JPH0592894A - Shelf loading crane - Google Patents

Abstract

PURPOSE:To prevent a pallet elevating chain from colliding with the column of a travel frame and facilitate the tension adjustment of the pallet elevating chain. CONSTITUTION:The elevating pallet 1 of a shelf loading crane is provided with side part frame members 2 on both sides. A bearing member 3 protruding toward the relative side part frame member 2 is fixed to the side part frame member 2, and a pallet elevating chain 8 is suspended from the lower part of a support member 4 fittingly and elevatingly provided at the bearing member 3. This pallet elevating chain 8 is wound onto a lower guide sprocket fitted to a travel frame, the drive sprocket of an elevating drive unit and an upper guide sprocket in this order, and then connected to the side part frame member 2. A chain stretching compression spring 7 is interposed between the bearing member 3 and a chain tension adjusting nut 17 screwed with the upper part of the support member 4, and a space between a column and the pallet elevating chain 8 on the lower side of the elevating pallet 1 is set larger than a space between the column and the pallet elevating chain 8 on the upper side of the elevating pallet 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier platform chain hanging from a lifting carrier which collides with a column of a traveling frame when a shelving crane traveling with the lifting carrier placed in a raised position stops. The present invention relates to a shelving crane that can prevent noise from being generated.

[0002]

2. Description of the Related Art Conventionally, as a shelving crane, Japanese Patent Laid-Open No.
As disclosed in Japanese Patent Publication No. 294107, an upper guide sprocket in which one end of a carrier platform lifting chain is connected to upper portions of side frame members on both sides of the carrier platform, and the carrier platform lifting chain is attached to a traveling frame. And the drive sprocket of the lifting drive unit mounted on the traveling frame and the lower guide sprocket mounted on the traveling frame in order, and the other end of the loading platform lifting chain that stands up from the lower guide sprocket A structure that is connected to the lower part of the lifting platform via a spring, and a chain for lifting the platform on the upper side of the platform and a chain for lifting the platform on the lower side of the platform are arranged at equal intervals to the columns of the traveling frame. It has been known.

[0003]

In the case of the conventional shelving crane described above, the tension of the tension spring for tensioning the chain is such a small tension that does not cause slack in the chain for lifting the platform under the platform. Raise the lifting platform to a position near the upper limit to lengthen the loading platform lifting chain below the loading platform, and reduce the distance between the loading platform lifting chain and the props of the traveling frame. When the traveling is stopped, the carrier lifting / lowering chain below the lifting / lowering carrier may be flexed due to inertia and collide with the pillars of the traveling frame to generate noise. Also, since the end of the lifting / lowering platform on the lower side of the lifting platform is connected to the lifting platform via a tension spring for tensioning the chain, when the tension spring is disconnected, the lower platform for lifting the platform is lifted. The chain 8 falls, which is dangerous. Further, in the case of the conventional shelving crane, there is a drawback that the tension of the chain for lifting the platform cannot be adjusted.

[0004]

