JP2008133113A - Double collection chute and combined weigher equipped therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a double collection chute type combined weigher having an improved weighing speed. <P>SOLUTION: This double collection chute is provided for the combined weigher having an outside collection chute and an inside collection chute. The upper part of the outside collection chute and the upper part of the inside collection chute have slopes in an approximately inverted truncated cone or approximately polygonal truncated pyramid shape whose center axes are common extending to the vertical direction and whose sizes are mutually different. The lower part of the inside collection chute passes through the outside collection chute, whereby the lower end of the inside collection chute is guided to the outside of the outside collection chute. The lower part of the outside collection chute is formed including the center axis. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a collecting chute and a combination weigher. More specifically, the present invention relates to a double collective chute and a combination scale equipped with the double collective chute.

  A combination weigher is often used in conjunction with a packaging machine so that the weighed objects are packaged almost automatically. When the weighing speed (pieces / minute) of the combination weigher is equal to the packaging speed (pieces / minute) of the packaging machine, weighing and packaging are performed in synchronization with the processing of the combination weighing machine and the packaging machine.

  In recent years, the packaging speed of the packaging machine has been improved by the improvement of the packaging machine. With the improvement in packaging speed, it is necessary to improve the weighing speed of the combination weigher. As a technique for improving the measurement speed, there is a double collective chute type combination weigher disclosed in Patent Documents 1 to 3.

  FIG. 15 is a diagram showing the configuration of the double collective chute disclosed in Patent Document 1. As shown in FIG. As shown in FIG. 15, in the double collective chute 200 of Patent Document 1, the inner collective chute 201 penetrates the outer collective chute 202. The discharge port 203 of the inner collecting chute 201 and the discharge port 204 of the outer collecting chute 202 are formed so as to be symmetrical with respect to the central axis of the combination weigher. That is, both the discharge port 203 and the discharge port 204 are circular and do not include the central axis of the combination weigher.

FIG. 16 is a front view of the double assembly chute disclosed in Patent Document 2 and Patent Document 3. FIG. 17 is a side view of the double assembly chute disclosed in Patent Document 2 and Patent Document 3. As shown in FIGS. 16 and 17, in the double collective chute 210 of Patent Document 2 and Patent Document 3, the upper part of the outer collective chute is divided into a first primary outer collective chute 211 and a second primary outer collective chute 212. A secondary outer collective chute 213 is formed at the bottom to combine the two outlets of the primary outer collective chute together. The inner collective chute is formed with an upper primary inner collective chute 214 and a lower secondary inner collective chute 215. Referring to the coordinate axes in the figure, the secondary outer collective chute 213 is formed to extend obliquely downward toward the negative direction of the Z axis. The secondary inner collecting chute 215 is formed to extend obliquely downward toward the positive direction of the Z axis. As a result, the discharge port 216 of the secondary outer collecting chute 213 and the discharge port 217 of the secondary inner collecting chute 215 are positioned symmetrically with respect to the central axis of the combination weigher. The discharge port 216 and the discharge port 217 are both circular and are provided at a predetermined distance from the central axis of the combination weigher.
Japanese Utility Model Publication No. 61-84821 Japanese Utility Model Publication No. 62-30122 JP-A-8-152353

  In the conventional configuration, a plurality of hoppers are disposed above the collecting chute. Depending on the position of the hopper, the length of the path to the outlet of the collecting chute differs.

  As shown in FIG. 15, in the double collective chute of Patent Document 1, the path passing through the point D on the opposite side of the discharge port 204 among the upper ends of the outer collective chute (the path between the points DD ′) is the most. become longer. The path between the points D and D ′ is not only a long straight line distance from the discharge port 204, but also needs to bypass the inner collecting chute 201, so that the path becomes particularly long.

  As shown in FIG. 16 and FIG. 17, in the double chutes of Patent Document 2 and Patent Document 3, the path from the upper end of the collective chute to the discharge port can be leveled. Since they are once combined into two and then combined into one, the structure of the chute becomes complicated. In addition, the vertical width of the chute is increased, resulting in a longer path.

