JP2001301066A - Method for cutting seal member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for cutting a seal member which can improve the functions of a cut seal and its sticking work properties. SOLUTION: The method has tension application process in which prescribed tension is applied to the seal member 100 in the feeding direction of the member 100; a cutting process in which the seal member is cut over the whole width in the width wise direction crossing at right angles to the feeding direction with release paper 3 left, while the tension is applied to the member 100; and a lifting process in which the tension is lifted, and a cut surface with a given inclination to the thickness direction is formed in the member 100.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting a sealing member in which a double-sided tape with release paper is attached to one surface of a sponge-like soft foam sealing material such as a malt plane, and to a cutting surface of a cutting sheet. The present invention relates to a method of cutting a seal member that performs half-cut cutting so as to form a constant inclination in a vertical direction.

[0002]

2. Description of the Related Art Conventionally, a seal (= cut seal) with a double-sided tape of a sponge-like soft foam such as malt plain has been widely used as a sealing material or a cushioning material.
Particularly in the field of toner cartridges and the like, the shape of the cut seal and the positional accuracy of sticking to a work (cartridge container, etc.) are strict in order to prevent air leakage and prevent interference with peripheral components arranged in a small space. Required. For example, (1) the cutting seal is placed beside the convex wall (close to the wall).
When the seal is obtained by minimizing the clearance between the wall and the cut seal side surface (cut surface), (2) When rotating parts that must not interfere with the cut seal are arranged close to each other, Etc.

Conventionally, in order to satisfy the functional objectives / restrictions as described in (1) and (2) above, it is necessary to (a) improve the dimensional accuracy of the cut seal and (b) cut the seal against the work. Is as accurate as possible (the position of the double-sided tape on the underside of the cutting seal) is as accurate as possible.
(About 3 to 0.5 mm).

Conventionally, as measures for improving the size and shape of the cutting seal, the dimensional accuracy of the cutting blade has been made constant, and the cutting of the seal has been performed.
It goes without saying that the dimensional tolerance is improved. In addition to this, particularly when cutting a flexible foam seal member, as described in the column of "Prior Art" in JP-A-7-1396 and JP-A-8-11098, Since the center part of the cut surface has a knob-shaped shape in which an arc is dented inward, it is necessary to minimize this effect. In order to reduce the degree of the dent (knob-shaped shape) of the cut surface, in the above two prior arts, a "disposable blade" or a "disposable blade + elastic body" is provided on the outer periphery of the cutting blade to provide a meat for sealing. A method has been proposed in which escape is prevented or controlled so that the cut surface of the seal approaches a vertical or tapered shape.

[0005] Regarding the improvement of the accuracy of the position of the cut seal to be applied to the work, the flexible foam seal has no stiffness in the material itself. Therefore, when the accuracy of the position of the cut seal to the work is severe, automation is difficult. It is carefully attached to the work while checking the position one by one using tweezers or the like. In the case of applying the cutting seal to the wall of the work as in the above (1), the double-sided tape on the lower surface of the cutting seal is applied with a slight clearance so as not to cover the wall. In the case of (2), the cutting is performed. After attaching the seal, a very time-consuming and difficult operation such as checking for interference between the upper surface of the seal and peripheral components is performed.

[0006]

However, the above conventional example has the following problems.

[0007] JP-A-7-1396, JP-A-8-1
In the case of the technique described in the column of “Prior art” in JP 1098, dents in the cut surface of the seal (knob shape)
And the degree (amount) of the dent is not constant, and the cut shape is not stable. In order to prevent dents on the cut surface of the seal, Japanese Patent Laid-Open Nos.
A certain effect can be expected by the proposal of the publication. However, it is basically a method for making the seal cut surface close to a vertical or tapered shape.

[0008] Even if a cut seal having a vertical cut surface, which is the best condition on a desk, can be obtained by the two proposed methods, it is difficult to achieve the above-mentioned conditions (1) and (2). Although the effect is somewhat high, it is not so much as to significantly improve the practical effect such as improvement of the sealing function (sealability / prevention of interference = stable position of the seal upper surface) and reduction of the sticking operation.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problem, and an object of the present invention is to cut a seal member capable of improving the function of a cutting seal and improving the workability of sticking. Is to provide a way.

