JP2022010472A - Shielding device - Google Patents

Abstract

To provide a shielding device with improved shield moving-up or moving-down performance when the shield can be moved up and down by a drive force of a motor using a lifting cord.SOLUTION: An insulation device has a winding drum 51U or 51L, which winds up or feeds out a lifting cord 3U or 3L for moving a shield up or down by moving-up or -down operation of a rail (intermediate rail 7U or a bottom rail 7L) provided at a bottom edge of the shield (an upper screen 6U or a lower screen 6L), and a support member (a shaft case 50 and a shaft cover 53, and a cord exit member 54 that pivotally and rotatably supports pulleys 55, 56). A plurality of predetermined symmetric inclination angles enabling relocation in an installation direction are set for the pulley 55 or 56. The support member has a function (protrusion 53e) to limit a wound number of the lifting cord that can be wound by a steep slope face portion 51d unitarily of the winding drum 51U or 51L to predetermined smaller number or less and press and wind the lifting cord sequentially.SELECTED DRAWING: Figure 1

Description

The present invention relates to a shielding device capable of raising and lowering a shielding material.

Among the shielding devices that can raise and lower the shielding material, the electric shielding device typically rotates the drive shaft by the driving force of the motor and winds the elevating cord (including the string-shaped cord or the tape-shaped elevating tape). The shielding material can be raised and lowered by winding or rewinding with a take-up drum.

In such an electric shielding device, a motor is arranged in a head box, the rotation of the output shaft of the motor is transmitted to the drive shaft, and the shielding material is moved up and down based on the rotation of the drive shaft.

Further, an encoder for detecting the rotation speed and the amount of rotation of the drive shaft is arranged in the head box of the electric shielding device, and the speed and the number of pulses of the encoder pulse are counted based on the pulse signal output from the encoder. The value is controlled, and the rotation speed and the rotation amount of the motor are controlled by the control device arranged in the head box. By such an operation, the speed of raising and lowering the shielding material is appropriately adjusted, and the stop position of the raised and lowered shielding material is controlled.

On the other hand, in the manual shielding device, as a manual winding unit, each winding drum for winding or rewinding the elevating cords for raising and lowering the upper shielding material and the lower shielding material connected in the vertical direction is provided. A support member that rotatably supports is known (see, for example, Patent Documents 1 and 2).

In the manual shielding device disclosed in Patent Document 1, an insertion hole and an elevating cord are provided in a support member that rotatably supports a winding shaft (that is, a winding drum) for winding or rewinding the elevating cord. It constitutes a take-up unit provided with a slit-shaped guide portion for preventing irregular winding, and this slit-shaped guide portion uses an elevating cord inserted into the insertion hole from the lower side of the support member to the take-up drum. It is designed to guide you toward.

Further, in the manual shielding device disclosed in Patent Document 2, the base end of the take-up drum is attached to the shaft case (that is, the support member) of the take-up unit that rotatably supports the take-up shaft (that is, the take-up drum). A shaft cover is provided above the portion side, and in particular, the shaft cover disclosed in Patent Document 2 is a brake that prevents the weight of the rail provided at the lower end of the shielding material from dropping by imparting resistance to the movement of the elevating cord. It is designed to function as a mechanism. In addition, an example in which a pulley for guiding the hanging of the elevating cord for the upper shielding material from the winding drum is provided in the upper part of the insertion hole is shown below the shaft case disclosed in Patent Document 2, and the shaft of the pulley is shown. Is parallel to the axial direction of the take-up drum.

Japanese Patent No. 6282064 Japanese Unexamined Patent Publication No. 2019-85851

As described above, the electric cloaking device is typically capable of raising and lowering the cloaking material by rotating the drive shaft with the driving force of the motor and winding or rewinding the elevating cord with a take-up drum. There is.

Then, in the electric shielding device, it is possible in principle to divert the manual winding unit to the winding unit having a shaft case that rotatably supports each winding drum.

However, in the electric shielding device, the ascending / descending speed of the shielding material is generally suppressed to be lower than that in the case of the manual shielding device. This is because the electric shielding device may handle a shielding material that increases the operation load in the manual type, and the reduction of the motor load or the safety of the operation is taken into consideration.

Therefore, in the electric cloaking device, if the manual winding unit is diverted, various problems occur.

For example, when the manual winding unit disclosed in Patent Document 1 is applied to the electric shielding device, when the elevating cord for the upper shielding material is guided to the winding drum near the lower limit of the elevating of the upper shielding material. The load component on the partition wall that prevents random winding in the slit-shaped guide portion becomes so large that it cannot be ignored for low-speed descent operation, and the upper shielding material cannot sufficiently descend to the lower limit position of ascending / descending, resulting in the descent performance of the upper shielding material. Problems may occur.

Further, when the manual winding unit disclosed in Patent Document 2 is applied to the electric shielding device, when the elevating cord for the lower shielding material is guided to the winding drum near the lower limit of the elevating and lowering of the lower shielding material. The load component of the shaft cover (or pulley) becomes so large that it cannot be ignored for low-speed descent operation, and the lower shield material cannot be sufficiently lowered to the lower limit position of elevating and lowering, which causes a problem in the descent performance of the lower shield material. There is.

Further, when the manual winding unit disclosed in Patent Documents 1 and 2 is applied to the electric shielding device, each elevating cord by each winding drum is used during low-speed ascending driving of each of the upper shielding material and the lower shielding material. The cord slip is less likely to occur in the winding, and each of the upper shield material and the lower shield material rises jerkyly, which may cause a problem in climbing performance.

The above-mentioned problem is not limited to the electric shielding device that raises and lowers each of the plurality of shielding materials arranged in the vertical direction, but also the electric shielding device that raises and lowers each of the plurality of shielding materials arranged in the front and rear directions. Alternatively, a similar problem arises with an electric shielding device that raises and lowers a single shielding material.

Therefore, for the electric shielding device, there is a demand for a winding unit that improves the winding or rewinding performance of the lifting cord when the shielding material is raised and lowered. Further, there is a demand for a take-up unit that can be applied to a shielding device that manually raises and lowers a shielding material, and a technique for improving climbing performance or descending performance is desired.

Therefore, an object of the present invention is to raise and lower a shielding material having improved ascending performance or descending performance of the shielding material when the shielding material can be raised and lowered by the driving force of a motor using an elevating cord in view of the above-mentioned problems. The purpose is to provide a shielding device that enables it.

The shielding device according to the present invention is a shielding device that can raise and lower the shielding material, and winds up or rewinds an elevating cord for raising and lowering the shielding material by raising and lowering a rail provided at the lower end of the shielding material. The take-up drum is provided with a support member that rotatably supports the take-up drum, and the support member has a pulley for guiding the elevating cord of the take-up drum to the outside. The pulley is arranged to be tilted with respect to the axial direction of the take-up drum at a predetermined tilt angle that reduces at least the delivery load in the take-up drum, and the predetermined tilt angle in the take-up drum is a rearrangement for installation. It is characterized in that a plurality of symmetrical types are set to enable it.

Further, in the shielding device according to the present invention, the pulley is provided between the take-up drum and the insertion hole provided so as to lead the elevating cord to the outside, and the take-up drum and the insertion hole are provided. The feature is that the distance to the take-up drum is set based on the positional relationship of.

Further, the shielding device according to the present invention is a shielding device that can raise and lower the shielding material, and winds or winds an elevating cord for raising and lowering the shielding material by raising and lowering a rail provided at the lower end of the shielding material. The take-up drum is provided with a take-up drum to be returned and a support member that rotatably supports the take-up drum, and the take-up drum has a steep slope portion on the base end side where winding of the elevating cord is started. The support member has a cone shape consisting of a gentle slope portion having a gentle slope portion from the steep slope portion to the tip portion, and the support member limits the number of windings of the elevating cord on the steep slope portion to a predetermined number or less. It is characterized by being.

Further, the shielding device according to the present invention is a shielding device that can raise and lower the shielding material, and winds or winds an elevating cord for raising and lowering the shielding material by raising and lowering a rail provided at the lower end of the shielding material. A winding drum to be returned and a support member for rotatably supporting the winding drum are provided, and the support member has a function of sequentially pushing and winding the lifting cord when the lifting cord is wound by the winding drum. It is characterized by having.

