JP2023107391A - Rotation following type automatic door - Google Patents

Abstract

To provide a rotation automatic door which realizes an in-device outer atmosphere shielding device of a continuous production facility in a minimum requirement space, improves the work efficiency of painting processing and the like and achieves cost reduction.SOLUTION: Rotatable rotation automatic doors 2 are respectively arranged on a plurality of arms 1 that are radially provided, the rotation automatic door 2 is rotatable while keeping the fixed direction all the time following rotation of the arm 1, a shielding space S of a workpiece 3 is formed inside with the rotation automatic door 2 that shields on the front side and rear side of the workpiece 3 that enters while the arm 1 is rotated, transportation conveyors 4 which make the workpiece 3 enter the left and right shielding spaces S formed while the rotation automatic door 2 is rotated are provided in different two routes R1, R2 in the straight line shape with respect to the shielding space S and having opposite directions, and the workpiece 3 is made to continuously enter each shielding space S.SELECTED DRAWING: Figure 1

Description

The present invention belongs to the technical field of rotation follow-up type automatic doors, and more specifically, works carried out in equipment inside and outside atmosphere shielding equipment of continuous production equipment such as local exhaust equipment, heating equipment, cooling equipment, air conditioning rooms, clean rooms, etc. It relates to an automatic door that rotates and opens and closes while following the direction of movement of the door.

Conventionally, (A) sliding door type and (B) hinged door type automatic doors have been used for the purpose of shielding between devices with different processing contents, but the adoption of automatic doors was limited to the pitch feed transfer method. .
(A) As shown in FIG. 7, the sliding door type automatic door is a single row in the continuous transfer method, and when the automatic door a is a sliding door type that opens to the left and right, the time period during which the door a is closed is It becomes very short, and the workpiece w positioned between the front and rear doors a is in a substantially open state. As an example, it is carried out under the following conditions.
(Condition example)
Work (w) Width 300mm x Length 550mm
Conveyor pitch 812mm
Conveyor speed: 2 m/min = 33.3 mm/sec
Automatic door (a) Speed: 10m/min = 167mm/sec

(B) In addition, as shown in FIG. 8, the automatic door of the hinged door type is a single row in the continuous transfer method, and when the hinged door type that opens in front of the automatic door c in a double-sided state is used, the opened door c Interference k may occur between the front end and the rear end of the work w. As an example, it is carried out under the following conditions.
(Condition example)
Work (w) Width 300mm x Length 550mm
Conveyor pitch 812mm
Conveyor speed: 2 m/min = 33.3 mm/sec
Automatic door (c) Speed: 1/4πrad/s

As a related coating system, Patent Document 1 below describes a main transfer line that allows a workpiece to move along a track, and a coating chamber that is arranged adjacent to the main transfer line and is independent of the main transfer line. a coating casing, a coating device in the coating chamber, a work holding device for holding a work at a coating position near the coating device during coating, and a work on the main transfer line that can be moved to the work holding device, a work moving device capable of moving the work held by the work holding device onto the main transfer line, and the coating casing is provided with an opening serving as a movement passage for the work between the coating chamber and the main transfer line. A coating system characterized by the following is disclosed (see claim 1 of the same document).

Japanese Patent Application Laid-Open No. 2002-59046

In the case of the sliding door type automatic door of (A), in order to keep one set of doors a closed at all times, if the doors a are arranged in a double row, a very large number of doors a and a very large space are required. Since it is necessary, there is a problem that adoption is practically difficult.
In addition, in the case of the hinged door type (B), since the workpiece w exists in the opening direction of the door c, if the opening speed is increased, it interferes with the workpiece w (see symbol k). Therefore, the time available for the closing operation is shortened, and as a result the time during which the door c is closed is extremely shortened. Moreover, as in the case of the sliding door type, if the doors c are double-rowed in order to keep one set of doors c closed at all times, a very large number of doors c and a very large space are required. is not realistic.

In other words, in both the sliding door method and the hinged door method, when adopting the continuous transfer method, it is necessary to leave a large distance between the workpieces, and one of the automatic doors arranged in series must be closed. Since a very large space is required for the operation, it has been difficult to adopt an automatic door for a continuous transport system from both aspects of production efficiency and installation space.
Furthermore, in the coating system of Patent Document 1, it is necessary to provide a coating casing that constitutes an adjacent and independent coating chamber separately from the main transfer line that allows the workpiece to move along the track. A device, a workpiece holding device, and a workpiece moving device must be provided, and this becomes a large-scale and precise device that requires space and increases costs. Moreover, there is the problem that it takes time and effort to repeatedly move the work between the main transfer line and the coating casing.

