JPH1136704A - Automatic gate door opening/closing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic gate door opening device at a low production cost having good assembly workability while reliably performing gate door opening and closing operation. SOLUTION: A gate door 1 made with frame members connected rigidly has a plurality of wheels 2 and moves on a rail during opening and closing. The automatic opening device is equipped with a chain 13 attached the gate door 1 through a mounting bracket 11 and extended over the whole length of the gate door 1, a motor housed in a case 21 installed near the truck, and a sprocket 37 installed to a shaft for outputting the rotation power of the motor and interlocked with the chain 13 attached to the shaft. The mounting bracket 11 comprises an upper side horizontal portion 11b extending in a horizontal direction from the upper edge of a vertical portion fixed to the gate door 1, a lower side horizontal portion extending in a horizontal direction from the lower edge of the vertical portion, and a flange portion 11d extending upward from the tip of the lower side horizontal portion. A chain housing portion 11e is formed at the upper side horizontal portion 11b. The lower side horizontal portion and the flange portion 11d cover the sprocket 37 from lower side at the interlocking place between the chain 13 and sprocket 37 and the tip of the flange portion 11d is located close to the shaft portion of the sprocket 37.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic opening and closing device for automatically opening and closing a gate formed by rigidly connecting frame members.

[0002]

2. Description of the Related Art Generally, gates provided at entrances and the like of relatively wide frontage sites are formed by rigidly connecting frame members and having a plurality of wheels at lower ends thereof, and are manually or automatically moved along a track. It is designed to run and be opened and closed. In recent years, the demand for automatic opening and closing has been increasing.

[0003] Conventionally, as a device for automatically opening and closing this type of gate, a rack extending substantially over its entire length is provided at the lower portion of the gate, and a case containing a motor or the like is installed near the track. It is known that a pinion gear meshing with the rack is mounted on an output shaft protruding from the inside of the case to the outside, and the pinion gear is rotated by operation of a motor to open and close the gate through the rack.

[0004]

However, in the above-mentioned conventional automatic opening / closing device, a rack must be provided over substantially the entire length of the gate, and the length of the rack becomes very long. For this reason, it is necessary to divide the rack into a plurality of parts for manufacturing reasons, but it is not easy to linearly and accurately attach the plurality of divided racks to the side of the gate, and there is a problem that the work is troublesome. .

When the gate is formed to be curved in the width direction for the purpose of improving the appearance and the gate is opened and closed by running on a circular arc-shaped track, the rack must be connected to the gate. Although it is necessary to form an arc corresponding to the shape, there is a problem that the product cost is high.

On the other hand, there is a telescopic type as a gate provided at an entrance or the like whose frontage is relatively narrow. In this telescopic gate, a fixed pillar and a free end frame having wheels at the lower end are vertically arranged and opposed to each other, and a plurality of intermediate frames are vertically arranged between the fixed pillar and the free end frame. The fixed column, the free end frame and the intermediate frame are connected by a pantograph link. As this type of automatic gate opening / closing device, for example, as disclosed in Japanese Patent Application Laid-Open No. 7-293108, a sprocket driven by a motor is arranged on the fixed column side, and a push-pull chain is attached to the sprocket. Wrap and engage, attach one end of the push-pull chain to the free end frame, pull the push-pull chain toward the fixed column by operating the motor, fold the pantograph link, open the gate, and send out the push-pull chain It is known that the gate is closed by extending a pantograph link. However, such an automatic opening / closing device cannot be used as it is for a gate which is formed by rigidly connecting frame members as described above and which is provided at a relatively wide entrance. In other words, since the gate of the frame material is large and heavy, it cannot be moved by pushing with a push-pull chain.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide a product having good assembling operability while reliably opening and closing a gate formed by rigidly connecting frame members. An object of the present invention is to provide an automatic opening / closing device at low cost.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is provided with a plurality of wheels at a lower end of a gate formed by rigidly connecting a frame member, and the entire gate is placed on a track. As an automatic gate opening / closing device that opens and closes by running along, a chain provided over substantially the entire length of the gate, and a motor housed in a case installed near the track,
A sprocket mounted on a shaft for outputting the rotational force of the motor and meshing with the chain.
As a result, the sprocket is rotated by the operation of the motor, and the gate is opened and closed by the pulling in or sending out of the chain. In this case, the chain is attached to the gate at a plurality of positions, and the chain moves integrally with the gate while changing the meshing position with the sprocket by rotation of the sprocket, so that the chain is similar to the case where the conventional rack and the pinion gear mesh. The gate can be reliably opened and closed. Moreover,
The chain can be easily and inexpensively prepared from commercially available products having a length corresponding to the entire length of the gate, and can be easily attached to the gate.

