JP7571104B2 - Slider - Google Patents

Description

The present invention relates to an electrically powered slider.

Patent Document 1 discloses an electric actuator (slider) that is compactly constructed and can maximize the amount of displacement. In this slider, a pinion is rotated by energizing a rotary drive source inside the housing, and a first rack and a second rack that mesh with the pinion are energized in opposite directions. As a result, a first guide rod connected to the first rack and a second guide rod connected to the second rack extend in opposite directions, and the first top plate moves to a stroke that is nearly twice that of the housing.

Patent No. 3479472

However, in the slider disclosed in Patent Document 1, the amount of displacement of the first top plate itself is approximately the full length of the housing. This poses the problem that the amount of displacement obtained with the slider is insufficient.

One aspect of the present invention aims to realize a slider with increased displacement.

In order to solve the above problem, the slider according to aspect 1 of the present invention includes a transmission mechanism that transmits power from a drive mechanism, a guided member that is integrally attached to the transmission mechanism, a pinion gear that is integrally attached to the transmission mechanism, a first rack gear and a second rack gear that mesh with the pinion gear, a first guide member that is fixed to the first rack gear and guides the guided member, a second guide member that is fixed to the second rack gear and guides the guided member in a state parallel to the first guide member, a first frame that holds the first rack gear and the first guide member, and a second frame that holds the second rack gear and the second guide member, and the pinion gear rotates by the power transmitted from the drive mechanism via the transmission mechanism, and the first frame and the second frame move relatively to each other along a movement axis parallel to the first guide member and the second guide member due to the rotation of the pinion gear, and the first frame and the second frame do not overlap each other when viewed in the axial direction of the movement axis.

With the above configuration, the first frame and the second frame do not collide with each other when they move relative to each other along the movement axis. Therefore, the first frame and the second frame can move from positions facing each other to both sides in the direction along the movement axis. This makes it possible to increase the amount of displacement in the slider.

In addition, the slider according to aspect 2 of the present invention may be the slider according to aspect 1, in which the first guide member and the second guide member are positioned between the inner surface of the first frame and the inner surface of the second frame when viewed from the axial direction of the rotation shaft of the pinion gear. With the above configuration, the slider can be made smaller.

The slider according to aspect 3 of the present invention is the slider according to aspect 1 or 2, which includes a plurality of the first guide members and a plurality of the second guide members, and when a plane including the rotation axis of the pinion gear and parallel to the first guide members and the second guide members is referred to as an intermediate plane, the central axis of at least one of the first guide members may be located closer to the second rack gear than the intermediate plane, and the central axis of at least one of the second guide members may be located closer to the first rack gear than the intermediate plane. With the above configuration, the rigidity of the slider is improved.

In addition, the slider according to aspect 4 of the present invention is any one of aspects 1 to 3, and at least one of the first frame and the second frame may further include a pair of pulleys arranged at both ends of the first frame or the second frame, a belt suspended between the pair of pulleys and fixed to the transmission mechanism, and a carriage fixed to a position on the belt opposite the pinion gear. With the above configuration, an even larger amount of displacement can be obtained.

According to one aspect of the present invention, a slider with increased displacement can be realized.

FIG. 2 is a perspective view showing a configuration of a slider according to the first embodiment. FIG. 2 is an exploded perspective view showing the configuration of the slider according to the first embodiment. 3 is a perspective view showing a configuration of a center block provided in the slider according to the first embodiment. FIG. 4 is a plan view of the slider according to the first embodiment as viewed in the axial direction of the movement axis of the second frame. FIG. 1A to 1C are diagrams illustrating an example of an apparatus including a slider according to a first embodiment. FIG. 11 is a perspective view showing a configuration of a slider according to a second embodiment. 11 is a perspective view showing a configuration of a center block provided on a slider according to a second embodiment. FIG. 13A and 13B are diagrams illustrating a configuration of a slider according to a third embodiment. 13A to 13C are diagrams illustrating the operation of a slider according to a third embodiment. 13A and 13B are diagrams illustrating a configuration of a slider according to a modified example of the third embodiment.

[Embodiment 1]
Hereinafter, one embodiment of the present invention will be described in detail.

