JPS6147735B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a trolley device.

For example, when an upper mold and a lower mold are alternately vacuum molded using the vacuum molding method, conventionally, a hand-pushed transport carriage on which an upper mold plate and a lower mold plate are mounted is prepared, and this is used as a film molding station. The necessary molding operations can be carried out by moving between the frame setting station where the casting flask is superimposed on the model plate and the sand supply hotspot station, or the rotary table 30, which can be rotated intermittently, is used as shown in FIG. Drive roller 31 on the top surface of
31' is laid down to constitute a film forming station a and a frame setting station lo, and a drive roller 31'' is laid down on an extension of the drive rollers 31 and 31' to constitute a sand supply station. Drive rollers 31, 31', 3
1" so as to be freely movable and move them back and forth between the film forming station A, the frame setting station A, and the sand supply station A, respectively, to perform the required molding operation. However, in the former case, productivity is poor and workers are forced to work hard, and in the latter case, since a rotary table 30 is used, the equipment becomes complicated and equipment costs are high. In addition, the overall height of the device increases.
There were various problems such as having to dig a pit and bury it inside to lower the height of the working position.

The present invention solves these problems and provides a dolly device for feeding workpieces to molding devices and other various device bodies, which has a simple structure that allows not only forward and backward movement but also rotation accurately and easily. This invention was completed for the purpose of a trolley device, and the present invention will be described in detail below with reference to the illustrated embodiments.

Reference numeral 1 denotes a truck frame, and a pair of motors 2 and 2' each equipped with a reduction gear are mounted via a motor base 3 on both sides of the center of the lower surface of the truck frame 1, with their drive shafts facing outward. Driving wheels 4 and 4' having high frictional resistance, such as rubber tires, are attached to the drive shaft, and the driving wheels 4 and 4' are rotated forward and backward independently by the operation of the motors 2 and 2'. It's summery. In addition, this pair of motors 2,
2', a support rod 5 is vertically provided on the bogie frame 1, and the drive wheels 4, 4' are arranged at symmetrical positions with the support rod 5 as the center. In other words, at the four corners there are swivel wheels 7 (commonly known as casters) that can rotate freely in a vertical plane.
are provided so as to be able to rotate in a horizontal plane via a support member 7', and by operating the pair of motors 2, 2' in forward rotation at the same time, the driving wheels 4, 4' are respectively rotated in the forward direction and moved forward. By operating the motors 2 and 2' in reverse at the same time, the drive wheels 4 and 4' are respectively rotated in the reverse direction and moved backward, and when one motor 2 is operated in the forward rotation while the other motor 2' is operated in the reverse rotation, It constitutes a cart A that is rotated about a support rod 5 that is engaged with a guide member 6, which will be described later, as a fulcrum. Further, an upper model plate 9 is provided on the front part of the upper surface of the truck frame 1, and a lower model plate 10 is provided on the rear part of the upper surface with support legs 9a and 1 protruding from both ends thereof.
A positioning hole (not shown) drilled in 0a is fitted into a positioning pin (not shown) provided upright on the upper surface of the truck frame 1, and the parts are respectively placed. Reference numeral 8 denotes a base, on which a guide member 6 having a generally U-shaped planar shape with an open tip is laid at a predetermined position on the upper surface of the base. They are installed on the base 8 so as to be freely movable. On the other hand, B is a vacuum mold making device installed on the base 8, and to explain this in detail below, 11 has a proximal end fixedly supported on the outer surface of a portal frame 12 erected on the base 8. The film forming apparatus 11 includes a film heating apparatus 13 in which a heater is installed in an internal space of a frame, and a film heating apparatus 13.
A holding frame 14 is removably suspended from the lower end of the
This is to heat and soften the film to make it easier to mold the film. Reference numeral 15 denotes a vibration table provided below the center of the gate-shaped frame 12, and the vibration table 15 is supported on the upper surface of the base 16 so as to be able to rise and fall via an elastic air spring 17 that can be expanded and contracted by supplying and discharging compressed air. has been done. A sand supply hopper 18 is provided vertically above the vibration table 15 and has a slide gate that can be opened and closed at the supply port at the lower end.The sand supply hopper 18 is attached to the portal frame 12, and 19 is a frame set position. This is the lower frame set on the lower model board 10 in the figure. Note that guide plates (not shown) are provided on the inner side of the gate-shaped frame 12 to regulate both sides of the truck frame 1 along the traveling direction of the truck A, and are used to position the truck A when it moves forward. They are starting to move around.