Further, in the shielding device according to the present invention, the support member has a shaft cover provided on the base end side where the winding of the elevating cord in the winding drum is started, and the support member is the winding drum. It has a protrusion having a function of sequentially pushing and winding the lift cord when the lift cord is wound up, and the protrusion is provided on the shaft cover.

Further, in the shielding device according to the present invention, the protrusion has a curved surface curved so as to maintain a gap smaller than the cord diameter of the elevating cord with respect to the base end, and the tip of the protrusion has a curved surface. , It is characterized by having elasticity that assists the function of the push winding.

According to the present invention, it is possible to improve the ascending performance or the descending performance of the shielding material in the shielding device that can raise and lower the shielding material by the driving force of the motor using the elevating cord.

(A) to (c) are a plan view, a front view, and a side view showing a schematic configuration of the electric shielding device of one embodiment according to the present invention, respectively. It is a block diagram which shows the schematic structure of the control device in the electric shielding device of one Embodiment by this invention. It is a perspective view which shows the schematic structure of the winding unit of one Example which concerns on this invention. It is an exploded perspective view which shows the schematic structure of the winding unit of one Example which concerns on this invention. FIGS. (A) and (b) are plan views showing how the pulleys of the cord outlet member in the take-up unit according to the present invention can be rearranged. It is a front view which partially illustrated the cross section which shows the schematic structure of the winding unit of one Example which concerns on this invention. (A) is a side view partially cross-sectionally showing a schematic configuration of a winding unit according to an embodiment of the present invention, and (b) is a simplified view thereof. (A) is a simplified schematic plan view showing the operation related to the lowering performance of the take-up unit of the comparative example based on the prior art, and (b) shows the operation related to the lowering performance of the take-up unit of one embodiment according to the present invention. It is a simplified plan view which shows. (A) is a side view partially cross-sectionally showing a schematic configuration of a winding unit of a modified example according to the present invention, and (b) is a cord outlet member in the winding unit of the modified example according to the present invention. It is a top view which shows how the pulley can be rearranged. (A) and (b) are plan views showing how the shaft cover can be rearranged in the take-up unit according to the embodiment of the present invention, respectively. (A) and (b) are the time of line contact and the point at the time of the push winding which concerns the winding of the elevating cord by the protrusion of the shaft cover of one Example in the winding unit of one Example which concerns on this invention, respectively. It is a top view which shows the state at the time of contact. (A) is a simplified schematic plan view showing the operation related to the ascending performance of the take-up unit of the comparative example based on the prior art, and (b) shows the operation related to the ascending performance of the take-up unit of one embodiment according to the present invention. It is a simplified plan view which shows. In (a) and (b), the shape of the shaft cover of the modified example in the winding unit of one embodiment of the present invention and the push winding related to the winding of the elevating cord by the protrusion of the shaft cover of the modified example are shown. It is a top view which shows the state at the time of performing.

Hereinafter, an electric shielding device according to an embodiment of the present invention will be described with reference to the drawings. In the specification of the present application, with respect to the front view of the electric shielding device shown in FIG. The left direction is defined as the left side of the electric shielding device, and the right direction in the figure is defined as the right side of the electric shielding device. Further, in the example described below, the side to be visually recognized is the front side (or the indoor side) and the opposite side is the rear side (or the outdoor side) with respect to the front view of the electric shielding device shown in FIG. 1 (b). ..

(overall structure)
1 (a) to 1 (c) are a plan view (downward view), a front view, and a side view showing a schematic configuration of an electric shielding device according to an embodiment of the present invention, respectively. As a typical example of the electric shielding device shown in FIG. 1, an electric pleated screen in which a plurality of shielding materials are arranged one above the other and can be raised and lowered is shown. However, it is not necessary to limit this as long as it is possible to electrically raise and lower each of a single or multiple shielding materials using a string-shaped lifting cord. For example, a pleated screen, a honeycomb which is also a kind thereof. A screen, a horizontal blind, a raised curtain, or the like, or a hybrid-structured electric shielding device in which these different types of shielding materials are arranged so as to be arranged in the vertical or front-rear direction may be used.

In the electric pleated screen of one embodiment shown in FIGS. 1 (a) to 1 (c), an upper screen 6U that can be bent in a zigzag shape is suspended and supported from the lower surface of the head box 1, and the lower end of the upper screen 6U is supported. It is attached to the upper surface of the intermediate rail 7U that functions as a weight member. The head box 1 is fixed to a mounting surface such as a ceiling surface via a bracket 15.

As shown in FIG. 1 (c), the upper screen 6U of this example is provided with a projecting piece 60 at the position of a crease on the outdoor side of the fabric to be bent in a zigzag shape, and the projecting piece 60 has a round hole or a length. Insertion holes formed by holes or the like are provided, and the elevating cords 3U and 3L hanging from the head box 1 are inserted into the insertion holes. Therefore, the elevating cords 3U and 3L are hung on the back side of the upper screen 6U so that they cannot be visually recognized from the front as shown in FIG. 1B to enhance the aesthetic appearance. However, according to the present invention, an insertion hole may be provided in a substantially central portion in the front-rear direction of the upper screen 6U so that the elevating cords 3U and 3L inserted through the insertion hole can be visually recognized from the front. Further, as shown in FIG. 1 (c), a pitch holding cord 4U is hung from the head box 1 behind the elevating cords 3U and 3L, and the lower end thereof is attached to the intermediate rail 7U. A large number of annular support cords 40 are provided in the pitch holding cord 4U at equal intervals, and elevating cords 3U and 3L are inserted through the support cords 40. Then, when the intermediate rail 7U is lowered to extend the upper screen 6U, the projecting pieces 60 are supported by the support cords 40 of the pitch holding cords 4U so that the folds of the upper screen 6U are held at substantially equal intervals. It has become.

Further, a lower screen 6L that can be bent in a zigzag shape is suspended from the lower surface of the intermediate rail 7U, and the lower end of the screen 6L is attached to the upper surface of the bottom rail 7L that functions as a weight member.

Similar to the upper screen 6U, the lower screen 6L of this example is also provided with a projecting piece 60 at the position of the crease on the outdoor side of the fabric that can be bent in a zigzag shape, as shown in FIG. 1 (c). The 60 is provided with an insertion hole formed of a round hole, an elongated hole, or the like, and an elevating cord 3L hanging from the head box 1 and penetrating the intermediate rail 7U is inserted into the insertion hole. Therefore, the elevating cord 3L hangs down on the back side of the lower screen 6L so that it cannot be visually recognized from the front as shown in FIG. 1B to enhance the aesthetic appearance. However, according to the present invention, an insertion hole may be provided in a substantially central portion in the front-rear direction of the lower screen 6L so that the elevating cord 3L inserted through the insertion hole can be visually recognized from the front. Further, as shown in FIG. 1 (c), a pitch holding cord 4L is hung from the head box 1 behind the elevating cord 3L, and the lower end thereof is attached to the bottom rail 7L. A large number of annular support cords 40 are provided in the pitch holding cord 4L at equal intervals, and an elevating cord 3L is inserted through the support cord 40. Then, when the bottom rail 7L is lowered to extend the lower screen 6L, the projecting pieces 60 are supported by the support cords 40 of the pitch holding cords 4L so that the folds of the lower screen 6L are held at substantially equal intervals. It has become.

Winding drums 51U and 51L are arranged side by side in front of and behind each winding unit 5 arranged in appropriate places (two places on the left and right in this example) in the head box 1 and are rotatably supported.

The upper end of the string-shaped elevating cord 3U is attached to each take-up drum 51U so as to be rewound or rewound, and the lower end of the elevating cord 3U is each protruding piece provided on the outdoor side of the upper screen 6U. It penetrates the insertion hole formed in 60 and is attached to the intermediate rail 7U. The take-up drum 51U is formed so that the diameter gradually decreases toward one of the axial directions, and the string-shaped elevating cord 3U is sequentially spirally wound around the take-up drum 51U.

Further, the upper end of the string-shaped elevating cord 3L is attached to each take-up drum 51L so as to be rewound or rewound, and the lower end of the elevating cord 3L is provided on the outdoor side of the upper screen 6U. It penetrates the insertion hole formed in the projecting piece 60, further penetrates the intermediate rail 7U, penetrates the insertion hole formed in each projecting piece 60 provided on the outdoor side of the lower screen 6L, and penetrates the bottom rail 7L. Be attached to. The take-up drum 51L is formed so that the diameter gradually decreases toward one of the axial directions, and the string-shaped elevating cord 3L is sequentially spirally wound around the take-up drum 51L.

