JPH0470521A - Apparatus of measuring dropping heavy object - Google Patents

Abstract

PURPOSE:To measure the weight of a heavy substance within a container at the receiving position with high accuracy regardless of the supplying shock every time the substance is supplied by supporting the container by a bearing through an inverse U-shaped load transmission platform and a rotary driving mechanism. CONSTITUTION:In the standby state, a container 27 for receiving an object is put on a load transmission platform 19. A leg part 28 protruding downward of the container 27 is spaced from a sensitive part of a weighing scale 24. When a heavy object is supplied into the container, the load acts upon a bed 1 through the load transmission platform 19 and a rotary driving mechanism astride the container and bearing 6-9 at both sides of the container, and therefore, it becomes possible to receive the large load without concentrating the load locally. When the heavy object is supplied, a vertical driving mechanism 30 is activated to move a vertical shifting part upwards, and the weighing scale 34 is raised. Therefore, the sensitive part butts against the leg part 28 of the container 27 which is in turn lifted while extending a link 44. The container 27 containing the heavy object is separated from on the transmission platform 19 at the uppermost position. The gravity of the container 27 acts totally to the sensitive part of the weighing scale 34, and the weight of the heavy object is measured.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention mainly relates to a device for measuring the weight of a kneaded material dropped from a hatch-type kneader for kneading highly viscous materials such as rubber and plastics. be.

<Prior art> The tank capacity of a batch type kneader is several thousand liters, and the kneaded material is usually discharged in lumps, or sometimes a part of the kneaded material is removed from the mixer. This residual image may remain in the tank or be discharged together with the kneaded material to be discharged next. In this case, since the residual material is mixed in twice-kneaded state, it is not possible to tell from the outside whether the quality of the mixed material is degraded or not, especially in a closed-type kneading machine such as a Pambari mixer.

In contrast, in the past, there was a concept of sorting the kneaded material by measuring the weight of the discharged kneaded material without disturbing the production line each time the kneaded material was discharged, and determining the presence or absence of residual material. Even if the weight is measured by sampling, the discharged kneaded material should be transported to a location off the production line using a conveyor, crane, transport vehicle, etc. and weighed, and if the measured weight is normal, The method used was to return the product to the production line.

<Problems to be Solved by the Invention> Therefore, the present invention aims to accurately weigh the heavy object inside the container at the receiving position every time the heavy object is dropped into the container, regardless of the impact at the time of dropping. An object of the present invention is to provide a weighing device for dropping heavy objects, which can carry out weighing operations and send the heavy objects to a transfer side without disturbing the production line after weighing.

Means for Solving the Problems> In the present invention, as a technical means for achieving the above-mentioned problems, a weighing device for a dropped heavy object is configured as follows. That is, a vertical drive mechanism is provided at the center of the bed and has a vertical displacement section at the upper end, and a receiver is placed on the left and right fixed bases integrated with the bed or on the vertical displacement section and protrudes upward at the upper end. A weighing device having a sensing part, an inverted U-shaped load transmission pedestal extending from above the weighing device to the left and right sides thereof, and a rotational drive mechanism that rotates the load transmission pedestal around a predetermined point on both sides thereof; Bearings that support the rotational drive mechanism on both the left and right sides of the bed, and a
a dropped object receiving container that is placed so as to be able to be separated from each other and that is provided with a leg that penetrates the load transmission frame and projects downward at a position corresponding to the sensing section of the weighing device; and a rotation of the rotational drive mechanism. It has a fixed node near the axis and a link connecting the container, and after a heavy object is dropped into the container, the vertical drive mechanism is operated to lift the weighing device and move the weighing device or the container to the top. The container is characterized in that weighing is performed while being separated from the load transmission pedestal, and then the container is rotated by the rotation drive mechanism via the load transmission pedestal.

Further, it is preferable that the length of the link has play to expand and contract within an allowable range, and that the fixed node is set above the rotational axis of the rotational drive mechanism.

<Operation> In the state of waiting for reception of heavy objects, the dropped object receiving container is placed on the load transmission frame, and the downwardly projecting legs of this container are separated from the sensing part of the weighing device.

When a heavy object is dropped into the container from the material outlet of the mixer, the load acts on the bed via the load transmission frame on both the left and right sides, the rotation drive mechanism, and the bearings on both the left and right sides. The bridge can be stopped without concentrating a large load on one part. At this time, since the legs of the container and the sensitive part of the weighing device are separated from each other, no applied load acts on the weighing device.