(Slider Configuration)
Fig. 1 is a perspective view showing the configuration of a slider 1 according to embodiment 1. Fig. 2 is an exploded perspective view showing the configuration of the slider 1. As shown in Figs. 1 and 2, the slider 1 includes a center block 10, a first rack gear 21, a second rack gear 22, a guide shaft 30, a first frame 41, and a second frame 42.

Figure 3 is a perspective view showing the configuration of the center block 10. A different side of the center block 10 from the sides shown in Figures 1 and 2 is shown in Figure 3. As shown in Figure 3, the center block 10 includes a transmission mechanism 11, a pinion gear 12, a bearing 13 (guided member), and a finger guard 14.

There are no particular restrictions on the materials that make up each part of the slider 1, and the materials may be appropriately selected taking into consideration the strength, weight, and manufacturing costs required for each part.

The transmission mechanism 11 transmits power from the drive mechanism 15 to the pinion gear 12. The drive mechanism 15 is, for example, a normal motor or a servo motor. The drive mechanism 15 may be a mechanism included in the slider 1, or may be a mechanism separate from the slider 1. The transmission mechanism 11 has an input shaft (not shown) to which the drive force from the drive mechanism 15 is input, and an output shaft (not shown) that outputs the drive force. The pinion gear 12 is attached integrally to the output shaft of the transmission mechanism 11. The pinion gear 12 rotates integrally with the output shaft.

The transmission mechanism 11 may be, for example, a reducer that reduces the rotational speed of the input power and outputs it. Specifically, the transmission mechanism 11 may be, for example, a worm reducer. When the transmission mechanism 11 is a worm reducer, the output shaft of the transmission mechanism 11 does not rotate even when an external force is applied to the output shaft. This makes it possible to prevent the pinion gear 12 from rotating due to the force applied to the pinion gear 12. This eliminates the need for a brake mechanism to prevent the rotation, and simplifies the configuration of the slider 1. In addition, by varying the characteristics of the worm reducer used as the transmission mechanism 11, it is possible to vary the characteristics of the pinion gear 12, such as the rotational speed and torque.

The first rack gear 21 and the second rack gear 22 are rack gears that mesh with the pinion gear 12. The first rack gear 21 and the second rack gear 22 are arranged to face each other. The pinion gear 12 is located between the first rack gear 21 and the second rack gear 22. As the pinion gear 12 rotates, the first rack gear 21 and the second rack gear 22 move relative to the pinion gear 12.

The guide shaft 30 is a shaft parallel to the first rack gear 21 and the second rack gear 22. The guide shaft 30 includes first guide shafts 31, 32, 33 (first guide members) whose relative positions to the first rack gear 21 are fixed, and second guide shafts 34, 35, 36 (second guide members) whose relative positions to the second rack gear 22 are fixed.

In FIG. 1 and other figures, the guide shaft 30 has a hollow cylindrical shape. However, the shape of the guide shaft 30 only needs to be uniform along the axial direction, and may be, for example, a solid cylindrical shape or a square prism shape.

The first frame 41 holds the first rack gear 21 and the first guide shafts 31, 32, and 33. Specifically, the first frame 41 has a side plate 41a parallel to the guide shaft 30, and end plates 41b and 41c located at both ends of the side plate 41a in the direction along the guide shaft 30. The first frame 41 holds the first rack gear 21 in a state along the side plate 41a. The first frame 41 holds the first guide shafts 31, 32, and 33 between the end plates 41b and 41c.

The second frame 42 holds the second rack gear 22 and the second guide shafts 34, 35, and 36. Specifically, the second frame 42 has a side plate 42a parallel to the guide shaft 30, and end plates 42b and 42c located at both ends of the side plate 42a in the direction along the guide shaft 30. The second frame 42 holds the second rack gear 22 in a state along the side plate 42a. The second frame 42 holds the second guide shafts 34, 35, and 36 between the end plates 42b and 42c.

The bearing 13 is a bearing that is attached integrally to the transmission mechanism 11. The bearing 13 is a plate-shaped member having a hole 13a through which the first guide shafts 31, 32, 33 and the second guide shafts 34, 35, 36 are inserted. The center block 10 including the bearing 13 is guided by the guide shaft 30 inserted into the hole 13a and moves relative to the first frame 41 and the second frame 42. At this time, the movement of the bearing 13 relative to the first frame 41 and the movement of the bearing 13 relative to the second frame 42 are in opposite directions.

