JPH0563813B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a window opening/closing device, and particularly to a device for opening and closing a tall window such as a ventilation and smoke exhaust window using a rope attached to the window frame.

(Prior art) The most typical example of this type of window opening/closing device is
This is a device as shown in FIG. FIG. 2 shows the internal structure of the handle box 1, which is the main part of such a window opening/closing device. This handle box is provided with a handle 2 for winding up the rope R when closing the window, and a push button 3 for releasing the lock of the drum in order to send out the rope when opening the window.

Two pawl members 6 and 7 are provided that are elastically pressed so as to mesh with gears 5 fixed to the rope winding drum 4, and a member 8 that supports these pawl members 6 and 7 is attached to the drum 4. It is provided adjacent to and pivotable around a pivot shaft 9. The pawl member 6 acts as a ratchet means to prevent the drum 4 from rotating backwards when the rope is wound up. Said pivotable support member 8 is provided between the drum 4 and the push button 3. This push button 3 is composed of a cylindrical member that moves up and down elastically. A cut portion is provided in the middle of this member, and one end of the support member is inserted into this cut portion. The support member 8 is adapted to pivot elastically between the drum 4 and the push button 3.

When the pushbutton 3 is pressed, the support member 8 pivots so that one end thereof enters the notch in the pushbutton member, so that the pawl member 6 is disengaged from the gearwheel 5 and the pawl member 7 engages with the gearwheel 5. Therefore, the ratchet means is released, and the drum 4 can be rotated in the rope feeding direction (counterclockwise in the figure). On the other hand, when the drum 4 is rotated in the rope winding direction (clockwise direction in the figure), the pawl member 7 meshing with the gear 6 is pushed toward the push button 3, and as a result, the support member pivots and one end of the pawl member 7 is pushed toward the push button 3. comes off from the notch member of the push button. As a result, the push button is pushed upward elastically, and one end of the support member is locked to the side surface of the push button member. This pivoting movement of the support member brings the pawl member 6 into mesh with the gear wheel 5 and returns to the ratcheted condition.

In this device, the handle is directly connected to the drum and constantly rotates with the drum, so the handle rotates even when the rope is being fed out, which is extremely dangerous. Also, the rope can be wound up even if the rope is rotated counterclockwise, but in that case, the rope will not ratchet, which is dangerous.

To solve this problem, there is a window opening/closing device shown in FIG. In this device, the rotation axis of the take-up drum 10 and the rotation axis of the handle 11 are arranged separately, and this rotation axis is provided with a gear 13 that meshes with a drum-side gear 12. A plurality of saw-shaped projections 14 are provided circumferentially on the upper surface of this gear. On the handle side, there is a flange 1 having a plurality of similar protrusions on the lower surface corresponding to the protrusions 14.
5 is provided. The ratchet function, which prevents the drum from reversing when the handle is rotated clockwise to wind up the rope, is accomplished by a lever member 16 extending in the longitudinal direction of the handle box. A pawl member 6 (not shown) is provided at one end of the lever member and is adapted to be engaged with the shaft of the drum. The other end of the lever member is pivoted by a link mechanism 17, which engages with the tapered surface 18A of the push button 18.

When the pushbutton 18 is pressed, its tapered surface contacts and biases the linkage, so that the lever member 17 pivots closer to the rotating shaft of the handle and the pawl member provided at one end of the lever member 17 engages the drum. comes off the shaft. The drum 10 is then able to rotate in a counterclockwise direction,
The rope is fed out from the handle box. At this time, the flange 15 on the handle side is not connected to the gear 13, so even if the gear 13 rotates, the handle 11 does not rotate.

Normally, the flange 15 is pushed upward elastically so that it does not connect with the gear 13.
When the handle is rotated in a clockwise direction, the gear 13 is pushed down during the first rotational movement.
It is now connected to. In other words, this flange acts as a clutch mechanism.

A cam (not shown) is also fixed to the lower end of the rotating shaft of the handle, and while the cam rotates, the lever member pivots away from the rotating shaft, so that the pawl member rotates the shaft of the drum. The link mechanism acts to maintain this state while being locked. This places the drum in a ratcheted state and prevents the drum from rotating in a counterclockwise direction.

