JP2003321911A - Waterproof-sheet tension device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a waterproof-sheet tension device surely clamping a waterproof sheet, preventing a slip and simply conducting even the return operation of an initial state after a tensile operation. <P>SOLUTION: The tension device has a substrate 10, a clamper 20 composed of a pair of upper-lower clamping plates 20a and 20b slidably installed on the substrate before and behind and a rack 31 for the sliding operation of the clamper 20 and a pinion 32. Projecting stepped sections 22a and 22b are formed to clamping surfaces for each clamping plate, displacing places in the longitudinal direction. The substrate 10 is arranged on the side edge section of the lower waterproof sheet 3, the side edge section of the upper waterproof sheet 2 is arranged on the lower clamping plate and the side edge section of the upper waterproof sheet 2 is held to both clamping plates 20a and 20b by stepping the upper clamping plate 20b while the substrate 10 is pushed and fixed onto the lower waterproof sheet 3. The pinion 32 is rotated and operated under the state, and the clamper 20 is slid forwards together with the rack 31. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof sheet tensioning device for pulling a waterproof sheet to apply a predetermined tension when the waterproof sheet is stretched on a structure such as a flat roof or a pool.

[0002]

2. Description of the Related Art A technique for waterproofing by installing a waterproof sheet made of a soft synthetic resin on a waterproof surface of a concrete structure such as a flat roof or a pool is often employed.
In such a sheet waterproofing method, an insulating method is generally adopted in which only a required portion of the waterproof sheet is fixed to the concrete structure and many remaining portions are arranged in a state of being separated from the structure. There is.

In this insulation method, since the waterproof sheet may expand or contract due to the influence of temperature change and the like and wrinkles or slacks may be formed after the construction, it is necessary to apply a predetermined tension to the waterproof sheet. . For example, when the side edges of adjacent waterproof sheets are joined together, the upper side waterproof sheet is pulled and the side edge portion is overlapped and adhered to the side edge portion of the lower side waterproof sheet.

As a waterproof sheet tensioning device for pulling a waterproof sheet to apply tension, for example, Japanese Utility Model Publication No. 61-7315 is well known. This device includes a substrate that is tightly fixed on a waterproof sheet, a sheet gripping unit that is provided on the substrate and that is movable in the sheet pulling direction (front direction), and that pulls the sheet gripping unit forward. And a pulling operation means. In this device, the substrate is placed on the side edge portion of the lower sheet and closely fixed, and the side edge portion of the upper waterproof sheet is grasped by the sheet gripping means, and in that state, the sheet is pulled by the pulling operation means. Move the gripping means forward. Thereby, the upper waterproof sheet is pulled, the side edge portion thereof is arranged on the side edge portion of the lower waterproof sheet sheet, and the overlapping portions of both sheets are temporarily bonded.

Since such a waterproof sheet tensioning device can easily and quickly stretch the waterproof sheet, it is preferably used in the waterproofing method of the sheet. Especially in recent years, in consideration of environmental problems, there is an increasing tendency to use a polyolefin resin-based waterproof sheet instead of a polyvinyl chloride resin-based waterproof sheet. Since the coefficient of thermal expansion is larger than that of resin type, wrinkles and slack are more likely to occur, and the waterproof sheet tensioning device is indispensable.

[0006]

By the way, in the above-mentioned conventional waterproof sheet tensioning device, the sheet gripping means has a pair of clamp plates, and one clamp plate is screwed to the other clamp plate through the waterproof sheet. It is configured to be held in pressure contact with a vise mechanism such as feeding.

However, this sheet gripping means has two
Since the waterproof sheet is clamped and held by a single flat clamp plate, there is a problem that when the waterproof sheet is pulled, slippage occurs in the plate surface direction and scratches are formed on the sheet surface. When a scratch is formed on the surface of the sheet, not only the appearance is impaired, but also the scratched portion may serve as a starting point and the waterproofness may be destroyed.

Further, in the above-mentioned conventional waterproof sheet tensioning device,
When the waterproof sheet is pulled, the recoil of the waterproof sheet causes the substrate to be inadvertently lifted, so that the waterproof sheet cannot be pulled in a stable state and wrinkles or slack may occur. To prevent the board from floating, an operator may press the board down, but in that case, a separate operator is needed to press down the board, which requires a lot of manpower. Problem occurs.

Further, in the above-mentioned conventional tensioning device, the tensioning operation means is constituted by, for example, a winch mechanism, the sheet gripping means is attached to the tip of the rope wound around the winch drum, and the winch drum is rotated by operating the handle to rotate the rope. The sheet gripping means is retracted and moved by wrapping. For this reason, when returning the sheet gripping means to the original position after pulling the temporary waterproof sheet and temporarily adhering it, it is troublesome to rotate the winch drum in the reverse direction to unwind the rope and return the sheet gripping means to the original position. In addition to the complicated work, even when the clamp of the sheet gripping means is released, the troublesome work of loosening the screw of the vise mechanism is necessary, and there is a problem that it takes a lot of time to restore the initial state. ing. Especially when a waterproof sheet is installed in a wide range, since the waterproof sheet tensioning device is repeatedly used, it is necessary to repeatedly perform the troublesome initial state returning operation, resulting in reduced work efficiency. The problem occurs.