In order to advantageously solve the above problems, in the shelving crane of the first invention, side frame members fixed to both sides in the traveling direction of the crane in the lifting platform 1 of the shelving crane. 2, a supporting member 3 projecting toward the opposite side frame member 2 is fixed, and one end of a carrier platform lifting chain 8 is connected to a lower portion of a supporting member 4 fitted to the supporting member 3 so as to be able to move up and down. , A lower guide sprocket 10 attached to the lower part of a traveling frame 9 of a shelving crane, a drive sprocket 12 of a lifting drive device 11 attached to the traveling frame 9, and an upper portion of the traveling frame 9. The upper guide sprocket 13 attached is wound around one by one, and the end portion of the load platform lifting chain 8 hanging from the upper guide sprocket 13 is connected to the side frame member 2 to support the support member 4. The chain tension compression spring 7 is interposed between the chain tension adjusting nut 17 screwed on the upper part and the support member 3, and the load platform lifting chain 8 below the lift platform 1 and the prop of the traveling frame 9 are connected. The interval is made larger than the interval between the upper and lower loading platform lifting chains 8 of the lifting platform 1 and the columns of the traveling frame 9. Further, in the shelving crane of the second invention, the side frame members 2 fixed to both sides in the traveling direction of the crane in the lifting platform 1 of the shelving crane are provided with the support members 3 projecting toward the opposite side frame members 2. Fixed,
A chain tension sprocket 5 is rotatably attached to a lower portion of a support member 4 which is vertically movable fitted to the support member 3 by a horizontal shaft 6 perpendicular to the traveling direction of the crane, and one end of the side frame member 2 is attached. A chain 8 for lifting and lowering the connected platform is wound around the upper half of the sprocket 5 to hang it from the side opposite to the side frame member 2 of the sprocket 5, and then attached to the lower part of the traveling frame 9 of the shelving crane. The guide sprocket 10, the drive sprocket 12 of the lifting drive device 11 attached to the traveling frame 9, and the traveling frame 9
Is sequentially wound around the upper guide sprocket 13 attached to the upper part of the above, and the end portion of the loading platform lifting chain 8 hanging from the upper guide sprocket 13 is connected to the side frame member 2 and screwed onto the upper portion of the supporting member 4. The chain tension compression spring 7 is interposed between the chain tension adjusting nut 17 and the support member 3 and the space between the carrier lifting chain 8 below the lifting platform 1 and the props of the traveling frame 9 is raised and lowered. It is made larger than the distance between the upper and lower chains 8 for lifting the cargo bed 1 and the columns of the traveling frame 9.

[0005]

1 to 12 show a shelving crane according to an embodiment of the first invention, in which a hoisting and loading platform 1 of a shelving crane 14 has a loading platform 15 and both ends of the loading platform 15 in the traveling direction of the crane. Side frame members 2 fixed to the front and rear ends
And a supporting member 3 projecting toward the facing side frame member 2 at an intermediate portion in the height direction of each side frame member 2.
Is fixed to the supporting member 3, and a support member 4 is fitted in the support member 4 so as to be vertically movable and non-rotatable. One end of a carrier platform elevating chain 8 is connected to a lower portion of the supporting member 4 to support the carrier platform elevating chain. 8 hangs down through a guide member 19 fixed to the lower part of the side frame member 2, and then the loading platform lifting chain 8 is attached to the lower frame 20 of the traveling frame 9 of the stacking crane 14 at the lower part. A guide sprocket 10, a drive sprocket 12 of a lifting drive device 11 attached to a lower frame 20 of the traveling frame 9,
The upper guide sprocket 13 attached to the upper frame 21 of the traveling frame 9 is successively wound around the upper guide sprocket 13, and the screw rod 22 is connected to the end of the chain 8 for lifting the platform which is hung from the upper guide sprocket 13. A supporting metal fitting 23 fixed to an upper portion of the side frame member 2 is inserted, and a locking nut 24 is screwed to the screw rod 22 at a lower portion of the supporting metal fitting 23.

The carrier platform lifting chain 8 hanging from the support member 4 is arranged farther from the columns 25 and 26 of the traveling frame 9 than the carrier platform lifting chain 8 hanging from the upper guide sprocket 13. Lifting platform 1
Lower loading platform lifting chain 8 and traveling frame support 2
The distance D from the supporting members 4 and 5 and 26 is set to be larger than the distance d between the upper and lower loading platform chains 8 of the lifting platform 1 and the columns 25 and 26 of the traveling frame 9, and the male screw portion on the upper portion of the support member 4 is set. A chain tension compression spring 7 is interposed between the thread tension adjusting nut 17 and the support member 3 which are screwed together.

The side frame member 2 has side guide rollers 27 engaged with the left and right side surfaces of the columns 25, 26 of the traveling frame 9 and inner guide rollers engaged with side faces of the columns 25, 26 in the front-rear direction. 28 are attached and telescopic forks 29 extending in a direction (horizontal direction) at right angles to the traveling direction of the crane are fixed to both front and rear sides of the upper portion of the loading platform 15, and the telescopic forks 29 allow loads 30 to be stacked in a multi-tiered rack. It is carried in and out of (not shown).