(Problems to be Solved by the Invention) In the window opening/closing device shown in FIG. 3, the rotating shaft of the drum and the rotating shaft of the handle are juxtaposed, and a gear is interposed between the two rotating shafts to connect them. Therefore, the handle box becomes larger as a whole.

Furthermore, since there is no interlocking relationship between the clutch mechanism that connects the handle and the drum and the ratchet mechanism that prevents the drum from reversing, there is no interlocking relationship between the clutch mechanism that connects the handle and the drum, and the ratchet mechanism that connects the drum. The moment of locking and which is achieved sooner depends on the position on the active surface of the cam fixed to the lower end of the handle shaft. Therefore, if the latter point is later than the former point, there is a risk that the handle will turn upside down if the person attempting to close the window loosens his/her grip on the handle.

Further, depending on the position of the handle, the handle and the drum may remain connected even when the ratchet mechanism is released, which is also undesirable because the handle rotates with the rotation of the drum. The ratchet mechanism is released when opening a window, and in this case, the rope is normally fed out rapidly by a damper, so the handle rotates at an extremely high speed. Therefore, it is dangerous.

As described above, the window opening/closing device of FIG. 3 does not completely solve the problems of the window opening/closing device of FIG. 1. The object of the present invention is to provide a window opening/closing device that completely solves the above-mentioned problems without increasing the size of the handle box.

(Means for solving the problems) In order to achieve the above-mentioned object, the present invention includes a drum for winding up a rope whose one end is attached to a window, a winding handle, and a rotational force of the winding handle. A transmission means for transmitting the rope to the drum, a ratchet means for preventing the drum from reversing when the rope is wound, a means for engaging the ratchet means with the drum, and a means for disengaging the ratchet means from the drum. In the window opening/closing device,
a first pivotable rotating member, wherein the rotating shaft of the winding handle is arranged coaxially and normally uncoupled with respect to the rotating shaft of the drum, and the transmission means engages both rotating shafts simultaneously; and the ratcheting means is connected to the first
a second rotary member, the engaging means being permanently connected to the rotating shaft of the handle; 2. A lever member that slides and frictionally engages with the side surface of the rotating member, the first rotating member rotatably attached to the pivot end of the lever member, and both shafts of the first rotating member and the handle and drum. means for locking the lever member such that the lever member is held in engagement, said release means being attached to the pivoting end of said lever member to allow its drive end to be secured to both said handle and drum. means for elastically pulling the lever member away from the shaft; and means for unlocking the lever member and moving the pivoting end of the lever member away from both the handle and drum shafts. It is characterized by

The rotating shaft of the winding handle may be provided so as to penetrate inside the rotating shaft of the drum, and gears having substantially the same diameter may be attached adjacent to both rotating shafts.

The first rotating member may include a flesh-pressure first gear arranged to mesh with the adjacent handle-side gear and drum-side gear at the same time,
The second rotating member includes a second gear that is always engaged with the handle-side gear, and a lever member that is pivotally supported on the shaft of the second gear and that slides and frictionally engages with the side surface of the second gear. the first gear rotatably attached to the pivoting end of the lever member; and means for locking the pivoting end of the lever member in a pressed state against the handle-side gear and the drum-side gear; It's okay to be.

Further, the release means includes means attached to the pivoting end of the lever member to elastically pull the pivoting end away from the handle-side gear and the drum-side gear, and the locking means. and means for moving the lever member away from the lever member.

The first gear may be configured not only as a transmission means but also as part of an engagement means, thereby giving the first gear not only the coupling function of coupling both the rotating shafts of the drum and the handle. If it includes a one-way clutch inside it, it may also have a ratchet function and a function for engaging the drum.

(Operation) When the window is open, the ratchet mechanism is released and the locking means is moved away from the lever member. In this state the pivoting end of the lever is pulled away from the rotating shafts of the handle and the drum, so that the first rotating means is also not engaged with both rotating shafts.

In this state, when the handle is rotated clockwise to close the window, the second rotating member, which is permanently connected to the rotating shaft of the handle, rotates. Accordingly, the lever member pivots due to friction with the side surface of the second rotating member to engage the first rotating member with both the rotating shaft of the handle and the drum, and the locking means maintains this engaged state. . This condition is achieved by an initial small angular rotational movement of the handle.

