JP5599285B2 - Combination scale - Google Patents

Description

  The present invention relates to a combination weigher.

  A combination weigher has been put into practical use in which objects to be weighed are distributedly supplied to a plurality of weighing hoppers, each weight value is weighed, and a combination in which the added value of the weight values is closest to the target weight is obtained. This combination weigher discharges and collects the objects to be weighed from the weighing hopper that is the combination closest to the target weight, and can pack them, for example.

  In weighing the weight with such a combination weigher, a weighing signal obtained from a load detector such as a load cell contains vibration components such as vibration inherent to the balance or vibration due to external factors immediately after the start of weighing. Therefore, in order to perform accurate weighing, it is necessary to wait for the weighing signal to converge to a steady value. However, if waiting for convergence, high-speed weighing cannot be performed. Therefore, to enable high-speed weighing, the vibration component is attenuated by a digital signal processing algorithm (dynamic weighing method) such as digital filtering while the measurement signal contains the vibration component, and the weight of the object to be weighed A balance that can read a direct current component corresponding to the above has been developed.

  As the digital filtering described above, a technique using multiple moving average filters or FIR filters is known. For example, as a technique using an FIR filter, Patent Document 1 proposes an FIR filter that attenuates a vibration component included in a digital measurement signal based on a predetermined filter transfer function.

JP-A-7-134057

  By the way, when the weighing hopper is not firmly fixed and attached to the combination weigher main body, that is, when the attached weighing hopper rattles, the frequency of the vibration inherent in the scale becomes small. For this reason, the sampling period at the time of performing the filtering process mentioned above becomes large, and as a result, the filtering process takes time, and the problem that the measurement becomes slow arises.

  Moreover, if the mechanism for attaching the weighing hopper to the combination weigher main body is complicated in order to suppress the rattling of the weighing hopper, it becomes difficult to attach and detach the weighing hopper, and the maintenance or cleaning of the combination weigher becomes troublesome. In particular, in a scale whose use is mainly used for food, such as a combination scale, it is frequently cleaned for hygiene management, and therefore it becomes a big problem that it is difficult to attach and detach the weighing hopper. .

  The present invention has been made in view of the above-described problems, and an object of the present invention is to realize a combination weigher that can easily attach and detach a weighing hopper and can perform high-speed weighing.

  In order to solve the above-described problem, the combination weigher according to the present invention distributes and supplies the objects to be weighed to a plurality of weighing hoppers, performs a combination calculation based on the weight of the objects to be weighed in the weighing hoppers, A combination weigher for obtaining a combination in which the total weight of the objects to be weighed is a value within an allowable range with respect to a target weight, and is attached to a main body of the combination weigher via a weight sensor for detecting the weight of the object to be weighed. A supporting portion having a pair of locking members extending so as to face each other, and the weighing hopper provided in the weighing hopper, extending so as to face each other and engaging with the pair of locking members An attachment portion having a pair of engagement members provided with an engagement portion that engages the support portion, wherein the pair of engagement members and the pair of engagement members are one of the two. The pair of members is the extending direction of the other pair of members Extending so as to sandwich the other pair of members, and by engaging the engaging portion with the pair of locking members, the weighing hopper is locked to the support portion. And at least one of the pair of locking members and the pair of engaging members is not substantially parallel to each other.

  According to the above configuration, since the support portion and the attachment portion are provided, the weighing hopper can be locked to the combination weigher main body portion, and the weight of the locked weighing hopper is measured by the weight sensor. Can be measured.

  Further, the engaging member and the engaging member are engaged with each other so that one pair of members sandwiches the other pair of members. Can be attached to.

  Further, at least one of the pair of locking members and the pair of engaging members is not substantially parallel to each other. For this reason, even if the interval between the pair of locking members or the interval between the pair of engaging members is different from a desired interval due to a manufacturing error or the like, the locking member and the engaging member Abutting portions are always obtained by shifting each other in the extending direction in the positional relationship between the members.

  For this reason, even if an error occurs in the size of the pair of locking members or the pair of engaging members, one pair of members sandwiches the other pair of members in a state where both are in contact with each other. It is possible to engage with each other.

  Therefore, since the positioning weighing hopper can be attached to the combination weigher main body without being displaced, it is possible to prevent the weighing hopper from rattling. Therefore, the vibration frequency inherent to the scale can be prevented from being reduced, and the filtering process can be performed at high speed, so that the weight of the object to be weighed can be measured at high speed.

  In the combination weigher according to the present invention, the engagement member of the support portion and the engagement member of the attachment portion are brought into contact with each other so that one pair of members sandwich the other pair of members. By combining, the weighing hopper is attached to the combination weigher body. For this reason, the attachment mechanism is not complicated, and the weighing hopper can be easily attached and detached.

  Therefore, the combination weigher according to the present invention has an effect that the weighing hopper can be easily attached and detached and high-speed weighing can be performed.

  In the combination weigher according to the present invention, in the state where the weighing hopper is locked to the support portion, at least one of the pair of locking members and the pair of engaging members is the combination member. You may extend so that a space | interval may mutually become large toward the end close | similar to the said measurement hopper from the end close | similar to the main-body part of a balance.

