Cut tape core for wallpaper glue application

Abstract

To provide a cut tape core for mounting on a wall paper pasting machine which can arbitrarily change core width, and which can cope with the case where a cut tape having smaller width than before is used.SOLUTION: A cut tape core holds a roll of a cut tape being fitted inside an axial core tube, and has a substantially cylindrical outer shape which includes an insertion hole where a tape core rod mounted on a wall paper pasting machine is inserted rotatably. The cut tape core includes: a first annular member and a second annular member of the same outer diameter with each other; and engagement means which engages these first and second annular members, in a releasable manner, in an opposing state in the same central axis direction with each other, and which forms one substantially cylindrical outer shape. Each of the first and second annular members includes: a tubular body; a partition wall extending to the inside from an inner periphery of the tubular body; and an insertion hole part provided coaxially with a tubular body central axis at the partition wall and for forming the insertion hole. The engagement means engages the first and second annular members, in a changeable manner, at least at two different interval positions along the same central axis direction of each other.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a cutting tape core that is fitted onto the axial core tube of a roll of cutting tape for cutting wallpaper overlaps to hold the cutting tape roll and supports the cutting tape roll in a wallpaper pasting machine so that it can be unwound using an incorporated mounting mechanism. More specifically, the present invention relates to a cutting tape core whose core width can be freely changed depending on the width of the cutting tape used. [Background technology]

[0002] Generally, the work of attaching wall coverings to interior walls in building interior construction is carried out on-site using a dedicated wallpaper pasting machine, which continuously applies glue to the backside of the sheet-like wall covering. As shown in Figures 8 and 9, this wallpaper pasting machine is used by placing a pasting machine body 110, which is mainly composed of an upper structure 111 and a lower structure 112, both of which have multiple rollers arranged inside, on a base 120 supported at a predetermined height by a pair of left and right legs 121 via left and right hinges 122. While the sheet-like wall covering material (hereinafter also referred to as cloth) C sandwiched between the upper structure 111 and the lower structure 112 of the gluing machine main body 110 is sent out from the rear to the front of the gluing machine main body 110 by each roller, the glue in the glue tank 113 is scooped up by the glue pick-up roller 114 journaled on the glue tank 113 in the lower structure 112 and transferred to the gluing roller 115, and the glue is applied to the backside of the cloth by this gluing roller 115.

[0003] Wallpaper gluing machines are available in both manual and automatic types. An example of the specific gluing procedure is as follows: First, the leading end of the cloth C unwound from the raw cloth roll R is placed on the lower structure 112 so that it hangs down in front of the gluing machine main body 110, and then the upper structure 111 is closed to sandwich the cloth C between the specified rollers of the upper and lower structures, thereby obtaining the cloth C in a set state before gluing begins.

[0004] In manual devices, when an operator manually holds the tip of the cloth hanging down from the front of the gluing machine body and pulls it forward, some of the rollers rotate in response, and other rollers rotate in conjunction via gears. In automatic devices, a specific roller, whose shaft is connected to a drive source such as an electric motor, is rotated by the drive source, and other rollers rotate in conjunction via gears. The glued cloth C is sent forward along the curved surfaces of the leveling roller 116 and the claws attached to the claw stay 117.

[0005] This type of wallpaper gluing machine is used on construction sites, where wall coverings with glue applied to the backside are cut to the appropriate length and then attached to the wall by workers. In this application process, when joining two adjacent wall coverings on a wall, the edges of the wall coverings are usually overlapped, and the two wall coverings are simultaneously cut with a blade at approximately the center of the overlap before the glue dries.

[0006] After cutting, the cut edge of the upper wall covering is peeled off from the surface of the lower wall covering, and the end of the main body of the upper wall covering is turned up once to peel off the cut edge of the lower wall covering from the wall surface, and the edge of the main body of the upper wall covering is attached to the wall surface where the cut edge of the lower wall covering was located. This results in the remaining main body parts of the two adjacent wall coverings being continuously joined together at their cut edges. This installation method is called "lap cutting" and is commonly used as a wall covering attachment method.

[0007] When using this "overlap cutting" construction method, in order to make it possible to easily peel off the separated edges of the upper and lower wall coverings after cutting without excess glue adhering to the surface of the edge of the lower wall covering, cutting tape is pre-laminated along the longitudinal direction of the wall covering on the back side of the glued wall covering placed on the top. This cutting tape also makes it possible to maintain the adhesive strength of the glue on the edge of the wall covering layered on top.

[0008] Such overlapping cutting tape T is commonly sold commercially as a roll product in which an extremely thin vinyl tape such as polyethylene is wound around a roll core tube (paper tube) P. Normally, the application of cutting tape to a wall covering is carried out in parallel with the application of glue to the wall covering, so the rolled cutting tape (hereinafter also referred to as a tape roll) TR is supported by a tape mounting mechanism so that it can be fed into a wallpaper gluing machine.

[0009] The mounting mechanism for this tape roll TR first holds the tape roll TR using a cut tape core 200 that fits into the axial core tube P of the tape roll TR, as shown in Figure 10, and then supports the cut tape core 200 below the base portion 120 so that it can rotate freely (see, for example, Patent Document 1).

[0010] Specifically, the cutting tape core 200 is a plastic member having a cylindrical body 201 with a width equal to that of the cutting tape T and a through-hole 202 formed concentrically along its central axis. A tape core rod 130 having a screw shank 131 at its tip for screw fixing to a wallpaper pasting machine is rotatably inserted through the through-hole 202. In practice, a tubular member 203 constituting the through-hole 202 is integrally formed with the cylindrical body 201 so as to penetrate a partition wall 204 extending inward from the inner periphery of the cylindrical body 201. The tape attachment mechanism is mainly composed of the cutting tape core 200, the tape core rod 130, and a tape core rod attachment piece 125 extending downward from one of the hinge portions 122 on the back surface of the base portion 120 (see, for example, Patent Document 2). The tape core rod mounting piece 125 has a tape core rod mounting hole 126 drilled therein, into which a threaded shaft portion 131 of the tape core rod 130 is fastened and fixed by a wing nut serving as a fixing screw 132 that threadably engages with the tape core rod mounting piece 125 .

[0011] Typically, the tape roll TR held on the cut tape core 200 is rotatably sandwiched on both left and right sides by a pair of tape side plates (140A, 140B) on both sides of the cut tape core 200. A through hole 141 is formed in the center of the tape side plates (140A, 140B), and the tape side plates (140A, 140B) are screwed to the tape core rod 130 with the tape core rod 130 passing through the through hole 141 and the insertion hole 202 of the cut tape core 200. As a result, the tape roll TR is rotatably sandwiched on both left and right sides by the tape side plates (140A, 140B), so that the tape roll TR is stably held on the tape core rod 130 without swaying left and right when the cut tape T is unwound. Therefore, wallpaper gluing machines often come with components for mounting mechanisms for the tape roll TR.

[0012] To actually set the cut tape T in the wallpaper gluing machine, first, the cut tape core 200 is inserted into the core tube P of the tape roll and fitted, and then the tape core rod 130 is inserted into the insertion hole 202. Then, the pair of tape side plates (140A, 140B) sandwich the cut tape core 200 and the tape roll TR while the tape core rods 130 protruding from both sides of the cut tape core 200 are passed through the through holes 141 in the center of each. Then, each tape side plate (140A, 140B) is fastened to the tape core rod 130 at the outer protrusions 142 around the through holes using thumb screws 143 or the like. This allows the tape roll TR to be rotatably held on the tape core rod 130 via the cut tape core 200.

