JP7653801B2 - Movable partition device - Google Patents

Description

This embodiment relates to a runner for moving a panel along a hanger rail to partition a space, and a movable partition device equipped with the runner.

Large spaces such as offices, hotels, wedding halls, stores, schools, public facilities, and gymnasiums can be used as is or divided into several smaller spaces depending on various situations, such as the number of occupants and purpose of use. In this way, movable partition devices are used to change the size and shape of a room depending on the situation. A movable partition device is constructed by hanging a panel on a runner that moves within a rail supported on the ceiling via a fixed member. The panel is moved by a person holding the panel and pushing or pulling it, applying a propulsive force to the panel in the direction of movement. By applying a propulsive force to the panel, the runner moves along the rail, so the panel can be moved and placed at the desired position along the rail.

A known example of such a movable partition device is the movable suspended fitting device shown in Patent Document 1 below. In this device, a first frame stopper is protruding from the upper part of the inner surface of one side wall of the rail, which is in circumferential contact with only the outer side surface of the upper runner, and a second frame stopper is protruding from the middle part of the inner surface of the other side wall, which is in circumferential contact with only the outer side surface of the middle runner and faces the first frame stopper, and a straight inclined surface of a cross-sectionally downward inwardly inclined protrusion is formed on the lower part of the inner surface of the side wall, which is in contact with only the bottom outer edge of the lower runner. This makes it possible to reduce lateral shaking when the hanging door body (panel) moves.

Japanese Utility Model Application Publication No. 63-053485

However, the movable partition device described above has a protrusion between the inner surface of the rail side wall and the side surface of the runner to prevent deflection, which increases the rail width by the amount of the protrusion, resulting in an increase in the size of the rail.

The present invention was made to solve the above-mentioned problems, and aims to provide technology that reduces lateral shaking while also making rails smaller.

In order to solve the above-mentioned problems, one aspect of the present invention is a runner that can move along the inner wall of a rail, and includes an insertion section through which a support shaft that supports a panel is inserted, and a roller section that supports the support shaft via the insertion section, and the roller section is characterized in that a groove section is formed on the outer circumferential surface, in which a tip of a protrusion that protrudes from one side surface of the inner wall and extends in the direction of movement of the runner is located inside and can engage with the protrusion.

The present invention makes it possible to reduce lateral shaking while also making the rails smaller.

1 is a side view showing a movable partition device according to a first embodiment. FIG. FIG. 2 is a vertical cross-sectional view of the hanger rail according to the first embodiment. 3 is a cross-sectional view taken along line AA shown in FIG. 2. FIG. 2 is a vertical cross-sectional view of the runner and its periphery according to the first embodiment. 5 is a cross-sectional view taken along line BB in FIG. 4. FIG. 4 is a vertical cross-sectional view of the periphery of a runner according to a first modified example. FIG. 11 is a vertical cross-sectional view of the periphery of a runner according to a second modified example. FIG. 13 is a diagram for explaining an example of the arrangement of the hanger rail. FIG. 13 is a diagram for explaining an example of the arrangement of the hanger rail. FIG. 2 is a vertical cross-sectional view showing the hanger rail attached to an indoor ceiling. FIG. 2 is a perspective view showing a state in which the hanger rail is suspended and supported by a suspension pipe. FIG. 11 is a side view showing a modified example of the panel of the movable partition device according to the first embodiment. FIG. 2 is a schematic plan view showing the layout of the movable partition device according to the first embodiment. FIG. 11 is a vertical cross-sectional view of the runner and its periphery according to the second embodiment. FIG. 13 is a side view showing a movable partition device according to a third embodiment.

First Embodiment
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. In this specification and the drawings, components having substantially the same functions are denoted by the same reference numerals, and redundant description will be omitted.

(Device configuration)
First, the configuration of the movable partition device according to this embodiment will be described. Fig. 1 is a side view showing the movable partition device according to this embodiment. Note that in Fig. 1, only the hanger rail 10 is shown in vertical section. As shown in Fig. 1, the movable partition device 1 according to this embodiment comprises the hanger rail 10 fixed to a ceiling (not shown), a runner 20 movable along the inner wall of the hanger rail 10, and a panel 30 suspended and supported by the runner 20. Each component will be described in detail below.

