JP4347310B2 - Fork swivel automatic lifting device - Google Patents

Description

The present invention relates to a fork swivel type automatic hanging tool used for paying out and loading a long transported product stacked through a dunnage.

Conventionally, long transported goods stacked via a dunnage, for example, H-shaped steel, rails, pipes, etc. are discharged from the storage place, and used to load the transported goods into the storage place via the dunnage. As a fork turning type automatic hanging tool, for example, the one described in Patent Document 1 is known. This fork swivel type automatic lifting device has a pair of intermediate frames that can move along a suspension beam that is horizontally suspended by a crane, and is supported at the bottom of each intermediate frame so as to be able to swivel horizontally. The lower suspension frame is provided with a two-point support fork member. The fork member has a base end fixed at one end in the longitudinal direction of the lower suspension frame, a long hole formed vertically at the distal end, and is formed at the distal end of the lifting rod that moves up and down at the other longitudinal end of the lower suspension frame. The lifting / lowering rod is hooked on the fork member by inserting and turning the hook thus formed into the elongated hole of the fork member. The elevating rod is rotated by a rotating motor provided at the upper end of the elevating rod, and the elevating rod is provided vertically on the lower suspension frame and is moved up and down by a screw jack driven by the elevating motor. It has become.

Utility Model Registration No. 2579550 (FIGS. 2 to 4)

However, in the conventional fork swivel type automatic lifting device, since the screw jack for raising and lowering the lifting rod is provided on the lower suspension frame, it is necessary to increase the distance between the suspension beam and the lower suspension frame. As a result, the apparatus becomes large and heavy, and the handling property is inferior.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a fork swivel type automatic suspension that can make the apparatus compact and lightweight and has improved handling properties.

A fork swivel type automatic suspension device according to the present invention that meets the above-mentioned object is a suspension beam suspended by a lifting machine, and a lower suspension frame attached to both sides of the suspension beam so as to be horizontally pivotable via intermediate frames, A fork member whose base side is fixed to a support member that is suspended from one side of each lower suspension frame, and a front side of the fork member that is provided on the other side of the lower suspension frame can be removed. Fork swivel type automatic hanging device having a latching device supported by
The latching device is provided on a lower end frame with a latching piece inserted into a long hole formed on the front side of the fork member, and on the lower suspension frame, and guides the lifting of the lifting rod. A guide member that is provided on the lower suspension frame, and a rod elevating means that moves the elevating rod up and down by a rack and pinion mechanism; and a latching piece of the elevating rod is latched from the latching position with respect to the elongated hole. to the release position it has a rod rotating means for rotating,
The rod lifting means is provided along the axis of the lifting rod on the lower side of the lifting rod, and is a planar rack arranged so that the tooth tip fits within the outer diameter of the lifting rod in plan view, An arc rack connected to the upper end of the planar rack and provided along the axis of the lifting rod and having a reference pitch line having the same radius as the distance from the center of rotation of the planar rack to the reference pitch line in plan view And
The rod rotating means is provided concentrically with the lifting rod on the lower suspension frame, a load receiving member attached to the upper end of the lifting rod, a claw member suspended from the load receiving member, and A ring-shaped rod that rotates horizontally with the load receiving member being placed at the lower limit position of the elevating rod and the hook member being inserted in the vertical direction and capable of engaging in the horizontal direction. that it has a pivot bracket.

In the fork swing type automatic hanging tool according to the present invention, the intermediate frames may advance and retract in synchronization with each other so that the span between the fork members can be adjusted.

In the fork swivel type automatic lifting device according to claim 1 or 2 , since the vertical movement of the lifting rod is not performed by a screw jack as in the prior art but by a rack and pinion mechanism provided in the lower suspension frame, The distance from the suspension frame can be made small, which makes it possible to reduce the size and weight of the apparatus and improve handling.