The invention according to claim 2 provides a preferable structure for attaching the chain to a gate. That is, a mounting bracket extending substantially over the entire length is attached to the lower part of the gate. The mounting bracket includes a vertical portion fixed to the gate, an upper horizontal portion extending horizontally from an upper edge of the vertical portion, a lower horizontal portion extending horizontally from a lower edge of the vertical portion, And a flange portion extending upward from the tip of the horizontal portion. The chain is held on the upper horizontal portion with the engagement surface with the sprocket facing downward. The lower horizontal portion and the flange portion are provided so as to cover the sprocket from the lower side at a point of engagement between the chain and the sprocket, and the tip of the flange portion is provided near the shaft portion of the sprocket. As a result, the sprocket is always covered by the mounting bracket not only at the upper side, which is the side meshing with the chain, but also at the side during rotation, so that foreign matter is prevented from entering the meshing portion between the sprocket and the chain. Biting can be prevented. In addition, the displacement of the sprocket away from the chain at the meshing portion between the sprocket and the chain is prevented by the contact between the shaft of the sprocket and the tip of the flange of the mounting bracket over the entire length of the chain. It does not come out of engagement.

According to a third aspect of the present invention, in the above-mentioned chain mounting structure, a chain storage portion for storing and holding the chain over its entire length is formed in the upper horizontal portion of the mounting bracket. A slit into which the tip of the sprocket can be inserted is formed over the entire length of the lower surface of the sprocket. Accordingly, when the chain is mounted on the upper horizontal portion of the mounting bracket, the chain is inserted from the end of the chain storage portion of the upper horizontal portion, and both ends of the chain are screwed in the chain storage portion. Installation can be performed easily.

The inventions according to claims 4 and 5 both provide preferred forms of the chain driving section. That is, the invention according to claim 4 has a configuration in which an electromagnetic brake for braking the rotation of the motor is housed in the case, and the electromagnetic brake is provided so as to make the rotation of the motor free when power is not supplied. Thereby, the gate can be stopped at a predetermined position such as a fully closed position or a fully opened position by the operation of the electromagnetic brake. In addition, at the time of a power failure, the electromagnetic brake makes the motor rotation free, so that the gate is manually opened and closed. be able to.

The invention according to claim 5 is configured such that a limit switch for detecting the fully open position and the fully closed position of the gate from the rotation speed of the motor is housed in the case. This makes it possible to appropriately control the operation of the motor and thus the automatic opening and closing of the gate based on the detection signal of the limit switch. In addition, since the limit switch is housed in the same case as the motor, wiring such as lead wires can be easily performed. In particular, when the invention according to claim 5 is applied to the automatic gate opening / closing device according to claim 4, even if the gate is manually opened / closed at the time of a power failure or the like, the gate is set by the fully open / fully closed position and the limit switch. Since the relationship with the set position does not change, maintenance and the like become easy. That is, when the gate is manually opened and closed, the electromagnetic brake automatically makes the motor rotation free in the event of a power outage, and in the absence of a power outage, the power is turned off by a breaker first, so that the motor rotation becomes free as in the case of a power outage . Then, when the gate is manually opened and closed in this state, the motor rotates freely with the opening and closing movement of the gate. Therefore, these positions set by limit switches that detect the fully open and fully closed positions of the gate from the number of rotations of the motor. There is no deviation between the position and the actual fully open / closed position of the gate.

