JPH04279319A - Method for joining of sheet - Google Patents

Abstract

PURPOSE:To obtain a good join line by making a portable small joining apparatus easily movable and making the distance of movement of the apparatus easily controllable in the case where rubber sheets each with a wide area used for preventing a roof of a building, the bottom of a lake, a waste treating lot, etc., from leakage of water are thermocompression-bonded together every short distance such as 1-2m by means of the joining apparatus. CONSTITUTION:Two sheets to be joined are spread and arranged in such a way that the end edge parts are overlapped and a plurality of guide rails for a truck are laid on one of the sheets in series and in parallel with the end edge of the sheet and the joining apparatus is moved on these guide rails every specified length by means of the movable truck and the guide rails on which the truck has passed are taken out and are laid successively in order again in the front of moving direction of the truck.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] This invention relates to a method for joining sheets, and particularly to wide rubber sheets used for preventing water leakage on the roofs of buildings, the bottoms of ponds, waste disposal sites, etc. The present invention provides a sheet joining method suitable for joining sheets by thermocompression bonding on site.

0002

[Prior Art] In order to prevent water leakage from the roof of a building, the bottom of a pond, a waste disposal site, etc., a long rubber sheet with a thickness of 1 to 2 mm and a width of 1.2 m is cut into a length of about 10 m. A large number of them are stacked and joined at the side edges to make a width of 10m and a length of 100 to 20m.
A long rubber sheet with a width of about 0 m is made, rolled into a roll, transported to the construction site, and then joined vertically and horizontally to form a sheet with the required area.

[0003] As a joining device for joining wide and long rubber sheets at the above-mentioned construction site, it consists of an elongated lower bed with a length of 1 to 2 m and an upper bed that can be raised and lowered. It is known that the edges of two rubber sheets are overlapped and sandwiched between them, and the rubber sheets are pressurized and heated to be vulcanized and bonded. Conventionally, the two wide and long rubber sheets described above are spread out and lined up so that their edges to be joined overlap, and the joining device is placed on one of the rubber sheets parallel to the edges of the rubber sheets. The edges of the two rubber sheets are glued together, and then this bonding device is moved laterally by a predetermined length determined by the length of the hot plate and bonded in the same way. The entire length of the edge was joined.

0004

[Problem to be Solved by the Invention] However, in the past, when rubber sheets were bonded for a predetermined length, the heavy bonding device had to be lifted by the worker and moved sideways each time. It takes a long time, and it is difficult to control the position at which the joining device is lowered, which may result in excessive or insufficient movement distance, and the joining device may be tilted to the edge of the rubber sheet after being moved, resulting in damage to the rubber sheet. There have been disadvantages such as unbonded portions occurring on the bonding line, zigzag formation of the bonding line, and wrinkles occurring at the bonding portion.

[0005] This invention makes it easy to move the joining device and control the moving distance by laying a rail near the edge of the rubber sheets to be joined and moving the joining device along the rail. to obtain a good bond line.

[0006]

[Means for Solving the Problems] A method for joining sheets according to the present invention involves spreading and arranging two sheets to be joined so that their edges overlap, and placing a portable joining device on one of the sheets. The joining device is moved parallel to the edges of the sheets by a predetermined length, and when the joining device is stationary, the edges of the two sheets are stacked and sandwiched between the lower bed and the upper bed of the joining device. , in a method of joining sheets by applying pressure and heat to bond them, a plurality of sets of guide rails for bogies having a predetermined length are laid in series and parallel to the edge of the sheet on one of the sheets, The above-mentioned joining device is moved by a predetermined length by a cart movable on this guide rail,
Further, the guide rail is removed after the truck has passed and is reinstalled in order forward in the direction of movement of the truck.

The above-mentioned welding device consists of a horizontally long lower bed having an upper surface inclined with respect to the horizontal plane and an upper bed that can be raised and lowered with respect to the lower bed, and internal pressure is applied to the lower part of the inclined upper surface of the lower bed. An airbag that can be filled and forms a part of the inclined upper surface is provided, a hot plate in contact with the airbag surface of the lower bed is fixed to the upper bed, and the lower bed is mounted on a trolley. It is preferable that the The effective length of the press section consisting of the lower bed and the upper bed, in other words, the length of one bonding is preferably 1 to 3 m, and the length of the guide rail is 1.5 to 2.0 m of the lower bed. Double is preferred. and,
The guide rails may be such that the two sets are connected by mere butting, or may be provided with connectors at adjacent portions in the length direction.

