the first direction Y, and the guide shaft 77 is supported by the frame 2 via a support member 79. The linear drive mechanism 7 has a second carriage 72 in which a guide hole 725 through which the guide shaft 77 passes is formed. The second carriage 72 includes a cylindrical portion 721 in which a guide hole 725 is formed, and an L-shaped connecting plate portion 722 that overlaps from the cylindrical portion 721 to the base 32 of the driven member 3 from the other side X2 in the third direction X. Have. A circular hole 723 is formed in the connecting plate portion 722, and a round bar-shaped shaft portion (not shown) protruding from the base 32 of the driven member 3 to the other side X 2 in the third direction X is formed in the hole 723. Is inserted.

Accordingly, the second carriage 72 and the driven member 3 can move together in the first direction Y, and the driven member 3 is around the axis L5 passing through the center of the shaft portion with respect to the second carriage 72. Can be rotated. Here, between the driven member 3 and the second carriage 72, as shown by an arrow S, an urging member that urges the driven member 3 to one side around the axis L5 with respect to the second carriage 72. 76 (second urging member) is provided. In this embodiment, the urging member 76 is a torsion coil spring 760, and both ends are held by the driven member 3 and the second carriage 72, respectively. The biasing member 76 generates a biasing force in a direction in which the driven member 3 is brought into contact with the contact portion 90 in the tilt driving mechanism 9 described later.

(Switching mechanism 8)
FIG. 10 is an explanatory diagram of the switching mechanism 8 and the tilt drive mechanism 9 of the composite drive apparatus 1 to which the present invention is applied. In this embodiment, the linear drive mechanism 7 has a switching mechanism 8. The switching mechanism 8 is in a released state in which the mechanical connection between the driven member 3 and the first carriage 71 is released when the first carriage 71 starts moving to the one side Y1 in the first direction Y. After the first carriage 71 moves a certain distance Y1 in the first direction Y, the driven member 3 and the first carriage 71 are mechanically connected.

In the present embodiment, the switching mechanism 8 is configured to move the first carriage 71 in the first direction Y and the lever 81 supported so as to be rotatable around the axis L6 extending in the third direction X with respect to the first carriage 71. Along with this, there is provided a cam mechanism 85 that switches the posture of the lever 81 to realize a released state and a connected state.

In the present embodiment, the first carriage 72 has an L-shape that is engaged with the feed screw 70 and overlaps from the engagement portion 711 to the base 32 of the driven member 3 from one side X1 in the third direction X. The connecting plate portion 712 includes a protruding portion 713 protruding from the end portion on the one side Z1 in the second direction Z of the connecting plate portion 712 to the one side Y1 in the first direction Y. The connecting plate portion 712 has a circular hole (not shown) at a position where the axis L6 passes, and the lever 81 also has a circular hole 816 at a position where the axis L6 passes. A round bar-shaped shaft portion 86 is fitted in the hole of the connecting plate portion 712 and the hole 816 of the lever 81. Accordingly, the first carriage 71 and the lever 81 can move together in the first direction Y, and the lever 81 can rotate around the axis L6 passing through the center of the shaft portion 86 with respect to the first carriage 71. It is. A biasing member that biases the lever 81 about the axis L6 as shown by an arrow F2 between the lever 81 and the first carriage 71 as shown by an arrow F2. 88 (second urging member) is provided. In this embodiment, the biasing member 88 is a torsion coil spring 880.

The lever 81 extends from the position where the hole 816 is formed to the other side Y2 in the first direction Y, and from the position where the hole 816 is formed to the one side Y1 in the first direction Y. The second plate portion 812 extends. While the edge of the first plate portion 811 is a cam surface 84, a round bar-like cam pin 82 is fixed to the frame 2 in the vicinity of the cam surface 84. In this embodiment, the cam surface 84 and the cam pin 82 constitute a cam mechanism 85 that regulates the posture of the lever 81 around the axis L6.

The second plate portion 812 of the lever 81 is formed with a notch-shaped recess 813 that is recessed from the edge on the one side Z1 in the second direction Z to the other side Z2 at a position facing the projection 713 of the first carriage 72. Has been. Accordingly, the second plate portion 812 of the lever 81 has a first abutting portion 814 formed of an edge on the other side Y2 of the concave portion 813 in the first direction Y and an edge on the one side Y1 of the concave portion 813 in the first direction Y. The second contact portion 815 is formed. Further, a round bar-shaped engagement shaft 34 projects from the base 32 of the driven member 3 on one side X1 in the third direction X.

(Operation of switching mechanism 8)
FIG. 11 is an explanatory diagram showing the operation of the switching mechanism 8 of the composite drive device 1 to which the present invention is applied. FIG. 11 shows a state in which the posture of the lever 81 is switched as the first carriage 71 moves to one side Y1 in the first direction Y, as indicated by arrows E1 and E2.

