JPH1061702A - Opening/closing damper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new opening/closing damper, having stability, which can obtain stable opening/closing and surely stop in an arbitrary position, in the case of opening/closing an opening/closing member. SOLUTION: A device comprises a cylindrical cylinder tube 1, columnar screw shaft 11 formed with a helical guide groove 11' and a spring clutch 21, in a rod side end of the cylinder tube 1, a rod side flange 3 inserting the screw shaft 11 guided is fitted to be secured and a head side flange 5 is fixedly fitted, in a head side of the screw shaft 11, a guide piston 18 and the spring clutch 21 are insertion supported. By float fitting a protrusion part 3' provided in the rod side flange 3 to the guide groove 11' of the screw shaft 11, it is guided, while rotated, to be arranged movably in an axial direction. The spring clutch 21 is constituted so as to apply small resistance in a rotational direction relating to the screw shaft 11 in a direction drawing it out so as to apply relatively large resistance relating to the screw shaft 11 in a direction retracting it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ordinary vertical opening / closing window, a cover of a trunk of a passenger car or portable office equipment,
The present invention relates to an opening / closing damper for controlling the opening / closing force of a lid member that opens and closes, such as a copy machine.

[0002]

2. Description of the Related Art Various types of opening / closing dampers for controlling the opening / closing force of a cover member for opening / closing, such as a normal opening / closing window, a cover of a trunk of a passenger car, portable office equipment, a copying machine, etc., are known. The opening / closing damper generates a constant torque by a leaf spring or a mainspring to maintain a weight balance, and operates slowly by oil and orifice control. There are oil dampers that use springs together and weight balance types.

[0003]

The prior art is as described above. However, in the case of the leaf spring and the mainspring type, the weight balance is a very important factor. However, there is a problem that it is difficult to stop reliably, and frictional force is not suitable for large ones, and oil-based ones are difficult to stop and lack stability. There is a problem.

In view of the above problems of the conventional damper, the present invention provides a novel opening / closing damper which can be opened / closed stably when opened / closed, can be stopped reliably at any position, and is stable. The purpose is to provide.

[0005]

To achieve the above object, the present invention comprises a cylindrical cylinder tube, a cylindrical screw shaft having a spiral guide groove, and a spring clutch. A rod-side flange that penetrates and guides the screw shaft is fitted and fixed to the rod-side end of the cylinder tube, and a head-side flange is fitted and fixed to the head-side end. The guide shaft and the spring clutch are supported through, and the protrusion provided in the rod side flange is loosely fitted in the guide groove of the screw shaft, so that the screw shaft is guided and rotates in the axial direction. It is movably arranged, and in the direction in which the screw shaft is pulled out, a small resistance is applied to the screw shaft in the rotation direction,
The spring clutch is characterized in that a relatively large resistance is applied to the screw shaft in the retraction direction of the screw shaft. It is also possible to have a function opposite to this function or a function that generates a relatively large resistance in any direction.

The spring clutch comprises a one-way boss and a limiter pipe. The limiter pipe has a central rotating portion having the same diameter as the one-way boss and a diameter larger than the central rotating portion. The outer cylindrical portion positioned on the outside is integrally formed, and the one-way boss, the limiter pipe, and the center rotating portion having the same diameter as the one-way boss are connected to each other, and the one-way boss and the center rotating portion of the limiter pipe are connected. The one-way spring and the limiter spring are wound around the outer cylindrical part of the limiter pipe.The direction of winding of the one-way spring and the limiter spring is reversed to transmit torque for rotation in the winding direction and for rotation in the loose direction. In order not to transmit torque.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments with reference to the drawings. The opening / closing damper of the present invention includes a cylinder tube 1, a screw shaft 11, and a spring clutch 21. In the figure, reference numeral 1 denotes a cylinder tube. The cylinder tube 1 is cylindrical. A rod-side flange 3 is fitted and fixed to a rod-side end of the cylinder tube 1, that is, a side end on which a screw shaft 11 described later moves in the axial direction. The rod-side flange 3 has a role of guiding a screw shaft 11 described later. In the present invention, in order to guide the screw shaft 11 by a guide groove 11 ′ formed in a spiral shape on the side surface of the screw shaft portion 12 of the screw shaft 11, Protrusion 3 ′ inside rod side flange 3
Is provided. At this time, since there is a possibility that dust may enter the cylinder tube 1, the rod side flange 3
A dust seal 2 is attached to the upper end of the.

At the end of the cylinder tube 1 on the head side,
The head side flange 5 is fitted and fixed. At the lower end of the head-side flange 5, a connecting portion 5 'for connecting to a fixed side (not shown) of an opening / closing member such as a window for opening and closing in the vertical direction, a cover of a trunk of a passenger car or portable office equipment, etc. is provided. The head side flange 5 is a screw shaft 11
When the vehicle is heavy, such as a trunk cover of a passenger car, the impact is large and the head side flange 5 or the fixed side of the opening / closing member may be damaged. 5, a hole is provided in the cylinder tube 1 side, and a cushion rubber 4 is inserted into the hole.

