JPH0123634Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a conveying device for conveying molds of press machines, injection molding machines, molding machines, die-casting machines, etc. or workpiece pallets of machine tools.

The conveying device for the molds and the like is used to carry the molds and the like into and out of predetermined installation positions of the various machines mentioned above, and various devices have been put into practical use.

As an example of a conventional device, the main parts of “Press mold conveyance device” (Japanese Patent Publication No. 55-48535) are shown in Figures 10 to 1.
Shown in Figure 2.

In the case of this conveyance device, two rails 101 at the front and rear
A stopper rail 101A is provided between the V
A piston rod 10 with a free ring 104 of a stopper part 106 provided on the bogie 102 side in a shape fitting part 103
5, the truck 102 is stopped.

This type of conventional device has the following drawbacks.

(1) When stopping the truck 102, since the truck 102 and the mold are both heavy and traveling at high speed, a very large impact force is applied to the stopper portion 106 and the fitting portion 103, which may cause them to be deformed or damaged. Easy to use and less durable.

(2) Since the bogie 102 stops suddenly, the bogie 1
The mold D on 02 slides on the roller conveyor 107 of the mounting section due to its kinetic inertia, and the press machine
An error occurs in the position of mold D relative to _P1 .

The present invention aims to eliminate the above-mentioned drawbacks and is constructed as follows.

It is a conveyance device for molds, etc., consisting of a rail, a truck, a locking device, and a stop control device, and the rails are laid in parallel on the floor in pairs, front and rear. The bogie is provided with at least one mounting portion on its upper surface, at least one of the running wheels of the bogie can be rotated by a traveling drive device, and the running wheel resting on one rail is a flange wheel. In addition, the running wheels on the other rail are flat wheels without flanges, and the locking device consists of a locking pin, a locking pin driving means, and a locking plate, and the lower part of the bogie on the other rail side and the A locking pin and a locking pin drive means are provided on one side of the rail or the floor near the rail, and a lock is provided on the other side, the locking pin can be driven up and down by the locking pin driving means, and the locking plate is provided with a locking pin and a locking pin driving means. By drilling a locking hole and inserting a locking pin into the locking hole, the truck can be positioned at a predetermined stop position, and the stop control device
It consists of a detection means that detects and operates when the trolley reaches a stop operation position near the left or right side of a predetermined stop position, and a stop command means, and the travel drive device is stopped by the stop command means based on a detection signal from the detection means. At the same time, the locking pin driving means drives the locking pin toward the locking plate and fitting it into the locking hole, and during the above-mentioned stopping operation, the cart is slightly moved around the locking pin by its kinetic inertia. While rotating the truck, the flanges of the flanged wheels of the truck come into frictional sliding contact with the sides of the rail, thereby stopping the truck while providing cushioning.

As described above, when the bogie is stopped at a predetermined stop position, at a stop operation position near the predetermined stop position, the stop command means is used to drive the cart based on a detection signal from the detection means. While the device is stopped, the locking pin of the locking device is advanced toward the locking plate and guided into contact with the locking plate, and at a predetermined stop position, the locking pin is inserted into the locking hole of the locking plate. By this, the trolley is positioned, and by sliding the flat wheel on the rail on the locking pin side, the trolley is rotated slightly by its kinetic inertia with the locking pin as the center of rotation, and the flange of the running wheel and the rail are aligned. By bringing the cart into frictional sliding contact with the side surface, the cart is stopped while being cushioned, so that the following effects are achieved.

(b) Since the impact acting on the locking device is greatly reduced, the load conditions on the locking pin of the locking device, the locking plate, and the structural members of the truck to which the locking device is attached are greatly improved. , there is no deformation or damage to them, and their durability is improved.

(b) When the cart suddenly stops, the mold, etc. will not slip on the cart due to its inertia and lose its position, so the position of the mold, etc. relative to the punch machine, etc.
It can be determined with high precision.

Moreover, since problems such as damage to the locking device and slipping of the mold are eliminated, the running speed of the truck can be increased. Therefore, the efficiency of transporting and exchanging molds and the like can be greatly improved.

(c) In addition to equipment that normally requires a locking device such as a stop control device, the position of the locking device must be changed and wheels with flanges and flat wheels can be selected and used, making the device special and complicated. - Since no expensive equipment is required, the present invention can be implemented easily and inexpensively, and can be easily applied to existing equipment.

Embodiments of the present invention will be described below with reference to the drawings.

Two rails 1 are run on the front side of the vertical press machine P, and a cart 2 for exchanging the mold D of the press machine P can run left and right on the rails 1.

