JP2023061758A - Cover opening and closing unit - Google Patents

Abstract

To provide a cover opening and closing unit which facilitates opening and closing operation of a cover by using an arm.SOLUTION: A wiring hole cover unit 10 including a cover 12 for opening and closing a wiring hole 4a and an arm 14 connected to the cover 12 has a first rotating part 21 for rotatably pivoting one end of the arm 14 in the wiring hole 4a and a second rotating part 22 for rotatably pivoting the cover 12 at the other end of the arm 14 and is configured to shift between an opened state in which the cover 12 is open, a closed state in which the cover 12 is closed, and a half-opened state between the opened state and the closed state. In a state between the opened state and the half-opened state, only the first rotating part 21 out of the first rotating part 21 and the second rotating part 22 rotates to shift the state, and in a state between the half-opened state and the closed state, only the second rotating part 22 out of the first rotating part 21 and the second rotating part 22 rotates to shift the state.SELECTED DRAWING: Figure 8

Description

The present invention relates to a cover opening/closing unit.

In recent years, there has been proposed a cover opening/closing unit that is attached to an opening such as a wiring hole provided in a table or the like used in an office and has a cover for opening/closing the opening. A known cover opening/closing unit of this type has one or a plurality of arms rotatably supported in an opening, and a cover rotatably supported by the arms. there is

For example, Patent Literature 1 discloses a wiring box as a cover opening/closing unit having a rotating arm rotatably supported by a side cover in an opening, and a cover body rotatably supported by the rotating arm. ing. In this wiring box, when the lid changes between the open state and the closed state, both the rotating shaft of the rotating arm and the rotating shaft of the lid rotate, so that the lid is substantially vertical. It is configured to move up and down while maintaining the state.

JP 2012-186883 A

In the structure in which the rotating shaft of the rotating arm and the rotating shaft of the lid rotate simultaneously as in the above-described conventional cover opening/closing unit, if the frictional force associated with the rotation differs between the two rotating shafts, the larger the frictional force, the larger the frictional force. The opening/closing operation depends on the operation of the rotating shaft of the cover, which may interfere with the opening/closing operation of the cover. In addition, since a plurality of rotating shafts are rotated simultaneously, it may not be possible to easily open and close the cover.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cover opening/closing unit that facilitates the opening/closing operation of the cover while using an arm.

A cover opening/closing unit of the present invention is a wiring hole cover unit having a cover for opening and closing an opening and an arm connected to the cover, wherein one end of the arm is rotatably supported within the opening. a first rotating portion and a second rotating portion that rotatably supports the cover at the other end of the arm, wherein the open state in which the cover is open and the closed state in which the cover is closed; and a half-open state that is a state between the open state and the closed state, and between the open state and the half-open state, the first rotating portion and the second Of the rotating portions, only the first rotating portion rotates to shift the state, and between the half-open state and the closed state, the first rotating portion and the second rotating portion move between the half-open state and the closed state. It is characterized in that only the second rotating portion rotates to change the state.

According to the present invention, it is possible to provide a cover opening/closing unit that facilitates the opening/closing operation of the cover while using the arm.

It is the perspective view which looked at the table which attached the wiring hole cover unit which concerns on embodiment from diagonally upward. It is the perspective view which looked at the table which attached the wiring hole cover unit which concerns on embodiment from the diagonally downward direction. It is a perspective view in the closed state of the wiring hole cover unit which concerns on embodiment. It is a perspective view in the open state of the wiring hole cover unit which concerns on embodiment. It is a perspective view in the half-open state of the wiring hole cover unit according to the embodiment. It is a front view of the 1st wall part of the wiring hole cover unit which concerns on embodiment. It is an exploded perspective view of the wiring hole cover unit which concerns on embodiment, and the figure enclosed by the broken line is an enlarged view which expanded the roller part vicinity. FIG. 5 is a schematic diagram showing the trajectory of the cover in the wiring hole cover unit according to the embodiment;

Embodiments of the present invention will be described below with reference to the drawings. A wiring hole cover unit (cover opening/closing unit) 10 according to the embodiment is attached to, for example, a table 2 as shown in FIGS. 1 and 2 from the back side thereof. The table 2 is a table placed in an office or the like, and is composed of a top plate 4 and four legs 6 for supporting the top plate 4 and the like. A substantially rectangular wiring hole (opening) 4 a is provided in the substantially central portion of the top plate 4 of the table 2 for drawing out wiring (not shown) onto the top plate 4 . The wiring hole cover unit 10 is attached to the top plate 4 so as to close the wiring hole 4a.