The lower frame 20 of the traveling frame 9 is composed of an intermediate lower frame 31 and end lower frames 32 and 33 connected to both front and rear ends thereof. Side rollers 35 engaged with both side surfaces of the upper frame 34 are attached, and upper guide rails 36 are provided on both front and rear sides of the upper frame 21.
Upper guide rollers 37 that engage with both side surfaces of are attached.

On the upper part of the one end lower frame 32, an elevating and lowering drive device 11 comprising an electric motor 38 and a speed reducer 39.
Are fixed by bolts (not shown), and the electric motor 40 and the speed reducer 4 are provided on the side of the end lower frame 32.
A traveling drive device 42 composed of 1 is fixed by bolts (not shown), and traveling drive wheels 43 rotated by the traveling drive device 42 are rotatably attached to the lower end frame 32, The lower frame 3 at its end
A mounting end plate 45 having a plurality of through holes 44 is fixed to one end of the welding end 2 by welding, and an engaging member 46 projecting at a right angle to the surface of the mounting end plate 45 at the center of the upper end of the mounting end plate 45.
Are integrally provided, the end lower frame 32, the lifting drive device 11 and the traveling drive device 42 fixed to the end lower frame 32, and the engaging member 4 fixed to the end lower frame 32.
A mounting end plate 45 having 6 and a traveling drive wheel 43 rotatably attached to the lower end frame 32 constitute an elevating and traveling drive unit 47.

Bearing end plates 49 and 50 having a plurality of through holes 48 are fixed to both ends of the intermediate lower frame 31 by welding. Engagement member fitting recesses are formed in the upper center of the bearing end plates 49 and 50. 51 is provided. The mounting end plate 45 of the elevating and traveling drive unit 47 is overlapped with the supporting end plate 49 at one end of the intermediate lower frame 31, and the engaging member 46 of the mounting end plate 45 is fitted into the supporting member end plate 49. The mounting end plate 45 and the supporting end plate 49 are fitted and mounted in the recess 51 for mounting.
And are fastened and engaged by a plurality of bolts 52 inserted through the through holes 44 and 48.

A vertical mounting end plate 53 having a plurality of through holes is fixed to one end of the end lower frame 33 by welding.
An engaging member 46 is integrally provided on an upper portion of the mounting end plate 53, a control board 54 is fixed to an upper portion of the end lower frame 33 by a bolt (not shown), and the control plate 54 is attached to the end lower frame 33. The driven wheels 55 for traveling are rotatably attached. The mounting end plate 53 at one end of the lower end frame 33 is a support end plate 5 at the other end of the intermediate lower frame 31.
0 and the engaging member 46 of the mounting end plate 53 is fitted and placed in the engaging member fitting recess 51 of the bearing end plate 50, and the supporting end plate 50 and the mounting end plate 53 are The driving wheels 43 for traveling and the driven wheels 55 for traveling are fastened and coupled by a plurality of bolts 56 inserted through the through holes.
Are mounted on the traveling lower rail 34.

In the case of the above-mentioned embodiment, the lifting drive unit 11
The traveling drive device 42 and the traveling drive device 42 can be combined into a single elevating and traveling drive unit 47, which can be attached to the end of the intermediate lower frame 31 of the traveling frame 9 at any height and any strut spacing. Further, the elevating and traveling drive unit 47 can be factory manufactured and prepared in advance, and this can be attached to the intermediate lower frame 31 of the traveling frame 9 having an arbitrary size as required. Further, by rotating the chain tension adjusting nut 17, the tension of the load platform lifting chain 8 can be easily adjusted.