Accordingly, the present invention has been devised in view of the above problems, and its object is to realize a compact device for shielding the atmosphere inside and outside of continuous production equipment in a minimum necessary space, and to improve work efficiency such as painting processing. To provide a revolving automatic door which is improved and reduced in cost.

As a means for solving the above-mentioned problems, the invention described in claim 1 has rotatable automatic doors 2 arranged on a plurality of arms 1 radially provided, and the automatic rotary doors 2 are arranged as described above. The rotating automatic door 2 is rotatable following the rotation of the arm 1 while always maintaining a constant orientation, and shields the front and/or rear of the workpiece 3 entering while the arm 1 is being rotated. This is a rotation follow-up type automatic door, characterized in that a shielding space S for the work 3 is formed at .

In the invention described in claim 2, rotatable rotating automatic doors 2 are arranged on four arms 1 radially provided every 90°, and the rotating automatic doors 2 at adjacent positions are arranged on the arm 1 The rotating automatic door 2 is rotatable while always maintaining a parallel state following the rotation of the arm 1, and shields the work 3 entering while the arm 1 is rotating from the front and/or the rear. This is a rotation follow-up automatic door characterized in that 3 shielding spaces S are formed on the left and right.

In the invention described in claim 3, the conveying conveyor 4 for entering the work 3 into the left and right shielded spaces S formed while the rotary automatic door 2 rotates is linear with respect to the shielded spaces S and oriented in the opposite direction. 2. Provided on two different routes R1 and R2, and characterized in that the workpieces 3 are continuously entered into the shielded space S of each route R1 and R2 by the conveyors 4 of the two routes R1 and R2. It is a rotation follow-up type automatic door described in.

The invention described in claim 4 is characterized in that the arm 1 and the rotary automatic door 2 are rotated in accordance with the approach speed of the workpiece 3, and the rotation follow-up device according to any one of claims 1 to 3. It is a type automatic door.

According to the invention described in claim 5, the arm 1 is configured to be rotatable in synchronization with the operation of the transfer conveyor 4 for advancing the workpiece 3, according to any one of claims 1 to 4. It is the described rotation follow-up type automatic door.

In the invention described in claim 6, a drive-side sprocket 5 fixed at the proximal ends of the plurality of arms 1 and a rotatable passive-side sprocket 6 connected to a rotating automatic door 2 are connected by a chain 7, and the arms The rotation follow-up automatic door according to any one of claims 1 to 5, characterized in that when the automatic door 1 is rotated, the automatic rotary door 2 is rotated together.

In the invention described in claim 7, a central partition wall 8 is provided on the outer periphery of the drive side sprocket 5 at the base end of the plurality of arms 1, and outer partition walls are provided on the right and left sides of the central partition wall 8. 9 is provided, and a plurality of shielding spaces S are formed by the automatic revolving door 2, the central partition wall 8, and the outer partition wall 9. It is a rotation follow-up type automatic door described in.

The invention recited in claim 8 is characterized in that the work 3 located in the shielded space S shielded by the automatic revolving door 2 is subjected to a coating process, according to any one of claims 1 to 7. It is a rotation follow-up type automatic door described in.

According to the rotation follow-up automatic door of the present invention, it is possible to efficiently realize a device for shielding the atmosphere inside and outside of a continuous production facility with a compact design in a minimum necessary space. In addition, there are the following effects (1) to (4).
(1) Conventionally, air curtains have often been used in heating furnaces that use a continuous transfer method when installation height restrictions are severe. It is possible to reduce the heat load by shutting off the heat effectively, contributing to the reduction of _CO2 by saving energy.
(2) Conventionally, in the cooling device of the continuous transfer system, the passage opening for the workpiece has often been of the open type. The automatic door makes it possible to physically reduce the outflow of cold air, realizing energy saving.
(3) Conventionally, in the continuous transfer type local exhaust system, the passage opening for the work is often open, and it is necessary to create an air flow on the opening surface to prevent leakage of harmful substances. Therefore, it was necessary to increase the capacity of the electric motor used for the exhaust blower and expand the diameter of the exhaust duct, but by physically shielding using the rotation tracking type automatic door of the present invention, Contributes to reduction of motor capacity.
(4) By improving the shielding efficiency as described in (1) to (3) above, it is possible to reduce the leakage of hot air and harmful substances into the general work area, contributing to the improvement of the work environment around various devices. do.