The wiring hole cover unit 10 has a substantially box-like shape as shown in FIG. and a connected arm 14 . 3 shows a state in which the pair of covers 12 are closed (hereinafter referred to as "closed state"), and FIG. 4 shows a state in which the pair of covers 12 is open (hereinafter referred to as "open state"). Reference numeral 5 indicates a state in which one cover 12 is approximately half open (a state between an open state and a closed state; hereinafter referred to as a "half-open state"). In addition, in FIG. 5, the wall part (the 1st wall part 31 mentioned later) of this side is shown with the transparent view for description.

Each cover 12 is made of synthetic resin and has a flat rectangular upper surface portion 12a and flat side surface portions (side surfaces) 12b provided on both front and rear side surfaces of the upper surface portion 12a. In the following description, the vertical direction of the wiring hole cover unit 10 corresponds to the normal line direction of the upper surface portion 12a of each cover 12 in the closed state, and the front and rear direction of the wiring hole cover unit 10 corresponds to each cover 12 in the closed state. The lateral direction of the wiring hole cover unit 10 coincides with the lateral direction of the upper surface portion 12a of each cover 12 in the closed state.

On the upper surface portion 12a of one cover 12, a flexible rubber body 13 extending toward the other upper surface portion 12a is provided at the edge facing the upper surface portion 12a of the other cover 12 in the closed state. The rubber body 13 closes the gap between the upper surface portions 12a of the pair of covers 12 in the closed state. The contour shape and contour size of the pair of upper surface portions 12a and the rubber body 13 in the closed state as a whole substantially match the shape and size of the opening edge of the wiring hole 4a, and close the wiring hole 4a. ing. In addition, the rubber body 13 prevents dust and the like from entering the wiring hole cover unit 10 in the closed state, while allowing wiring and the like to be pulled out from the inside.

Each arm 14 is a synthetic resin member extending like an arm, and is connected to both sides of the cover 12 in the front-rear direction. That is, two arms 14 are connected to one cover 12, and the wiring hole cover unit 10 has four arms 14. As shown in FIG. One end of the arm 14 (the end not connected to the cover 12) is rotatably supported by the first rotating portion 21 in the wiring hole 4a. Both front and rear sides of each cover 12 are rotatably supported at the other end of the arm 14 (the end connected to the cover 12) by a second rotating portion 22 (see FIG. 5). there is

In the wiring hole cover unit 10, when each cover 12 moves around the first rotating portion 21, the two arms 14 connected to the cover 12 interlock. In addition, the wiring hole cover unit 10 is configured to be movable between an open state, a closed state, and a half-open state by turning the first turning portion 21 and the second turning portion 22 . The configuration of the first rotating portion 21 and the second rotating portion 22 will be described later in detail.

As shown in FIG. 4 and the like, the wiring hole cover unit 10 includes a pair of first wall portions (wall portions) 31 as side walls facing in the front-rear direction and a pair of second wall portions as side walls facing in the left-right direction. 32 and a bottom plate portion 34 as a bottom plate. Of these, the pair of first wall portions 31 are made of synthetic resin, for example, and the pair of second wall portions 32 and the bottom plate portion 34 are integrally formed by bending a plate-shaped sheet metal member into a U-shape, for example. formed The wiring hole cover unit 10 is substantially box-shaped with a pair of first wall portions 31, a pair of second wall portions 32, and a bottom plate portion 34, thereby forming an internal space S within the wiring hole 4a. (See FIG. 7). The internal space S accommodates wiring, a power tap, and the like.

