JP5184969B2 - Rotary press - Google Patents

Description

  The present invention relates to a rotary press that rotates a roller column to which a pair of upper and lower upper compression rollers and a lower compression roller are attached in a rotary press (also referred to as a rotary material powder compression molding machine or a tableting machine) that compresses tablets. .

  The “rotor block” referred to in the present invention includes an upper arm cam guide, an upper arm rotor, a mortar rotor, a lower arm rotor, and a lower arm cam guide. The upper arm rotor is a rotating disk that holds and rotates the upper arm, the mortar rotor is a rotating disk that rotates and holds the mortar, and the lower arm rotor is a rotating disk that holds and rotates the lower arm. On the other hand, the upper eyelid cam guide is a fixed disk that forms a cam track that restricts the raising and lowering of the upper eyelid that goes around, and the lower eyelid cam guide is a fixed disk that forms a cam track that restricts the raising and lowering of the lower eyelid.

  The upper compression roller is a roller that pushes down the upper eyelid, and the lower compression roller is a roller that pushes up the lower eyelid. The upper compression roller and the lower compression roller are arranged in a pair of upper and lower opposing relations, and are usually used for preliminary compression (upper preliminary compression roller and lower preliminary compression roller) on the upstream and downstream sides of the upper and lower rotors. Two sets are arranged in order of compression (upper book compression roller and lower book compression roller). In the present invention, for convenience of explanation, the upper compression roller is used as a term including the upper main compression roller and the upper preliminary compression roller, and the lower compression roller is used as a term including the lower main compression roller and the lower preliminary compression roller.

  In recent rotary presses, a configuration in which the rotor block can be removed from the rotating shaft for cleaning and maintenance is increasing. In the rotor block, an upper rod rotor and a lower rod rotor are sandwiched between a pair of upper and lower upper compression rollers and a lower compression roller. The rotor block is typically configured to be removed by pulling upward from the rotation shaft. From now on, when removing the rotor block from the rotating shaft, it is necessary to avoid interference between the upper and lower rotors and the upper and lower compression rollers. The upper compression roller and the lower compression roller are retracted from the operating position using some means.

  In Patent Document 1, an upper bearing block UB (bearing means) on which an upper precompression roller (precompression roll 71) and an upper main compression roller (main compression roll 72) are pivotally mounted is used as a rotor block (rotary disc 3). In contrast, it uses a method of retreating and avoiding interference. Specifically, a rack RK is provided on the upper bearing block UB, and the upper pre-compression roller and the upper main compression are integrated with the bearing block UB by turning the pinion PN of the linear movement device MD engaged with the rack RK. Retract the roller behind the rotor block. As a result, as long as the rotor block is pulled upward, interference between the rotor block, the upper preliminary compression roller, and the upper main compression roller can be avoided (Patent Documents 1 [0019] [0020] [0025]).

JP 2002-239798 JP

  If only considering avoiding the interference with the upper and lower rotors for the purpose of exchanging the rotor block, the rotor block needs to be lifted upward in order to be pulled out from the rotating shaft as in Patent Document 1. The upper preliminary compression roller and the upper main compression roller located above the rotor block may be retracted. However, the retracting of the upper pre-compression roller and the upper main compression roller is useful in the case where the rotor block is spaced from the upper pre-compression roller and the upper main compression roller, and simple maintenance and cleaning are performed without removing the rotor block. It also has a function. From this, it is preferable that not only the upper preliminary compression roller and the upper main compression roller but also the lower preliminary compression roller and the lower main compression roller can be retracted.

