JP5096973B2 - Powder cutting device - Google Patents

Description

  The present invention relates to a powder cutting device used, for example, for measuring and dispensing a chemical compounded in rubber.

  The powder cutting device is disposed in a powder transport passage. The powder cutting device includes a valve seat and a valve body. The powder cutting device can be switched between a closed state where the valve body sits on the valve seat and prohibits passage of powder, and an open state where the valve body is separated from the valve seat and allows passage of powder. It is.

  In the powder cutting device, securing a sealing property between the valve seat and the valve body in the closed state becomes a problem. That is, the powder may adhere to the valve seat or the valve body. In this case, the powder is caught between the valve seat and the valve body in the closed state. For this reason, the sealing performance in the closed state is lowered.

  In view of this, Patent Document 1 discloses a powder cutting device in which a seal portion composed of a valve seat and a valve body is doubled inward and outward in the radial direction. According to the powder cutting device disclosed in Patent Document 1, even when powder is caught between the valve seat on the radially inner side and the valve body in the closed state, the valve body is seated on the valve seat on the radially outer side. Thus, sealing performance can be ensured.

Patent Documents 2 and 3 disclose a powder cutting device in which an elastic deformation plate made of spring steel is arranged on a valve seat. According to the powder cutting devices of Patent Literature 2 and Patent Literature 3, when the valve opening state is switched to the valve closing state, the elastic deformation plate is pressed against the valve body and elastically deforms. By the elastic deformation, the powder adhering to the valve seat can be peeled off. For this reason, the sealing performance in a valve closing state is securable.
Japanese Utility Model Publication No. 62-133301 Japanese Utility Model Publication No. 63-166766 Japanese Patent Laid-Open No. 7-12240

  However, according to the powder cutting device disclosed in Patent Document 1, it is necessary to arrange the valve seat and the valve body in a double manner. For this reason, the structure of the powder cutting device was complicated. Moreover, according to the powder cutting device of patent document 2 and patent document 3, in both valve closing states, the valve body was in contact with the valve seat. For this reason, it has been difficult to completely prevent the powder from being caught between the valve seat and the valve body in the closed state.

  Further, there is a possibility that the valve seat or the valve body may be worn due to the sliding of the bitten powder and the valve seat or the valve body. For this reason, the durability of the valve seat or valve body against long-term use was low.

  Depending on the type of powder, moisture and oil may ooze out of the powder due to the biting of the powder between the valve seat and the valve body, or sliding between the powder and the valve seat or the valve body. There was a case. In this case, the powder agglomerated in a gum shape, and the powder easily adhered to the valve seat or the valve body. Therefore, the sealing performance has further deteriorated.

  The powder cutting device of the present invention has been completed in view of the above problems. Accordingly, an object of the present invention is to provide a powder cutting device having a simple structure, high versatility with respect to powder types, and high durability for long-term use.

  (1) In order to solve the above-mentioned problems, a powder cutting device according to the present invention comprises a cylinder having a discharge port for discharging powder, and a valve seat disposed at the edge of the discharge port, A valve-opened state disposed below the outlet and spaced apart from the valve seat to discharge the powder from the cylinder; and a valve closed to approach the valve seat and retain the powder in the cylinder A powder cutting device comprising a saucer-like valve body that can be switched to a state, wherein the cylindrical body and the valve body are not in contact with each other in the valve-closed state. .

  According to the powder cutting device of the present invention, the double seal portion as in Patent Document 1 is unnecessary. For this reason, the structure is simple. Further, according to the powder cutting device of the present invention, the valve body and the cylinder are not in contact with each other not only in the valve open state but also in the valve closed state. That is, a gap is secured between the valve seat and the valve body. In the valve closed state, the powder flows down from the discharge port to the valve body through the gap. And it accumulates on a valve body. For this reason, the said clearance gap is sealed with the powder itself which falls and accumulates.

  According to the powder cutting device of the present invention, since the gap is secured between the valve seat and the valve body in the valve-closed state, the powder is not easily caught. Further, since the powder is not easily caught, the powder and the valve seat or the valve body do not slide easily in the valve-closed state. Therefore, according to the powder cutting device of the present invention, the durability of the valve seat or valve body for long-term use is high.

  Further, according to the powder cutting device of the present invention, the valve seat and the valve body are not in contact with each other, so that the powder is not easily broken when switching from the valve open state to the valve closed state. Further, since the powder is difficult to break, even a powder whose properties change due to breakage can be handled. That is, according to the powder cutting device of the present invention, versatility with respect to the type of powder is high.

