JPH0111753Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Application and Outline of the Invention) The present invention is an apparatus for manufacturing a embroidered carpet by mechanically running a hook machine along a preset trajectory, and in particular, a device that supports the above-mentioned hook machine. By reducing the load when the hook machine comes into contact with the base fabric, the bending of the base fabric on which the pile yarn is embroidered due to the load is reduced, and the running trajectory of the hook machine and the woven pattern are improved. This makes it possible to reduce the discrepancy between the two.

(Prior art and its problems) In the production of embroidered carpets, the method of using a hook machine has the advantage of allowing large variations in the design, and is used to produce carpets with pictorial designs.

This hook machine was developed for hand weaving.
As shown in FIG. 5, an operator uses the hook 1 by running it along a predetermined pattern while bringing the guide piece 14 of the hook 1 into contact with the base fabric A stretched over the frame 2. As a result, the movable cylinder 11 of the needle mechanism section 10 at the tip of the hook machine 1, the insertion piece 12, and the scissors 1
3 operates in steps a to d in Fig. 6, and the hook machine 1
The pile thread B is inserted into the base fabric A, and when the hook machine 1 is run over the entire area of the base fabric, the stitching of a predetermined pattern is completed.

Conventionally, all of the above operations were performed manually, resulting in insufficient productivity. Therefore, in order to increase this productivity, the hook machine 1 is mechanically run along the base fabric, and its running trajectory is
One possible method is to control the entire embroidery area using an NC device that operates based on a program that corresponds to the weaving pattern. It is necessary to divide the stitching into sections, lower the hook machine 1 onto the base fabric A at the starting point of each stitching section, and lift it up to a predetermined height at the end point.

In the case where the lifting and lowering of the hook machine is performed mechanically at predetermined timing, when the hook machine 1 is lowered directly by the driving force of the lifting drive device such as an air cylinder, the hook machine 1 is lowered as shown in Fig. 7. The traveling locus P of No. 1 and the woven pattern Q may be significantly different from each other.

In the case of the above-mentioned lowering operation, in addition to the weight of the hook machine 1, the lowering driving force by the lifting drive device acts as a downward load from the guide piece 14 on the base fabric A,
This is because the base fabric A is greatly bent.

That is, when the bending of the base fabric A is large at the portion where the guide piece 14 contacts, the distance L from the end of the base fabric A to the center of the hook machine 1 on the X-axis-Y-axis plane as shown in FIG. This is because the distance M along the base fabric A in the bent state is greatly different, and the deviation between the above-mentioned running locus and the woven pattern is particularly significant in the vicinity of the frame 2.

(Technical Problem) In the present invention, the hook machine 1 is mechanically moved in the X-axis-Y-axis plane parallel to the base fabric A stretched on the frame 2, as described above, and during this movement, the hook machine 1 is Hook machine 1
In the case where the hook machine 1 is brought into an operating state and the hook machine 1 is mechanically lowered to the base fabric A side so that the guide piece 14 is brought into contact with the base fabric A, there is a discrepancy between the running trajectory of the hook machine 1 and the woven pattern. The technical problem is to reduce the downward load acting on the guide piece 14.

(Means) The technical means of the present invention taken to solve the above technical problem is to couple the hook machine 1 to a support 5 provided on the traveling platform 4 so that it can rise and fall freely, and output power only when the hook machine 1 is pulled up. The above-mentioned pillar 5 is provided with a lifting device that allows the hook machine 1 to move upward, and the pillar is equipped with a biasing means for applying an upward biasing force to the hook machine 1 when the hook machine 1 is in the lowered position.

(Operation) The above technical means of the present invention operates as follows.

When the lifting device is in the output state, the hook machine 1 is pulled up to a predetermined height position, and when the lifting device is in the non-output state, the hook machine 1 descends along the support 5 due to its own weight. The guide piece 14 of the needle mechanism section 10 of the hook machine 1 is attached to the base fabric A.
oppose to.

In this state, the hook machine 1 is brought into operation, and the hook machine is made to travel together with the carriage 4 within the X-axis-Y-axis plane, and the stitching operation progresses. When the stitching operation for one stitching section is completed, the lifting device goes into the output state and the hook machine 1 is pulled up to a predetermined height.

In the hook machine running state, the hook machine 1 is in a descending state, and at this time, an upward biasing force is applied to the hook machine 1 by the biasing means, so that the load of the hook machine 1 and its attachments is reduced. Only the load after subtracting the biasing force acts on the base fabric A. Therefore, the amount of deflection of the base fabric during running of the hook machine is reduced.

(Effects) Since the present invention has the above configuration, it has the following unique effects.

Since the amount of deflection of the base fabric when the hook machine 1 is mechanically lowered in accordance with the stitching operation is reduced, the deviation between the travel locus of the hook machine and the woven pattern is reduced.

Furthermore, since the load from the hooking machine 1 acting on the base fabric A is reduced, the inconvenience of stretching the base fabric during the embroidery work can be prevented.