The invention according to claim 6 corresponds to a case where the track is formed into an arc-shaped curve for the purpose of improving the appearance as described above, and the gate is formed to be curved in the width direction corresponding to the track. In addition to the constituent features of the invention according to claim 1, the chain is attached along the curved surface of the gate with the engagement surface with the sprocket turned sideways. In this case, since the chain has flexibility on the meshing surface side of the sprocket and can be easily curved along the curved surface of the gate, it is necessary to use a commercially available chain. Can be.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 3 show an automatic gate opening / closing device according to a first embodiment of the present invention. Reference numeral 1 denotes a gate for opening / closing an entrance of a relatively wide site with a frontage W.
Is to arrange a metal outer frame (that is, upper frame 1a, lower frame 1b and left and right side frames 1c, 1c) in a rectangular shape and arrange a plurality of vertical frames 1d, 1d,. A metal panel 1e, 1e,... Is mounted inside these frame members 1a to 1d while being rigidly connected by welding.
2 are provided. The gate 1 is a panel 1e.
Instead of using, the vertical frames 1d may be arranged in a grid pattern.

A running rail 3 made of an angle material is buried on a track on which the wheels 2 of the gate 1 run, with the corners thereof being exposed. At one end of the entrance, a fixed column 4 is provided vertically on an extension of the above-mentioned track, and at the other end of the entrance, a gate guide column 5 and a switch 6 are sandwiched by a track or traveling rail 3. Are installed facing each other. The upper frame 1a of the gate 1 is provided above the gate guide column 5.
Rollers 7, 7 for guiding the sheet from both sides
(Only the back guide roller is shown in the figure). The total length L of the gate 1 is set to be larger than the frontage W, and as shown by the solid line in FIG. 3, the fully closed position where the left side frame 1c of the gate 1 contacts the fixed column 4 is the same as the side frame 1c. The gate 1 moves between the fully open position where the gate retracts to the position indicated by the imaginary line k in the figure.
The whole travels along the traveling rail 3 by the operation of the switchgear 6.

The back side of the lower frame 1b of the gate 1 (switch 6
A mounting bracket 11 extending substantially over the entire length is mounted on the side (opposite side). The mounting bracket 1
A vertical part 11a is formed by extruding a metal such as aluminum or an alloy thereof by extrusion or the like. The vertical part 11a is fixed to the lower frame 1b of the gate 1 by screws or the like.
an upper horizontal portion 11b extending horizontally from an upper edge of the vertical portion 11a, a lower horizontal portion 11c extending horizontally from a lower edge of the vertical portion 11b, and a flange portion 11d extending upward from a tip of the lower horizontal portion 11c. have. The upper horizontal portion 11
In FIG. 2B, a chain storage portion 11e having a rectangular closed cross section is formed over the entire length of the mounting bracket 11, and a slit 12 through which the tooth tip of a sprocket 37 described later can be inserted is formed on the lower surface of the chain storage portion 11e. It is formed.
A row of roller chains 13 is accommodated in the chain accommodating portion 11e over the entire length in a state where the meshing surface with the sprocket 37 faces the slit 12 and faces downward, and both ends of the roller chain 13 are 14 screws each
The upper horizontal portion 1 of the mounting bracket 11 by a fastener such as
1b. The lower horizontal portion 11c and the flange portion 11d are formed by the roller chain 13 and the sprocket 3
The sprocket 37 is provided so as to cover the sprocket 37 from below at a point where the sprocket 37 meshes with the sprocket 7, and the tip of the flange portion 11d is provided near the shaft portion 37a of the sprocket 37.

On the other hand, the switchgear 6 houses an electric motor 22, an electromagnetic brake 23, a reduction gear mechanism 24, a limit switch 25 and the like in a case 21, as shown in FIG. And a cover 27. The electric motor 22 is an induction motor that can rotate forward and backward, and an electromagnetic brake 23 is connected to one end of a motor shaft 22a. The electromagnetic brake 23 is provided so as to brake the rotation of the electric motor 22 when energized and to make the rotation of the electric motor 22 free when not energized.

