JP2015146350A - Opening and closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening and closing device capable of smoothly displacing a door body from an open position to a closed position and easily changing spring force with a simple configuration.SOLUTION: A shaft member (4) is provided in an opening (2) of a casing (3), and a door body (5) is rotatably provided in this shaft member (4) between a closed position for closing the opening (2) and an open position for opening the opening (2). To the shaft member (4), a spring member (6) is attached spring-biasing the door body (5) in the closing direction from the open position to the closed position, and in the casing (3), braking means (7) is provided giving brake force to rotation in the closing direction of the door body (5).

Description

  The present invention relates to an opening / closing device capable of smoothly opening and closing a door body such as a flapper that covers a card insertion portion or the like provided in a POS terminal or an external device incorporated in a fueling device installed in a gas station, for example.

  Conventionally, in addition to the above-mentioned POS (Point of Sale) terminals and external devices, the cover body provided on the housing of various electronic devices has a card insertion portion, various operation switches, etc. A portion where the card insertion portion and the operation switch are provided is exposed from the opening portion, and the opening portion is covered by a door body also called a flapper so as to be opened and closed. Such a door body has a structure in which the door body is displaced from the open position to the closed position only by its own weight, and a structure in which the door body naturally falls by its own weight, but is slowly displaced from the open position to the closed position in conjunction with the damper device. Are known.

  The former structure in which the door body is displaced from the open position to the closed position only by its own weight is described in Patent Document 1, for example. In this prior art, in order to facilitate the opening and closing operation of the door body with a simple structure, the opening speed when the door body provided at the opening of the housing is opened by its own weight around the rotation center axis by the operation of the operator In order to slow down, a spring member is used. One end of the spring member is attached near the rotation center axis of the door body, and the other end is inserted into a hole formed in the spring member movable portion. A magnet is provided on the upper portion of the door body, and an attracting portion called a catcher is provided on the housing at a position facing the magnet. When the operator pulls the free end of the door body against the magnetic attraction of the magnet's attracting part, the door body rotates by its own weight around the rotation center axis provided near the lower end of the door body. When the vicinity of the open position is reached, the opening speed of the door body is gradually decreased by the spring force of the spring member, and the smooth opening / closing operation of the door body can be realized with a simple structure.

  Moreover, the latter structure which opens a door body slowly by the braking effect by a damper although the door body falls naturally with dead weight is described in patent document 2, for example. In this prior art, a lower end portion of a door body is rotatably connected to an opening portion of a casing, and the torsion coil spring that urges the door body in the opening direction in an opening / closing device in which the upper end portion moves up and down. A biasing means and a damper that adjusts against the biasing force of the opening / closing speed biasing means of the door body, the door body from a substantially closed state to a second opening angle narrower than a predetermined first opening angle The door body is opened by the self weight of the door body and the urging force of the urging means, and from the second opening angle to the first opening angle, the urging force of the urging means is released and the inertia force and the self weight of the door body are released. And is configured to open by. Thereby, before the door body reaches the open position, the bounce of the door body can be suppressed without receiving the urging force by the urging means.

JP 2002-21422 A JP 2002-246768 A

  In each of the prior arts described in Patent Documents 1 and 2, the door body rotates from its closed position to its open position by its own weight with the lower part of the door body as the center of rotation. When the door body rotates to the open position and stops, there is a problem that the inertia force of the door body acts intensively on the rotation center axis provided at the rotation center, and the rotation center axis is easily damaged. is there. Further, since the door body rotates by its own weight, the opening speed of the door body changes from the closed position to the open position, and the door body is opened and the operator performs the next operation such as insertion of a card. There is a problem that it is difficult to assume the displacement of the door body and the operability is poor.

  Furthermore, when a large spring force is required for changes in the shape and weight of the door body, the spring installation work is complicated, and the spring force can be increased without increasing the spring installation space. In addition, there is a problem that workability at the time of installing the door body is poor.

  An object of the present invention is to provide an opening / closing device capable of smoothly displacing a door body from an open position to a closed position and easily changing a spring force with a simple configuration.