  Further, in a state where the weighing hopper is locked to the support portion, at least one of the pair of locking members and the pair of engaging members is from an end close to the main body portion of the combination weigher. You may extend so that a space | interval may become small toward the end close | similar to the said weighing hopper.

  According to the configuration described above, at least one of the pair of locking members and the pair of engaging members is spaced apart from the end close to the main body of the combination weigher toward the end close to the weighing hopper. Become or become smaller. That is, when manufacturing the locking member or the engaging member, it is only necessary that the intervals be different in one direction, and no new member or the like is added. For this reason, it can manufacture easily, without incurring big manufacturing cost.

  Further, in the combination weigher according to the present invention, the pair of locking members have a first receiving portion and a second receiving portion formed at different positions in the extending direction, and the pair of engaging members are The engaging portion may include a first fitting portion that fits into the first receiving portion and a second fitting portion that fits into the second receiving portion.

  The present invention is configured as described above, and has an effect that the weighing hopper can be easily attached and detached and high-speed weighing can be performed.

It is a schematic diagram which shows an example of the principal part structure of the combination scale which concerns on embodiment of this invention. It is an enlarged view which shows the measurement hopper and its junction part in the combination scale in FIG. It is a perspective view which shows an example of the attachment state of the weighing hopper main-body part shown in FIG. 2, and a hanger. It is a perspective view which shows the weighing hopper main-body part shown in FIG. It is a perspective view which shows the hanger shown in FIG. It is a schematic diagram which shows schematically an example of the expected positional relationship between the hanger and the arm and the actual positional relationship between the hanger and the arm in the combination weigher according to the present embodiment. It is a schematic diagram which shows roughly an example of the positional relationship of the expected hanger and arm in the modification which concerns on embodiment of this invention, and the actual positional relationship of a hanger and an arm. It is a schematic diagram which shows roughly an example of the positional relationship of the expected hanger and arm in the modification which concerns on embodiment of this invention, and the actual positional relationship of a hanger and an arm.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same or corresponding elements are denoted by the same reference symbols throughout all the drawings, and redundant description thereof is omitted.

(Main components of combination weigher)
First, with reference to FIG. 1, FIG. 2, the principal part structure of the combination weigher which concerns on this Embodiment is demonstrated. FIG. 1 is a schematic diagram illustrating an example of a main part configuration of the combination weigher according to the present embodiment. FIG. 2 is an enlarged view showing the weighing hopper 14 and its joint portion in the combination weigher in FIG.

  As shown in FIG. 1, the combination weigher is supported at the center by, for example, four legs (not shown), and a center substrate 17 corresponding to the main body of the combination weigher is disposed.

  Here, the center base body 17 has a substantially inverted polygonal frustum-shaped appearance formed by the lower wall 17A, the upper wall 17B, and the side wall 17C, but is not limited thereto. The center substrate 17 may have another shape, for example, a cylinder or a regular polygonal column. The dispersion feeder 11 and the straight traveling trough 12 are disposed on the upper wall 17B of the center base body 17, and the supply hopper 13, the weighing hopper 14, and the like are disposed outside the side wall 17C.

  Next, each part of the combination weigher according to the present embodiment having the above-described external shape will be described.

  The dispersion feeder 11 is disposed at the center of the upper wall 17B of the center base body 17, and the objects to be weighed supplied from an external supply device (not shown) are radially dispersed by vibration and supplied to the linear feeder 20. Is. The dispersion feeder 11 has a conical shape so that the objects to be weighed can be dispersed radially. In addition, the dispersion feeder 11 determines the vibration width and the operation time so as to uniformly disperse the objects to be weighed according to the control instruction from the control device 18.

  The rectilinear trough 12 is disposed below and around the dispersion feeder 11, and the object to be weighed sent from the dispersion feeder 11 is sent to each supply hopper 13 by vibration given from the rectilinear feeder 20. It is a waste. The linear feeder 20 has its vibration width and operation time controlled by the control device 18. Below the straight trough 12, a supply hopper 13 and a weighing hopper 14 are respectively provided on the center base 17, and a set of the supply hopper 13 and the weighing hopper 14 is formed on the outer periphery (side wall 17C) of the center base 17. Along each other, they are arranged in a circle at a predetermined interval.

  The supply hopper 13 receives an object to be weighed sent from the straight traveling trough 12 arranged at a position higher than itself, and includes a discharge gate 13A and a supply hopper main body 13B. The supply hopper 13 temporarily holds the object to be weighed sent from the straight trough 12, and discharges the object to be weighed to the weighing hopper 14 arranged below the object. For this reason, supply hopper main-body part 13B is carrying out the cylindrical shape with which the upper surface and the bottom face opened. That is, the supply hopper main body 13 </ b> B has an open top surface for receiving an object to be weighed sent from the straight traveling trough 12 and an open bottom surface for sending the received object to be weighed to the weighing hopper 14. When holding the object to be weighed in the supply hopper 13, the opening in the bottom surface of the supply hopper main body 13 is closed by the discharge gate 13A. When discharging the object to be weighed to the weighing hopper 14, the discharge gate 13A is opened at a predetermined timing.