The rod elevating means includes a flat rack arranged so that the tooth tip is within the outer diameter of the elevating rod and an arc rack provided to be connected to the upper end of the flat rack. A latching portion in which a load receiving member attached to the upper end is placed at the lower limit position of the lifting rod, and a hook member suspended from the load receiving member can be inserted vertically and hooked horizontally. Since the ring-shaped rod rotating metal fitting that rotates horizontally is formed, the latching device can be configured to be compact and lightweight.

In the fork swivel type automatic suspension tool according to the second aspect , the intermediate frames advance and retreat in synchronization with each other, and the span between the fork members can be adjusted. Therefore, it is possible to handle transported objects having different lengths.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is an explanatory view showing a use state of a fork swing type automatic hanging device according to an embodiment of the present invention, FIG. 2 is a configuration diagram of a latching device of the fork swing type automatic lifting device, and FIG. FIGS. 4A and 4B are respectively a plan view and a side view illustrating the rack and pinion mechanism of the latching device, and FIGS. 4A and 4B are respectively latched and unlocked by the latching device. It is explanatory drawing which looked at the top view shown and the side view.

As shown in FIGS. 1 and 2, a fork-swivel automatic suspension 10 according to an embodiment of the present invention is suspended by a traversing carriage 12 of a traveling crane 11 that is an example of a lifting machine and can move up and down. A suspension beam 13 and a lower portion attached to both sides in the longitudinal direction of the suspension beam 13 so as to be capable of horizontal swiveling via intermediate frames 14 and 15 that can be moved back and forth in synchronization with each other along the longitudinal direction of the suspension beam 13. Suspension frames 16, 17, fork members 20, 21 whose base sides are fixed to support members 18, 19 provided on one side of the lower suspension frames 16, 17; 17 is provided with latching devices 22 and 23 that are provided on the other side of 17 and removably support the front sides of the fork members 20 and 21.

The fork swivel type automatic lifting device 10 lifts and discharges a long transported object 25 stacked in a storage area via a dunnage 24, and stacks the suspended transport object 25 in a storage area via a dunnage 24. It is a hanging tool used to do.
The lower suspension frame 16, the support member 18, the fork member 20, and the hooking device 22 provided on one side in the longitudinal direction of the suspension beam 13 are the lower suspension frame 17 provided on the other side in the longitudinal direction of the suspension beam 13, The support member 19, the fork member 21, and the latching device 23 have the same structure. Therefore, the lower suspension frame 16, the support member 18, the fork member 20, the latching device 22, and the like will be described in detail below.

As shown in FIG. 2, the latching device 22 (23 is the same) includes an oblong-shaped latching piece 27 that latches in a long hole 26 formed on the front side of the fork member 20 at the lower end. Guide members 29 and 30 which are arranged at intervals above and below a lifting rod 28 and a cylindrical bearing bracket 28a provided on the lower suspension frame 16 to guide the lifting and lowering of the lifting rod 28, and a lower suspension frame. 16 and a rod lifting / lowering means 31 that moves the lifting / lowering rod 28 up and down by a rack and pinion mechanism, and a latching piece 27 of the lifting / lowering rod 28 from the latching position to the latching release position (or the latching position). Rod rotating means 32 for rotating from the stop release position to the latch position.

As shown in FIG. 2 (showing the state of the latch release position) and FIGS. 3A and 3B (showing the state of the latch position), the rod lifting / lowering means 31 moves up and down below the lifting rod 28. A plane provided along the axial center of the rod 28 and arranged so that the tooth tip 33 fits within the outer diameter D (for example, 50 to 120 mm, 80 mm in the present embodiment) of the lifting rod 28 in plan view. The rack 34 is connected to the upper end 35 of the flat rack 34 and is provided along the axis of the lifting rod 28. The reference pitch line 36 extends from the rotation center O of the flat rack 34 (same as the lifting rod 28) in plan view. And an arc rack 38 having a reference pitch line 37 having the same radius R as the distance K (for example, 30 to 90 mm and 64 mm in the present embodiment). The flat rack 34 and the arc rack 38 are configured to mesh with a pinion 43 provided on the lower suspension frame 16, and the rack and pinion mechanism includes the pinion 43, the flat rack 34, and the arc rack 38.

