WO2006112035A1

WO2006112035A1 - Plastic chuck with slider and bag body with the plastic chuck

Info

Publication number: WO2006112035A1
Application number: PCT/JP2005/008032
Authority: WO
Inventors: Juichi Kasai
Original assignee: Juichi Kasai
Priority date: 2005-03-31
Filing date: 2005-04-27
Publication date: 2006-10-26
Also published as: JP4675380B2; JPWO2006112035A1

Abstract

[PROBLEMS] To provide a slider capable of preventing it from falling off a chuck, a chuck base part from being damaged, and a damaged portion from being elongated or cut off even when contents are filled in a bag body excessively beyond its content volume and the slider and the chuck are forcibly closed to close the chuck. [MEANS FOR SOLVING PROBLEMS] This slider (S) comprises a pair of falling prevention projections (S5). The falling prevention projections are formed on an outer guide (S6) projectedly inward between an opening end (SOE) and a closing end (SCE) and, in the installed state of the slider across the top edges of the chuck, the chuck is held from the lower outside of the chuck. The outer guide of the slider comprises a pair of falling prevention auxiliary projections (AS) for limiting the degree of opening of the chuck near the opening end of the slider.

Description

Fine writing bag

Technical field

[0001] The present invention relates to a plastic chuck with a slider that can be used for packaging containers for foods, medicines, electronic parts and the like, has a high degree of airtightness, can be easily opened while keeping hermeticity, and the chuck. It relates to a bag body.

Background art

[0002] Bags with plastic chucks are often used as packaging materials for foods, medicines, electronic parts, and other articles. Especially, plastic chucks with sliders are widely used as packaging materials that can be easily opened and closed and resealed. It has been.

[0003] The slider of a conventional plastic chuck has a substantially inverted U-shaped vertical cross section, and consists of two outer guides, a top surface portion connecting these outer guides and an inner guide, and straddles the upper edge of the plastic chuck. Then, open the chuck with the inner guide and close the chuck with the outer guide. In order to prevent the slider from falling off the upper edge of the plastic chuck, the outer guide is generally provided with a drop-out preventing protrusion protruding inward at the lower end of the outer guide. For example, Patent Literature 1 (Patent No. 2938784), Patent Literature 2 (US Patent Specification No. 5007143), Patent Literature 3 (Patent No. 3026839), Patent Literature 4 (JP 2002-58509), Patent Document 5 (Japanese Patent Laid-Open No. 2001-130594), Patent Document 6 (WO 03/022697 A1), and the like are known.

[0004] When a chuck made of ribs and groove elements is widely protruded outward as disclosed in Patent Document 1 and Patent Document 2, the anti-dropping protrusion protruding inward is the chuck. Because I hangs a bow on the shoulder, the slider is difficult to come off!

[0005] In addition, as shown in Fig. 8 of Patent Document 4, the slider can also be used in a structure in which a part of the inner guide is always positioned below the closed chuck. Hard to come off

[0006] However, like the plastic chuck disclosed in the embodiment shown in FIG. 3 of Patent Document 3 and Patent Document 4, Patent Document 5 and Patent Document 6, male and female are placed on the surface of the plastic film. In the case where a chuck having a pair of claws is provided, the chuck does not protrude greatly to the outside, so that there is almost no shoulder portion of the chuck to which the drop-off preventing projection is hooked. Therefore, when the contents are excessively packed in the bag body with the plastic chuck attached, the slider is slid to try to close the chuck (ie, the contents are pushed into the bag). From the bag side, the reaction force is the force to open the chuck and the force to push up the slider. As a result, there is a problem that the slider slides off from the upper edge of the plastic chuck and is dropped no matter how many times the slider is slid. Even in the same state, sliding the slider in the direction to open the chuck will not cause the slider to come off.

Patent Document 1: Japanese Patent No. 2938784

Patent Document 2: US Patent No. 5007143

Patent Document 3: Japanese Patent No. 3026839

Patent Document 4: Japanese Patent Laid-Open No. 2002-58509

Patent Document 5: JP 2001-130594 A

Patent Document 6: WO 03/022697 A1

Disclosure of the invention

Problems to be solved by the invention

[0007] The present invention provides a slider that can be prevented from falling off the chuck when the chuck is closed by sliding the slider open end toward the closed end of the chuck. More specifically, the present invention relates to a bag with a chuck equipped with a slider, and compresses the contents by, for example, clogging the compressible contents more than the inner volume of the bag and forcibly closing the slider and the chuck. While closing the chuck, the purpose is to provide a slider that does not lose the chucking force or scratch the base of the chuck, and the damaged part will not stretch or break. To do. Furthermore, an object of the present invention is to provide a bag with a chuck provided with such a slider.

Means for solving the problem

In the present invention, for the above purpose, a sealing chuck comprising a pair of male and female claws is formed on the surface of a plastic film, and the chuck is opened and closed by a slider. In such a plastic chuck with a slider, the slider has a pair of drop-out preventing projections, and the drop-out preventing projections protrude inward between the open end and the closed end and are provided on the outer guide. When the slider is mounted straddling the upper edge of the chuck, the chuck is also sandwiched between the lower side and the outer side of the chuck, and the outer guide of the slider is a chuck near the slider opening end. This is achieved by a plastic chuck having a slider characterized by having a pair of drop-off prevention auxiliary protrusions for limiting the degree of opening of the slider.

