JP2022053175A - Combination weighing device - Google Patents

Abstract

To improve the efficiency of supplying weighing objects to a weighing unit.SOLUTION: A combination weighing device 1 comprises: a supply conveyor 3 which has two parallel conveyance belts B1, B2 rotating in mutually opposite conveyance directions D1, D2, and reciprocates along a movement direction F corresponding to the conveyance direction D; a plurality of conveyance units 13 juxtaposed along the movement direction F below the supply conveyor; and a plurality of weighing units 14 provided below the plurality of conveyance units. The combination weighing device, while moving the supply conveyor in the movement direction F, rotates the conveyance belts B1, B2 in the conveyance directions D1, D2 so as to constantly drop weighing objects from both ends of the supply conveyor. The combination weighing device can supply the weighing objects to the conveyance units one after another so as to efficiently supply the weighing objects to each weighing unit. Thereby, efficiency of weighing the weighing objects at each weighing unit, and efficiency of combination weighing by a combination of weighing results in each weighing unit, are improved.SELECTED DRAWING: Figure 1

Description

In the present invention, the weight of the object to be weighed is measured by a plurality of measuring units, and the object to be weighed is discharged from the measuring unit in a combination such that the total of the objects to be weighed becomes the target weight to obtain the object to be weighed. In relation to the combination weighing device, in particular, by supplying the object to be weighed by two parallel transport belts that rotate in opposite directions, the supply of the object to be weighed to the weighing part is streamlined for rapid weighing and prompt weighing. It relates to a combination weighing device that realizes discharge.

The following Patent Document 1 discloses an invention of a combination weighing device. This combination weighing device includes an automatic supply conveyor using one transport belt as a transport means. The transport belt is rotatable in both directions, and the automatic supply conveyor can reciprocate as a whole along a movement direction that coincides with the longitudinal direction of the transport belt. The object to be loaded on the automatic supply conveyor is dropped from one end or the other end of the rotating conveyor belt, and the dropping position can be changed by moving along the moving direction. Below the automatic supply conveyor, a plurality of feed conveyors that receive and convey the dropped objects to be weighed along the moving direction of the automatic supply conveyor, and a plurality of feed conveyors to which the objects to be conveyed carried by each feed conveyor are input. A combined weighing unit provided with a measuring unit is provided. The automatic supply conveyor drops the object to be measured from the transport belt onto each feed conveyor while moving in the moving direction, and each feed conveyor loads the object to be measured into each measurement unit of the combined measurement unit. The objects to be weighed held by each weighing unit of the combination weighing unit are discharged from each measuring unit in a combination such that the total of the objects to be weighed becomes the target weight, and are collected to obtain the object to be weighed to have the target weight. can.

Japanese Unexamined Patent Publication No. 2013-156072

According to the combination weighing device described in Patent Document 1, since the transport belt of the automatic supply conveyor can rotate in both directions, the object to be weighed can be dropped and supplied from either one end side or the other end side. .. However, when the conveyor belt is moved in one direction and the object to be weighed is dropped from one end side, it is necessary to invert the conveyor belt in the other direction and drop it from the other end side. Since there is no object to be weighed from the center to the other end of the conveyor belt to which the object to be weighed is supplied, the conveyor belt is inverted in the other direction until the object to be weighed reaches the other end. There is a problem that the efficiency of supply to the measuring unit is not good because it is not possible to drop an object and supply it, and it takes a wasteful waiting time.

The present invention has been made in view of the problems in the prior art described above, and the rotation direction of the conveyor belt of the automatic supply conveyor provided in the combination weighing device is reversed so that the object to be weighed is placed on the opposite end. The purpose is to eliminate the waste of waiting time that occurs when supplying from the unit and to improve the efficiency when supplying the object to be measured to the measuring unit.

The combination weighing device 1, 100 according to claim 1 is
A supply conveyor 3 that rotates in the transport direction D to drop the object to be weighed W from the end in the longitudinal direction and reciprocates along the movement direction F corresponding to the transport direction D.
A plurality of transporting units 13 arranged below the supply conveyor 3 along the moving direction F and transporting the objects to be weighed W dropped from the supply conveyor 3.
It has a plurality of measuring units 14 provided below the plurality of transporting units 13, and discharges the object to be weighed W conveyed to the measuring unit 14 by the transporting unit 13 in a combination so as to have a predetermined mass. Combination measuring unit 15 and
In the combination weighing device 1,100 equipped with
The supply conveyor 3 is characterized by having two parallel conveyor belts B1 and B2 that rotate in opposite transport directions D1 and D2.

The combination weighing device 1, 100 according to claim 2 is the combination weighing device 1, 100 according to claim 1.
Having a storage body 6 that stores the supply conveyor 3 and reciprocates with the supply conveyor 3 along the movement direction F to hold the supplied object W on the transfer belts B1 and B2. It is a feature.

The combination weighing device 1, 100 according to claim 3 is the combination weighing device 1, 100 according to claim 2.
It is characterized by having coverings 11 and 21 provided above the gap between the two transport belts B1 and B2.