The arc rack 38 having the reference pitch line 37 is formed about half (180 degrees) in the circumferential direction, and the lifting rod 28 is rotatable about 90 degrees with respect to the pinion 43. The outer diameter (tooth tip circle diameter) d of the portion including the arc rack 38 is, for example, 30 to 90 mm, 64 mm in the present embodiment, and the width h of the pinion 43 is, for example, 20 to 60 mm. In the form of 34 mm.

2, 3 (A), (B) and FIGS. 4 (A), (B), the rod rotation means 32 has an outer diameter G larger than the outer diameter D of the lifting rod 28, A disc-shaped load receiving member 39 attached to the upper end of the elevating rod 28, a claw member 40 having a rectangular cross section provided hanging from the load receiving member 39, and the elevating rod 28 concentrically with the lower suspension frame 16. The load receiving member 39 is placed at the lower limit position of the elevating rod 28 (shown by the broken line in FIG. 4B), and the claw member 40 can be inserted in the vertical direction to engage in the horizontal direction. A hooking portion 41 having a concave cross section is formed, and an outer diameter for horizontal rotation is g (g> G) and a ring plate-shaped rod rotation metal fitting 42 is provided.

2 and 3B, at the lower limit position of the lifting / lowering rod 28, the lifting / lowering rod 28 between the cylindrical guide members 29 and 30 provided perpendicular to the bearing bracket 28a has an arc rack 38. Opposite truncated conical portions 44 and 45 are formed on the top and bottom of the throttle portion, that is, the portion including the circular arc rack 38 having a circular cross section so that it can be rotated about 90 degrees while avoiding interference with the meshing pinion 43. Yes. A flat rack 34 is detachably attached to a recess 46 formed in a C-shaped cross section by a screw fastening mechanism on the lifting rod 28 below the arc rack 38 including the truncated cone part 45. The modules M of the pinion 43, the arc rack 38, and the flat rack 34 are 3 to 8 (M = 5 in this embodiment).

The pinion 43 is rotationally driven by an electric motor 47 with a speed reducer provided on the other side of the lower suspension frame 16 via a mounting bracket (not shown). A torque limiter (not shown) is provided between the output shaft of the electric motor 47 and the pinion 43 in order to prevent damage to the pinion 43, the flat rack 34, and the arc rack 38 due to overload. With this configuration, when the latching piece 27 of the lifting rod 28 is in the latching release position, the pinion 43 is rotated by driving the electric motor 47, and the lifting rod 28 is moved up and down via the flat rack 34 and the arc rack 38. Can move.

As shown in FIG. 2, the latching piece 27 at the lower end of the elevating rod 28 is formed in an oval shape so as to contact the lower surface around the long hole 26 of the fork member 20 at the latching position. In the center of the upper surface of the latching piece 27, a rod-shaped connecting fitting that can be inserted into the elongated hole 26 and can be rotated in the elongated hole 26, and the upper part is attached to the lower end of the lifting rod 28 by a screw fastening mechanism. 48 is erected integrally. With this screw fastening mechanism, it is possible to adjust the position in the height direction of the hooking piece 27 with respect to the fork member 20 in consideration of manufacturing error, assembly error, bending of the fork member 20, and the like. The connection fitting 48 positioned on the elevating rod 28 is fixed to the elevating rod 28 via a ring plate-like detent fitting 49 having an internal thread formed on the inner peripheral portion. The raising / lowering stroke P of the raising / lowering rod 28 is 500-1500 mm, for example, and is 850 mm in this Embodiment.

As shown in FIGS. 2 and 4B, a load receiving thrust ball bearing 50 is horizontally provided at the upper end of the upper guide member 29, and slides on the inner peripheral surface of the load receiving thrust ball bearing 50. Thus, the elevating rod 28 is arranged so as to be movable up and down. On the upper surface of the load receiving thrust ball bearing 50, the rod rotating metal fitting 42 described above is disposed. A ring-shaped chain sprocket 51 is horizontally provided on the outer peripheral surface of the rod rotating bracket 42, and an electric motor with a reduction gear is provided vertically on the lower suspension frame 16 via a mounting bracket (not shown). An endless chain 55 is provided on the chain sprocket 54 and the chain sprocket 51 that are horizontally attached to the output shaft 52 via a torque limiter 53. The torque limiter 53 is provided to prevent damage to the endless chain 55 and the like due to overload.