  (2) Preferably, in the configuration of the above (1), it further includes a gap adjustment unit that adjusts a gap between the valve seat and the valve body in the valve-closed state by moving the valve body. It is better to have a configuration. According to this configuration, for example, the gap between the valve seat and the valve body in the closed state can be optimized according to the type of powder.

  (3) Preferably, in the configuration of the above (1) or (2), a housing that houses the valve seat and the valve body therein, and a swing in which the valve body is fixed directly or indirectly And a valve body opening / closing portion having a shaft and a drive portion that is disposed outside the housing and is capable of switching between the valve open state and the valve closed state by swinging the swing shaft. Better to do.

  The valve body may be directly fixed to the swing shaft. Alternatively, the valve body may be fixed to the swing shaft via another member. That is, it is only necessary that the valve body and the swing shaft can swing together. According to this configuration, the drive unit is disposed outside the housing. For this reason, there is little possibility that the powder will enter the drive unit.

  (4) Preferably, in the configuration of the above (3), it is preferable to further include a sliding bearing portion that supports the swing shaft. According to this configuration, it is less likely to cause problems due to powder as compared to the case where a rolling bearing is used to support the swing shaft.

  (5) Preferably, in any one of the constitutions (1) to (4), the valve body opens upward in the valve-closed state and intersects at an acute angle with respect to the flow-down direction of the powder. It is preferable to have a bowl-shaped recess having an inclined surface extending in the direction, and the valve seat is accommodated in the recess in the valve-closed state.

  According to this configuration, the valve seat is accommodated in the recess of the valve body in the valve-closed state. For this reason, powder hardly spills from the valve body. Therefore, the sealing performance in the valve closed state is improved. The recess has an inclined surface (which may be flat or curved). The inclined surface extends in a direction that intersects at an acute angle with respect to the flow-down direction of the powder. For this reason, the powder which collided with the valve body in a valve-closed state rebounds toward the center of the recess. Therefore, the powder tends to be deposited in the center of the recess. That is, the powder is difficult to spill out of the recess. Also in this point, the sealing performance in the valve closed state is improved.

  (6) Preferably, in any one of the constitutions (1) to (5), the powder should have a liquid exudation property. According to the powder cutting device of the present invention, as described above, since the valve seat and the valve body are not in contact with each other, the powder is not easily broken when switching from the valve open state to the valve closed state. For this reason, even when handling powder in which liquid such as oil, moisture, or medicine exudes due to breakage of the powder, the powder is not easily broken when switching from the valve open state to the valve closed state. Therefore, it is possible to suppress the adhesion of the powder from being increased by the exuded liquid.

  According to the present invention, it is possible to provide a powder cutting device having a simple structure, high versatility with respect to powder types, and high durability for long-term use.

  Hereinafter, an embodiment in which the powder cutting device of the present invention is used for measuring and blending chemicals to be blended with rubber will be described.

[Disposition of powder cutting device]
First, the arrangement of the powder cutting device of this embodiment will be described. FIG. 1 shows a cross-sectional view in the front-rear direction of a weighing device in which the powder cutting device of the present embodiment is arranged. As shown in FIG. 1, the weighing device 9 includes a hopper 90, a flange 91, and four powder cutting devices 1. The hopper 90 is made of cloth and has a hollow conical shape that is pointed downward from above. The flange 91 is made of stainless steel and is fixed to the lower end of the hopper 90.

  Of the four powder cutting devices 1, three of the powder cutting devices 1 are arranged above the hopper 90. The remaining one powder cutting device 1 is connected below the flange 91. Each of the four powder cutting devices 1 can be switched between a valve opening state in which the medicine P flows down and a valve opening state in which the medicine P is retained. In addition, the chemical | medical agent P is contained in the powder of this invention.

  Of the three powder cutting devices 1 on the upper side, the two powder cutting devices 1 at the left end and the center are in the valve open state. On the other hand, among the upper three powder cutting devices 1, the rightmost powder cutting device 1 and the lower powder cutting device 1 are in a closed state.

  Measuring hoppers (not shown) are connected to the upper parts of the upper three powder cutting devices 1, respectively. From these three powder cutting devices 1, different types of chemicals P are respectively charged into the hopper 90 by a predetermined amount. The medicine P prepared by the hopper 90 is cut out from the lower powder cutting device 1 and packed in a bag.