As a result, the rotating shaft of the handle and the rotating shaft of the drum are connected via the first rotating member. A one-way clutch provided within the first rotating member also causes the first rotating member to act to prevent reversal of the rotating shaft of the handle. On the other hand, the second
The rotating member also rotates with the rotating shaft of the handle, but since the lever member is held close to both the rotating shafts of the handle and drum by the locking means, it applies a slightly greater rotational force to the handle than the initial rotational force. , the side surface of the second rotating member will slide over the side surface of the lever member.

Note that when the handle is rotated counterclockwise, the second rotating member also rotates clockwise. At this time, since the side surface of the second rotating member rotates while sliding on the surface of the lever member, the lever member is not driven, and therefore the rotational force of the handle is not transmitted to the drum. In this way, even if the handle is rotated counterclockwise, it will have no effect on the drum.

To open the window, the lever member is unlocked and the pivoting end of the lever member is moved away from both the handle and the rotating shafts of the drum, the pivoting end of the lever member being resiliently moved. The force pulls the handle and drum away from both the shaft. As a result, the first rotating member is disengaged from both the handle and the rotating shaft of the drum, and the ratchet mechanism of the drum relative to the rotating shaft is also released.
This allows the drum to rotate freely in the direction in which the rope is delivered.

(Embodiment) FIGS. 4 and 5 are partially cutaway perspective views showing an embodiment of the window opening/closing device of the present invention. These figures show the internal structure of the handle box that constitutes the main part of the window opening/closing device. A rotating shaft 23 of a handle 22 is provided penetrating inside the rotating shaft 21 of the rope winding drum 20, and both rotating shafts are coaxial and attached to the upper and lower frames of the handle box so that they can rotate independently. It is being A gear 24 is fixed to the lower end of the rotating shaft 21 of the drum, and a gear 25 of the same diameter is fixed adjacent to the gear 24 to the lower end of the rotating shaft 23 of the handle 22. An appropriate gap is provided between both gears 24 and 25 so that they do not interfere with each other.

The rotating shaft 23 of the handle 22 is constantly engaged with the pulling gear 26. This pulling gear 26 is fixed to a pipe 28 rotatably attached to a shaft 27 fixed to the upper and lower frames of the handle box. At a position below the pulling gear, the root portion of the dogleg-shaped lever member 29 is loosely fitted into the pipe 28. pipe 28
A spring 30 is also loosely fitted in the spring 30, and several retaining rings A and washers B are interposed therebetween in the order shown in FIG.

The spring 30 acts to constantly press the lower surface of the retraction gear 26 (which is the lower surface of the washer in the drawing, but will be described below as the lower surface of the retraction gear) against the upper surface of the lever member 29. The elastic force of the spring 30 is such that during the initial rotation stage of the handle, the friction between the lower surface of the retraction gear 26 and the upper surface of the lever member 29 causes the lever member 29 to rotate around the shaft 27 as the retraction gear 26 rotates. It is large enough to pivot, but small enough to allow the lower surface of the retraction gear 26 to slide over the upper surface of the lever member 29 without requiring much force to rotate the handle. .

As mentioned above, the lever member 29 has dogleg-shaped portions 29A and 29B that can be pivoted around the shaft 27, and an interlocking gear 31 is attached to the shaft member 32 at one of the two end portions 29A. It is rotatably mounted. A one-way clutch 33 is built into the interlocking gear 31 so that the interlocking gear 31 can only rotate in the direction of the arrow. A spring stopper 34 is also attached to the upper surface of the shaft member 32. This spring stopper 3
4 will be described later.

The interlocking gear 31 has a pitch that allows it to mesh with both the drum side gear 24 and the handle side gear 25 at the same time, and its wall thickness is such that it can cover both adjacent gears. Moreover, the upper half of all the gear crests of this interlocking gear 31 are shaved off to make them flat. The reason for this is that when the interlocking gear 31 is engaged with both the drum-side gear 24 and the handle-side gear 25 at the same time, the positions of the peaks of both adjacent gears are perfectly aligned, allowing smooth engagement with the interlocking gear. It's for a reason. In other words, by forming such a mountain shape, the interlocking gear 31 becomes closer to the handle-side gear 25, which is the lower of the two adjacent gears.
After the gear 25 is slightly shifted from the position of the drum-side gear 24 located above, the flat mountain portion of the interlocking gear 31 comes to mesh with the drum-side gear 24. In this way, the interlocking gear 3
1, drum side gear 24 and handle side gear 25
When they mesh together, they can mesh smoothly without any hesitation.