[0009] Here, a flange is provided on each opening side of the male and female claws of the sealing chuck, and an end of each flange is connected or brought into contact with the sealing chuck in an engaged state. Alternatively, the sealing chuck is first opened by pushing a wedge-shaped opening plate into the inside of a closed plastic cylinder made up of the contacted flange portion, and after the closing chuck is opened, it is in a closed or contacted state. It may be a plastic chuck with a slider that opens the top of the flange.

More specifically, the drop-out prevention auxiliary protrusion cooperates with the drop-out prevention protrusion, and may be an aspect in which the opening end side end surface force of the slider extends in the closing end direction of the chuck, In some cases, the lower side force of the protrusion for preventing the dropout may be protruded downward, and both modes are performed simultaneously, and the outer guide of the slider is at the opening end side of the slider. The drop-out prevention auxiliary protrusions extending downward and the drop-out prevention protrusions may also have drop-out prevention auxiliary protrusions protruding downward.

In the present invention, it is preferable that a part of the drop-off preventing projection has a sharp end. In this case, it is preferable that the positions of the sharp end portions are points P and P where the opening end side end surface, the inner surface and the upper surface of the drop-off preventing projection intersect.

1 2

[0012] The opening end side surface force of the sliding prevention auxiliary protrusion force slider In the first aspect extending in the direction of the closing end of the chuck, when the slider is slid toward the closing end of the chuck by force, each of the chucks is prevented from falling off. The sharp edge that first contacts the chuck in the projection is point P, P, passes through point P, P, and is inside the chuck side of the drop-off prevention auxiliary projection.

1 2 1 2

Two tangential virtual planes PL in contact with each other, PL force ^ It is preferable that they intersect at an angle Θ within 0 degrees.

1 2

Good. Further, it passes through the points P and P and circumscribes the upper surface of each drop-off prevention auxiliary projection. Virtual plane PL force to perform Virtual parallel to the top surface of the slider at the points P and P

3 1 2

The detachment is performed so that at least one of the angles δ and δ made with respect to the plane PL is 5 degrees or more.

4 1 2

It is preferable to incline downward from the drop prevention protrusion toward the drop prevention auxiliary protrusion. Further, it is preferable that the drop-out prevention auxiliary protrusion protrudes toward the closing end of the chuck by at least 1 mm from the opening end side end face of the drop-off prevention protrusion.

[0013] In the second mode in which the drop-out prevention protrusion protrudes downward from the drop-off prevention protrusion, when the slider is slid toward the closing end of the chuck, The sharp edges that first contact the chuck at the protrusion are points P and P,

1 2 Two temporary contacts that pass through points P and P and are inscribed on the chuck side

1 2

It is preferable that the imaginary planes PL and PL intersect at an angle of | 8 within 30 degrees. Furthermore,

5 6

It is preferable that the drop-off prevention auxiliary protrusion protrudes downward by at least 2 mm or more from the upper outer surface on the opening end side of the drop-off prevention protrusion.

Furthermore, the present invention provides a bag body with a plastic chuck provided with the slider having the above-described structure.

The invention's effect

[0015] According to the present invention, the outer guide of the slider is provided with the drop-off prevention protrusion and the drop-off prevention auxiliary protrusion cooperating therewith, so that the drop-off prevention auxiliary protrusion force S the degree of opening of the chuck near the slider opening end. Limit. For this reason, when closing the chuck by sliding the slider open end toward the closing end of the chuck, the bag side force is weakened by the dropout prevention auxiliary projection even if the force to open the chuck acts on the slider. Therefore, the slider can be prevented from falling off the chuck. More specifically, according to the present invention, in a bag body with a chuck equipped with a slider, the contents having compressibility are packed more than the inner volume of the bag body, and the content is removed by forcibly closing the slider and the chuck. Even when the chuck is closed while being compressed, a slider can be provided in which the chucking force does not drop, the base of the chuck is not damaged, and the damaged part does not stretch or break. Furthermore, the present invention can provide a bag with a chuck having such a slider.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a slider according to the present invention. FIG. 2 is a perspective view showing a cross section of a part of one embodiment of a plastic bag body, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. 4 is a CC cross-sectional view of FIG.

In FIG. 1, F is a plastic film, and a sealing chuck CH having a pair of male and female claws is formed on the surface of this film. In this embodiment, the chuck CH includes female claws F1-1 and F1-2 of the chuck for sealing, male claws Ml-1 and Ml-2 of the chuck for sealing, a continuous pressing wall Rl, and a continuous pressing rib R2. In this embodiment, a flange FL is provided on the opening side of the chuck CH, and a second chuck CH2 including a female claw F2 and a male claw M2 is provided at the end of each flange FL.

[0018] The slider S has a substantially inverted U-shaped vertical cross section, and consists of two outer guides S6, a top surface S4 connecting these outer guides S6 and inner guides Sl, S2, S3, and the upper edge of the plastic chuck. Slide across. In this embodiment, the inner guide includes a wedge-shaped opening plate Sl, a lid S2, and an opening support S3.

[0019] In the above-mentioned plastic chuck with a slider, when the slider S is slid in the direction of the chuck closed end CE, the outer guide S6 provided on the slider closed end SCE (refer to the cross section of CC) shown in Fig. 4 The central chuck wall CH6 'and the upper inner wall S6 "are closed at the same time by the sealing chuck CH and the second chuck CH2.

