JP2001259956A - Fall-down preventing device for track truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fall-down preventing device for a track truck which has a work loading pallet carried into and out of a machining center without using a cylinder device. SOLUTION: A track truck is provided with a mobile body 21 capable of shifting the pallet in its transfer direction along with a rail 11, a pallet lift device supported by the mobile body 21, arranged so as to be capable of lifting up and down the pallet, a base part 25 holding on the pallet lift device, a pallet carry-in/out device arranged so as to be capable of operating the pallet back and forth in the base part 25, carrying-in/out the pallet in the machining center. The track truck is fixed on the rail 11 by abutting a clamper 20 on the rail 11 so as to engage with the lifting operation of the pallet device and by bringing a wheel of the track truck in narrow contact with the clamper 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track for transferring a pallet having a work loaded on an upper surface thereof into a machining center or unloading a pallet having a work loaded on the upper surface mainly from a machining center. About the trolley.

[0002]

2. Description of the Related Art When a pallet loaded with a work is carried into a machining center by a pallet loading / unloading device of a tracked truck, the pallet loaded with the work is moved from the tracked truck into the machining center, and the tracked truck is moved. When the center of gravity of the pallet on which the work is loaded on the trolley moves to the outside of the tracked trolley, the weight of the pallet on which the work is loaded may cause the tracked trolley to fall. Similarly, when unloading a pallet on which a work is loaded from the machining center, when the pallet on which the work is loaded is loaded on the pallet loading / unloading device of the tracked truck, the weight of the pallet on which the work is loaded. , The tracked truck may fall over. Therefore, in order to prevent the tracked truck from overturning due to the movement of the center of gravity of the pallet on which the work is loaded, a tracked truck overturn prevention device shown in FIGS. 4 and 5 is provided. This fall prevention device for a tracked truck is a device for preventing the tracked truck from falling over by clamping a lower rail with a fixture attached to the tracked truck. A wedge 45 is attached to a cylinder device 44 attached to a cylinder bracket 46 of the track bogie.
Are supported by two right and left bushes 48 inserted into a clamper block 47 attached to the base 14 via a cylinder bracket 46. Wedge 45
In the clamper block 47, the inside of the clamper 20 having the inclined groove 50 having the inclination 49 similar to the shape of the wedge 45 is fitted into the inclined groove 50 in the clamper 20 and penetrates. The clamp part 41 of the clamper 20 is
It is arranged so that it may be located in the lower part of. According to this device, when the cylinder device 44 advances, the cylinder device 44
Similarly, the inclined portion 51 of the wedge 45 attached to the clamper 20 advances in the inclined groove 50 of the clamper 20, and the inclined portion 51 of the wedge 45 presses the inclined groove 50 of the clamper 20 downward, whereby the clamper 20 is moved downward. It moves and separates from the jaw 42 of the rail 11. In this state, the tracked carriage becomes a state in which it can travel on the rail 11. When the tracked truck stops on the rail 11, the cylinder device 44 retreats, the inclined portion 51 of the wedge 45 attached to the cylinder device 44 also retreats in the inclined groove 50 of the clamper 20, and the inclined portion 51 of the wedge 45. Presses the inclined groove 50 of the clamper 20 upward, the clamper 20 rises,
The rail 11 is sandwiched between the wheels 17 and the clamper 20 and the tracked truck is fixed on the rail 11, thereby preventing the tracked truck from tipping over.

[0003]

SUMMARY OF THE INVENTION Claim 1 according to the present invention
Is different from the above-mentioned method in that it adopts a novel structure that can hold the rail between the wheels of the tracked truck and the clamper without using a cylinder device and can prevent the tracked truck from tipping over. It is an object to provide a fall prevention device for a rail truck.

[0004]

