JP2005112546A - Elevation device with platform scale - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevation device capable of measuring accurately the weight of an object placed on an elevating table and carrying out the placed object easily from the table. <P>SOLUTION: The elevator device is equipped with an elevator element 5 capable of rising and falling along a column 4 installed upright on a base 3 and the elevating table 6 where the object is placed in front of the elevator element 5, wherein the elevator element 5 and the elevating table 6 are engaged through a support 8, and when the table 6 is sunk onto the platform scale 7 positioned below the elevating table 6 and abutted to and placed on the platform scale 7, the support 8 in engagement is released in association with a further sink of the elevator element 5 so that the elevating table 6 and the elevator element 5 are separated into the non-touching condition. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lifting device capable of lifting and lowering an article placed on a lifting table in front of a lifting body to a predetermined height.

Patent Document 1 describes a lift device that can weigh the drum can including the contents when the drum cans are lifted and inverted to discharge the contents.
Japanese Patent No. 3261402

In Patent Document 1, a substantially cylindrical container such as a drum can is supported on a reversing frame, and the contents of the container are discharged by raising the elevating frame and rotating the reversing frame. Although the measurement accuracy is improved by linking the means and reducing the influence of moment load and reaction force, the member supporting the drum can and the measurement means are connected, so there is frictional resistance of mechanical parts, There was a problem that the weighing error was large.
This invention solves the above problems, and makes it a subject to provide the raising / lowering apparatus with a base scale which can measure the weight of articles | goods accurately and can carry out the mounted articles | goods easily.

In an elevating apparatus provided with an elevating body 5 that can be raised and lowered along a support column 4 standing from a base 3 and placing an article in front of the elevating body 5, the elevating body 5 and the elevating table 6 are While being engaged through the support body 8, when the elevating table 6 is lowered onto the platform scale 7 located below the elevating table 6 and placed on the platform scale 7, the elevating body 5 is further lowered. Accordingly, the engagement of the support 8 is released, and the lifting table 6 and the lifting body 5 are separated from each other in a non-contact state.
Further, the lifting device 6 is capable of weighing on the condition that the lifting table 6 on the platform balance 7 is not in contact with the lifting body 5.
In addition, an elevating device is provided, which is provided with impact mitigation means 9 for mitigating the impact on the platform balance 7 when the elevating table 6 is placed on the platform scale 7.
Further, a platform balance 7 located below the elevation table 6 is placed on the base 3, the front wheel 1 and the rear wheel 2 are provided before and after the base 3, and the platform scale 7 is configured to be movable together with the base 3. A device.
Further, a supply device 10 for filling the container 11 such as a bag or a container placed on the lifting table 6 with grains or the like is provided, and the supply amount B of the supply device 10 is controlled according to the weight detection value A of the platform scale 7. A lifting device provided with possible control means 11 is used.

  In the first aspect of the present invention, since the lifting body and the lifting table are engaged via the support body 8, the lifting table 6 can be lifted while maintaining a substantially horizontal state. When the elevating body 5 is lowered onto the position of the platform balance 7, the elevation table 6 comes into contact with the platform scale 7. Thereafter, when the elevating body 5 is further lowered, the elevating table 6 can be placed on the platform scale 7 in order to disengage the support 8 and separate the elevating table 6 and the elevating body 5 from each other in a non-contact state. If the weight of the lifting / lowering table 6 or the container placed on the lifting / lowering table is subtracted by taring, the weight in the container can be accurately measured according to the accuracy of the platform scale 7. Moreover, since the raising / lowering table 6 can be raised to predetermined height, articles | goods can be carried out easily, without an operator bending down.

  The invention according to claim 2 enables the weighing of the platform balance 7 on the condition that the elevation table 6 placed on the platform balance 7 is in a non-contact state with the elevation body 5. 6 and the elevating body 5 are in contact with each other and the support body 8 has a contact frictional resistance. Therefore, the weighing can be performed only in the non-contact state. Thus, the exact weight of the article can be measured.