  Thus, in the conventional configuration, since the distance of the path passing through the collective chute is long, there is a problem that the time required for one weighing cycle becomes long and the measuring speed cannot be sufficiently improved.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to improve the measuring speed in a double collective chute combination weigher.

  The inventor diligently studied a technique for improving the measuring speed in the double collective chute type combination weigher. As a result, I noticed the following points.

  When the distance that the object to be weighed is discharged from the hopper and reaches the packaging machine (hereinafter referred to as “sliding distance”) increases, even if the object to be weighed is discharged at the same time, the object that reaches the packaging machine quickly becomes slow. The time difference from what is reached is increased (stringing phenomenon, string out). As a result, the time required for one weighing cycle becomes longer and the weighing speed becomes slower.

  In particular, since the outer collective chute has a larger diameter at the inlet opening than the inner collective chute, the sliding distance is inevitably longer. The metering cycle also needs to be lengthened in accordance with a path passing through the outer collecting chute (hereinafter referred to as a path on the outer collecting chute). That is, the sliding distance of the objects passing through the outer collective chute (the length of the path on the outer collective chute) is the largest constraint in shortening the weighing cycle of the entire apparatus. In addition, if the diameter is large, the inclination of the path to the discharge port with respect to the horizontal plane becomes gradual, and the sliding speed tends to be slow.

  Based on this knowledge, the present inventor has conceived that if the sliding distance when passing through the outer collective chute is preferentially shortened with respect to the inner collective chute, the sliding distance can be leveled as a whole.

  That is, in order to solve the above-mentioned problem, the double collective chute of the present invention is a double collective chute for a combination weigher provided with an outer collective chute and an inner collective chute, wherein the upper collective chute and the inner collective chute are provided. The upper part of the chute has a substantially inverted frustoconical or polygonal frustum-shaped inclined surface sharing a central axis extending in the vertical direction and having different sizes, and the lower part of the inner collecting chute penetrates the outer collecting chute The lower end portion of the inner collective chute is led to the outside of the outer collective chute, and the lower end portion of the outer collective chute and the lower end portion of the inner collective chute are formed so as to surround the central axis, The range on the central angle that the lower end of the chute occupies around the central axis is the middle occupying the lower end of the inner collective chute around the central axis. Greater than the range on the corner.

  In such a configuration, the sliding distance when passing through the inner collective chute may be longer than before, or the inclination may be slightly gentler. However, the sliding distance when passing through the outer collective chute is the shortest distance that is substantially equal regardless of the position of the hopper, since the detouring distance becomes shorter. The inclination can be made steep as much as possible, and the sliding distance can be leveled as a whole. Therefore, in the double collective chute combination weigher, the measuring speed can be improved.

  In addition, penetration here includes the case where it passes through the hole formed in the outer collective chute, and the case where it passes through the notch formed in the outer collective chute. When configured in this way, the lower part of the inner collective chute comes out of the outer collective chute, but whether it is inner or outer is specified by the positional relationship at the inlet (upper end).

  In the above-described double collective chute, the lower end portion of the outer collective chute may have a larger horizontal cross-sectional area than the lower end portion of the inner collective chute.

  In such a configuration, the sliding distance when passing through the outer collective chute further reduces the detour distance. Therefore, in the double collective chute combination weigher, the measuring speed can be improved.

  In the double collective chute described above, the lower part of the outer collective chute and the lower part of the inner collective chute may include a portion having a rectangular horizontal cross section. The lower portion of the outer collective chute and the lower portion of the inner collective chute may include a portion having a triangular horizontal cross section. The lower part of the outer collective chute and the lower part of the inner collective chute may include a portion whose horizontal cross section is an ellipse. The lower part of the outer collective chute and the lower part of the inner collective chute may include a portion having a flat horizontal cross section.

  In such a configuration, it is possible to suppress the object to be weighed from spiraling at the lower end portion of the collecting chute. Therefore, in the double collective chute combination weigher, the measuring speed can be improved.

  In the double collective chute described above, the outlet of the outer collective chute and the outlet of the inner collective chute may be adjacent to each other.