  Here, among the chemicals P that are put into the hopper 90 from the three upper powder cutting devices 1, the chemical P that is fed from the powder cutting device 1 at the left end has oil exudation properties. That is, it has the property of being easily oiled by heating and sliding. For this reason, the chemical | medical agent P mix | blended with the hopper 90 also has oil oozing property.

[Configuration of powder cutting device]
Next, the configuration of the powder cutting device 1 of the present embodiment will be described. The configuration, movement, and effect of the four powder cutting devices 1 are the same. Therefore, hereinafter, only the lower one powder cutting device 1 will be described, and the upper three powder cutting devices 1 will also be described.

  In FIG. 2, the perspective view of the powder cutting device of this embodiment is shown. FIG. 3 shows a cross-sectional view in the front-rear direction of the powder cutting device. FIG. 4 shows an enlarged view in a circle IV in FIG. In FIG. 2, the lower end of the housing 5 and the chute 2 are shown in a transparent manner. Moreover, in FIG. 3, the member arrange | positioned on the right side rather than a cross section is shown with a dashed-dotted line.

  As shown in FIGS. 2 to 4, the powder cutting device 1 of the present embodiment includes a chute 2, a valve body 3, a pair of gap adjusting parts 4 </ b> L and 4 </ b> R, a housing 5, and a valve body opening / closing part 6. And a pair of sliding bearing portions. The chute 2 is included in the cylinder of the present invention.

  The chute 2 is made of stainless steel and has a cylindrical shape. The chute 2 includes a discharge port 20 and a valve seat 21. The upper end of the chute 2 is connected to the flange 91. The discharge port 20 is disposed at the lower end of the chute 2. The valve seat 21 is arranged at the mouth edge of the discharge port 20. The valve seat 21 has a substantially circular ring shape.

  The housing 5 includes a top plate 50, a housing main body 51, and a stopper 52. The housing body 51 is made of stainless steel and has a cylindrical shape with a square upper end and a circular lower end. The stopper 52 is made of stainless steel and has a short-axis cylindrical shape. The stopper 52 is fixed to the front wall of the housing body 51 by a nut 520. The tip of the stopper 52 protrudes into the housing body 51.

  The top plate 50 is made of stainless steel and has a flat plate shape. The top plate 50 closes the upper end opening of the housing body 51. A substantially circular chute insertion opening 500 is formed in the top plate 50. The lower end portion of the chute 2 is inserted into the chute insertion port 500. That is, the discharge port 20 and the valve seat 21 are accommodated in the housing 5.

  The pair of gap adjusting portions 4L and 4R are disposed on the outer surfaces of the left and right walls of the housing body 51. A pair of sliding bearing portions are housed inside the pair of gap adjusting portions 4L, 4R. The pair of gap adjusting portions 4L and 4R and the pair of sliding bearing portions will be described in detail later.

  The valve body opening / closing section 6 includes a swing shaft 60, a cylinder 61, a reciprocating rod 62, a connecting arm 63, and a pair of valve body support arms 64R and 64L. The cylinder 61 is included in the drive unit of the present invention.

  The swing shaft 60 is made of stainless steel and has a long-axis cylindrical shape. The swing shaft 60 passes through the housing body 51 in the left-right direction. Both left and right end portions of the swing shaft 60 are supported by a pair of sliding bearing portions so as to be swingable. The left and right ends of the swing shaft 60 penetrate the pair of gap adjusting portions 4L and 4R and protrude to the left and right sides. A pair of ring members 600 </ b> L and 600 </ b> R are fixed to the outer peripheral surface of the left and right protruding ends of the swing shaft 60.

  The pair of valve body support arms 64R and 64L are made of stainless steel and have a plate shape. The pair of valve body support arms 64R and 64L are fixed to the approximate center of the swing shaft 60 with a predetermined distance therebetween in the left-right direction. The pair of valve body support arms 64R and 64L extends rearward from the swing shaft 60 in the valve closed state.

  The cylinder 61 is swingably attached to the right rear corner of the top surface of the top plate 50 of the housing 5 via a bracket 610. The reciprocating rod 62 is made of stainless steel and has a round bar shape extending in the front-rear direction. The rear end of the reciprocating rod 62 is connected to the cylinder 61 so as to be able to enter and exit.

  The connecting arm 63 is made of stainless steel and has an L shape. One end of the L-shape of the connecting arm 63 is swingably connected to the front end of the reciprocating rod 62. On the other hand, the other L-shaped end of the connecting arm 63 is fixed to the right end of the swing shaft 60.

