JP2020069331A - Fixture - Google Patents

Abstract

To provide a fixture in which a rotation body is always stably supported on a substrate and in which rotational operation of the rotation body can be easily performed, in a fixture in which a rotation body such as a top board is rotatably supported on a substrate like a leg part.SOLUTION: A leg part 2 (substrate) is provided with an abutment face 522 that comes into contact from a lower side with a top board (rotation body) which is a first posture. A rotation mechanism 4 includes a link part 7 that is rotatably supported in one end on the leg part 2 and a guide part 61 that is formed in the top board and that movably support the other end of the link part 7 along an extension direction. The guide part 61 has a first end that is situated in one end of the extension direction and a second end that is situated in the other end. With the first posture, the guide part 61 horizontally extends and the link part 7 has the other end situated on the first end side. With the second posture, the guide part 61 has the first end situated on the upper side, has the second end situated on the lower side, and vertically extends, while the link part 7 has the other end situated on the second end side.SELECTED DRAWING: Figure 4

Description

  The present invention relates to furniture.

  BACKGROUND ART Conventionally, there is known a table in which a top plate supported by legs is rotated with respect to the legs and is capable of switching between a first posture when in use and a second posture when not in use (for example, patents). References 1 and 2). In the table disclosed in Patent Document 1, a top plate is configured to be rotatable around a horizontal axis of a support piece provided on a leg portion, and a locking pin provided on the top plate has a first posture and a second posture. Is configured to restrain the rotation of the top plate by being locked in the locking groove of the support piece.

  In the table disclosed in Patent Document 2, the top plate is configured to be rotatable about a horizontal axis provided on the legs, and one end is rotatable about the axis provided on the top plate. The other end has a link part slidable along a vertically extending groove provided in the leg part. The groove is formed with a recessed portion capable of locking the pin provided in the link portion, and the pin is locked in the recessed portion when the top plate is in the first posture and the second posture, and thus the top plate is locked. It is configured to restrain the rotation of the. In such a table, the legs are supported via the shaft portion and the link portion of the top plate.

Japanese Patent No. 4567868 Utility model registration No. 258829

  However, in the table disclosed in Patent Document 1, the locking pin that has been separated from the locking groove when the top plate rotates to the first posture or the second posture enters the locking groove. is there. Therefore, the locking pin and the locking groove are shielded from each other so that foreign matter is not caught between the locking pin and the locking groove and cannot be rotated. In order to reduce the size of the shielding member that shields the locking pin and the locking groove, it is necessary to reduce the distance between the locking groove and the locking pin. There is a need to.

On the other hand, in the table disclosed in Patent Document 2, the other end of the link portion moves along the groove portion, and the other end of the link portion is always inserted into the groove portion, and therefore disclosed in Patent Document 1. The design accuracy for rotating and fitting the separated members such as the separated table is not necessary.
By the way, in the table disclosed in Patent Document 2, in the second posture, a moment in the direction of returning from the second posture to the first posture is generated due to the weight of the top plate. Further, in the table disclosed in Patent Document 2, the groove portion extends in the vertical direction, and in the second posture, the pin of the link portion is located at the upper end portion of the groove portion.
Therefore, when the top plate is changed from the second posture to the first posture, the above-mentioned moment causes the pin of the link portion to easily move downward along the groove portion. As a result, when the lock for maintaining the second posture in the second posture is released in order to bring the second posture into the first posture, there is a risk that the top plate will rotate immediately.

  Therefore, in the present invention, in a fixture in which a rotating body such as a top plate is rotatably supported by a supporting body such as a leg portion, the rotating body is always supported by the supporting body in a stable state, and the rotating body rotates. It is an object of the present invention to provide a fixture that can easily perform an operation work.

  In order to achieve the above object, the furniture according to the present invention includes a support body, a rotation body rotatably supported by the support body around a first shaft portion, and the rotation body, the rotation body lying down. A rotating mechanism that rotates between a first posture and a second posture in which the rotating body is erected, and the support body contacts the rotating body in the first posture from below. A link portion having a contact surface, the rotation mechanism being rotatably supported around a second shaft portion arranged at the support body so that one end thereof is parallel to the first shaft portion; A guide portion formed on the rotating body, extending in an extending direction orthogonal to the first shaft portion and the second shaft portion, and supporting the other end of the link portion so as to be movable along the extending direction; And the guide portion has a first end located at one end in the extending direction and a second end located at the other end. When the rotating body is in the first posture, the guide portion extends horizontally, the other end of the link portion is located on the first end side, and when the rotating body is in the second posture, The guide part has the first end located on the upper side, the second end located on the lower side, and extends in the up-down direction, and the link part has the other end located on the second end side. And

In the present invention, since the guide portion is formed on the rotating body, the extending direction changes as the rotating body rotates, and the extending direction does not always become the vertical direction. As a result, the moving speed of the other end of the link portion in the extending direction becomes slower than in the case where the extending direction of the guide portion is always the vertical direction, so that the rotating body in the second posture rapidly rotates. The rotating body is always supported by the support body in a stable state. Further, since the rotating body is always supported in a stable state by the supporting body, the rotating work of the rotating body can be easily performed.
In addition, since the first shaft portion that supports the rotating body and the second shaft portion that supports the rotating body via the link portion are both provided in parallel to the support body, the position where the rotating body is supported in the support body Are always the same two points (first shaft portion and second shaft portion), and the rotating body is supported by the support body in a stable state. The triangle formed by the three points at the other ends of the first shaft portion, the second shaft portion, and the link portion is always the same position of the two points (first shaft portion, second shaft portion).
Further, since the support body has the contact surface that comes into contact with the rotating body in the first posture from the lower side, the rotating body in the first posture can contact and support from the lower side. Therefore, when the rotating body is in the first posture, the load of the rotating body acting on the rotating mechanism can be reduced.

Further, in the furniture according to the present invention, when the rotating body is in at least one of the first posture and the second posture, the other end of the link portion is moved in the extending direction with respect to the guide portion. You may have the 1st locking part to control.
With such a configuration, the rotating body can be maintained in the first posture or the second posture.

Further, in the furniture according to the present invention, the guide portion has a guide groove portion that is formed along the extending direction and is movable by inserting the other end of the link portion, and the first lock portion includes: The other end of the link portion is inserted when the rotating body projects from the guide groove portion in a direction intersecting the extending direction and is in at least one of the first posture and the second posture. It may have a restriction groove part for restricting the movement of the other end in the extending direction.
With such a configuration, by moving the other end of the link portion along the guide groove portion, the other end of the link portion can be moved in the extending direction, and the other end of the link portion is formed into the regulating groove portion. By inserting it, the movement of the other end of the link part in the extending direction can be restricted. In this way, the movement of the other end of the link portion in the extending direction and the switching between the regulation can be easily performed with a simple structure.

Also, in the furniture according to the present invention, the first lock portion locks the other end of the link portion when the rotating body is in at least one of the first posture and the second posture. It may have a regulation locking portion that regulates the movement of the other end of the link portion in the extending direction.
With such a configuration, the movement of the other end of the link portion in the extending direction can be reliably regulated.

Further, in the furniture according to the present invention, the regulation locking portion causes the other end of the link portion located at the second end of the guide portion to face downward when the rotating body is in the second posture. The movement of the other end of the link part toward the first end side of the guide part may be restricted by urging.
With such a configuration, the movement of the other end of the link portion can be reliably regulated, and the rotating body can be maintained in the second posture.

Further, in the furniture according to the present invention, the regulation locking portion may be configured to be switchable between locking and releasing of the other end of the link portion by displacing in the extending direction.
With such a configuration, since the displacement direction of the regulation locking portion can be set to the direction in which the guide portion extends, compared with the case where the regulation locking portion is displaced in the direction intersecting the guide portion. It is possible to reduce the installation space for the regulation locking portion.

Further, the furniture according to the present invention may have a housing portion that is provided on the rotating body and that houses the link portion and the guide portion in the first posture.
With such a configuration, since the link portion and the guide portion are not exposed when the rotating body is in the first posture, it is possible to prevent a person or an object from coming into contact with the link portion and the guide portion.

Further, in the furniture according to the present invention, it is provided on the rotating body, is configured to be engageable with the support body when the rotating body is in the first posture, and engages the support body when the support body is engaged. It has a 2nd lock part which controls rotation around the 1st axis part, and the 2nd lock part is constituted so that it may engage with the above-mentioned support by contacting the above-mentioned support from the lower side. Good.
With such a configuration, the rotating body can be maintained in the first posture by the second lock portion.

  According to the present invention, in a fixture in which a rotating body such as a top plate is rotatably supported by a supporting body such as a leg portion, the rotating body is always supported by the supporting body in a stable state, and the rotating body is rotated. It is possible to easily perform the operation work.

It is a perspective view showing an example of a state where the furniture according to the first embodiment of the present invention is in the first posture. FIG. 6 is a perspective view showing an example of a state in which the furniture according to the first embodiment of the present invention is in the second posture. It is a perspective view which shows the rotation mechanism of a 1st posture. It is a perspective view which shows the rotation mechanism of a 1st posture. It is the figure which abbreviate | omitted the frame of FIG. It is a perspective view of a guide part. It is a perspective view of an operation part. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is CC sectional view taken on the line of FIG. It is the DD sectional view taken on the line of FIG. FIG. 6 is a view for explaining the rotating mechanism during operation, as viewed from one side in the width direction. FIG. 6 is a diagram illustrating a rotating mechanism in operation, as viewed from the other side in the width direction. FIG. 6 is a view for explaining the rotating mechanism during operation, as viewed from one side in the width direction. FIG. 6 is a diagram illustrating a rotating mechanism in operation, as viewed from the other side in the width direction. It is a perspective view showing an example of a state where the furniture with a top according to the embodiment of the present invention is in the first posture. It is a perspective view showing an example of a state where the furniture with a top plate according to the embodiment of the present invention is in the second posture. It is a perspective view which abbreviate | omitted the top plate main body of FIG. It is a perspective view which abbreviate | omitted the top plate main body of FIG. It is a perspective view which abbreviate | omitted the cover part of FIG. It is a perspective view of a top plate attachment part. It is the perspective view seen from the other direction of the top plate attachment part. It is a bottom view of a cover part. It is the EE sectional view taken on the line of FIG. It is a perspective view of a link part. It is sectional drawing corresponding to the FF line of FIG. It is sectional drawing corresponding to the GG line of FIG. It is sectional drawing corresponding to the HH line of FIG. It is a perspective view of a locking part. It is a perspective view of the locking portion in the other direction. It is a perspective view of a movable part. It is a perspective view of the other direction of a movable part. (A) is a perspective view of a 1st control part, (b) is the II sectional view taken on the line of (a), (c) is the JJ sectional view taken on the line of (a). It is a K direction arrow line view of FIG. FIG. 17 is a view in the direction of the arrow L in FIG. 16. It is a figure which shows a mode that the operation lever corresponding to FIG. 28 was operated. FIG. 20 is a cross-sectional view corresponding to line MM in FIG. 19, showing a state immediately before a second posture immediately before the second pin enters the restriction groove portion. FIG. 20 is a cross-sectional view corresponding to line MM in FIG. 19 and is a view showing a state of a second posture in which the second pin has entered the restriction groove portion. FIG. 38 is a diagram showing a state where the operation lever corresponding to FIG. 37 is operated. FIG. 40 is a partially enlarged view of FIG. 39.

Hereinafter, the furniture according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 15.
As shown in FIG. 1, the furniture 1 according to the first embodiment includes a leg portion 2 (support body) installed on the floor and a top plate 3 (rotating body) rotatably supported with respect to the leg portion 2. And a rotation mechanism 4 that rotatably supports the top plate 3 with respect to the legs 2, and the posture of the top plate 3 can be switched.
The top plate 3 includes a flat-plate-shaped top plate main body 31 and a rotating portion 6 provided on one surface of the top plate main body 31. The top plate 3 is rotatable about a rotation axis extending in the horizontal direction, and the top surface of the top plate main body 31 shown in FIG. It is configured to be switchable between a second posture in which the plate surface is a substantially vertical surface and an upright second posture. The rotating portion 6 is fixed to the lower surface of the top plate main body 31 in the first posture. The rotating unit 6 is configured to be rotatable with respect to the legs 2 together with the top plate body 31.
When the top plate 3 is in the first position, the user can work on the upper surface of the top plate 3, and in the second position, the user cannot use the top plate 3. The top plate 3 is designed to be in the second posture when the table is stored, for example.

