JPH0762961A - Winding shaft drive mechanism for winding type shutter - Google Patents

Abstract

PURPOSE:To prevent a free fall when a shutter is lowered in a winding shaft drive mechanism using the winding shaft of the shutter to be driven by a DC motor and concurrently utilizing the lowering action by the tare weight by providing a drive dedicated clutch between a drive motor and the winding shaft. CONSTITUTION:A drive dedicated clutch 65 is constituted of a sun gear 66, a planet gear 67, and a ring gear 68. The ring gear 68 is divided in the axial direction into a fixed ring gear 68A and an output ring gear 68B. The drive dedicated clutch 65 transfers rotation to the output side only when it receives an input from a drive motor M regardless of the rotating direction of the drive motor M: positive direction or reverse direction, and it does not transfer the rotation in the reverse direction when it receives no input from the input shaft, i.e., when rotation torque is generated on the output side of the clutch 65. When a shutter main body is lowered in the closing direction, a free fall is prevented, and it is gently lowered according to the drive of the motor M.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable shutter suitable as a temporary storage space, for example, as a door for a luggage compartment for vehicles, a tent type warehouse, a workplace, etc.
In particular, it relates to the drive mechanism of the winding shaft.

[0002]

2. Description of the Related Art Conventionally, in so-called tent type warehouses, workshops, or cover of a cargo bed of a vehicle, there are some which use, for example, a seat shutter that is vertically wound around the opening to open and close. It had the following structure. That is, for example, a fiber-reinforced resin sheet or hood cloth of the same quality as the warehouse body is used as the material of the shutter body, one end of which is fixed to a take-up shaft that is laid horizontally above the opening, and this take-up shaft is driven by an appropriate drive device. When the shutter body is rotated, the shutter body is wound around the winding shaft when opened, and conversely, when closed, the shutter body is closed by lowering it by its own weight. Of course, in order to promote such a tendency of the shutter body to descend due to its own weight, a cross-shaped metal tube or the like serving as a core is provided in the shutter body.

By the way, in such a closing method,
When closing the shutter main body, it is necessary to brake so that the shutter main body does not rush and fall, and the conventional solution is to use an AC motor as a drive motor and a back electromotive force as a brake. I was trying. By the way, when a seat shutter of this type is used for a vehicle, for example, a vehicle-mounted battery is used to drive the winding shaft, so that most of the driving is performed by a motor driven by DC 24V or 12V.
However, as is well known, in the case of a DC motor, generation of a back electromotive force is basically not expected, and therefore a method of lowering the shutter body by its own weight when pulling down the shutter body cannot be taken. For this reason, of course, there is a method of interposing a worm gear in the middle of the drive system as a general method to prevent free rotation in the reverse rotation direction other than the drive direction. Part of the layout will always intersect 90 °, and a compact design,
For example, it is impossible to design such that a series of driving members and driven members are arranged on a common shaft, or more drastically, a member of a driving system is arranged inside a winding drum.

[0004]

[Technical Items Attempted to Develop] The present invention has been made in consideration of such a background, and is a winding shaft of a shutter which is required to be driven by a DC motor, and which is capable of lowering operation by its own weight. This is an attempt to develop a new mechanism for the winding shaft drive mechanism used in combination, which can avoid free fall when descending.

[0005]

[Constitution of the invention]

[Means for Achieving the Object] That is, the first invention of the winding shaft drive mechanism in the winding type shutter according to the present application is to wind a shutter body which is freely windable and has a tendency to drop by its own weight in the hanging direction. In a device for driving a shaft in a winding and rewinding direction, a DC motor is used as a drive motor for the winding shaft, and a drive-only clutch is interposed between the drive motor and the winding shaft. This drive-dedicated clutch includes a sun gear directly connected to the output shaft of the drive motor, a planet gear that revolves around the sun gear, and a ring gear that is circumscribed around the planet gear, and the ring gear has a fixed ring gear and an output ring gear. It is characterized in that the output side member is connected to the output ring gear by being combined in a state of being divided in the direction.