According to a first aspect of the present invention, there is provided an apparatus for preventing falling of a tracked vehicle, wherein a pallet on which a work is loaded or a pallet on which a work is loaded is movable along a rail in a transport direction thereof. A pallet lift device that is held by a movable body and that is provided to be able to raise and lower the pallet, a base that is held on the pallet lift device, and a pallet that is provided on the base so that the pallet can be moved back and forth. A tracked truck mainly for supplying and discharging pallets into a machining center, comprising a pallet loading / unloading device for loading / unloading into / from a machining center, and engaging with a lifting operation of a pallet lift device, By fixing the fixture for fixing the tracked truck to the rail to the rail, and clamping the rail between the fixture and the wheel of the tracked truck, the tracked truck is fixed to the rail. It is characterized in that constant.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION According to the present embodiment, a track guided vehicle traveling along a rail is clamped between wheels and a clamper without using a cylinder device when the track guided vehicle stops on the rail. A tracked truck equipped with a tracked truck tipping prevention device adopting a novel structure that can prevent the tracked truck from tipping over by loading a pallet loaded with workpieces into the machining center, or inside the machining center This is a tracked truck for unloading pallets loaded with workpieces from. In addition, a tracked truck for carrying in and out a pallet on which a work is loaded into a machining center is required to be reduced in cost while maintaining its function. Hereinafter, typical embodiments of the present invention will be described with reference to the drawings. However, the dimensions, shapes, materials, relative positions and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to them unless otherwise specified. , Is merely an illustration. A tracked truck for carrying a pallet loaded with works into and out of a machining center according to the present embodiment will be described with reference to FIGS. 1, 2, and 3. The range is not limited only to the above. In the tracked truck of the present invention, two right and left rails 11 for running the tracked truck are installed on a rail bracket 13 together with a rack 12 for running the tracked truck.
A tracked truck installed on two left and right rails 11 is provided with a traveling motor 16 having a pinion 15 attached to a base 14 for traveling on the two left and right rails 11,
When the wheels 17 running on the book rail 11 and the pallet 19 loaded with the work 18 are carried in and out of the machining center, the center of gravity of the pallet 19 loaded with the work 18 is
A movable body 21 having a clamper 20 for preventing the tracked truck from falling over due to the outside of the tracked truck, and two right and left eccentric cams 23 driven by a lift motor 22. By the swinging, the two right and left lift bars 24 held on the base 14 are raised and lowered to raise and lower the pallet 19 on which the work 18 is loaded, and the pallet lift apparatus is supported by the base 14 of the pallet lift apparatus. Base 2 fixed on two left and right lift bars 24
5 and a fork 27 on which a pallet 19 on which a work 18 is loaded is moved by a pallet carry-in / out motor 26 attached to a base 25, and an arm 28 is moved forward and backward, so that the work 18 is moved into the machining center.
And a pallet loading / unloading device for loading a pallet 19 loaded with the workpiece 18 or unloading the pallet 19 loaded with the work 18 from the inside of the machining center.

[0006] Two right and left rails 11 are installed in the traveling section where the tracked truck travels, and two racks 12 are provided in the traveling section where the tracked truck travels to make the tracked truck travel. The floor surface 30 is provided with rail brackets 13 provided with jack bolts 29 for horizontally holding the rails 11 and the racks 12 and provided at several places in a traveling section where the tracked truck travels. Rail bracket 1
On two right and left rails 11 installed on 3, a tracked truck is placed via several wheels 17 attached to a base 14, and the base 14 also has two left and right rails A traveling motor 16 having a pinion 15 mounted on a shaft 31 for running a tracked truck on the rail 11 via several wheels 17 is mounted vertically with the shaft 31 having the pinion 15 inserted down. Then, the pinion 15 is meshed with the rack 12 installed on the rail bracket 13. As a result, the traveling motor 16 having the pinion 15
Is activated, the tracked truck can travel on the two left and right rails 11 via several wheels 17.