As shown in FIG. 6, the lower portion of the first wall portion 31 is mostly formed into a rectangular opening 31a. Wires connected to an external power source or the like are routed from the bottom side of the table 2 to the internal space S of the wiring hole cover unit 10 through the opening 31a, for example. An upper portion of the first wall portion 31 is provided with a pair of recessed portions 31b that are recessed outward (toward the side opposite to the internal space S side) on both left and right sides. Each concave portion 31b has a first arc-shaped portion 31b1 curved outward in the left-right direction on the side surface of its lower portion, and a circular arc obliquely downward on the side surface of its upper portion. It has a second arcuate portion 31b2 curved in an arc.

A pair of wall-side shaft holes 31c in which a first shaft member 41 (to be described later) is pivotally supported is provided in a laterally parallel manner at a substantially central position between the pair of recesses 31b. Each wall-side shaft hole 31c is a circular hole penetrating in the front-rear direction, and the first shaft member 41 is inserted therethrough. Above the pair of wall-side shaft holes 31c, a convex portion 31d that protrudes inward (toward the internal space S) from the first wall portion 31 is provided. The convex portion 31d has a laterally long shape to cover the upper portion of the pair of wall-side shaft holes 31c. Further, the left and right lower end portions of the convex portion 31d are chamfered so as to be inclined upward toward the left and right sides, forming inclined surfaces 31d1.

A pair of cover restricting pieces 31e projecting inward (toward the internal space S) from the first wall portion 31 are provided on both sides of the convex portion 31d in the left-right direction and at positions close to the concave portion 31b. In addition, although the structure of one 1st wall part 31 was demonstrated above, the other 1st wall part 31 which opposes is the same structure.

As shown in FIG. 3 and the like, the upper end portions of the pair of second wall portions 32 are provided with flat plate-like protruding portions 32a that protrude outward in parallel. Each protruding portion 32a is formed by bending the upper end side of the second wall portion 32, for example. Each protruding portion 32a is provided with three mounting holes 32a1 at equal intervals on both front and rear sides and in the center thereof. Each attachment hole 32 a 1 is a through hole that extends from the plate surface of each projecting portion 32 a to the upper portion of the second wall portion 32 in an elongated manner.

A screw or the like is inserted through each mounting hole 32a1 from below. The wiring hole cover unit 10 can be attached to the table 2 by screwing the protrusions 32a from the back side of the top plate 4 of the table 2 to the opening edge of the wiring hole 4a. The height H (see FIG. 8) from the upper surface of each projecting portion 32a to the upper end portion of the first wall portion 31 is approximately equal to the thickness of the top plate 4 of the table 2 to which the wiring hole unit 10 is attached. By forming each protruding portion 32a in this manner, the upper surface portion 12a of the cover 12 and the upper surface of the top plate 4 to which the wiring hole cover unit 10 is attached can be made substantially uniform.

Next, configurations of the first rotating portion 21 and the second rotating portion 22 will be described with reference to FIG. 7 and the like. As shown in FIG. 7, one end of each arm 14 is provided with an arm-side first shaft hole 14a in which the first shaft member 41 is pivotally supported. Each arm-side first shaft hole 14a is a circular hole penetrating in the front-rear direction, and the first shaft member 41 is inserted therethrough. The first arm-side shaft hole 14a of each arm 14 is superimposed on the wall-side shaft hole 31c of the first wall portion 31, and the first shaft member 41, which is a shaft-like member, is inserted into the first arm-side shaft hole 14a and the wall-side shaft hole. 31 c , and screwed with a screw member or the like (not shown) that is screwed into the shaft portion of the first shaft member 41 from the opposite side of the first shaft member 41 , so that each arm 14 is attached to the first shaft member 41 . It is pivotally supported so as to be rotatable around an axis. That is, the first rotating portion 21 is configured by the wall-side shaft hole 31c, the arm-side first shaft hole 14a, the first shaft member 41, and the like.

Here, the convex portion 31d provided on the first wall portion 31 described above is positioned around the axis of the first rotating portion 21, and the projecting height thereof is the arm pivotally supported by the first wall portion 31. 14 in the vertical direction. Therefore, when the first rotating portion 21 rotates when the cover 12 is opened and closed, the arm 14 comes into contact with the inclined surface 31d1 of the convex portion 31d, so that the first rotating portion 21 rotates further. are now regulated.