The second invention of the winding shaft drive mechanism in the winding type shutter according to the present application is that, in addition to the above requirements, the shutter body is configured as a seat shutter for closing a vehicle carrier. It is a feature. The above objects are intended to be achieved by these inventions.

[0007]

According to the present invention, in a drive-only clutch having a mechanism similar to a planetary gear mechanism, the ring gear is axially divided into a fixed ring gear and an output ring gear. Unless rotationally driven by the motor, it acts to cut off rotational torque from the opposite direction. As a result, when the shutter body is lowered in the closing direction, the free fall is blocked, and the shutter is gently lowered in accordance with the drive of the drive motor.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to illustrated embodiments. A slide-type open / close tent T to which the present invention is applied is configured such that a tent frame 2 is attached to a base frame 1 so as to be openable and closable by a drive mechanism 3, and a tent body 4 is covered with the tent frame 2. First, in the embodiment shown in FIG. 1, the base frame 1 is substantially integrated with the bed 11 of the vehicle 10, and the legs 1A thereof are fixed to the bed 11 side by welding, bolting or the like. Of course, the base frame 1 is the loading platform 11
It does not need to be integrated with, and may be removable as shown in FIG.

At this time, for example, the leg portion 1 of the base frame 1
As shown in FIG. 11 (b), A is set to a length slightly lower than the height of the loading platform 11 of the vehicle, and when mounted on the vehicle and moved, it is mounted on the base frame 1 and mounted on the vehicle by a separate fastening member. Pallet type that can be fixed freely, and can be lifted up with an outrigger, crane, forklift, jack, etc., removed from the vehicle and placed directly on the ground such as a parking lot, etc. It can also be configured. Of course, the length of the leg portion 1A is appropriate depending on the type of lift-up, and only the base frame 1 without the leg portion 1A may be used.

Rails 12 are provided on opposite sides of the base frame 1 in the longitudinal direction.
Supports the tent frame 2. Then, as an example, a stopper 13 is provided near the rear end of the loading platform near the side of the rail 12. This is one in which a chain receiving plate 13a is provided on the side of the rail 12 on the side of the base frame 1, and a braking chain 13b, which is an example of the stationary braking segment S ₀ , is attached to the upper surface of the chain receiving plate 13a at a constant pitch. is there. Further, at the rear end of the loading platform 11, a limit switch 15 is provided which comes into contact with a part of the tent frame 2 described later and outputs a signal for stopping the opening / closing movement operation.

The tent frame 2 supported by the base frame 1 as described above will be described below. In this product, an end frame 20 is provided at the front end of the luggage carrier 11, and a movable frame 21 is provided rearward of the product. The movable frame 21 includes a movable intermediate frame 22 and
The movable intermediate frame 22 and the drive frame 23 that constitute the end frame 20 and the movable frame 21 together form a gate shape as an example, and they are as an example. A wheel 22a rolling on the rail 12 and a drive wheel 23a are provided at the lower end. The movable frame 21 is provided with, for example, an X-shaped pantograph-shaped relay link rod 24 between the movable intermediate frame 22 and the drive frame 23, which has a fixed pivot 25 and the movable frame 21. And a lower part of the slide pivot 26 is configured to allow a vertical shift. Reference numeral 24a is an intersection pivot of the relay link rod 24.

Further, an auxiliary support frame 27 is supported on the movable frame 21, which is an example in the embodiment shown in FIG. 4, in which the upper end of the relay link rod 24 is extended linearly further upward. The tent main body 4 is rotatably connected to the adjacent relay link rod 24 at its upper end so that the hanging size of the tent body 4 at the time of contraction can be reduced and a sufficient luggage space (height) can be secured. Is. The auxiliary support frame 27 corresponds to the upper frame of the movable intermediate frame 22 and the like which forms a gate shape and is substantially parallel to the upper frame, and the support portion 27a is located at a slightly lower working height when the tent body 4 is contracted, It has an elevating operation part 27b on its side.
The auxiliary support frame 27 is configured by extending the upper end of the relay link rod 24, but a separate link mechanism or the like may be provided. That is, as shown in FIG. 12, the lifting operation unit 27 is separately provided.
b may be configured.

