JP3408698B2 - Fastening and fixing device for target members in loom - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for fastening and fixing an object member in a loom, and more particularly, to a T-shaped support base for a lead holder or the like of a loom. The present invention relates to an improvement in technology for fastening and fixing a target member such as a sub-nozzle via a T-shaped piece having a head locked in a groove. In this specification, the term "support base" refers to a base on which a lead holder supporting a reed, a tack-in mechanism, a slide base holding a temple, and a plurality of other target members are mounted. In addition, "target member"
The term “nozzle members (including attachment members) such as sub nozzles and stretch nozzles”, feelers, saddles for electric wiring, tack-in mechanisms, temples, and other members fastened and fixed to the support base. [0003] As described above, a substantially T-shaped bolt, that is, a T-shaped piece, is used to fix a target member to a support base having a groove having a T-shaped cross section. 2. Description of the Related Art A device for locking and fixing a head in a T-shaped structure has been widely used. Also, in such a fastening device, the T-piece is formed into a T-piece by making the shape of the head rectangular or the like, and making the interval between the long sides smaller than the opening width of the T-shaped groove and making the interval between the short sides larger. There is one that can be inserted from the front face of the opening of the shaped groove. According to this, the head of the T-piece can be inserted into the T-groove at an arbitrary position regardless of the other members already attached, and can be locked by rotating the T-piece. Therefore, the target member can be attached at an arbitrary position. However, in the case of the above, there arises a problem that the fixed state is unstable. That is, when the head of the T-shaped piece is inserted into the T-shaped groove,
It is difficult to visually recognize the rotational phase of the head in the T-shaped groove, and it is actually impossible to confirm at all when the target member is attached. Therefore, fastening and fixing may be performed in a state where the head is only slightly engaged with the inner wall surface of the T-shaped groove, and the fixing state is very unstable. To solve such a problem, Japanese Patent Laid-Open Publication No.
There is a device proposed in U.S. Pat. As shown in FIG. 11, an example of the fastening device in the prior art is shown in FIG.
A non-circular engaging portion is provided on a shaft portion of the T-piece, and a hole of the target member into which the T-piece is inserted is formed so as to be unable to rotate relative to the engaging portion. According to the above construction, when the T-piece is set in a predetermined phase with respect to the target member, that is, when the target member is to be mounted on the support base (phase), rotation of the T-piece in the T-groove is performed. The engagement can be made such that the phase is such that a sufficient fixing force can be obtained and the phase cannot be relatively rotated. Therefore, the head of the T-piece can obtain a sufficient fixing force in the T-shaped groove only by setting the target member in a predetermined mounting state on the support base in a state where the T-piece and the target member are engaged. The rotation phase is reached, and that state is maintained during the fastening process. Therefore, the fixed state of the target member on the support base can be stabilized. [0007] The above-mentioned prior application T
In the shaped piece, the engaging portion is provided only in a portion of the shaft portion protruding from the opening of the T-shaped groove, and the portion located in the opening is such that the T-shaped piece can rotate 360 °. It remains a cylindrical shaft. Therefore, when looking at the shape of the T-shaped piece as a whole, there is a portion where the cross-sectional area increases on the way from the head to the threaded portion. For this reason, the following problems arise in production and strength. [0008] Parts such as T-pieces are used in large numbers per loom, so that mass production is required. In general, when a large number of simple shapes are to be produced, forging is used because the production cost per piece is high, such as cutting, and the processing is not complicated. However, in the case where there is a portion where the cross-sectional area increases on the way from the head to the tip as described above, if the forging die is integrated, the molded product cannot be pulled out, so that the die can be divided. Is required. For this reason, the steps of assembling and dividing the mold in the molding process increase, and the manufacturing cost of the mold increases.
The manufacturing cost per book increases and the processing operation becomes more complicated. Further, the T-piece may be used to fasten the target member to a movable part such as a lead holder of a loom. In this case, since a large vibration or impact is applied to the T-shaped piece, particularly the shaft located at the opening, via the target member, breakage occurs in this portion having a small cross-sectional area and inferior durability as compared with the engaging portion, The life of the T-piece is shortened. In view of the circumstances of the prior art, an object of the present invention is to provide a support base such as a lead holder of a loom through a T-piece having a head engaged with a T-groove thereof.