As shown in FIG. 7, a pair of cover-side shaft holes 12c in which a second shaft member 42 (to be described later) is pivotally supported is provided at substantially the center position of the side surface portion 12b of each cover 12. As shown in FIG. Each cover-side shaft hole 12c is a circular hole penetrating in the front-rear direction, and the second shaft member 42 is inserted therethrough. Further, the other end of each arm 14 is provided with an arm-side second shaft hole 14b in which the second shaft member 42 is pivotally supported. Each arm-side second shaft hole 14b is a circular hole penetrating in the front-rear direction, and the second shaft member 42 is inserted therethrough.

The cover-side shaft hole 12c of the side surface portion 12b of each cover 12 is superimposed on the arm-side second shaft hole 14b of the arm 14, and the second shaft member 42, which is a shaft-like member, is inserted into the cover-side shaft hole 12c and the arm-side second shaft. Each cover 12 is attached to the second shaft member 42 by inserting it through the hole 14 b and screwing it with a screw member or the like (not shown) that is screwed into the shaft portion of the second shaft member 42 from the opposite side of the second shaft member 42 . is rotatably supported around the axis of That is, the second rotating portion 22 is configured by the second arm-side shaft hole 14b, the cover-side shaft hole 12c, the second shaft member 42, and the like.

Here, as shown in FIG. 7, in the vicinity of the cover-side shaft hole 12c, a cover restricting rib 12a1 extending like a rib from the back side of the upper surface portion 12a of the cover 12 along the side surface portion 12b is provided. A contact wall portion 12a2 extending like a wall from the back side of the upper surface portion 12a of the cover 12 along the side surface portion 12b is provided at a position opposite to the cover restricting rib 12a1 across the cover-side shaft hole 12c. there is When the cover 12 is opened and closed, the arm 14 abuts against the abutment wall portion 12a2, so that the angle θ (see FIG. 8) formed between the arm 14 and the upper surface portion 12a of the cover 12 is approximately 90°. Rotation is regulated so that it does not exceed °. Thus, the wiring hole cover unit 10 is configured so that the cover 12 is not opened too much.

Next, the manner of engaging the side surface portion 12b of the cover 12 with the first wall portion 31 will be described. As shown in the enlarged view of FIG. 7, the corners of both side surfaces 12b of each cover 12 are provided with roller-shaped roller portions 12d that protrude outward (to the side opposite to the internal space S side). The rotation axis of the roller portion 12 d is parallel to the first shaft member 41 of the first rotating portion 21 and the second shaft member 42 of the second rotating portion 22 .

The first arcuate portion 31b1 in the concave portion 31b of the first wall portion 31 is formed so that its radius of curvature is equal to the distance L1 (see FIG. 8) between the roller portion 12d and the first rotating portion 21. It is The second arcuate portion 31b2 in the recess 31b of the first wall portion 31 is formed so that its radius of curvature is equal to the distance L2 (see FIG. 8) between the roller portion 12d and the second rotating portion 22. It is

When the arm 14 and the cover 12 are attached to the first wall portion 31 , the side surface portion 12 b of each cover 12 has a front surface close to the first wall portion 31 . Each roller portion 12d provided on each side portion 12b is fitted into the recessed portion 31b of the first wall portion 31 facing each other between the closed state and the open state, and is engaged with the recessed portion 31b. Specifically, between the open state and the half-open state, each roller portion 12d rotates while contacting the first arcuate portion 31b1 of the recess 31b. Between the half-open state and the closed state, it rotates while contacting the second arcuate portion 31b2 of the recess 31b. The roller portion 12d functions as a guide roller that guides the side portion 12b of the cover 12 along the side surface of the recess 31b by rotating while contacting the side surface of the recess 31b when the cover 12 is opened and closed.

Next, operation modes of the cover 12 and the arm 14 accompanying the opening/closing operation of the cover 12 will be described with reference to FIG. In FIG. 8, four states among the trajectories of the one cover 12 and the arm 14 that transition between the open state and the closed state are illustrated by dashed lines. First, in the open state, the cover 12 is substantially perpendicular to the plate surface of the bottom plate portion 34, and the angle between the arm 14 and the upper surface portion 12a of the cover 12 is approximately 90°. In the open state, the roller portion 12d provided on the side surface portion 12b of the cover 12 is in contact with the lower portion of the first arcuate portion 31b1 of the recessed portion 31b.