(Hanger rail 10)
First, the configuration of the hanger rail 10 will be described. Fig. 2 is a vertical cross-sectional view of the hanger rail according to this embodiment, and Fig. 3 is a cross-sectional view taken along line A-A shown in Fig. 2. The hanger rail 10 supports the runner 20 and forms a running path along which the runner 20 can run. As shown in Figs. 1 and 2, the hanger rail 10 is formed in a substantially C-shaped vertical cross section with an open lower side that defines an internal space 100 capable of accommodating the runner 20. A plurality of the hanger rails 10 are connected and arranged to form a desired running path, thereby determining the position of the panel 30, i.e., the size and shape of the space partitioned by the panel 30. A pair of ribs 120a, 120b are provided at the lower portions of both side walls 110a, 110b of the hanger rail 10 so as to face each other.

As shown in FIG. 1, the rib 120a is spaced apart from the lower roller 220b of the runner 20 in the vertical direction so as not to come into contact with the lower roller 220b. On the other hand, the upper surface of the rib 120b is formed as a plane extending in a substantially horizontal direction, and the upper surface of the rib 120b comes into uniform contact with the lower roller 220b. As a result, the rib 120b supports the lower roller 220b and forms a running surface for the roller to run on. The pair of ribs 120a, 120b are provided at their tips with joint parts 130 having a substantially C-shaped vertical cross section. The joint part 130 engages a rail joint 40 (see FIG. 10) for connecting the hanger rail 10 to another hanger rail 10. The connection between the hanger rails 10 by the rail joint 40 will be described later.

2 and 3, the side wall 110a of the hanger rail 10 is provided with an upper protrusion 140a that protrudes from the inner wall surface and extends along the inner wall surface in the extension direction of the rail, i.e., the movement direction of the runner 20. The side wall 110b of the hanger rail 10 is provided with a lower protrusion 140b that protrudes from the inner wall surface and extends along the inner wall surface in the extension direction of the rail. The upper protrusion 140a is provided at approximately the center in the vertical direction of the upper roller 220a of the runner 20, and the lower protrusion 140b is provided at approximately the center in the vertical direction of the lower roller 220b of the runner 20 and close to the rib 120b (see FIG. 1). For these reasons, the upper and lower protrusions 140a, 140b are arranged so as to be alternated in the vertical direction.

The upper protrusion 140a and the lower protrusion 140b have the same configuration, and when there is no need to distinguish between them, they will be referred to as protrusion 140 in the following explanation. Protrusion 140 protrudes in a tapered V-shape, with its upper surface 140-1 and lower surface 140-2 inclined relative to the horizontal direction. Protrusion 140 individually engages with grooves 226a, 226b (see Figure 1), which are formed in the upper and lower rollers 220a, 220b of the runner 20 and will be described in detail later, thereby reducing swaying when the runner 20 moves and lateral shaking such as axial misalignment of the runner 20 in the lateral direction (width direction of the hanger rail 10).

(Runner 20)
Next, the configuration of the runner 20 will be described. Fig. 4 is a vertical cross-sectional view of the runner and its surroundings according to this embodiment, and Fig. 5 is a cross-sectional view taken along line B-B shown in Fig. 4. Fig. 4 shows a cross-section along the axis of the support shaft 210 of the runner 20. As shown in Fig. 4, the runner 20 has a support shaft 210 disposed in the internal space 100 of the hanger rail 10, and upper rollers 220a and lower rollers 220b that are connected in the vertical direction at a predetermined interval and support the upper end of the support shaft 210. The upper rollers 220a and lower rollers 220b have the same configuration, and when there is no need to distinguish between them, they will be referred to as rollers 220 in the following description.

The support shaft 210 is cylindrical and has a threaded portion (not shown) formed at its lower end, to which a nut 211 (see FIG. 1) is screwed, and is connected to and supported by the panel 30 for partitioning the space.

5, the roller 220 has an inner bearing ring 221, which is a ring-shaped bearing through which the support shaft 210 is inserted, and a ring-shaped outer bearing ring 222 that is provided to surround the outer periphery of the inner bearing ring 221. Between the inner bearing ring 221 and the outer bearing ring 222, multiple hard balls 223 are interposed to enable the outer bearing ring 222 to rotate relative to the inner bearing ring 221. The hard balls 223 allow the outer bearing ring 222 to rotate freely in the horizontal direction around the support shaft 210. In addition, a ring-shaped washer 224 is provided between the upper end of the support shaft 210 and the upper surface of the upper roller 220a to prevent the upper roller 220a from falling off the support shaft 210 and to reduce rotational friction between the upper roller 220a and the upper part of the support shaft 210. Furthermore, a ring-shaped washer 225 is provided between the upper roller 220a and the lower roller 220b to prevent contact between the rollers and reduce rotational friction.