The movement of the center block 10 relative to the first frame 41 and the second frame 42 can be expressed as the center block 10 and the second frame 42 moving relative to the first frame 41 on a movement axis parallel to the guide shaft 30, if the first frame 41 is used as a reference. Also, the movement can be expressed as the first frame 41 and the second frame 42 moving in opposite directions relative to the center block 10 on a movement axis parallel to the guide shaft 30, if the position of the center block 10 is used as a reference. In other words, the first frame 41 and the second frame 42 move relative to each other along a movement axis parallel to the first guide shafts 31, 32, 33 and the second guide shafts 34, 35, 36 due to the rotation of the pinion gear 12.

The finger guards 14 may be provided on both ends of the center block 10 in a direction parallel to the guide shaft 30. The finger guards 14 are safety members that prevent fingers from getting into the meshing portion between the first rack gear 21 and the second rack gear 22 and the pinion gear 12.

In addition, the center block 10 may be provided with a lubrication unit that supplies lubricating oil between the bearing 13 and the guide shaft 30. The lubrication unit may be located, for example, near the finger guard 14.

Figure 4 is a plan view of the slider 1 viewed from the axial direction of the movement axis of the second frame 42. As shown in Figure 4, the first frame 41 and the second frame 42 do not overlap each other when viewed from the axial direction of the movement axis of the second frame 42. Therefore, the second frame 42 does not collide with the first frame 41 when moving along the movement axis. Therefore, the second frame 42 can move from a position facing the first frame 41 to both sides in the direction along the movement axis.

A slider that moves only in one direction from a position where the second frame 42 faces the first frame 41 is called a conventional slider. The amount of displacement of the slider 1 is nearly doubled compared to the conventional slider. In other words, the size of the slider 1 to obtain a certain amount of displacement is just over half the size of the conventional slider to obtain the same amount of displacement. This makes it possible to realize a slider that is smaller and lighter than the conventional slider. Therefore, the costs of installing, transporting, and storing the slider 1 are reduced. In addition, since the length of each component of the slider 1 is short, the slider 1 can be manufactured without requiring a special machine tool for processing long components.

In particular, the guide shaft 30 and bearing 13 of slider 1 have a simple structure. Therefore, slider 1 can be made even smaller than slider 2, which will be described later.

As shown in FIG. 4, the side plate 41a of the first frame 41 has an inner surface 41d and an outer surface 41e. The side plate 42a of the second frame 42 has an inner surface 42d and an outer surface 42e. In FIG. 4, the first frame 41 and the second frame 42 are arranged so that the inner surface 41d and the inner surface 42d face each other. Therefore, the inner surface 41d of the side plate 41a can be said to be the inner surface of the first frame 41. The inner surface 42d of the side plate 42a can be said to be the inner surface of the second frame 42.

In FIG. 4, the first guide shafts 31, 32, 33 and the second guide shafts 34, 35, 36 are located between the inner side surface 41d and the inner side surface 42d. Therefore, the slider 1 can be made smaller than when one or more of the first guide shafts 31, 32, 33 and the second guide shafts 34, 35, 36 are located outside the space between the inner side surface 41d and the inner side surface 42d.

In addition, in FIG. 4, the center block 10 is adjacent to the first frame 41 and the second frame 42. In other words, the center block 10 is located outside the space between the first frame 41 and the second frame 42. Therefore, the first frame 41 and the second frame 42 can be made smaller than when the center block 10 is housed between the first frame 41 and the second frame 42.

In FIG. 4, the mid-plane C is a plane that includes the rotation axis of the pinion gear 12 and is parallel to the guide shafts 31 to 36. As shown in FIG. 4, of the first guide shafts 31, 32, and 33, the central axis of the first guide shaft 32 is located closer to the second rack gear 22 than the mid-plane C. Also, of the second guide shafts 34, 35, and 36, the central axis of the second guide shaft 35 is located closer to the first rack gear 21 than the mid-plane C.

When the pinion gear 12 rotates, the pinion gear 12 applies a force to the first rack gear 21 and the second rack gear 22 in a direction that moves them away from the pinion gear 12. By positioning the central axes of the guide shafts 32, 35 as described above, the rigidity of the slider 1 against the force applied by the pinion gear 12 to the first rack gear 21 and the second rack gear 22 is improved.