  However, as in Patent Document 1, if the upper compression roller is an upper set and the lower compression roller is separately retracted as a lower set, the retracted upper compression roller and lower compression roller are placed in the operating position. When returning, there is a risk that the positional relationship between the upper preliminary compression roller and the lower preliminary compression roller and the positional relationship between the upper main compression roller and the lower main compression roller, which are a pair of upper and lower sides, may be shifted. From this, when referring to Patent Document 1, it is conceivable that the upper compression roller and the lower compression roller, which are a pair of upper and lower sides, are paired and retracted or restored. However, even in this case, it is necessary to specify the positional relationship between the upper compression roller and the lower compression roller with respect to the rotor block. And, the mechanism for specifying the positional relationship is not manually operated and is automated as much as possible, so that the positional relationship is specified accurately and labor and time are reduced.

  Thus, as long as the rotary press disclosed in Patent Document 1 is referred to, it is difficult to realize a configuration in which all of the upper preliminary compression roller, the lower preliminary compression roller, the upper main compression roller, and the lower main compression roller are retracted. Therefore, a mechanism is provided that can accurately and automatically specify the positional relationship between the upper compression roller and the lower compression roller relative to the rotor block without breaking the positional relationship between the upper compression roller and the lower compression roller. Considered to develop a rotary press.

  What has been developed as a result of the examination is that the upper collar held by the upper arm rotor of the rotor block mounted in the apparatus frame is pushed down by the upper compression roller, and the lower arm held by the lower arm rotor of the rotor block is lowered by the lower compression roller. In a rotary press that pushes up, a roller column with an upper block and a lower block built in a column outer cylinder is erected in the vicinity of the rotor block, and the upper compression roller is pivotally attached to the upper block in a pair of upper and lower positions. The roller column is provided with elevating means for moving the upper block and the lower block individually up and down with respect to the column outer cylinder, and the upper and lower blocks are rotated together with the column outer cylinder. A pin holding part for holding a position pin by providing a frame flange having a means for opening a frame pin hole in the apparatus frame Provided in the upper block or lower block, the upper compression roller is lowered or the lower compression roller is raised, so that the tip holding part of the position pin is fitted into the frame pin hole, and the upper compression roller and the lower compression with respect to the turning direction This is a rotary press that specifies the operating position of the roller.

  Here, as the rotation means for rotating the upper block and the lower block together with the column outer cylinder, various conventionally known drive means can be used. Specifically, a rotary motor is disposed on the ceiling surface of the apparatus frame or below the support surface on which the rotor block is placed, and the upper block and the lower block are engaged with the shaft attachment portions of the upper compression roller and the lower compression roller, respectively. If the rotational power of the rotary motor is transmitted to the lower block in a state where the lower block and the column outer cylinder are connected by engaging the column outer cylinder and the column key is engaged, the upper block and the lower block together with the column outer cylinder are transmitted. The structure which rotates a block integrally can be illustrated. Also, conventionally known various driving means can be used as the raising / lowering means for individually raising and lowering the upper block and the lower block with respect to the column outer cylinder. Specifically, a rotary motor is placed on the ceiling surface of the equipment frame or below the support surface on which the rotor block is placed, and the upper screw shaft that receives rotational power from the rotary motor is engaged with the upper block and rotated from the rotary motor. The structure of the screw raising / lowering mechanism comprised by meshing the lower screw shaft which receives motive power with a lower block can be illustrated.

  The rotary press according to the present invention comprises a pair of upper and lower upper compression rollers (upper pre-compression roller and upper main compression roller) and lower compression roller lower pre-compression roller and lower main compression roller). Alternatively, it is pivotally attached to the lower block, and the upper compression roller and the lower compression roller are swung from the operating position to the retracted position in accordance with the rotation of the roller column. Since the upper compression roller and the lower compression roller only pivot in the horizontal plane, the positional relationship between the upper compression roller and the lower compression roller can be accurately identified as long as the operating positions of the upper compression roller and the lower compression roller can be identified. In view of this, the present invention relates to an upper compression roller and a frame pin hole that is opened in a frame flange provided in the apparatus frame by fitting a position pin held in a pin holding portion provided in the upper block or the lower block. Specify the operating position of the lower compression roller.