First, at a time t1 shown in FIG. 11, when the driven member 3 is in the standby position, the first carriage 71 and the lever 81 are on the other side Y2 in the first direction Y with respect to the engagement shaft 34 of the driven member 3. The lever 81 and the engagement shaft 34 are not engaged. Therefore, the mechanical connection between the driven member 3 and the first carriage 71 is released.

Next, when the motor 50 rotates in one direction and the feed screw 70 rotates in one direction at time t11 shown in FIG. 11, the first carriage 71 moves in one direction in the first direction Y as indicated by an arrow E1. Move to Y1. As a result, the cam surface 84 of the lever 81 is pressed by the cam pin 82, and the lever 81 rotates in one direction around the axis L6 and assumes an oblique posture as indicated by an arrow F1.

Furthermore, when the first carriage 71 moves to one side Y1 in the first direction Y at time t12 shown in FIG. 11, the lever 81 is gradually released from the posture restriction by the cam pin 82, and the biasing force of the biasing member 88 is increased. Thus, as shown by the arrow F2, it starts to rotate around the axis L6 in the other direction. Then, at time t2 shown in FIG. 11, as indicated by an arrow F2, the lever 81 further rotates around the axis L6 in the other direction, and the engagement shaft 34 enters the inside of the recess 813 from the open end side of the recess 813. . As a result, the first contact portion 814 is positioned on the other side Y2 in the first direction Y with respect to the engagement shaft 34, and the second contact portion is on the one side Y1 in the first direction Y with respect to the engagement shaft 34. 815 is positioned, and the lever 81 and the driven member 3 are engaged on both the one side Y1 and the other side Y2 in the first direction Y. Such a state is a connection state in which the driven member 3 and the first carriage 71 are mechanically connected and can move integrally. In this connected state, when the first carriage 71 further moves to the one side Y1 in the first direction Y, the engagement shaft 34 is pressed to the one side Y1 in the first direction Y by the first contact portion 814 of the lever 81. Therefore, the driven member 3 moves together with the first carriage 71 to one side Y1 in the first direction Y and emerges from the opening 20 of the frame 2. In this state, the open end side of the concave portion 813 of the lever 81 is closed by the convex portion 713 of the first carriage 71. Accordingly, the convex portion 713 functions as a convex portion for preventing the engagement shaft 34 from coming off from the concave portion 813 of the lever 81.

Contrary to the above operation, when the motor 50 rotates in the other direction, the first carriage 71 moves to the other side Y2 in the first direction Y as indicated by an arrow E2. As a result, the engagement shaft 34 of the driven member 3 is pressed against the other side Y2 in the first direction Y by the second abutting portion 815 of the lever 81, so that the driven member 3 together with the first carriage 71 is It moves to the other side Y2 of the first direction Y and returns to the inside of the frame 2 from the opening 20 of the frame 2. In the middle, the posture of the lever 81 is switched by the cam mechanism 85, and the connection between the driven member 3 and the first carriage 71 is released.

(Configuration of tilt drive mechanism 9)
FIG. 12 is an explanatory diagram showing the operation of the tilt drive mechanism 9 of the composite drive device 1 to which the present invention is applied. As shown in FIG. 8 and the like, a shaft 91 is disposed in the vicinity of the end portion on one side Z1 in the first direction Y of the guide member 74, and the shaft 91 is fixed to the frame 2. In this embodiment, the shaft 91 is driven by the tilt drive mechanism 9 that tilts the distal end side of the driven member 3 that has reached the appearance position toward the one side Z1 or the other side Z2 in the second direction Z by the driving force of the driving source 5. It functions as the contact portion 90. In this embodiment, since the attitude of the driven member 3 is regulated by the guide member 74, the tilt drive mechanism 9 is moved after the regulation of the attitude of the driven member 3 by the guide member 74 is released at the appearance position. The front end side of the drive member 3 is tilted in the second direction Z.

In this embodiment, the shaft 91 is disposed on the other side Z2 of the guide member 74 in the second direction Z. Further, the base 32 of the driven member 3 is provided with an interference portion 33 that protrudes from the main body portion 31 to the other side Z2 in the second direction Z. Accordingly, as will be described below with reference to FIG. 12, when the interference portion 33 contacts the contact portion 90 from the other side Y2 in the first direction Y, the distal end side of the driven member 3 is around the axis L5. To the other side Z2 in the second direction Z.

As shown in FIG. 12, the driven member 3 is supported so that the base 32 can swing around the axis L 5 with respect to the first carriage 71 and the second carriage 72. Further, the urging member 76 described with reference to FIG. 10 urges the driven member 3 in the direction indicated by the arrow S around the axis L5. Accordingly, as shown by a one-dot chain line in FIG. 12, the tip side of the driven member 3 tends to tilt toward the one side Z1 in the second direction Z around the axis L5. As shown by a solid line in FIG.

