JPH0540948Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention enables needles of different widths to be loaded in a sealing machine that uses U-shaped needles to join together overlapping parts of cardboard boxes, etc. This relates to a needle holder.

[Conventional technology]

The sealing machine used to insert the legs of a U-shaped needle into the cardboard and bend the legs on the back side of the cardboard to perform the binding is shown in Figures 1 and 2. Continuous needle with multiple needles A connected
A head 2 is attached to the tip of the holder 1 that stores A', and a handle 3 and a shutter 4 that descends when the handle 3 is pressed down are attached to the head 2, and when the handle 3 is pressed down, the head 2 is attached to the bottom of the shutter. A pair of anvils 5, 5 are assembled into the holder 1, and a pressing means 6 for pushing the needle A toward the head 2 is attached to the rear end side of the holder 1.
When pressed down, the most advanced needle that contacts the needle catch plate 7 attached to the tip of the holder 1 is pushed down by the shutter, and both legs B of the needle A penetrate the cardboard, and at the same time both anvils 5, 5 are pushed down. By penetrating the cardboard, receiving the tip of the leg B, and bending the leg B on the back side of the cardboard, the needle A securely seals the overlapping portion of the cardboard.

By the way, the needles used for sealing are available in needles with long legs B and needles with short legs B in order to accommodate changes in the thickness of the cardboard.

In FIG. 7, the length L of the leg body B includes, for example, a long group of 18 mm and 19 mm, and a short group of 15 mm and 16 mm.

The former long group is formed by bending strips of equal width into a U-shape, so there is a difference in width W, and the needles with short legs are 2 mm wider in width W than the needles with long legs.

The needles in the latter short group are also manufactured under the same conditions, and the relationship between the length L and the width W of the legs is the same.

Note that the conditions for the width W in both the long and short groups are set to be the same, so in the needles with the above-mentioned exemplary dimensions, there are four types of lengths L of the legs B as a whole, but regarding the width, For example, there are two types: 36mm wide needle and 34mm narrow needle.

As shown in FIG. 5, the sealing machine is provided with a recessed receiving part 8 on the inner edge of the tip of the anvils 5, 5 on both sides to receive the tip of the leg B, so that the leg B of the needle A that has been pushed down is The leg body B is received by the receiving part 8 and bent by the pressing force of the needle A and the rotation of the anvils 5, 5.

Therefore, when the needle A is pressed down by the shutter 4 and the anvils 5 are rotated, the tip of the leg B is moved to the receiving part 8.
The timing must be adjusted according to the length L of the leg B so that the leg body B comes into contact with and engages with the leg body B.

In other words, if a needle with short legs is used in a sealing machine set up for needles with long legs, the amount of descent of the needle will be slower than the amount of rotation of the anvil, and the receiving part will be inward when the tip of the leg reaches the anvil. It will pass through, making it impossible to bend the legs.

Also, if a long leg needle is used in a sealing machine set up for a short leg needle, the opposite situation will occur.

For this reason, conventional sealing machines either use a dedicated one for each specific needle, or they have a device attached to the head that adjusts the amount of descent of the shutter so that needles with different leg lengths can be used. I have to.

However, in the case of the former method, which is dedicated to specific needles, it is necessary to prepare a sealing machine for each type of needle, which results in high equipment costs and troublesome management.

In addition, although the latter adjustment method can eliminate the above-mentioned inconveniences, it requires a complicated structure of the adjustment device, increases manufacturing costs, and has the inconvenience of having to perform adjustment work every time the needle changes. There is.

In order to solve this problem, the needle storage holder can be loaded with needles of different widths, and as shown in FIG. It has been proposed that a single sealing machine can be used for needles of different widths by arranging receiving parts 8a for bending the needles.

The structure of the conventional holder 1 used in the above-mentioned dual-purpose sealing machine is, as shown in FIG. The cross section of the inner guide 10 is formed into an upwardly U-shaped cross section that accommodates the width circumscribed by the narrow needle and the height of the needle of the longest leg.

[The problem that the idea aims to solve]

By the way, the conventional holder 1 as described above is
There is a problem in that the needle is not guided smoothly.

That is, since the needle A is formed by bending a metal band plate into a U-shape, there is a dimensional error in the width W. Therefore, the outer guide 9 is formed wider than the wide needle by the amount of the error, The inner guide 10 is formed to be narrower than the narrow needle by an amount corresponding to the error, and as a result, the needle A loaded in the holder 1 will wobble in the width direction, and this will cause stiffness in guiding the needle A. occurs, which impedes the forward movement of needle A.

Furthermore, since the needle A is movable in the width direction, the centers of the wide needle and the narrow needle do not coincide with each other during needle striking, resulting in a change in the amount of bending of both legs during needle striking.

Therefore, this idea was developed to create a sealing machine in which the needle is guided by only one leg, which allows the needle to be guided forward smoothly, and which allows the needle to be struck with the centers of the wide and narrow needles aligned. Our goal is to provide a needle holder for this purpose.