  When the position pin is fitted into the frame pin hole, if the both are slightly displaced, the position pin may not be fitted into the frame pin hole well. Therefore, the position pin is at least a conical shape or a truncated cone shape that is a tapered side surface tapered from the pin holding portion, and the frame pin hole is an inverted frustum shape having an inner peripheral surface that contacts the tapered side surface of the position pin. did. As a result, when the position pin is fitted into the frame pin hole, even if the position pin is slightly displaced with respect to the frame pin hole, there is no risk that the position pin will be lifted or lowered out of the frame pin hole. The operating positions of the upper compression roller and the lower compression roller can be accurately specified by being closely fitted to the frame pin hole. This means that the operating positions of the upper compression roller and the lower compression roller can be reliably specified with reference to the frame pin hole of the frame flange provided in the apparatus frame.

  If the position pins are provided on both the upper block and the lower block, the operating positions of the upper compression roller and the lower compression roller can be specified with certainty. The position pin of the block may be displaced, and the positional relationship between the upper compression roller and the lower compression roller may be shifted. Therefore, the roller column is provided with a column flange with a column pin hole in the column outer cylinder, and lowers the upper compression roller or raises the lower compression roller at the operating position, so that the tip from the pin holding part of the position pin is framed. The operation positions of the upper compression roller and the lower compression roller with respect to the turning direction were specified by fitting the pin holes and the column pin holes. That is, a position pin is provided only on one of the upper block and the lower block, and the positional relationship between the upper block and the column outer cylinder (or the lower block and the column outer cylinder) with respect to the apparatus frame is specified by the position pin, whereby the column outer cylinder The lower block (or the upper block) is positioned through the position of the upper compression roller and the lower compression roller with one position pin.

  When the column flange is provided on the column outer cylinder, the position pin has at least a conical shape or a truncated cone shape that is a tapered side surface tapered from the pin holding portion, and the frame pin hole and the column pin hole respectively contact the tapered side surface of the position pin. It is set as the structure which is an inverted frustum shape which has an inner peripheral surface to face. In addition, the position pin has a flange portion at a position away from the pin holding portion so that the height of the upper compression roller or the lower compression roller can be adjusted with the position pin fitted in the frame pin hole and the column pin hole. It is preferable to provide a spring between the pin holding part and the collar part. In this case, the spring can be compressed by lowering the upper block or raising the lower block more than fitting the position pin into the frame pin hole and the column pin hole, and the upper compression roller or The height of the lower compression roller can be adjusted. The spring interposed between the pin holding portion and the collar portion may be, for example, a leaf spring or a rubber elastic body as long as the position pin can be biased toward each pin hole, but the coil spring that is loosely fitted to the position pin is the most. Convenient.

  According to the present invention, there is provided a mechanism that can accurately and automatically specify the positional relationship between the upper compression roller and the lower compression roller with respect to the rotor block without breaking the positional relationship between the upper compression roller and the lower compression roller and restored after being retracted. Provided rotary press can be provided. The fact that the positional relationship between the upper and lower upper compression rollers and the lower compression roller is not lost is the effect of attaching the upper compression roller and the lower compression roller to the roller column in a pivotal relationship. In addition, the positional relationship of the upper compression roller and the lower compression roller that have been restored after being retracted with respect to the rotor block can be accurately and automatically specified. This is an effect obtained by fitting the frame pin hole. In addition, the position pin is released from the frame pin hole and the column pin hole in conjunction with the upper block and the lower block that are raised or lowered when the upper compression roller and the lower compression roller are retracted, and conversely, the upper compression roller and the lower compression roller. When the frame is returned, the frame pin hole and the column pin hole can be fitted and positioned in conjunction with the upper block and the lower block that are lowered or raised. This is an effect of automation due to the configuration in which the position pin is moved up and down in conjunction with the upper block or the lower block.