The direction in which the rotation axis of the top plate 3 extends is the width direction, and the horizontal direction orthogonal to the width direction is the front-back direction. As shown in FIGS. 1 and 2, when the top plate 3 changes from the first posture to the second posture, the edge portion on one side in the front-rear direction in the first posture faces upward, and the other in the front-rear direction in the first posture. The edge of the side rotates so as to face downward. One side in the front-rear direction is the front side and the other side is the rear side.
In the following description of members and mechanisms, the top plate 3 is assumed to be in the first posture.

The top plate main body 31 is formed in a flat plate shape having a rectangular plate surface, and each edge portion is arranged so as to extend in the width direction and the front-rear direction.
The leg portion 2 has a base portion 21 installed on the floor, a pillar portion 22 extending upward from the base portion 21, and a support portion 5 fixed to an upper end portion of the pillar portion 22. In the furniture 1 of the present embodiment, one leg 2 supports the top plate 3, and this one leg 2 is connected to the center of the plate surface of the top plate 3.
Details of the support portion 5 and the rotating portion 6 will be described later.

  As shown in FIGS. 1 to 4, the rotation mechanism 4 includes a link portion 7 that is provided between the support portion 5 and the rotation portion 6 and that follows the rotation of the rotation portion 6, and a rotation portion 6. It has a guide portion 61 that is provided to support the link portion 7 so as to be movable in the front-rear direction, and an operation portion 62 that switches between permission and restriction of rotation of the rotation portion 6.

As shown in FIG. 4 and FIG. 5, the support portion 5 is provided on the bottom plate portion 51 fixed to the upper end portion of the pedestal portion 22 and on both sides of the bottom plate portion 51 in the width direction and protrudes upward from the bottom plate portion 51. And a pair of side wall portions 52.
The bottom plate portion 51 is longer in the width direction than in the front-rear direction and has a symmetrical shape in the width direction. The bottom plate portion 51 has a center portion in the width direction fixed to the upper end portion of the pedestal portion 22.

As shown in FIG. 4, in the pair of side wall portions 52, the wall surfaces are oriented in the width direction and extend in the front-rear direction. The pair of side wall portions 52 have a shape symmetrical to each other in the width direction.
The upper end surfaces 522 of the pair of side wall portions 52 are flat horizontal surfaces. The upper end surfaces 522 of the pair of side wall portions 52 are contact surfaces that contact the rotating portion 6 of the top plate 3 from below when the top plate 3 is in the first posture. Below, the upper end surfaces 522 of the pair of side wall portions 52 are referred to as contact surfaces 522, respectively.
The rear end portions of the pair of side wall portions 52 project rearward from the rear end portions of the bottom plate portion 51. The front end portions of the pair of side wall portions 52 are aligned with the front end portions of the bottom plate portion 51 in the front-rear direction. Notch portions 521 are formed on the lower side of the front end portions of the pair of side wall portions 52 and open to the front side, the lower side, and the outer side in the width direction (the side where the pair of side wall portions 52 are separated from each other). The pair of side wall portions 52 is formed with a downward surface 521a which is located above the cutout portion 521 and faces the lower cutout portion 521.

The pair of side wall portions 52 are provided with a first shaft portion 53 that rotatably supports the rotating portion 6 and a second shaft portion 54 that rotatably supports the link portion 7.
The first shaft portion 53 is attached to a portion projecting rearward of the bottom plate portion 51 in the vicinity of the rear end portion of each of the pair of side wall portions 52. The first shaft portion 53 is provided so as to penetrate the side wall portion 52 in a direction in which the axis 531 extends in the width direction. The first shaft portion 53 provided on each of the pair of side wall portions 52 is coaxial.

  The second shaft portion 54 is attached to the front side of the pair of side wall portions 52, which is intermediate in the front-rear direction and spaced apart from the first shaft portion 53. The second shaft portion 54 is provided so as to penetrate the side wall portion 52 in a direction in which the axis 541 extends in the width direction. The second shaft portion 54 provided on each of the pair of side wall portions 52 is coaxial. The first shaft portion 53 and the second shaft portion 54 are arranged such that their axes 531 and 541 are parallel to each other at the same height.

As shown in FIG. 6, the guide portion 61 is an elongated member having an L-shaped cross section, and is fixed to the lower surface of the top plate body 31 (see FIG. 1) in a direction extending in the front-rear direction. As shown in FIGS. 3 and 5, two guide portions 61 are provided at intervals in the width direction.
The two guide portions 61 are formed in a shape that is symmetrical in the width direction. FIG. 6 shows the guide portion 61 arranged on one side in the width direction of the two guide portions 61.

The guide portion 61 has a first plate portion 611 that is one piece of an L-shaped cross section and a second plate portion 612 that is the other piece. In the guide part 61, the first plate part 611 is in surface contact with the lower surface of the top plate body 31, and the second plate part 612 is from the inner side in the width direction of the first plate part 611 (the side where the two guide parts 61 face each other). It is fixed to the top plate body 31 so as to project downward.
The first plate portion 611 is formed with a hole portion through which a fixing tool such as a screw for fixing the guide portion 61 to the top plate body 31 is inserted.

  The distance between the two guide portions 61 fixed to the top plate body 31 is set to be slightly smaller than the distance between the two side wall portions 52. When the top plate 3 is in the first posture, the first plate portion 611 of each of the two guide portions 61 is arranged on the side wall portion 52, and the second plate portion 612 of each of the two guide portions 61 has the width of the side wall portion 52. It is arranged along the inner surface of the direction. When the top plate 3 is in the first posture, the two guide portions 61 are arranged at positions on the front side of the first shaft portion 53 and adjacent to the second shaft portion 54 in the width direction.

The second plate portion 612 is formed with a groove portion 64 that penetrates in the width direction and extends in the front-rear direction.
The groove portion 64 is a first linear groove portion 641 located on the front side and extending linearly in the front-rear direction, and a first inclined groove portion extending obliquely downward from the rear end of the first linear groove portion 641 toward the rear side. 642, a second linear groove portion 643 that linearly extends rearward from the lower end of the first inclined groove portion 642, and a second linear groove portion 643 that extends diagonally upward from the rear end portion of the second linear groove portion 643 toward the rear side. And two inclined groove portions 644.

The first inclined groove portion 642, the second linear groove portion 643, and the second inclined groove portion 644 are arranged so as to draw a C-shape that opens upward. A portion of the second plate portion 612, which is surrounded by the first inclined groove portion 642, the second linear groove portion 643, and the second inclined groove portion 644 and protrudes downward, is referred to as a protruding plate portion 647. Further, a portion of the second plate portion 612 that is on the rear side of the second inclined groove portion 644 is referred to as a rear plate portion 648.
A second pin (described later) of the link portion 7 is inserted into the groove 64, and the second pin is configured to move along the groove 64.

Of the groove portion 64, the first linear groove portion 641, the first inclined groove portion 642, and the second linear groove portion 643 form a guide groove portion 645 in which the second pin moves when the top plate 3 rotates, and the second inclined portion. The groove portion 644 is configured with a restriction groove portion 646 that restricts the movement of the second pin in the front-rear direction when the second pin is inserted. In the present embodiment, the front end portion 645a of the guide groove portion 645 corresponds to the first end of the guide portion of the present invention, and the restriction groove portion 646 corresponds to the second end of the guide portion of the present invention.
In the present embodiment, the rear side of the guide groove portion 645 (the first inclined groove portion 642 and the second linear groove portion 643) is located below the front side (the first linear groove portion 641). Even when the straight groove portion 641 is formed at the center in the up-down direction with respect to the second plate portion 612 of the guide portion 61, the vertical dimension of the restriction groove portion 646 extending obliquely upward from the rear end portion of the guide groove portion 645 is set. It can be greatly secured.

  The direction in which the first linear groove portion 641 of the guide portion 61 extends is the extension direction. The extending direction is the front-back direction when the top plate 3 is in the first posture, and the vertical direction when the top plate 3 is in the second posture. The extending direction changes from the front-back direction to the substantially vertical direction or from the vertical direction to the substantially front-back direction as the top plate 3 rotates. In the present embodiment, the extending direction is a direction along the top plate (top body 3) regardless of the posture of the top plate 3.

  The guide portion 61 is formed with an operation portion restricting groove portion 613 extending in the front-rear direction at an intermediate portion in the front-rear direction at a connecting portion between the first plate portion 611 and the second plate portion 612. The operation portion restriction groove portion 613 is configured such that a protrusion piece 665 of the operation portion 62, which will be described later, is inserted into the operation portion restriction groove portion 613 to restrict displacement of the operation portion 62 in the front-rear direction.

As shown in FIG. 5, the operation portion 62 includes a main body portion 65 that is movable in the front-rear direction with respect to the guide portion 61, and a biasing portion 621 that biases the main body portion 65 rearward with respect to the guide portion 61. ,have.
As shown in FIG. 7, the main body part 65 is a connection that connects a pair of front-rear extension parts 66 extending in the front-rear direction and provided at intervals in the width direction, and front end parts of the pair of front-rear extension parts 66. And a section 67.
The pair of front-rear extending portions 66 are formed symmetrically to each other in the width direction.

  The front-rear extending portion 66 is formed in a long flat plate shape, extends in the front-rear direction, and is arranged in a direction in which the plate surface becomes a horizontal plane, and an inner edge portion in the width direction of the upper plate portion 661. A side plate portion 662 extending downward from the whole and having a plate surface facing the width direction; and a lower protrusion portion 663 protruding downward from an outer edge region in the width direction at an intermediate portion of the upper plate portion 661 in the front-rear direction. ,have. The side plate portion 662 and the lower protruding portion 663 are separated from each other in the width direction.

The middle portion of the upper plate portion 661 in the front-rear direction protrudes outward in the width direction rather than the front side and the rear side thereof. An inner edge portion in the width direction of the upper plate portion 661 extends linearly in the front-rear direction.
An intermediate portion of the upper plate portion 661 in the front-rear direction is a widened portion 664. A portion of the upper plate portion 661 on the front side of the widened portion 664 is formed to have the same width dimension over the entire front-rear direction.

A portion of the upper plate portion 661 on the rear side of the widened portion 664 is formed to have the same width dimension over the entire front-rear direction. A portion of the upper plate portion 661 on the rear side of the widened portion 664 is formed to have a width dimension smaller than that of the front portion of the widened portion 664. A projecting piece 665 that projects upward is provided at a rear portion of the upper plate portion 661 with respect to the widening portion 664, in an intermediate portion in the front-rear direction. The front-rear dimension of the projecting piece 665 is set smaller than the front-rear length dimension of the operation portion restriction groove 613.
The protruding piece 665 is configured to be displaceable in the front-rear direction within the length range of the operation-portion restricting groove portion 613 in the front-rear direction while being inserted in the operation-portion restricting groove portion 613.

The side plate portion 662 is provided on the rear side with a first protrusion 666 (first lock portion, regulation locking portion) and a second protrusion 667 that protrude downward. The first protrusion 666 is arranged on the front side of the second protrusion 667.
The lower edge portion of the side plate portion 662 extends from the first projecting portion 666 in a front-rear direction to a first linear edge portion 681 that extends linearly in the front-rear direction, and from the rear end portion of the first linear edge portion 681 to the rear side. First sloping edge portion 682 that extends gradually downward, a second linear edge portion 683 that extends rearward from the lower end portion of the first inclined edge portion 682, and an upper side and rearward portion from the rear end portion of the second linear edge portion 683. A curved edge portion 684 that curves outwardly toward the side position, a second inclined edge portion 685 that gradually extends downward from the rear end portion of the curved edge portion 684 toward the rear side, and a second inclined edge. The third linear edge portion 686 linearly extends rearward from the lower end portion of the portion 685.
The first protrusion 666 is surrounded by the first inclined edge 682, the second straight edge 683, and the curved edge 684. The first protruding portion 666 is surrounded by the second inclined edge portion 685, the third straight edge portion 686, and the rear edge portion of the side plate portion 662.