[0013] The pair of tape side plates (140A, 140B) are usually identical in shape and interchangeable with each other. Each through-hole 141 in the tape side plates (140A, 140B) is provided by a cylindrical member 144 that passes through the center of the tape side plate (140A, 140B), and an outer protrusion 142 is integrally formed around this cylindrical member 144 on the outside of each tape side plate (140A, 140B). Furthermore, a circular ring 145 that protrudes a few millimeters in height is formed concentrically around the cylindrical member 144 on the inner surface of the tape side plates (140A, 140B), and the inner diameter of both ends of the cylindrical body 201 of the cut tape core 200 is matched to the outer diameter of this circular ring 145. Therefore, by fitting the end of the cut tape core 200 onto the outer periphery of this annular portion 145, it is possible to easily align the axis when sandwiching the tape roll TR between the tape side plates (140A, 140B).

[0014] On the other hand, the tape core rod mounting hole 126 of the tape core rod mounting piece 125 on the base part 120 side has a vertically elongated shape, and its bottom end forms a fixed recess 127 with an inner diameter into which the threaded shank 131 of the tape core rod 130 fits. As described above, the tape core rod 130, which rotatably holds the tape roll TR via the cut tape core 200, is oriented parallel to the central axis of each roll in the gluing machine main body 110, and its threaded shank 131 is inserted from the inside into the tape core rod mounting hole 126 of the tape core rod mounting piece 125, and further fitted into the bottommost fixed recess 127. A fixing screw 132, for example a wing nut, is screwed onto the tip of the threaded shank 131 protruding outward from the bottommost fixed recess 127 of this tape core rod mounting hole 126 and tightened. This causes the screw shaft 131 to be screwed into the fixing recess 127, and the tape core rod 130 is fixed at one end to the tape core rod mounting piece 125, resulting in the tape roll TR being supported by the wallpaper pasting machine.

[0015] Before actual use, the leading edge of the cut tape T is unwound from the tape roll TR to the front of the gluing machine main body 110, passed rearward from the front of the glue tank through the gap between the glue tank 113 and the claw stay 117, passed along the leveling roller 116, and then pulled forward again onto the claw stay 117. The portion that abuts against the front of the glue tank 113 is housed within a tape guide 118 inserted above the front of the glue tank 113, and setting is completed when the cut tape T is unwound along this tape guide 118. This tape guide 118 ensures that the cut tape T is unwound at a constant position without swaying left or right.

[0016] After the setting of the cutting tape T is complete, when the cloth C is set in the gluing machine main body 110 as described above, the back edge of the cloth C overlaps with the cutting tape T on the leveling roller 116. Therefore, when the gluing operation of the wallpaper gluing machine is started, the cutting tape T is also unwound from the tape roll RT following the cloth C being discharged from the front of the gluing machine main body 110, and as the gluing operation of the wallpaper gluing machine progresses, the cutting tape T is automatically adhered to the back surface of the glued cloth on the leveling roller 116, and is discharged together with the cloth C to the front of the gluing machine main body 110. In other words, the glued cloth C is discharged from the front of the gluing machine main body 110 with the cut tape T automatically laminated to the back edge along its length. [Prior art documents] [Patent documents]

[0017] [Patent Document 1] Patent Publication No. 2021-24218 [Patent Document 2] Utility Model Registration No. 3169399 Summary of the Invention [Problem to be solved by the invention]

[0018] Commercially available cutting tapes are standardized products with a fixed width, and until now, widths of 35mm to 45mm have been the norm for overlap cutting. Therefore, since the cutting tape used is a product with a fixed width to a certain extent, it was only necessary to prepare a cutting tape core that corresponds to that width for the wallpaper glue applicator.

[0019] However, in recent years, the mainstream widths of cutting tape have shifted to 25mm, 30mm, 35mm, and widths of less than 35mm. This is because the cross ends that are cut off from the wallpaper body during overlap cutting have become thinner to reduce waste, and as a result, there is a demand for a smaller width for the cutting tape that is cut off along with the cross ends.

[0020] However, if the cutting tape cores attached to existing wallpaper gluers are only the conventional 45mm wide, and cutting tape widths of 35mm or less are used to apply wallpaper, it becomes necessary to prepare cutting tape cores of the corresponding width separately.One idea to address this is to attach the corresponding cutting tape cores to the cutting tape product, but if cutting tape of the same width is used each time overlapping cutting is performed on site, only one cutting tape core of that width would be required, resulting in a huge amount of waste.

[0021] In view of the above problems, the object of the present invention is to provide a cutting tape core for attachment to a wallpaper pasting machine, the core width of which can be arbitrarily changed according to the width of the cutting tape used, and which can be used even when a cutting tape of a smaller width than conventional widths is used. [Means for solving the problem]

[0022] In order to achieve the above object, the cutting tape core for attachment to a wallpaper pasting machine according to the invention described in claim 1 is a cutting tape core having a substantially cylindrical outer shape, which is fitted into the inside of a core tube around which a cutting tape is wound in a roll to be applied to the edge of the back surface of a wall covering for overlap cutting, and which holds the roll of cutting tape, and which has an insertion hole through which a tape core rod releasably attached to the wallpaper pasting machine can be rotatably inserted; The cutting tape core comprises a first annular member and a second annular member having the same outer diameter, and an engaging means for releasably engaging the first annular member and the second annular member in a state where they face each other in the same central axial direction to form the substantially cylindrical outer shape; each of the first annular member and the second annular member includes a tubular main body, a partition wall extending inward from an inner periphery of the tubular main body, and an insertion hole portion provided in the partition wall coaxially with a central axis of the tubular main body, the insertion hole forming the insertion hole through which the tape core rod is inserted; The engaging means engages the first annular member and the second annular member in a changeable manner at at least two different interval positions along the same central axis direction. the law of nature, The engagement means is a plurality of engaging posts extending from the partition wall of at least one of the first annular member and the second annular member in a direction substantially parallel to the central axis of the tubular body and having protrusions protruding from a side surface of a tip end of each engaging post are provided around the insertion hole; and at least one of the first annular member and the second annular member is provided with a plurality of engaging hole groups, each of which is formed around the insertion hole portion of the partition wall and configured to receive and engage with the opposing engaging pillars, the plurality of engaging hole groups being the same as the engaging pillars; The plurality of engagement hole groups each have the same type and number of engagement holes arranged in the same order and at the same angular intervals, and each engagement hole group can simultaneously receive each of the plurality of engagement posts on the side facing one engagement hole of the same type, and the first annular member and the second annular member are arranged so that the engagement holes to receive the engagement posts can be arbitrarily selected by relative rotation in opposite directions around the same central axis, Each of the engagement holes constituting the engagement hole group has a hook portion that hooks the protrusion when the opposing engagement post is received therein, thereby forming an engagement state between the first annular member and the second annular member, and the hook portion is located at a different position from the other along the receiving direction of the engagement post. It is characterized by:

[0024] Claim 2 The cutting tape core for attachment to a wallpaper pasting machine according to the invention described in claim 1 In the cutting tape core described in , the first annular member and the second annular member have the same shape that can be molded using the same mold, the first annular member and the second annular member have the same shape and are each provided with the plurality of engagement posts and the plurality of engagement hole groups, and form the engagement state by facing each other in a direction in which the engagement posts butt against each other, Each of the engagement posts on one side is received in one engagement hole for each of the other engagement hole groups, and the protrusion of the engagement post is engaged by the engaging portion, while each of the other engagement posts is received in one engagement hole of the same type as the other for each of the one engagement hole groups, and the protrusion of the engagement post is engaged by the engaging portion.

[0025] Claim 3The cutting tape core for attachment to a wallpaper pasting machine according to the invention described in claim 1 23. In the cutting tape core described in 22, each of the engagement hole groups has three engagement holes, namely, a first engagement hole, a second engagement hole, and a third engagement hole; The width of the cut tape core in each engagement state formed by engaging the protrusion of the engagement pillar with the engaging portion at different positions in the first engagement hole, the second engagement hole, and the third engagement hole is characterized by being available in three types: 25 mm, 30 mm, and 35 mm.