A to F are explanatory diagrams chronologically showing the state of implementation of the rotation follow-up type automatic door of the present invention. A is an explanatory view showing the basic structure of the rotation tracking type automatic door from the plane direction, and B is an explanatory view showing a state where the arm is rotated 15 degrees from the state of A. FIG. A is a plan view showing a general-purpose chain type rotation follow-up automatic door, B is a cross-sectional view of A along the line BB, and C is a cross-sectional view of A along the AA line. Fig. 2 is a right side view showing a general-purpose chain type rotation follow-up automatic door; A is a cross-sectional view showing a pin gear type rotation following type automatic door taken along line AA of B, and B is a front view of the pin gear type rotation following type automatic door. FIG. 5B is a cross-sectional view showing the pin gear type rotation follow-up automatic door taken along the line BB of FIG. 5A; 4A to 4D are explanatory diagrams chronologically showing the state of implementation of a conventional sliding door type automatic door. 1A to 1C are explanatory diagrams chronologically showing the state of implementation of a conventional hinged automatic door.

A preferred embodiment of the rotation following type automatic door of the present invention will be described with reference to the drawings.
This rotation follow-up automatic door is usually implemented as a drive type with a general-purpose chain shown in FIGS. However, in the case of a large size where it is difficult to use a general-purpose chain, a pin gear drive type shown in FIGS. 5 and 6 is used (see below).
As shown in FIG. 2, this rotation follow-up type automatic door has a rotatable rotary automatic door 2 on each of four arms 1 arranged radially at every 90°. The rotating automatic door 2 at the adjacent position is rotatable while always maintaining a parallel state in a fixed direction following the rotation of the arm 1, and stands in front and behind the work 3 entering while the arm 1 is rotating. Shielding spaces S for workpieces 3 are formed simultaneously at left and right positions inside by rotating automatic doors 2 that shield so as to be closed (FIGS. 1D and 5A). Details are given below.

In the drive type using a general-purpose chain of this embodiment, a drive geared motor 18 is installed at one end of a plate-like base frame B provided with a lower adjuster bolt 17 shown in FIG. A main shaft 10 is erected on the other end side of the base frame B, a passive side sprocket 11 for arm rotation is attached to the lower side of the main shaft 10, and a drive side sprocket 5 for following the door rotation, which will be described later, is mounted above the main shaft 10. installed. Reference numeral 19 indicates a set color.
A chain 12 for rotating the arm is stretched between the passive side sprocket 11 and a sprocket 13 on the arm rotation drive side that is connected to the output shaft of the drive geared motor 18 and driven. The torque applied to 13 is transmitted to the arm rotation passive side sprocket 11 via the chain 12 .

Four arms 1 are radially connected to the arm rotation passive side sprocket 11 at equal intervals of 90°. sprocket 6 is attached.
Four sprockets 5 on the driving side for following the door rotation are attached to the rotation centers at the base ends of the four arms 1 (see FIG. 3C). Each door rotation follow-up driving side sprocket 5 is connected to a door rotation follow-up passive side sprocket 6 by a door rotation follow-up chain 7 . Reference numeral 14 denotes an idler sprocket that rotates under the power of the chain 7, and reference numeral 15 denotes the idler shaft.
A rotary automatic door 2 is rotatably connected to the upper portion of the passive side sprocket 6 for following the door rotation.
5 and 6, in the pin gear drive type rotation follow-up automatic door, the chain 12 for rotating the arm is replaced with a pin gear type chain 12', which is driven by a drive geared motor, unlike the general-purpose chain described above. The difference is that a sprocket 13 driven by 18 allows the arm 1 to rotate. Except for the fact that the passive side sprocket 11 for arm rotation, the idler sprocket 14, the idler shaft 15, and the set collar 19 are not required, the configuration of the rotation follow-up automatic door is substantially the same.

Next, the functions of the arm 1 and the rotating automatic door 2 and the interlocking operation of their rotation will be described.
FIG. 2B shows a state in which the arm 1 is rotated 15 degrees counterclockwise from the basic state shown in FIG. 2A. In the state shown in FIG. 2B, the drive-side sprocket 5 for following door rotation is fixed and does not rotate. Therefore, the door rotation follow-up chain 7 is wound around the door rotation follow-up driving sprocket 5 by a length of the number of teeth×chain pitch×rotation angle/360°. Since the center-to-center distance between the door rotation follow-up driving side sprocket 5 and the door rotation follow-up passive side sprocket 6 is set constant, the chain 7 of the same length as the wound length is on the door rotation follow-up passive side. It is unwound from the sprocket 6. Since the drive side sprocket 5 for door rotation follow-up and the passive side sprocket 6 for door rotation follow-up are configured with the same number of teeth, the rotation angles are also the same when the winding length and the unwinding length are the same. Therefore, the rotating automatic door 2 attached to the door rotation following passive side sprocket 6 rotates in conjunction with the rotation angle of the arm 1, and the rotating automatic door 2 is always held in the same direction (Fig. 3A). and the movement of the revolving automatic door 2 shown in virtual illustration in FIG. 5A).
In addition, the arm 1 is configured to rotate by synchronous control using a synchro control method in which the advancing distance of the conveyer 4 for entering the work 3 to be described later is controlled by angular displacement into the shielding space S, and the work 3 The arm 1 and the rotating automatic door 2 are rotated in accordance with the approach speed of .

