JP2014019561A - Glove bucket device, and working carriage having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glove bucket device and a working carriage having the same, usable for collecting unnecessary matter such as indoor debris and refuse, and capable of opening-closing a pair of buckets, without maximally changing a vertical directional position, without complicating both a structure and control.SOLUTION: A working carriage comprises: a baseplate 13; a motor 23 fixed on the baseplate 13; a column 11 positioned above the baseplate 13; a lifting mechanism for moving the baseplate 13 in an axial direction of the column 11 by output of the motor 23; a pair of buckets 21 and 21 for opening-closing under the baseplate 13; and a bucket driving mechanism for allowing the buckets 21 and 21 to execute opening-closing operation by output of the motor 23, and the lifting mechanism simultaneously operates with the bucket driving mechanism by the output of the motor 23, and moves the baseplate 13 for restraining a vertical directional positional change in respective bucket tip parts of the buckets 21 and 21 for mutually approaching-separating by the bucket driving mechanism.

Description

  The present invention relates to a grab bucket device used in the field of cargo handling work and waste disposal work, and a work cart equipped with the same, and in particular, a grab bucket suitable for use in collecting unnecessary materials such as scattered debris and garbage. The present invention relates to a device and a work carriage provided with the device.

  Conventionally, as a grab bucket apparatus as described above, there is one described in Patent Document 1, for example.

  This grab bucket device is a so-called double rope type grab bucket device, an upper frame suspended from a crane, a rail case connected to the upper frame by a pair of left and right rod frames, and the rail case approaching each other. A pair of shells (buckets) arranged in a separable manner, a lower frame that is arranged between the upper frame and the rail case, and moves up and down by raising and lowering the opening and closing rope on the crane side, and intersects between the lower frame and the pair of shells And a pair of open / close arms that are arranged and pivotally supported by both the lower frame and the pair of shells.

  In this grab bucket device, the lower frame is moved up and down by winding and unwinding the opening and closing rope, and the lifting and lowering operation of the lower frame is transmitted to the pair of shells via the pair of opening and closing arms. The approaching / separating operation above is performed.

  Conventionally, in addition to such a multi-line type grab bucket device, a hydraulic pump that opens and closes a pair of shells and a hydraulic grab bucket device that has a piping system for driving the hydraulic pump are known. Yes.

JP 2012-121673 A

  In the grab bucket apparatus described above, it can be used outdoors or in a dedicated facility by hanging it on a crane or attaching it to the tip of a robot arm. When collecting unwanted debris such as scattered rubble and debris by remote control, when the pair of buckets is opened and closed, the height of the pair of buckets is set according to the opening / closing angle so that they do not move up and down as much as possible. Control is required.

  The double rope type grab bucket device can control the height according to this opening and closing angle, but for the convenience of hanging on a crane, it is used for collecting unnecessary items indoors in most cases. Even if it can not be used, for example, it is necessary to use a plurality of drums for winding and unwinding the rope, which complicates the device structure.

  On the other hand, the hydraulic grab bucket device that is attached to the tip of the arm of a work robot that is remotely operated requires a hydraulic pump, a piping system and a power supply system for driving the hydraulic pump, and the control is complicated. Therefore, it has the problem that it is difficult to use it for collecting unneeded items indoors, as with the double cable type grab bucket device, and solving these problems has become a conventional problem. It was.

  The present invention has been made by paying attention to the above-described conventional problems, and can be used, for example, for the collection of unnecessary materials such as rubble and garbage indoors where access is restricted, and both the structure and the control are complicated. An object of the present invention is to provide a grab bucket device that can open and close a pair of buckets without changing the position in the vertical direction as much as possible, and a work carriage equipped with the grab bucket device.

  A grab bucket device according to a first aspect of the present invention includes a base plate, a motor fixed on the base plate, a support column in a direction perpendicular to the base plate located above the base plate, and an output of the motor. An elevating mechanism for moving the base plate in the axial direction of the support column, a pair of buckets attached to the base plate for opening and closing below the base plate, and an opening / closing operation for the pair of buckets by the output of the motor The lifting mechanism is operated simultaneously with the bucket driving mechanism by the output of the motor, and the vertical direction of each bucket front end portion of the pair of buckets approaching and separating from each other by the operation of the bucket driving mechanism. In order to suppress the position change of the base plate And characterized in that the arrangement is moved in the axial direction of the column, and a means for solving the conventional problems described above the grab bucket device of this configuration.

