JP5610426B2 - Duct cover mounting structure and desk - Google Patents

Description

  The present invention relates to a duct cover mounting structure and a desk that suitably achieve both duct cover detachability and rotational stability.

  This type of duct cover has the simplest structure in which a flat duct cover is simply placed at a position that closes the opening of the cable duct, but the duct cover accidentally falls into the opening during opening and closing operations. May cause problems such as

  Thus, as a countermeasure against such a problem, for example, the one disclosed in Patent Document 1 is known.

  This is composed of a cable duct opened in the top plate, an engagement recess provided at the inner edge in the longitudinal direction of the opening position of the cable duct, and a longitudinal end edge pivotally supported by the central portion in the longitudinal direction. And a duct cover having an engaging protrusion that engages with the engaging recess, and when the duct cover is deployed flat, the front and rear engaging protrusions engage with the front and rear engaging recesses. When closing the duct and opening the duct cover, one of the engaging protrusions will be used as a fulcrum to open in any direction, so that the duct cover will not accidentally fall into the opening during opening and closing operations. ing.

JP 2002-177053 A

  However, in the case of such a structure, the duct cover is always attached to the opening edge, so that the maximum opening is limited, and the trouble becomes particularly great when an outlet, a hub or the like is taken in and out. In addition, when opening the opening, the duct cover is folded in half and raised to one of the opening edges, so when sharing the cable duct with the desk facing, the cable duct is accessed simultaneously from the facing position. There are restrictions on the use of cable ducts.

  Therefore, the opposite edges of the flat duct cover are supported on the opening edge of the cable duct via two shafts and their corresponding bearings, and one of the shafts is opened from the bearing, so that the duct cover can be moved in any direction. Adopting a semi-pivot structure that allows the two shafts to be removed from the bearing at the same time by lifting upward from the horizontal closed state, and removing the duct cover one by one and the possibility of dropping at that time It is considered as an effective means to reduce as much as possible.

  However, when a desktop panel or the like is placed in the center where the opposite end of the top plate faces, this panel will be positioned on the duct cover, so the duct cover will interfere with the desktop panel and will be difficult to remove. This makes wiring work difficult.

  On the other hand, if the shaft can be attached to and detached from the bearing regardless of the orientation of the duct cover, the shaft will be easily detached from the bearing during rotation, and a stop stopper for holding the duct cover in a standing posture will be used. When the duct cover hits strongly, the bearing part may come off unexpectedly. Furthermore, if the standing duct cover is held with a stopper provided separately on the desk body side to maintain the standing posture, an extra structure is required on the desk body side, and the duct space will be narrowed. Become.

  These are configured so that the edge of the duct cover can be rotated to the opening edge of the cable duct via the shaft and the bearing and can be attached and detached regardless of the attitude of the duct cover even when the desk is used alone. In some cases, you will have similar circumstances.

  The present invention has been made paying attention to such a problem, and aims to realize a new duct cover mounting structure capable of ensuring stable operability and a reliable standing state even if it is easy to attach and detach. Yes.

  In order to achieve this object, the present invention takes the following measures.

  That is, the duct cover mounting structure of the present invention is such that the duct cover is rotatably supported at a position for opening and closing the opening of the cable duct via the shaft and the bearing, and between the shaft and the bearing, An attachment / detachment permitting part that allows attachment / detachment of the shaft with respect to the bearing within a range from the angle at which the duct cover is used to close the opening to the predetermined angle, and after the angle of the duct cover reaches the predetermined angle. An attachment / detachment restricting portion for restricting attachment / detachment of the shaft to / from the bearing is provided.

  If comprised in this way, according to the surrounding environment, it becomes possible to attach or detach a duct cover at an appropriate angle. Moreover, since the attachment / detachment to the opening is restricted after the duct cover reaches a predetermined angle, a stable rotation area can be secured at the same time, and even if the duct cover strongly hits the stopper for stopping in the standing position. Thus, it is possible to effectively eliminate the inconvenience that the bearing portion is accidentally detached.

