JP2015017490A - Power device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power device capable of turning down a sound generated during operations without a reduction in the quantity of grease and the like or use of the grease and the like.SOLUTION: An elastic member is provided between a spiral spring having an inside end provided on a central axis, and a plate-like member provided on an end surface of a cylindrical member provided with an outside end of the spiral spring. A force in a direction orthogonal to the plate-like member is urged to the spiral spring by the elastic member. In this case, the elastic member is formed in a size large enough to be capable of covering most of the end surface of the spiral spring.

Description

  The present invention relates to a power plant.

  Patent Document 1 discloses a closing device for a sliding door in which a resistance fluid such as grease is sealed in a rotating drum in which a mainspring is provided.

Japanese Utility Model Publication No. 63-81179

  The invention described in Patent Literature 1 can reduce the operation sound in addition to the effect that the sliding door is slowly closed by the grease. However, in the invention described in Patent Document 1, there is a possibility that grease leaks out of the rotating drum. For example, when this closing device for a sliding door is used in a facility such as a hospital or a nursing care facility, if the grease leaks to the outside, there is a possibility that it becomes a sanitary problem.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a power unit capable of reducing the operation sound without reducing the amount of grease or the like or using the grease or the like.

  In order to solve the above-described problem, a power device according to the present invention includes, for example, a spiral spring, a central axis provided with an inner end of the spiral spring, the spiral spring provided therein, and the spiral provided on an inner periphery. A cylindrical member provided with an outer end of a spring; a plate-like member provided on an end surface of the cylindrical member; a winding unit that rotates the cylindrical member or the central axis to wind up the spiral spring; An elastic member that is provided between the spiral spring and the plate-like member and biases the spiral spring with a force in a direction perpendicular to the surface of the plate-like member, and has a large end face of the spiral spring. And an elastic member formed in a size capable of covering the portion.

  According to the power unit of the present invention, the elastic member is provided between the spiral spring and the plate-like members provided at both ends of the cylindrical member, and the direction perpendicular to the surface of the plate-like member is provided on the spiral spring. The power of is energized. Therefore, it is possible to reduce the sound generated during operation without reducing the amount of grease or the like or using grease or the like.

  Here, the elastic member may be formed by bending a plate material at a plurality of locations. Thereby, an elastic member can be easily produced with an inexpensive material.

  Here, the elastic member may be formed of a resin capable of elastic deformation. Thereby, an elastic member can be made into a simple shape.

  Here, the elastic member may be formed of metal. Thereby, an elastic force can be maintained over a long period of time.

  Here, at least a portion of the elastic member that is in contact with the spiral spring may be formed of a resin whose frictional force with the end surface of the spiral spring is smaller than the frictional force between the end surface of the spiral spring and the plate member. Good. Thereby, generation | occurrence | production of the rubbing sound which generate | occur | produces when the end surface of a spiral spring rubs a board can be reduced.

  Here, the plate material may be formed of a resin whose frictional force with the end surface of the spiral spring is smaller than the frictional force between the end surface of the spiral spring and the plate-like member. Thereby, generation | occurrence | production of the rubbing sound which generate | occur | produces when the end surface of a spiral spring rubs a board can be reduced.

  According to the present invention, it is possible to reduce the operation sound without reducing the amount of grease or the like or using the grease or the like.

It is a figure which shows the detail of the power plant 1 which is an example of this invention, (A) is a top view, (B) is a side view. 1 is a cross-sectional view of a power unit 1. FIG. It is a figure which shows the detail of an elastic member, (A) is a top view, (B) is a side view. It is a figure which shows the modification of the power plant. It is a figure which shows the modification of the power plant 1, (A) shows power plant 1A, (B) shows power plant 1B, (C) shows power plant 1C. It is a figure showing power unit 1D which is a modification of power unit.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing details of a power unit 1 that is an example of the present invention, in which (A) is a plan view and (B) is a side view. For description of the internal structure, the side wall 15 of the power unit 1 is removed in FIG.

  The power unit 1 mainly includes a case 10, a mainspring 20, a wave sheet 30 (elastic member), and a wire 40. One end of the wire 40 is connected to a mating part such as a sliding door, window, or tool (not shown), and the mating part is connected to the case 10 via the wire 40.

  The case 10 mainly includes a case main body 11, a mainspring fixing portion 12, a drum portion 13, a side wall 15, and a central shaft 19.

  As shown in FIG. 1A, the case main body 11 is formed in a hollow cylindrical shape, and a mainspring 20 is provided therein. In the present embodiment, the case main body 11 is formed in a round tube shape, but may be formed in another tube shape such as a square tube.

