JPH0581710B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a door closer for a sliding door that automatically closes a sliding door that can be opened and closed via a long body.

(Prior art) One type of door closer that automatically closes an open sliding door is one that stores a spring such as a spring in conjunction with the opening operation of the sliding door, and uses the stored force of this spring to close the sliding door. There is. This door closer is
It is fixed to a sliding door or a sliding door frame, and the elongated body pulled out from the sliding door is connected to the sliding door frame or sliding door (see Japanese Patent Application Laid-open No. 63-502043 and Japanese Utility Model Application No. 61-155906).

For example, the door closer proposed in Japanese Patent Application Laid-Open No. 63-502043 uses constant torque,
When the sliding door is opened, the cable is unwound from the winding drum and the entire cable is stored. When the action of opening the sliding door is stopped, the winding drum winds up the cable and moves the cable in the direction of closing the sliding door using the entire stored force. The rotation speed of the winding drum as it rotates in the direction of winding the cable is controlled by a governor mechanism, and by adjusting the winding speed of the cable, the sliding door can be closed at a substantially constant speed. It's summery.

(Problems to be Solved by the Invention) Although the door closer using the constant torque described above has the advantage that the force for opening the sliding door is approximately constant regardless of the degree of opening of the sliding door, it has the following problems. I'm leaving it behind. This is because when an open sliding door is forcibly closed at a speed faster than the closing speed due to full movement, the winding speed of the cable by the winding drum is not fast enough, the cable becomes slack, and the winding operation to the winding drum is delayed. This can lead to problems such as the door closer not working properly or getting caught on some member, which can lead to the door closer losing its own function.

An object of the present invention is to provide a door closer for a sliding door that is configured so that the elongated body does not become loose even when the sliding door is forcibly closed at a high speed.

(Means for Solving the Problems) The door closer for sliding doors of the present invention includes a winding drum having one end of a long body fixed and on which the long body is unwound and freely wound; A door closer main body which is fixed to a sliding door or a sliding door frame, and a storage means that gives a habit of winding the elongated body around the drum, and a door closer body which is pulled out from the door closer body and whose other end is attached to the sliding door frame or sliding door. In a sliding door closer comprising an elongated body that is connected and fixed, the elongated body is provided with the other end of the elongated body or the winding drum, and tensions the elongated body with a force weaker than the winding tendency of the energy accumulating means. It is characterized by being equipped with a long body slack absorption mechanism that provides.

(Function) When the sliding door is opened, the elongated body is unwound from the winding drum while being rotated. The rotating winding drum stores energy in the energy storage means. When the force to open the sliding door is cut off, the winding drum in which energy is stored rotates to wind up the elongated body and move the sliding door in the direction of closing. The rotation of the winding drum at this time is controlled to a constant speed by the operation of a governor mechanism.
When the sliding door is forcibly closed at a speed faster than the winding operation by the winding drum, the elongated body slack absorption mechanism is activated to wind up the elongated body and apply tension to the elongated body to absorb the slack. .

(Example) Hereinafter, the present invention will be described in detail based on the illustrated example.

In FIG. 1, a sliding door 1 is suspended from a rail 3 provided on a sliding door frame 2 so as to be openable and closable. In this embodiment, the door closer 4 includes a door closer body 5 fixedly supported on the sliding door 1.
and a long body slack absorbing mechanism 40 connected to the other end of a cable 6 as a long body pulled out from the main body and fixed to the sliding door frame 2. The sliding door 1 shown in FIG. 1 is shown in a state where it has been pushed in the direction of the arrow and has been opened to some extent from the closed position.

2 and 3, the structure of the door closer 4 will be explained. Inside the case 7, which has the attachment part 7a to the sliding door frame 2, are a winding drum 8 on which the cable 6 is unwound and freely wound, a Zenmai take-up spool 10, a Zenmai winding spool 9, and both spools. A constant torque Zenmai 11 and a worm 12 are fixed at both ends of the
A speed increasing gear train 13 having a final stage, a spring clutch 14 provided in this gear train, and a worm 1
Governor mechanisms 15 including 2 are respectively disposed.