The present invention solves the above-mentioned problems of the prior art and allows the waterproof sheet to be reliably clamped while preventing slippage, and the waterproof sheet can be reliably stabilized while securely pressing the substrate even when working alone. It is an object of the present invention to provide a waterproof sheet tensioning device that can be pulled into a state and further can easily perform an initial state returning operation after a pulling operation to efficiently perform a sheet tensioning operation.

[0011]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a method for stacking the upper waterproof sheet with the lower waterproof sheet when overlapping the upper waterproof sheet with the lower waterproof sheet. A waterproof sheet tensioning device for pulling to the side, wherein a substrate whose upper and lower waterproof sheet is pulled in the front-back direction, a slide clamper slidably provided in the front-back direction on the substrate, and the slide clamper forward A pulling operation means for performing a slide operation, a slide direction restricting means for allowing the slide movement of the slide clamper to the front side and restricting a slide movement to the rear side, and a slide direction restricting means for the slide clamper to the rear side. Slide regulation releasing means for releasing the slide regulation of the slide clamper,
It has a lower clamp plate and an upper clamp plate whose front edge is pivotally connected to the lower clamp plate and which can be opened and closed with respect to the lower clamp plate. And a clamp surface of the upper clamp plate is provided with an upper convex step portion which is arranged at a position displaced in the front-rear direction with respect to the lower convex step portion, and the pulling operation means is provided on the substrate. It has a pinion rotatably provided in the front part, a rack whose rear end is fixed to the slide clamper in a state of being meshed with the pinion, and a handle for rotating the pinion. The upper edge of the upper waterproof sheet is stepped on by pressing the upper clamp plate while the upper edge of the upper waterproof sheet is placed on the lower edge of the upper waterproof sheet. While being clamped by both lower clamp plates, the board is pressed and fixed to the edge of the lower waterproof sheet, and in the pressed and fixed state, the pinion is rotated in the forward direction based on the operation of the handle. The gist is that the slide clamper is configured to slide forward through the rack.

In the waterproof sheet tensioning device of the present invention,
The upper and lower edges of the upper waterproof sheet sandwiched between the pair of clamp plates are wavy or zigzag-shaped because the upper and lower clamp plates are formed with a convex step on the clamp surfaces by shifting the position between the upper and lower sides. It can be clamped in a bent shape. Therefore, it is possible to sufficiently secure the holding force of the waterproof sheet in the pulling direction and prevent the waterproof sheet from sliding on both clamp plates.

Further, since the board is strongly pressed against the waterproof sheet by the operator's own load by stepping on the upper clamp plate, the board may float up from the lower waterproof sheet due to the reaction when the waterproof sheet is pulled. It is possible to prevent such problems.

By simply stepping on the upper clamp plate,
Since the clamping operation of the waterproof sheet by the clamper and the pressing and fixing operation of the substrate with respect to the waterproof sheet can be performed at the same time, even one operator can surely perform these operations.

Further, the regulation by the slide direction regulating means is released by the slide regulation releasing means and the slide clamper is slid to the original position, whereby the initial state can be restored.

In the present invention, a rear urging means for urging the slide clamper rearward is further provided, and in the state where the slide clamper is slid forward, the slide direction regulation is performed via the slide regulation releasing means. By releasing the slide restriction by means,
It is preferable that the slide clamper is configured to slide rearward by the biasing force of the rear biasing means.

That is, in this case, when the slide regulation by the slide direction regulating means is released, the slide clamper slides backward by the urging force of the rear urging means and automatically returns to the initial state.

Further, in the present invention, it is preferable that the lower and upper convex steps have a rectangular flat plate shape extending continuously in the left-right width direction.

That is, when this structure is adopted, slippage of the waterproof sheet with respect to both clamp plates can be prevented more reliably.

Further, in the present invention, one of the lower and upper convex steps is provided in plural at intervals in the front-rear direction, and the other convex step is adjacent to the adjacent one. It is desirable to adopt a configuration in which the protrusions are arranged correspondingly.

That is, when this structure is adopted, slippage of the waterproof sheet with respect to both clamp plates can be prevented more reliably.

Further, in the present invention, the sliding direction restricting means releases the engagement between the ratchet wheel fixed to the rotation shaft of the pinion and the outer peripheral teeth of the ratchet wheel at the time of forward rotation and at the time of backward rotation. A ratchet mechanism having a reverse rotation preventing claw to be engaged, wherein the slide regulation releasing means is constituted by a claw removing operation member for separating the reverse rotation preventing claw from an outer peripheral tooth of the ratchet wheel. It is more preferable to adopt it.

