JPH0328137Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention applies a wire rope connected to the window panel to a rotating drum by urging a window board installed at a remote location such as a high window in a building in the direction of window opening. This invention relates to a handle for driving a rotating drum of a window opening/closing device, which closes a window by winding it up and opens the window by letting out a wire rope from the rotating drum.

Problems to be solved by conventional techniques and inventions Conventionally, such opening/closing devices have a wire rope attached to a wall near the user's hand, which is connected to a window plate that is urged in the window opening direction by a biasing device. The handle connected to the rotating drum is turned in the winding direction of the wire rope, and the wire rope is wound around the rotating drum against the urging force of the window plate in the window opening direction. The window is closed by opening the window, and a ratchet mechanism energized by the rotating drum prevents the rotating drum from rotating in the opposite direction and holds the window plate in the closed position. The window is opened by disengaging the locking pawl of the ratchet mechanism from the ratchet wheel to enable the rotating drum to rotate in the opposite direction, and by letting out the wire rope from the operation box. When closing the window again, the handle may be accidentally turned in the opposite direction to the winding direction of the wire rope, and if this happens, the wire rope that has been unwound around the rotating drum will be unwound.
It had the disadvantage that it became tangled around the rotating drum, making it impossible to operate.

The present invention eliminates these drawbacks and makes it impossible to turn the handle because it collapses when the handle is turned in the opposite direction to the winding direction of the wire rope. It is an object of the present invention to provide a handle for a window opening/closing device that prevents entanglement.

Embodiment Hereinafter, an embodiment of the present invention will be described based on the accompanying drawings.

In FIG. 1, reference numeral 1 denotes an operation box fixed to a wall 2 of a building, and at the bottom of this operation box 1 is a rotating drum 6 with flanges 3 and 5 formed at both ends.
is rotatably supported, and this rotating drum 6
A wire rope 10 has one end connected to the body 7 of the control box 1 and is passed through a through hole 8 at the upper end of the operation box 1.
The other end is connected to a window plate (not shown) provided on the wall 2 above the operation box 1, and this window plate is urged in the window opening direction by a biasing device (not shown) to rotate. The window is closed by rotating the drum 6 clockwise and winding the wire rope 10, and when the rotation of the rotating drum 6 is stopped, the ratchet mechanism A provided in the center of the operation box 1 causes the rotating drum 6 to rotate in the opposite direction. The ratchet mechanism A is rotatably supported by a screw 12 and is supported by a spring force. The locking portion 16 of the arm 14 is biased to rotate counterclockwise.
is in contact with the side surface of the push button 18 which has been returned to the guide cylinder 17 of the bottom plate 13 and fitted via the spring 20, when the claw piece 15 pivotally supported by the arm 14 fully presses one of the collars 5 of the rotating drum 6. The structure is such that the rotating drum 6 is prevented from rotating in reverse by engaging with the engaging teeth 9 formed on the circumference by spring elasticity, and when the push button 18 is pushed in, the arm 14 is inserted into the groove 21 formed in the side surface of the push button 18. When the locking part 16 is fitted and the arm 14 is rotated counterclockwise, the claw piece 15 is separated from the engagement tooth 9 of the collar 5, so that the rotating drum 6 can be rotated in the opposite direction, and the wire rope is rotated in the opposite direction. 10 is extended to open the window, and in order to close the window again from this open state, when the rotating drum 6 is turned clockwise, the arm 14 is rotated clockwise by a link mechanism (not shown). The claw piece 15 engages with the engagement tooth 9 again,
The wire rope 10 is returned to a state in which it can be wound.

A rectangular attachment hole 22 is formed in the center of the rotating drum 6, and a handle 23 according to the present invention is attached and detached by fitting a connecting shaft 26 formed on the back surface of the base end of the arm 25 into this attachment hole. The arm 25 of the handle 23 is freely attached, and the tip of the arm 25 is formed with a thick part 27 that protrudes from the front side.As shown in FIG. Connecting wire rope 1 with rotating drum 6
A core rod in which a split groove 28 whose rear side surface in the winding direction of 0 is open is formed, and a flat part having a width approximately equal to the split groove 28 is formed by converging from the base end of the round bar to the center. The base end of the flat part 30 is inserted into the split groove 28, and both ends of the pin 33 inserted into the axial long hole 32 transparently provided in the flat part are fixed to the mounting holes 34, 34 on both sides of the split groove 28, respectively. The core rod 30 is supported so as to be able to move a certain distance in the axial direction and to rotate 180 degrees rearward in the winding direction of the rotating drum 6, and is supported on both sides of the base end of the flat part of the core rod 30. A locking protrusion 37 is formed protruding therein, and the locking protrusion 37 is formed when the inner part of the split groove 28 is widened to both sides and the core rod 30 rotates.
An escape space is formed, and the groove 28
Core rods 3 are located on both sides of the pins 33 on both sides of the
Grooves 35 and 36 are formed on the front and back sides of the arm 23, into which the locking protrusions 37 fit tightly when the arm 23 is in an upright position, and the core rod 30 has grooves 35 and 36 formed thereon on the outer periphery thereof. A cylindrical handle 38 to be fitted is slidably fitted on the outside, and a coil spring 40 is installed between an enlarged diameter step 39 on the inner periphery of the tip of the handle 38 and a flange 41 formed at the tip of the core rod 30. The handle 38 is pressed against the arm 25 by the elasticity of the handle 38, and normally the handle 38 is pressed against the arm 25 by the elastic force of
8 and the locking protrusion 37 of the core rod 30 are connected to the arm 2.
The handle 38 is held in an upright position on the front side of the arm 25 by pinching the thick portion 27 of the arm 25 from both sides with spring elasticity.