A central partition wall 8 is provided on the outer periphery of the driving side sprocket 5 at the base end of the four arms 1, and the outer partition wall 8 is provided on the right and left sides of the central partition wall 8. An outer partition wall 9 serving as a partition is provided respectively. Therefore, two shielding spaces S can be freely formed at the same time by the rotary automatic door 2, the central partition wall 8, and the outer partition wall 9 (see FIGS. 1D and 5A).
Therefore, as shown in FIG. 1, a transfer conveyor 4 (abbreviated for short) that allows workpieces 3 to enter left and right shielded spaces S (FIG. 1D) formed by rotating the automatic rotary door 2 configured as described above counterclockwise. The same illustration as the routes R1 and R2) is provided as two routes R1 and R2 that are straight and opposite in direction to the shielding space S on the left and right sides. Thus, the workpieces 3 of width 300 mm×length 550 mm continuously entering each shield space S through the two routes R1 and R2 in different directions are conveyed at a conveying pitch of about 812 mm and a conveying conveyor 4 speed of 2 m/m. Min=33.3 mm/sec, Speed of revolving automatic door 2: (812/2000)/4 rpm=1.624 rpm, coating treatment is performed smoothly.

Although the embodiments have been described with reference to the drawings, the present invention is not limited to the illustrated examples. Just to make sure, we include the scope of design changes and variations in application that we make.

S Shield space R1, R2 Route B Base frame 1 Arm 10 Main shaft 11 Passive side sprocket for arm rotation 12 Chain for arm rotation 13 Drive side sprocket 14 Idler sprocket 15 Idler shaft 16 Arm rotation shaft bearing 17 Adjustment bolt 18 Drive geared motor 19 Set collar 2 Rotating automatic door 20 Door rotating shaft 21 Bearing for holding the door rotating shaft 3 Workpiece 4 Conveyor 5 Driving side sprocket 6 for following door rotation Passive side sprocket 7 for following door rotation For following door rotation chain 8 central partition wall 9 outer partition wall

Claims (8)

A rotatable rotating automatic door is arranged on each of a plurality of arms radially provided, and the rotating automatic door is rotatable following the rotation of the arm while always maintaining a constant orientation, and the arm is A rotation follow-up automatic door, characterized in that a shielding space for the workpiece is formed inside by the rotating automatic door that shields the front and/or rear of the workpiece entering while being rotated. A rotatable rotating automatic door is arranged on each of four arms radially provided every 90 degrees, and the rotating automatic doors at adjacent positions follow the rotation of the arms and always maintain a parallel state. The rotary automatic door is rotatable and shields the front and/or rear of the workpiece that enters while the arm is rotated, forming left and right shielding spaces for the workpiece inside. Follow-up automatic door. Conveyor conveyors for allowing workpieces to enter left and right shielded spaces formed while the rotary automatic door rotates are provided on two routes that are linear with respect to the shielded space and have opposite directions. 3. A rotation follow-up automatic door according to claim 1 or 2, characterized in that the workpieces are continuously entered into the shielded space of each route. The rotation follow-up automatic door according to any one of claims 1 to 3, characterized in that the arm and the automatic rotary door are rotated according to the entry speed of the workpiece. 5. The automatic door according to any one of claims 1 to 4, wherein the arm is rotatable in synchronism with the operation of the conveyer for entering the workpiece. A drive-side sprocket fixed at the base end of the plurality of arms and a rotatable passive-side sprocket connected to the rotating automatic door are connected by a chain, and when the arm rotates, the rotating automatic door rotates in conjunction with the driving side sprocket. The rotation follow-up automatic door according to any one of claims 1 to 5, characterized in that A central partition wall is provided on the outer periphery of the drive-side sprockets at the base ends of the plurality of arms, and outer partition walls are provided on the right and left sides of the central partition wall, and the rotating automatic door and the central partition wall are provided. The rotation tracking type automatic door according to any one of claims 1 to 6, characterized in that a plurality of shielding spaces are formed by the partition wall and the outer partition wall. The rotation follow-up automatic door according to any one of claims 1 to 7, characterized in that a work located in a shielded space shielded by said automatic rotating door is subjected to a coating treatment.