JP2002540042A - Adhesive tape strip distributor - Google Patents

Abstract

The invention relates to a novel device (1) for dispensing adhesive tape or similar in strips. The device is provided with a receptacle for a roll of adhesive tape (30), at least one feed roller (22; 23) which has a ring groove (48; 51) and a bending roller (47) which works together with the feed roller and has a ring protrusion (52). A first toothed bar (14) which is connected to a lever (8) and which drives the feed roller (22; 23) is also provided, together with a cutting element (33). Said cutting element can be triggered by a second toothed bar (14') which is connected to the lever (8), using a first gear wheel (38). The two toothed bars (14, 14') are provided on both sides of the lever (8). At least one of the toothed bars (14, 14') is also guided in a lower connecting link (20) which is situated in the lower area of the housing (2) and in an upper connecting link (13) which is located on the lever (8), in such a way that the toothed bar (14, 14') indirectly engages with the feed roller (22; 23) and the first gear wheel (38) during the downward movement of the lever (8) and disengages during the upward movement thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001] The present invention relates to a device for dispensing an adhesive tape strip according to claim 1.

BACKGROUND OF THE INVENTION An instrument of this type is known, for example, from US Pat. No. 5,207,860.
The device has a lever with at least two arcuate toothed racks that mesh with various gears. This device contains a large number of individual parts. The lever is rotatably supported on a shaft and is connected to the rack via a pin.
The cutting tool is actuated by a relatively complex gear configuration, various tension and flat springs. A slight momentum is generated by the one-sided support structure of the rack on the side of the lever, which acts on the lever shaft in such a manner that the rack cannot be twisted when the lever is moved downward. Also, the actual operation is awkward because the device is quite bulky.

DISCLOSURE OF THE INVENTION It is an object of the present invention to create an adhesive tape dispenser which consists of a substantially small number of parts and is easy to handle.

[0004] The above object is achieved by a device having the features of claim 1.

The device according to the invention has the great advantage that it is very compact and particularly easy to operate. Also, since the support for the adhesive tape roll is designed as an insert member, many components of the adhesive tape distributor are reusable.

(Best Mode for Carrying Out the Invention) Other advantages of the present invention are described in the description of the embodiments in the claims and in the following description. The present invention will be described in more detail with reference to FIG.

[0007] The same reference numbers are used for identical elements in the drawings, and the first description refers to all figures unless otherwise specified.

As shown in FIGS. 1 and 2, the adhesive tape distributor 1 has two housing walls 3.
3 ', the two housing walls 3, 3' being arranged essentially parallel to one another, but only the contour 4 of the front housing wall 3 is shown in the drawing. A connecting member 5 extending in the circumferential direction is provided between the two housing walls 3, 3 '. In both housing walls 3, 3 ', a lever 8 is supported on both sides by a rotating shaft 7. The lever 8 has two L-shaped parts 9, 9 ′ (only the front part 9 is shown) and an upper connecting member 10. On the surface of the lever 8 facing the housing 2, a cam 11 having a function of transporting a strip of adhesive tape
Is provided. The two L-shaped parts are provided with respective pins 12 which engage with short sliding guide plates 13 of a triangular rack 14 with toothed circular sector parts. At the lower corner 16 of the rack 14 is mounted a pin 18 which engages a long sliding guide plate 20 of the housing wall 3. Another toothed rack 14 'of the same type (not shown) is provided on the opposite housing wall 3'. The lever 8 is held at the start position shown in FIG. 1 by a U-shaped tension spring (not shown in detail). This tension spring has one leg pressed against the lower surface of the L-shaped part 9 and the other leg rests on the projection of the housing wall 3. Of course, other types of compression springs can be used for this purpose, such as a flat spring, a helical spring or a similarly designed spring.

