JPS62191557A - Apparatus for tensioning embrodering article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to an embroidery article that is tensioned in an embroidery frame of an embroidery machine, which has a plurality of elastic tightening means that can be attached to a profile rail that opens above the embroidery frame. This relates to a tensioning device.

A device of this kind is known from DE 32 17 962 A1. In this tensioning device, a band-shaped embroidery material is tensioned in a rectangular embroidery frame by an elastic tightening means that is elastically tensioned in advance by bending. One end of the elastic tightening means is inserted into the inclined groove. The inclined groove is formed by the base plate of the embroidery machine and a profile plate fixed to the base plate. The other curved end of the elastic tightening means is located behind the protrusion of the cover plate of the embroidery machine. Tensioning of the embroidery takes place primarily by elastic tensioning of the elastic tightening means.

By compressing the elastic tightening means when worn,
Therefore, the strength can be increased by shortening the arcuate portion. In order to prevent the embroidery from coming out, that is, to prevent the embroidery from loosening in a situation where the tensile stress in the area around the puncture position of the embroidery increases as the number of punctures increases, it is necessary to Considerable force is required from the operator when releasing the tension after the process. This is because, in order to install and remove the elastic clamping member from its clamping position, the elastic clamping member at the clamping position must be compressed to deform its contour, and only by doing this can the elastic The tightening member can be installed in the tightening position,
Alternatively, it can be taken out from the installed position.

1a An object of the present invention is to provide an embroidered material tensioning device that can be easily operated with a small amount of force, and to configure this type of tensioning device so that the tensioned embroidered material does not loosen due to slipping. .

In order to achieve the above-mentioned object 1, the present invention is characterized in that the elastic tightening means is formed as a tightening member that is expandable by an expansion means and has a tightening arm directed outward. It is something to do.

According to the present invention, the width of the pressing edge in contact with the embroidery of the outwardly directed tightening arm is made smaller than the opening of the profile rail in order to attach the tightening member to the profile rail. Can be held at a suitable width. Therefore, no particular force is required when the clamping member is attached to the profile rail or when it is removed from the profile rail. To make the embroidery taut,
By operating the expanding means, the embroidery stuff that was pushed in when the tightening member was attached to the opening of the profile rail is removed from the opposing inner wall of the profile rail by forcibly expanding the tightening member when the expanding means is operated. Just press against it. Significantly greater tensioning forces are therefore obtained than with conventional elastic tightening means. The embroidery is held in place during the entire embroidery period without slipping and is taut without slack.

fork box Next, embodiments of the present invention will be described using the accompanying drawings.

A rectangular embroidery frame designated by reference numeral 1 has a plurality of profile rails 2 that are open upward. The edge 83 of the profile rail 2 close to the embroidery area is bent upward by more than 90°, while the edge away from the embroidery area is bent upward by 90°.
° It has a web 4 which is bent upwards. The web 4 is connected to an inwardly projecting horizontal projection 5. The embroidery frame 1 can be connected to the working side of a coordinate control device of an embroidery machine by means of a removable connection device, which is known, for example, from German Patent No. 3,217,962.

In order to tension the long embroidered object W within the embroidery frame 1, a plurality of tightening members 6 made of spring plates are provided. In the figure, only one tightening member is shown. Each tightening member 6 has a central gripping web 7 provided between the tightening arms 8, 9 which are oriented outwardly and abut against the embroidery object W, and is integral with a horizontal gripping web 7 which is open to the bottom. is formed. The clamping arm 8 oriented in the direction of the edge 3 extends horizontally, while the horizontal clamping arm 9 oriented in the direction of the perpendicular web 4 has an edge region 10 bent upwards by more than 90'. ing.

Inside the gripping web 7, an elliptical expansion rod ]-1 is arranged. Expansion rod 1] - is located approximately in the center of expansion rod 1.
A manual lever 12 is fixed, which grips around the expansion rod 11 by means of a fork-shaped end adapted to the shape of the expansion rod 11. The manual lever 12 is used to rotate the expansion rod 1].

The manual lever 12 projects outward through the slit 13. Each clamping element 6 is shaped in such a way that the opposing sides of the gripping web 7 contact the expansion bar 11 in a state in which they are elastically pretensioned inwardly.