  In order to easily and reliably hold the duct cover at the standing angle, it is desirable to provide a stop portion between the shaft and the bearing that provides a rotation end when the duct cover reaches the standing angle.

  In order to easily realize the easy attachment / detachment by the attachment / detachment allowance and the state where the attachment / removal restricting part is difficult to be removed, the attachment / detachment allowance allows the shaft to be attached / detached while elastically expanding the insertion / removal opening provided in a part of the bearing. It is preferable to form a permissible structure and configure a hook structure that suppresses elastic deformation of the insertion / removal port between the shaft and the bearing after the attachment / detachment restricting portion reaches a predetermined angle.

  In order to easily configure the attachment / detachment permission portion and the attachment / detachment restriction portion, the bearing has a locking portion inside the insertion / removal opening, and the shaft has a major axis direction and a minor axis direction in the cross section, and the major axis direction It is preferable that the shaft passing through the insertion / removal opening is rotated at the mounting position so that both ends in the major axis direction are hooked on the locking portion.

  As a preferred embodiment of such a deformed shaft, the shaft has in part a flat surface cut by a plane parallel to the axis, and the flat surface abuts against the inner wall of the bearing at the end of rotation. In this case, a stop portion that stops the shaft at that position is configured.

  In order to effectively improve the convenience of access to the cable duct, the opposing edges of the duct cover are supported at positions where the opening of the cable duct is closed via two shafts and bearings paired with them. The duct cover can be rotated in any direction while the other shaft is released from the bearing and the other shaft is supported by the bearing, and a rotation allowing portion and a rotation regulating portion are provided between the corresponding shaft and the bearing, respectively. It is preferable.

  In order to construct a desk that effectively improves the convenience of wiring processing at the non-use end, the above duct cover mounting structure is applied to the duct cover disposed on the anti-use end side of the top plate, and the duct cover is applied. Is preferably disposed at a position to close the opening of the cable duct.

  In this case, in order to attach and detach the duct cover at an angle that does not easily interfere with the desktop panel, it is preferable that the lower end portion of the desktop panel is positioned above the duct cover via a predetermined gap.

  In order to further improve the workability at the time of opening and closing the duct cover, it is desirable that a gap enough to insert a finger is secured between the edge of the duct cover and the counter-use end of the top plate.

  Since the present invention has the configuration described above, the duct cover can be rotated to a position for opening and closing the opening of the cable duct via the shaft and the bearing, and can be easily attached / detached in a detachable manner regardless of the orientation of the duct cover. However, when necessary, the opening of the duct cover can be fully opened, and at the same time, it is possible to ensure a stable operability that is difficult to come off when rotating more than a predetermined angle. A novel and useful duct cover mounting structure that enables the handling of the duct cover can be provided.

The perspective view which shows the desk which concerns on one Embodiment of this invention. The perspective view which shows the same desk in the state which removed the duct cover. The fragmentary perspective view for demonstrating the bearing structure which supports the duct cover. The fragmentary perspective view for demonstrating the bearing structure which supports the duct cover. The fragmentary perspective view for demonstrating the bearing structure which supports the duct cover. Sectional drawing when the duct cover is in a use position. Sectional drawing when the duct cover exists in the attachment / detachment allowable angle. Sectional drawing when the same duct cover reaches the attachment / detachment prohibition angle. Sectional drawing when the duct cover reaches the standing angle. The figure which shows the modification of this invention. The figure which shows the other modification of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The desk 1 of this embodiment shown in FIG.1 and FIG.2 constructs the top plates 21 and 22 between the left and right legs 1a and 1b, and connects the cable ducts to the counter-use ends 21a and 22a side of the top plates 21 and 22. 3, and a duct cover 4 is detachably disposed on the opening edge of the cable duct 3 in order to close the upper opening 30 serving as an inlet / outlet for the cable duct 3. In particular, in this embodiment, the counter-use ends 21a and 22a of the top plates 21 and 22 are opposed to each other with the common back plate 5 interposed therebetween so that they can be used face-to-face, and the cable duct 3 is counter-use of the pair of top plates 21 and 22 An opening is provided between the ends 21a and 22a.