[Means to solve the problem]

In order to solve the above problems, this invention provides a middle rail along the longitudinal direction on one side of the holder, and connects one leg of the needle to the holder between the middle rail and one side wall of the holder. A needle guide plate is provided on the needle receiver plate attached to the tip of the holder to align the widthwise center of the needle pressed against the needle receiver plate with the center of the holder. A configuration in which a mating inclined surface is provided is adopted.

[Effect]

Since one leg of the needle is guided through the passage formed between one side wall of the holder and the middle rail, the needle can be guided smoothly without rattling or twisting within the holder.

Further, due to the inclined surface provided on the needle receiver plate, the centers of both the wide and narrow needles coincide with the center of the holder, and the legs on both sides can be bent uniformly during needle striking.

〔Example〕

Embodiments of this invention will be described below with reference to FIGS. 1 to 12 of the accompanying drawings. The basic structure of the head portion of the sealing machine is as shown in FIGS. 1 and 2, and therefore the structure of the needle holder will be described in detail.

As shown in FIGS. 4 and 6, the holder 1 in which the needle A is loaded has a middle rail 22 inside the outer guide 21
is fixed, a pressing member 23 is arranged in the longitudinal direction directly above the outer guide 21, and a pressing means 6 for pushing the needle A loaded in the outer guide 21 forward is connected to the leg end of the outer guide 21. .

As shown in FIGS. 4 and 6, the outer guide 21 is
The middle rail 22 has a bottom plate 24 which is narrower than the inner width of the narrow needle.
and a vertical plate 25 that stands up on one side edge of this bottom plate 24 and has a height lower than the shortest leg needle, forming an L-shape, and the bottom plate 24 is overlapped and fixed to the bottom surface 21a of the outer guide 21. There is.

The middle rail 22 has a vertical plate 25 close to one side wall 21b of the outer rail 21, and the one side wall 21b
A gap is provided between the opposite surfaces of the vertical plate 25 so that the plate thickness of the leg B of the needle A just fits, and one leg B of the needle A is guided along the longitudinal direction of the holder 1 by this gap. A passage 26 is formed.

As mentioned above, one side wall 21 of the outer guide 21
needle A in the passage 26 formed between the center rail 22 and the
When one leg body B is guided, wide legs, narrow legs, long legs,
Regardless of which needle A has the short legs, when loaded into the outer guide 21, it will be guided toward one side wall 21b.

When one leg B is guided in the passage 26 in this manner, the needle A of any width can move smoothly within the holder 1 without wobbling in the width direction.

Further, as shown in FIG. 8, the center of the wide needle A ₁ in the width direction coincides with the holder 1 due to the guide to the one leg B by the passage 26, while the center of the wide needle A 1 coincides with the holder 1 as shown in FIG.
As shown in the figure, the center of the narrow needle A ₂ in the width direction is offset from the center of the holder 21 .

The needle receiving plate 7 attached to the tip of the holder 1 is formed into a U-shape in plan to fit onto the outer guide 21, and as shown in FIG. 27,
27 and the front wall 28, a gap 2 is created between the tip of the bottom wall 21a of the outer guide 21 and the front wall 28, as shown in FIG.
9 is formed.

The leading edge of the continuous needle A' loaded in the holder 1 is pressed against the front wall 28 of the needle receiver plate 7, but the widthwise center of the narrow needle _A2 is pressed against the front wall 28 of the needle receiver plate 7, as shown in FIG. It is off-center from the center of the holder 1, so when firing the needle, the shutter 4
It is necessary to align the leading edge needle that has been pushed and separated with the center of the holder 1.

For this reason, as shown in Figs. 6 and 11, the needle receiving plate 7 has a front wall 28 at both sides thereof.
A centering inclined surface 3 that moves the narrow needle A ₂ in the width direction so that its widthwise center coincides with the center of the holder 1.
0, 30 are provided.

These inclined surfaces 30, 30 are formed on both sides of the front wall 28 of the needle receiver plate 7, as shown in FIG.
It is formed by bending the front wall 28 so that it is inclined forward and inward to the position where the legs B, B of A ₁ contact each other.

Therefore, in the case of the wide needle _A1 , as shown in FIG.
The contact conditions of the legs B, B against the inclined surfaces 30, 30 are equal on the left and right, and the wide needle _A1 does not move in the width direction. Therefore, the needle is inserted with its widthwise center coinciding with the center of the holder 1.

On the other hand, in the case of the narrow needle _A2 , as shown in FIG. The condition of contact with the inclined surfaces 30, 30 on both sides of B, B changes on the left and right sides, and the most advanced needle A, which is separated and independent from the continuous needle during needle striking, is pressed against the needle receiver plate 7 because of the pressing force applied from the rear. Movement in the width direction occurs due to the action of the inclined surfaces 30, 30 so that the pressure conditions of the legs B, B are equal on the left and right sides,
As shown in FIG. 12, the center of the narrow needle _A2 in the width direction coincides with the center of the holder 1.