The combination weighing device 1, 100 according to claim 4 is the combination weighing device 1, 100 according to claim 2 or 3.
A plurality of charging units 12 provided between the storage body 6 and the plurality of transporting units 13 to charge the object to be weighed W dropped from the supply conveyor 3 into the transporting unit 13.
An actuating body 20 provided on the lower side of the storage body 6 that comes into contact with the charging unit 12 and drops the object to be weighed W dropped from the supply conveyor 3 onto the charging unit 12 as the storage body 6 reciprocates. When,
It is characterized by having.

The combination weighing device 1, 100 according to claim 5 is the combination measuring device 1, 100 according to any one of claims 1 to 4.
Corresponds to the first weighing group G1 composed of the predetermined number of the transporting portions 13 and the measuring portions 14 corresponding to the vertical direction continuously arranged in the moving direction F, and the vertical direction continuously arranged in the moving direction F. A second weighing group G2 including the transporting unit 13 and the measuring unit 14 is arranged side by side in the moving direction F.
The supply conveyor 3 has two conveyors 13 and 13 at positions corresponding to the moving direction F in the two weighing groups G1 and G2, one end of the first conveyor belt B1 and a first one. While moving the operation of loading the object to be weighed W from the other end of the second conveyor belt B2, which is opposite to the one end of the conveyor belt B1 with respect to the moving direction, in the moving direction F. It is characterized by doing.

According to the combination weighing device according to claim 1, while supplying the object to be weighed onto the supply conveyor from the outside of the device, the supply conveyor is moved in the moving direction parallel to the longitudinal direction, and the two are arranged in parallel. The conveyor belts of the book can be rotated in opposite transport directions so that the object to be weighed can be constantly dropped from both one end of one conveyor belt and the other end of the other conveyor belt. As a result, the objects to be measured can be supplied one after another to a plurality of transport units arranged below the supply conveyor along the moving direction without interruption. Therefore, the object to be measured can be efficiently supplied to each measurement unit of the combination measurement unit, and the efficiency of the combination measurement by the combination of the measurement of the object to be measured in each measurement unit and the measurement result in each measurement unit is improved.

According to the combination weighing device according to claim 2, when the weighted object is supplied from the outside of the device onto the two transport belts inside the storage body, the weighted object is surrounded by the storage body. Therefore, even if the two transport belts are rotated in opposite transport directions, the object to be weighed does not spill out of the transport belts and is transported to the end of each transport belt and falls. Therefore, the entire amount of the supplied object to be weighed can be supplied to the transport unit without waste.

According to the combination weighing device according to claim 3, the object to be weighed supplied on the two transport belts from the outside of the device is a covering body provided above the gap between the two transport belts. Therefore, it does not get into the gap between the two transport belts. Therefore, it is possible to prevent problems such as the object to be weighed entering the gap between the two conveyor belts and stopping the rotation of the conveyor belt, or the object to be weighed being not conveyed and wasted.

According to the combination weighing device according to claim 4, the object to be weighed supplied on the two transport belts from the outside of the device is stored away from the end thereof as the transport belts rotate. It falls below the body, enters the loading section, and is supplied to the transport section via the loading section. Even if a part of the object to be weighed does not enter the loading section and stays at the entrance of the loading section, the actuator provided in the loading section moves as the storage body containing the supply conveyor reciprocates. Since it reciprocates in contact with the container, the object to be weighed staying at the inlet of the loading section is pushed by the working body and dropped into the loading section. That is, the object to be weighed that has fallen from the supply conveyor is supplied to the transport unit without waste and is used for combined weighing.

In the combined weighing device according to claim 5, while supplying an object to be weighed onto two conveyor belts from the outside of the apparatus, the two conveyor belts are rotated in opposite transport directions. When the supply conveyor is moved in the moving direction, one end of the first conveyor belt and the other of the second conveyor belt are added to the two conveyors at the positions corresponding to the moving directions in the first weighing group and the second weighing group. The objects to be weighed are loaded from the ends. Since the supply conveyor is moving in the moving direction, the two transporting units into which the objects to be weighed are sequentially moved in the moving direction in the first weighing group and the second weighing group. That is, the objects to be weighed are sequentially charged into the transport section of the first weighing group and the transport section of the second weighing group along the moving direction. When the supply conveyor moves in one direction and moves from the position of one end to the position of the other end in the moving direction, the moving direction of the supply conveyor is reversed and moved from the position of the other end in the moving direction to the position of the other end. Similarly, the objects to be weighed are dropped and the objects to be weighed are sequentially charged into the transport section of the first weighing group and the transport section of the second weighing group. In this way, by reciprocating the supply conveyor in the moving direction while rotating the two parallel transport belts in the opposite transport directions, the first weighing group and the second weighing group are repeatedly and continuously moved. Since the object to be weighed can be efficiently supplied, the efficiency of the combined weighing by the combination of the weighing of the object to be measured in each measuring section and the weighing result in each measuring section is improved.