  The weighing hopper 14 temporarily holds the object to be weighed while reading the weight of the object to be weighed supplied from the supply hopper 13 by the load cell 32 which is a load detector. The weighing hopper 14 includes a discharge gate 14A and a weighing hopper main body 14B. The weighing hopper main body 14B has a shape in which an upper surface and a bottom surface are opened, similarly to the supply hopper main body 13B. During the weighing of the object to be weighed, the opening on the bottom surface is closed by the discharge gate 14A, and when the object to be weighed is discharged to the collecting chute 16, the discharge gate 14A is opened at a predetermined timing. .

  Below the weighing hoppers 14 arranged in a circle, a substantially inverted frustoconical collective chute 16 is disposed, and the objects to be weighed discharged from the weighing hopper 14 selected for the discharge combination are placed on the collective chute 16. And is discharged from the lower discharge port 16a to, for example, a packaging machine (not shown).

  The control device 18 includes a CPU and a microcontroller including a ROM and a RAM memory in which an operation program, operation parameters, and the like of the CPU are stored, and controls the operation of the entire combination weigher. The control device 18 can control the operation of the entire combination weigher when the CPU executes an operation program stored in the ROM. More specifically, the control device 18 instructs the dispersion feeder 11 and the rectilinear feeder 20 to control vibration, amplitude, and operation time thereof. Further, the control device 18 controls the stepping motors 30 and 31 so as to open and close the discharge gate 13A of the supply hopper 13 and the discharge gate 14A of the weighing hopper 14.

  Further, the control device 18 receives a load signal output from the load cell 32 to which the weighing hopper 14 is attached, and calculates the weight of the object to be weighed held by the weighing hopper 14 based on the load signal. It also functions as a means. Furthermore, the control device 18 also functions as a combination unit that performs combination calculation. In this combination calculation, the total weight of the objects to be weighed is within a predetermined weight range (allowable range with respect to the target weight) based on the weight of the object to be weighed calculated by the load cell 32 to which the weighing hopper 14 is attached. Find one combination that yields the value of. If there are a plurality of combinations within the predetermined weight range, one combination having the smallest absolute value of the difference between the total weight of the objects to be weighed and the target weight is obtained. The combination of the weighing hoppers 14 holding the objects to be weighed corresponding to the combinations obtained in this way is set as the discharge combination.

  Then, the control device 18 instructs the stepping motor 31 that performs the opening / closing operation to open / close the discharge gate 14A of the weighing hopper 14 selected as the discharge combination at a predetermined timing. Based on the control instruction from the control device 18, the stepping motor 31 opens and closes the discharge gate 14A by rotating the cam folder 21 supporting the discharge gate 14A at a predetermined speed. By opening and closing the discharge gate 14A in this way, it is possible to discharge the object to be weighed from the weighing hopper body 14B or to hold the object to be weighed in the weighing hopper body 14B.

  Further, the weighing hopper 14 that has been emptied by discharging the object to be weighed opens the discharge gate 13 </ b> A of the supply hopper 13 thereabove and supplies the object to be weighed from the supply hopper 13. In addition, the object to be weighed is supplied to the empty supply hopper 13 from the straight traveling trough 12 thereabove. That is, the opening and closing of the discharge gate 14A of the weighing hopper 14, the opening and closing of the discharge gate 13A of the supply hopper 13, and the vibration of the straight traveling trough 12 and the dispersion feeder 11 are interlocked. Is being executed according to.

  Note that the control device 18 does not necessarily need to be configured as a single control device, and a plurality of control devices may be arranged in a distributed manner so that they cooperate to control the operation of the combination weigher. Good.

  In the combination weigher according to the present embodiment, the weighing unit including the load cell 32 that measures the weight of the object temporarily held in the weighing hopper main body 14B, and the opening / closing control of the discharge gate 13A and the discharge gate 13B are performed. The opening / closing control unit including the stepping motors 30 and 31 and the like are integrally formed as the actuator unit 19. The actuator unit 19 can be detachably attached to the center base body 17. The actuator unit 19 includes a flange-like attachment surface 19C for attaching to the side portion 17C of the center base 17, and is fixed to the center base 17 by screwing with this attachment surface.

  In the actuator unit 19, a unit including a measuring unit is disposed outside the center base 17, and a unit including an opening / closing control unit is disposed in the center base 17. A pair of hangers 23 and 24 for attaching the supply hopper 13 and the weighing hopper 14 to a portion (unit portion including the weighing unit) arranged outside the center base body 17 are provided. Furthermore, a cam folder 22 that moves in the rotation direction around the rotation shaft 22A by the stepping motor 30 and a cam folder 21 that moves in the rotation direction around the rotation shaft 21A by the stepping motor 31 are attached to this portion. .

  As shown in FIG. 2, the pair of hangers 23, 24 has an elongated flat plate shape, from the lower end of the portion arranged outside the center base body 17 of the actuator unit 19 toward the side on which the weighing hopper 14 is attached. It is inclined to extend upward. In addition, a pair of hanger 23 is equivalent to a pair of latching member of this invention.

  Further, the cam folders 21 and 22 have a bifurcated fork shape, and are provided so as to rotate around the rotation shafts 21A and 22A at the lower end of the portion of the actuator unit 19 disposed outside the center base body 17. ing.

  In FIG. 2, for convenience of explanation, the illustration of the hanger 23 and the arm 41 </ b> A disposed on the depth side of the paper surface of the pair of the hanger 23 and the arm 41 </ b> A of the bracket 41 is omitted. The same applies to the hanger 24. Furthermore, illustration of the supply hopper 13 is also omitted.