The cable 6 is drawn into the case via guide rollers 16, and one end thereof is fixed to the winding drum 8. The winding drum 8 has a support shaft 17
is rotatably supported by the case 7 by
A gear portion 8a is formed at one end. A small-diameter tooth portion 18a of the gear 18 meshes with the gear portion 8a. The large-diameter tooth portion 18b of the gear 18 meshes with a gear portion 9a formed on the end surface of the fully wound upper spool 9. The gear 18 is supported by the case 7 by a support shaft 19. The Zenmai winding spool 9 is attached to the support shaft 20
is rotatably supported by the case 7, and the sliding door 1
When the winding drum 8 is opened, it is rotated in conjunction with a winding drum 8 which is rotated by a cable 6 to wind up the winding drum 11 with a constant torque. The constant torque Zenmai 11 has a habit of being wound up on the Zenmai take-up spool 10, and is wound on the Zenmai take-up spool 10 when the sliding door is closed, and the spool 10 when the sliding door is opened. It is starting to unravel from the beginning. The full take-up spool 10 is rotatably supported by the case 7 by a support shaft 24.

A recess 8c is formed in the other end surface of the winding drum 8, into which a metal cup 21 is integrally fitted. A protrusion 22a of a gear 22 forming the starting end of the speed increasing gear train 13 is fitted into the recess 8c. A proximal end portion of a coil spring 23, which has a tendency to expand in the radial direction, is locked to this protrusion 22a. The free end of the coil spring 23 is brought into contact with the inner peripheral surface of the cup 21. The spring clutch 14 is composed of the cup 21, the protrusion 22a, and the coil spring 23, and when the winding drum 8 rotates in the cable unwinding direction indicated by the arrow opposite to arrow a, the coil spring 23 is tightened. In particular, when the drum rotates in the cable winding direction shown by arrow a without transmitting the rotation of the drum to the gear 22, the coil spring 23
The rotation of the drum is transmitted to the gear 22 by sliding in the direction of expanding the drum.

A large-diameter tooth portion 26a of a speed-increasing gear 26 rotatably supported by a case via a support shaft 25 meshes with the gear 22. The speed increasing gear 26 has a small diameter tooth portion 26b.
is formed. This tooth portion 26b is a worm wheel and meshes with the worm 12. The gear 22, the speed increasing gear 26, and the worm 12 constitute a speed increasing gear train 13. Warm 12 is
One end 12a thereof is rotatably supported by a bearing 27a, and the other end 12b is rotatably supported by a bearing 28. The bearing 27a is formed on the guide member 27 that prevents the cable 6 from moving around inside the case 7. The guide member 27 is fixed to the case 7, and a portion 27b thereof extends in the circumferential direction of the winding drum 8. The bearing 28 is fixed to the case 7, and fixedly supports a brake cup 29, which will be described later.

An example of the governor mechanism 15 will be explained with reference to FIGS. 4 to 6. A ratchet arm 30 whose movement in the axial direction and rotational direction is restricted is fitted into the large diameter portion 12c of the D-cut worm 12. The ratchet arm 30 is surrounded by ratchet teeth 31a of the adjustment member 31 and is given an expansion habit toward engagement with the teeth. The adjustment member 31 is rotatably inserted into the worm 12, and has a worm tooth portion 31b on its periphery, and an adjustment pin 31c extending in the axial direction on one end surface.
31c are formed respectively. Adjustment pin 3
Arc holes 32a, 32a (see FIG. 6b) formed in one end face of the weights 32, 32 are loosely fitted into the weights 1c, 31c, respectively. Warm 1
2, a support member 33 is attached to the end 12d of the small diameter portion.
are integrally fitted. This support member 33
is restricted from moving in the axial direction by a retaining ring 34, and the end of the boss portion and the ratchet arm 30
The movement of the adjustment member 31 in the axial direction is regulated by this. Weights 32, 3 are attached to the end surface of the support member 33.
Pins 33a, 33a are formed to fit into holes 32b, 32b formed on the other end surface of 2.
Further, a tooth portion 33b for stopping rotation is formed on the outer peripheral edge of the support member 33. weight 32,3
2 is made of synthetic resin or metal, and friction members 32c, 32c made of rubber or the like having a high coefficient of friction are fixed to the outer surface thereof. When the worm 12 rotates at a speed higher than a predetermined speed, the weights 32, 32 are swung out in the centrifugal direction by centrifugal force around the pins 31c, 31c as centers of swing, and the friction member 32
By rubbing the inner circumferential surface of the braking cup 29 with the arms c and 32c, the rotation of the worm, that is, the winding drum 8 rotatably connected thereto is braked. The weights 32, 32 are connected to pins 31c, 3 of the adjusting member.
The degree of swing can be adjusted by selecting the relative positions of 1c and the circular arc holes 32a, 32a.
This adjustment effect will be described later.

