JPH0640824Y2 - Fixed type stay - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed stay which can hold and hold a wing body such as a door or a lid to a fixed frame body such as a building body or a box body in a predetermined open state.

[0002]

2. Description of the Related Art In a conventional fixed stay disclosed in Japanese Utility Model Publication No. 55-10532, a first arm 1 having a two-piece structure is used.
The second arm 2 is fitted between the two arms, the second arm is pivotally connected to the tip of the first arm at a position slightly closer to the middle part than the tip part, and the first arm has a slot at a position closer to the middle part. Provided in the vertical direction, a receiving groove is provided in the lengthwise direction at the tip of the second arm, and a cross-shaped lock plate that engages with and disengages from the receiving groove is fitted into the slot, and a pair of springs of the lock plate protruding from the slot. Two tension coil springs are provided on the front and back sides between the receiving end portion and the spring receiving portion cut and raised on the ventral surface of the first arm to urge the lock plate to slide in the receiving groove.

In this fixed type stay, when the wing body is opened up to a predetermined angle, the lock plate is engaged with the receiving groove by the biasing force of the tension coil spring and is fixedly held in the open state. In use, the long tension coil springs on the front and back exposed from the ventral surface of the first arm are an obstacle, and there is a risk of pinching a fingertip or a peripheral object.

Furthermore, in this fixed stay, when a force in the closing direction acts on the wing body due to wind pressure or the like, bending stress is applied in the plate thickness direction to the lock plate engaged with the receiving groove of the second arm. It worked, and sometimes the lock plate was distorted and deformed.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is that the lock mechanism between the first arm and the second arm is compactly constructed, and there is a risk that a fingertip or a peripheral object is caught in the biasing spring of the lock means. It is an object of the present invention to provide a fixed stay that can be safely used without any deformation, and that has no distortion of the lock plate and has a sufficiently high structural strength.

[0006]

The fixed type stay of the present invention will be described below with reference to the reference numerals in the accompanying drawings.
A first arm 1 made of a flat bar is slidably fitted in a second arm 2 made of a square pipe, and a first bracket 3 is connected to a tip end portion of the first arm 1 by a pivot 4,
The second bracket 5 is connected to the base end portion of the arm 2 by the pivot 6, and the side end surface 1a of the first arm 1 is provided with a notch 7,
Guide holes 8a, 8b are provided in the transverse direction at the tip portions of the left and right side wall plate portions 2a, 2b of the second arm 2, and a lock plate 9 slidably fitted in the guide holes 8a, 8b is attached to the first arm 1. Place it on the back side.

A locking protrusion 10 which engages and disengages with the notch 7 is cut and raised at a portion near the middle portion of the lock plate 9, and the left end wall of the second arm 2 is provided at the left end portion of the lock plate 9 protruding from the guide hole 8a. Secure the retaining member 11 that comes into contact with the plate portion 2a,
An opening 13 for accommodating the bamboo shoot spring 12 is provided at the right end of the lock plate 9, and an inward projection 15 is provided at the center of the right edge 14 of the opening 13 projecting from the guide hole 8b. The small-diameter end 12a of the bamboo child spring 12 fitted to and supported by the abutment is brought into contact with the right edge 14 of the opening 13, while the large-diameter end 12b of the bamboo child spring 12 is attached to the right wall plate 2b of the second arm 2. Abut.

In another embodiment, in the fixed type stay, a plurality of notches 7 are provided in the side end surface 1a of the first arm 1 along the length direction.

[0009]

In one mode of use of this fixed stay, the first bracket 3 is fixed to the wing body 16 and the second bracket 5 is fixed to the fixed frame body 17. When the wing body 16 is opened and rotated about the hinge shaft 18, the first arm 1 rotates about the pivot shaft 4 with respect to the wing body 16 while the second arm 2 is rotated.
The arm 2 rotates about the pivot 6 with respect to the fixed frame body 17, and the first arm 1 is pulled out from the second arm 2.

During this rotation operation, the locking projection 1 of the lock plate 9
The abdominal surface 10a of 0 is in sliding contact with the side end surface 1a of the first arm 1. When the wing body 16 is rotated by a predetermined angle, the lock plate 9 is guided by the urging force of the bamboo spring 12 to guide holes 8a, 8a.
The lock protrusion 9 of the lock plate 9 is automatically engaged with the notch 7 of the first arm 1 by being pulled to the right along b. Since this engaged state is accurately maintained by the urging force of the bamboo spring 12, the wing body 16 is fixedly held at a predetermined open position.

To close the wing body 16, the lock plate 9 is slid to the left along the guide holes 8a and 8b against the urging force of the bamboo spring 12, and the locking protrusion 10 of the lock plate 9 is moved to the first position. By disengaging the first arm 1 from the cutout 7, the first arm is placed slidably along the second arm 2. When the wing body 16 is closed and rotated about the hinge shaft 18, the first arm 1 rotates about the pivot shaft 4 with respect to the wing body 16 and the second arm 2 is fixed about the pivot shaft 6 as described above. The first arm 1 rotates with respect to the frame body 17.
Are sequentially pushed into the second arm 2.

When the wing body 16 rotates slightly and the locking projection 10 of the lock plate 9 moves to a position where it does not face the notch 7, the finger is released from the lock plate 9. During the subsequent rotation operation, the abdominal surface 10a of the locking projection 10 of the lock plate 9 is brought into sliding contact with the side end surface 1a of the first arm 1 and the wing body 16 is closed.