A drive shaft 2U is inserted through the central shaft of each take-up drum 51U, and the rotation of the drive shaft 2U is transmitted to the take-up drum 51U.

Similarly, a drive shaft 2L is inserted through the central shaft of each take-up drum 51L, and the rotation of the drive shaft 2L is transmitted to the take-up drum 51L.

In particular, although the details will be described later, the take-up unit 5 of the present embodiment covers the base end side of the take-up drums 51U and 51L, and push-winds the hoisting cords 3U and 3L, respectively. A shaft cover 53 that suppresses the shake phenomenon and improves the ascending performance of the upper screen 6U and the lower screen 6L, respectively, and guides the elevating cords 3U and 3L to be led out to the outside, and at least in the elevating cords 3U and 3L, respectively. The pulleys 55 and 56 are provided so as to be tilted with respect to the axial direction of each take-up drum 51U and 51L at a predetermined tilt angle to reduce the delivery load, and to improve the lowering performance of the upper screen 6U and the lower screen 6L, respectively. It is configured as follows.

By the way, the take-up drum 51U is provided with a clutch mechanism (not shown) that locks the rotation of the drive shaft 2U when the descent of the intermediate rail 7U is hindered by contact with an obstacle as an obstacle detection stop device. Further, also in the take-up drum 51L, a clutch mechanism (not shown) that locks the rotation of the drive shaft 2L when the lowering of the bottom rail 7L is hindered by contact with an obstacle is provided as an obstacle detection stop device.

One end of the drive shaft 2U is connected to the output shaft of the motor 9U via the drive shaft coupler 20U, and the rotation of the output shaft of the motor 9U is transmitted to the drive shaft 2U. Therefore, the drive shaft 2U is rotated by the driving force of the motor 9U, and the elevating cord 3U is wound or rewound by the take-up drum 51U based on the rotation of the drive shaft 2U, so that the intermediate rail 7U can be raised and lowered. As a result, the upper screen 6U can be raised and lowered. Since the take-up drum 51U uses the tension related to the elevating cord 3U (the weight of the upper screen 6U and the intermediate rail 7U) when the upper screen 6U is lowered, the driving force thereof is via the clutch mechanism (not shown). It is transmitted from the take-up drum 51U to the drive shaft 2U, and the driving force related to the drive shaft 2U is adjusted to control the descent.

Further, one end of the drive shaft 2L is connected to the output shaft of the motor 9L via the drive shaft coupler 20L, and the rotation of the output shaft of the motor 9L is transmitted to the drive shaft 2L. Therefore, the bottom rail 7L can be raised and lowered by rotating the drive shaft 2L with the driving force of the motor 9L and winding or rewinding the elevating cord 3L with the take-up drum 51L based on the rotation of the drive shaft 2L. As a result, the lower screen 6L can be raised and lowered. Since the take-up drum 51L uses the tension related to the elevating cord 3L (the weight of the lower screen 6L and the bottom rail 7L) when the lower screen 6L is lowered, the driving force thereof is via the clutch mechanism (not shown). It is transmitted from the take-up drum 51L to the drive shaft 2L, and the driving force related to the drive shaft 2L is adjusted to control the descent.

The drive control of each of the motors 9U and 9L is performed by the control device 10 arranged in the head box 1. A DC power supply 11 for supplying electric power to the motors 9U and 9L and the control device 10 is arranged in the head box 1. When the control device 10 receives an operation signal from the operation device 25 for operating the opening / closing of each shielding material (upper screen 6U as the upper shielding material and lower screen 6L as the lower shielding material), the control device 10 is included in the operation signal. It controls various electric shielding devices corresponding to various commands. For example, by configuring the motors 9U and 9L with DC motors, respectively, by controlling the duty ratio of the pulse signal supplied from the control device 10 to the motors 9U and 9L, the control device 10 controls the rotation speed of the motors 9U and 9L. Can be controlled. Further, encoders 8U and 8L for detecting the rotation speeds and rotation amounts of the drive shafts 2U and 2L are arranged in the head box 1, and the control device 10 is used for pulse signals output from the encoders 8U and 8L. Based on this, the rotation speed and the rotation amount of the motors 9U and 9L are controlled by managing the speed of the encoder pulse and the count value of the number of pulses. By such an operation, the control device 10 appropriately adjusts the ascending / descending speed of the upper screen 6U or the lower screen 6L in response to various commands included in the operation signal, and also adjusts the ascending / descending speed of the upper screen 6U or the lower screen 6U or the lower part. The ascending / descending stop position of the screen 6L is controlled.

In the electric pleated screen of the present embodiment configured in this way, the intermediate rail 7U is pulled up to just below the head box 1, and the upper screen 6U is folded between the head box 1 and the intermediate rail 7U, and the bottom rail is folded. When 7L is lowered, the lower screen 6L is shielded from the head box 1 to a desired position.

Further, when the intermediate rail 7U is lowered to the bottom rail 7L with the bottom rail 7L lowered to the lower limit, the lower screen 6L is folded between the intermediate rail 7U and the bottom rail 7L, and the lower screen 6L is folded between the head box 1 and the middle rail. The upper screen 6U is shielded from the rail 7U. Therefore, for example, if the upper screen 6U is used as a daylighting cloth and the lower screen 6L is used as a light-shielding cloth, the degree of freedom in adjusting the amount of daylighting can be increased.

Then, if the bottom rail 7L is lowered to the lower limit and the intermediate rail 7U is positioned between the head box 1 and the bottom rail 7, the soft light transmitted through the upper screen 6U made of the daylighting material can be collected. can.

When the bottom rail 7L is pulled up to the upper limit and opened, the bottom rail 7L is pulled up together with the intermediate rail 7U, and the upper screen 6U and the lower screen 6L are folded between the head box 1 and the bottom rail 7L. can do.

(Control device configuration)
FIG. 2 is a block diagram showing a schematic configuration of a control device 10 in an electric shielding device according to an embodiment of the present invention.

Upon receiving the operation signal from the operation device 25, the control device 10 performs various controls of the electric shielding device corresponding to various commands included in the operation signal. For example, the control device 10 manages the speed and the count value of the number of encoder pulses from the encoders 8U and 8L to control the rotation speed and the rotation amount of the motors 9U and 9L, and each shielding material (each screen and each bottom rail). ) Ascending / descending speed is adjusted appropriately, and the ascending / descending stop position of each shielding material is controlled.

Then, as shown in FIG. 2, the control device 10 includes a microcomputer unit 101, a storage unit 102, a communication interface (IF) unit 103, a motor drive unit 107U, 107L, an abnormality detection unit 108U, 108L, and a pulse detection unit 109U. , 109L is provided.

Although the communication IF unit 103 is comprehensively shown in FIG. 2, the communication IF unit 103 performs bidirectional or one-way communication with the operation device 25 according to each form of the operation device 25, and performs an operation signal from the operation device 25. Is a functional unit that receives and outputs to the microcomputer unit 101.

For example, when the operation device 25 is configured to transmit an operation signal by short-range wireless communication, the communication IF unit 103 receives the operation signal from the operation device 25 and outputs the operation signal to the microcomputer unit 101. It has a function and enables mutual communication between the microcomputer unit 101 and the operation device 25, and enables the exchange of detailed commands related to the operation.

Further, the communication IF unit 103 has a function of receiving an operation signal from the operation device 25 and outputting it to the microcomputer unit 101 when the operation device 25 is configured to transmit an operation signal by an infrared signal. Have.

Further, when the operation device 25 is configured to transmit an operation signal by bidirectional or one-way wired communication, the communication IF unit 103 receives the operation signal from the operation device 25 and is a microcomputer unit. It has a function to output to 101.

For example, the operating device 25 according to the present invention has a form in which it is impossible to specify the opening / closing position of each shielding material (upper screen 6U as the upper shielding material and lower screen 6L as the lower shielding material), for example, opening / closing each shielding material. Not only wired or wireless switches, infrared switches, multi-switches, smartphones, tablets, personal computers, zone switches, dial switches, etc. that can be operated individually, but also each shielding material (upper screen 6U and lower as upper shielding material). Each opening / closing position of the lower screen 6L) as a shielding material can be individually or simultaneously specified to be a multi-switch, a smartphone, a tablet, a personal computer, a zone switch, a dial switch, etc. for wired or wireless operation. ..