  Further, the combination weigher according to the present embodiment is characterized in the mechanism for attaching the weighing hopper 14 to the combination weigher main body 1. In particular, the hanger 23 and the arm 41 </ b> A of the bracket 41 among the members related to attachment have a characteristic shape. Therefore, the attachment state of the weighing hopper 14 and the configuration of the members related to the attachment (particularly the hanger 23 and the bracket 41) will be described in more detail below. Note that the pair of arms 41A corresponds to a pair of engaging members of the present invention.

(Weighing hopper attached)
First, the attachment state of the weighing hopper 14 will be described with reference to FIGS. FIG. 3 is a perspective view showing an example of a state in which the weighing hopper main body 14 </ b> B and the hanger 23 shown in FIG. 2 are attached. In FIG. 3, for the sake of convenience, only the weighing hopper main body 14 </ b> B including the hanger 23 and the discharge gate 14 </ b> A is taken out and illustrated in order to show the attachment state of the weighing hopper main body 14 </ b> B and the hanger 23.

  First, a description will be given of a member related to the attachment of the weighing hopper main body portion 14B provided on the combination weigher main body portion 1 side. As described above, in the combination weigher, the hanger 23 for holding the weighing hopper main body 14 </ b> B is attached to the combination weigher main body 1 through the load cell 32 of the actuator unit 19.

  More specifically, the hanger 23 is attached to the load cell 32 as follows. First, the load cell 32 is configured to include a square strain generating body 32 a and a connecting portion 32 b that connects the strain generating body 32 a and the hanger 23. The strain body 32a is provided with a plurality of strain gauges (not shown) on the upper surface and the bottom surface thereof. One side surface of the strain body 32a is fixed to a vertical wall surface (not shown) in the actuator unit 19 by, for example, screwing. Further, the load cell 32 is joined to the connecting portion 32b on the side surface opposite to the side surface of the strain body 32a fixed to the wall surface. The connecting portion 32b has a substantially rectangular parallelepiped shape, and the hanger 23 is fixed to the surface on the side where the weighing hopper 14 is disposed via the attachment portion 23C. That is, the pair of hangers 23 are joined to the attachment portion 23C, and a hole is formed in the attachment portion 23C. Therefore, the bolts are screwed into the female screw holes provided in the connecting portion 32b through the holes to fix the attaching portion 23C and the connecting portion 32b. In this way, the hanger 23 is attached to the load cell 32. The pair of hangers 23 extend obliquely upward from both ends of a rectangular flat plate-like attachment portion 23C extending in the vertical plane, and the pair of hangers 23 and attachment portions 23C are, for example, The plate material is bent to form one frame member. This frame member corresponds to the support portion of the present invention. Note that the pair of hangers 23 and the attachment portion 23C may be formed of separate members.

  For this reason, the weight of the object to be weighed in the weighing hopper 14 is applied as a load to the strain body 32a via the hanger 23 and the connecting portion 32b. The strain body 32a is distorted by this load, and this strain is detected by a strain gauge. In this way, the weight of the object to be weighed temporarily held in the weighing hopper 14 can be detected.

  Further, the side surface of the connecting portion 32b (that is, the side surface adjacent to the side surface to which the hanger 23 is attached in the connecting portion 32, the left hand side from the combination weigher main body portion 1 toward the direction in which the weighing hopper 14 is disposed). The cam folder 21 that rotates about the rotation shaft 21A is attached to the surface).

  The cam folder 21 includes a stopper portion 21a and a guide portion 21b. The stopper portion 21a is provided at the tip of the cam folder 21. When the discharge gate 14A is in a closed state, the stopper portion 21a contacts the cam follower 14b included in the discharge gate 14A and holds the discharge gate 14A so as not to open. It is.

  The guide portion 21b is a slit (notch) for guiding the movement of the cam follower 14b. The slit has a curved shape having a predetermined curvature from the tip end portion of the cam folder 21 toward the rotating shaft 21A. . In a state where the discharge gate 14A is closed, when the cam follower 14b is removed from the contact position with the stopper portion 21a by the rotation of the cam folder 21, the discharge gate 14A performs a rotational motion around the fastening member 50 by its own weight (FIG. 2). In the direction of D).

  According to this rotational movement, the cam follower 14b attached to the discharge gate 14A moves in the guide portion 21b along the inner peripheral surface of the cam folder 21. Thus, since the cam follower 14b moves in the guide portion 21b along the inner peripheral surface of the cam folder 21, the shape of the guide portion 21b moves the cam follower 14b by a predetermined distance at a predetermined speed. Can be controlled. That is, the opening speed of the discharge gate 14A and the opening range can be adjusted by the guide portion 21b.

  Next, the member which concerns on the attachment with respect to the combination scale main-body part 1 with which the measurement hopper main-body part 14B is provided is demonstrated.

  First, the weighing hopper main body 14B has a cylindrical shape with an upper surface and a bottom surface opened as described above. Here, as shown in FIG. 3, in the weighing hopper main body 14B, the side surface that is the mounting surface to the combination weigher main body portion 1 is the first side surface 14C, and the side surface that is disposed at a position facing the first side surface 14C is the first side surface. The second side surface 14D is a surface connecting the first side surface 14C and the second side surface 14D, the left side surface from the first side surface 14C toward the second side surface 14D is the third side surface 14E, and the right side surface is the fourth side surface 14F. To do. Note that the first side surface 14C and the second side surface 14D are not flat plates as shown in FIG. 3, but end portions on the side in contact with the third side surface 14E and the fourth side surface 14F are bent so that the first side surface 14C and the second side surface 14D protrude slightly outward. ing.