  In such a configuration, since the lower ends of the outer collecting chutes are concentrated in one place, the lower structure of the collecting chutes can be simplified. In other words, since the lower ends of the inner and outer collecting chutes are gathered in one place, for example, an object to be weighed can be easily put into a single type packaging machine (one inlet). In the conventional configuration, the lower end of the outer collecting chute is divided into two parts spaced apart from each other, and it is necessary to dispose the discharging chute to collect the objects to be weighed discharged from each.

  Further, the combination weigher of the present invention includes the above-described double collective chute, a hopper that holds and discharges an object to be weighed, and an object to be weighed discharged from the hopper, an inner collective chute and an outer collective of the double collective chute And a sorting unit that alternatively puts into the chute.

  In such a configuration, the sliding distance when passing through the inner collective chute may be longer than before, or the inclination may be slightly gentler. However, the sliding distance when passing through the outer collective chute is the shortest distance that is substantially equal regardless of the position of the hopper, since the detouring distance becomes shorter. The inclination can be made steep as much as possible, and the sliding distance can be leveled as a whole. Therefore, in the double collective chute combination weigher, the measuring speed can be improved.

  The present invention has the above-described configuration and has the following effects. That is, in the double collective chute type combination weigher, the measuring speed can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
[Constitution]
FIG. 1 is a side view showing an example of the configuration of a double collective chute according to the first embodiment of the present invention. FIG. 2 is a front view showing an example of the configuration of the double collective chute according to the first embodiment of the present invention. FIG. 3 is a rear view showing an example of the configuration of the double collective chute according to the first embodiment of the present invention. FIG. 4 is a side view showing an example of the configuration of the inner collecting chute of the double collecting chute according to the first embodiment of the present invention. FIG. 5 is a front view showing an example of the configuration of the inner collective chute of the double collective chute according to the first embodiment of the present invention. FIG. 6 is a perspective view showing an example in which the lower part of the double collecting chute according to the first embodiment of the present invention is disassembled. FIG. 7 is a perspective view in which a part of the upper outer member and the upper inner portion of the double collecting chute according to the first embodiment of the present invention is removed. The left side in FIG. 1 is the forward direction of the double collective chute 100, and the right side is the rear direction of the double collective chute 100. The left side in FIG. 2 is the right direction of the double collective chute 100, and the right side is the left direction of the double collective chute 100.

  2 is a view of the double collective chute as viewed from the direction of arrow A in FIG. 1, and FIG. 3 is a view of the double collective chute as viewed from the direction of arrow A ′ in FIG. FIG. 5 is a view of the double collective chute as seen from the direction of arrow C in FIG. Hereinafter, the structure of the double assembly chute 100 of the present embodiment will be described with reference to FIGS. 1 to 7.

  As shown in FIGS. 1 to 5, the double collective chute 100 includes an outer collective chute 131 and an inner collective chute 132. The outer collective chute 131 has an outer collective chute upper portion 131A and an outer collective chute lower portion 131B. The outer collective chute upper portion 131A is composed of six upper outer members 101, and the outer collective chute lower portion 131B is composed of two lower outer members 102. The inner collective chute 132 has an inner collective chute upper portion 132A and an inner collective chute lower portion 132B. The inner collecting chute upper portion 132A is composed of six upper inner members 104, and the inner collecting chute lower portion 131B is composed of one lower inner member 105. The upper outer member 101 and the upper inner member 104 are fixed by locking means (not shown) to form an outer collective chute upper portion 131A and an inner collective chute upper portion 132A, respectively. The outer collective chute upper portion 131A and the inner collective chute upper portion 132A share a vertically extending central axis 141 (hereinafter referred to as a central axis) and have substantially reverse polygonal frustum shapes (here, inverted 18 pyramid trapezoid shapes) having different sizes. ) Slope (inner slope). When viewed from above, the inlet (upper end) of the outer collective chute upper portion 131A and the inner collective chute upper portion 132A has a substantially regular octagon shape that shares the center and is different in size. One upper outer member 101 or upper inner member 104 forms the three sides of the regular octagon, and six regular ones form one regular octagon.

