Package opening knife

Abstract

In the package opening knife (1) of the present application, the main body portion (3) is provided with: an elongated grip portion (7); a cover portion (9) covering the knife tip (5A) in such a manner that it does not protrude outside; a housing portion (8) connecting the head portion side (X1) of the grip portion (7) and the back side (Y2) of the cover portion (9) and housing the blade body (5A); and an insertion portion (10) formed by the end surface (7A) of the head portion side (X1) of the grip portion (7) and the end surface (9A) of the belly side (Y1) of the cover portion (9) and opening to the belly side (Y1), the housing portion (8) having a raised portion (8A) raised from the end surface (7A) of the head portion side (X1) of the grip portion (7) and extending from the belly side (Y1) to the back side (Y2), and the cover portion (9) having a recess portion (9B) opposite to the raised portion (8A) from the end surface (9A) of the belly side (Y1) to the end surface (9C) of the back side (Y2).

Description

Technical Field

[0001] This invention relates to a packaging opening knife. Background Technology

[0002] Nowadays, in many food factories, operators use kitchen knives, utility knives, scissors, rope cutters, and other tools to cut open the packaging containing the contents.

[0003] Existing technical documents Patent documents Patent Document 1: Japanese Patent No. 6670887 Patent Document 2: Japanese Patent No. 6711095 Patent Document 3: Japanese Patent No. 5431093 Summary of the Invention

[0004] The problem that the invention aims to solve However, the following problem exists in the previous methods of opening packaging: the sharpness of the cut when cutting the packaging varies depending on the operator's skill level.

[0005] Furthermore, the previous methods of opening packaging have the following problems: it is difficult to know the deterioration of the sharpness, and when cutting with a deteriorated blade, foreign objects such as plastic pieces will be mixed into the packaging, which poses a problem from a safety point of view.

[0006] Therefore, the present invention was made in view of the above-mentioned problems, and its object is to provide a packaging opening knife that can easily cut the packaging to open it without relying on the operator's skill level.

[0007] Methods for solving problems The first feature of the present invention is: a packaging opener having a head side, a tail side, a ventral side, and a dorsal side, for cutting open a packaging containing a package, wherein the packaging opener comprises: a main body; and a blade housed in the main body and having a blade tip facing the ventral side, the main body comprising: an elongated grip portion; a cover portion that covers the blade tip so that it is not exposed to the outside; a receiving portion that connects the head side of the grip portion to the dorsal side of the cover portion and receives the blade; and an insertion portion formed by the end face of the head side of the grip portion and the end face of the ventral side of the cover portion and opening towards the ventral side, the receiving portion having a raised portion that protrudes from the end face of the head side of the grip portion and extends from the ventral side to the dorsal side, the cover portion having a recess opposing the raised portion from the end face of the ventral side to the end face of the dorsal side.

[0008] A second feature of the invention is a packaging opening knife capable of cutting a packaging body to open it, wherein the packaging body is formed by overlapping at least two sheets, and after one side edge of the packaging body is inserted into the opening of the packaging opening knife, as the packaging opening knife is advanced in a direction toward the other side edge of the packaging body, the portion of the packaging body to be cut is cut off by the tip of the blade in a bent and supported state inside the opening.

[0009] Invention Effects According to the present invention, a packaging opening knife can be provided that can easily cut the packaging to open it without relying on the operator's skill level. Attached Figure Description

[0010] Figure 1 This is a schematic front view showing the overall structure of the packaging box opening knife 1 of this embodiment.

[0011] Figure 2 yes Figure 1 The AA line cross-section diagram.

[0012] Figure 3 yes Figure 1 BB line cross-section diagram.

[0013] Figure 4 yes Figure 1 The CC line cross-section diagram.

[0014] Figure 5 This is a diagram illustrating an example of how the packaging box opening knife 1 of this embodiment is used.

[0015] Figure 6 This is a diagram illustrating an example of how the packaging box opening knife 1 of this embodiment is used.

[0016] Figure 7 This is a diagram illustrating an example of how the packaging box opening knife 1 of this embodiment is used.

[0017] Figure 8 This is a diagram illustrating an example of how the packaging box opening knife 1 of this embodiment is used.