In the figure, reference numeral 11 denotes a screw shaft. The screw shaft 11 has a cylindrical shape, and a spiral guide groove 11 ′ is formed on a side surface of the screw shaft portion 12. The guide groove 11 ′ is formed such that a one-way spring 23 of a spring clutch 21 described later is in a loosening direction when an opening / closing lid (not shown) is opened. A clevis 15 for connecting to a cover of a trunk of a passenger car or an opening / closing lid of an opening / closing member of a portable office device or the like is provided on the rod side of the screw shaft 11.
In order to connect the screw shaft 11 and the clevis 15, the upper part is fitted into a hole provided at the lower end of the clevis 15 in a clevis connecting part 13 formed in a cylindrical shape having a smaller diameter than the screw shaft part 12. I can do it. Further, in order to prevent the screw shaft 12 and the clevis 15 from separating, the E-ring 16 is penetrated and fixed to the clevis connecting portion 13 immediately above the hole provided at the lower end of the clevis 15. At this time, the screw shaft 11 must be rotatable.
Since the E-ring 16 can be easily fitted into the E-ring 16 as long as the E-ring 5 is connected, it is possible to use another type of ring or caulking.

The head side of the screw shaft 11 also has a clutch connecting portion 14 formed in a columnar shape smaller than the screw shaft portion 12 like the rod side, and the spring connecting portion 14 and the later-described spring clutch 21 and the screw shaft 11 are connected to the clutch connecting portion 14. The guide piston 18 provided for the piercing is penetrated. Further, a portion of the one-way boss 22 of the spring clutch 21 to be described later is formed to have a D-shaped cross section. Further, in order to prevent the screw shaft 11, the guide piston 18 and the spring clutch 21 from separating from each other, the E-ring 17 is penetrated and fixed to the clutch connecting portion 14 immediately below the spring clutch 21. Like the E-ring 16, the E-ring 17 may be another type of ring or caulking.

In the figure, reference numeral 21 denotes a spring clutch. The spring clutch 21 uses a one-way spring 23 having a small wire diameter on the inside and a limiter spring 25A having a large wire diameter on the outside.
And a limiter pipe 24. One way boss 2
Numeral 2 is cylindrical and has an inner diameter of D-shape, and the clutch connecting portion 14 is as described above. Therefore, the clutch connecting portion 14 is engaged with the clutch connecting portion 14 of the screw shaft 11 and is integrated. In addition, the limiter pipe 24 has a central rotating portion 26 having the same diameter as the one-way boss 22 and a central rotating portion 26.
It has a larger diameter, and is formed integrally with an outer cylindrical portion 27 positioned outside the center rotating portion 26.

The one-way boss 22 and the limiter pipe 24 having the same diameter as the one-way boss 22 are connected to each other so that the one-way boss 22 and the limiter pipe 24 are connected to each other.
A one-way spring 23 is wound around the center rotating portion 26 as an inner tightening spring.
A limiter spring 25A is wound around the outer cylindrical portion 27 of the fourth member as an outer wrap spring. In addition, the winding directions of the inner and outer compression springs are configured to be opposite.

In FIGS. 1 and 2, a limiter spring 25A is used in which the wire is a round wire having a circular cross section and the inner diameter is formed to be smooth. However, the wire as shown in FIG. Limiter spring 25 as a wire rod
B or the limiter spring 25C in which the wire as shown in FIG. 4 is a round wire having a circular cross section may be used.

The operation will be described with reference to FIGS.
First, the operation of opening the cover of the trunk of the passenger car or the opening / closing lid of the opening / closing member of the portable office equipment will be described. When the lid is raised, the clevis 15 connected to the lid is pulled, and the screw shaft 11 moves in the axial direction by the guide of the rod-side flange 3. At this time, a spiral guide groove 11 ′ is formed on the side surface of the screw shaft 11,
The protrusion 3 'provided on the rod side flange 3 is a guide groove 11'.
Therefore, when the screw shaft 11 moves in the axial direction, the screw shaft 11 moves while rotating according to the guide groove 11 ′.

Next, the operation of the spring clutch 21 will be described. As described above, the direction in which the screw shaft 11 rotates when the opening / closing lid is opened is the same as the direction in which the one-way spring 23 is loosened. Therefore, when the screw shaft 11 rotates, the one-way spring 23 rotates in the loosening direction. The one-way boss 22 rotates because the one-way boss 22 is engaged with the screw shaft 11, but due to the loosening of the one-way spring 23, idling torque acts on the one-way spring 23, and the one-way boss 22 and the limiter pipe 24 are not connected to each other. The limiter pipe 24 does not rotate. Further, since the one-way spring 23 and the limiter spring 25 have opposite winding directions, when the screw shaft 11 rotates as described above, the rotation can be stopped at an arbitrary position. By these actions, the opening / closing lid can be opened with a small force, and the unit can receive the weight and can operate the opening / closing side with a small force.