  The valve body 3 is made of stainless steel, and has a bowl shape with a shallow bottom, as indicated by a one-dot chain line in FIG. The valve body 3 has a substantially circular recess 30 that opens upward. The recess 30 has an inclined surface 300. The inclined surface 300 has a curved surface shape. The inclined surface 300 (specifically, the tangential direction of the inclined surface 300) extends in a direction that intersects at an acute angle with respect to the up-down direction (downward direction of the medicine P). In the closed state, the valve body 3 is fixed to the upper part of the valve body support arms 64R and 64L. In the closed state, the valve body 3 is disposed below the chute 2.

[Positional relationship between valve body and chute in the closed state]
Next, the positional relationship between the valve body 3 and the chute 2 in the valve closed state will be described. As shown in FIGS. 3 and 4, the discharge port 20 and the valve seat 21 at the lower end of the chute 2 are accommodated in the recess 30 of the valve body 3. The chute 2 and the valve body 3 are not in contact with each other. That is, a gap C is set between the valve seat 21 and the valve body 3. The gap C is sealed with a chemical P that flows down from the discharge port 20 and accumulates in the concave portion 30 of the valve body 3. In other words, the gap C is sealed by the medicine P itself that is a sealing target.

[Configuration of a pair of gap adjusting portions and a pair of sliding bearing portions]
Next, the structure of a pair of clearance adjustment parts 4L and 4R and a pair of sliding bearing part is demonstrated. In addition, the configuration, movement, and effect of the pair of left and right clearance adjustment portions 4L and 4R and the pair of left and right sliding bearing portions are the same. Further, the arrangement is symmetrical. Therefore, hereinafter, only the right gap adjusting portion 4R and the sliding bearing portion will be described, and the left gap adjusting portion 4L and the sliding bearing portion will also be described.

  FIG. 5 is a perspective view of the gap adjusting portion of the powder cutting device according to the present embodiment. FIG. 6 is an exploded perspective view of the gap adjusting unit. As shown in FIGS. 5 and 6, the gap adjustment portion 4R includes a movable block 40R, a fixed block 41R, a front / rear adjustment plate 42R, a vertical adjustment plate 43R, four fixing bolts 412R, and a front / rear adjustment bolt 420R. And a front / rear adjustment nut 421R, two vertical adjustment bolts 430R, and two vertical adjustment nuts 431R.

  The movable block 40R is made of stainless steel and has a rectangular plate shape. A small-diameter shaft insertion hole 400 </ b> R that penetrates in the left-right direction is formed in the right center of the movable block 40 </ b> R. Four large-diameter bolt insertion holes 401R that penetrate in the left-right direction are formed in the four corners of the right surface of the movable block 40R.

  The fixed block 41R is made of stainless steel and has a rectangular plate shape. The fixed block 41R is juxtaposed to the left of the movable block 40R. A large-diameter shaft insertion hole 410R that penetrates in the left-right direction is formed in the approximate center of the right surface of the fixed block 41R. The large-diameter shaft insertion holes 410R are arranged in series on the left side of the small-diameter shaft insertion holes 400R. Four small-diameter bolt insertion holes 411R that penetrate in the left-right direction are formed in the four corners of the right surface of the fixed block 41R. The small diameter bolt insertion holes 411R are arranged in series on the left side of the large diameter bolt insertion holes 401R.

  The slide bearing portion 7R is made of a bronze base metal and has a short shaft cylindrical shape having a flange portion 70R at the right end. The plain bearing portion 7R is press-fitted into the small diameter shaft insertion hole 400R from the right side. A swing shaft 60 is inserted inside the slide bearing portion 7R in the radial direction.

  The swing shaft 60 passes through the movable block 40R and the fixed block 41R from the right to the left. Specifically, the oscillating shaft 60 penetrates the sliding bearing portion 7R in the radial direction (that is, the small diameter shaft insertion hole 400R) and the large diameter shaft insertion hole 410R. Here, the outer diameter of the swing shaft 60 is substantially the same as the inner diameter of the sliding bearing portion 7R. For this reason, the outer peripheral surface of the swing shaft 60 is supported by the inner peripheral surface of the sliding bearing portion 7R so as to be swingable. On the other hand, a gap is defined between the outer peripheral surface of the swing shaft 60 and the inner peripheral surface of the large-diameter shaft insertion hole 410R. Further, the left surface of the ring member 600R fixed to the swing shaft 60 is in sliding contact with the right surface of the flange portion 70R of the sliding bearing portion 7R.

