Tape holder

Abstract

To provide a tape holder that can easily and detachably hold a roll of cross-cut tape for manual application, and that can also easily cut the cross-cut tape. [Solution] The tape holder (1) is made of synthetic resin and consists of a plate-shaped body (2), a substantially cylindrical holding part (10) that protrudes perpendicularly from the main surface of the body and detachably mounts a roll (R) of cross-cut tape (T) with its hollow core (C) rotatably supported, and a columnar cutting part (20) that protrudes substantially parallel to the holding part from the main surface and has a metal cutting blade (30) for cutting the cross-cut tape integrally fixed to it. The holding part and the cutting part are supported in a cantilevered manner, with each open on one side of the body.

Description

Technical Field

[0001] The present invention relates to a tape holder for holding and cutting a cross-cut tape for hand application, which prevents drying of the paste after pasting the edge of wallpaper and prevents the paste of one wallpaper from adhering to the surface of the other wallpaper during the lap cutting for forming the seam of the wallpaper in the process of pasting the wallpaper on the wall surface.

Background Art

[0002] In the work of pasting wallpaper on the wall surface, the ends of adjacent wallpapers are overlapped vertically, and by performing lap cutting in which the overlapped portion is cut in the center, if the upper cut piece and the lower cut piece are removed, the seams of the adjacent wallpapers will be continuous.

[0003] When the ends of adjacent wallpapers are overlapped vertically in this way for lap cutting at the seam, the paste on the back surface of the upper wallpaper adheres to the surface of the lower wallpaper. Therefore, it is common to pre-paste a cross-cut tape on the back surface of the edge of the wallpaper after pasting to protect the paste surface.

[0004] This cross-cut tape is removed together with the end pieces cut from the upper and lower wallpapers after lap cutting. As a finishing process, the seam between the wallpapers is pressed against the floor surface with a roller to complete the continuous pasting of the wallpapers. By using the cross-cut tape, the adhesion of the paste to the surface of the wallpaper in the seam area is avoided. As a result, not only does the paste adhering to the wallpaper surface dry and harden, requiring a lot of time for wiping, but also troubles such as discoloration of the wallpaper due to the remaining paste components are prevented in advance.

[0005] As described above, the cross-cut tape is cut together with the wallpaper while being sandwiched between the upper and lower wallpapers. At that time, it is manufactured very thinly so that there is no step such that the blade is displaced.

[0006] Commercially available cross-cut tapes typically come in the form of a roll wound around a hollow core. Unlike typical adhesive tapes, they are not thick, and are mostly made of polyethylene, being very thin, for example, about 0.01mm to 0.02mm thick.

[0007] Cross-cut tape is used when applying wallpaper, but since wallpaper is usually applied sequentially on-site using a wallpaper pasting machine, many wallpaper pasting machines are equipped with a mounting section that holds a roll of cross-cut tape in a retractable manner (see, for example, Patent Documents 1, 2, and 3).

[0008] In this case, the cross-cut tape is passed through the downstream roller of the wallpaper pasting machine and continuously set on the back of one end of the wallpaper after it has been pasted. For this reason, the roll product set in this wallpaper pasting machine is standardized to have a very long tape length and a relatively large roll outer diameter.

[0009] On the other hand, there are also rolls of cross-cut tape designed for manual application (handheld type) where the worker holds and applies it directly to the wallpaper. In areas where wallpaper cannot be applied at its original size from the wallpaper pasting machine, such as the top and bottom edges or around window frames, and where the wallpaper must be cut to adjust the size and shape before application, the cross-cut tape is used by cutting it to the appropriate length for each specific area. This handheld type of cross-cut tape is standardized as a small roll type with a relatively small roll diameter to facilitate manual application. [Prior art documents] [Patent Documents]

[0010] [Patent Document 1] Japanese Patent Publication No. 2021-24218 [Patent Document 2] Japanese Patent Publication No. 2021-75046 [Patent Document 3] Utility Model Registration No. 3169399 Gazette [Overview of the project] [Problems that the invention aims to solve]

[0011] The handy cross-cut tape, which comes in small rolls with a small diameter for easy application by hand, is actually inefficient to use because it requires manual unrolling, cutting to the required length with scissors, or tearing it by hand before application. This is a time-consuming and cumbersome process.

[0012] Therefore, there is a need for a dedicated tape holder that can easily hold cross-cut tape for manual application in a way that makes it easy to dispense from the roll, and that can also be easily cut to the required length. However, a practical dedicated holder does not yet exist.

[0013] In view of the above problems, the object of this invention is to provide a tape holder that can hold a roll of cross-cut tape for manual application in a detachable and easily dispensed manner, and that has a cutting section that can easily cut the cross-cut tape dispensed from the roll to any desired length. [Means for solving the problem]

[0014] To achieve the above objective, the tape holder according to the invention described in claim 1 is a tape holder for holding a roll of cross-cut tape for wallpaper installation and for cutting the cross-cut tape unwound from the roll, A main body formed in a plate shape, A substantially cylindrical holding portion is formed projecting perpendicularly from the main surface on the front side of the main body, which rotatably supports the hollow core of the roll of the cross-cut tape and allows the roll to be attached and detached. The main body comprises a columnar cutting section formed at a position spaced apart from the holding section, projecting substantially parallel to the holding section from the main surface, and having a metal cutting blade integrally fixed to it for cutting the cross-cut tape unwound from the roll mounted on the holding section, The main body, the holding portion, and the cutting portion are integrally molded from synthetic resin, and the holding portion and the cutting portion are supported in a cantilevered manner on one side of the main body, with each being open.