[0026] Claim 4 The cutting tape core for attachment to a wallpaper pasting machine according to the invention described in claim 1 ~ 3 In the cutting tape core described in any one of the above, the first annular member and the second annular member each have a plurality of grooves formed along the central axis direction of the tubular body around the entire outer surface of the tubular body.

[0027] Claim 5 The cutting tape core for wallpaper pasting machine according to the invention described in A cutting tape core having a substantially cylindrical outer shape and an insertion hole through which a tape core rod releasably attached to a wallpaper pasting machine can be rotatably inserted, the cutting tape core being fitted into the inside of a core tube around which a cutting tape is wound in a roll to be attached to the edge of the back surface of a wall covering for overlap cutting of the wall covering, The cutting tape core comprises a first annular member and a second annular member having the same outer diameter, and an engaging means for releasably engaging the first annular member and the second annular member in a state where they face each other in the same central axial direction to form the substantially cylindrical outer shape; each of the first annular member and the second annular member includes a tubular main body, a partition wall extending inward from an inner periphery of the tubular main body, and an insertion hole portion provided in the partition wall coaxially with a central axis of the tubular main body, the insertion hole forming the insertion hole through which the tape core rod is inserted; the engaging means variably engages the first annular member and the second annular member at at least two different interval positions along the same central axis direction, the first annular member and the second annular member have the same shape that can be molded using the same mold, and each of the first annular member and the second annular member includes two or more inner wall portions extending from the partition wall on concentric circles inside the tubular body; the tubular body comprises two or more body wall portions having the same arc length and spaced apart at equal angular intervals; The inner wall portions are arranged alternately with the main body wall portions so as to fill in the inner regions of the missing arc regions between the main body wall portions, the main body wall portions of the first annular member are overlapped on the outside of the inner wall portions of the opposing second annular member, and simultaneously the main body wall portions of the second annular member are overlapped on the outside of the inner wall portions of the first annular member, and are slidable in directions toward and away from each other along a central axis, The engagement means is two or more parallel engaging grooves having the same groove width are formed on the outer surfaces of the main body wall portions of the first annular member and the second annular member at different positions in the central axis direction and around the entire circumference of the tubular main body, and the engaging grooves of the first annular member and the engaging grooves of the second annular member are arranged on the same circumference at two predetermined different intervals in the central axis direction between the first annular member and the second annular member, The device is characterized in that it further comprises an elastic ring that fits into the engagement groove of the first annular member and the engagement groove of the second annular member that are aligned on the same circumference, thereby fixing the engagement state between the first annular member and the second annular member. [Effects of the Invention]

[0028] According to the cutting tape core of the present invention, a cutting tape core is formed when the first annular member and the second annular member are engaged at at least two different intervals, which has the advantage that the width of the cutting tape core can be changed as desired to suit the width of the cutting tape being used. Therefore, by setting the changeable width of the cutting tape core to correspond to the cutting tape widths that have become mainstream in recent years, the cutting tape core of the present invention can hold rolls of cutting tape of different widths than conventional ones, and can be incorporated into existing mounting mechanisms and attached to wallpaper pasting machines so that the tape can be easily fed out. [Brief explanation of the drawings]

[0029] [Figure 1]1A and 1B are schematic diagrams of a cutting tape core according to one embodiment of the present invention, in which (a) is an exploded view showing the components of the attachment mechanism, and (b) is an enlarged view showing the cutting tape core in (a) in a disengaged state. [Figure 2] 2A and 2B are schematic side views showing different core widths of the cut tape core of FIG. 1, where (a) shows the maximum width of 35 mm, (b) shows the intermediate width of 30 mm, and (c) shows the minimum width of 25 mm. [Figure 3] 2A and 2B are schematic diagrams of the first and second annular members constituting the cut tape core of FIG. 1, where (a) is a front view, (b) is a rear view, (c) is a side view, (d) is an LL cross-sectional view of (a), and (e) is a perspective view. [Figure 4] These are cross-sectional views showing the respective hooking portions of the first engagement hole, the second engagement hole, and the third engagement hole, where (a) is the α-α cross-section of Figure 3(b), (b) is the β-β cross-section of Figure 3(b), and (c) is the γ-γ cross-section of Figure 3(b). [Figure 5] 2 is a schematic diagram of a cutting tape core as a modified example different from the embodiment of FIG. 1. FIG. [Figure 6] 6A to 6B are schematic diagrams of a cutting tape core having an engaging means with a different mechanism from that of the cutting tape core shown in FIGS. 1 to 5, where (a) is a perspective view showing the engaged state, and (b) is an exploded view showing the disengaged state. [Figure 7] 6(a) is a schematic oblique view showing the engagement state at core widths different from the core width of the cut tape core in FIG. 6(a) with the elastic ring omitted, where (a) shows the engagement state at the first core width, which is the smallest width; (b) shows the engagement state at the second core width, which is the next smallest width; (c) shows the engagement state at the fourth core width, which is wider than FIG. 6(a); and (d) shows the engagement state at the fifth core width, which is the largest width. [Figure 8] This is a schematic diagram of a wallpaper pasting machine in which a roll of cutting tape is attached using the cutting tape core of this embodiment, showing the roll attached by the mounting mechanism, (a) is a front view and (b) is a side view. [Figure 9] 9 is an explanatory diagram showing the internal structure of the main body of the wallpaper pasting machine of FIG. 8 with the cutting tape attachment mechanism removed. [Figure 10]1A and 1B are schematic diagrams illustrating a conventional cutting tape core, where (a) is an exploded view of the attachment mechanism, (b) is an enlarged view of the cutting tape core in (a), (c) is a longitudinal cross-sectional view of the cutting tape core in (b), and (d) is an oblique view showing the inner surface of the tape side plate in (a). DETAILED DESCRIPTION OF THE INVENTION

[0030] The cutting tape core for attachment to a wallpaper pasting machine according to the present invention comprises a first annular member and a second annular member having the same outer diameter, and an engagement means for releasably engaging the first annular member and the second annular member in an opposing state in the direction of the same central axis to form the single, approximately cylindrical outer shape, wherein the first annular member and the second annular member each comprise a tubular body, a partition wall extending inward from the inner circumference of the tubular body, and an insertion hole portion in the partition wall coaxial with the central axis of the tubular body, which forms the insertion hole through which the tape core rod is inserted, and the engagement means variably engages the first annular member and the second annular member at at least two different spacing positions along the direction of the same central axis.

[0031] With the above-described configuration, the cutting tape core of the present invention can engage the first and second annular members at different intervals using the engagement means, allowing the length of the central axis of the single, substantially cylindrical outer shape formed by the first and second annular members, as the width of the cutting tape core, to be changed. Therefore, by appropriately setting the variable interval between the first and second annular members, at least two different core widths corresponding to at least two different cutting tape widths, including the cutting tape width that has become mainstream in recent years, can be freely changed. Therefore, the first and second annular members can be engaged at an interval that results in a cutting tape core with a core width corresponding to the width of the cutting tape used on-site.

[0032] Specific examples of the mechanism of the engaging means of the present invention include the following: At least one of the first annular member and the second annular member is provided around the insertion hole with a plurality of engaging posts extending from the partition wall in a direction substantially parallel to the central axis of the tubular body and having protrusions protruding from the side surfaces of the distal ends thereof, and at least the other of the first annular member and the second annular member is provided with a plurality of engaging hole groups, each group consisting of two or more engaging holes formed around the insertion hole of the partition wall, for receiving and engaging the opposing engaging posts, the plurality of engaging hole groups being the same number and type of engaging holes arranged in the same order among the plurality of engaging hole groups. and are arranged at the same angular intervals, and each engagement hole group can simultaneously receive each of the multiple engagement posts on the side facing one engagement hole of the same type, and the first annular member and the second annular member are arranged so that the engagement hole to receive the engagement post can be arbitrarily selected by relative rotation in opposite directions around the same central axis, and each engagement hole that makes up the engagement hole group has a hooking portion at a different position along the receiving direction of the engagement post, which hooks the protrusion when the opposing engagement post is received, thereby forming an engagement state between the first annular member and the second annular member.