  As shown in FIG. 1B, a drum portion 13 around which the wire 40 is wound is formed on the outer periphery of the case main body 11. Side walls 15 are provided at both ends of the case body 11. In the present embodiment, the case main body 11 is formed in a hollow cylindrical shape, and the side walls 15 are fixed to both ends of the case main body 11, whereby the side walls 15 are provided at both ends of the case main body 11. The side wall 15 is fixed to only one end of the case body 11, and the other end of the case body 11 is integrally formed with a plate-like member corresponding to the side wall and the case body 11 (tubular portion). You may provide the side wall 15 in the edge. That is, the case main body 11 and the side wall 15 may be formed by combining different parts, or may be formed by one part.

  Further, in the present embodiment, the end of the case body 11 is entirely covered with the side wall 15 that is a plate-like member, but the end of the case body 11 does not have to be completely covered. For example, a plate-like member or the like that is partly mesh-shaped may be provided at the end of the case body 11, and the inside of the case body 11 may be partially exposed.

  As shown in FIG. 1A, a mainspring fixing portion 12 provided with an outer end of the mainspring 20 is formed on the inner periphery of the case main body 11. In the present embodiment, the outer end of the mainspring 20 is fixed to the mainspring fixing portion 12, but the method of providing the outer end of the mainspring 20 on the case main body 11 is not limited to this. For example, the outer end of the mainspring 20 may be provided on the case main body 11 such that the outer end of the mainspring 20 is pressed against the inner periphery of the case main body 11 by the elastic force of the mainspring 20 itself.

  The mainspring 20 is a contact-type spiral spring, and is formed by, for example, winding a plate-shaped metal or the like in a spiral shape in the surface direction. The mainspring 20 generates a force in the rotation direction and is a power source of the power unit 1.

  In the present embodiment, the mainspring 20 is formed using a metal plate-like member, but the material is not limited to metal, and the shape is not limited to a plate-like member. For example, the mainspring 20 may be formed of resin, or the mainspring 20 may be formed of a wire.

  The inner end of the mainspring 20 is provided on the central shaft 19. The central shaft 19 is fixed to a part (not shown) such as a wall. The case main body 11 is provided so as to be rotatable with respect to the central shaft 19 via the mainspring 20.

  When the wire 40 is pulled leftward in FIG. 1A by pulling the sliding door (see the white solid arrow in FIG. 1A), the case body 11 is counterclockwise in FIG. 1A. The mainspring 20 is wound up by rotating around (see the solid line arrow in FIG. 1A). When the external force applied to the wire 40 is removed, the mainspring 20 is rewound, so that the case main body 11 rotates clockwise in FIG. 1A (see the broken arrow in FIG. 1A). Then, the wire 40 is wound around the drum portion 13 (see the white broken arrow in FIG. 1A).

  When the mainspring 20 is wound up or unwound, the mainspring 20 moves in a direction parallel to the axis of the central shaft 19, that is, in the z direction (see FIG. 1B). In the present embodiment, the mainspring 20 moves in the z-direction and the end face of the mainspring 20 strikes the side wall 15 vigorously. In order to prevent rubbing noise caused by sliding, a wave sheet 30 is inserted between the end face of the mainspring 20 and the side wall 15 as shown in the cross-sectional views of FIG.

  FIG. 3 is a diagram showing details of the wave sheet 30, (A) is a plan view, and (B) is a side view.

  The wave sheet 30 is formed by bending a circular plate of a resin (for example, polyacetal resin (POM)) having excellent sliding characteristics at a plurality of locations. Here, the resin having excellent sliding characteristics is, for example, a resin in which the frictional force between the wave sheet 30 formed of the resin and the end surface of the mainspring 20 is smaller than the frictional force between the end surface of the mainspring 20 and the side wall 15. is there. As shown in FIG. 3A, the wave sheet 30 is formed by folding a circular plate material with four fold lines 30a. In addition, a hole 30 b through which the central axis 19 passes is formed at the center of the wave sheet 30.

  Thereby, the wave sheet 30 that can be deformed in the thickness direction (the axial direction of the hole 30b, see FIG. 3B) is formed. In the present embodiment, the wave sheet 30 is formed by folding a circular plate material with four folding lines 30a. However, the method of bending the wave sheet 30 is not limited to this.

