JP4418952B2 - Hinge damper in switchgear - Google Patents

Description

  The present invention relates to a hinge damper in an opening / closing device for safely and smoothly opening / closing an opening / closing member such as a document pressure plate of a copying machine or a toilet seat opening / closing member of a toilet.

  2. Description of the Related Art Conventionally, an attachment member attached to an apparatus main body such as a copying machine, a support member pivotally attached to the attachment member and supporting an original cover, and interposed between the attachment member and the support member. In addition, in the document crimping plate opening / closing device comprising a compression coil spring that urges the document crimping plate in the opening direction, the weight of the document crimping plate surpasses the biasing force of the compression coil spring, and the document crimping plate suddenly drops, As a result, there has been a technique for preventing the position of the document from being pinched by a wind pressure or a wind pressure by a fluid damper. (For example, see Patent Document 1)

However, the conventional technique for preventing a sudden drop of the original pressure bonding plate has the following problems because it uses a hydraulic damper.
1) The rigidity of the case that receives the piston is required to absorb it as it is in the load energy direction.
2) Since it is a metal product such as die-casting, it is heavy and its volume is increased in the axial direction, requiring a space for installation.
3) Since it is housed in the coil spring of the hinge, the spring itself becomes large.
4) Since oil viscosity resistance is converted into thermal energy, it becomes hot when used continuously. Also, the oil viscosity resistance is unstable because it depends on the external temperature. Therefore, there is a disadvantage that the performance does not appear during the continuous opening and closing operation of the switchgear.
5) If the original cover is forcibly closed, an overload is applied to the damper, and the internal hydraulic pressure increases suddenly and may be damaged.
6) Since the piston rod of the damper is weak against the eccentric load, it is necessary to operate it with high accuracy, which is liable to cause oil leakage and damage to the device.
7) Surrounding oil and moisture are likely to adhere to the piston rod and damage the packing or cause malfunction.
8) Environmental measures such as oil treatment are required when discarding.
9) Due to the temperature dependence of the oil, the damper performance changes significantly where the operating temperature is other than room temperature.
Utility Model Registration No. 2558914

  The problem to be solved by the present invention is that the above-mentioned problems can be solved, it is light and small, stable for long-term use and easy to maintain, and is the largest immediately before the original cover is closed. An object of the present invention is to provide a hinge damper in an opening / closing device that can be effectively closed by exerting braking torque.

  The hinge damper in the opening / closing apparatus of the present invention includes an attachment member attached to an apparatus main body such as a copying machine, a support member pivotally attached to the attachment member and supporting an opening / closing member such as a document crimping plate, In an opening / closing device comprising an elastic body such as a compression coil spring or a urethane elastomer foam that is inserted between the mounting member and the support member and biases the opening / closing member in the opening direction, the rotation pivotally attached to the case A shaft, a gear ring rotatably attached to the rotating shaft and having internal teeth, means for transmitting the rotation of the opening / closing member to the gear ring, and a tooth meshing with the internal teeth of the gear ring, and the rotating shaft A gear planet that is rotatably attached to an integral eccentric shaft portion, and the rotation of the gear ring is controlled at the center by restricting the rotation of the gear planet. A rotation restricting means allowed to circular locus movement heart around, characterized in that it is composed of means for absorbing the rotational energy of the gearing. Also, an attachment member attached to an apparatus main body such as a copying machine, a support member pivotally attached to the attachment member and supporting an opening / closing member such as an original pressure plate, and a space between the attachment member and the support member A rotating shaft pivotally attached to a case and rotating about the rotating shaft in an opening / closing device made of an elastic body such as a compression coil spring or urethane elastomer foam that is inserted into the opening and urges the opening / closing member in the opening direction A gear ring that is freely attached and formed with internal teeth, means for transmitting the rotation of the opening and closing member to the gear ring, and an eccentric shaft portion that has teeth that mesh with the internal teeth of the gear ring and that is integral with the rotary shaft It is characterized by comprising a gear planet that is rotatably attached and means for absorbing rotational energy of the gear planet. Further, the means for transmitting the rotation of the opening / closing member to the gear ring is a sector gear. Still further, the means for restricting the rotation of the gear planet comprises an operation pin implanted in the gear planet, and a bush having a hole through which the operation pin is inserted to restrict its movement. Furthermore, the means for absorbing the rotational energy of the gear ring comprises a plate planet having friction teeth formed on the gear ring and a corrugated peripheral surface in sliding contact therewith. Further, the means for absorbing the rotational energy of the gear planet is composed of a friction plate having a friction pin attached to the gear planet and a friction outer peripheral cam with which the friction pin comes into frictional contact. Further, the friction outer peripheral cam is formed so as to generate a peak of friction torque immediately before the opening / closing member is closed. Still further, the present hinge damper is incorporated in the mounting member of the opening / closing member.