[0033] With the engagement means configured as described above, the distance between the first and second annular members that can be engaged varies depending on which of the engagement holes the engagement posts are inserted into, and the length of the substantially cylindrical outer shape formed by the first and second annular members along the central axis, which corresponds to the width of the cutting tape core, varies. Therefore, by arbitrarily selecting the engagement holes into which the engagement posts are inserted that provide the desired core width and engaging the first and second annular members, a cutting tape core with a core width corresponding to the width of the cutting tape used on-site can be obtained. Therefore, by simply appropriately adjusting the tubular bodies of the first and second annular members, the engagement posts, and the positions of the hooks of each engagement hole, at least two different core widths can be freely adjusted to correspond to at least two cutting tape widths, including the cutting tape widths that have become mainstream in recent years.

[0034] The engagement of the engagement posts with the engagement holes is achieved by the engagement of the protrusions with the latching portions. However, by using a material with some elasticity, such as a plastic molded product, the elasticity can be utilized to insert and remove the engagement posts into and from the engagement holes, and to latch and release the protrusions from the latching portions. For example, the inner diameter of each engagement hole can be made to match the outer diameter of the engagement post from the front to the rear along the insertion direction of the engagement post, and the inner diameter can be expanded from the latching portion toward the rear. As a result, when the engagement post is inserted into the engagement hole and pushed in, the protrusion at its tip pushes the inner wall of the engagement hole wider as it moves deeper. Then, when the protrusion overcomes the latching portion and reaches the expanded diameter region of the latching portion, the inner wall of the engagement hole returns inward from the expanded state, holding the outer periphery of the engagement post, and the protrusion is latched and held by the latching portion so that movement in the withdrawal direction is restricted, thereby achieving the engaged state. Furthermore, if the projection is pulled slightly harder in the direction of removal from the engaging portion while it is still engaged with the engaging portion, the elasticity of the member will cause the projection to disengage from the engaging portion and push against the inner wall of the engaging hole, returning to the front.Finally, the engaging projection is removed from the engaging hole, and the engagement between the first annular member and the second annular member is released.

[0035] Furthermore, because the same types of engagement holes are arranged in the same order and at the same angular intervals in each engagement hole group, the first and second annular members can be rotated relative to each other around the same central axis, one clockwise and the other counterclockwise, by a predetermined angle, to select an engagement hole that will achieve the desired engagement interval, i.e., the desired core width, and then the engagement posts can be inserted to achieve the desired engagement state. Furthermore, to change the core width of the cutting tape core, simply disengage the first and second annular members, rotate them relative to each other, and insert and latch the engagement posts into different engagement holes to achieve a different core width.

[0036] Furthermore, because the cutting tape core of the present invention is composed of two separate components, the first and second annular members, each can be easily manufactured as a molded product using a mold. By making the first and second annular members identical in shape, mass production using a single mold can be achieved at low cost and efficiently. Because the first and second annular members have identical shapes, they can be easily replaced with each other, making them easy to deal with when a component is lost, for example, when used as an accessory for a wallpaper pasting machine. For example, if a set of two components is used as an accessory and one is lost, simply replacing it with another component of the same type allows the cutting tape core to be re-formed. Alternatively, if three of the same components are prepared in advance, even if one is lost, the remaining two can be used to form the same type of cutting tape core without any problems.

[0037] In the engagement means configured as described above, when the first and second annular members have the same shape, each of the first and second annular members has a plurality of engagement posts and a plurality of engagement hole groups, and the engagement posts face each other in abutting directions to form an engagement state. In this case, each of the engagement posts on one side is received in one of the engagement hole groups on the other side, with the protrusions of the engagement posts engaged in the engaging portions, and simultaneously each of the other engagement posts is received in one of the same type of engagement hole groups on the other side, with the protrusions of the engagement posts engaged in the engaging portions. This provides a more reliable and stable engagement state than an engagement state in which the engagement posts of one of the first and second annular members are simply engaged in the engagement holes of the other side.

[0038] The cut tape core, consisting of the first and second annular members equipped with the above-described engaging means, has the multiple concave and convex portions necessary for engagement, but can be easily manufactured as separate components from thermoplastic resin as a single unit using a mold. In this case, the thermoplastic resin can be a versatile material that has mechanical strength and moderate elasticity, such as ABS resin or polypropylene, allowing for low-cost manufacturing.

[0039] While two or more engagement holes in each engagement hole group would allow for at least two different core widths, it is currently more practical to accommodate the three mainstream tape widths. Therefore, if each engagement hole group has three engagement holes—a first engagement hole, a second engagement hole, and a third engagement hole—each with a different position of the engagement portion in the engagement post receiving direction, the engagement gap between the first annular member and the second annular member when the engagement posts engage with each engagement hole can be set to three levels: maximum, intermediate, and minimum. Therefore, depending on the engagement gap at each level, the width of the cut tape core formed by the first and second annular members can be set to three levels: maximum, intermediate, and minimum. Therefore, by setting these to 35 mm, 30 mm, and 25 mm, respectively, a core width can be freely selected to match the mainstream cut tape widths in recent years.

[0040] Therefore, if a cutting tape core comprising a set of a first annular member and a second annular member is provided as an accessory for a wallpaper pasting machine, it can accommodate multiple types of narrow cutting tape, which have become mainstream in recent years, eliminating the need to prepare cutting tape cores for each cutting tape of a different width. With this cutting tape core of the present invention, when setting up the wallpaper pasting machine to glue wallpaper at the wallpaper installation site, it is sufficient to form a single cutting tape core by engaging the first annular member and the second annular member so that the core width corresponds to the width of the cutting tape being used. This allows the tape roll to be attached to the wallpaper pasting machine in a manner similar to conventional procedures, using an attachment mechanism consisting of the same accessories as conventional ones, in a manner similar to conventional procedures, so that the tape roll can be unwound.

[0041] Furthermore, the cut tape core of the present invention, consisting of separate first and second annular members, can accommodate cut tape of a width greater than the maximum width when the first and second annular members are engaged, even in a disengaged state. That is, even when the disengaged first and second annular members are simply fitted into the cut tape core tube from both sides, a tape core rod can be inserted through the insertion holes of both annular members. Therefore, by sandwiching a tape roll between the pair of tape side plates and screwing each tape side plate to the tape core rod, the tape roll can be rotatably attached to the cut tape core. Therefore, even when the maximum core width when the first and second annular members are engaged is set to 35 mm, the disengaged first and second annular members can accommodate conventional 45 mm-wide cut tape rolls.

[0042] As mentioned above, when the first annular member and the second annular member are rotated relative to each other to change the core width of the cutting tape core, or when the two annular members are engaged or disengaged, it is generally expected that the worker will grasp the outer surfaces of the tubular bodies of the first annular member and the second annular member with the fingers of each hand to handle them.Therefore, if multiple grooves are formed along the central axis direction of the tubular body around the entire outer surface of each tubular body, they will act as a non-slip grip for the grasping fingers, making them easier to handle.

[0043] Furthermore, it is desirable that at least the partition wall between the first annular member and the second annular member, where the engagement holes are formed, has a thickness greater in the inner peripheral region where the engagement holes are formed around the insertion holes than in the outer peripheral region thereof. This thickness ensures that each engagement hole has a sufficient length to form a hook portion at a different position along the insertion direction of the engagement post.