[0010]

Means for Solving the Problems To solve the above-mentioned problems,
In order to achieve the object, a method for cutting a seal member according to the present invention includes a sheet material made of a flexible foam, a double-sided tape attached to one surface of the sheet material, and a release paper covering the surface of the double-sided tape. Having a sealing member formed in a continuous tape shape, in the cutting method of the sealing member half-cut leaving the release paper, the sealing member,
A tension applying step of applying a predetermined tension in the feed direction of the seal member, and in a state where the predetermined tension is applied to the seal member, the release member is moved over the entire width in the width direction orthogonal to the feed direction. A cutting step of leaving the cutting, and a releasing step of releasing the predetermined tension after the completion of the cutting in the cutting step, wherein the sealing member has a constant inclination in a thickness direction thereof. It is characterized by forming a surface.

In the method of cutting a seal member according to the present invention, in the cutting step, the seal member is cut into a cut seal having a predetermined shape by a full-form cutting blade, and a portion other than the cut seal is cut by the above-mentioned method. The sealing member is cut in a direction substantially perpendicular to the feed direction over the entire width in the width direction of the seal member.

Further, the method for cutting a seal member according to the present invention further comprises, before the cutting step, a pressing step of pressing the seal members on both sides in the width direction of the cut seal in the thickness direction of the seal member. It is characterized by doing.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described.

First, an outline of an embodiment will be described.

In the present embodiment, (1) When the cut seal is attached to the side (close to the wall) of the convex wall and the gap between this wall and the cut seal side surface (cut surface) is minimized to obtain the airtightness, (2) )
When rotating parts that should not interfere with the cutting seal are arranged close to each other,
In (1), the seal cut surface required to be tightly sealed with the wall is a specific cut surface, and in (2), at least a specific area around the cut seal sticking position is selected to prevent interference with peripheral components. In consideration of the fact that there is usually a space on one side, it is proposed to make a specific seal cut surface into an obliquely inclined shape.

That is, as shown in FIGS. 14 and 15,
The cut surface of the seal has a constant inclination in the thickness direction, and the cut seal 4 is attached in the direction A on the wall side in the case of (1), and as the space side not interfering in the case of (2), thereby providing a sealing function. It is possible to achieve the improvement of the performance and the reduction of the burden of the sticking operation of the seal (the improvement of the functionality enables the sticking with a somewhat rough accuracy). Further, the shape of the cut surface having a constant inclination is one of A and B which are opposed to each other in a normal sealing function.
A pair of cut surfaces may be used, and the other cut surface portions C and D are desirably cut perpendicularly to the position of the applied double-sided tape in order to stabilize the position of the cut seal upper surface as shown in FIG.

In this embodiment, in order to achieve the above object, a method of cutting the seal cut surfaces A and B such that the seal cut surfaces A and B are regulated to have a constant inclined shape in the thickness direction, and a cut surface portion C other than the inclined cut surface. , D vertically.

Specifically, a sheet member in which a double-sided tape with release paper is attached to one surface of a flexible foam sealing material,
In the seal cutting method of half-cutting only the seal material and the double-sided tape adhesive layer into a predetermined shape while leaving the release paper,
A constant tension is applied in the feeding direction of the sheet member, and the cutting blade is closed at the both ends in the width direction with a closed full-form cutting blade having the same shape as the seal cutting shape to be half-cut and a portion other than the cutting seal of the sheet member. The cutting seal is formed by a dummy blade that cuts in a continuous linear shape (a line perpendicular to the feeding direction of the sheet member) so that the cutting surface of the cutting seal is cut in a constant inclination shape in the thickness direction. Also, at least the cut seal outer parts at both ends in the width direction of the sheet member,
Cutting is performed by pressing in the thickness direction of the sheet member.

The present embodiment relates to a cutting method in which a flexible foam sheet is pitch-fed and cut every shot by a press device, wherein the cutting blade is a closed full-form cutting blade having the same shape as a seal cutting shape to be half-cut. By this, the seal cutting dimension is always constant.

By always applying a constant tension in the feed direction of the sheet member at the time of cutting, the shape of the cut seal and the pitch feed amount are stabilized.

The sheet state in the cutting method in which the sheet is fed at a pitch for each shot is such that one side (hereinafter referred to as a forward direction) in the sheet feeding direction is the portion cut so far, and the sheet member is cut by a cutting blade. Are inserted at every pitch, and the other side (hereinafter referred to as a rearward direction) is a portion that has not been cut yet.

By providing the cutting blade with a dummy blade for cutting a portion other than the cutting seal of the sheet member into a continuous line (a line perpendicular to the sheet feeding direction) connecting both ends in the width direction, The cut at each pitch is completely separated in the sheet width direction. In this state, when tension is applied to the sealing material portion from the rearward portion of the sheet member, only the sealing material on the rearward portion side is pulled in the tension direction and tilts obliquely in the sheet thickness direction. (Because it is completely separated in the sheet width direction by the blade, it is not affected by tension.) When the cutting blade descends and vertically cuts the inclined sheet portion from above, the cut seal surface becomes oblique in the tension direction (= feed direction) (the seal material is inclined by the tension). Since the cutting is performed vertically in this state, the tension is released after the cutting and the inclination of the seal material is returned to the vertical, so that the cut surface of the seal relatively tilts obliquely).

