JPH0620675A - Bag making device for separator - Google Patents

Abstract

PURPOSE:To provide a bag making device for separator in which the displacement of a separator to an electrode plate is prevented, and both lateral ends of the separator can be precisely pressed or fused to each other. CONSTITUTION:A separator 3 is folded double nearly in a V-shape, and an electrode plate 1 is put between them. A bag making device of separator is formed of press rollers 4 consisting of a pair of rollers for passing, between them, the separator 3 having a plurality of parallel ribs 2 along the longitudinal direction on the inside and a plurality of low projections 6 in conformation to the ribs 2 on the outside, and pressing the separator 3 onto the electrode plate 1; and a device 5 for fusing or mechanically pressing both lateral ends of the two-folded separator 3 having the electrode plate 1 put between to each other. In determined positions of the rollers 4, a plurality of recessed parts 7 conformed to the low projections 6 on the outside of the separator 3 are provided, and the projections 6 are passed in the recessed parts 7, whereby the position of the separator 3 is corrected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag forming device for a lead storage battery separator.

[0002]

2. Description of the Related Art In a lead storage battery, an electrode plate, in particular a positive electrode plate, in which a cast grid or expanded grid is filled with a predetermined active material paste, is housed in a bag-shaped separator made of microporous synthetic resin. By protecting the positive and negative plates from each other in the battery, the positive and negative plates are prevented from being electrically short-circuited due to the active material falling off.

A conventional separator bagging device will now be described with reference to FIG. As shown in FIG. 2, the conventional separator bagging device has a plurality of ribs that are folded in two in a substantially V shape, sandwich the electrode plate 1 between them, and are parallel to the inside along the length direction. 2 is provided with the separator 3,
It is composed of a press roller 4 consisting of a pair of rollers that pass through the space and press against the electrode plate 1, and a device 5 that mechanically crimps the left and right ends of the separator 3 with the electrode plate 1 sandwiched inside.

[0004] Then, the V plate having the electrode plate 1 sandwiched inside is approximately V
By passing the letter-shaped separator 3 between the pair of press rollers, the separator 3 by the subsequent pressure bonding device 5 is inserted.
It facilitates mechanical crimping of both left and right ends.

[0005]

However, when the above-described separator bagging apparatus is used to bag the separators at high speed, the following problems occur. That is,
When the electrode plate is quickly sandwiched between the V-shaped separators, the separator may be misaligned with respect to the electrode plate because the separator is made of a relatively soft material such as polyethylene. .

Since the mechanically pressure-bonded portion of the separator is a small portion around the electrode plate sandwiched inside, if the separator is displaced with respect to the electrode plate as described above, The left and right ends of the separator cannot be crimped accurately. Further, when the displacement of the separator is large, the left and right ends of the separator may not be crimped at all, or the separator may be crimped together with the electrode plate, resulting in frequent manufacturing defects.

The present invention is intended to solve such a problem, and when the separator is formed into a bag at a high speed, the separator misaligned with respect to the electrode plate is returned to the correct position and left and right ends of the separator are separated. The present invention provides a separator bagging device capable of accurately crimping.

[0008]

In order to solve the above-mentioned problems, the separator bag forming apparatus of the present invention has a substantially V shape.
Fold it in between and sandwich the electrode plate in between, and inside it a plurality of parallel ribs along the length direction, and on the outside a separator provided with a plurality of short ribs corresponding to the ribs. , A press roller that passes between a pair of rollers to press the separator against the electrode plate, and a device that welds or mechanically press-bonds the left and right ends of the separator sandwiching the electrode plate between the pair of rollers. A plurality of recesses corresponding to the short ridges on the outside of the separator are provided at predetermined positions of the roller, and the position of the separator is corrected by passing the ridges into the recesses.

Here, the short ridge on the outside of the separator is formed by the outward protrusion of the rib that is in contact with the electrode plate.

[0010]

In the separator bagging apparatus of the present invention, when a two-fold separator having an electrode plate sandwiched inside is passed between the press rollers, the rib contacting the electrode plate protrudes to the outside of the separator. A short ridge portion formed on the outer side passes through a concave portion provided at a predetermined position of the press roller.