[0044] However, when the first annular member and the second annular member have the same shape and a thick inner circumferential region in which a group of engagement holes is formed is provided in the partition wall of both members, the height of this inner circumferential region toward the engagement side is set to a height that does not interfere with the engagement state between the first annular member and the second annular member at the shortest distance even when the tip surfaces of the inner circumferential regions abut against each other.

[0045] Furthermore, when the first annular member and the second annular member are engaged at the shortest distance, if the tip surfaces of the inner peripheral regions of each member butt against each other, the engagement posts are prevented from penetrating deeper into the inserted engagement holes than in that engaged state, and at the same time, the thick inner peripheral regions that butt against each other function as ribs that increase the axial mechanical strength of the cut tape core.

[0046] Furthermore, each engaging post may be provided with a rib post that protrudes from the outer circumferential region of the partition wall, extending from the outer circumferential rear side of the engaging post to provide mechanical strength in the protruding direction to prevent slight bending or flexing of the engaging post. This rib post is also of a height that does not impede the engagement between the first and second annular members at the shortest distance even if it butts against the outer circumferential region of the opposing partition wall.

[0047] The engagement means for the cutting tape core of the present invention is not limited to the above-mentioned hooking mechanism between the engagement posts and engagement holes, but other mechanisms are also possible. For example, a mechanism is possible in which the first and second annular members have overlapping portions that can slide toward and away from each other along the central axis, and the two annular members are fixed to each other with an engagement member at a sliding position where the distance between the first and second annular members corresponds to a predetermined core width, thereby achieving an engaged state.

[0048] A specific configuration of this engagement means is such that a first annular member and a second annular member having the same shape that can be molded using the same mold each include two or more inner wall portions extending from the partition wall on concentric circles inside the tubular body, the tubular body being made of two or more main body wall portions having the same arc length that are arranged intermittently at equal angular intervals, the inner wall portions being arranged alternately with the main body wall portions so as to fill in the inner regions of each missing arc region between the main body wall portions, and each of the main body wall portions of the first annular member is overlapped on the outside of each of the inner wall portions of the opposing second annular member, and at the same time, each of the main body wall portions of the second annular member is overlapped on the outside of each of the inner wall portions of the first annular member, and the first and second annular members are slidable in directions toward and away from each other along a central axis. and two or more parallel engagement grooves having the same groove width are formed on the outer surfaces of the main body wall portions of the first annular member and the second annular member at different positions in the central axis direction and around the entire circumference of the tubular body, and the engagement grooves of the first annular member and the second annular member are arranged at two predetermined different intervals in the central axis direction between the first annular member and the second annular member so that at least one groove of one annular member and at least one groove of the other annular member are aligned on the same circumference, and the device further includes an elastic ring that fits into the engagement groove of the first annular member and the engagement groove of the second annular member that are aligned on the same circumference, thereby fixing the engagement state of the first annular member and the second annular member.

[0049] In a cutting tape core having the above configuration, the engagement state between the identically shaped first cylindrical member and second annular member, which determines the core width of the cutting tape core, depends on which of the two or more engagement grooves formed on the outer surfaces of the respective body walls are aligned on the same circumference, i.e., the spacing between the two cylindrical members varies depending on the combination of engagement grooves selected. Therefore, by appropriately setting the number and spacing of the engagement grooves, different types of cutting tape core widths can be obtained by varying the spacing between the first and second annular members, thereby freely changing the desired core width, for example, three different core widths corresponding to the three cutting tape widths mentioned above that have become mainstream in recent years. The first and second annular members of this configuration can also be manufactured integrally using the same mold, allowing for mass production at low cost and interchangeability as accessories. In addition, a general O-ring can be used as the elastic ring that fits into the engagement grooves that are aligned on the same circumference to fix the engagement state between the first annular member and the second annular member, as long as it matches the diameter dimension of the circumference consisting of all the engagement grooves that are fitted and the width of the engagement grooves. [Example]

[0050] As one embodiment of the present invention, a cutting tape core consisting of a first annular member and a second annular member made of the same shape and made of plastic is shown in Figures 1 to 4. Figure 1 is a schematic diagram, where (a) is an exploded view showing the components of an attachment mechanism including the cutting tape core, and (b) is an enlarged view showing the cutting tape core in (a) in a disengaged state. Figure 2 is a schematic side view of the cutting tape core 1. Figure 3 is a schematic diagram of the first and second annular members, where (a) is a front view, (b) is a rear view, (c) is a side view, (d) is a side cross-sectional view, and (e) is a perspective view. Note that the tape attachment mechanism using the cutting tape core 1 of this embodiment can commonly use conventional components attached to the wallpaper gluing machine shown in Figure 8.

[0051] The cutting tape core 1 of this embodiment is composed of two components, a first annular member 10A and a second annular member 10B, which are releasably engaged with each other, and form a single, approximately cylindrical outer shape depending on the engagement state of the two. In this embodiment, the first annular member 10A and the second annular member 10B have the same shape and are opposed to each other, forming an engagement state at three different intervals as shown in Figure 4. That is, as will be described later, three different core widths are provided: a first core width W1, a second core width W2, and a third core width W3.

[0052] The first annular member 10A and the second annular member 10B each include a tubular main body 11, a partition wall 12 extending inward from the inner circumference of the tubular main body 11, and an insertion hole portion 13 provided in the partition wall 12 coaxially with the central axis S of the tubular main body 11 and forming an insertion hole through which a tape core rod 130 is inserted.

[0053] The partition wall 12 has an inner circumferential region 14 around the insertion hole portion 13 that is thicker than its outer circumferential region 15. Three engagement posts 40 are provided in the thick inner circumferential region 14 at equal angular intervals of 120 degrees, extending in a direction substantially parallel to the central axis S of the tubular body 11. Each engagement post 40 has a projection 41 that protrudes from the side surface of its tip that faces the central axis S. Three engagement hole groups (20X, 20Y, 20Z) are formed in the inner circumferential region 14 between the engagement posts 40, one for each side, for receiving the engagement post on the opposing side. Each engagement group (20X, 20Y, 20Z) is composed of three types of engagement holes: first engagement holes 21, second engagement holes 22, and third engagement holes 23, which are arranged at equal angular intervals.

[0054] Inside the first, second and third engagement holes (21, 22, 23), latching portions (31, 32, 33) for latching the protrusions 41 of the engagement post 40 are formed at different positions along the direction in which the engagement post 40 is received. As shown in each cross-sectional view in Figure 4, the inner diameter of each engagement hole (21, 22, 23) is approximately the same as the outer diameter of the engagement post 40 except for the tip end portion where the protrusion 41 is located, from the front to the back along the insertion direction of the engagement post 40 to the latching portions (31, 32, 33), and the diameter expands from the latching portions (31, 32, 33) to the back side so that the tip end portion where the protrusion 41 is located can fit into it.

[0055] The first engagement hole 21 has a hook portion 31 at the frontmost position in the receiving and inserting direction of the engagement pillar 40 (Figure 4(a)), the second engagement hole 22 has a hook portion 32 at the middle position in the receiving and inserting direction of the engagement pillar 40 (Figure 4(b)), and the third engagement hole 23 has a hook portion 33 at the backmost position in the receiving and inserting direction of the engagement pillar 40 (Figure 4(c)).

[0056] The three engaging posts 40 of each of the first annular member 10A and the second annular member 10B are inserted into one of the engaging holes in the group of engaging holes of the opposing annular members, and each protrusion 41 is hooked onto the hook portion formed in each engaging hole, thereby achieving an engaged state between the first annular member 10A and the second annular member 10B and forming one cut tape core 1.