That is, in this case, the slide regulation of the slide clamper can be performed more reliably.

Further, in the present invention, it is more preferable to adopt a constitution in which a flip-up biasing means for biasing the upper clamp plate in the direction of opening upward is provided.

That is, in the case of adopting this structure, when the upper clamp plate is released, the clamp plate is opened by the urging force of the urging means, and the clamp plate automatically returns to the initial state. .

Further, in the present invention, the upper clamp plate is pivotally connected to the lower clamp plate in a state having play in the vertical direction, the upper clamp plate is closed, and the waterproof sheet is provided by the upper and lower clamp plates. It is even more preferable to employ a structure in which the upper and lower clamps are arranged substantially parallel to each other when the pivoting portion of the upper clamp plate is displaced upward when the clamp is clamped.

That is, in this case, when the waterproof sheet is sandwiched by the upper and lower clamp plates, the pivotal connection portion of the upper clamp plate is displaced upward, so that the upper and lower clamps are arranged substantially parallel to each other. It is possible to hold the waterproof sheet between the clamp surfaces of the plate with good balance.

Further, in the present invention, it is more preferable to employ a structure in which a handle is provided on the front upper surface of the substrate.

That is, in the case of adopting this structure, by lifting the substrate by holding the handle with the hand and holding it downward, it is possible to more surely prevent the substrate from rising and use the handle. As a result, it is possible to easily carry the pulling device itself and carry out the transfer work.

Further, in the present invention, it is even more preferable to adopt a constitution in which a backing piece of the above-mentioned substrate is provided with a biting piece which bites into the surface of the waterproof sheet.

That is, when this structure is adopted, the substrate can be fixed on the lower waterproof sheet in a more stable state, and the upper waterproof sheet can be pulled in a more stable state.

In the present invention, the handle is
It is more preferable to employ a configuration in which the rotary shaft of the pinion is detachably provided.

That is, in the case of adopting this structure, by removing the handle when the pulling device itself is transported or stored, the handle is not obstructed and can be efficiently stored in space.

[0034]

1 is a perspective view showing a waterproof sheet tensioning device (P) according to an embodiment of the present invention, and FIG. 2 is a plan view showing the tensioning device (P). As shown in both figures,
The pulling device (P) includes a rectangular substrate (10) that is long in the front-rear direction, and a slide clamper (20), a pulling operation means (30), and the like are provided on the substrate (10).

The substrate (10) has a wide guide groove (11) continuously extending in the front-rear direction at the rear middle of the surface thereof.
Are formed.

As shown in FIGS. 2 and 6, this substrate (1
On the rear side of the back side of (0), a plate (12) with a biting piece which is long in the left-right width direction is attached in front and rear two-row arrangement. The sawtooth-shaped biting piece (12
Regions in which a) are formed and regions in which they are not formed are alternately provided along the width direction. Plate with bite piece (1
2) is attached so that the rear end side is inclined downward, and each biting piece (12a) is arranged so as to project rearward and downward.

As shown in FIGS. 1 to 5, the slide clamper (20) has a lower clamp plate (20a) and an upper clamp plate (20b).

The lower clamp plate (20a) has a flat plate shape conforming to the guide groove (11) of the substrate (10), and has a rectangular flat plate or strip extending continuously in the width direction on the upper surface. Plate-shaped lower convex step (22a) (22a)
Are formed at predetermined intervals in the front-rear direction. The lower convex step portion (22a) is formed, for example, by brazing and fixing a rectangular metal plate to the clamp plate (20a).

Further, a pair of shaft fixing pieces (23a) (23a) are provided in a rising shape on both sides of the front end of the lower clamp plate (20a).
a) (23a) so that the clamp shaft (2
4) is fixed.

The upper clamp plate (20b) has a flat plate shape, and the lower clamp plate (20a) has a lower surface.
A rectangular flat plate or strip-shaped upper convex step (22) corresponding to the convex step (22a) (22a) of (20a).
b) is formed so as to extend continuously in the width direction. The convex step portion (22b) is formed by brazing and fixing a rectangular metal plate to the clamp plate (20b) as in the above.

Further, a pair of mounting pieces (23b) (23b) are provided in a rising shape on both sides of the front end of the upper clamp plate (20b) and each mounting piece (23b) (23).
Shaft insertion holes (24b) (24b) are formed in b). Then, the clamp shaft (24) is loosely fitted in the shaft insertion holes (24b) (24b), so that the upper clamp plate (20b) causes the clamp shaft (24) to serve as a fulcrum. 20a) can be opened and closed freely.