Next, to explain the operation of this embodiment, the handle 2
3 in the winding direction of the wire rope 10 of the rotating drum 6 to wind up the wire rope 10, the window is closed.If the handle 23 is turned in the winding direction of the rotating drum 6, the window is closed as shown in FIG. As shown by arrow a, a force is applied to the handle 38 to tilt it in the direction of turning the handle 23, and the side surface of the core rod 30, the hole edge 29 of the split groove 28, the locking protrusion 37 and the groove 36
The handle 23 can be rotated because the handle 38 is held in an upright position without falling down by the engagement with the handle 38. However, if the handle 23 is accidentally turned in the opposite direction at this time, the handle 38 will not fall as shown in Figure 3. As shown by the arrow b, a tilting force acts on the handle 38 in the direction of rotation, and the base end of the handle 38 is pressed by the corner of the thick part 27 of the arm 23, and the base end of the core rod 30 is pressed. The locking protrusion 37 is pressed by the corner of the groove 36 of the split groove 28, and the handle 38 extends against the elasticity of the coil spring 40, and the core rod 30 contracts, as shown by the dashed line in FIG. Like, handle 3
8 falls to the side of the arm 23, making it impossible to turn the handle 23. In addition,
In this embodiment, as shown in FIG.
8 by 180 degrees from the solid line position in the figure, the locking protrusion 37 at the proximal end of the core rod 30 engages with the groove 35 of the split groove 28, so that the handle is rotated as shown by the two-dot chain line in the figure. 38 is held in an upright position on the back side of the arm 23, which is advantageous for storing the handle 23 when it is removed from the rotating drum 6 and is not in use.

Structure and effects of the device As specifically explained in the above embodiments,
The handle for a window opening/closing device of the present invention closes a window by winding a wire rope connected to a window plate biased in the window opening direction around a rotating drum, and opens the window by letting out the wire rope from the rotating drum. A base end of an arm is connected to the center of the rotating drum of a window opening/closing device configured to be a window, and a groove is formed at the tip of the arm on a rear side surface of the rotating drum in the winding direction. , the proximal end of the core rod is inserted into the split groove, and supported by a pin passed between the split grooves so that it can freely tilt into the split groove and cannot tilt in the opposite direction; The gist is that a cylindrical handle is fitted into the rod so that it can move freely in the axial direction, and the handle is brought into elastic contact with the arm by the elasticity of a spring installed between the core rod and the handle. If the wire rope is turned in the wire rope payout direction past the handle, the handle will fall sideways and become inoperable, preventing the rotating drum from being driven in the wire rope payout direction and causing the wire rope to be wound onto the rotating drum. This has the effect of reliably preventing the wire rope from being unwound and entangled.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view of a handle according to the present invention, and FIG. 3 is a sectional view thereof. 6: Rotating drum, 10: Wire rope, 25:
Arm, 28: split groove, 30: core rod, 33: pin,
38: Handle, 40: Coil spring.

Claims (1)

[Scope of utility model registration request] The window is closed by winding the wire rope connected to the window plate, which is biased in the window opening direction, around a rotating drum.
The base end of an arm is connected to the center of the rotating drum of the window opening/closing device which opens the window by letting out the wire rope from the rotating drum, and the tip of the arm is connected to the winding direction of the rotating drum. A split groove opened on the rear side surface is formed, the proximal end of the core rod is inserted into the split groove, and a pin passed between the split grooves allows the core rod to freely tilt into the split groove, and The handle is supported so that it cannot be tilted in the opposite direction, and a cylindrical handle is fitted to the core rod so as to be freely movable in the axial direction, and the handle is elastically contacted to the arm by the elasticity of a spring installed between the core rod and the core rod. A handle for a window opening/closing device.