[0015] The tape holder of this invention, having the above configuration, is cantilevered, with the holding portion and cutting portion protruding in the same direction from the plate-shaped body. Since one side of the tape holder is completely open, in actual use, the tape can be easily attached simply by inserting the roll of cross-cut tape into the holding portion from the side of the body. Furthermore, even in a cluttered work environment, for example, while working with gloves on, tape replacement can be performed very easily.

[0016] Furthermore, since the remaining amount of tape and the application position can be directly observed during the installation process, and the tape can be cut to the required length as needed, work efficiency is significantly improved compared to handling exposed rolls of cross-cut tape.

[0017] Furthermore, this cantilevered structure enables one-piece molding that allows for die-cutting in one direction. This simplifies the overall manufacturing process and minimizes the weight of the entire holder, resulting in a lower production cost compared to typical tape holders for various tapes, which use a structure that pivotally supports the tape roll between a pair of plate sections, requiring the manufacture of multiple parts and complex assembly of these parts.

[0018] Furthermore, it is desirable that the cylindrical holding portion of the present invention be provided with a means to prevent the mounted roll of cross-cut tape from falling off during use. In this invention, the holding portion has a plurality of slits in its wall portion that are cut out along the axial direction from the open end portion, allowing for elastic deformation in the radial direction, and a return portion is integrally formed on at least a part of the end portion for engaging the end of the hollow core of the mounted roll, and in an unloaded natural state, the outer diameter of the return portion is formed to be larger than the inner diameter of the hollow core, while the maximum outer diameter excluding the return portion is formed to be slightly smaller than the inner diameter of the hollow core.

[0019] This fall prevention mechanism securely holds the roll of cross-cut tape after it has been attached to the holder by providing a return portion at the tip of the holder portion with an outer diameter larger than the inner diameter of the hollow core. During attachment, the return portion can pass through the inside of the hollow core due to the elastic deformation caused by the slit portion formed in the wall of the holder portion, making attachment and detachment easy.

[0020] Furthermore, because the maximum outer diameter of the retaining part, excluding the return portion, is formed to be slightly smaller than the inner diameter of the hollow core, the sliding resistance of the retaining part surface against the inner circumferential surface of the hollow core is minimized, thus ensuring the tape roll's rotatability. Therefore, in dynamic work such as wallpaper installation, the roll will not unexpectedly fall off, and the tape can be fed out smoothly at the same time.

[0021] As for the material of the tape holder including the holding part of this invention, a material with appropriate rigidity that does not deflect excessively in order to ensure the holding force of the tape roll is appropriately selected. In particular, polycarbonate is desirable because it has high mechanical strength even if the thickness of the cylindrical part of the holding part is about 2 mm, it has high rigidity that does not deflect easily under the weight of the roll, and has high dimensional stability. This is because even with such a high-rigidity material, elastic deformation for attaching and detaching the roll is possible through multiple slits, and good holding force can be obtained due to its high elastic recovery and spring constant.

[0022] Of course, not only polycarbonate but other materials can also be adopted. For example, PET (polyethylene terephthalate) having rigidity equivalent to or higher than that of polycarbonate, medium-rigidity ABS (acrylonitrile-butadiene-styrene) or POM (polyacetal) which is more flexible than polycarbonate but can maintain appropriate rigidity can be mentioned. Also, PP (polypropylene), PE (polyethylene), and PA (polyamide / nylon) which are soft and have low rigidity and thus may lack rigidity as a holding part as they are, can be adopted if the necessary rigidity can be obtained by containing glass fibers for reinforcement.

[0023] In addition, the columnar cutting part in the present invention is one in which a metal cutting blade is integrally fixed. If the cutting blade is configured to be replaceably mounted, slight wobbling is likely to occur in the mounting part, and there is a risk that the cutting of the cross-cut tape having a flexible and stretchable property may not be stable. Therefore, it is desirable to ensure sufficient rigidity at the mounting part of the cutting blade by integrally fixing the cutting blade to the cutting part.

[0024] For the fixing of this cutting blade, it is sufficient if a state where it is partially buried in the cutting part made of substantially synthetic resin can be obtained. Therefore, when the cutting part, the holding part, and the main body are formed by integral molding using a mold, complete integration can be achieved by insert molding. Also, in the case of molding by a 3D printer, if the cutting blade is inserted during the modeling and resin is laminated thereon to complete the tape holder, integration in a state where a part of the cutting blade is buried can also be achieved. It is also possible to heat the resin at a predetermined part after molding to bury the cutting blade.

[0025] Furthermore, the columnar cutting portion in this invention has a cross-sectional shape that allows for smooth tape feeding and cutting with respect to a fixed cutting blade. Specifically, the cutting portion has a roughly claw-shaped contour that curves outward from the holding portion in a cross section perpendicular to its protruding direction, and then folds back inward. The curved surface of this contour forms a guide surface that guides the cross-cut tape fed out from the holding portion upward from the lower end of the contour, and a slit is formed at the base of the cutting blade that holds the cutting blade, such that the cutting edge of the cutting blade is exposed diagonally downward and outward away from the holding portion.