Also, the two side portions 26, 26 ′ held together by the spacer element 25
The support member 24 is provided with two transport rolls 22 and 23. Gears 27 and 28 that can mesh with the toothed rack 14 are provided on the side surfaces of the two transport rolls 22 and 23 each having the knurls formed in the axial direction.
Further, a plurality of pins 29 functioning as shafts are arranged between the two side portions 26 and 26 ′, and the adhesive tape roll 30 is rotatably supported on the pins 29. The pin 29 also functions as a spacer component and a connecting member between the side portions 26, 26 '. The support member 24 is arranged as an insert so that when the roll 30 of adhesive tape is used up, it can be replaced. On the shaft 34 of the opposite housing wall 3 ', a slightly curved lever arm 32 with a triangular knife 33 provided as cutting means is supported. The lever arm 32 with the lower edge 36 formed as a control edge is connected to a shaft 39 provided on the housing wall 3 '.
It is in contact with the cam 37 of the gear 38 supported above. A pin 4 is provided on the inner surface of the gear 38.
1 and the pin 41 is connected to the housing wall 3 via a tension spring 42.
′ Is pre-tensioned. When the gear 38 is disengaged, i.e., no longer engages the rack 14 '(FIG. 1), the tension spring 42 contracts. When the gear 38 engaging the rack 14 'is rotated by about 180 ° by the rack 14' (FIG. 2), the tension spring assumes its most tensioned position. That is, when the gear 38 is no longer engaged with the toothed rack 14 ', it returns to its start position (FIG. 1).

FIG. 3 shows a path (broken line) of the adhesive tape 45. In this state, the two transport rolls 22 and 23 are rotated clockwise by the toothed rack 14 via the gears 27 and 28, so that the adhesive tape 45 is attached to the two transport rolls 22 and 23.
It is folded in the longitudinal direction by a folding roll 47 arranged between the members 23. In this configuration, two circumferential grooves 48 (FIG. 4) are provided on the second transport roll 23, and a circular disk 49 is formed at the center of these grooves. The first transport roll 22 is provided with only one circumferential groove 51 corresponding to the circular disk 49, and the circular disk 49 closes the circumferential groove 51 in a slightly overlapping manner. A ring-shaped protrusion 52 is provided in a central zone of the folding roll 47, whereby the adhesive tape 20 is bent in a V shape along the longitudinal direction. FIG. 3 shows the support member 2
It will be appreciated that the insert 4 is located in the housing 2 as an insert.

FIG. 5 shows a transport process using two transport rolls 22 and 23.
In FIG. 5a, the lever 8 is in its starting position, ie, the position in which the lever 8 has been pushed upward (arrow A) by a tension spring. In this state, the toothed rack 14
The gears 27 and 28 of the two transport rolls 22 and 23 are not engaged. here,
Since the L-shaped transverse part 9 of the lever 8 is located closer to the housing wall 3 (not shown in this figure), a part of the toothed rack 14 is shown in broken lines. Next, when the lever 8 is pushed down (FIG. 5b), the toothed rack 14 is engaged with the two gears 27, 28 with the aid of the sliding guide plates 13, 20, whereby the transport rolls 22, 23 are rotated clockwise. And the adhesive tape 45 is transported. When the lever 8 is fully depressed, the toothed rack 14 is still in engagement with the gears 27,28. Only when the lever 8 is released and moves upward by the action of the tension spring does the rack 14 disengage from the gears 27,28. That is, the gears 27 and 28 stop, and the adhesive tape is no longer conveyed. While the lever 8 descends from its uppermost position (FIG. 5a) to its lowermost position (FIG. 5c),
An adhesive tape strip of precisely defined length is transported by transport rolls 22,23. The lever 8 can also be released in its intermediate position (FIG. 5b), whereby the toothed rack 14 disengages from the gears 27,28. If the lever 8 is depressed again, a strip of adhesive tape of a corresponding length is transported. Thus, by repeatedly operating the lever 8, a strip of any desired length is obtained.

FIG. 6 shows the cutting operation in more detail. The toothed rack 14 ′ is moved downward by the lever 8 in the same manner as the rack 14. As shown in FIG. 6, the rack 14 ′ is provided with teeth only in its lower zone, which teeth can engage with the gear 38. In the lowermost position of the rack 14 '(FIG. 6c), the teeth of the rack are still engaged with the gear 38, whereby the tension spring 42 is fully pulled. When the lever 8 is now released, the gear 38 with the cam 37 continues to rotate clockwise and the lever arm 32 with the triangular knife 33 jumps upward, thereby cutting the strip of adhesive tape 45. (FIG. 6d). Since the adhesive tape is previously bent into a V shape, the cut strip has a straight cut. When the lever 8 is released in the intermediate position (FIG. 6b), the lever arm 2 does not jump because the gear 38 and therefore the cam 37 do not reverse, so that no strip is cut. By the cooperation of the conveying rolls 22, 23 and the non-biased knife 33, it is possible to arbitrarily determine the length of the strip that exceeds the minimum length (the length of the tape delivered at the time of a single depression). As described above with reference to FIG. 5, the toothed rack 14 'may be provided with teeth throughout its length. Further, the racks 14, 14 'can be formed as an integral member with the L-shaped portions 9, 9', in which case the pins 12 and the shift guide plate 13 can be omitted.