  And support body 61, 61, 62 is arrange | positioned in the both ends and center part of the backplate 5, and the duct cover receptacle 61a, 62a is provided in the upper end part, These support body 61, 62 and a pair of top plate 21, The flat duct cover 4 that closes the opening 30 surrounded by the counter-use ends 21a and 22a of 22 is installed so as to span between adjacent duct cover receivers 61a and 62a. In the figure, the closing member 7 standing on the duct cover 4 and the desktop panel 8 attached between the supports 61 and 61 will be described later.

  FIG. 3 is an enlarged view of the duct cover receiver 62 a at the center, together with the duct member 31 constituting the cable duct 3. The duct member 31 is a channel-shaped member made of a sheet metal material, and is arranged in a state where the bottom wall 31a is placed on the upper surface 51 of the back plate 5 as shown in FIG. 2, and the top plate support surface 31c is placed on the upper end of the side wall 31b. have. This duct member 31 has a function of accommodating cables, outlets, hubs, etc. dropped from the counter-use ends 21a, 22a side of the top plates 21, 22 through the opening 30, and particularly when the top plates 21, 22 are large in size. It also serves to prevent the sinking of the center of the top plate. The cable duct 3 is a wiring passage (wiring space) formed between the top plates 21 and 22 with the duct member 31 as a main body.

  The support body 62 disposed in the center is a substantially columnar shape with the lower end fixed to the bottom wall 31a of the duct member 31, and the duct cover receiver 62a configured at the upper end is shown in FIG. 3 and FIG. A pair of shafts 6 a and 6 b for forming a bearing structure between the support body 62 and the duct cover 4 on both left and right end faces are projected in the top plate width direction (X direction). 2 are also substantially columnar, and the duct cover receiver 61a configured at the upper end corresponds to the support 61 as shown in FIG. The pair of shafts 6a and 6b for constituting the bearing structure between the duct cover 4 and the pair of shafts 6a and 6b constituting the duct cover receiver 62a in the central portion coincide with each other on the end surface. It is made to protrude toward the top plate width direction (X direction).

  On the other hand, as shown in FIGS. 4 and 5, a pair of bearings 4a and 4b that engage with the shafts 6a and 6b are provided on the left and right end faces of the duct cover 4, respectively. The pitch between the centers of the pair of shafts 6a and 6b and the pitch between the centers of the pair of bearings 4a and 4b are set to be equal to each other.

  These shafts 6a and 6b and the bearings 4a and 4b are for supporting the duct cover 4 so as to be rotatable in both directions. As shown in FIG. 6 → FIG. 7 → FIG. 8 → FIG. The duct cover 4 can be rotated in one direction while releasing the shaft 6b from the bearing 4b and the other shaft 6a supported by the bearing 4a. In contrast, although not shown, the other shaft 6a is rotated. The duct cover 4 can be rotated in the other direction while being released from the bearing 4a and with one shaft 6b supported by the bearing 4b. When the angle of the duct cover 4 is within the range from the angle (see FIG. 6) at the use position 4 (R) for closing the opening to the predetermined angle θ1 (see FIG. 8), FIG. As shown by an arrow P, the shaft 6a is allowed to be attached to and detached from the bearing 4a, and after the angle of the duct cover 4 reaches the predetermined angle θ1 shown in FIG. 8, the shaft 6a is supported until the standing angle θ2 shown in FIG. The attachment and detachment with respect to 4a is controlled. However, when there is the desktop panel 8 indicated by an imaginary line in FIGS. 8 and 9, the position 4 that interferes with the desktop panel 8 when the duct cover 4 rotates as shown by the arrow Q as shown in FIG. The angle θ3 is exceeded and the duct cover 4 is rotated when the desktop panel 8 is not disposed.