[0018] Figure 9 This is a diagram illustrating an example of how the packaging box opening knife 1 of this embodiment is used.

[0019] Figure 10 It is Figure 1 The image with the cover section 9 deleted. Detailed Implementation

[0020] The following is for reference Figures 1 to 10An embodiment of the present invention will be described below. Figure 1 This is a schematic diagram showing the overall structure of the packaging box opening knife 1 of this embodiment from the front view. Figure 2 yes Figure 1 AA line cross-section diagram, Figure 3 yes Figure 1 BB line cross-section diagram. Figure 4 yes Figure 1 CC line cross-section diagram in the middle, Figures 5 to 9 This is a diagram illustrating an example of how the packaging box opening knife 1 of this embodiment is used. Figure 10 It is Figure 1 The diagram shows the state in which the outer cover 9 is removed, making the raised part 8A visible.

[0021] like Figure 1 As shown, the packaging opening knife 1 of this embodiment has a head side X1, a tail side X2, a ventral side Y1, and a dorsal side Y2.

[0022] In this embodiment, the packaging opener 1 is configured to cut open the packaging 100 containing the contents.

[0023] The contents include any one or more of solids, liquids, viscous fluids, and gases. The packaging body 100 is formed by overlapping at least two sheets. Typical materials for the packaging body 100 include thin films such as paper, corrugated paper, plastic, resin, and metal film. "Cutting" preferably includes either cutting the packaging body 100 to separation or forming a slit in a portion of the packaging body. "Opening" broadly includes communication with the outside of the packaging body 100, regardless of whether the contents are removed from the packaging body 100.

[0024] Furthermore, in this embodiment, the packaging opener 1 is described as a disposable type (a disposable type that is discarded without replacing the blade) used in the manufacturing process of the food industry, but the present invention can also be applied to other types of knives. For example, the packaging opener 1 can also be a replaceable blade type with a replaceable blade 5.

[0025] like Figure 1 As shown, the packaging opener 1 of the embodiment is mainly composed of a main body 3 extending along the length direction L and a blade 5 having a blade tip 5A facing the ventral side Y1. For example, the blade 5 is made of metal.

[0026] The main body 3 has a long, narrow gripping part 7, a cover part 9, a receiving part 8, and an insertion part 10.

[0027] like Figure 1As shown, the grip 7 is a component that is held by the operator's fingers so that the operator can use the packaging opening knife 1 to perform operations (opening operation of packaging 100, so-called cutting operation of packaging 100).

[0028] like Figures 1 to 4 As shown, the cover 9 is a component that covers the blade tip 5A in a way that prevents it from being exposed to the outside.

[0029] like Figure 1 As shown, the receiving part 8 is a component that connects the head side X1 of the gripping part 7 to the back side Y2 of the cover part 9. Additionally, as... Figure 1 and Figure 2 As shown, the housing section 8 houses the blade body 5.

[0030] In addition, such as Figure 1 and Figure 3 As shown, the receiving part 8 has a raised part 8A that protrudes from the end face 7A of the head side X1 of the holding part 7 and extends from the ventral side Y1 to the dorsal side Y2.

[0031] like Figure 1 , Figure 3 and Figure 4 As shown, the cover portion 9 has a recess 9B opposite to the raised portion 8A from the end face 9A on the ventral side Y1 to the end face 9C on the dorsal side Y2.

[0032] like Figure 1 As shown, the insertion portion 10 is formed by the end face 7A of the head side X1 of the gripping portion 7 and the end face 9A of the ventral side Y1 of the cover portion 9, and opens toward the ventral side Y1. For example, this opening may also be the area from the insertion portion 10 to the receiving portion 8. In addition, a raised portion 8A and a recessed portion 9B are provided inside this opening.

[0033] In addition, such as Figure 1 As shown, the extension direction BD of the blade tip 5A is along the length direction L of the main body 3.

[0034] The following is for reference Figures 5 to 8 An example of opening the cut-off portion (so-called edge portion) of the package 100 using the package opening knife 1 of this embodiment will be described.