[0026] According to the cross-sectional shape of this cutting section, the cross-cut tape, unfurled from the holding section's roll, moves downward towards its roughly claw-shaped lower end, passes under the folded top from the inside, and is fed outwards and upward. Because the blade tip protrudes diagonally downward from this folded top, when an operator holding the main body pushes down on the cross-cut tape being pulled upward by rotating the tip, the blade tip bites into the cross-cut tape like a wedge, allowing the tape to be cut with relatively little force.

[0027] With the cutting section shape described above, only the blade tip is exposed facing downwards, making it difficult for the hand to touch the blade tip. Furthermore, by covering the slightly exposed corner of the blade tip on the open side of the cutting section, even greater safety can be ensured.

[0028] Specifically, in this invention, it is preferable that the cutting portion has a side wall that protrudes from the open end in its protruding direction, covering the corner of the mounted cutting blade in the longitudinal direction from the side. This side wall eliminates the risk of touching the corner of the blade tip, even during complex operations.

[0029] Furthermore, in this invention, it is desirable to minimize the outer shape of the main body, which determines the maximum dimensions of the tape holder, to the minimum area necessary for work efficiency. Therefore, the outer contour of the main body is formed in a deformed oval shape, consisting of a first arc portion centered on the holding portion, a second arc portion centered on the cutting portion with a smaller radius than the first arc portion, and a straight section connecting the first and second arc portions in the tangential direction. It is preferable that the radius of the first arc portion is formed to be smaller than the maximum outer radius of the roll of cross-cut tape to be mounted.

[0030] First, by keeping the support area of ​​the holding section, which is the largest surface area of ​​the main body, smaller than the outer diameter of the roll when not in use, and by making the overall shape a deformed oval, there are no corners on the main body that would interfere when the worker grips the end of the cross-cut tape or presses it directly against a wall, allowing for smooth operation. In particular, the physical handling of the tape holder is improved when working in corners of walls or in narrow spaces.

[0031] Furthermore, in addition to its cantilever structure, the fact that the main body is smaller than the outermost edge of the roll allows the operator to directly see the remaining amount of tape and the dispensing position from the back, directly above, or at an angle, which is advantageous in cross-cut tape application where precise positioning is required.

[0032] Furthermore, in order to reduce the weight of the tape holder of this invention, it is effective not only to reduce the area of ​​the main body as described above, but also to reduce the thickness. However, even if a high-rigidity material is used, since the main body is plate-shaped, if it is thin overall, there is a risk that it will bend when the cross-cut tape is pulled out. Therefore, by providing not only thin-walled sections but also thick rib sections, it is possible to ensure high rigidity that prevents bending, even with an integrally molded structure.

[0033] In this case, specifically, the main body has a rib portion with a relatively large thickness and a thin-walled portion with a relatively small thickness surrounded by the rib portion, and the rib portion may include an outer peripheral rib formed around the entire circumference of the outer contour of the main body, a grid-like rib formed on the main surface of the main body, and a linear rib on the back surface of the main body extending from the projection area of ​​the cutting portion toward the vicinity of the holding portion.

[0034] The grid-like ribs on the main surface of the front side prevent the entire body from bending, but on the back side of the body, the heavily loaded cutting section and the holding section are connected by straight ribs, which effectively suppresses the twisting characteristic of cantilever structures, that is, the twisting of the body between the two protrusions, the holding section and the cutting section.

[0035] Furthermore, the cutting section, which protrudes columnarly from the main body, is subjected to a strong bending load that causes it to bend towards the holding section when cutting the tape. However, the straight ribs on the back allow the load to be directly relieved from the base of the cutting section to the base of the holding section. In particular, increasing the thickness of the projected area of ​​the cutting section ensures sufficient thickness to withstand repeated loads applied through the cutting blade.

[0036] Furthermore, the outer perimeter ribs prevent deformation such as bending or warping of the edges of the plate-shaped body, and stably fix the overall shape of the body. Through the interaction of these ribs, both the lightweight body and the mechanical rigidity required to support the holding and cutting sections are achieved. In addition, these ribs also serve as finger grips and anti-slip features when a worker uses the holder while wearing gloves.

[0037] Furthermore, if the cylindrical holding portion in this invention is formed together with the main body and the cut portion by integral molding using a mold, an opening will be formed in the main body around the base of the holding portion due to structural constraints of the mold (avoidance of undercuts). In this case, it is desirable to provide ribs around the periphery of the opening for reinforcement. Also, if the tape holder of this invention is formed by a manufacturing method other than integral molding using a mold, such as a 3D printer, such an opening is not necessarily required.

[0038] In this invention, the cutting blade is integrally fixed to the cutting portion of the tape holder, but it is desirable that the cutting edge be shaped to be suitable for cutting cross-cut tape, which differs from general adhesive tape. Therefore, in this invention, the cutting blade has a sawtooth-shaped cutting edge along its longitudinal direction, and the cutting edge has a plurality of first peaks arranged in the central region and a plurality of second peaks arranged in the longitudinal end regions, and it is preferable that the height of the second peaks is formed to be higher than the height of the first peaks.