The reduction gear mechanism 24 includes a drive gear 31 formed at the other end of the motor shaft 22a, a first intermediate gear 33 which is rotatably mounted on the intermediate shaft 32 and always meshes with the drive gear 31, A second intermediate gear 34 is rotatably mounted on the intermediate shaft 32 in parallel with the first intermediate gear 33, and a driven gear 36 is rotatably integrated on the output shaft 35 and always meshes with the second intermediate gear 34. ing. The output shaft 3
One end of the shaft 5 extends out of the case 21, and a sprocket 37 is rotatably mounted on the extended end thereof, while a timing gear 38 is rotatably mounted on the other end of the output shaft 35. ing. The above limit switch 25
Has a gear 25a that meshes with the timing gear 38, and measures the rotation speed of the electric motor 22 in the forward rotation direction or the reverse rotation direction by measuring the rotation speed of the gear 25 with a counter (not shown) or the like. The fully open position and fully closed position of the gate 1 are detected from the measured motor rotation speed. The detection signal of the limit switch 25 is
The data is input to a control panel (not shown) accommodated in the control unit 1 and is used for controlling the electric motor 22 and the electromagnetic brake 23 by the control panel.

Next, the operation and effect of the first embodiment will be described. When the electric motor 22 is operated, its rotational force is transmitted to the sprocket 37 on the output shaft 35 via the reduction gear mechanism 24, and the sprocket is rotated. As the sprocket 37 rotates, the roller chain 13 on the side of the gate 1 meshing with the sprocket 37 is drawn in or sent out with reference to the opening / closing device 6, whereby the gate 1 moves along the traveling rail 3. To open and close automatically and reliably. Moreover, the total length L of the gate 1
When the roller chain 13 is considerably long, the roller chain 13 having a length corresponding to the length can be easily prepared from commercially available products, so that the cost can be reduced and the roller chain 13 can be moved along the side surface of the gate 1. It can also be easily installed in a straight line. Particularly, in the present embodiment, the roller chain 13 is connected to the gate 1 via the mounting bracket 11.
When mounting on the upper bracket 1 of the mounting bracket 11
1b, a chain storage portion 11e is formed, a roller chain 13 is inserted from an end of the chain storage portion 11e, and both ends of the roller chain 13 are fastened with screws 14 in the chain storage portion 11e. Therefore, the assembling workability can be greatly improved.

In addition, the mounting bracket 11 not only covers the upper horizontal portion 11b holding the roller chain 13 from above the sprocket 37, but also covers the lower horizontal portion 11c.
And the flange portion 11d also covers from below the sprocket 37, so that the sprocket 13 and the roller chain 1 are covered.
It is possible to prevent foreign matter from being caught in the meshing portion with the third member. Further, since the tip of the flange portion 11d is provided near the shaft portion 37a of the sprocket 37, when the gate 1 is displaced upward during opening and closing of the gate 1, the engagement between the sprocket 37 and the roller chain 13 is increased. Before disengagement, the distal end of the flange portion 11d contacts the shaft portion 37a of the sprocket 37 and the upward displacement of the gate 1 is regulated, so that the sprocket 37 and the roller chain 13 can be reliably prevented from disengaging. it can.

Further, since the rotation of the electric motor 22 is braked by the electromagnetic brake 23, the gate 1 can be reliably stopped at a predetermined position such as a fully closed position or a fully opened position. Is provided so as to make motor rotation free, so that the gate 1 can be opened and closed manually. Further, since the control of the electric motor 22 and the electromagnetic brake 23 is performed based on the detection signal of the limit switch 25, the automatic opening and closing of the gate 1 can be appropriately controlled.
Since the fully closed position and the fully opened position of the gate 1 are detected from the number of rotations of the electric motor 22 and housed in the same case 21 of the switchgear 6 as the electric motor 22, wiring such as lead wires can be easily performed. Can be.

