JP3143665B2 - Window opening adjuster - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a window opening adjuster in which a window can be fixed steplessly at an arbitrary opening position.

[0002]

2. Description of the Related Art An opening adjuster having a stepless opening adjustment is known from Japanese Utility Model Laid-Open No. 59-54676. This forms an adjusting rod with a pair of mold members connected in a stretchable manner, a rack tooth is arranged on an inner mold member, and a pair of engaging plates engaging with the rack teeth on an outer mold member. An operation knob for switching to an engaged state is provided. The pair of engagement plates are swingably supported toward the rack teeth, and are urged to a non-engagement position by a spring. When the operation knob is slid at an arbitrary position and the both engagement plates are expanded and swung against the spring, the teeth provided on the engagement plates are engaged with the rack teeth, so that the pair of mold members can be prevented from expanding and contracting. .

[0003]

In the above-described opening amount adjuster, the pair of engaging plates are held in an expanded position by wedge pieces provided on the operation knob, and the friction of the leaf spring provided on the inner surface of the outer mold member is increased. The switching position of the operation knob is fixedly held by force.
However, both engagement plates are always urged toward the non-engagement posture by a spring. In addition, when an external force is received via the engagement plate, the operation knob can be displaced toward the standby position side against the frictional force of the leaf spring. For this reason, for example, when the window flaps due to wind, the engagement plate may be gradually separated from the rack teeth and disengaged, and there is a concern about application to a large and heavy window. In rare cases, the teeth of the engaging plate and the peaks of the rack teeth may be in contact in the locked state, and if left unnoticed, the window may be hit by a gust and collide with the window frame or outer wall There is a danger of doing. In addition, in such an opening amount adjuster, a mold inside the groove and an outside mold having a larger width are indispensable. Since such a mold material requires a relatively large width or thickness from the viewpoint of strength, it is difficult to achieve compactness. In addition, since the inner side of the mold is exposed, the rack teeth and the like are conspicuous, and the appearance is not preferable. SUMMARY OF THE INVENTION It is an object of the present invention to provide a regulator that performs a stepless adjustment of an opening amount, in which a window can be reliably maintained in a locked state, and a window opening amount regulator that is compact and has excellent appearance.

[0004]

An opening adjuster according to the present invention comprises a cylindrical casing having one end supported by a window frame.
And an adjustment rod 4 housed at the other end of the casing 3 so as to be able to protrude and retract, and one end of which is supported by the window 2, and a lock for preventing the adjustment rod 4 from moving steplessly at any open position of the window 2. A locking mechanism is configured by using an external screw 14 provided on the adjusting rod 4 and an internal screw 16 of a screw block 15 rotating in the circumferential direction in the casing 3 as engagement elements. The outer screw 14 has its axis A eccentric with respect to the rotation center B of the screw block 15, and the screw block 15 is rotated by the operation lever 20 rotatably mounted on the outer periphery of the casing 3. Thus, the requirement is that the inner screw 16 be moved between a locked position C where it engages the outer screw 14 and an unlocked position D which is separated from the outer screw 14. The outer screw 14 with respect to the rotation center B of the screw block 15
When only the portion is decentered, the adjusting rod 4 is composed of a screw rod 10 that moves in the axial direction within the casing 3 and a rod 9 having one end supported by the window 2. An external screw 14 is formed over the entire surface .

[0005]

When the screw block 15 is rotated in the circumferential direction by the operation lever 20 to the lock position C, the inner screw 16 of the screw block 15 is externally engaged with the outer screw 14 of the adjusting rod 4. When an external force in the axial direction acts on the adjusting rod 4 in this state, the external force is received by the casing 3 via the screw block 15 or the like, so that the axial movement of the adjusting rod 4 can be prevented.
That is, the internal screw 1 is moved by the axial external force acting on the adjusting rod 4.
The engagement state of the outer screw 14 with the outer screw 6 is not released without permission, and the window 2 is securely fixed at an arbitrary open position. When the screw block 15 is turned to the unlock position D by the operation lever 20, the inner screw 16 moves and the engagement state with the outer screw 14 is released. In this case, the adjusting rod 4 can be slid freely.