When a heavy object is dropped, the vertical drive mechanism is activated and its vertical displacement part is moved upward, causing the scale to rise and contact its sensing part with the leg of the container, and the container or link. It can be lifted while being stretched.

At the upper limit position, the container containing the heavy object is separated from the load transmission frame, and the gravity of the container acts on the sensing portion of the weighing device. In this state, heavy objects are weighed.

After this weighing, the rotary drive mechanism is operated to rotate the load transmission frame and the container placed thereon, and when the container faces diagonally downward, the heavy object falls by itself and is sent to the next process. At this time, the container is held on the load transmission frame by the link without falling. In addition, by setting the fixed joint that connects the link above the rotational axis of the rotation drive mechanism, the container can be connected to the load transmission frame by the link regardless of the expansion and contraction of the link during rotation of the container. The container is held in place, and only the container wobbles. Thereafter, the load transmission frame is rotated by the rotary drive mechanism to return to the original receiving standby state, and continuous weighing can be performed without disturbing the production line.

<Embodiment> Hereinafter, a preferred embodiment of the present invention will be described in detail starting from 7 with reference to the drawings.

FIG. 1 shows a front view of an embodiment of the present invention, and FIG. 2 shows a left side view thereof. At the front end of the head 1, two bearing stands 2 and 3 that face each other in the front-back direction stand upright, and at the rear end of the bed 1, two bearing stands 4 and 5 that face each other in the front-back direction also stand upright. and a bearing 6 consisting of a roller bearing on the front bearing stand 2.3,
A gear 10 is supported by 7, and a gear 11 is supported by bearings 8 and 9 consisting of roller bearings on a rear bearing stand 4.5.

On the other hand, bearings 45 each consisting of a ball bearing provided in each of the bearing stands 2 to 5. . . , 45 holds one main drive shaft 14, and small gears 12 and 13 fitted on this main drive shaft 14 are meshed with the gear 1011. The rotation of the motor 16 in both forward and reverse directions of the drive source is transmitted to the main drive shaft 14 via a worm gear mechanism 15 consisting of an ohm 15a directly connected to the motor 16 and a wheel 15b fitted to the main drive shaft 14. be done. The motor 16 mentioned above
, worm gear mechanism 15. Main drive shaft 14. Small gear 12.
13 and gears 10 and 11 to connect the load transmission frame 1, which will be described later.
9 rotation drive mechanisms are constructed.

The shafts 17.18 of the gear wheels 10.11 are located on the same axis. On the first load transmission frame, a bridge section 22 is passed between the upper ends of a pair of front and rear coupling sections 20.21 to form an inverted U-shape, and each coupling section 2021 or each shaft 17.18
and is integrally coupled to the inner surface of each gear 10.11, and an arcuate balance weight 23.24 is provided at the lower end of the coupling portion 20.21.

A buffer sheet 2 such as a rubber plate is placed on the top surface of the bridge section 22 described above.
A container stand 26 is placed on the container stand 26 via the container 5, and a dropped object receiving container 27 with an upward opening for storing a heavy kneaded material is fixed onto the container stand 26. The bottom of this container 27 has four legs 28. , 28 penetrates the container stand 26 and projects downward, and each of the two legs 28 . ...
, 28 penetrate the bridge portion 22 in a vertically movable manner and protrude downward, and the container 27 is placed on the bridge portion 22 of the load transmission frame 19 so as to be freely joined to and separated from the bridge portion 22 . In addition, each leg portion 28,
As shown in FIG. 4, 28 has an upwardly outwardly tapered surface formed on its upper part so that it can be positioned and smoothly inserted into and out of the insertion hole of the bridge part 22, and the lower end abutment It has an inverted trapezoid shape with the connecting part or peripheral part removed diagonally.

A vertical drive mechanism 30 is disposed on a stand 29 provided in the center of the head 1, and a pair of front and rear fixed stands 31 and 32 attached in the front and back direction on this stand 29 have four parts projecting upwardly at both left and right ends. 33 bolts. . . 33 are provided, and an electronic scale 34 or its holder 35 is placed on top of the four bolts 33° . . . , 33.

