JP2807422B2 - Safety device for electric shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for use in stopping a descent of an electric shutter when there is an obstacle during the descent.

[0002]

2. Description of the Related Art As a safety device of this type, an obstacle is detected by using radio waves or light, or an obstacle is detected by switches that are switched by touching the obstacle, and the detection signal is transmitted. In some cases, the lowering of the shutter is stopped by transmitting it to a shutter driving device.

[0003]

However, in the above-mentioned conventional safety device for an electric shutter, a malfunction or a malfunction may occur due to a trouble of an electric system or the like. The task was to solve it.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and realizes reliable operation by mechanically transmitting detection of an obstacle to a shutter descent stop switch. An object of the present invention is to provide a safety device for an electric shutter that can be used.

[0005]

According to a first aspect of the present invention, there is provided a safety device for an electric shutter, wherein a movable seat plate is provided below a fixed seat plate constituting the lowermost stage of the shutter so as to be vertically movable. In the vertical frame that guides the side of the shutter, a linear member whose upper end is connected to the operating part of the shutter descent stop switch is provided over the vertical frame, and the fixed seat plate moves forward and backward toward the linear member. A pressing member freely held and a receiving portion for sandwiching the linear member between the pressing member are provided, and any one of the fixed seat plate and the movable seat plate can be provided within a vertical movement range of the movable seat plate with respect to the fixed seat plate. On one side, an inclined guide portion is provided which slidably engages with the pressing member and moves the pressing member forward and backward with the vertical movement of the movable seat plate with respect to the fixed seat plate. And slidably engage Which has a longer vertical dimension than the operating stroke of the terpolymer lowering stop switch a configuration in which a vertical guide portion for holding the pressing member in the forward position,
According to a second aspect of the present invention, the receiving portion is a second pressing member which is movable back and forth toward the linear member and engages with the second inclined guide portion and the vertical guide portion. The shape member is configured as a ball chain having balls at regular intervals, and as a fourth aspect, the fixed seat plate is provided with a stopper protruding to a height near the lower end portion of the movable seat plate. The configuration is a means for solving the problem.

[0006]

In the safety device for an electric shutter according to the first aspect of the present invention, when the movable seat plate comes into contact with an obstacle while the shutter is being lowered, the fixed seat plate is prevented from being lowered. Keeps falling. At this time, between the movable seat plate and the fixed seat plate, the pressing member moves forward with respect to the linear member by the inclined guide portion, and the linear member is sandwiched between the pressing member and the receiving portion. When the fixed seat plate further descends, the pressing member is held at the forward position by the vertical guide portion of the movable seat plate, so that the linear member is pulled down. As a result, the operating portion of the shutter descent stop switch is pulled. The switch is activated, and the lowering of the shutter stops.

In the safety device performing such an operation,
An inclined guide portion and a vertical guide portion are provided in which the pressing member is slidably engaged within a vertical movement range of the movable seat plate with respect to the fixed seat plate. Longer than
The shutter descent stop switch works before the engaging portion of the pressing member to the vertical guide reaches the lower end of the vertical guide, that is, in a state where the vertical movable range is left between the fixed seat plate and the movable seat plate. The lowering of the shutter is stopped only by giving the weight of the movable seat plate to the obstacle.

In the safety device for an electric shutter according to claim 2 of the present invention, two pressing members are used for the linear member, so that the distance between both pressing members and the linear member is normally increased. In the safety device for the electric shutter according to the third aspect of the present invention, the ball chain is adopted as the linear member, so that the ball is engaged with the pressing member and the receiving portion, so that the pinched state is improved. In the safety device for an electric shutter according to claim 4 of the present invention, the stopper comes into contact with the ground after the movable seat plate comes into contact with the ground in a normal state,
The shutter is stopped at the closed position without activating the safety device.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the safety device for the electric shutter according to 3 and 4 will be described.

