JP4875560B2 - Cabinet stay and cabinet using the same - Google Patents

Description

  The present invention relates to a door side mounting portion fixed to the inner surface of the cabinet door, a main body side mounting portion fixed to the inner surface of the fixed wall of the cabinet, and the door side mounting portion and the main body side mounting portion. A foldable stay that is pivotally attached around the door-side rotation axis and the main-body-side rotation axis that are arranged in parallel. The door is closed by bending at an intermediate position and opened by extension. The present invention relates to a cabinet stay including an arm and a cabinet using the stay.

  As shown in FIGS. 6 to 8, a casing 51 having an opening and a door 52 for closing the opening of the casing 51 are connected by a slide hinge 53 that rotates in a turnover manner. There is a cabinet 54. The cabinet 54 includes, for example, a case in which a ceiling of a building is a casing 51 and a door 52 (canopy) for closing the opening thereof is rotated in the vertical direction. In the case of such a cabinet 54, the door 52 may be suddenly opened by its own weight, so that the casing 51 and the door 52 are connected to the cabinet stay 100 (for the purpose of opening the door 52 at a low speed. In some cases, these are simply referred to as “stays”. Each stay arm of the stay 100 is attached so as to be rotatable around a main body side rotation axis P1 and a door side rotation axis P2 provided in parallel, and around the rotation axis P3 between the stay arms. Displaces in a bent form.

  Conventionally, as this type of stay 100, there are those disclosed in Patent Documents 1 and 2. However, since the stay disclosed in this document uses a damper in which oil as a brake body is enclosed, oil leakage must be surely prevented, and attention is required for assembly. In addition, since oil flows in and out between the two chambers partitioned in the circumferential direction, it is difficult to increase the rotation angle of the stay arm (normally, 160 ° or less), and the door 52 is, for example, 180 ° or more. It is difficult to use when you want to open it. Furthermore, the brake force of the oil may change due to a change in the surrounding temperature.

Then, in order to give strength and durability with the spring of about 1 turn (one-way spring wound plate 8A in Patent Document 1), an expensive material is used, or a special tool or jig is used for assembling the spring. There is a risk of cost increase.
JP 2001-254565 A JP 2001-329745 A

  In view of the above-described problems, an object of the present invention is to provide a stay and a cabinet that can increase the rotation angle of a stay arm with a simple configuration and that can be easily assembled and adjusted in frictional force.

Means and effects for solving the problems

The present invention for solving the above problems is as follows.
A door-side mounting portion fixed to the inner surface of the cabinet door, a main body-side mounting portion fixed to the inner surface of the cabinet fixing wall, and arranged parallel to each other with respect to the door-side mounting portion and the main body-side mounting portion. A folding-type stay arm that is pivotably attached around the door-side rotation axis and the body-side rotation axis, and that closes the door by bending at an intermediate position and opens it by extension. A cabinet stay,
In the base that rotates around the main body side rotation axis, the main body side stay arm formed with a recess that opens in the direction opposite to the side where the main body side mounting portion is located, with the main body side rotation axis as the center,
A coil-shaped spiral body that is housed in the recess, has one end in the circumferential direction held by the body-side stay arm, and rotates integrally with the body-side stay arm, and opens in the same direction as the recess, and the inside of the spiral body And a cup-shaped case body that can rotate together with the spiral body, and when the main body side stay arm rotates in any one direction to close or open the door, the spiral body expands its inner diameter. Accordingly, when the main body side stay arm rotates in the other direction, the helical body is closely fitted with the case body by reducing its inner diameter. A clutch mechanism that rotates integrally;
Rotation of the case body in contact with the other of them directly or indirectly through another member in a state where the main body side attachment portion and the case body are engaged and integrated. And a friction imparting mechanism for imparting frictional resistance against,
When the main body side stay arm rotates in one direction, the spiral body is separated from the case body and rotates integrally with the main body side stay arm, while the main body side stay arm rotates in the other direction. The helical body rotates integrally with the main body side stay arm while receiving a buffer action based on the frictional resistance applied by the friction applying mechanism.

