JPH0127643Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a strong sheet fastener that can easily fix a vinyl sheet to a pipe frame of a gate-shaped frame in a greenhouse or other greenhouse.

As shown in Fig. 1, a conventional sheet fastener has a holding opening c that is endlessly cut in the longitudinal direction in order to press and hold the vinyl sheet b against the pipe frame a.
There are some that consist of a plastic cylindrical body d with a snap-spring-like cross section, and others that have springs e, e... embedded in the plastic to strengthen the pressing force. Ta. However, such seat fasteners are expensive because they use a large amount of plastic and the process of embedding the spring e is complicated. Furthermore, in the past, in order to improve the above-mentioned seat fasteners, the middle part of the cylindrical body d was formed into a truncated o-leg shape in cross section, as shown in Fig. 2, in order to reduce the amount of plastic used. and the same part as the seat pressing leg f,
f, and the sheet holding parts g and g of the holding base h whose both ends are sheet holding parts g and g are semicircular in order to hold and press the sheet holding parts g as a substitute for the embedded spring e. There has also been a device in which push levers i, made of elastic steel wire bent into an arc shape or a snap spring shape are attached so as to be swingable in the lateral direction. However, in this seat fastener, since the operating direction of the pressing lever i is the horizontal direction, the holding base h
was easily displaced from the pipe frame a, and moreover, the sheet pressing leg f was likely to twist, causing cracks to occur at that portion and being easily damaged.

This invention has been improved in order to cope with such conventional circumstances, and its details will be explained below with reference to the accompanying drawings based on a typical embodiment of this invention.

As can be understood from the overall perspective view in Fig. 3, the sheet fastener of this invention is designed to press and hold the vinyl sheet b against the pipe frame a of the gate-shaped frame in a greenhouse or other greenhouse. Both ends of a cylindrical body having a holding opening 1 with an endless cut in the direction and having a snap-spring cross section are used as sheet holding parts 2, 2, and the middle part is a sheet pressing leg having a truncated o-leg shape in cross section. The sheet pressing legs 3, 3 of the holding base 4 having the parts 3, 3 have a holding opening 5 in the shape of a snap spring in order to hold and press the circumferential side of the sheet holding parts 2, 2. Clamping levers 7, 7 made of elastic steel wire and having a bent clamping part 6 are attached to the holding base 4 so as to be swingable in the longitudinal direction.

The holding base 4 is made of elastic plastic that allows the holding opening 1 to expand and contract so that it can be held onto the pipe frame a with a pressing force or removed. The fitting part 2 has a mouth width smaller than the outer diameter of the pipe frame a when it is free.

The clamping pressure lever 7 is made of a spring steel wire, a piano wire, or the like having elasticity that allows the clamping opening 5 to expand and contract so that it can be clamped to or removed from the sheet holding part 2 with clamping pressure. Furthermore, the clamping pressure part 6 has an inner diameter slightly smaller than the outer diameter of the sheet holding part 2 and a circumference of at least a semicircle when it is free, and the clamping part 6 has a circumference of at least a semicircle. The width of the opening is smaller than the outer diameter of the seat holding portion 2.

Note that the reference numeral 8 in the figure indicates the support portion 9 of the clamping pressure lever 7.
is a fitting groove for securely clamping the clamping pressure lever 7;
Reference numeral 10 denotes a notch for making it easier to put a finger on the clamping pressure lever 7 when the lever 7 is removed.

When using the sheet fastener of this invention, first, with the vinyl sheet b applied to the pipe frame a, press the holding opening 1 of the holding base 4 against the pipe frame a from the vinyl sheet b side. , the holding opening 1 expands along the circumferential surface of the pipe frame a, and then contracts and closes to cover the vinyl sheet b.
Press and hold onto pipe frame a. next,
When the clamping pressure part 6 of the clamping pressure lever 7 is pressed against the sheet holding part 2, the clamping opening 5 expands along the circumferential surface of the sheet holding part 2, and then contracts and closes to fit into the fitting groove. 9, and press the sheet holding part 2. As a result, the vinyl sheet b is strongly pressed and fixed by the pipe frame a. In addition, when removing the seat fastener from the pipe frame a, first unhook the clamping pressure part 6 of the clamping pressure lever 7 from the seat clamping part 2, and then remove the clamping pressure part 6 from the clamping base 4. All you have to do is pull it out from the pipe frame a.

