JPH0719563Y2 - Powder quantitative supply device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a powder quantitative supply device suitable for a powder spray device of a printing machine, for example.

[0002]

2. Description of the Related Art A conventional powder spraying device used in a printing machine does not have a fixed amount supply function for determining the absolute amount of powder to be sprayed, and as disclosed in, for example, Japanese Patent Laid-Open No. 2-76738. Since the amount of spray was adjusted by adjusting the flow rate of the injection air and the amount delivered from the container by the screw, the amount is not accurate, and it is necessary to spray the amount of powder suitable for each printing mode. Was difficult.

Therefore, an object of the present invention is to efficiently supply powder in a quantitative manner only with a simple mechanical structure, and to adjust the quantity easily and accurately. The object of the present invention is to provide a quantitative powder supply device which does not leak into the interior.

[0004]

The powder quantitative supply device according to the present invention comprises a vertically elongated elastic tube 10 which can be crushed and restored.
Is hung from the lower end discharge port 7 of the powder container 1, the fixing table 15 is installed on one side with the elastic tube 10 sandwiched therebetween, and the disk 1 rotated by the motor 22 on the other side.
6 is rotatably supported. An arc concave surface 15a is formed on the side surface of the fixed base 15. On the other hand, in the disk 16, the middle of the elastic tube 10 is provided with the arc concave surface 1 of the fixing base 15.
A plurality of pressing rollers 20 that are pressed against 5a and crushed,
In order that the crushing is performed while squeezing out the powder in the elastic tube 10 one by one as the disc 16 rotates, the shafts are rotatably rotatable at predetermined intervals in the circumferential direction of the disc 16. It is supported.

[0005]

[Function] The powder in the powder container 1 is a vertically long elastic tube 10.
Although it naturally falls into the inside, it does not flow out from the elastic tube 10 because the middle of the elastic tube 10 is normally crushed and closed by one pressing roller 20. When the disk 16 is rotated by the motor 22 from this state, the pressing roller 20 that has crushed the elastic tube 10 until now is separated from the elastic tube 10, but the next pressing roller 20 newly crushes the elastic tube 10. To go
Only the volume of powder between the crushed portions by the two pressing rollers 20 is squeezed out from the elastic tube 10. The squeezing amount can be easily adjusted by controlling the rotation speed of the motor 22.

Each pressing roller 20 is rotatable with respect to the disk 16, and the side surface of the fixed base 15 has an arcuate concave surface 15.
a is formed, and the elastic tube 10 is formed on the circular arc concave surface 15a.
Since crushing is performed by pressing in the middle, the frictional force applied to the elastic tube 10 is small even if crushing and its release are repeated, and the crushing and its release and the squeezing of the powder can be performed smoothly. Further, since the arcuate concave surface 15a is provided, the elastic tube 10 can be crushed not in a linear shape but in a certain area, so that the middle of the elastic tube 10 can be reliably closed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, one embodiment of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, in this powder quantitative supply device, a powder container 1 is attached to an upper end portion of a front surface of a vertical support base plate 2. The lid 3 of this powder container 1
A hopper 4 for loading powder and a stirring motor 6 for stirring the powder in the powder container 1 with an agitator 5 are mounted on the top.

The powder container 1 is conically recessed toward the lower end discharge port 7. A cock 8 is attached to the lower end discharge port 7 so as to penetrate therethrough. Further, a vertically long elastic tube 10 made of rubber or the like is vertically provided from the lower end discharge port 7 through a nipple 9.

The lower end of the elastic tube 10 has a support base plate 2
Of the injection block 11 fixed to the lower end portion of the front surface of the powder injection port 11. The jet block 11 is further provided with an air jet port 13 and a jet port 14, and the powder squeezed out from the elastic tube 11 as described later is outside the jet port 14 by the air from the air jet port 13. Immediately jetted out, or jetted from a separately prepared nozzle via a hose connected to the jet outlet 14.

A fixed base 15 is mounted on one side of the left and right sides of the elastic tube 10 and a disk 16 is mounted on the other side of the support base plate 2 so as to face each other. Since the fixed base 15 is attached to the front surface of the support base plate 2 with the bolt 18 through the laterally long hole 17, the fixed position with respect to the support base plate 2 can be adjusted left and right. An arcuate concave surface 15a is formed on one side surface of the fixed base 15, that is, the side surface on the disk 16 side.