The electric shutter shown in FIGS.
A case 3 including a shutter 1 formed by rotatably connecting a plurality of slats 1a to each other, and accommodating the shutter 1 in a wound state between upper ends of vertical frames 2 and 2 for guiding both sides of the shutter 1. It has. In the case 3, as shown in FIG. 14, a drum 4 to which the upper end of the shutter 1 is connected is rotatably supported by a horizontal shaft 5 and a balance spring 6. In addition, the drum 4 is driven to rotate. It houses a motor, a power transmission device, and a control device for an electric system.

The cross section of the case 3 is composed of an upper front spar 3a and lower front and back lintels 3b-3.
d, upper and front shield plates 3e to 3g, an intermediate lintel 3h which forms a feed-out opening of the shutter 1 together with a lintel 3b in a lower front portion, and between the intermediate lintel 3h and the lintel 3d in the lower rear portion. It is configured to include the provided maintenance lid 3i.

The safety device for the electric shutter is shown in FIGS.
As shown in FIG. 4, a movable seat plate 8 is provided below the fixed seat plate 7 constituting the lowermost stage of the shutter 1 so as to be movable up and down. A linear member (ball chain 11) connected to the operating portion (operating plate 10) of the switch 9 is provided over the vertical frame 2, and is held by the fixed seat plate 7 so as to be able to advance and retreat toward the linear member 11. A pressing member 12 and a receiving portion 13 for sandwiching the linear member 11 between the pressing member 12 are provided, and are fixed to the movable seat plate 8 by slidably engaging the pressing member 12 up and down. A vertical guide portion 14 is provided for determining the vertical movement range of the movable seat plate 8 with respect to the seat plate 7.

Each of the fixed seat plate 7 and the movable seat plate 8 is a long hollow material substantially equal to the length of the slat 1a. As shown in FIG. The movable seat plate 8 has an inward hook 7a at the opening end.
Has an outwardly extending hook 8 at the upper end fitted into the fixed seat plate 7.
a, 8a. The movable seat plate 8 has a fixed seat ranging from a lowered position where the hook portion 8a is locked to the hook portion 7a of the fixed seat plate 7 to a raised position where the upper end portion is brought into contact with the partition 7b in the fixed seat plate 7. It is vertically movable with respect to the plate 7. The movable seat plate 8 has flange portions 8b, 8b protruding on both inside and outside of the shutter 1, and has a cushion 15 on its lower surface which comes into contact with the ground.

The shutter lowering stop switch 9 is provided on the intermediate lintel 3h constituting the case 3, and is mounted with the switch button 9a protruding from the rear side of the shutter. Working plate 1
0 is operated. The shutter lowering stop switch 9 does not hinder the operation of the motor that drives the shutter 1 when the switch button 9a is pressed, and stops the motor when released.

The operating plate 10 is provided with a hinge 1 at an intermediate lintel 3h.
6 and a torsion coil spring 17
4 urges the hinge 16 in the clockwise direction in FIG. 4 and maintains the state in which the switch button 9a is pressed.

The linear member is a ball chain 11 provided with balls at regular intervals.
As shown in FIGS. 5 and 6, an appropriate position of the upper end is inserted into an L-shaped groove 10 a formed in the upper end of the operation plate 10 to be in an engaged state, so that there is no useless slack. Is connected to a bracket 18 provided at the lower end of the vertical frame 2.

The pressing member 12 has an engaging pin 12a as shown in FIG. 7, and is provided on a holding block 19 attached to the end of the fixed seat plate 7. Long hole 19 in the direction
The pin 12a is slidably engaged with the pin a so that the pin 12a can move forward and backward toward the ball chain 11. On the other hand, the receiving portion 13 is integrally formed in the holding block 19 at a position facing the pressing member with the ball chain 11 therebetween.

The guide portion 14 is formed in a groove shape on a guide plate 20 fixed to the end of the movable seat plate 8, and has an upper inclined guide portion 14a and a lower vertical guide portion 14b continuously. The vertical guide portion 14b is bent as shown in FIG.
Has a vertical dimension H longer than the operation stroke S of the shutter descent stop switch 9 shown in FIG. 1, and in a state viewed from the front as shown in FIG. The guide portion 14a extends to the opposite side of the receiving portion 13. The pin 12a of the pressing member 12 is slidably engaged with the guide portion 14.