  Each of the four fixing bolts 412R passes through the movable block 40R from the right to the left, and is fixed to the fixed block 41R. Specifically, the fixing bolt 412R passes through the large-diameter bolt insertion hole 401R and is screwed into the small-diameter bolt insertion hole 411R. A gap is defined between the outer peripheral surface of the fixing bolt 412R and the inner peripheral surface of the large-diameter bolt insertion hole 401R.

  As will be described later, a gap between the outer peripheral surface of the swing shaft 60 and the inner peripheral surface of the large-diameter shaft insertion hole 410R, and between the outer peripheral surface of the fixing bolt 412R and the inner peripheral surface of the large-diameter bolt insertion hole 401R. The position of the rocking shaft 60, that is, the valve body 3 in the vertical direction and the front-rear direction is adjusted using the gap.

  The front / rear adjustment plate 42R is made of stainless steel and has a rectangular plate shape. The front / rear adjustment plate 42R is disposed in front of the movable block 40R. A bolt insertion hole 422R that penetrates in the front-rear direction is formed in the front surface of the front-rear adjustment plate 42R. The front / rear adjustment bolt 420R is inserted through the bolt insertion hole 422R from the front via a front / rear adjustment nut 421R. The front end (rear end) of the front / rear adjustment bolt 420R is in contact with the front surface of the movable block 40R.

  The vertical adjustment plate 43R is made of stainless steel and has a rectangular plate shape. The vertical adjustment plate 43R is disposed below the movable block 40R. A pair of bolt insertion holes 432R penetrating in the vertical direction is formed in the upper surface of the vertical adjustment plate 43R. The pair of vertical adjustment bolts 430R is inserted into the pair of bolt insertion holes 432R from below through a pair of vertical adjustment nuts 431R. The tips (upper ends) of the pair of vertical adjustment bolts 430R are in contact with the lower surface of the movable block 40R.

[Movement of powder cutting device]
Next, the movement of the powder cutting device 1 of this embodiment will be described. FIG. 7 shows a cross-sectional view in the front-rear direction in the valve open state of the powder cutting device of the present embodiment. In FIG. 7, members arranged on the right side of the cross section are indicated by a one-dot chain line.

  In the valve-closed state, as shown in FIGS. 3 and 4, the concave portion 30 of the valve body 3 covers the discharge port 20 and the valve seat 21 at the lower end of the chute 2 with a predetermined gap C secured. For this reason, the chemical P stays in the hopper 90, the flange 91, and the chute 2.

  When the amount of the medicine P in the hopper 90 measured by a load cell (not shown) reaches a predetermined amount for bagging, the valve body 3 is changed from the closed state shown in FIGS. 3 and 4 to the opened state shown in FIG. Switch to Specifically, as shown in FIG. 2, the reciprocating rod 62 moves rearward and is immersed in the cylinder 61. A connecting arm 63 is swingably connected to the front end of the reciprocating rod 62. For this reason, when the reciprocating rod 62 moves rearward, the connecting arm 63 swings around the axis of the swing shaft 60 in the clockwise direction in FIGS. . Here, the connecting arm 63, the swing shaft 60, the pair of valve body support arms 64R and 64L, and the valve body 3 are fixed so as not to move with respect to each other. Therefore, when the connecting arm 63 swings, the swing shaft 60 swings while being supported by the sliding bearing portion 7R (see FIG. 6). In addition, the pair of valve body support arms 64R and 64L and the valve body 3 also swing. The oscillating valve element 3 comes into contact with the tip of the stopper 52 and stops.

  As described above, the driving force of the cylinder 61 is transmitted to the valve body 3 via the reciprocating rod 62 → the connecting arm 63 → the swing shaft 60 → the pair of valve body support arms 64R and 64L. The valve body 3 swings in the clockwise direction in FIGS. 3 and 7 by the driving force. In this manner, the valve body 3 is switched from the valve closed state to the valve open state. When the valve body 3 is opened, the chemical P staying in the hopper 90, the flange 91, and the chute 2 is discharged from the discharge port 20 of the chute 2. The discharged medicine P is packed in a bag.

  After the medicine P is discharged, the valve body 3 is switched from the open state to the closed state again. Then, by opening and closing the valve bodies of the upper three powder cutting devices 1 shown in FIG. 1, a predetermined amount of a predetermined chemical is introduced into the hopper 90.

[How to adjust the gap between the valve seat and valve body]
Next, the adjustment method of the clearance gap C between the valve seat 21 and the valve body 3 of the powder cutting device 1 of this embodiment is demonstrated. The adjustment of the gap C is performed according to the type of the chemical P that stays in the hopper 90.