As shown in FIG. 5, a second lock portion 69 extending rearward is attached to a lower end portion of the lower protruding portion 663. The second lock portion 69 is configured to be insertable into the cutout portion 521 of the side wall portion 52 of the support portion 5 when the top plate 3 is in the first posture. When the second lock portion 69 is inserted into the cutout portion 521, the second lock portion 69 is downwardly directed to the downward surface 521a of the pair of side wall portions 52 (the surface located above the cutout portion 521 and facing the lower cutout portion 521). Are configured to come into contact with each other.
When the second lock portion is inserted into the cutout portion 521 and comes into contact with the downward surface 521a from below, the operation portion 62 cannot move upward and the top plate 3 fixed to the operation portion 62 is maintained in the first posture. Is configured to be.

  The connecting portion 67 is formed in an elongated shape extending in the width direction, and the front-rear extending portions 66 are connected to both ends in the width direction. A handle portion 672 is provided at an intermediate portion in the width direction of the connecting portion 67 so as to project rearward and downward so that an operator can hold his / her hand.

  As shown in FIG. 5, in the operation portion 62, the front-rear extension portion 66 on one side in the width direction of the pair of front-rear extension portions 66 has the first plate portion 611 of the guide portion 61 on the one side in the width direction. The first and second plate portions in the width direction of the guide portion 61 on the other side in the width direction. It is arranged so as to overlap the lower side of 611 and the other side in the width direction of the second direction.

  The protruding piece 665 of the operation portion 62 is inserted into the operation portion restriction groove portion 613 of the guide portion 61. As described above, the protruding piece 665 is configured to be displaceable in the front-rear direction within the length range of the operation-portion restricting groove portion 613 in the front-rear direction while being inserted in the operation-portion restricting groove portion 613. Therefore, the range of movement of the operation portion 62 in the front-rear direction with respect to the guide portion 61 of the main body portion 65 corresponds to the movement range of the protrusion piece 665 inserted in the operation portion regulation groove 613 in the front-rear direction.

Since the body portion 65 of the operation portion 62 is biased rearward with respect to the guide portion 61 by the biasing portion 621, the protruding piece 665 is normally arranged at the rear end portion of the restriction groove portion 646. Then, the body portion 65 is moved to the front side with respect to the guide portion 61 by gripping the handhold portion 672 and pulling the body portion 65 to the front side with respect to the guide portion 61. The main body portion 65 moves to the front side to a position where the protruding portion comes into contact with the front end portion of the restriction groove portion 646.
A state in which the main body portion 65 is biased to the rear side is referred to as a non-operating state, and a state in which the main body portion 65 is pulled toward the front side is referred to as an operating state.

As shown in FIGS. 8 and 9, the side plate portion 662 of the front-rear extension portion 66 is located above the groove portion 64 of the guide portion 61. 8 to 15, the bottom plate portion 51 and the side wall portion 52 of the support portion 5 and the frame portion 63 of the rotating portion 6 are omitted for the sake of explanation.
In both the operated state and the non-operated state, the side plate portion 662 of the front-rear extension portion 66 does not overlap the guide groove portion 645 in the width direction and partially overlaps the restriction groove portion 646 in the width direction. ..
A portion of the side plate portion 662 on the front side of the first protruding portion 666 is located above the guide groove portion 645.

  The first protruding portion 666 of the side plate portion 662 is located above the second linear groove portion 643 of the guide groove portion 645 and in front of the restriction groove portion 646. In the non-operated state, the first projecting portion 666 has a projecting plate portion 647 of the second plate portion 612 of the guide portion 61 (above the second linear groove portion 643 of the guide groove portion 645 in the second plate portion 612 and except for the trailing edge portion). It is arranged at a position overlapping the width direction of the restriction groove portion 646 on the front side), and only the rear edge portion projects toward the restriction groove portion 646. In the non-operating state, the first projecting portion 666 moves to the front side with respect to the guide portion 61 more than in the operating state, so that the entire first projecting portion 666 overlaps the projecting plate portion 647 of the second plate portion 612 of the guide portion 61 in the width direction, It does not project to the restriction groove portion 646 side.

  The second protruding portion 667 of the side plate portion 662 is located on the rear side of the restriction groove portion 646. In the non-operating state, the second projecting portion 667 and the rear plate portion 648 of the second plate portion 612 of the guide portion 61 (the portion of the second plate portion 612 on the rear side of the second inclined groove portion 644) are arranged in the width direction. It is placed in the overlapping position. In the non-operating state, the second projecting portion 667 moves to the front side with respect to the guide portion 61 compared to the operating state, so that the rear side portion thereof is in the width direction with the rear plate portion 648 of the second plate portion 612 of the guide portion 61. They overlap each other, and the front portion projects toward the regulation groove 646 side.

  The side plate portion 662 of the front-rear extension portion 66 moves to the front side with respect to the guide portion 61 when in the operating state. Then, the first projecting portion 666 is arranged above the second linear groove portion 643 at a position that does not overlap the restriction groove portion 646 in the width direction. The second protruding portion 667 is arranged at a position where the front side portion thereof overlaps with the restriction groove portion 646 in the width direction.

As shown in FIGS. 3 and 4, the rotating portion 6 has a frame portion 63 that accommodates the guide portion 61, the operating portion 62, and the link portion 7.
The frame portion 63 is formed in a four-sided frame shape and has a front frame portion 631 arranged on the front side and extending in the width direction, a rear frame portion 632 arranged on the rear side and extending in the width direction, and both widthwise ends of the front frame portion 631. And a pair of lateral frame portions 633 that extend in the front-rear direction and connect the both ends of the rear frame portion 632 in the width direction.

The front frame portion 631 has a front frame groove portion 631a extending in the width direction and opening upward. The rear frame portion 632 is formed with a rear frame groove portion 632a extending in the width direction and opening upward. Horizontal frame groove portions (housing portions) 633a extending in the front-rear direction and penetrating in the vertical direction are formed in the pair of horizontal frame portions 633.
Both widthwise end portions of the front frame groove portion 631a are continuous with the front end portions of the horizontal frame groove portions 633a, respectively, and the inside of the front frame groove portion 631a and the inside of the pair of horizontal frame groove portions 633a communicate with each other.

The connecting portion 67 of the operating portion 62 is arranged inside the front frame groove portion 631a, and the guide portion 61 and the front-rear extending portion 66 of the operating portion 62 are arranged inside the horizontal frame portion 633.
The frame portion 63 has a pair of horizontal frame portions 633 fixed to the guide portion 61. The frame portion 63 supports the operation portion 62 so as to be movable in the front-rear direction.
The pair of horizontal frame portions 633 are each connected to the first shaft portion 53. Thereby, the top plate 3 and the rotating portion 6 are configured to be rotatable around the axis 531 of the first shaft portion 53.

The guide portion 61 is arranged inside the pair of horizontal frame groove portions 633a. Further, when the top plate 3 is in the first posture, the guide portion 61 and the upper portions of the link portion 7 and the side wall portion 52 of the support portion 5 are also inserted into the pair of horizontal frame groove portions 633a. When the top plate 3 is in the first posture, the contact surface (upper end surface) 522 of the side wall portion 52 is in contact with the lower surface of the first plate portion 611 of the guide portion 61 inside the pair of horizontal frame groove portions 633a.
Since the first plate portion 611 of the guide portion 61 is in contact with the lower surface of the top plate body 31, when the top plate 3 is in the first posture, the contact surface (upper end surface) 522 of the side wall portion 52 has a pair of surfaces. Inside the horizontal frame groove portion 633 a, it is in contact with the top plate body 31 via the first plate portion 611 of the guide portion 61.

As shown in FIGS. 8 to 11, the link portion 7 includes a link plate portion 71 formed in a long flat plate shape, and a first pin provided at one end in the length direction of the link plate portion 71. 72 (one end) and the second pin 73 (other end) provided at the other end of the link plate portion 71 in the length direction.
Two link parts 7 are provided at intervals in the width direction.

In the link portion 7 arranged on one side in the width direction, the link plate portion 71 is below the first plate portion 611 of the guide portion 61 on the one side in the width direction, and the second plate portion 612 of the guide portion 61 and the operation are performed. The second pin 73 is disposed on one side in the width direction of the side plate portion 662 of the portion 62, the second pin 73 projects to the other side in the width direction, is inserted into the guide groove portion 645 of the guide portion 61, and is below the side plate portion 662 of the operation portion 62. It is located on the side.
In the link portion 7 arranged on the other side in the width direction, the link plate portion 71 is below the first plate portion 611 of the guide portion 61 on the other side in the width direction, and the second plate portion 612 of the guide portion 61 and the operation portion. The second pin 73 is disposed on the other side in the width direction of the side plate portion 662 of the portion 62, the second pin 73 projects to one side in the width direction, is inserted into the guide groove portion 645 of the guide portion 61, and is below the side plate portion 662 of the operation portion 62. It is located on the side.

  The first pin 72 is coaxially connected to the second shaft portion 54. Thereby, the link portion 7 is configured to be rotatable around the axis 541 of the second shaft portion 54. The second pin 73 moves in the extending direction along the groove 64 of the guide 61 by rotating the link 7 around the axis 541 of the second shaft 54.

In the first posture shown in FIGS. 1 and 3, the top plate 3 is in a recumbent state, and the guide portion 61 is arranged in a direction extending in the front-rear direction. As described above, in the first posture, the guide portion 61 is arranged at a position adjacent to the second shaft portion 54 in the width direction on the front side of the first shaft portion 53.
The front side of the extending direction when the top plate 3 is in the first posture is one side of the extending direction, and the rear side of the extending direction when the top plate 3 is in the first posture is the other side of the extending direction. To the side. At this time, as shown in FIGS. 8 and 9, the link portion 7 is in a horizontal posture such that the second pin 73 is on the front side of the first pin 72, and the first pin 72 is attached to the second shaft portion 54. The second pin 73 is supported and arranged at the front end portion of the first linear groove portion 641 near the end portion on one side in the extending direction of the groove portion 64 of the guide portion 61.
In the first posture, the operation portion 62 is biased to the rear side, the second lock portion 69 is inserted into the cutout portion 521 of the support portion 5 from the front side, and the second lock portion 69 is disposed on the downward surface 521a of the side wall portion 52 below. There is. As a result, when the rotating portion 6 (top plate 3) tries to rotate with respect to the supporting portion 5 such that the front side of the first shaft portion 53 is directed upward, the second lock portion 69 causes the side wall portion 52 to move. The top plate 3 contacts the downward surface 521a, the rotation of the top plate 3 is restricted, and the top plate 3 is maintained in the first posture.

  In the second posture shown in FIGS. 2 and 4, the top plate 3 is in an upright state, the guide portion 61 extends in the vertical direction, and the guide groove portion 645 is arranged so as to be above the regulation groove portion 646 (second inclined groove portion 644). To be done. At this time, as shown in FIGS. 10 and 11, the link portion 7 is in an oblique posture so that the second pin 73 is located above and behind the first pin 72, and the first pin 72 is placed in the second shaft portion. The second pin 73 is supported by 54 and is disposed in the restriction groove portion 646 located at the lower end portion of the groove portion 64 of the guide portion 61.

In the second posture, the front-rear extension portion 66 of the operation portion 62 extends in the vertical direction, and the connecting portion 67 is arranged above the front-rear extension portion 66.
In the second posture, the operating portion 62 is biased downward, and the first projecting portion 666 of the operating portion 62 biases the second pin 73 downward. At this time, the curved edge portion 684 of the first protruding portion 666 is in contact with the side surface of the second pin 73. As a result, the second pin 73 cannot be pulled out from the restriction groove portion 646, and the top plate 3 is fixed in the second posture.

To move the top plate 3 from the first posture to the second posture, the operation portion 62 is moved to the front side, the second lock portion 69 is moved to the front side of the notch portion 521, and the top plate 3 is rotatable. And The top plate 3 is rotated so that the front end of the top plate 3 is lifted upward. When the second lock portion 69 is disengaged from the cutout portion 521 and moved to the upper side of the side wall portion 52 of the support portion 5 by the rotation of the top plate 3, the operation of the operation portion 62 is released.
Then, the top plate 3 is rotated upward.
The link portion 7 rotates about the second shaft portion 54 as the rotating portion 6 rotates, and the second pin 73 moves the groove portion 64 of the guide portion 61 from one side to the other side in the extending direction. Move towards.
First, when the top plate 3 rotates from the first posture to the second posture, as shown in FIGS. 12 and 13, the second pin 73 of the link portion 7 extends in the extending direction along the first linear groove portion 641. Move to the other side of.
When the top plate 3 further rotates, as shown in FIGS. 14 and 15, the second pin 73 of the link portion 7 further moves to the other side in the extending direction, and the first straight groove portion 641 to the first inclined groove portion 642. It will be in the state which entered into the 2nd straight line groove part 643 through.

