JP7266410B2 - Mounting device for filamentary connecting body - Google Patents

Description

The present invention relates to a device for mounting a filament-like connecting body, in particular, a filament made of stretched plastic or thread, at one end of which is provided a cylindrical head having a locking claw on the inner wall thereof, and at the other end of the above-described cylindrical head. Improvement of a mounting device for a filament-like connecting body for mounting a filament on an object in a ring shape by providing a connecting body which is inserted into a hole and engaged with a locking pawl, especially for supporting a head-carrying arm Regarding structural improvement.

The above-described mounting device is disclosed in Japanese Patent No. 3710123 (Patent Document 1), which the applicant obtained the right and disclosed. The summary and the support structure of the head carrying arm 4 improved by the applicant this time will be explained with reference to FIG.

FIG. 6 shows the entire mounting device. The main body (casing) of the apparatus is formed into a substantially pistol-shaped hollow shape by combining left and right main bodies 2a and 2b. A trigger lever 3 is provided in front of the grip portion 2c (grip) of the apparatus main body, and the internal mechanism is operated by pulling the trigger lever 3. As shown in FIG.

A filament-like connecting body L used by this apparatus main body has a filament f made of stretched plastic or thread, and has a cylindrical head h at one end and an engaging head h at the other end. It has a connecting portion k inserted into the joint hole (through hole) b, and the head h and the connecting portion k are connected to the runners J and J via connecting portions (cutting portions) c, respectively. Engagement claws t, t are formed on the inner wall surface of the engagement hole b of the head h, and the neck portion (engagement stepped portion) a of the joint k engages with the engagement claws t, t. A locked state is established, and the filament f is formed into a ring shape.

As shown in FIG. 6, grooves 6b and 6a for conveying and guiding the head h and the connecting portion k are provided on one side surface of the main body of the apparatus. A hollow needle 5 is provided for pushing the joint k with a rod and further pushing it into the engaging hole b of the head h.

A head-carrying arm 4 for conveying the head h to a position corresponding to the tip of the hollow needle 5 is provided in the upper front part of the main body of the apparatus. When the trigger lever 3 is pulled, the head-carrying arm 4 is actuated by a lever or a link mechanism, and is stopped and positioned at a position where the connecting portion k is pushed out from the tip of the hollow needle 5 .

The mechanism of the head-carrying arm 4 and other operating mechanisms are disclosed in detail in Patent Document 1, but the operating mechanism of the head-carrying arm 4 will be explained here again as shown in FIGS. 10, it is a link mechanism that operates in conjunction with the movement of the piston 9 that is operated by pulling the trigger lever 3. As shown in FIG.

The operating mechanism of the head carrying arm 4 is mounted on the second of the first and second bases 20, 22 arranged in parallel within the hollow body. The first base 20 is mounted with a head transport gear, a joint transport gear and a piston mechanism corresponding to the guide grooves 6b and 6a of the head and the joint.

7 to 10, 17 is an L-shaped first link, and this first link 17 has a lever actuating portion 9g at the tip of the piston 9 protruding from the side surface of the first link 17. The portion 17a rotates while being guided by contact with the advance cam surface 9h, and when the piston 9 returns, it slides in contact with the retreat cam surface 9i, is fitted into the groove portion 9k, and engages with the retreat cam surface 9i. ends. Incidentally, 10 in the figure indicates a rod.

The other end of the first link 17 is fitted into the two crotches of the second link 18 and pivotably pinned, and the lower end of the third link 4b is pivotably pinned to the tip of the second link 18. A shaft 14h of a head feeding gear (not shown) is inserted through a through hole 4c formed in the middle of the third link 4b, so that the third link 4b can swing back and forth.

A pair of links arranged parallel to the third link 4b, or a fourth link 4a having a bifurcated tip, and the horizontal part of the head carrying arm 4 is pinned to the end of the third link 4b. be. The head-carrying arm 4 is operated along a predetermined path by such a link mechanism, and one end (lower end side surface) of the fourth link 4a comes into contact with the shaft 14h to stop the operation of the link mechanism, and the head-carrying arm is operated. The central axis of the engaging hole b of the head h supported by the head support portion 4d of the needle 4 is aligned with the axis of the hollow needle 5 to accommodate the insertion of the connecting portion k.

However, the conventional support structure for the head conveying arm 4, in other words, the shaft 14h of the head feed gear that oscillatably supports the third link 4b is a hollow resin structure erected on the wall surface of the first base 20. It has a structure in which a metal (SUS) collar 30 is placed on the protrusion 31, and a shaft 14h is passed through the through hole.

Therefore, when the operation of the head carrying arm 4 is stopped and the head h is positioned at the position corresponding to the hollow needle 5, part of the fourth link 4a abuts (collides) with the collar 30 as a stopper. Due to the impact caused by this contact, a large load is applied to the collar 30 and the projection 31 on which it is placed, and repeated use inevitably causes damage such as cracks and breakage.

Japanese Patent No. 3710123

The problem to be solved by the present invention is that the link mechanism for operating the head-carrying arm 4 in the conventional filament-like connecting body mounting device is such that the head-carrying arm 4 pushes the combined body. At the time of positioning to stand by against, a part of the fourth link collides with the shaft 14h of the head feed gear as a stopper, or at least the projection 31 through which the shaft 14h is inserted and the collar 30 on which the shaft 14h is inserted, causing an impact. Therefore, the projection 31 and the collar 30 are damaged by repeated use.

