JP2010185174A - Spring-assisted stay for canopy - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spring-assisted stay which greatly exerts a reduction effect in mounting space, and which has a high degree of freedom in setting of an opening angle. <P>SOLUTION: This spring-assisted stay includes: a cylinder which has a base end pivoted on a fixed-frame body by a fixed-side bracket; a piston rod which can advance/recede in the axial direction of the cylinder, and which has a leading end pivoted on a canopy by a movable-side bracket; a piston which is fixed to an intermediate portion of the piston rod; a shock absorber which is housed and fixed in the base end-side portion of the cylinder, and whose input rod advance/recede in the axial direction of the cylinder; and a coiled spring which is fitted with the piston rod and housed in the cylinder, and compressed between a leading end of a fixed body of the shock absorber and a base end of the piston. The spring-assisted stay is arranged in such a manner that the base end of the piston rod abuts on the leading end of the input rod when the canopy makes an entry into a terminal end area of closing rotation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a canopy spring-assisted stay that incorporates a spring for assisting when the canopy is opened.

There are two types of stays: a side-opening type for doors that opens and closes around a vertical hinge axis, and a top-opening type for canopies that opens and closes around a horizontal hinge axis. Are completely different, so they are used as dedicated products.

In order to reduce the burden on the operator when lifting and opening the canopy by hand, the canopy stay urges the movable rod in the protruding direction by a compression coil spring, and the downward rotating force and spring There is a spring-assisted stay that counteracts the upward rotational force caused by the repulsive force.

In this spring-assisted stay, when the canopy is closed, the compression coil spring is compressed as the canopy is closed, but the repulsive force of the spring generated by this compression load is applied to counter the canopy weight. Therefore, the spring hardly works in the direction of suppressing the closing speed of the canopy.

Thus, even if the spring-assisted stay for the canopy has a built-in spring, it does not have a buffering function as such, so it is desirable to decelerate and buffer the canopy at the end of the closed rotation of the canopy. In this case, it is necessary to attach a dedicated shock absorber between the canopy and the fixed frame.

In general, in the spring-assisted stay, the positional relationship of the canopy opening / closing fulcrum (hinge axis) with respect to the stay mounting position, that is, the fulcrum position is an important point in determining the opening angle of the canopy. When the spring assist stay and the shock absorber are mounted separately, there may be restrictions in setting the fulcrum position.

In order to avoid such a restriction at the time of mounting, an integrated type of stay and shock absorber has been proposed (see Patent Document 1), but in this integrated product, the stay arm is folded in two. In the stay, a disk type oil damper unit is connected to the base end of one arm.

Although such an integration has an effect of reducing the occupied space as it is, the disk-type oil damper is an externally attached type, so there is a certain limit to the space saving effect.

JP 2001-254565 A

An object of the present invention is to provide a spring-assisted stay that has a large effect of reducing a mounting space and has a large degree of freedom in setting an opening angle.

The spring-assisted stay of the present invention has a cylinder whose base end is pivotally attached to the fixed frame by a fixed bracket, and can be moved back and forth in the axial direction of the cylinder. A piston rod that is fixed to an intermediate portion of the piston rod, a shock absorber that is housed and fixed to a proximal end portion of the cylinder, and an input rod advances and retreats in the axial direction of the cylinder, and the piston rod A coil spring that is fitted and housed in the cylinder and compressed between the distal end of the fixed body of the shock absorber and the proximal end of the piston, and when the canopy enters the end region of the closed rotation, The base end of the piston rod is disposed so as to abut the front end of the input rod.

Thus, in the spring-assisted stay of the present invention, since all the components of the shock absorber are stored in the cylinder, the mounting space of the entire product is the same as the conventional spring-assisted stay that does not have a buffer function. This is the same as when using a spring-assisted stay and a shock absorber separately. Reduction effect is great.

In addition, since the shock absorber is built in the cylinder and there is no need to consider the arrangement of the spring-assisted stay and the shock absorber in parallel, the degree of freedom in setting the fulcrum position is wide and the opening angle of the canopy is increased. It can be set arbitrarily.

In the illustrated embodiment, a fixed-side bracket 6 is pivotally attached to an arm portion 3 of an end cap 2 that is fitted and fixed to the base end side of the cylinder 1 by a first shaft pin 5 that passes through a bracket bush 4. . The fixed bracket 6 is fixed to a fixed frame body 7 such as a box main body by a fixing tool 8 such as a screw.

A piston rod 11 is fitted through a guide bush 10 into a guide cap 9 that is fitted and fixed to the distal end side of the cylinder 1. A receiving hole 13 is formed in the flat tip 12 of the piston rod 11, and a movable bracket 15 is pivotally attached by a second shaft pin 14 that passes through a bracket bush 26. The movable bracket 15 is fixed to the canopy 17 by a fixing tool 16 such as a screw.