In FIG. 2, the structure of the elongated body slack absorption mechanism 40 will be explained. Inside the case consisting of a board 41 and a cover 42 fixed to the sliding door frame 2 is a stepped shaft 43.
A pulley 44 is rotatably provided at the small diameter portion of the pulley 44 . The substrate 41 and the cover 42 are integrated with each other by fixing pins 47. The other end of the cable 6 is connected and fixed to the pulley 44 . A coil spring 45 is disposed in an annular space formed by the recess of the pulley 44 and the stepped shaft 43. One end 45a of this coil spring 45 is engaged with a locking hole 41a formed in the substrate, and the other end 45b
is locked to a locking portion of the pulley 44. The coil spring 45 is similar to the spring 1 shown in FIG.
45, there is a bent part (symbol 14) in the center.
5c) and is engaged with a notch (see reference numeral 146a in FIG. 8) of the separator 46 to prevent interference (biting) of the coil portion during spring charging. The coil spring 45 is biased in the direction of winding the cable 6 and is locked to the pulley 44. The spring force stored in this coil spring 45 is set to be weaker than the cable winding behavior caused by the constant torque movement 11. Therefore, when the sliding door 1 is closed, that is, when the constant torque winding 11 is wound on the winding spool 10, the other end of the cable 6 is completely unwound from the pulley 44. In other words, when the sliding door is closed, the pulley 44 is rotated by the cable 6 and stores the coil spring 45. The cable 6 is unwound from the pulley 44 even when the sliding door is being closed by the stored force of the constant torque 11.

The sliding door closing speed adjusting mechanism will be explained with reference to FIGS. 2 to 4. An adjustment lever 36 is swingably supported on the case 7 by a support shaft 35.
An operating wheel 37 integrally formed with a worm portion 37a is rotatably supported by the adjustment lever 36. The worm part 37a is provided at a position where it can be engaged with and detached from the worm tooth part 31b of the adjustment member 31. The locking portion 36a at the bent tip of the adjustment lever 36 extends to a position where it can be engaged with and detached from the tooth portion 33b of the support member 33. The brake cup 29 is formed with a window hole 29a through which the locking portion 36a enters and exits. The adjustment lever 36 has a torsion spring 3
8 provides a rocking habit (see FIG. 3) in the direction of disengaging the worm portion 37a and the worm tooth portion 31b, and the locking portion 36a and the tooth portion 33b.

The operation of the embodiment configured as above will be explained.

When sliding door 1 is closed, constant torque Zenmai 1
1 is wound on a full-length take-up spool 10, and the cable 6 is wound on a take-up drum 8. Even in this state, the winding habit (see arrow a) due to the constant torque control 11 is acting on the winding drum 8. Further, the pulley 44 is rotated by the cable 6, so that the coil spring 45 is rotated by the cable 6.
is being stockpiled.

As shown in FIG. 1, when the sliding door 1 is opened, the cable 6 is unwound from the winding drum 8, and
Rotate in the direction opposite to arrow a (see Figure 3).
This rotation of the winding drum 8 is transmitted to the full-winding spool 9 via the gear 18, and the spool 9 is rotated in the full-winding upward direction shown by arrow b. When spool 9 rotates, all take-up spool 1
Constant torque Zenmai 1 which was wound up by its habit in 0
1 is wound onto the spool 9 as the sliding door is opened. The constant torque 11 wound up on the spool 9 is stored. On the other hand, the rotational force of the rotating winding drum 8 is applied to the spring clutch 14.
As the coil spring 23 is tightened, the transmission is not transmitted to the speed increasing gear train 13, so the governor mechanism 15 does not operate.

When the opened sliding door 1 is released from the opening operation, it begins to be wound onto the take-up spool 10 due to the constant torque 11 or its behavior. The rotation of the full winding spool 9, which rotates in the opposite direction to the arrow b, rotates the winding drum 8 in the direction of the arrow a through the gear 18.
Wind up cable 6. When the cable 6 is wound up, the door closer 4, ie, the sliding door 1, is guided by the rail 3 (see FIG. 1) and moved in the closing direction. The moving speed of the sliding door 1 moving in the closing direction becomes gradually faster as the total winding diameter of the full winding spool 10 increases. However, when the winding drum 8 rotates in the direction of arrow a, the cup 2
1 expands the coil spring 23 of the spring clutch 14, thereby integrating the gear 22 with the drum 8 and rotating it in the same direction. The rotation of the gear 22 is accelerated by the worm tooth portion 26b of the speed increasing gear 26 to rotationally drive the worm 12, causing it to rotate at a high speed. When the rotation of the worm 12 reaches a predetermined number, the weights 32, 32 are swung by centrifugal force, and the friction member 32c rubs against the inner peripheral surface of the braking cup 29, thereby applying a brake to the rotation of the worm. . The braking force applied to the worm 12 acts as a braking force on the winding drum 8 via the speed-increasing gear train 13, and brakes the rotational speed of the drum, that is, the winding speed of the cable 6. This applies a brake to the moving speed of the sliding door 1, which is currently moving. Therefore, the sliding door 1 closes at a slow speed controlled by the action of the cabana mechanism 15. When the sliding door 1 moves to the closed position, the Zenmai winding spool 9
Most of the constant torque winding 11 that was being wound up is now wound onto the winding spool 10.