When the first arm 1 is provided with a plurality of notches 7, the opening angle of the wing body 16 is different by appropriately selecting the notches 7 with which the locking projections 10 of the lock plate 9 are engaged. Is held fixed in a plurality of open positions.

[0014]

In the illustrated embodiment, the first arm 1 is composed of a thick flat bar, and two notches 7 are provided. A guide block 19 slidably contacting the left and right side wall plate portions 2a and 2b and the front and rear side wall plate portions 2c and 2d of the second arm 2 is fixed to the tip end portion of the first arm 1, and the tip end portion of the second arm 2 is A steady rest 20 into which the first arm 1 is fitted is fitted and fixed.

A corrugated spring pin is used as the retaining member 11, and is fitted and fixed in the through hole 21 of the lock plate 9. Central protrusion 22 of the guide block 19
Is in a position where it abuts on the lock plate 9 and prevents the first arm 1 from being completely withdrawn from the second arm 2.

[0016]

As described above, in the fixed type stay of the present invention, the first arm 1 made of the flat bar is slidably fitted into the second arm 2 made of the square pipe, and the first arm 1
Is formed in the side end surface 1a of the second arm 2, guide holes 8a, 8b are provided in the left and right side wall plate portions 2a, 2b of the second arm 2 in the transverse direction, and a lock plate 9 is slidably fitted in the guide holes 8a, 8b. Since the locking projection 10 which is fitted and disengaged with the notch 7 is cut and raised at a portion near the middle portion of the lock plate 9, when the force in the closing direction acts on the wing body 16 due to wind pressure or the like, the first arm 1
The force applied to the lock plate 9 via the bearings is evenly distributed and supported by the left and right side wall plate portions 2a and 2b of the second arm 2, and the force is exerted on the locking projection 10. Since it acts not in the plate thickness direction but in the plate width direction, and the structural strength is sufficiently high, even if a considerable force is applied, the lock plate 9 and the locking projection 10 are distorted and deformed. It can be used for a long period of time without fear of failure.

Further, in the fixed stay of the present invention, the bamboo shoot spring 12 is housed in the opening 13 at the right end of the lock plate 9 fitted in the guide holes 8a, 8b of the second arm 2, and the opening 13 is formed.
Bamboo child spring 12 is fitted and supported on the inward projection 15 of the right side edge surface 14, and the small diameter end portion 12a of the bamboo child spring 12 is brought into contact with the right side edge surface 14 of the opening portion 13. Since 12b is brought into contact with the right side wall plate portion 2b of the second arm 2, the lock mechanism between the first arm 1 and the second arm 2 is configured compactly, and the biasing bamboo spring 10 of the lock plate 9 is provided. There is almost no danger that your fingertips or surrounding objects will be caught in it, and it can be used safely.

In the fixed stay according to claim 2, since the plurality of notches 7 are provided on the side end surface 1a of the first arm 1 along the length direction, the wing body 16 is provided at a plurality of positions having different opening angles. Can be held fixed at.

[Brief description of drawings]

FIG. 1 is a front view showing a usage state of a fixed stay according to an embodiment of the present invention.

FIG. 2 is a partially cutaway front view of the fixed stay.

FIG. 3 is a right side view of the fixed stay.

4 is a cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 1st arm 1a Side end surface of 1st arm 2 2nd arm 2a Left side wall plate part of 2nd arm 2b Right side wall plate part of 2nd arm 2c Front side wall plate part of 2nd arm 2d Rear side wall plate of 2nd arm Part 3 First bracket 4 Axis 5 Second bracket 6 Axis 7 Notch 8a Guide hole 8b Guide hole 9 Lock plate 10 Locking protrusion 10a Vent face of locking protrusion 11 Locking member 12 Bamboo spring 12a Small diameter end of bamboo spring 12b Large diameter end of bamboo shoot spring 13 Opening 14 Side edge of opening 15 Inward projection 16 Wing body 17 Fixing frame 18 Hinge shaft 19 Guide block 20 Stead cap 21 Lock plate through hole 22 Central projection

Claims (2)

[Scope of utility model registration request] 1. A first arm 1 made of a flat bar is slidably fitted in a second arm 2 made of a square pipe, and a first bracket 3 is connected to a tip end portion of the first arm 1 by a pivot 4, The second bracket 5 is connected to the base end portion of the arm 2 by a pivot 6 and the side end surface 1a of the first arm 1 is provided with a notch 7 so that the left and right side wall plate portions 2a and 2b of the second arm 2 are provided.
Guide holes 8a and 8b are provided at the tip end of the lock plate 9 in the transverse direction, and the lock plate 9 slidably fitted in the guide holes 8a and 8b is firstly provided.
A lock protrusion 10 that is arranged on the back side of the arm 1 and engages and disengages with the notch 7 is cut and raised at a portion near the middle portion of the lock plate 9 and is provided at the left end of the lock plate 9 protruding from the guide hole 8a. The retaining member 11 that comes into contact with the left side wall plate portion 2a of the two-arm 2 is fixed, an opening portion 13 for accommodating the bamboo spring 12 is provided at the right end portion of the lock plate 9, and the opening portion 13 protruding from the guide hole 8b is provided. An inward projection 15 is provided at the center of the right edge surface 14.
And the small diameter end 12a of the bamboo spring 12 fitted and supported by the inward projection 15 is supported on the right side edge surface 14 of the opening 13.
The fixed stay in which the large diameter end portion 12b of the bamboo spring 12 is brought into contact with the right side wall plate portion 2b of the second arm 2 while being brought into contact with. 2. The fixed stay according to claim 1, wherein a plurality of notches 7 are provided on the side end surface 1a of the first arm 1 along the length direction.