[0006]

According to the present invention, a lock mechanism is constituted by using the outer screw 14 provided on the adjusting rod 4 and the inner screw 16 provided on the screw block 15 as engaging elements, and the screw block 15 is operated by the operation lever 20. Since the inner screw 16 is engaged with the outer screw 14 by rotating, even when an external force in the axial direction acts on the adjusting rod 4 in the locked state, the movement of the adjusting rod 4 can be reliably prevented. Therefore, a window opening regulator excellent in reliability and safety that can reliably fix the window 2 at an arbitrary opening position can be obtained. In addition, since the adjusting rod 4 and the screw block 15 are housed in the cylindrical casing 3 and the cylindrical operation lever 20 is mounted on the casing 3, it is possible to make the casing 3 more compact than the conventional one using the shape member. In addition, since the casing 3, the operating lever 20, and the adjusting rod 4 are continuous in a straight line, the appearance is neat and the appearance is good.

[0007]

【Example】

(First Embodiment) FIGS. 1 to 5 show a first embodiment of an opening adjuster for a window according to the present invention. In FIG. 4, an opening adjuster is provided between the window frame 1 and the window 2. The opening adjuster includes a metal cylindrical casing 3, a metal adjusting rod 4 housed at the other end of the casing 3 so as to be able to protrude and retract, and a lock mechanism provided between the casing 3 and the adjusting rod 4. And so on.

The casing 3 has one end rotatably supported by the window frame 1 via a bracket 5, and has a cutout hole 6 at a substantially middle portion in the longitudinal direction (see FIG. 3). Adjusting rod 4
Is a rod 9 having one end connected to the window 2 via the bracket 7 and a screw rod 10 sliding only in the casing 3.
It is composed of The rod 9 is disposed at the axis of the casing 3 as shown in FIG. 2 and protrudes and retracts via a cap 11 attached to an end of the casing 3. The rod 9 and the threaded rod 10 are connected via a connection block 12 slidably housed in the casing 3. A retaining pin 13 is fixed to the other end of the screw rod 10 in a vertically penetrating manner.

The lock mechanism includes an outer screw 14 provided on the entire peripheral surface of the screw rod 10 and an inner screw 16 provided on a metal screw block 15 which rotates in the circumferential direction in the casing 3.
Is an engagement element. The outer screw 14 is shown in FIG.
As shown in FIG. 2, the axis A is provided at a position eccentric with respect to the rotation center B of the screw block 15. In other words, the screw rod 10 is eccentric from the axis of the casing 3.

As shown in FIGS. 1 and 3, the screw block 15 has a horizontally long semicircular block main body 17 and a horizontally long fan-shaped holding portion 19 integrally provided on the outer peripheral surface of the block main body 17.
The inner surface of the block body 17 is provided with a concave arc surface circumscribing the outer screw 14, and the inner screw 16 meshing with the outer screw 14 is formed on the concave arc surface. The block body 17
The casing 3 is accommodated in the casing 3 through the cutout hole 6, and the outer peripheral surface thereof is in contact with the inner peripheral surface of the casing 3. Holder 1
Numeral 9 protrudes from the outer peripheral surface of the casing 3 so that both ends in the longitudinal direction extend to both sides of the cutout hole 6. The screw block 15 rotates within a certain range around a rotation center B common to the axis of the casing 3 with the outer peripheral surface of the block body 17 being guided by the inner peripheral surface of the casing 3.

In order to rotate the screw block 15 in the circumferential direction, an operation lever 20 is mounted on the outer periphery of the casing 3,
The screw block 15 is fixed to the operation lever 20. As shown in FIGS. 1 and 2, the operation lever 20 is formed in a cylindrical shape having a short length in the longitudinal direction, and has an engaging groove 21 provided in the inner peripheral surface in the longitudinal direction. When the operation lever 20 is mounted from the end of the casing 3, the holding portion 19 is fitted into the retaining groove 21. Then, when the operation lever 20 is operated to the lock position C, as shown in FIG.
When the operation screw 20 is operated to the unlock position D, the inner screw 16 separates from the outer screw 14 as shown in FIG.