Below, every time the sliding door 1 is opened, the constant torque is 11
is wound up on the Zenmai winding spool 9 and stored in energy, and when the opening operation of the sliding door is stopped, it is wound on the Zenmai winding spool 10 to rotate the winding drum 8 and the cable 6 Wind it up and move the sliding door toward the closed position.

Now, when the open sliding door 1 is rapidly moved in the closing direction, the cable 6 suddenly loosens as shown by the solid line in FIG. This cable 6 cannot be wound. However, when the sliding door is open, the stored force of the coil spring 45 is acting on the pulley 44, so the cable 6, which was slack as shown by the solid line, is moved by the pulley 44, which rotates with this stored force. It is then wound up and tension is applied as shown by the broken line. The closing speed of sliding door 1 is constant torque 1
1. If it is based on the original stored force, the pulley 4
Since the spring force of the coil spring 11 is greater than the spring force of the coil spring 46, the cable 6 that has been wound up on the winding drum 8 is wound up on the winding drum 8. When the cable wound around the pulley 44 is unwound, the pulley is rotated to bias the coil spring 45 in the cable winding direction.

In the first embodiment described above, the elongated body slack absorption mechanism is connected to the end of the cable drawn out from the door closer body, but the mechanism can also be incorporated into the door closer body. Next, a second embodiment of the present invention will be described. In addition, in the slack absorption mechanism 50 described below, members that perform the same or equivalent functions as the members already described are given the same reference numerals, and individual explanations are omitted.

7 and 8, a two-stage gear 58 is provided on the spindle 17 of the winding drum 8 adjacent to the drum 8.
is supported. Large diameter tooth portion 58a of two-stage gear
is meshed with the small diameter tooth portion 18a of the gear 18, and the small diameter tooth portion 58b is meshed with the clutch gear 126. One end of the coil spring 23 is locked to one end surface of the clutch gear 126. The other end of this coil spring 23 is in sliding contact with the inner peripheral surface of a sleeve formed at the end of the speed increasing gear 26, and when the winding drum 8 unwinds the cable 6, the gear 1
This constitutes a spring clutch that operates in a direction that does not transmit the rotation of 26 to the speed increasing gear 26. When the speed increasing gear 22 is made of resin, a metal cup is fixedly fitted onto the inner peripheral surface of the sleeve. On the opposing end surfaces of the winding drum 8 and the two-stage gear 58,
Recesses 8c and 58c are respectively formed, into which both ends of a coil spring 145 having a bent portion 145c in the center are fitted. One end 145a of the coil spring 145 is locked to a locking portion 58d of the gear 58, and the other end 145b is connected to the winding drum 8.
It is locked in the locking part of. A notch 146a of a separator 146 fitted to the support shaft 17 is engaged with the bent portion 145c of the spring. The coil spring 145 is energized in the cable winding direction (see arrow a in FIG. 3) in response to the winding behavior of the constant torque movement 11. The stored force of this coil spring 145 is set to be smaller than the stored force of the constant torque full swing 11. The other end 6a of the cable 6, whose one end is fixed to the winding drum 8, is fixed to the sliding door frame 2, as shown in FIG.

When the sliding door 1 is opened from the closed position shown by the chain line 1A in FIG. 10 to the open position shown by the solid line, the winding drum 8 moves in the direction of arrow a (see FIG. Rotate in the direction. At this time, the two-stage gear 58 also rotates in the same direction as the drum 8 via the coil spring 145. The rotation of the two-stage gear 58 is transmitted to the Zenmai hoisting spool 9 via the gear 18, and the constant torque Zenmai 11
Roll up and store power. When the force for opening the sliding door is released, the winding drum 8 rotating by the accumulated force of the constant torque 11 winds up the cable 6 and moves the sliding door 1 toward the closed position 1A. Now, if the opened sliding door 1 is rapidly moved in the closing direction, the cable 6 will suddenly become slack, and the winding drum 8, which is braked by the governor mechanism 15, cannot wind up the cable 6. However, since the stored force of the coil spring 145 is acting on the winding drum 8 when the sliding door is open, the cable 6
When the cable becomes slack, the drum 8 rotates faster than the two-stage gear 58 in the direction of the arrow a by this accumulated force, winds up the cable, and applies tension to it. When the sliding door 1 is closed, the winding drum 8 is stationary and the cable 6 is wound around it. After the sliding door is closed and the winding drum is stopped, the two-stage gear 58, which is receiving the winding behavior of the constant torque 11, is moved as shown by the arrow a.
The coil spring 145 is rotated in the direction of
to accumulate. The two-stage gear 58 is the coil spring 1
The phenomenon of winding up the sliding door also occurs when the action of forcibly closing the sliding door is stopped midway through. In this case, the two-stage gear 58 is rotated by the stored force of the constant torque 11, and the coil spring 14
After winding up the cable 5 and integrating the gear 58 and the winding drum 8, the drum is rotated to wind up the cable 6.