  In the rotary press of the present invention, the position pin is formed in a conical shape or a truncated cone shape, which is a tapered tapered side surface, and the frame pin hole is formed in an inverted frustum shape having an inner peripheral surface contacting the tapered side surface of the position pin. In addition to ensuring that the position pin can be fitted into the frame pin hole, the degree of adhesion in the fitted state can be increased to prevent inadvertent rotation of the roller column. Further, in the rotary press of the present invention, the column flange having the column pin hole opened is provided in the column outer cylinder, and the position pin is fitted into the frame pin hole and the column pin hole, so that the upper block or the lower block and the column outer The positional relationship with the cylinder can be specified. In this case, the column pin hole is also shaped like an inverted frustum having an inner peripheral surface that contacts the tapered side surface of the position pin, so that the position pin can be fitted into the column pin hole without fail. The degree can be increased. In addition, the rotary press of the present invention adjusts the height of the upper compression roller and the lower compression roller in the compression range of the spring by interposing a spring between the pin holding portion and the flange portion of the position pin. Can do.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 is a front view of the rotary press 1 in an operating state to which the present invention is applied (the rotor block 12 is omitted as an imaginary line), FIG. 2 is a horizontal sectional view of the roller column 2 (the rotor block 12 is omitted as an imaginary line), and FIG. 3 is a vertical sectional view of the roller column 2. In FIGS. 1 to 3 and FIGS. 4 to 10 to be described later, for the sake of convenience of explanation, illustrations of parts irrelevant to the present invention are omitted. It is the same structure as a rotary compression molding machine or a tableting machine.

  As shown in FIGS. 1 to 3, the rotary press 1 to which the present invention is applied has a configuration in which a rotor block 12 that rotates in a sealed apparatus frame 11 is built. The apparatus frame 11 is mainly composed of a support base 111, a canopy 113, and a pillar 115 connecting the two, and the rotor block 12 is placed on a support surface 112 that is the upper surface of the support base 111. The rotor block 12 is an assembly in which an upper iron rotor 121, a mortar rotor 125, and a lower iron rotor 123 are overlapped from above. The upper iron rotor 121 has an upper iron 122, the mortar rotor 125 has a mortar 126, and the lower iron rotor 123. Holds the lower arm 124 respectively. The back side including the column 115 of the device frame 11 is usually surrounded and closed by a wall surface panel (not shown). Further, the front side of the pillar 115 is surrounded by an access panel (not shown) that can be freely opened and closed, and is closed in an operating state. Such a basic configuration is the same as a conventional rotary press.

  The roller column 2 has a configuration in which an upper block 22 and a lower block 24 are built in the column outer cylinder 21, and two roller columns 2 are arranged in a pair of left and right relations on the back side of the rotor block 12 mounted on the support surface 112. The rotor block 12 is counterclockwise when viewed from the front side of the rotary press 1, and the upper pre-compression roller and the lower pre-compression roller are disposed on the roller column 2 upstream of the rotor block 12 (right side when viewed from the front of the rotary press 1, right side in FIG. 1). However, the upper main compression roller and the lower main compression roller are assigned to the roller column 2 on the downstream side of the rotor block 12 (left side when viewed from the front of the rotary press 1, left side in FIG. 1). In this example, the upper preliminary compression roller and the upper main compression roller are collectively referred to as an upper compression roller 23, and the lower preliminary compression roller and the lower main compression roller are referred to as a lower compression roller 25.

  The upper compression roller 23 is pivotally attached to the upper roller shaft 231 protruding from the upper block 22 through the upper roller shaft opening 211 provided in the column outer cylinder 21, and is carried by the upper flange rotor 121 that rotates in the operating state of the rotary press 1. Press down on the upper arm 122. In the upper block 22, the upper roller shaft 231 is engaged with the upper roller shaft opening 211 extending vertically from the horizontal direction. Further, the lower compression roller 25 is attached to a lower roller shaft 251 protruding from the lower block 22 through a lower roller shaft opening 212 provided in the column outer cylinder 21, and is rotated in the operating state of the rotary press 1. Push down the upper arm 124 that is carried. The lower block 24 engages the lower roller shaft 251 from the horizontal direction in a lower roller shaft opening 212 extending vertically on the same vertical line as the upper roller shaft 231. The material powder supplied to the mortar 126 is sandwiched between the upper punch 122 and the lower punch 124 and compressed to form a tablet (pellet or tablet).