In order to hold the first guide shafts 31, 32, and 33, the end plate 41b has an area on the first rack gear 21 side of the intermediate plane C and an area on the second rack gear 22 side of the intermediate plane C. In addition, in order to hold the second guide shafts 34, 35, and 36, the end plate 42b has an area on the second rack gear 22 side of the intermediate plane C and an area on the first rack gear 21 side of the intermediate plane C. Therefore, the end plate 41b and the end plate 42b have a shape as if a single plate was divided into a Z shape. In other words, the boundary line between the end plate 41b and the end plate 42b intersects with the intermediate plane C. Similarly, the end plate 41c and the end plate 42c also have a shape as if a single plate was divided into a Z shape.

The number of guide shafts 30 held by each of the first frame 41 and the second frame 42 may be more than one, and is not limited to three. Regardless of the number of guide shafts 30 held by each of the first frame 41 and the second frame 42, the central axis of at least one of the guide shafts 30 held by the first frame 41 may be located on the second rack gear 22 side of the midplane C. In addition, the central axis of at least one of the guide shafts held by the second frame 42 may be located on the first rack gear 21 side of the midplane C.

On the other hand, at least one central axis of the guide shaft 30 held by the first frame 41 may be located on the first rack gear 21 side of the intermediate plane C. At least one central axis of the guide shaft held by the second frame 42 may be located on the second rack gear 22 side of the intermediate plane C. That is, the first frame 41 may hold at least one guide shaft 30 whose central axis is located on the first rack gear 21 side of the intermediate plane C and at least one guide shaft 30 whose central axis is located on the second rack gear 22 side of the intermediate plane C. The second frame 42 may also hold at least one guide shaft 30 whose central axis is located on the first rack gear 21 side of the intermediate plane C and at least one guide shaft 30 whose central axis is located on the second rack gear 22 side of the intermediate plane C.

However, depending on the intended use of the slider 1, there may be cases where the slider 1 does not require much strength against the force applied from the pinion gear 12 to the first rack gear 21 and the second rack gear 22. In such cases, all of the guide shafts 30 held by the first frame 41 may be located closer to the first rack gear 21 than the midplane C. Also, all of the guide shafts 30 held by the second frame 42 may be located closer to the second rack gear 22 than the midplane C. Furthermore, in such cases, the number of guide shafts 30 held by the first frame 41 and the second frame 42 may each be two.

(Example of a device with a slider)
Fig. 5 is a diagram showing an example of an apparatus including the slider 1. Fig. 5 shows a lift 100 including the slider 1. In Fig. 5, reference numeral 501 is a perspective view of the lift 100. The lift 100 includes a plurality of fixed frames 110 and a movable frame 120 movable relative to the fixed frames 110.

In FIG. 5, reference numeral 502 denotes a cross-sectional view in a plane perpendicular to the fixed frame 110 and in the vicinity of the slider 1. In the lift 100, the first frame 41 of the slider 1 is attached to the fixed frame 110, and the second frame 42 is attached to the movable frame 120. When the second frame 42 moves relative to the first frame 41, the movable frame 120 moves relative to the fixed frame 110.

In the lift 100, the slider 1 is located in the space 115 between the fixed frames 110. In conventional lifts, such spaces are dead spaces that cannot be used. The size of the slider 1 required to obtain the required amount of displacement in the lift 100 is smaller than that of a conventional slider required to obtain the same amount of displacement. By housing the miniaturized slider 1 in such a space, the lift 100 itself can also be made smaller. In addition, a sensor for detecting the amount of displacement of the slider 1 can be attached to the surplus space generated around the slider 1.

When the lift 100 is a typical lift, the width of the fixed frame 110 is approximately 50 mm to 60 mm. As shown by reference numeral 502 in FIG. 5, when the slider 1 is completely contained in the space 115, which is a dead space, one side of the slider 1 as viewed from the direction along the movement axis may also be approximately 50 mm. However, even if the slider 1 cannot be completely contained in the space 115 and only a portion of it is contained, the effect of utilizing the dead space can be obtained.