In addition, when the gate 1 is manually opened / closed, the electromagnetic brake 23 automatically makes the motor free as described above at the time of a power failure, and the power supply is firstly cut off by a breaker (not shown) at the time of a non-power failure. As a result, the motor rotation is set to free as in the case of a power failure. When the gate 1 is manually opened and closed in this state, the electric motor 22 rotates freely with the opening and closing movement of the gate 1. Therefore, the limit switch 25 which detects the fully open / fully closed position of the gate 1 from the rotation speed of the electric motor 22. There is no deviation between these positions set in (1) and the actual fully open / fully closed position of the gate 1. Therefore, even if the gate 1 is manually opened and closed at the time of a power failure or the like, the relationship between the fully opened / closed position of the gate 1 and the position set by the limit switch 25 does not change, so that maintenance or the like can be easily performed. .

In the first embodiment, when the roller chain 13 is mounted on the gate 1 via the mounting bracket 11, a chain storing portion 11e is formed in the upper horizontal portion 11b of the mounting bracket 11, and the chain storing portion 11e is formed. 11e
The roller chain 13 is inserted from the end of the roller chain 13 and both ends of the roller chain 13 are screwed into the chain accommodating portion 11e. However, the present invention is intended to simplify the structure of the mounting bracket 11. For example, as shown in FIG. 5, in the upper horizontal portion 11 b of the mounting bracket 11, the roller chain 13 is formed with the engagement surface with the sprocket 37 facing downward without forming a chain storage portion, and in the full length direction of the gate 1. Needless to say, it may be fastened by bolts 41 or the like at predetermined intervals.

FIGS. 6 and 7 show an automatic gate opening / closing apparatus according to a second embodiment of the present invention. In the case of the second embodiment, the track 51 is an arc-shaped curve, and the gate 52 is formed to be curved in the width direction (length direction) corresponding to the track 51.

On the back side (radially inside) of the gate 52, a roller chain 53 extending over substantially the entire length thereof is screwed with a screw 55 at predetermined intervals with the meshing surface with the sprocket 54 turned sideways. Installed. On the other hand, a switch 56 is installed near the track 51,
Although not shown, the switch 56 houses a motor and the like in a case 57, and an output shaft 58 for outputting the rotational force of the motor projects vertically out of the case 57. A sprocket 54 that meshes with the roller chain 53 is mounted so as to rotate integrally.

When the motor operates, the sprocket 54 rotates, and the gate 52 meshes with the sprocket 54.
When the roller chain 53 on the side is drawn in or sent out with reference to the opening / closing device 56, the gate 52 runs on the arc-shaped orbit 51 and opens and closes automatically. In this case, the roller chain 53 has flexibility on the side of the meshing surface with the sprocket 54 and can be easily curved along the side surface of the gate 52, so that a commercially available roller chain is used. And cost reduction can be achieved.

[0028]

As described above, according to the automatic gate opening / closing device of the present invention, the chain provided over substantially the entire length of the gate is pulled in or sent out by the sprocket, whereby the gate can be automatically opened / closed reliably. The cost can be reduced by using a commercially available chain, the chain can be easily attached to the gate, and the assembling workability can be improved.

In particular, according to the second aspect of the present invention, since the sprocket is covered by the mounting bracket for attaching the chain to the gate, foreign matter can be prevented from being caught in the meshing portion between the sprocket and the chain. In addition, the sprocket can be prevented from being disengaged from the chain.

In the invention according to claim 3, when the chain is mounted on the upper horizontal portion of the mounting bracket, the chain is inserted from the end of the chain storage portion of the upper horizontal portion,
By mounting both ends of the chain in the chain storage portion with screws or the like, mounting can be performed easily, and an effect of further improving the assembling workability can be achieved.

According to the fourth aspect of the present invention, the gate can be reliably stopped at a predetermined position such as a fully closed position or a fully opened position by the electromagnetic brake. The gate can be opened and closed manually, which is very effective in preventing power outages.