The disk 16 is rotatably supported on the front surface of the support base plate 2 by a horizontal shaft 19. A plurality of pressing rollers 20 are provided on the vertical front surface of the disc 16 along a horizontal axis 21 at predetermined intervals in the circumferential direction of the disc 16.
It is rotatably supported individually. In the example shown in the figure, there are four pressing rollers 20, and the disc 16 has a phase difference of 90 degrees.
Placed on the front of the tube, one of which is the elastic tube 1
The middle part 10a of 0 is pressed against the circular arc concave surface 15a of the fixed base 15 to be crushed.

On the other hand, a powder squeezing motor 22 is attached to the rear surface of the support base plate 2. Then, the gear 23 on the side of the motor 22 and the horizontal shaft 19 of the disc 16
The gear 24 fixed to the
When 2 is driven, the disc 16 is rotated counterclockwise in FIG.

Therefore, the powder in the powder container 1 is agitated by the agitator 5 and naturally falls into the elastic tube 10. However, normally, the middle portion 10a of the elastic tube 10 is crushed by one pressing roller 20. Since it is closed by being blocked, it does not flow out from the elastic tube 10. When the disk 16 is rotated by the motor 22 from this state, the four pressing rollers 20 revolve, so that the elastic tube 10 has been rotated until then.
Although the pressing roller 20 that has been crushed is separated from the elastic tube 10, the next pressing roller 20 newly crushes the midway 10a of the elastic tube 10 while rotating on its own axis. Only the amount of the powder of the amount is squeezed out smoothly from the elastic tube 10.

Therefore, the powder is squeezed out of the elastic tube 10 by a constant amount every time the disk 16 rotates 90 degrees, and is jetted by the air from the jetting block 11 as described above. The injection amount per unit time is determined by the motor 22
It can be easily adjusted by controlling the number of rotations. In addition, it is easy to set timing with an external machine or system.

[0015]

According to the present invention, the following effects can be obtained. Rotate the disk and revolve a plurality of pressure rollers rotatably supported on it to crush the elastic tube sequentially and squeeze out the powder in a fixed amount. It can be supplied efficiently. Since the powder is quantitatively processed in the elastic tube, it does not leak to the outside, does not impair the work environment, and
There is no damage to the sliding parts of the machine. . Since the supply amount can be controlled by the rotation speed of the motor that rotates the disk, the supply amount can be easily and accurately adjusted from a small amount to a large amount. Since the supply amount can be adjusted only by controlling the number of rotations of the motor, the timing with various machines and systems can be easily adjusted, and the system can be easily integrated with a printing machine or the like. Each pressing roller is rotatable with respect to the disc, and an arc concave surface is formed on the side surface of the fixed base. The middle of the elastic tube is pressed against the arc concave surface to crush it, so even if crushing and releasing are repeated, it is elastic. The frictional force applied to the tube is small, and it is possible to smoothly crush and release it, and squeeze out powder. Since the fixed base has a circular arc concave surface, the elastic tube can be crushed with a certain area instead of a linear shape,
The middle of the elastic tube can be reliably blocked. Since the powder container, the elastic tube suspended from the powder container, the fixing base, the disk supporting a plurality of pressing rollers, and the motor for rotating the disk have a simple mechanical structure, the cost is low. It can be provided and miniaturized.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Powder container 7 Lower end discharge port 10 Elastic tube 15 Fixing stand 15a Arc concave surface 16 Disc 20 Pressing roller 22 Motor

Claims (1)

[Scope of utility model registration request] 1. A vertically elongated elastic tube 10 that can be crushed and restored.
Is hung from the lower end discharge port 7 of the powder container 1, the fixing table 15 is installed on one side with the elastic tube 10 sandwiched therebetween, and the disk 1 rotated by the motor 22 on the other side.
6 is rotatably supported, and a circular arc concave surface 15a is formed on the side surface of the fixed base 15. Further, the middle of the elastic tube 10 is formed in the disk 16 on the circular concave surface 15 of the fixed base 15.
The circular shape of the disk 16 is such that a plurality of pressing rollers 20 that are pressed against a and are crushed are sequentially rotated one by one as the disk 16 rotates, squeezing out the powder in the elastic tube 10. A powder quantitative supply device, which is rotatably supported at predetermined intervals in the circumferential direction.