On the contrary, when the slider S is slid in the direction of the chuck opening end OE, first, as shown in FIG. 4, it is composed of the sealing chuck CH, the second chuck CH2 and the flange portion FL which are in a state of being fitted together. The wedge-shaped opening plate S1 as shown in Fig. 3 is pushed into the closed plastic cylinder FP. First, the force for opening the cover chuck CH is maintained while the second chuck remains engaged. It is stored in the connection groove S7 and pressed by the lid S2, so it does not open.

[0021] The connection groove S7 for holding the sealing chuck CH after being opened in a closed state is substantially prevented from opening by making the width of the connection groove wider than the width of the opening column S3 immediately before the opening column S3. After releasing the function or removing the connecting groove itself, the second chuck CH2 is opened using the opening support S3 as shown in FIG. 2, thereby opening the bag body with the chuck. [0022] In this way, the slider S slides while mounted on the upper edge of the chuck between the open end OE and the closed end CE of the chuck, but the slider S is above the plastic chuck. In order to prevent the outer guide S6 from falling off the edge, a drop prevention protrusion S5 protruding inward is provided at the lower end of the outer guide S6. The drop-off prevention projection S5 protrudes inward between the open end SOE and the closed end SCE of the slider S and is provided on the outer guide S6, and the slider is mounted on the upper edge of the chuck. The chuck CH is held between the lower side and the outer force of the chuck CH.

[0023] A plastic chuck with a slider as described above is disclosed in WO 03/022697 A1.

[0024] Next, when the contents of the bag body are clarified by technical examination by the inventors, the open end SOE of the slider S is slid toward the closed end CE of the chuck CH. The relationship between the protrusion S5 for preventing the slider S from falling off when the chuck CH is closed and the opening state of the chuck portion of the plastic bag will be described.

[0025] In this specification, when the slider S is moved toward the closing end CE of the chuck, the first contact point with the film F of the chuck in each drop-off prevention protrusion S5 (usually a drop-off prevention protrusion) The point formed by the end surface, the inner surface, and the upper surface of the opening end side of S5) is referred to as P point, and at this P point, drop-off prevention projection S5 is in contact with the lower surface and outer surface of chuck part CH of the plastic bag. .

[0026] In the case where the point P of the drop-off preventing projection S5 does not have a sharp end, that is, for example, an end having an arc having a long radius or an obtuse slope, the slider opening end SOE is checked. When closing the chuck CH by sliding it toward the closing end CE, the contents in the bag push up the slider S upward (i.e., in the direction of dropping), and the drop prevention protrusion S5 Point P slides up the surface of the chuck. As a result, the reaction force of the chuck generates a stress in a direction to push open the fall prevention projection S5, and the fall prevention projection S5 is pushed open. For this reason, the angle α (see Fig. 5) that the film F, F with the male and female nails of the chuck CH makes in the direction perpendicular to the chuck between them does not change much, and the saddle point is the surface of the chuck CH. Slide further upward to push out the protrusion S5 for preventing dropout. By repeating this, the slider S also falls off in the chuck CH force. In order to prevent such inconvenience, as shown in FIG. 5, the point P of the protrusion S5 for preventing the slider S from falling is set to a sharp end, that is, the angle of the end is less than 90 °. As a result of earnest research by the present inventor, by making this point P a sharp end, when the slider S is pushed upward (in the direction of dropping) by the contents in the bag, it falls off. The sharp edge P of the prevention protrusion S5 bites into the film part at the base of the male and female claws to increase the sliding resistance, and the slider is further pushed up to approach the male and female claws more than a certain extent. When it reaches the point, the sharp edge P squeezes into the film at the base of the male and female claws and deforms the film so that it does not move upward (the direction of dropping) any more. It was possible that it was possible. In addition, the film at the base of the male and female claws as shown in Fig. 5? When the angle a made by F is approximately 40 degrees and the force is in the range of 80 degrees, the sharp edge P causes the film to undergo irreversible deformation including scratches on the film surface and film elongation, but when it reaches approximately 80 degrees. It is preferable to sharpen the end portion P of the drop-off preventing projection S5 to such an extent that the sharp end portion P deforms the film and does not move any further. By doing so, it was possible to prevent the slider from falling off even when the chuck was closed by sliding the slider toward the closed end of the chuck. In this way, by making the point P of the protrusion S5 for preventing the dropout of the slider S a sharp end, the dropout of the slider can be prevented without performing special processing such as a drop prevention rib on the films F and F or the chuck. This strategy can be applied to various types of chuck CH and slider S.

[0028] As described above, in this specification, when the slider S is moved toward the closing end CE of the chuck, the first contact with the film F of the chuck at each drop-off preventing projection S5 The point where the sharp end P is formed is the D- and cross-section of Fig. 2, as shown in Fig. 6 (A). Various modifications are possible, not limited to the P point formed on the upper surface. For example, as shown in FIG. 6C corresponding to the D-cross section of FIG. 2, a number of sharp end portions may be arranged vertically and longitudinally with respect to the drop-off preventing projection S5. Further, as shown in FIG. 6 (B) corresponding to the EE ′ cross section of FIG. 2, a number of sharp end portions may be arranged on the left and right and in the longitudinal direction of the drop-off preventing projection S5. Furthermore, as shown in FIG. 6 (D) corresponding to the A-section of FIG. 1, a number of sharp ends may be arranged in the vertical and horizontal directions of the drop-off prevention projection S5. In some cases These may be combined. As shown in Fig. 6 (A) to (D), many sharp edges are arranged not only in a straight line but also in various types such as arcs, ellipses, parabolas, cycloids, and clothoids. You can place it on the curve.