A V-shaped groove 226a is formed on the circumferential surface of the upper roller 220a, i.e., the outer circumferential surface of the bearing outer ring 222 of the upper roller 220a, at approximately the center in the vertical direction so as to face the upper protrusion 140a. Similarly, a V-shaped groove 226b is formed on the outer circumferential surface of the bearing outer ring 222 of the lower roller 220b, at approximately the center in the vertical direction so as to face the lower protrusion 140b. Groove portions 226a and 226b have the same configuration, and when there is no need to distinguish between them, they will be referred to as groove portion 226 in the following explanation.

The groove 226 is structured so that the opposing protrusion 140 can fit into it. Specifically, the upper inner wall surface 226-1 and the lower inner wall surface 226-2 of the groove 226 are inclined relative to the horizontal direction so that the groove width (vertical width) gradually decreases along the depth direction. At least the tip of the protrusion 140 is located within the groove 226, and this is maintained even when the runner 20 is in or near the reference position in the lateral direction as shown in FIG. 4, and even when lateral shaking occurs.

In this embodiment, in the reference position, the upper roller 220a has its circumferential surface separated from the wall surfaces of both side walls 110a and 110b, while the upper inner wall surface 226-1 of the groove 226a is in contact with the upper surface 140-1 of the upper protrusion 140a. On the other hand, the lower roller 220b has its circumferential surface separated from the wall surfaces of both side walls 110a and 110b, while its lower surface is in contact with the running surface of the rib 120b.

As a result, the upper roller 220a rotates in one direction so as to be in contact with the upper protrusion 140a by engaging the groove 226a with the upper protrusion 140a, and the lower roller 220b rotates in the other direction by abutting the rib 120b. Therefore, the upper roller 220a and the lower roller 220b can rotate relative to each other in opposite directions, allowing the runner 20 to run along the inner wall of the hanger rail 10. At that time, wear on the bottom surface of the lower roller 220b can also be suppressed. In addition, the lower roller 220b is separated from the rib 120a and the side wall 110a, but the upper roller 220a is in contact with the upper protrusion 140a. Therefore, the runner 20 does not tilt toward the side wall 110a, and each roller 220 can rotate while maintaining the axis of the support shaft 210 approximately vertical, which in turn allows the runner 20 to run stably. Furthermore, because the upper roller 220a does not come into contact with the side wall 110b, rotation in one direction is not hindered by the upper roller 220a coming into contact with the upper protrusion 140a. Similarly, because the lower roller 220b does not come into contact with the side wall 110a, rotation in the other direction is not hindered by the lower roller 220b engaging with the lower protrusion 140b or coming into contact with the rib 120b.

In addition, even if lateral shaking occurs due to the movement of the panel 30, the upper inner wall surface 226-1 of the groove portion 226 of either the upper roller 220a or the lower roller 220b comes into contact with the upper surface 140-1 of the protrusion 140, so the relative rotation of the upper roller 220a and the lower roller 220b is maintained while the lateral shaking is reduced. In particular, during lateral shaking, the roller 220 climbs the inclination of the upper surface 140-1 of the protrusion 140 against the weight of the panel 30 etc. that it supports, so the effect of reducing lateral shaking is extremely high.

In addition, after lateral shaking occurs, the weight of the panel 30, etc. causes the roller 220 to move down along the slope of the upper surface 140-1 of the protrusion 140, returning it to its original reference position. This makes it possible to automatically position the roller 220, and therefore the runner 20, to the reference position. In addition, because at least the tip of the protrusion 140 is housed within the groove 226, vertical shaking can be reduced in addition to lateral shaking.

In the example shown in FIG. 4, at the reference position of the runner 20, the upper inner wall surface 226-1 of the groove 226b and the upper surface 140-1 of the lower protrusion 140b are slightly separated. This makes it possible to achieve the effect of reducing lateral sway while minimizing contact between the lower roller 220b and the lower protrusion 140b during normal running of the runner 20. On the other hand, at the reference position of the runner 20, the upper inner wall surface 226-1 of the groove 226b and the upper surface 140-1 of the lower protrusion 140b may also be abutted on the lower roller 220b, as with the upper roller 220a. This further enhances the effect of reducing lateral sway, and the runner 20 can be reliably positioned at the reference position after lateral sway.