The motor drive units 107U and 107L are motor drivers that drive the motors 9U and 9L, respectively.

The abnormality detection units 108U and 108L are functional units that detect abnormal values (one or more of overcurrent / abnormal waveform current / abnormal waveform voltage) in the motor drive units 107U and 107L, respectively, and notify the microcomputer unit 101. ..

The pulse detection units 109U and 109L are functional units that receive pulse signals from the encoders 8U and 8L, respectively, and notify the microcomputer unit 101.

The microcomputer unit 101 receives an operation signal received via the communication IF unit 103 by reading and executing a program stored in advance in the storage unit 102, and processes various commands included in the operation signal. .. As a result, the control device 10 that performs various controls of the electric shielding device can be configured as a computer.

Then, for the function of the control device 10 realized by the execution of the program by the microcomputer unit 101, the operation signal is received, various commands included in the operation signal are discriminated, and various controls of the corresponding electric shielding device are performed. Function, The presence / absence of an encoder pulse and the number of encoder pulses are counted via the pulse detection units 109U and 109L that receive pulse signals from the encoders 8U and 8L, respectively, and the count value is appropriately stored in the storage unit 102. Function to store and manage various settings related to the setting upper limit position and setting lower limit position of each shielding material that can be set according to the count value of the number of encoder pulses, the function to store and manage in the storage unit 102, drive of motors 9U, 9L The function of controlling the drive of the motors 9U and 9L via the motor drive units 107U and 107L, respectively, and one or more of the abnormal values (overcurrent / abnormal waveform current / abnormal waveform voltage) in the motor drive units 107U and 107L. ) Are detected and notified to the microcomputer unit 101, respectively, and the function of monitoring the abnormal value is included via the abnormality detecting units 108U and 108L.

In the electric shielding device of the present embodiment, each of the motors 9L and 9U and the control device 10 are connected by a motor harness, but the physical upper limit position and physical when raising and lowering the screen like a conventional electric pleated screen. No physical detection switch is provided to detect the lower limit position. Even in this case, the control device 10 determines an absolute upper setting lower limit position based on the count value of the encoder pulse obtained from the encoders 8L and 8U, or in the motor drive units 107L and 107U by the abnormality detection units 108L and 108U. One or more of these methods, such as detecting an abnormal value (one or more of overcurrent / abnormal waveform current / abnormal waveform voltage), or detecting that the input of the encoder pulse for a predetermined time disappears during operation control. It is possible to detect the physical upper limit position and the physical lower limit position that define the physical elevating operation range for each of the upper screen 6U and the lower screen 6L. Then, the control device 10 can make various settings regarding the set upper limit position, the set lower limit position, and the like of each shielding material based on the detected physical upper limit position and physical lower limit position.

(Rewinding unit)
FIG. 3 is a perspective view showing a schematic configuration of a take-up unit 5 according to an embodiment of the present invention, and FIG. 4 is an exploded perspective view showing a schematic configuration of the take-up unit 5. Note that FIG. 4 is an exploded perspective view of the take-up unit 5 arranged on the left side of the take-up units 5 arranged on the left and right sides shown in FIG. 1 (a), and is a take-up unit arranged on the right side. Although the directions of 5 are reversed in the axial direction, they all have the same structure and are composed of members that can be rearranged in the left-right direction. Further, FIGS. 5A and 5B are plan views showing how the pulleys 55 and 56 of the cord outlet member 54 in the take-up unit 5 according to the present invention can be rearranged, respectively. be. FIG. 6 is a partially cross-sectional front view showing the schematic configuration of the take-up unit 5.

In particular, as described with reference to FIG. 4, the take-up unit 5 of the embodiment according to the present invention includes a shaft case 50, a take-up drum 51U with a clutch mechanism 52U that functions as an obstacle detection stop device, and a take-up drum 51U. It includes a take-up drum 51L with a clutch mechanism 52L that functions as an obstacle detection / stopping device, a shaft cover 53, a cord outlet member 54, a pulley 55 for an elevating cord 3U, and a pulley 56 for an elevating cord 3L. ..

The shaft case 50 and the shaft cover 53 are configured as support members that rotatably support the take-up drums 51U and 51L, and the cord outlet member 54 that rotatably supports the pulleys 55 and 56 is on the bottom surface side of the shaft case 50. It is configured as a part of the support member attached to the. Therefore, although the cord outlet member 54 and the shaft case 50 in this embodiment are separate members as a preferable example from the viewpoint of assembleability, they can also be integrated members.

First, the drive shaft 2U is inserted through the central shaft of the take-up drum 51U and the clutch mechanism 52U, and similarly, the drive shaft 2L is inserted through the central shaft of the take-up drum 51L and the clutch mechanism 52L.

The take-up drums 51U and 51L gradually reach the tip end portion provided with the cord attachment portion 51c for attaching one end of the elevating cords 3U and 3L from the base end portion side where the elevating cords 3U and 3L are started to be wound up, respectively. It has a cone shape with a small diameter, and is divided into a steep slope portion 51d having a steep slope on the base end side as a whole and a gentle slope portion 51e having a gentle slope from the steep slope portion 51d to the tip portion. A shaft portion 51b for partially accommodating the clutch mechanisms 52U and 52L is provided on the base end side of each take-up drum 51U and 51L, and the tip portion provided with the cord attachment portion 51c is provided with a shaft portion 51b, respectively. A cap member having a shaft portion 51a formed with a through hole 511 that penetrates the drive shafts 2U and 2L of the above in a non-engaged manner is fixed. The steep slope portion 51d in each take-up drum 51U, 51L has a larger diameter change than the region of the gentle slope portion 51e.

The clutch mechanisms 52U and 52L are in charge of transmitting the rotation of the drive shafts 2U and 2L to the take-up drums 51U and 51L, and transmitting the drive force of the take-up drums 51U and 51L to the drive shafts 2U and 2L, respectively. It has a matching tubular rotating drum (not shown) and a tubular cam clutch 52a that can slide in the axial direction with respect to each of the rotating drums. A saw-toothed cam portion 52b is formed on the peripheral wall of the tubular cam clutch 52a.

Then, when the upper shielding material (upper screen 6U having the intermediate rail 7U at the lower end) is lowered, the rotation of the take-up drum 51U is delayed with respect to the rotation of the rotating drum that engages with the drive shaft 2U (that is,). When an obstacle is detected), the cam portion 52b of the cam clutch 52a in the clutch mechanism 52U protrudes from the shaft portion 51b of the take-up drum 51U in the axial direction, and when the obstacle is removed, the cam portion 52b retracts to the shaft portion 51b side. It is designed to slide to. Similarly, when the lower shielding material (lower screen 6L having the bottom rail 7L at the lower end) is lowered, the rotation of the take-up drum 51L is delayed with respect to the rotation of the rotating drum that engages with the drive shaft 2L ( That is, when an obstacle is detected), the cam portion 52b of the cam clutch 52a in the clutch mechanism 52L protrudes from the shaft portion 51b of the take-up drum 51U in the axial direction, and when the obstacle is removed, it retracts to the shaft portion 51b side. It is designed to slide like this.

In the winding drums 51U and 51L of the present embodiment, the rotation of the drive shafts 2U and 2L is transmitted via the clutch mechanisms 52U and 52L, but the clutch mechanisms 52U and 52L are not provided. However, in that case, the rotation of the respective drive shafts 2U and 2L is engaged and inserted so as to be directly transmitted to the winding drums 51U and 51L in a relative non-rotatable manner.

The shaft case 50 has a bowl-shaped accommodating portion 50a as shown in which the winding drums 51U and 51L are arranged side by side in the front-rear direction and rotatably supported. The pair of annular bearing portions 50b in the front-rear direction provided on the proximal end side of the shaft case 50 have a cylindrical shape in the clutch mechanisms 52U and 52L on the proximal end side of the take-up drum 51U and the take-up drum 51L, respectively. The cam clutch 52a of the above is inserted and supported. The winding drum 51U and the shaft portion 51a on the tip end side of the take-up drum 51L are supported in the round recesses 50c provided on the tip end side of the shaft case 50, respectively. The shaft case 50 has a shape that is symmetrical even if the shaft case 50 is rearranged in the front-rear direction.