[0039] This blade shape allows the higher blades to first make contact with both sides of the tape, ensuring a clean cut that initiates the cutting process, even with very thin tape, without tearing. This is because, compared to a flat blade, the force is concentrated on specific higher blades, allowing cutting to begin with relatively light pressure.

[0040] Furthermore, for the cutting blade used in the tape holder of this invention, it is desirable that it be made of metal that has corrosion resistance and toughness that prevents breakage even when thin, given its use in the humid environment associated with the use of adhesive, such as in wallpaper installation. Therefore, in this invention, it is preferable that the cutting blade be a rectangular, thin plate-like member with a thickness of 0.15 mm or more and 0.25 mm or less, formed from spring stainless steel.

[0041] Spring-grade stainless steel (SUS304CSP-H) is a stainless steel whose hardness has been greatly increased by cold rolling. It possesses excellent corrosion and heat resistance, as well as high spring properties. Therefore, as a cutting blade, it exhibits equal or greater rigidity and sharp cutting performance compared to general cutter blades, even though it is thinner. With a cutting blade made of this spring-grade stainless steel, a good cutting condition can be maintained over a long period of time in the tape holder of this invention, which is fixed to the cutting part without being replaced.

[0042] Furthermore, with cross-cut tape, which is much thinner than typical adhesive tapes, a thick blade may cause it to be crushed and slip away before it can cut. However, a thin blade of about 0.2 mm made of spring stainless steel, with its sharp cutting ability, makes it easier to cut thin tape with less force. [Effects of the Invention]

[0043] As described above, the tape holder according to this invention has a cantilevered, one-piece molded structure in which the holding part and the cutting part protrude from a plate-shaped body, and by completely opening one side of the body, the roll of cross-cut tape can be easily attached by simply inserting it into the holding part from the side. Furthermore, the process from pulling out the cross-cut tape to cutting can be completed simply, resulting in a significant improvement in work efficiency compared to conventional wallpaper installation, where cutting work had to be done in an unstable state while holding the exposed roll with bare hands because there was no dedicated holder. [Brief explanation of the drawing]

[0044] [Figure 1] This is a perspective view showing the overall configuration of a tape holder according to one embodiment of the present invention, where (a) is a perspective view from the front and (b) is a perspective view from the back. [Figure 2] Figure 1 is a front view of the tape holder. [Figure 3] Figure 1 is a bottom view of the tape holder. [Figure 4] Figure 1 is a side view of the tape holder. [Figure 5] Figure 1 is an enlarged view showing the cutting blade before it is fixed to the cutting section; (a) is a perspective view and (b) is a plan view. [Figure 6] Figure 5 is an explanatory diagram showing the dispensing and cutting direction of the cross-cut tape in the tape holder of Figure 1, with (a) being the state before cutting and (b) being the state after cutting. [Figure 7] Figure 1 is a perspective view showing a roll of cross-cut tape mounted in the tape holder, with (a) being a perspective view from the front and (b) being a perspective view from the back. [Figure 8] Figure 7 is a front view illustrating the dispensing and cutting direction of the cross-cut tape in a tape holder equipped with a roll of cross-cut tape. [Modes for carrying out the invention]

[0045] As one embodiment of the present invention, a tape holder 1 with a cutting section, on which a roll of hand-applied cross-cut tape is attached, will be described below with reference to the configuration diagrams in Figures 1 to 4. In this embodiment, the dimensions are designed to correspond to a so-called small-roll type of commercially available hand-applied cross-cut tape, which is common in Japan, with a tape width of 45 mm and a roll diameter of 80 to 90 mm, and an example is given where it is constructed by integral molding using a mold.

[0046] Figure 1 is a perspective view showing the overall configuration of the tape holder 1 of this embodiment, where (a) is a perspective view from the front and (b) is a perspective view from the back. Figure 2 is a front view of the tape holder 1 according to this embodiment, Figure 3 is a bottom view, and Figure 4 is a side view. Figures 7 and 8 show the state in which a roll R of cross-cut tape T is attached to the tape holder 1 of this embodiment. Figure 7(a) is a perspective view from the front, Figure 7(b) is a perspective view from the back, and Figure 8 is a front view.

[0047] This tape holder 1 is integrally molded from a synthetic resin such as polycarbonate and comprises a plate-shaped main body 2, a substantially cylindrical holding portion 10 that protrudes vertically from the main surface on the front side of the main body 2, and a columnar cutting portion 20 that is formed at a position spaced apart from the holding portion 10 and protruding from the main surface substantially parallel to the holding portion 10. It is configured in a cantilevered manner with one side of the main body 2 open.

[0048] The holding section 10 is inserted from the open side into the roll R of the cross-cut tape T, and its hollow core C is rotatably supported. As shown in Figure 4, the cutting section 20 has a cutting blade 30 fixed to it by integral molding, and is configured to easily cut the cross-cut tape T by pressing it against the cross-cut tape T being fed out from the holding section 10 side.

[0049] In this embodiment, the holding portion 10 is designed to prevent the mounted roll R from falling off by forming four slits 11 in its wall at equilateral intervals along the axial direction from the open end, thereby enabling radial elastic deformation. In addition, a pair of return portions 12 are formed at two opposing locations on the end, extending perpendicular to the axial direction of the holding portion 10.