A lift for driving a pallet lift device for raising and lowering a pallet 19 loaded with a work 18 loaded on a pallet loading / unloading device on a base 25 is provided on a movable body 21 of a tracked truck. Motor 22 is provided. The lift motor 22 is provided with eccentric cams 23 at left and right shaft ends 33, and separate left and right shafts 35 supported by two bearings 34 are respectively inserted therein. Are mounted in a cam case 36 machined concentrically with the left and right eccentric cams 23 of the two left and right lift bars 24 respectively. As a result, when the lift motor 22 is activated, the eccentric distance 37 between the center of the lift motor 22 in which the left and right separate shafts 35 are inserted and the centers of the two eccentric cams 23 on the left and right are two. The two lift bars 24 left and right supported and held by the bearing 14 on the base 14 are moved up and down, and the work 18 loaded on the pallet loading / unloading device on the base 25 is taken up. Is raised and lowered. The left and right lift bars 24 are concentric with the two left and right lift bars 24 held by the base 14, and are located below the two left and right lift bars 24.
The clamper 20 is mounted such that the clamp portion 41 of the clamper 20 is positioned below the jaw 42 of the rail 11 with the hinge pin 40 inserted in the bracket 39 attached to the bracket 4 interposed therebetween. Clamp part 41 of right and left clampers 20
Each of the springs 43 is mounted on the upper part of the clamper, and the clamper 20 is constantly pushed downward by the spring force. For example, when the tracked truck is stopped on the rail 11, the lift bar 24 is lifted. When the lift bar 24 is raised, the lift bar 24 and the clamper 20 do not come into contact with each other. When the pallet 19 loaded with the work 18 is carried in and out of the machining center by swinging toward the portion 42 and the jaw 42 of the rail 11 is hooked by the clamp portion 41 of the clamper 20, the pallet 19 loaded with the work 18 is The center of gravity prevents the tracked truck from falling over due to the outside of the tracked truck. When the tracked truck is traveling on the rail 11, the lift bar 24 descends. When the lift bar 24 descends, the lift bar 24 and the clamper 20
And the lift bar 24 presses the upper surface of the clamper 20 with a force greater than the force pressing the clamper 20 by the spring 43, so that the clamp portion of the clamper 20
It swings in the direction opposite to 1 and the tracked truck can travel on the rails 11. Also, on the two left and right lift bars 24 held on the base 14 of the pallet lift device,
The base 25 is fixed. A pallet loading / unloading motor 26 is attached to the base 25, and the arm 28 moves forward and backward by a pinion inserted into the shaft of the pallet loading / unloading motor 26 and a rack attached to the arm 28. With the movement of the arm 28, the fork 27 moves forward and backward by the pinion inserted into the shaft of the arm 28 and the rack attached to the fork 27, and the work 18 is loaded into the machining center. The pallet 19 is loaded or the pallet 19 loaded with the work 18 is unloaded from the machining center. In addition, the device of the present invention is not limited to the embodiment described above and shown in the drawings, and can be appropriately changed without departing from the gist.

[0008]

According to the present invention, the pallet lift device is engaged with the lifting operation, the rail is clamped between the wheels of the tracked truck and the clamper, and the pallet on which the work is loaded is loaded and unloaded mainly to the machining center. According to the track bogie overturn prevention device adopting a novel structure that can prevent the track bogie from overturning, the cylinder device becomes unnecessary,
Along with this, a pump unit, a compressor, etc., a supply source for supplying a drive medium for the cylinder device to the cylinder device, an electromagnetic valve for controlling a drive medium for driving the cylinder device, and a control device for controlling the electromagnetic valve, This eliminates the need for assembling time, piping, wiring time, and the like for mounting the cylinder device, which is advantageous for cost reduction, as well as for reducing the size of the device and facilitating maintenance.

[Brief description of the drawings]

FIG. 1 is a side view schematically illustrating a use mode of an apparatus according to an embodiment of the present invention.

FIG. 2 is a side view of the apparatus according to the embodiment of the present invention.

FIG. 3 is a front view of the apparatus according to the embodiment of the present invention.

FIG. 4 is a side view showing a cross section of a rail clamp portion of the conventional device.

FIG. 5 is a front view showing a cross section of a rail clamp portion of the conventional device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Rail 12 ... Rack 13 ... Rail bracket 14 ... Base 15 ... Pinion 16 ... Traveling motor 17 ... Wheel 18 ... Work 19 ... Pallet 20 ...・ Clamper 21 ・ ・ ・ Movable body 22 ・ ・ ・ Motor for lift 23 ・ ・ ・ Eccentric cam 24 ・ ・ ・ Lift bar 25 ・ ・ ・ Base 26 ・ ・ ・ Pallet loading / unloading motor 27 ・ ・ ・ Fork 28 ・ ・ ・Arm 29 ... Jack bolt 30 ... Floor surface 31 ... Shaft 32 ... Geared motor for lift 33 ... Shaft end 34 ... Bearing 35 ... Shaft 36 ... Cam case 37 ... -Eccentric distance 38-Bearing 39-Bracket 40-Hinge pin 41-Clamp part 42-Jaw 43-Spring 44-Cylinder device 45-Wedge 4 ... cylinder bracket 47 ... clamper block 48 ... bush 49 ... inclined 50 ... inclined groove 51 ... inclined portion

Claims (1)

[Claims] A pallet on which a work is loaded or a pallet for loading the work is movable along a rail in the transport direction, and the pallet is moved up and down by the movable body. A pallet lift device provided so as to allow the pallet to be moved into and out of a machining center, the base being held on the pallet lift device, and the pallet being provided on the base so that the pallet can be moved back and forth. A pallet truck for supplying and discharging the pallet mainly into a machining center, comprising a pallet loading / unloading device, wherein the pallet lift device is engaged with a lifting operation, and the rail truck is attached to a rail. A fixing tool for fixing is fixed to the rail, and the rail is sandwiched between the wheel of the tracked truck and the fixing tool, so that the tracked truck is fixed to the rail. A fall prevention device for the tracked truck.