[0057] Therefore, when the three engaging posts 40 of each annular member (10A, 10B) are inserted into the first engaging holes 21 of the corresponding engaging hole group of the opposing annular member (10A, 10B) and the protrusions 41 are engaged with the hooking portions 31, the first annular member 10A and the second annular member 10B form an engaged state with the maximum distance between them, providing the cut tape core 1 with the maximum first core width W1 shown in FIG. 2(a). When the first annular member 10A and the second annular member 10B are hooked onto the third engagement hole 23, the first annular member 10A and the second annular member 10B form an engagement state with an intermediate gap, providing the cutting tape core 1 with the intermediate second core width W2 shown in Figure 2(b). When the first annular member 10A and the second annular member 10B are inserted into the third engagement hole 23 and the protrusion 41 is hooked onto the hooking portion 33, the first annular member 10A and the second annular member 10B form an engagement state with the minimum gap, providing the cutting tape core 1 with the minimum third core width W3 shown in Figure 2(c).

[0058] In this embodiment, the three types of first core width W1, second core width W2, and third core width W3 are designed to be 35 mm, 30 mm, and 25 mm, respectively, so that any engagement state can be selected and changed as desired to correspond to the cut tape widths that have become mainstream in recent years.

[0059] In this embodiment, the first annular member 10A and the second annular member 10B are made of plastic, and therefore, the elasticity of the plastic is utilized to insert and remove the engaging post 40 from the engaging hole, and to engage and release the protrusion from the engaging portion.

[0060] First, when the engagement state is achieved, the engagement post 40 is inserted into the engagement hole and pushed in, and the protrusion 41 at the tip thereof pushes against the inner wall of the engagement hole, moving inward, and when the protrusion 41 gets over the latching portion and reaches the enlarged diameter region of the latching portion, the inner wall of the engagement hole returns from the expanded state to the inside, holding the outer periphery of the engagement post 40. At the same time, the protrusion 41 is latched and held in place by the latching portion so that movement in the removal direction is restricted, and an engagement state between the engagement post 40 and the engagement hole, i.e., an engagement state between the first annular member 10A and the second annular member 10B, is achieved. Furthermore, if the engagement pillar 40 is pulled a little harder in the direction of pulling it out while the protrusion 41 is engaged in this engagement portion, the elasticity of the member will cause the protrusion 41 to come off the engagement portion and return to the front while pushing against the inner wall of the engagement hole, ultimately causing the engagement pillar 40 to be pulled out of the engagement hole and disengaging the engagement between the first annular member 10A and the second annular member 10B.

[0061] Therefore, when changing the core width of the cut tape core 1, since the constituent engagement holes of each engagement hole group (20X, 20Y, 20Z) are of the same type and arranged in the same order at equal angles, the first annular member 10A and the second annular member 10B are rotated relative to each other around the same central axis S, one clockwise and the other counterclockwise, by a predetermined angle, to position the engagement pillars so that they face the engagement holes that will result in the desired core width, and then the engagement pillars 40 are inserted into the engagement holes to establish an engaged state.

[0062] To prevent even slight deflection or bending of each engaging post 40, rib posts 42 are provided on the rear outer periphery of each engaging post 40 to provide mechanical strength in the direction in which the engaging posts protrude, and these rib posts 42 are continuous with the engaging posts 40 and protrude into the outer periphery region 15 of the partition wall 12. The rib posts 42 are set at a height equal to or less than that at which they abut against the outer periphery region of the opposing partition wall when the first annular member 10A and the second annular member 10B are engaged with each other at the shortest interval.

[0063] As described above, when the cut tape core 1 of this embodiment is set up at a wallpaper application site to glue the wallpaper pasting machine onto the cloth C, the first annular member 10A and the second annular member 10B are engaged so that the core width corresponds to the width of the cut tape T to be used, and the tape roll TR can be attached to the wallpaper pasting machine via the attachment mechanism in the same procedure as a conventional cut tape core.

[0064] 9, a circular ring portion 145 protruding to a height of about several millimeters is formed concentrically around the cylindrical member 144 that provides the through-hole 141 on the inner surface of the pair of tape side plates (140A, 140B) of the attachment mechanism. In contrast, in the conventional cutting tape core 200, the inner diameter of both ends of the cylindrical body 201 is made to match the outer diameter of this circular ring portion 145, and when the tape roll TR is attached, the ends of the cutting tape core 200 are fitted onto the outer periphery of this circular ring portion 145, and at this time, both ends of the cutting tape core 200 abut against the inner surfaces of the tape side plates (140A, 140B).

[0065] Therefore, when the tape roll TR is sandwiched between the pair of tape side plates (140A, 140B) and screwed to the tape core rod 130, if the side of the tape roll TR abuts against the inner surfaces of the pair of tape side plates (140A, 140B) and is pressed, the free rotation of the tape roll TR is hindered, hindering the unwinding of the cut tape T. Therefore, in the past, it was necessary to fine-tune the screw-fixing positions of the tape side plates (140A, 140B) relative to the tape core rod 130 so that the side of the tape roll TR would be free to rotate without being pressed against the inner surfaces of the pair of tape side plates (140A, 140B). This fine adjustment requires a time-consuming process of incorporating the tape roll TR into the mounting mechanism via the cut tape core 200 and mounting it on the wallpaper gluing machine.

[0066] In contrast, in the cut tape core 1 according to this embodiment, the outer end of the thick inner peripheral region 14 protrudes by only a few millimeters from the outer end of the tubular main body 11 of the first annular member 10A and the second annular member 10B. As a result, the outer end of the protruding inner peripheral region 14 of the first and second annular members (10A, 10B) of the cut tape core 1 fitted into the axle tube of the tape roll TR abuts against the end of the tubular member 144 that forms the through hole 141 of the pair of tape side plates (140A, 140B), and both end portions of the tubular main body 11 of the first and second annular members (10A, 10B) face each other with a small gap around the annular portion 145 without abutting against the inner surfaces of the pair of tape side plates (140A, 140B).

[0067] Therefore, due to this slight gap, the side of the tape roll TR sandwiched between the pair of tape side plates (140A, 140B) is not pressed against the inner surfaces of the pair of tape side plates (140A, 140B), eliminating the need for fine adjustment as described above, simplifying the process of incorporating the tape roll TR into the mounting mechanism via the cut tape core 1 and attaching it to the wallpaper pasting machine.

[0068] As described above, when changing the core width of the cutting tape core 1 according to this embodiment, first, the first annular member 10A and the second annular member 10B are pulled toward each other to release the engagement using the elasticity of the members, and then the first annular member 10A and the second annular member 10B are rotated relative to each other about the same central axis S, one clockwise and the other counterclockwise, by a predetermined angle, until the engaging posts are positioned to face the engaging holes that will provide the desired core width, and then the engaging posts 40 are pushed into the engaging holes to achieve the engagement. Therefore, the actual engagement or disengagement is performed by the operator by grasping the tubular bodies 11 of the first annular member 10A and the second annular member 10B with their fingertips.

[0069] Therefore, measures may be taken to make the first and second annular members easier to handle. For example, in the cutting tape core 50 shown in Fig. 5, which is made up of a first annular member 50A and a second annular member 50B, multiple grooves 56 are formed at equal intervals along the central axis of the cutting tape core around the entire outer surface of each tubular body 51 to prevent slippage.

[0070] Additionally, in the thick inner peripheral region 54 around the insertion hole portion 53 of the partition wall 52, the inner end portion 57 mainly constitutes the peripheral wall end portion of each engagement hole. If this inner end portion 57 has a height that causes the first annular member 50A and the second annular member 50B to butt against each other when they engage with each other at the minimum distance, friction may occur between the abutting surfaces. Therefore, the peripheral wall end portion of the inner end portion 57 is chamfered to reduce the size of the abutting surface. Other than the grooves 56 and the chamfered inner end portion 57, the basic configuration of this cut tape core 5, including the engagement posts and engagement holes, is the same as that shown in FIG. 1, and this does not affect the effect of being able to freely change the core width.