  At this time, the second side surface 14D is inclined from the top to the bottom toward the first side surface 14C, and is longer in the height direction than the first side surface 14C. For this reason, when the discharge gate 14A is opened, the object to be weighed held in the weighing hopper main body 14B falls in the direction toward the combination weigher main body 1 along the inclined second side surface 14D.

  As shown in FIG. 2, a pair of plate-like brackets 41 is fixed to the combination weigher main body 1 on the third side surface 14E and the fourth side surface 14F of the weighing hopper main body portion 14B. The pair of brackets 41 are formed, for example, by bending a plate material, and have flat plate-like attachment portions 41C and 41C fixed to the third side surface 14E and the fourth side surface 14F, respectively, and the respective attachment portions 41C and 41C. Arm 41A, 41A extending so as to oppose each other toward the combination weigher main body 1 and gate mounting portions 41B, 41B (see particularly FIG. 3) projecting downward from the respective mounting portions 41C, 41C. Have. Bars 42A and 42B for fitting with receiving portions 23A and 23B, which are notches formed in the pair of hangers 23, are provided in the middle and the front end of the pair of arms 41A. The bars 42A and 42B correspond to the fitting portions of the present invention. The pair of arms 41A corresponds to the pair of engaging members of the present invention, and the pair of brackets 41 corresponds to the attachment portion of the present invention. The engaging portion is not limited to the bars 42A and 42B, and may be configured to be fitted to the receiving portions 23A and 23B.

  In addition, as described above, the weighing hopper 14 has a plate-shaped discharge gate 14A that is rotatably supported around the fastening member 50. The discharge gate 14A includes a pair of connecting frames 14c for fastening the discharge gate 14A to the weighing hopper main body 14B by a fastening member 50 provided on the gate mounting portion 41B of the bracket 41, and a cam follower that contacts the cam folder 21. And an operating plate 14a having a tip 14b at the tip. In the discharge gate 14A, when the surface in contact with the weighing hopper main body 14B is an inner surface and the opposite surface is an outer surface, the connecting frame 14c and the operating plate 14a are attached to the outer surface. As shown in FIG. 2, the pair of connecting frames 14c are provided so as to protrude from the side portion of the discharge gate 14A along the third side surface 14E and the fourth side surface 14F of the weighing hopper main body portion 14B. On the other hand, the operation plate 14a extends in the direction opposite to the connection frame 14c, that is, the direction toward the combination weigher main body 1.

  A hole is formed in the end of the connection frame 14c so that the fastening member 50 can be inserted (not shown). For this reason, the fastening member 50 can be inserted from this hole toward the gate mounting portion 41B, and the discharge gate 14A can be rotatably fastened to the weighing hopper main body portion 14B.

  By the way, in the combination weigher according to the present embodiment, the hanger 23 and the arm 41A described above have a characteristic shape. Therefore, the characteristic configuration of the combination weigher according to the present embodiment will be described in more detail below with reference to FIGS.

  FIG. 4 is a perspective view showing the weighing hopper 14 shown in FIG. FIG. 5 is a perspective view showing the hanger 23 shown in FIG. FIG. 6 is a schematic diagram schematically showing an example of the expected positional relationship between the hanger and the arm and the actual positional relationship between the hanger and the arm in the combination weigher according to the present embodiment.

  As shown in FIG. 4, in the pair of brackets 41, the mounting portion 41C of one bracket 41 has a third side surface 14E and a part of the first side surface 14C (the end surface 14C of the first side surface 14C) in the weighing hopper main body portion 14B. '). Further, the attachment portion 41C of the other bracket 41 is welded to the fourth side surface 14F and a part of the first side surface 14C (the end surface 14C ″ of the first side surface 14C). Thus, the two brackets 41 are arranged in parallel with the weighing hopper main body 14B to form a pair.

  Further, the arms 41A of the pair of brackets 41 project in a substantially horizontal direction from the end surface 14C ′ of the first side surface 14C and the end surface 14C ″ of the first side surface 14C, respectively, and further downward at a predetermined angle. It has a bent shape.

  In addition, the gate attachment portion 41B protruding from the attachment portion 41C fixed on the third side surface 14E and the fourth side surface 14F has a screw rod 61 and a fourth side surface that are erected vertically to the third side surface 14E. A screw rod 61 is provided so as to stand vertically with respect to 14F.

  The screw rod 61 is a rod member with a male screw cut, and is for screwing with a pair of fastening members 50 with a female screw cut. That is, by screwing the screw rod 61 and the fastening member 50, the discharge gate 14A can be fastened to the measuring hopper body 14B in a rotatable manner.

  Further, as shown in FIG. 2, a bar 42A is installed in the middle of each of the pair of arms 41A, that is, at a position where each of the pair of arms 41A bends downward, so as to extend between them. In addition, a bar 42B is installed in the vicinity of the distal ends of the pair of arms 41A so as to extend therebetween.