Then, when the driven member 3 moves to one side Y1 in the first direction Y and the restriction of the posture of the driven member 3 by the guide member 74 is released as indicated by an arrow E1, a dashed line in FIG. As shown, the tip side of the driven member 3 is first inclined to one side Z1 in the second direction Z around the axis L5.

Then, when the driven member 3 further moves to one side Y1 in the first direction Y, the interference part 33 comes into contact with the contact part 90 from the other side Y2 in the first direction Y, and the driven member 3 is shown in FIG. After passing through the posture indicated by the solid line, as shown by the dotted line in FIG. 12, the distal end side of the driven member 3 is inclined to the other side Z2 in the second direction Z around the axis L5. Here, since the urging member 76 urges the driven member 3 in the direction in which the interference portion 33 abuts against the abutting portion 90, the distal end side of the driven member 3 is the urging force of the urging member 76. Against the other side Z2 in the second direction Z. In this embodiment, when the driven member 3 is tilted, the driven member 3 can be easily adjusted in posture, for example, if the linear movement distance is long, the driven member 3 can be largely tilted. Even in this case, since the position of the driven member 3 in the first direction Y does not change greatly, the change in the position of the driven member 3 in the first direction Y can be ignored. Instead of the urging member 76, an urging member that urges the interference portion 33 of the driven member 3 in the direction in which it abuts on the abutting portion 90 is provided between the first carriage 71 and the driven member 3. May be.

(Configuration of feed screw 70)
FIG. 13 is an explanatory diagram of the feed screw 70 of the composite drive device 1 to which the present invention is applied. FIG. 14 is an explanatory diagram of the first carriage 71 of the composite drive device 1 to which the present invention is applied. FIGS. 14 (a) and 14 (b), a perspective view of the first carriage 71, and a cross-sectional view of the first carriage 71. It is. FIG. 15 is an explanatory diagram showing the relationship of the dimensions of each part of the feed screw 70 shown in FIG.

As shown in FIG. 13, the feed screw 70 used in the linear drive mechanism 7 has a spiral groove 706 formed on the outer peripheral surface of a round rod-like shaft body 705. In this embodiment, the feed screw 70 includes a first screw portion 701 in which a spiral groove 706 is provided at a first pitch Pa, and a second screw portion 702 in which the spiral groove 706 is provided at a second pitch Pb. The first screw portion 701 and the second screw portion 702 are separated from each other in the axial direction (extending direction of the axis L4). Here, the second pitch Pb is shorter than the first pitch Pa. Therefore, the lead angle of the spiral groove 706 is larger in the first screw portion 701 than in the second screw portion 702.

In the feed screw 70 configured as described above, the spiral groove 706 is not formed in the boundary portion 703 sandwiched between the first screw portion 701 and the second screw portion 702 in the axial direction. The first screw portion 701 and the second screw portion 702 have the same outer diameter, and the outer diameter of the boundary portion 703 is smaller than the outer diameter of the first screw portion 701 and the second screw portion 702.

As shown in FIGS. 14 and 15, in the first carriage 71, the engaging portion 711 that engages with the feed screw 70 includes a first engaging portion 716a that engages with the spiral groove 706, and a first engaging portion 716a. And a second engaging portion 717a that engages with the spiral groove 706 at a position spaced apart in the axial direction. Here, the first engagement portion 716a and the second engagement portion 717a are relatively movable in the axial direction and are not relatively rotatable around the axis L4.

In this embodiment, the engaging portion 711 of the first carriage 71 includes a first engaging member 716 provided with a first engaging portion 716a and a second engaging member 717 provided with a second engaging portion 717a. The carriage holder 718 supports the first engagement member 716 and the second engagement member 717 so as to be relatively movable in the axial direction. The first engaging member 716 includes a cylindrical first tube portion 716b through which the feed screw 71 passes, and a first convex portion 716c protruding outward in the radial direction from the outer peripheral surface of the first tube portion 716b. . On the opposite side of the outer peripheral surface of the first cylindrical portion 716b from the first convex portion 716c, the first engagement portion 716a protrudes radially inward and engages with the spiral groove 706. The second engaging member 717 has a cylindrical second cylindrical portion 717b through which the feed screw 71 passes, and a second convex portion 717c protruding radially inward from the outer peripheral surface of the second cylindrical portion 717b. . On the opposite side of the outer peripheral surface of the second cylindrical portion 717b from the second convex portion 717c, the second engaging portion 717a protrudes radially outward and engages with the spiral groove 706. The carriage holder 718 includes a cylindrical first housing portion 718a that supports the first engagement member 716 inwardly so as to be movable in the axial direction, and a cylinder that supports the second engagement member 717 inwardly so as to be movable in the axial direction. And a second accommodating portion 718b. The first housing portion 718a is formed with a notch 718c into which the first convex portion 716c is fitted, and the second housing portion 718b is formed with a notch 718d into which the second convex portion 717c is fitted. Accordingly, the first engagement member 716 and the second engagement member 717 are supported by the carriage holder 718 so as to be movable in the axial direction, but cannot be rotated about the axis L4 by the carriage holder 718.