As will be described later, the auxiliary support frame 27 and the support portion 27a integral therewith raise the support portion 27a when the tent body 4 is contracted to prevent the tent body 4 from hanging down, while the tent body 4 extends. Since it stands by at a slightly lowered position, the standby position is determined in consideration of the hanging position when the tent body 4 is supported. For example, the length of the elevating / lowering operation portion 27b, which is a part of the link mechanism, and the lower end rotation point thereof are determined as shown in FIGS. That is, if the space between the expanded movable frames 21 is 2S and the length of the lifting / lowering operation portion 27b is R, R ≧ 5S / 4, and the lower end pivot point of the lifting / lowering operation portion 27b is the movable frame 21.
R is installed below the bottom of the gate-shaped ceiling. In addition to this embodiment, as a structure for preventing the tent body 4 from hanging down when the tent body 4 is contracted, as shown in FIG. 3 (a), the support portion 27a may be a bifurcated double rod, or further, 1
As shown in FIG. 3 (b), a supporting rod 28 that allows the base portion to rotate is provided in the vicinity of the upper end of the movable frame 21 so as to face each other, and further, as shown in FIG. An open bearing frame 29 can be applied.

Next, the drive mechanism 3 for the tent frame 2 will be described. The drive mechanism 3 substantially includes a braking mechanism for driving the tent frame 2 to open and close, and fixedly maintaining a closed state, an open state, or an intermediate state thereof. First, a drive mechanism housing 30 is provided below the drive frame 23 in the movable frame 21, and as an example, a drive unit base 31 is provided inside the movable frame 21, and a motor, a speed reducer, a brake clutch unit and the like are provided above the drive unit base 31. A drive unit 32 including the same is mounted. The drive wheel 2 is provided below the drive unit 32 as an example.
A drive shaft 33 for driving the drive shaft 3a is rotatably provided, and the rotation is transmitted from a drive sprocket 35 of the drive unit 32 to a driven sprocket 36 provided on the drive shaft 33 via a drive chain 37. Driven by. A braking sprocket 38, which is an example of the movable braking segment S ₁ , is provided at one end of the drive shaft 33. The mounting position of the braking chain 13 is the fixed braking segment S ₀ of the stopper 13 on the base frame 1 side.
It is set on the chain line of b.

Next, the tent main body 4 supported by the tent frame 2 will be described. The tent main body 4 includes a top portion 40 that covers an upper portion and a side portion 41 that is provided so as to hang downward from the top portion 40. An appropriate strap 42 is provided on the inner side of the tent frame 2, and the tent frame 2 is fixed to the end frame 20, the movable frame 21, and the like.

Next, the shutter device 50 which is a member to which the present invention is directly applied by opening and closing the end portion of the slide type open / close tent T will be described. Incidentally, the shutter device 50 itself is not necessarily limited to being applied to the sliding open / close tent, and it is needless to say that the shutter device 50 can also be applied to a general fixedly installed tent warehouse or a general fixed building. However, for example, in the case of a slide-type open / close tent mounted on a vehicle, most of them are DC 24
V or 12V power source is used as the vehicle power source, and the corresponding measures are taken on the assumption that the shutter body 51 of the shutter device 50 is opened and closed by the DC motor. This point will be described below.