When the cover 12 is slightly pulled upward from the open state, the arm 14 is pulled up together with the cover 12 and the first rotating portion 21 rotates. At this time, since the distance L1 between the roller portion 12d and the first rotating portion 21 is set equal to the radius of curvature of the first arc-shaped portion 31b1, the roller portion 12d can be moved without changing the distance L1. It moves upward while rotating along the first arcuate portion 31b1. In other words, only the first rotating portion 21 rotates while the angle between the arm 14 and the upper surface portion 12a of the cover 12 is maintained at approximately 90° without the second rotating portion 22 rotating. Rotate.

When the cover 12 is pulled up further, the arm 14 is pulled up together with the cover 12 and the first rotating portion 21 rotates further, and the side surface of the arm 14 interferes with the inclined surface 31d1 of the convex portion 31d of the first wall portion 31. and abut. At this time, similarly to the above, only the first rotating portion 21 of the first rotating portion 21 and the second rotating portion 22 rotates, and the roller portion 12d rotates along the first arcuate portion 31b1. while moving upwards. Then, the roller portion 12d is positioned at the boundary between the first arcuate portion 31b1 and the second arcuate portion 31b2. At this time, the cover 12 is about half open, and the arm 14 is in contact with the inclined surface 31d1 of the projection 31d. This state is called a half-open state.

Even if the cover 12 is to be pulled upward from the half-open state, the arm 14 is in contact with the inclined surface 31d1 of the convex portion 31d, so that the first rotating portion 21 cannot be rotated upward any more. However, the cover 12 cannot be pulled upward. Therefore, only the second rotating portion 22 is rotated by pushing down the raised upper portion of the cover 12 toward the center of the wiring hole 4a so as to close the wiring hole 4a from the half-open state. Then, each cover 12 rotates and the tip of the cover restricting rib 12a1 comes into contact with the cover restricting piece 31e of the first wall portion 31, so that the upper surface portion 12a of the cover 12 is moved against the plate surface of the bottom plate portion . A substantially parallel state is established, and further rotation of the cover 12 is restricted. As a result, the wiring hole cover unit 10 can be closed.

When the state is shifted from the half-open state to the closed state, the distance L2 between the roller portion 12d and the second rotating portion 22 is equal to the radius of curvature of the second arcuate portion 31b2. Without change, the roller portion 12d moves laterally outward while rotating along the second arcuate portion 31b2. Therefore, even if the first rotating portion 21 is not rotated while being in contact with the convex portion 31d (even if the distance L2 does not change), by rotating only the second rotating portion 22, the half-open state can be achieved. A state transition can be made from the state to the closed state. As described above, the roller portion 12d guides the cover 12 along the trajectory of the side portion 12b of the cover 12 that changes between the open state and the closed state.

It should be noted that the state transition from the closed state to the open state can be performed by the reverse procedure of the above. That is, in the closed state, only the second rotating portion 22 of the first rotating portion 21 and the second rotating portion 22 is moved by pulling up the end portions of the pair of covers 12 facing each other at the upper surface portions 12a. Rotate. As a result, the roller portion 12d moves along the second arcuate portion 31b2 and shifts to the half-open state. Thereafter, by pushing down the half-opened cover 12, only the first rotating portion 21 of the first rotating portion 21 and the second rotating portion 22 is rotated. As a result, the roller portion 12d moves along the first arcuate portion 31b1 and shifts to the closed state.

As described above, the wiring hole cover unit 10 according to this embodiment is configured to be able to shift between the open state, the closed state, and the half-open state. 21 and the second rotating portion 22, only the first rotating portion 21 rotates (in other words, only the arm 14 rotates) to shift the state, and between the half-open state and the closed state, Of the first rotating portion 21 and the second rotating portion 22, only the second rotating portion 22 rotates (in other words, only the cover 12 rotates) to shift the state. Therefore, in the wiring hole cover unit 10 , the opening and closing operations of the cover 12 can be performed smoothly while using the arm 14 without rotating a plurality of rotating shafts simultaneously during the opening and closing operations of the cover 12 .