  The lifting means of the upper block 22 includes an upper block rotating motor 223 and an upper block speed reducer 224 provided on the canopy 113, and an upper screw shaft that is lowered along the axis of the column outer cylinder 21 from the upper block speed reducer 224. 221 and a screw lifting mechanism composed of an upper block female screw portion 222 built in the upper block 22 that meshes with the upper screw shaft 221. Similarly, the elevating means of the lower block 24 is a lower block that rises along the axis of the column outer cylinder 21 from the lower block rotary motor 243 and the lower block reducer 244 provided on the support base 111, and the lower block reducer 244. This is a screw lifting mechanism composed of a screw shaft 241 and a lower block female screw portion 242 built in the lower block 24 that meshes with the lower screw shaft 241. In this way, the upper block 22 and the lower block 24 in this example have independent lifting means, and can be raised and lowered individually.

  The column outer cylinder 21 is provided on the support base 111 by supporting the end surface of the upper end portion on the upper surface receiving bush 225 provided on the canopy portion 113 and supporting the upper side surface on the upper side receiving bush 226 also provided on the canopy portion 113. The lower end receiving bush 245 supports the end surface of the lower end portion, and the lower side receiving bush 246 provided on the support base 111 is also supported. As a result, the roller column 2 of the present example is capable of rotating by sandwiching the column outer cylinder 21 containing the upper block 22 and the lower block 24 between the canopy 113 and the support base 111.

  In this example, the key ring 26 is attached to the lower screw shaft 241, and the rotational power for moving the lower block 24 up and down by engaging the column key 3 supported by the key support portion 35 provided on the column outer cylinder 21 with the key ring 26. Rotating means for utilizing the rotation power of the roller column 2 is configured. Although not shown, the rotation range (rotation angle) of the roller column 2 is determined by disposing limit switches at both ends of the rotation range and stopping the lower block rotary motor 243 as a driving source by each limit switch. I have identified.

  4 is a partially enlarged rear view of the roller column 2 showing a state in which the position pin 4 is fitted to the upper column flange 28, the frame flange 14 and the lower column flange 27. FIG. FIG. 6 is a partially enlarged rear view corresponding to FIG. 4 showing a state of being pulled out from the flange 27, FIG. 6 is a front view corresponding to FIG. 1 showing a state where the upper compression roller 23 and the lower compression roller 25 are retracted by the rotation of the roller column 2. FIG. 3 is a horizontal sectional view corresponding to FIG. 2 showing the same state.

  In this example, as shown in FIGS. 4 and 5, a frame flange 14 (see FIGS. 2 and 3) projecting from the column 115 toward the roller column 2, and the frame flange 14 is sandwiched from the column outer cylinder 21. By inserting the position pin 4 held by the pin holding part 41 protruding from the upper block 22 through the pin holding part opening 213 of the column outer cylinder 21 into the upper and lower upper column flange 28 and lower column flange 27 protruding at The orientation of the upper block 22 and the lower block 24 in the circumferential direction is determined and the orientation is maintained, and the positional relationship between the upper compression roller 23 and the lower compression roller 25 in the operating state is accurately determined. One column flange may be provided, but a pair of upper and lower upper column flanges 28 and 27 are provided in this example in order to prevent tilting of the position pin 4 described later.