Further, according to the combination weighing device according to claim 5, it is also possible to weigh two types of objects to be weighed, combine them so as to have a predetermined weight, and discharge them. In this case, the first transport belt and the first weighing group are used for the first weighted object, and the second transport belt and the second weighing group are used for the second weighted object. do. Then, the first object to be weighed is supplied on the first conveyor belt, the second object to be weighed is supplied on the second conveyor belt, and both conveyor belts are transferred in opposite directions. While rotating, the supply conveyor is moved in the moving direction. The first object to be weighed is loaded from one end of the first transport belt into the two transport portions located at the positions corresponding to each other in the moving direction in the first weighing group and the second weighing group, and the second transport belt has a second transport belt. The second object to be weighed is charged from the other end. In this way, while rotating two parallel transport belts in opposite transport directions, different types of objects to be measured are supplied to each transport belt, and the supply conveyor is reciprocated in the moving direction. Different types of objects to be weighed are efficiently supplied to the first weighing group and the second weighing group, and each weighing object is discharged in a combination such that the total of the two types of objects is a predetermined weight. Combined weighing can be performed efficiently.

It is a front view of the combination weighing apparatus of 1st Embodiment. It is a right side view of the combination weighing apparatus of 1st Embodiment. It is a top view of the automatic supply part, the input part, and the transfer part in the combination weighing apparatus of 1st Embodiment. It is a front view of the automatic supply part, the input part, and the transport part in the combination weighing apparatus of 1st Embodiment, and is the figure which shows the procedure at the time of combination weighing of two kinds of objects to be weighed. It is a right side view of the combination weighing apparatus of 2nd Embodiment.

The configuration of the combination weighing device 1 of the first embodiment will be described with reference to FIGS. 1 to 4.
The combination weighing device 1 efficiently weighs two types of objects to be weighed W (first to be weighed W1 and second to be weighed W2), respectively, and weighed the first to be weighed and the second to be weighed. It is possible to automatically and efficiently perform the work of combinatorial weighing in which the total mass of the objects W2 is combined and discharged so as to have a predetermined value. In the figure, the object to be weighed W is shown with diagonal lines.

1 to 4 show the main body of the combined weighing device 1, and FIG. 2 is provided above the combined weighing device 1 together with the combined weighing device 1, and the object to be weighed W is attached to the combined weighing device 1. Also shown are the loading conveyors C (C1, C2) that drop and supply. Although not shown, a discharge chute for discharging the measured object W discharged in combination and a transport device for transporting the measured object W discharged from the discharge chute are provided on the lower side of the combination weighing device 1. These configurations will be described later.

The combination weighing device 1 includes a supply unit 2 that can drop the object to be weighed W from the end of the belt-type transport means and efficiently and automatically supply the object to be weighed to the lower weighing means. As shown in FIGS. 1 to 3, the supply unit 2 includes a supply conveyor 3 as a means for transporting the object to be weighed W. Then, as shown in FIG. 3, the supply conveyor 3 has two parallel conveyor belts B (first conveyor belt B1) that rotate in opposite transport directions D (first transport direction D1 and second transport direction D2). And a second conveyor belt B2) is provided. In the present embodiment, the first transfer belt B1 supplies the first object to be weighed W1, and the second transfer belt B2 supplies the second object to be weighed W2.

Here, the meaning that the two transport belts B are in parallel will be described.
"Parallel" means that the two transport belts B are at the same height, horizontal, and at different positions adjacent to each other in the depth direction, and the length of the transport belt B in the left-right direction in FIG. With respect to the transport direction D that coincides with the direction, it means that at least a part of the transport direction D is arranged at the overlapping position. However, with respect to the transport direction D of the transport belt B, it is sufficient that at least a part of the transport belt B is arranged at an overlapping position. The two transport belts B may be in the same position, and in that case, the two transport belts B overlap each other in the depth direction, and if there is no storage body 6 described later, only one first transport belt B1 in front can be seen. Further, the two transport belts B may be arranged so that they overlap each other in half with respect to the transport direction D. In that case, in FIG. 1, if there is no storage body 6 described later, the entire first transport belt B1 on the front side can be seen, and half of the second transport belt B2 on the back side is from the first transport belt B1 on the front side. It will appear to stick out. Since the first transport belt B1 and the second transport belt B2 are arranged in parallel in the above sense and rotate in opposite directions, there is a slight gap in the width direction so as not to hinder the movement. Must be placed separately.

On the other hand, if the two transport belts B do not overlap at all in the transport direction D, it cannot be said that the two transport belts B are in parallel. For example, if the two transport belts B have the same height and are located at different positions horizontally and in the depth direction, but do not overlap at all with respect to the transport direction D of the transport belts B, the two transport belts B Are not in parallel. In this case, in FIG. 1, if there is no storage body 6 described later, the two transport belts B are lined up in the transport direction D, and both of them can be seen as a whole. Further, although the two transport belts B are horizontally arranged at the same height, they are at the same position in the depth direction and are adjacent to each other in a straight line with respect to the transport direction D without overlapping. Even in this case, the two transport belts B are not in parallel. Also in this case, in FIG. 1, if there is no storage body 6 described later, the two transport belts B are lined up at the same position in the depth direction along the transport direction D, and both of them can be seen as a whole.