  FIG. 8 shows a cross-sectional view in the left-right direction near the swing axis of the powder cutting device of the present embodiment. FIG. 8A shows a state before the gap adjustment, and FIG. 8B shows a state after the gap adjustment. Note that, for convenience of explanation, the cutting position is different between the cross section of the left gap adjustment section 4L and the cross section of the right gap adjustment section 4R. That is, the cross section of the left gap adjusting portion 4L is a cross section of the swing shaft 60 insertion portion. On the other hand, the cross section of the right gap adjusting portion 4R is a cross section of the two front fixing bolts 412R insertion portions of the four fixing bolts 412R.

  As described above, the gap C1 is defined between the swing shaft 60 and the large-diameter shaft insertion hole 410L of the fixed block 41L. In addition, a gap C2 is defined between the fixed bolt 412R and the large-diameter bolt insertion hole 401R of the movable block 40R.

  As an example, a case where the gap C between the valve seat 21 and the valve body 3 is narrowed will be described. First, the fixing bolts 412R and 412L are loosened. Then, the pressure contact state between the movable blocks 40R and 40L and the fixed blocks 41R and 41L is released. Next, the vertical adjustment bolts 430R and 430L are screwed and moved upward. Here, the upper ends of the vertical adjustment bolts 430R and 430L are in contact with the lower surfaces of the movable blocks 40R and 40L. For this reason, when the vertical adjustment bolts 430R and 430L are moved upward, the movable blocks 40R and 40L are also moved upward. Specifically, the movable blocks 40R and 40L move upward while consuming the gap C2 between the fixing bolt 412R and the large-diameter bolt insertion hole 401R.

  Here, the swing shaft 60 is swingably supported by the movable blocks 40R and 40L via the sliding bearing portion 7L. In addition, the valve body 3 is fixed to the swing shaft 60 via a pair of valve body support arms 64R and 64L (see FIG. 2). For this reason, when the movable blocks 40R and 40L are moved upward, the swing shaft 60 and the valve body 3 are also moved upward. Specifically, the swing shaft 60 and the valve body 3 move upward while consuming the gap C1 between the swing shaft 60 and the large-diameter shaft insertion hole 410L.

  When the valve body 3 moves upward, the valve body 3 approaches the valve seat 21 correspondingly. For this reason, the clearance gap C between the valve seat 21 and the valve body 3 becomes small. Thereafter, the fixing bolts 412R and 412L are tightened. Then, the movable blocks 40R and 40L and the fixed blocks 41R and 41L are pressed so as not to move relatively.

  In this way, the gap C is reduced. When the gap C is increased, the vertical adjustment bolts 430R and 430L are screwed in the opposite direction to the case where the gap C is decreased. Then, the vertical adjustment bolts 430R and 430L are moved downward.

  Further, the gap adjusting portions 4L, 4R can adjust not only the vertical position of the valve body 3, but also the front-rear direction position. In this case, after loosening the fixing bolts 412R and 412L, as shown in FIGS. 2, 5, and 6, the front and rear adjustment bolts 420R and 420L are screwed to move the movable blocks 40R and 40L forward or backward. Let Then, the swing shaft 60 and the valve body 3 are moved forward or backward. Adjustment of the position of the valve body 3 in the front-rear direction is performed, for example, when the valve body 3 and the chute 2 are aligned.

[Function and effect]
Next, the effect of the powder cutting device 1 of this embodiment is demonstrated. According to the powder cutting device 1 of the present embodiment, the valve body 3 and the chute 2 are not in contact with each other not only in the valve opening state but also in the valve closing state. That is, as shown in FIG. 4, a gap C is secured between the valve seat 21 and the valve body 3. In the valve closed state, the chemical P flows down from the discharge port 20 to the concave portion 30 of the valve body 3 through the gap C. Then, the chemical P is deposited in the recess 30. For this reason, the gap C is sealed by the deposited chemical P itself.

  According to the powder cutting device 1 of this embodiment, since the gap C is ensured between the valve seat 21 and the valve body 3 in the valve-closed state, the chemical P is not easily caught. Moreover, since the chemical | medical agent P is hard to be bitten in, the chemical | medical agent P and the valve seat 21 or the valve body 3 do not slide easily in a valve closing state. Therefore, according to the powder cutting device 1 of the present embodiment, the durability of the valve seat 21 or the valve body 3 with respect to long-term use is high.