In order to solve this problem, the filament-like connecting body mounting device according to the present invention has a cylindrical head having a locking claw on the inner wall at one end of the filament, and the head at the other end. A filament-like connecting body mounting device for forming a filament into a ring by fitting the connecting body to the head of the connecting body that is inserted into the cylinder of and engaged with the locking pawl, A trigger lever is provided in front of the grip of a pair of left and right hollow device main bodies, and a parallel link mechanism is provided that is actuated by at least the activation of the trigger lever. In the mounting device for filament-like connecting bodies provided with carrying arms, the support structure of the head carrying arms is a bearing fitted in through holes formed in the left and right bases in the main body of the device as support shafts, and the left and right bases support the head. It is characterized in that it is configured to support the conveying arm.

Further, in the filament-like connecting body mounting device according to the present invention, the bearing is a cylindrical body molded of synthetic resin, and the synthetic resin is polyacetal (POM), One side of the inner wall of the through hole of the bearing is thick.

The mounting device for the filament-like connected body according to the present invention is constructed as described above. Therefore, the head-carrying arm 4, or at least the link mechanism for operating it, is inserted into a through-hole of a size larger than that of the conventional one in the first and second bases 20 and 22, and a bearing is inserted into the bearing. Since the shaft 14h of the feed gear is inserted, even if part of the fourth link collides as a stopper, the impact load will be received by the entire bases 20 and 22 in which the bearings are fitted. Also, since the load that normally supports the load of the linkage mechanism is also distributed to the bases 20, 22, the load received by the bearings themselves is reduced and the risk of damage is reduced.

It is a cross-sectional perspective view which shows the principal part of this invention. It is the same perspective view. It is a perspective view of a bearing used in the same. It is a front view of the same second base. It is the same rear view. It is a right view which shows a mounting apparatus. FIG. 10 is a diagram showing the operating mechanism of the head carrying arm; It is a figure which shows the same operation state. It is a figure which shows the same operation state. It is a figure which shows the same operation state and shows a stop state. FIG. 10 is a front view showing an assembly of filamentary links; It is the same side view. 1 is a perspective view showing a conventional support structure; FIG. It is a cross-sectional perspective view which shows the same principal part.

It was realized by the configuration shown in the drawings and described in the examples.

A preferred embodiment of the present invention will now be described with reference to FIGS. 1 to 5. FIG. The parts common to the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. In this embodiment, the first base 20 and the second base 22 are provided with through holes 32a and 32b having diameters larger than those of the conventional one, at opposing positions.

In the through holes 32a and 32b, each end of a cylindrical bearing 33 made of plastic, particularly polyacetal (POM) having excellent strength, elasticity, impact resistance, and abrasion resistance, is tightly packed. is inlaid. Then, the shaft 14h of the head feed gear is inserted here, as in the conventional case, and the shaft 14h protrudes toward the second base.

The bearing 33 has a step 33a on the inner wall surface, a thick wall on the side of the second base 22, and a structure in which the supporting force on the free end side of the shaft 14h is increased to prevent the shaft 14h from being loose. there is

This embodiment is configured as described above. The first and second bases 20, 22 are formed with through holes 32a, 32b having a larger diameter than conventional ones, and the through holes 32a, 32b are made of plastic, which is also polyacetal (POM) having excellent properties. Since each end of the cylindrical bearing 33 is closely fitted, the weight load of the operating mechanism (link mechanism) of the head carrying arm 4 is also transferred to the first and second bases 20 via the bearing 33. , 22, and even if part of the fourth link 4a collides during positioning, there is no fragile portion, and there is extremely little risk of damage. It is durable for use.

Although polyacetal (POM) is used as the material for the bearing 33 in this embodiment, it is not limited to this, and may be substituted with polyamide, polycarbonate, modified polyphenylene ether, polybutylene terephthalate, etc., which have similar properties. Further, it goes without saying that the configuration in which the second base 22 side of the bearing 33 is thicker can also be realized by tapering instead of providing the step 33a.

20 first base 22 second base 32a, 32b through hole 33 bearing 33a stepped portion

Claims (4)

One end of the filament is provided with a cylindrical head having a locking pawl on the inner wall, and the other end is provided with a coupling body that is inserted into the cylinder of the head and engages with the locking pawl. A filament-like connecting body mounting device for forming a filament into a ring by fitting it to the head of the body, wherein a trigger lever is provided in front of the grip of a pair of left and right hollow device bodies , and at least the trigger A mounting device for a filament-like connected body comprising a parallel link mechanism actuated by actuation of a lever, and a head-carrying arm for the filament-like connected body actuated by the parallel link mechanism, wherein the support structure for the head-carrying arm A mounting device for a filament-like connected body, characterized in that bearings fitted into through-holes formed in left and right bases in the main body of the device are used as support shafts, and the left and right bases support the head conveying arm. 2. A mounting device for a filament-like connecting body according to claim 1, wherein said bearing is a cylindrical body made of synthetic resin. 3. The mounting device for filament-like connecting bodies according to claim 2, wherein the synthetic resin is polyacetal (POM). 4. The mounting device for a filament-like connected body according to claim 2, wherein one side of the inner wall of the through-hole of the bearing is thick.

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