JPH0422925Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to sheet tensioning pliers used for tensioning a sheet-like object.

[Background technology]

A billiard table has a slate board attached to a frame provided with legs, and the slate board is covered with a bed cloth such as a rashia sheet.
This bed cloth is stretched when assembling the billiard table and when repairing the cloth.

Conventionally, when stretching this bed cloth, it was pulled by hand and then fixed to the frame using a tassel. However, due to the large size of this bed cloth, it was difficult to stretch it evenly without loosening.

On the other hand, using pliers or the like to tighten the cloth would damage the bedcloth and make the work difficult as the user would have to hold the pliers while pulling.

An object of the present invention is to provide sheet tensioning pliers suitable for stretching a sheet-like body onto a frame or the like.

[Disclosure of invention]

In order to achieve the above object, the sheet tensioning pliers according to the present invention includes a plier main body, an upper jaw integrally provided with the plier main body and having a wide holding part, and a top jaw rotatably attached to the plier main body. a lower jaw having a wide holding part that faces the holding part of the upper jaw; a holding lever that rotates and holds the lower jaw so that the holding part of the lower jaw is pressed against the holding part of the upper jaw; It consists of a fulcrum lever that is provided on the lever and serves as a fulcrum when holding the sheet and applying tension. Furthermore, the width of the pressing portions of the upper jaw and the lower jaw can be adjusted by varying the rotational position of the pressing lever.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings and the like.

1 and 2 are diagrams showing an embodiment of the sheet tensioning pliers according to the present invention, in which FIG. 1 shows the jaws in a closed state, and FIG. 2 shows the jaws in an open state. FIG. 3 is a diagram showing the use state of the pliers of the embodiment.

The main body 1 is a member made by bending a metal plate into two parts from the dorsal side so that the neck side is approximately parallel and the caudal side has a circular cross section.A spring hook 1a is provided near the center of the dorsal side. A female thread 1b is provided on the caudal side.

An upper jaw 2 is fastened and fixed to the neck side of the main body 1 with a rivet 3, and furthermore, in order to maintain the parallelism of the neck side of the main body 1, a ring member (not shown) is sandwiched in the middle side and is fastened with a rivet 4. .

Further, a lower jaw 5 is attached to the neck side of the main body 1 so as to be rotatable about a shaft 6 so as to mesh with the upper jaw 2.

At the interlocking part of these upper jaws 2 and lower jaws 5,
Metal holding plates 7 and 9 bent in the opening direction of the respective jaws 2 and 5 are welded to each other, and a rubber plate is attached to the inside of the holding plates 7 and 9 to prevent damage to the sheet-like object being sandwiched. Elastic sheets 8 and 10 are adhered to each other.

A spring hook 5a is provided on the throat side of the lower jaw 5, and a spring 11 is provided between it and the spring hook 1a of the main body 1.
is applied, biasing the lower jaw 5 in the direction of opening.
On the other hand, a lever 13 is attached to a shaft 12 at the tip of the lower jaw 5.
It is rotatably attached. Lever 1
3 is connected with a fulcrum lever 13a having a curved tip, which facilitates the work of pulling the sheet-like object.

A link 14 is attached to the lever 13 so as to be rotatable about a shaft 18, and the other end of the link 14 has an adjustment screw 16 screwed into the female thread of the main body 1.
is engaged with the tip of the In addition, the lever 13 has
A release lever 17 having an engaging portion 17a that engages with the link 14 is rotatably mounted around a shaft 18, and is biased clockwise in FIG. 1 by a spring 19.

Next, the work of tensioning a bed cloth using the sheet tensioning pliers according to the present invention will be explained.

First, with the lower jaw 5 open as shown in Figure 2,
Rotate the adjusting screw 16 to adjust the right end of the link 14 to the second position.
By moving it left and right in the figure, the gap between the upper jaw 2 and the lower jaw 5 can be adjusted depending on the thickness of the bed cloth 23, which is a sheet-like body.

When the bed cloth 23 is inserted between the presser plates 7 and 9 of the upper jaw 2 and the lower jaw 5, and the lever 13 is grasped by hand, the lever 13 rotates counterclockwise in FIG. 2 about the shaft 12. When the shaft 15 moves above the line connecting the shaft 12 and the right end of the link 14, the lever 13 is locked and the lower jaw 5 keeps holding the bed cloth 23.

In this state, as shown in FIG.
Rotate 0 clockwise in Figure 3.

Next, attach the tucker stopper 2 to the bed cloth 23.
4, cut and remove the remaining part of the bed cloth 23.

When removing the bed cloth 23 held between the pliers 20, squeeze the release lever 17 and the engaging portion 17 will be released.
a hits the link 14, the lever 13 rotates clockwise, and both jaws 2 and 5 are unlocked.

In this embodiment, an example is shown in which a bed cloth for a billiard table is stretched, but the present invention can be similarly applied to the case in which other sheet-like objects such as chair seats, canvases for oil paintings, etc. are stretched. In this case, the holding plate 7,
The size and shape of the fulcrum lever 9 and the fulcrum lever 13a can be changed depending on the object.

[Effect of idea]

As explained in detail above, according to the present invention,
Since the sheet-like object can be held in a sandwiched state, tensioning work can be done easily.

In addition, since a lever is provided that serves as a fulcrum, even large sheet-like objects can be stretched without loosening.

In addition, we installed pressure plates on the upper and lower jaws,
The sheet-like body was no longer damaged.

[Brief explanation of the drawing]

1 and 2 are diagrams showing an embodiment of the sheet tensioning pliers according to the present invention, in which FIG. 1 shows the jaws in a closed state, and FIG. 2 shows the jaws in an open state. FIG. 3 is a diagram showing the use state of the pliers of the embodiment. 1... Main body, 2... Upper jaw, 3, 4... Rivet, 5... Lower jaw, 6... Shaft, 7, 9... Holder plate, 8, 10... Elastic sheet, 11... Spring, 1
2...Shaft, 13...Lever, 14...Link, 1
5...Shaft, 16...Adjustment screw, 17...Release lever, 18...Shaft, 19...Spring, 20...Pliers, 21...Slate plate, 22...Frame, 2
3... Betsudo cross, 24... Statzker stopper.

Claims (1)

[Claims for Utility Model Registration] (1) A pliers main body, an upper jaw having a wide holding part that is integrally provided with the pliers main body, and a upper jaw that is rotatably attached to the pliers main body and has a wide holding part of the upper jaw. a lower jaw with wide opposing holding parts; a holding lever that rotates and holds the lower jaw so that the holding part of the lower jaw is pressed against the holding part of the upper jaw; and a holding lever provided on the holding lever that holds the sheet. Sheet tension pliers consist of a fulcrum lever that serves as a fulcrum when clamping and applying tension. (2) The sheet tensioning pliers according to claim 1, which is configured to adjust the width of the pressing portions of the upper jaw and the lower jaw by varying the rotational position of the pressing lever.