  The cabinet stay according to the present invention is configured as described above, and includes a clutch mechanism that is intermittently connected to the case body when the inner diameter of the spiral body is enlarged or reduced, and a main body side mounting portion and the case body. A friction applying mechanism that engages with either one of the members and suppresses rotation of the case body. The main body side stay arm is rotated while being separated from the case body in one direction by the clutch mechanism, and is rotated while receiving a buffering action based on frictional resistance. That is, in the cabinet stay according to the present invention, the stay arm can be rotated by 360 ° or more without being limited by the rotation angle. Thereby, the freedom degree of the attachment to a cabinet becomes high.

  The friction applying mechanism is housed inside the case body in a state of being fixed to the body-side mounting portion, and is in direct contact with the inner bottom surface and / or inner peripheral surface of the case body directly or through another member. Thus, it is possible to include an annular frictional resistance body that provides a frictional resistance against the rotation of the case body.

  Since the rotation of the spiral body (that is, the stay arm) can be braked by the mechanical frictional force of the frictional resistor, the frictional force can be reliably generated without being affected by the ambient temperature.

A pressure that is arranged opposite to the opening of the concave portion of the main body side stay arm and the opening of the case body to cover these openings from the outside, and presses the friction resistance body directly or indirectly to the inner bottom surface of the case body through another member Body,
In order to fix the pressing body to the main body side mounting portion, a shaft-like body that penetrates the main body side stay arm, the clutch mechanism, and the friction resistance body along the main body side rotation axis,
A friction adjusting mechanism that adjusts the pressing force of the frictional resistor against the case body by moving the pressing body along the shaft-like body, thereby adjusting the frictional force between the case body and the frictional resistance body; It may be.

  The position of the pressing body can be adjusted by a friction adjustment mechanism (for example, a mechanism that adjusts the frictional force by tightening an adjustment screw). For this reason, adjustment of frictional force is easy.

  A through hole that penetrates the bottom wall portion of the recess in the main body side rotational axis direction is formed in the main body side stay arm, and the friction applying mechanism is interposed between the case body inserted into the through hole and the main body side mounting portion. The contact end surface is arranged to engage with the outer surface of the case body and to contact the seat surface of the main body side mounting portion directly or indirectly through another member to provide frictional resistance against rotation of the case body. An annular auxiliary friction resistor may be included.

  Since the brake (friction resistance) is applied to the rotation of the spiral body (that is, the stay arm) with the mechanical frictional force of the auxiliary frictional resistor, the frictional force is easily adjusted without being affected by the ambient temperature. Brake (friction resistance) is provided in a balanced manner between the inner and outer surfaces of the case body (in other words, both sides of the main body side rotation axis with respect to the main body side stay arm) by the friction resistance body and the auxiliary friction resistance body. Therefore, the stay arm can be operated smoothly.

A pressure that is arranged opposite to the opening of the concave portion of the main body side stay arm and the opening of the case body to cover these openings from the outside, and presses the friction resistance body directly or indirectly to the inner bottom surface of the case body through another member Body,
In order to fix the pressing body to the main body side attaching portion, a main body side stay arm, a clutch mechanism, a friction resistance body, and a shaft-like body penetrating the auxiliary friction resistance body along the main body side rotation axis,
The pressing force of the frictional resistor against the case body is adjusted by moving the pressing body along the shaft-like body, whereby the frictional force between the case body and the frictional resistance body, the body side mounting portion, and the auxiliary frictional resistance body are adjusted. And a friction adjusting mechanism that simultaneously adjusts the frictional force between the two.

  When adjusting the frictional force, it is only necessary to push in a pressing body (for example, a lid) by a friction adjusting mechanism (for example, an adjusting screw), so that the adjustment becomes extremely easy.

The friction resistor is made of a polymer material having a lower hardness than both the pressing body and the case body. When the main body side mounting portion and the pressing body are closely adjusted by the friction adjustment mechanism, the friction resistance body rotates on the main body side. Along with the shortening in the axial direction, the contact area with the inner bottom surface of the case body increases, whereby the frictional force between the case body and the friction resistance body can be increased. Further, when the main body side mounting portion and the pressing body are adjusted to be close by the friction adjustment mechanism, the contact area with the inner peripheral surface of the case body is reduced as the friction resistance body is shortened in the main body side rotation axis direction. Thus, the frictional force between the case body and the frictional resistance body can be increased.