  The frame flange 14 is a plate material projecting from the column 115 toward the roller column 2, and has a frame pin hole 141 whose center coincides with the axis of the position pin 4. The lower column flange 27 protrudes from the column outer cylinder 21 toward the column 115 so as to be positioned below the frame flange 14 when the roller column 2 rotates and the position pin 4 is just opposite to each other. A lower column pin hole 271 having a center coincident with the axis of the position pin 4 is opened by a plate material. The frame flange 14 and the lower column flange 27 determine the direction of the roller column 2 in the circumferential direction by inserting the position pin 4 into the respective frame pin hole 141 and the lower column pin hole 271 and maintain the direction. Have

  In this example, an upper column flange 28 that is paired with the lower column flange 27 is provided. The upper column flange 28 is a plate material that protrudes from the column outer cylinder 21 toward the column 115 so as to sandwich the frame flange 14 with the lower column flange 27, and the upper column flange 28 is centered on the lower column pin hole 141. A column pin hole 281 is opened. Further, a flange receiving portion 282 which is a concave surface into which the flange 42 of the position pin 4 is fitted is provided on the upper surface. The upper column flange 28, together with the upper column flange 27, determines the direction of the roller column 2 in the circumferential direction more accurately. When the rotary press 1 is in an operating state, when the upper compression roller 23 and the lower compression roller 25 pressed by the reaction force of the upper rod 122 or the lower rod 124 try to rotate the roller column 2, the lower column pin hole 271 In addition, the position pin 4 is prevented from falling about the frame pin hole 141 with the upper column pin hole 281 interposed therebetween, and the circumferential direction of the roller column 2 is held more stably.

  The pin holding portion 41 is a block that is attached to the lower block 24 and protrudes through a pin holding portion opening 213 provided on the back side of the column outer cylinder 21, and is provided with a pin loosely fitting hole 411 that penetrates vertically. The position pin 4 is a rod body composed of a cylindrical upper stage and a slightly tapered truncated lower stage, and a stopper (nut) 412 is screwed onto a male screw provided at the upper end. The position pin 4 is provided with a flange 42 at the boundary between the upper stage and the lower stage, and is biased downward by a coil spring 43 interposed between the pin holding part 41 and the flange 42. Thus, the height of the position pin 4 can be adjusted within a range where the stopper 412 can be engaged with the pin holding portion 41 and the coil spring 43 can be compressed.

  The upper column pin hole 281, the frame pin hole 141, and the lower column pin hole 271 are arranged from top to bottom in the order described above, and each inner peripheral surface is an inverted shape obtained by transferring the lower outer peripheral surface of the position pin 4. As a truncated cone shape, a tapered surface that tapers downward is formed intermittently. For this reason, even if the axis of the position pin 4 and the upper column pin hole 281, the frame pin hole 141 or the lower column pin hole 271 are shifted, the position pin 4 is rubbed against the inner peripheral surface of each pin hole. By inserting the, the deviation of each axis is eliminated. Further, the position pin 4 is closely fitted to the upper column pin hole 281, the frame pin hole 141 and the lower column pin hole 271, so that the circumferential direction of the roller column 2 can be stably held.

  The position pin 4 moves up and down in conjunction with the upper block 22 that is raised to avoid interference with the rotor block 12 when the upper compression roller 23 is retracted. That is, when the upper block 22 is raised from the state shown in FIG. 4, the position pin 4 is also pulled out from the lower column pin hole 271 and the frame pin hole 141, and the state shifts to a state where the roller column 2 shown in FIG. To do. In this example, a fitting detection sensor (optical sensor) 44 facing the lower column pin hole 271 is provided on the lower surface side of the lower column flange 27. As a result, if the fitting detection sensor 44 can no longer detect the tip of the position pin 4, the position pin 4 is pulled out, and the controller (not shown) determines that the roller column 2 can freely rotate, thereby driving the rotation means. Make it possible. In other words, the fitting detection sensor 44 functions to prevent the roller column 2 from being damaged by not driving the rotation means unless the position pin 4 is pulled out.