  As shown in FIGS. 6 and 7, the two lower outer members 102 have a shape obtained by dividing the inverted frustoconical shape in half. An outer collective chute lower portion 131B having a truncated cone-shaped slope (inner slope) is formed.

  As shown in FIG. 6, the lower inner member 105 (the inner collecting chute lower portion 132B) has a distorted funnel-like shape. The lower portion of the lower inner member 105 (the funnel tube portion) has a substantially horizontal trapezoidal cross section when the funnel receiving portion is directed upward, and the inner surface forms a substantially vertical wall. The lower end of the lower outer member 102 and the lower end of the lower inner member 105 are located on substantially the same horizontal plane.

  As shown in FIG. 7, the lower end of the upper outer member 101 is placed inside the upper end of the lower outer member 102, and the lower end of the upper inner member 104 is placed inside the upper end of the lower inner member 105. On the other hand, the lower inner member 105 is sandwiched between the two lower outer members 102, and the lower end portion 105 a of the lower inner member 105 is guided to the outside of the outer collecting chute 131. That is, the lower inner member 105 passes through the inverted frustoconical slope formed by the two lower outer members 102, whereby the space inside the lower inner member 105 is drawn from the inside of the outer collecting chute 131 to the outside. The term “penetration” as used herein includes a case of passing through a hole formed in the outer collective chute and a case of passing through a notch formed in the outer collective chute. In such a configuration, the lower end portion 105a of the inner collective chute 132 comes out of the outer collective chute 131, but whether the collective chute is inside or outside is specified by the positional relationship at the inlet (upper end portion). The

  With this configuration, the objects to be weighed that slide down the slope inside the upper outer member 101 constituting the outer collective chute upper portion 131A are gathered by the slope inside the upper portion of the lower outer member 102 constituting the lower collective lower portion 131B. Thus, the lower outer member 102 is guided to the inner side of the lower end. On the other hand, the objects to be weighed that slide down the slope on the inner side of the upper inner member 104 constituting the inner gathering chute upper part 132A are gathered by the slope on the upper inner side of the lower inner member 105 constituting the inner gathering chute lower part 132B, The lower inner member 105 is guided to the inner side of the lower end portion 105a.

  FIG. 8 is a rear view showing an example of the lower part of the double assembly chute of FIG. For the sake of explanation, the upper outer member 101 and the upper inner member 104 are omitted. FIG. 9 is a cross-sectional view taken along the line D-D ′ of FIG. 8. FIG. 10 is a cross-sectional view taken along line E-E ′ of FIG. 8. FIG. 11 is a cross-sectional view taken along the line F-F ′ of FIG. 8. 12 is a cross-sectional view taken along line G-G ′ of FIG. In each figure, the alternate long and short dash lines indicate the front and rear axes and the left and right axes, and the intersection of both axes overlaps with the vertical central axis (the central axis 141 in FIGS. 1 to 5) at the top of the double collective chute 100. Hereinafter, a horizontal cross section of the double collective chute 100 of the present embodiment will be described with reference to FIGS.

  As described above, the upper horizontal cross section of the double collective chute 100 is concentric with the outer collective chute 131 and the inner collective chute 132. As shown in FIG. 9, the lower portion of the double collecting chute 100 is also substantially concentric at the upper end (DD ′ cross section), but the center of the lower inner member 105 is the vertical center of the middle outer member 102 as it goes downward. The axis (vertical central axis at the top of the double collecting chute 100: the central axis 141 in FIGS. 1 to 5) gradually shifts backward (upward in the figure) (FIGS. 10 and 11). The lower end portion of the lower outer member 102 and the lower end portion 105a of the lower inner member 105 are formed to have a substantially elliptical shape and a substantially trapezoidal shape on the circumference surrounding the vertical central axis in the horizontal section. That is, the lower end portion 105 a of the inner collective chute 132 is eccentric, does not include the vertical central axis (the central axis 141), and is outside the outer collective chute 131. The lower end portion of the lower outer member 102 is located on the left and right sides, and the outer peripheries thereof are closed, and none of them includes the vertical center axis. Further, the sum of the ranges on the central angle (the angles α and β in FIG. 12) occupied by the lower ends of the two lower outer members 102 constituting the outer collective chute lower portion 131B around the vertical central axis is the lower portion. The lower end portion 105a of the inner member 105 is larger than the range on the central angle around the vertical central axis (angle γ in FIG. 12), which is approximately 240 degrees and approximately 120 degrees, respectively. The total area of the horizontal cross section of the lower end portion of the lower outer member 102 is larger than the area of the horizontal cross section of the lower end portion 105 a of the lower inner member 105. As shown in FIGS. 11 to 12, the cross sections of the lower end portions of the outer collective chute 131 and the inner collective chute 132 have square portions or are flat. In addition, the cross section of the lower end part of the outer collective chute 131 and the inner collective chute 132 may be a rectangle (a trapezoid, a square, or the like), a triangle, an ellipse, or the like. Further, in the portion where the inner collective chute 132 penetrates the outer collective chute 131 (FIGS. 11 and 12), the cross section of the inner collective chute 132 cut along the conical surface (slope) of the outer collective chute 131 is the outer collective chute. A flat shape extending in the generatrix direction of the conical surface 131 is formed (see FIG. 7).