In the engaging portion 711 of the first carriage 71, a compressed coil spring 719 is disposed between the first engaging member 716 and the second engaging member 717. For this reason, the first engagement member 716 and the second engagement member 717 are urged away from each other, and each abuts against the bottom portion 718e of the first storage portion 718a and the bottom portion 718f of the second storage portion 718b. ing. In this embodiment, the concave portion 716g formed on the surface of the first engagement member 716 facing the second engagement member 717 and the surface of the second engagement member 717 facing the first engagement member 716 are formed. Both ends of the coil spring 719 are fitted and supported in the recess 717g.

In the linear drive mechanism 7 configured as described above, when n is a positive integer, the first pitch Pa, the second pitch Pb, and the dimension L0 in the axial direction of the boundary portion 703 are expressed by the following equation: L0 = Pa = n × Pb
Meet. Therefore, the end portion on the boundary portion 703 side of the spiral groove 706 (first spiral groove 706a) of the first screw portion 701 and the boundary portion 703 side of the spiral groove 706 (second spiral groove 706b) of the second screw portion 702. Are in phase with the end of the. Therefore, as described below, the transition from the state in which the first carriage 71 is engaged with the first screw portion 701 to the state in which the first carriage 71 is engaged with the second screw portion 702 and the transition in the opposite direction are smooth. It is.

(Operation of linear drive mechanism 7)
In the linear drive mechanism 7, the feed screw 70 rotates in one direction from the state where both the first engagement portion 716 a and the second engagement portion 717 a are engaged with the first spiral groove 706 a by the first screw portion 701. When the first carriage 71 moves in the direction indicated by the arrow Y3 in FIG. 15, first, the second engagement portion 717a reaches the boundary portion 703, and the engagement with the first spiral groove 706a is performed. Come off. Even in this case, the first engagement portion 716a is engaged with the first spiral groove 706a by the first screw portion 701. Therefore, the first carriage 71 moves in the direction indicated by the arrow Y3 in FIG. Even when the second engagement portion 717a reaches the boundary portion 703 and the engagement with the first spiral groove 706a is released, the second engagement portion 717a is moved to the second spiral groove 706b by the second screw portion 702. For this reason, the first carriage 71 moves in the direction indicated by the arrow Y3 in FIG. Then, both the first engagement portion 716a and the second engagement portion 717a are engaged with the second spiral groove 706b by the second screw portion 702, and the first carriage 71 is in the direction indicated by the arrow Y3 in FIG. Move to.

In contrast, from the state where both the first engagement portion 716a and the second engagement portion 717a are engaged with the second spiral groove 706b by the second screw portion 702, the feed screw 70 is rotated in the other direction. Thus, when the first carriage 71 moves in the direction indicated by the arrow Y4 in FIG. 15, first, the first engagement portion 716a reaches the boundary portion 703, and the engagement with the second spiral groove 706b is released. . Even in this case, the second engaging portion 717 a is engaged with the second spiral groove 706 b by the second screw portion 702. Therefore, the first carriage 71 moves in the direction indicated by the arrow Y4 in FIG. Even when the first engagement portion 716a reaches the boundary portion 703 and is disengaged from the second spiral groove 706b, the first engagement portion 716a is moved to the first spiral groove 706a by the first screw portion 701. Is engaged. Therefore, the first carriage 71 moves in the direction indicated by the arrow Y4 in FIG. Then, both the first engagement portion 716a and the second engagement portion 717a are engaged with the first spiral groove 706a by the first screw portion 701, and the first carriage 71 is in the direction indicated by the arrow Y4 in FIG. Move to.

Here, the lead angle of the spiral groove 706 is larger in the first screw portion 701 than in the second screw portion 702. Therefore, the first carriage 71 moves at a high speed while the first engagement portion 716a or the second engagement portion 717a is engaged with the first spiral groove 706a of the first screw portion 701. In contrast, the first carriage 71 moves at a low speed while the first engagement portion 716a or the second engagement portion 717a is engaged with the second spiral groove 706b of the second screw portion 702. Further, the feed screw 70 has second screw portions 702 on both sides in the first direction Y with respect to the first screw portion 701. The second screw portion 702 is a portion that drives the first carriage 71 at a low speed in the initial period and the final period when the driven member 3 is moved from the standby position to the appearance position, and the first screw portion 701 is driven This is a portion that drives the first carriage 71 at a high speed during an intermediate period when the member 3 is moved from the standby position to the appearance position. Further, during a period in which the first carriage 71 is engaged with the second screw portion 702, the first carriage 71 and the second screw portion 702 are in a self-locking state while the rotation of the feed screw 70 is stopped. Therefore, it is possible to prevent the first carriage 71 from moving carelessly.