In order to fix the screw block 15 at the lock position C or the unlock position D, a restriction block 22 is disposed on one side surface of the block body 17 as shown in FIG. The restriction block 22 includes a cylindrical small-diameter portion 23 and a flange portion 24 provided on a part of the outer peripheral surface thereof, and the screw rod 10 passes through an insertion hole 25 provided at the center of the small-diameter portion 23.
A flat locking surface 26 is provided on the outer peripheral surface of the small diameter portion 23. A lock groove 27 and an unlock groove 29 are provided at positions corresponding to the lock position C and the unlock position D on the outer peripheral surface of the flange portion 24.
Are provided respectively. This is because the ball or the like (not shown) inserted into the positioning hole 30 of the holding portion 19 is selectively engaged with each of the grooves 27 and 29 in accordance with the operation of the operation lever 20, so that the operation lever 20 is free. To prevent rotation. The restriction block 22 has a small-diameter portion 23 fitted into the casing 3 through the cutout hole 6. The collar 24 is
It is located between one side surface of the notch hole 6 and one side surface of the block body 17, and both ends in the circumferential direction are locked to circumferential end surfaces of the notch hole 6.

As shown in FIG. 2, a guide member 31 is provided at one end of the casing 3 so that the screw rod 10 can slide smoothly. The guide member 31 is formed by projecting an elongated plate portion 32 at the inner end of the cap portion. The outer peripheral surface of the plate portion 32 is in contact with the inner peripheral surface of the casing 3, and the distal end portion is engaged with the casing 3. It is inserted between the stop surface 26. Screw rod 1
When the 0 slides, the upper end of the retaining pin 13 is
2 will move along the lower surface 33.

[0014] The opening amount adjuster constructed as described above is shown in FIG.
After operating the operation lever 20 to the unlock position D and opening the window 2 by an arbitrary amount as shown in FIG. 1, the operation lever 20 is operated to the lock position C as shown in FIG. The screw 16 is engaged with the external thread 14 of the threaded rod 10. In this engaged state, the casing 3 receives the external force acting on the screw rod 10 via the screw block 15 and the restriction block 22 and the like, so that the screw rod 10 and the rod 9 are prevented from moving and the window 2 can be fixed and held. Also,
Since the screw rod 10 is to be engaged, the screw block 15 can be engaged steplessly at an arbitrary position within the range of its length. In this embodiment, the movement range of the screw rod 10 is the point where the retaining pin 13 contacts the restriction block 22 and the end surface of the screw rod 10 hits the inner end of the cap portion. When the screw rod 10 moves, the upper end of the retaining pin 13 moves along the lower surface 33 of the plate portion 32.
No. 0 can move smoothly while maintaining a constant posture without tilting in the casing 3.

[0015] The Contact, when forming the adjustment lever 4 with one rod is a site located in the casing 3, an external thread 14 is formed only at a portion corresponding to the movement amount of the adjusting lever 4 Good to keep.

[Brief description of the drawings]

FIG. 1 is a cross-sectional front view of a lock mechanism showing a locked state.

FIG. 2 is a vertical sectional front view of an opening amount adjuster with a part omitted.

FIG. 3 is an exploded perspective view showing an engagement portion structure of the lock mechanism.

FIG. 4 is an overall plan view of an opening amount adjuster.

FIG. 5 is a cross-sectional front view of the lock mechanism showing an unlocked state.

[Explanation of symbols]

 A axis center B rotation center C lock position D unlock position 1 window frame 2 window 3 casing 4 adjustment rod 9 rod 10 screw rod 14 outer screw 15 screw block 16 inner screw 20 operation lever

Claims (2)

(57) [Claims] 1. A cylindrical casing 3 having one end supported by a window frame 1; an adjusting rod 4 housed at the other end of the casing 3 so as to be able to protrude and retract; and one end supported by a window 2; An opening adjuster for a window provided with a lock mechanism for preventing movement of the adjusting rod 4 in a stepless manner at an arbitrary open position, wherein the locking mechanism includes an outer screw 14 provided on the adjusting rod 4, a casing, 3, the inner screw 16 of the screw block 15 which rotates in the circumferential direction is used as an engagement element.
The operation lever 2 is rotatably mounted on the outer periphery of the casing 3.
0 for rotating the screw block 15 to move the inner screw 16 between a locked position C where it engages the outer screw 14 and an unlocked position D where it is separated from the outer screw 14. Opening regulator. 2. An adjusting rod 4 is connected to a screw rod 10 which moves in the axial direction within the casing 3, and the other end is connected to the screw rod 10.
One end is composed of a rod 9 supported by the window 2,
2. The opening adjuster for a window according to claim 1, wherein an external thread is formed on both ends of the threaded rod .