In the illustrated embodiment, the interlocking gear 31 is partially modified, but the interlocking gear 31 may be the same as a normal gear and the diameter of the drum side gear 24 may be smaller than the handle side gear 25. . In this way, the handle-side gear 25 may be driven slightly faster than the drum-side gear 24.

The other pivoting end 29 of the dogleg lever member 29
B is adapted to be locked by a locking member 35. This locking member 35 is pivotally mounted around a shaft member 36 fixed to the upper and lower frames of the handle box. This locking member 35
The spring mounting part 37 is on the top surface of the pivoting part.
A spring 38 is stretched between the mounting portion 37 and a spring stop 34 on the upper surface of the shaft member 32 of the interlocking gear described above.

The locking member 35 has a substantially rectangular parallelepiped shape with a flat outer wall and a stepped inner wall. The upper part is made thicker and the lower part is made thinner. A recess 39 is provided in the inner wall of this thin portion, and the pivoting end 29B of the lever member 29 falls into the recess 39, thereby allowing the lever member 29 to
Further pivoting movement in the direction indicated by arrow a is prevented. A release means is provided above the engagement member 35 for acting on the locking member to release the locked state.

This release means has a flange 40 fixed to the upper and lower frames of the handle box, and a push button member 41 is disposed within this flange 40. This push button member 41 is normally pushed upward elastically by an elastic member (not shown). In this state, the push button member 41 slightly protrudes from the upper frame of the handle box. The lower end portion 41A of the push button member 41 has a conical shape, and its tip slightly protrudes from the flange 40. When the push button member 41 is pushed down, the conical lower end 41A contacts the inner wall of the thick portion of the locking member 35 and pushes it outward. This pivots the locking member 35 in the direction shown by arrow b, so that the pivoting end 29B of lever member 29 disengages from the recess 39 of the locking member 35 and pivots in the direction shown by arrow a. This pivoting movement is stopped when the interlocking gear 31 comes into contact with a portion of the locking member 35 near the pivot axis. That is, this part of the locking member acts as a stopper.

Next, the operation of the illustrated window opening/closing device will be explained. When the window is released, the ratchet mechanism is released and the locking member 35 is moved away from the lever member 29. In this state, the pivoting end 29B of the lever member 29 has come out of the recess 39 of the locking member 35 and is in contact with the inner wall of the thin portion thereof. At this time, the inner wall surface of the thin portion of the locking member 35 is caused by a spring stretched between the locking member 35 and the shaft member 32 of the interlocking gear.
It is pressed against the pivoting end 29B of the lever member 29.

On the other hand, the pivoting end 29A of the lever member 29 is also distanced from the handle-side gear 24 and the drum-side gear 25, and therefore the interlocking gear 31 is not meshed with either the handle-side gear 24 or the drum-side gear 25. It abuts a portion of the locking member 35 near the pivot portion.

In this state, when the handle is rotated clockwise to close the window, the pull gear 26, which is constantly connected to the handle gear 25, rotates. As a result, the lever member 29 pivots due to friction with the side surface of the pulling gear 26, causing the interlocking gear 31 to mesh with both the handle-side gear 25 and the drum-side gear 24. As the lever member 29 pivots, its pivoting end 29B engages the locking member 3.
5 into the recess 39. Since the locking member 35 is pressed against the pivoting end portion 29B by the spring 38, this locking member maintains the meshing state between the interlocking gear 31 and both the handle-side gear 25 and the drum-side gear 24. become. This condition is achieved by an initial small angular rotational movement of the handle.