The shaft insertion holes (24b) and (24b) of the upper clamp plate (20b) have a hole diameter slightly larger than that of the clamp shaft (23).
In the range of the vertically elongated hole, b) is attached so as to have a play at least in the vertical direction. This causes the upper clamp plate (20b) to be described in detail later.
Through the waterproof sheet (2) to the lower clamp plate (20
When it is closed by pressing it against b), the clamp shaft side of the upper clamp plate (20b) is slightly displaced upward,
The lower clamp plate (20a) is arranged substantially parallel to the lower clamp plate (20a).

The lower clamp plate (20a) of the slide clamper (20) is connected to the guide groove (1) of the substrate (10).
1) It is slidably inserted and arranged in the inside. In that state, the pair of pressing plates (25) and (25) are closed by closing both side edges of the lower clamp plate (20a) from above.
The board (10) is screwed and fixed to both sides of the guide groove (11). As a result, the slide clamper (2
0) is attached to the substrate (10) so as to be slidable in the front-rear direction along the guide groove (11) while being prevented from coming off.

Between the shaft fixing pieces (23a) and (23a) of the lower clamp plate (20a) and the mounting pieces (23b) and (23b) of the upper clamp plate (20b), a spring-up urging means is provided. The tension springs (26) (26) are bridged. By the biasing force of the tension springs (26) (26),
The upper clamp plate (20b) is biased upward, and in the natural state, the upper clamp plate (20b) is configured to be held in an open state upward.

On the other hand, the pulling operation means (30) comprises a rack (31), a pinion (32), a handle (33) and the like as basic constituent elements.

That is, the rack (31) is arranged on the front part of the upper surface of the substrate (10) so that its teeth (31a) face upward and along the front-rear direction. It is rotatably attached to the front end of the side clamp plate (20a).

Further, a pair of left and right pinion shaft mounting pieces (34) (34) are provided in a standing manner at both sides of the rack (31) at the front end of the upper surface of the board (10). Both ends of the pinion shaft (35) are rotatably supported by (34) and (34) so as to be bridged therebetween.

A pinion (32) is fixed to the pinion shaft (35) with its outer peripheral teeth (32a) meshing with the teeth (31a) of the rack (31). As a result, when the pinion shaft (35) rotates in the clockwise direction (positive direction) in FIG. 3 together with the pinion (32), the rack (3
1) Move forward and slide clamper (20)
Is configured to slide forward.

As shown in FIG. 4, the pinion shaft (35) is provided with a ratchet mechanism as a sliding direction restricting means. The ratchet wheel (36) in this ratchet mechanism is fixed to the pinion shaft (35). Further, the pinion shaft mounting piece (34) on one side corresponds to the ratchet wheel (36) and is provided with a lever (3
The base end of 7) is rotatably mounted, and the reverse rotation preventing claw (37a) at the lever tip is moved by the swinging motion of the lever (37) so that the outer peripheral teeth (3) of the ratchet wheel (36).
6a) is detachable. And
Ratchet wheel (36) or pinion (32)
Is rotated in the forward direction (clockwise in FIGS. 3 and 4), the reverse rotation preventing claw (37a) is disengaged from the ratchet teeth (36a), and the forward rotation is permitted, Ratchet wheel (36) or pinion (3
2) rotates in the opposite direction (counterclockwise in FIGS. 3 and 4), the ratchet teeth (36) of the reverse rotation prevention claw (37a) are rotated.
The engagement with a) is maintained and rotation in the opposite direction is prevented.

The claw lever (37) is provided with a claw disengagement operation member (38) extending so as to project in the lever length direction, and the operator grips the operation member (38). By raising and releasing the reverse rotation preventing claw (37a) from the ratchet teeth (36a), the rotation restriction of the pinion (32) in the reverse direction can be released.

Further, as shown in FIGS. 1 to 4, one end of the pinion shaft (35) is pulled out to the side of one shaft mounting piece (34), and the handle (33) is attached to the pulling out end.
One end of is attached detachably. This handle (3
A ratchet mechanism is incorporated in the shaft fitting portion of 3), and when the handle (33) is pivotally rotated in the front-rear direction about the pinion shaft (35) as a fulcrum, only the operation force at the time of backward rotation is generated by the pinion. The pinion (32) is transmitted to the shaft (35).
Rotates in the forward direction, while spinning in the forward direction, it spins,
The operation force is configured not to be transmitted to the pinion shaft (35).

As shown in FIGS. 1 and 2, the substrate (10)
On the other side of the front end of the upper surface, a spring receiving piece (51) is provided in a rising shape. Furthermore, this spring receiving piece (5
In 1), a spring guide shaft (52) arranged along the front-rear direction is slidably arranged so as to penetrate,
The rear end of the spring guide shaft (52) is fixed to the front end of the lower clamp plate (20a) of the slide clamper (20).

