JP2003064571A - Multi-needle head in needle-punching machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multi-needle head which facilitates the exchange of punching needles. SOLUTION: A guide groove 14 opened on the outer peripheral one side of a pedestal holder 11 is formed on the lower side of the pedestal holder 11 attached to the lower end of a needle rod, and vertically penetrated many needle-inserting holes 23 are formed in the upper pedestal 17 of a needle holder 12 to be pulled from or inserted into the guide groove 14. Punching needles N are inserted into the needle-inserting holes 23, and crank portions n2 disposed in the head portions of the punching needles N are nipped with the pedestal 17 and the pedestal holder 11 to fix the punching needles N. The pedestal 17 of the needle holder 12 is pulled out from the groove 14 to exchange the punching needles N.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a needle punching machine in which a large number of punch needles are pierced through a non-woven material such as felt laminated on a base material to fix the non-woven material on the base material. The present invention relates to a multi-needle head.

[0002]

2. Description of the Related Art In a needle punching machine, a multi-needle head is attached to the lower end of a vertically moving needle bar, and a large number of punch needles implanted in the multi-needle head are mounted on a needle plate as a base material. , The non-woven material placed on it is pierced, and the fibers of the non-woven material applied to the barbs (thorns) formed on each punch needle are entangled with the base material to fix the non-woven material. There is.

The punch needle provided on the multi-needle head has a blade portion at the tip of the shank portion and a plurality of barbs formed on the blade portion, similarly to a generally known felt needle.

Since the blade portion of the punch needle is extremely thin, and the thickness at the barb forming position is extremely thin, it is easily broken by repeated piercing of the base material and the non-woven material.

At this time, if the punch needle is integrated with the multi-needle head, it becomes necessary to replace the multi-needle head itself, which causes a problem in economic efficiency.

In order to solve such a problem, in the multi-needle head disclosed in Japanese Unexamined Patent Publication No. 11-350328, a plurality of vertical holes lined up at equal intervals in the width direction of the pedestal are formed in the needle clamp pedestal. Formed at intervals in the length direction of the pedestal,
A screw hole having a closed end is formed so as to penetrate a plurality of vertical holes arranged in the width direction of the pedestal from the side surface of the pedestal, and the same number of setscrews as a plurality of vertical holes are screwed into the screw hole. The punch needle inserted into each vertical hole is fixed by tightening, and the punch needle can be replaced by loosening the set screw.

[0007]

By the way, in the multi-needle head described in the above publication, since the screw hole has the closed end, the vertical hole located from the vertical hole on the closed end side to the open end side of the screw hole. It becomes necessary to fix the punch needle in order toward the holes. For this reason, when trying to replace the punch needle fixed to the vertical hole on the closed end side of the screw hole, it is necessary to remove the set screw and punch needle in front of it, which is very time-consuming to replace. There is.

An object of the present invention is to provide a multi-needle head in a needle punching machine in which the punch needles can be easily replaced due to breakage or the like.

[0009]

In order to solve the above-mentioned problems, according to the present invention, a pedestal holder attached to the lower end of the needle bar of a needle punching machine and a lower surface of the pedestal holder are detachably attached. It is composed of a pedestal and a large number of punch needles having a crank portion formed on the head, and the pedestal is provided with a large number of needle insertion holes extending vertically, and the crank portions of the punch needles inserted into the respective needle insertion holes are A pedestal holder,
The structure is such that it is clamped by the pedestal attached to the pedestal holder.

With the above arrangement, the punch needle can be pulled out onto the pedestal by removing the pedestal from the pedestal holder, thereby making it possible to pull out the punch needle from the pedestal holder. It can be easily replaced.

Here, if guide plates are provided below the pedestal at intervals and a guide hole through which a punch needle is inserted is formed in the guide plate, the middle of the punch needle can be supported by the guide hole of the guide plate. Therefore, the stability of the punch needle is good, and it is possible to effectively prevent the punch needle from being broken.

In the multi-needle head according to the present invention, as a means for detachably supporting the pedestal, a guide groove is formed on the lower surface of the pedestal holder from the outer peripheral surface of the pedestal holder to the opposite surface, and the guide groove is By adopting a structure in which the pedestal can be inserted and removed freely, the pedestal can be attached and detached very easily.

In this case, when the pedestal is inserted into the guide groove of the pedestal holder and an elastic member for pressing the pedestal against the lower surface of the top wall of the guide groove is provided, the pedestal can be stably attached to the pedestal holder. .

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a needle plate 2 is attached to a bed 1 of a needle punching machine, and a pressing plate 3 is provided on the needle plate 2. The pressing plate 3 is moved up and down by operating a lever (not shown), and when descending, presses the base material A placed on the needle plate 2 and the non-woven material a superposed on the base material A. .

