CN216636907U

CN216636907U - Adhesive split charging equipment

Info

Publication number: CN216636907U
Application number: CN202123045991.XU
Authority: CN
Inventors: 梁善良
Original assignee: Sika Jiangsu Industrial Materials Co Ltd
Current assignee: Sika Jiangsu Industrial Materials Co Ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-05-31
Anticipated expiration: 2031-12-06

Abstract

The utility model relates to an adhesive subpackage device, which is used for subpackaging fluid adhesive into packaging bags and is characterized by comprising the following components: a feed valve having an adhesive inlet through which the adhesive is fed into the interior of the feed valve and an adhesive outlet through which the adhesive is discharged from the feed valve; the metering extruder device has a hydraulic extrusion assembly with a hydraulic cylinder and a piston, and a metering actuator with an adjusting disk, which is connected to the upper end of the piston, the piston projects with its lower end into the feed valve, the adjusting disk has an adjustable top dead center position and has a bottom dead center position, the hydraulic cylinder has a projection at its upper end, the metering extruder device also has a buffer element, which is arranged between the projection and the adjusting disk, and a protective cap, which is fastened to the projection, extends upwards beyond the buffer element and laterally at least partially surrounds the buffer element. The adhesive dispensing device has the beneficial effects that fingers of an operator are prevented from being pinched when the amount of the adhesive dispensed is adjusted.

Description

Adhesive split charging equipment

Technical Field

The utility model relates to an adhesive subpackaging device which is used for subpackaging a fluid adhesive into a packaging bag.

Background

The adhesive is widely applied to the fields of building, photovoltaic, transportation, wind power and the like. The adhesive subpackaging equipment can be used for quantitatively subpackaging the fluid adhesive into the individual packaging bags. A special quantitative adjustment mechanism is required in the apparatus to adjust the amount of glue dispensed in each package.

In addition, since the operator usually needs to perform this adjustment manually during operation of the device, measures should be taken to avoid pinching of the operator's fingers.

Further, there is a need to prevent mis-adjustment of the dosing adjustment mechanism when it is inadvertently touched.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to provide an adhesive dispensing apparatus which solves at least one of the above-mentioned problems.

In order to achieve the above object, the present invention provides an adhesive dispensing apparatus for dispensing a fluid adhesive into a package bag, the adhesive dispensing apparatus comprising:

a feed valve having an adhesive inlet through which the fluid adhesive can be fed into the interior of the feed valve and an adhesive outlet through which the fluid adhesive can be discharged from the feed valve, and

a metering extruder having a hydraulic extrusion assembly with a hydraulic cylinder and a piston and a metering mechanism with a regulating disk, which is connected in the upper end of the piston, the piston protrudes with its lower end into the feed valve, the regulating disk has an adjustable upper dead point position and has a lower dead point position, the hydraulic cylinder has a projection in its upper end, wherein the metering extruder also has a buffer element and a protective cap, which is arranged between the projection and the regulating disk, which protective cap is fixed on the projection, extends upwards beyond the buffer element and laterally at least partially encloses the buffer element.

The adhesive split charging equipment has the beneficial effects that, but not limited to, the arrangement of the protective cover can effectively prevent fingers of an operator from being pinched when the amount of the split adhesive is adjusted.

Advantageously, the feed valve has an opening and closing mechanism for opening and closing the adhesive inlet and the adhesive outlet, the opening and closing mechanism being able to occupy a glue inlet position, in which the opening and closing mechanism opens the adhesive inlet and closes the adhesive outlet, or a glue outlet position, in which the opening and closing mechanism closes the adhesive inlet and opens the adhesive outlet.

Advantageously, the adhesive dispensing apparatus has a drive mechanism and a transmission mechanism connected between the drive mechanism and the opening and closing mechanism, the drive mechanism and the transmission mechanism being capable of shifting the opening and closing mechanism between a glue inlet position and a glue outlet position.

Advantageously, the drive mechanism is designed as a hydraulic drive assembly having a hydraulic cylinder and a piston which can be moved to and fro in the hydraulic cylinder.