[0029] By the way, usually, the film with the chuck CH attached! / Is made of PP (polypropylene), PE (polyethylene), nylon, vinyl chloride, vinyl acetate or the like alone or laminated. And the slider S is made of plastic. The slider S is harder than the film F. For this reason, if the point P of the protrusion S5 for preventing the dropout of the slider S is set as a sharp end as described above, there is a drawback that the dropout of the slider can be prevented while the base portion of the chuck CH can be damaged. That is, when the pushing-up force acts on the slider S upward (that is, in the direction of dropping) due to the contents stored in the bag, the sharp end P of the drop-off preventing projection S5 This will damage the base film. Therefore, the present inventor diligently studied the influence of the content of the bag on the plastic bag and the slider S.

[0030] The effect of the content of the bag on the plastic bag and the slider S will be described with reference to FIG. Fig. 8 (A) shows the upper force when the bag is filled with the contents within the proper internal volume. Figure 8 (B) shows the upper force when the compressible contents are packed more than the appropriate internal volume of the bag. Furthermore, FIG. 8 (C) shows the film F along the drop-off prevention projection S5 at the point P formed by the opening end side end surface, the inner surface and the upper surface of the drop-off prevention projection S5 when the bag is overfilled. It is a cross section. In FIG. 8 (C), the cross section of the bag under the chuck CH and chuck CH is indicated by a virtual line (two-dot chain line).

[0031] As described above, in the chuck-equipped chuck CH bag having the above-described configuration, when the bag is filled with the contents within an appropriate internal volume, the opening CHO of the chuck CH is connected to the slider as shown in FIG. 8 (A). S can be opened and closed smoothly. On the other hand, when the compressible contents, such as clothing and foamed plastic, are packed more than the appropriate internal volume of the bag, the opening CHO of the chuck CH swells greatly as shown in Fig. 8 (B). In this state, if the chuck CH is closed while compressing the contents by forcibly moving the slider S toward the closing end CE direction (arrow direction) of the chuck CH (see Fig. 8 (C)), overfilling Depending on the degree of the problem, the chuck CH base may be scratched or the scratched part may be stretched or cut after approximately 3 to 4 opening / closing A point occurred.

[0032] When the inventor provided the drop-off preventing protrusion S5 having the sharp tip P as described above, the angle a (see FIG. 5) in the direction perpendicular to the chuck between the films F and F is 40 degrees. If the angle exceeds γ, the chuck may be damaged, so the angle γ (see Fig. 8 (Β)) in the direction parallel to the chuck between both films F and F of the chuck CH is set to 40 degrees or less to reduce the slider. When closing the chuck CH by sliding the open end SO E of S toward the closed end CE of the chuck CH, the base of the chuck CH may be damaged, or the damaged part may be extended or cut. I thought I could prevent it. Based on this knowledge, in the bag so that the apparent tangent angle γ (see Fig. 8 (C)) in the direction parallel to the chuck between both films F and F just before point P when filled with foamed plastic is 35 degrees We tried opening and closing the slider S with the contents in the container.

[0033] Then, although the apparent tangent angle γ was 40 degrees or less of the upper limit value of the angle a for deforming the film obtained in FIG. The base of this was scratched, or the scratched part was stretched or cut. When the slider S is moved in the direction of the arrow, that is, in the direction of closing the chuck CH, the force that should measure the tangential angle γ between the actual films at point P is a force that cannot be measured. But Chuck C

2

The actual tangent angle γ between the films exceeds 45 degrees in view of the degree of damage to the base of the heel.

2

It was speculated.

[0034] On the other hand, when the apparent tangential angle between the films γ force ¾0 degrees or less is attempted, at the normal slider S opening / closing speed (0.2 to 0.4 mZsec), the base of the chuck CH is scratched, It was hard for the wound part to stretch or break.

[0035] However, when the slider closing speed was extremely increased (0.5 to 0.7 m / sec), it was found that the base of the chuck was slightly damaged after being opened and closed several times. Force that seems to increase the tangential angle γ of the actual film at point P due to the increase in speed.

2

I couldn't measure the beam.

[0036] When the filling rate of the contents was lowered and γ was lowered to 20 degrees, the opening / closing operation was performed 100 times even at a normal opening / closing speed. When opening and closing more than 100 times, the chuck itself began to deform due to friction and repeated stress, and it was impossible to measure. [0037] From the above results, it was found that in the case of a normal opening and closing speed, γ is preferably 30 degrees or less, and preferably 20 degrees or less.