[0050] Therefore, when attaching the roll R to the holding part 2, the elastic deformation radially inward by the slit part 11 allows the return part 12 to pass through the inside of the hollow core C, and thus it can be detachably inserted into the holding part 2. After attachment, the locking force of the return part 12 securely holds the roll R of the cross-cut tape T. As a result, the roll R will not unexpectedly fall off during wallpaper installation work.

[0051] In this embodiment, the height of the substantially cylindrical main body portion 10M from the main body 2 of the holding portion 10 to the lower end of the return portion 12 is made slightly larger than the tape width, thereby ensuring secure insertion of the roll R. For the commercially available tape with a width of 45 mm, for example, a height of 45.8 mm is sufficient. Furthermore, by setting the thickness of the substantially cylindrical main body portion 10M to 2-3 mm and extending the slit portion 11 to approximately the center of the height of the substantially cylindrical main body portion 10M, good radial elastic deformation can be obtained while ensuring the rigidity of the holding portion 10.

[0052] The return portion 12 has a planar outer diameter that is slightly larger than the inner diameter of the hollow core C, so that it partially catches on the hollow core C in the thickness direction after the roll R is mounted. However, its outer diameter is set so that it does not extend beyond the outer circumference of the hollow core C.

[0053] Furthermore, the holding portion 10, excluding the return portion 12, has its largest diameter at the upper end outer diameter D1 of the substantially cylindrical main body portion 10M, which is slightly smaller than the inner diameter of the hollow core C. As a result, the sliding resistance of the holding portion 10 against the inner circumferential surface of the hollow core C after the roll R is mounted is minimized, thus ensuring the rotatability of the roll R. Therefore, the cross-cut tape T can be fed out lightly and smoothly.

[0054] In addition, the upper region of the roughly cylindrical main body 10M, when the roll R is mounted, undergoes elastic deformation in the inward radial direction due to the slit 11, along with the return portion 12, reducing its outer diameter and making it easier to insert into the hollow winding core C. However, the lower region without the slit 11 does not change its outer diameter. Therefore, the roughly cylindrical main body 10M is slightly reduced in diameter from the upper end to the lower end. That is, the outer diameter D2 at the lower end is smaller than the outer diameter D1 at the upper end. This makes it easier to insert the holding portion 10 into the hollow winding core C along its entire length. The difference between the outer diameter D2 at the lower end and the outer diameter D1 at the upper end is about 1 mm, which provides sufficient sliding clearance with respect to the inner circumference of the hollow winding core C.

[0055] Furthermore, the cutting section 20 in this embodiment has a roughly claw-shaped contour in a cross section perpendicular to its protruding direction. Its cross-sectional outer shape is curved away from the holding section 10 and then folds inward, and the curved surface of this contour forms a guide surface 21 that guides the cross-cut tape T unwound from the holding section 10 upward from the lower end of the contour. The cutting blade 30 is embedded in the cutting section 20 as an embedded portion 23 at its base, such that only the cutting edge is exposed diagonally downward and outward from the top portion 22 of the folded portion of the contour, away from the holding section.

[0056] Thus, in the cutting section 20, which has a roughly claw-shaped cross-sectional contour, as shown in Figures 7 and 8, the cross-cut tape T unwound from the roll R attached to the holding section 10 passes under the cutting section 20 from below, crosses over the top 22 at its lower end, and is then pulled out upward along the guide surface 21, as shown in the cross-sectional view of Figure 6(a).

[0057] Then, when the desired length has been drawn out, the operator holding the main body 2 pulls the cross-cut tape T strongly upward and simultaneously rotates the cutting section 10 downward, pushing the top 22 down against the cross-cut tape. The cutting edge 30 protruding from the top 22 bites into the cross-cut tape T like a wedge, allowing the cross-cut tape T to be cut with relatively little force.

[0058] Furthermore, in this embodiment, the cutting section 20 has a shape in which a side wall portion 25 protrudes from the open end in the direction of protrusion from the main body 2 so as to cover the corner of the mounted cutting blade 30 in the longitudinal direction from the side. This side wall portion 25 covers the corner of the blade tip that is slightly exposed from the cutting section 20, so there is no risk of touching the corner of the blade tip even during complicated work, thus ensuring a higher level of safety.

[0059] In this embodiment, the maximum surface area of ​​the main body 2 is made smaller than the maximum outer diameter when the roll R is not in use, thereby improving the operability of the main body 2, such as its rotation during tape cutting, and the visibility of the roll R and cross-cut tape T during operation.

[0060] Specifically, the main body 2 has an outer contour that is formed in a deformed oval shape, consisting of a first arc portion 2S1 centered on the holding portion 10, a second arc portion 2S2 centered on the cutting portion 20 with a smaller radius than the first arc portion 2S1, and a straight portion connecting the first arc portion 2S1 and the second arc portion 2S2 in the tangential direction, with the radius of the first arc portion 2S1 being smaller than the maximum outer radius of the roll R.