  The hinge damper in the switchgear according to the present invention has advantages such as being capable of exhibiting a large energy absorption capacity due to the structure of a small damper function, and being light and small in size and stable and easy to maintain for a long period of time. . Further, since the structure does not use oil at all like the conventional oil damper, it has an advantage of avoiding the above-mentioned conventional problems. Furthermore, there is an advantage that the maximum braking torque can be exhibited immediately before the original cover is closed.

  Hereinafter, each embodiment of the hinge damper in the opening and closing apparatus of the present invention will be described with reference to the drawings.

  In FIG. 1, P is a document pressure plate, and is attached to an apparatus body M such as a copying machine via an opening / closing device H so as to be freely opened and closed. The opening / closing device H includes an attachment member 1 attached to the device main body M, a support arm 3 pivotally attached to the attachment member 1 via a hinge shaft 2, and the support arm 3. It is mainly composed of a lift arm 5 which is pivotally attached to the front end portion via a support shaft 4 and to which the original cover P is attached.

A first slider 6 and a second slider 7 are slidably accommodated in the longitudinal direction in the support arm 3, and a compression coil spring 8 is interposed between the first and second sliders 6, 7. Yes. A urethane elastomer foam may be used in place of the compression coil spring 8. The cam follower 6 a of the first slider 6 abuts on the cam portion 9 installed on the mounting member 1, and the cam follower 7 a of the second slider 7 abuts on the front side plate 5 a of the lift arm 5. The opening / closing device H according to the present invention is not limited to the above-described structure. For example, the support shaft 4 and the lift arm 5 are omitted, and the document pressing plate P is attached and fixed to the support arm 3. Any known structure may be used.
A hinge damper case 10 is mounted in the mounting member 1 near the hinge shaft 2.

  2 and 3 are diagrams for explaining the configuration of the hinge damper, and the case 10 includes a case body 10a and a lid portion 10b. In the case 10, a sector gear 11, a gear ring 12, a rotating shaft 13, a gear planet 14, an operating pin 15, a plate planet 16 and a bush 17 are provided.

  The sector gear 11 is fixedly attached to the hinge shaft 2 of the opening / closing device H, and rotates with the rotation of the hinge shaft 2. In the sector gear 11, teeth 11a are formed over a rotation angle that substantially coincides with the rotation angle of the opening / closing device H (about 90 ° in the present embodiment).

  As is apparent from FIG. 4, the gear ring 12 has teeth 12a, internal teeth 12b, and friction teeth 12c. The gear 12a meshes with the teeth 11a of the sector gear 11. Accordingly, the gear ring 12 is rotated via the sector gear 11 as the hinge shaft 2 of the opening / closing device H is rotated.

  The rotating shaft 13 is rotatably attached to the lid portion 10b of the case 10 and the bush 17 and has an eccentric shaft portion 13a. The gear planet 14 is pivotally attached to the eccentric shaft portion 13a.

  The gear planet 14 is formed with teeth 14 a and eight operating pins 15. The gear 14a meshes with the internal teeth 12b of the gear ring 12, as shown in FIG.

  As apparent from FIG. 6A, a corrugated peripheral surface 16a is formed around the plate planet 16, and the friction teeth 12c of the gear ring 12 are in sliding contact with the surface of the corrugated peripheral surface 16a. The plate planet 16 has a hole 16b through which the operating pin 15 passes. The plate planet 16 is also pivotally attached to the eccentric shaft portion 13 a of the rotating shaft 13 in the same manner as the gear planet 14.

  The bush 17 is fixed to the inner part of the case body 10a so as not to rotate, and rotatably supports the rotary shaft 13. As is clear from FIG. 7, the bush 17 is also formed with a hole 17a, and the tip of the operating pin 15 is inserted.

  Since the hinge damper of this embodiment is configured as described above, when the original cover P is closed as shown by an arrow in FIG. 1B, the sector gear 11 integrated with the hinge shaft 2 is closed. However, as indicated by the arrow in FIG. 2B, the gear 12a of the gear ring 12, that is, the gear ring 12 is rotated in the clockwise direction by rotating counterclockwise.