A multi-needle head 10 is attached to the lower end of a needle bar 4 which is vertically movable with respect to the needle plate 2. The multi-needle head 10 moves up and down together with the needle bar 4, and when the multi-needle head 10 descends, a large number of punch needles N held by the multi-needle head 10 are pierced through the needle holes formed in the pressing plate 3 and the needle plate 2. It has become.

As shown in FIG. 3, the punch needle N comprises a felt needle, and a shank portion n ₁ consisting of a stepped round shaft is provided with a crank portion n ₂ which bends sideways. A plurality of barbs (not shown) are provided on the blade portion n ₃ provided at the tip of the portion n ₁ .

As shown in FIGS. 2 to 4, the multi-needle head 1
0 consists of a pedestal holder 11 and a needle holder 12. The pedestal holder 11 has a rectangular parallelepiped shape, and a bracket 13 is detachably attached to the lower end of the needle bar 4 by tightening a screw on the upper surface thereof.

A guide groove 14 extending to the left and right end surfaces is provided on the lower surface of the pedestal holder 11, and an opening at one end of the guide groove 14 is closed by an end plate 15 screwed to the end surface of the pedestal holder 11. .

Guide plates 16 are attached to the lower surfaces of the front wall and the rear wall of the guide groove 14, respectively, and the opposing edges of each guide plate 16 project to the lower surface opening of the guide groove 14 so that the facing distance is equal to that of the guide groove 14. It is smaller than the width dimension.

The needle holder 12 is a cuboid base 1
7 is provided at the upper part, and two guide plates 18 and 19 are provided below the pedestal 17 with a space therebetween. The pedestal 17 and the two pedestals 17 are fixed by tightening the through bolts 21 penetrating the pedestal 17 and the two guide plates 18 and 19 and the spacer 20 and the nuts 22 screwed to the through bolts 21. The guide plates 18 and 19 are connected to each other.

A large number of needle insertion holes 23 penetrating vertically are formed on the pedestal 17, and punch needles N are inserted in the respective needle insertion holes 23.
Has been inserted.

The punch needle N has two guide plates 1
The guide hole 24 is formed in each of the holes 8 and 19, and the central portion and the lower portion of the shank portion n ₁ are supported by the guide holes 24.

Here, the needle insertion hole 2 formed in the pedestal 17
The arrangement of 3 is arbitrary, and in the example shown in FIG. 5, a plurality of needle insertion holes 23 arranged in a row in the left-right direction of the pedestal 17 at equal intervals.
Are provided at equal intervals in the front-rear direction of the pedestal 17, and the needle insertion holes 23 in the adjacent rows are displaced by a half pitch position so that a large number of needle insertion holes 23 are formed.
Is a staggered arrangement.

The pedestal 17 of the needle holder 12 can be inserted into and removed from the guide groove 14 through the opening of the other end surface of the pedestal holder 11. A retaining piece 25 for retaining the pedestal 17 inserted into the guide groove 14 is attached to the other end surface of the pedestal holder 11 by tightening a screw 26, and a spring washer is provided between the head of the screw 26 and the retaining piece 25. 27 are provided.

Here, the screw insertion hole 28 provided in the retaining piece 25 is a long hole extending in the vertical direction so that the retaining piece 25 can be moved up and down while the screw 26 is tightened. By pulling up the retaining piece 25, the retaining of the pedestal 17 can be released.

As shown in FIG. 3, a leaf spring 29 as an elastic member is attached to the surface of the end plate 15. The leaf spring 29 has a pair of elastic pieces 29a at its lower end, and each elastic piece 29a
The a is engaged with the lower surface of the pedestal 17 inserted into the guide groove 14 to give the pedestal 17 an upward elastic force.

On the other hand, a leaf spring 30 as an elastic member is attached to the other end surface of the pedestal 17. The leaf spring 30 has a pair of elastic pieces 30a at the lower end, and each elastic piece 30a presses the end portions of the pair of guide plates 16 in the inserted state of the pedestal 17 into the guide groove 14, and the pedestal by the reaction force due to the pressing. An upward elastic force is applied to 17. The clamp portion n ₂ of the punch needle N is elastically held between the base 17 and the lower surface of the top wall of the guide groove 14 by the elastic force applied to the base 17.

Now, a pedestal holder 11 is attached to the lower end of the needle bar 4 shown in FIG. 1, and a needle holder 12 for supporting a large number of punch needles N is attached to the pedestal holder 11 and the needle bar 12 is moved up and down together with the needle bar 4. When moved, a large number of punch needles N are pierced through the base material A and the non-woven material a which are pressed down by the presser plate 3 when descending, and by the piercing, fibers of the non-woven material a related to the barbs of the punch needle N are pierced. Is pushed into the base material A and entangled, and the entanglement holds the non-woven material a in an attached state.