  Friction force between the case body and the friction resistance body by compressing the friction resistance body in the thickness direction (main body side rotation axis direction) or in the radial direction (direction orthogonal to the main body side rotation axis line) Becomes larger.

  Equipped with the above-mentioned cabinet stay, the door side mounting part is fixed to the inner surface of the door, the main body side mounting part is fixed to the inner surface of the fixed wall, and the door side mounting part and the main body side mounting part are bent. The stay arms can be connected to form a cabinet. This cabinet also includes a housing having a door that is opened and closed by being raised upward, a housing having a door that is opened and closed by being pulled downward, a building sack, a lighting bureau, and the like.

  Examples of the present invention will be described. 1 is a perspective view of a stay 101 according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of the same, FIG. 3 is a plan sectional view of a cylindrical portion 6 of a housing side stay arm 2, and FIG. FIG. 5 is a sectional view taken along the line XX of FIG. 3, and FIG. 6 is a front view of the stay 101 fixed to the housing 51 and the door 52 of the cabinet 54.

  As shown in FIGS. 1 and 6, the stay 101 of the first embodiment includes a housing side stay arm 2 fixed to the inner wall surface of the housing 51 of the cabinet 54 via the mounting seat 1, and the door of the cabinet 54. A door-side stay arm 4 fixed to the inner wall surface of 52 via a bracket 3 (door-side mounting portion). The housing-side stay arm 2 is rotatable around the axis P1 of the mounting seat 1, and the door-side stay arm 4 is rotated around the axis P2 of the bracket 3 provided in parallel with the axis P1 of the mounting seat 1. It can be rotated. Further, the housing side stay arm 2 and the door side stay arm 4 are connected by a connecting pin 5 so as to be rotatable around the axis P3.

  First, the housing side stay arm 2 will be described. As shown in FIG. 1 and FIG. 2, a cylindrical portion 6 is formed at one end portion in the longitudinal direction of the housing side stay arm 2 (end portion on the side of the mounting seat 1), and on the inner surface of the cylindrical portion 6. Is formed with a stepped shape (that is, the inner diameter of the opening opposite to the mounting seat 1 is larger than the inner diameter of the opening 6a facing the mounting seat 1). The recess 7 houses a clutch mechanism 200 (described later). Further, a groove 8 is formed at the other end in the longitudinal direction of the housing side stay arm 2. A cam portion 9 (described later) of the door side stay arm 4 is inserted into the groove portion 8. A locking groove 7a for locking an arm portion 11a (described later) of the torsion coil spring 11 is provided on the inner peripheral surface of the recess 7 along the direction of the axis P1.

  As shown in FIGS. 2 to 4, the mounting seat 1 is fixed to the inner wall surface of the casing 51 of the cabinet 54. A rotation fulcrum shaft 12 is attached to the center portion of the mounting seat 1 in a non-rotating state. The rotation fulcrum shaft 12 has a stepped cylindrical shape. A serration 12a is formed on the outer peripheral surface of the end portion (stepped portion) far from the mounting seat 1, and a female screw 12b is formed on the inner peripheral surface thereof. Is formed. A stepped disk-shaped friction seat 13 is fitted to the rotation fulcrum shaft 12 with a gap between the rotation fulcrum shaft 12 and the outer peripheral surface thereof. One side surface portion of the friction seat 13 has an outer diameter substantially the same length as the seat surface 1a of the mounting seat 1 and is attached to the seating surface 1a of the mounting seat 1 in close contact. The other side surface portion (stepped portion) of the friction seat 13 is provided with a plurality of (four in the case of the present embodiment) protrusions 13a at a constant angle in the circumferential direction. The mounting seat 1 attached with the rotation fulcrum shaft 12 being prevented from rotating is fixed to the casing 51 of the cabinet 54. Then, the friction seat 13 is fitted to the rotation fulcrum shaft 12 and is inserted into the recess 7 from the opening on one side of the cylindrical portion 6 (opening 6a on the small diameter side) in the housing side stay arm 2. As a result, the stepped portion of the friction seat 13 enters the cylindrical portion 6 of the first stay arm 3 and is disposed.