[0071] In the above embodiment, the first and second annular members are provided with three engaging posts, each with three corresponding engaging hole groups, forming a three-set configuration, but the cutting tape core of the present invention is not limited to this. For example, as long as a sufficient engagement state can be obtained, a two-set configuration of two engaging posts and two engaging hole groups, or a four-set configuration of four engaging posts and four engaging hole groups, are also possible.

[0072] Furthermore, in the above embodiment, one engagement hole group is formed by three types of engagement holes with different engagement positions for one engagement post, and three different core widths are available, but the present invention is not limited to this, and in some cases, an engagement hole group may be formed by two types of engagement holes that allow for two core widths to be selected, or by four types of engagement holes that allow for four core widths to be selected. However, for the cut tape core diameter that depends on the shaft tube diameter of current cut tape rolls, the most efficient and desirable configuration is one with three sets of three engagement posts and three engagement hole groups, with each engagement hole group consisting of three types of engagement holes, in terms of ease of manufacturing based on the dimensions of each part and ease of ensuring the strength to maintain the engagement in the engaged state.

[0073] Next, examples of cut tape cores having engaging means with mechanisms different from those shown in Figures 1 to 5 are shown in Figures 6 and 7. Figure 6 is a schematic diagram of the cut tape core 60, where (a) is a perspective view showing the engaged state and (b) is an exploded view showing the disengaged state. Figure 7 is a perspective view showing the engaged state at core widths different from the core width of the cut tape core in Figure 6(a), with the elastic ring omitted. (a) shows the engaged state at the first core width, which is the smallest width; (b) shows the engaged state at the second core width, which is the next smallest width; (c) shows the engaged state at the fourth core width, which is wider than Figure 6(a); and (d) shows the engaged state at the fifth core width, which is the largest width.

[0074] This cut tape core 60 is composed of a first annular member 60A and a second annular member 60B of the same shape that are releasably engaged with each other, and each of them has a tubular body 61, a partition wall 62 that extends inward from the inner circumference of the tubular body 61, and an insertion hole portion 63 that is arranged in the partition wall 62 coaxially with the central axis of the tubular body 61 and forms an insertion hole through which the tape core rod 130 is inserted, in that it has a basic configuration that is the same as the cut tape core shown in Figures 1 to 5 described above.

[0075] The first annular member 60A and the second annular member 60B slide in opposite directions to each other, and as described below, are configured to form an engagement state at three different intervals to provide three different core widths, as well as to provide two wider core widths equivalent to conventional cut tape widths.

[0076] The first annular member 60A and the second annular member 60B each have a tubular body 61 made up of three body wall portions 64 arranged at equal angular intervals of 120 degrees, each having the same arc length of 60 degrees, and three inner wall portions 65 extending from the partition wall 62 on concentric circles inside the tubular body 61. These inner wall portions 65 are arranged alternately with the body wall portions 64 so as to fill in the inner regions of each missing arc region between the body wall portions 64. Therefore, the three inner wall portions 65 are arranged at equal angular intervals of 120 degrees, and each have the same arc length of 60 degrees.

[0077] Each of the main body wall portions 64 of the first annular member 60A is overlapped on the outside of each of the inner wall portions 65 of the opposing second annular member 60B, and at the same time, each of the main body wall portions 64 of the second annular member 60B is overlapped on the outside of each of the inner wall portions 65 of the first annular member 60A, so that they can slide toward and away from each other along the central axis s.

[0078] On each outer surface of the main body wall portion 64 of the first annular member 60A and the second annular member 60B, three parallel engagement grooves, a first engagement groove (66Ax, 66Bx), a second engagement groove (66Ay, 66By) and a third engagement groove (66Az, 66Bz), are formed around the entire circumference of the tubular main body 61 at three different positions in the direction of the central axis s, in order from the outside to the inside of the cutting tape core 60, with the same groove width. The first to third engagement grooves (66Ax, 66Ay, 66Az) of the first annular member 60A and the first to third engagement grooves (66Bx, 66By, 66Bz) of the second annular member 60B are arranged at three different predetermined intervals in the direction of the central axis s of the first annular member 60A and the second annular member 60B, with at least one groove of one annular member and at least one groove of the other annular member being aligned on the same circumference.

[0079] 6(a), when the third engagement groove 66Az of the first annular member 60A and the third engagement groove 66Bz of the second annular member 60B are aligned on the same circumference, the distance between the first annular member 60A and the second annular member 60B is the largest of the three, and the cut tape core 60 has the third core width, which is the largest of the three basic core widths. By fitting a single elastic O-ring OR into all of the third engagement grooves (66Az, 66Bz) with these third engagement grooves (66Az, 66Bz) aligned on the same circumference, the engagement between the first annular member 60A and the second annular member 60B is fixed at the third core width.

[0080] 7(a), when the second engagement groove 66Ay of the first annular member 60A and the second engagement groove 66By of the second annular member 60B are aligned on the same circumference, the distance between the first annular member 60A and the second annular member 60B is the smallest of the three, and the cut tape core 60 has the first core width, which is the smallest of the three basic core widths. By fitting one elastic ring (O-ring) OR into all of the second engagement grooves (66Ay, 66By) with these second engagement grooves (66Ay, 66By) aligned on the same circumference, the engagement state between the first annular member 60A and the second annular member 60B is fixed at the first core width. The first to third engagement grooves (66Ax, 66Ay, 66Az), (66Bx, 66By, 66Bz) are arranged at equal intervals from each other, and when forming this first core width, the first engagement groove 66Ax of the first annular member 60A and the third engagement groove 66Bz of the second annular member 60B are aligned on the same circumference, and at the same time, the third engagement groove 66Az of the first annular member 60A and the first engagement groove 66Bx of the second annular member 60B are aligned on another parallel, same circumference.

[0081] 7(b), when the second engagement groove 66Ay of the first annular member 60A and the third engagement groove 66Bz of the second annular member 60B are aligned on the same circumference, and the third engagement groove 66Az of the first annular member 60A and the second engagement groove 66By of the second annular member 60B are aligned on the same circumference, the first annular member 60A and the second annular member 60B are positioned at an intermediate spacing among the three, and the cutting tape core 60 has a second core width that is intermediate among the three basic core widths. Therefore, by fitting an elastic ring OR into the engagement grooves aligned on one of the two concentric circles, the engagement state between the first annular member 60A and the second annular member 60B can be fixed at the second core width.

[0082] In the above configuration, by appropriately setting the positions and spacing of the first engagement grooves (66Ax, 66Bx), second engagement grooves (66Ay, 66By), and third engagement grooves (66Az, 66Bz), the three obtained core widths, i.e., the first core width, second core width, and third core width, can be made to correspond to the cutting tape widths of 25 mm, 30 mm, and 35 mm that have become mainstream in recent years. Furthermore, the first annular member 60A and the second annular member 60B have the same shape and can be molded using the same mold, so they can be attached to a wallpaper gluing machine as interchangeable members.

[0083] An even larger core width can be achieved by adding additional engagement grooves to the outer surfaces of the main body wall portions 64 of the first annular member 60A and the second annular member 60B. For example, by providing fourth engagement grooves (67A, 67B) on the open end side of the main body wall portion 64, as shown in Figure 7(c), one fourth engagement groove (67A, 67B) can be aligned with the other second engagement groove (66Ay, 66By) on the same circumference, and the engagement state can be fixed with an elastic ring OR, thereby obtaining a fourth core width that is larger than the third core width, which is the largest of the three basic core widths.