Advantageously, the hydraulic cylinder of the hydraulic drive assembly is pivotably connected at its upper end via a joint to the gantry frame, and the piston rod of the piston of the hydraulic drive assembly is connected at its lower end via another joint to the transmission.

Advantageously, the retracted position of the piston of the hydraulic drive assembly corresponds to the glue inlet position or the glue outlet position of the opening and closing mechanism, while the extended position of the piston of the hydraulic drive assembly corresponds to the glue outlet position or the glue inlet position of the opening and closing mechanism.

Advantageously, the piston rod of the piston of the hydraulic extrusion assembly is hollow at least in its upper section and has an internal thread.

Advantageously, the metering mechanism also has a control knob and an externally threaded adjusting rod adjoining below the adjusting disk, which can be screwed with its external thread into the internally threaded upper section of the piston rod.

Advantageously, after operation of the control knob, the adjusting disk can be rotated such that the adjusting rod can be moved further into the piston or further out of the piston.

Advantageously, the metering device has an upper sensor defining the top dead centre position of the regulating disk and a lower sensor defining the bottom dead centre position of the regulating disk, which sensor is able to detect the presence of the regulating disk and to cause a change in the state of movement of the piston when the latter moves the regulating disk to the same level as one of the sensors.

Advantageously, the protective cover allows the rotation of the adjustment disc only when the adjustment disc is in the top dead centre position.

Advantageously, the protective cover has a base connected to the boss and vertically extending side walls fixed to the base.

Advantageously, the base is formed integrally from a web and has a U-shape.

Advantageously, the base has a hole for the screw to pass through, the side wall being radially inside the hole.

Advantageously, the side wall has a U-shaped cross section and extends over the entire base.

Advantageously, the side wall has at least one indentation at its upper end capable of receiving a finger.

Drawings

The utility model is explained in more detail below with reference to the drawings by means of embodiments, which are not, however, restricted to the embodiments described in the drawings and explained in detail below. The attached drawings are as follows:

FIG. 1 is a schematic front view of the adhesive metering portion of the adhesive dispensing apparatus of the present invention, with the protective cover not shown;

FIG. 2 is a schematic front view of the adhesive dispensing apparatus of FIG. 1, with a protective cover according to one embodiment visible mounted thereon;

fig. 3a is a schematic top view of the protective cover of fig. 2;

fig. 3b is a schematic side view of the protective cover of fig. 2;

FIG. 4a is a schematic top view of a protective cover according to another embodiment of the utility model; and

fig. 4b is a schematic side view of the protective cover in fig. 4 a.

Detailed Description

An illustrative embodiment of the adhesive dispensing apparatus 1 of the present invention is described below. In the description, various systems, structures and devices are schematically depicted in the drawings for purposes of explanation only and not all features of an actual system, structure or device, such as a well-known function or structure, are not described in detail to avoid obscuring the present invention in unnecessary detail. It will of course be appreciated that in the development of any such actual implementation, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which will vary from one implementation to another. Moreover, it will be appreciated that such implementation decisions, while complex and time consuming, are nevertheless routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

The terms and phrases used herein should be understood and interpreted to have a meaning consistent with the understanding of those terms and phrases by those skilled in the relevant art. No special definition of a term or phrase, i.e., a definition that is different from the ordinary and customary meaning as understood by those skilled in the art, is intended to be implied by consistent usage of the term or phrase herein. To the extent that a term or phrase is intended to have a special meaning, i.e., a meaning other than that understood by skilled artisans, such a special definition will be expressly set forth in the specification in a definitional manner that directly and unequivocally provides the special definition for the term or phrase.

Throughout the following description, unless the context requires otherwise, the words "comprise", "comprising", and variations thereof, such as "comprises", "comprising", and "having", will be interpreted in an open, inclusive sense, i.e., as "including but not limited to".

An embodiment of the adhesive dispensing apparatus 1 of the present invention is illustrated in the following with reference to figures 1 to 4 b. The adhesive dispensing apparatus 1 may be used to dispense an adhesive in a fluid state into individual packages.

Fig. 1 and 2 show a part of an adhesive dispensing apparatus 1, which is mainly used for the metered feeding of adhesive.