  As shown in FIGS. 2 to 4, the clutch mechanism 200 is provided in the recess 7 from the opening (large-diameter side opening) on the other side of the cylindrical portion 6 in the housing-side stay arm 2. The clutch mechanism 200 will be described. The clutch mechanism 200 of the present embodiment includes a stepped cylindrical case body 14 and a torsion coil spring 11 elastically mounted on the outer peripheral surface thereof. The case body 14 is made of, for example, a metal material, and each insertion hole 14a for inserting each projection 13a of the friction seat 13 is provided on a side surface portion on one side (side closer to the mounting seat 1). The inner diameter of the torsion coil spring 11 is slightly smaller than the outer diameter of the case body 14. For this reason, the torsion coil spring 11 is elastically mounted on the outer peripheral surface of the case body 14 in a close fitting state with the inner diameter enlarged. In this state, the torsion coil spring 11 presses the outer peripheral surface of the case body 14 in the radial direction. The other end of the torsion coil spring 11 (the side far from the mounting seat 1) is bent so as to protrude in the radial direction from its outer peripheral surface, and an arm portion 11a is formed at the bent portion. The case body 14 on which the torsion coil spring 11 is elastically mounted is attached to the concave portion 7 of the housing side stay arm 2 via a ring-shaped spacer 15. At this time, the arm portion 11a of the torsion coil spring 11 is locked to the locking groove 7a of the recess 7 of the housing side stay arm 2 (see FIG. 5). Thereby, the torsion coil spring 11 is arrange | positioned in the recessed part 7 in the non-rotatable state. 5 indicates the opening 6a on the small diameter side of the cylindrical portion 6. In FIG.

  A plurality of (eight in the case of this embodiment) projections 16 are provided at a certain angle in the circumferential direction at a portion from the bottom surface 14b of the case body 14 to the inner peripheral surface in the vicinity thereof. The case body 14 accommodates a ring-shaped spacer 19 made of a polymer material (for example, polyacetal) that is softer (having a lower hardness) than the case body 14 via a pair of washers 17 and 18. Relief portions 17 a, 18 a, and 19 a corresponding to the protrusions 16 of the case body 14 are provided on the outer peripheral surfaces of the washers 17 and 18 and the inner peripheral surface of the spacer 19, respectively. For this reason, each washer 17 and 18 and the spacer 19 are arrange | positioned with respect to the case body 14 in the rotation prevention state. Further, by disposing the washer 17 on the bottom surface 14b of the case body 14, it is not necessary to process the bottom surface of the case body 14 with high accuracy, and the processing cost of the case body 14 can be reduced.

  Subsequently, as shown in FIGS. 2 and 4, the disc spring 21 and the lid body 22 are attached from the opening (large-diameter side opening) on the other side of the cylindrical portion 6 of the housing-side stay arm 2. The outer peripheral surface of the protrusion 22a of the lid 22 is concentrically disposed on the inner peripheral surface of the spacer 19 with a slight gap, and the serration groove 22b formed on the inner peripheral surface of the protrusion 22a is rotated. The fulcrum shaft 12 is fitted to the serration 12a. Thereby, the rotation prevention of the cover body 22 is achieved. Further, the adjusting screw 23 is inserted into a screw hole provided at the center of the lid body 22 (the portion of the axis P1), and is screwed with the female screw 12b of the rotation fulcrum shaft 12. By tightening the adjustment screw 23, the disc spring 21 is pressed by the lid 22. Accordingly, the pair of washers 17 and 18, the spacer 19, the case body 14, and the spacer 15 are pressed against the bottom surface 7 b of the recess 7 of the housing-side stay arm 2, and the friction seat 13 is seated on the mounting seat 1. Pressed by 1a. As a result, a frictional force is generated between the joint surface between the case body 14 and the spacer 15 and between the friction seat 13 and the seating surface 1 a of the mounting seat 1.