With such a configuration, the load receiving member 39 is placed on the rod rotating bracket 42 at the lower limit position of the lifting rod 28, and the endless chain is driven by driving the electric motor 52 in a state where the claw member 40 is engaged with the engaging portion 41. The lifting rod 28 can be rotated in the guide members 29 and 30 via the rod 55 and the rod rotating bracket 42, whereby the latching piece 27 of the lifting rod 28 is latched with respect to the long hole 26. It can be rotated about 90 degrees from the position to the latch release position (or from the latch release position to the latch position).

As shown in FIG. 2, a rod cover 56 having a rectangular cross section that covers the upper side of the lifting rod 28 that moves up and down is vertically provided on the lower suspension frame 16.
On the upper surface of the load receiving member 39 of the elevating rod 28, a rod-like striker 57 having a rectangular cross section is attached horizontally.
As shown in FIGS. 2, 4 (A), and 4 (B), an upper limit stop sensor 58 that is actuated by a striker 57 at the ascending position of the elevating rod 28 where the latching piece 27 is in the latch release position is the upper end of the rod cover 56 Further, a lower limit deceleration sensor 59 and a lower limit stop sensor 60 that are operated by the striker 57 at the lowered position are respectively attached to the lower end portion of the rod cover 56. In order to prevent the lifting rod 28 from rotating when the lifting rod 28 is raised and lowered, a guide member 40 a for guiding the raising and lowering of the claw member 40 is vertically attached to the rod cover 56.

As shown in FIGS. 4 (A) and 4 (B), at the lower limit position of the lifting rod 28, the rod latch release sensor 61 that detects the latch release position by detecting the latch release position by detecting the latch release position is detected. A rod latching sensor 62 is attached to the lower end of the rod cover 56.

Next, a method for using and a function (or operation) of the fork turning type automatic hanging tool 10 according to the embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a long transported object 25 stacked in a perpendicular manner with respect to the traveling direction of the traveling crane 11 via the dunnage 24 is dispensed, and the transported object 25 is transferred via the dunnage 24 in another place. The case of loading will be described.

By driving the electric motor 47, as shown by a two-dot chain line in FIG. 2, the latching piece 27 of the elevating rod 28 is raised to the upper position with respect to the fork member 20 and is suspended by the traversing carriage 12. The suspension beam 13 is also set to the upper limit position.
As shown in FIG. 1, in consideration of the position of the dunnage 24 and the length of the transported object 25, the fork members 20 and 21 that are paired by advancing and retreating the intermediate frames 14 and 15 provided on the suspension beam 13 face each other. Adjust the span. Further, since the fork members 20 and 21 are inserted between the transported objects 25 arranged at intervals in the traveling direction of the traveling crane 11 by turning the lower suspension frames 16 and 17, the longitudinal direction of the suspension beam 13 ( The lower suspension frames 16 and 17 are arranged so that the fork members 20 and 21 face in the direction perpendicular to the traveling direction of the traveling crane 11.

The traveling crane 11 is caused to travel, the traversing carriage 12 is traversed, and the suspension beam 13 is planarly positioned with respect to the transport object 25 to be transported. 10 is lowered so that the fork members 20 and 21 are positioned at the height position of the space S formed by the dunnage 24 arranged at the lower end of the conveyed product 25.
A position in which the lower suspension frames 16 and 17 are horizontally turned about 90 degrees through the intermediate frames 14 and 15 so that the fork members 20 and 21 can place the object 25 and the lifting rod 28 can be lowered to the lower limit position. The fork members 20 and 21 are inserted into the space S so that