As will be appreciated by those skilled in the art, the mechanism of the adhesive tape dispenser 1 is made up of a very small number of individual parts, and therefore can save considerable material and cost. Another advantage of the adhesive tape distributor 1 of the present invention is that the important elements with the lever 8 and the cutting means 33 can be reused and that only the insert with the adhesive tape roll 30 or the support member 24 has to be exchanged. It is. This further reduces environmental pollution and the insert or support member 24 is recyclable.

[Brief description of the drawings]

FIG. 1 is a schematic view showing the principle of the adhesive tape distributor of the present invention, showing a lever at a start position thereof.

FIG. 2 shows the same adhesive tape dispenser lever as in FIG. 1 in its depressed state.

FIG. 3 is a view showing a transport mechanism of the same adhesive tape distributor as in FIG. 1;

FIG. 4 is a plan view and a sectional view showing a transport roll and a bending roll.

FIG. 5A is a drawing for explaining a drive structure of a transport roll, and shows a lever in one of various positions.

FIG. 5B is a view for explaining a drive structure of the transport roll, and shows a state where the lever is at one of various positions.

FIG. 5c is a drawing for explaining the drive structure of the transport roll, showing the lever being at one of various positions.

FIG. 5D is a view for explaining a drive structure of the transport roll, and shows a state where the lever is at one of various positions.

FIG. 6a illustrates the cutting process and shows the lever in one of various positions.

FIG. 6b illustrates the cutting process and shows the lever in one of various positions.

FIG. 6c illustrates the cutting process and shows the lever in one of various positions.

FIG. 6d illustrates the cutting process, showing the lever in one of various positions.

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Claims (11)

[Claims] 1. A holder (29) for holding an adhesive tape roll (30) and at least one transport roll (22; 23) provided with a circumferential groove (48; 51).
A folding roll (47) provided with a circumferential projection (52); and a lever (8).
And driving at least one of the transport rolls (22; 23),
First gear (38) by toothed rack (14) and second toothed rack (14 ')
In a device (1) for dispensing strips, such as adhesive tape (45), having cutting means (33) driven by means of a double toothed rack (14, 14 ') on either side of a lever (8). The toothed rack (14, 14 ') is provided during the downward movement of the lever (8).
2; 23) and at least one toothed rack (14) so as to indirectly engage with the first gear (38) and disengage from said rack (14, 14 ') for ascending movement. , 14 ') are provided in a lower slide guide plate (20) provided in the lower part of the housing (2) and an upper slide guide plate (13) provided in the lever (8).
A device characterized by being guided within. 2. The conveying rolls (22, 23) are coaxial with gears (27; 28).
), Wherein said gear (27; 28) is engagable with a toothed rack (14). 3. The device according to claim 1, wherein the first gear (38) is rotatably supported against a tension spring (42). 4. The method according to claim 1, wherein a second transport roll is provided, the second transport roll being driven by a first toothed rack. An instrument according to any one of the preceding claims. 5. The apparatus according to claim 4, wherein the second transport roll (22) is provided with a circumferential groove (51), and the two transport rolls mesh together in a slightly overlapping manner. . 6. The device according to claim 5, wherein the transport rolls (22; 23) are formed with knurls in the axial direction. 7. The cutting means comprises a lever arm (32) controlled by a first gear (38) and a knife (33) arranged on the lever arm (32). The device according to any one of claims 1 to 5, wherein the device is characterized in that: 8. The lever arm (32) has an end opposite to the knife (33) rotatably supported in a housing, and the lever arm (32) has a first gear (38). 8. A device according to claim 7, wherein a slide guide plate (36) is provided which is moved towards the transport roll (22; 23) by said cam (37). 9. The device according to claim 7, wherein the knife is triangular. 10. The device according to claim 1, wherein the lever (8) is provided with a transport (11) for transporting a cut strip of adhesive tape. 11. An adhesive tape roll (30) provided with a holder (29) for an adhesive tape roll (30), a transport roll (22; 23), and a folding roll (47).
) Have a common support member or insert (2) that can be inserted into the housing (2).
4) The device according to any one of claims 1 to 10, wherein the device is mounted thereon.