Next, the operation when the opening / closing lid is closed will be described. When the lid is lowered, the clevis 15 connected thereto is pushed, and the screw shaft 11 moves in the axial direction by the guide of the rod-side flange 3. At this time, a spiral guide groove 11 ′ is formed on the side surface of the screw shaft 11, and the screw shaft 11 rotates along the guide groove 11 ′ when the screw shaft 11 moves in the axial direction by the protrusion 3 ′ of the rod-side flange 3. Moving.

The operation of the spring clutch 21 when closing will be described. As described above, the direction in which the screw shaft 11 rotates when the opening / closing lid is opened is the same as the direction in which the one-way spring 23 is loosened.
The one-way spring 23 rotates in the tightening direction.
When the one-way spring 23 tightens the one-way boss 22 and the center rotating portion 26 of the limiter pipe 24, the one-way boss 22 and the limiter pipe 24 rotate in the same direction. On the other hand, since the winding directions of the one-way spring 23 and the limiter spring 25A are opposite,
As described above, when the screw shaft 11 rotates, the limiter spring 25A acts in the loosening direction, and the limiter spring 25A and the outer cylindrical portion 2 of the limiter pipe 24.
7, the one-way boss 22 that rotates integrally with the limiter pipe 24 rotates with resistance, so that the rotation can be stopped at an arbitrary position. By such an operation, the opening / closing lid can be stopped at an arbitrary position with resistance, and can be closed with a light force.

[0018]

Since the present invention is configured as described above, it has the following effects. The opening / closing damper of the present invention has a spiral guide groove formed on the side surface of the screw shaft portion of the screw shaft, and is guided by a projection provided in the cylinder of the rod-side flange provided at the rod-side end of the cylinder tube, The screw shaft can rotate while moving in the axial direction, thereby rotating the spring clutch. Further, the spring clutch used in the present invention uses a one-way spring and a limiter spring. Thus, there is no resistance in the opening direction of the opening / closing lid, so that the opening / closing lid is lightened, and in the closing direction, resistance is applied and the weight increases. Therefore, the opening / closing lid can be easily opened, and the opening / closing lid can be operated stably. Further, due to the feature of the spring clutch, the window, the cover, the opening / closing lid and the like can be reliably stopped at an arbitrary position. It is also possible to provide a balance method by inserting a spring that works in the direction in which the screw shaft comes out.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a closed state of an opening / closing damper of the present invention.

FIG. 2 is a front sectional view of a state where an opening / closing damper is opened.

FIG. 3 is a front view in which a part of an opening / closing damper in which a wire material of a spring coil is a square wire having a rectangular cross section is shown in section.

FIG. 4 is a front view showing a cross section of a part of an opening / closing damper in which a wire material of a spring coil is a round wire having a circular cross section.

FIG. 5 is an exploded perspective view of the opening / closing damper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder tube 2 Dust seal 3 Rod side flange 3 'Projection part 4 Cushion rubber 5 Head side flange 11 Screw shaft 11' Guide groove 12 Screw shaft part 13 Clevis connection part 14 Clutch connection part 15 Clevis 16, 17 E-ring 18 Guide piston 21 Spring clutch 22 One-way boss 23 One-way spring 24 Limiter pipe 25A, 25B, 25C Limiter spring 26 Center rotating part 27 Outer cylindrical part

Claims (5)

[Claims] 1. A cylinder cylinder, a cylindrical screw shaft having a spiral guide groove formed thereon, and a spring clutch. The rod end of the cylinder tube penetrates the screw shaft. A rod-side flange to be guided is fitted and fixed, a head-side flange is fitted and fixed to the head-side end, and a guide piston and a spring clutch are passed through and supported on the head side of the screw shaft. The projection provided in the rod-side flange is loosely fitted in the guide groove of the shaft, so that the screw shaft is guided and is arranged so as to be axially movable while rotating, and in the direction in which the screw shaft is pulled out. , A small resistance is applied to the screw shaft in the rotation direction,
An opening / closing damper, wherein the spring clutch is configured so that a relatively large resistance is applied to the screw shaft in the retraction direction of the screw shaft. 2. The spring clutch comprises a one-way boss and a limiter pipe. The limiter pipe has a central rotating portion having the same diameter as the one-way boss and a diameter larger than the central rotating portion. The one-way boss, the limiter pipe and the above-mentioned center rotation part having the same diameter are connected to each other, and the one-way boss and the center rotation part of the limiter pipe are integrally connected. And a limiter spring around the outer cylindrical part of the limiter pipe.The direction of rotation of the one-way spring and the limiter spring is reversed, and torque is transmitted for rotation in the winding direction. 2. The opening / closing damper according to claim 1, wherein the opening / closing damper is configured not to transmit torque. 3. The opening / closing damper according to claim 1, wherein a wire of the limiter spring is a round wire having a circular cross section and has a smooth inner diameter. 4. The opening / closing damper according to claim 1, wherein the wire is a square wire having a square cross section. 5. The opening / closing damper according to claim 1, wherein the wire is a round wire having a circular cross section.