Next, a mechanism in which two parallel transport belts B rotate in opposite directions will be described.
As shown in FIG. 1, the two transport belts B are hung around the two rollers 4 and 5. The two rollers 4 and 5 are arranged horizontally at the same height as shown in FIG. 1 with a predetermined interval in the transport direction D, with the depth direction perpendicular to the paper surface of FIG. 1 as the axial direction. There is. Each of the rollers 4 and 5 is composed of two independently rotatable partial rollers that are bisected in the axial direction.

If the partial roller on the front side of the first roller 4 on the left side when viewed from the front side (FIG. 1) is the first drive roller driven by the first motor, the second roller on the right side. The partial roller on the front side of the roller 5 is the first driven roller paired with the first drive roller. The first conveyor belt B1 shown on the lower side in FIG. 3 is rotated by the first drive roller and the first driven roller on the lower side in FIG. 3 of the two rollers 4 and 5, respectively, from right to left in the figure. The first object to be weighed W1 is conveyed in the first conveying direction D1 toward which the object to be weighed W1 is conveyed, and the first object to be weighed W1 is dropped from one end of the supply conveyor 3 (the left end in FIG. 3).

Further, if the partial roller on the back side of the second roller 5 on the right side when viewed from the front side (FIG. 1) is the second drive roller driven by the second motor, the first roller on the left side. The roller on the back side of the roller 4 is the second driven roller paired with the second drive roller. The second conveyor belt B2 shown on the upper side in FIG. 3 is rotated by the second drive roller and the second driven roller on the upper side in FIG. 3 of the two rollers 5 and 4, respectively, and is a second roller from left to right in the figure. 2 The second object to be weighed W2 is conveyed in the transfer direction D2, and the second object to be weighed W2 is dropped from the other end of the supply conveyor 3 (the right end in FIG. 3).

As shown in FIGS. 1 to 3, the supply unit 2 includes a storage body 6 which is a rectangular parallelepiped box body for storing the supply conveyor 3. The longitudinal dimension of the storage body 6 is larger than the longitudinal dimension of the supply conveyor 3, and the internal dimension of the storage body 6 in the lateral direction substantially coincides with the lateral dimension of the supply conveyor 3. The supply conveyor 3 is a storage body so that a gap is created between one end and the other end of the transport direction D of the supply conveyor 3 and the inner surfaces of both ends in the longitudinal direction of the storage body 6 so that the object to be weighed W falls. It is attached to 6. The upper surface of the storage body 6 has an upper opening 6a having the same shape as the outer shape, so that the object to be weighed W can be loaded onto the supply conveyor 3 from the loading conveyor C, which will be described later. On the lower surface of the housing body 6, a lower opening 6b through which the object to be weighed W dropped from the one end and the other end of the supply conveyor 3 passes is provided at least at a position corresponding to one end and the other end of the supply conveyor 3. Has been done.

As shown in FIG. 2, the entire supply unit 2 including the supply conveyor 3 and the accommodating body 6 is horizontally supported on the upper part of the frame 7 of the combination weighing device 1, and this is supported in the longitudinal direction of the supply conveyor 3 (that is, transport). A drive mechanism 8 for reciprocating and moving along a moving direction F that coincides with the direction D) is provided. The drive mechanism 8 has a guide means 9 that supports the storage body 6 so as to be reciprocally movable along the movement direction F, and a storage body 6 that is guided by the guidance means 9 and is reciprocally movable in the movement direction F. The connected moving body 10, a driving means (motor or the like) (not shown) that moves the moving body 10 along the guiding means 9, and a driving force of the driving means are transmitted to the moving body 10 to move along the guiding means 9. It is provided with a transmission mechanism (a pinion attached to the driving means, a rack provided on the guide means 9 side and meshing with the pinion, etc.). By driving this drive mechanism 8, the supply unit 2 can be moved in the moving direction F, so that the objects to be weighed W falling from the end of the supply conveyor 3 are arranged in the moving direction F, which will be described later. It can be supplied to each of the channel CH including the measuring unit 14 and the measuring unit 14. The operation of the combination weighing of the first object to be weighed W1 and the second object to be weighed W2 will be described in detail later.

As shown in FIGS. 1 to 3, the accommodating body 6 of the supply unit 2 is provided with a covering body 11 above the gap between the two transport belts B. The covering body 11 is an oblong member parallel to the longitudinal direction of the supply conveyor 3, and as shown in FIG. 2, the cross section orthogonal to the longitudinal direction is a triangle with an upper tip as a tip, and the height thereof is the transport belt B. It is larger than half of the distance between the surface of the container 6 and the upper opening 6a of the housing body 6. By providing the covering body 11 above the gap between the two transport belts B, problems such as the object W being caught in the gap between the two transport belts B and the rotation of the transport belt B being hindered are prevented. Will be done. Further, it is possible to prevent a problem that the first object to be weighed W1 supplied on the first transfer belt B1 and the second object to be weighed W2 supplied on the second transfer belt B2 are mixed.