  When the weighing hopper 14 is attached to the combination weigher main body 1, as described above, the bar 42 </ b> A is fitted to the receiving portions 23 </ b> A formed at the tip portions of the pair of hangers 23, and the receiving portions 23 </ b> A are bridged. Mounted in a handing form. On the other hand, the bar 42B is fitted to each of the receiving portions 23B formed at the ends of the pair of hangers 23 on the mounting portion 23C side, and the bars 42B are attached so as to span between the receiving portions 23B.

  In order to attach the weighing hopper 14 to the combination weigher main body 1, first, the bar 42A is fitted into the receiving portion 23A, and the weight of the weighing hopper 14 is received by the receiving portion 23A. Thereafter, in a state where the bar 42A is fitted to the receiving portion 23A, the weighing hopper 14 is pushed toward the combination weigher main body 1 and the bar 42B is fitted to the receiving portion 23B. Fix it. That is, the receiving portion 23 </ b> B is configured to receive the moment of the weighing hopper 14 that works toward the combination weigher main body portion 1. However, the weighing hopper 14 cannot be firmly fixed to the combination weigher main body 1 without looseness only by fitting the bar 42B and the receiving portion 23B and the bar 42A and the receiving portion 23A.

  Therefore, in the combination weigher according to the present embodiment, when the bar 42B is fitted to the receiving portion 23B and the bar 42A is fitted to the receiving portion 23A, the pair of hangers 23 are sandwiched between the pair of arms 41A, The pair of arms 41A and the pair of hangers 23 overlap each other in the extending direction. That is, the pair of hangers 23 are fitted to the pair of arms 41A.

  Thus, by arranging so that one may overlap with the other sandwiching the other in the extending direction, the weighing hopper 14 fixed to the combination weigher main body 1 can be positioned, and rattling can be prevented.

  However, it is difficult to manufacture the pair of arms 41 </ b> A so that the pair of hangers 23 fits together, and a manufacturing error may occur. When the pair of arms 14 </ b> A and the pair of hangers 23 are provided so as to be substantially parallel to each other, a gap due to a manufacturing error is generated between the pair of arms 41 </ b> A and the pair of hangers 23. When it occurs, this gap cannot be closed. For this reason, when the pair of arms 14A and the pair of hangers 23 are provided so as to be parallel to each other, the weighing hopper 14 cannot be firmly attached when a gap due to a manufacturing error occurs.

  Therefore, in the combination weigher according to the present embodiment, as shown in FIG. 4, each of the pair of arms 41 </ b> A has a first bent point 41 a and a second bent point 41 b at the protruding portion from the weighing hopper 14. Have. Each arm 41A is bent at the first bending point 41a so as to extend outward (the direction in which the pair of brackets 41 are separated from each other) with respect to the protruding direction, and again at the second bending point 41b. It is bent so as to extend in the protruding direction. That is, the pair of brackets 41 are symmetrically inclined (tapered) so that the distance between the two is widened from the first bending point 41a to the second bending point 41b. In the example of FIG. 4, by bending at the first bending point 41a and the second bending point 41b, each arm 41A spreads outward by α as compared with the case where each arm 41A is formed in a linear shape. As a result, the distance between the pair of arms 41A is wider by 2α at the second bent point 41b than at the first bent point 41a.

  On the other hand, as shown in FIG. 5, each of the pair of hangers 23 has a third bending point 23a and a fourth bending point 23b. Each hanger 23 is bent at the third bending point 23a so as to extend inward with respect to the protruding direction (a direction in which the pair of hangers 23 are close to each other), and again at the fourth bending point 23b. It is bent so as to extend in the protruding direction. In other words, the pair of hangers 23 are symmetrically inclined (tapered) so that the distance between them is narrowed from the third bending point 23a to the fourth bending point 23b. In the example of FIG. 5, by bending at the third bending point 23a and the fourth bending point 23b, each hanger 23 is narrowed inward by α as compared to the case where the hangers 23 are formed in parallel. As a result, the distance between the pair of hangers 23 is narrower by 2α at the fourth bending point 23b than at the third bending point 23a.

  Thus, in the combination weigher according to the present embodiment, the pair of hangers 23 secured to the combination weigher body 1 and the pair of brackets 41 secured to the weighing hopper body 14B are inclined symmetrically. It has a shape.

  Here, it is assumed that a gap is generated between the pair of hangers 23 and the pair of brackets 41 due to manufacturing errors. In this case, in the combination weigher according to the present embodiment, the pair of hangers 23 and the pair of brackets 41 can be fitted with each other in contact with each other by shifting their positions as follows.

  More specifically, for example, it is assumed that the expected positional relationship between the pair of hangers 23 is the positional relationship indicated by the broken line in FIG. 6 (interval C). Here, it is assumed that the arrangement relation of the actually manufactured hangers 23 is smaller than the expected arrangement relation, and is the positional relation indicated by the solid line in FIG. 6 (distance D).

  In such a case, since the pair of hangers 23 and the pair of arms 41A are arranged so as to be symmetrically inclined, the hangers 23 are projected from the arms 41A in the protruding direction (X direction in FIGS. 3 and 6). The two can be brought into contact with each other at a position shifted from each other. Or both can be made to contact | abut in the position which shifted arm 41A with respect to the hanger 23 to the protrusion direction (Y direction in FIG. 3, FIG. 6).