A compression spring (50) is fitted on the spring guide shaft (52), and the compression spring (50) is fitted.
Both end surfaces of the spring are arranged so as to be engaged with the spring receiving piece (51) and the slide clamper (20). And
When the slide clamper (20) slides forward, the compression spring (50) is compressed and stored, and in that state, the reverse rotation preventing pawl (37a) is moved to the ratchet teeth (36).
When the pinion (32) is disengaged from the rotation restriction in the reverse direction after being released from a), the slide clamper (20) slides backward by the urging force of the compression spring (50), Is configured to return to its initial position.

In this embodiment, the compression spring (50) constitutes the rear biasing means.

The tip of one side of the U-shaped handle (60) is fixed to the front end surface of the substrate (10) by brazing,
The tip of the other side piece is brazed and fixed to the side end surface of the substrate (10), whereby the handle (60) is obliquely arranged above the front side portion of the substrate (10).

The tension device (P) of the present embodiment has the above-mentioned structure, and the upper waterproof sheet (2) laid on the structure (1) such as a flat roof or a pool is installed in the width direction (forward). It is used when the side edge of the lower waterproof sheet (3) is overlapped with the side edge of the lower waterproof sheet (3) to be joined.

That is, the pulling device (P) is placed on the side edge of the lower waterproof sheet (3) with the pair of clamp plates (20a) and (20b) slid backward.

Then, as shown in FIG. 7 (a), the side edges of the upper waterproof sheet (3) are attached to the pair of clamp plates (20a).
It is placed between (20b) and the upper clamp plate (20b) is stepped on with one foot. As a result, FIG. 7 (b) and FIG.
As shown in (a), the side edge portion of the upper waterproof sheet (3) is sandwiched by a pair of clamp plates (20a) (20b), and the board (10) has its bite piece (12a) on the lower side. It is pressed and fixed in a state where it bites into the waterproof sheet (3).

Next, the steering wheel (33) is rotated while keeping the stepped state. This makes pinion (32)
Rotates in the positive direction, and the rack (31) and the pair of clamp plates (20a) (20b) slide forward. Thus, as shown in FIG. 8B, a pair of clamp plates (20
a) The upper waterproof sheet (2) sandwiched between (20b) is pulled toward the lower waterproof sheet (3) to give a predetermined tension.

In the tensioned state of the seat, the reverse rotation preventing pawl (3) is attached to the outer peripheral tooth (36a) of the ratchet wheel (36).
By engaging 7a), rotation in the opposite direction is blocked and the waterproof sheet (2) is maintained in a pulled state.

Then, in this tension state, the side edge of the upper waterproof sheet (2) is superposed on the side edge of the lower waterproof sheet (3), and an appropriate position is fused by heat or welded by a solvent. , Adhesive, etc. (hereinafter referred to as "heat fusion, etc.")
Temporarily adhere by.

Here, the tension device (P) of this embodiment is
Between the upper and lower clamp plates (20a) (20b), since the convex step portions (22a) (22b) are formed by shifting the positions in the front-rear direction, the side edge portion of the upper waterproof sheet (2) is The convex step portions (22a) and (22b) are sandwiched in a wavy or zigzag bent shape. Therefore, it is possible to secure a sufficient holding force in the pulling direction of the upper waterproof sheet (2) and prevent the waterproof sheet (2) from slipping on both clamp plates (20a) (20b). Therefore, it is possible to prevent scratches from occurring on the waterproof sheet (2), and it is possible to reliably prevent defects such as slipping out of the waterproof sheet (2).

Moreover, since the upper clamp plate (20b) is attached to the clamp shaft (24) so as to have a play in the vertical direction, the upper clamp plate (20b).
Through the waterproof sheet (2) to the lower clamp plate (20
When it is closed to b), the rotation shaft side of the upper clamp plate (20b) is slightly displaced upward as shown by the solid line from the imaginary line in FIG.
It is arranged substantially parallel to a). For this reason, the waterproof sheet (2) can be sandwiched between the clamp plates (20a) and (20b) with good balance evenly over the entire clamp surface.
Both clamp plates (20a) (20b) of the waterproof sheet (2)
It is possible to more surely prevent the slip on the.

Since the pulling device (P) is stepped on, the substrate (10) is moved by the operator's own load.
The bite piece (12a) can be firmly pressed against the lower waterproof sheet (3) while being surely bited. Therefore, the pulling operation of the waterproof sheet (2) does not cause the substrate (10) to be lifted from the lower waterproof sheet (3) due to its recoil, and the sheet pulling operation can be smoothly performed.

Further, by simply stepping on the upper clamp plate (20b) with one foot, the clamping operation of the upper waterproof sheet (2) by the clamp plates (20a) (20b) and the lower waterproof sheet (3) of the substrate (10). Since the pressing and fixing operation for the sheet can be performed at the same time, even one operator can surely perform these operations, and the sheet construction work can be efficiently performed without manpower.