As shown in FIG. 2, two input conveyors C (first input conveyor C1 and second input conveyor C2) are provided above the supply unit 2. These two loading conveyors C are located at the center of the length (width) of the combination weighing device 1 with respect to the direction perpendicular to the paper surface of FIG. 2, that is, the moving direction F of the supply conveyor 3, (at the center line L in FIGS. 1 and 3). In (shown), the transport direction is horizontally provided so as to be orthogonal to the transport direction D and the moving direction F of the supply conveyor 3. The first loading conveyor C1 is at a relatively high position, and the first object to be weighed W1 is dropped at the center of the first conveyor belt B1 of the supply conveyor 3 arranged at the center position in the moving direction F. Further, the second loading conveyor C2 is located at a relatively low position, and the second object to be weighed W2 is dropped at the center of the second transport belt B2 of the supply conveyor 3 arranged at the center position in the moving direction F.

As shown in FIGS. 1 and 2, a sensor S (first sensor) for detecting whether or not a predetermined amount of the object to be weighed W is present on the supply conveyor 3 at the upper end of the frame 7 of the combination weighing device 1 (first sensor). S1 and the second sensor S2) are attached. These two sensors S are provided at the center position in the length (width) of the combination weighing device 1 described above. When the supply conveyor 3 is arranged at the center position, the first sensor S1 is attached so as to face the center of the first conveyor belt B1 and detects the first object to be weighed W1 at the center position. Further, when the supply conveyor 3 is arranged at the center position, the second sensor S2 is attached so as to face the center of the second conveyor belt B2, and detects the second object to be weighed W2 at the center position. do. When the first sensor S1 and the second sensor S2 do not detect a predetermined amount of the first weighted object W1 and the second weighted object W2, the first loading conveyor C1 and the second loading conveyor C2 are driven, respectively. The driving of the first loading conveyor C1 and the second loading conveyor C2 is continued until the first sensor S1 and the second sensor S2 detect a predetermined amount of the first weighted object W1 and the second weighted object W2, respectively. ..

As shown in FIGS. 1 to 3, a plurality of input units 12 are provided immediately below the storage body 6 of the supply unit 2 along the moving direction F of the supply unit 2. In the present embodiment, two sets of five charging units 12 arranged along the moving direction F are provided at predetermined intervals, and a total of ten charging units 12 are arranged. The charging section 12 is a substantially square tubular member for receiving the object to be weighed W dropped from the supply conveyor 3 and guiding it to a transport section provided below thereof, which will be described later. The loading section 12 includes an upper portion 12a having an loading port whose inner diameter expands upward and in the moving direction F, and a lower portion 12b having a rectangular tubular discharge port provided in communication with the lower portion of the loading port. .. Further, due to the shape of the upper portion 12a in which the inner diameter of the input port expands upward, the boundary between the adjacent upper portion 12a and the upper portion 12a is a mountain shape pointed upward as can be seen from FIGS. 1 and 3. The object to be weighed W that has fallen to the portion falls into either the left or right input portion 12 of the boundary. Further, as shown in FIG. 3, the dimension of the charging unit 12 in the depth direction (vertical direction in FIG. 3) orthogonal to the transport direction D is slightly larger than the dimension of the supply unit 2 in the same direction, and the supply unit 2 has. Since it is arranged substantially in the center of the charging unit 12 in the depth direction, a part of the front and rear parts of the charging unit 12 in the depth direction slightly protrudes forward and backward from the supply unit 2.

As shown in FIGS. 1 and 2, activators 20 are provided below both ends of the storage body 6 in the moving direction F. The working body 20 is an elastic plate-shaped member, and is specifically made of a resin sheet or the like. As shown in FIG. 1, the two working bodies 20 are attached to the housing body 6 at an inclination angle such that the lower ends thereof are close to each other. Further, the lower end of the working body 20 is close to or in contact with the charging port of the charging unit 12 described above with a small distance. Therefore, even if the object to be weighed W that has fallen from the supply unit 2 is caught on the boundary between the charging unit 12 and the charging unit 12 and does not fall to either the left or right loading unit 12, the storage body 6 of the supply unit 2 Since the working body 20 rubs the charging port of the charging unit 12 with the reciprocating movement of the object W, the object to be weighed W is pushed by the working body 20 and falls to the charging unit 12 on the side of the moving direction F.