  Since the invention according to claim 3 is provided with the impact mitigation means 9 for mitigating the impact on the platform balance 7 when the elevation table 6 is placed on the platform balance 7, the elevation table 6 is placed on the platform scale 7. The impact at the time of relieving is mitigated, and the lifting table 6 can be surely placed on the platform balance 7, and failure and breakage of the platform balance 7 can be prevented and accurate weighing can be maintained.

  According to the invention described in claim 4, the platform balance 7 positioned below the lifting table 6 is placed on the base 3, the front wheel 1 and the rear wheel 2 are provided before and after the base 3, and the platform scale 7 is moved together with the base 3. Therefore, the weight can be measured at an arbitrary place, and the weighed article can be easily transported while being placed on the lifting table 6. Furthermore, if the lifting / lowering table 6 is lifted and separated from the platform balance 7 during transportation, the vibration and impact load of the heavy material transmitted to the lifting / lowering table 6 are not directly transmitted to the platform balance 7, so that there is little failure of the platform balance 7 and good accuracy. Weighing can be maintained.

  According to the fifth aspect of the present invention, a supply device 10 for filling grains 11 and the like into a container 11 such as a bag or a container placed on the lifting table 6 is provided, and the supply device 10 according to the weight detection value A of the platform balance 7. Since the control means 11 capable of controlling the grain supply amount B is provided, the measurement variation and measurement error due to the drop impact into the container 11 are controlled while controlling the grain supply amount B supplied into the container 11. It is possible to reduce the amount, and the weighing bag filling operation with high accuracy can be performed. Further, when the weight detection value A is set to a predetermined weight in advance, the supply of the supply device 10 can be automatically stopped, and a series of weighing, transportation, and carry-out operations can be performed efficiently.

  First, the structure of the lifting device of the present invention will be described. As shown in FIGS. 1 and 2, a pair of left and right front wheels 1 and rear wheels 2 can be freely rotated on a base 3 having a U-shaped front opening U. The column 4 is erected from the center of the left and right of the rear part of the base 3. The support column 4 includes a rear support column 4b having a U-shaped front opening cross section and a front support column 4a of a square pipe material arranged in front of the rear support column 4b. The rear support column 4b and the front support column 4a are each composed of an upper end connecting frame 20 and a lower end connecting frame. 21 is connected. On the upper rear surface of the rear column 4b, a steering handle 22 is attached for the operator to steer the carriage.

  In front of the front column 4a, an elevating body 5 that can be moved up and down along the front column 4a is provided. The elevating body 5 is guided to roll along the front and rear surfaces of the front strut 4a by pivoting a roll 24 on the front upper and lower positions of the elevating frame 23 surrounding the front strut 4a and the rear upper portion. It can be moved up and down. A driven sprocket 25 is pivotally supported on the upper end connecting frame 20, and a chain 27 is wound around the lower drive sprocket 26, and one end of the chain 27 is connected to the elevating frame 23 from above. The other end of 27 is connected to the lower part of the lifting frame 23. To attach the chain 27 to the lifting frame 23, a U-shaped mounting frame 28 is fixed to the lower part of the lifting frame 23, and a sliding rod 29 is inserted from below, and a sliding rod is interposed via a spring 30. The spring 30 is configured to be resiliently urged upward and connected to the lower end of the sliding rod 29, and the spring 30 is capable of absorbing a shock when driving up and down.

The elevating frame 23 of the elevating body 5 and the elevating table 6 provided in front of the elevating frame 5 are engaged via the support body 8. A specific configuration of the support 8 will be described. A pair of left and right bosses 31 are provided at the rear part of the lifting table 6 and can be engaged with a pin 33 standing on a support plate 32 protruding forward from the lifting frame 23. The pair of left and right bosses 31 are inserted into the pins 33 from above to support the lifting table 6 in a cantilever manner.
The front portion of the base 3 is connected by a connecting member 34a that horizontally spans between the left and right bases 3 at an appropriate interval in the front and rear. A platform scale 7 is placed on the upper surface of the scale base 34. Further, on the upper surface of the scale base 34, an adjustment bolt 35 for leveling provided at the lower part of the platform scale 7 is fitted, and a displacement prevention member 36 for preventing the platform balance 7 from being displaced in the horizontal direction is provided. For preventing the base balance 7 from shifting, it is possible to use means such as surrounding the base scale 7 or fixing the base scale 7 to the scale base 34.