On the other hand, after the temporary adhesion at the predetermined position is completed as described above, the operator releases the stepping on the tension device (P). Thereby, the upper clamp plate (20b) is lifted by the urging force of the tension springs (26) (26), the clamp plates (20a) (20b) are automatically opened, and the upper clamp sheet (2) is clamped. Is released. At the same time, the load of the worker is removed from the tension device (P), so that the pressing and fixing to the lower waterproof sheet (3) of the substrate (10) is released.

Subsequently, the tensioning device (P) is transferred to the next temporary adhesion position, and the temporary adhesion is performed in the same manner as described above.
Before that, the ratchet mechanism lever (3
7) is picked up via the claw release operation member (38),
The reverse rotation preventing claw (37a) is disengaged from the ratchet teeth (36a). As a result, the rotation restriction of the pinion (32) in the reverse direction is released, and the pair of clamp plates (20a) (20b) are slid rearward by the biasing force of the compression spring (50) to return to the initial position. .

In this way, the clamp plates (20a) (20b) can be easily and reliably returned to the initial state by a one-touch operation of only picking up the lever (37) with the claw.

After that, the tensioning device (P) is set at the next temporary adhesion position, and the temporary adhesion is performed in the same manner as above.

After the temporary adhesion at all positions is completed in this manner, the side edges of the waterproof sheets (2) and (3) are continuously bonded over the entire area and then permanently bonded by heat fusion or the like to form the waterproof sheet (2). ) The construction of (3) is completed.

It should be noted that a bite mark by the bite piece (12a) of the tensioning device (P) is formed on the side edge portion of the lower waterproof sheet (3). As a result, the periphery of the bite mark is covered with the upper waterproof sheet (2) and the trace of the bite does not become a starting point of water leakage, etc., and the predetermined waterproofness is surely obtained. You can

As described above, according to the tensioning device (P) of the present embodiment, the side edges of the waterproof sheet (2) are corrugated or zigzag by the clamp plates (20a) (20b) with the convex steps. Since it is sandwiched in a bent shape, a sufficient holding force in the pulling direction of the waterproof sheet (2) can be secured, and both clamp plates (2) of the waterproof sheet (2) can be secured.
0a) and (20b) can be prevented from slipping, scratches can be prevented from occurring and slipping out can be prevented, and the clamp can be reliably performed.

Moreover, in the present embodiment, both clamp plates (20a) (20b) are arranged so as to be parallel to each other when the waterproof sheet (2) is sandwiched, so both clamp plates (20a). The waterproof sheet (2) can be sandwiched evenly and in good balance over the entire clamp surface of (20b), and both clamp plates (20a) (2) of the waterproof sheet (2) can be sandwiched.
It is possible to more reliably prevent slipping with respect to 0b).

Since the substrate (10) is pressed against the waterproof sheet (3) by the operator's own load by stepping on the tensioning device (P), it is possible to prevent the substrate (10) from being lifted during the pulling operation. The pulling operation can be performed easily and smoothly.

Particularly in this embodiment, the substrate (10)
The biting piece (12a) is formed on the back surface of the
Since the position stability is improved by letting 2a) bite into the waterproof sheet (3), the board (10) can be more reliably prevented from rising, and the sheet pulling operation can be performed more easily and smoothly. be able to.

In the present embodiment, the substrate (10)
Since the handle (60) is attached to the front part of the substrate (1), when the sheet pulling operation is performed, the handle (60) is held by hand and the pulling device (P) is pressed downward to hold the substrate (1).
It is possible to more surely prevent the floating of (0) and to pull the waterproof sheet (2) in a more stable state. Further, by using the handle (60), it is possible to easily carry the pulling device (P) and carry out the transfer work.

Further, in the present embodiment, the operation of holding the upper waterproof sheet (2) and the operation of pressing and fixing the substrate (10) can be simultaneously performed by simply stepping on the upper clamp plate (20b) with one foot. Therefore, these operations can be surely performed even by one worker, and the seat construction work can be efficiently performed without manpower.

The clamp plates (20a) (20b) are automatically released by the urging force of the tension springs (26) (26) simply by releasing the stepping on the tension device (P). The plate (20a) (20b) can be easily opened, and the pinion (3) can be set by simply picking up the pawl lever (37) of the ratchet mechanism.
The rotation restriction in the reverse direction of 2) is released, and the compression spring (5
The pair of clamp plates (20a) (2
0b) can be slid back to the initial position. In this way, the return operation to the initial state can be easily performed, and the next sheet pulling operation can be smoothly performed, so that the work efficiency can be improved. In particular, when the waterproof sheets (2) and (3) are applied to a wide range, the tension device (P) can be efficiently and repeatedly used, and the working time and the cost can be reduced. it can.

In this embodiment, the handle (3
Since the pulling device (P) is detachably attached to the pulling device (P), the handle (3
By removing 3), the handle (33) does not get in the way and can be stored efficiently in space.