As shown in FIG. 2, two input unit confirmation sensors SC are attached to the front side of the storage body 6 in which the supply conveyor 3 is housed. Each loading unit confirmation sensor SC has a loading port of the upper portion 12a of the loading section 12 into which the first weighted object W1 dropped from the first transport belt B1 is loaded, and a second weighted object dropped from the second transport belt B2. The insertion port of the upper portion 12a of the insertion unit 12 into which W2 is input is monitored. These loading unit confirmation sensors SC reciprocate together with the supply conveyor 3, detect the presence or absence of the weighted object W inside the loading unit 12, and determine that there is no weighted object W in the loading unit 12. In this case, the conveyor belt B is operated to supply the object to be weighed W to the loading section 12, but if it is determined that the loading section 12 contains a predetermined amount of the object to be weighed W, the conveyor belt B is stopped. , The supply of the object to be weighed W to the input unit 12 is stopped.

As shown in FIGS. 1 to 3, a plurality of transport units 13 are provided along the movement direction F immediately below the plurality of input units 12 arranged along the movement direction F. In the present embodiment, two sets of five transport units 13 arranged along the moving direction F are provided at predetermined intervals, and a total of ten transport units 13 are arranged. The set of the charging section 12 and the set of the transport section 13 correspond to each other, and the individual loading section 12 and the transport section 13 correspond to each other in each set. As shown in FIGS. 2 and 3, the transport unit 13 is the tip of the front side (left side in FIG. 2 and the lower side in FIG. 3) of the combination weighing device 1 in which the object to be weighed W loaded from the loading unit 12 is combined. It is conveyed to the unit and supplied to the corresponding measuring unit 14 of the combined measuring unit 15 below the tip portion. The principle of transport in the transport unit 13 is not limited, but a belt feeder that supplies the object to be measured W with a rotating belt can be used.

As shown in FIGS. 1 and 2, directly below the tip of the transport unit 13 arranged along the moving direction F, a combination measuring unit composed of a plurality of measuring units 14 arranged along the moving direction F. 15 is provided. In the present embodiment, two sets of five measuring units 14 arranged along the moving direction F are provided along the moving direction F, and correspond to the two sets of the conveying unit 13.

As shown in FIGS. 1 and 2, each measuring unit 14 constituting the combined measuring unit 15 is an uppermost pool cup that stores an unmeasured object W that has been conveyed and loaded from the corresponding transport unit 13. It has a measuring cup 17 in a middle stage provided with a measuring means 16 and a memory cup 18 in a lower stage for temporarily storing a measuring object W after weighing. Each of these cups is hollow and has an opening at the top and bottom, and a shutter is provided at the lower part of the opening, and the object to be weighed W can be dropped and discharged to the lower cup by the opening / closing operation of the shutter. If the combination of the memory cups 18 is selected so that the total of the objects to be weighed W becomes the target weight, and the objects W to be weighed are discharged from these memory cups 18, the objects W to be weighed to have the target weight can be obtained.

As shown in FIGS. 1 and 4, in the present embodiment, the above-mentioned charging unit 12, the transport unit 13, and the measuring unit 14 are arranged in the vertical direction to form a set of units called channels (CH). In particular, as shown in FIG. 4 (not shown by the weighing unit 14), this channel constitutes the first weighing group G1 with five sets of CH1 to CH5 along the moving direction F of the supply conveyor 3. The second weighing group G2 is composed of five sets of CH6 to CH10 with some intervals along the same direction.

Although not shown, below the combination measuring unit 15 shown in FIGS. 1 and 2, a collecting unit for collecting the objects to be measured W discharged from the selected memory cup 18 in one place and a collecting unit for collecting the objects W are collected by the collecting unit. A discharge chute for discharging a predetermined amount of the object to be weighed W and a transport device provided below the discharge chute to transport the object to be weighed W dropped from the discharge chute to an aftertreatment device such as a packaging device are provided. There is. In addition, in order to secure a height or space below the combination measuring unit 15 so that these configurations can be provided, the entire combination measuring device 1 described above is installed at a predetermined height on the floor by a gantry. May be good.

The operation of the combination weighing device 1 of the first embodiment will be described with reference to FIGS. 1 to 3 and 4.
As shown in FIG. 2, the first input conveyor C1 supplies the first object to be weighed W1 onto the first transfer belt B1, and the second input conveyor C2 supplies the second object to be weighed onto the second transfer belt B2. By supplying W2 and rotating the first transfer belt B1 and the second transfer belt B2 in the opposite transfer directions D as shown in FIG. 3, one end of the supply conveyor 3 (the left end in FIG. 3) The first object to be weighed W1 is dropped from the first conveyor belt B1 and charged into the charging section 12 of the first weighing group G1 (CH1 to CH5, see FIG. 4), and at the same time, the other end of the supply conveyor 3 (in FIG. 3). At the right end), the second object to be weighed W2 is dropped from the second conveyor belt B2 and charged into the charging section 12 of the second weighing group G2 (CH6 to CH10, see FIG. 4). By continuously performing this operation while moving the supply conveyor 3 in the moving direction F, the charging section 12 of the first weighing group G1 (CH1 to CH5) and the loading section of the second weighing group G2 (CH6 to CH10) are performed. The object to be weighed W can be sequentially charged into the twelve.