Furthermore, as shown in FIG. 6, the protrusion 140 may be fitted so as to bite into the groove 226 of each roller 220. Specifically, fitting here means that the upper inner wall surface 226-1 of the groove 226 abuts against the upper surface 140-1 of the protrusion 140, and that the lower inner wall surface 226-2 abuts against the lower surface 140-2 of the protrusion 140. By fitting the protrusion 140 into the groove 226 in this way, it is possible to completely suppress lateral shaking while maintaining stable running of the runner 20.

Also, as shown in FIG. 7, the upper protrusion 140a may be fitted into the groove 226a of the upper roller 220a, and a roller 220c without the groove 226 may be provided in place of the lower roller 220b. Even in this case, if the lower protrusion 140b is formed so that it is always in contact with the outer circumferential surface of the lower roller 220b, lateral shaking can be completely suppressed in the same way as in the embodiment shown in FIG. 6.

(Example of arrangement of hanger rail 10)
Next, an example of the arrangement of the hanger rail 10 will be described. Figures 8 and 9 are schematic cross-sectional views for explaining an example of the arrangement of the hanger rail. Note that Figures 8 and 9 are cross-sectional views equivalent to the line A-A shown in Figure 2. As shown in Figure 8, by connecting two straight hanger rails 10A with an L-shaped hanger rail 10B between them, the running path of the runner 20 can be L-shaped branched, and the running of the runner 20 can be changed to a right angle. Also, as shown in Figure 9, by connecting three straight hanger rails 10A to a T-shaped hanger rail 10C, the running path of the runner 20 can be T-shaped branched, and the running of the runner 20 can be changed to multiple directions.

In this embodiment, the runner 20 is composed of two rollers, an upper roller 220a and a lower roller 220b. As described above, the upper roller 220a contacts only the upper protrusion 140a, and the lower roller 220b contacts only the rib 120b and/or the lower protrusion 140b. Therefore, since there is little contact between each roller 220 and the inner wall surface of the hanger rail 10, stable running is possible even if the running path is an L-shaped branch or a T-shaped branch as shown in Figures 8 and 9. In addition, in the T-shaped branch shown in Figure 9, an intersection C is formed where the rib 120a and the rib 120b, which are different in height, intersect, but the intersection C is formed on an inclined surface that absorbs the height difference, allowing the lower roller 220b to run smoothly at the intersection C.

(How to install the hanger rail 10)
Next, a method of mounting the hanger rail 10 will be described. Fig. 10 is a vertical cross-sectional view showing the state where the hanger rail is mounted on an indoor ceiling, and Fig. 11 is a perspective view showing the state where the hanger rail is suspended and supported by a suspension pipe. As shown in Fig. 10, the hanger rail 10 can be fixed to the ceiling D by a fixing member such as a screw, and in this fixed state, a rod-shaped rail joint 40 is inserted and supported in the joint part 130, so that the hanger rail 10 can be connected to another hanger rail 10 via the rail joint 40. Also, as shown in Fig. 11, the hanger rail 10 may be supported by being suspended from the ceiling D or a beam via a suspension pipe 60, instead of being directly fixed to the ceiling D. At this time, it is preferable to fasten a flat rail joint 50 by a screw or the like to the joint part between the two hanger rails 10 to more firmly connect the two hanger rails 10.

(Example of use of movable partition device 1)
FIG. 12 is a front view showing a modified example of the panel in the movable partition device according to this embodiment. The movable partition device 1 can suspend and support various panels, and can also suspend and support a panel 30A as shown in FIG. 12. The panel 30A has a frame body 310 and a shielding film 320, and the space between the upper frame 311 and the middle frame 312 of the frame body 310 is open to form an open area E in which air can flow, and the shielding film 320 is provided between the middle frame 312 and the lower frame 313. The lower frame 313 is separated from the floor surface F to form the open area E. The shielding film 320 is supported detachably by a plurality of fasteners 330 provided on each of the middle frame 312 and the lower frame 313, and it is preferable to use a light-weight sheet-like material such as a resin film represented by PET (Polyethylene Terephthalate).