In this shutter device 50, for example, a sheet-shaped shutter main body 51 is attached to a take-up drum 52 so that the shutter main body 51 can be taken up freely. For example, these are provided in a shutter box 53 provided above the drive frame 23. It is stored. Further, when the shutter body 51 is pulled out (when it is hung downward), shutter guides 54 for guiding the shutter body 51 are provided inside the pillar portions on both sides of the drive frame 23. The winding drum 52 is driven by the driving device 55 by switching the rotation direction between the winding direction and the unwinding direction of the shutter main body 51. The shutter body 51
A reinforcing bar 56 using a metal pipe or the like is provided horizontally at regular intervals, which is fitted to the shutter guide 54 at both ends, and is configured to be smoothly wound and unwound. ing. Further, the shutter main body 51 need not be in the form of a sheet, and may be a slat type or the like.

Further, when the winding drum 52 is attached to the shutter box 53 which is a supporting member, the winding drum 52 is rotatably supported by the end pieces 57A and 57B, respectively, and one end piece 57A itself. Although it is directly supported on the drive frame 23 side through the bearing 58A, in the drive side end piece 57B, with respect to the motor mount 59 that supports the drive motor M that is the drive source of the drive device 55. And is rotatably supported via a bearing 58B on the drive side. Further, the drive device 55 is mounted in the interior state near one end of the winding drum 52 as shown in FIGS.

The drive device 55 will be described below. First, reference numeral 60 is a motor casing of the drive motor M,
The coil on the fixed side is supported according to a conventional method. This is fixed to the shutter box 53 side integrated with the drive frame 23 via a motor mount 59 provided at one end thereof. In such a motor casing 60, a rotor 61, which is a rotor, is rotatably supported via a motor bearing B in a conventional manner. Although a detailed description is omitted, the drive motor M is a DC motor driven by a DC power supply. Further, naturally, the polarity of power supply to the field coil is switched by switching the relay, but detailed description thereof will be omitted. The rotor 61 has a motor output shaft 62 at its center.

In such a drive motor M, a clutch 6 dedicated for drive is first provided through a substantially cylindrical distance piece 63 having flanges at both ends in a motor casing 60.
5 side, while the motor output shaft 62 is also connected via a coupling 64 to the drive-only clutch 65 side. This drive-only clutch 65 is
In short, whether the rotation direction of the drive motor M is the forward rotation direction or the reverse rotation direction, the rotation is transmitted to the output side only when there is an input from the drive motor M, and there is no input from the input shaft, That is, when a rotational torque is generated on the output side of the drive clutch 65, the rotation is prevented from being transmitted in the opposite direction. Incidentally, the reason why such a configuration is adopted is that the drive motor M is a DC motor,
For example, when the shutter main body 51 is extended, since the counter electromotive force of the drive motor M cannot be expected, no rotational resistance is generated for the winding drum 52, and the shutter main body 51 is shocked at once by its own weight. This is a means for preventing 51 from being fed out.

This drive-only clutch 65 applies a planetary gear mechanism as shown in FIG. 10 (a) as a whole structure, and includes a sun gear 66 and a planet gear 6.
7 and a ring gear 68, respectively. As a characteristic configuration of this embodiment, as shown in FIG. 10 (b), the ring gear 68 includes a fixed ring gear 68A and an output ring gear 68B, which are configured to be divided in the axial direction. The outer casing 69 is placed on the outer peripheral portion of the fixed ring gear 68A.

Next, the internal structure of the drive clutch 65 will be described further. First, the sun gear 66 is attached to the center of the planet gear holder 70 so as to be rotatable independently of the sun gear 66. The holder 70 is provided on each of the input side and the output side. And a pair of front and rear planet gear holders 70
Are both independently supported between the fixed ring gear 68A and the output ring gear 68B via an outer bearing 71, and are rotatably supported by an inner bearing 72 and a sun gear shaft 73, which is the center of the sun gear 66. Has been done. And the fixed ring gear 68
A and the output ring gear 68B have teeth inside thereof, and they are common to the planet gear 67.
Is meshing with. In this meshing structure, the drive-only clutch 65 sets a characteristic number of teeth, and the planet gear 67 has the same number of teeth for both the fixed ring gear 68A and the output ring gear 68B. , Fixed ring gear 68A and output ring gear 6
8B is a slight change in the number of teeth. Specifically, as an example, the number of teeth of the output ring gear 68B is set to be two teeth less than that of the fixed ring gear 68A. Since the fixed ring gear 68A is fixed to the distance piece 63 attached to the fixed motor casing 60, the fixed ring gear 68A is always fixed.