[0008]

[Operation] According to the present invention, the welding device is sent laterally via a cart that can be moved along the guide rail, so the welding device can be moved more quickly and smoothly than the conventional method of lifting and transporting it by hand. The direction of movement is maintained parallel to the edge of the sheet, making it easy to control its stopping position and thus allowing high precision joining. In addition, since the guide rails of the parts that have been joined are reinstalled in the front part and a plurality of guide rails are used alternately, arbitrary lengths can be joined using a small number of guide rails.

[0009] If a joining device is used in which an airbag is fixed to the lower bed and a hot plate is fixed to the upper bed, the edge side of the sheet A on the side where the guide rail is laid, that is, one sheet A, is attached to the lower bed. Fold back onto the bed,
The edge side part of the other sheet B is overlapped on the lower half of the folded part, and the upper half of the folded part of one sheet A is further folded downward from above and overlapped with the edge side part of the other sheet B. , lower the upper bed on top of it and sandwich it,
By heating the hot plate, the top layer sheet (one sheet A) and the second layer sheet (the other sheet B) are formed.
can be joined.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS The sheet joining apparatus used in the present invention is comprised of a horizontally long lower bed 10 and an upper bed 20, as shown in FIG. The lower bed 10 has an inclined upper surface 11 having an inclination angle of about 45 degrees with respect to the horizontal plane, and an airbag 16 that can be filled with internal pressure forms a part of the inclined upper surface 11 near the lower part of this inclined upper surface 11. It is set in. The upper bed 20 also has two arms 2.
1 and 21 in the form of a hinge on the back surface of the lower bed 10, and a heating plate 2 is attached to the lower surface of the upper bed 20.
6 (see FIG. 2) is fixed.

As shown in FIG. 2, the lower bed 10 is made into a cylindrical shape with a right-angled triangular cross section by bending and welding plate materials, and the sloped portion thereof sandwiches the upper surface 11 and the right-angled portion. One plane forms the bottom surface 12 and the other plane forms the back surface 13. A horizontally long depression 14 is provided on the inclined upper surface 11 near the bottom, and a rubber airbag 16 is inserted into the depression 14 via a spacer 15.
is attached, and the surface of the airbag 16 forms substantially the same plane as the portion of the above-mentioned inclined upper surface 11 above the airbag 16. Further, a locking groove 11a is provided in the inclined upper surface 11 along the upper edge of the airbag 16.
is formed. Note that a compressed air supply pipe (not shown) is connected to the airbag 16 described above.

[0012] On the inside of the lower bed 10, a plurality of triangular reinforcing plates 17 for supporting the airbag 16 are fixed at desired intervals, and on the back surface 13, a pair of left and right back supports are fixed. A plate 18 is provided to protrude rearward, and feet 19 are provided on each lower surface of the back support plate 18 and the lower bed 10.
is fixed. The mounting arm 21 of the upper bed 20 is attached to the pin 2 on the back support plate 18 of the lower bed 10.
2, and an upper bed 20 is fixed between the lower surfaces of the tips of the left and right arms 21, 21.

The upper bed 20 is made by bending a plate and having a U-shaped cross section fixed downward, and has a heat insulating layer 2 made of asbestos material inside it.
A heater 25 and a hot plate 26 are fixed via 3 and 24. A handle 2 is attached to the upper surface of the tip of the arm 21.
7 is fixed, a pin hole 21a is bored in the opposite base side, and a pin hole 18a is bored in the back support plate 18 of the lower bed 10, and the upper bed 20 is rotated counterclockwise by rotating the arm 21 counterclockwise. Lower bed 10 as shown by the dotted line
When stacked, both pin holes 18a and 21a overlap,
By inserting pins (not shown), the upper bed 2
0 is fixed on the lower bed 10.

A seat fixing jig 30 shown in FIG. 3 is detachably provided on the inclined upper surface 11 of the lower bed 10. In this embodiment, the base plate 31 is made of a horizontally long plate with an L-shaped cross section, and is provided with a downward protrusion 32 along its front edge, and two sheets A and B are elastically attached to the upper surface of the base plate 31. A plurality of clamping tools 33 that can be clamped are fixed.

