JPH0645181B2 - Feeder for synthetic resin sheet - Google Patents

Description

TECHNICAL FIELD The present invention relates to a feeding device for a synthetic resin sheet, and more specifically, feeding the sheet in a state of being clamped to a forming portion of a forming device to perform forming processing or the like. The present invention relates to a feeding device that can be released from a clamped state and returned to an original position after completion.

<Prior Art and Problems to be Solved by the Invention> Many of the conventional feeders for synthetic resin sheets in molding apparatuses or the like pierce pins attached to the entire circumference of the endless chain from the lower ends of both side ends of the sheet, and There was something to do from

Further, as another seat clamping means, there has been one in which the seat is pressed against the support piece on the lower side of the seat attached to the entire circumference of the endless chain and the clamp claws attached to the movable piece on the upper side of the sheet.

However, in the former case of pinching and feeding by pin piercing, when the sheet is formed by the forming die, both side edges of the sheet are easily pulled in and easily come off from the sandwiched portion, so that both side edges of the sheet with respect to the transfer direction. When a sheet is wavy or uneven in thickness, it often comes off, or when the sheet is fed, it slips off if the sheet is not inserted straight.

On the other hand, in the case of the latter means of pressing the seat support piece and the clamp claw attached to the movable piece, the clamping is relatively reliable, and there is no problem as in the former case, but the seat support piece is attached to the entire circumference of the endless chain. Therefore, a space is required, and the supporting piece also passes through the inside of the oven serving as a heating section, which requires a cooling means for the sheet supporting piece, resulting in high cost and troublesome maintenance.

Therefore, there has been a demand for a sheet feeding device that can feed the sheet easily and reliably, has high accuracy, and is inexpensive in terms of cost. The present invention aims to satisfy such a demand.

<Means for Solving the Problems> As a feeding device for achieving the above object, a main bar having left and right feeding bodies that can be moved back and forth along guide bars provided on both sides of the molding device is provided in a main cylinder. The feeding main body is provided with a holding mechanism including a support lower plate for the sheet and clamp claws that can hold only both side edges of the sheet between the support lower plate, and the clamp claw rotates about a fulcrum. It is connected to the sub-cylinder via a movable piece that is movably supported and tilts, and the clamp claw of the holding mechanism tensions the sheet outward when the feeding main body advances into the molded product of the molding device. However, it is characterized in that the clamp is operated and the clamp claw can release the clamp when it is retracted from the molding section or the like.

<Operation> According to the device of the above invention, when a sheet is fed, the sheet is fed to the forming apparatus while being clamped while being tensioned outward by the holding mechanism of the sheet supporting lower plate and the clamp claw in the feeding main body. After processing in the molding section or the like on the molding apparatus side, the gripping mechanism is released to return the gripping mechanism to the original position by the return action of the feeding main body section to prepare for the next feeding. In this way, the advance / retreat action of the feeding main body and the clamping action of the sandwiching mechanism of the sheet support lower plate and the clamp claws act in a timely manner for processing such as molding work to easily and reliably perform intermittent feeding of the sheet. I can do it.

<Embodiment> Next, an embodiment of the present invention will be described below with reference to the drawings.

(1) is a synthetic resin sheet such as a foamed resin sheet (hereinafter simply referred to as a sheet) (S) rewind portion, (2) is a sheet (S) guide portion, (3) and (3) are hot plates (30 ) (30) heating section, (4) (4) is a molding section having a mold (40) (40), these respectively a pair of upper and lower heating section (3) (3) and molding section (4) What is (4) Cylinder (50)
The press device (5) (6) having (50) (60) (60) can be operated up and down. (S) 'indicates a molded product.

(7) is a sheet feeding device for the heating sections (3) and (3) and the forming sections (4) and (4). This sheet feeding device (7) has been described with reference to FIGS. 1 to 3, and the left and right feeding main body parts (73) (73) are attached to the main bar (72) that can move forward and backward with the main cylinder (71). ) Are connected together. The left and right feeding main body parts (73) (73) are provided with a gripping mechanism (C) (C) for the seat (S).
(C) (C) is a seat support lower plate (74) that is located below the seat,
It has a clamp claw (75) located at the upper side of the seat.
The seat supporting lower plate (74) is connected to the left and right feeding main body parts (73) (73) which can be reciprocated by the main cylinder (71).
The feeding main body (73) (73) can reciprocate along the left and right guide bars (76) (76) and has a plurality of sub-cylinders (77) integrally. As shown in FIG. 3, (75) is pivotally supported about a fulcrum and is connected to the sub-cylinder (77) via a movable piece (78) which makes an arcuate locus and tilts. When the clamp is operated, the sheet can be crimped to the lower support plate (74) while tensioning the sheet outward. The guide bars (76) (76) are respectively held and fixed by the columns (8) (8) in the device.