[effect]
The double collective chute of this embodiment is formed so that the lower end portion surrounds the vertical central axis. The lower end portion of the outer collective chute 131 is formed to have a larger horizontal cross-sectional area (horizontal cross-sectional area) than the lower end portion of the inner collective chute 132 and to have a larger range on the central angle around the vertical central axis. Has been. According to such a configuration, even when the route is on the outer collective chute 131 and the inner collective chute 132 needs to be involved (route dd ′ in FIGS. 8 to 12), the length of the route is the conventional configuration ( 15 to 17). Since the lower end 105a is eccentric (offset), the length of the path on the inner collecting chute 132 differs depending on the position of the input part (upper end). However, the inner collecting chute 132 is essentially closer to the central axis 141 than the outer collecting chute 131 at the input portion (upper end portion). Therefore, even if the lower end portion is eccentric, the length of the path can be formed so as to be substantially equal to that of the outer collecting chute 131. That is, in the double collective chute of the present embodiment, the sliding distance when passing the outer collective chute 131 is preferentially shortened with respect to the inner collective chute 132, so that the sliding distance is leveled as a whole. The By leveling the sliding distance, variations in sliding time are suppressed, and the time difference between the speed that reaches the packaging machine and the speed that reaches the packaging machine is shortened. Furthermore, the slope angle of the outer collective chute 131 can be maximized, and the sliding speed can be increased. With the configuration as described above, the double collective chute of the present embodiment can improve the measurement speed in the double collective chute combination weigher.

  In the conventional configuration, since the lower horizontal cross section is configured in a circular shape, the object to be weighed may spirally move as it approaches the lower end. When the object to be weighed falls into a spiral motion, the vertical drag on the slope has a vertically upward component, which causes a problem that the sliding speed becomes slow. In the double collective chute of the present embodiment, the inner collective chute 132 and the outer collective chute 131 both have a shape with a lower end or a flat shape, so that the object to be weighed does not fall into a spiral motion. As a result, the objects to be weighed can be quickly slid down and discharged from the collective chute. Therefore, in the double collective chute combination weigher, the measuring speed can be further improved.

  In the double collective chute of the present embodiment, the inner collective chute 132 and the outer collective chute 131 are accommodated in a relatively narrow region in which the respective discharge ports (lower ends) are adjacent to each other. Therefore, it is not necessary to dispose a discharge chute having a complicated shape below the collecting chute. In other words, the object to be weighed can be put into the packaging machine with a small and simple discharge chute. In addition, objects to be weighed can be easily put into a single type (single slot) packaging machine.

[Modification]
The inner collective chute and the outer collective chute may be configured with several parts as described above, or may be configured as a single unit. However, when weighing food or the like, since the chute needs to be washed, it is preferable that the chute is composed of several parts so that it can be disassembled and washed. In the case where disassembly is possible, the number of parts is arbitrary. The positional relationship between the inner collective chute and the outer collective chute is fixed by locking means (such as a hook) (not shown), but what kind of means is used is arbitrary. It should be noted that the inner collecting chute outlet and the outer collecting chute outlet (two) do not necessarily need to be in contact with each other, and may be disposed slightly apart. However, it is preferable that the respective outlets are as close as possible. The number of outlets of the outer collecting chute may not be two but may be integrated into one.