(Method for manufacturing feed screw 70)
FIG. 16 is an explanatory diagram showing an example of a method of forming the first screw portion 701 and the second screw portion 702 shown in FIG.

As described with reference to FIGS. 13, 14, and 15, in this embodiment, the feed screw 70 includes the first screw portion 701 in which the spiral grooves 706 are provided at equal intervals at the first pitch Pa, and the spiral groove. The spiral groove 706 is not formed in the boundary portion 703 sandwiched between the second screw portions 702 provided at equal intervals with the second pitch Pb. For this reason, when the feed screw 70 is manufactured, as shown in FIG. 16, the outer peripheral surface of the round rod-shaped shaft body 705 is formed with the first die 110 on which the irregularities 111 for forming the first spiral groove 706a are formed. A method of rolling with respect to the second die 120 on which the unevenness 121 for forming the second spiral groove 706b is formed can be employed. For this reason, the feed screw 70 can be manufactured efficiently. In addition, after forming the 1st spiral groove 706a in the 1st screw part 701 and forming the 2nd spiral groove 706b in the 2nd screw part 702, if the boundary part 703 is cut, the boundary part 703 will be comprised by a small diameter. Can do.

(Operation of the composite drive device 1 as a whole)
FIG. 17 is a timing chart showing the operation of the composite drive device to which the present invention is applied. In the composite drive device 1 of this embodiment, the opening / closing mechanism 6, the linear drive mechanism 7, and the tilt drive mechanism 9 have the same drive source 5. Accordingly, when shifting from the state shown in FIGS. 1A and 2A to the state shown in FIGS. 1B and 2B, first, as shown in FIG. Is rotated in one direction, the opening and closing mechanism 6 slides the opening and closing member 4 until time t3, and opens the opening 20 on one side Z1 in the second direction Z with respect to the opening and closing member 4.

On the other hand, in the linear drive mechanism 7, since the mechanical connection between the first carriage 71 and the driven member 3 is delayed by the switching mechanism 8, the driven member 3 is moved in the first direction Y from the time t 2 after the time t 1. Is moved straight toward one side Y1. Then, after the driven member 3 reaches the appearance position at time t3, when the linear drive mechanism 7 further moves the driven member 3 further toward the one side Y1 in the first direction Y until time t4, tilt driving is performed. The mechanism 9 tilts the distal end side of the driven member 3 toward the other side Z2 in the second direction Z. Then, after the adjustment of the posture of the driven member 3 is completed, the motor 50 is stopped at time t5.

At that time, as described with reference to FIG. 13, in the feed screw 70, the first carriage 71 has the second screw portion 702 in the initial period and the final period when the driven member 3 is moved from the standby position to the appearance position. The first carriage 71 moves at a low speed. On the other hand, in the intermediate period when the driven member 3 is moved from the standby position to the appearance position, the first carriage 701 engages with the first screw portion 701, so the first carriage 71 moves at a high speed. To do. When the motor 50 is stopped, the first carriage 71 is engaged with the second screw portion 702, so that the first carriage 701 is in a self-locked state. For this reason, even if the mass of the driven member 3 acts on the first carriage 71 with the motor 50 stopped, the first carriage 71 does not move. Therefore, the state shown in FIGS. 1B and 2B is maintained. In the period from time t3 to time t5, the opening / closing mechanism 6 is idled by the gear 683b, so the position of the opening / closing member 4 does not change.

When the state shown in FIGS. 1B and 2B is shifted to the state shown in FIGS. 1A and 2A, first, the motor 50 starts to rotate in the other direction at time t6. . As a result, the linear drive mechanism 7 moves the driven member 3 linearly toward the other side Y2 in the first direction Y. At that time, while the linear drive mechanism 7 linearly moves the driven member 3 from the time t6 to the time t7 toward the one side Y1 in the first direction Y, the tilt drive mechanism 9 tilts the tip side of the driven member 3. Return to the original posture. When the linear drive mechanism 7 further moves the driven member 3 toward the other side Y2 in the first direction Y until time t8, the opening / closing mechanism 6 moves the opening / closing member 4 between time t8 and time t10. The opening 20 is closed by sliding. At that time, the linear drive mechanism 7 drives the first carriage 71 toward the other side Y2 in the first direction Y until time t9, and linearly moves the driven member 3 toward the other side Y2 in the first direction Y. However, after time t9, the switching mechanism 8 stops driving the driven member 3. In the period from time t6 to time t8, the opening / closing mechanism 6 is idled by the gear 883b, so that the opening / closing member 4 is not driven.