  In this way, the upper compression roller 23 is lifted to avoid interference with the rotor block 12, and the roller column 2 which has been released from the restraint by the position pin 4 can be seen in FIG. 6 and FIG. The compression roller 25 rotates in a direction away from the rotor block 12 (the roller column 2 on the left side in FIG. 6 rotates to the right and the roller column 2 on the right side rotates to the left), and the upper compression roller 23 and the lower compression roller 25 are moved to the retracted position. Turn and move. At this time, the positional relationship between the upper compression roller 23 and the lower compression roller 25 in each roller column 2 is maintained except that the upper compression roller 23 is raised. For this reason, the upper compression roller 23 and the lower compression roller 25 that rotate the roller column 2 again to return to the operating position are in the same positional relationship as before the withdrawal except that the vertical direction of the upper compression roller 23 described later can be adjusted.

  FIGS. 8 to 10 are partial vertical sectional views of the roller column 2 showing a procedure for re-fitting the position pin 4 to the frame flange 14 and the lower column flange 27, and FIG. 8 shows the position pin 4 to the frame flange 14 and the lower column. 9 shows a state in which the position pin 4 is inserted into the frame flange 14 and the lower column flange 27, and FIG. 10 shows a state in which the coil spring 43 is contracted to position the position pin 4 in the frame flange 14 and the lower column flange 27. Represents the state of being pushed in.

  The positional relationship of the upper compression roller 23 and the lower compression roller 25 that have returned from the retracted position to the operating position with respect to the rotor block 12 is determined by inserting the position pin 4 into the upper column pin hole 281, the frame pin hole 141, and the lower column pin hole 271. Is reproduced accurately. When the upper compression roller 23 returns to the operating position, as shown in FIG. 8, the position pin 4 is at a height where the lower end is inserted into the upper column pin hole 281 only in the upper column flange 28 in a loosely fitted state. At this time, the lower column pin hole 271 is concentric with the upper column pin hole 281 and the lower column pin hole 271 and the upper column pin hole 281 are moved to a positional relationship sandwiching the frame pin hole 141. Then, if the position pin 4 is lowered as it is, apart from a slight deviation between the pin holes, as shown in FIG. 9, the position pin 4 has the upper column pin hole 281, the frame pin hole 141 and the frame pin hole 141. The lower column pin holes 141 are inserted and fitted in this order.

  By inserting the position pin 4 into the frame pin hole 141 of the frame flange 14, the upper block 22 determines the circumferential direction and holds the direction. Further, the lower block 24 inserts the position pin 4 into the frame pin hole 271 of the lower column flange 27, thereby determining the circumferential direction of the column outer cylinder 21 with reference to the upper block 22, and the column outer cylinder 21. Through the lower roller shaft 251 engaged with the lower roller shaft opening 212 in the horizontal direction, the same circumferential direction as that of the upper block 22 is determined, and the direction is maintained. In this way, the upper block 22 and the lower block 24 have the same circumferential direction determined via the position pins 4, so that the positional relationship between the upper compression roller 23 and the lower compression roller 25 in the operating state can be accurately determined. decide.

  In this example, since the coil spring 43 is interposed between the pin holding portion 41 and the flange portion 42, as shown in FIG. 2, the upper block 22 is further lowered by a range Δ in which the coil spring 43 can be compressed. Can be made. This means that the upper compression roller 23 pivotally attached to the upper block 22 can be further lowered, that is, the height of the upper compression roller 23 can be adjusted within a range Δ in which the coil spring 43 can be compressed. By enabling the height adjustment of the upper compression roller 23 in this way, the pressure of the upper collar 122 (see FIG. 3) for compressing the material powder can be adjusted. In order to be able to adjust the height of the upper compression roller 23 both vertically, for example, the height at which the coil spring 43 is compressed by half may be set to the reference height of the upper block 22.

