JP4495784B2 - 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 an original 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 pivot member pivotally attached to the attachment member, and a support member that supports an original pressure plate, and is interposed between the attachment member and the support member. In the document crimping plate opening / closing device comprising a compression coil spring that biases the document crimping plate in the opening direction, the weight of the document crimping plate overcomes the biasing force of the compression coil spring, and the document crimping plate suddenly falls, As a result, there has been a technique for preventing a hand from being caught or a document from being displaced due to wind pressure with 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) Since the hydraulic damper absorbs the load energy direction as it is, the rigidity of the case that receives the piston of the damper is required.
2) The hydraulic damper is heavy because it is made of metal such as die casting, and the volume is increased in the axial direction, requiring a space for installation.
3) Since the hinge is housed in the coil spring, 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 it can solve the above-mentioned problems, is light and small, stable for long-term use, easy to maintain, and is the largest immediately before the opening and closing member is closed. An object of the present invention is to provide a hinge damper in an opening and closing device that can exhibit a braking torque and can be effectively closed.

  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 attachment member and the support member and biases the opening / closing member in the opening direction, the opening / closing member is attached and fixed to the hinge shaft of the opening / closing member. A sector gear, a drive gear meshing with the sector gear, a drive shaft inserted into and fixed to the drive gear, an eccentric shaft integrally provided with the drive shaft, and a planetary shaft rotatably attached to the eccentric shaft A gear, an internal tooth meshing with the planetary gear, a plurality of operating pins implanted in the planetary gear, and a bush provided with a friction hole through which the operating pin slides. I am characterized in. An eccentric shaft provided integrally with the drive shaft; a planetary gear rotatably attached to the eccentric shaft; an internal tooth meshing with the planetary gear; and a plurality of operating pins implanted in the planetary gear; Bushes provided with friction holes through which the operating pins slide are provided on the left and right sides of the drive shaft. Furthermore, the gear ratio between the sector gear and the drive gear is changed. Still further, it is built in the mounting member of the switchgear.

  The hinge damper in the opening / closing apparatus of the present invention can generate a large and stable braking torque immediately before the opening / closing member is closed due to the structure of a small damper function, and as a result, can exhibit energy absorbing ability. In addition, it is light and small, stable for long-term use and easy to maintain, and the number of parts is small, so that the manufacturing cost can be reduced. Further, since the structure does not use oil at all like the conventional oil damper, there is an advantage of avoiding the above-mentioned conventional problems.

  Hereinafter, an 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 pivotally attached to the front end portion via a support shaft 4 and attached with the original document pressure plate P.

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.

  FIGS. 2A and 2B illustrate the configuration of the first embodiment of the hinge damper, and the case 10 includes a case body 1a and a lid portion 1b. In the case 10, a sector gear 11, a drive gear 12, a drive shaft 13 having an eccentric portion 13a, a planetary gear 14, a plurality of operating pins 15, and a bush 16 having a plurality of friction holes 16a are provided. ing. In the case body 1a, internal teeth 17 that mesh with the planetary gear 14 are formed.

  The sector gear 11 is attached and fixed to the hinge shaft 2 of the opening / closing device H, and rotates together with the hinge shaft 2. The sector gear 11 has teeth over a rotation angle that substantially matches the rotation angle of the opening / closing device H (about 90 ° in this embodiment).

  The sector gear 11 meshes with the drive gear 12 and rotates according to the rotation of the sector gear 11. By changing the gear ratio between the sector gear 11 and the drive gear 12, the torque can be changed greatly. A drive shaft 13 is inserted into the drive gear 12 so as to rotate integrally. The drive shaft 13 is rotatably inserted into the central hole 16b of the bush 16, and an eccentric shaft 13a is integrally provided. A planetary gear 14 is rotatably attached to the eccentric shaft 13a.

  As is apparent from FIGS. 2B and 3, the planetary gear 14 meshes with the inner teeth 17. In addition, a plurality (four in this embodiment) of operating pins 15 are implanted in the planetary gear 14. As is clear from FIG. 4A, the operating pin 15 is inserted into a plurality of friction holes 16 b formed in the bush 16.

  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. Rotates, causing the drive gear 12 to rotate in the opposite direction.

  When the drive gear 12 rotates, the drive shaft 13 integrated therewith rotates. Since the drive shaft 13 is integrally provided with the eccentric portion 13a, when the drive shaft 13 rotates, the planetary gear 14 that is rotatably attached to the eccentric portion 13a rotates while meshing with the inner teeth 17. As a result, the rotation of the planetary gear 14 is greatly decelerated and rotates in the opposite direction to the drive shaft 13.

  When the planetary gear 14 rotates, the operating pin 15 implanted in the planetary gear 14 slides in the friction hole 16b of the bush 16 as shown in FIG. Then, the kinetic energy at the time of closing the original cover P is absorbed. Due to this energy absorption, the sudden drop of the original cover P immediately before closing is alleviated.

  FIG. 5 shows a second embodiment of the hinge damper according to the present invention. A drive shaft 13 having eccentric portions 13a on both sides of the drive gear 12 of the first embodiment, a planetary gear 14, and a plurality of them. By providing the actuating pin 15 and the bush 16 having the plurality of friction holes 16a, it is possible to generate a double friction torque as compared with the hinge damper of the first embodiment.

  FIG. 6 is a graph showing the relationship between the opening / closing angle of the original cover and the friction torque of the hinge damper, and it can be seen that the torque becomes maximum immediately before the original cover is closed.

  The hinge damper of the opening / closing apparatus of the present invention is not limited to the original pressure plate of the copying machine, but can be applied to applications such as a hinge that opens and closes up and down such as a lid of a scanner, a fax machine, or a Western-style toilet.

It is the side view (A) of the opening / closing apparatus of the document crimping plate provided with the hinge damper of this invention, and its operation | movement explanatory drawing (B). It is a disassembled perspective view (A) and sectional drawing (B) of the hinge damper of a 1st Example. FIG. 3 is a cross-sectional view taken along the line II in FIG. 2. It is explanatory drawing which showed the relationship between the friction hole of a bush, and an operating pin. It is a disassembled perspective view (A) and sectional drawing (B) of the hinge damper of 2nd Example. It is the graph which showed the relationship between the angle of an opening-and-closing member and friction torque.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mounting member 2 Hinge shaft 3 Support arm 4 Support shaft 5 Lift arm 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 12 Drive gear 13 Drive shaft 13a Eccentric part 14 Planetary gear 15 Actuating pin 16 Bush 16a Friction hole 16b Center hole 17 Internal tooth H Opening / closing device M Device body P Original pressure plate

Claims (4)

  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 sector gear attached and fixed to the hinge shaft of the opening / closing member, and a drive gear meshing with the sector gear A drive shaft inserted into and fixed to the drive gear, an eccentric shaft provided integrally with the drive shaft, a planetary gear rotatably attached to the eccentric shaft, and an internal tooth meshing with the planetary gear And a plurality of operating pins implanted in the planetary gear, and a bush provided with friction holes through which the operating pins slide. Par.   An eccentric shaft provided integrally with the drive shaft, a planetary gear rotatably attached to the eccentric shaft, an internal tooth meshing with the planetary gear, a plurality of operating pins implanted in the planetary gear, and the operation 2. The hinge damper according to claim 1, wherein bushes provided with friction holes for sliding movement of the pins are provided on the left and right sides of the drive shaft.   The hinge damper according to claim 1 or 2, wherein a gear ratio between the sector gear and the drive gear is changed.   The hinge damper in the switchgear according to claim 1, wherein the hinge damper is built in the mounting member of the switchgear.

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