As a result, the guide portion 14 provided on the movable seat plate 8 is connected to the pin 12 of the pressing member 12 provided on the fixed seat plate 7 side.
a, the vertical movement range of the movable seat plate 8 with respect to the fixed seat plate 7 is determined.
And the vertical movement range of the movable seat plate 8 with respect to the fixed seat plate 7 are substantially the same, and the movable seat plate 8 is at the lowest position with respect to the fixed seat plate 7 and a pressing member is provided at the upper end of the inclined guide portion 14a. In a state where the 12 pins 12a are engaged,
The pressing member 12 is held at a retracted position with respect to the ball chain 11.

The safety device for the electric shutter is
The fixed seat plate 7 is provided with a stopper 21 projecting downward to a height near the lower end of the movable seat plate 8. The stopper 21 is mounted between the fixed seat plate 7 and the holding block 19, and has an opening 21a for preventing interference with the guide plate 20 when the safety device is operated. Then, the movable seat plate 8 comes into contact with the ground following contact with the ground.

In the safety device for an electric shutter having the above structure, the shutter 1 is moved up and down by forward and reverse rotation of the drum 4, and when the movable seat plate 8 comes into contact with an obstacle while the shutter 1 is moving down, an obstacle is generated. The fixed seat plate 7 continues to lower together with the shutter 1 in a state where the movable seat plate 8 is prevented from lowering by an object.

At this time, the safety device causes relative movement between the movable seat plate 8 and the fixed seat plate 7, and the tilt guide portion 14a on the movable seat plate 8 side causes the pin 12a to move.
The pressing member 12 on the side of the fixed seat plate 7 engaged with the ball chain 11 advances with respect to the ball chain 11, and clamps the ball chain 11 between the pressing member 12 and the receiving portion 13.

When the fixed seat plate 7 is further lowered,
As shown in FIGS. 8 to 10, the pressing member 12 is held at the advanced position by the vertical guide portion 14 b, so that the ball chain 11 in the sandwiched state is pulled down. As a result, the virtual line in FIG. As shown in the figure, the operation plate 10 of the shutter lowering stop switch 9 is pulled, and the switch button 9a
The switch 9 operates to stop the shutter 1 from lowering.

In the safety device performing such an operation,
In the vertical movement range of the movable seat plate 8 with respect to the fixed seat plate 7, an inclined guide portion 14a and a vertical guide portion 14b with which the pressing member 12 is slidably engaged are provided. Since the operation stroke S of the shutter lowering stop switch 9 is longer than the operation stroke S, the pin 12a, which is the engagement portion of the pressing member 12 with the guide portion 14, reaches the lower end of the vertical guide portion 14b, that is, the fixed seat plate 7
The shutter lowering stop switch 9 operates in a state where the upper and lower movable ranges are left between the movable seat plate 8 and
The lowering of the shutter 1 is stopped only by giving the weight of the movable seat plate 8 to the obstacle.

If the obstacle is removed, the movable seat plate 8
Is lowered by its own weight, and the pressing member 12 retreats due to the lowering of the guide portion 14 to release the pinching of the ball chain 11, and the operation plate 10 is returned to the switch button pressing position by the action of the torsion coil spring 17. At the same time, the ball chain 11 is pulled up.

The shutter lowering stop switch 9 is
Not only can the descent be stopped at the time of operation, but it is also possible to add a function to turn on the ascent switch at the same time. In addition, the descent is automatically restarted when returning from removal of obstacles Alternatively, it is possible to reset by another switch while maintaining the stopped state.

In the safety device of the electric shutter, the stopper 21 normally comes into contact with the ground immediately after the cushion 15 of the movable seat plate 8 comes into contact with the ground, and a switch mechanism or the like detects this state. The motor is stopped, and the lowering of the shutter 1 is stopped without operating the safety device, so that movement such as movement of the pressing member 12 or pinching of the ball chain 11 is not performed unnecessarily. .