FIGS. 13 to 16 show a shelving crane according to an embodiment of the second invention, in which a chain tension sprocket 5 is provided below the supporting member 4 at right angles to the traveling direction of the crane (front-rear direction). It is rotatably mounted by a horizontal shaft 6, and at a lower level than the chain tension sprocket 5, one end of the carrier platform lifting chain 8 is connected to the side frame member 2 by a mounting bracket 18 and a bolt. The lifting chain 8 is wound around the upper half of the chain tension sprocket 5, and the sprocket 5
Although it hangs down from the part opposite to the side frame member 2 in the guide member 19 fixed to the lower part of the side frame member 2, the other structure is the same as that of the embodiment of the first invention. Is.

FIG. 17 and FIG. 18 show another example of the connected state of one end portion of the loading platform lifting chain 8 which can be adopted when the second invention is carried out. The mounting bracket 18 is connected to the mounting bracket 1
8 is fixed by bolts 58 to the upper portion of a holding member 57 having a box-shaped cross section that is fixed to the lower portion of the side frame member 2.

[0015]

According to the present invention, the loading platform lifting chain 8 below the lifting loading platform 1 is farther from the columns 25 and 26 of the traveling frame 9 than the loading platform lifting chain 8 above the lifting loading platform 1. Since it is arranged, even if the shelving crane 14 that is traveling with the lift platform 1 placed in the raised position is stopped,
It is possible to prevent the load carrier lifting chain 8 below the lift carrier 1 from laterally swaying due to inertia and colliding with the columns 25 and 26, and generating noise due to the collision, and the chain tension compression spring 7 Even if the chain breaks, the chain tension adjusting nut 17 is supported by the supporting member 3, so that it is possible to prevent the load platform lifting chain 8 below the lift platform 1 from dropping. By rotating the chain tension adjusting nut 17, it is possible to easily adjust the tension of the chain 8 for lifting the platform. Further, a chain tension sprocket 5 is rotatably attached to a lower portion of the support member 4 by a horizontal shaft 6 perpendicular to the traveling direction of the crane, and a chain 8 for lifting and lowering a cargo bed, one end of which is connected to the side frame member 2, The chain sprocket 5 is wound around the upper half of the sprocket 5 and hung down from the side of the sprocket 5 opposite to the side frame member 2, so that the vertical movement amount of the support member 4 at the time of adjusting the chain tension can be increased or decreased. Since the amount of movement of the lower loading platform lifting chain 8 can be halved, the chain tension compression spring 7 can be downsized.

[Brief description of drawings]

FIG. 1 is a partially longitudinal side view showing the vicinity of one side of a lifting platform in a shelving crane according to an embodiment of the first invention.

FIG. 2 is a cross-sectional plan view showing the vicinity of one side of the lifting platform in the shelving crane according to the embodiment of the first invention.

FIG. 3 is a partial vertical cross-sectional side view showing the vicinity of a lifting platform in the shelving crane according to the embodiment of the first invention.

FIG. 4 is a partially cutaway front view of a lifting platform in a shelving crane according to an embodiment of the first invention.

FIG. 5 is a side view showing a shelving crane according to an embodiment of the first invention.

FIG. 6 is a side view showing the vicinity of a drive unit for lifting and traveling in a shelving crane.

7 is a cross-sectional view taken along the line AA of FIG.

FIG. 8 is a front view showing the vicinity of a lifting / traveling drive unit in a shelving crane.

FIG. 9 is a rear view of the lifting and traveling drive unit.

FIG. 10 is a front view showing the vicinity of an intermediate lower frame in the traveling frame.

FIG. 11 is a side view showing the vicinity of a control panel in the shelving crane.

FIG. 12 is a partial cross-sectional plan view showing the vicinity of a control panel in a shelving crane.

FIG. 13 is a partially longitudinal side view showing the vicinity of one side of the lifting platform in the shelving crane according to the embodiment of the second invention.

FIG. 14 is a partial vertical cross-sectional side view showing the vicinity of a lifting platform in the shelving crane according to the embodiment of the second invention.

FIG. 15 is a partially cutaway front view of the lifting platform in the shelving crane according to the embodiment of the second invention.

FIG. 16 is a side view showing a shelving crane according to an embodiment of the second invention.

FIG. 17 is a partially longitudinal side view showing another example of the connected state of the ends of the carrier platform lifting chain that can be used in the embodiment of the second invention.