The punch needle N has a blade portion n _{3 which} is extremely thin, and the barb formed on the blade portion n ₃ has a very thin thickness. The punch needle N may be broken by repeated piercing, and if it is broken, it needs to be replaced.

When the punch needle N is replaced, the retaining piece 25 attached to the other end surface of the pedestal holder 11 is pushed up, and the pedestal 1 of the needle holder 12 is guided through the guide groove 14.
7 and pull out the pedestal holder 11 to the needle holder 12
With the punch needle N broken, the pedestal 1
7, and a new punch needle N is inserted into the guide hole 24 from the needle insertion hole 23.

As described above, since the punch needle N can be pulled out upward by removing the needle holder 12 from the pedestal holder 11, the broken punch needle N can be efficiently replaced in a very short time.

After replacing the punch needle N, the needle holder 12
When the pedestal 17 is inserted into the guide groove 14 of the pedestal holder 11, the elastic pieces 29a and 30 formed on the leaf springs 29 and 30 are formed.
The pedestal 17 is pushed up by pressing a, and the pedestal 17
The crank portion n ₁ of the punch needle N is sandwiched between and the top wall of the guide groove 14 formed in the pedestal holder 11. The punch needle N is fixed by the sandwiching.

In this way, the needle insertion hole 23 of the pedestal 17 is inserted.
Crank part n of the punch needle N inserted ₂Of the guide groove 14
The punch needle N is fixed by being sandwiched between the top wall and the pedestal 17.
Therefore, a large number of needle insertion holes 23 can be formed in the pedestal 17.
And the planting density of punch needles N can be increased.
It

As shown in the embodiment, the needle holder 12 is provided with two guide plates 18 and 19, and each guide plate 1
By supporting the shank n ₁ of the punch needle N with the guide holes 24 formed in the holes 8 and 19, the punch needle N has a high supporting rigidity and the breakage of the punch needle N can be effectively prevented.

In the embodiment, the guide groove 14 is formed in the pedestal holder 11 and the pedestal 17 is attachable to and detachable from the guide groove 14, but the attaching / detaching means is not limited to this. For example, the pedestal 17 supporting the punch needle N on the lower surface of the pedestal 11
Alternatively, the pedestal 17 may be removably attached to the pedestal holder 11 by stacking and tightening with bolts, nuts, or clamps.

[0036]

As described above, according to the present invention, since the punch needle can be pulled out from the pedestal by removing the pedestal from the pedestal holder, the broken punch needle can be replaced very easily in a short time. it can.

Further, since the punch holder is fixed by clamping the crank portion of the punch needle by the pedestal holder and the pedestal which is attached to and detached from the pedestal holder, a large number of needle insertion holes are formed in the pedestal. It is possible to increase the implantation density of punch needles.

[Brief description of drawings]

FIG. 1 is a perspective view of a needle punch machine equipped with a multi-needle head in a needle punch machine according to the present invention.

FIG. 2 is a perspective view of the multi-needle head shown in FIG.

FIG. 3 is a partially cutaway front view of the multi-needle head shown in FIG.

FIG. 4 is an exploded perspective view of the multi-needle head shown in FIG.

5 is a plan view of a base of the multi-needle head shown in FIG.

[Explanation of symbols]

4 Needle bar 11 Base holder 14 Guide groove 17 Base 18, 19 Guide plate 23 Needle insertion hole 24 Guide hole 29, 30 Leaf spring (elastic member) N Punch needle n ₂ Crank part

Claims (4)

[Claims] 1. A pedestal holder attached to a lower end of a needle bar of a needle punching machine, a pedestal detachably attached to a lower surface of the pedestal holder, and a large number of punch needles having a crank portion formed on a head. In the pedestal, a plurality of needle insertion holes vertically passing therethrough are provided, and the crank portion of the punch needle inserted in each needle insertion hole is clamped by the pedestal holder and the pedestal attached to the pedestal holder. Multi-needle head in the needle punch machine. 2. A multi-needle head for a needle punching machine according to claim 1, wherein a guide plate is provided below the pedestal at intervals, and a guide hole into which a punch needle is inserted is formed in the guide plate. 3. Means for detachably supporting the pedestal,
The needle punching machine according to claim 1 or 2, wherein a guide groove is formed on the lower surface of the pedestal holder from one surface of the outer periphery of the pedestal holder to the opposite surface, and the pedestal can be inserted into and removed from the guide groove. Multi-needle head. 4. The multi-needle head for a needle punching machine according to claim 3, wherein an elastic member is provided to press the pedestal against the lower surface of the top wall of the guide groove in a mounted state in which the pedestal is inserted into the guide groove of the pedestal holder.