As shown in FIGS. 1 and 2, the object to be weighed W that has entered the charging section 12 falls into the corresponding transport section 13, is transported, and enters the pool cup 16 of the corresponding measuring section 14. Then, in all the channels CH1 to CH10 shown in FIG. 4, each measuring unit 14 weighs the object to be weighed, and the weighing result is used to add up the first object to be weighed W1 and the second object to be weighed W2. If the combination of the memory cups 18 is selected so that the weight becomes the target weight, and the first object to be weighed W1 and the second object to be weighed W2 are discharged from the combined memory cup 18, the first object to be weighed becomes the target weight. A mix of the weighing object W1 and the second object to be weighed W2 can be obtained.

For example, as shown in FIG. 4, it is assumed that the supply unit 2 starts moving to the right from the leftmost position in the movement direction F (temporarily referred to as a start point) and performs the supply operation as described above. First, at the starting point, the first transport belt B1 is driven to load the first object to be weighed W1 from one end (left end) to the charging section 12 of CH1 of the first weighing group G1, and at the same time, the second transport belt. B2 is driven and the second object to be weighed W2 is charged from the other end (right end) to the charging portion 12 of CH6 of the second weighing group G2. Next, when the supply unit 2 moves to the right along the movement direction F by one channel, the first transport belt B1 is driven again and the CH2 of the first weighing group G1 is input from one end (left end). The first object to be weighed W1 is loaded into the portion 12, and at the same time, the second transport belt B2 is driven again to be second covered from the other end (right end) to the loading portion 12 of CH7 of the second weighing group G2. The weigh-in W2 is loaded. After that, this operation is repeated to input the object to be weighed W in the order of CH3 and CH8, CH4 and CH9 for each of the two channels corresponding to the moving directions F of the first weighing group G1 and the second weighing group G2. .. When the supply unit 2 reaches the rightmost position (temporarily called the end point) in the moving direction F, the first transport belt B1 is driven and the CH5 of the first weighing group G1 is driven from one end (left end). The first object to be weighed W1 is loaded into the loading section 12, and at the same time, the second transport belt B2 is driven to be second covered from the other end (right end) to the loading section 12 of CH10 of the second weighing group G2. The weigh-in W2 is loaded. After that, the supply unit 2 reverses the operation, starts moving to the left from the end point toward the start point, and performs the above-mentioned supply operation in the reverse order of the above-mentioned order.

In the above-mentioned supply operation, the first input conveyor C1 and the second input conveyor C2 shown in FIG. 2 do not necessarily continuously supply the object to be weighed W onto the transport belt B. When the first sensor S1 and the second sensor S2 do not detect a predetermined amount of the first weighted object W1 and the second weighted object W2 on the first conveyor belt B1 and the second conveyor belt B2, respectively. Until the first loading conveyor C1 and the second loading conveyor C2 are driven, respectively, and the first sensor S1 and the second sensor S2 detect a predetermined amount of the first weighted object W1 and the second weighted object W2, respectively. The driving of the first loading conveyor C1 and the second loading conveyor C2 is continued.

Further, in the above-mentioned supply operation, the charging unit 12 of the first weighing group G1 and the charging unit 12 of the second weighing group G2 corresponding to the moving direction F are charged with the first weighted object W1 and the second weighted object. Although it is assumed that the objects W2 are sequentially charged, the objects W to be measured are not always charged into all the charging portions 12. In the loading section confirmation sensor SC provided in the feeding section 2 that reciprocates along the moving direction F, the first transfer belt B1 is the first metered portion in the loading section 12 where the first weighted object W1 is to be loaded next. When the presence or absence of the object W1 is detected and it is determined that the first object to be weighed W1 does not exist in the loading section 12, the first transport belt B1 is operated to move the first object to be weighed W1 into the loading section 12. However, when it is determined that a predetermined amount of the first weighted object W1 is present in the loading unit 12, the first transport belt B1 is stopped to stop the loading of the first weighted object W1. The same applies to the supply of the second object to be weighed W2 by the second transport belt B2.

In this way, while rotating the two parallel transport belts B (first transport belt B1 and second transport belt B2) in the opposite transport directions D (first transport direction D1 and second transport direction D2). , Two types of objects to be weighed W (first objects to be weighed W1 and second objects to be weighed W2) are supplied to each transport belt B, and the supply conveyor 3 is reciprocated in the moving direction F to reciprocate the first weighing group. Two types of objects to be weighed W are efficiently supplied to G1 and the second weighing group G2, and each object to be weighed W is combined so that the total of the two types of objects to be weighed has a predetermined weight. Combined weighing of discharge can be performed efficiently.

In the above description, the combination weighing of the two types of objects W using the combination weighing device 1 of the first embodiment has been described, but the combination weighing of a single type of objects W can also be performed.

The combination weighing device 100 of the second embodiment will be described with reference to FIG.
The combination weighing device 100 of the present embodiment is different from the first embodiment in which two types of objects W1 and W2 are targeted in that one type of object W is targeted, and due to this difference. The configuration is slightly different from that of the first embodiment. Therefore, the same components as those in the first embodiment will be described with the same reference numerals as those in FIG. 5 in FIG. 5, and the description will be mainly focused on the components different from those in the first embodiment.