The movable partition device 1 that supports such a panel 30A by hanging it can allow air flow by forming an open area E above and below the shielding film 320, while reliably blocking air flow in the area of the shielding film 320. For example, by making the shielding film 320 large enough to fully cover the front of the face when a person is seated, and placing the panels 30A around a desk in an office or between individuals in a meeting, etc., it is possible to reliably prevent the spread of droplets caused by conversation, thereby preventing droplet infection. In this case, it is preferable that the surface of the shielding film 320 is made antibacterial and antiviral. Furthermore, since air can flow above and below the shielding film 320, air does not stagnate between the panels 30A, and the air flow caused by ventilation or air conditioning is not blocked.

Figure 13 is a schematic plan view showing the layout of the movable partition device according to this embodiment. In Figure 13, a layout example for individually dividing the work space G around the desk in an office is shown, and for the sake of explanation, only the hanger rail 10 and the panel 30 are shown as the movable partition device 1. Note that one panel 30 is suspended and supported by two runners 20. In the layout shown in Figure 13, the hanger rail 10 is connected to surround the front and side of the person so as to individually divide the work space G. In addition, the two hanger rails 10 are spaced apart in parallel by the same distance as the distance between the two runners supporting one panel 30, and the ends of the two hanger rails 10 are connected by one hanger rail 10 to form a U-shaped storage section 70 capable of storing multiple panels 30. The hanger rails 10 that form this storage section 70 and the hanger rails 10 that surround the work space G are each connected, and as shown by the arrows in the figure, the multiple panels 30 in the storage section 70 can be moved and positioned around the work space G as appropriate, and the positioned panels 30 can be easily moved and stored in the storage section 70.

According to the embodiment described above, since at least the tip of the protrusion 140 is located in the groove 226, it is possible to reduce the gap between each roller 220 and the wall surface of both side walls 110a, 110b, i.e., to narrow the width of the hanger rail 10 and make the rail smaller while realizing the lateral sway reduction function. In addition, since the protrusion 140 and the groove 226 can be engaged in each of the upper and lower rollers 220, the inclination of the runner 20 can be suppressed. In particular, since the upper protrusion 140a protrudes from the inner wall surface of the side wall 110a and the lower protrusion 140b protrudes from the inner wall surface of the side wall 110b having the rib 120b that forms the running surface, the effect of suppressing the inclination is extremely high, and the runner 20 can be stably run. It goes without saying that the same effect can be achieved even if the runner 20 is made smaller and the hanger rail 10 is made smaller accordingly.

Second Embodiment
In the above-mentioned first embodiment, the lower surface of the lower roller 220b is uniformly in contact with the upper surface of the rib 120b, which is the running surface, but this is not limited thereto, and only a part of the lower surface of the lower roller 220b may be in contact with the rib 120b. In this embodiment, a movable partition device having such a configuration will be described.

Figure 14 is a vertical cross-sectional view of the runner and its surroundings according to this embodiment. Note that Figure 14 shows a cross section along the axis of the support shaft 210 of the runner 20. As shown in Figure 14, the movable partition device 1A according to this embodiment differs from the movable partition device 1 according to the first embodiment in that it is equipped with a hanger rail 10A instead of the hanger rail 10.

Compared to the hanger rail 10, the hanger rail 10A has a rib 120c instead of the rib 120b at the bottom of the side wall 110b. The upper surface of the rib 120c is an inclined surface 121 that slopes downward toward the opposing rib 120a. The lower surface of the lower roller 220b is approximately horizontal, so that only the peripheral edge abuts against the inclined surface 121. Therefore, when the runner 20 runs, the lower roller 220b rotates with only its peripheral edge abutting against the inclined surface 121. Therefore, the contact area of the lower roller 220b with the running surface can be reduced compared to the first embodiment, and the running of the runner 20 can be improved. As shown in FIG. 14, the upper protrusion 140 and the groove 226a of the upper roller 220a are always engaged, as in the first embodiment, so even if only the peripheral edge of the lower roller 220b is in contact with the inclined surface 121, the runner 20 does not tilt toward the side wall 110a and can be maintained in a substantially horizontal state.

Third Embodiment
In the first embodiment described above, the runner 20 has been described as having the upper roller 220a and the lower roller 220b, but this is not limited thereto, and the runner 20 may be configured with a single roller. In this embodiment, a movable partition device having such a configuration will be described.