  In addition, receiving portions 23A and 23B are formed so that a certain amount of gap is formed in the fitting portion of the bar 42B and the receiving portion 23B, and the bar 42A and the receiving portion 23A. Further, since the manufacturing error is generally a very small value, the amount (movement amount) for shifting the positional relationship between the arm 41A and the hanger 23 is actually very small. For this reason, the positional relationship between the arm 41A and the hanger 23 can be changed and fitted.

  As described above, the combination weigher according to the present embodiment is configured so that the weighing hopper 14 is in contact with the weighing hopper 14 in a state in which the hanger 23 and the arm 41A are in contact with each other even if an error occurs in the dimensions. Can be attached to.

  Therefore, the weighing hopper 14 can be firmly fixed to the combination weigher main body 1, and the weighing hopper 14 can be prevented from rattling. Therefore, the vibration frequency inherent to the scale can be prevented from being reduced, and the filtering process can be performed at high speed, so that the weight of the object to be weighed can be measured at high speed.

  Also, the weighing hopper 14 is attached to the main body so that the bar 42B and the receiving portion 23B, and the bar 42A and the receiving portion 23A are fitted, and the hanger 23 and the arm 41A have a contact portion. Only the position where both are fitted is adjusted. For this reason, the weighing hopper 14 can be easily attached to the combination weigher body 1.

  The inclination angle between the first bending point 41a and the second bending point 41b in the arm 41A and the inclination angle between the third bending point 23a and the fourth bending point 23b in the hanger 23 are as follows: It is determined in consideration of the size of the gap between the arm 41A and the hanger 23 that may be caused by a manufacturing error.

  In addition, when an error occurs in the dimensions of the hanger 23 and the arm 41A, the two are fitted at a position shifted from the expected position. Therefore, as a result, the position where the weighing hopper 14 is attached to the combination weigher main body 1 is shifted from the expected position in the height direction. For this reason, in this embodiment, after determining the attachment position of the hanger 23 and the arm 41A, the rotation position of the cam folder 21 and the like are adjusted in the arrangement of members related to the opening / closing control of the discharge gate 14A.

  A modification of this embodiment will be described.

[Modification 1]
In the combination weigher according to the present embodiment, the weighing hopper main body 14B has a configuration in which the bar 42A and the bar 42B are respectively installed between the pair of arms 41A, but is not limited to this configuration. Absent. For example, the bar 42A and the bar 42B may be separated from each other instead of a single bar and provided on each of the pair of arms 41A as separate members (for example, pin members protruding from the arm 41A). That is, any shape that can be fitted to each of the receiving portions 23A and 23B formed on the pair of hangers 23 may be used.

[Modification 2]
In the combination weigher according to the present embodiment, the pair of hangers 23 have a shape extending upward from the lower end of the actuator unit 19 toward the weighing hopper 14 to be attached. Further, the receiving portions 23A and 23B are formed at the end in the extending direction of the hanger 23 (the end on the weighing hopper 14 side) and the end on the combination weigher main body 1 side. On the other hand, the pair of arms 41A protrudes from the first side surface 14C of the weighing hopper 14 toward the weighing hopper main body portion 14B substantially perpendicularly to the first side surface 14C, and goes downward toward the weighing hopper main body portion 14B in the middle. It was the shape extended so that it might incline.
Further, the bar 42B is provided at the end in the extending direction of the arm 41A, and the bar 42A is provided at a point inclined downward from a portion protruding substantially vertically. However, the shape and arrangement of the pair of arms 41A and the pair of brackets 41 are not limited to this.

  A hanger that can hold the weighing hopper 14 on the combination weigher main body 1, that is, a structure that receives the weight of the weighing hopper 14 and can support the movement due to the moment that is applied when the weighing hopper 14 is hooked. 23. The shape and arrangement of the arm 41A are not limited. Furthermore, the number of receiving portions that the hanger 23 has and the number of bars that the arm 41A has are not limited to the above-described numbers.

[Modification 3]
Further, in the combination weigher according to the present embodiment, as shown in FIG. 3, the pair of hangers 23 are sandwiched between the pair of arms 41 </ b> A and are fitted to each other. However, the arrangement may be reversed. . For example, instead of the bars 42A and 42B, it can be realized by providing a protruding portion outward in the axial direction of the bars 42A and 42B and fitting the protruding portion into the receiving portions 23A and 23B.

[Modification 4]
In the combination weigher according to the present embodiment, the pair of hangers 23 and each of the pair of arms 41A are configured to be symmetrically tilted with the same tilt width (α). There is no. Further, at least one of the pair of hangers 23 and the pair of arms 41A may be configured to be symmetrically inclined.

  That is, even when the pair of hangers 23 and the pair of arms 41A are symmetrically inclined with different inclination widths, the weighing hopper 14 is fixed to the combination weigher main body 1 as follows. be able to. For example, it is assumed that the pair of hangers 23 are in a positional relationship indicated by a broken line in FIG. 7 and are expected to come into contact with the arm 41A at point a. However, it is assumed that the interval between the hangers 23 is actually smaller than the expected interval due to manufacturing errors. Even in such a case, as shown in FIG. 7, by moving the hanger 23 from a to a ′, the hanger 23 and the arm 41 </ b> A can abut at the point a ′, and rattling occurs. The weighing hopper 14 can be fixed to the combination weigher main body 1 without using the weighing hopper 14.

