JPH07106818B2 - Sheet transfer guider - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention prevents the formation of vertical wrinkles on a sheet such as a foam sheet, a synthetic leather sheet, or a rubber sheet by tensioning the sheet in the width direction. The present invention relates to a sheet transfer guider that is transferred.

(Prior Art) Conventionally, a cross guider, a cross collector, or the like is known as this type of sheet transfer guider. These are those in which the both ends of the film or cloth are sandwiched by a pair of rotating rollers or discs whose surfaces are made of rubber, and they are transferred, but according to these guiders, for example, they have not yet been cooled and solidified. When used to transfer a sheet that is very soft and has elasticity, such as a synthetic resin foam sheet, both ends of the sheet sandwiched between the rollers and the disc are recessed to cause wrinkles, and the wall thickness is thin. There is also a problem that it is uneconomical because it will not be a product unless both ends are cut off because it becomes scratched or both ends are scratched.

Therefore, as a solution to this problem, for example,
There is known a sheet transfer guider as described in Japanese Patent Publication No. 46-26288. In this sheet transfer guider, a sheet guide groove is provided in the suction device, and a large number of suction holes communicating with a decompression chamber provided inside the suction device are formed in the bottom surface of the sheet guide groove. The moving belt provided with the ventilation holes is slidably provided in close contact with the bottom surface of the sheet guide groove. In order to use this sheet transfer guider, a pair of sheet transfer guiders are arranged so that the sheet guide grooves face each other, and synthetic resin foam that has not been cooled and solidified yet is placed in the sheet guide groove that is always in a depressurized state. It may be used by inserting both ends of the body sheet, etc. In this case, both side edges of the sheet are held while being attracted by the moving belt that slides in the guide groove at the same speed as the moving speed of the sheet. Since there is no contact friction with the bottom surface of the guide groove, there is an advantage that a product without wrinkles or scratches can be obtained, and this technology is effective for a widening transfer device such as a foam sheet. It was used.

(Problems to be Solved by the Present Invention) However, recently, it has been required to increase the speed and width of a sheet for widening and transferring the sheet, and in order to meet this requirement, the moving belt is rotated at a high speed. When the sheet is transferred at a high speed, the above-mentioned conventional technique cannot be adopted because of the following problems. That is, a moving belt provided with a large number of vent holes is stretched by rotational driving during long-term use and slips with the driving roller to cause uneven rotation. It becomes non-uniform, and therefore distortion occurs in the entire sheet.

If the moving sheet is thin and is not yet cooled and is in a state close to the molten state, it will be difficult to hold the side edges of the sheet, and the vacuum degree of the suction device will be increased. However, on the contrary, there is a problem that the side edge of the sheet bites into the suction hole of the moving belt, and as a result, the sheet is torn.

The present invention has been made to solve the above-mentioned problems, and the purpose thereof is to convey the sheet at a high speed without deforming or damaging the both ends of the sheet which has not been cooled and solidified yet. To provide a sheet transfer guider to obtain.

(Means for Solving the Problems) The sheet transfer guider of the present invention includes a hollow fixed shaft having a suction port and a jet port which communicate with a vacuum source and a cold air source, respectively, and is rotatable coaxially with the hollow fixed shaft. The roller is provided with a driving device for driving the roller. The inside of the roller is divided into a decompression chamber and a pressure chamber, and a sheet guide groove is provided in the body of the roller along the circumferential direction. Of the cylinder wall of the roller facing the guide groove, a large number of suction holes communicating with the suction port of the hollow fixed shaft through the pressure reduction chamber are formed in the cylinder wall on the pressure reduction chamber side. The body wall is characterized in that a large number of cold air ejection holes communicating with the ejection port of the hollow fixed shaft through the pressurizing chamber are formed.

(Operation) According to the present invention, when the end portion of the synthetic resin foam sheet which has not been cooled and solidified is inserted into the sheet guide groove of the rotating roller, the end portion of the sheet is guided by the sheet guide groove. In the groove, suction holes that are always in a depressurized state are sucked and held by the body wall on the side of the pressure reducing chamber where the holes are formed, and cooled by the cold air jet holes provided on the body wall of the sheet guide groove on the side of the pressure chamber. By being blown with air, it is transferred in a solidified state. Therefore, the sheet can be transported at the same speed as the rotation speed of the roller without causing scratches on the edge of the sheet.