In the above embodiment, the lower and upper convex steps (22a) (22b) are formed so as to be continuous in the width direction, but the present invention is not limited to this, and is intermittent in the width direction. It may be formed. The point is that the lower and upper convex step portions (22a) and (22b) may be arranged so as to be displaced in the front-rear direction.

In the present invention, the lower convex step (22
The numbers of the a) and the upper convex steps (22b) are not limited to those in the above embodiment, and it is sufficient that at least one is formed in each.

[0082]

As described above, according to the waterproof sheet tensioning apparatus of the present invention, the edge portion of the waterproof sheet is sandwiched by the convex step portions of the pair of upper and lower clamp plates in a wavy or zigzag bent shape. Therefore, it is possible to secure a sufficient holding force in the pulling direction of the waterproof sheet, prevent the waterproof sheet from slipping on both clamp plates, and reliably clamp while preventing the occurrence of scratches and slipping out. . Also, the upper clamp plate is stepped on, and the substrate is strongly pressed against the waterproof sheet by the operator's own load.Therefore, when the waterproof sheet is pulled, the reaction may cause the substrate to float up from the lower waterproof sheet. The seat pulling operation can be performed easily and smoothly. Further, by simply stepping on the upper clamp plate, it is possible to simultaneously perform the sandwiching operation of the waterproof sheet by the clamp plate and the pressing and fixing operation of the board against the waterproof sheet, so that even a single operator can perform these operations. It can be performed reliably, and the seat construction work can be performed efficiently without manpower. In addition, it is possible to easily restore the initial state by simply sliding the slide clamper back to its original position by releasing the restriction by the slide direction restricting means and using the slide restriction releasing means. There is an effect that it can be improved.

In the present invention, when the rear urging means for urging the slide clamper backward is provided, when the slide regulation by the slide direction regulating means is released, the slide clamper urges the rear urging means. Since it automatically slides to the original position, there is an advantage that the operation of returning to the initial state can be performed more easily.

In the present invention, when the lower and upper convex steps are formed continuously in the left-right width direction, or when a plurality of lower and upper convex steps are alternately arranged, the waterproof sheet. The holding force in the pulling direction of can be further improved, and the sliding of the waterproof sheet against both clamp plates is
There is an advantage that it can be prevented more reliably.

Further, in the present invention, when the ratchet mechanism is adopted as the slide direction regulating means, there is an advantage that the slide regulation of the slide clamper can be performed more reliably.

Further, in the present invention, when the flip-up urging means for opening the upper clamp plate upward is provided, the urging force of the urging means is used only by releasing the depression of the upper clamp plate. Since the plate is automatically opened, there is an advantage that the opening operation of the clamp plate, and thus the operation of returning to the initial state, can be performed more easily.

In the present invention, the upper clamp plate is
When pivotally connecting to the lower clamp plate in a state having play in the vertical direction, when the waterproof sheet is sandwiched by the upper and lower clamp plates, the pivotal part of the upper clamp plate is displaced upward, Since the upper and lower clamps are arranged substantially parallel to each other, it is possible to evenly balance the waterproof sheet across the entire clamp surface of both clamp plates and prevent the waterproof sheet from slipping on both clamp plates more reliably. There is an advantage that you can.

Further, in the present invention, when the handle is provided on the front upper surface of the substrate, the substrate is lifted more by holding the substrate by the hand and holding the substrate downward during the sheet pulling operation. The advantage is that it is possible to prevent it more reliably and to pull the waterproof sheet in a more stable state. Furthermore, by using a handle, the pulling device itself can be easily carried and transferred. There is.

Further, in the present invention, when the biting piece is formed on the back surface of the substrate, the substrate can be fixed on the lower waterproof sheet in a more stable state, and the sheet pulling operation can be performed more smoothly. There is an advantage that can be done.

Further, in the present invention, when the handle is configured to be removable, by removing the handle during transportation, storage, etc. of the tensioning device itself, the handle does not get in the way and space efficiency is improved. It has the advantage that it can be stored well.

[Brief description of drawings]

FIG. 1 is a perspective view showing a waterproof sheet tensioning device according to an embodiment of the present invention.

FIG. 2 is a plan view showing the tension device of the embodiment.

3 is a cross-sectional view taken along line XX of FIG.

FIG. 4 is a sectional view taken along line YY of FIG.

5 is a cross-sectional view taken along line ZZ of FIG.

FIG. 6 is a rear view of the rear portion of the substrate in the tension device of the embodiment.

7A and 7B are side cross-sectional views showing, in an enlarged manner, the vicinity of the sheet holding portion of the clamp plate in the tension device of the embodiment, FIG. 7A is a side sectional view in an open state, and FIG. It is a side sectional view in a state of being pinched.