  Further, even when at least one of the pair of hangers 23 and the pair of arms 41A is configured to be symmetrically inclined, the weighing hopper 14 is fixed to the combination weigher body 1 as follows. be able to. For example, as shown in FIG. 8, it is assumed that the pair of hangers 23 are arranged in parallel and the pair of arms 41A are symmetrically inclined. For example, it is assumed that the distance between the pair of hangers 23 is in a positional relationship indicated by a broken line in FIG. 8 and is expected to contact the arm 41A at the point b. However, it is assumed that the interval between the hangers 23 is actually smaller than the expected interval due to manufacturing errors. Even in such a case, as shown in FIG. 8, by moving the hanger 23 from b to b ′, the hanger 23 and the arm 41 </ b> A can contact each other at the point b ′. The weighing hopper 14 can be fixed to the combination weigher main body 1 without the occurrence of.

  Thereby, even if it is the combination weigher of this modification, there exists the effect described by this embodiment.

  7 and 8 schematically show an example of the expected positional relationship between the hanger 23 and the arm 41A and the actual positional relationship between the hanger 23 and the arm 41A in the modification according to the embodiment of the present invention. FIG.

  From the foregoing description, many modifications and other embodiments of the present invention are obvious to one skilled in the art. Accordingly, the foregoing description should be construed as illustrative only and is provided for the purpose of teaching those skilled in the art the best mode of carrying out the invention. The details of the structure and / or function may be substantially changed without departing from the spirit of the invention.

  INDUSTRIAL APPLICABILITY The present invention can provide a combination weigher that can be easily attached and can fix a weighing hopper so that rattling does not occur. Therefore, the present invention can be used for various combination weighers used for weighing objects.

DESCRIPTION OF SYMBOLS 1 Combination scale main-body part 14 Weighing hopper 14A Discharge gate 14B Weighing hopper main-body part 14C 1st side surface 14D 2nd side surface 14E 3rd side surface 14F 4th side surface 23 Hanger 23a 3rd bending point 23b 4th bending point 23A Receiving part 23B Receiving portion 23C Mounting portion 32 Load cell 32a Strain body 32b Connection portion 41 Bracket 41A Arm 41B Gate mounting portion 41C Mounting portion 41a First bending point 41b Second bending point 42A Bar 42B Bar 50 Fastening member

Claims (5)

The objects to be weighed are distributedly supplied to a plurality of weighing hoppers, and a combination calculation is performed based on the weights of the objects to be weighed in the weighing hoppers. A combination scale for obtaining a combination of
A support part having a pair of locking members attached to the main body part of the combination weigher via a weight sensor for detecting the weight of the object to be weighed, and extending so as to face each other;
A pair of engaging members provided in the weighing hopper, extending so as to face each other and engaging with the pair of locking members and locking the weighing hopper to the support portion An attachment portion having
The pair of locking members and the pair of engaging members are arranged such that one pair of members is disposed between the other pair of members, and the pair of one member and the other pair of members are relative to each other. to extend both shifted in the lengthwise direction is the engagement portion is engaged with the engaging member by contact, and the weighing hoppers are configured to cause the locking to the support portion,
A combination weigher in which at least one of the pair of locking members and the pair of engaging members is not parallel in the extending direction .   In a state in which the weighing hopper is locked to the support portion, at least one of the pair of locking members and the pair of engaging members is measured from the end close to the main body portion of the combination weigher. The combination weigher according to claim 1, wherein the combination weighers extend toward the end close to the hopper so as to be spaced apart from each other.   In a state in which the weighing hopper is locked to the support portion, at least one of the pair of locking members and the pair of engaging members is measured from the end close to the main body portion of the combination weigher. The combination weigher according to claim 1, wherein the weigh scales extend toward the end closer to the hopper so as to be spaced from each other. The pair of locking members have a first receiving portion and a second receiving portion formed at different positions in the extending direction,
The pair of engaging members include a first fitting portion that fits into the first receiving portion and a second fitting portion that fits into the second receiving portion as the engaging portion. 4. The combination weigher according to any one of items 1 to 3. The objects to be weighed are distributedly supplied to a plurality of weighing hoppers, and a combination calculation is performed based on the weights of the objects to be weighed in the weighing hoppers. A combination scale for obtaining a combination of
A support part having a pair of locking members attached to the main body part of the combination weigher via a weight sensor for detecting the weight of the object to be weighed, and extending so as to face each other;
A pair of engaging members provided in the weighing hopper, extending so as to face each other and engaging with the pair of locking members and locking the weighing hopper to the support portion An attachment portion having
The pair of locking members and the pair of engaging members are arranged such that one of the pair of members extends in the extending direction of the other pair of members to sandwich the other pair of members. The weighing hopper is locked to the support portion by engaging the engaging portion with the pair of locking members,
The pair of members of at least one of the pair of locking members and the pair of engaging members is not substantially parallel to each other ,
The pair of locking members have a first receiving portion and a second receiving portion formed at different positions in the extending direction,
The pair of engagement members includes a first fitting portion that fits into the first receiving portion and a second fitting portion that fits into the second receiving portion as the engaging portion.