The adhesive dispensing apparatus 1 may have a frame 1, and the frame 1 may have four support legs 2 and a carrier table 3 fixedly supported by them.

The adhesive dispensing apparatus 1 can have two

portal frames

4, 5 adjoining one another, namely a left portal frame 4 and a right portal frame 5. The

gantry frames

4, 5 can be fixed on the frame 1.

The adhesive dispensing device 1 can have a feed valve 6, which feed valve 6 can be fastened to the support platform 3 and in the left gantry frame 4. The feed valve 6 may have an adhesive inlet 7 on its side facing the outside of the paper, via which adhesive inlet 7 fluid adhesive can be fed into the interior of the feed valve 6. The feed valve 6 can have an adhesive outlet (not shown) on its side facing the interior of the paper, via which adhesive can be metered out of the feed valve 6 and into individual packaging bags for distribution.

The feed valve 6 may have an opening and closing mechanism (not shown) for opening and closing the adhesive inlet 7 and the adhesive outlet in its interior, which may have two switching positions, i.e., a glue inlet position and a glue outlet position. In the glue-in position, the opening and closing mechanism may open the adhesive inlet 7 and simultaneously close the adhesive outlet, while in the glue-out position, the opening and closing mechanism may close the adhesive inlet 7 and simultaneously open the adhesive outlet.

The adhesive dispensing apparatus 1 may have a drive mechanism 8 and a transmission mechanism 9 connected between the drive mechanism 8 and the opening and closing mechanism, the drive mechanism 8 and the transmission mechanism 9 may switch the opening and closing mechanism between a glue inlet position and a glue outlet position. The drive mechanism 8 may be designed as a hydraulic drive assembly which may extend vertically and may have a hydraulic cylinder 33 and a piston 10 which can be moved to and fro therein. The hydraulic cylinder 33 can be connected at its upper end via a joint 11 pivotably to the top of the right gantry frame 5 and the piston 10 can be connected at its lower end via another joint 12 to the right end of the transmission 9. The gear mechanism 9 may be of rod-shaped design and may extend horizontally and thus perpendicularly to the direction of extension of the piston 10. The transmission mechanism 9 may be rotatably supported at its right end on the carrier seat 13 and connected at its left end to the opening and closing mechanism therein via the right-hand opening of the feed valve 6. The piston 10 can rotate the transmission 9 in one direction through an angle about its axis when the piston 10 moves downwards, and can return the transmission 9 in the opposite direction through the same angle when the piston 10 moves upwards. When the transmission mechanism 9 rotates, the transmission mechanism 9 drives the opening and closing mechanism to move between the glue inlet position and the glue outlet position. For example, the retracted position of the piston 10 may correspond to the glue inlet position of the opening and closing mechanism, and the extended position of the piston 10 may correspond to the glue outlet position of the opening and closing mechanism. It is of course also conceivable that the retracted position of the piston 10 may correspond to the glue dispensing position of the opening and closing mechanism, and the extended position of the piston 10 may correspond to the glue dispensing position of the opening and closing mechanism.

The adhesive dispensing apparatus 1 may have a quantitative extruding device 14 which can quantitatively extrude the adhesive in the feed valve 6 from the adhesive outlet.

The metering extrusion device 14 may have a hydraulic extrusion assembly which may have a hydraulic cylinder 15 and a piston 16 reciprocable therein (only the upper end of its piston rod is visible in the figure). The hydraulic cylinder 15 may extend vertically through the top of the left gantry frame 4. The hydraulic cylinder 15 may be fixedly connected at its lower end to the top of the feed valve 6 and communicate with the feed valve 6, and may form at its upper end a boss 17, which boss 17 may have a flat square boss surface (i.e. an upper surface). The piston 16 may extend through the entire hydraulic cylinder 15 and may protrude with its lower end into the interior of the feed valve 6. As the piston 16 moves downward, the lower end of the piston 16 may press the adhesive downward so that it is extruded from the adhesive outlet. The upper end of the piston 16 or its piston rod always projects beyond the boss surface of the boss 17. The piston 16 may be hollow at least in its upper section and may have an internal thread.