In this way, even if the width W of the needle A loaded in the holder 1 is different, the center of the width direction of the needle is the center of the holder 1 when the needle is struck due to the action of the inclined surfaces 30 and 30 provided on the needle receiver plate 7. This results in a needle striking state in which both legs are bent into the same shape.

The aforementioned push-down member 23 is formed of a leaf spring, has its rear end fixed to the upper part of the outer guide 21, and is adapted to push down the continuous needle A' located at the front of the holder 1, as shown in FIG. It's summery.

Therefore, the continuous needle A', which moves forward every time the shutter 4 strikes a needle, has its needle tip aligned with the bottom surface 2 of the outer guide 21.
1a will be slid.

As shown in FIGS. 1, 2, and 6, the pressing means 6 includes a long shaft rod 3 attached to the hanging rear wall of a downward U-shaped pressing tool 31 that fits inside the outer guide 21.
A spring 34 is compressed between the pusher 31 and a substantially V-shaped connector 33 which is passed through the shaft rod 32 and is attached to the rear end of the shaft rod 32 so as to be able to engage with and detach from the rear end hole of the outer guide 21. The push tool 31 is formed with a recessed step 35 provided in the upper part thereof to allow the push-down member 23 to escape.

The needle holder of this invention has the above-mentioned configuration, in which the continuous needle A' to be used is inserted from the rear end of the holder 1 from which the pressing means 6 has been removed, and then the pusher 31 of the pressing means 6 is inserted into the holder. 1, compress the spring 34, and connect the rear end connector 33 to the outer guide 2.
If it is hooked to the rear end of 1, it will be in the loaded state where the continuous needle A' is pressed forward, as shown in Figures 1 and 2.
One leg B of the needle A is guided through the passage 26, and the most distal needle abuts against the needle receiver plate 7, while the continuous needle A' is pressed from above by the pressing member 23.

If you perform needle driving work in such conditions,
Shutter 4 pushes down the most advanced needle A.

The needle tip of continuous needle A' is on the bottom surface 21 of the outer guide 21.
Since the continuous needle A' is supported by point A and is pressed from above, when the most advanced needle A is pressed by the shutter 4 and separated, the continuous needle A' does not tilt downward. A descends vertically,
No more bending and getting stuck in the middle.

In addition, when the wide needle A ₁ is loaded in the holder 1, as shown in FIG. coincides with the center of

Furthermore, when a narrow needle A ₂ is loaded, as shown in FIGS. 11 and 12, the most advanced needle automatically moves in the width direction when striking the needle due to the action of the sloped surfaces 30, 30 on both sides of the needle guard plate 7. The needle is struck with the center of the width direction aligned with the center of the holder 1.

〔effect〕

As described above, according to this invention, an inner rail is provided inside the outer guide, which has a cross-sectional shape in which a wide needle and a long-legged needle can fit, and which guides one leg of the needle with one side wall of the guide. The needle to be moved forward in the outer guide can be guided by only one leg, and therefore the leg does not wobble or twist, and the needle can be smoothly moved forward.

In addition, the sloping surface provided on the needle guard plate aligns the widthwise center of the most extreme end with the center of the outer guide, so even if needles have different widths,
Needles can be struck with the center in the width direction aligned with the outer guide, and even needles with different width dimensions can be struck accurately.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a sealing machine using a needle holder according to this invention, Fig. 2 is a one-minute cutaway front view of the same as above,
Figure 3 is an enlarged longitudinal sectional front view of the main parts of the same as above, Figure 4
The figure is a vertical sectional side view taken along the arrow - in Figure 3.
The figures are a side view showing the anvil part in the same as above, Fig. 6 is an exploded front view of the needle holder, Fig. 7 is a front view of the needle, Fig. 8 is a longitudinal sectional view showing the relationship between the needle holder and the wide needle, and Fig. 9 The figure is a cross-sectional view of the same, Figure 10 is a longitudinal cross-sectional view showing the relationship between the needle holder and the narrow needle, Figures 11 and 12 are cross-sectional views of the same, and Figure 13 is a cross-sectional view of the conventional needle holder. FIG. 1...Holder, 2...Head, 3...Handle, 4...Shutter, 5...Anvil, 6...
Pressing means, 7...needle receiver plate, 21...outer guide, 22...middle rail, 23...pushing member, 2
6... Passage, A... Needle, A ₁ ... Wide needle, A ₂ ...
Narrow needle.

Claims (1)

[Scope of utility model registration request] The needle is loaded into a holder that can accommodate U-shaped needles of different widths, and when the handle is pushed down, the shutter is lowered, and at the same time, a pair of anvils rotate close to each other directly below the shutter, and both sides of the needle pressed down by the shutter are In a sealing machine in which the legs are supported by an anvil and the legs on both sides are bent by pressing down and rotating the anvil, a middle rail is provided along the longitudinal direction on one side of the holder, and this middle rail and A passage is formed between one side wall of the holder to guide one leg of the needle along the longitudinal direction of the holder, and the needle pressed against the needle receiver plate is attached to the tip of the holder. A needle holder for a sealing machine, characterized in that a centering inclined surface is provided for aligning the widthwise center of the needle with the center of the holder.