  The platform balance 7 is positioned below the elevation table 6 that moves up and down. When the elevation table 6 supported by the support body 8 is lowered in front of the elevation body 5, the lower surface of the elevation table 6 comes into contact with the upper surface of the weighing unit 7 a of the platform balance 7. From this state, the elevating body 5 is further lowered, the engagement of the support body 8 is released with the elevating table 6 placed on the measuring portion 7a, and the elevating table 6 and the elevating body 5 are separated into a non-contact state. . Whether or not the lifting table 6 and the lifting body 5 are reliably separated in a non-contact state may be determined by detection means such as a limit switch (not shown). Weighing is possible. This is to prevent inconvenience that the platform balance 7 displays an error such as an overload due to an impact when the elevating table 6 is placed on the platform balance 7 and to perform accurate weighing. Accordingly, if it is detected that the support 8 is disengaged, a configuration in which the power source of the platform balance 7 is turned on, or a configuration in which measurement can be performed only when the elevating body 5 is at the lowest limit position may be employed. Further, the weight can be displayed at an arbitrary position, but it is preferable to display it at a position that can be visually recognized by an operator behind the machine body.

On the lower surface of the lift table 6, an elastic body 48 of sponge or rubber material is pasted as an impact relaxation means 9 that can reduce the impact caused by the contact between the lift table 6 and the measuring portion 7 a. Further, when the lifting table 6 is placed on the upper surface of the weighing unit 7a, a displacement regulating member 49 that is loosely fitted to the lower weighing unit 7a is provided at the lower part of the lifting table 6 in order to prevent horizontal displacement.
With this configuration, the support body 8 can be reliably engaged or disengaged, and the lifting table 6 and the lifting body 5 on the weighing unit 7a can be measured in a non-contact state with good measurement accuracy. Can do.
The configuration of the impact relaxation means 9 is not limited to the elastic body 48, and the impact may be reduced by reducing the descending speed when the lifting table 6 is placed. Further, the support body 8 that supports the lifting body 5 and the lifting table 6 is not limited to the above-described configuration, and the lifting table 6 is not moved in the horizontal direction on the measuring unit 7a. 6 and the lifting body 5 can be separated from each other in a non-contact state, and when the lifting body 5 is raised, it can be configured so that it can be reliably engaged again.

M is a motor that drives the lifting body 5 up and down, 37 is a reduction gear box, both of which are integrally connected, and the reduction gear box 37 is attached to the base 3. The driving force of the motor M is decelerated by the worm wheel reduction mechanism in the reduction gear box 37 and its output shaft is transmitted to the drive sprocket 26.
On the left and right sides of the rear column 4b, there are an upper limit switch 38 and a lower limit switch 39 for detecting the rising end position and the lower end position of the lifting body 5 and intermittently driving the motor M, and between the upper and lower limit positions. The intermediate limit switch 40 for intermittently raising and lowering the elevating body 5 is provided. Reference numeral 41 denotes a cam plate for operating a limit switch protruding from the rear portion of the lifting frame 23. Each of these limit switches 38, 39, 40 is configured such that the vertical mounting height position can be changed.

  The support column 4 is covered with covers 43 and 43 on the left and right sides, and a battery 44 for power supply and a controller 45 are disposed on the sides of the covers 43 and 43. The pair of left and right steering handles 22 provided on the upper rear surface of the rear column 4b are formed integrally by bending a pipe rod, and a grip 46 is provided at the tip thereof. The steering handle 22 has a width substantially the same as that of the base 3 and is widened rearward so that the steering operation can be easily performed, and the front wheel 1 and 1 are floated by tilting the airframe around the rear wheels 2 and 2. The steering handle 22 is configured to be substantially horizontal during all transportation. In other words, the front and rear wheels 1 and 2 can be transported while being grounded, or the front wheel 1 can be lifted and transported by tilting the airframe backward. Provided in front of the right grip 46 is an activation switch 47 for raising and lowering the lifting body 5 that can be operated while the operator holds the grip 46.