When the top plate 3 further rotates to the second posture, as shown in FIGS. 10 and 11, the second pin 73 of the link portion 7 further moves to the other side in the extending direction, and the second linear groove portion 643. Enters the restriction groove portion 646. At this time, the restriction groove portion 646 overlaps the lower edge portion of the first protruding portion 666 of the side plate portion 662 of the operation portion 62 in the width direction. Therefore, the second pin 73 comes into contact with the lower edge portion of the first protruding portion 666 and moves into the restriction groove portion 646 so as to move the first protruding portion 666 (operation portion 62) upward.
At this time, the guide portion 61 has a posture extending in the vertical direction, and the extending direction of the groove portion 64 is also the vertical direction. In the groove portion 64, the second inclined groove portion 644 is located at the lower end portion. When the second pin 73 enters the restriction groove portion 646, the operation portion 62 is urged downward, so that the first protrusion 666 of the operation portion 62 presses the second pin 73 that has entered the restriction groove portion 646 downward. It will be. This stops the movement of the second pin 73 of the link portion 7 in the extending direction. As a result, the movement of the link portion 7 is restricted and the top plate 3 is maintained in the second posture.

  To move the top plate 3 from the second posture to the first posture, the operation portion 62 is moved to the upper side, and the restraint of the second pin 73 by the first protruding portion 666 is released. Further, by moving the operating portion 62 upward, the second inclined edge portion 685 of the second projecting portion 667 abuts the second pin 73 from the lower side, and the second pin 73 is moved upward and forward with respect to the guide portion. I try to move it. As a result, the second pin 73 enters the guide groove portion 645 from the restriction groove portion 646, and the guide groove portion 645 becomes movable. When the second pin 73 becomes movable in the guide groove portion 645, the operation of the operation portion 62 is released.

Then, the top plate 3 is rotated downward.
The link portion 7 rotates about the second shaft portion 54 as the rotating portion 6 rotates, and the second pin 73 moves from the other side of the guide groove portion 645 toward the one side in the extending direction. To do. The second pin 73 moves to the vicinity of the front end portion 645a of the guide groove portion 645 in the order of the second linear groove portion 643 of the guide groove portion 645, the first inclined groove portion 642, and the first linear groove portion 641 as the top plate 3 moves toward the first posture. To do.
When the top plate 3 is in the first posture, the second lock portion 69 of the operation portion 62 contacts the front end surface of the side wall portion 52 of the support portion 5, but the front end surface of the side wall portion 52 is lowered from the rear side to the front side. Since the second lock portion 69 is formed in a taper surface directed to the side, the tip end portion of the second lock portion 69 moves along the front end surface of the side wall portion 52, and enters the cutout portion 521 when positioned on the lower side of the side wall portion 52. Becomes
As a result, the rotation of the rotating portion is restricted, and the top plate 3 is maintained in the first posture.

Next, the operation and effect of the furniture 1 according to the first embodiment described above will be described with reference to the drawings.
In the furniture 1 according to the first embodiment described above, since the guide portion 61 is provided on the top plate 3, the extension direction changes as the top plate 3 rotates, and the extension direction does not always become the vertical direction. As a result, the moving speed of the second pin 73 of the link portion 7 in the extending direction becomes slower than in the case where the extending direction of the guide portion 61 is always the vertical direction. The top plate 3 is supported by the leg portion 2 in a stable state at all times without sudden rotation. Further, since the top plate 3 is always supported by the legs 2 in a stable state, the top plate 3 can be easily rotated.
Further, since the first shaft portion that supports the rotating body and the second shaft portion that supports the rotating body via the link portion 7 are both provided in parallel to the leg portion 2, the rotating body in the leg portion 2 is The supporting positions are always the same two points (the first shaft portion 53 and the second shaft portion 54), and the top plate 3 is supported by the legs 2 in a stable state. The triangle formed by the three points of the first shaft portion 53, the second shaft portion 54, and the second pin 73 of the link portion 7 is always the same as the position of the two points (the first shaft portion 53, the second shaft portion 54). Become.

Further, since the rotating mechanism 4 is configured such that the first shaft portion 53, the second shaft portion 54, and the link portion 7 always connect the supporting portion 5 and the rotating portion 6, the supporting portion 5 and the rotating portion 6 and the rotation mechanism 4 provided with a member that switches between connection and separation depending on whether the top plate 3 is in the first posture or the second posture. be able to.
Further, the guide portion 61 is installed so that the extending direction thereof is, for example, a direction along the surface of the top plate 3, so that the guide portion 61 projects from the surface of the top plate 3. The furniture can be downsized as compared with the case.

  In addition, the leg portion 2 (support portion 5) has the contact surface 522 that comes into contact with the top plate 3 in the first posture from below via the first plate portion 611 of the guide portion 61, and thus the first portion The top plate 3 in the posture can be supported from below. Therefore, when the top plate 3 is in the first posture, the load of the top plate 3 acting on the rotating mechanism 4 can be reduced.

  Further, the furniture 1 locks the second pin 73 of the link portion 7 and restricts the movement of the second pin 73 in the extending direction with respect to the guide portion 61 when the top plate 3 is in the second posture. The top plate 3 can be maintained in the second posture by having the first projecting portion 666 (first locking portion, regulation locking portion).

  Further, the first projecting portion 666 attaches the second pin 73 of the link portion 7 located in the restriction groove portion 646 (the second end of the guide portion 61) to the lower side when the top plate 3 is in the second posture. The movement of the second pin 73 of the link portion 7 toward the guide groove portion 645 side (the first end side of the guide portion 61) is restricted. With such a configuration, the movement of the second pin 73 of the link portion 7 can be reliably regulated, and the top plate 3 can be maintained in the second posture.

  Further, the first projecting portion 666 is configured to be switchable between locking and releasing of the second pin 73 of the link portion 7 by being displaced in the extending direction. With such a configuration, the displacement direction of the first protruding portion 666 can be set to the direction in which the guide portion 61 extends, and thus when the first protruding portion 666 is displaced in the direction intersecting the guide portion 61. Compared with, the installation space of the first protrusion 666 and the member provided with the first protrusion 666 can be reduced.

  Further, the guide portion 61 is formed along the extending direction, and the guide groove portion 645 that is movable by inserting the second pin 73 of the link portion 7 and the guide groove portion 645 project from the guide groove portion 645 in a direction intersecting the extending direction. The second pin 73 of the link portion 7 is inserted when the top plate 3 is in the second posture, and has the regulating groove portion 646 that regulates the movement of the second pin 73 of the link portion 7 in the extending direction. .. With such a configuration, by moving the second pin 73 of the link portion 7 along the guide groove portion 645, the second pin 73 of the link portion 7 can be moved in the extending direction. By inserting the second pin 73 of No. 7 in the regulation groove portion 646, the movement of the second pin 73 of the link portion 7 in the extending direction can be regulated. In this way, the movement of the second pin 73 of the link portion 7 in the extending direction and the switching of the regulation can be easily performed with a simple structure.

  Further, the frame portion 63 of the rotating portion 6 (top plate 3) is formed with a horizontal frame groove portion 633a that accommodates the link portion 7 and the guide portion 61 in the first posture. As a result, the link portion 7 and the guide portion 61 are not exposed when the top plate 3 is in the first posture, and thus it is possible to prevent a person or an object from coming into contact with the link portion 7 and the guide portion 61.

  Further, when the rotating portion 6 (top plate 3) is in the first posture, it is configured to be insertable into the cutout portion 521 of the side wall portion 52 of the support portion 5, and when inserted into the cutout portion 521, the top plate 3 is formed. It has the 2nd lock part 69 which regulates rotation of. Thereby, the top plate 3 can be maintained in the first posture.

(Second embodiment)
Next, a second embodiment will be described with reference to the accompanying drawings, but the same or similar members and portions as those of the above-described first embodiment will be denoted by the same reference numerals and description thereof will be omitted, and the second embodiment will be described. The different configuration will be described.
As shown in FIGS. 16 and 17, the furniture 1B according to the second embodiment is different from the furniture 1 according to the first embodiment in the top plate, the rotation mechanism, the support portion, and the rotation portion.

A power source outlet 33 into which a plug of an electronic device used on the top plate body 31 can be inserted is attached to the top plate body 31 of the top plate 3.
The power outlet 33 has an outlet portion 34 embedded in the top plate body 31, and a wiring 35 connected to the outlet portion 34 and supplying power to the outlet portion 34. The wiring is led out to the lower side of the top plate body 31.

  As shown in FIGS. 16 to 19, the rotating mechanism 4B is provided in the rotating portion 6B and the link portion 7B provided between the supporting portion 5B and the rotating portion 6B to follow the rotation of the top plate 3. And a guide portion (groove portion 64, see FIG. 26) for movably supporting the link portion 7B in the front-rear direction.

As shown in FIGS. 18 and 19, the support portion 5B is provided on the bottom plate portion 51B fixed to the upper end portion of the pedestal portion 22 and on both sides in the width direction of the bottom plate portion 51B, and projects upward from the bottom plate portion 51B. It has a pair of side wall parts 52B.
The bottom plate portion 51B is longer in the width direction than in the front-rear direction and has a symmetrical shape in the width direction. The bottom plate portion 51B has a widthwise central portion fixed to the upper end portion of the pillar 22.

The bottom plate portion 51B is separated from the top plate body 31 in the first posture. The bottom plate portion 51B is provided with a first wiring holding portion 36 which holds the wiring 35 of the power outlet 33 attached to the top plate body 31. The first wiring holding portion 36 is a member that is attached to the upper portion of the bottom plate portion 51B and holds the wiring 35 in an inserted state, a hole portion that penetrates the bottom plate portion 51B and can be inserted with wiring. The first wiring holding portion 36 holds the wiring 35 movably. Thereby, the wiring 35 held by the first wiring holding portion 36 is configured to be movable following the rotation of the top plate 3.
The wiring 35 held by the first wiring holding portion 36 is extended to the floor along the pedestal portion 22. The pedestal portion 22 is provided with a second wiring holding portion 37 that holds the wiring 35 along the pedestal portion 22.

The wall surfaces of the pair of side wall portions 52B are oriented in the width direction and extend in the front-rear direction. The pair of side wall portions 52B have a shape symmetrical to each other in the width direction.
The upper end surface 522 of the side wall portion 52B is a flat horizontal surface. The upper end surface 522 of the side wall portion 52B is a contact surface that contacts the top plate 3 from below when the top plate 3 is in the first posture.
The rear end surface 523 of the side wall portion 52B projects rearward from the rear end portion of the bottom plate portion 51B. The front end surface 524 of the side wall portion 52B projects slightly forward of the front end portion of the bottom plate portion 51B. The front end surface 524 of the side wall portion 52B is an arcuate surface in which the middle portion in the height direction projects further forward than the upper and lower portions thereof.

As shown in FIG. 19, a cutout portion 521B that opens to the front side and the lower side is formed in the middle portion in the width direction on the lower side of the front end portion of the side wall portion 52B. The upper side of the cutout portion 521B in the front end face 524 of the side wall portion 52B is formed into an arc surface as described above, and no other cutout portion is formed. A portion of the front end surface 524 of the side wall portion 52B above the cutout portion 521B is referred to as a front arc surface 525.
Even if a recess such as a notch is formed on the upper side of the notch 521B in the front end face 524 of the side wall 52B, the recess is closed to form an arc surface.

The side wall portion 52B is provided with a first shaft portion 53 that rotatably supports the rotating portion 6B and a second shaft portion 54 that rotatably supports the link portion 7B.
The first shaft portion 53 is attached to a portion projecting rearward of the bottom plate portion 51B in the vicinity of the rear end portion of each of the pair of side wall portions 52B. The first shaft portion 53 is provided so as to penetrate the side wall portion 52B in a direction in which the axis 531 extends in the width direction. The first shaft portion 53 provided on each of the pair of side wall portions 52B is coaxial.

  The second shaft portion 54 is attached to the front side of each of the pair of side wall portions 52B on the front side with a gap from the first shaft portion 53. The second shaft portion 54 is provided so as to penetrate the side wall portion 52B in a direction in which the axis 541 extends in the width direction. The second shaft portion 54 provided on each of the pair of side wall portions 52B is coaxial. The first shaft portion 53 and the second shaft portion 54 are arranged such that their axes 531 and 541 are parallel to each other at the same height.

