JPH0212614B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a turntable-type powder/granule automatic supply system suitable for supplying powder/granules consisting of powder or granules in batches, for example. It is related to the device.

[Prior Art] A conventional turntable-type powder/granule automatic feeding device has a turntable supporting a plurality of hoppers along its circumferential direction, a shutter is provided at the bottom of each hopper, and a shutter is provided at the bottom of each hopper. Each of the hoppers was equipped with an automatic shutter opening mechanism, a specific hopper was stopped at the supply position, and the shutter of that hopper was automatically opened by the automatic shutter opening mechanism to drop the powder and granules inside.

[Problems to be Solved by the Invention] However, in such a structure, it is necessary to provide an automatic shutter opening mechanism for each shutter, so automatic shutter opening mechanisms are required for each hopper supported on the turntable.
The disadvantages are that the structure is complicated, equipment costs are high, and maintenance is troublesome.

SUMMARY OF THE INVENTION An object of the present invention is to provide a turntable-type powder/granule automatic feeding device that can simplify the structure, reduce equipment costs, and facilitate maintenance.

[Means for solving the problems] The structure of the present invention for achieving the above object is as follows:
The present invention will be explained with reference to FIGS. 1 to 5, which correspond to embodiments. In the present invention, a turntable 1 has a plurality of hoppers 9 supported along its circumferential direction, and each hopper 9 is provided with a shutter 11. The shutter 11 of a specific hopper 9 is provided to be openable and closable, and the shutter automatic opening mechanism 2
In the turntable-type powder/granule automatic supply device which is designed to be opened at 1, each shutter 11 of each hopper 9 is connected to a pivot shaft
Each of the gravity-closing shutters 11 is composed of a gravity-closing type shutter that rotates about 2 and closes under its own weight, and each of the gravity-closing type shutters 11 is connected to the pivot shaft 12 in order to open the shutter.
The shutter automatic opening mechanism 21 includes a cam 14 that rotates around the turntable 1.
The shutter automatic opening mechanism 21 is installed as a common operating means at a specific position of the fixed system adjacent to the cam operating element 2 that contacts and separates from the cam surface 14.
3, and a drive source 25 that applies force to the self-locking shutter 11 via the cam operator 23 to rotate the shutter 11 in the shutter opening direction about the pivot shaft 12 against its own weight. It is characterized by being composed of.

[Operation of the invention] In such a device, the turntable 1
The gravity-closing shutter 11 of each hopper 9 is normally kept closed by its own weight. When a certain hopper 9 is stopped at the position of the shutter automatic opening mechanism 21 and the mechanism 21 is operated, the self-weight closing type shutter 11 is rotated in the opening direction against its own weight, and the powder/grains in the hopper 9 are released. The body is dropped.
According to this structure, the number of shutter automatic opening mechanisms 21 is smaller than the number of hoppers 9, and the structure is simplified.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 5. The turntable-type powder/granule automatic supply device of this embodiment includes a turntable 1, and a cylindrical rotating shaft 1A at the center of the turntable 1 is rotatably supported by a bearing 2. The lower surface of the outer periphery of the turntable 1 is supported by a plurality of rollers 3. The turntable 1 has a drive source mechanism 4
It is designed to be rotationally driven. This drive mechanism 4 transfers the rotational force of the drive motor 5 to a rotational force transmission system 6.
The rotation is transmitted to the drive gear 7, and the gear 7 is engaged with the teeth 8 on the outer periphery of the turntable 1, thereby driving the turntable 1 to rotate.

A plurality of hoppers 9 are supported by penetrating the turntable 1 along its circumferential direction. The upper opening of each hopper 9 is closed by a lid 10 so as to be openable and closable. The lower part of each hopper 9 is normally closed by a shutter 11 of its own gravity closing type.
The shutter 11 is rotatably supported around a pivot shaft 12, and is normally urged to rotate downward by its own weight, with the lower arcuate shutter main body 11A being attached to the hopper 9. The lower portion of the hopper 9 is closed by being engaged with the lower arcuate lower surface 9A. The pivot shaft 12 is supported on the hopper 9 by a bracket 13. A cam surface 14 that rotates around a pivot shaft 12 is provided on the upper end surface of the hopper 9 . These cam surfaces 14 are formed to protrude horizontally outward in the direction of rotation of the hopper 9 when the shutter 11 is in the closed state.

A receiving hopper 15 is fixedly installed at a specific position on the turntable 1 below the rotation path of the hopper 9. In order to stop the hopper 9 at a specific position where the receiving hopper 15 exists, a positioning sensor 16 consisting of a limit switch is provided supported by a fixed frame 17 at this specific position. An operator 18 for operating the sensor 16 is provided on the side surface of each hopper 9, respectively. When the sensor 16 detects the hopper 9, it sends a signal to the drive mechanism 4 to stop the rotation of the turntable 1.

Further, at this specific position, a powder/granule presence/absence detection means 19 consisting of a light emitter 19A and a light receiver 19B for detecting whether or not powder/granule exists in the stopped hopper 9 is provided. . The light projector 19A is supported by a support member 19C that passes through the rotation axis 1A at the center of the turntable 1, and the light receiver 19B is provided on the fixed frame 17 so as to be able to receive light with the hopper 9 in between. Each hopper 9 has a pair of windows 2 so that the light from the floodlight 19A can pass through.
0A and 20B are provided, respectively. When powder/granules are present in the stopped hopper 9,
The light emitted from the emitter 19A is blocked and sent to the receiver 1.
Since it does not reach 9B, the presence or absence of powder/granules can be detected. The presence or absence of such powder/granules can be confirmed by the positioning sensor 16 using the hopper 9.
This is done after detecting the rotational movement of the hopper 9.