The structure of the above bonding device is disclosed in Japanese Patent Application No. 2-169.
The structure is similar to that described in the specification of No. 183, but when used in this invention, the lower bed 10 is attached to the trolley 4.
Fixed above 0. This truck 40 is equipped with a total of four wheels 41 on the front, rear, left and right sides of the lower surface, and these wheels 41 fit into grooves of a guide rail 42 and roll. The guide rails 42 have a length that is 1.5 to 2 times the total length of the lower bed 10, and two of the guide rails 42 are connected at a predetermined interval by a connecting plate 43. However, this connecting plate 4
3 is provided so that one end thereof is recessed from the guide rail 42 and the other end protrudes from the guide rail 42, and when connecting the guide rails 42 in the length direction, the protruding part of one end is fitted into the recessed part of the other end. will be combined.

In the above structure, as shown in FIG.
Rubber sheets A and B, with one rubber sheet A on top,
Then, as shown in FIG. Pull it out, fold it upwards, match the fold lines on both sides, and then insert the other rubber sheet B.
The bent end Db of one rubber sheet A is the bent end Db of one rubber sheet A.
The rubber sheet A is stacked on the fold line side of the rubber sheet A, and then the end Dc of one rubber sheet A protruding from the edge of the other rubber sheet B is bent (see FIG. 6) and stacked on the other rubber sheet B.

Next, the three-layered portion W, in which the edge of the other rubber sheet B is inserted inside the bent end Dc of the one rubber sheet A, is stretched to a predetermined length, for example, 1.2 m, 2.5 m.
The sheet fixing jig 30 is attached to the three-layered portion W by holding it with the holding tool 33 of the sheet fixing jig 30 over a length such as 1 m (see FIG. 7), and then the sheet is released from the holding tool 33. A raw rubber tape G with a release paper is sandwiched between the end Dc of one rubber sheet A and the end Db of the other rubber sheet B, and the release paper is peeled off, and the rubber sheet A,
The overlapping portion W of B is temporarily adhered with a raw rubber sheet G, and the overlapping portion W of the rubber sheets A and B is tilted from the rubber sheet A side to the B side together with a sheet fixing jig 30.

Next, a plurality of guide rails 42, for example four sets, are laid in series on the rubber sheet A and parallel to the edge of the rubber sheet A (see FIG. 1).
The joining device is placed on top via the trolley 40, the overlapping portion W of the rubber sheets A and B is transferred to the inclined upper surface 11 of the lower bed 10, and the sheet fixing jig 30 is lowered along the upper surface 11. As shown in FIG. 2, the protrusion 32 on the lower surface of the base plate 31 fixed to the seat fixing jig 30 is fitted into the locking groove 11a on the upper surface 11 of the lower bed 10. The fixture 30 is fixed to the lower bed 10.

Thereafter, the upper bed 20 is lowered and the hot plate 26 of the upper bed 20 is brought into close contact with the edge side of the rubber sheet A on the lower bed 10, and the pin holes 21a of the arm 21 and the back support plate 18 are closed. Insert a pin (not shown) into the pin hole 18a to fix the upper bed 20,
After that, an electric current is passed through the heater 25 of the upper bed 20 to heat the hot plate 26, and at the same time, air is sent to the airbag 16 and the overlapping portion W of the rubber sheets A and B on the airbag 16 is heated.
is heated and pressurized, and the raw rubber sheet G is vulcanized to bond the above-mentioned rubber sheets A and B together.

After the above adhesion is completed, the rubber sheets A and B are
The unbonded part of the sheet is bent in the same manner as above, and the sheet fixing jig 30 removed from the already bonded part is attached to the newly formed overlapping part W of rubber sheets A and B. The attachment portion of the rubber sheet B is turned over to the side of the rubber sheet B, and the above-mentioned bonding device is moved to the opposite position using the trolley 40, and the rubber sheets A and B are bonded together in the same manner as described above. Thereafter, repeat this process, and if the guide rail 42 at the front in the moving direction of the trolley 40 disappears, or if the guide rail 42 remains on the rear side where the adhesive is finished, move this rear guide rail 42 forward as appropriate and lay it. Try again.