Further, the shaft case 50 is also formed with a pair of bearing portions 50e that support the shaft portions 51b of the winding drums 51U and 51L, respectively, and has a wall portion 50d at the boundary between the pair of bearing portions 50e and the accommodating portion 50a. A step is formed. Then, in the shaft case 50, the winding drums 51U and 51L are arranged side by side in the front-rear direction so that the winding drums 51U and 51L can rotate in a state where the boundary between the shaft portion 51b and the steep slope portion 51d in the winding drums 51U and 51L is located on the wall portion 50d. It has come to support. A convex portion 50f is formed on each bearing portion 50e, and when the cam portion 52b of the cam clutch 52a in each clutch mechanism 52U, 52L protrudes from the shaft portion 51b of each take-up drum 51U, 51L in the axial direction. In addition, the rotation of the drive shafts 2U and 2L is locked by contacting the convex portions 50f.

In order to fit the shaft cover 53 from above with the winding drums 51U and 51L mounted on the shaft case 50, the front and rear of the pair of bearing portions 50b and 50e for the winding drums 51U and 51L, respectively. The end wall piece 50g is formed upright, a flat surface portion 50i is formed between the pair of bearing portions 50b and 50e, and each end wall piece 50g is provided with a fitting hole 50h.

The shaft cover 53 has a main body portion 53a that supports the shaft portion 51b of each take-up drum 51U, 51L from above, and a fitting convex portion 53b and a main body portion 53a are provided at a substantially central portion on the rear end side of the main body portion 53a. A fitting convex portion 53c is formed in a substantially central portion on the front end side. A abutting piece 53d extending downward is formed in a substantially central portion of the main body portion 53a in the front-rear direction. In a state where the abutting piece 53d is abutted against the flat surface portion 50i of the shaft case 50, the fitting convex portions 53b and 53c are fitted with the fitting holes 50h provided in each end wall piece 50g of the shaft case 50, respectively. By doing so, the shaft cover 53 can be fitted so as to rotationally support the shaft portion 51b of each take-up drum 51U, 51L mounted on the shaft case 50 from above.

By the way, the support member that rotatably supports the winding drums 51U and 51L of the present embodiment is wound by the shaft cover 53 on both the left and right ends of the main body 53a by the steep slope portion 51d of the winding drums 51U and 51L alone. A stepped protrusion 53e is formed so as to reduce the number of turns (7 in this example) of each of the possible elevating cords 3U and 3L to a smaller predetermined number or less (certainly 3 turns or less). There is. A curved surface 531 curved so as to maintain a gap smaller than the cord diameter of each elevating cord 3U, 3L is formed between each protrusion 53e and the steep slope portion 51d. Further, as a suitable example, the tip portion 53f of each protrusion 53e is made elastic by further reducing the wall thickness in order to further improve the function of the push winding, and even if the elevating cords 3U and 3L are in line contact with each other. It is formed in a substantially triangular shape when viewed from above so that it may be in point contact (described later with reference to FIGS. 10 and 11). Since the elevating cords 3U and 3L may be in line contact or point contact, the shape of each protrusion 53e when viewed from above the tip portion 53f may be a circular shape, an elliptical shape, or another polygonal shape. Therefore, each of the protrusions 53e has a function of sequentially pushing and winding the elevating cords 3U and 3L even when the take-up drums 51U and 51L rotate at low speed.

That is, in the example shown in FIG. 4, each of the elevating cords 3U and 3L is wound while sliding one roll around each winding drum 51U and 51L by the protrusions 53e provided on both right end sides of the main body 53a. You will be able to take it. A total of four stepped protrusions 53e are provided on both the left and right ends of the main body 53a, but this is to enable the winding unit 5 to be rearranged in the left-right direction. Further, each of the protrusions 53e having such a push-winding function can be provided on the shaft case 50 side instead of being provided on the shaft cover 53. However, by providing each protrusion 53e on the shaft cover 53 side, the pushing action can be exerted at the position where the elevating cords 51U and 51L are started to be wound by the winding drums 51U and 51L. Can be further improved.

Further, the shaft case 50 is fitted with a cord outlet member 54 for guiding the elevating cords 3U and 3L hanging from the take-up drums 51U and 51L via the pulleys 55 and 56 from the bottom surface side thereof. Openings 50j, 50K, 50m are provided in the front-rear direction, and plate-shaped receiving pieces 50n are formed between the openings 50j, 50K and between the openings 50j, 50m, respectively, and both ends in the left-right direction of each abutting piece 50n. Is formed with a fitting receiving portion 50p.

The cord outlet member 54 is a member that rotatably supports the pulleys 55 and 56 and guides the elevating cords 3U and 3L hanging from the take-up drums 51U and 51L via the pulleys 55 and 56. .. In particular, in the cord outlet member 54, the shafts 55a and 56a of the pulleys 55 and 56 are arranged non-parallel to the axial direction of the take-up drums 51U and 51L, that is, tilted, and the take-up drums of the elevating cords 3U and 3L are arranged. The load (at least the delivery load) related to the drooping from the 51U and 51L is reduced and guided.

More specifically, the cord outlet member 54 has an outer shape in which a cover wall 54b having a substantially U-shaped cross section is formed upright on the rear end side of the substantially flat plate-shaped main body, and the front end side of the substantially flat plate-shaped main body thereof. The abutting piece 54a is formed at the substantially central portion in the front-rear direction. Then, a pair of hanging pieces 54e are formed to project forward in the vicinity of both ends in the left-right direction of the abutting piece 54a on the front end side of the substantially flat plate-shaped main body, and the abutting piece 54a at the substantially central portion in the front-rear direction of the substantially flat plate-shaped main body is formed. A pair of claw portions 54f are formed so as to project rearward in the vicinity of both ends in the left-right direction. The pair of hanging pieces 54e and the pair of claws 54f are fitted with the respective fitting receiving portions 50p formed before and after the opening 50j of the shaft case 50, and the cord outlet member 54 is mounted from below the shaft case 50. (It will be described later with reference to FIG. 7 (a)).

When the cord outlet member 54 is mounted from below the shaft case 50, the openings 50j and 50k of the shaft case 50 are closed by the shape of the main body including the cover wall 54b of the cord outlet member 54. Here, the opening 50 m of the shaft case 50 is not closed. However, in this example, the cord outlet member 54 can be rearranged in the front-rear direction so that the take-up unit 5 can be rearranged in the left-right direction. The openings 50j and 50m of the shaft case 50 are closed. Therefore, it is possible to provide a cover wall similar to the cover wall 54b on the front end side of the substantially flat body so that the opening 50 m is closed, but in this example, the cord outlet member 54 for the shaft case 50 is provided. The cover wall 54b is provided only on the side where the mounting direction can be understood at a glance and the protrusion of the elevating cord 3U can be suppressed. A square protrusion 54k (see FIG. 7A) is formed below the bottom surface of the cord outlet member 54, and the square protrusion 54k is formed in the bottom surface of the head box 1 as a square hole (see FIG. 7A). By engaging with (not shown) and mounting the end wall piece 50 g of the shaft case 50 engaged in the head box 1, front-rear, left-right, and up-down rattling is suppressed.

In particular, in the cord outlet member 54 of the present embodiment, the insertion hole 54c for inserting the elevating cord 3U hanging from the take-up drum 51U is in the front-rear direction of the abutting piece 54a at the substantially central portion in the front-rear direction of the cord outlet member 54. An insertion hole 54d provided near the front side of the substantially central portion and for inserting the elevating cord 3L hanging from the take-up drum 51L is provided near the front side of the cover wall 54b in the cord outlet member 54 in the front-rear direction. There is.

Then, as can be understood from the plan view (downward view) of the cord outlet member 54 in FIGS. 5A and 5B, there are two types for rotatably engaging and supporting the shafts 55a at both ends of the pulley 55. The pair of bearing portions 54g and 54h are provided, and both of the pair of bearing portions 54g and 54h are arranged so as to displace the pulley 55 non-parallel to the axial direction of the take-up drum 51U, that is, at an angle. It has become. The shaft 55a of the pulley 55 can be attached to and detached from each of the pair of bearing portions 54g and 54h, but a bearing groove 541 having a substantially Ω shape is formed so that the shaft 55a is not easily disengaged once it is fitted. Similarly, two types of pair of bearing portions 54i and 54j for rotatably supporting the shafts 56a at both ends of the pulley 56 are provided, and both of the two types of pair of bearing portions 54i and 54j are provided. The pulley 56 is arranged so as not parallel to the axial direction of the take-up drum 51L, that is, tilted. The shaft 56a of the pulley 56 can be attached to and detached from each of the pair of bearing portions 54i and 54j, but a bearing groove 542 having a substantially Ω shape is formed so that the shaft 56a of the pulley 56 is not easily disengaged once it is fitted. Although each of the pulleys 55 and 56 shows an example of having the same shape, they may have different shapes having different diameters.