There are four sensing sections 36 provided on the top surface of the electronic weighing device 34. . . , the top surface of 36 or the four legs 28. ..., facing the lower end surface of 28 so as to be able to come into contact with and separate from it. The sensing section 36. ..., 36's upper end bone has a trapezoidal shape with the peripheral edge obliquely removed.

To explain the vertical drive mechanism 30 in more detail, driven gears 39 and 40 are engaged with both left and right sides of a main drive gear 38 connected to the output shaft of a motor 37 with a reduction gear, which is a drive source that rotates in one direction.
A pair of left and right camshafts, which are rotationally driven by the two driven gears 39° and 40, have 4 vertically displaceable parts at both front and rear ends.
A number of cams 41°41 are provided. On the other hand, four cam followers 4 are mounted on the lower surface of the holding table 35 of the weighing device 34 described above.
2,..., 42 are arranged and four cams 41. ...
It corresponds to 41.

Furthermore, the top of the outer wall plate of the fixed base 31, 32 or the support plate joined thereto extends to the vicinity where it intersects with the axis of each shaft 17, 18 of the left and right gears 1011, and extends slightly above the axis. A fixed joint 43.43 consisting of a binge joint is provided at an eccentric position, and this fixed joint 43.43
and the container stand 26 with a longitudinal play.
44 are connected.

Next, the operation of this embodiment will be explained. In FIG. 1, the right half with respect to the center line shows the standby state, and the left half shows the weighing state.

In the standby state, the scale 34 and its holding base 35 are held together by four bolts 33. ..., placed on 33, four cams 41
．． ..., 41 cam rollers 46 are located at the lower limit as shown in the right half of FIG. ..., 42 are spaced apart. Also,
The container 27 for receiving the kneaded material is the first container shown by the solid line in FIG.
It is placed on the bridge portion 22 of the inverted U-shaped load transmission frame 19 in state (I).

When a kneaded material is dropped into the container 27 from the closed kneader above, a sensor (not shown) detects this and the motor 37 with a reduction gear is driven and the main gear 38 starts rotating. Accordingly, the driven gears 39 and 40 both rotate once in the same direction and return to the standby state. At exactly half a turn in the middle, the four cams 41. as shown in the left half of FIG. . . 41 cam rollers 46 simultaneously rise to the upper limit position, and the cams 41.・
...41 cam roller 46 is a cam follower 42. ...
.

42 and raises the weighing device 34 via the holding table 35. As the K-meter 34 rises, its four sensing sections 36.
..., 36 or four legs 28 protruding from the bottom surface of the container 27
．． . . , the container 27 is raised without touching the link 28 and extending the link 44, and the α shown in FIG.
Separate them by a long distance. Weighing is performed in this state.

The control unit is composed of, for example, a microcomputer, and stores in advance the total weight of the raw materials put into the closed kneading machine installed above the measuring device, and compares the total weight of the raw materials put into the closed kneading machine installed above the measuring device with the stored data. If the measured value is within the predetermined tolerance range, it is judged to be "normal," and if the measured value is smaller than the tolerance range, it is assumed that some material remains in the kneading machine tank, and vice versa. If it is larger than the allowable range, it is presumed that some residual material from the previous time has been added, and in either case, it is determined that there is a quality problem and it is determined to be "abnormal."

When the scale 34 returns to the standby state, if it is determined to be "normal", the motor 16 rotates forward to rotate the gear 10° 11 clockwise in FIG. becomes the state (I[), and the kneaded material in the container 27 naturally falls and is transferred to the next step by a container or the like. If it is determined that there is an "abnormality", the motor 16 is reversely rotated to rotate the gears 10 and 11 counterclockwise, and the container 27 is placed in state (I), and the kneaded material in the container 27 is different from that in the normal case. It naturally falls onto another conveyor.

As shown in FIGS. 1 and 3, the fixed joint 43 is provided with its rotation center C2 eccentrically above the rotation center CI of the load transmission frame 19 by approximately the maximum extension length d of the link 44. be. Now, if the distance between the center of rotation C2 and the container stand 26 in the standby state is D, then the distance between the center of rotation C2 and the container stand 26 after the container 27 has rotated becomes D10d by extending the link 44. Also, this D+d is almost the same as the distance between the rotation center C1 and the container stand 26 in the standby state, and therefore, the container stand 26 is connected to the bridge portion 22 regardless of the expansion and contraction of the link 44 during the rotation operation of the container 27. It is possible to maintain the bonded state and prevent the container 27 from wobbling.