  In the grab bucket device according to claim 2 of the present invention, the lifting mechanism and the bucket driving mechanism are both feed screw mechanisms.

  The grab bucket device according to claim 3 of the present invention is configured such that the support column is provided with a misalignment absorbing mechanism that absorbs a change in position in the vertical direction of each bucket leading end accompanying opening and closing operations of the pair of buckets. Yes.

  On the other hand, the work cart according to claim 4 of the present invention includes a cart body, a support tower installed on the carriage body, and an arm that is selectively attached to the support tower and rotates around the support tower. Alternatively, a hoist rail is provided, and the arm can be rotated about a horizontal axis with respect to the arm while holding the column in the grab bucket device according to any one of claims 1 to 3 in a vertical direction. A bucket holding arm portion connected to the hoist rail is provided, and the hoist rail is supported on the hoist rail while holding the column in the grab bucket device according to any one of claims 1 to 3 in a vertical direction. On the other hand, it is set as the structure provided with the hoist supported so that driving | running | working was possible.

  In the grab bucket device according to the present invention, when the bucket drive mechanism is operated by the output of the motor to cause the pair of buckets in the open state to be closed, the lifting mechanism is operated at the same time to move the base plate in the axial direction of the column. Therefore, the movement of the bucket drive mechanism suppresses the vertical movement of each bucket tip in a pair of buckets that are close to each other. For example, there is almost no leakage of unnecessary materials such as rubble and garbage. It can be recovered.

  As described above, in the grab bucket device according to the present invention, the lifting mechanism and the bucket driving mechanism that operate with the output of one motor are used to open and close the pair of buckets and to control the height of the bucket tip. Therefore, it will be smaller and lighter than double grab bucket devices and hydraulic grab bucket devices. For example, in a narrow and restricted working environment, unnecessary items such as debris and garbage It can be recovered and removed without leaving any excess.

  At this time, when a feed screw mechanism is employed for the lifting mechanism and the bucket driving mechanism, a large reduction ratio is obtained, and a further reduction in size and weight is achieved.

  In addition, by providing a post with a misalignment absorbing mechanism that absorbs the vertical position change of each bucket tip associated with the opening and closing operation of a pair of buckets, there is almost no unrecovered waste remaining, and the grab bucket device For example, when attached to the arm of a robot, it is possible to avoid applying an excessive reaction force to the arm, and when the grab bucket device is suspended from a hoist, the suspension wire is prevented from bending. be able to.

  On the other hand, in the work cart according to the present invention, the grab bucket device according to the present invention is held to enter a narrow and restricted access work environment, so that unnecessary work such as debris and garbage can be collected and removed remotely. It can be performed by operation.

  Since the grab bucket device according to the present invention has the above-described configuration, it can be used, for example, for collecting unneeded items such as rubble and garbage indoors where entry is restricted. However, it is possible to open and close the pair of buckets while maintaining the position in the vertical direction substantially constant without increasing the complexity.

It is a whole perspective explanatory view of a work trolley which attached a grab bucket device concerning one embodiment of the present invention. It is longitudinal cross-sectional explanatory drawing (a) of the grab bucket of the grab bucket apparatus shown in FIG. 1, a side elevational view (b), and driving force transmission system explanatory drawing (c) of a raising / lowering mechanism and a bucket drive mechanism. It is locus | trajectory explanatory drawing of the bucket front-end | tip part at the time of the opening / closing operation | movement of the grab bucket of the grab bucket apparatus shown in FIG. It is a whole perspective explanatory view of a work trolley concerning other embodiments of the present invention.

Hereinafter, the present invention will be described with reference to the drawings.
1 to 3 show an embodiment of a grab bucket device according to the present invention. In this embodiment, a case where the grab bucket device is mounted on a work carriage and used will be described as an example.

  As shown in FIG. 1, the working carriage 1 includes a carriage body 2, a support tower 3 installed on the carriage body 2, and a control panel 4. An arm 5 or a hoist rail 6 described later is selectively attached to the support tower 3 so as to be detachable.