  As shown in FIG. 20, the rotating portion 6B is a long member and is fixed to the lower surface 31a of the top plate body 31 (see FIG. 16) in a direction extending in the front-rear direction. Two rotating portions 6B are provided at intervals in the width direction. The rotating portion 6B on one side in the width direction is supported by the side wall portion 52B on one side in the width direction, and the rotating portion 6B on the other side in the width direction is supported by the side wall portion 52B on the other side in the width direction. .. In addition, in FIG. 20, the cover portion 32B that covers the rotating portion 6B is omitted.

  The two rotating portions 6B are formed in a shape that is symmetrical in the width direction. Below, the rotating portion 6B arranged on one side in the width direction of the two rotating portions 6B will be described, and the description of the rotating portion 6B arranged on the other side in the width direction will be omitted. Further, the two cover portions 32B respectively covering the two rotating portions 6B and the two locking portions 8 arranged inside the two rotating portions 6B are also formed in a shape symmetrical in the width direction. There is. Below, the cover portion 32B and the locking portion 8 arranged on one side in the width direction of the two cover portions 32B and the two locking portions 8 will be described, and the cover portion arranged on the other side in the width direction. The description of 32B and the locking portion 8 is omitted.

As shown in FIGS. 21 and 22, the rotating portion 6B is formed so that the cross-sectional shape orthogonal to the length direction (front-back direction) is a U-shape (C-shape) that opens downward. ..
The rotating portion 6B includes a first rotating plate portion 61B extending in the front-rear direction and fixed to the top plate body 31, and a first rotating plate portion 61B extending downward from an edge portion on the other side in the width direction of the first rotating plate portion 61B. It has a two-rotation plate portion 62B and a third rotation plate portion 63B extending downward from an edge portion on one side in the width direction of the first rotation plate portion 61B.
An empty portion 615 surrounded by the first rotating plate portion 61B, the second rotating plate portion 62B and the third rotating plate portion 63B is formed in the rotating portion 6B.
The first rotating plate portion 61B is configured to be fixed to the top plate body 31 with a fixture such as a screw, for example.

  The second rotating plate portion 62B and the third rotating plate portion 63B are engaged with the first hole portions 621B and 631B through which the first shaft portion 53 is inserted and the second shaft portion 54 when the first posture is achieved. The first notch portions 622B and 632B that are separated from each other in the second posture are formed in an intermediate portion in the front-rear direction. The first cutout portion is U-shaped, and opens downward in the first posture, and opens frontward in the second posture. The first cutout portions 622B and 632B are arranged on the front side of the first hole portions 621B and 631B.

The second rotating plate portion 62B and the third rotating plate portion 63B have second cutout portions 623B and 633B into which the upper end portion (front end portion) of the connecting portion 71B of the link portion 7B is inserted when in the second posture. Has been formed. The second notches 623B and 633B are V-shaped and open downward when in the first posture, and open forward when in the second posture. The second cutouts 623B and 633B are arranged on the front side of the first cutouts 622B and 632B.
Second hole portions 624B and 634B, through which the operating rod 94 of the operating means 9 is inserted, are formed in the second rotating plate portion 62B and the third rotating plate portion 63B in the vicinity of the front end portion.

As shown in FIG. 20, when the rotating portion 6B is in the first posture, the first rotating plate portion 61B is arranged on the side wall portion 52B, and the second rotating plate portion 62B is arranged in the width direction of the side wall portion 52B. The third rotating plate portion 63B is arranged along the surface on the one side in the width direction of the side wall portion 52B. That is, in the first posture, substantially the entire side wall portion 52 is inserted inside the rotating portion 6B. At this time, the second shaft portion 54 is inserted into the first cutout portions 622B and 632B of the second rotating plate portion 62B and the third rotating plate portion 63B.
When the rotating portion 6B is in the second posture, the first rotating plate portion 61B is disposed after the side wall portion 52B, and the second rotating plate portion 62B is the surface on the other side in the width direction of the rear side portion of the side wall portion 52B. And the third rotating plate portion 63B is arranged along the one side surface in the width direction of the rear portion of the side wall portion 52B. That is, in the second posture, the rear portion of the side wall portion 52 is inserted inside the rotating portion 6B. At this time, the rotating portion 6B is separated from the second shaft portion 54.

As shown in FIG. 22, a groove portion 64B is formed in the second rotating plate portion 62B in front of the first cutout portion 622 in the width direction and extends substantially in the front-rear direction (extension direction). The groove 64B is continuously provided on the rear side of the second hole 624. The groove width of the groove portion 64B is set to be slightly smaller than the diameter of the second hole portion 624. The groove portion 64B is a guide portion into which the second pin 73 of the link portion 7B is inserted and which guides the second pin 73.
The groove portion 64B is a guide groove portion 641B extending linearly in a direction from the front side toward the rear side gently downward, and a groove portion 641B protruding from the rear end portion of the guide groove portion 641B toward the rear side in an obliquely upward direction. And a restriction groove portion 642B. The guide groove portion 641B and the regulation groove portion 642B are formed to have substantially the same groove width.

The extending direction of the guide groove portion 641B is substantially the front-back direction in the first posture, and the substantially vertical direction in the second posture. The direction in which the guide groove portion 641B extends changes from the substantially front-back direction of the first posture to the substantially vertical direction of the second posture or the substantially vertical direction of the second posture as the top plate 3 rotates. To do. The extending direction of the guide groove portion 641B is substantially along the lower surface 31a of the top plate body 31.
The guide groove portion 641B is configured so that the second pin 73 moves when the top plate 3 rotates. The restriction groove portion 642B is configured to restrain the movement of the second pin 73 with respect to the rotating portion 6B when the second pin 73 is inserted.

(Cover part)
As shown in FIGS. 18 and 19, the cover part 32B includes a pair of cover side plate parts 321 that cover both sides in the width direction of the rotating part 6B, a cover lower plate part 322 that covers the lower side of the rotating part 6B, and a cover. It has a cover front plate part 323 that covers the front side of the moving part 6B and a cover rear plate part 324 that covers the rear side of the rotating part 6B. The cover portion 32B is fixed to the top plate body 31 or the rotating portion 6B.
The connecting portion 71B of the link portion 7B is arranged between the cover side plate portion 321 and the rotating portion 6B.
The cover side plate portion 321 is formed with a cutout portion 321a that opens upward near the front end portion. The cutout portion 321a is arranged at a position overlapping the second hole portions 624B and 634B formed in the second rotating plate portion 62B and the third rotating plate portion 63B of the rotating portion 6B in the width direction. The operation rod 94 of the operation means 9 is inserted into the cutout portion 321a.

As shown in FIG. 23, the cover lower plate portion 322 has a cover lower opening portion 325 into which the side wall portion 52B (see FIGS. 18 and 19) of the leg portion 2 is inserted in the middle portion in the front-back direction in the vertical direction. Are formed. The cover lower opening portion 325 is configured so that the side wall portion 52 inserted into the inside of the rotating portion 6B penetrates.
A first cover lower plate portion 326 is formed in the cover lower plate portion 322 adjacent to the front side of the cover lower opening portion 325, and a first cover lower plate portion 326 is continuous with the cover front plate portion 323 in front of the first cover lower plate portion 326. The second cover lower plate portion 327 is formed. Both sides in the width direction of the second cover lower plate portion 327 are continuous with the pair of cover side plate portions 321.
As shown in FIGS. 23 and 24, the first cover lower plate portion 326 is not continuous with the pair of cover side plate portions 32, and a gap 328 is formed between each of the pair of cover side plate portions 321. Only the front edge of the first cover lower plate portion 326 is connected to the second cover lower plate portion 327, the side edge portion is separated from the pair of cover side plate portions 321, and the rear edge portion faces the cover lower opening portion 325. ing. The cover portion 32B is elastically deformable. The first cover lower plate portion 326 can be bent so as to rotate in the vertical direction about the front edge portion as an axis. The first cover lower plate portion 326 is arranged at a position where it does not interfere with the side wall portion 52B of the leg portion 2.

  The cover portion 32 is attached to the rotating portion 6B and is configured to rotate around the first shaft portion 53 together with the rotating portion 6B. When the cover part 32 is in the first posture, the entire cover lower opening 325 is closed by the side wall part 52 inserted into the rotating part 6B. When the cover part 32 is in the second position, the rear part of the cover lower opening 325 (the lower part side in the second position) is closed by the rear part of the side wall part 52 inserted into the rotating part 6B. In the second posture, the front side of the cover lower opening 325 (the upper side in the second posture) is not covered by the side wall portion 52.

(Link part)
As shown in FIGS. 20 and 25, the link portion 7B has a long connecting portion 71B having a U-shaped (C-shaped) cross-sectional shape that opens upward, and the length direction of the connecting portion 71B. It has the 1st pin 72 (one end) provided in one end part, and the 2nd pin 73 (the other end) provided in the other end part of the length direction of the connection part 71B.
Two link portions 7B are provided at intervals in the width direction. The two link portions 7B are formed in a shape that is symmetrical in the width direction. In the following, the link portion 7B arranged on one side in the width direction of the two link portions 7B will be described, and the description of the link portion 7B arranged on the other side in the width direction will be omitted.

The connecting portion 71B has a first connecting plate portion 711 extending in the front-rear direction and a plate surface facing the up-down direction, and a second connecting plate portion 712 extending upward from the other edge portion in the width direction of the first connecting plate portion 711. And a third connection plate portion 713 extending upward from an edge portion on one side in the width direction of the first connection plate portion 711.
The plate surface of the first connection plate portion 711 is formed in a substantially rectangular shape.
The second connection plate portion 712 is formed to be longer in the front-rear direction than the first connection plate portion 711, the front edge portion is located on the front side of the front edge portion of the first connection plate portion 711, and the rear edge portion is the first. The connecting plate 711 projects rearward from the rear edge of the connecting plate 711.
The third connection plate portion 713 is formed to be longer in the front-rear direction than the first connection plate portion 711, the front edge portion is at substantially the same position as the front edge portion of the first connection plate portion 711, and the rear edge portion is the first connection portion. The plate portion 711 projects rearward from the rear edge portion. The upper portion of the third connection plate portion 713 near the front end portion is cut out.

The first pin 72 is provided so as to penetrate near the rear edge of the second connecting plate portion 712 and the third connecting plate portion 713. The first pin 72 is located rearward of the rear edge portion of the first connection plate portion 711.
The second pin 73 is provided near the front edge of the second connection plate portion 712. The second pin 73 projects from the second connection plate portion 712 in one of the width directions.

  As shown in FIG. 20, in the link portion 7B, the second connecting plate portion 712 is arranged on the other side in the width direction of the second rotating plate portion 62B of the rotating portion 6B, and the third connecting plate portion 713 is the third. The first connecting plate portion 711 is disposed on one side in the width direction of the rotating plate portion 63B, the first connecting plate portion 711 faces the lower surface of the first rotating plate portion 61B, and the second rotating plate portion 62B and the third rotating plate portion 63B are provided. It is located on the lower side. In the first posture, the connecting portion 71B is in a state of covering the rotating portion 6B from below.

In the link portion 7B arranged on one side in the width direction, the second pin 73 projects to one side in the width direction and is inserted into the groove portion 64B of the rotating portion 6B from the other side in the width direction.
In the link portion 7B arranged on the other side in the width direction, the second pin 73 projects to the other side in the width direction and is inserted into the groove portion 64B of the rotating portion 6B from the one side in the width direction.

The first pin 72 constitutes the second shaft portion 54. Accordingly, the link portion 7B is configured to be rotatable around the axis line 541 of the second shaft portion 54 (first pin). Since the second shaft portion 54 is not coaxial with the first shaft portion 53, the link portion 7B and the top plate 3 rotate differently.
The link portion 7B is configured such that the second pin 73 moves in the extending direction along the guide groove portion 641B of the groove portion 64B by rotating around the axis line 541 of the second shaft portion 54.

  As shown in FIG. 26, in the first posture, the connecting portion 71B extends in the front-rear direction, and the first connecting plate portion 711 of the connecting portion 71B overlaps the lower side of the first cover lower plate portion 326 of the cover portion. It is arranged. The front end portion 711a of the first connection plate portion 711 is arranged at the connection portion between the first cover lower plate portion 326 and the second cover lower plate portion 327.