  When the gear ring 12 rotates, it tries to rotate the gear planet 14 via the teeth 14a meshing with the inner teeth 12b. However, the gear planet 14 has the operating pin 15 implanted in the gear planet 14 inserted through the hole 17a of the bush 17 fixed to the case 10, and is prevented from rotating. On the other hand, the gear planet 14 is pivotally attached to an eccentric shaft portion 13 a that is eccentric from the rotation shaft 13. As a result, as shown in FIGS. 8A to 8D, the gear planet 14 has its center 12d (the center of the eccentric shaft portion 13a) without rotating, that is, without changing its direction. Is rotated around the center 13b of the rotary shaft 13. At this time, the operating pin 15 is moving in a circle in the hole 17a of the bush 17, as shown in FIG.

  Since the operating pin 15 moves so as to draw a circle also in the hole 16a of the plate planet 16, the same circular locus movement is performed without changing the direction of the plate planet 16. When the plate planet 16 moves in a circular locus, the corrugated peripheral surface 16a swings to allow rotational movement of the friction teeth 12c that are in sliding contact therewith.

  The kinetic energy when the original cover P is closed is absorbed by the circular locus movement of the operating pin 15 in the hole 17a of the bush 17 and the sliding movement of the corrugated peripheral surface 16a of the plate planet 16 and the friction teeth 12c. Will be.

The means for transmitting the rotation of the opening / closing member H of the present invention to the gear ring 12 is not limited to the gear mechanism such as the sector gear 11, but may be a power transmission mechanism using a belt or a link, for example.

  As means for regulating the rotation of the gear planet 14 of the present invention, a bush having an operating pin 15 implanted in the gear planet 14 of the above embodiment and a hole 17a through which the operating pin 15 is inserted to regulate its movement. However, the present invention is not limited to the above-described configuration, and any configuration may be used as long as the rotation of the center of the gear planet 14 is allowed while the rotation is restricted.

  The means for absorbing the rotational energy of the gear ring 12 of the present invention is not limited to the configuration of the plate planet 16 having the friction teeth 12c formed on the gear ring 12 and the corrugated peripheral surface 16a slidably contacting the friction teeth 12c. 12 may be a means for applying a desired resistance to the rotation of 12 or an energy absorbing means such as a frictional resistance or a magnetic resistance.

    9 and 10 show another embodiment. The case 10, the case body 10a, the lid portion 10b, the sector gear 11, the teeth 11a, the gear ring 12, the gear 12a, the internal teeth 12b, the center 12d, the rotating shaft 13, The eccentric shaft portion 13a, the center 13b, the gear planet 14 and the teeth 14a have substantially the same structure and function as each member of the first embodiment.

  Four friction pins 18 are rotatably attached to the gear planet 14. Reference numeral 19 denotes a friction plate, and a friction outer peripheral cam 19a is formed on the gear planet 14 side. As shown in FIG. 11A, the friction pin 18 is in frictional contact with the friction outer circumferential cam 19a. In the present embodiment, the friction outer peripheral cam 19a is formed on both surfaces of the friction plate 19, but each has a different cam curve so that one friction plate 19 can be used for two types of applications. In actuality, only the friction outer peripheral cam 19a on the gear planet 14 side functions.

  Accordingly, when the original cover P is closed as indicated by an arrow in FIG. 1B, the gear planet 14 is rotated via the sector gear 11 and the gear ring 12, as shown in FIG. The friction pin 18 moves from the solid line state through the broken line state to the two-dot chain line state as indicated by an arrow. As the friction pin 18 moves, the torque between the friction outer peripheral cam 19a changes. That is, when the original crimping plate P is rotated in the closing direction, the gravity of the original crimping plate P gradually overcomes the repulsive force of the compression coil spring 8 and tries to fall abruptly. Thus, the torque changes so as to increase, and immediately before the document crimping plate P is closed (when the document crimping plate P is in an upright state of 0 ° and the closed horizontal state is 90 °, it is around 80 °. ) To produce maximum torque. FIG. 12 shows the relationship between the rotation angle of the original cover P, that is, the rotation angle of the friction pin 18 and the torque. The torque rises sharply from around 70 ° and peaks immediately before 80 °.

  The hinge damper of the opening / closing device of the present invention is not limited to the original pressure plate of the copying machine, but can also be applied to applications such as a hinge for opening / closing an opening / closing member such as a scanner, a fax machine, or a lid of a Western-style toilet.