(Another example of a device with a slider)
As described above, the slider 1 can achieve a larger displacement amount than the conventional slider if it has the same size as the conventional slider. Such a slider 1 can be suitably used for transporting materials between multiple devices or across a partition wall. The slider 1 may be provided, for example, in a pass box between a clean room and an external space, or in a pressure adjustment room between a pressurized room and an external space. In this case, the distance over which parts can be handed over using the slider 1 between the clean room or the pressurized room and the external space is increased. Therefore, rails across the partition wall are not required, and the slider 1 can be easily installed. Also, the load receiving racks in the indoor and external spaces can be omitted.

In the above example, the first frame 41 is fixed and the second frame 42 is moved relative to the first frame 41. However, the slider 1 can also be applied to a device in which the center block 10 is fixed and both the first frame 41 and the second frame 42 are moved. Examples of such applications include a drive mechanism for opening and closing a double-door automatic door, a chuck or gripper for gripping an object, or a jack for lifting and lowering a heavy object.

[Embodiment 2]
Other embodiments of the present invention will be described below. For ease of explanation, the same reference numerals are given to members having the same functions as those described in the above embodiment, and the description thereof will not be repeated.

Figure 6 is a perspective view showing the configuration of slider 2 according to embodiment 2. As shown in Figure 6, slider 2 differs from slider 1 in that slider 2 includes a center block 50, a rail 60, a first frame 71, and a second frame 72.

The rail 60 is parallel to the first rack gear 21 and the second rack gear 22. The rail 60 includes first rails 61, 62 (first guide members) fixed to the first rack gear 21, and second rails 63, 64 (second guide members) fixed to the second rack gear 22.

The first frame 71 holds the first rails 61, 62 and the first rack gear 21 in a fixed position relative to each other. Specifically, the first frame 71 has a side plate 71a. The first rack gear 21 and the first rails 61, 62 are provided along the side plate 71a.

The second frame 72 holds the second rails 63, 64 and the second rack gear 22 in a fixed position relative to each other. Specifically, the second frame 72 has a side plate 72a. The second rack gear 22 and the second rails 63, 64 are provided along the side plate 72a.

Specifically, side plate 71a and side plate 72a each have an inner surface that faces each other. The inner surface of side plate 71a can be said to be the inner surface of the first frame 71. The inner surface of side plate 72a can be said to be the inner surface of the second frame 72. The first rails 61, 62 are provided along the inner surface of side plate 71a. The second rails 63, 64 are provided along the inner surface of side plate 72a. In other words, rail 60 is located between the inner surface of the first frame 71 and the inner surface of the second frame 72.

The first frame 71 may have end plates 71b, 71c located at both ends of the side plate 71a in the direction along the rail 60. The second frame 72 may have end plates 72b, 72c located at both ends of the side plate 72a in the direction along the rail 60.

However, unlike the end plates 41b and 41c that contribute to holding the first guide shafts 31, 32, and 33 in the first frame 41, the end plates 71b and 71c in the first frame 71 do not contribute to holding the first rails 61 and 62. Also, unlike the end plates 42b and 42c that contribute to holding the second guide shafts 34, 35, and 36 in the second frame 42, the end plates 72b and 72c in the second frame 72 do not contribute to holding the second rails 63 and 64. For this reason, the end plates 71b, 71c, 72b, and 72c may be designed regardless of the arrangement of the rails 60. Alternatively, the end plates 71b, 71c, 72b, and 72c may be omitted.

In the above example, the first frame 71 and the second frame 72 each held two rails 60. However, the number of rails 60 held by the first frame 71 and the second frame 72 may be one, or three or more.

Figure 7 is a perspective view showing the configuration of the center block 50. As shown in Figure 7, the center block 50 includes a transmission mechanism 51, a pinion gear 52, an insertion portion 53 (guided member), and a finger guard 54. The transmission mechanism 51, the pinion gear 52, and the finger guard 54 are the same as the transmission mechanism 11, the pinion gear 12, and the finger guard 14 in the center block 10.

The fitting portion 53 is a member that is attached integrally to the transmission mechanism 51. The fitting portion 53 has a groove portion 53a into which the first rails 61, 62 and the second rails 63, 64 are fitted. The center block 50 including the fitting portion 53 is guided by the rail 60 that is fitted into the groove portion 53a and moves relative to the first frame 71 and the second frame 72. As a combination of the rail 60 and the fitting portion 53, for example, a Linear Motion Guide (registered trademark) can be used.