  The bearing structure will be specifically described. The bearings 4a and 4b are formed on a resin end member 41 constituting the duct cover 4 as shown in FIGS. None, the lower end side is provided with an insertion / removal opening S (see FIG. 7) that leads to the bearing surface by the fixed piece 42 and the elastic piece 43, and the inner space is wider than the insertion / removal opening S. The elastic piece 43 can be elastically deformed in the direction of expanding the insertion / removal opening S as the shafts 6a and 6b are attached / detached. For example, the elastic piece 43 is attached to the shafts 6a and 6b fitted as shown in FIGS. The tip 43a protrudes in a direction to narrow the insertion / removal port S so as to be held. The fixed piece 42 also projects in the direction in which the tip 42a narrows the insertion / removal port S.

  On the other hand, the pair of shafts 6a and 6b are solid ones each having a flat surface 6y cut out by a plane parallel to the axial center and having a D-shaped cross section, and are symmetrical with the flat surfaces 6y facing each other. Provided. These shafts 6a and 6b are arranged so that the flat surface 6y faces in the vertical direction. Hereinafter, as necessary, a direction parallel to the flat surface 6y in the axial cross section is referred to as a major axis direction (m direction in FIG. 4), and a direction perpendicular to the flat surface 6y is referred to as a minor axis direction (n direction in FIG. 4).

  When the duct cover 4 is in the horizontal use position 4 (R) for closing the opening 30 as shown in FIGS. 1 and 6 and the like, the upper surface 49 of the duct cover 4 is the upper surface 69 of the duct cover receivers 61a and 62a. A gap Δ is provided between the facing edges 48 and 48 of the duct cover 4 and the counter-use ends 21a and 22a of the top plate so that a finger can be inserted. Has been. The duct cover 4 has a closing member for closing the gap L between the lower end portion 81 of the desktop panel 8 and the upper surface 49 of the duct cover 4 so that the top work surface cannot be seen from the facing side, as will be described later. 7 is attached, but without this closing member 7, when the duct cover 4 is lifted from the state of FIG. 6 in the direction orthogonal to the upper surface 49 (Z direction), the major axis direction (m direction) shown in FIG. ) Along the axis 6a, 6b toward the insertion / removal port S, and the elastic piece 43 is elastically deformed in a direction to widen the insertion / removal port S to the extent that the minor axis direction (n direction) can pass through, thereby the shaft 6a, 6b can be allowed to leave. When the shafts 6a and 6b are fitted together, the elastic pieces 43 are pushed in with relatively small elastic deformation. With the shafts 6a and 6b fitted into the bearings 4a and 4b, the elastic piece 43 has recovered to some extent, and the tip 43a is not on the flat surface 6y but on the cylindrical surface 6z of the outer periphery of the shafts 6a and 6b. In contact. At this time, the tip 42a of the fixed piece 42 is in contact with or close to the flat surface 6y. A part in which such attachment / detachment is established is referred to as an attachment / detachment allowable part A.

  Next, when a rotational force about one shaft 6a is applied to the duct cover 4 from the use position 4 (R) shown in FIG. 6, the other shaft 6b is a bearing as shown in FIGS. It is released from 4b and can rotate around one shaft 6a. The above-described attachment / detachment allowance portion A that allows attachment / detachment of the shafts 6a and 6b has a predetermined angle θ1 shown in FIG. 8 from an angle at which the duct cover 4 is at the use position 4 (R) shown in FIG. It functions until just before, and the interval is an attachment / detachment allowable angle. After the duct cover 4 reaches the predetermined angle θ1 shown in FIG. 8, until the standing angle θ2 shown in FIG. 9 is reached, the tip 43a of the elastic piece 43 and the tips 42a of the fixed piece 42 are flat on the shafts 6a and 6b. A state of wrapping around the surface 6y is obtained. In this state, even if a force in a direction perpendicular to the upper surface 49 (Z direction) is applied to the duct cover 4, the tips 43a and 42a of the fixed piece 42 and the elastic piece 43 are caught on the flat surface 6y, and the insertion / removal opening S The elastic deformation of is suppressed. That is, the ends 43a and 42a of the elastic piece 43 and the fixed piece 42 function as locking portions for locking the shafts 6a and 6b, and both ends of the flat surface 6y in the major axis direction (m direction) shown in FIG. Is caught by these latching | locking parts 43a and 42a, and detachment | leave from the insertion / extraction opening | mouth S is controlled. A part having such a relationship is referred to as an attachment / detachment restriction part B, and a period during which the attachment / detachment restriction part B is functioning is referred to as an attachment / detachment restriction angle.