Figure 15 is a side view showing the movable partition device according to this embodiment. Note that in Figure 15, only the hanger rail 10B is shown in vertical section. As shown in Figure 15, the movable partition device 1B according to this embodiment differs from the movable partition device 1 according to the first embodiment in that it has a hanger rail 10B instead of the hanger rail 10 and a runner 20B instead of the runner 20.

Compared to the hanger rail 10, the hanger rail 10B has an upper protrusion 140a on the side wall 110a, but does not have a lower protrusion 140b. Also, compared to the runner 20, the runner 20B has a single roller 220d instead of the upper roller 220a and the lower roller 220b.

The roller 220d has a groove 226d formed in a position corresponding to the upper protrusion 140a, which has the same configuration as the grooves 226a and 226b. The tip of the upper protrusion 140a is located inside the groove 226d so that the upper inner wall surface 226-1 of the groove 226d abuts against the upper surface 140-1 of the upper protrusion 140a. It is preferable that the groove 226d is provided at a position offset upward from the vertical center position of the roller 220d as shown in FIG. 15, and the upper protrusion 140a is also provided at this position. This is because the effect of reducing lateral shaking, especially rocking, during the movement of the runner 20B can be enhanced as the distance from the rib 120b, which is the running surface, to the groove 226d and the upper protrusion 140a increases. In addition, the lower portion of roller 220d is close to guide portion 150 formed on the lower portion of side wall 110b so as to protrude toward side wall 110a, and guide portion 150 serves one function of reducing lateral shaking.

According to the present embodiment described above, even in the runner 20B consisting of one roller 220d, the tip of the upper protrusion 140a is positioned within the groove 226d, allowing the upper protrusion 140a and the groove 226d to engage with each other, so that the same effect as the movable partition device 1 according to the first embodiment can be achieved.

The present invention can be implemented in various other forms without departing from the spirit or main characteristics thereof. Therefore, the above-described embodiments are merely illustrative in all respects and should not be interpreted as limiting. The scope of the present invention is defined by the claims and is not limited in any way by the text of the specification. Furthermore, all modifications, improvements, substitutions and alterations within the scope of the claims are within the scope of the present invention.

1A, 1B Movable partition device 10, 10A, 10B Hanger rail 110a, 110b Side wall (inner wall)
120b Rib (running piece)
140 Projection 140-1 Upper surface 140-2 Lower surface 140a Upper projection 140b Lower projection 20, 20B Runner 210 Support shaft (support shaft)
220a Upper roller (insertion part, roller part)
220b, 220c Lower roller (lower insertion portion, lower roller portion)
220d Roller (insertion part, roller part)
221 Bearing inner ring (insertion part, lower insertion part)
222 Bearing outer ring (roller part, lower roller part)
226, 226a, 226b Groove 226-1 Upper inner wall surface 226-2 Lower inner wall surface 30, 30A Panel

Claims (5)

A movable partition device,
Rails and
a runner movable along an inner wall of the rail ;
Equipped with
The runner comprises:
a roller portion that supports a support shaft for supporting a panel via an insertion portion through which the support shaft is inserted,
the roller portion is one, the roller portion has a groove formed on an outer circumferential surface, the groove being located inside a tip of a protrusion protruding from one side surface of the inner wall and extending in a moving direction of the runner, the tip of the protrusion being capable of engaging with the protrusion, the roller portion is provided on the rail, and the roller portion runs on a running piece formed continuously from the inner wall so as to constitute a lower surface of the rail, and supports the roller portion;
or
A movable partition device comprising two roller portions, at least one of which has the groove formed on its outer circumferential surface, and the other roller portion which runs on the running piece. The roller portion is two in number,
The movable partition device as described in claim 1, characterized in that the other roller portion is located below the one roller portion , and a groove portion is formed on the outer surface so that the tip of a protrusion portion protruding from the other side surface of the inner wall and extending in the moving direction is located inside and can engage with the protrusion portion . The movable partition device according to claim 2, wherein the other roller portion rotates while abutting on an upper surface of a traveling piece protruding from the other side surface. The protrusion has an inclined upper surface so as to taper,
The movable partition device according to any one of claims 1 to 3, characterized in that the groove portion has an upper inner wall surface that is inclined so as to be able to abut against an upper surface of the protrusion portion. The movable partition device according to any one of claims 1 to 4, characterized in that the protrusion fits into the groove so that an upper surface and a lower surface of the protrusion come into contact with an inner wall surface of the groove.