On the other hand, the output ring gear 68B is attached to the side of the connecting boss 74 with its edge cut off from the fixed ring gear 68A, and the connecting boss 74 is fitted in the winding drum 52 in a fixed state. Drum bush 7
The output of the connecting boss 74 serves as a drive source for rotationally driving the winding drum 52. The output ring gear 68B has an output shaft 75 having a spline at the center of its output side, and this one is the drum bush 76.
Fit in the center of. Further, the shaft portion of the drum bush 76 is configured to enter the inside of the outer casing 69, and a bearing 77 is provided between them.

The slide-type opening / closing tent T to which the present invention is applied has a specific structure as described above, and operates as follows. i) Opened state of the tent body For convenience of explanation, the opened state in which the tent body 4 does not cover the luggage carrier 11 will be described as a starting state. At this time, the movable intermediate frame 22 and the drive frame 23 of the movable frame 21 are contracted so as to be in contact with each other, and the drive frame 23 is moved to the front of the luggage carrier 11 as much as possible. Of course, when the above-mentioned stopper 13 is provided so that the drive frame 23 is positioned in this open position, the open state of the tent body 4 is maintained also here.

When the tent body 4 is folded, the top 40 of the tent body 4 is folded so as to hang down between the movable intermediate frames 22, which is the case in this embodiment. This portion is supported by the support portion 27a of the auxiliary support frame 27, and the hanging size is suppressed to a low level, further promoting effective utilization of the storage space of the luggage carrier 11. That is, when the movable intermediate frames 22 come close to each other, the relay link rod 24 is similarly folded, and the support portion 27a, which is the upper end portion of the auxiliary support frame 27 provided in the extended portion thereof, moves upward. As shown in FIG. 4B, the top 40 of the tent body 4 is supported.
Of course, when it is rare to use in such an open state, it is not necessary to provide the stopper 13 at this position.

Ii) Expansion of the tent body When the tent body 4 is expanded in such a state, the drive unit 32 is operated and the drive shaft 33 is rotated by a switching operation for appropriate power supply. That is, the rotation of the drive unit 32 is transmitted from the drive chain 37 to the drive shaft 33. This rotation is the drive wheel 2
With the rotation of 3a, the drive wheel 23a rolls on the rail 12. As a result, the drive frame 23 moves to the rear of the loading platform 11 and sequentially opens the tent body 4.

When the drive frame 23 reaches the rear end of the luggage carrier 11, a part of the drive frame 23 presses the limit switch 15, thereby cutting off the drive power source of the drive unit 32 and stopping its movement. At this time, the braking sprocket 3 provided on one end of the one drive shaft 33
8 is in a state of meshing with the braking chain 13b in the stopper 13 provided on the loading platform 11 which is the base frame 1. When the drive in the drive unit 32 is stopped, the drive shaft 3 is positively driven by the brake unit or the like.
In addition to stopping the rotation of 3, usually drive unit 3
The rotation is stopped in a state where normal and reverse rotation cannot be performed by the action of the speed reduction mechanism to which the worm gear mechanism incorporated in 2 is applied. In this state, the braking sprocket 38, which is prevented from rotating, meshes with the braking chain 13b,
The drive frame 23 is in a locked state so as not to move. Incidentally, the engagement between the braking sprocket 38 and the braking chain 13b is such that a slight slack is provided on the braking chain 13b side and the receiving side, that is, the front side of the loading platform 11 is slightly lowered so that the braking sprocket 38 and the braking chain 13b are engaged with each other. Is smoothly performed (see FIG. 5).