  Further, in this embodiment, the flat surface 6y hits the inner wall of the bearing 4a at the rising angle θ2 so that the rising angle θ2 shown in FIG. 4 is configured to constitute a stop 4k that stops the rotation of 4. At this time, the center of gravity M of the duct cover 4 moves to a position slightly above the shaft 6a, and the duct cover 4 stably stops at the standing angle θ2. The above is exactly the same when the duct cover 4 rotates in the reverse direction.

  Next, the desktop panel 8 and the closing member 7 shown in FIG. 1 will be described. The support bodies 61d at both ends are provided with desktop panel mounting portions 61d, and are normally closed by covers 61c as shown in FIG. As shown in FIG. 1, the cover 61c is opened to open a desktop panel mounting portion (not shown) behind the cover 61c, and a support rod 82 hanging from both sides of the panel body 80 is inserted into the desktop panel mounting portion from above. Thus, the lower end portion 81 of the desktop panel 8 is positioned above the duct cover 4.

  At this time, the lower end portion 81 of the desktop panel 8 is not placed directly on the upper surface 49 of the duct cover 4 but is placed slightly above the duct cover 4 with a predetermined gap L as shown in FIG. Thus, using the gap L, the duct cover 4 can be retreated from the use position 4 (R) without removing the desktop panel 8 if there is no closing member 7 in FIG.

  However, if there is no closing member 7, the top work surface is visually recognized from the facing side through the gap L between the lower end portion 81 of the desktop panel 8 and the upper surface 49 of the duct cover 4. In this embodiment, a closing member 7 that closes the gap L is attached to the duct cover 4 as an optional member. 6 to 7, when the duct cover 4 is retracted from the use position 4 (R), the closing member 7 is simultaneously retracted from the gap closing position 7 (R).

  Specifically, as shown in FIGS. 4 and 5, the duct cover 4 includes a pair of end members 41 and 41 having bearings 4a and 4b at corresponding positions, and the end members 41 and 41 at both ends. A cover main body 40 is provided between the both end members 41 and 41 by fitting. The cover main body 40 is an extruded material, and has an engaging groove 49a having a shape extending along the longitudinal direction on the upper surface 49 and having an inner space wider than the opening. On the other hand, the closing member 7 has a plate-like shape having an expanded base end 72 that can be attached to and detached from the engagement groove 49a only by a sliding movement from the end 71 as shown by arrows in FIGS. Then, it is arranged in a state where it is slid and inserted from the end portion 71 and rises upward from the central portion of the duct cover 4 in the short direction (T direction in FIG. 4), and the end members 41 and 41 are fitted together. The engaging groove 49a is closed by the end plate 41a of the end member 41 so that the closing member 7 cannot be removed.

  The closing member 7 is disposed in an upright state from the upper surface 49 of the duct cover 4 toward the thickness center 8x at the lower end portion 81 of the desktop panel 8 at the gap closing position 7 (R) shown in FIG. As described above, the duct cover 4 can be removed upward when the desktop panel 8 is not present, but cannot be removed upward when the desktop panel 8 and the closing member 7 are present. In contrast, in the present embodiment, the closing member 7 moves from the thickness center 8x of the desktop panel 8 as shown in FIGS. 6 to 7 in accordance with the retraction operation from the opening 30 of the cable duct 3 due to the rotation of the duct cover 4. It is configured to move in a direction away from it. At the position where the distal end 73 of the closing member 7 is pulled out in the thickness direction (Y direction) from the lower end portion 81 of the desktop panel 8, there is still an attachment / detachment permission portion A configured between the shafts 6a, 6b and the bearings 4a, 4b. The duct cover 4 is removed without causing the blocking member 7 to interfere with the desktop panel 8 as shown by an arrow P in the figure, which is set to be within a functioning angle, that is, an attachment / detachment allowable angle (range of 0 ° to θ1). To be able to. Of course, the wiring process can be performed by moving to the maximum opening angle θ3 that interferes with the desktop panel 8, and when there is no desktop panel 8, the wiring process can be performed by moving to the standing angle θ2 shown in FIG. is there.