  An operation when the housing side stay arm 2 is rotated with respect to the mounting seat 1 fixed to the inner wall surface of the housing 51 of the cabinet 54 will be described. As shown in FIG. 5, the housing-side stay arm 2 is rotated in the counterclockwise direction (the direction of the arrow Q1). Since the arm portion 11 a of the torsion coil spring 11 enters the locking groove 7 a of the recess 7 and is locked, the torsion coil spring 11 tries to rotate integrally with the housing side stay arm 2. Here, a gap is provided between the outer peripheral surface of the torsion coil spring 11 and the inner peripheral surface of the recess 7 of the housing side stay arm 2. Further, the case body 14 is pressed against the bottom surface 7b of the concave portion 7 through the pair of washers 17 and 18 and the spacer 19 by tightening the adjusting screw 23, and the case body 14 and the housing side stay arm 2 are A frictional force acts between the bottom surface 7 b of the recess 7 via a spacer 15. This frictional force acts to suppress the rotation of the case body 14.

  The torsion coil spring 11 tends to be separated from the outer peripheral surface of the case body 14 by rotating the housing side stay arm 2 in the direction of the arrow Q1. In other words, the inner diameter of the torsion coil spring 11 is enlarged, and the outer peripheral surface of the case body 14 is loosely fitted. Thereby, the pressing force of the torsion coil spring 11 acting on the case body 14 (friction force between the inner peripheral surface of the torsion coil spring 11 and the outer peripheral surface of the case body 14) is reduced. And the case body 14 is pressed by the bottom face 7b of the recessed part 7 of the housing side stay arm 2, and the rotation is suppressed. As a result, the torsion coil spring 11 slides on the outer peripheral surface of the case body 14 together with the housing side stay arm 2, and the housing side stay arm 2 is rotated in the direction of the arrow Q1 with a relatively small torque. .

  As shown in FIG. 5, when the housing side stay arm 2 is rotated in the clockwise direction (the direction of the arrow Q2), the torsion coil spring 11 tries to tighten the outer peripheral surface of the case body 14 more firmly, An attempt is made to rotate the case body 14 in the direction of the arrow Q2. In other words, the inner diameter of the torsion coil spring 11 is reduced, and the outer peripheral surface of the case body 14 is tightly fitted. However, the case body 14 is prevented from rotating around the axis P <b> 1 by the frictional force generated by tightening the adjustment screw 23. For this reason, the housing side stay arm 2 is rotated in the direction of the arrow Q2 with a large torque while receiving a buffer action based on the frictional resistance.

  That is, when the housing side stay arm 2 is rotated in the clockwise direction (the direction of the arrow Q1), the torsion coil spring 11 is rotated away from the case body 14 (low torque), and the housing side stay arm is rotated. When 2 is rotated in the counterclockwise direction (the direction of the arrow Q2), the torsion coil spring 11 is rotated in a form integrated with the case body 14 (high torque). This means a clutch action in which the torsion coil spring 11 and the case body 14 are intermittently connected by the rotation direction of the housing side stay arm 2.

  Next, the door side stay arm 4 will be described. As shown in FIGS. 1 and 2, one end of the door-side stay arm 4 in the longitudinal direction (the end on the side close to the housing-side stay arm 2) has an arc shape, and the cam portion 9 is located at that portion. Is formed. Further, a frame support 24 and a compression spring 25 are inserted into the groove 8 provided at the other end of the housing side stay arm 2. A disc-shaped piece 26 is inserted into the forked portion provided on the piece support 24. The top 26 is rotatably attached to the top support 24 by a support pin 27. The cam portion 9 of the door-side stay arm 4 is connected to the housing-side stay arm 2 by the connecting pin 5 in a state where the compression spring 25 is pressed in the axial direction (longitudinal direction of the housing-side stay arm 2) via the piece support 24. And are pivotally connected. At this time, the top 26 is pressed against the cam portion 9 of the door side stay arm 4 by the elastic restoring force of the compression spring 25. That is, the housing-side stay arm 2 and the door-side stay arm 4 are rotated (bent) in a form that bends about the axis P3 while receiving a pressing force by which the top 26 presses the cam portion 9.