In this embodiment, an air bag 16 is installed on the inclined upper surface 11 of the lower bed 10, and a hot plate 2 is installed on the upper bed 20.
6 are fixed respectively, and when placing the folded part of one of the rubber sheets A folded in half on the inclined upper surface 11 of the lower bed 10,
Since the fold line is facing upward, the edge side is the upper layer, and the edge is facing downward, the edge of the other rubber sheet B is sandwiched inside the folded part of one rubber sheet A. When the raw rubber sheet G is sandwiched between one rubber sheet A of the top layer and the other rubber sheet B of the second layer, it is possible to visually check whether or not the raw rubber sheet G has slipped off. If there are any omissions, they can be corrected.

Further, a horizontal locking groove 11a is provided above the airbag 16, and the base plate 31 of the seat fixing jig 30 is clamped integrally with the base plate 31 at the bent portions of the rubber sheets A and B. It is fixed with a tool 33, and the protrusion 32 on the lower surface of this base plate 31
Since the bent portions of the rubber sheets A and B are fitted into the locking groove 11a, the bent portions of the rubber sheets A and B are connected to the inclined upper surface 1 of the lower bed 10.
1, the position is between the locking groove 11a and the protrusion 3.
2 is automatically set by mating. Therefore, the work of joining the sheets A and B becomes easier, the efficiency is improved, and the joint part is not bent or meandered or wrinkled, resulting in a good finish.

[0023]

[Effects of the Invention] As described above, this invention transports the welding device laterally via a cart that is movable along the guide rail, so the movement of the welding device is reduced compared to the conventional method of lifting and transporting it by hand. It is very easy to do so, its stopping position can be easily controlled, and the direction of the joining device is kept parallel to the edge of the sheet, thus allowing a high precision of joining. In addition, the guide rails of the joined sections are re-laid in the front section and multiple guide rails are used alternately, making it possible to join sheets over arbitrary lengths using a small number of guide rails. can.

[0024] If a joining device is used in which an air bag is fixed to the lower bed and a hot plate is fixed to the upper bed as shown in the embodiment, the edge of the rubber sheet is attached to the upper surface of the lower bed. When stacking the sheets A, the fold line of one sheet A faces upward, the edge faces downward, and the edge side part can be placed on the top layer, so one sheet of the top layer and the other of the second layer When a raw rubber sheet for adhesive is sandwiched between the raw rubber sheet G and the sheet G, it is possible to visually check whether the raw rubber sheet G has slipped off or not, and it is possible to correct the slippage if it occurs.

[Brief explanation of the drawing]

FIG. 1 is a perspective view illustrating an embodiment of the invention.

FIG. 2 is a cross-sectional view of an example of a sheet joining device.

FIG. 3 is a perspective view of the seat fixing jig.

FIG. 4 is a sectional view of sheets A and B in a spread state.

FIG. 5 is a cross-sectional view of sheets A and B with their respective ends bent.

FIG. 6 is a cross-sectional view of one sheet A with the end of the other sheet B sandwiched between them.

FIG. 7 is a cross-sectional view of seats A and B with seat fixing jigs attached to them.

[Explanation of symbols]

A: Rubber sheet B: Rubber sheet W: Overlapping part of sheets 10: Lower bed 11:Top surface 16:Airbag 20: Upper bed 26: Hot plate 30: Seat fixing jig 31: Base plate 32: Projection 33: Gripping tool 40: Trolley 41: Wheel 42: Guide rail

Claims (1)

[Claims] Claim 1: Spread two sheets to be joined so that their edges overlap, place a portable joining device on top of one of the sheets, and place the joining device parallel to the edges of the sheets. In a method of joining sheets, the edges of the two sheets are overlapped and sandwiched between a lower bed and an upper bed of the joining device, and are bonded by applying pressure and heating. , a plurality of sets of guide rails for bogies having a predetermined length are laid in series on one of the sheets and parallel to the edge of the sheet, and the above-mentioned joining device is carried out by a bogie movable on the guide rails. A method for joining sheets, which comprises moving the guide rail by a predetermined length, removing the guide rail after the truck has passed, and sequentially re-laying the guide rail in the forward direction in the direction of movement of the truck.