  The double collecting chute of the present embodiment is preferably used for charging the objects to be weighed into a single type packaging machine, but the shape of the discharge port is changed (the discharge port of the outer collecting chute is combined into one. Or a symmetrical shape with respect to the discharge port of the inner collecting chute, etc.), and may be used for charging an object to be weighed into a twin type (two input ports) packaging machine. Even in such a case, the lower end portion is formed so as to surround the vertical central axis, the outer collective chute is larger in area than the inner collective chute, and the range on the central angle that occupies around the vertical central axis is larger. By doing so, the measurement speed can be improved.

(Second Embodiment)
The second embodiment is a combination weigher using the double assembly chute of the first embodiment.

[Constitution]
FIG. 13: is a side view which shows the outline of an example of the combination weigher of 2nd Embodiment of this invention. FIG. 14 is a perspective view showing a schematic configuration of a collective hopper used in the combination weigher of the second embodiment of the present invention. In the combination weigher of this embodiment, the portion of the double collective chute is the same as that of the double collective chute of the first embodiment, so the same reference numerals and names are used and description thereof is omitted. 13 is the vertical center axis of the combination weigher 150, and a direction toward the vertical center axis is referred to as an inner side, and a direction away from the vertical center axis is referred to as an outer side. Further, the double collective chute 100 is arranged so that the central axis thereof coincides with the central axis 151 of the combination weigher 150.

  As shown in FIG. 13, the combination weigher 150 of this embodiment includes a supply port 111, a dispersion feeder 112, a plurality of rectilinear feeders 113, a plurality of supply hoppers 114, a plurality of weighing hoppers 115, and a double set A chute 100, an inner collecting hopper 116, a first outer collecting hopper 118, a second outer collecting hopper 120, and legs 122 are provided.

  Although not shown, the combination weigher 150 includes a housing (center column) provided with a weighing sensor, a control device, and the like inside the supply hopper 114 and the weighing hopper 115. The casing is supported by a leg 120 protruding from a gap between the upper outer members 101 and a support member (not shown) connected to the leg 120, and is placed on the floor, for example.

  The supply port 111 has an opening at the upper end, receives an object to be weighed from a supply trough (not shown) above, and supplies it to the dispersion feeder 112 arranged below the supply port 111. The dispersion feeder 112 has a flat conical shape, and the objects to be weighed are dispersed radially outward by vibration using an electromagnet or the like, to each of the rectilinear feeders 113 arranged on the circumference outside the dispersion feeder 112. And supply. The rectilinear feeder 113 has a shape like a long and thin ridge, and transports an object to be weighed received from the dispersion feeder further outward by vibration using an electromagnet or the like. It supplies to the supply hopper 114 arrange | positioned above. The amount of objects to be weighed (amount per hour) supplied (discharged) by the dispersion feeder 112 and the linear feeder 113 is controlled by a control device (not shown).

  The supply hopper 114 has two gates and opens and closes the gates to hold the object to be weighed received from the linear feeder 113, and below the supply hopper 114 at a predetermined timing based on the control of the control device. The object to be weighed is discharged to the weighing hopper 115 arranged on the circumference.

  The weighing hopper 115 is provided with two gates (an inner gate and an outer gate) at the inner lower end and the outer lower end, and a matching portion (valley line) of the gates is disposed above the upper end of the inner collecting chute 132. ing. The weighing hopper 115 is supported by a weight sensor (load cell or the like) (not shown). The weight of an object to be weighed in the weighing hopper 115 is detected by the weight sensor, and a combination calculation is performed by the control device. Well-known methods can be used for weight detection and combination calculation. The weighing hopper 115 selectively opens the two gates based on the control of the control device, and discharges the object to be weighed held inside. That is, if the inner gate is opened, the inner collecting chute 132 (inside the upper end of the upper inner member 104) disposed below the weighing hopper 115 is opened, and if the outer gate is opened, the outer disposed on the outer lower side of the weighing hopper 115. The object to be weighed is alternatively discharged to the collecting chute 131 (inside the upper end of the upper outer member 101).