As shown in FIG. 2, the wave sheet 30 is inserted into the case main body 11 so that the central axis 19 penetrates the hole 30 b. The thickness t ₁ (see FIG. 3) of the wave sheet 30 is thicker than the gap t ₂ (see FIG. 2) between the end face of the mainspring 20 and the side wall 15. Accordingly, in the wave sheet 30, the hole 30 b comes into contact with the side wall 15, and the outer periphery 30 c and the surface 30 d come into contact with the mainspring 20 in a state where the power unit 1 is assembled. Thereby, there is no gap in the z direction inside the case 10. In addition, the insertion direction of the wave sheet 30 into the case main body 11 may be reversed (in this case, the outer periphery 30c and the surface 30d are in contact with the side wall 15).

  When the mainspring 20 is wound or unwound, the mainspring 20 tends to move in the z direction (see FIG. 2). For example, when the outer periphery 30c is pushed upward (+ z direction), the spring 20 is urged by the elastic force of the wave sheet 30 to be pushed downward (−z direction). As a result, the movement of the mainspring 20 in the z direction is restricted, and vibrations of the mainspring 20 and the side wall 15 generated when the end surface of the mainspring 20 strikes the side wall 15 vigorously, and a collision sound between the end surface of the mainspring 20 and the side wall 15 are generated. Can be prevented.

  The mainspring 20 moves in the radial direction (x direction, y direction) when being wound up or unwound. Therefore, in order to effectively prevent a collision sound or the like, it is desirable to form the wave sheet 30 with a size that can cover most of the end face of the mainspring 20. Further, by forming the wave sheet 30 with a size that can cover most of the end face of the mainspring 20, it is possible to increase the elastic force with which the wave sheet 30 can be biased.

  The mainspring 20 is constantly biased by the wave sheet 30 so as to be pushed downward (−z direction). Therefore, the mainspring 20 and the lower side wall 15 are always in contact with each other, and no collision noise is generated.

  When the mainspring 20 is wound up or unwound in the absence of the wave sheet 30, the end face of the mainspring 20 rubs against the side wall 15 after the end face of the mainspring 20 rubs against the side wall 15, and a rubbing sound is generated. Will occur. On the other hand, when the wave sheet 30 is provided, the contact portion between the wave sheet 30 and the mainspring 20 is small, so that the generation of rubbing noise can be reduced.

  According to the present embodiment, by inserting an elastic member between the end face and the side wall of the mainspring, it is possible to reduce the sound generated during operation without reducing the amount of grease or the like or using grease. In addition, since the wave sheet can be formed simply by bending the plate material at a plurality of locations, the elastic member can be easily produced with an inexpensive material.

  When an elastic member is not inserted between the end face and the side wall of the mainspring, the end face of the mainspring collides with one side wall (sidewall 1) and a collision noise is generated, and the end face of the mainspring is rubbed with the side wall 1 and a rubbing sound is generated. An operation sound is generated by repeatedly generating a collision sound when the end face of the mainspring hits the other side wall (sidewall 2) and a rubbing sound by rubbing the end face of the mainspring with the side wall 2. On the other hand, in this embodiment, an impact member generated when the end face and the side wall of the mainspring collide with each other by inserting an elastic member (in this embodiment, the wave sheet 30) between the end face and the side wall of the mainspring. Can be suppressed.

  Further, in the present embodiment, by forming the wave sheet with a resin having excellent sliding characteristics such as POM, the frictional force between the end face of the mainspring and the wave sheet is smaller than the frictional force between the mainspring and the side wall. Sliding between the mainspring and the wave sheet is improved, and the generation of rubbing noise can be effectively suppressed.

  Further, in the present embodiment, by using a wave sheet formed by bending a plate material at a plurality of locations as the elastic member, it is possible to reduce the contact portion between the wave sheet and the whole while maintaining the elastic force. it can. Thereby, generation | occurrence | production of a collision sound and a rubbing sound can be suppressed effectively.

  In the present embodiment, the mainspring 20 that is a contact spiral spring is used as the power source of the power unit 1, but the power source of the power unit 1 is not limited to the mainspring. The power source of the power unit 1 may be a spiral spring, and various types of spiral springs such as a non-contact spiral spring can be used. As a material forming the spiral spring, various materials that can be elastically deformed such as metal and resin can be used. In addition, the spiral spring may be formed by using a strip-shaped wire, or by using a wire having a circular or elliptical cross section. In addition, a spiral spring is not limited to the case where it forms only with the material which can be elastically deformed. The spiral spring referred to in the present invention is a concept that includes a wire formed of a material that cannot be elastically deformed and a wire formed of a material that can be elastically deformed.

  Further, in the present embodiment, only one wave sheet 30 is put in the case main body 11, but as shown in FIG. 4, two wave sheets 30 in total, one on each end of the mainspring 20, are placed on the case main body. 11 may be included. Further, a member for improving lubrication, such as an unbent wave sheet, may be inserted between the end face of the mainspring 20 on the side where the wave sheet 30 is not inserted and the side wall 15.