(9) Determining the retracted position of the feeding main body (73) (73) whether it is a detector on the sheet (S) that can detect a mark at regular intervals or a detected portion of a part of the molding apparatus. There is.

In order to feed the sheet (S) by the above-described embodying device, the sheet (S) that has been fed out through the winding portion (1) and the guide portion (2) is the feeding main body of the feeding device (7). When the seat support lower plate (74) on the part (73) side and the clamp claw (75) at the tip of the movable piece (78) side due to the operation of the sub-cylinder (77) sandwich both sides of the seat (S). By the operation of the main cylinder (71), the feeding main body parts (73) (73) advance along the guide bars (76) (76) and are stopped. After the stop, the heating unit (3) (3) heats the sheet (S) by sandwiching the hot plates (30) (30) with the press device (5) and the sheet (S) at the forming unit (4) (4). The molding for S) is achieved by matching the molding dies (40) (40) by the press device (6).

After processing such as heating and molding, after moving the movable piece (78) from the sub-cylinder (77) to separate the clamp claw (75) from the seat support lower plate (74) and release the sheet clamp. , The main cylinder (71) is retracted, the feeding main body (73) (73)
Moves backward along the guide bars (76) (76), and when the mark (preprinted on the sheet (S) or the detected part of the molding device part is detected by the detection part (9), the feeding main body part ( 73) The backward movement of (73) stops at a predetermined position. After stopping, the sub cylinder (77) described above
By the action of the clamp claw (75) due to the operation of (3), the seat (S) is again sandwiched between the supporting lower plate (74), and the main body (71) is operated in the same manner as described above, and the feeding main body (73) (73 ) Is advanced, and the sheet for the next heating and molding should be delivered.

By repeating these operations, the sheet (S) can be intermittently fed as required for heating, forming, etc. (in some cases, a cooling process is included and heating and forming become three stations).

In practice, the power source of the feeding device may be a servo motor in addition to various cylinder mechanisms. Therefore, although the stop at the forward movement of clamping and feeding the sheet is the stroke end in the above cylinder, it is also possible to detect the forward stop position by a method of installing a detector in the case of the servo motor.

As the sheet to be fed, in addition to the foamed resin sheet, a non-foamed resin sheet, a foamed resin sheet laminated with a non-foamed resin film, or the like can be used, and various materials can be used.

<Effects of the Invention> The sheet feeding device according to the present invention has the following effects in use.

(1) The main bar, which has left and right feeding main body parts that can move forward and backward along the guide bars provided on both sides of the molding device, is connected to the main cylinder, so the structure is simple and it is possible to make it compact in a small space. Become.

(2) Of the support lower plate and the clamp claws that are a mechanism for holding the seat, the clamp claws are pivotally supported about a fulcrum and are connected to the sub-cylinder via a movable piece for tilting movement. When the sheet is clamped, it can be crimped while tensioning the sheet outward as shown in Fig. 3, so it can be clamped without being disengaged when the sheet is pulled in during molding,
Further, even if the way the sheet enters is slightly inclined, the sheet can be crimped well, and a good clamped state can be maintained even during molding.

(3) Since a good clamping state can be maintained with the minimum necessary clamping action, it is possible to eliminate the need to clamp an extra part of the entire circumference of the seat and achieve compactness.
The sub-cylinder for the holding mechanism can be located outside the seat, and the stain on the seat due to oil dripping from the sub-cylinder can be eliminated.

[Brief description of drawings]

FIG. 1 is a schematic plan view according to the present invention, FIG. 2 is a schematic front view, and FIG. 3 is a side view showing one side of a side feeding main body portion. (S) ... Sheet, (3) (3) ... Heating part, (4) (4) ... Molding part, (5) (6) ... Pressing device, (7) ... Feeding device, (73) (73) … Feeding main unit, (74)… Support lower plate, (75)… Clamp claw, (76)… Guide bar, (77)… Sub cylinder, (78)… Movable piece.

Claims (1)

[Claims] 1. A main bar having left and right feeding main body portions which can be moved back and forth along guide bars provided on both sides of a molding apparatus is connected to a main cylinder, and the feeding main body portion has a lower plate for supporting a seat. , Equipped with a gripping mechanism consisting of clamp claws capable of gripping only both side edges of the seat between this support lower plate,
The clamp claw is pivotally supported about a fulcrum and is connected to the sub-cylinder via a movable piece for tilting movement.The clamp claw of the holding mechanism is advanced when the feeding main body advances to the molding part of the molding apparatus. A feeding device for a synthetic resin sheet, characterized in that the clamp claw is clamped while tensioning the sheet outward, and the clamp claw can be released when retracted from a molding part or the like.