FIG. 15 shows the first, third and fourth aspects of the present invention.
FIG. 7 is a view for explaining another embodiment of the safety device for the electric shutter according to the present invention.

In this embodiment, the fixed seat plate 3 which is a hollow material is used.
7, a block-shaped receiving portion 33 is fixed, and an opposing block-shaped pressing member 32 is slidably inserted in the receiving portion 33, and a fixed seat plate is provided at a position between the receiving portion 33 and the pressing member 32. By passing the ball chain 11, which is a linear member, through the openings 37 a, 37 a formed above and below the 37, the pressing member 32 is held so as to be able to advance and retreat toward the ball chain 11.

Further, the pressing member 32 has a notch 32a which is opened on the rear side in the vertical and rear directions, and
After the guide plate 30 described later is mounted, the engagement pin 31 is inserted and inserted from the side of the guide plate 30 into the notch 32a.

The guide plate 30 is provided with an inclined guide portion 14a.
And a vertical guide portion 14b comprising a long hole having a vertical guide portion 14b on the lower side, and is inserted from below into other openings 37b, 37b formed above and below the fixed seat plate 37. , Is also inserted into the notch 32a of the pressing member 32. Then, the pressing member 32 and the guide plate 30 are engaged with each other by passing the engaging pin 31 through the guide portion 14. At this time, the engagement pin 31 is vertically movably engaged with the guide portion 14.

In the above configuration, when the movable seat plate (not shown) is raised with respect to the fixed seat plate 37, the inclined guide portion 14 provided on the guide plate 30 which rises with the movable seat plate.
a, the pressing member 32 advances, the ball chain 11 is sandwiched between the pressing member 32 and the receiving portion 33, and the pressing member 32 is held at the advanced position by the vertical guide portion 14b. 11 is maintained. In other words, when the movable seat plate comes into contact with the obstacle while the shutter 1 is descending, the same operation and effect as those of the previous embodiment can be obtained.

FIG. 16 shows the first, third and fourth aspects of the present invention.
FIG. 10 is a view for explaining still another embodiment of the safety device for the electric shutter according to the present invention.

In this embodiment, the fixed seat plate 4 which is a hollow material is used.
7, a movable seat plate 48 made of an upwardly opened member is vertically movably mounted.
On the lower side, a block-shaped pressing member 42 is provided in the movable seat plate 48 in the same manner as the block-shaped receiving portion 43. The pressing member 42 has a ridge 4 formed on the upper part thereof.
By engaging the groove 2 a with the groove 47 a formed on the lower surface of the fixed seat plate 47, it is held movably toward the receiving portion 43.

On the side of the movable seat plate 48, there is formed a slot-shaped guide portion 14 having an upper inclined guide portion 14a and a lower vertical guide portion 14b continuously. , An engagement pin 42b provided on the side of the pressing member 42 is slidably engaged. Further, openings 47b and 48a are formed in the fixed seat plate 47 and the movable seat plate 48 between the receiving portion 43 and the pressing member 42 for passing the ball chain 11 which is a linear member.

In the above configuration, when the movable seat plate 48 is raised with respect to the fixed seat plate 47, the pressing member 42 advances by the inclined guide portion 14a of the movable seat plate 48, and the pressing member 42, the receiving portion 43 Further, the ball chain 11 is sandwiched therebetween, and the pressing member 42 is held at the forward position by the vertical guide portion 14b, and the sandwiched state of the ball chain 11 is maintained. That is, when the movable seat plate 48 comes into contact with an obstacle while the shutter 1 is descending, the fixed seat plate 4
When 7 moves down, the same operation and effect as in the previous embodiment can be obtained.

FIG. 17 shows the first, third and fourth aspects of the present invention.
FIG. 10 is a view for explaining still another embodiment of the safety device for the electric shutter according to the present invention.

In this embodiment, a movable seat plate 58 is mounted below the fixed seat plate 57 made of a member opened downward so as to be vertically movable while being fitted into the fixed seat plate 57. The block-shaped receiving portion 5 is provided on the side of the fixed seat plate 57.
3, a block-shaped pressing member 52 is provided. The pressing member 52 is provided with an engaging pin 52a.
The pin 52a is slidably engaged with the pin.