For example, a description will be given of an operation mode when the grain supplied from the vertical grain sorter 10 is transported by the lifting device including the front and rear wheels 1 and 2. The vertical grain sorter 10 shown in FIG. It is a conventionally well-known one, and the brown rice after scouring is supplied from the hopper 16 and the crushed grains are leaked from the surrounding sorting net while being crushed by the inner husk helix, and only the sized particles are transferred to the upper tank 17. The cereal is supplied and filled into the grain bag 15.
The vertical grain sorter measures the weight of the grain bag 15 placed on a platform balance that is usually placed on the ground. When the filling amount reaches a predetermined weight, the shutter 18 is closed and the sized grains to be cerealed are stored in the tank 17. In the present invention, the platform 7 is mounted on the base 3 of the lifting device and placed on the weighing unit 7a of the platform 7 while being stored inside and taking out the grain bag 15 from the platform. The weight of the grain filled in the grain bag 15 is measured by the platform balance 7, and the opening / closing of the shutter 18 of the vertical grain sorter 10 can be controlled according to the measured weight detection value A, and the weight detection value A The shutter 18 can be automatically closed when a predetermined amount (for example, 30 kg) is reached. Moreover, when the predetermined amount is approached, the shutter 18 is closed half, the amount of the grain supplied to the grain bag 15 is reduced, and when the predetermined amount is reached, the shutter 18 is fully closed. Can also be done. Note that the signal transmission between the vertical grain sorter 10 and the platform balance 7 may adopt either a wired configuration or a wireless configuration. For convenience of mounting the platform balance 7 on the lifting device side, a wireless configuration is used. Is preferred.
Further, in the present embodiment, the grain bag 15 in which the lifting table 6 and the standing basket 19 for maintaining the standing state of the grain bag 15 are inserted is placed on the weighing unit 7 a of the platform balance 7. Therefore, the platform scale 7 is configured to tare and weigh those weights.

When a predetermined amount of grain is filled in the grain bag 15 and the shutter 18 of the vertical grain sorter 10 is closed, the operator holds the steering handle 22 and moves the lifting device backward, and the start switch 47 is pressed. Turn on. When the activation switch 47 is turned on, the elevating body 5 rises, the support body 8 engages and supports the elevating table 6 from below, and the grain bag 15 is raised. When the lifting body 5 turns on the intermediate limit switch, the lifting body 5 stops. This height is set to a height suitable for an operator standing behind the machine body to close the bag mouth 15a of the grain bag 15. In addition, what is necessary is just to take out the standing basket 19 in the grain bag 15 at the appropriate timing until the bag mouth 15a is closed after completion | finish of measurement bag packing. After the bag mouth 15a is closed, as shown in FIG. 5, it can be easily transported to the car as it is, if the airframe is brought close to the car bed 50 and the start switch 47 is turned on again. The upper surface of the elevating table 6 can be raised to the height of the upper surface of the loading platform 50 and automatically stopped. Therefore, the grain bag 15 can be easily moved from the lifting table 6 to the loading platform 50, and the burden on the operator can be remarkably reduced. In the present embodiment, the upper limit switch 38 is adjusted as a method of stopping the lifting table 6 at the height of the loading platform 50.
In addition, when the transporting distance of the lifting device is long, work efficiency can be improved by using a plurality of lifting devices with platform scales while rotating them.

  In the best mode of the present invention, the mobile lift 7 is described in which the platform balance 7 is mounted on the base 3 and the goods can be weighed and transported. However, the present invention is not limited to the mobile lift, It can also be applied to a stationary lifting device. That is, if the lifting / lowering body 5 is lowered together with the lifting / lowering table 6 and the lifting / lowering table 6 is placed on the platform scale 7 positioned below the lifting / lowering table 6, the engagement of the support body 8 is released and the weighing becomes possible. If the lifting / lowering body 5 is raised after the measurement is completed, the lifting / lowering body 5 and the lifting / lowering table 6 are again engaged with each other by the support body 8, and the article on the lifting / lowering table 6 can be raised to a predetermined height. The article can be carried out in an easy posture that does not require the person to bend.