(Main effects of this form)
As described above, in the composite drive device 1 of the present embodiment, the feed screw 70 of the linear drive mechanism 7 includes the first screw portion 701 in which the spiral grooves 706 are provided at equal intervals at the first pitch Pa, and the spiral groove. 706 has the 2nd screw part 702 provided at equal intervals by the 2nd pitch Pb. For this reason, the period during which the first carriage 71 is engaged with the first screw part 701 can be moved faster than the period during which the first carriage 71 is engaged with the second screw part 702. Therefore, the moving speed of the first carriage 71 can be arbitrarily set. Further, during a period in which the first carriage 71 is engaged with the second screw portion 702, the first carriage 71 and the second screw portion 702 are in a self-locking state while the rotation of the feed screw 70 is stopped. Therefore, it is possible to prevent the first carriage 71 from moving carelessly.

Further, the boundary portion 703 sandwiched between the first screw portion 701 and the second screw portion 702 is not formed with the spiral groove 706, and the groove interval continuously changes in the circumferential direction. is not. Accordingly, the spiral grooves 706 need only be formed at the first pitch Pa in the first screw portion 701, and the spiral grooves 702 should be formed at the same interval in the second pitch Pb in the second screw portion 702. Good. For this reason, as described with reference to FIG. 16, the feed screw 70 can be efficiently manufactured using a die or the like, so that the cost of the feed screw 70 and the cost of the composite drive device 1 can be reduced. it can.

Further, in the composite drive device 1 of the present embodiment, even when the opening / closing member 20 is opened and closed by the opening / closing member 4 and when the driven member 3 is moved in the first direction Y between the standby position and the standby position, In the opening / closing mechanism 6 and the linear drive mechanism 7, the drive source 5 is shared. Therefore, the structure of the composite drive device 1 can be simplified. The drive source 5 is a motor 50 including a first output shaft 51 and a second output shaft 52 that protrude toward opposite sides. Therefore, the opening / closing mechanism 6 can be operated by the driving force output from the first output shaft 51, and the linear driving mechanism 7 can be operated by the driving force output from the second output shaft 52. Therefore, a mechanism for branching and transmitting the output of the motor 50 to the linear drive mechanism 7 and the opening / closing mechanism 6 is unnecessary. Further, the composite drive device 1 of the present embodiment is provided with a tilt drive mechanism 9 that tilts the leading end side of the driven member 3 to one side Z1 or the other side Z2 in the second direction Z using the drive source 5 described above. It has been. Therefore, the opening / closing member 4 is opened / closed by the opening / closing member 4, the driven member 3 is inserted / removed through the opening 20, and the attitude of the driven member 3 is adjusted with a simple configuration using one driving source 5. It can be carried out. Therefore, when the driven member 3 is the display member 30, the user can adjust the posture of the display member 30 to a posture in which an image can be easily viewed.

In this embodiment, the opening / closing mechanism 6 slides the opening / closing member 4 in the second direction Z to open the opening 20 on one side Z1 of the opening / closing member 4 in the second direction Z. For this reason, since the opening / closing member 4 does not protrude on the side where the driven member 3 appears, the presence of the opening / closing member 4 is unlikely to become an obstacle. In the opened state, the first member 41 and the second member 42 are overlapped with each other, so that the dimension of the opening / closing member 4 in the second direction Z is reduced in the opened state. Therefore, the presence of the opening / closing member 4 is not easily disturbed.

In the tilt drive mechanism 9, after the restriction of the attitude of the driven member 3 by the guide member 74 is released, the driven member 3 is driven when the linear drive mechanism 7 further drives the driven member 3 toward the appearance position. And the abutting portion 90 are brought into contact with each other in the first direction Y, and the tip end side of the driven member 3 is inclined in the second direction Z. Accordingly, since the posture of the driven member 3 is switched using the direct movement of the driven member 3, the configuration of the tilt drive mechanism 9 can be simplified. Further, when the driven member 3 is tilted, if the distance of linear movement is long, the driven member 3 can be easily adjusted in posture, for example, the driven member 3 can be largely tilted. The driven member 3 includes a main body portion 31 that protrudes from the frame 2 when moved to the appearance position, and an interference portion that protrudes in the second direction Z from the main body portion 31 and contacts the contact portion 90 inside the frame 2. 33. For this reason, the attitude of the driven member 3 can be switched with a relatively simple configuration.

The guide member 74 includes a first guide portion 741 that contacts the driven member 3 from the other side Z2 in the second direction Z, and a second guide portion 742 that contacts the driven member 3 from the one side Z1 in the second direction Z. have. Therefore, the guide member 74 can linearly move the driven member 3 in an appropriate posture. The guide member 74 includes a first support portion 741 a whose one end Y1 in the first direction Y of the first guide portion 741 is inclined to the other side Z2 in the second direction Z, and the first support portion 741 a of the second guide portion 742. And a second support portion 742a whose front end is inclined to one side Z1 in the second direction Z on one side Y1 in the direction Y. For this reason, it is possible to suppress the driven member from being excessively inclined in the second direction Z due to external vibration or the like.