In this embodiment, the inclined guide portion 14a is formed on the side of the fixed seat plate 57, and the vertical guide portion 14a is formed.
b is formed so as to be continuous with the end of the elongated hole 58a of the movable seat plate 58. Further, an oval bulging portion 52b slidably engaging with the inclined guide portion 14a is formed at the base of the pin 52a of the pressing member 52. That is, in this embodiment, the pressing member 52 is held by the elongated hole 58a of the movable seat plate 58 and the inclined guide portion 14a of the fixed seat plate 57 so as to be able to advance and retreat toward the receiving portion 53.

In the above configuration, when the movable seat plate 58 is raised with respect to the fixed seat plate 57, the pressing member 52 advances by the inclined guide portion 14a of the fixed seat plate 57, and the pressing member 52 and the receiving portion 53 The ball chain 11, which is a linear member, is held between the movable seat plate 58, the pressing member 52 is held at the forward position by the vertical guide portion 14b of the movable seat plate 58, and the held state of the ball chain 11 is maintained. It is. That is, while the shutter 1 is descending, the movable seat plate 5
When the fixed seat plate 57 descends when the abutment 8 comes into contact, the same operation and effect as those of the previous embodiment can be obtained.

FIG. 18 is a view for explaining an embodiment of a safety device for an electric shutter according to claim 2 of the present invention.

In this embodiment, a movable seat plate 68 is mounted below the fixed seat plate 67 made of a member opened downward so as to be vertically movable while being fitted into the fixed seat plate 67. , A block-shaped pressing member 62 and a second block-shaped pressing member 7 instead of the receiving portion are provided on the side of the fixed seat plate 67.
2 are provided. Both pressing members 62 and 72 are fixed seat plate 6.
7 is slidably engaged with a groove 67a in the left-right direction of the shutter formed on a side portion of the shutter 7, and is held so as to be able to approach and separate from each other with the ball chain 11, which is a linear member, interposed therebetween.

The movable seat plate 68 has two pressing members 6.
2 and 72, two guide portions 1 having an upper inclined guide portion 14a and a lower vertical guide portion 14b continuously.
4 and 14 are formed in a symmetrical arrangement.
Then, engagement pins 62a, 72a provided on both pressing members 62, 72 are slidably engaged with each other through an elongated hole 67b formed in the groove 67a.

In the above-described configuration, when the movable seat plate 68 is raised with respect to the fixed seat plate 67, each of the pressing members 62 and 72 is advanced in a direction approaching each other by the respective inclined guide portions 14a of the movable seat plate 68. The ball chains 11 are sandwiched between the pressing members 62 and 72, and the pressing members 62 and 72 are held at the forward position by the respective vertical guide portions 14b, and the sandwiched state of the ball chains 11 is maintained.

That is, when the movable seat plate 68 comes into contact with an obstacle while the shutter 1 is descending, the same operation and effect as in the previous embodiment can be obtained when the fixed seat plate 67 descends. In addition, two pressing members 62 and 72
, The pressing members 6 in the normal state
A large distance between the ball chains 2 and 72 and the ball chain 11 can be obtained.

[0046]

As described above, according to the safety device for the electric shutter according to the first aspect of the present invention, the detection of an obstacle can be transmitted to the shutter descent stop switch mechanically and in a short time. Yes, only the weight of the movable seat plate is given to obstacles, and the lowering of the shutter can be stopped quickly and reliably without giving the weight of the shutter to the obstacles, and extremely high safety can be obtained. Can be.

According to the safety device for the electric shutter according to the second aspect of the present invention, by employing two pressing members, it is possible to obtain a large distance between the pressing members and the linear member in a normal state. By making the two not unnecessarily in contact with each other, it is possible to prevent wear and the like of each component, and to thereby improve durability.

According to the safety device for the electric shutter according to the third aspect of the present invention, the ball member is adopted as the linear member, so that the sandwiching state of the linear member can be further ensured. Thus, the reliability of operation can be further improved.