An object of the present invention is to improve the manufacturing processability and impact resistance of a T-shaped piece used in a target member fastening / fixing device of a type for fastening / fixing a target member such as a sub nozzle. According to the present invention, a T-piece can be inserted from the front opening of the T-groove, and the T-piece can be rotated by a predetermined angle. A head portion having a shape to be locked therein, a non-circular engagement portion engaged with the engagement hole of the target member so as to be relatively non-rotatable, and a threaded portion with a fastening nut. The mating portion has a cross-sectional area larger than the cross-sectional area of the screw portion, and extends with substantially the same cross-sectional shape from the head to at least the inside of the engagement hole of the target member in the fastened and fixed state, Further, the cross-sectional shape of the T-shape is set so that the head can pass through the front opening of the T-shape groove when the head can be inserted into the T-shape groove and the head is locked in the T-shape groove. The gist is set so as to be rotatable within the front opening of the groove. When the T-piece is rotated after the head of the T-piece is inserted into the T-groove, the head cannot be pulled out of the T-groove. Thereafter, when the target member is fitted into the engaging portion of the T-piece and the fastening nut is tightened, the head of the T-piece is locked in the T-shaped groove, and the target member is fastened and fixed to the support base. Further, an external force such as a vibration impact applied to the T-shaped piece via the target member is received by the engaging portion. FIG. 1 shows a lead holder which is a typical example of a support base. On the upper surface of the support base 1, an upper concave groove 11 for accommodating a reed frame is provided. A positioning groove 12 for positioning the target member is formed on the front surface. A T-shaped groove 13 having an opening 14 is formed behind the positioning groove 12. The T-shaped groove 13 extends in the direction in which the reeds are arranged in parallel.
It communicates with the space in front. In the example shown in FIG. 2, the sub-nozzle is mounted on a lead holder as a support base by the apparatus of the present invention, and a support block as a mounting member of the sub-nozzle is the target member 4. That is, in brief, the target member 4 supporting the sub-nozzle 5 is fastened and fixed to the support base 1 by the T-shaped piece 3 and the fastening nut 7 screwed thereto. In this state, the target member 4 of the T-piece 3 is locked in the T-shaped groove 13 of the support base 1. FIGS. 3 to 5 show one embodiment of a T-shaped piece 3 used in the fastening device according to the present invention. The T-shaped piece 3 has a head 31 to be locked in the T-shaped groove 13 of the support base 1, an engaging portion 32 fitted to the target member 4, and a threaded portion screwed to the fastening nut 7. 34, and a shaft portion 33 that connects the engaging portion and the screw portion. Although the head 31 has a rectangular cross-sectional shape with sharp ends at both ends in the illustrated example, the present invention is not limited to this. The head 31 has a rectangular or parallelogram cross-sectional shape. There may be. In short, the front opening 1 of the T-shaped groove 13
Any shape can be used as long as it can be inserted into the T-shaped piece 3 and cannot be pulled out in the T-shaped groove 13 by rotating the T-shaped piece 3 by a predetermined angle. However, in the case of a cross-sectional shape or a parallelogram as shown in the figure, when the T-piece 3 is rotated to make the head 31 unable to be pulled out, as shown in FIG. 31 end side is T
Since it is in contact with both side walls of the shape groove 13, there is an advantage that the fastening and fixing state is stable. In this respect, the parallelogram is more advantageous, but if the cross-sectional shape of the target is as shown in the figure, the processing by forging becomes easier. The engaging portion 32 has a substantially rhombic cross-sectional shape in the illustrated example, and extends from a position in contact with the head 31 to a position where it can be engaged with the target member 4. The cross-sectional shape is not limited to the illustrated one, but may be, for example, a parallelogram. In short, the front opening 1 of the T-shaped groove 13 when the head 31 is in a posture that can be inserted into the T-shaped groove 13.
4 can be passed and the head 31 can be rotated in the opening 14 to the extent that the head 31 has a predetermined rotation phase in the T-shaped groove 13. In the illustrated example, the engaging portions 32 extend in the same shape. However, the engaging portions 32 do not necessarily have to have the same shape, and may have a similar shape and a slightly reduced cross-sectional area. In the illustrated example, the engaging portion 32 and the threaded portion 34
And a cylindrical shaft part 33 is interposed between them.
May be omitted and the threaded portion 34 may be directly connected from the engaging portion 32.
The extending range of the engaging portion 32 only needs to extend from the head to at least the inside of the engaging hole of the target member in the fastened and fixed state. FIG. 6 shows an example of the target member 4. In this example, the engaging hole 41 formed in the target member 4 has a similar shape (i.e., rhombus) slightly larger than the cross-sectional shape of the engaging portion 32 of the T-shaped piece 3, but the shape of the engaging hole 41 is not necessarily similar. It is not limited to the shape. In short, any combination of the cross-sectional shapes of the engagement portion 32 of the T-shaped piece 3 and the target member 4 may be used so that the two cannot engage with each other. FIG. 7 shows an example of the state of fastening and fixing by the apparatus of the present invention having the above-described configuration, and the operation of fastening and fixing the target member 4 to the support base 1 will be described. In the case of the T-shaped piece 3 as shown in FIG. 5, the direction of two long sides (upper and lower sides in FIG. 5) of the head 31 facing each other is adjusted to the front opening 14 of the T-shaped groove 13.