As shown in comparison with FIGS. 5 (a) and 5 (b), the inclination angles of the pulleys 55 and 56 are set to a plurality of symmetrical types that enable rearrangement in the installation direction. That is, of the take-up units 5 arranged on the left and right sides shown in FIG. 1 (a), the pulleys 55 and 56 are arranged as shown in FIG. 5 (a) for the take-up unit 5 arranged on the left side. Of the take-up units 5 arranged on the left and right sides shown in FIG. 1 (a), the pulleys 55 and 56 are arranged as shown in FIG. 5 (b) for the take-up unit 5 arranged on the right side. It is possible to rearrange the take-up unit 5 in the left-right direction with the same member.

Assuming that the tilt angles of the pulleys 55 and 56 with respect to the axial direction of the take-up drums 51U and 51L are 0 ° in the parallel state and 90 ° in the vertical state, FIGS. 5 (a) and 5 (b) show. In the example shown, an example in which the tilt angle is 30 ° is shown, but depending on the shape and size of the take-up drums 51U and 51L to be used, any angle larger than 0 ° and smaller than 90 ° can be used as the tilt angle. is assumed. In FIG. 6, in the cord outlet member 54, the shaft 55a of the pulley 55 is arranged non-parallel to the axial direction of the take-up drum 51U, that is, tilted, and the load related to the hanging of the elevating cord 3U from the take-up drum 51U. It shows how to reduce (at least the sending load) and guide.

7 (a) is a partially cross-sectional view showing the schematic configuration of the take-up unit 5 of the embodiment according to the present invention, and FIG. 7 (b) is FIG. 7 (a). It is a simplified diagram which illustrated the arrangement of each pulley 55, 56 in an easy-to-understand manner. As shown in FIG. 7A, the pair of hanging pieces 54e and the pair of claw portions 54f in the cord outlet member 54 are fitted with the respective fitting receiving portions 50p formed before and after the opening 50j of the shaft case 50. In addition, the cord outlet member 54 can be mounted from below the shaft case 50. As shown in FIGS. 7A and 7B, by using the shaft cover 53 on which the protrusions 53e are formed, the winding drums 51U and 51L are slowed down by the function of the tip portion 53f of the protrusions 53e. Even in rotation, the elevating cords 3U and 3L are sequentially pushed and wound. Further, by using the cord outlet member 54 in which the shafts 55a and 56a of the pulleys 55 and 56 are arranged non-parallel to the axial direction of the winding drums 51U and 51L, that is, tilted, the winding of the elevating cords 3U and 3L is performed. The load (at least the delivery load) related to the drooping from the take-up drums 51U and 51L is reduced and guided.

As can be understood from FIG. 7B, the cord outlet member 54 is not only arranged in an inclined manner with respect to the arrangement of the pulleys 55 and 56, but also in accordance with the shape of the take-up drums 51U and 51L. The distances La and Lb from the central axis of the take-up drums 51U and 51L may be the same, or as different distances as in this example, two types of pair of bearing portions 54g and 54h and two types of pair of bearing portions are used. It can be assumed that 54i and 54j are formed. That is, the pulleys 55 and 56 are provided between the corresponding take-up drums 51U and 51L and the insertion holes 54c and 54d provided so as to lead the elevating cords 3U and 3L to the outside. The distances La and Lb with respect to the take-up drums 51U and 51L are set based on the positional relationship between the take-up drum 51U and the insertion hole 54c and the positional relationship between the take-up drum 51L and the insertion hole 54d.

Further, in the present embodiment, as shown in FIGS. 7 (a) and 7 (b), the elevating cord 3U is hung from the right side (rear side) of the drawing of the take-up drum 51U and hung down into the insertion hole 54c via the pulley 55. An example of this is shown, in which the winding direction of the winding drum 51U is reversed, and the elevating cord 3U is hung from the left side (front side) of the drawing drum 51U in the drawing hole 54c via the pulley 55. The pulleys 55 may be hung down, and in this case as well, since the pulleys 55 are arranged in an inclined manner, the load related to the hanging from the take-up drum 51U (at least the delivery load) can be reduced and guided. Similarly, an example is shown in which the elevating cord 3L is hung from the right side (rear side) of the take-up drum 51L and hung down from the insertion hole 54d via the pulley 56, but the winding direction of the take-up drum 51L is reversed. On the side, the elevating cord 3L may be hung from the left side (front side) of the take-up drum 51L and hung from the insertion hole 54d via the pulley 56. In this case as well, the pulley 56 is arranged in an inclined manner. Therefore, the load (at least the delivery load) related to the drooping from the take-up drum 51L can be reduced and guided.

(Conventional comparison of descent performance)
FIG. 8A is a simplified plan view showing the operation of the take-up unit 5P of the comparative example based on the prior art regarding the lowering performance, and FIG. 8B is a plan view showing the operation of the take-up unit 5P of the comparative example according to the present invention. It is a simplified schematic plan view which shows the operation about the descent performance of. In FIG. 8, the same reference numbers are assigned to the same components described above.

First, in the winding unit 5P of the comparative example shown in FIG. 8A, although not exactly illustrated, the slit-shaped guide portion S disclosed in Patent Document 1 is provided in the cord outlet member 54 and is wound. The configuration in which the elevating cord 3U hanging from the drum 51U is inserted into the insertion hole 54c via the slit-shaped guide portion S is illustrated. Further, in the winding unit 5P of the comparative example shown in FIG. 8A, a pulley 54d parallel to the axial direction of the winding drum 51L as disclosed in Patent Document 2 is provided on the cord outlet member 54 and wound. The configuration in which the elevating cord 3L hanging from the take-up drum 51L is inserted into the insertion hole 54d via the pulley 54d parallel to the axial direction of the take-up drum 51L is illustrated.

In the winding unit 5P of the comparative example based on such a conventional technique, as shown in FIG. 8 (a-1), the electric shielding device is located near the lower limit of each shielding material (upper screen 6U and lower screen 6L) when descending. As a result, since it is normal to rotate the take-up drums 51U and 51L at a lower speed than the manual shielding device, the delivery load of the elevating cords 3U and 3L increases at the low speed rotation. Therefore, a load component for the partition wall for preventing irregular winding in the slit-shaped guide portion S when guiding the elevating cord 3U for the upper shielding material to the winding drum 51U near the lower limit of the elevating of the upper shielding material (upper screen 6U). However, it becomes so large that it cannot be ignored for a low-speed descent operation, and the upper shield material cannot be sufficiently lowered to the lower limit position of the ascending / descending position, which may cause a problem in the descent performance of the upper shield material. Further, near the lower limit of elevating and lowering of the lower shielding material (lower screen 6L), on the central shaft of the shaft cover 54 (or the illustrated winding drum 51L) when guiding the elevating cord 3L for the lower shielding material to the winding drum 51L. On the other hand, the load component of the parallel-arranged pulleys 54d) becomes so large that it cannot be ignored for the low-speed descent operation, and the lower shielding material cannot sufficiently descend to the lower limit position of the ascending / descending position, which causes a problem in the descent performance of the lower shielding material. Sometimes.

In the winding unit 5P of the comparative example based on such a conventional technique, as shown in FIG. 8 (a-2), each shielding material (upper screen 6U and lower screen 6L) is near the upper limit (or the lower limit) when descending. In (other than the vicinity), even if the take-up drums 51U and 51L are rotated at a lower speed than the manual shielding device as the electric shielding device, the sending load of the elevating cords 3U and 3L is small and there is no problem in the descent performance.

On the other hand, in the take-up unit 5 of the embodiment according to the present invention shown in FIG. 8 (b), although not exactly illustrated, the pulley 55 is not balanced with respect to the central axis of each take-up drum 51U, 51L, that is, is inclined. , 56 are provided in the cord outlet member 54, and the elevating cord 3U hanging from the take-up drum 51U is inserted into the insertion hole 54c through the inclined pulley 55, and the elevating cord 3L hanging from the take-up drum 51L is inserted. The configuration in which the pulley is inserted into the insertion hole 54d via the inclined pulley 56 is illustrated.