When the separator is misaligned with respect to the electrode plate, the ridge portion formed on the outside of the separator passes along the inside of the recess to correct the misalignment of the separator. By doing so, the separator can be returned to the correct position, and the displacement of the left and right ends of the separator can be prevented.

Therefore, even when the separator is formed into a bag at a high speed, the left and right ends of the separator can be accurately pressure-bonded without being displaced, and a good bag-like separator having no positional deviation between the left and right ends can be obtained.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a separator bag forming apparatus of the present invention. As shown in FIG. 1, in the separator bagging apparatus of the present invention, the ribs 2 that are in contact with the electrode plates are formed outside the separator at predetermined positions of the pair of press rollers 4. A recess 7 corresponding to the short ridge 6 is provided. Then, when the substantially V-shaped separator 3 having the electrode plate 1 sandwiched inside is pressed against the electrode plate through the pair of press rollers 4, the short ridges 6 on the outer side of the separator 3 are formed into the recesses. It is introduced into 7 and passed along it. As a result, when the separator 3 is misaligned, the misalignment can be corrected and the separator can be returned to the correct position, and the misalignment of the left and right ends of the separator can be prevented.

Next, by using the present invention and the conventional separator bagging apparatus, 5000 predetermined bag-shaped separators were produced, and the displacement of the crimped portions at the left and right ends of each bag-shaped separator was measured. . Here, the separator was made of a microporous film containing polyethylene as a main component.

As a result of this, the results of using the apparatus of the present invention are shown in FIG. 3, and the results of using the conventional apparatus are shown in FIG. As shown in FIG. 4, in the bag-shaped separator manufactured by the conventional apparatus, the positional displacement at the crimping portion was as large as 3.0 mm, and there was a defective product in which the electrode plate was crimped together with the separator. However, in the case of the bag-shaped separator manufactured by the apparatus of the present invention, the displacement in the pressure-bonded portion was 0.5 mm at the maximum, and it was possible to manufacture a good bag-shaped separator.

In this embodiment, the left and right ends of the separator are mechanically pressure bonded to produce a bag-shaped separator.
Similar effects were obtained when the bag-shaped separator was produced by heat welding.

[0018]

As described above, the separator bagging apparatus according to the present invention corresponds to the short ridges formed on the outside of the substantially V-shaped separator at the predetermined positions of the pair of press rollers. Since the recess is provided, if the separator is misaligned with respect to the electrode plate, the misalignment of the separator can be returned to the correct position by passing the protrusion in the recess, and It is possible to prevent misalignment of both ends.

Therefore, the left and right ends of the separator can be accurately pressure-bonded to each other, and a good bag-shaped separator with almost no displacement can be manufactured.

[Brief description of drawings]

FIG. 1 is a diagram showing a separator bag forming apparatus of the present invention.

FIG. 2 is a view showing a conventional separator bagging device.

FIG. 3 is a diagram showing variations in displacement in the crimping portion of the bag-shaped separator manufactured by the bagging apparatus of the present invention.

FIG. 4 is a diagram showing variations in displacement in a crimping portion of a bag-shaped separator manufactured by a conventional bagging device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrode plate 2 Rib 3 Substantially V-shaped separator 4 Press roller 5 Device for crimping the left and right ends of the separator 6 Low ridge 7 Recess

Claims (2)

[Claims] 1. A V-shape is folded in two and a pole plate is sandwiched between them, and a plurality of parallel ribs along the lengthwise direction are provided inside, and a spine corresponding to the ribs is provided outside. A press roller consisting of a pair of rollers that pass a separator provided with a plurality of low ridges, and a device for welding or mechanically crimping the left and right ends of the separator sandwiching the electrode plate, At a predetermined position of the pair of rollers, a plurality of recesses corresponding to the short ridges on the outside of the separator are provided, and a separator that corrects the position of the separator by passing the ridges into the recesses is provided. Bagging device. 2. The short ridges on the outside of the separator are
The separator bagging device according to claim 1, wherein the separator bag is formed by an outward protrusion of a rib abutting the electrode plate.