JP2004223905A - Rubber sheet pitch-feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rubber sheet pitch-feeding device which is capable of smoothly pitch-feeding even rubber sheets with tackiness by preventing the rubber sheet from adhering to the constituent part of the device and feeding the rubber sheets at a specified pitch without slackening the rubber sheet. <P>SOLUTION: This rubber sheet pitch-feeding device feeds a continuous rubber sheet 3 in its longitudinal direction and has a first clamping device 1 and a second clamping device 2 arranged in rows in the rubber sheet 3 feed direction. In this device, a plurality of wires 4 are tensely stretched in the rubber sheet 3 feed direction and the rubber sheets 3 are fed over the wires 4 at a specified pitch P by the forward drive of the second clamping device 2 to be driven at a specified pitch P in a reciprocating fashion. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rubber sheet pitch feeder.
[0002]
[Prior art]
2. Description of the Related Art As a conventional feeding device for feeding an adhesive rubber sheet such as raw rubber before vulcanization at a predetermined pitch, there is a device for feeding a rubber sheet by operation of a claw arm means or the like (for example, see Patent Document 1). At this time, the rubber sheet is conveyed in a state of being placed on a flat pedestal portion or a roller type conveyor of the apparatus.
[0003]
[Patent Document 1]
JP 9-174654 A
[Problems to be solved by the invention]
However, since a rubber sheet such as raw rubber has an adhesive property on its surface, a conventional pitch feeder is liable to be caught by a conveying path or a component, and may hinder accurate pitch feed. Further, the rubber sheet is apt to be loosened, the rubber sheet is gradually loosened when the apparatus is stopped, and thereafter, when the apparatus starts a pitch feed operation, the rubber sheet is conveyed while being loosened, and the predetermined precision is maintained. There is a problem that the rubber sheet cannot be fed at the pitch.
[0005]
Therefore, the present invention provides a smooth rubber feed at a predetermined pitch without loosening the rubber sheet, even if it is a continuous rubber sheet having an adhesive property, by preventing adhesion to the component parts of the apparatus and performing smooth pitch feeding. It is an object of the present invention to provide a rubber sheet pitch feeder capable of feeding a rubber sheet.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a pitch feeder for a rubber sheet according to the present invention is a pitch feeder for a rubber sheet that feeds a continuous rubber sheet in a longitudinal direction thereof, and a first feeder in a feed direction of the rubber sheet. A clamp device and a second clamp device are arranged in line, a plurality of wires are stretched in the feed direction of the rubber sheet, and the wire is moved on the wire by the forward movement of the second clamp device reciprocally driven at a predetermined pitch. The rubber sheet is configured to be fed at the predetermined pitch.
Further, each of the first clamp device and the second clamp device has an upper clamp plate and a lower clamp plate for closing and clamping the rubber sheet on the wire from both sides, and the upper clamp plate is Adhesion prevention plates for dropping the rubber sheet adhering to the upper clamp plate during opening are arranged near the upstream side and near the downstream side of the upper clamp plate.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail based on the illustrated embodiments.
[0008]
FIG. 1 is a front view (a left half is broken) of an embodiment of a rubber sheet pitch feeder according to the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a plan view thereof. The work conveyed by the pitch feeder is, for example, a rubber sheet (sheet-like raw rubber) 3 before vulcanization, and this feeder has an excellent effect on a work having a sticky surface. Things. The rubber sheet 3 is wide (250 mm to 500 mm) with respect to the thickness (1 mm to 3 mm), and is a device for feeding the continuous rubber sheet 3 sequentially at a predetermined pitch P in the longitudinal direction.
[0009]
This pitch feeder includes a supply device (supply side A) for feeding a rubber sheet 3 wound in a roll shape (not shown) on the upstream side, and a rubber sheet 3 pitch-fed on the downstream side in the width direction. And a cutting device 8 (carrying-out side B). That is, the pitch feeder feeds the rubber sheet 3 from the supply side A to the downstream carry-out side B at a predetermined pitch P, and cuts the rubber sheet 3 one after another at the width of the pitch P. Then, the cut rubber sheet is conveyed to a mold (not shown) to produce a packing and a sealing material. The arrow E in FIGS. 2 and 3 indicates the feeding direction of the rubber sheet 3.