The structure in which the dummy blade is completely cut off in the sheet width direction plays a role of increasing the amount of inclination of the seal material due to the tension of the portion of the sheet member to be cut by the general cutting blade in the rearward direction. Since the amount of inclination depends on the tension, the inclination shape of the cut surface can be regulated to be constant by keeping the amount of tension constant.

Further, at least the outer portions of the cut sheet at both ends in the width direction of the sheet member are pressed and cut in the thickness direction of the sheet member, thereby reducing the deformation at the time of cutting the end surface in the sheet width direction, and corresponding to the sheet width direction. The shape of the cut surface can be made perpendicular to the thickness direction.

As described above, the cut surface of the seal is regulated to have a constant inclination in the sheet feeding direction, and the seal can be cut vertically in the sheet width direction.

The present embodiment will be specifically described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of an embodiment of a cutting apparatus for realizing the cutting method of the present invention.

FIG. 2 is a diagram showing a state when the sheet member 100 is cut.

The sheet member 100 has a structure in which a double-sided tape 2 and a release paper 3 are adhered to the lower surface of a malt plane material 1 of a soft foam. Pitch feeder 21
It is routed to zero. When the cutting blade 300 attached to the press device 200 descends to a predetermined position, the rectangular cutting seal 4 is half-cut from the sheet member 100.

After one shot is cut by the lowering / raising operation of the cutting blade 300, the sheet member 100 is fed one pitch to the right in the drawing (feed amount = amount slightly larger than the size of the cut seal in the feed direction). The operation of performing shot cutting is repeated.

The pitch feeding of the sheet member 100 is performed on the front side (the right side in the drawing) of the release sheet 3 of the sheet member 100 before the sheet feeding.
This is performed by sandwiching the sheet member 100 between the driving roller 201 and the driven roller 202 installed on the side, and rotating the driving roller 201 clockwise. The pitch feed amount is controlled by the pulse amount of a stepping motor (not shown) connected to the drive roller 201. Compression spring 2
Numeral 03 applies a compressive load in the thickness direction to the sheet member 100 in order to prevent the sheet member 100 from slipping between the two rollers and to stabilize the pitch feed amount.

The tension portion 211 has the same structure as the pitch feeding means, and the tension is added by the sealing material 1 of the sheet member 100 on the rear side (left side in the drawing) of the sheet feeding.
This is performed by sandwiching the sheet member 100 between the driving roller 204 and the driven roller 205 installed on the side, and rotating the driving roller 204 clockwise. The amount of tension is controlled by a torque value (voltage value) of a torque motor (not shown) connected to the drive roller 204. The compression spring 206 applies a compressive load in the thickness direction to the sheet member 100 in order to prevent the sheet member 100 from slipping between the two rollers and stabilize the torque value.

At the cutting portion of the sheet member 100 of the press device, a seal holder 400 is provided.
The outer peripheral portion in the width direction (both ends in the direction perpendicular to the pitch feed direction) other than the cut seal 4 of 00 is pressed in the sheet thickness direction. The seal presser 400 is driven up and down by a cylinder 401 (see FIG. 3), and the sheet member 100 performs “1 pitch feed operation → seal presser 400 lowering → press lowering (cutting) → press up → seal presser 400 raising → pitch feeder. The operation is repeated in the order of “operation”.

FIGS. 3 to 7 show the sheet member 1 of the press device.
It is a detailed view of the cut part of 00. The cutting blade 300 has two closed form cutting blades 3 having the same shape and dimensions as the cutting seal 4.
02 and a dummy blade 301 that cuts a portion other than the full-form cutting blade 302 into a continuous straight line (a line perpendicular to the feeding direction of the sheet member) connecting both ends in the width direction.

In the seal holder 400, a plurality of needle-like projections 402 for pressing the sheet material 1 at both ends in the width direction of the sheet member are fixed to the plate 403 in a row. The tip of the needle-shaped protrusion 402 is located at a position where the upper end of the cylinder 401 does not touch the upper surface of the sealing material 1 of the sheet member 100, and enters the thickness of the sealing material 1 at the lower end of the cylinder 401. 2 is set so as not to touch. The needle-like projections 402 allow the seal to be compressed in the thickness direction without significantly compressing the seal.
Even if the range of 0 is not increased, the effect of preventing the meat from escaping at the time of cutting the seal can be obtained, and the cut surface can be easily made vertical without using the method described in the conventional example. The seal holder 40
0 has a hole 402a for inserting the cutting blade 300 in the up-down direction as shown in FIG.