  Moreover, according to the powder cutting device 1 of this embodiment, since the valve seat 21 and the valve body 3 are non-contact, when switching from a valve opening state to a valve closing state, the chemical | medical agent P is hard to break. Moreover, since the chemical | medical agent P is hard to break, even if it is the chemical | medical agent P in which a property changes by being broken, it can be handled. That is, according to the powder cutting apparatus 1 of this embodiment, the versatility with respect to the kind of chemical | medical agent P is high. For this reason, all kinds of chemicals P can be measured and mixed.

  In addition, the powder cutting device 1 of the present embodiment includes a pair of gap adjustment units 4R and 4L. For this reason, as shown in FIGS. 8A and 8B, the clearance C between the valve seat 21 and the valve body 3 can be adjusted by screwing the vertical adjustment bolts 430R and 430L. Therefore, according to the kind of chemical | medical agent P, the clearance gap C in a valve closing state can be optimized. Further, the gap adjusting portions 4L, 4R can adjust not only the vertical position of the valve body 3, but also the front-rear direction position. For this reason, the alignment operation | work with the valve body 3 and the chute | shoot 2 is easy.

  Further, according to the powder cutting device 1 of the present embodiment, the cylinder 61 is arranged outside the housing 5 as shown in FIG. For this reason, there is little possibility that the medicine P enters the cylinder 61.

  Further, the powder cutting device 1 of the present embodiment includes sliding bearing portions 7R and 7L. For this reason, compared with the case where a rolling bearing is used to support the oscillating shaft 60, problems due to the penetration of the chemical P are less likely to occur.

  Further, according to the powder cutting device 1 of the present embodiment, as shown in FIG. 3, the valve seat 21 is accommodated in the concave portion 30 of the valve body 3 in the valve-closed state. For this reason, the chemical P is unlikely to spill from the recess 30 of the valve body 3. Therefore, the sealing performance in the valve closed state is improved. The recess 30 has an inclined surface 300. The inclined surface 300 extends in a direction intersecting at an acute angle with respect to the flow-down direction of the medicine P. For this reason, the chemical | medical agent P which collided with the valve body 3 of a valve closing state rebounds in the center direction of the recessed part 30. FIG. Therefore, the chemical P is easily deposited in the center of the recess 30. That is, the chemical P is unlikely to spill out of the recess 30. Also in this point, the sealing performance in the valve closed state is improved.

  Further, according to the powder cutting device 1 of the present embodiment, the stopper 52 is disposed in the housing 5 as shown in FIG. For this reason, the position of the valve body 3 in the valve open state can be regulated.

  Moreover, the chemical | medical agent P has oil oozing property. However, the valve seat 21 and the valve body 3 are not in contact with each other. For this reason, when switching from the valve open state to the valve closed state, the chemical P is not easily broken. Therefore, it can suppress that the adhesiveness of the chemical | medical agent P becomes high by the oozed oil.

[Others]
The embodiment of the powder cutting device of the present invention has been described above. However, the embodiment is not particularly limited to the above embodiment. Various modifications and improvements that can be made by those skilled in the art are also possible.

  For example, the power of the cylinder 61 is not particularly limited. It may be hydraulic or pneumatic. In addition, a motor or a solenoid may be used as the drive unit. Moreover, in the said embodiment, although the bowl-shaped valve body 3 was used, you may use a bottomed cylindrical valve body. Moreover, you may use not only a substantially perfect circle shape but the valve body of polygonal shape (a triangle shape, square shape, pentagon shape, etc.).

  Moreover, the kind of chemical | medical agent P is not specifically limited, either. For example, carbon black, vulcanizing agent, vulcanization accelerator, vulcanization aid, anti-aging agent, processing aid, softening agent, flame retardant, colorant, plasticizer can be used alone or in combination of two or more. May be used.

  As the carbon black, various grades such as SAF class, ISAF class, HAF class, MAF class, FEF class, GPF class, SRF class, FT class, MT class and the like can be used. Examples of the vulcanization accelerator include thiazole accelerators, thiuram accelerators, N-cyclohexyl-2-benzothiazylsulfenamide (CBS), dibenzothiazyl disulfide (MBTS), and 2-mercaptobenzothiazole. Sulfenamide accelerators such as (MBT) and tetramethylthiuram monosulfide (TMTM) can be used. Moreover, as a vulcanization | cure adjuvant, zinc oxide, magnesium oxide, etc. can be used, for example. As processing aids, for example, stearic acid, fatty acid esters, fatty acid amides, hydrocarbon resins, and the like can be used.