Furthermore, an automatic shutter release mechanism 21 is installed at this specific position to open the self-locking type shutter 11 of the stopped hopper 9. This shutter automatic opening mechanism 21 is a fixed frame 1.
A cam operating element 23 is supported by a bracket 22 protruding from 7 so as to be rotatable up and down, and a roller 24 is supported at the tip of the cam operating element 23. The tip of a drive rod 25A of a drive source 25 consisting of an air cylinder is pivotally connected to the middle of the cam operator 23, and the drive source 25 is pivotally supported on a base plate 26.

In such a turntable-type powder/granule automatic supply device, each hopper 9 stores powder/granules in batches. The turntable 1 is rotationally driven by a drive mechanism 4. At this time, cam operator 2
3 is located above the cam surface 14 and is held so as not to hit the shutter 11 due to its own weight. When the positioning sensor 16 detects that a particular hopper 9 has rotated to the position of the receiving hopper 15, a stop signal is output from the sensor 16 to the drive mechanism 4, and the turntable 1 is stopped. When the turntable 1 is stopped, light is emitted from the projector 19A to the window 20A of the hopper 9. If there is no powder or granules in the hopper 9, the light passing through the hopper 9 will be received by the light receiver 19B, so at this time, a restart signal will be sent from the light receiver 19B to the drive mechanism 4 to turn Table 1 is passed around and the next hopper 9 is waited for. If powder or granules are present in the hopper 9, no light will be received by the light receiver 19B, so it is determined that powder or granules are present, and the shutter automatic opening mechanism 2 will be opened from the light receiver 19B.
1, a shutter release signal is issued, a drive source 25 consisting of an air cylinder is driven, and its drive rod 25A is driven backward. As a result, the cam operator 23 is pulled down, and the roller 24 moves the cam surface 14
is pushed downward. Due to this pushing down force, the gravity-closing shutter 11 is rotated about the pivot shaft 12 in the opening direction. The shutter 11
When the hopper 9 is opened, the powder/granules in the hopper 9 are dropped into the receiving hopper 15. When the dropping is completed, the drive rod 25A is pushed out and the roller 24 is separated from the cam surface 14, so that the self-weight closing type shutter 1
1 is rotated in the closing direction by its own weight and closed.

Note that the drive source 25 may be located above the cam operator 23.

Such a turntable-type powder/granule automatic supply device can be used, for example, as a means for supplying a crosslinking agent or an anti-aging agent to be mixed into an insulating material in an electric cable manufacturing process in batches to a dissolving tank.

[Effects of the Invention] As explained above, in the turntable-type powder/granule automatic feeding device according to the present invention, the shutter of each hopper supported by the turntable is a dead-weight closing type shutter that is closed by its own weight. , which has the advantage of not requiring any special drive means for automatic shutter closing. In addition, the automatic shutter opening mechanism is installed at a specific position on the fixed side so that each shutter can be operated in common by this automatic shutter opening mechanism, so there is no need to provide automatic shutter opening mechanisms for the number of shutters, and the structure This has the advantage of simplifying the process, reducing equipment costs, and making maintenance easier. Furthermore, the automatic shutter opening operation is performed by bringing the cam operator of the automatic shutter opening mechanism into contact with the cam surface provided on the shutter when necessary, making it easier to connect and separate the stationary side and the rotating side. This has the advantage of not interfering with the rotation of the turntable.

[Brief explanation of drawings]

1 and 2 are a cross-sectional view and a plan view of an embodiment of the device according to the present invention, and FIGS. 3 and 4 show the relationship between the self-locking shutter and the automatic shutter opening mechanism in this embodiment. FIG. 5 is a front view of the state shown in FIG. 3 with the shutter opened. DESCRIPTION OF SYMBOLS 1... Turntable, 2... Bearing, 4... Drive mechanism, 9... Hopper, 11... Dead weight closing type shutter, 12... Pivot shaft, 14... Cam surface, 1
6... Positioning sensor, 17... Fixed frame, 18... Operator, 19... Powder/granule presence/absence detection means, 19A... Emitter, 19B... Light receiver, 2
0A, 20B...Window, 21...Shutter automatic opening mechanism, 23...Cam operator, 24...Roller,
25... Drive source.

Claims (1)

[Claims] 1 A plurality of hoppers are supported on the turntable along its circumferential direction, each of the hoppers is provided with a shutter that can be opened and closed, and the shutter of a specific hopper is opened at a specific position by a shutter automatic release mechanism. In the turntable type automatic powder/granule feeding device, each of the shutters of each hopper is a self-locking shutter that rotates around a pivot shaft and closes under its own weight, The shutter is equipped with a cam surface that rotates around the pivot shaft for opening the shutter, and the automatic shutter opening mechanism is installed as a common operating means at a specific position of the fixed system adjacent to the turntable. ,
The automatic shutter opening mechanism includes a cam operating element that contacts the cam surface, and applies force to the self-locking shutter through the cam to move the shutter about the pivot shaft against its own weight. A turntable-type powder/granule automatic supply device characterized by comprising a drive source that rotates in the opening direction.