(Example) Next, an example of the guider for sheet transfer of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment, in which 1
Is a hollow fixed shaft in which a suction port 11 and a jet port 12 communicating with the vacuum generation source side A and the cold air generation source B are bored, and are arranged in the vertical direction. The interior of the hollow fixed shaft 1 is a partition
It is divided into an exhaust path 14 and a cold air supply path 15 at the boundary of 13, and the suction port 11 communicates with the vacuum generation source side A through the exhaust path 14 and the jet port 12 has a cool air flow. It is adapted to communicate with the cold air source B via the passage 15.

Reference numeral 2 is a roller that is rotatably held around the hollow fixed shaft 1, and its body is composed of two substantially cylindrical bodies 21 and 22.
The roller 2 has a decompression chamber 3 and a pressure chamber 4 which are partitioned inside, and a sheet guide groove 5 is provided in the middle of the body of the roller 2 along the circumferential direction.

Reference numerals 23 and 24 denote flange-shaped rotary shaft portions formed by bearing bearings 6 respectively on the hollow fixed shaft 1. The lower end peripheral edge portion of the body portion 21 is fixed to the peripheral edge portion of a flange 25 provided on the rotary shaft portion 23. The upper end peripheral portion of the body portion 22 is fixed to the peripheral portion of a flange 26 provided on the rotary shaft portion 24.

Reference numeral 7 is a gear for rotating the roller 2, which is driven by an electric mechanism from an electric motor (not shown) in this example. Reference numeral 71 is a sprocket for transmitting rotational drive to another sheet transfer guider when a plurality of sheet transfer guiders are installed along the sheet transfer direction.

Inside the roller 2, a disk-shaped partition plate 8 is provided.
It is fixed to the outer periphery of the partition 13 between the suction port 11 and the ejection port 12 and does not rotate. The partition plate 8 divides the space formed between the hollow fixed shaft 1 and the body portions 21 and 22 into two parts, forms the above-mentioned decompression chamber 3 between the partition plate 8 and the flange 25, and similarly to the flange 26. The pressurizing chamber 4 is formed between them.
The depressurizing chamber 3 and the pressurizing chamber 4 thus formed are rotated by providing O-rings 90, 91, 92 on the outer peripheral edge 81 of the partition plate 8 and the inner peripheral surfaces of the rotating shaft portions 23, 24, respectively. The seal is applied.

The sheet guide groove 5 is composed of the body walls 211 and 214 on the side of the pressure reducing chamber 3 and the body wall 221 on the side of the pressure chamber 4 described above, and the body walls 211 and 214 on the side of the pressure reducing chamber 3 are connected via the pressure reducing chamber 3. A large number of suction holes 212 ..., 213 ... Which communicate with the suction port 11 of the hollow fixed shaft 1 are respectively formed, and are hollow-fixed to the body wall 221 of the body portion 22 via the pressurizing chamber 4. A large number of cold air ejection holes 222 ... Which communicate with the ejection port 12 of the shaft 1 are formed.

The body walls 214 and 211 are formed integrally with the body portion 21 on the decompression chamber 3 side, and the other body wall 211 is formed integrally with the body portion 22 on the pressure chamber 4 side.

Thus, the body portions 21 and 22 formed separately are different from each other in the sheet guide groove 5, that is, in the portion where the body wall 211 of the body portion 21 and the body wall 221 of the body portion 22 face each other. Trunk wall 214 protruding from 211
The outer peripheral surface of the body is slidably inserted into the peripheral edge of the opening of the body wall 221 of the body portion 22 to be assembled. 16 is a sheet gap adjusting member 16 interposed between the hollow fixed shaft 1 and the rotary shaft 24.
With this, the flange 26 can be moved in the axial direction by using this, and as a result, the gap of the sheet guide groove 5 can be adjusted according to the thickness of the sheet 10.