Regarding the movement of the center block 50 relative to the first frame 71 and the second frame 72, if the first frame 71 is used as the reference, the center block 50 and the second frame 72 can be expressed as moving relatively to the first frame 71 on a movement axis parallel to the rail 60. Furthermore, if the position of the center block 50 is used as the reference, the first frame 71 and the second frame 72 can be expressed as moving in opposite directions relative to the center block 50 on a movement axis parallel to the rail 60.

Similar to the first frame 41 and the second frame 42 in the slider 1, in the slider 2, the first frame 71 and the second frame 72 do not overlap each other when viewed from the axial direction of the movement axis of the second frame 72. Therefore, the second frame 72 can move from a position facing the first frame 71 to both sides in the direction along the movement axis.

Similar to slider 1, slider 2 can achieve a smaller and lighter slider than conventional sliders. Furthermore, slider 2 can operate with higher rigidity, higher precision, and at higher speeds than slider 1. For this reason, slider 2 can be suitably used in medium to large devices, particularly those requiring a displacement of 1 m or more.

[Embodiment 3]
Fig. 8 is a diagram showing the configuration of the slider 3 according to the embodiment 3. As shown in Fig. 8, the slider 3 includes a pulley 81, a belt 82, and a carriage 83 in addition to the configuration of the slider 1.

The pulleys 81 are a pair of pulleys arranged on both ends of the second frame 42. The belt 82 is a belt suspended between the pulleys 81. Both ends of the belt 82 are fixed to the center block 10.

The carriage 83 is a device on which the object of the operation by the slider 3 is attached. The carriage 83 is fixed to a position on the belt 82 opposite the pinion gear 12. Specifically, the carriage 83 may be fixed to a position on the belt 82 symmetrical to the pinion gear 12. However, the position of the carriage 83 does not necessarily have to be symmetrical as long as it can be considered to be on the opposite side of the pinion gear 12. When the second frame 42 moves relative to the first frame 41, the pinion gear 12 moves relative to the second frame 42 in the opposite direction to the movement direction of the second frame 42 relative to the first frame 41. Since the belt 82 is fixed to the center block 10, the carriage 83 moves relative to the second frame 42 in the same direction as the movement direction of the second frame 42 relative to the first frame 41.

Figure 9 is a diagram showing the operation of the slider 3. In Figure 9, reference numeral 901 shows a state in which the second frame 42 has moved to one side in the direction along the movement axis relative to the first frame 41. Reference numeral 902 shows a state in which the second frame 42 has moved to the other side in the direction along the movement axis relative to the first frame 41. In the following description, the movement direction of the second frame 42 relative to the first frame 41 in reference numeral 901 is referred to as the left direction. Also, the movement direction of the second frame 42 relative to the first frame 41 in reference numeral 902 is referred to as the right direction.

As shown in FIG. 8, when the second frame 42 faces the first frame 41, the center block 10 and the carriage 83 are located at the center of the second frame 42. As shown by reference numeral 901 in FIG. 9, when the second frame 42 moves leftward relative to the first frame 41, the center block 10 moves rightward from the center of the second frame 42. As a result, the carriage 83 moves leftward from the center of the second frame 42. As shown by reference numeral 902 in FIG. 9, when the second frame 42 moves rightward relative to the first frame 41, the center block 10 moves leftward from the center of the second frame 42. As a result, the carriage 83 moves rightward from the center of the second frame 42.

The amount of displacement of the carriage 83 relative to the first frame 41 is greater than the amount of displacement of the second frame 42 relative to the first frame 41. Therefore, the carriage 83 provided on the slider 3 can achieve an even greater amount of displacement than the slider 1.

(Modification)
10 is a diagram showing the configuration of a slider 3A according to a modified example of embodiment 3. In the slider 3, the pulley 81, the belt 82, and the carriage 83 are provided on the second frame 42. In the slider 3A, the pulley 81, the belt 82, and the carriage 83 are also provided on the first frame 41.

In the slider 3A, the amount of displacement of the carriage 83 provided on the second frame 42 relative to the carriage 83 provided on the first frame 41 is even greater than the amount of displacement of the carriage 83 provided on the second frame 42 relative to the first frame 41. Therefore, the carriage 83 provided on the slider 3A can provide an even greater amount of displacement than the slider 3.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. The technical scope of the present invention also includes embodiments obtained by appropriately combining the technical means disclosed in different embodiments.