The head 31 is inserted into the T-shaped groove 13 through the front opening 14 while keeping the posture parallel to the upper and lower edge lines. Then, when the T-piece 3 is rotated, the direction of the two long sides intersects the edge of the front opening 14, so that
The head 31 of the shaped piece 3 is temporarily in a state where it cannot escape from the T-shaped groove 13. However, the posture is an appropriate phase, and a predetermined phase (that is, the contact area between the upper and lower surfaces of the head and the inner wall surface of the T-shaped groove is such that a sufficient fixing force to the target member can be obtained. Is not necessarily the same phase). Next, the target member 4 is engaged with the T-shaped piece 3 in the state where the extraction is impossible. At this time, the engagement portion 32 of the T-piece 3 and the engagement hole 41 of the target member 4 are in a fitted state as shown in FIG.
And the target member 4 cannot be rotated relative to each other. Thereafter, the target member 4 is fitted into the positioning groove 12 so as to have a predetermined mounting phase, and the fastening nut 7 is screwed into the screwing portion 34 of the T-shaped piece 3, as shown in FIG. The target member 4 is fastened and fixed to the support base 1. When the target member 4 is set to the mounting phase in this manner, the head 31 of the T-shaped piece 3 becomes the predetermined phase from the appropriate phase in the T-shaped groove 13 and is locked, for example, as shown in FIG. Because However, the procedure of the fastening and fixing work is not limited to the above. For example, first, the T-piece 3 and the target member 4 are fitted to each other, and then the fastening nut 7 is temporarily tightened to the T-piece 3.
Is inserted into the T-shaped groove 13 of the support base 1, the target member 4 is set in the mounting phase, and the fastening nut 7 is fully tightened.
Are locked in the T-shaped groove 13 with a predetermined locking phase. In the example shown in FIG. 10, the T-piece 3
The compression spring 6 is interposed between the engaging portion 32 and the target member 4. By interposing the spring in this manner, the target member 4 is constantly urged forward with respect to the T-shaped piece 3. Therefore, when the fastening and fixing are released, the target member 4 is lifted up from the positioning groove 12 of the support base 1 only by loosening the fastening nut 7. Can be performed, so that the work becomes much easier. According to the present invention, the engaging portion of the T-piece extends from the head, and the overall configuration of the T-piece is such that the cross-sectional area decreases stepwise from the head to the tip. Therefore, it can be manufactured at low cost by forging using an integrated mold. Further, since vibrations and impacts when the target member is attached to the movable portion are received by the engaging portion having a larger cross-sectional area than the conventional shaft portion, the durability of the T-shaped piece is improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a configuration of a support base. FIG. 2 is a side view showing an arrangement state of the fastening device according to the present invention. FIG. 3 is a perspective view showing an example of a T-piece used in the present invention. FIG. 4 is a side view of the same. FIG. 5 is also an end view. FIG. 6 is a front view illustrating an example of a target member. FIG. 7 is a partially sectional side view showing an example of a fastening and fixing state by the device of the present invention. FIG. 8 is an explanatory view showing a locked state between a T-shaped piece and a T-shaped groove. FIG. 9 is an explanatory diagram showing a fitting state between a T-piece and a target member. FIG. 10 is a partial sectional side view showing an example of a fastening and fixing state by the device of the present invention. FIG. 11 is a perspective view showing an example of a T-shaped piece used in the prior art. [Description of Signs] 1: Support base 13: T-shaped groove 2: Reed 3: T-shaped piece 31: Head 32: Engagement part 33: Shaft part 34: Screw part 4: Target member 41: Engagement hole 7: Fastening nut

Claims (1)

(57) [Claim 1] A T which is locked in a T-shaped groove on a support base.
A type in which a target member having an engagement hole with a T-piece is fastened and fixed via the T-piece, wherein the T-piece is insertable from a front opening of the T-groove and a predetermined shape of the T-piece. A head portion shaped to be locked in the T-shaped groove by the angular rotation, a non-circular engaging portion engaged with the engaging hole of the target member so as to be relatively non-rotatable, and a threaded portion with the fastening nut. Wherein the cross-sectional area of the engaging portion is greater than the cross-sectional area of the threaded portion, and the cross-sectional shape is substantially the same from the head to at least the inside of the engaging hole of the target member in the fastened and fixed state. And its cross-sectional shape is such that when the head is in a position that can be inserted into the T-shaped groove, the head can pass through the front opening of the T-shaped groove and the head is locked in the T-shaped groove. A target member in the loom, wherein the target member is set so as to be rotatable within the front opening of the T-shaped groove until the state is reached. Fastened and fixed equipment.