  The arm 5 includes a horizontal arm portion 5a that rotates about the support tower 3, a rotating arm portion 5b that is rotatably connected to the tip of the horizontal arm portion 5a about a horizontal axis, and the tip of the rotating arm portion 5b. The bucket arms 5c are connected to each other so as to be rotatable about a horizontal axis, and all of these arms 5a, 5b, 5c operate in response to a command from the control panel 4.

  As shown in FIGS. 2A and 2B, the grab bucket device 10 includes a column 11 attached to the bucket arm portion 5 c of the arm 5 via a reference flange 12, and a base plate 13 positioned below the column 11. A motor 23 fixed on the base plate 13, an elevating mechanism for moving the base plate 13 in the axial direction of the column 11 by the output of the motor 23, and the base plate 13 attached to the base plate 13 via connecting rods 22 and 22. A pair of buckets 21 and 21 that open and close below the base plate 13 and a bucket drive mechanism that causes the pair of buckets 21 and 21 to perform an opening and closing operation by the output of the motor 23 are provided.

  The elevating mechanism includes an elevating feed screw 14 fixed in the center at the lower end portion of the column 11, and an elevating nut 15 disposed on the base plate 13 via a bearing 15 a and screwed with the elevating feed screw 14. Yes.

  On the other hand, the bucket drive mechanism includes an opening / closing nut 18 disposed on the base plate 13 via a bearing 18a, and an opening / closing feed screw 17 into which the opening / closing nut 18 is screwed. The opening / closing feed screw 17 and the opening / closing nut 18 are respectively arranged on both sides of the support column 11, and the lower ends of the opening / closing feed screws 17, 17 are fixed to both ends of the connecting shaft 20 in the pair of buckets 21, 21. Has been.

  In this case, the lifting sprocket 16 is fixed to the lifting nut 15 of the lifting mechanism so as to be positioned below the base plate 13, while the opening / closing sprocket 19 is also positioned below the base plate 13. To be fixed.

  Then, the drive chain 25a is bridged between the output sprocket 24 fixed to the output shaft of the motor 23 and the transmission sprocket 26 arranged above the base plate 13, and as shown in FIG. The drive chain 25b is bridged between the transmission sprocket 27 disposed below the transmission sprocket 26 and coaxially fixed to the transmission sprocket 26, the elevating sprocket 16, and the opening and closing sprockets 19, 19. The elevating mechanism and the bucket driving mechanism are operated simultaneously by the output. In this embodiment, the raising / lowering feed screw 14 is in the relationship of an opening / closing feed screw 17 and a reverse screw.

  That is, when the motor 23 is operated, the elevating nut 15 is driven to move the base plate 13 up and down with respect to the support column 11, and at the same time, the open / close nut 18 is driven to open and close the feed screws 17 and 17 for the base plate 13. As a result, the pair of buckets 21 and 21 are opened and closed.

  At this time, as shown in FIG. 3, when the vertical stroke L2 of the open / close feed screws 17, 17 (the connecting shaft 20 of the buckets 21, 21) is set to an appropriate value with respect to the vertical movement stroke L1 of the base plate 13, The vertical position change L3 of each bucket tip in the pair of buckets 21 and 21 approaching and separating from each other by the operation of the bucket driving mechanism can be minimized.

  In addition, by providing a spring-type reaction force absorber (position displacement absorbing mechanism) 29 on the support 11, the vertical position change L 3 of the bucket tip is absorbed between the support 11 and the reference flange 12. Thus, an excessive reaction force is prevented from being applied to the bucket arm portion 5 c of the arm 5.

  2 is a detent pin, and this detent pin 28 penetrates the base plate 13 slidably. Further, when the above grab bucket device 10 is mounted on the work carriage 1 and actually performs debris processing, the upper and lower sides of the base plate 13 are covered with a cover 30 as shown in FIG. Therefore, it is desirable to protect internal mechanisms such as a feed screw mechanism.

  In the grab bucket device 10 according to the above-described embodiment, when the bucket drive mechanism is operated by the output of the motor 23 to cause the pair of buckets 21 and 21 in the open state to perform the closing operation, the lifting mechanism operates simultaneously with this. Since the base plate 13 is moved (raised) in the axial direction of the column 11, the vertical position change L3 of each bucket tip in the pair of buckets 21 and 21 approaching each other by the operation of the bucket drive mechanism is suppressed to a minimum. For example, unnecessary materials such as rubble and garbage can be collected almost without leakage.