Further, the tilt drive mechanism 9 is configured to tilt the leading end side of the driven member 3 toward the other side Z2 in the second direction Z. For this reason, although the opening / closing member 4 is located on the side where the driven member 3 is inclined, the opening / closing member 4 does not protrude on the side where the driven member 3 appears in this embodiment. The presence of 4 is difficult to get in the way.

Further, in the linear drive mechanism 7, a biasing member 76 that biases the interference portion 33 of the driven member 3 in a direction in which the interference portion 33 contacts the contact portion 90 is provided between the second carriage 72 and the driven member 3. Therefore, the tilt drive mechanism 9 can be reliably operated.

Furthermore, since the linear drive mechanism 7 is provided with the switching mechanism 8, the linear movement of the driven member 3 can be delayed even when the first carriage 71 starts to move. Therefore, when the driven member 3 appears outside the opening 20, interference between the driven member 3 and the opening / closing member 4 can be suppressed. Further, since the switching mechanism 8 includes the lever 81 and the cam mechanism 85, the connection between the driven member 3 and the first carriage 71 can be switched with a relatively simple configuration.

Further, the opening / closing mechanism 6 has the first member 41 aligned in the second direction Z with respect to the second member 42 in the closed state, and the first member 41 and the second member 42 in the first direction Y in the opened state. The

end portions

41 a and 42 a on the other side Z 2 in the second direction Z are set in an oblique posture in which they are drawn into the frame 2. For this reason, the presence of the opening / closing member 4 is not easily disturbed.

In addition, the opening / closing mechanism 6 slides the first member 41 and the second member 42 along the second direction Z by the pinion 62, the first rack 410, and the second rack 420, and therefore has a relatively simple configuration and the first A closed state in which the member 41 and the second member 42 are aligned in the second direction Z and an open state in which the first member 41 and the second member 42 overlap in the first direction Y can be realized.

In addition, since the opening / closing mechanism 6 includes the gear 683b in the gear transmission mechanism 68, the opening / closing member 4 continues to drive the driven member 3 after the opening / closing member 4 performs the opening / closing operation. Can be stopped. Therefore, it is suitable for operating a plurality of mechanisms by the common drive source 5.

(Other embodiments)
In the above embodiment, in the open / close mechanism 6, in the open state, the

end portions

41 a and 42 a on the other side Z 2 of the open / close member 4 in the second direction Z are in an oblique posture drawn into the inside of the frame 2. The end of one side Z 1 in the second direction Z of the member 4 may be in an oblique posture in which it is drawn into the inside of the frame 2. Further, when the opening / closing member 4 is drawn into the frame 2 in the open state, the state in which the opening / closing member 4 is drawn into the frame 2 in a horizontal posture or a vertical posture is not limited to an oblique posture. Good. In the above embodiment, the transmission mechanism 67 is configured by the gear transmission mechanism 68 and the belt transmission mechanism 69 in the opening / closing mechanism 6, but the transmission mechanism 67 may be configured by only the gear transmission mechanism 68. In the above embodiment, in the switching mechanism 8, the engagement shaft 34 is formed on the driven member 3, and the first contact portion 814 and the second contact portion 815 are formed on the lever 81. 34 may be formed on the lever 81, and the first contact portion 814 and the second contact portion 815 may be formed on the driven member 3. In the above embodiment, the opening / closing mechanism 6 is operated by the driving force output from the first output shaft 51 of the motor 50, and the linear driving mechanism 7 is operated by the driving force output from the second output shaft 52. However, the present invention may be applied to a drive device having a configuration in which the driving force output from the common output shaft of the motor 50 is branched and transmitted to the opening / closing mechanism 6 and the linear drive mechanism 7. In the above embodiment, the opening / closing member 4 includes two members (the first member 41 and the second member 42). However, the present invention may be applied to a case where the opening / closing member 4 includes three or more members. In the above embodiment, the opening / closing mechanism 6 is configured to slide the opening / closing member 4 in the second direction Z. However, the present invention is applied when the opening / closing mechanism 6 rotates the opening / closing member 4 to open / close the opening 20. May be. In the above embodiment, when configuring the switching mechanism 8, the engagement shaft 34 is provided on the driven member 3, and the recess 81 (the first contact portion 814 and the second contact portion 815) is provided on the lever 81. The engaging shaft 34 may be provided on the lever 81, and the driven member 3 may be provided with the recess 813 (the first contact portion 814 and the second contact portion 815).