The present invention includes a housing in which an opening is formed,
A shaft member disposed horizontally in the opening;
Arranged in the housing so as to be rotatable around the axis of the shaft member in a state of being hooked on the shaft member over a closed position for closing the opening and an open position for opening the opening. A door,
A spring member attached to the shaft member and biasing the door body in a closing direction rotating from an open position toward a closed position;
An opening / closing apparatus comprising: a braking means provided on the housing and applying a braking force to the door body in a direction against the rotation in the closing direction.

In the present invention, the spring member is
A plurality of coil parts made of a metal wire wound in a cylindrical shape, the coil part through which the shaft member is inserted; and
One arm part that consists of a metal wire extending from one end of each coil part and presses the door body in the closing direction;
The other arm part which consists of a metal wire extended from the other end of each said coil part and is supported by the opening part of the said housing is characterized by the above-mentioned.

In the invention, it is preferable that the braking means is
A first gear that is inserted into and fixed to the shaft member;
A second gear that meshes with the first gear, and a damper that decelerates the rotation of the second gear by a flow resistance caused by a viscous fluid.

  According to the present invention, an opening is formed in the housing, and the shaft member is disposed horizontally in the opening. In addition, a door body is disposed on the housing while being hooked on the shaft member. The door body can be rotated around the axis of the shaft member over a closed position for closing the opening and an opening position for opening the opening. A spring member is attached to the shaft member, and the spring member biases the door body in the closing direction in which the door body rotates from the open position toward the closed position. The casing is provided with a braking means for applying a braking force in a direction against the rotation of the door body in the closing direction. Therefore, the door body is displaced in the closing direction by its own weight and the spring force by the spring member, and a braking force is applied by the braking means so as to resist the displacement in the closing direction, whereby the door body is moved from the open position to the closed position. The rotation speed is reliably displaced and the rotation speed is suppressed by the braking force of the braking means, and the rotation position can be reliably rotated without causing a large speed change. The door body is hooked to a shaft member disposed horizontally in the opening, and the spring member is mounted and attached to the shaft member, so that the mounting work of the spring member and the door body is easy. The number of points is small, and the configuration can be simplified.

  According to the invention, since the spring member is composed of a torsion spring having a plurality of coil portions, a large spring force can be realized within a range that can be attached to, for example, a shaft member without increasing the diameter of the coil portion. Can do. As a result, the mounting work of the spring member to the shaft member is facilitated, and the space occupied by the spring member is reduced, and the structure is stable and reliable with a simple structure without increasing the size and complexity of the structure. In addition, it is possible to realize an opening / closing device capable of rotating the door body from the open position to the closed position.

  According to the invention, the braking means includes the first gear fixed to the shaft member, and the damper portion having the second gear meshing with the first gear. The damper portion decelerates the rotation of the second gear by the flow resistance caused by the viscous fluid. By using such a braking means, the change in flow resistance with respect to the rotation of the second gear is slow with respect to the change in the rotation speed transmitted from the first gear to the second gear, and the door body has a rapid change in speed. Rotation of the door body in the closing direction can be further smoothed.

It is a perspective view showing opening and closing device 1 of one embodiment of the present invention. 2 is an exploded perspective view of the opening / closing device 1. FIG. 2 is a front view of the opening / closing device 1 showing a state in which an opening 2 is closed by a door body 5. FIG. FIG. 4 is an enlarged cross-sectional view of the opening / closing device 1 as seen from a cutting plane line IV-IV in FIG. 3. It is an expansion perspective view of the spring member 6 and its vicinity. It is an expansion perspective view of the spring member 6 and its vicinity. It is sectional drawing which shows the state of the spring member 6 when the door body 5 is arrange | positioned in an open position. It is sectional drawing which shows the state of the spring member 6 when the door body 5 is arrange | positioned in a closed position. It is the expanded sectional view seen from the cut surface line VII-VII of FIG.