The second connection plate part 712 and the third connection plate part 713 are inserted between the rotating part 6B and the cover part 32B through the gap 328 between the first cover lower plate part 326 and the cover side plate part 321 of the cover part 32B. ing.
At this time, the second pin 73 is arranged at a position slightly rearward of the front end portion of the guide groove portion 641B. The position where the second pin 73 is arranged in the guide groove portion 641B is referred to as a first attitude second pin position 643B.

  When the top plate 3 rotates from the first posture to the second posture, the second pin 73 locked in the guide groove portion 641B also moves together with the top plate 3, so that the link portion 7B is centered on the first pin 72. Rotate as. Since the first shaft portion 53 of the top plate 3 and the second shaft portion 54 of the link portion 7B are arranged at different positions, the second pin 73 rotates around the second shaft portion 54. The guide groove portion 641B is moved toward the rear side (regulating groove portion 642B side).

  At this time, the connecting portion 71B of the link portion 7B also moves rearward with respect to the rotating portion 6B and the cover portion 32B, so that the first connecting plate portion 711 and the first cover lower plate portion 326 of the connecting portion 71B mutually move. Separate. A front end portion (an end portion on the side where the second pin 73 is provided) of the first connection plate portion 711 in the first posture moves along the first cover lower plate portion 326.

As shown in FIG. 27, when the top plate 3 is in the second posture, the second pin 73 that has moved from the first posture second pin position 643B (see FIG. 26) to the rear side (the regulation groove portion 642B side) has the regulation groove portion. It moves to 642B and is inserted in the regulation groove part 642B.
In the second posture, the link portion 7B is in an oblique posture in which the front end portion is above and behind the rear end portion. The first connection plate portion 711 is adjacent to the lower side of the first cover lower plate portion 326 and covers the upper side (front side in the first posture) of the cover lower opening 325. The upper end portion 711a (the front end portion in the first posture) of the first connection plate portion 711 is in the second cutout portions 623B and 633B of the second rotating plate portion 62B and the third rotating plate portion 63B. The second connecting plate portion 712 and the third connecting plate portion 713 are overlapped with the rotating portion 6B in the width direction only at the front portion, and are sandwiched between the cover portion 32B and the rotating portion 6B.

As shown in FIGS. 26 to 28, the locking portion 8 is arranged in the empty portion 615 of the rotating portion 6B and is fixed to the rotating portion 6B, and the locking portion 8 is arranged in the empty portion 615 of the rotating portion 6B. And a movable portion 82 movably supported with respect to the fixed portion 81.
The fixed portion 81 and the movable portion 82 are arranged on the front side of the first cutout portions 622B and 632B in the empty portion 615 of the rotating portion 6B.

  The movable portion 82 includes a movement inducing portion 83 (see FIGS. 26 and 27) for moving the second pin 73 (see FIG. 27) of the link portion 7B from the regulation groove portion 642B to the guide groove portion 641B in the second posture, and A second pin pressing portion 84 (first locking portion, see FIG. 26, FIG. 27) that presses the second pin 73, which is attached to the movement inducing portion 83 in two postures and inserted in the regulating groove portion 642B, in the regulating groove portion 642B, and the movement inducing portion. An engaging member 85 (see FIG. 28) which is connected to the portion 83 and is engageable with the cutout portion 521B (see FIG. 28) formed in the side wall portion 52B of the support portion 5B in the first posture. .. The movable portion 82 is configured to be movable in the front-rear direction by operating the operation means 9 described later.

  Referring to FIGS. 26 to 30, the fixing portion 81 is a fixing plate that is arranged below and facing the first rotating plate portion 61B (see FIGS. 26 to 28) of the rotating portion 6B with a gap. The displacement direction of the portion 86, the movement inducing portion 83 of the movable portion 82 that is fixed to the upper portion of the fixed plate portion 86, the second pin pressing portion 84, and the second pin 73 (see FIGS. 26 to 28) of the link portion 7B is changed. It has a first restricting portion 87 that restricts and a second restricting portion 88 that is fixed to the upper part of the fixed plate portion 86 and restricts the displacement direction of the engaging member 85 of the movable portion 82. As shown in FIG. 30, a spring 819 is provided between the fixed portion 81 and the movable portion 82 to urge the movable portion 82 to the rear side.

The fixed plate portion 86 includes a first fixed plate portion 861 arranged parallel to the first rotary plate portion 61B of the rotary portion 6B, and a first fixed plate portion 861 extending downward from a rear edge portion of the first fixed plate portion 861. And 2 fixed plate portions 862. Both edge portions in the width direction of the first fixed plate portion 861 are joined to the lower side of the second rotary plate portion 62B and the third rotary plate portion 63B of the rotary portion 6B. In the present embodiment, the rotating part 6B and the fixed plate part 86 are made of metal, and the first fixed plate part 861, the second rotating plate part 62B and the third rotating plate part 63B are welded. ..
An opening 863 is formed in the first fixed plate portion 861 at the intermediate portion in the front-rear direction on the other side in the width direction.
The first regulating portion 87, the second regulating portion 88, and the movable portion 82 fixed to the upper portion of the fixed plate portion 86 include the fixed plate portion 86, the first rotating plate portion 61B, the second rotating plate portion 62B, and the third rotating plate portion 62B. It is surrounded by the rotating plate portion 63B.

As shown in FIGS. 31 and 32, the movement inducing portion 83 is slidably arranged above the first fixing plate portion 861. The movement inducing portion 83 is arranged on one side in the width direction of the second rotating plate portion 62B of the rotating portion 6B and is adjacent to the rear side of the groove portion 64 formed in the second rotating plate portion 62B in the width direction. ing. The rear side of the groove 64 indicates the rear side of the guide groove 641B and the restriction groove 642B.
The movement inducing portion 83 has a connecting portion 831 arranged on the front side to which the pulling member 93 of the operating means 9 is connected, and a main body portion 832 connected to the rear side on the other side in the width direction of the connecting portion 831. is doing.
The main body portion 832 is formed in a substantially J shape in which the shape viewed from the width direction is recumbent, and the lower main body portion 833 arranged along the first fixing plate portion 861 and the rear main body portion 833. It has a rear main body portion 834 extending upward from the side end portion and an upper main body portion 835 extending frontward from the upper end portion of the rear main body portion 834. The lower main body portion 833 is longer than the upper main body portion 835 in the front-rear direction, and the rear end portion of the lower main body portion 833 and the rear end portion of the upper main body portion 835 are vertically overlapped with each other. The front end of 833 is located in front of the front end of the upper body 835.

  The lower body portion 833 and the upper body portion 835 are vertically separated from each other. The main body portion 832 is surrounded by the upper surface of the rear side portion of the lower main body portion 833, the front surface of the rear main body portion 834, and the lower surface of the upper main body portion 835, and the displacement inducing groove portion 836 that penetrates in the width direction and opens to the front side. Are formed. The displacement inducing groove portion 836 is adjacent to the rear portion side of the groove portion 64 formed in the second rotating plate portion 62B in the width direction, and the second pin 73 locked to the rear portion side of the groove portion 64 is arranged in the width direction. It is configured to be inserted.

  The upper surface of the lower body 833 and the lower surface of the upper body 835 are formed in a substantially horizontal plane. The front surface of the rear side main body portion 834 is formed into a circular arc surface in which a lower side 834a gradually extends rearward from the lower side toward the upper side, and an upper side 834b gradually extends from the lower side to the upper side toward the front side. It is formed on the inclined surface facing. The inclined surface on the upper side 834b on the front surface of the rear body portion 834 is referred to as a second pin contact surface 834b.

  The lower main body portion 833 has a hole portion 833a penetrating in the up-down direction in a front side portion of the displacement inducing groove portion 836, and the second pin pressing portion 84 is rotatably arranged inside the hole portion 833a. ing. The rotating shaft portion 843 of the second pin pressing portion 84 extends in the width direction and is supported by the lower body portion 833. The lower body portion 833 has notch portions 833b formed on both sides in the width direction of the hole portion 833a, the notch portions 833b opening to the lower side where the projecting pins 842 (see FIG. 32) of the second pin pressing portion 84 are arranged. Has been done.

The second pin pressing portion 84 has a plate-shaped second pin pressing portion main body 841 and projecting pins 842 that project from the second pin pressing portion main body 841 to both sides in the width direction.
As shown in FIG. 26, the second pin pressing portion main body 841 is arranged such that the plate surface faces the width direction, the rotating shaft portion 843 is provided on the front side, and protrudes rearward from the rotating shaft portion 843. A pin 842 is provided so as to project.
As described above, the protruding pin 842 is arranged in the cutout portion 833b that opens to the lower side of the lower body portion 833. The protruding pin 842 is configured so that it cannot be displaced above the downward surface of the cutout portion 833b.
The projecting pin 842 is biased upward by a spring 845 (see FIGS. 26 and 27) provided in the lower body 833, and is pressed against the downward surface of the cutout 833b. As a result, the second pin pressing portion 84 does not rotate downward and is maintained in the state of being inserted into the hole portion 833a. In the second posture, the spring 845 urges the rear side.

As shown in FIG. 32, the plate surface of the second pin pressing portion main body 841 is formed into a substantially fan shape. The fan-shaped central angle of the plate surface of the second pin pressing portion main body 841 is an acute angle. .. The second pin pressing portion main body 841 is provided with a rotating shaft portion 843 in the vicinity of the first corner portion 846 corresponding to the central angle. The first corner portion 846 has an R shape.
The second pin pressing portion main body 841 is a lower edge portion 841a which is located on the lower side and extends substantially in the front-rear direction in a normal state in which the operating means 9 is not operated (a state in which the spring 845 is biased). And a lower rear edge portion 841b that curves and extends from the rear end portion of the lower edge portion 841a toward the upper side toward the rear side, and a gradual front side from the upper end portion of the lower rear edge portion 841b toward the upper side. An upper rear edge 841c extending in an oblique direction toward the front edge, an upper edge 841d extending from the upper end of the upper rear edge 841c toward the front, and an oblique direction gradually decreasing from the front end of the upper edge 841d toward the front. And a front edge portion 841e extending to the lower edge portion 841a and connected to the lower edge portion 841a. The upper rear edge portion 841c is formed in an arc surface centered on the rotation shaft portion 843.

The lower side of the second pin pressing portion main body 841 is arranged in the hole portion 833a, and the upper side thereof is arranged above the lower main body portion 833 and is arranged in the displacement inducing groove portion 836. The upper side of the second pin pressing portion main body 841 overlaps with the groove portion 64 formed in the second rotating plate portion 62B when viewed in the width direction.
The lower edge portion of the second pin pressing portion main body 841 is substantially horizontal and is arranged at the same height as the lower end portion of the lower main body portion 833. The upper edge portion of the second pin pressing portion main body 841 is arranged in the displacement inducing groove portion 836 in a direction that is a substantially horizontal plane, and faces the lower surface of the upper main body portion 835 with a gap.
The upper rear edge portion 841c of the second pin pressing portion main body 841 is arranged above the lower main body portion 833, and is arranged on the front side with a gap from the rear main body portion 834.

  When the second pin pressing portion 84 is pressed downward in the first posture, the spring 845 elastically deforms, the rear side of the rotating shaft portion 843 moves downward, and the lower side lower than the lower main body portion 833. It is disposed in the opening 861a of the first fixing plate portion 861 so as to project to the side. When the downward pressing of the second pin pressing portion 84 is released, the second pin pressing portion 84 is pressed upward by the restoring force of the spring 845 and returns to the normal position.

  As shown in FIG. 27, when the second pin pressing portion 84 is in the second posture, the second pin 73 inserted into the restriction groove portion 642B has an upper rear edge portion 841c (in the second posture, it becomes a rear upper edge portion). Is abutting from the front side. As described above, in the second posture, the second pin pressing portion 84 is biased to the rear side by the spring 845, so that the second pin 73 is pressed to the rear side and the second pin 73 moves to the front side. Are prevented from coming out of the regulation groove portion 642B and entering the guide groove portion 641B.

  As shown in FIGS. 28 and 31, the engagement member 85 is a rod-shaped member and is connected to the rear side of a portion on one side in the width direction of the connecting portion 831 of the movement inducing portion 83 in a direction extending in the front-rear direction. The engaging member 85 is adjacent to the main body portion 832 of the movement inducing portion 83 in the width direction. The rear end portion 85a of the engaging member 85 projects rearward from the rear end portion of the movement inducing portion 83. There is.