  As shown in FIG. 14, the collecting hopper includes an inner collecting hopper 116 (timing hopper), a first outer collecting hopper 118 (timing hopper), and a second outer collecting hopper 120 (timing hopper), The hoppers are arranged side by side on the circumference so as to occupy 120 degrees around the vertical center axis when viewed from above.

  The lower end of the lower inner member 105 is fitted into the upper end of the inner collecting hopper 116. The objects to be weighed discharged to the inner collecting chute 132 are discharged to the inner collecting hopper 116 through the upper inner member 104 and the lower inner member 105.

  The lower end of the left lower outer member 102 is fitted into the upper end of the first outer collecting hopper 118. The lower end of the right lower outer member 102 is fitted into the upper end of the second outer collective hopper 120 (timing hopper). The objects to be weighed discharged to the outer collecting chute 131 are discharged to the first outer collecting hopper 118 and the second outer collecting hopper 120 through the upper outer member 101 and the lower outer member 102.

  The inner collecting hopper 116 includes a single gate 117. The inner collecting hopper 116 holds and discharges the objects to be weighed by opening and closing the gate 117 by a control device (not shown). The first outer collecting hopper 118 includes a single gate 119. The outer collecting hopper 118 holds and discharges the objects to be weighed by opening and closing the gate 119 by a control device (not shown). The second outer collecting hopper 120 includes a single gate 121. The second outer collecting hopper 120 holds and discharges the objects to be weighed by opening and closing the gate 121 by a control device (not shown). Since the gate 117 and the gate 119 open outward with respect to the vertical center axis, they do not collide with each other.

  The objects to be weighed discharged from the inner collecting hopper 116 or the outer collecting hopper 118 are guided to a packaging machine (not shown). As the combination weigher of the present embodiment, a so-called single type packaging machine having a single inlet is preferably used. When the gate 117 is opened, the objects to be weighed held by the inner collecting hopper 116 are put into the packaging machine. When the gate 119 and the gate 121 are opened, the objects to be weighed held by the first outer collecting hopper 118 and the second outer collecting hopper 120 are put into the packaging machine. By alternately opening and closing the gate 117 and the gates 119 and 121, a substantially constant amount of objects to be weighed are discharged to the packaging machine at a high speed.

[effect]
Since the combination weigher of this embodiment includes the double assembly chute 100 of the first embodiment, the same effects as those of the first embodiment are achieved. That is, in the double collective chute type combination weigher, the measuring speed can be improved. In addition, a discharge chute having a complicated shape is not required, and the object to be weighed can be put into the packaging machine with a small and simple discharge chute.

  Since the combination weigher of the present embodiment is provided with the collecting hopper, the distance (time difference) between the top and the end of the objects to be weighed discharged from the combination weigher can be shortened. Therefore, high-speed weighing and high-speed packaging are possible by interlocking with a high-speed packaging machine.

[Modification]
Also in this embodiment, the same modification as the first embodiment is possible.

  The means for selectively discharging the objects to be weighed in the hopper to the inner collective chute or the outer collective chute (sorting means) is not limited to one that adjusts by opening either the inner or outer gate. There is no particular limitation. For example, a device (diverter) that changes the discharge direction by changing the angle of the cylindrical flow path may be used.

  The combination weighing method may be single shift or double shift. At the same time, the objects to be weighed may be discharged to two systems (inside and outside), or the objects to be weighed may be discharged to each system (inside and outside) alternately.

  The double collective chute and the combination scale according to the present invention are useful as a double collective chute and a combination scale capable of improving the measuring speed in the double collective chute type combination scale.