The piston rod 11 inserted deeply into the cylinder 1 is disposed on the axis of the cylinder 1. A piston 18 is fitted in an intermediate portion of the piston rod 11, and a stop ring 20 is fitted and fixed in the annular groove 19 of the piston rod 11 for positioning the piston 18 and preventing the piston rod 11 from coming off the cylinder 1. ing. A shock absorber 22 is housed and fixed in the proximal end portion of the cylinder 1 so as to be adjacent to the screw shaft 21 of the end cap 2.

The input rod 23 of the shock absorber 22 is disposed on the axis of the cylinder 1. The compression coil spring 24 is fitted in the piston rod 11 and accommodated in the cylinder 1, the proximal end of the compression coil spring 24 abuts on the distal end of the fixed body 25 of the shock absorber 22, and the distal end of the compression coil spring 24 is the piston. 19 is in contact with the base end.

When the canopy 17 is opened / closed and rotated about an opening / closing fulcrum 27 formed of a hinge shaft, the cylinder 1 rotates about the first shaft pin 5 with respect to the fixed frame body 7, while the piston rod 11 moves to the second shaft. By rotating with respect to the canopy 17 around the pin 14 and moving the piston rod 11 back and forth with respect to the cylinder 1, the entire length of the spring-assisted stay is expanded and contracted, and the compression coil spring 24 is compressed by the piston 18. Or its compression is relaxed or released.

When the canopy 17 is completely closed, the compression coil spring 24 is in the most compressed state. When the canopy 17 is lifted up by hand and rotated to open, the repulsive force of the compression coil spring 24 is applied to the weight of the canopy 17. It counters and acts as an assisting force for the opening operation of the canopy 17. Therefore, the opening operation of the heavy canopy 17 is performed lightly and easily, and the canopy 17 is opened to a predetermined angle determined by the positional relationship between the spring-assisted stay and the opening / closing fulcrum 27.

When the canopy 17 is pushed down and rotated from the open position, the compression coil spring 24 is sequentially compressed. The repulsive force of the compression coil spring 24 is applied to the support of the weight of the canopy 17 so that the canopy 17 is attenuated and buffered. It does not work as power. When the end of the closed rotation of the canopy 17 is entered, the base end 11 a of the piston rod 11 collides with the tip 23 a of the input rod 23 of the shock absorber 22. When the input rod 23 is sequentially pushed into the fixed body 25 of the shock absorber 22, the internal damping / buffering function works and the canopy 17 is damped / buffered.

As the shock absorber 22, an oil type (liquid type) shock absorber can be used. In this oil type shock absorber, a piston rod (referred to as an input rod in the present invention) in which a piston is attached to a cylinder filled with oil (refers to a liquid medium that generates viscous resistance, not necessarily oil). ) Is inserted and stroked in the axial direction of the cylinder. This piston is not completely sealed, and has a structure that allows oil to pass to some extent. This allows the piston to move in the oil when it is stroked. Further, the piston receives a viscous resistance when passing the oil, and the damping force is adjusted by controlling the resistance.
In addition, shock absorbers having various operating principles and structures can be appropriately selected and used.

It is a front view in the bracket omission state of the spring assistance type stay concerning one example of the present invention. It is a longitudinal cross-sectional view of the spring assistance type stay of FIG. It is a schematic diagram which shows the use condition of the spring assistance type stay of FIG.

DESCRIPTION OF SYMBOLS 1 Cylinder 2 Cylinder end cap 3 End cap arm part 4 Bracket bushing 5 First shaft pin 6 Fixed side bracket 7 Fixed frame body 8 Fixing tool 9 Cylinder guide cap 10 Guide bush 11 Piston rod 12 End of piston rod Flat portion 13 Receiving hole 14 Second shaft pin 15 Movable bracket 16 Fastener 17 Canopy 18 Piston 19 Annular groove 20 Stop ring 21 End cap screw shaft portion 22 Shock absorber 23 Shock absorber input rod 24 Compression coil spring 25 Fixed body 26 Bracket bushing 27 Canopy opening / closing fulcrum

Claims (1)

A cylinder whose base end is pivotally attached to a fixed frame by a fixed bracket, a piston rod which is movable forward and backward in the axial direction of the cylinder, and whose tip is pivotally attached to a canopy by a movable bracket; and the piston rod A piston fixed to the middle part of the cylinder, a storage end fixed to the base end side part of the cylinder, and an input rod fitted into the piston rod and stored in the cylinder, the input rod moving forward and backward in the axial direction of the cylinder, A coil spring compressed between the distal end of the fixed body of the shock absorber and the proximal end of the piston, and the proximal end of the piston rod is the input rod when the canopy enters the end of the closed rotation Spring-supported stay for canopy arranged to contact the tip of the canopy.

Images