  The second restricting portion 88 is a block-shaped member that is a substantially rectangular parallelepiped, and has a notch portion 881 that extends in the front-rear direction and that opens inward in the width direction on the lower side. The second restricting portion 88 is arranged on the upper side of the engaging member 85 and on one side in the width direction so that the engaging member 85 is arranged in the cutout portion 881. The lower end of the second restricting portion 88 is fixed to the first fixing plate portion 861 and is configured to be movable relative to the engaging member 85. The engagement member 85 is configured to move in the front-rear direction along the cutout portion 881 and the upper surface 31b of the first fixing plate portion 861. The second restricting portion 88 guides the engagement member 85 so that it moves in the front-rear direction and does not move in the width direction or the vertical direction.

  As shown in FIGS. 30 and 33, the first restricting portion 87 includes a first side plate portion 871 provided on one side in the width direction of the movement inducing portion 83 (see FIG. 30) and a width direction of the movement inducing portion 83. A second side plate portion 872 provided on the other side, an upper plate portion 873 provided on the upper portion of the movement inducing portion 83, and an upper portion on one side in the width direction of the connecting portion 831 of the movement inducing portion 83 and one side in the width direction. And a connecting portion abutting portion 874 that is provided.

  The first side plate portion 871 is arranged between the movement inducing portion 83 and the second restricting portion 88 and the engaging member 85. The first side plate portion 871 and the second side plate portion 872 are arranged such that their front end portions vertically overlap with the openings 863 of the first fixing plate portion 861 and project downward to the front end portion to make the first fixing. Protrusions 871a and 872a arranged in the opening 863 of the plate portion 861 are formed, respectively.

Each of the protrusions 871a and 872a is formed in a tapered shape whose dimension in the front-rear direction decreases downward. In the projecting portions 871a and 872a, the front edge portions 871b and 872b on the front side extend in the vertical direction, and the rear edge portions 871c and 872c incline so as to gradually move downward from the rear side toward the front side. The lower end portions of the front edge portions 871b and 872b are connected to the lower end portions of the rear edge portions 871c and 872c.
Substantially V-shaped groove portions 871d and 872d opening downward at the lower side of the front portion are respectively formed on the other side surface of the first side plate portion 871 in the width direction and the one side surface of the second side plate portion 872 in the width direction. Has been formed. Of the side surfaces of the groove portions 871d and 872d, rear side surfaces 871e and 872e, which are the rear side, extend in the vertical direction, and front side surfaces 871f and 872f, which are the front side, extend gradually downward from the rear side to the front side.

  Front side surfaces 871f and 872f of the groove portions 871d and 872d are continuous with rear edge portions 871c and 872c of the protruding portions 871a and 872a. The front side surfaces 871f and 872f of the groove portions 871d and 872d and the rear edge portions 871c and 872c of the protruding portions 871a and 872a are configured so that the protruding pin 842 of the second pin pressing portion 84 moves. Front side surfaces 871f and 872f of the groove portions 871d and 872d and rear edge portions 871c and 872c of the protruding portions 871a and 872a are used as protruding pin guide surfaces 871g and 872g.

The second side plate portion 872 is arranged in parallel with the portion of the second rotating plate portion 62B of the rotating portion 6B shown in FIG. 22 where the rear side of the groove 64B is formed. As described above, the rear side of the groove 64 indicates the rear side of the guide groove 641B and the restriction groove 642B.
In the second side plate portion 872, a groove portion 875 having the same shape as the rear side of the groove portion 64B is arranged at a position overlapping the groove portion 64B in the width direction. The groove portion 875 of the second side plate portion 872 is open to the front side. The tip of the second pin 73 that moves on the rear side of the groove 64B of the second rotating plate 62B is inserted into the groove 875 of the second side plate 872.

As shown in FIG. 20, the operating means 9 includes an operating lever 91 (operating portion) arranged below the top plate body 31, and a movable portion 82 of the operating lever 91 and the locking portion 8 (see FIGS. 26 to 28). And a cooperation unit 92 that cooperates with (see).
As shown in FIGS. 11 to 13, the cooperation portion 92 is disposed inside the rotating portion 6B, and the pulling member 93 connected to the connecting portion 831 of the movable portion 82 and the operation rod connected to the operation lever 91. And a cam 95 attached to the operation rod 94 and connected to the pulling member 93.

The operation lever 91 is arranged with a space further on one side in the width direction than the rotating portion 6B on one side in the width direction.
As shown in FIGS. 34 and 35, a protective wall portion 96 is provided adjacent to the other side of the operation lever 91 in the width direction.
The protective wall portion 96 is a wall body whose wall faces the width direction and extends in the front-rear direction, and is attached to the lower side of the top plate body 31. A hole 961 penetrating in the width direction is formed in the protective wall 96, and the operation rod 94 is inserted into the hole 961.

  As shown in FIG. 18, the operation rod 94 is a round bar-shaped member and is installed in a direction extending in the width direction. The operation rod 94 penetrates the turning portion 6B and the cover portion 32B on one side in the width direction, and the other end portion in the width direction is inserted into the turning portion 6B and the cover portion 32B on the other side in the width direction. Has been done. The operation rod 94 is inserted into the turning portion 6B and the cover portion 32B from the cutout portion 321a formed in the cover portion 32B and the second hole portions 624B and 634B formed in the turning portion 6B.

One end of the operation rod 94 on the one side in the width direction projects to one side in the width direction from the rotating portion 6B on the one side in the width direction, penetrates the protective wall 96, and is connected to the operation lever 91. .. The operation lever 91 is configured to rotate the operation rod 94 around its axis when the user pushes it upward. The operation lever 91 is not directly fixed to the top plate body 31, but is arranged below the top plate body 31 by being connected to the operation rod 94.
As shown in FIGS. 34 and 35, the lower end surface 91a of the operation lever 91 is arranged at substantially the same height as the lower end surface 96a of the protective wall portion 96. Further, the front end portion 91b of the operation lever 91 is disposed in substantially the same position as the front end portion 96b of the protection wall portion 96 in the front-rear direction. The rear end portion 91c of the operation lever 91 is the rear end portion of the protection wall portion 96. It is arranged in front of 96c.

As shown in FIG. 28, the cam 95 is attached to the operation rod 94 inside each of the two rotating portions 6B. The cam 95 is a drop-shaped plate-shaped member whose plate surface is wider on one end side in the direction of the position along the plate surface than on the other end side, and is a wide portion 951 on one end side. The operation rod 94 penetrates through and the pulling member 93 is connected to the narrow portion 952 on the other end side.
The cam 95 and the operation rod 94 are fixed so that they do not rotate relative to each other. The wide portion 951 of the cam 95 is arranged on the front side of the narrow portion 952.
The pulling member 93 is a rod-shaped member, and is arranged inside each of the two rotating portions 6B in a direction extending in the front-rear direction. The rear end portion of the pulling member 93 is rotatably connected to the connecting portion 831 of the movable portion 82 about an axis extending in the width direction, and the front end portion is rotated about the axis extending in the width direction to the narrow portion 952 of the cam 95. It is movably connected.

When the operation lever 91 is operated and the operation rod 94 is rotated from the state where the operation lever 91 shown in FIG. 28 is not operated, the narrow portion 952 of the cam 95 moves downward and forward. The pulling member 93, which is rotated to move and is connected to the narrow portion 952 of the cam 95, is pulled forward and downward. Since the pulling member 93 is rotatably connected to the narrow portion 952 of the cam 95, even if the narrow portion 952 of the cam 95 rotates so as to move to the lower side and the front side, the rotation of the cam 95 is prevented. It does not rotate around the axis of motion, but moves forward when it is in a posture that extends in the front-rear direction. The pulling member 93 moves slightly downward by the rotation of the cam 95.
Then, the movable portion 82 moves to the front side by moving the pulling member 93 to the front side. The movable portion 82 moves to the front side along the fixed plate portion 86. In the second posture, when the operation lever 91 is operated, the movable portion 82 moves upward.

When the movable portion 82 moves to the front side, the engaging member 85 moves to the front side. When the engagement member 85 engaged with the cutout portion 521B of the side wall portion 52B in the first posture moves to the front side, the engagement member 85 comes out of the cutout portion 521B, so that the top plate 3 is rotatable. Becomes
It should be noted that when the movable portion 82 moves upward in the second posture, the engaging member 85 moves upward, but in the second posture, the engaging member 85 is not locked as in the first posture. There is no locking mechanism that is released by moving the coupling member 85.

When the movable portion 82 moves to the front side, the second pin pressing portion 84 moves to the front side. Since the second pin pressing portion 84 moves to the front side with respect to the first restricting portion 87 of the fixed portion 81, the projecting pin 842 moves along the projecting pin guide surfaces 871g and 872g of the first restricting portion 87, The rear side is configured to rotate downward. At this time, since the second pin pressing portion 84 is arranged in the opening of the fixed plate portion, it does not interfere with the fixed plate portion.
In the second posture, when the movable portion 82 moves upward, the second pin pressing portion 84 rotates forward. In the second posture, if the operation lever 91 is not operated, the second pin pressing portion 84 presses the second pin 73 so as to rotate toward the rear side, so that the operation lever 91 is operated. When the second pin pressing portion 84 rotates forward, the second pin pressing portion 84 separates from the second pin 73.

When the movable portion 82 moves to the front side, the movement inducing portion 83 moves to the front side.
In the second posture, when the operation lever 91 shown in FIG. 38 is not operated and the operation lever 91 shown in FIG. 39 is operated, the movement inducing portion 83 moves upward and the movement inducing portion 83 is restricted. The second pin 73 of the link portion 7B inserted in the groove portion 642B is abutted from the lower side. 38 to 40 are sectional views as seen from the side opposite to the width direction in FIG. 27.
At this time, as shown in FIG. 40, since the second pin 73 comes into contact with the second pin contact surface 834b of the movement inducing portion 83, the second pin contact surface 834b moves upward. , The second pin 73 is pushed upward and rearward, and tries to move upward and rearward. At this time, the second pin pressing portion 84 rotates forward and is separated from the second pin 73 and does not press the second pin 73, so the second pin 73 moves upward and rearward. It becomes possible and moves from the regulation groove portion 642B to the guide groove portion 641B. As a result, the top plate 3 is in a rotatable state.
When the movable portion 82 moves to the front side in the first posture, the movement inducing portion 83 moves to the front side, but the second pin 73 of the link portion 7B is arranged near the front end portion of the guide groove portion 641B. The movement inducing portion 83 does not push the second pin 73.

To move the top plate 3 from the first posture to the second posture, as shown in FIG. 36, the operation lever 91 is operated to move the movable portion 82 to the front side. As a result, the engaging member 85 comes out of the cutout portion 521B of the side wall portion 52B of the leg portion 2, and the top plate 3 becomes rotatable.
The top plate 3 is rotated so that the front end of the top plate 3 in the first posture is lifted upward. When the top plate 3 rotates, the engagement member 85 faces the front arc surface 525 of the side wall portion 52B. For this reason, when the operation lever 91 is released, the engaging member 85 tries to move to the rear side, but moves along the front arc surface 525, and thus is maintained in the state of moving to the front side. When the top plate 3 further rotates, the engaging member 85 separates from the front circular arc surface 525, and thus moves to the rear side (downward in the second posture) and is restored when the operation lever 91 is released.

When the top plate 3 rotates and the rotating portion 6B rotates, the link portion 7B rotates about the second shaft portion 54. The second pin 73 of the link portion 7 rotates about the second shaft portion 54, and the groove 64B of the second rotating plate portion 62B is moved rearward from the front side (first posture second pin position 643B, see FIG. 26). It moves toward the side (the side where the regulation groove portion 642B is formed).
First, when the top plate 3 rotates from the first posture to the second posture and the second pin 73 of the link portion 7B moves to the rear side (the side toward the regulation groove portion 642B) along the guide groove portion 641B, The second pin 73 contacts the second pin pressing portion 84. At this time, the second pin 73 comes into contact with the front edge portion 841e of the second pin pressing portion main body 841 from the front side and tries to move to the rear side along the guide groove portion 641B, whereby the second pin pressing portion main body 841 moves. The front edge 841e is pushed rearward. As a result, the second pin pressing portion 84 elastically deforms the spring 845 and rotates downward, and the protrusion to the guide groove portion 641B (the portion overlapping the guide groove portion 641B when viewed in the width direction) becomes smaller. As a result, the second pin 73 can move further rearward along the guide groove portion 641B while pressing the front edge portion 841e and the upper edge portion 841d of the second pin pressing portion main body 841.
At this time, the guide groove portion 641B is in a state of extending in a substantially vertical direction in which the front side in the first posture is above the rear side in the first posture. From here, the front side of the guide groove portion 641B in the first posture will be referred to as the upper side, and the rear side of the first posture will be described as the lower side.