In the seat fastener of this invention, which is constructed as described above, a pair of clamping pressure levers are swingably supported by a support portion at an intermediate position of the seat pressing legs of the holding base.
Moreover, since they are arranged symmetrically, first of all, the snap operation of the clamping pressure lever when fixing the vinyl sheet to the pipe frame is difficult.
The movement is not around the outer peripheral surface of the pipe frame as in the conventional example shown in Fig. 2, but rather in the longitudinal direction (i.e., axial direction) of the pipe frame, and in addition, the pair of clamping pressure levers are moved in symmetrically opposite directions. It is configured so that it must be rotated. Therefore, unlike the prior art, when the clamping pressure lever is operated with a snap, the holding base rotates around the outer periphery of the pipe frame, damaging the vinyl sheet, or twisting both ends of the holding base. Not only is there no risk of causing an accident that could result in damage to the seat gripping part, for example, as proposed in Utility Model Application Publication No. 54-82746, it is possible to avoid damage to the pipe frame during the snapping operation. If force is applied only in one direction along the axis, the holding base will shift in that direction, and there is no risk of scratching the vinyl sheet due to sliding.
Moreover, the snapping operation, which is performed without any rotation or sliding of the holding substrate, is performed between the pair of clamping pressure levers in the state shown in FIG. By pressing the palm of one hand from above), the pair of clamping pressure levers can be elastically clamped at once.
It becomes extremely efficient. This feature can be said to be an outstanding feature in light of the fact that all conventionally known devices required the use of both hands to work, and even when working with both hands, misalignment occurred. .

Secondly, since the clamping pressure lever is supported by the support part at the intermediate position of the seat pressing leg, when this seat fastener is removed from the pipe frame, the seat clamping part of the clamping base must be clamped until then. If you remove both the clamping pressure parts of the clamping pressure levers and return them to the state shown in Figure 3, hook both clamping pressure parts with your thumb and forefinger and pull them in the direction perpendicular to the pipe frame. The force is applied to the center of the adhering substrate,
The holding base detaches from the pipe frame in a well-balanced manner, and does not deform the holding base and make it unusable or damage the vinyl sheet.
It is understood that this point is one of the important features of this invention, since no technical idea to solve these problems can be found in the invention or other conventionally known technologies. .

As mentioned above, the seat fastener of this invention has excellent features incomparable to conventional technology in terms of ease of installation and removal, and is easy to manufacture due to its simple structure. Not only can it be provided at a low cost, but the effect of fixing the seat is also safe and firm because the clamping pressure of the clamping pressure lever is propagated in a well-balanced manner throughout the fastener.

[Brief explanation of the drawing]

Figures 1 and 2 are overall perspective views showing conventional seat fasteners, Figure 3 is an overall perspective view showing a typical embodiment of this invention, and Figure 4 is an enlarged side view showing the attached state. It is. DESCRIPTION OF SYMBOLS 1... Holding opening, 2... Sheet holding part, 3... Sheet pressing leg part, 4... Holding base, 5... Clamping opening,
6... Clamping pressure part, 7... Clamping pressure lever, a... Pipe frame, b... Vinyl sheet.

Claims (1)

[Scope of utility model registration request] Both ends of the cylindrical body, which had an endlessly cut-shaped holding opening in the longitudinal direction and was formed in the shape of a snap spring in cross section, were sheet holding parts, and the middle part thereof was used as a sheet pressing leg with a truncated o-leg shape in cross section. The holding base is swingably supported by a supporting part formed approximately in the middle of the sheet pressing leg of the holding base, and each clamping part is attached to one sheet holding part of the holding base. so that it can be elastically clamped to
A fastener for a vinyl greenhouse such as a greenhouse, comprising a pair of clamping pressure levers made of elastic steel wire arranged symmetrically in the longitudinal direction of a holding base.