Thus, the sheet transfer guider of the present invention is formed, but the present invention is not particularly limited to this, and the roller 2 has only the body wall 211 integrated with the body portion 21 on the decompression chamber 3 side. The body wall 214 may be integrally formed so as to project from the body wall 221 of the body portion 22 on the pressurizing chamber 4 side, or the body portions 21 and 22 may be guided by a sheet. It may be one roll which is connected by the groove 5 and is integrated.

In the embodiment described above, the depressurizing chamber 3 and the pressurizing chamber 4 are all suction holes 212, ...
.. and suction holes 213 ...
The suction / jetting is performed up to the portion that does not hold the sheet 10, but the one shown in FIG. 2 is configured so that suction or cold air is mainly jetted only to the portion that holds the end portion of the sheet 10.

That is, in the embodiment shown in FIG. 2, disk-shaped partition side plates 31 and 41 are provided in the depressurizing chamber 3 and the pressurizing chamber 4, respectively. As shown, the hollow fixed shaft 1 has a shielding block 32 that closes approximately 3/4 of the total number of suction holes 212.
When it is fixed to, the remaining approximately 1/4 of the holes are suction holes communicating with the decompression chamber 3. Further, as shown in FIG. 4, the partition side plate 41 has a shielding block 42 that closes approximately 3/4 of the total number of the cold air ejection holes 222 ..., and is fixed to the hollow fixed shaft 1. When this is done, the remaining portion of about 1/4 of the number of holes is used as a cold air ejection hole communicating with the pressurizing chamber 4. In this way, the suction holes 212
..., 213 ... and the cold air jet holes 222 ... where the unoccupied 1/4 number of holes are shown by two-dot chain lines in the end of the sheet 10 as shown in FIGS. 3 to 4. Suction near the edge 10a
Cool.

One partition side plate 31 is fixed to the hollow fixed shaft 1 similarly to the partition plate 8, while the other partition side plate 41 is slidably attached to the hollow fixed shaft 1. Then, a plurality of pillars 33 ... Protrudingly screwed to the partition side plate 31 are penetrated through the partition plate 8 and the partition side plate 41, and the partition side plate 41 is restricted from rotating by the pillars 33. is doing.

Reference numeral 43 is a pressure chamber formed between the partition side plate 41 and the flange 26, and the partition side plate 41 can be moved in the axial direction when pressure is applied from the separately installed pressure source C through the passage 17. If the pressure in the pressure chamber 43 is larger than the pressure in the pressure chamber 4, approximately 3/4 of the total number of the cold air jet holes 222 ... Is blocked, and in the opposite case, the trunk wall 221 and the shield are shielded. A gap is formed between the block 42 and the cool air jet holes 222 ... Therefore, depending on the usage condition, the sheet guide groove 5
May be partially cooled, or the whole may be cooled as in the embodiment shown in FIG.

In the examples shown in FIGS. 2 to 4, both the suction holes and the cold air jet holes are designed to close approximately 3/4 of the total number of holes. There is no particular limitation as it is appropriately determined depending on the relationship with the depth of the guide groove 5.

In any of the embodiments, the gap size of the sheet guide groove 5 is substantially equal to or slightly larger than the thickness of the sheet 10, which is effective for holding and transferring the sheet 10 without being strongly pinched. Target. In this case, the sheet guide groove 5 is
In order to reduce friction between the end of the sheet 10 to be transferred and the surface of each part forming the sheet guide groove 5, the surface may be a metal plated with chrome, or the sheet 10 to be transferred may be used. If the sheet is not cooled and is in a state close to a molten state and easily sticks to other objects, use those in which the surface of each portion forming the sheet guide groove 5 is coated with a non-adhesive substance such as fluororesin. Good.

Further, suction holes 212 ..., Suction holes 213 ...
Is a sheet 10 even if the decompression chamber 3 is in a low vacuum, as long as the portions other than the portion for holding and transferring the sheet 10 are closed.
The end of the sheet 10 can be sufficiently sucked and held in the sheet guide groove 5, and the end of the sheet 10 can be held without tearing.
It is to be transferred, and very good results can be obtained when it is used for expanding and transferring a very soft and brittle sheet such as a synthetic resin foam sheet.