It is a side view showing an example of composition of a double gathering chute concerning a 1st embodiment of the present invention. It is a front view which shows an example of a structure of the double assembly chute | shoot concerning 1st Embodiment of this invention. It is a rear view which shows an example of a structure of the double assembly chute | shoot concerning 1st Embodiment of this invention. It is a side view showing an example of composition of an inner gathering chute of a double gathering chute concerning a 1st embodiment of the present invention. It is a front view showing an example of composition of an inner gathering chute of a double gathering chute concerning a 1st embodiment of the present invention. It is a perspective view which shows an example which decomposed | disassembled the lower part of the double assembly chute | shoot concerning 1st Embodiment of this invention. It is the perspective view which removed a part of upper outside member and upper inside part of a double gathering chute concerning a 1st embodiment of the present invention. It is a rear view which shows an example of the lower part of the double assembly chute | shoot of 1st Embodiment of this invention. It is sectional drawing along the D-D 'line of FIG. It is sectional drawing along the E-E 'line of FIG. It is sectional drawing along the F-F 'line | wire of FIG. It is sectional drawing along the G-G 'line of FIG. It is a side view which shows the outline of an example of the combination weigher of 2nd Embodiment of this invention. It is a perspective view which shows schematic structure of the collection hopper used for the combination weigher of 2nd Embodiment of this invention. It is a figure which shows the structure of the double assembly chute disclosed by patent document 1. FIG. It is a front view of the double gathering chute disclosed by patent document 2 and patent document 3. FIG. It is a side view of the double assembly chute disclosed in Patent Document 2 and Patent Document 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Double collective chute 101 Upper outer member 102 Lower outer member 104 Upper inner member 105 Lower inner member 105a Lower end portion of inner collective chute 111 Supply port 112 Dispersion feeder 113 Linear feeder 114 Supply hopper 115 Weighing hopper 116 Inner collective hopper 117 Gate 118 1st outer collecting hopper 119 gate 120 second outer collecting hopper 121 gate 122 leg 131 outer collecting chute 131A outer collecting chute upper part 131B outer collecting chute lower part 132 inner collecting chute 132A inner collecting chute upper part 132B inner collecting chute lower part Part 141 Central axis 151 Central axis 150 Combination weigher 200 Double collective chute 201 Inner collective chute 202 Outer collective chute 203 Discharge port 204 Discharge port 210 Double collect Shoot 211 first primary outer collection chutes 212 second primary outer collection chutes 213 secondary outer collection chutes 214 primary inner collecting chute 215 secondary inner collecting chute 216 outlet 217 outlet

Claims (8)

A double collective chute for a combination weigher with an outer collective chute and an inner collective chute,
The upper portion of the outer collective chute and the upper portion of the inner collective chute share a central axis extending in the vertical direction and have substantially inverted truncated cone or substantially polygonal frustum-shaped inclined surfaces having different sizes from each other,
The lower end portion of the inner collective chute is led to the outside of the outer collective chute by allowing the lower part of the inner collective chute to penetrate the outer collective chute,
The lower end portion of the outer collective chute and the lower end portion of the inner collective chute are formed so as to surround the central axis,
A double collective chute in which the lower end of the outer collective chute occupies the central angle around the central axis is larger than the upper central range of the lower end of the inner collective chute around the central axis.   The double collective chute according to claim 1, wherein a lower end portion of the outer collective chute has a larger horizontal cross-sectional area than a lower end portion of the inner collective chute.   The double collective chute according to claim 1, wherein a lower portion of the outer collective chute and a lower portion of the inner collective chute are provided with a portion having a rectangular horizontal cross section.   The double collective chute according to claim 1, wherein a lower portion of the outer collective chute and a lower portion of the inner collective chute are provided with portions having a horizontal cross section of a triangle.   The double collective chute according to claim 1, wherein a lower part of the outer collective chute and a lower part of the inner collective chute are provided with portions having a horizontal cross section of an ellipse.   The double collective chute according to claim 1, wherein a lower portion of the outer collective chute and a lower portion of the inner collective chute have portions having a flat horizontal cross section.   The double collecting chute according to claim 1, wherein the outer collecting chute outlet and the inner collecting chute outlet are adjacent to each other. A double assembly chute according to claim 1;
A hopper for holding and discharging the object to be weighed;
A combination weigher comprising: sorting means for selectively feeding the objects to be weighed discharged from the hopper into the inner and outer collecting chutes of the double collecting chutes.

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