In the invention according to claim 5, the automatic opening and closing of the gate can be appropriately controlled based on the detection signal of the limit switch, and the limit switch is housed in the same case as the motor. Wiring can be easily performed. In particular, when the present invention is applied to the automatic gate opening / closing device according to claim 4, even when the gate is manually opened / closed at the time of a power failure or the like, the gate is fully opened / closed and the position set by the limit switch. Since the relationship does not change, there is an effect that maintenance or the like can be easily performed.

In the invention according to claim 6, when the track is formed into an arc-shaped curve and the gate is formed to be curved in the width direction corresponding to the track, the chain is connected to the sprocket along the curved surface of the gate. By mounting with the engagement surface sideways, implementation can be ensured using a commercially available chain.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along line XX of FIG.

FIG. 2 is an arrow view as viewed from a Y direction in FIG. 3 (B).

3A and 3B show an entire configuration of an automatic gate opening / closing device according to a first embodiment of the present invention, FIG.
(B) is a front view.

FIG. 4 is a side view in which a part of a switch, which is a component of the automatic switching device, is cut away.

FIG. 5 is a view showing another embodiment of the roller chain mounting structure.

FIG. 6 is a schematic diagram showing an entire configuration of an automatic gate opening / closing device according to a second embodiment of the present invention.

FIG. 7 is an arrow view taken along the line ZZ in FIG. 6;

[Explanation of symbols]

 1,52 Gate 1a Upper frame (frame material) 1b Lower frame (frame material) 1c Side frame (frame material) 1d Vertical frame (frame material) 2 Wheels 3 Running rail (track) 6,56 Switch 11 Mounting bracket 11a Vertical Part 11b Upper horizontal part 11c Lower horizontal part 11d Flange part 11e Chain storage part 12 Slit 13,53 Roller chain 21,57 Case 22 Electric motor 23 Electromagnetic brake 25 Limit switch 35,58 Output shaft 37,54 Sprocket 51 Track

Claims (6)

[Claims] 1. An automatic gate opening / closing device, wherein a plurality of wheels are provided at a lower end of a gate formed by rigidly connecting a frame member, and the entire gate is moved along a track to open and close. A chain provided over substantially the entire length, a motor housed in a case installed near the track, and a sprocket mounted on a shaft for outputting a rotational force of the motor and meshing with the chain. Automatic gate opening and closing device characterized by the above-mentioned. 2. A mounting bracket extending substantially over the entire length of the gate is attached to a lower portion of the gate, and the mounting bracket includes a vertical portion fixed to the gate and an upper portion extending horizontally from an upper edge of the vertical portion. A horizontal portion, a lower horizontal portion extending horizontally from a lower edge of the vertical portion, and a flange portion extending upward from a tip of the lower horizontal portion. The lower horizontal portion and the flange portion are provided so as to cover the sprocket from the lower side at a meshing point between the chain and the sprocket, and the flange portion is provided. 2. The automatic gate opening / closing device according to claim 1, wherein a tip of the gate is provided near a shaft portion of the sprocket. 3. An upper horizontal portion of the mounting bracket is formed with a chain storage portion for storing and holding a chain over its entire length, and a slit into which a sprocket tooth tip can be inserted is formed on a lower surface of the chain storage portion. 3. The automatic gate opening / closing device according to claim 2, wherein is formed over the entire length. 4. An electromagnetic brake for braking the rotation of the motor is housed in the case, and the electromagnetic brake is
The automatic gate opening / closing device according to any one of claims 1 to 3, wherein the automatic rotation of the gate is provided so that rotation of the motor is free when power is not supplied. 5. A gate according to claim 1, wherein a limit switch for detecting a fully open position and a fully closed position of the gate based on the number of rotations of the motor is accommodated in the case. apparatus. 6. The track is an arc-shaped curve, the gate is formed to be curved in the width direction corresponding to the track, and the chain meshes with the sprocket along the curved surface of the gate. 2. The automatic gate opening / closing device according to claim 1, wherein the device is mounted with the surface turned sideways.