[0035] First, such as Figure 5 and Figure 6 As shown, with the package 100 placed on the operating table 200, the operator holds the package 100 with their left hand and pulls the part to be cut slightly upward, so that one side edge 100E1 of the part to be cut of the package 100 comes into contact with the opening (insertion part 10) of the package opening knife 1 held with their right hand, and moves the package opening knife 1 along the traveling direction CD (i.e., approximately parallel direction) toward the other side edge 100E2 of the part to be cut of the package 100.

[0036] As a result, the part of the package 100 to be cut is inserted into the insertion part 10 of the package opening knife 1 (that is, the gap between the end face 7A of the head side X1 of the gripping part 7 and the end face 9A of the ventral side Y1 of the cover part 9).

[0037] Subsequently, as the operator continues to move the packaging opening knife 1 along the travel direction CD, the portion of the packaging 100 to be cut is as follows: Figure 7 As shown, the portion supported by the raised portion 8A and the recessed portion 9B is guided to the tip 5A of the packaging body opening knife 1, and as... Figure 8 The image shows the part cut off by the blade tip 5A. Among them, Figure 7 This is a diagram showing the state of the package opening knife 1 and the package 100 as observed from the destination of the travel direction CD.

[0038] According to the above structure, the cut-off portion of the packaging body 100 is supported and guided by the raised portion 8A and the recessed portion 9B. Therefore, the operator can easily and straighten the cutting operation of the packaging body 100 without relying on the operator's skill level.

[0039] In addition, such as Figure 1 As shown, the gripping part 7 may further have a finger placement part 7F recessed towards the dorsal side Y2 on the ventral side Y1.

[0040] Here, as Figure 6 and Figure 9 As shown, when opening the package 100, the operator places their thumb F1 on the back Y2 of the grip 7 and their index finger F2 on the finger placement 7F. Alternatively, the operator may place their thumb F1 on the finger placement 7F and their index finger F2 on the back Y2 of the grip 7 when opening the package 100.

[0041] According to this structure, the operator can easily hold the packaging opening knife 1, thus enabling a stable opening operation of the packaging 100.

[0042] Furthermore, the gripping part 7, the receiving part 8, and the cover part 9 can also be integrally molded from resin. For example, the resin can be appropriately selected from PP (polypropylene), ABS, elastomers, polycarbonate, etc., which are durable for sodium hypochlorite used in food factories, and then mixed with metal fillers to form the resin. The reason for mixing with metal fillers is that metal detectors can be used for detection, so as to avoid unwanted residues in the manufacturing process in the food industry.

[0043] This structure reduces the manufacturing cost of the packaging opening knife 1. Furthermore, this structure prevents clogging of the gripping part 7, the receiving part 8, and the cover part 9 by debris or other contaminants.

[0044] Alternatively, it could be, such as Figure 1 As shown, when viewed from the front, the end face 7A of the head side X1 of the grip 7 is inclined at 50° to 60° relative to the length direction L of the main body 3.

[0045] This structure improves operability when opening the cut portion of the package 100 using the package opening knife 1.

[0046] In addition, such as Figure 3 As shown, when viewed along the extending direction of the recess 9B, the angle S1 at the bottom of the recess 9B is in the range of 10° to 150°, preferably 30° to 120°, and more preferably 40° to 90°. Furthermore, when viewed along the extending direction of the raised portion 8A, the angle S2 at the top of the raised portion 8A is in the range of 10° to 155°, preferably 30° to 120°, and more preferably 40° to 90°.

[0047] Furthermore, when dealing with a thin packaging body 100, compared to dealing with a thick packaging body 100, by making the aforementioned angles S1 / S2 smaller acute angles, it is easier to cut off the portion of the packaging body 100 to be cut.

[0048] In this case, when viewed along the extending direction of the recess 9B (or the extending direction of the protrusion 8A), the bending angle of the cut-off portion of the packaging body 100 is in the range of 10° to 150°, preferably 40° to 130°, and more preferably 50° to 110°. Furthermore, in this embodiment, the extending direction of the recess 9B and the extending direction of the protrusion 8A are the same.

[0049] Among them, angles S1 and S2 can be the same value or different values.

[0050] According to this structure, when the packaging body opening knife 1 is used to open the cutting part of the packaging body 100, the cutting part of the packaging body 100 can reach the knife tip 5A without bending and at an angle that is easy to cut.