Further, in the wiring hole cover unit 10, the first wall portion 31 positioned in the wiring hole 4a is provided with a convex portion 31d projecting inwardly around the axis of the first rotating portion 21, and the closed state and the half-open state are provided. , the state is changed while the arm 14 is in contact with the convex portion 31d. Therefore, between the closed state and the half-open state, the first rotating portion 21 serving as the rotating shaft of the arm 14 does not rotate, and only the second rotating portion 22 rotates between the half-open state and the closed state. A specific configuration for moving can be realized.

In the wiring hole cover unit 10, a first wall portion 31 having a concave portion 31b recessed outward is provided in the wiring hole 4a. The concave portion 31b guides the cover 12 along the trajectory of the side portion 12b of the cover 12 that changes between the closed state and the open state. In this way, when the cover 12 is opened and closed, the roller portion 12d functions as a guide roller for guiding the side surface portion 12b of the cover 12 and moves within the concave portion 31b, so that the cover 12 can be opened and closed more smoothly. can.

Further, in the wiring hole cover unit 10, the concave portion 31b is formed in a first circular arc shape on the side surface so that the radius of curvature is equal to the distance between the roller portion 12d and the first rotating portion 21. It has a portion 31b1 and a second arcuate portion 31b2 which is arcuately formed so that the radius of curvature is equal to the distance between the roller portion 12d and the second rotating portion 22 . As a result, at the boundary portion between the first arcuate portion 31b1 and the second rotating portion 22, only the first rotating portion 21 rotates in the state transition between the open state and the half-open state, and the state between the half-open state and the closed state. It is possible to smoothly switch between the rotation of only the second rotating portion 22 in the transition and the rotation. Therefore, workability in opening and closing the cover 12 can be further improved.

It should be noted that the embodiments described above are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and its equivalents.

2 table 4 top plate 4a wiring hole 6 leg 10 wiring hole cover unit 12 cover 12a top surface 12a1 cover regulation rib 12a2 contact wall 12b side surface 12c cover side shaft hole 12d roller 13 rubber body 14 arm 14a arm side first 1 shaft hole 14b arm side second shaft hole 21 first rotating portion 22 second rotating portion 31 first wall portion 31a opening 31b recess 31b1 first circular arc portion 31b2 second circular arc portion 31c wall side shaft hole 31d Convex portion 31e Cover regulation piece 32 Second wall portion 32a Protruding portion 32a1 Mounting hole 34 Bottom plate portion 41 First shaft member 42 Second shaft member H Height S Internal space L1 Distance L2 Distance θ Angle

Claims (4)

A cover opening/closing unit having a cover for opening and closing an opening and an arm connected to the cover,
a first rotating portion that rotatably supports one end of the arm in the opening;
a second rotating portion that rotatably supports the cover at the other end of the arm;
configured to be able to transition between an open state in which the cover is open, a closed state in which the cover is closed, and a half-open state that is a state between the open state and the closed state;
between the open state and the half-open state, only the first rotating portion of the first rotating portion and the second rotating portion rotates to shift the state;
Between the half-open state and the closed state, only the second rotating portion of the first rotating portion and the second rotating portion rotates to shift the state.
A cover opening/closing unit characterized by: A convex portion protruding inwardly around the axis of the first rotating portion is provided in the opening,
2. The cover opening/closing unit according to claim 1, wherein the state transition between the closed state and the half-open state is performed while the arm is in contact with the projection. A wall portion having a recess recessed outward is provided in the opening,
A roller-shaped roller portion that protrudes outward and engages with the recess is provided on the side surface of the cover,
3. The cover opening/closing unit according to claim 1, wherein the roller portion guides the cover along a trajectory of the cover that transitions between the open state and the closed state. The concave portion has a first arc-shaped portion formed in a side surface thereof so that the curvature radius is equal to the distance between the roller portion and the first rotating portion, and the curvature radius is the roller portion. 4. The cover opening/closing unit according to claim 3, further comprising: a second arcuate portion formed in an arc so as to be equal to the distance between the second rotating portion and the second rotating portion.

Images