[0010]
In the pitch feeder, the first clamp device 1 and the second clamp device 2 are arranged in the feed direction of the rubber sheet 3 with an interval. Each of the first clamp device 1 and the second clamp device 2 has an upper clamp plate 5 and a lower clamp plate 6 which hold the horizontal rubber sheet 3 from both upper and lower surfaces. The upper clamp plate 5 and the lower clamp plate 6 are long block bodies having a width dimension (longitudinal dimension) longer than the width dimension of the rubber sheet 3, each having a horizontal clamp surface 24 and a clamp surface 26, These are arranged to face each other.
The first clamp device 1 is fixed to the gantry 9 of the device, and the second clamp device 2 is arranged at a predetermined pitch P with respect to the gantry 9 by drive means and operation control means (not shown). The reciprocating drive (sliding movement with respect to the rail member 14) is configured. That is, the second clamp device 2 can be approached and separated from the first clamp device 1.
[0011]
Further, in the pitch feeder, a plurality of wires 4 passing through the first clamp device 1 and the second clamp device 2 are stretched at predetermined intervals in the feed direction of the rubber sheet 3. The wire 4 guides the rubber sheet 3 while holding the lower surface of the rubber sheet 3. The wire 4 is stretched horizontally with tension between the start edge 10 and the end edge 11 which are fixed in the pitch feeder, and the tension holds the rubber sheet 3 horizontally.
The rubber sheet 3 is fed at a predetermined pitch P over the wire 4 by the forward movement (separation operation from the first clamp device 1) of the second clamp device 2 reciprocatingly driven at a predetermined pitch P. .
[0012]
More specifically, as shown in the cross-sectional view of the main part of the clamp device of FIG. 4, the wire 4 is connected between the upper clamp plate 5 and the lower clamp plate 6 of each of the first clamp device 1 and the second clamp device 2. The rubber sheet 3 is pinched together with the wire 4 by the closing operation of the upper and lower clamp plates 5 and 6.
Therefore, when the upper clamp plate 5 and the lower clamp plate 6 are in a closed state, the rubber sheet 3 is held in contact with the clamp surfaces 24 and 26 as shown in FIG. A relief groove 12 having a concave cross section in which the wire 4 is inserted is formed corresponding to the wire 4.
[0013]
In addition, the number of the wires 4 is plural and is five in FIGS. 1 and 3, and the interval G is fixed, but the number is not limited, and is changed according to the width dimension and thickness of the rubber sheet 3. It is free, and the interval G may be changed accordingly.
Further, the outer diameter of the wire 4 is preferably set to 1.0 mm to 1.5 mm. If the value is set to be less than the lower limit, the rubber sheet 3 is too thin and bites into the wire 4 to make slippage worse, making it difficult to feed the pitch and forming a deep flaw (groove) in the rubber sheet 3. On the other hand, if the value exceeds the upper limit, the weight of the wire 4 becomes large, the wire 4 itself becomes loose, and it becomes difficult to set the tension of the wire 4.
[0014]
The wire 4 is a metal (stainless steel) wire rope (twisted wire) made by twisting a plurality of strands (consisting of a plurality of strands). Further, the wire 4 may be a stainless steel wire, which may be used bare, but is preferably a resin-coated wire coated with nylon, fluororesin or the like.
In addition, as shown in the explanatory view of the rubber sheet 3 on the wire 4 in FIG. 5, the rubber sheet 3 is placed on the convex portion 13 (strand) of the wire 4. The same applies to the case where the wire 4 is a resin-coated stainless wire, and the rubber sheet 3 is held by the top of a continuous wave shape (irregular surface shape) formed by the twisted shape of the wire 4 and the vicinity thereof. That is, the wire 4 and the rubber sheet 3 are not in contact with each other.
[0015]
Therefore, according to the wire 4 of the present invention, the smooth surface condition of the wire 4, an appropriate contact surface pressure, and the surface shape of the wire 4 having the twisted direction slightly inclined with respect to the feeding direction of the rubber sheet 3, Even with the adhesive rubber sheet 3, the contact resistance is reduced and the rubber sheet 3 can be smoothly pitch-fed.
[0016]
Next, the feeding operation of the rubber sheet will be described with reference to the cross-sectional views of the main parts of the pitch feeding device shown in FIGS. Reference numerals 15 and 16 in the figure denote an upper clamp plate and a lower clamp plate of the first clamp device 1, and reference numerals 17 and 18 denote an upper clamp plate and a lower clamp plate of the second clamp device 2.