[0051] According to the packaging opening knife 1 of this embodiment, such as Figure 7 As shown, the portion of the packaging body 100 to be cut, inserted from the insertion part 10, forms a "<" shape through the raised part 8A and the recessed part 9B of the cover part 9. Thus, by forming a "<" shape with the portion of the packaging body 100 to be cut, when the blade tip 5A enters this portion (at the start of cutting), it can suppress the situation where the portion to be cut retreats (bends) in the thickness direction, making it difficult for the blade tip 5A to enter the portion to be cut, allowing for easy cutting into the portion and easy cutting of the packaging body 100.

[0052] As a result, the user can cut into the target area with the blade tip 5A in a single operation, eliminating the need for multiple cutting operations. While multiple cutting operations could potentially generate foreign objects such as plastic fragments from the packaging 100, cutting into the target area in a single operation suppresses the generation of such fragments.

[0053] In particular, when the packaging body 100 is thin, it lacks flexibility and is easily bent, making it difficult for the blade tip 5A to penetrate the part to be cut. Therefore, the structure of the packaging body opening knife 1 of this embodiment is effective in this situation.

[0054] Furthermore, even if the packaging 100 is bent, it is possible to cut it by moving the blade, which does not have the above-mentioned structure, forward or backward like a saw. However, in this case, the action of starting to cut the packaging 100 is in a different direction from the action of cutting the packaging 100 afterwards. Therefore, when this action changes, it is necessary to keep the blade tip on the packaging 100 and perform multiple cutting actions (secondary cutting, etc.). As a result, foreign objects such as plastic pieces of the packaging 100 may be generated.

[0055] According to the packaging opening knife 1 of this embodiment, the cutting of the packaging body 100 can be carried out in one operation in only one direction from the start to the end of the cutting, which can suppress the generation of foreign objects and prevent foreign objects from mixing into the food.

[0056] In addition, such as Figure 1 As shown, when viewed from the front, the angle between the extending direction Z of the grip 7 and the extending direction BD of the blade tip 5A can be within the range of 0° to 60°. Here, as... Figure 1 As shown, when viewed from the front, the angle between the extension direction Z of the grip 7 and the extension direction BD of the blade tip 5A is preferably close to 40°.

[0057] Through such Figure 1 The gripping part 7 is bent relative to the extending direction BD (length direction L) of the blade tip 5A, as shown. Figure 9 As shown, when using the packaging opener 1, the outer surfaces of the second joints of the user's middle finger F3 and ring finger F4 are likely to come into contact with the packaging 100.

[0058] As a result, when using the packaging opener 1, not only the end face 7A of the head side X1 of the grip 7, but also the middle finger F3 and the ring finger F4 cut along the packaging 100. Thus, the angle between the packaging opener 1 and the packaging 100 is constant, and the angle between the part of the packaging 100 to be cut and the blade tip 5A is also constant. The user can perform the cutting operation smoothly, and it is easy to use even for beginners.

[0059] In this case, when using the packaging opening knife 1 to open the cut-off portion of the packaging 100, the angle between the cut-off portion of the packaging 100 and the knife tip 5A is in the range of 30° to 70°.

[0060] Furthermore, if the ease of cutting the portion of the packaging body 100 is taken into consideration, when the thickness of the portion of the packaging body 100 to be cut is 0.05 mm to 0.4 mm, it is preferable to set the angle between the portion of the packaging body 100 to be cut and the blade tip 5A to 50° to 60°.

[0061] According to this structure, when using the packaging opening knife 1 to open the cut-off part of the packaging 100, the fingers (e.g., fingers other than the thumb) of the operator holding the grip 7 become guides, enabling the packaging opening knife 1 to move steadily forward in the direction of travel CD.

[0062] Figure 10 It is Figure 1 The diagram shows the state where the raised part 8A is visible after the cover part 9 is deleted.

[0063] like Figure 10 As shown, the raised portion 8A has a shape that gently bulges from the end face 7A of the head side X1 of the grip portion 7 towards the tip 5A from the insertion portion 10 side, and has a peak (apex) that extends to the tip 5A. Additionally, as... Figure 7 As shown, the cross-section of the recess 9B of the cover 9 is V-shaped.