[0061] With this external shape of the main body 2, there are no corners that would interfere when the worker pinches the end of the cross-cut tape T with their fingers or presses it directly against the wall surface, allowing for smooth operation of various tasks. In particular, the physical handling of the tape holder 1 is easier when working in corners of walls or in narrow spaces. In this embodiment, the maximum outer radius of the roll R is set to 40-45 mm, the radius of the first arc portion 2S1 is set to approximately 30 mm, and the radius of the second arc portion 2S2 is set to approximately 18-20 mm.

[0062] Furthermore, in order to achieve both lightweight design and mechanical strength for maintaining its shape, the main body 2 has a rib section with a relatively large thickness and a thin-walled section 5 with a relatively small thickness surrounded by the rib section. This rib section also serves as a grip for the fingers when the worker grasps and uses the tape holder 1 while wearing gloves, thus also functioning as an anti-slip feature.

[0063] In this embodiment, the rib portion includes an outer peripheral rib 3 formed around the entire circumference of the outer contour of the main body 2, a grid-like rib 4 formed on the main surface of the main body 2, and a linear rib 7 extending from the projection area 6 of the cut portion toward the vicinity of the holding portion 10 on the back surface of the main body 2. Furthermore, in this embodiment, since the main body 2, the holding portion 10, and the cut portion 20 are integrally molded, an opening 8 for demolding during the molding process is formed around the base of the holding portion 10, and therefore reinforcing ribs 9 are also provided around the periphery of this opening 8.

[0064] The grid-like ribs 4 on the front main surface primarily prevent deflection of the entire body 2. On the back side, by increasing the thickness of the projection area 6 of the cutting section 20, sufficient thickness is ensured in the columnar protruding cutting section 20 to withstand the repeated loads applied via the cutting blade 30 when cutting tape. The linear ribs 7 extending from this projection area 6 toward the holding section connect the cutting section 20 and the holding section 10, which experience significant loads when cutting tape, thereby effectively suppressing the twisting of the body 2 that occurs between the two protrusions characteristic of a cantilever structure.

[0065] Furthermore, the outer periphery rib 3 and reinforcing rib 9 prevent bending and warping of the edges of the plate-shaped main body 2, and stably fix the overall shape of the main body 2. Through the interaction of these ribs (3, 4, 7, 9), both the lightweight nature of the main body 2 and the mechanical rigidity required to support the holding portion 10 and the cutting portion 20 are achieved. In this embodiment, if the thickness of the thinnest thin-walled portion 5 is, for example, 2 mm, the thickness of the grid-like rib 4, outer periphery rib 3, and reinforcing rib 9 is set to 3-4 mm. In addition, the thickness of the projection area 6 of the cutting portion 20 and the linear rib 7 is set to 5-6 mm.

[0066] As shown in Figure 4, the cutting blade 30 is integrally fixed to the cutting section 20 with only the cutting edge exposed. In this embodiment, the cutting blade 30 is made of spring stainless steel (SUS304CSP-H) and has a rectangular shape as shown in Figure 5. Depending on the material, the cutting blade 30 can be made thinner than a typical cutter blade. In this embodiment, the thickness is 0.2 mm.

[0067] The cutting blade 30 is fixed to the cutting section 20 by insert molding, which is performed when the cutting section 20, the holding section 10, and the main body 2 are integrally formed using a mold, resulting in a partially embedded and integrated state. This integration completely eliminates any wobbling at the mounting section, as can occur with replaceable mounting methods, allowing for stable cutting of cross-cut tape T, which is made of a flexible and easily stretchable material.

[0068] Furthermore, since the cutting blade 30 is not replaced, it does not require fixing parts such as bolts, and the troublesome process of attaching and detaching fixing parts is also eliminated. This improves the overall efficiency of the work. The cutting blade 30 is provided with multiple through holes 31 for positioning relative to the mold during insert molding.

[0069] In this embodiment, the cutting edge of the cutting blade 30 has a plurality of first peaks 32 arranged in the central region along one of the long sides of the rectangular shape of the cutting blade 30, and a plurality of second peaks 33 arranged in the regions at both ends thereof, with the height of the second peaks 33 being higher than the height of the first peaks 32.

[0070] The total length W of the cutting blade 30, which has such a sawtooth-shaped cutting edge, is the effective cutting length. This length is longer than the tape width so that the effective cutting length can sufficiently contact the entire width of the cross-cut tape T at once and cut efficiently. In this embodiment, as mentioned above, the tape width is 45 mm, while the total width W of the cutting blade 30 is 50 mm.

[0071] The width w1 of the central region where the first peak 32 is located is set to approximately 3 / 5 of the total width W, and the width w2 of the end regions where the second peak 33 is located is set to approximately 1 / 5 of the total width W. Because the width and spacing of each peak are the same for the first peak 32 and the second peak 33, the tip of the higher second peak 33 is more acute.

[0072] By making the ridges of the sawtooth higher in the areas at both ends than in the central area, the higher second ridges 33 make contact with both sides of the cross-cut tape T, concentrating force here and ensuring that the initial cuts that initiate the cutting are reliably made. As a result, even very thin tapes are not torn, cutting can be started with relatively light pressure, and the tape can be cut cleanly across its entire width.