First, as shown in FIG. 6A, the first clamp device 1 on the upstream side is in a closed state, and the second clamp device 2 on the downstream side is in an open state. Next, the second clamp device 2 is closed (b), and the first clamp device 1 is open (c).
[0017]
Then, as shown in FIG. 7D, the first clamp device 1 is moved forward (forward) by a predetermined pitch P while the second clamp device 2 is opened and the second clamp device 2 is closed, and the rubber sheet 3 is moved by the pitch P. Convey downstream. Thereafter, the first clamp device 1 is closed (e), and the second clamp device 2 is opened (f).
Thereafter, as shown in FIG. 8 (g), the rubber sheet 3 is cut in the width direction by the cutting device 8 while the first clamp device 1 is in the closed state, and the strip-shaped rubber sheet 19 is obtained (h). That is, the strip-shaped rubber sheet 19 has the same size as the feed pitch P.
[0018]
Thereafter, the second clamp device 2 moves backward (retreats) by a predetermined pitch P, returns to the initial state of FIG. 6A, repeats the above cycle, and sequentially feeds the rubber sheet 3 at the predetermined pitch P to form a strip. The rubber sheet 19 is formed.
At the time of cutting by the cutting device 8 (in the state of FIG. 8 (g)), the second clamp device 2 may be in the closed state. Further, in this cycle, at least one of the first clamp device 1 and the second clamp device 2 is always in the closed state, so that the rubber sheet 3 does not rewind to the supply side A.
[0019]
Next, a description will be given of the opening / closing drive means 20 provided in the first clamp device 1 and the second clamp device 2 to open and close the upper clamp plate 5 and the lower clamp plate 6, respectively. The configuration and operation of the driving means 20 are common (same) to the first and second clamping devices 1 and 2, and the above operation is performed by controlling the opening / closing timing by a control means (not shown). I have.
[0020]
The opening / closing drive means 20 is provided at the ends of the upper and lower clamp plates 5 and 6 of a substantially rectangular parallelepiped (total plate shape). A regulating member 23 having a stopper portion 22 disposed at a substantially intermediate height position and regulating the vertical movement of the upper and lower clamp plates 5 and 6 by abutting. The upper clamp plate 5 is fixed to the rod end of the fluid cylinder 21 and the lower clamp plate 6 is fixed to the cylinder body side. As shown in FIGS. First, the upper clamp plate 5 is pulled down and lowered by the contraction operation of the upper clamp plate 5, and when the upper clamp plate 5 abuts on the stopper portion 22, the lower clamp plate 6 is suspended along with the cylinder main body and rises to rise to the stopper portion 22. Abut. Then, in this state, the upper and lower clamp plates 5 and 6 are in the closed state in which the rubber sheet 3 is sandwiched.
[0021]
In other words, the opening / closing drive unit 20 causes the upper clamp plate 5 and the lower clamp plate 6 of the first clamp device 1 (and the second clamp device 2) to close and clamp the rubber sheet 3 on the wire 4 from both sides. A pair of upper and lower clamp plates 5 and 6 are sequentially brought into contact with the rubber sheet 3 by one fluid cylinder 21 without providing driving means (fluid cylinders) for the upper and lower clamp plates 5 and 6 respectively. 3 can be clamped from above and below. In the present invention, the opening / closing drive means 20 is provided at both ends of the upper and lower clamp plates 5 and 6 so that the upper and lower clamp plates 5 and 6 are always stably maintained in a horizontal state. Opening and closing operation smoothly.
[0022]
Further, the pitch feeder of the present invention drops (peels off) the rubber sheet 3 adhered to the upper clamp plate 5 while the upper clamp plate 5 is being opened, as shown in FIGS. A pair of metal adhesion preventing plates (baffle plates) 7, 7 are arranged near the upstream side and near the downstream side of the upper clamp plate 5.
The adhesion preventing plate 7 is disposed in parallel along the entire length of the upper clamp plate 5 in the longitudinal direction (the width direction of the rubber sheet 3), and is made of stainless steel or the like. The thickness of the anti-adhesion plate 7 is small (1.5 mm to 3 mm), and the lower end surface 25 of the anti-adhesion plate 7 is sufficiently lower than the horizontal clamp surface 24 when the upper clamp plate 5 is in the open state. And a position slightly above the upper surface of the rubber sheet 3.