1, 2, 3, 3A Slider 11, 51 Transmission mechanism 12, 52 Pinion gear 13 Bearing (guided member)
21 First rack gear 22 Second rack gear 31, 32, 33 First guide shaft (first guide member)
34, 35, 36 Second guide shaft (second guide member)
41, 71 First frame 41d Inner surface 42, 72 Second frame 42d Inner surface 53 Fitting part (guided member)
61, 62 First rail (first guide member)
63, 64 Second rail (second guide member)
81 pulley 82 belt 83 carriage

Claims (5)

a transmission mechanism that transmits power from the drive mechanism;
a guided member integrally attached to the transmission mechanism;
a pinion gear integrally attached to the transmission mechanism;
a first rack gear and a second rack gear that mesh with the pinion gear;
a first guide member fixed to the first rack gear and guiding the guided member;
a second guide member that is fixed to the second rack gear and guides the guided member in a state parallel to the first guide member;
a first frame that holds the first rack gear and the first guide member;
a second frame that holds the second rack gear and the second guide member,
the pinion gear rotates by power transmitted from the drive mechanism via the transmission mechanism,
the first frame and the second frame move relative to each other along a movement axis parallel to the first guide member and the second guide member by rotation of the pinion gear;
the first rack gear, the first guide member, and the first frame are positioned so as to overlap with each other in the axial direction of the moving shaft;
the second rack gear, the second guide member, and the second frame are positioned so as to overlap with each other in the axial direction of the moving shaft;
The slider in which the first frame and the second frame do not overlap each other when viewed in the axial direction of the movement axis. the first guide member is longer in the axial direction of the moving shaft than the first rack gear;
The slider according to claim 1 , wherein the second guide member is longer in the axial direction of the movement shaft than the second rack gear. The slider according to claim 1, wherein the first guide member and the second guide member are located between the inner surface of the first frame and the inner surface of the second frame when viewed in the axial direction of the rotation shaft of the pinion gear. a transmission mechanism that transmits power from the drive mechanism;
a guided member integrally attached to the transmission mechanism;
a pinion gear integrally attached to the transmission mechanism;
a first rack gear and a second rack gear that mesh with the pinion gear;
a first guide member fixed to the first rack gear and guiding the guided member;
a second guide member that is fixed to the second rack gear and guides the guided member in a state parallel to the first guide member;
a first frame that holds the first rack gear and the first guide member;
a second frame that holds the second rack gear and the second guide member,
the pinion gear rotates by power transmitted from the drive mechanism via the transmission mechanism,
the first frame and the second frame move relative to each other along a movement axis parallel to the first guide member and the second guide member by rotation of the pinion gear;
When viewed in the axial direction of the movement axis, the first frame and the second frame do not overlap with each other,
The first guide member and the second guide member are each provided in a plurality of portions,
When a plane including the rotation axis of the pinion gear and parallel to the first guide member and the second guide member is referred to as an intermediate plane,
a central axis of at least one of the first guide members is located closer to the second rack gear than the intermediate surface,
A slider , wherein a central axis of at least one of the second guide members is located on the first rack gear side relative to the intermediate surface. a transmission mechanism that transmits power from the drive mechanism;
a guided member integrally attached to the transmission mechanism;
a pinion gear integrally attached to the transmission mechanism;
a first rack gear and a second rack gear that mesh with the pinion gear;
a first guide member fixed to the first rack gear and guiding the guided member;
a second guide member that is fixed to the second rack gear and guides the guided member in a state parallel to the first guide member;
a first frame that holds the first rack gear and the first guide member;
a second frame that holds the second rack gear and the second guide member,
the pinion gear rotates by power transmitted from the drive mechanism via the transmission mechanism,
the first frame and the second frame move relative to each other along a movement axis parallel to the first guide member and the second guide member by rotation of the pinion gear;
When viewed in the axial direction of the movement axis, the first frame and the second frame do not overlap with each other,
At least one of the first frame and the second frame is
a pair of pulleys disposed on both ends of the first frame or the second frame, a belt suspended between the pair of pulleys and fixed to the transmission mechanism;
The slider further includes a carriage fixed to a position on the belt opposite to the pinion gear.

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