The elevating rod 28 is lowered by driving the electric motor 47 (the lowering speed is, for example, 50 to 150 mm / second, and in this embodiment, about 100 mm / second), and the lower limit deceleration sensor 59 detects the lower limit deceleration position. The speed of the lifting rod 28 is reduced, and then the lower limit position is detected by the lower limit stop sensor 60 to stop the lifting rod 28. At this time, at the latch release position of the lifting rod 28, as shown in FIG. 2, the latch piece 27 and the lower part of the connection fitting 48 are inserted into the long holes 26 of the fork members 20 and 21, and FIG. , (B), the load receiving member 39 of the elevating rod 28 is placed on the rod rotating metal fitting 42, and the claw member 40 is engaged with the engaging portion 41 of the rod rotating metal fitting 42. Further, the pinion 43 is in mesh with the arc rack 38.

The electric motor 52 is driven, and as shown in FIGS. 3 (A), 3 (B) and FIGS. 4 (A), (B), the latching piece 27 of the elevating rod 28 is inserted into the long hole 26 of the fork members 20, 21. Is rotated about 90 degrees from the latch release position to the latch position (rotation speed is 5 to 15 rpm, for example, about 8 rpm in this embodiment), and the elevating rod 28 is moved to the fork members 20 and 21. Hang on. At this time, the arc rack 38 formed on the elevating rod 28 rotates while sliding while being engaged with the pinion 43. The latch position detection sensor blinks the latch completion display lamp of the latch piece 27 so that the operator can check it. This display is interlocked so that the lifting operation of the overhead crane (traveling crane) can be performed after the left and right forks are completely hooked, and safety measures are taken.
Thereafter, the suspension beam 13 is lifted by the traversing carriage 12 and the transport object 25 is lifted to a predetermined height with both ends of the transport object 25 being placed on the fork members 20 and 21, and then the traveling crane 11 is traveled. At the same time, the traversing cart 12 is traversed and conveyed to a predetermined loading place.

At this time, since the elevating rod 28 is hooked on the fork members 20 and 21, the fork members 20 and 21 fixed to the support members 18 and 19 are horizontally supported by the lower suspension frames 16 and 17 at two points. Thus, the stress generated when the transported object 25 is placed can be reduced, and the transported object 25 can be reliably prevented from being detached from the fork members 20 and 21, which is safe.

At the loading place, after the suspended beam 13 is lowered and the transported object 25 is placed on the dunnage 24, the electric motor 52 is driven, and FIGS. 3 (A), 3 (B) and 4 (A), ( As shown in B), the latching piece 27 of the lifting rod 28 is rotated about 90 degrees from the latching position to the latching release position with respect to the long hole 26 of the fork members 20, 21, so that the lifting rod 28 and the fork member are The latch with 20, 21 is released. At this time, the arc rack 38 formed on the elevating rod 28 rotates while sliding while being engaged with the pinion 43. While the lifting rod 28 is rotating, the control device (brake) of the lifting motor is released to eliminate friction of the sliding portion so that the lifting rod 28 can rotate smoothly. At this latch release position, the claw member 40 of the elevating rod 28 is movable upward in the vertical direction with respect to the latching portion 41 of the rod rotating bracket 42.

The electric motor 47 is driven to raise the lifting rod 28 by the rack and pinion mechanism, and the upper limit stop sensor 58 is activated to stop the lifting rod 28. An empty fork member 20 provided on the lower suspension frames 16 and 17 through the intermediate frames 14 and 15 to a planar position where the fork members 20 and 21 are removed from the transported object 25 placed on the dunnage 24. After horizontally turning 21 by about 90 degrees and raising the suspension beam 13, the traveling crane 11 and the traversing carriage 12 are traversed to the place where the stacked transported object 25 is lifted again.

The present invention is not limited to the above-described embodiments, and can be changed without departing from the gist of the present invention. For example, some or all of the above-described embodiments and modifications are included. The case where the fork swivel type automatic suspension device of the present invention is configured in combination is also included in the scope of the right of the present invention.