As a result, the handle-side gear 25 and the drum-side gear 24 are connected via the interlocking gear 31. A one-way clutch provided within the interlocking gear 31 also acts to prevent the interlocking gear 31 from reversing the handle gear 25. On the other hand, pulling gear 2
6 also rotates together with the handle-side gear 25, but the interlocking gear 31 is held in mesh with the handle-side gear 25 and the drum-side gear 24 by the locking member 35, and the lever member cannot pivot any further. Therefore, when a slightly larger rotational force than the initial rotational force is applied to the handle, the side surface of the pulling gear 26 will slide on the side surface of the lever member 29.

Note that when the handle is rotated counterclockwise, the pulling gear 26 rotates clockwise accordingly. At this time, since the side surface of the shear gear rotates while sliding on the surface of the lever member, the lever member does not pivot, and therefore the rotational force of the handle is not transmitted to the drum. In this way, even if the handle is rotated counterclockwise, it will have no effect on the drum.

In order to open the window, when the upper end of the push button member 41 that protrudes from the handle box is pushed down, the lower end 41 of the push button member 41 has a conical shape.
A pushes the upper thick part of the locking member 35 outward. This allows the pivoting end 29B of the lever member 29 to
comes out of the recess 39 of the locking member 35. As a result, the lever member 29 is unlocked and the pivoting end portion 29A of the lever member 29 is moved away from both the handle-side gear 25 and the drum-side gear 24. Along with this, interlocking gear 3
3 also comes out of the meshing state with both gears 24 and 25. Therefore, the ratchet mechanism for the drum side gear 24 is also released. This allows drum 2
0 can freely rotate in the direction in which the rope is sent out.

(Effects of the Invention) In the window opening/closing device of the present invention, the rotating shaft of the drum and the rotating shaft of the handle are coaxially provided, and the handle-side gear and the drum-side gear are arranged adjacent to each other in an overlapping state. Therefore, the handle box does not become large as a whole.

In addition, a one-way clutch is built into the second rotation means that acts as a clutch mechanism that connects the handle and the drum, and this one-way clutch acts as a ratchet mechanism that prevents the drum from reversing, so both mechanisms are reliably interlocked. The relationship is achieved at the same time that the clutch mechanism connects the handle and the drum and the ratchet mechanism locks the drum. Therefore, there is no risk of the handle being reversed as in the conventional case. In addition, since the movement of moving the first rotating member closer to or away from the handle and the rotating shaft of the drum is achieved by a lever member that pivots in conjunction with the rotational movement of the handle, the rotation angle until the two engage is small, and compared to conventional Compared to conventional drums, the time from when you start rotating the handle until the drum actually rotates is shorter.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a typical window opening/closing device applied to an outward-folding window, FIGS. 2 and 3 are perspective views showing the internal structure of a handle box used in a conventional window opening/closing device, and FIG. Figures 4 and 5 are perspective views of the internal structure of the handle box used in the window opening/closing device of the present invention, viewed from both sides, and Figure 6 is an exploded view of a portion of the structure shown in Figures 4 and 5. ,
FIG. 7 is a plan view of the handle box shown in FIGS. 4 and 5. FIG. 1...Handle box, 2, 11, 22...
Handle, 3...Push button member, 4, 10, 2
0... Drum, 5, 12, 24... Drum side gear, 13, 25... Handle side gear.

Claims (1)

[Claims] 1. A drum for winding up a rope with one end attached to a window, a winding handle, a transmission means for transmitting the rotational force of the winding handle to the drum, and a ratchet means for preventing the drum from reversing when winding the rope. In a window opening/closing device comprising: a means for engaging the ratchet means with the drum; and a means for disengaging the ratchet means from the drum; The transmission means comprises a first pivotable member disposed coaxially and normally in a non-interlocking manner, the transmission means simultaneously engaging both rotating shafts, and the ratchet means disposed within the first rotating member. a second rotating member, the engagement means being permanently connected to the rotating shaft of the handle; a side surface of the second rotating member; a lever member that slides and frictionally engages with the lever member; the first rotating member rotatably attached to the pivoting end of the lever member; and the first rotating member and both shafts of the handle and the drum are engaged with each other. means for locking the lever member so that it is held in position, said release means being attached to a pivoting end of said lever member to move said pivoting end away from both said handle and drum shafts. and means for unlatching said lever member to move the pivoting end of said lever member away from said handle and drum shafts. Window opening/closing device.