(First embodiment)
FIG. 1 is a perspective view showing an opening / closing device 1 according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the opening / closing device 1. The opening / closing device 1 according to the present embodiment closes the opening 3, the housing 3 in which the opening 2 is formed, the shaft member 4 disposed in the opening 2 so as to form a horizontal predetermined axis L <b> 1, and the opening 2. A door body 5 disposed on the housing 3 and a shaft member 4 are mounted on the shaft member 4 so as to be rotatable about the predetermined axis L1 over a closed position and an open position where the opening 2 is opened. , A spring member 6 that is spring-biased in a closing direction that rotates from the open position toward the closed position, and a housing 3 that is provided with a braking force in a direction against the rotation in the closing direction. Braking means 7 for carrying out the operation.

  FIG. 3 is a front view of the opening / closing device 1 showing a state in which the opening 2 is closed by the door body 5, and FIG. 4 is an enlarged cross-sectional view of the opening / closing device 1 seen from the section line IV-IV in FIG. is there. 5A and 5B are enlarged perspective views of the spring member 6 and the vicinity thereof.

  The spring member 6 includes a first coil portion 8 and a second coil portion 9, which are a plurality of coil portions made of a metal wire wound through the shaft member 4 and wound in a cylindrical shape, and one end of each of the coil portions 8 and 9. The first and second arm portions 10 and 11 that are one arm portion that presses the door 3 in the closing direction, and the metal wire that extends from the other end of each of the coil portions 8 and 9. The other arm portions 12a and 12b supported by the three opening portions 2 are realized by torsion springs that are connected to each other.

  The first and second coil portions 8 and 9 are opposite to each other in the winding direction of the metal wire, and the other arm portion 12 is circumferential with respect to the first and second arm portions 10 and 11 that are one arm portion. Are configured to generate a spring force in the same direction with respect to a displacement close to and away from each other.

  Next, a procedure for attaching the spring member 6 will be described. As shown in FIG. 5A, the spring member 6 inserts the shaft member 4 into the coil portions 8 and 9 of the spring member 6, and both ends of the shaft member 4 to which the spring member 6 is attached in the direction of the axis L1 are the door body 5. And the respective arm portions 10 and 11 of the shaft member 6 are respectively hooked in the grooves 20 and 21 of the door body 5, and the other arm portion 12 is gripped with fingers and the respective coil portions 8 and 9. And is pressed against the locking projection 22 formed on the housing 3 to be locked. At this time, the other arm portion 12 is locked in a state where it is elastically contacted with the locking convex portion 22, whereby the door body 5 is spring-biased in a closing direction by the one arm portion 10, 11. The

  After the shaft member 4 is inserted through the coil portions 8 and 9 as described above, one of the arm portions 10 and 11 is hooked in the grooves 20 and 21 of the door body 5, and then the other arm portion 12. The spring member 6 can be easily attached by the operation of pushing the screw into the back side of the locking projection 22. Moreover, since the spring member 6 is formed of a so-called double portion spring having two coil portions 8 and 9, the diameter of each coil portion 8 and 9 is not increased with respect to the shaft member 4, and is made of a thin metal. Since large power can be obtained, the installation space for the spring member 6 can be small, and the shapes of the housing 3 and the door body 5 do not increase, and the configuration can be simplified and miniaturized.

  6A is a cross-sectional view showing a state of the spring member 6 when the door body 5 is arranged at the open position, and FIG. 6B is a cross-section showing a state of the spring member 6 when the door body 5 is arranged at the closed position. FIG. As shown in FIG. 6A, the spring member 6 is pressed in a direction in which one of the arm portions 10 and 11 approaches the other arm portion 12 by the door body 5 in a state where the door body 5 is disposed at the open position. Is done. In this state, when the operator releases his / her finger from the door body 5 which is spring-biased in the closing direction by the spring member 6, as shown in FIG. 6B, the door body 5 moves around the axis L1 in the closing direction. Rotate. At this time, the spring member 6 is compressed and generates a pressing force in the closing direction with respect to the door body 5.