By the way, the closing speed of the sliding door 1 changes depending on the mass of the sliding door itself, the location where the sliding door is installed, etc. In order to cope with this, in the illustrated embodiment, the braking force of the governor mechanism 15 can be adjusted. In FIG. 5, when the weights 32, 32 swing in the centrifugal direction due to the centrifugal force accompanying the rotation of the worm, the adjustment pins 31c, 3
It swings around 1c. That is, by changing the position of the fulcrum relative to the center of gravity of the weights 32, 32, the timing at which the weights rub against the cup 29 can be changed. As shown in FIG. 4, the speed adjustment is carried out by pressing the operating wheel 37 protruding outside the case in the direction of the arrow to swing the adjusting lever 36 against the elasticity of the spring 38, and the tip of the lever 36 is engaged. The stop portion 36a is engaged with the tooth portion 33b of the support member 33, and the worm tooth portion 37a is engaged with the worm wheel portion 31b of the adjustment member 31. The support member 36 engaged with the locking portion 36a is
Rotation of the worm 12 and weight 32 is prevented. In this state, when the operating wheel 37 is rotated in an appropriate direction, the worm portion 37a rotates the adjustment member 31, and the adjustment pin 31c is inserted into the arc hole 32.
a to change the relative position between the center of gravity of the weight 32 and its center of rotation. After adjustment work,
When the pushing force to the operating wheel 37 is cut off, the adjustment lever 36
is returned to the original position shown in FIG. 3 by the elasticity of the spring 38.

Each of the embodiments described above is an example in which the door closer body 5 is fixed to the sliding door 1 and the end of the cable 6 is connected to the sliding door frame. Of course, it may be connected and fixed to the sliding door.

(Effects of the Invention) As described above, according to the present invention, a mechanism is provided that absorbs the slack of the elongated body that occurs when the sliding door is rapidly closed, so that the loosened elongated body does not wrap around any member. This eliminates the problem of not being able to reliably wind the material onto the winding drum.
Stable closing operation of the sliding door can be ensured.

[Brief explanation of the drawing]

Fig. 1 is a front view showing the position of a sliding door equipped with a sliding door closer according to a first embodiment of the present invention, Fig. 2 is a plan cross-sectional view showing an embodiment of the door closer of the present invention, and Fig. 3 is the same as above. 4 is a plan sectional view showing an example of the governor mechanism, FIG. 5 is a longitudinal sectional view of the same, FIG. 6 is an exploded perspective view of the governor mechanism, and FIG. A plan sectional view showing only the main parts of the embodiment,
Fig. 8 is an exploded perspective view showing an example of the elongated body slack absorption mechanism incorporated into the door closer body, Fig. 9 is a front view for explaining the state in which the elongated body is loosened, and Fig. 10 is the second embodiment. It is a front view showing the position of a sliding door provided with a door closer. 1... Sliding door, 2... Sliding door frame, 4... Door closer for sliding door, 5... Door closer body, 6... Long body, 8... Winding drum, 9... Zenmai winding spool, 10... Full winding spool, 11... constant torque full swing, 12... worm, 13... speed increasing gear train, 14... spring clutch, 15... governor mechanism, 40, 50... long body slack absorption mechanism .

Claims (1)

[Scope of Claims] 1. A winding drum to which one end of the elongated body is fixed and the elongated body is unwound and freely wound, and the elongated body is wound around the winding drum. A door closer body that is fixed to a sliding door or a sliding door frame, and a long body that is pulled out from the door closer body and whose other end is connected and fixed to the sliding door frame or sliding door. In the sliding door closer, the elongated body slack absorbing mechanism is provided on the other end of the elongated body or on the winding drum, and applies tension to the elongated body with a force weaker than the winding tendency of the energy accumulating means. A door closer for sliding doors.