The quantitative extruding device 14 may have a quantitative adjusting mechanism by which the amount of the adhesive extruded by the piston 16 can be adjusted. The metering mechanism may have an adjustment disk 18, a control disk 20 with a control knob 19 adjacent to the upper side of the adjustment disk 18, and an externally threaded adjustment rod 21 adjacent to the lower side of the adjustment disk 18. The adjusting disk 18, the control disk 20 and the adjusting rod 21 can be formed integrally and coaxially. The adjusting rod 21 can be screwed with its outer thread into the internally threaded upper section of the piston 16. After unscrewing the control knob 19 on the control disk 20, the operator can only grasp the control disk 18 with his fingers and rotate the control disk 18 and thus the entire metering mechanism, so that the regulating rod 21 is moved further into the piston 16 or is rotated further out of the piston 16, and the regulating disk 18 is moved closer to or farther away from the piston 16. When the control knob 19 is tightened, the operator cannot rotate the dial 18, thereby preventing erroneous adjustment of the dial 18. The dose setting mechanism may be moved up and down together by the piston 16.

The metering extruder 14 can have a rod 22 which is fastened vertically on the cam 17 and on which two

sensors

23, 24 are arranged one after the other, namely an upper sensor 23 on the upper side and a lower sensor 24 on the lower side. At least the upper sensor 23 is height adjustable up and down on the rod 22. The

sensors

23, 24 may be

contactless sensors

23, 24, for example infrared sensors, which may emit infrared rays in a horizontal direction toward the dial 18, and receive infrared rays reflected by the dial 18 and convert into electrical signals.

When the adjustment dial 18 is moved to the same level as one of the

sensors

23, 24, the

sensor

23, 24 may detect the presence of the adjustment dial 18 and send a signal to a control device (not shown). In particular, when the piston 16 moves the adjustment disc 18 upwards to the same level as the upper sensor 23, the upper sensor 23 can detect the adjustment disc 18 and at the same time send a signal to the control device, which can stop the movement of the piston 16 for a fixed time interval, for example 2-6 seconds, for example 4 seconds, according to the signal, and then the control device can control the piston 16 to continue the reverse downward movement. When the piston 16 moves the adjustment disc 18 downwards to the same level as the lower sensor 24, the lower sensor 24 can detect the adjustment disc 18 and at the same time send a signal to the control device, which can stop the movement of the piston 16 for a fixed time interval, for example 1-3 seconds, for example 2 seconds, according to the signal, and then the control device can control the piston 16 to continue to move upwards in the opposite direction until the movement is stopped by the detection of the upper sensor 23. Thereby effecting one stroke of the piston 16.

The adjusting disk 18 can thus have a top dead center position at the level of the upper sensor 23 and a bottom dead center position at the level of the lower sensor 24. The amount of glue that can be pressed out by piston 16 during each stroke may depend on the distance between the top dead center position and the bottom dead center position. The quantity of glue that can be pressed out per stroke can be dispensed downstream into a package. When it is desired to increase the quantity of glue per bag, the operator rotates the adjustment disc 18 upwards with respect to the piston 16 and moves the upper sensor 23 correspondingly upwards, and when it is desired to decrease the quantity of glue per bag, the operator rotates the adjustment disc 18 downwards with respect to the piston 16 and moves the upper sensor 23 correspondingly downwards.

The metering extruder 14 may have a buffer 25 made of an elastic material supported on the boss surface of the boss 17 and penetrated by the piston 16. The buffer 25 can be made of rubber in this embodiment, for example. The buffer 25 may have a hollow cylindrical shape, and the inner diameter thereof may be slightly larger than the diameter of the piston 16 (or piston rod), so that the piston 16 does not carry the buffer 25 when moving up and down. The outer diameter of the damper 25 may be smaller than the diameter of the adjustment disc 18. The height of the buffer 25 may be less than or equal to the height of the lower sensor 24. The damper 25 has the effect that, for example, in the event of a failure of the lower sensor 24, the piston 16 with the actuating disk 18 moves downward beyond the bottom dead center position until the actuating disk 18 strikes against the damper 25 and is stopped by damping (spring impact). However, without the damping element 25, the control disk 18 would be slammed against the boss surface of the boss 17 (metal-to-metal impact), which would lead to damage to the control disk 18.