Incidentally, if the rotation centers C1 and 02 are set at the same position,
When the container 27 is rotated, it is positioned as shown by the broken line in FIG. 3, and the container 27 comes into contact with and separates from the bridge portion 22 during rotation, causing rattling.

In addition, in the above embodiment, as shown in FIG. 4, the lower end of the opposing leg 28 and the top of the sensing section 36 are both shaped so that the peripheral edges of the end portions are removed. When the containers 27 rotate, they can be placed as close as possible without coming into contact with each other, and the vertical movement range of the weighing device 34 can be reduced.

In the above embodiment, the scale 34 is mounted on the left and right fixed stands 31.3.
The weighing device is placed on the port 33 provided in 2, and the weighing device is lifted up by the rise of the cam 41, which is the vertical displacement portion of the vertical drive mechanism, or the weighing device is placed directly on the vertical displacement portion and the weighing device is placed on the vertical displacement portion. You may also do so. In addition, the load transmission frame 1
The rotary drive mechanism 9 may have a configuration other than gears 10 and 11.

<Effects of the Invention> As described above, according to the weighing device for heavy objects of the present invention,
The heavy object receiving container is supported by bearings on both the left and right sides of the pet via an inverted U-shaped load transmission frame that spans the left and right sides and a rotational drive mechanism, so it can withstand large loads of several tons dropped into the container. Uke is forced to concentrate on one part and is stopped on the bed.

Further, after receiving the heavy object, the weighing device is raised, the sensing part of the weighing device pushes up the leg of the container, the container is separated from the load transmission frame, and the heavy object inside the container is weighed at the receiving position, Since the container is then rotated and the heavy object is discharged, it is possible to weigh the heavy object each time it is dropped into the container without disturbing the production line, and the heavy object can be sent to the transfer side.

Furthermore, by setting the fixed node connected to the container via the link above the rotational axis of the rotation drive mechanism, the container can be joined to the load transmission pedestal and can be freely connected to and separated from the load transmission pedestal. It is possible to rotate it while holding it in the same state.

[Brief explanation of the drawing]

Fig. 1 is a schematic front view of an embodiment of the present invention, Fig. 2 is a schematic left side view thereof, Fig. 3 is an explanatory diagram of the container when it is rotated, and Fig. 4 is an illustration of the sensing portion when the container is rotated. FIG. 3 is an explanatory diagram showing the relationship between legs. 1...Head 6, 7. 8. 9...Bearing 10.11...Gear 12.13...Small gear 14...Main drive shaft 15...Ohm gear mechanism 16...Motor 19...Load transmission frame 27...・Dropped object receiving container 28...Legs 30...Vertical drive mechanism 31, 32...Fixed base 34...Weigher 36...Sensing part of the weigher 37...Motor with reducer 38 ...Main gear 39.40...Followed gear 41...Cam (vertical displacement part) 42...Cam follower 43...Fixed joint 44...Link $1! ii

Claims (2)

[Claims] (1) A vertical drive mechanism disposed at the center of the bed and having a vertical displacement section at the upper end, and a vertical drive mechanism placed on the left and right fixed tables integrated with the bed or on the vertical displacement section and protruding upward at the upper end. A weighing device having a sensing part, an inverted U-shaped load transmission pedestal extending from above to both left and right sides of the weighing device, and a rotational drive mechanism that rotates the load transmission pedestal around a predetermined point on both sides thereof. , a bearing that supports the rotational drive mechanism on both left and right sides of the bed, and a bearing that is mounted on the load transmission frame so as to be able to be joined and separated; It has a dropped object receiving container having legs that penetrate the transmission frame and protrude downward, and a link that connects the container to a fixed joint near the rotational axis of the rotational drive mechanism, and the container has a droplet receiving container that has legs that protrude downward through the transmission frame. After being dropped, the vertical drive mechanism operates to lift the weighing device, and the weighing device separates the container from the load transmission pedestal and weighs it;
The device for weighing a dropped heavy object is configured such that the container is then rotated by the rotational drive mechanism via the load transmission frame. (2) The heavy object to be dropped according to paragraph 1, wherein the length of the link has play to expand and contract within an allowable range, and the fixed joint is set above the rotational axis of the rotational drive mechanism. Weighing device.