Two mounting sections are provided on the upper surface of the trolley 2.
Each mounting section is equipped with a roller conveying device 3 for moving the mold D in the front and back direction, and a pair of upper and lower molds D is loaded on each mounting section, and the mold D is moved by the next push-pull device 4. can be transported from the cart 2 to the press machine P or vice versa.

A push/pull device 4 is attached corresponding to each loading section,
A drive band 6 is driven by a sprocket 5 which is rotatably driven by a common electric motor 8 or an air motor via an electromagnetic clutch, and a push/pull hook 7 connected to the tip thereof moves the mold D forward or backward.

The drive band 6 has idlers 9a provided on both sides of a steel chain 9, and the idlers 9a are guided by the guide grooves 10a of the guide tool 10 and do not bend during push driving.

Incidentally, instead of the steel chain 9, a steel strip plate 11 as shown in FIGS. 8 to 9 may be used.

Further, reference numeral 31 is a topper for preventing the mold D from moving when the trolley 2 is traveling.

Here, the characteristic mechanism of the present invention is as follows.

When replacing the mold D, move the cart 2 to the press machine P.
The press machine P is stopped at a predetermined stop position X on the front side, and after conveying the used mold D on the side of the press machine P to one of the mounting sections, the trolley 2 is run and stopped at another predetermined stop position X. Then, the mold D on the other mounting section is transported onto the bolster of the press machine P.

The truck 2 has four pairs of running wheels 12, and the right pair of running wheels 12 is driven by a running drive device 13.

The traveling drive device 13 includes an electric motor 14 with a brake.
The pair of front and rear running wheels 12 are driven to rotate in forward and reverse directions via a speed reducer 15, a chain 16, and a sprocket 32a provided on a common axle 32.

Of the eight running wheels 12, the four rear wheels 1
Wheels 12a with both flanges are used for wheel 2, and flat wheels 12b without flanges are used for the four wheels 12 on the front side.

The locking device 17 includes a vertically downward locking pin 18,
It consists of a locking pin drive means 19 and a locking plate 21. The locking pin 18 is slidably installed in a guide hole 23 provided at the lower part of the front right end of the truck 2 corresponding to the upper side of the front rail 12b, and is attached to the hydraulic cylinder 19.
It can be driven up and down via a locking pin drive means 19 consisting of a and a bent link 20.

The locking plate 21 is fixed by welding to the front side surface of the front rail 1 so as to correspond to the locking pin 18 when the trolley 2 is located at each predetermined stop position X. By fitting the locking pin 18 into the locking hole 22 at the center in the length direction, the trolley 2 can be positioned and stopped at each predetermined stop position X.

Incidentally, the bent link 20 may be omitted and the piston rod of the inverted hydraulic cylinder may be directly connected to the locking pin 18. Note that a small hydraulic pressure supply device for the hydraulic cylinder 19 is provided on the truck 2.

The stop control device 24 includes a detection means 25 and a stop command means 28.

The detection means 25 consists of a limit switch 26 provided on the bogie 2 and an operating piece 27 inside the rail 1 that operates the limit switch 26. The actuating piece 27 detects the stop operation of the bogie 2 near the left side and near the right side of each predetermined stop position X. When reaching position Y, the limit switch 26
Based on the detection signal, the stop control device 24 causes the traveling drive device 13 to stop, and the locking device 17
Hydraulic pressure is supplied to the hydraulic cylinder 19 of. As a result, the locking pin 18 descends to the left or right guide surface 21a of the locking hole 22 of the locking plate 21 and presses into contact with the guide surface 21a, and the trolley 2 moves further by its kinetic inertia and reaches a predetermined position. When reaching stop position X, locking pin 1
8 fits into the locking hole 22, and the truck 2 stops.

At this time, the truck 2 turns around the locking pin 18 due to its driving inertia. That is, while the front flat wheel 12b slides on the rail 1, the front and rear flanges of the rear flanged wheel 12a come into frictional sliding contact with the side surface of the rear rail 1, so that the trolley 2 is held in place with almost no impact. It stops exactly at the stopping position X.

However, if the spacing between the flanges of the flanged wheels 12a is only slightly larger than the width of the rail 1, the turning angle of the bogie 2 will be an extremely small value, and the error in positioning accuracy of the bogie 2 can be kept to about 10 mm. .

Although the above-mentioned errors are hardly harmful when transporting the mold D, higher positioning accuracy may be required in the case of a transport device for a workpiece pallet of a machine tool, etc.

Therefore, coupling means for correcting the position of the carriage 2 which has turned slightly after being positioned by the locking device 17 and positioning it with high precision is provided on the left rear side of the carriage 2 and on the floor. That is, similar to the locking device 17, a tapered dowel that is driven up and down by a dowel drive means consisting of a hydraulic cylinder and a folding link is provided on the truck, and a taper fitting hole into which the dovetail engages is provided. By providing a block on the floor side and fitting a dowel into the fitting hole, the carriage 2 can be positioned with high precision by the locking device 17 and the dowel means.