8A and 8B are plan views showing a state in which the tension device of the embodiment is used, wherein FIG. 8A is a plan view before pulling the waterproof sheet, and FIG. 8B is a plan view after pulling the waterproof sheet. Is.

[Explanation of symbols]

2 ... Upper waterproof sheet 3 ... Lower tarpaulin 10 ... Substrate 12a ... bite piece 20 ... Slide clamper 20a ... Lower clamp plate 20b ... Upper clamp plate 22a ... Lower convex step 22b ... Upper convex step 25 ... Tension spring (jumping up urging means) 30 ... Pulling operation means 31 ... rack 32 ... Pinion 33 ... Handle 36 ... Ratchet wheel 36a ... Ratchet tooth (peripheral tooth) 37a ... Reverse rotation prevention claw 38 ... Claw release operation member 50 ... Compression spring (rear biasing means) 60 ... Handle P ... Waterproof sheet tensioning device

Claims (10)

[Claims] 1. A waterproof sheet tensioning device for pulling an upper waterproof sheet toward a lower waterproof sheet when the edge of the upper waterproof sheet is overlapped with the edge of the lower waterproof sheet. A substrate having a seat pulling direction in the front-back direction, a slide clamper slidably provided in the front-back direction on the substrate, a pulling operation means for sliding the slide clamper forward, and a front side of the slide clamper. Sliding direction regulating means for permitting the sliding movement to the rear and regulating the backward sliding movement, and a slide regulation releasing means for canceling the backward slide regulation by the slide direction regulating means of the slide clamper. The slide clamper includes a lower clamp plate and a lower clamp plate in which a front edge is pivotally connected to the lower clamp plate. And an upper clamp plate that can be opened and closed with respect to the clamp plate, a lower convex step portion is provided on the clamp surface of the lower clamp plate, and a clamp surface of the upper clamp plate,
An upper convex step portion is provided which is displaced in the front-rear direction with respect to the lower convex step portion, and the pulling operation means is provided with a pinion rotatably provided at a front portion of the board and the pinion meshing with the pinion. A rack whose rear end is fixed to the slide clamper in a closed state and a handle for rotating the pinion, and the substrate is arranged on an edge of the lower waterproof sheet, and the lower side is disposed. When the edge of the upper waterproof sheet is placed on the clamp plate, by stepping on the upper clamp plate, the edge of the upper waterproof sheet is sandwiched between the upper and lower clamp plates, and the substrate is the lower waterproof sheet. While being pressed and fixed to the edge portion of the, in the pressed and fixed state, by rotating the pinion in the forward direction based on the operation of the handle, through the rack, Tarpaulin tensioning device whose serial sliding clamper is characterized by comprising configured to slide forward. 2. A rear urging means for urging the slide clamper rearward, further comprising: a slide direction regulating means sliding through the slide regulation releasing means in a state where the slide clamper slides forward. The waterproof sheet pulling device according to claim 1, wherein the slide clamper is configured to slide rearward by the biasing force of the rear biasing means when the regulation is released. 3. The waterproof sheet tensioning device according to claim 1, wherein the lower and upper convex steps have a rectangular flat plate shape continuously extending in the left-right width direction. 4. One of the lower and upper convex step portions is provided with a plurality of convex step portions at intervals in the front-rear direction, and the other convex step portion is adjacent to the one convex step portion. The waterproof sheet tensioning device according to any one of claims 1 to 3, which is arranged corresponding to the space. 5. The sliding direction restricting means disengages a ratchet wheel fixed to a rotation shaft of the pinion and an outer peripheral tooth of the ratchet wheel from a disengagement state during forward rotation and a reversal direction engagement. 5. A ratchet mechanism having a reverse rotation preventing pawl, wherein the slide regulation releasing means is composed of a pawl removal operating member for operating to separate the reverse rotation preventing pawl from the outer peripheral teeth of the ratchet wheel. The waterproof sheet tensioning device according to any one of 1. 6. The waterproof sheet tensioning device according to claim 1, further comprising flip-up urging means for urging the upper clamp plate in a direction in which the upper clamp plate is opened upward. 7. The upper clamp plate is pivotally connected to the lower clamp plate so as to have a play in the vertical direction, the upper clamp plate is closed, and the waterproof sheet is sandwiched between the upper and lower clamp plates. 7. The waterproof sheet tensioning device according to any one of claims 1 to 6, wherein the upper and lower clamps are arranged substantially parallel to each other when the pivotal portion of the upper clamp plate is displaced upward. 8. The waterproof sheet tensioning device according to claim 1, wherein a handle is provided on a front upper surface of the substrate. 9. The waterproof sheet tensioning device according to claim 1, wherein the back surface of the substrate is provided with a digging piece that digs into the surface of the waterproof sheet. 10. The waterproof sheet tensioning device according to claim 1, wherein the handle is detachably provided on the rotating shaft of the pinion.