  In this embodiment, in order to reduce the frictional force between the mainspring 20 and the wave sheet 30, the wave sheet 30 is formed of a resin having excellent sliding characteristics (for example, polyacetal resin (POM)). It is not essential that the material forming the 30 has excellent sliding performance. For example, resins such as polyethylene (PE), engineering plastics (for example, PEEK) that are excellent in spring elasticity, and metals (particularly iron-based materials) with excellent wear resistance (for example, ultra-high The wave sheet 30 can also be formed using a metal plate material such as molecular weight polyethylene) or stainless steel. Even when the wave sheet 30 has poor sliding characteristics, an elastic member such as the wave sheet 30 is inserted between the end face and the side wall of the mainspring so that the end face and the side wall of the mainspring collide with each other. The effect which suppresses the hitting sound can be acquired.

  In particular, when the wave sheet 30 is formed of metal, the elastic force can be maintained over a long period of time as compared with the case of the resin. In this case, for example, when the mainspring 20 is formed using an iron-based material, at least one of a metal having a higher hardness than the iron-based material (for example, an alloy containing tungsten, chromium, or the like), graphite, gold, or lead. It is desirable to form the wave sheet 30 using an alloy having excellent lubrication characteristics for an iron-based material containing one.

  The collision sound generated when the end face and the side wall of the mainspring 20 collide occupies about 80 to 90% of the operation sound generated by the power unit, so that a sufficient effect can be obtained even by suppressing only the collision noise. However, in order to reduce not only the hitting sound but also the rubbing noise between the mainspring and the elastic member (including the wave sheet 30, the cushion material 31, the wave washer 32, the coil spring 33, etc. The same shall apply hereinafter) It is desirable to form at least a portion in contact with the mainspring 20 with a resin having excellent sliding characteristics. Of course, you may form the whole elastic member with resin excellent in the sliding characteristic.

  Examples of the resin having excellent sliding characteristics include, for example, a resin having excellent sliding characteristics with respect to metals (particularly iron-based materials), such as POM, fluororesin (for example, polytetrafluoroethylene), and silicon resin (for example, silicon). Resin), an oil-impregnated resin obtained by impregnating a resin with oil, and the like can be employed. The resin having excellent sliding characteristics includes a polymer alloy obtained by mixing these resins having excellent sliding characteristics with other resins.

  Further, forming at least a portion of the elastic member that contacts the mainspring 20 with a resin having excellent sliding characteristics means that the surface of the elastic member is coated with a resin having excellent sliding characteristics between the elastic member and the mainspring 20. This is a concept that includes inserting a sheet formed of a resin having excellent sliding characteristics into the sheet, integrally molding an elastic member and a resin having excellent sliding characteristics by two-color molding, composite molding, pressing, or the like.

  In the present embodiment, the wave sheet 30 is formed by bending a circular plate, but the plate to be bent is not limited to a circle. Further, the wave sheet 30 is formed by bending a plate material at four places, but the number of places where the plate material is bent is not limited to four. Moreover, the method of manufacturing the wave sheet is not limited to the method of bending the plate material. For example, the wave sheet may be formed by curving a plate material. There may be one or more curved surfaces of the wave sheet formed by bending the plate material.

  Moreover, in this Embodiment, although the wave sheet 30 which bent the board | plate material was used as an elastic member which urges | biases the force of az direction to the mainspring 20, an elastic member is not restricted to this. For example, as shown in FIG. 5A, a plate-shaped cushion material 31 may be used as the elastic member. In this case, the cushion material 31 can be made into a simple shape. As the cushion material 31, an elastically deformable resin, sponge, or the like can be used. As the resin that can be elastically deformed, for example, a foamed resin (foamed polyethylene, foamed silicon, or the like) in which air is finely dispersed in the resin and molded into a foamed or porous shape, rubber, or the like can be used.

  As an elastic member, a wave washer 32 may be used as shown in FIG. 5 (B), or a coil spring 33 may be used as shown in FIG. 5 (C). An air spring may be used as the elastic member.

  Further, in the present embodiment, the wave sheet 30 is inserted between the end face of the mainspring 20 and the side wall 15, but the form in which the elastic member is provided between the mainspring 20 and the side wall 15 is not limited thereto. For example, as shown in FIG. 6, a plurality of protrusions 34 (corresponding to elastic members) having cavities inside may be integrally formed on the side wall 15A. Further, for example, the side wall 15 and the wave sheet 30 may be integrated by bonding or the like. Thus, the side wall and the elastic member may be separate parts or a single part. When the side wall and the elastic member are one part, the side wall and the elastic member may be formed as one part, or different parts may be formed as one part by bonding or the like.