[0064] When the packaging body 100 is inserted into the insertion part 10, the part of the packaging body 100 to be cut is pulled slightly upwards and inserted into the insertion part 10. When the packaging body opening knife 1 is moved along the surface of the end face 7A of the head side X1 of the gripping part 7, the part to be cut is guided from the end face 7A of the head side X1 of the gripping part 7 to the raised part 8A, and then smoothly inserted into the space between the recess 9B and the raised part 8A of the cover. Figure 7 As shown, the cut-off portion becomes a <-shaped curved state.

[0065] That is, by moving the packaging body opening knife 1 along the cutting direction through the raised part 8A and the recessed part 9B, the part to be cut can be made into a < shape.

[0066] Here, as Figure 3 , Figure 4 and Figure 7 As shown, the cross-sections of the raised portion 8A and the recessed portion 9B are approximately V-shaped.

[0067] In addition, such as Figure 7As shown, the cutting target portion of the packaging body 100 is supported by three points: the apex of the raised portion 8A and the two ends of the opening of the recess 9B of the cover portion 9. Therefore, the packaging body 100 will not come into full contact with the raised portion 8A and the recess 9B of the cover portion 9, the contact area is reduced, and the cutting operation can be performed smoothly.

[0068] In addition, such as Figure 7 As shown, the gap (space) between the raised portion 8A and the recessed portion 9B is 0.1 mm or more and 5.0 mm or less, preferably 1.0 mm or more and 3.0 mm or less, and as an example, it can also be set to 1.5 mm.

[0069] In addition, such as Figure 1 As shown, the back side Y2 of the gripping part 7 and the receiving part 8 are curves that bulge in the same direction towards the back side Y2.

[0070] According to the packaging opening knife 1 of this embodiment, the packaging can be easily cut to open without relying on the operator's skill level.

[0071] Explanation of reference numerals in the attached figures 1: Packaging opening knife; 3: Main body; 5: Blade; 5A: Blade tip; 7: Grip; 7A: Head side end face of grip; 7F: Finger placement; 8: Reception part; 8A: Raised part; 9: Cover; 9A: Ventral side end face of cover; 9B: Recess; 9C: Back side end face of cover; 10: Insertion part; 100: Packaging body; 100E1, 100E2: Side edges of packaging body; 200: Operating table; F1: Thumb; F2: Index finger; L: Length direction; BD: Extension direction of blade tip; CD: Travel direction of packaging opening knife; S1: Angle at the bottom of recess; S2: Angle at the top of raised part; X1: Head side; X2: Tail side; Y1: Ventral side; Y2: Back side; Z: Extension direction of grip.

Claims

1. A packaging opener having a head side, a tail side, a ventral side, and a dorsal side, for cutting open a packaging containing an item, wherein... The packaging opener is equipped with: Main body; and The blade is housed within the main body and has a tip pointing towards the ventral side. The main body comprises: A long, narrow grip; A cover that covers the blade tip in a manner that prevents it from being exposed to the outside; A receiving section connects the head side of the gripping section to the back side of the cover section and receives the blade. as well as The insertion portion is formed by the end face of the head side of the gripping portion and the end face of the ventral side of the cover portion, and opens toward the ventral side. The receiving portion has a raised portion that protrudes from the end face of the grip portion on the head side and extends from the ventral side to the dorsal side. The cover has a recess opposite to the raised portion from the end face on the ventral side to the end face on the dorsal side.

2. The packaging opening knife according to claim 1, wherein, The cross-sections of the raised portion and the recessed portion are approximately V-shaped.

3. The packaging opening knife according to claim 1 or 2, wherein, When viewed along the extension direction of the recess, the angle at the bottom of the recess is in the range of 10° to 150°. When viewed along the extension direction of the raised portion, the angle at the top of the raised portion is in the range of 10° to 150°.

4. The packaging opening knife according to claim 1 or 2, wherein, The cut portion of the package inserted from the insertion part forms a < shape through the raised part and the recessed part.

5. The packaging opening knife according to claim 1 or 2, wherein, The gripping part also has a finger placement part recessed towards the dorsal side on the abdominal side.

6. The packaging opening knife according to claim 1 or 2, wherein, The gripping part, the receiving part, and the cover part are integrally molded from resin.

Images