  When the closing member 7 is brought into contact with or close to the lower end portion 81 of the desktop panel 8 at the use position 7 (R) of the wiring cover 4 shown in FIG. 6, the rotation locus of the tip 73 of the closing member 7 around the shafts 6a and 6b. 6 interferes with the desktop panel 8, so that a clearance C is provided between the tip 73 of the closing member 7 and the lower end 81 of the desktop panel 8 so as to avoid interference and not impair the closing function as shown in FIG. is there. Of course, if the closing member 7 is brought into contact with or close to the lower end portion 81 of the desktop panel 8, it is sufficient to use a material such as a soft resin at least at the tip 73.

  Further, as shown in FIGS. 1 and 2, in this embodiment, the closing member 7 is divided into two pieces in the top plate width direction together with the duct cover 4, and the closing member 7 is interrupted by the support 62 at the center. Although a gap is shown, a part of the blocking member 7 can be extended in the top plate width direction so that the gap is filled, or a fixed blocking member is separately provided on the support 62 in the center. Since appropriate measures such as filling the gaps are possible, they are not particularly shown in detail.

  As described above, in the duct cover mounting structure according to the present embodiment, the duct cover 4 is rotatably supported at the position where the opening 30 of the cable duct 3 is opened and closed via the shafts 6a and 6b and the bearings 4a and 4b. Between the shaft 6a (6b) and the bearing 4a (4b), the angle of the duct cover 4 is within a range from the angle (horizontal) at the use position 4 (R) to the predetermined angle θ1. The attachment / detachment allowable part A that allows attachment / detachment of the bearing 6a to the bearing 4a (4b) and the attachment / detachment of the shaft 6a (6b) to the bearing 4a (4b) are restricted after the angle of the duct cover 4 reaches the predetermined angle θ1. Since the attachment / detachment restricting portion B is provided, the duct cover 4 can be attached / detached at an appropriate angle according to the surrounding environment. Moreover, since the attachment / detachment to the opening 30 is restricted after the duct cover 4 reaches the predetermined angle θ1, a stable rotation region can be secured at the same time, and the duct cover 4 is used for stopping at the standing angle θ2, which is the end of rotation. Even if it strongly hits the stopper, it is possible to effectively eliminate the inconvenience that the bearing portion is accidentally detached.

  In addition, since a stop portion 4k is provided between the shaft 6a (6b) and the bearing 4a (4b) to provide a rotation end when the duct cover 4 reaches an upright angle, an extra portion is provided on the desk body side. It is not necessary to separately configure the stopper structure, and problems such as narrowing the duct space can be effectively avoided.

  In particular, the attachment / detachment allowance part A employs a structure that allows the attachment / detachment of the shafts 6a, 6b while elastically expanding the insertion / removal opening S provided in a part of the bearings 4a, 4b. Since the hook structure that suppresses elastic deformation of the insertion / removal port S is adopted between the shaft 6a (6b) and the bearing 4a (4b) after reaching the angle, the shaft 6a (6b) and the bearing 4a (4b) With this simple structure, it is possible to effectively realize the easy attachment / detachment by the attachment / detachment permission portion A and the state in which the attachment / detachment restriction portion B is difficult to come off.