[0038] Examples of the present invention based on the above technical knowledge will be described below. In the present invention, the outer guide S6 of the slider S includes a drop-off prevention auxiliary protrusion AS that cooperates with the drop-off prevention protrusion S5. More specifically, in the embodiment shown in FIGS. 1 and 9, the drop-off prevention auxiliary protrusion AS cooperates with the drop-off prevention protrusion S5, and the end face on the opening end side of the slider S (FIG. 1). And the front end surface in FIG. 9 extends in the direction of the closed end CE of the chuck CH. That is, the drop-off prevention protrusion S5 and the drop-off prevention auxiliary protrusion AS cooperate with each other so that the apparent tangent angle γ between the films F of the chuck CH is 30 degrees or less, preferably 20 degrees or less.

That is, in this embodiment, the points P, P where the opening end side end surface, the inner surface, and the upper surface of both the drop-off preventing projections S5, S5 of the slider S intersect.

1 Passing through 2 and preventing dropout Auxiliary protrusions The two imaginary planes PL and PL that are inscribed in the tip Q and Q on the chuck side intersect each other at an angle Θ, and the angle Θ is within 30 degrees, preferably 20 It is set below the degree. The present inventor has confirmed that if Θ does not become 30 degrees or more due to pressure due to overfilling, there will be no problem at the normal switching speed.

[0040] The above-mentioned inner contacts Q and Q are not necessarily located at the tip of the drop-out prevention auxiliary protrusion AS.

1 2

Any position facing the chuck CH is required. Also, the shape need not be a triangular pyramid, but may be an arbitrary shape such as an ellipsoid.

[0041] If the planes PL and PL do not intersect and are parallel, the angle Θ is set to zero. More

1 2

In the embodiment of FIG. 9, the position of the intersection line M is located closer to the open end of the slider than the point P. However, if the position of the intersection line M is closer to the closed end of the slider than the point P, Θ is negative. Define that there is. In any of the above cases, the angle Θ satisfies the condition within 30 degrees.

[0042] When the bag is overfilled with compressible contents and the slider S is slid toward the closing end CE of the chuck CH to observe the behavior of the slider S when the chuck CH is closed, the slider S is It is not moving parallel to CH. That is, FIG. 7 is an arrow view of FIG. 5, but the slider S is slid toward the closed end CE of the chuck CH to When closing the chuck CH, a force that pushes the slider S upward from the overfilled contents acts, and the slider S makes an angle ε with respect to the chuck CH. The value of ε becomes a large angle when the width W of the chuck CH is small, and the value of ε becomes small when the width W is large, but ε is generally in the range of 5 to 30 degrees. Often around degrees.

In the embodiment shown in FIG. 9 described above, it may be preferable to compensate for the angle ε. For example, the dropout prevention auxiliary protrusion AS illustrated in Fig. 10 has sharp inner contacts Q and Q.

1 2 One point such as an arc with a long radius, not a convenient edge, and angles δ and δ forces S described later

1 2 Both are smaller than ε. In this case, when closing the chuck CH by sliding the open end SOE of the slider S toward the closed end CE of the chuck CH, the internal contact Q , Q is chuck CH table

1 2

The surface slides upward, and stress is generated in the direction to push open the auxiliary protrusion AS. As a result, the point P of the drop prevention protrusion S5 connected to the drop prevention auxiliary protrusion AS is also pushed open, so that the slider S also drops the chuck CH force.

[0044] In order to prevent the slider S from falling off due to the above-mentioned causes, it is preferable that the dropout prevention auxiliary protrusion AS satisfies the following conditions. That is, in FIG. 10, points P and P formed by the opening end side end face, the inner face and the upper face of the drop prevention protrusion S5.

1 Set a virtual plane PL that passes through 2 and circumscribes the top surface (points Q, Q) of the tip of each drop-off prevention auxiliary projection.

one two Three

Force With respect to a virtual plane PL parallel to the top surface of the slider at the points P and P

3 1 2 4 The angle formed by δ and δ (the line segment PL in the virtual plane PL and the line segment PL in the virtual plane PL are

1 2 3 31 4 41 Angle δ, angle between line segment PL in virtual plane PL and line segment PL in virtual plane PL

1 3 32 4 42 degrees δ). Here, at least one of the angles δ and δ is 5 degrees or more, preferably 20 degrees or more.

2 1 2

It is set so as to incline below the virtual plane PL from the drop-off prevention protrusion S5 to the drop-off prevention auxiliary protrusion AS so as to be upward.

Three

[0045] At least one of the angles δ and δ is directed toward the closed end CE of the chuck CH.

1 2

It should be inclined downward (content side) of chuck CH, but preferably both δ and δ

1 The virtual plane PL is inclined downward (on the contents side) of the chuck CH so that both 2 are 5 degrees or more.

Three

You should be.

[0046] The length of the dropout prevention auxiliary projection AS will be described. First, as illustrated in Figure 8 (C), Without the drop-off prevention auxiliary projection AS, the actual tangent angle γ at the saddle point when the slider S is moved in the direction of the arrow even if the apparent tangent angle γ of the film is the same.

2 It varies depending on the closing speed of Rider S and the rigidity and slipperiness of the film.

[0047] On the other hand, according to the experiment of the present inventor, the above condition (at least one of the angles δ and δ

1 2

If the imaginary plane PL is inclined downward (from the drop-off prevention protrusion S5 to the drop-off prevention auxiliary protrusion AS so as to be equal to or higher than the strength), the drop-off prevention auxiliary protrusion A

Three

When the length of S extends at least lmm or more from the open end side end face of the drop-off prevention projection S5 toward the closing end CE of the chuck CH (L≥l in Fig. 10), the normal closing speed of the slider S (0 2 to 0.4 mmZsec), and the drop-off prevention auxiliary projection AS has a length force S2 mm or more (Fig. 10! /, L≥ 2)! 4 to 0.6 mmZsec), it was found that γ = γ. Therefore, shedding prevention

1 2

It is preferable that the length of the auxiliary stopper projection AS is at least lmm (L≥l in Fig. 10), desirably 2mm or more (L≥2 in Fig. 10) from the opening end side end face of the drop prevention projection S5.