  The other end portion of the door side stay arm 4 (the end portion far from the housing side stay arm 2) is connected to the bracket 3 by a connecting pin 28. The door-side stay arm 4 is rotatable about the axis P2 of the connecting pin 28.

  The operation of the stay 101 of the first embodiment will be described. As shown in FIG. 6, the mounting seat 1 is fixed to the inner wall surface of the casing 51 of the cabinet 54, and the bracket 3 is fixed to the inner surface of the door 52. In the closed state of the door 52, the housing side stay arm 2 and the door side stay arm 4 are arranged in a bent state around the axis P3 of the connecting pin 5. The door 52 presses the opening of the housing 51 by the action of the cam portion 9 of the door side stay arm 4. For this reason, even if some external force acts on the door 52, there is little possibility that the door 52 will be opened.

  As shown in FIG. 7, when the door 52 is opened by being supported by the slide hinge 53, the door-side stay arm 4 is lifted while rotating about the respective axes P2, P3. At the same time, the housing side stay arm 2 is lifted while rotating in the direction of the arrow Q1 about the axis P1. The direction of the arrow Q1 is a direction in which the inner peripheral surface of the torsion coil spring 11 expands (the direction in which the inner peripheral surface of the torsion coil spring 11 is separated from the outer peripheral surface of the case body 14, see FIG. 5). 11 slides on the outer peripheral surface of the case body 14. For this reason, the door 52 is opened with low torque. The door 52 temporarily stops at an angle θ with respect to the opening surface of the housing 51 by the action of the cam portion 9 of the door side stay arm 4.

  Further, when the door 52 is raised, the housing-side stay arm 2 and the door-side stay arm 4 are displaced while rotating around the axis lines P1 to P3 in the same manner as described above, and as shown in FIG. They stop in a straight line. Since the housing side stay arm 2 requires a large torque when rotating in the direction opposite to the arrow Q1 (the direction of the arrow Q2), the door 52 is closed even if some external force acts on the door 52. Is avoided.

  The door 52 is closed by the reverse operation of the above process. As described above, when the housing side stay arm 2 is rotated in the direction of the arrow Q2 (see FIG. 8), a relatively large torque (friction force generated by pressing the case body 14 via the spacer 19) is generated. Therefore, it is necessary to rotate against this torque.

  In the case of the stay 101 of the present embodiment, since the clutch mechanism 200 of the torsion coil spring 11 is used, the housing side stay arm 2 can be rotatably attached to the attachment seat 1. On the other hand, in the conventional stay (for example, what is disclosed in the technical document 1), it is difficult to increase the rotation angle of the stay arm (usually 160 ° or less), and the door 52 is For example, it is difficult to use when it is desired to open 180 ° or more. However, in the stay 101 of the present embodiment, the rotation angle of the housing-side stay arm 2 is not limited, and can be used when the door 52 is desired to be opened, for example, 180 ° or more. In addition, the degree of freedom of the mounting position of the stay 101 is increased.

  Further, in the stay 101 of the present embodiment, by attaching the torsion coil spring 11 in the opposite direction, a large torque can be applied when the housing side stay arm 2 is rotated in the direction of the arrow Q1. . That is, in the above-described cabinet 54, a large torque can be applied when the door 52 is opened, and a small torque can be applied when the door 52 is closed.

  Next, with reference to FIGS. 9 and 10, only the portions of the stay 102 of the second embodiment different from the stay 101 of the first embodiment will be described. In the stay 102 of the second embodiment 4, the spacer 31 accommodated in the case body 29 is made of a softer polymer material (for example, polypropylene).

  As shown in FIG. 10, the spacer 31 mounted on the inner surface of the case body 29 is pressed in the direction of the axis P <b> 1 when the adjustment screw 23 inserted through the lid body 32 is tightened. Thereby, a frictional force is generated between the case body 29 and the spacer 31, and the rotation of the case body 29 is suppressed. In FIG. 10, the outer peripheral surface of the spacer 31 attached to the case body 29 (the state in which no pressing force is applied) is indicated by a two-dot chain line, and is compressed in the direction of the axis P1 when the pressing force is applied. A state in which the spacer 31 is expanded in the radial direction is indicated by a solid line.