Further, in each of the embodiments, an example in which the sheet is conveyed in the lateral direction is shown, but even in the case of conveying in the longitudinal direction, it can be used as it is if the entire apparatus is turned by 90 °.

Next, a mode in which a sheet is transferred using the above-described sheet transfer guider will be described based on the embodiment shown in FIG.

Therefore, in the sheet transfer guider of the present invention, at least one pair is made to face each other at an interval corresponding to the width of the sheet 10 to be transferred, and the sheet 10 is widened and transferred while holding both end portions of the sheet 10. For the sake of explanation, a mode in which one side end of the sheet 10 is held and transferred will be described as in the above-described embodiment.

The end of the sheet 10 is inserted into the sheet guide groove 5 of the rotating roller 2. Here, when the air in the decompression chamber 3 is exhausted from the suction port 11 to the vacuum generation source side A through the exhaust passage 14, the outside air passes through the suction holes 212 ... The sheet 10 is sucked into the chamber 3, and the end portion of the sheet 10 is attracted to the surfaces of the body walls 214 and 211 facing the sheet guide groove 5. Further, when the cooling air on the side of the cold air source B is press-fitted into the pressurizing chamber 4 from the jet port 12 through the cold air passage 15, the cooling air is jetted from the cold air jet holes 222 to cool the end portion of the sheet 10.

Thus, the end portion of the sheet 10 is transferred while being held by the body walls 214 and 211 facing the sheet guide groove 5 and being cooled from the body wall 221.

(Effects of the Invention) Since the present invention has the above-described configuration, by simply inserting the end portion of the sheet into the sheet guide groove of the rotating roller,
The end portion of the sheet is sucked and held by a large number of suction holes formed in the body wall facing the sheet guide groove, and a large number of cold air blowouts formed in the other body wall also facing the sheet guide groove. Since it is cooled and transferred by the cooling air from the holes, it is possible to transfer the sheet uniformly without causing slippage due to elongation due to rotational drive such as a moving belt and causing rotational unevenness during long-term use. Moreover, it is possible to uniformly transfer even when rotated at a high speed, and productivity can be improved.

Further, in the sheet guide groove, the end portion of the sheet is sucked and held through suction holes provided in the two body walls on the side of the pressure reducing chamber corresponding to the bottom portion and the side wall portion, and is also bored on the side of the pressurizing chamber. Further, since the sheet is cooled and transferred by the cooling air from a large number of cold air ejection holes, the vicinity of the edge of the sheet is not torn and it is extremely useful for widening and transferring a wide / thin sheet.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of a guider for transferring sheets of the present invention, FIG. 2 is a partially cutaway sectional view showing another embodiment of a guider for transferring sheets of the present invention, and FIG. 3 is III in FIG. FIG. 4 is a sectional view taken along line III-III and viewed in the direction of the arrow, and FIG. 4 is a sectional view taken along line IV-IV in FIG. Explanation of symbols 1 ... Hollow fixed shaft, 11 ... Suction port, 12 ... Jet port, 2 ...
… Roller, 21,22 …… Body, 211,214,221 …… Body wall, 212,
213 ... Suction hole, 222 ... Cold air jet hole, 3 ... Decompression chamber, 4
...... Pressure chamber, 5 ...... Sheet guide groove, A ...... Vacuum source,
B: Cold wind source

Claims (1)

[Claims] 1. A hollow fixed shaft having a suction port and a jet port respectively communicating with a vacuum source and a cold air generating source, a roller rotatably installed coaxially with the hollow fixed shaft, and a driving device for driving the roller. The inside of the roller is divided into a decompression chamber and a pressurization chamber, and a sheet guide groove is provided in the body of the roller along the circumferential direction, and among the body walls of the roller facing the guide groove. , A large number of suction holes communicating with the suction port of the hollow fixed shaft through the decompression chamber are formed on the decompression chamber side, and the decompression chamber side is fixed through the pressurizing chamber on the decompression chamber side through the pressure chamber. A sheet transfer guider, characterized in that a large number of cold air blowout holes communicating with the jet outlet of the shaft are formed.