In the embodiment shown in FIG. 9 or FIG. 10, the dropout prevention auxiliary protrusion AS cooperates with the dropout prevention protrusion S5, and the opening end side end surface force of the outer guide S6 of the slider S CH It extends in the direction of the closed end.

On the other hand, in another embodiment shown in FIG. 11, the drop-off prevention auxiliary protrusion AS cooperates with the drop-off prevention protrusion S5 and protrudes downward from the lower side of the drop-off prevention protrusion S5. .

[0050] In FIG. 11, the slider S is mounted straddling on the chuck CH and sandwiches the chuck CH on both sides of the chuck CH. Protrusion AS is provided. The drop-out prevention auxiliary protrusion AS in FIG. 11 protrudes inward, and the drop-out prevention auxiliary protrusions pass through the inner tips T and T and points P and P of the drop-off prevention protrusion S5.

1 2 1 2

Two virtual planes PL and PL inscribed on the chuck side of the origin AS intersect at an angle j8

5 6

Yes. With this configuration, the film F is guided by the drop-off prevention protrusion S5 and the drop-off prevention auxiliary protrusion AS. Therefore, if the drop-off prevention auxiliary protrusion AS is designed so that the angle j8 is 30 degrees or less, FIG. Equivalent to keeping the angle _α between films F and F below 30 degrees To do. In fact, as shown in Fig. 8 (C), the contents are compressed by forcibly moving the slider CH toward the closed end CE direction (in the direction of the arrow) of the chuck CH with the opening of the chuck CH inflated. However, even when trying to close the chuck CH, γ can be kept below 30 degrees, and at the normal opening / closing speed, the base of the chuck CH may be scratched, or the scratched part may be stretched or cut. Hana was strong. The force that seems to be related to the rigidity of the film of the chuck CH base is not clear in this respect. However, the drop-off prevention auxiliary projection AS (Fig. 11) protruding downward from the lower force of the drop-off prevention projection S5 due to the inclination angle ε of the slider S shown in Fig. It is considered that the same effect as the prevention auxiliary protrusion AS (Fig. 9 or Fig. 10) extending in the closed end direction is exhibited.

[0051] For example, when the tilt angle ε force of the slider S is 30 degrees, the length H from the inscribed point T of the drop-off prevention auxiliary protrusion AS to the upper surface of the drop-off prevention protrusion S5 (FIG. 11) is at least 2 mm or more. If the dropout prevention auxiliary protrusion AS extends toward the bottom surface of the slider S (V, H H≥ 2 in Fig. 11), this is the opening end side of the slider S like the dropout prevention auxiliary protrusion AS in Fig. 10 Assuming that the end face force also extends in the direction of the closed end of the chuck CH (HX sin ε, ε = 30 °), the dropout prevention auxiliary projection AS in Fig. 10 is at least lmm from the open end side end surface of the dropout prevention projection S5. This is the case (L≥l in Fig. 10), and the same effect is obtained. Accordingly, it is preferable that the length H of the drop-off prevention auxiliary protrusion AS in FIG. 11 extends from the upper surface of the drop-off prevention protrusion S 5 to the lower surface of the slider S by at least 2 mm.

[0052] The drop-off prevention auxiliary protrusion AS (Fig. 11) provided below the drop-off prevention protrusion S5 on the slider S or the opening end side surface force of the slider S also extends in the direction of the closed end of the chuck CH. Although only the prevention auxiliary projection AS (FIGS. 9 and 10) may be provided, it is desirable to provide both of the fall prevention auxiliary projections AS at the same time.

[0053] The structure of the slider S of the present invention is structurally inferior in strength to the open end SOE of the slider S compared to the closed end SCE of the slider S, so that the content having compressibility such as clothing exceeds the inner volume of the bag body. To close the chuck CH with the slider S while compressing the packed contents, the slider S is closed from the open end SOE of the slider S to counter the pressure of the contents. Providing a drop-off prevention auxiliary protrusion AS having an appropriate strength over the toe SCE at the bottom of the slider S has the advantage that the strength of the open end of the slider S can be increased to counter the pressure of the contents.

[0054] Note that the present invention is not limited to the above-described disclosure, but can be applied to other structures such as a lighter and a chuck. For example, the present invention can be applied to chucks as shown in FIGS. 12 and 13 (A) and (B). Example

[0055] A film made by dry laminating 60 μm linear low density polyethylene and 15 nylon film, so that the inside of the bag is linear low density polyethylene. A flat bag having a depth of 170 mm was prepared. At the upper and lower ends of the flat bag, a sealing chuck CH having a width of 3 mm (Ll = 3 mm) and a shape as shown in Fig. 12 and made of linear low density polyethylene was provided. The second chuck CH2 as shown in FIGS. 1 to 5 does not exist, but a rib B is provided at the flange end.