[0023]
Then, when the upper clamp plate 5 rises with the rubber sheet 3 adhered to the clamp surface 24 of the upper clamp plate 5, as shown in FIG. The upper surface comes into contact, and the contact area between the adhesion preventing plate 7 and the rubber sheet 3 is small, so that the rubber sheet 3 does not catch on the adhesion preventing plate 7, and the upper clamp plate 5 further rises and the rubber sheet 3 Fall away from. That is, when the upper clamp plate 5 moves in the opening direction, even if the rubber sheet 3 is stuck on the clamp surface 24, the adhesion preventing plate 7 can automatically scrape the rubber sheet 3 off. Further, the lower end surface 25 of the adhesion preventing plate 7 is chamfered so that the rubber sheet 3 is not damaged.
[0024]
Further, even if the rubber sheet 3 is stuck on the clamp surface 26 of the lower clamp plate 6 while the lower clamp plate 6 is being opened, the rubber sheet 3 is placed on the wire 4 and is regulated by the wire 4. , Peels off immediately.
In addition, the clamp surfaces 24 and 26 of the upper and lower clamp plates 5 and 6 are coated with a resin (fluorine resin processing), so that the rubber sheet 3 is hardly caught.
[0025]
【The invention's effect】
The present invention has the following effects by the above configuration.
[0026]
According to the first aspect, the slack of the rubber sheet 3 can be prevented between the first clamp device 1 and the second clamp device 2 which reciprocates, and the rubber sheet 3 can be accurately moved at a predetermined feed pitch P. Can be sent to
Further, even if the rubber sheet 3 is unvulcanized and has tackiness, the wire 4 can hold the rubber sheet 3 appropriately without being in close contact with the rubber sheet 3, and the rubber sheet 3 can be easily formed. Can pitch feed.
As a holding means between the first clamp device 1 and the second clamp device 2, the structure is very simple and effective, and the arrangement of the wire 4 can be easily performed by adjusting the tension.
[0027]
When the upper and lower clamp plates 5 and 6 are closed for a long period of time and then opened, even if the rubber sheet 3 is pulled up by the upper clamp plate 5 due to its adhesive force, the rubber sheet 3 is lifted. The rubber sheet 3 can be scraped off automatically without affecting the feeding operation of the rubber sheet 3.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a rubber sheet pitch feeder according to the present invention.
FIG. 2 is a side view of the pitch feeder.
FIG. 3 is a plan view of the pitch feeder.
FIG. 4 is a sectional view of a main part of the clamp device.
FIG. 5 is an explanatory view of a rubber sheet on a wire.
FIG. 6 is a cross-sectional view of a main part of the pitch feeding device for explaining a feeding operation of the rubber sheet.
FIG. 7 is a cross-sectional view of a main part of the pitch feeding device for explaining a feeding operation of the rubber sheet.
FIG. 8 is a cross-sectional view of a main part of the pitch feeding device for explaining a feeding operation of the rubber sheet.
FIG. 9 is a front view of a main part of the clamp device for explaining the operation of the upper and lower clamp plates.
FIG. 10 is a side view of the clamp device for explaining the operation of the adhesion preventing plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 First clamp device 2 Second clamp device 3 Rubber sheet 4 Wire 5 Upper clamp plate 6 Lower clamp plate 7 Adhesion prevention plate P Pitch

Claims (2)

A rubber sheet pitch feeder for feeding a continuous rubber sheet (3) in its longitudinal direction, comprising a first clamp device (1) and a second clamp device (2) in the feed direction of the rubber sheet (3). A plurality of wires (4) are stretched in the feeding direction of the rubber sheet (3), and the wires are moved forward and backward at a predetermined pitch (P) by the forward movement of the second clamp device (2). (4) A pitch feeding device for a rubber sheet, wherein the rubber sheet (3) is fed at the predetermined pitch (P). Each of the first clamp device (1) and the second clamp device (2) performs a closing operation, and an upper clamp plate (5) for clamping the rubber sheet (3) on the wire (4) from both sides. A lower clamp plate (6), and an adhesion preventing plate (7) (7) for dropping the rubber sheet (3) adhered to the upper clamp plate (5) while the upper clamp plate (5) is being opened. 2. A pitch feeder for a rubber sheet according to claim 1, wherein said upper clamp plate is disposed near an upstream side and a downstream side.

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