  FIG. 7 is an enlarged cross-sectional view taken along the section line VII-VII in FIG. The braking means 7 includes a first gear 30 into which the shaft member 4 is inserted and fixed, and a second gear 31 that meshes with the first gear 30, and the rotation of the second gear 31 is viscous. And a damper portion 32 that decelerates by flow resistance caused by fluid.

  The braking means 7 is also called a rotary damper or a rotary damper, and a gear (not shown) is accommodated together with a viscous fluid such as silicon oil in a holder 33 where the second gear 31 of the damper portion 32 is provided. And the second gear 31 are coaxially connected and interlocked, the rotation from the second gear 31 is transmitted to the gear in the holder 33, and the rotation is suppressed by the flow resistance due to the viscous fluid against the gear in the holder 33, It is comprised so that the rotational speed of the 1st gearwheel 30 can be decelerated.

  Therefore, the door body 5 is spring-biased in the closing direction by the spring member 6. The rotation of the shaft member 4 that rotates in the same direction is decelerated by the rotation of the door member 5 in the closing direction by the spring member 6, and only the rotational speed is decelerated without reducing the rotational torque, and the door member 5 is slowly And can be reliably rotated from the open position to the closed position to close the door. Therefore, when the door body 5 reaches the closed position, the door body 5 gently contacts the opening 2 of the housing 3 and is prevented from generating an impact sound. Further, as described above, since the door body 5 slowly rotates from the open position to the closed position, the door body 5 will not be suddenly closed against the will of the operator. For example, magnetic card insertion / removal work or various button operations can be performed reliably, and erroneous operations such as the operator touching the door 5 at the wrong timing can be prevented, and the operability is excellent. Can be realized.

(Second Embodiment)
In the above-described embodiment, it has been described that the spring member 6 has the configuration including the two coil portions 8 and 9. However, in another embodiment of the present invention, the spring member 6 having three or more coil portions is used. You may do it. As a result, the metal wire constituting the spring member 6 can be made smaller in diameter and used as a torsion spring having a high torque.

(Third embodiment)
In each of the above-described embodiments, the configuration using the rotary damper or the rotary damper using the flow resistance caused by the viscous fluid as the braking means 7 has been described. However, in the other embodiments of the present invention, the rotation of the second gear 31 is transmitted. The structure which generate | occur | produces a braking force by the frictional resistance by pinching | interposing the rotary body in the holder 33 made | formed, such as a leaf | plate spring or corrosive cloth may be employ | adopted. Also by this, the same effect as the above-described braking means 7 can be obtained.

DESCRIPTION OF SYMBOLS 1 Opening / closing device 2 Opening part 3 Housing | casing 4 Shaft member 5 Door body 6 Spring member 7 Braking means 8, 9 Coil part 10, 11 One arm part 12; 12a, 12b The other arm part 30 1st gear 31 2nd gear 32 Damper 33 Holder L1 Axis

Claims (3)

A housing in which an opening is formed;
A shaft member disposed horizontally in the opening;
Arranged in the housing so as to be rotatable around the axis of the shaft member in a state of being hooked on the shaft member over a closed position for closing the opening and an open position for opening the opening. A door,
A spring member attached to the shaft member and biasing the door body in a closing direction rotating from an open position toward a closed position;
An opening / closing device comprising: a braking means provided on the housing and applying a braking force to the door body in a direction against the rotation in the closing direction. The spring member is
A plurality of coil parts made of a metal wire wound in a cylindrical shape, the coil part through which the shaft member is inserted; and
One arm part that consists of a metal wire extending from one end of each coil part and presses the door body in the closing direction;
2. The switchgear according to claim 1, further comprising: another arm portion made of a metal wire extending from the other end of each of the coil portions and supported by the opening of the housing. The braking means includes
A first gear that is inserted into and fixed to the shaft member;
3. The switchgear according to claim 1, further comprising: a second gear that meshes with the first gear, and a damper portion that decelerates the rotation of the second gear by a flow resistance caused by the viscous fluid.

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