In addition, when the flange-equipped wheel 12a is made of a steel material having excellent strength and elasticity, the elastic deformation of the flange can also be utilized during the frictional sliding contact.

In addition, instead of the collar of the flanged wheel 12a, a long friction braking means (not shown) having a gate-shaped cross section is provided on the bogie 2, and this is loosely fitted onto the rear rail 1, and the collar is attached to the rail. It is also conceivable to make frictional sliding contact with the side surface of 1.

In addition, the locking pin 18 may be provided at the center of the cart 2 in the left-right direction, or may be provided near the left end.

The locking command means 28 includes an electric control device connected to an input circuit to the electric motor 14 of the travel drive device 13, and stops the electric motor 14 based on the detection signal from the limit switch 26.
Activate that brake. This stop command means 2
8, various mechanisms other than those described above can be used using existing technology.

Note that the same effect can be achieved even if the locking pin 18 of the locking device 17 is provided on the floor surface side of the hydraulic cylinder 19 and the locking plate 21 is provided on the truck 2 side.

Alternatively, the rear wheels 12 may be flat wheels 12b, the front wheels 12 may be flanged wheels 12a, and the locking devices 17 may be provided at the rear of the rear rail 1 and the truck 2.

[Brief explanation of the drawing]

1 to 9 show embodiments of the present invention.
The figure is a plan view, Figure 2 is a vertical front view of the cart, Figure 3 is a vertical side view, Figure 4 is an enlarged vertical side view of the push/pull device, and Figure 5 is a vertical front view of the guide of the push/pull device. , FIG. 6 is a longitudinal side view of the stopper, FIG. 7 is a longitudinal side view of the locking device, FIG. 8 is a partial plan view of a drive band according to a modified example, and FIG. 9 is for the drive band of FIG. 8. 10 to 12 show a conventional device, FIG. 10 is a plan view of the conventional device, FIG. 11 is a partially cutaway front view, and FIG. 12 is a front view of the locking device. It is. 1...Rail, 2...Dolly, X stop position, Y...
...stop operation position, 12...running wheel, 12a...flange wheel, 12b...flat wheel, 13...travel drive device, 17...locking device, 18...locking pin, 1
9... Locking pin drive means, 21... Locking plate, 21
a... Guide surface, 22... Locking hole, 24... Stop control device, 25... Detection means, 28... Stop command means.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A conveying device for molds, etc. that serves as the rail 1, the trolley 2, the locking device 17, and the stop control device 24,
The rails 1 are a pair of front and rear rails, and are laid parallel to each other on the floor surface.The bogie 2 has at least one mounting section on its upper surface, and runs on at least one of the running wheels 12 of the bogie 2. The driving device 13 enables rotational driving, and the running wheels 12 mounted on one rail 1 are turned into flanged wheels 12a, and the running wheels 12 mounted on the other rail 1 are turned into flat wheels without flanges 12b.
The locking device 17 includes a locking pin 18, a locking pin drive means 19, and a locking plate 21, and is connected to the lower part of the truck 2 on the other rail 1 side and the floor of this rail 1 or the vicinity thereof. A locking pin 18 and a locking pin driving means 19 are provided on one side, and a locking plate 21 is provided on the other side, so that the locking pin 18 can be driven up and down by the locking pin driving means 19,
A locking hole 22 is formed in the locking plate 21 and the locking pin 18 is fitted into the locking hole 22, thereby making it possible to position the truck 2 at a predetermined stop position X. It consists of a detection means 25 and a stop command means 28, which detect and operate when the motor reaches a stop operation position Y near the left or right side of a predetermined stop position X. Based on a detection signal from the detection means 25, the stop command means 28 The traveling drive device 13 is stopped, and the locking pin driving means 19 drives the locking pin 18 toward the locking plate 21 to fit into the locking hole 22. Due to its kinetic inertia, the locking pin 18
The truck 2 is characterized by being configured so that the truck 2 is stopped while being cushioned by bringing the flanges of the flanged wheels 12a of the truck 2 into frictional sliding contact with the side surfaces of the rail 1 while slightly turning around the center. Conveyance device for molds, etc. 2 Utility Model Registration In the device for transporting molds, etc. described in Claim 1, the locking pin 18 of the locking device 17 and the locking pin drive means 19 are provided on the trolley 2, and the locking plate 21 is mounted on the rail. Fixed to the side of 1. 3. Utility Model Registration Scope of Claims 1. The transport device for molds, etc., described in claim 1, in which the detection means 25 consists of a limit switch 26 provided on the trolley 2 and an actuating piece 27 provided on the floor side.