As shown in FIG. 5, one input conveyor C is provided above the supply unit 2. The loading conveyor C is located at the center position (at the center line L in FIG. 1) in the length (width) of the combination weighing device 100 with respect to the direction perpendicular to the paper surface of FIG. 5, that is, the moving direction F (conveying direction D) of the supply conveyor 3. At the same position as shown), the transport direction is horizontally provided so as to be orthogonal to the transport direction D of the supply conveyor 3. The loading conveyor C drops the object to be weighed W onto the covering body 21 described later above the gap between the first conveyor belt B1 and the second conveyor belt B2.

As shown in FIG. 5, the accommodating body 6 of the supply unit 2 is provided with a covering body 21 above the gap between the two transport belts B1 and B2. In the second embodiment, since there is only one type of object W to be weighed, it is not necessary to partition the first transport belt B1 and the second transport belt B2. Therefore, the covering body 21 of the second embodiment is more than the covering body 11 of the first embodiment. However, it is possible to prevent the object to be weighed W from being caught in the gap between the two transport belts B1 and B2.

According to the combination weighing device 100 of the second embodiment, it rotates in the opposite direction with respect to a plurality of channel CHs (see FIG. 4 of the first embodiment) arranged below the supply conveyor 3 along the moving direction F. The object to be weighed W can be supplied one after another without interruption by the two conveyor belts B1 and B2. Therefore, the object to be weighed W can be efficiently supplied to each measuring unit 14 of the combined measuring unit 15, and the combination weighing by the combination of the weighing in each measuring unit 14 of the measured object W and the weighing result in each measuring unit 14 can be performed. Efficiency is improved.

1,100 ... Combination weighing device 2 ... Supply unit 3 ... Supply conveyor 6 ... Storage unit 7 ... Frame 8 ... Drive mechanism 11,21 ... Cover 12 ... Input unit 13 ... Transport unit 14 ... Weighing unit 15 ... Combination weighing unit 20 ... Acting body W ... Measured object W1 ... First measured object W2 ... Second measured object D ... Supply conveyor transport direction D1 ... First transport direction D2 ... Second transport direction B ... Conveyor belt B1 ... First transport Belt B2 ... 2nd conveyor belt F ... Direction of movement of supply conveyor C ... Input conveyor C1 ... 1st input conveyor C2 ... 2nd input conveyor S ... Sensor S1 ... 1st sensor S2 ... 2nd sensor SC ... Input part confirmation sensor G1 … First weighing group G2… Second weighing group

Claims (5)

With a supply conveyor (3) that rotates in the transport direction (D) to drop the object to be weighed (W) from the end in the longitudinal direction and reciprocates along the movement direction (F) corresponding to the transport direction. ,
A plurality of transport units (13) arranged below the supply conveyor along the moving direction and transporting objects to be dropped from the supply conveyor, and a plurality of transport units (13).
A combination weighing unit having a plurality of measuring units (14) provided below the plurality of transporting units and discharging the objects to be weighed transported to the measuring unit by the transporting unit in a combination having a predetermined mass. Part (15) and
In the combination weighing device equipped with
The combination weighing device (1,100), wherein the supply conveyor has two parallel transport belts (B1, B2) that rotate in opposite transport directions (D1, D2). The supply conveyor (3) is housed and reciprocated together with the supply conveyor along the movement direction (F), and the supplied object to be measured (W) is held on the transfer belts (B1, B2). The combination weighing device (1,100) according to claim 1, further comprising a housing (6). The combined weighing device (1,100) according to claim 2, further comprising a covering body (11, 21) provided above the gap between the two transport belts (B1, B2). A plurality of loading sections (12) provided between the storage body (6) and the plurality of transporting sections (13) to load the object to be measured (W) dropped from the supply conveyor (3) into the transport section. )When,
An actuating body (20) provided on the lower side of the storage body, which comes into contact with the loading unit and drops the object to be weighed dropped from the supply conveyor onto the loading unit as the storage body reciprocates.
The combination weighing device (1,100) according to claim 2 or 3, wherein the combination measuring device (1,100) is provided. A first weighing group (G1) composed of a predetermined number of transporting portions (13) and measuring portions (14) corresponding to the vertical direction continuously arranged in the moving direction (F), and continuously in the moving direction. A second weighing group (G2) composed of a predetermined number of the transporting portions and the measuring portions arranged in the vertical direction is arranged side by side in the moving direction.
The supply conveyor (3) has two conveyors at positions corresponding to the moving directions in the two weighing groups, one end of the first conveyor belt (B1), and the first conveyor belt. The operation of loading the object to be weighed (W) from the other end of the second conveyor belt (B2), which is opposite to the one end of the moving direction, is performed while moving in the moving direction. The combined weighing device according to any one of claims 1 to 4, wherein the combination weighing device is characterized by the above.

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