  Further, the bearings 4a and 4b have locking portions 43a and 42a inside the insertion / removal port S, and the shafts 6a and 6b have a major axis direction (m direction) and a minor axis direction (n direction) in cross section, A structure in which the shafts 6a and 6b that have passed through the insertion / removal port S along the long axis direction (m direction) are rotated at the mounting position, and both ends in the long axis direction (m direction) are hooked on the locking portions 43a and 42a. Therefore, the attachment / detachment permitting part A and the attachment / detachment restricting part B can be simply configured by simply changing the shafts 6a and 6b and appropriately setting the relationship between the engaging parts 43a and 42a. .

  Specifically, the shafts 6a and 6b partially have a flat surface 6y cut by a plane parallel to the shaft center, and the flat surface 6y is abutted against the inner walls of the bearings 4a and 4b at the end of rotation to thereby support the shaft 6a. , 6b is configured to stop at that position, the rotation end of the shafts 6a, 6b can be simply realized.

  In particular, in the present embodiment, the opposed edges 48 and 48 of the duct cover 4 are supported at positions where the opening 30 of the cable duct 3 is closed via the biaxial shafts 6a and 6b and the bearings 4a and 4b paired with them. One shaft 6b (6a) is released from the bearing 4b (4a) and the duct cover 4 can be rotated in any direction while the other shaft 6a (6b) is supported by the bearing 4a (4b). The rotation permitting part A and the rotation restricting part B are provided between the corresponding shaft 6a (6b) and the bearing 4a (4b), respectively, and the duct cover 4 can be rotated to either side. Access to can be improved effectively.

  Such a duct cover mounting structure can be applied to various duct covers, but in the present embodiment, such a duct cover mounting structure is disposed on the counter-use ends 21a, 22a side of the top plates 21, 22. Since it is applied to the duct cover 4 and the duct cover 4 is disposed at a position that closes the opening 30 of the cable duct 3, it is possible to effectively improve the convenience of wiring processing at the counter-use ends 21a and 22a of the desk 1. it can.

  In this case, since the lower end portion 81 of the desktop panel 8 is positioned above the duct cover 4 via a predetermined gap L, the installation and removal of the duct cover 4 interferes with the desktop panel 8 within the gap L. This can be done appropriately at difficult angles.

  Further, a gap Δ that allows a finger to be inserted is secured between the edge 48 of the duct cover 4 and the counter-use ends 21a and 22a of the top plates 21 and 22, and the duct cover 4 is shown by a solid line in FIG. As shown in the figure, since the attaching / detaching operation can be performed by picking the edge portion 48 with a finger or the like, the workability can be improved more effectively.

  The specific configuration of each unit is not limited to the above-described embodiment.

  For example, in the above-described embodiment, the opposed edges 48 and 48 of the duct cover 4 are supported at positions where the opening 30 of the cable duct 3 is closed via the biaxial shafts 6a and 6b and the bearings 4a and 4b paired with them. One shaft 6b (6a) is opened from the bearing 4b (4a) and the duct cover 4 is rotated in either direction while the other shaft 6a (6b) is supported by the bearing 4a (4b). The rotation allowing portion A and the rotation restricting portion B are provided between the corresponding shaft 6a (6b) and the bearing 4a (4b), respectively, but as shown in FIG. 10, one edge portion 148a of the duct cover 104 is provided. Even in the single opening type in which the side is supported at a position where the opening 130 of the cable duct 103 is closed via the shaft 106a and the bearing 104a paired therewith, the shaft 106a and the bearing 104a Or provided as rotation permitting portion A rotation regulating portion B, the closure member 107 when away from the thickness center 108x of the desktop panel 108, action and effect in accordance to the above is achieved. In this case, the other edge 148b side of the duct cover 104 may be supported at a position where the opening 130 of the cable duct 103 is closed via the simple catch mechanism 100. The catch mechanism 100 shown in the figure is constituted by a shaft 106b and a bearing 104b similar to the shaft 6b and the bearing 4b.