In order to manufacture a vacuum mold using the above-mentioned vacuum mold making apparatus using the trolley device configured as described above, the upper model plate 9 and the lower model plate 10 are positioned and placed on the upper surface of the trolley frame 1, respectively. After that, the film is pulled out from a film roll (not shown) provided on one side of the film forming device 11 and is placed under tension on the lower surface of the holding frame 14, and the heater of the film heating device 13 is activated to heat the holding frame 14. The film on the lower surface is softened, and then this film is closely attached to the surface of the upper model plate 9 on the upper surface of the truck frame 1 while applying a depressurizing action,
Next, the pair of motors 2 and 2' with reduction gears are rotated in opposite directions to rotate one drive wheel 4 in the normal direction and rotate the other drive wheel 4' in the reverse direction. Since the bogie rotates stably 180 degrees clockwise under the guidance of the swivel wheel 7 using the support rod 5, which is vertically installed on the frame 1 and whose lower end is engaged with the base end of the guide member 6, as a fulcrum, The upper model plate 9 placed on the frame 1 is rotated to a frame setting station RO, and the lower model plate 10 is rotationally moved to a film forming station immediately below the film forming apparatus 11. Therefore, after setting the upper frame on the upper model plate 9 of the frame setting station, the motors 2 and 2' are again rotated in opposite directions to move the truck A to the drive wheels 4 and 4'.
The upper frame set on the upper model plate 9 is rotated to the film forming station 1 by rotating it 180 degrees counterclockwise under the driving of the swivel wheel 7 and the guiding movement of the swivel wheel 7.
Next, the pair of motors 2 and 2' are both rotated in the normal direction to drive the drive wheels 4 and 4' and move the bogie A under the travel guidance of the swivel wheel 7 until the support rod 5 and the guide member 6 are engaged with each other (not shown). It is moved forward in a stable state while being guided by a guide plate, and the upper frame set on the upper model plate 9 is moved forward to the sand supply station directly above the vibration table 15. Next, compressed air is supplied to expand the air spring 17 and the vibration table 1 is expanded.
5 and lift the upper model plate 9 above the trolley frame 1, and open a slide gate (not shown) on the lower surface of the sand supply hopper 18 to place the upper model plate 9 into the upper frame aligned with the upper model plate 9. The vibration table 15 is turned on by the operation of a vibration motor (not shown) attached to the bottom surface of the vibration table 15.
vibrate to sufficiently fill the molding sand in the upper frame,
After filling, the motors 2 and 2' are operated in reverse at the same time, and the drive wheels 4 and 4' are rotated in the reverse direction, so that the upper frame, inside of which is filled with molding sand, is moved back to the film forming station 1 under the travel guidance of the swivel wheel 7. , a film sheet is placed on the upper surface of the upper frame while reducing the pressure in the upper frame to exert a depressurizing effect on the molding sand in the upper frame, and after the molding sand in the upper frame is solidified under negative pressure, a motor 2 with a reduction gear is installed;
2' are rotated in opposite directions, and the drive wheels 4 and 4' are simultaneously driven in opposite directions to stably rotate the trolley A clockwise 180 degrees under the travel guidance of the swivel wheel 7. The upper frame holding the reduced pressure mold is rotated to the frame setting station, and the negative pressure acting on the surface of the upper model plate 9 is released to release the upper frame and the upper model plate 9. Then, the upper mold is molded under reduced pressure. After this, motor 2, 2' again
are rotated in opposite directions to rotate the trolley A stably 180 degrees counterclockwise as described above, and the upper model plate 9 placed on the upper surface of the trolley frame 1 is placed on the film forming station A. Rotate and return to the initial starting state. On the other hand, the lower mold may be molded under reduced pressure by repeating the same operation as the upper mold while the upper mold is being molded using the lower model plate 10 placed on the other side of the truck frame 1. . In the embodiment described above, the motors 2 and 2' with reduction gears are provided on the lower surface of the bogie frame 1 so as to face each other on the same axis, and the drive wheels 4 and 4' are directly connected to the motor shafts. However, the motors with reduction gears may not be provided facing each other on the same axis, but may be attached to other parts so that the two drive wheels can be rotated independently in forward and reverse directions via a gear mechanism, etc. .

As is clear from the description of the embodiments described above, the present invention has a drive wheel and a swivel wheel which are independently rotated forward and backward, which are skillfully arranged at the bottom of a truck frame, and a truck having a support rod hanging thereon is supported by the truck. The guide member that engages the rod is installed on the base so that it can run freely and rotate forward and backward, so it can be used when moving workpieces into and out of the device body such as a molding device. It can not only move forward and backward in an extremely stable state, but also rotate.
Because the structure is simple, it is economical because the main body of the device such as the molding device can be made compact, and there is no need to dig a pit to lower the height of the main body of the device.
Furthermore, it has various effects such as improving productivity, and it has an extremely large impact on the industry.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an embodiment of the present invention, Fig. 2 is a partially cutaway side view, Fig. 3 is a partially cutaway plan view of the guide member portion, and Fig. 4 is a vacuum mold using the present invention. A front view showing the entire molding device, and FIG. 5 is a plan view of a conventional vacuum mold manufacturing device. A: Dolly, 1: Dolly frame, 4, 4': Drive wheels, 5: Support rod, 6: Guide member, 7: Swivel wheel,
8: Base.

Claims (1)

[Claims] 1 Near the center of the bottom of the bogie frame 1, a drive wheel 4 and a drive wheel 4' each having a motor and rotated in forward and reverse directions are arranged in symmetrical positions with respect to a support rod 5 vertically installed on the bogie frame 1. The trolley device is characterized in that a trolley A is provided with movable wheels 7 on both sides of the bottom and is movably installed on a base 8 on which a guide member 6 with which the lower end of the support rod 5 is engaged is laid.