[0073] Furthermore, the difference h2 between the protruding height h1 of the first peak 32 and the protruding height h3 of the second peak 33 was set to 0.5 mm or more and 1 mm or less. With a height difference smaller than this lower limit, the initial cut accompanied by the concentration of force on the higher peak is not made, and the effect of the height difference is difficult to obtain. Also, with a height difference larger than the upper limit, the cutting after the initial cut does not follow well, and there is a risk of incomplete cutting. In this embodiment, the protruding height h1 of the first peak 32 was set to approximately 1.2 mm, and the difference h2 with the protruding height of the second peak 33 was set to approximately 0.7 mm.

[0074] With the tape holder 1 of this embodiment having the above configuration, the entire process from unwinding to cutting can be completed continuously and efficiently while the roll R of the cross-cut tape T is being held. In addition, the special shape of the cutting edge of the cutting blade 30 significantly improves the cutting performance of the tape, further improving the overall efficiency of the work.

[0075] Furthermore, the dimensions and materials of each part of the tape holder in this invention are not limited to those exemplified in the above embodiment, but are appropriately set according to the size of the cross-cut tape and its roll. [Explanation of Symbols]

[0076] 1: Tape holder 2: Main unit 2S1: First arc section 2S2: Second arc section 3: Outer ribs 4: Grid-patterned ribs 5: Thin-walled section 6: Projection area (of the cut portion) 7: Straight ribs 8:Aperture 9: Reinforcement Ribs 10: Holding part 10M: Approximately cylindrical main body D1: Upper outer diameter of the (approximately cylindrical body) D2: Lower end outer diameter (of the roughly cylindrical main body) 11: Slit section 12: Return section 20: Cutting section 21: Guide surface 22:Top 23: Buried part 25: Side wall section 30: Cutting blade 31: Through hole 32: The First Mountain 33: The Second Yamabe h1:Protrusion height of the first mountain section h2: Difference in the height of the protruding first and second peaks W: Total width of the cutting edge w1: Width of the central area w2: Width of the end regions T: Cross-cut tape R: Roll C: Hollow core

Claims

1. A tape holder for holding a roll of cross-cut tape for wallpaper installation and for cutting the cross-cut tape unwound from the roll, A main body formed in a plate shape, A substantially cylindrical holding portion is formed projecting perpendicularly from the main surface on the front side of the main body, which rotatably supports the hollow core of the roll of the cross-cut tape and allows the roll to be attached and detached. The main body comprises a columnar cutting section formed at a position spaced apart from the holding section, projecting substantially parallel to the holding section from the main surface, and having a metal cutting blade integrally fixed to it for cutting the cross-cut tape unwound from the roll mounted on the holding section, A tape holder characterized in that the main body, the holding portion, and the cutting portion are integrally molded from synthetic resin, and the holding portion and the cutting portion are supported in a cantilevered manner on one side of the main body, with each being open.

2. A tape holder for holding a roll of cross-cut tape for wallpaper installation and for cutting the cross-cut tape unwound from the roll, A main body formed in a plate shape, A substantially cylindrical holding portion is formed projecting perpendicularly from the main surface on the front side of the main body, which rotatably supports the hollow core of the roll of the cross-cut tape and allows the roll to be attached and detached. The main body comprises a columnar cutting section formed at a position spaced apart from the holding section, projecting substantially parallel to the holding section from the main surface, and having a metal cutting blade integrally fixed to it for cutting the cross-cut tape unwound from the roll mounted on the holding section, The main body, the holding portion, and the cutting portion are integrally molded from synthetic resin, and the holding portion and the cutting portion are supported in a cantilevered manner on one side of the main body, with each being open. The tape holder is characterized in that the holding portion has a plurality of slits in its wall portion that are cut out along the axial direction from the open end portion, allowing for elastic deformation in the radial direction, and a return portion is integrally formed on at least a part of the end portion for engaging the end of the hollow core of the mounted roll, and in an unloaded natural state, the outer diameter of the return portion is formed to be larger than the inner diameter of the hollow core, while the maximum outer diameter excluding the return portion is formed to be slightly smaller than the inner diameter of the hollow core.

3. A tape holder for holding a roll of cross-cut tape for wallpaper installation and for cutting the cross-cut tape unwound from the roll, A main body formed in a plate shape, A substantially cylindrical holding portion is formed projecting perpendicularly from the main surface on the front side of the main body, which rotatably supports the hollow core of the roll of the cross-cut tape and allows the roll to be attached and detached. The main body comprises a columnar cutting section formed at a position spaced apart from the holding section, projecting substantially parallel to the holding section from the main surface, and having a metal cutting blade integrally fixed to it for cutting the cross-cut tape unwound from the roll mounted on the holding section, The main body, the holding portion, and the cutting portion are integrally molded from synthetic resin, and the holding portion and the cutting portion are supported in a cantilevered manner on one side of the main body, with each being open. The cutting portion has a roughly claw-shaped contour in a cross section perpendicular to its protruding direction, which curves outward from the holding portion and then folds back inward, and the curved surface of the contour forms a guide surface that guides the cross-cut tape unwound from the holding portion upward from the lower end of the contour, and a slit for holding the cutting blade is formed from the top of the folded portion of the contour so that the cutting edge of the cutting blade is exposed diagonally downward toward the outside away from the holding portion.