[0084] Furthermore, if the fourth engagement grooves (67A, 67B) on one side are aligned with the third engagement grooves (66Az, 66Bz) on the other side so that they are aligned on the same circumference, and the engagement state is fixed with an elastic ring OR, an even larger fifth core width can be obtained. Therefore, these fourth and fifth core widths can be made equivalent to the widths of conventional wide cutting tapes, 40 mm and 45 mm, respectively. This allows a single cutting tape core 60 consisting of a pair of first annular member 60A and second annular member 60B to be used with a variety of cutting tapes, from recent narrow types to conventional wide types. [Industrial Applicability]

[0085] The cutting tape core of the present invention can be applied not only to rolls of cutting tape, but also to various rolls of tape that are expected to be reeled out and attached to wallpaper gluing machines, such as underlayment tape or masking tape to prevent cutting into the wall surface of the lower wall covering when overlapping and cutting. [Explanation of symbols]

[0086] 1, 50, 60: Cut tape core 10A, 50A, 60A: First annular member 10B, 50B, 60B: Second annular member 11, 51, 61: Tubular body 12, 52, 62: Partition walls 13, 53, 63: Insertion hole 14,54: Inner area (partition wall) 15: Periphery area (partition wall) 20X, 20Y, 20Z: Engagement hole group 21: First engagement hole 22: Second engagement hole 23: Third engagement hole 31,32,33:Latching part 40: Engagement pillar 41: Protrusion 42: Rib column 56: Groove 57: Inner end 64: Main body wall 65:Inner wall 66Ax, 66Bx: First engagement groove 66Ay, 66By: Second engagement groove 66Az,66Bz: Third engagement groove 67A, 67B: Fourth engagement groove OR: Elastic ring (O-ring) S,s: Central axis 110: Gluing machine body 111: Upper structure 112: Lower structure 113: Glue tank 114: Glue roller 115: Glue roller 116: Smoothing roller 117: Claw stay 118: Tape Guide 120: Base 121: Legs 122: Hinge part 125: Tape core rod mounting piece 126: Tape core rod mounting hole 127: Fixed recess 130: Tape core rod 131: Screw shaft 132: Fixing screw (wing nut) 140A, 140B: Tape side plate 141:Through hole 142:Outer convex part 143: Thumb screw 144: Cylindrical member 145: Circular section 200: Cut tape core 201: Cylindrical body 202: Insertion hole 203: Tubular member 204: Partition wall C: Cross R: Cross fabric roll T: Cut tape TR: Tape roll P: Axis tube W1: First core width (maximum) W2: Second core width (middle) W3: Third core width (minimum)

Claims

1. A cutting tape core having a substantially cylindrical outer shape and an insertion hole through which a tape core rod releasably attached to a wallpaper pasting machine can be rotatably inserted, the cutting tape core being fitted into the inside of a core tube around which a cutting tape is wound in a roll to be attached to the edge of the back surface of a wall covering for overlap cutting of the wall covering, The cutting tape core comprises a first annular member and a second annular member having the same outer diameter, and an engaging means for releasably engaging the first annular member and the second annular member in a state where they face each other in the same central axial direction to form the substantially cylindrical outer shape; each of the first annular member and the second annular member includes a tubular main body, a partition wall extending inward from an inner periphery of the tubular main body, and an insertion hole portion provided in the partition wall coaxially with a central axis of the tubular main body, the insertion hole forming the insertion hole through which the tape core rod is inserted; the engaging means variably engages the first annular member and the second annular member at at least two different interval positions along the same central axis direction, The engagement means is a plurality of engaging posts extending from the partition wall of at least one of the first annular member and the second annular member in a direction substantially parallel to the central axis of the tubular body and having protrusions protruding from a side surface of a tip end of each engaging post are provided around the insertion hole; and at least one of the first annular member and the second annular member is provided with a plurality of engaging hole groups, each of which is formed around the insertion hole portion of the partition wall and configured to receive and engage with the opposing engaging pillars, the plurality of engaging hole groups being the same as the number of the engaging pillars; The plurality of engagement hole groups each have the same type and number of engagement holes arranged in the same order and at the same angular intervals, and each engagement hole group can simultaneously receive each of the plurality of engagement posts on the side facing one engagement hole of the same type, and the first annular member and the second annular member are arranged so that the engagement holes to receive the engagement posts can be arbitrarily selected by relative rotation in opposite directions around the same central axis, A cutting tape core for attachment to a wallpaper pasting machine, characterized in that each engagement hole constituting the group of engagement holes has a hooking portion at a different position from each other along the receiving direction of the engagement post, which hooks the protrusion when the opposing engagement post is received, thereby forming an engagement state between the first annular member and the second annular member.

2. the first annular member and the second annular member have the same shape that can be molded using the same mold, the first annular member and the second annular member have the same shape and are each provided with the plurality of engagement posts and the plurality of engagement hole groups, and form the engagement state by facing each other in a direction in which the engagement posts butt against each other, A cutting tape core for attachment to a wallpaper pasting machine as described in claim 1, characterized in that each of the engagement posts on one side is received in one engagement hole for each of the engagement hole groups on the other side, so that the protrusion of the engagement post is engaged in the hanging portion, and at the same time, each of the engagement posts on the other side is received in one engagement hole of the same type as the other for each of the engagement hole groups on one side, so that the protrusion of the engagement post is engaged in the hanging portion.

3. Each of the engagement hole groups includes three engagement holes, namely, a first engagement hole, a second engagement hole, and a third engagement hole, A cutting tape core for attachment to a wallpaper pasting machine as described in claim 1 or 2, characterized in that the width of the cutting tape core in each engagement state formed by engaging the protrusion of the engaging post with the hanging portion at different positions in the first engagement hole, the second engagement hole, and the third engagement hole is 25 mm, 30 mm, and 35 mm.

4. A cutting tape core for attachment to a wallpaper gluing machine as described in any one of claims 1 to 3, characterized in that the first annular member and the second annular member each have a plurality of grooves formed along the central axis direction of the tubular body around the entire outer surface of the tubular body.

5. A cutting tape core having a substantially cylindrical outer shape and equipped with an insertion hole through which a tape core rod releasably attached to a wallpaper pasting machine can be rotatably inserted, the cutting tape being attached to the edge of the backside of a wall covering for overlapping cutting of the wall covering, and fitted into the inside of a core tube wound in a roll to hold the roll of cutting tape, The cutting tape core comprises a first annular member and a second annular member having the same outer diameter, and an engaging means for releasably engaging the first annular member and the second annular member in a state where they face each other in the same central axial direction to form the substantially cylindrical outer shape; each of the first annular member and the second annular member includes a tubular main body, a partition wall extending inward from an inner periphery of the tubular main body, and an insertion hole portion provided in the partition wall coaxially with a central axis of the tubular main body, the insertion hole forming the insertion hole through which the tape core rod is inserted; the engaging means variably engages the first annular member and the second annular member at at least two different interval positions along the same central axis direction, the first annular member and the second annular member have the same shape that can be molded using the same mold, and each of the first annular member and the second annular member includes two or more inner wall portions extending from the partition wall on concentric circles inside the tubular body; the tubular body comprises two or more body wall portions having the same arc length and spaced apart at equal angular intervals; The inner wall portions are arranged alternately with the main body wall portions so as to fill in the inner regions of the missing arc regions between the main body wall portions, the main body wall portions of the first annular member are overlapped on the outside of the inner wall portions of the opposing second annular member, and simultaneously the main body wall portions of the second annular member are overlapped on the outside of the inner wall portions of the first annular member, and are slidable toward and away from each other along a central axis, The engagement means is two or more parallel engaging grooves having the same groove width are formed on the outer surfaces of the main body wall portions of the first annular member and the second annular member at different positions in the central axis direction and around the entire circumference of the tubular main body, and the engaging grooves of the first annular member and the engaging grooves of the second annular member are arranged on the same circumference at two predetermined different intervals in the central axis direction between the first annular member and the second annular member, A cutting tape core for attachment to a wallpaper pasting machine, characterized in that it further comprises an elastic ring that fits into the engagement grooves of the first annular member and the second annular member that are aligned on the same circumference, thereby fixing the engagement state between the first annular member and the second annular member.

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