As shown in FIG. 22, when the top plate 3 is rotated, the second pin 73 moves further downward and is located at the boundary between the guide groove portion 641B and the restriction groove portion 642B. The corner portion 841f between the upper edge portion 841d and the upper rear edge portion 841c of the pressing portion main body 841 abuts. At this time, the second pin pressing portion 84 tries to rotate around the rotating shaft portion 843 by the restoring force of the spring 845 so that the corner portion 841f between the upper edge portion 841d and the upper rear edge portion 841c faces the front side. To do. As a result, as shown in FIG. 23, the second pin 73 is pushed by the corner portion 841f of the second pin pressing portion 84 and inserted into the regulation groove portion 642B located on the front side.
When the second pin 73 is inserted into the restriction groove portion 642B, the second pin pressing portion 84 is disposed diagonally above the front side, and the corner portion 841f of the second pin pressing portion 84 is in contact with the second pin 73. It is structured so as not to get out. As a result, the second pin 73 of the link portion 7B is constrained to be locked in the restriction groove portion 642B, and the top plate 3 is maintained in the second posture.

When the second pin 73 is inserted into the restriction groove portion 642B, the axis of the rotation shaft portion 843 of the second pin pressing portion 84 and the corner portion 841f of the second pin pressing portion main body 841 that abuts the second pin 73. The axis of the second pin 73 is arranged on the straight line connecting the two. In addition, the straight line connecting the shaft center of the rotation shaft portion 843 of the second pin pressing portion 84 and the corner portion 841f of the second pin pressing portion main body 841 contacting the second pin 73 is such that the restriction groove portion 642B is the guide groove portion 641B. It almost coincides with the direction of projecting from.
As a result, when a moment in the direction of moving the second pin 73 from the restricting groove portion 642B to the guide groove portion 641B is generated by the external force that causes the top plate 3 in the second posture to move to the first posture, the second pin 73 causes the second pin 73 to move. Since the force acting on the second pin pressing portion 84 is in the direction toward the rotation shaft portion 843 of the second pin pressing portion 84, the second pin pressing portion 84 rotates and the second pin 73 moves. Is prevented.

  When in the second posture, the first connection plate portion 711 of the link portion 7B is adjacent to the lower side of the first cover lower plate portion 326, and the upper side of the cover lower opening 325 (the front side in the first posture) is positioned. Covering. The upper end portion (the front end portion in the first posture) of the first connecting plate portion 711 is in the second cutout portions 623B and 633B of the second rotating plate portion 62B and the third rotating plate portion 63B, and It is located rearward of the lower end of the cover lower plate portion 326.

To move the top plate 3 from the second posture to the first posture, as shown in FIG. 39, the operation lever 91 is moved upward and the movable portion 82 is moved upward. As a result, the movement inducing portion 83 and the second pin pressing portion 84 move upward.
By moving the second pin pressing portion 84 to the upper side, a portion (a portion overlapping with the guide groove portion 641B when viewed in the width direction) that is separated from the second pin 73 and rotates forward and protrudes to the guide groove portion 641B is small. Become.
When the movement inducing portion 83 moves upward, the second pin contact surface 834b comes into contact with the second pin 73 of the link portion 7B inserted into the restriction groove portion 642B from below and moves the second pin 73 upward. Let The second pin 73 pushed upward moves along the restriction groove 642B, and therefore moves the restriction groove 642B upward and frontward.

At this time, since the second pin pressing portion 84 is separated from the second pin 73 and does not press the second pin 73, the second pin 73 can move to the upper side and the front side, and is guided from the regulation groove portion 642B. Move to the groove 641B. As a result, the top plate 3 becomes rotatable.
At this time, the upper end portion (the end portion on the side where the second pin 73 is provided) of the link portion 7B moves to the upper side and the front side by the movement of the second pin 73, so the first connection plate portion 711 of the link portion 7B. Moves to the upper side and the front side, and the upper end thereof comes out from the second cutout portions 623B and 633B of the second rotating plate portion 62B and the third rotating plate portion 63B, and from the lower end portion of the first cover lower plate portion 326. Is also in the state of being located on the front side.

The top plate 3 is rotated so that its upper end moves forward and downward.
The link portion 7B rotates around the second shaft portion 54 by the rotation of the top plate 3 and the rotation portion 6B, and the second pin 73 moves the guide groove portion 641B downward (rear side). ) To the upper side (front side). At this time, the upper end portion of the first connection plate portion 711 of the link portion 7B is located on the front side of the lower end portion of the first cover lower plate portion 326. The first connection plate portion moves along the front surface (the lower surface in the first posture) of the first cover lower plate portion 326. When the top plate 3 is in the first posture, the first connection plate portion 711 of the link portion 7B is arranged so as to overlap with the lower side of the first cover lower plate portion 326, and the front end portion thereof is arranged in the first cover lower plate portion 326 and the first cover lower plate portion 326. 2 It is arranged below the connecting portion with the lower cover plate portion 327.
When the top plate 3 is in the first posture, the second pin 73 is arranged near the front end portion of the guide groove portion 641B.

When the top plate 3 changes from the second posture to the first posture, the engaging member 85 contacts the front arc surface 525 of the side wall portion 52B and rotates along the front arc surface 525. Since the engaging member 85 is biased to the rear side (lower side) and can move to the front side when pushed to the front side, it is pushed to the front arc surface 525 and moves to the front side. When in the first posture, the engaging member 85 separates from the front arc surface 525 and is arranged on the front side of the cutout portion 521B, so that the engagement member 85 moves to the rear side and is inserted into the cutout portion 521B.
As a result, the rotation of the top plate 3 is restricted, and the top plate 3 is maintained in the first posture.

The furniture 1B according to the second embodiment has the same effects as the furniture 1A according to the first embodiment.
Further, since the protective wall portion 96, which is separate from the rotating portion 6B, is provided on the lower surface 31a of the top plate main body 31 adjacent to the operation lever 91, other parts such as wagons and chairs are provided below the top plate 3. When the furniture of the user is moved or the user moves the limbs, the other furniture and the limbs of the user come into contact with the protective wall portion 96, so that the other furniture and the limbs of the user unintentionally move. It is possible to prevent the operation lever 91 from being operated by coming into contact with the operation lever 91.

  Further, since the wiring 35 of the power outlet 33 is held by the first wiring holding portion 36 provided on the support portion 5B and guided by the pedestal portion 22, the wiring 35 is moved downward from the upper end portion of the pedestal portion 22. It can be installed along the line. Therefore, the wiring 35 does not hang down from the top plate 3, and the slack of the wiring 35 that occurs when the top plate 3 rotates and the wiring moves can be suppressed to the minimum. It can be prevented from being sandwiched between the leg portion 2 and the leg portion 2.

  Further, when the furniture 1 with the top plate according to the second embodiment is in the second posture, the connecting portion 71B of the link portion 7 closes the cover lower opening portion 325, so that the first cover lower plate portion 326 and the connecting portion 71B rotate. It is possible to prevent the locking portion 8 provided inside the moving portion 6B from being exposed.

  Further, in the furniture 1B according to the second embodiment, the movement inducing portion 83 moves the second pin 73 inserted in the regulation groove portion 642B to the guide groove portion 641B while directly pushing the second pin 73 in the front-back direction different from the extending direction of the regulation groove portion 642B. Because of the configuration, compared with the case where the second pin 73 is moved to the guide groove portion 641B along the regulation groove portion 642B while rotating the link portion 7B, the movement from the regulation groove portion 642B of the second pin 73 to the guide groove portion 641B is increased. The movement can be performed with good operability.

Although the embodiment of the furniture according to the present invention has been described above, the present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the gist thereof.
For example, in the above-described embodiment, the furniture 1 is a table, but a chair having a seat portion (rotating body) rotatably provided with respect to the leg portion 2 (supporting body) or a rotatable table is provided. It may be a table in a chair.

Further, in the above embodiment, the guide portion 61 extends along the extending direction, and the second pin 73 of the link portion 7 is inserted and the guide groove portion 645 that is movable in the extending direction is provided. A guide rail or the like may be provided instead of the guide groove portion 645.
Further, in the above embodiment, the second lock portion 69 that restricts the rotation of the top plate 3 when the top plate 3 is in the first posture is provided, but it may not be provided. The form of the second lock portion 69 may be other than the above.
Further, in the above-described embodiment, when the top plate 3 is in the second posture, the first projecting portion 666 of the operation portion 62 locks the second pin 73 of the link portion 7 so that the link portion 7 is extended. Although it is configured to regulate the movement in the direction, the mechanism for regulating the movement of the link portion 7 may be other than the above.
Further, in the above embodiment, the frame portion 63 of the rotating portion 6 (top plate 3) is formed with the horizontal frame groove portion 633a that accommodates the link portion 7 and the guide portion 61 in the first posture. The link portion 7 and the guide portion 61 may be exposed when in the first posture.

1,1B furniture 2 legs (support)
3 Top plate (rotating body)
4,4B rotation mechanism 5,5B support section 6,6B rotation section 7,7B link section 53 first shaft section 54 second shaft section 61 guide section 64 groove section 64B groove section (guide section)
69 2nd lock part 72 1st pin (one end)
73 Second pin (other end)
84 Second pin pressing portion (first locking portion, restriction locking portion)
522 Contact surface 531 Axis 541 Axis 633a Horizontal frame groove (accommodation part)
645, 641B Guide groove 645a Front end (first end)
646, 642B Regulating groove (second end)
666 1st protrusion part (1st locking part, regulation locking part)

Claims (8)

A support,
A rotating body supported by the supporting body so as to be rotatable around a first shaft portion;
A rotating mechanism that rotates the rotating body between a first posture in which the rotating body lies down and a second posture in which the rotating body stands upright;
The support has a contact surface that contacts the rotating body in the first posture from below,
The rotation mechanism includes a link portion rotatably supported on the support body such that one end of the rotation mechanism is parallel to the first shaft portion and is rotatable about a second shaft portion.
A guide portion formed on the rotating body, extending in an extending direction orthogonal to the first shaft portion and the second shaft portion, and supporting the other end of the link portion so as to be movable along the extending direction; Have
The guide portion has a first end located at one end in the extending direction and a second end located at the other end,
When the rotating body is in the first posture, the guide portion extends horizontally, and the other end of the link portion is located on the first end side,
When the rotating body is in the second posture, the guide portion has the first end located on the upper side, the second end located on the lower side, and extends in the up-down direction, and the link portion includes the other end. Is located on the second end side.   A first lock portion that restricts movement of the other end of the link portion in the extending direction with respect to the guide portion when the rotating body is in at least one of the first posture and the second posture. The furniture according to claim 1, wherein: The guide portion has a guide groove portion that is formed along the extending direction and is movable by inserting the other end of the link portion,
The first lock portion projects from the guide groove portion in a direction intersecting the extending direction, and when the rotating body is at least one of the first posture and the second posture, the other end of the link portion is formed. The fixture according to claim 2, wherein the fixture has a restriction groove part into which the other end of the link part is inserted to restrict movement of the other end of the link part in the extending direction.   The first lock portion locks the other end of the link portion and extends the other end of the link portion when the rotating body is in at least one of the first posture and the second posture. The fixture according to claim 2, further comprising a regulation locking portion that regulates movement in a direction.   The regulation locking portion urges the other end of the link portion located at the second end of the guide portion downward when the rotating body is in the second posture, and thereby the other of the link portion. The fixture according to claim 4, wherein movement of the end of the guide portion toward the first end side is restricted.   The fixture according to claim 4 or 5, wherein the regulation locking portion is configured to be capable of switching locking and unlocking of the other end of the link portion by displacing in the extending direction.   The fixture according to any one of claims 1 to 6, further comprising: an accommodating portion that is provided on the rotating body and that accommodates the link portion and the guide portion when in the first posture. The rotary body is provided so as to be engageable with the support body when the rotary body is in the first posture. When the rotary body is engaged with the support body, the rotary body is rotated about the first shaft portion. It has a second lock part to regulate,
The fixture according to any one of claims 1 to 7, wherein the second lock portion engages with the support by coming into contact with the support from below.

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