In the winding unit 5 of the embodiment according to the present invention as described above, as shown in FIG. 8 (b-1), the electric shielding device is located near the lower limit of each shielding material (upper screen 6U and lower screen 6L) when descending. As a result, even if the rotation speed is lower than that of the manual shielding device, the delivery load of each of the elevating cords 3U and 3L does not increase, and the delivery load can be reduced as compared with the conventional technique. Therefore, the upper shielding material can be sufficiently lowered to the lower limit position of the ascending / descending position with a margin, and the lowering performance of the upper shielding material can be improved as compared with the conventional technique.

Further, in the winding unit 5 of the embodiment according to the present invention, as shown in FIG. 8 (b-2), each shielding material (upper screen 6U and lower screen 6L) is near the upper limit (or lower limit) when descending. In (other than the vicinity), even if the take-up drums 51U and 51L are rotated at a lower speed than the manual shielding device as the electric shielding device, the sending load of the elevating cords 3U and 3L is small and there is no problem in the descent performance.

Therefore, according to the electric shielding device of the present embodiment including the winding unit 5 of one embodiment according to the present invention, the descent performance of the upper shielding material and the lower shielding material can be improved. Similarly, in the electric shielding device composed of a single shielding material, the descent performance of the single shielding material is similarly provided by the configuration including the inclined pulley in the winding unit 5 of the winding unit 5 according to the present invention. Can be improved.

In the winding unit 5 of the embodiment according to the present invention, pulleys 55 and 56 are arranged between the winding drums 51U and 51L and the corresponding insertion holes 54c and 54d in the cord outlet member 54, respectively. However, an example is shown in which the slit-shaped guide portion S disclosed in Patent Document 1 is not provided. However, as the winding unit 5 of another embodiment according to the present invention, the cord outlet member 54 having a slit-shaped guide portion S between the pulleys 55 and 56 and the corresponding insertion holes 54c and 54d can also be used. good.

(Modification example of pulley arrangement)
FIG. 9A is a partially cross-sectional side view showing a schematic configuration of the winding unit 5 of the modified example according to the present invention, and FIG. 9B is a side view showing the winding unit of the modified example according to the present invention. 5 is a plan view showing how the pulleys 55 and 56 of the cord exit member 54 in No. 5 can be rearranged. In FIG. 9, the same reference numbers are assigned to the same components described above.

First, as the winding unit 5 of the modified example according to the present invention, as can be understood from FIG. 9A, the cord outlet member 54 has the winding drums 51U and 51L for the arrangement of the pulleys 55 and 56, respectively. It may be spatially inclined including front and back and up and down with respect to the central axis. That is, the cord outlet member 54 has a distance La (in this example, the distance La of both shaft portions 55a and 55b of the pulleys 55 and 56 from the central axis of the take-up drums 51U and 51L according to the shape of the take-up drums 51U and 51L. La1, La2), Lb (Lb1, Lb2 in this example), two or more types of pair of bearing portions 54g, 54h, and two or more types of pair of bearing portions so that the distances are different so that the load becomes smaller. It can be assumed that 54i and 54j are formed. That is, also in this example, the pulleys 55 and 56 are provided between the corresponding take-up drums 51U and 51L and the insertion holes 54c and 54d provided so as to lead the elevating cords 3U and 3L to the outside. However, based on the positional relationship between the take-up drum 51U and the insertion hole 54c and the positional relationship between the take-up drum 51L and the insertion hole 54d, the distance La (in this example, La1, La2) and Lb (Lb1 and Lb2 in this example) are set. Further, not only the relationship in the height direction of each of the pulleys 55 and 56, but also the relationship in the front-rear direction is set individually for two or more types of pair of bearing portions 54g, 54h, and two types of pair of bearing portions. It can be assumed that 54i and 54j are formed. Further, a plurality of types of cord outlet members 54 having different heights and inclination angles of the pulleys 55 and 56 may be prepared in advance and appropriately selected according to the shapes of the take-up drums 51U and 51L.

For example, FIG. 9B shows four types of pair of bearing portions 54g-1,54g-2 and 54h-1,54h-2, and four types of pair of bearing portions 54i-1,54i-2. And 54j-1,54j-2 are shown as an example of the cord outlet member 54 forming. In the cord outlet member 54 illustrated in FIG. 9B, each pulley 55, so that the cord outlet member 54 can be rearranged in the front-rear direction so that the take-up unit 5 can be rearranged in the left-right direction. The inclination angles of 56 are set to a plurality of symmetrical types that enable rearrangement in the installation direction.

(Relocation of shaft cover)
10 (a) and 10 (b) are plan views showing how the shaft cover 53 can be rearranged in the take-up unit 5 according to the embodiment of the present invention, respectively. 11 (a) and 11 (b) show the push related to the winding of the elevating cords 3U and 3L by the protrusion 53e of the shaft cover 53 of the embodiment in the winding unit 5 of the embodiment of the present invention, respectively. It is a top view which shows the state at the time of line contact and point contact at the time of winding.

As shown in FIGS. 10A and 10B, the shaft cover 53 of the present embodiment has the winding drums 51U on both the left and right ends of the main body 53a, as described with reference to FIGS. 3 and 4. , 51L steep slope portion 51d Protrudes so that the number of windings (7 in this example) of each elevating cord 3U, 3L that can be wound by itself is less than the predetermined number (certainly 3 or less). A stepped protrusion 53e is formed. As a preferred example, the tip portion 53f of each protrusion 53e is made to have elasticity by further reducing the wall thickness in order to further improve the function of the push winding, and is formed in a substantially triangular shape when viewed from above. The substantially triangular tip portion 53f has a point contact portion Pv that enables point contact with each elevating cord 3U, 3L as an apex, and both sides of the apex can make line contact with each elevating cord 3U, 3L. The shape is such that the line contact portion Ps is formed. As shown in FIG. 10A or FIG. 10B, the shaft cover 53 of this embodiment has a structure symmetrical to the left and right with respect to the axis at the center of the top and bottom, and is a line contact portion that enables line contact. The inclination of Ps is maintained. Further, in some cases, even if the line contact portion Ps is inverted so as to be compared with FIGS. 10 (a) and 10 (b), the inclination of the line contact portion Ps that enables line contact is maintained. The tip portion 53f of the protrusion 53e is in line contact with each of the elevating cords 3U and 3L as long as it has a shape that enables the push-winding operation related to the winding of the elevating cords 3U and 3L (see FIG. 11A). However, since point contact (see FIG. 11B) may be used, the shape of each protrusion 53e when viewed from above of the tip portion 53f may be a circular shape, an elliptical shape, or another polygonal shape.

Therefore, the tip portion 53f of each protrusion portion 53e has a shape that enables line contact including at least point contact with each of the elevating cords 3U and 3L. Therefore, each of the protrusions 53e has a function of sequentially pushing and winding the elevating cords 3U and 3L even when the take-up drums 51U and 51L rotate at low speed, thereby improving the ascending performance of the upper shielding material and the lower shielding material. You can press it.

(Conventional comparison of climbing performance)
FIG. 12 (a) is a simplified plan view showing an operation related to the ascending performance of the take-up unit 5P of the comparative example based on the prior art, and FIG. 12 (b) is a plan view showing the operation of the take-up unit 5P of the comparative example according to the present invention. It is a simplified schematic plan view which shows the operation about the climbing performance of. In FIG. 10, the same reference numbers are assigned to the same components described above.

First, in the winding unit 5P of the comparative example shown in FIG. 12A, for example, a flat end portion 53E (at least the steep slope portion 51d of each winding drum 51U, 51L according to the present invention) is not exactly illustrated. It does not have a protrusion 53e that makes the number of windings (7 in this example) of each of the elevating cords 3U and 3L that can be wound up to be less than a predetermined number (certainly 3 or less). ) Is illustrated to support the base end side of each of the take-up drums 51U and 51L from above by the shaft cover 53P.

In the winding unit 5P of the comparative example based on such a conventional technique, as can be understood from the (planar cross-sectional view) of FIG. The take-up drums 51U and 51L rotate at a low speed, and at such a low-speed rotation, the operation of repeating "4 to 5 windings and sliding" on each take-up drum 51U and 51L is performed, and the elevating cords of the take-up drums 51U and 51L are used. Cord slippage during winding is unlikely to occur, and a crisp phenomenon occurs in which each of the upper shielding material and the lower shielding material rises jerky, which may cause a problem in climbing performance.