As will be understood from the above description, in the method for maintaining the open / closed state of the slide type open / close tent T in this embodiment, the fixed side braking segment S ₀ and the movable side braking segment S ₁ are engaged and fixed. Each braking segment S is characterized by being performed by
₀ , S ₁ are the braking chain 13b and the braking sprocket 38
It is not limited to the combination with. For example, as shown in FIG. 14A, the rack 45A is used as the fixed-side braking segment S _0.
Alternatively, a gear 45B meshing with the movable side braking segment S ₁ may be applied, or a toothed belt 46A and a toothed pulley 46B may be similarly applied as shown in FIG. 14B. However, the combination of the braking chain 13b and the braking sprocket 38 can be expected to smoothly engage with the braking sprocket 38 by providing a slight slack on the braking chain 13b side, while the rack 45A and the gear 45B are Combination and toothed belt 4
Since it is difficult to expect smooth meshing (starting) with the combination of 6A and the toothed pulley 46B, it is preferable to additionally provide a buffer mechanism.

Next, the operating state of the shutter device 50 according to the present invention will be described. i) Winding of the shutter main body First, the initial state is a state in which the shutter main body 51 is completely drawn out and an appropriate opening is closed. In this state, the motor M is driven by an appropriate switching operation of the operator. In this drive state, for example, if the winding direction is a direction in which the winding drum 52 rotates clockwise, for example, when viewed from the side of the drive device 55, the winding direction is the drive motor M. . When this is done, the motor output shaft 62 of the drive motor M rotates counterclockwise as shown in FIG.
Sun gear 66 in the clutch 65 exclusively for driving through
In contrast, it causes counterclockwise rotation. In such a state, since the planet gear 67 meshed with the sun gear 66 is also meshed with the fixed ring gear 68A, the planet gear 67 revolves counterclockwise as a whole while rotating clockwise. On the other hand, the output ring gear 68B, which is not fixed, rotates in the clockwise direction by receiving the reaction force for supporting the rotation of the planet gear 67. At this time, the reaction force received by the output ring gear 68B is different from the reaction number received by the fixed ring gear 68A and the output ring gear 68B because the number of teeth of the fixed ring gear 68A is different from that of the output ring gear 68B. Is a force due to the fact that the thickness is increased on the output ring gear 68B side and the error is gradually accumulated and sent, and this reaction force causes the driving force. This rotation is the clockwise rotation of the connecting boss 74, and is finally output as the force for rotating the winding drum 52 from the drum bush 76. When the shutter body 51 is completely wound up after such winding, the operation is detected by an appropriate limit switch and the power supply to the drive motor M is stopped.

Ii) Unwinding of Shutter Main Body When unwinding the shutter main body 51 thus wound, the following operation is performed. First, since the shutter main body 51 is provided with the reinforcing bar 56 such as a metal pipe, the rotor 61 in the drive motor M freely rotates when the power is not supplied to the drive motor M, and therefore the shutter main body 51 is not changed. It will be in the extended state. Incidentally, this state is a phenomenon that is similarly exposed when the open state is maintained after the winding of the shutter main body 51 is completed. However, even in such a state, the rotation of the take-up drum 52 in the feeding direction is prevented in the drive-only clutch 65. That is, the torque for rotating the take-up drum 52 accompanying the lowering of the shutter body 51 due to its own weight is transmitted to the output ring gear 68B and tends to rotate counterclockwise. At this time, the planet gear 6 meshing with the ring gear 68
On the other hand, 7 is in a state of meshing with the fixed ring gear 68A, the teeth of the planet gear 67 are
There is a barbed lock between A and the output ring gear 68B. As described above, the reverse rotation from the output ring gear 68B side does not occur in any rotation direction. In such a state, the winding drum 52 is turned counterclockwise to rotate the shutter main body 51.
Even in the case where the output ring gear 68 is delivered, the output ring gear 68 rotates only when the rotation from the drive motor M is transmitted, and the winding drum 52 rotates in the counterclockwise direction, similarly to the above-described action.