  As shown in FIG. 11, a mortar-shaped inclined surface 31 a is provided in the opening portion of the spacer 31, and a taper corresponding to the inclined surface 31 a of the spacer 31 is provided at a joint portion between the back surface of the lid 32 and the stepped shaft portion. The shape portion 32a may be formed. In this case, since the spacer 31 is pressed obliquely, the spacer 31 presses the case body 29 more reliably not only in the direction of the axis P1 but also in the radial direction. Thereby, a larger frictional force is generated between the case body 29 and the spacer 31, and the rotation of the case body 29 is reliably suppressed.

  Even in the case of the stay 102 of the second embodiment, there is no limitation on the rotation of the housing-side stay arm 2, so that the same effect as the stay 101 of the first embodiment can be obtained.

  In the stays 101 and 102 of the above-described embodiments, a lubricant such as grease (for example, silicon oil) may be applied to the inside of the case bodies 14 and 29, or the case body may be made of an oil-containing resin. Thereby, the torsion coil spring 11 (namely, the housing side stay arm 2) can be rotated more smoothly.

  The stays 101 and 102 of each of the embodiments described above can be used not only for the door 52 (upper cover and lower cover) of the cabinet 54 but also for a top bag of a building, a lighting bureau, and the like.

It is a perspective view of the stay 101 of 1st Example of this invention. It is an exploded perspective view similarly. FIG. 5 is a plan sectional view of a cylindrical portion 6 of a housing side stay arm 2. It is sectional drawing which shows the assembly | attachment state of a clutch mechanism. It is the XX sectional view taken on the line of FIG. 3 is a front view of a stay 101 fixed to a housing 51 and a door 52 of a cabinet 54. FIG. It is action | operation explanatory drawing of the state which opened the door 52 and was once stopped. It is action explanatory drawing of the state which opened the door 52 fully. It is a disassembled perspective view of the stay 102 of 2nd Example. It is a plane sectional view of cylindrical part 6 of case side stay arm 2 in stay 102 of the 2nd example. It is a top sectional view of cylindrical part 6 of case side stay arm 2 to which spacer 31 of another example was attached.

Explanation of symbols

101, 102 Stay 200 Clutch mechanism 1 Mounting seat (main body side mounting part)
2 Housing side stay arm (stay arm, body side stay arm)
3 Bracket (door side mounting part)
4 Door side stay arm (stay arm)
6 Cylindrical part (base)
6a Opening (through hole)
7 Recess 7a Bottom (bottom wall of the recess)
11 Torsion coil spring (spiral)
12 Rotating fulcrum shaft (shaft-shaped body)
13 Friction seat (sub-friction resistor)
14, 29 Case body 14a Insertion hole (outer surface of case body)
14b Bottom (inner bottom of the case body)
17, 18 Washer (sub friction resistance)
19, 31 Spacer (friction applying mechanism, friction resistance)
22, 32 Lid (friction applying mechanism, pressing body)
23 Adjustment screw (friction application mechanism, friction adjustment mechanism)
P1 axis (main body side rotation axis)
P2 axis (door side rotation axis)

Claims (8)