FIG. 7 is a view showing a state in which the sheet material is cut, in which the sheet travel direction (right side in the drawing) is a portion already cut by the cutting blade 300, and the rear side in the traveling direction (left side in the drawing) is to be cut. Part. In FIG. 7, the cutting seal 4 is a portion cut by the forming cutting blade 302, and the cutting line 102 is a line cut by the dummy blade 301.

FIG. 8 is a side view of FIG. A solid line 102 is a cut portion of the sheet member 100 at the dummy blade 301, and a dotted line 103 is a cut portion of the dummy cutting blade 302. As will be described later, the cut portions 102 and 103 are inclined in the pitch feed direction in the sheet thickness direction. Hereinafter, the cutting operation will be described in the order of FIGS.

<FIG. 9> Due to the above-described tension, the sealing material 1 on the left side from the cut portion 102a with the dummy blade is inclined leftward in the sheet thickness direction. Since the sealing material 1 is cut off over the entire width in the width direction of the sheet member 100 at the cutting portion 102a, the tension is applied to the cut portion 10a.
It does not act on the seal material portion on the right side of 2a.

<FIG. 10> The seal holder 400 is lowered by the cylinder 401, and the plurality of needle-like projections 402 penetrate into the seal material 1 to fix the sheet material portion to be cut. The tip of the needle-like projection 402 is set to have a dimensional relationship that does not touch the double-sided tape 2 to prevent the adhesive layer of the double-sided tape 2 from adhering.

<FIG. 11> The cutting blade 300 is lowered, and the cutting seal 4 is half-cut by the form cutting blade 302.
The sealing material other than the cutting seal 4 is cut in the width direction of the sheet member 100 by the dummy blade 301. The form cutting blade 302 is set to a cut amount such that a slight cut mark is made in the release paper 3, and the "seal material 1 + double-sided tape 2" is completely cut. The cutting amount of the dummy blade 301 is determined by the sealing material 1 when the tension described in FIG.
It is sufficient that the setting is such that the upper surface of the seal can be cut to such an extent as to incline.

<FIG. 12> After the cutting is completed, the cutting blade 300,
The seal holder 400 is raised.

<FIG. 13> The tension is released, and the sheet member 100 is shifted by one pitch by the pitch feed mechanism described above.
Is sent. When the tension is released, the cut seal portion (seal material portion) 4 returns to its original shape, and the cut surface is relatively inclined.

As described above, the cut surface A · S inclined obliquely to the traveling direction of the sheet member 100 as shown in FIGS.
B having a cross section perpendicular to the width direction of the sheet member.
Is obtained. In the method of the present embodiment, if a certain tension is applied, the inclination of the sealing material 1 becomes constant, and the shapes and directions of the cut surfaces A to D also become constant.

(Other Embodiments) (A) In the above-described embodiment, the shape-cutting blades 302 are two rectangles of the same shape. Absent. In the case of cutting a plurality of pieces, they do not all have to have the same shape. (B) In one embodiment, the dummy blade 301 is a full-form cutting blade 3
However, the dummy blade may be a single linear blade, and may be provided at a different location from the overall cutting blade. (C) The form cutting blade may be removed, and the sheet may be cut into strips by the dummy blade (the two surfaces of the cutting seal are the end surfaces in the sheet member width direction). (D) The seal retainer may be fixed to the cutting blade. Also,
The shape need not be a needle-like projection. In short, in consideration of the space on the apparatus and the required cutting shape accuracy, etc., if the effect of preventing the meat from escaping at the time of cutting the seal can be obtained, a known shape and method of a plate-like or blade-like seal holding member can be used. . (E) In one embodiment, a method using a tension roller is used as a method for applying tension to the seal material before cutting, but another method may be used. For example, as shown in FIG. 16, a seal holder 500 that moves up and down is provided on the side (left side) of the cutting blade in the sheet advancing direction. As a result, FIGS.
An effect similar to that of the embodiment such as 0 can be obtained. Further, in this case, the same effect as in the embodiment can be obtained even if the tension of the sheet feeding is rough to some extent (even if it varies) and the tension value is small.