Incidentally, the drive-dedicated clutch 6 described here is used.
No. 5 has been devised as a new structure in itself, and can be evaluated as a general-purpose mechanism that can be diverted to other appropriate uses. For example, it can be used as a speed reduction mechanism in hoist cranes, chain blocks, etc.
It can be used as a transmission reduction mechanism when arranging a large number of extremely small high reduction ratio units on the same axis as the take-up shaft for threads, or as a take-up shaft drive unit for curtains, blinds, curtains, etc. Further, it is used as a speed reducer unit of a working mechanism that uses a DC electric motor as a drive source, or as a speed reducer unit of a window opening / closing mechanism of an automobile or other vehicle, and a roller (for example, a conveyor roller) driven by a DC electric motor. It can be used as a drive speed reduction unit of the above, or, in short, it can be used to transmit a sufficiently decelerated rotation at the time of driving to the output side, while the reverse rotation input from the output side can be used for a transmission system path that needs to be shut out.

[0032]

Other Embodiments The present invention is one in which the above-mentioned embodiment is a representative one, but the technical idea of the present invention includes the following modified embodiments. First, the stop position of the drive frame 23 is the rear end portion in the previous embodiment, but by providing the stopper 13 at an appropriate position, for example, the tent body 4 is fully opened, or as shown in FIG. As shown in (), the drive frame 23 can be stopped at an appropriate position such as a state of being opened.

As shown in FIG. 3, the tent body 4 and the tent frame 2 have a gate-like shape, and cover the side surface and the top surface of the luggage carrier 11. For example, as shown in FIG. The top portion 40 may be of a hard top type in which an aluminum panel or the like is stretched, and the side portion 41 may be of a type in which the tent body 4 opens and closes in a bellows-like manner.

The drive frame 23 is the tent frame 2
Although it is provided on the rear end side, the end frame 20 provided on the front end as shown in FIG. 15C may be driven. Further, when the sliding type tent T has a long opening / closing direction, a drive frame may be provided in the middle as well.

Further, the movable frame 21 including the drive frame 23 is supported on the rail 12 at the lowermost end thereof. However, as shown in FIG. 16, in the case of a two-stage loading platform 11, for example, an intermediate stage. It is of course possible to provide rails on the platform 11 and leave the lower end side in a free state.

Still another embodiment is shown in FIG.
As shown in (c), the braking mechanism based on the meshing between the braking sprocket 38 and the braking chain 13b may be arranged in a reverse arrangement. That is, the braking sprocket 17 to which the braking chain 13b, which is the stationary braking segment S ₀ on the side of the base frame 1, is fixed.
It does not matter if the drive chain 37, which is the movable side braking segment S _1, is meshed with the driving chain 37 instead of the circular shape (the shape may be a fan shape).

This also applies to the toothed belt 46A, the toothed pulley 46B and the rack 45A which are selected as the fixed braking segment S ₀ and the movable braking segment S _1.
The same applies to the relationship between the gear and the gear 45B. In the above-described embodiment, the slide opening / closing tent T is applied to the loading platform 11 of the vehicle 10. However, in addition to such a vehicle, a warehouse or garage fixed on the ground as shown in FIG. The same can be applied to a work place, or even a work place provided on the rooftop of a building shown in FIG.

[0038]

The present invention has the above-described structure, and even in the shutter body having a tendency to hang down by its own weight, the free-fall is blocked by the drive-dedicated clutch, and the rotation of the drive motor follows. It is possible to perform a gentle opening / closing operation.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment in which the present invention is applied to a vehicle-mounted slide-type opening / closing tent.

FIG. 2 is a perspective view showing a state in which the inside of the tent is seen from the rear end side of the same.

FIG. 3 is a front view showing a supported state of a tent body with respect to a tent frame.

FIG. 4 is a side view of the same as above showing a support state thereof divided into a stretched state and an open state.

FIG. 5 is a side view showing a drive mechanism provided at a lower end of a drive frame below a shutter device to which the present invention is directly applied.