  Moreover, in this Embodiment, although the wire 40 was used as a winding part which winds up the mainspring 20, a rope, a band, a chain, a string, etc. may be used. Further, in the present embodiment, the mainspring 20 is wound up by rotating the case main body 11 using the wire 40, but even if the mainspring 20 is wound up by rotating the case main body 11 without using the wire 40. Good. Further, the mainspring 20 may be wound up by rotating the central shaft 19 without rotating the case main body 11. For example, the case main body 11 may be fixed, the wire 40 may be wound around a pulley fixed to the central shaft 19, and the central shaft 19 may be rotated by pulling the wire 40. Further, for example, the central shaft 19 may be rotated by fixing the case main body 11 and rotating a gear, a cam or the like fixed to the central shaft 19.

  Further, in the present embodiment, the mainspring 20 has a constant width (z direction), but the mainspring width can be arbitrarily changed. For example, when the wave sheet 30 is used as the elastic member, a mainspring is used in which the width of the outer portion (portion close to the case body 11) that contacts the wave sheet 30 is thicker than the inner portion (portion close to the central axis 19). May be. Moreover, when using the coil spring 33 as an elastic member, you may use a mainspring whose width | variety of the inner part contact | abutted with the coil spring 33 is thicker than an outer part. In this way, the occurrence of a bumping sound can be effectively suppressed by narrowing the width of the portion other than the portion that contacts the elastic member of the mainspring so as not to contact the elastic member. Moreover, since the width of the mainspring can be changed arbitrarily, it can be applied to any shape of elastic member.

  Furthermore, the contact area between the mainspring and the elastic member can be reduced by arbitrarily changing the width of the mainspring. By reducing the contact area between the mainspring and the elastic member, it is possible to effectively suppress rubbing noise even when at least a portion of the elastic member that contacts the mainspring 20 is not formed of a resin having excellent sliding characteristics. Further, when at least a portion of the elastic member that contacts the mainspring 20 is formed of a resin having excellent sliding characteristics, it is possible to more effectively suppress the rubbing sound.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes and the like within a scope not departing from the gist of the present invention are included. .

1, 1 ', 1A, 1B, 1C, 1D: Power unit, 10: Case, 11: Case body, 12: Fixed part, 13: Drum part, 15: Side wall, 19: Center shaft, 20: Mainspring, 30: Wave sheet, 30a: fold line, 30b: hole, 30c: outer periphery, 30d: surface, 31: cushion material, 32: wave washer, 33: coil spring, 40: wire

In order to solve the above-described problem, a power device according to the present invention includes, for example, a spiral spring, a central axis provided with an inner end of the spiral spring, the spiral spring provided therein, and the spiral provided on an inner periphery. A cylindrical member provided with an outer end of a spring; a plate-like member provided on an end surface of the cylindrical member; a winding unit that rotates the cylindrical member or the central axis to wind up the spiral spring; An elastic member that is provided between the spiral spring and the plate-like member and biases the spiral spring with a force in a direction perpendicular to the surface of the plate-like member, and has a large end face of the spiral spring. An elastic member formed with a size capable of covering a portion, and the thickness of the elastic member when the elastic member is not provided between the spiral spring and the plate-like member is The internal height of the tubular member, Wherein the thicker than the difference between the height of the serial spiral spring.

Claims (6)

A spiral spring,
A central axis provided with an inner end of the spiral spring;
A cylindrical member in which the spiral spring is provided and an outer end of the spiral spring is provided on the inner periphery;
A plate-like member provided on an end surface of the tubular member;
A winding part for rotating the cylindrical member or the central axis to wind up the spiral spring;
An elastic member that is provided between the spiral spring and the plate-like member and biases the spiral spring with a force in a direction perpendicular to the surface of the plate-like member. An elastic member formed in a size capable of covering the majority,
A power device comprising: The power plant according to claim 1,
The elastic member is formed by bending a plate material at a plurality of locations. The power plant according to claim 1,
The power unit is characterized in that the elastic member is formed of a resin that can be elastically deformed. The power plant according to claim 1 or 2,
The elastic member is made of metal. The power plant according to any one of claims 2 to 4,
At least a portion of the elastic member that contacts the spiral spring is formed of a resin whose frictional force with the end surface of the spiral spring is smaller than the frictional force between the end surface of the spiral spring and the plate-like member. Power unit to do. The power plant according to claim 2, wherein
The power unit according to claim 1, wherein the plate member is made of a resin whose frictional force with the end surface of the spiral spring is smaller than the frictional force between the end surface of the spiral spring and the plate-like member.

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