[0056] One of the chucks CH provided on the top and bottom of the bag is not provided with a drop-off prevention auxiliary projection AS. A slider S having a shape as shown in Figs. The opening and closing of the chuck is performed with the same force as described in FIGS. 1 to 5 with the rib B in contact with or close to the second chuck CH2. The dimensions of slider S are 12mm in effective length in the direction parallel to chuck CH, 11.5mm in height, and 8mm in thickness.As shown in Fig. 7, the angle between chuck CH and chuck CH is closed. It had ε strength.

[0057] The saddle point formed by the opening end side end surface, the inner surface, and the upper surface of the drop-off preventing projection S5 was defined as a sharp end. The angle α created by the film at the base of the chuck CH is in the range of 40 to 80 degrees, and the sharp edges of the film on the film part of the male and female bases of the chuck CH The slider SSA was mounted in a state that caused irreversible deformation including.

[0058] Further, of the chucks CH provided at the top and bottom of the bag, the other chuck CH is formed by the opening end side end surface, the inner surface and the upper surface of the drop prevention projection, and the upper part from the saddle point has the same structure as the slider SSA. A slider SSB equipped with two sets of drop-off prevention auxiliary projections AS was installed below the saddle point. On the other hand, as shown in FIGS. 9 and 10, the drop-off prevention auxiliary protrusion is such that the opening end side surface force of the slider extends toward the closing end of the chuck. That is, the example in Figure 9 Chuck CH that has fallen prevention auxiliary projections as shown in Fig. 9 through the indicated points P and P

1 2

Q on the side tip, plane PL inscribed in Q, angle at which PL intersects Θ force 10 degrees, Fig. 10

1 2 1 2

The angles δ and δ shown in Fig. 5 are δ = δ = 35 degrees, and the length L of the point Ρ and the repulsive force is 2.

1 2 1 2 1 2

6mm. The other drop-off prevention auxiliary protrusion protrudes downward from the lower side of the drop-off prevention protrusion as shown in FIG. The angle β at which the planes inscribed in the chuck CH side cross each of the points P and P and points T and T illustrated in Fig. 11 is 14 degrees. The length まで up to the top surface is 2.5mm.

[0059] Sixty bags with slider SSA and slider SSB were prepared.

[0060] Using this bag body, the closed end of the slider SSA is located at a position 50 mm from the open end OE of the chuck CH, about 3Z4 of one chuck CH is opened, and the other side where the slider SSB is mounted In such a state that the chuck CH is fully closed, the apparent tangent angle γ of the film immediately before point P in Fig. 8 is maintained at 35 degrees (SA35), 40 degrees (SA40), and 45 degrees (SA45), respectively. After the foam body was combined with urethane foam 5 mm thick and the other chuck CH was opened and filled, the other chuck CH was closed. A total of 30 such filling bags were produced.

[0061] Further, using this bag body, the closed end of the slider SSB is positioned 50 mm from the open end OE of the chuck CH, and about 3Z4 of the other chuck CH is opened, and the slider SSA is mounted. With the chuck CH fully closed, the apparent tangent angle γ of the film immediately before point P in Fig. 11 is maintained at 35 degrees (SB35), 40 degrees (SB40), and 45 degrees (SB45), respectively. This bag was combined with 5 mm thick urethane foam, and one chuck CH was opened and filled, and then this one chuck CH was closed. A total of 30 such bags were created, 10 each.

[0062] The number of opening and closing times of the 10 S A35 filled bag bodies until each chuck SSA was opened and closed until the chuck CH base was damaged was found to be an average of 28.9 times and a standard deviation of 3.78. .

[0063] When the number of opening / closing of 10 SB35 filling bags until the base of the chuck CH was damaged by opening / closing each slider SSB was 100 times open / closed, all were sound. Note that the chuck CH performance itself due to friction and repetitive stress when opening and closing more than 100 times. Since it changed, it was hard to measure. A significant difference was observed between SA35 and SB35.

[0064] When the number of opening / closing operations until the base of the chuck CH was broken by opening and closing each of the 10 SA40 filling bag bodies SSA, the average was 12.0 times and the standard deviation was 1.83.

[0065] The number of opening / closing times of 10 SB40 filling bag bodies until the base of the chuck CH was broken by opening and closing each slider SSB was found to be an average of 80.5 times and a standard deviation of 6.65. A significant difference S was observed between SA40 and SB40.

[0066] When the number of opening / closing times of 10 SA45 filled bag bodies until each chuck S S A was opened and closed until the chuck CH base was damaged was measured, the average was 3.3 times and the standard deviation was 1.16. When the number of opening and closing of 10 SB45 filling bags until the base of the chuck CH was damaged by opening and closing each slider SSB, the average was 35.5 times with a standard deviation of 4.09. A significant difference S was observed between SA40 and SB40.

Brief Description of Drawings

FIG. 1 is a perspective view, partly in section, of one embodiment of a plastic bag with a slider according to the present invention.

FIG. 2 is a cross-sectional view taken along the line AA in FIG.

FIG. 3 is a cross-sectional view taken along the line BB in FIG.

FIG. 4 is a CC cross-sectional view of FIG.

FIG. 5 is a perspective view corresponding to FIG. 2 for explaining the relationship between the slider drop-off prevention protrusion and the opening state of the chuck portion of the plastic bag.