FIG. 6 is a front view of the same.

FIG. 7 is a front view showing a shutter device partially broken away.

FIG. 8 is a plan view of the same.

FIG. 9 is a vertical cross-sectional side view showing an enlarged drive device.

FIG. 10 is a skeletal cross-sectional view and a longitudinal side view showing an enlarged drive-only clutch.

11A and 11B are a side view and a rear view showing two types of embodiments in which a base frame and a luggage carrier are detachable.

FIG. 12 is a side view showing another embodiment in which the configuration of the auxiliary support frame is different, divided into an expanded state and an open state.

13A and 13B are a side view and a perspective view showing various examples of another hanging structure for the tent body.

FIG. 14 is a vertical cross-sectional side view showing two types of embodiments in which the configurations of a fixed side braking segment and a movable side braking segment are different from each other, and a side view showing an example in which the operations of both are reversed.

FIG. 15 is a perspective view showing an example in which the stop position of the drive frame and the configurations of the tent body and the tent frame are different and an example in which the end frame side is driven.

FIG. 16 is a front view showing an embodiment in which the movable frame is supported differently.

FIG. 17 is a perspective view showing an embodiment in which the present invention is applied to a tent warehouse for fixing on the ground.

FIG. 18 is a perspective view showing an embodiment in which the present invention is applied to a tent warehouse for rooftop mounting of a building.

[Explanation of symbols]

1 Base Frame 1A Leg 2 Tent Frame 3 Drive Mechanism 4 Tent Main Body 10 Vehicle 11 Bed 12 Rail 13 Stopper 13a Chain Support Plate 13b Braking Chain 15 Limit Switch 17 Braking Sprocket 20 End Frame 21 Movable Frame 22 Movable Intermediate Frame 22a Wheel 23 Drive frame 23a Drive wheel 24 Relay link rod 24a Intersection pivot 25 Fixed pivot 26 Slide pivot 27 Auxiliary support frame 27a Support part 27b Lifting operation part 29 Support frame 30 Drive mechanism housing 31 Drive unit base 32 Drive unit 33 Drive shaft 35 Drive sprocket 36 Driven sprocket 37 Braking Chain 38 Braking Sprocket 40 Top 41 Side 42 Strap 45A Rack 5B gear 46A toothed belt 46B toothed pulley 50 shutter device 51 shutter body 52 winding drum 53 shutter box 54 shutter guide 55 drive device 56 reinforcing bar 57A end piece 57B end piece 58A bearing 58B bearing 59 motor mount 60 motor casing 61 rotor 62 motor output shaft 63 distance piece 64 coupling 65 drive clutch 66 sun gear 67 planet gear 68 ring gear 68A fixed ring gear 68B output ring gear 69 outer casing 70 planet gear holder 71 outer bearing 72 inner bearing 73 sun gear shaft 74 connection boss 75 output Shaft 76 Drum bush 77 Bearing B Motor bearing M Drive motor R Length of lifting operation part The length S of the half pitch between the movable frame S expanded ₀ stationary brake segments S ₁ movable brake segment T sliding type gate Tent

Claims (2)

[Claims] 1. A device for driving a winding shaft of a shutter body in a winding and rewinding direction, which is freely windable and has a tendency to drop by its own weight in a hanging direction, wherein a drive motor for the winding shaft is A direct-current motor is used, and a drive-dedicated clutch is interposed between this drive motor and the take-up shaft. This drive-dedicated clutch revolves around the sun gear directly connected to the output shaft of the drive motor and its surroundings. A planet gear and a ring gear circumscribing the planet gear are provided, and the ring gear is formed by combining a fixed ring gear and an output ring gear in an axially divided state, and an output side member is connected to the output ring gear. A winding shaft drive mechanism in a winding shutter, which is characterized in that 2. The winding shaft drive mechanism in a winding shutter according to claim 1, wherein the shutter body is configured as a seat shutter that closes a vehicle carrier.