(Example) In the first embodiment shown in FIGS. 1 to 3, a support base 3 that moves in the Y-axis direction of the frame 2, and a traveling base 4 that moves on this support base in the X-axis direction. The hooks are moved synchronously by two pulse motors 31 and 41 that operate based on the output from the NC device N, and the hook machine installed on the traveling platform moves along the base fabric A stretched over the frame 2. The vehicle then travels within the X-axis-Y-axis plane, and this traveling locus can be set to a predetermined value based on data input into the NC device N in advance.

Therefore, the stitching work over the entire area of the base fabric A can be performed automatically and continuously by the output of the NC device, and the woven design can also be changed by changing the input data to the NC device N.

In addition, the hook device 1 is fixed to a mounting base 51 that is coupled to the support column 5, as shown in FIG.
The column is attached to an annular gear 43 which is rotationally driven by an auxiliary pulse motor 42. The position of the support 5 and the size of the mounting base 51 are respectively set appropriately so that the gear and the hook machine 1 are coaxially located.

The base of the mount 51 is connected to the output shaft 61 of the air cylinder 6 as a lifting device, and when this air cylinder is in the output state, the hook machine 1 is pulled up to a predetermined height together with the mount 51, and the air cylinder 6 is in the non-output state. In this state, the hook machine 1 descends downward through the central opening 44 of the gear 43.

In this embodiment, the air pressure supply circuit to the air cylinder 6 is configured as shown in FIG.
1 and the empty chamber 62 on the opposite side to the open state, and the output shaft 6
A switching valve 6 connects air pressure from a pressure source to the empty chamber 63 on the 1 side.
4, and the exhaust pressure control valve 65 sets the exhaust pressure to a predetermined value in the exhaust side circuit of the switching valve 64.
is inserted. Therefore, when the air cylinder 6 is in a non-output state, the switching valve 64 switches to open the empty chamber 63.
The piston 6 and the exhaust circuit communicate with each other, and the piston 6
6, the output shaft 61 is lowered while the pressure set by the exhaust pressure control valve 65 is applied, and the lowering force of the hook machine 1 is reduced by a load corresponding to the upward biasing force caused by this pressure. The Rukoto.

Therefore, in this embodiment, the exhaust side circuit of the air cylinder 6 and the exhaust pressure control valve 65 provided in this circuit are
The combination functions as the biasing means described above.

Next, the second embodiment shown in FIG. 4 is generally similar to the first embodiment, but the mounting base 5
A compression spring 60 is interposed between the air cylinder 1 and the support column 5 to apply an upward biasing force, and as in the first embodiment, when the air cylinder 6 is in the non-output state, the output shaft 61 is No lifting force is applied,
In this state, the hook machine 1 is lowered together with the mounting base 51, and in this lowered state, an upward biasing force is applied by the compression spring 60, so that the hook machine 1 functions in the same manner as in the first embodiment.

In addition, in any of the embodiments described above, the auxiliary pulse motor 42 and the air cylinder 6 are also used together with the two pulse motors 31 and 41 that drive the traveling platform 4.
It is controlled by the NC device N, and each part operates according to the data read into the NC device N, and the traveling trajectory of the hook machine 1 is set to a predetermined value by the two pulse motors 31 and 41. The running posture of the hook machine 1 is controlled by the auxiliary pulse motor 42 according to the running direction, and the hook machine 1 is raised and lowered at a predetermined timing by the air cylinder 6 for each stabbing section. .

Further, in each of the embodiments, the guide piece 14 is a dish-shaped body with a through hole in the center. By adopting this type of guide piece, the direction change of the hook machine becomes smooth, and moreover, The ends of the inserted pile yarn B will not be caught on the guide piece when the hook machine runs or changes direction.

[Brief explanation of drawings]

Fig. 1 is a plan view of the first embodiment of the present invention, Fig. 2 is a sectional view of the main parts, Fig. 3 is an explanatory diagram of the pneumatic circuit of the air cylinder 6, and Fig. 4 is the main part of the second embodiment. Figure 5 is an explanatory diagram of hand-weaving using a known hook machine, Figure 6 is an explanatory diagram of the stitching operation of this hook machine, and Figure 7 is the relationship between the running trajectory of the hook machine and the woven pattern. Figure 8 is an explanatory diagram when the load of the hook machine is applied to the base fabric, and in the figure, 1...
...Hook machine, 14...Guide piece, 4...Traveling platform,
5... Support, A... Base fabric.

Claims (1)

[Scope of utility model registration request] The hook machine 1 is mechanically moved in the X-axis-Y-axis plane parallel to the base fabric A stretched on the frame 2, and during this movement, the hook machine 1 is put into an operating state and the hook machine 1 is mechanically moved. 1 is lowered to the side of the base fabric A so that the guide piece 14 is brought into contact with the base fabric A, and the hook machine 1 is attached to a support 5 provided on the running platform 4 so as to be able to rise and fall freely. The above-mentioned pillar 5 is equipped with a pulling device that is in an output state only when pulling up.
A hook machine supporting device in a embroidered carpet manufacturing apparatus, wherein the support is provided with a biasing means for applying an upward biasing force to the hook machine 1 at the lowered position of the hook machine 1.