[FIG. 6] (A) to (D) are views showing various aspects of the sharp tip of the drop-off preventing projection.

FIG. 7 is a view taken along the line FF in FIG. 5 showing the state of the slider when the bag is filled with contents and the chuck is closed.

[Fig. 8] A diagram showing the relationship between the amount of bag contents and the plastic bag and slider.

FIG. 9 is a perspective view of an embodiment of a slider according to the present invention.

FIG. 10 is a perspective view of another embodiment of a slider according to the present invention.

FIG. 11 is a perspective view of still another embodiment of the slider according to the present invention. FIG. 12 is a cross-sectional view of another embodiment of a plastic bag chuck.

[FIG. 13] (A) and (B) are cross-sectional views of another embodiment of the chuck. Explanation of symbols

AS dropout prevention auxiliary protrusion

B rib

CH chuck

F Plastic film

F2 Female jaw of 2nd chuck

F1-1, F1-2, female jaws for sealing chuck,

Ml—1, Ml—2 Male jaws for sealing chuck

M2 2nd chuck male nail

OE chuck open end

CE chuck closed end

R1 Continuous pressing wall

R2 Continuous pressing rib

S slider

S1 aperture plate

S2 lid

S3 Open column

S4 Top surface

S5 Protrusion prevention

S6 Slider outer guide

S7 Connection groove

Claims

The scope of the claims

[1] In a plastic chuck with a slider in which a pair of male and female sealing chucks having a claw force is formed on the surface of the plastic film, and the slider is opened and closed by a slider, the slider has a pair of A drop-out prevention protrusion is provided, and the drop-out prevention protrusion is provided in the outer guide so as to protrude inward between the open end and the closed end of the slider, and the slider straddles the upper edge of the chuck. In this state, the chuck is sandwiched between the lower side of the chuck and the outer force, and the outer guide of the slider is a pair of dropouts for limiting the degree of opening of the chuck near the slider opening end. A plastic chuck provided with a slider, characterized by having a prevention auxiliary protrusion.

[2] A flange is provided on each opening side of the male and female claws of the sealing chuck, and an end of each flange is connected or contacted to connect or contact with the sealing chuck in an engaged state. First, the sealing chuck is opened by pushing a wedge-shaped opening plate into a closed plastic cylinder made up of a flanged portion, and the upper portion of the flange that is closed or in contact after the sealing chuck is opened. A plastic chuck provided with the slider according to claim 1.

[3] The drop-off prevention auxiliary protrusion cooperates with the drop-off prevention protrusion and extends in the direction of the opening end side force of the slider toward the closing end of the chuck. Plastic chuck with the slider described.

[4] The slide according to claim 1 or 2, wherein the drop-off prevention auxiliary protrusion cooperates with the drop-off prevention protrusion and protrudes downward from the lower side of the drop-off prevention protrusion. Plastic chuck with rider.

[5] The outer guide of the slider includes a drop-off prevention auxiliary protrusion whose opening end side force on the slider extends in the direction of the closed end of the chuck and a drop-off prevention auxiliary protrusion that protrudes downward from the lower side of the drop prevention protrusion. The plastic chuck provided with the slider of Claim 1 or 2 characterized by the above-mentioned.

[6] The plastic chuck provided with the slider according to any one of [1] to [5], wherein a part of the drop-off prevention protrusion has a sharp end.

[7] Prevent the chuck from falling off when sliding the slider toward the closed end of the chuck. Point P at the sharp edge that first contacts the chuck at the stop projection

1, P

2 and the point P

1, 2 virtual planes PL passing through P and inscribed on the chuck side of the drop-off prevention auxiliary projection

twenty one

The PL force ^ intersects at an angle Θ within 0 degrees.

2

A plastic chuck provided with the slider described in 1.

[8] A virtual plane that passes through the points P and P and circumscribes the upper surface of each drop-off prevention auxiliary projection

1 2

PL 1S Paired with a virtual plane PL parallel to the top surface of the slider at the points P and P.

3 1 2 4 so that at least one of the angles δ and δ is not less than 5 degrees.

1 2

8. The plastic chuck according to claim 7, further comprising a slider that is inclined downward toward the drop-off prevention auxiliary protrusion from the slider.

[9] The drop-off prevention auxiliary protrusion protrudes in the direction of the closed end of the chuck at least lmm or more from the opening end side end face of the drop-off prevention protrusion.

A plastic chuck provided with the slider described in 8.

[10] When the slider is slid toward the closed end of the chuck, the sharp edge that makes contact with the chuck first at each of the chuck drop prevention protrusions is point P.

1, P

2 and the point P

twenty five

6. PL intersects at an angle of | 8 within 30 degrees | 6

6

A plastic chuck provided with the slider described in 1.

[11] The plastic chuck provided with the slider according to [4], [5] or [10], wherein the drop-out prevention auxiliary protrusion protrudes downward by at least 2 mm or more on the opening end side upper surface force of the drop-off prevention protrusion.

12. The position of the sharp end is a point P or P at which the opening end side end surface, inner surface and upper surface of the drop-off preventing projection intersect each other. 6. Any one of L 1 The slurry described in the section

1 2

Plastic chuck with ider.

[13] A plastic chuck-attached bag body comprising the slider according to any one of claims 1 to 12.