Two guide members for guiding the lifting and lowering of the lifting rod are provided on the upper and lower sides of the bearing bracket. However, the guide member is not limited to this, and if necessary, one guide member with a portion that interferes with the pinion is cut off. It can also be provided.
The intermediate frames are moved forward and backward in synchronization with each other, and the span between the respective fork members can be adjusted. However, the present invention is not limited to this, and for example, the length of the conveyed object and the position of the dunnage can be set as necessary. If fixed, the intermediate frame can be fixed to the suspension beam.
Although the traversing cart is provided in the crane, the traversing cart is not limited thereto, and may be omitted as necessary.

It is explanatory drawing which shows the use condition of the fork rotation type automatic hanging tool which concerns on one embodiment of this invention. It is a block diagram of the latching device of the fork turning type automatic hanging tool. (A), (B) is explanatory drawing which looked at the planar view and side view which respectively show the rack and pinion mechanism of a latching device. (A), (B) is explanatory drawing which carried out the planar view and the side view which respectively show latching by latching device and latch release.

10: Fork swivel type automatic lifting device, 11: Traveling crane (lifter), 12: Traverse carriage, 13: Hanging beam, 14, 15: Intermediate frame, 16, 17: Lower hanging frame, 18, 19: Support member, 20, 21: Fork member, 22, 23: Latching device, 24: Dunnage, 25: Transported object, 26: Long hole, 27: Latching piece, 28: Lifting rod, 28a: Bearing bracket, 29, 30: Guide Member: 31: Rod lifting means, 32: Rod rotating means, 33: Tooth tip, 34: Flat rack, 35: Upper end, 36: Reference pitch line, 37: Reference pitch line, 38: Arc rack, 39: Load receiver Member: 40: claw member, 40a: guide member, 41: engagement portion, 42: rod rotation fitting, 43: pinion, 44, 45: truncated cone portion, 46: recess, 47: electric motor, 48: connection fitting, 49 Non-rotating bracket, 50: Load receiving thrust ball bearing, 51: Chain sprocket, 52: Electric motor, 53: Torque limiter, 54: Chain sprocket, 55: Endless chain, 56: Rod cover, 57: Striker, 58: Upper limit stop Sensor: 59: Lower limit deceleration sensor, 60: Lower limit stop sensor, 61: Rod latch release sensor, 62: Rod latch sensor

Claims (2)

A suspension beam suspended by a lifting machine, a lower suspension frame attached to both sides of the suspension beam via an intermediate frame so as to be horizontally pivotable, and suspended from one side of each lower suspension frame A fork swivel type automatic lifting device comprising: a fork member whose base side is fixed to a support member; and a hooking device that is provided on the other side of the lower suspension frame and removably supports the front side of the fork member ,
The latching device is provided on a lower end frame with a latching piece inserted into a long hole formed on the front side of the fork member, and on the lower suspension frame, and guides the lifting of the lifting rod. A guide member that is provided on the lower suspension frame, and a rod elevating means that moves the elevating rod up and down by a rack and pinion mechanism; and a latching piece of the elevating rod is latched from the latching position with respect to the elongated hole. to the release position it has a rod rotating means for rotating,
The rod lifting means is provided along the axis of the lifting rod on the lower side of the lifting rod, and is a planar rack arranged so that the tooth tip fits within the outer diameter of the lifting rod in plan view, An arc rack connected to the upper end of the planar rack and provided along the axis of the lifting rod and having a reference pitch line having the same radius as the distance from the center of rotation of the planar rack to the reference pitch line in plan view And
The rod rotating means is provided concentrically with the lifting rod on the lower suspension frame, a load receiving member attached to the upper end of the lifting rod, a claw member suspended from the load receiving member, and A ring-shaped rod that rotates horizontally with the load receiving member being placed at the lower limit position of the elevating rod and the hook member being inserted in the vertical direction and capable of engaging in the horizontal direction. A fork swivel type automatic hanging device comprising a rotating metal fitting . 2. The fork swivel type automatic hanging tool according to claim 1 , wherein the intermediate frames advance and retract in synchronization with each other so that the span between the fork members can be adjusted.

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