A door-side mounting portion fixed to the inner surface of the cabinet door, a main body-side mounting portion fixed to the inner surface of the cabinet fixing wall, and arranged parallel to each other with respect to the door-side mounting portion and the main body-side mounting portion. A folding-type stay arm that is pivotably attached around the door-side rotation axis and the body-side rotation axis, and that closes the door by bending at an intermediate position and opens it by extension. A cabinet stay,
In the base that rotates around the main body side rotation axis, the main body side stay arm formed with a recess that opens in the direction opposite to the side where the main body side mounting portion is located, with the main body side rotation axis as the center,
A coil-shaped spiral body that is housed in the recess, has one end in the circumferential direction held by the body-side stay arm, and rotates integrally with the body-side stay arm, and opens in the same direction as the recess, and the inside of the spiral body And a cup-shaped case body that can rotate together with the spiral body, and when the main body side stay arm rotates in any one direction to close or open the door, the spiral body expands its inner diameter. Accordingly, when the main body side stay arm rotates in the other direction, the helical body is closely fitted with the case body by reducing its inner diameter. A clutch mechanism that rotates integrally;
Rotation of the case body in contact with the other of them directly or indirectly through another member in a state where the main body side attachment portion and the case body are engaged and integrated. And a friction imparting mechanism for imparting frictional resistance against,
When the main body side stay arm rotates in one direction, the spiral body is separated from the case body and rotates integrally with the main body side stay arm, while the main body side stay arm rotates in the other direction. The cabinet stay is characterized in that the helical body rotates integrally with the main body side stay arm while receiving a buffer action based on a frictional resistance imparted by the friction imparting mechanism.   The friction applying mechanism is housed inside the case body in a state of being fixed to the body-side mounting portion, and directly or indirectly through another member on the inner bottom surface and / or inner peripheral surface of the case body. The cabinet stay according to claim 1, further comprising an annular frictional resistor that is brought into contact to provide frictional resistance against rotation of the case body. The main body side stay arm is opposed to the opening of the recess and the opening of the case body so as to cover the opening from the outside, and the friction resistance body is directly or indirectly through another member. A pressing body that presses to
In order to fix the pressing body to the main body side mounting portion, a shaft-like body that penetrates the main body side stay arm, the clutch mechanism, and the friction resistance body along the main body side rotation axis, and
Friction adjustment for adjusting the pressing force of the frictional resistance against the case body by moving the pressing body along the shaft-like body, thereby adjusting the frictional force between the case body and the frictional resistance body The cabinet stay according to claim 2, further comprising a mechanism. The main body side stay arm is formed with a through-hole penetrating the bottom wall portion of the recess in the main body side rotation axis direction,
The friction applying mechanism is disposed between the case body inserted into the through hole and the main body side mounting portion and engages with the outer surface of the case body, and directly or directly on the seat surface of the main body side mounting portion. The cabinet stay according to claim 2, further comprising an annular sub-friction resistor having a contact end surface for making a friction resistance against rotation of the case body by contacting indirectly through another member. . The main body side stay arm is opposed to the opening of the recess and the opening of the case body so as to cover the opening from the outside, and the friction resistance body is directly or indirectly through another member. A pressing body that presses to
In order to fix the pressing body to the main body side mounting portion, a shaft-like body that penetrates the main body side stay arm, the clutch mechanism, the friction resistance body, and the auxiliary friction resistance body along the main body side rotation axis,
The pressing force of the frictional resistor against the case body is adjusted by moving the pressing body along the shaft-like body, whereby the frictional force between the case body and the frictional resistance body and the attachment on the main body side are adjusted. The cabinet stay according to claim 4, further comprising a friction adjustment mechanism that simultaneously adjusts a frictional force between the portion and the auxiliary frictional resistor. The frictional resistance body is composed of a polymer material having a lower hardness than both the pressing body and the case body,
When the body side mounting portion and the pressing body are adjusted to be close to each other by the friction adjustment mechanism, the friction resistance body is brought into contact with the inner bottom surface of the case body as it is shortened in the body side rotation axis direction. 6. The cabinet stay according to claim 3, wherein an area is increased, and thereby a frictional force between the case body and the frictional resistance body is increased. When the main body side attaching portion and the pressing body are adjusted to approach each other by the friction adjustment mechanism, the friction resistance body is shortened in the main body side rotation axis direction, and the inner peripheral surface of the case body is The cabinet stay according to claim 6, wherein a contact area increases, and thereby a frictional force between the case body and the friction resistance body increases. A cabinet stay according to any one of claims 1 to 7,
The door side mounting portion is fixed to the inner surface of the door, and the main body side mounting portion is fixed to the inner surface of the fixed wall.
A cabinet characterized in that the foldable stay arm connects the door-side mounting portion and the main body-side mounting portion.

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