On the other hand, in the take-up unit 5 according to the present invention shown in FIG. 12 (b), the elevating cords 3U and 3L are stepped on the steep slope portion 51d of the take-up drums 51U and 51L so as to have three or less turns. The shaft cover 53 on which the protrusion 53e is formed is provided. Each protrusion 53e has a function of sequentially pushing and winding the elevating cords 3U and 3L even when the take-up drums 51U and 51L rotate at a low speed. Then, in order to assist the function of the push winding, it is preferable that the tip portion 53f of each protrusion portion 53e has elasticity by further reducing the wall thickness as in the present embodiment. The tip portion 53f of each protrusion 53e of this embodiment is formed in a substantially triangular shape when viewed from above.

Therefore, in the take-up unit 5 according to the present invention, as can be understood from the (planar cross-sectional view) of FIG. 12 (b), each take-up drum 51U is driven to ascend at a low speed for each of the upper shield material and the lower shield material. , 51L rotates at a low speed, and even at such a low speed rotation, the operation of repeating "sliding one roll at a time" on each take-up drum 51U, 51L eliminates the shaky phenomenon, and each of the upper shielding material and the lower shielding material. The climbing performance can be improved. Similarly, in the electric shielding device composed of a single shielding material, by providing the protrusion 53e in the winding unit 5 of the winding unit 5 of the present invention, the climbing performance of the single shielding material is similarly provided. Can be improved.

In the take-up unit 5 according to the present invention, the cord outlet member 54 for inclining the pulleys 55 and 56 with respect to the central axis of each take-up drum 51U and 51L in order to improve the lowering performance and the ascending performance are improved. Therefore, due to the function of the tip portion 53f of the protrusion 53e, the winding drums 51U and 51L have functions independent of the configuration of the shaft cover 53 that sequentially pushes and winds the respective elevating cords 3U and 3L even when the winding drums 51U and 51L rotate at low speed. Therefore, the take-up unit 5 having either one or both of them can be configured.

Therefore, according to the present embodiment, it is possible to improve the ascending performance or the descending performance of the shielding material in the electric shielding device that can raise and lower the shielding material by the driving force of the motor by using the string-shaped elevating cord.

(Modification example of shaft cover)
13 (a) and 13 (b) show the shape of the shaft cover 53 of the modified example of the winding unit 5 of the winding unit 5 of the present invention, and the elevating cords of the shaft cover 53 of the modified example by the protrusion 53e. It is a top view which shows the state at the time of performing push-winding which concerns on winding of 3U, 3L. In FIG. 13, similar components are given the same reference numbers. As shown in FIG. 13 (a), the protrusion 53e of the shaft cover 53 of this modified example has a shape that separates and protrudes for each of the elevating cords 3U and 3L as shown in FIG. It has a shape that projects continuously for the lifting cords 3U and 3L. Even with the shape of the shaft cover 53 of this modification, as shown in FIG. 13 (b), the lower speed of each of the upper shield material and the lower shield material is the same as that shown in FIG. 12 (b). Each take-up drum 51U, 51L rotates at a low speed during ascending drive, and even at such a low speed rotation, the operation of repeating "sliding one roll at a time" on each take-up drum 51U, 51L is performed, and the shaking phenomenon does not occur, and the upper shielding material is used. And the climbing performance of each of the lower shielding materials can be improved. Further, the shaft cover 53 of this modification also has a structure symmetrical to the left and right with respect to the axis at the center of the top and bottom as shown in FIGS. 13 (a) or 13 (b), and the line contact enables line contact. The inclination of the site Ps is maintained. Further, in some cases, even if the line contact portion Ps is inverted so as to be compared with FIGS. 13 (a) and 13 (b), the inclination of the line contact portion Ps that enables line contact is maintained.

Further, in the modified examples shown in FIGS. 13 (a) and 13 (b), the protrusion 53e is also shown, but the shaft cover 53, the cord outlet member 54, or the shaft case 50 is not provided without such a protrusion 53e. The support member is configured to have a function of limiting the number of windings of the elevating cord that can be wound by the winding drum 51U or the steep slope portion 51d of the 51L alone to a smaller predetermined number or less, and sequentially pushing and winding the winding. You may.

Although the present invention has been described above with reference to examples of specific embodiments, the present invention is not limited to the examples of the above-described embodiments, and can be variously modified without departing from the technical idea.

For example, the electric shielding device is not limited to the above-mentioned electric pleated screen, but is limited to those that can electrically raise and lower each of a single or a plurality of shielding materials by using a string-shaped elevating cord. It is not necessary, for example, as a pleated screen, a kind of honeycomb screen, a horizontal blind, a raised curtain, etc., or as an electric shielding device having a hybrid configuration in which these different types of shielding materials are arranged vertically or in the front-rear direction. good. Further, in the example of the above-described embodiment, the electric shielding device has been mainly described as an example, but the winding unit 5 according to the present invention is also applied to the manual shielding device for manually raising and lowering the shielding material, and the lowering performance or the ascending performance is applied. Can be improved.

Therefore, the electric shielding device according to the present invention is not limited to the example of the above-described embodiment, but is limited only by the description of the scope of claims.

According to the present invention, it is possible to improve the elevating performance of the electric shielding device that can raise and lower the shielding material by the driving force of the motor, which is useful for the application of the electric shielding device.

1 Headbox 2U, 2L Drive shaft 3U Lifting cord for upper screen 3L Lifting cord for lower screen 5 Winding unit 6U Upper shielding material (upper screen)
6L lower shielding material (lower screen)
7U Intermediate rail 7L Bottom rail 8U, 8L Encoder 9U, 9L Motor 10 Control device 11 DC power supply 20U, 20L Drive shaft coupler 25 Operation device 50 Shaft case 51U, 51L Take-up drum 53 Shaft cover 53e Protrusion part 53f Tip of protrusion Part 54 Code exit member 55,56 Pulley

Claims (6)

A shielding device that allows the shielding material to be raised and lowered.
A winding drum for winding or rewinding an elevating cord for raising and lowering the shielding material by raising and lowering a rail provided at the lower end of the shielding material.
A support member that rotatably supports the take-up drum, and
The support member has a pulley for guiding the elevating cord of the take-up drum to the outside.
The pulley is arranged to be tilted with respect to the axial direction of the take-up drum at a predetermined tilt angle that reduces at least the delivery load on the take-up drum.
A shielding device characterized in that a predetermined tilt angle in the pulley is set to a plurality of symmetrical types that enable rearrangement in the installation direction. The pulley is provided between the take-up drum and an insertion hole provided so as to lead the elevating cord to the outside, and the take-up drum is based on the positional relationship between the take-up drum and the insertion hole. The shielding device according to claim 1, wherein the distance to the drum is set. A shielding device that allows the shielding material to be raised and lowered.
A winding drum for winding or rewinding an elevating cord for raising and lowering the shielding material by raising and lowering a rail provided at the lower end of the shielding material.
A support member that rotatably supports the take-up drum, and
The take-up drum has a cone shape including a steep slope portion having a steep slope portion on the base end side at which winding of the elevating cord is started, and a gentle slope portion having a gentle slope portion from the steep slope portion to the tip portion. Have and
The support member is a shielding device characterized in that the number of windings of the elevating cord that can be wound by the steep slope portion alone is limited to a smaller predetermined number or less. A shielding device that allows the shielding material to be raised and lowered.
A winding drum for winding or rewinding an elevating cord for raising and lowering the shielding material by raising and lowering a rail provided at the lower end of the shielding material.
A support member that rotatably supports the take-up drum, and
The support member is a shielding device having a function of sequentially pushing and winding the elevating cord when the elevating cord is wound by the winding drum. The support member has a shaft cover provided on the base end side at which winding of the elevating cord in the winding drum is started.
The support member has a protrusion having a function of sequentially pushing and winding the elevating cord when the elevating cord is wound by the winding drum.
The shielding device according to claim 4, wherein the protrusion is provided on the shaft cover. The protrusion has a curved surface curved so as to maintain a gap smaller than the cord diameter of the elevating cord with respect to the base end portion.
The shielding device according to claim 5, wherein the tip portion of the protrusion has elasticity that assists the function of the push winding.

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