  As described above, in the grab bucket device 10 according to this embodiment, the opening and closing mechanism and the bucket driving mechanism that operate with the output of one motor 23 are used to open and close the pair of buckets 21 and 21 and the height of the bucket tip. Since the control is performed, the size and weight can be reduced compared with the double-line type grab bucket device and the hydraulic grab bucket device. For example, in a narrow and restricted working environment, rubble It is possible to collect and remove unnecessary materials such as waste and garbage.

  Further, in the grab bucket device 10 according to this embodiment, a feed screw mechanism is employed for each of the lifting mechanism and the bucket driving mechanism, so that a further reduction in size and weight can be achieved as long as a large reduction ratio is obtained. It will be.

  Furthermore, in the grab bucket device 10 according to this embodiment, since the spring-type reaction force absorber 29 is provided on the support 11, there is almost no unrecovered unrecovered waste, and the bucket arm portion of the arm 5. It can be avoided that an excessive reaction force is applied to 5c.

  In the work cart 1 according to this embodiment, the grab bucket device 10 is held and entered into a narrow and restricted access environment, so that the unnecessary work such as debris and garbage can be collected and removed remotely. It can be performed by operation.

  In the above-described embodiment, the case where the grab bucket device 10 is attached to the work cart 1 via the arm 5 has been described as an example. However, the present invention is not limited to this. For example, as shown in FIG. You may attach to the support tower 3 of the main body 2 via the hoist apparatus 6 provided with the rotation support | pillar 6a, the rail 6b for hoists, the hoist 6c, and the hook 6d.

  The configuration of the grab bucket device and the work cart according to the present invention is not limited to the configuration of the above-described embodiment, and the support hand 3 of the work cart is connected to the suction part of the electric hand or the vacuum cleaner via the arm 5. It is possible to install a floor polisher.

DESCRIPTION OF SYMBOLS 1 Work trolley 2 Bogie main body 3 Support tower 5 Arm 5c Bucket arm part 6b Hoist rail 6c Hoist 10 Grab bucket device 11 Post 13 Base plate 14 Elevating feed screw (elevating mechanism)
15 Elevating nut (elevating mechanism)
16 Sprocket for lifting (lifting mechanism)
17 Open / close feed screw (bucket drive mechanism)
18 Nut for opening and closing (bucket drive mechanism)
19 Sprocket for opening and closing (bucket drive mechanism)
21 Pair of buckets 23 Motor 29 Spring-type reaction force absorber (position shift absorption mechanism)

Claims (4)

A base plate;
A motor fixed on the base plate;
A column in a direction perpendicular to the base plate located above the base plate;
An elevating mechanism that moves the base plate in the axial direction of the column with respect to the column by the output of the motor;
A pair of buckets attached to the base plate and opened and closed below the base plate;
A bucket drive mechanism for causing the pair of buckets to open and close by the output of the motor;
The elevating mechanism operates simultaneously with the bucket drive mechanism by the output of the motor, and suppresses the vertical position change of each bucket tip portion in the pair of buckets that approach and separate from each other by the operation of the bucket drive mechanism. The grab bucket device, wherein the base plate is moved in the axial direction of the support column.   The grab bucket device according to claim 1, wherein each of the elevating mechanism and the bucket driving mechanism is a feed screw mechanism.   The grab bucket device according to claim 1 or 2, wherein a positional deviation absorbing mechanism that absorbs a vertical position change of each bucket tip portion accompanying opening and closing operations of the pair of buckets is provided on the support column. The cart body,
A support tower installed on the bogie body;
An arm or hoist rail that is selectively mounted on the support tower and rotates around the support tower,
A bucket holding arm connected to the arm so as to be rotatable about a horizontal axis with respect to the arm while holding the column in the grab bucket device according to any one of claims 1 to 3 in a vertical direction. Are provided,
The hoist rail is provided with a hoist supported so as to be able to travel with respect to the hoist rail while holding the column in the grab bucket device according to any one of claims 1 to 3 in a vertical direction. A work cart characterized by

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