As described above, according to the above embodiment, it is possible to cut the seal cut surface while restricting the cut surface to a fixed inclination shape, and to cut the other cut surfaces vertically. This effect is particularly large for a seal having a large thickness.
By attaching a cutting seal having a constant inclination shape of the cut surface to the work, an unprecedented effect as described below can be obtained. (A) The airtightness is improved by arranging the inclined cut surface A near the wall. That is, in the case of the conventional technique (1), the clearance between the wall and the seal cut surface is smaller than in the case where the seal cut surface is perpendicular to the thickness direction, and the sealing performance is improved. (B) By laying out the inclined cutting plane B in a direction where interference is not required, interference can be prevented. That is, in the case of the conventional technique (2), by performing the attachment in consideration of the inclination direction of the cut seal, interference with peripheral components can be prevented. (C) The cut surface CD perpendicular to the seal thickness direction can be easily obtained by the action of the seal press provided with the needle-like projections.
In a conventional seal holding structure in which a "blade blade" or a "blade blade + elastic body" is provided on the outer periphery of a cutting blade, the cut surface shape changes depending on the arrangement of the blade and the amount of compression of the seal. For this reason, it is necessary to adjust these conditions little by little by trial and error, but in the present embodiment, such labor is not required. (D) Due to the above-described effects, the cut seal (particularly the seal) after pasting to the work is compared with the conventional case where the cut seal shape (at best the cut surface is perpendicular to the thickness direction) is pasted to the work. The position of the upper surface portion) is stabilized, and the sealing function, that is, the sealing property and the interference prevention property are improved. In addition, thereby, the accuracy of sticking the cut seal can be made relatively rough, and the sticking workability is also improved.

[0046]

As described above, according to the present invention,
The function of the cutting seal can be improved,
The sticking workability can also be improved.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a cutting device according to an embodiment.

FIG. 2 is a configuration diagram of a sheet member.

FIG. 3 is a detailed view of a cut portion.

FIG. 4 is a view taken in the direction of arrows AA in FIG. 3;

FIG. 5 is a view taken in the direction of arrows CC in FIG. 3;

6 is a view taken in the direction of arrows BB in FIG. 3;

FIG. 7 is a cutaway view of a sheet member.

FIG. 8 is an explanatory diagram of a cutting operation of a sheet member.

FIG. 9 is an explanatory diagram of a cutting operation of a sheet member.

FIG. 10 is an explanatory diagram of a cutting operation of a sheet member.

FIG. 11 is an explanatory diagram of a cutting operation of a sheet member.

FIG. 12 is an explanatory diagram of a cutting operation of a sheet member.

FIG. 13 is an explanatory diagram of a cutting operation of a sheet member.

FIG. 14 is a diagram showing a shape of a cutting seal.

FIG. 15 is a view taken in the direction of the arrows D-D in FIG. 14;

FIG. 16 is a sheet member cutting operation diagram of another embodiment.

FIG. 17 is a sheet member cutting operation diagram of another embodiment.

FIG. 18 is a sheet member cutting operation diagram of another embodiment.

FIG. 19 is a sheet member cutting operation diagram of another embodiment.

FIG. 20 is a sheet member cutting operation diagram of another embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 sheet member 101 roll material 1 seal material 2 double-sided tape 3 release paper 4 cutting seal 200 press device 210 pitch feed unit 211 tension unit 201 drive roller 202 driven roller 203 compression spring 204 drive roller 205 driven roller 206 compression spring 300 cutting blade 301 Dummy blade 302 Form cutting blade 400 Seal holder 401 Cylinder 402 Needlelike projection 403 Plate 500 Seal holder

Claims (3)

[Claims] 1. A sheet material comprising a flexible foam, a double-sided tape attached to one side of the sheet material, and a release paper covering the surface of the double-sided tape, and formed into a continuous tape shape. In a method for cutting a seal member, the seal member being half-cut while leaving release paper, a tension applying step of applying a predetermined tension to the seal member in a feed direction of the seal member; and applying a predetermined tension to the seal member. A cutting step of cutting the seal member over the entire width in a width direction orthogonal to the feed direction while leaving the release paper; and releasing the predetermined tension after the cutting in the cutting step is completed. And forming a cut surface having a constant inclination in the thickness direction of the seal member on the seal member. . 2. In the cutting step, the seal member is cut into a cut seal having a predetermined shape by a full-form cutting blade, and a portion other than the cut seal is moved in the feed direction over the entire width of the seal member in the width direction. 2. The method for cutting a seal member according to claim 1, wherein the cutting is performed in a direction substantially orthogonal to the seal member. 3. The method according to claim 2, further comprising, before the cutting step, a pressing step of pressing portions of the seal member on both sides in the width direction of the cut seal in a thickness direction of the seal member. Cutting method of the sealing member.