  In the same figure, the other edge portion 148b of the duct cover 104 is provided with a flexible portion 104z made of soft resin or the like, and is necessary to close the gap Δ with the top plate 122 at the use position 104 (R). It is also effective to adopt this for both edges 48, 48 of the double-rotation type duct cover 4 of the above embodiment.

  Furthermore, in the above embodiment, the shafts 6a and 6b have a solid D-shape having a flat surface 6y in part. However, if the strength can be secured, a hollow D-shape as shown in FIG. The shafts 206a and 206b having a shape may be employed, or C-shaped shafts 306a and 306b as shown in FIG. Of course, the shape of the corresponding bearings 4a and 4b is not limited to the above embodiment. In short, the shape and structure are not particularly limited as long as an attachment / detachment permission portion, an attachment / detachment restriction portion, a stop portion, or the like can be formed between the shaft and the bearing.

  In addition, various modifications can be made without departing from the gist of the present invention, such as a configuration in which a shaft is projected toward the duct cover side and a duct cover receiver on the support side is used as a bearing.

DESCRIPTION OF SYMBOLS 1 ... Desk 3 ... Cable duct 4 ... Duct cover 4a, 4b ... Bearing 4k ... Stop part 4 (R) ... Use position 6a, 6b ... Shaft 6y ... Flat surface 8 ... Desktop panel 21,22 ... Top plate 21a, 22a ... Counter-use end 30 ... opening 43a, 42a ... locking part 48 ... opposite edge 81 ... lower end A ... attachment / detachment permission part B ... attachment / detachment restriction part L ... gap m ... major axis direction n ... minor axis direction S ... insertion / extraction port θ1 ... predetermined angle Δ ... gap

Claims (9)

The duct cover is rotatably supported at a position for opening and closing the opening of the cable duct via a shaft and a bearing,
An attachment / detachment permitting portion that allows attachment / detachment of the shaft with respect to the bearing within a range from a use position where the opening of the duct cover closes the opening to a predetermined angle between the shaft and the bearing, and an angle of the duct cover. A duct cover mounting structure provided with an attachment / detachment restricting portion for restricting attachment / detachment of the shaft to / from the bearing after reaching the predetermined angle. The duct cover mounting structure according to claim 1, wherein a stop portion is provided between the shaft and the bearing to give a rotation end when the duct cover reaches an upright angle. The attachment / detachment permitting part has a structure that allows the attachment / detachment of the shaft while elastically expanding the insertion / removal opening provided in a part of the bearing, and the attachment / detachment restricting part is provided between the shaft and the bearing after reaching a predetermined angle. The duct cover mounting structure according to claim 1 or 2, which constitutes a catching structure that suppresses elastic deformation of the insertion / removal port. The bearing has a locking portion inside the insertion / removal opening, and the shaft has a long axis direction and a short axis direction in the cross section, and the shaft that has passed through the insertion / removal opening along the long axis direction is rotated at the mounting position. The duct cover mounting structure according to claim 2 or 3, wherein both ends in the major axis direction are hooked on the locking portion. The shaft has in part a flat surface cut by a plane parallel to the shaft center, and constitutes a stop for stopping the shaft at that position by abutting the flat surface against the inner wall of the bearing at the end of rotation. The duct cover mounting structure according to claim 4. The opposite edges of the duct cover are supported at positions where the opening of the cable duct is closed via two shafts and a pair of bearings, and one shaft is opened from the bearing and the other shaft is supported by the bearing. The duct cover mounting structure according to any one of claims 1 to 5, wherein the duct cover can be rotated in any direction as it is, and a rotation permission portion and a rotation restriction portion are provided between the corresponding shaft and the bearing, respectively. The duct cover mounting structure according to any one of claims 1 to 6 is applied to a duct cover disposed on the counter-use end side of the top plate, and the duct cover is disposed at a position closing the opening of the cable duct. Desk. The desk according to claim 7, wherein a lower end portion of the desktop panel is positioned above the duct cover via a predetermined gap. The desk according to claim 7 or 8, wherein a gap that allows a finger to be inserted is secured between the edge of the duct cover and the counter-use end of the top plate.

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