JPH0221209Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sheet transfer device in a sheet molding apparatus that holds and heats a synthetic resin sheet between molds.

Sheet molding equipment, which holds a synthetic resin sheet between molds and molds it into the desired shape, has a sheet transport device in front and behind it, which is moved intermittently to transport the sheet between the molds. , and carrying out after heating and molding are repeated. The sheet transfer device attaches and transfers a synthetic resin sheet between a pair of chains via pins, etc. The chains are held in a fixed position by only the pair of upper and lower rails shown in Figure 1. proceed. In the molding device, the sheet is held between molds and a portion of it is molded into a plate or other object, so that the sheet can be pulled toward the mold during molding. Therefore, during molding, the chain inclines inward, and even after molding is completed, the chain continues to move in almost the same state.
A large load is applied only to part of the chain and rail, causing severe wear in parts of the chain and rail.
The pins that support the seat will be in an inclined state. Therefore, if the sheet is stretched by the mold during molding, the sheet may float or separate from the pins, resulting in molding defects or the inability to mold. A problem arises.
Further, due to the above-mentioned wear, the movement of the chain becomes less smooth, resulting in problems such as a decrease in the dimensional accuracy of the width of one movement of the sheet, and an increase in wasted sheets.

The purpose of the present invention is to prevent the chain from tilting, ensure sheet formation, and move the chain smoothly.

The present invention has a pair of parallel chains and a pair of rails supporting both sides of the chain rollers.
and a sheet locking protrusion such as a pin attached to the chain, and a support roller attached to the chain, and the support roller is provided on the side in the direction of inclination of the axis of the support roller when the pair of chains are inclined toward each other. A guide rail supporting the rail is provided in a direction parallel to the rail.

This transfer device pierces both end edges of the sheet with locking protrusions, attaches the sheet between a pair of chains, and transfers the sheet. When a force is applied to each chain to incline toward each other during sheet forming,
This force is received by the guide rail via the support roller to prevent each chain from tilting.

An embodiment of the device of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a pair of frames facing each other with a U-shaped cross section, and a rail 3 is fixed to the upper surface of a lower arm 2 of the frames. 4 is a chain, and its roller 5 is placed on the rail 3. 6 is a support plate whose one end is fixed between each pair of connecting shafts of the chain 4, and whose other end is bent at a substantially right angle in the opposite direction to the chain 4;
A pin 7 for supporting the seat is erected on its upper surface. Reference numeral 8 is a bracket on the side opposite to the support plate 6, one end of which is fixed to a pin of the chain 4, and the other end of which is bent at a substantially right angle to the outside of the chain 4. A support roller 9 such as a needle bearing is mounted on the upper surface of the bracket.
is mounted with its axis vertical.

A rail 10 is disposed close to the upper side of the roller 5 and parallel to the rail 3, and is fixed to the upper arm 11 of the frame 1. A guide rail 12 is fixed to the upper arm 11 along with the rail 10 in parallel with the rail 10, and a support roller 9 is connected to the side surface opposite to the pin 7.

13 is a heating device, the inside of which is connected to a pair of chains 4
is passing. 14 is a molding device disposed above and below the chain 4, and 15 is a molding sheet.

In this example, a pin 7 is provided upright on the support plate 6, and the seat is secured to this.
The configuration of the locking protrusion may be arbitrary, such as making the support plate 6 straight and having its upper end shaped like a saw blade or the like so that the sheet can be locked.

To form the sheet 15, the pins 7 of a pair of chains 4, 4 are inserted into both ends of the sheet in the width direction, the sheet 15 is installed in a construction manner between the chains 4, 4, and the sheet 15 is transferred as the chains 4, 4 advance. . This sheet is heated by a heating device 13, and is held and molded by a molding device 14. In this case, since the sheet is stretched in its thickness direction, a force is applied to the pair of chains 4, 4 that pulls them toward each other. A mounted bearing roller 9 is supported on a guide rail 12 arranged and fixed on the inside thereof.
Therefore, the guide rail 12 prevents the chain 4 from tilting inward and the pin 7 from tilting via the bearing roller 9. When a force that pulls them inward acts on the chain 4, the support roller 9 comes into pressure contact with the guide rail 12, but as the support roller 9 rotates, the friction with the guide rail 12 is reduced. Since it is small and rotates smoothly, the chain 4 moves smoothly without tilting even when it is pulled inward. Therefore, problems such as separation of the sheet from the pins 7 during molding can be solved, and the sheet can be used without wasting it. Furthermore, in this example, since the guide rail 12 is located inside the support roller 9, the chain 4
The guide rail prevents the pin 7 from tilting and maintains the upright state, and also prevents the pair of chains 4, 4 from moving toward each other during molding even if the chain 4 and rails 3, 10 are worn. 12 prevents this, and the distance between the pins 7, 7 of the pair of chains 4, 4 is kept almost constant, so the width of the sheet can be kept unchanged, and the sheet can be formed more smoothly.

FIG. 4 shows another example in which the support roller 9 is attached to the lower surface of the bracket 8, so the guide rail 12 is arranged outside the support roller 9, and the chain 4
This prevents the slope from tilting.

FIG. 5 shows yet another example in which the support roller 9 is attached to the lower surface side of the support plate 6, so the guide rail 12 is arranged on the rail 3 side of the support roller 9.

Figure 6 shows that the support roller 9 is placed horizontally on the bracket 8.
In this case, the guide rail 12 is placed on the tip side of the pin 7 of the support roller 9 to prevent the chain 4 from tilting.

Effects of the invention In this invention, a support roller 9 is attached to the chain 4,
In addition, since the guide rail 12 is provided on the inclination direction side of the axis of the support roller 9 when the chain 4 is inclined, even if a force acting on the pair of chains 4, 4 to incline in the mutual direction, the guide rail 12 prevents the chain 4 from tilting via the support roller 9, and prevents partial wear of the chain 4 and the rails 3, 10. Therefore, since the pins 7 can be maintained in an upright state, even if the sheet becomes tensile during molding, the sheet will not separate from the pins 7, and molding can be performed smoothly. be. Since the support roller 9 rotates even when force is applied to the chain 4, it is possible to move the chain 4 smoothly, reducing errors in the stopping position of the sheet, and eliminating waste of synthetic resin sheets. may be possible to use.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a sectional front view of the main parts, FIG. 2 is a plan view, FIG. 3 is a front view of the molding device, and FIGS. 4, 5, and 6 are FIG. 6 is a sectional front view of different examples. 1... Frame, 3... Rail, 4... Chain, 6... Support plate, 7... Pin, 8... Bracket, 9... Support roller, 10... Rail,
12...Guide rail.

Claims (1)

[Scope of utility model registration request] A pair of parallel chain rollers are sandwiched and supported by rails from both sides, and have a protrusion such as a sheet locking pin attached to the chain, and a support roller attached to the chain, A transfer device for a synthetic resin sheet for molding, wherein a guide rail for supporting a support roller is provided in a direction parallel to the rail on the side in the direction of inclination of the axis of the support roller when a pair of chains are inclined toward each other.