DESCRIPTION OF SYMBOLS 1 ... Drive device, 2 ... Frame, 3 ... Driven member, 4 ... Opening / closing member, 5 ... Drive source, 6 ... Opening / closing mechanism, 7 ... Linear drive mechanism, 9 ... Tilt drive mechanism, 20 ... Opening, 30 ... Display Member, 31 ... main body, 32 ... base, 33 ... interference part, 34 ... engagement shaft, 41 ... first member, 42 ... second member, 50 ... motor, 51 ... first output shaft, 52 ... second output Axis 60 ... Connection portion 61 ... Holder 62 ... Pinion 66 ... Rotating member 67 ... Transmission mechanism 68 ... Gear transmission mechanism 69 ... Belt transmission mechanism 71 ... First carriage 72 ... Second carriage 74 ... Guide member, 75 ... Gear transmission mechanism, 76 ... Biasing member (second biasing member), 77 ... Guide shaft, 81 ... Lever, 82 ... Cam pin, 84 ... Cam surface, 85 ... Cam mechanism, 88 ... Biasing Member (first urging member), 90 ... contact portion, 410 ... first rack, 4 DESCRIPTION OF SYMBOLS 0 ... 2nd rack, 683b ... Gear, 701 ... 1st thread part, 702 ... 2nd thread part, 703 ... Boundary part, 706 ... Spiral groove, 706a ... 1st spiral groove, 706b ... 2nd spiral groove, 711 ... Engaging part, 713 ... convex part (protruding part for retaining), 716 ... first engaging member, 716a ... first engaging part, 717 ... second engaging member, 717a ... second engaging part, 718 ... Carriage holder, 719 ... Coil spring, 813 ... Recess, 814 ... First contact part, 815 ... Second contact part, Y ... First direction, Z ... Second direction, X ... Third direction

Claims

A linear drive mechanism having a carriage and a feed screw in which a spiral groove engaging with the carriage is formed on the outer peripheral surface;
The feed screw is spaced apart from the first screw portion in which the spiral groove is provided at a first pitch in the axial direction, and the spiral groove is at a second pitch shorter than the first pitch. And a second screw portion provided, and a boundary portion that is sandwiched between the first screw portion and the second screw portion in the axial direction and in which the spiral groove is not formed. To drive.
The first screw portion and the second screw portion have the same outer diameter,
2. The driving apparatus according to claim 1, wherein an outer diameter of the boundary portion is smaller than outer diameters of the first screw portion and the second screw portion.
The carriage engages with the spiral groove at a position that is spaced apart in the axial direction with respect to the first engagement portion, and a first engagement portion that engages with the spiral groove. A second engaging portion that is relatively movable in the axial direction with respect to the first engaging portion and is not rotatable relative to the first engaging portion around the axis.
When n is a positive integer, the first pitch is Pa, the second pitch is Pb, and the dimension of the boundary in the axial direction is L0,
n, Pa, Pb, and L0 are the following formulas L0 = Pa = n × Pb
The drive device according to claim 1, wherein:
The carriage includes a first engagement member provided with the first engagement portion, a second engagement member provided with the second engagement portion, the first engagement member, and the second engagement. 2. A carriage holder that supports a member so as to be relatively movable in the axial direction, and a coil spring disposed between the first engagement member and the second engagement member. The drive device as described in any one of thru | or 3.
The drive device according to any one of claims 1 to 4, wherein the feed screw has the second screw portion on both sides in the axial direction with respect to the first screw portion.
A drive source for rotating the feed screw about an axis;
Driven members driven to one side and the other side in the first direction by the carriage;
The drive device according to claim 1, wherein the drive device includes:
The linear drive mechanism has a switching mechanism for switching the mechanical connection between the driven member and the carriage,
The switching mechanism is in a released state in which the mechanical connection between the driven member and the carriage is released when the carriage starts to move to one side in the first direction. The driving apparatus according to claim 6, wherein the driven member and the carriage are mechanically connected after moving a certain distance in one direction.
A frame having an opening that opens toward one side of the first direction;
An opening and closing member for closing the opening;
An opening / closing mechanism that opens and closes the opening by driving the opening / closing member by a driving force of the driving source;
Have
The linear drive mechanism moves the driven member to one side and the other side in the first direction, and retracts the driven member outward from the opening and retracts inward from the opening. The drive device according to claim 6, wherein the drive device is moved between the standby position and the standby position.
The drive device according to claim 8, wherein the drive source is a motor capable of outputting bidirectional rotation.
The motor includes a first output shaft and a second output shaft protruding toward opposite sides,
The opening / closing mechanism is operated by a driving force output from the first output shaft,
The drive device according to claim 9, wherein the linear drive mechanism is operated by a drive force output from the second output shaft.
A tilt drive mechanism that tilts the distal end side of the driven member toward one side or the other side in the second direction intersecting the first direction as the driven member moves to one side in the first direction. The drive device according to claim 6, wherein the drive device is provided.
The linear drive mechanism has a guide member that regulates the attitude of the driven member until the driven member moves from the standby position toward the appearance position,
The tilt drive mechanism contacts the driven member on one side or the other side in the second direction when the driven portion moves to a position where the posture restriction by the guide member is released. The drive device according to claim 11, further comprising a contact portion for tilting the member.
13. The driving apparatus according to claim 6, wherein the driven member is a display member that displays an image.