The movable lifting and lowering device configured to be movable by providing the front and rear wheels 1 and 2 on the base 3 of the present invention is also applied to a form in which the platform scale 7 is placed on the ground below the supply port of the conventionally known supply device 10. be able to. That is, if the lifting table 6 is moved together with the machine body to a position below the supply port and above the platform scale 7, the lifting table 6 is lowered at this position, and the lifting table 6 is placed on the platform scale 7 in contact with it. The support body 8 is disengaged and measurement is possible. When the lifting body 5 is raised after the end of the weighing, the lifting body 5 and the lifting table 6 are again engaged by the support body 8, and the lifting table 6. The upper article can be raised to a predetermined height. In this case, since the supply port is located above the lift table 6, the lift table 6 is raised to a height at which the article and the supply port do not come in contact with each other and a height at which the lift table 6 is separated from the platform scale 7. It is only necessary to move the machine body so that there is no obstacle above the lift table 6 and the article, and then lift the lift table 6 again to a predetermined height.
Therefore, it is applicable to a conventionally known vertical grain sorting and weighing machine, and it is not necessary to provide the platform balance 7 in the lifting device, and an inexpensive lifting device can be provided. In particular, the vertical grain sorting and weighing machine continuously sorts the grains, and the next empty grain bag immediately after the shutter 18 of the supply port is closed and the weighed grain bag 15 is taken out from the platform balance 7. 15 is placed on the platform balance 7, the shutter 18 is opened again, and during the weighing, the previously weighed grain bag 15 is transported, so that the weighing is carried out while being rotated by a plurality of lifting devices. The work efficiency is also good. At that time, it is possible to provide the lifting device at a lower cost than mounting the platform balance 7 on each of the plurality of lifting devices, and the lifting device can be reduced in weight by the absence of the platform balance 7, so that light transportation work can be performed. Can do.

Partial side view Front view Partial cutaway side view of the main part Side view showing the mode of weighing work from a vertical grain sorter Working state diagram showing loading into the car carrier

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front wheel 2 Rear wheel 3 Base 4 Strut 5 Lifting body 6 Lifting table 7 Platform scale 8 Support body 9 Impact mitigation means 10 Supply apparatus (vertical grain sorter)
11 Control means

Claims (5)

  In a lifting device provided with a lifting and lowering body (5) that can be lifted and lowered along a column (4) erected from a base (3), and having a lifting table (6) for placing an article in front of the lifting and lowering body (5), The lifting body (5) and the lifting table (6) are engaged via the support body (8), and the lifting table (6) is lowered onto the platform scale (7) located below the lifting table (6). Then, when the lifter (5) is further lowered, the support (8) is disengaged and the lifter table (6) and the lifter ( 5) and a lifting device that is separated into a non-contact state.   The lifting device according to claim 1, wherein the lifting device (6) on the platform scale (7) is capable of weighing on the condition that the lifting table (6) is not in contact with the lifting body (5).   The elevating device according to claim 1 or 2, further comprising impact mitigating means (9) for mitigating an impact on the platform scale (7) when the elevating table (6) is placed on the platform scale (7).   The platform scale (7) located below the lifting table (6) is placed on the base (3), the front wheel (1) and the rear wheel (2) are provided before and after the base (3), and the platform scale (7) is mounted. The lifting device according to any one of claims 1 to 3, wherein the lifting device is configured to be movable together with the base (3).   A supply device (10) that fills the container (11) such as a bag or a container placed on the lifting table (6) with a grain or the like is provided, and the supply is performed according to the weight detection value (A) of the platform scale (7). 5. Elevating device according to claim 4, comprising control means (11) capable of controlling the supply amount (B) of the device (10).

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