According to the safety device for the electric shutter according to the fourth aspect of the present invention, the stopper that contacts the ground can
Normally, each component of the safety device does not operate unnecessarily, so that it is possible to prevent the abrasion of each component and improve the durability, and to maintain a safe and reliable function for a long time. be able to.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a safety device for an electric shutter according to an embodiment of the present invention, in a partially broken state, for explaining one embodiment.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a vertical sectional view of a lower portion of a shutter when the shutter is closed.

FIG. 4 is a vertical sectional view of an upper portion of a shutter.

FIG. 5 is a horizontal sectional view of an upper portion of a shutter.

FIG. 6 is a front view near a shutter lowering stop switch.

FIG. 7 is a perspective view showing an operating mechanism portion of the pressing member in an exploded state.

FIG. 8 is a front view of a main part showing a state where the safety device is operated.

9 is a cross-sectional view taken along line BB in FIG.

FIG. 10 is a sectional view taken along line CC in FIG. 8;

FIG. 11 is a front view showing an inside view of the electric shutter.

FIG. 12 is a sectional view taken along line EE in FIG. 11;

FIG. 13 is a sectional view taken along the line DD in FIG. 11;

FIG. 14 is a vertical sectional view of a case portion above a shutter.

FIG. 15 is an exploded perspective view showing an essential part of another embodiment of the safety device for an electric shutter according to the first, third and fourth aspects of the present invention.

FIG. 16 (a) is a perspective view showing a main part and FIG. 16 (b) is a perspective view showing a pressing member in still another embodiment of the safety device for an electric shutter according to claims 1, 3 and 4 of the present invention.
It is.

FIG. 17 is a perspective view showing a main part of still another embodiment of the electric shutter safety device according to claims 1, 3 and 4 of the present invention.

FIG. 18 is a perspective view showing a main part of an embodiment of a safety device for an electric shutter according to claim 2 of the present invention.

[Explanation of symbols]

Reference Signs List 1 shutter 2 vertical frame 7 37 47 57 67 fixed seat plate 8 48 57 68 movable seat plate 9 shutter descent stop switch 10 operating plate (operating portion) 11 ball chain (linear member) 12 32 42 52 62 pressing member 13 33 43 53 Receiving part 14a Inclined guide part 14b Vertical guide part 21 Stopper 72 Second pressing member

Continued on the front page (72) Inventor Seiichi Miyahara 1-1-14-5 Yotsui, Fukui City, Fukui Prefecture Toko Shutter Co., Ltd. (58) Field surveyed (Int.Cl. ⁶ , DB name) E06B 9/80

Claims (4)

(57) [Claims] A movable seat plate is provided vertically below a fixed seat plate constituting a lowermost stage of a shutter, and a shutter lowering stop switch is provided at an upper end portion in a vertical frame for guiding a side portion of the shutter. A linear member connected to the operating portion of the vertical frame is provided above and below the vertical frame, and the linear member is sandwiched between the pressing member held on the fixed seat plate so as to be able to advance and retreat toward the linear member, and the pressing member. A receiving portion to be attached to the fixed seat plate, wherein the fixed seat plate is slidably engaged with one of the fixed seat plate and the movable seat plate in a vertical movement range with respect to the fixed seat plate with respect to the pressing member; The movable guide plate is provided with an inclined guide portion for advancing and retreating the pressing member in accordance with the vertical movement of the movable seat plate. With long vertical dimension A safety device for an electric shutter, comprising a vertical guide portion for holding a pressing member at a forward position. 2. The receiving device according to claim 1, wherein the receiving portion is a second pressing member that is movable back and forth toward the linear member and engages with the second inclined guide portion and the vertical guide portion. A safety device for the electric shutter as described. 3. The safety device for an electric shutter according to claim 1, wherein the linear member is a ball chain provided with balls at regular intervals. 4. The safety device for an electric shutter according to claim 1, wherein a stopper protruding to a height near a lower end of the movable seat plate is provided on the fixed seat plate.