A deformed pressing member] 4 is fixed to the horizontal arm 8 of each tightening member 6 by rivets 1 to 15. The region 16 of the presser member 14 which is arched in two directions is
The edge 3 of the profile rail 7 is covered, and the embroidery object W is pressed against the base plate 17 of the embroidery machine right next to the edge 3.

The operations of each tightening member 6 when tensioning the embroidery object W in the embroidery frame 1 and when releasing the tension are as follows.

First, the embroidery object W is placed on the embroidery frame 1 with the tightening member 6 separated. Before installing the tightening member 6 in the embroidery frame 1, the expanding rod 11 is rotated so that the long axis of the elliptical cross section of the expanding rod 11 is in the vertical direction. When the expansion rod 1] is in this position, the side surface of the grip web 7 is the same as the expansion rod 1.
The tightening member 6 has the narrowest width because it is in contact with the expansion rod at the height of its short axis. This narrowest width is
It is expedient to be somewhat narrower than the internal width of the opening between the edge 3 of the profile rail 2 and the projection 5. In this way, the embroidered object W is first pushed into one of the profile rails 2 facing each other using the tightening member 6 without pushing it by hand, and then the profile is opened without any special force. It can be pushed into the rail 2. Next, by rotating the opening/expanding rod 1-1 to the position shown in the drawing, the grip web 7 is expanded together with the tightening arms 8 and 9, whereby the embroidered object W is forcibly bent with the web 4. It is pressed against the fold formed by the edge 3. The embroidery W is therefore tensioned on one side. The same method is used when inserting the embroidered object W between the opposing profile rails 2. Embroidery item W on profile rail 2
When the embroidered object W is pushed into the opening, the embroidered object W is tightened without loosening and is lightly pressed against the base plate 17 by the presser member 14. By rotating the spreading rod 11 by 90', the second side F of the embroidery object W is also tensioned between the edge 3 of the profile rail 2 and the web 4. If necessary, the third and fourth side surfaces of the embroidery object W are also tensioned in the same manner by the end surfaces of the embroidery frame 1. A plurality of tightening members are required depending on the size of the embroidered item. Tightening of the embroidery is done not only by the elastic force but also by the force acting on the tightening arms 8 and 9 in the opposite direction to the outside direction, so that the tensile stress between the tightening positions increases as the punctures are repeated. The removal of the embroidered item is prevented.

The work of releasing the tension on the embroidered object W at the end of the embroidery process can similarly be done without requiring any special force. It is sufficient to simply rotate the expansion rod 11 by 90 degrees using the manual lever 12, and the short axis of the ellipse of the expansion rod 11 is aligned with the grip web 7.
The clamping arms 8 and 9 extend vertically within the opening and are returned from their expanded position to the reference position they occupied before being fitted into the opening of the profile rail 2. The tightening element 6 can then be easily removed from the profile rail, thus making it possible to remove the embroidery W.

[Brief explanation of drawings]

Figure 1 is a diagram showing the corner area of the embroidery frame, also showing the tightening position of the tightening member attached to the profile rail of the embroidery frame, and Figure 2 is a cross section taken along the line ■-■ in Figure 1. It is a diagram. 1... Embroidery frame 2... Profile rail 6... Tightening member 7... Grip web 8.9... Tightening arm 11... Expansion frame 12... ...Manual lever 14...Press member W...Embroidery item

Claims (5)

[Claims] (1) A tensioning device for an embroidery object to be tensioned in an embroidery frame of an embroidery machine, which has a plurality of elastic tightening means that can be attached to a profile rail that opens above the embroidery frame,
Tensioning device, characterized in that the elastic tightening means are designed as a tightening member (6) with outwardly directed tightening arms (8, 9) which can be expanded by means of an expansion means (11). (2) The tightening arms (8, 9) are connected to the grip web (7)
2. Tensioning device according to claim 1, characterized in that the tensioning device (11) is connected to one another by means (1) of the gripping webs (7), and that a spreading bar (11) is arranged inside the gripping web (7). (3) The tensioning device according to claim 1 or 2, characterized in that the expansion rod (11) is rotatably arranged and has an elliptical cross section. . (4) The tensioning device according to any one of claims 1 to 3, characterized in that a manual lever (12) is fixed to the expansion rod (11). (5) The presser member (1) is attached to the embroidery area side of the tightening member (6).
4) is fixed, and the holding member (14) covers the inner edge of the profile rail (2). tension device.