It is the side view (A) and its operation | movement figure (B) of the opening / closing apparatus of the document crimping board provided with the hinge damper of this invention. It is sectional drawing (A) of the hinge damper of a 1st Example, and its II sectional drawing (B). It is the cross-sectional perspective view decomposed | disassembled to the axial direction of FIG. It is a perspective view of a gear ring and a gear planet. It is a relation explanatory view of a gear ring and a gear planet. It is operation | movement explanatory drawing of a plate planet. It is action | operation explanatory drawing of the operating pin of a gear planet. It is explanatory drawing of a motion of the gear planet within a gear ring. It is sectional drawing of the hinge damper of a 2nd Example. FIG. 9 is an exploded perspective view of FIG. 8. It is explanatory drawing which shows the engagement state of a friction pin and a friction outer periphery cam. It is a graph which shows the relationship between the rotation angle of a friction pin, and a torque.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mounting member 2 Hinge shaft 3 Support arm 4 Support shaft 5 Lift arm 5a Front side plate 6 1st slider 6a Cam follower 7 2nd slider 7a Cam follower 8 Compression coil spring 9 Cam part 10 Case 10a Case main body 10b Cover part 11 Sector gear 11a Tooth ring 12 12a Gear 12b Internal teeth 12c Friction teeth 12d Center 13 Rotating shaft 13a Eccentric shaft portion 13b Center 14 Gear planet 14a Tooth 14b Hole 15 Actuation pin 16 Plate planet 16a Wave surface 16b Hole 17 Bush 17a Hole 18 Friction plate 19 Friction pin 19 Peripheral cam H Opening / closing device M Device body P Original plate

Claims (8)

  A mounting member attached to a main body of a copying machine or the like; a support member pivotally attached to the mounting member and supporting an opening / closing member such as a document crimping plate; and an intermediate member between the mounting member and the support member. In an opening / closing device comprising an elastic body such as a compression coil spring or a urethane elastomer foam that is inserted and urged in the opening direction of the opening / closing member, a rotating shaft pivotally attached to a case and a rotating shaft rotatably A gear ring which is attached and formed with internal teeth, a means for transmitting the rotation of the opening and closing member to the gear ring, and a tooth which meshes with the internal teeth of the gear ring and which is rotatable about an eccentric shaft unit integrated with the rotary shaft Gear planet attached to the gear, and rotation regulating means for regulating the rotation of the gear planet and causing the center of the gear planet to move around the rotation center of the gear ring. Hinge damper, characterized in that it is composed of means for absorbing the rotational energy of the gearing.   A mounting member attached to a main body of a copying machine or the like; a support member pivotally attached to the mounting member and supporting an opening / closing member such as a document crimping plate; and an intermediate member between the mounting member and the support member. In an opening / closing device comprising an elastic body such as a compression coil spring or a urethane elastomer foam that is inserted and urged in the opening direction of the opening / closing member, a rotating shaft pivotally attached to a case and a rotating shaft rotatably A gear ring which is attached and formed with internal teeth, a means for transmitting the rotation of the opening and closing member to the gear ring, and a tooth which meshes with the internal teeth of the gear ring and which is rotatable about an eccentric shaft unit integrated with the rotary shaft A hinge damper comprising: a gear planet attached to the gear planet; and means for absorbing rotational energy of the gear planet. 3. A hinge damper according to claim 1, wherein the means for transmitting the rotation of the opening / closing member to the gear ring is a sector gear.   The means for restricting the rotation of the gear planet comprises an operating pin implanted in the gear planet and a bush having a hole through which the operating pin is inserted to restrict its movement. The hinge damper in the switchgear described in 1.   5. The switchgear according to claim 1, 3 or 4, wherein the means for absorbing rotational energy of the gear ring comprises a friction planet formed on the gear ring and a plate planet having a corrugated peripheral surface in sliding contact with the friction tooth. Hinge damper in   The means for absorbing the rotational energy of the gear planet comprises a friction plate having a friction pin attached to the gear planet and a friction outer peripheral cam with which the friction pin comes into frictional contact. Hinge damper in the opening and closing device.   The hinge damper according to claim 6, wherein the friction outer peripheral cam is formed so as to generate a peak of friction torque immediately before the opening / closing member is closed.   8. The hinge damper in an opening / closing device according to claim 1, wherein the hinge damper is incorporated in a mounting member of the opening / closing member.

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