  Examples of the antiaging agent include carbamate type antiaging agent, phenylenediamine type antiaging agent, phenol type antiaging agent, diphenylamine type antiaging agent, quinoline type antiaging agent, imidazole type antiaging agent, waxes and the like. Can be used. In particular, the powder cutting device of the present invention is suitable for handling an anti-aging agent of a type having a low melting point and easily exuding oil by heating and sliding.

  Moreover, the material of the sliding bearing portions 7R and 7L is not particularly limited. In addition to the bronze base metal, iron-based sintered material, copper, polyamide-based resin, or the like may be used. Further, the sliding bearing portions 7R and 7L may be formed by coating PTFE (polytetrafluoroethylene) on the surface of the metal material.

1 is a cross-sectional view in the front-rear direction of a weighing device provided with a powder cutting device according to an embodiment of the present invention. It is a perspective view of the powder cutting device. It is sectional drawing of the front-back direction of the powder cutting device. FIG. 4 is an enlarged view in a circle IV in FIG. 3. It is a perspective view of the clearance gap adjustment part of the powder cutting device. It is a disassembled perspective view of the clearance gap adjustment part. It is a front-back direction sectional view in the valve opening state of the powder cutting device. (A) is the left-right direction sectional drawing before the clearance gap adjustment of the rocking | swiveling axis vicinity of the powder cutting device. (B) is a cross-sectional view in the left-right direction after adjusting the gap in the vicinity of the swing axis of the powder cutting device.

Explanation of symbols

1: powder cutting device, 2: chute (cylinder), 3: valve body, 4L: clearance adjustment part, 4R: clearance adjustment part, 5: housing, 6: valve body opening / closing part, 7L: sliding bearing part, 7R : Sliding bearing part, 9: Metering device.
20: discharge port, 21: valve seat, 30: recess, 40L: movable block, 40R: movable block, 41L: fixed block, 41R: fixed block, 42R: front / rear adjustment plate, 43R: vertical adjustment plate, 50: top plate 51: Housing body, 52: Stopper, 60: Oscillating shaft, 61: Cylinder (driving unit), 62: Reciprocating rod, 63: Connection arm, 64L: Valve body support arm, 64R: Valve body support arm, 70R: Flange part, 90: hopper, 91: flange.
300: Inclined surface, 400R: Small diameter shaft insertion hole, 401R: Large diameter bolt insertion hole, 410L: Large diameter shaft insertion hole, 410R: Large diameter shaft insertion hole, 411R: Small diameter bolt insertion hole, 412R: Fixing bolt, 420L: Front / rear adjustment bolt, 420R: Front / rear adjustment bolt, 421R: Front / rear adjustment nut, 422R: Bolt insertion hole, 430L: Up / down adjustment bolt, 430R: Up / down adjustment bolt, 431R: Up / down adjustment nut, 432R: Bolt insertion hole, 500: Chute insertion 520: nut, 600L: ring member, 600R: ring member, 610: bracket.
C: gap, C1: gap, C2: gap, P: chemical (powder).

Claims (5)

A cylinder having a discharge port for discharging the powder, and a valve seat disposed at the rim of the discharge port;
An open state that is disposed below the discharge port and is spaced apart from the valve seat and discharges the powder from the cylinder, and approaches the valve seat and causes the powder to stay in the cylinder. A saucer-like valve body that can be switched to a closed state;
A powder cutting device comprising:
In the closed state, Ri contactless der from said valve body and said cylinder,
Further, by moving the valve body, the powder cutout and wherein the Rukoto that having a gap adjusting unit for adjusting the gap between the valve body and the valve seat in the closed state.   Further, a housing that accommodates the valve seat and the valve body therein,
  A swinging shaft to which the valve body is fixed directly or indirectly, and a drive unit that is arranged outside the housing and can be switched between the valve open state and the valve closed state by swinging the swinging shaft. And a valve body opening and closing part having,
The powder cutting device according to claim 1, comprising:   The powder cutting device according to claim 2, further comprising a sliding bearing portion that supports the swing shaft.   The valve body has an eaves-like recess having an inclined surface that opens upward in the valve-closed state and extends in a direction intersecting at an acute angle with respect to the flow-down direction of the powder,
  The powder cutting device according to any one of claims 1 to 3, wherein the valve seat is accommodated in the recess when the valve is closed.   The powder cutting device according to any one of claims 1 to 4, wherein the powder has liquid exudation properties.

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