  This example is an example of the rotary press 1 in which the position pin 4 is provided only on the upper block 22. Although not shown, the rotary press 1 in which the position pin 4 is provided on the lower block 24 can be similarly configured. Alternatively, the rotary press 1 in which the position pins 4 are provided on both the upper block 22 and the lower block 24 may be used. In this case, it is not necessary to restrict the circumferential direction of the upper block 22 and the lower block 24 via the column outer cylinder 21, but in order to determine the direction of the column outer cylinder 21, either the upper block 22 or the lower block 24 is used. It is necessary to provide the upper column flange 28 and the lower column flange 27. The position pins 4 can be freely provided, but may be selected and determined as appropriate depending on, for example, the rotation means of each roller column 2 (arrangement of component elements, etc.).

It is a front view of the rotary press in the operation state to which the present invention is applied. It is a horizontal sectional view of a roller column. It is a vertical sectional view of a roller column. It is a partial enlarged rear view of a roller column showing a state in which position pins are fitted to an upper column flange, a frame flange, and a lower column flange. FIG. 5 is a partially enlarged rear view corresponding to FIG. 4 illustrating a state in which the position pin is pulled out from the frame flange and the lower column flange. FIG. 2 is a front view corresponding to FIG. 1 showing a state in which an upper compression roller and a lower compression roller are retracted by rotation of a roller column. FIG. 3 is a horizontal sectional view corresponding to FIG. 2 showing the same state. It is a partial vertical sectional view of a roller column showing a state in which a position pin is pulled out from a frame flange and a lower column flange. It is a partial vertical sectional view of a roller column showing a state in which a position pin is inserted into a frame flange and a lower column flange. It is a partial vertical sectional view of a roller column showing a state in which a coil spring is contracted and a position pin is pushed into a frame flange and a lower column flange.

Explanation of symbols

1 Rotary press
11 Equipment frame
12 Rotor block
14 Frame flange 2 Roller column
21 Column outer cylinder
22 Upper block
23 Upper compression roller
24 Lower block
25 Lower compression roller
26 Keyring
27 Lower column flange
28 Upper column flange 3 Column key
35 Key support 4 Position pin
41 Pin holder
42 Buttocks
43 Coil spring
44 Mating detection sensor

Claims (5)

In the rotary press where the upper collar held by the upper rotor of the rotor block mounted in the machine frame is pushed down by the upper compression roller, and the lower collar held by the lower rotor of the rotor block is pushed by the lower compression roller, A roller column with an upper block and a lower block built in a cylinder is erected in the vicinity of the rotor block. The roller column is provided with elevating means for individually elevating the upper block and the lower block with respect to the column outer cylinder, and is provided with rotation means for rotating the upper block and the lower block together with the column outer cylinder. An open frame flange is provided in the device frame, and the pin holding part that holds the position pin is the upper block or lower block The upper compression roller is lowered or the lower compression roller is raised, and the tip pin holding part of the position pin is fitted into the frame pin hole to identify the operating positions of the upper compression roller and the lower compression roller with respect to the turning direction. A rotary press characterized by The position pin has a conical shape or a truncated cone shape that is at least a tapered side surface tapered from the pin holding portion, and the frame pin hole has an inverted frustum shape having an inner peripheral surface that contacts the tapered side surface of the position pin. Item 2. The rotary press according to Item 1. The roller column has a column flange with a column pin hole opened in the column outer cylinder, and lowers the upper compression roller or raises the lower compression roller at the operating position, so that the tip of the position pin from the pin holding part is the frame pin hole. The rotary press according to claim 1, wherein the rotary presses are fitted into the column pin holes and the operating positions of the upper compression roller and the lower compression roller with respect to the turning direction are specified. The position pin has a conical or truncated cone shape that is tapered from at least the pin holding portion, and each of the frame pin hole and the column pin hole has an inverted frustum shape having an inner peripheral surface that contacts the tapered side surface of the position pin. The rotary press according to claim 2. The rotary press according to any one of claims 1 to 4, wherein the position pin is provided with a flange portion at a position away from the pin holding portion, and a spring is interposed between the pin holding portion and the flange portion.

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