FIG. 18 is a partially longitudinal front view showing, in an enlarged manner, a connecting portion at an end portion of the carrier platform lifting chain shown in FIG. 17;

[Explanation of symbols]

 1 Lifting platform 2 Side frame 3 Supporting member 4 Supporting member 5 Chain tension sprocket 6 Horizontal shaft 7 Chain tension compression spring 8 Loading platform lifting chain 9 Travel frame 10 Lower guide sprocket 11 Lifting drive device 12 Drive sprocket 13 Upper part Guide sprocket 14 Shelving crane 15 Bed 17 Chain tension adjusting nut 18 Mounting bracket 19 Guide member 20 Lower frame 21 Upper frame 22 Screw rod 23 Support bracket 24 Locking nut 25 Strut 26 Strut 31 Middle lower frame 32 End lower frame 33 End Lower Frame 34 Lower Rail for Travel 36 Upper Guide Rail 37 Upper Guide Roller 38 Electric Motor 39 Reducer 40 Electric Motor 41 Reducer 42 Driving Device 43 Driving Drive Wheel 45 Mounting End Plate 46 Engagement Member 47 Lifting Drive unit for combined use 49 Bearing end plate 50 Bearing end plate 51 Engaging member fitting recess 52 Bolt 53 Mounting end plate 54 Control panel 55 Driven wheel for driving 56 Bolt

Claims (2)

[Claims] 1. A support member 3 protruding toward an opposite side frame member 2 is fixed to side frame members 2 fixed on both sides in a traveling direction of a crane in a lifting platform 1 of a shelving crane, and the support member is supported. A lower guide sprocket 10 in which one end of a carrier platform lifting chain 8 is connected to the lower part of a support member 4 which is vertically slidably fitted to the carrier 3, and the carrier platform lifting chain 8 is attached to a lower part of a traveling frame 9 of a shelving crane. And the drive sprocket 12 of the lifting drive device 11 mounted on the traveling frame 9 and the upper guide sprocket 13 mounted on the upper part of the traveling frame 9 in order, and the loading platform lifting chain 8 hanging from the upper guide sprocket 13 The end portion of the chain is connected to the side frame member 2, and the chain tension compression nut 17 screwed onto the upper portion of the support member 4 and the bearing member 3 are compressed for chain tension. With the spring 7 interposed, the distance between the lower platform 8 of the lifting platform 1 and the column of the traveling frame 9 is set to be smaller than the spacing between the upper chain 8 of the traveling frame 9 and the column of the traveling frame 9 above the platform 1. A larger stacking crane. 2. A supporting member 3 projecting toward an opposite side frame member 2 is fixed to side frame members 2 fixed to both sides in the traveling direction of a crane in a lifting platform 1 of a shelving crane, and the supporting members are supported. 3, a chain tensioning sprocket 5 is rotatably attached to a lower portion of a supporting member 4 which is vertically movable by a horizontal shaft 6 perpendicular to the traveling direction of the crane, and one end portion of which is connected to the side frame member 2. A lifting chain 8 is wound around the upper half of the sprocket 5 and hangs down from the side of the sprocket 5 opposite to the side frame member 2, and then a lower guide sprocket 10 attached to the lower part of the traveling frame 9 of the shelving crane. And the drive sprocket 12 of the lifting drive device 11 mounted on the traveling frame 9 and the traveling frame 9
Is sequentially wound around the upper guide sprocket 13 attached to the upper part of the above, and the end portion of the loading platform lifting chain 8 hanging from the upper guide sprocket 13 is connected to the side frame member 2 and screwed onto the upper portion of the supporting member 4. The chain tension compression spring 7 is interposed between the chain tension adjusting nut 17 and the support member 3 and the space between the lowering platform 1 lower chain 8 for lifting the loading platform and the column of the traveling frame 9 is raised and lowered. A shelving crane in which the distance between the upper and lower chains 8 of the platform 1 and the columns of the traveling frame 9 is larger than the spacing between the columns.