4. A tape holder for holding a roll of cross-cut tape for wallpaper installation and for cutting the cross-cut tape unwound from the roll, A main body formed in a plate shape, A substantially cylindrical holding portion is formed projecting perpendicularly from the main surface on the front side of the main body, which rotatably supports the hollow core of the roll of the cross-cut tape and allows the roll to be attached and detached. The main body comprises a columnar cutting section formed at a position spaced apart from the holding section, projecting substantially parallel to the holding section from the main surface, and having a metal cutting blade integrally fixed to it for cutting the cross-cut tape unwound from the roll mounted on the holding section, The main body, the holding portion, and the cutting portion are integrally molded from synthetic resin, and the holding portion and the cutting portion are supported in a cantilevered manner on one side of the main body, with each being open. The tape holder is characterized in that the cutting portion has a side wall portion that protrudes from the open end in the protruding direction so as to cover the corner portion in the longitudinal direction of the mounted cutting blade from the side.

5. A tape holder for holding a roll of cross-cut tape for wallpaper installation and for cutting the cross-cut tape unwound from the roll, A main body formed in a plate shape, A substantially cylindrical holding portion is formed projecting perpendicularly from the main surface on the front side of the main body, which rotatably supports the hollow core of the roll of the cross-cut tape and allows the roll to be attached and detached. The main body comprises a columnar cutting section formed at a position spaced apart from the holding section, projecting substantially parallel to the holding section from the main surface, and having a metal cutting blade integrally fixed to it for cutting the cross-cut tape unwound from the roll mounted on the holding section, The main body, the holding portion, and the cutting portion are integrally molded from synthetic resin, and the holding portion and the cutting portion are supported in a cantilevered manner on one side of the main body, with each being open. The outer contour of the main body is formed in a deformed oval shape, consisting of a first arc portion centered on the holding portion, a second arc portion centered on the cutting portion with a smaller radius than the first arc portion, and a straight line connecting the first and second arc portions in the tangential direction. The tape holder is characterized in that the radius of the first arc portion is formed to be smaller than the maximum outer radius of the roll of cross-cut tape to be mounted.

6. A tape holder for holding a roll of cross-cut tape for wallpaper installation and for cutting the cross-cut tape unwound from the roll, A main body formed in a plate shape, A substantially cylindrical holding portion is formed projecting perpendicularly from the main surface on the front side of the main body, which rotatably supports the hollow core of the roll of the cross-cut tape and allows the roll to be attached and detached. The main body comprises a columnar cutting section formed at a position spaced apart from the holding section, projecting substantially parallel to the holding section from the main surface, and having a metal cutting blade integrally fixed to it for cutting the cross-cut tape unwound from the roll mounted on the holding section, The main body, the holding portion, and the cutting portion are integrally molded from synthetic resin, and the holding portion and the cutting portion are supported in a cantilevered manner on one side of the main body, with each being open. The main body has a rib portion that is relatively thick and a thin-walled portion that is relatively thin and surrounded by the rib portion. The aforementioned rib portion is The outer peripheral ribs are formed around the entire circumference of the outer contour of the main body, The grid-like ribs formed on the main surface of the main body, A tape holder characterized by including a linear rib on the back surface of the main body that extends from the projection area of ​​the cutting portion toward the vicinity of the holding portion.

7. A tape holder for holding a roll of cross-cut tape for wallpaper installation and for cutting the cross-cut tape unwound from the roll, A main body formed in a plate shape, A substantially cylindrical holding portion is formed projecting perpendicularly from the main surface on the front side of the main body, which rotatably supports the hollow core of the roll of the cross-cut tape and allows the roll to be attached and detached. The main body comprises a columnar cutting section formed at a position spaced apart from the holding section, projecting substantially parallel to the holding section from the main surface, and having a metal cutting blade integrally fixed to it for cutting the cross-cut tape unwound from the roll mounted on the holding section, The main body, the holding portion, and the cutting portion are integrally molded from synthetic resin, and the holding portion and the cutting portion are supported in a cantilevered manner on one side of the main body, with each being open. The cutting blade has a sawtooth-shaped cutting edge formed along its longitudinal direction. The cutting edge has a plurality of first peaks arranged in the central region and a plurality of second peaks arranged in the longitudinal end regions, A tape holder characterized in that the height of the second peak is formed to be higher than the height of the first peak.

8. A tape holder for holding a roll of cross-cut tape for wallpaper installation and for cutting the cross-cut tape unwound from the roll, A main body formed in a plate shape, A substantially cylindrical holding portion is formed projecting perpendicularly from the main surface on the front side of the main body, which rotatably supports the hollow core of the roll of the cross-cut tape and allows the roll to be attached and detached. The main body comprises a columnar cutting section formed at a position spaced apart from the holding section, projecting substantially parallel to the holding section from the main surface, and having a metal cutting blade integrally fixed to it for cutting the cross-cut tape unwound from the roll mounted on the holding section, The main body, the holding portion, and the cutting portion are integrally molded from synthetic resin, and the holding portion and the cutting portion are supported in a cantilevered manner on one side of the main body, with each being open. The tape holder is characterized in that the cutting blade is a rectangular, thin plate-like member made of spring stainless steel with a thickness of 0.15 mm or more and 0.25 mm or less.

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