However, the provision of the buffer member 25 may instead cause the following problems: since the operator typically rotates the dial 18 to adjust the amount of glue during operation of the device, which can take several seconds, the operator's fingers may move downward a significant distance as the dial 18 moves downward, causing the operator's fingers to be inadvertently pinched between the dial 18 and the bumper 25, causing finger injury.

In order to avoid pinching of the fingers by the operator when operating the setting disk 18, the metering device 14 may also have a protective cap 26. Referring to fig. 2, boot 26 may be mounted on the boss face of boss 17. Boot 26 may be made of metal, such as iron. Fig. 3a and 3b show an isolated view of protective cap 26 in fig. 2.

Boot 26 may have a base 27 for connection with the boss face of boss 17. The base 27 may be formed in the shape of a U from 3 tabs, i.e. with two parallel tabs and a third tab which will be perpendicular to and connect the two. The webs can be formed in one piece. Each tab may have a horizontal width, with an inner edge 28 of the tab enclosing a void of greater dimension than the outer diameter of the bumper 25 to accommodate it, and an outer edge 29 of the tab may be flush with the outer edge of the boss face of the boss 17. In order to fix the base 27 on the boss surface of the boss 17, holes 30 may be provided in the base 27 at the junctions between the tabs and corresponding threaded holes may be provided in the boss surface to fix the base 27 to the boss surface with screws. Other fastening means are of course also conceivable, such as adhesive bonding, welding, etc.

Boot 26 may have a side wall 31, which side wall 31 may be fixed, e.g. welded, to base 27 and may have a U-shaped cross-sectional shape. Referring to fig. 3a, in a top view thereof, the U-shaped side wall 31 may be located inside the hole 30 and the free end of the U-shaped side wall 31 may be flush with the free end of the U-shaped base 27. The height of the side walls 31 may be arranged such that the upper edges of the side walls 31 are higher than the upper edge of the bumper 25, e.g. by a distance which is larger than the width of the finger. Referring to fig. 2, the height of the side walls 31 may be set such that the upper edges of the side walls 31 are slightly below or at the same level as the lower disc surface of the adjustment disc 18 in its top dead center position. The protective cap 26 therefore essentially only allows the operator to adjust the adjustment disc 18 during its dwell in the top dead centre position, but can no longer follow the adjustment disc 18 down, thus avoiding fingers being pinched between the adjustment disc 18 and the damping element 25.

The U-shaped protective cover 26 is closed on three sides only, and is open on one side, the open side facing the bar 22 and the

sensors

23, 24 thereon, to prevent the side walls 31 of the protective cover 26 from obstructing the detection of the dial 18 by the

sensors

23, 24.

In the embodiment of the protective shield 26 shown in fig. 3a and 3b, the operator can screw the adjustment disk 18 over the protective shield 26.

Fig. 4a and 4b show a further embodiment of protective cap 26. Only the features of this embodiment that differ from the embodiment shown in fig. 3a and 3b will be described below, and the description of the same or similar features will be omitted here.

In contrast to the embodiment shown in fig. 3a and 3b, the side wall 31 of the protective cap 26 shown in fig. 4a and 4b can have a greater height and a square indentation 32 at its upper end. In the mounted state, the upper edge of the protective hood 26, excluding the cutout 32, can be situated approximately at the same level as the upper disc surface of the adjusting disc 18 in the top dead center position. While the upper edge of the cutout 32 of the protective cap 26 can be situated approximately at the same level as the lower disc surface of the adjusting disc 18 in the top dead center position. The height of the recess 32 is therefore approximately equal to the thickness of the adjusting disk 18. Thus, the operator can only rotate the adjustment disk 18 with fewer fingers, for example, a thumb, at the notch 32 when the adjustment disk 18 is in its top dead center position, but this is sufficient to rotate the adjustment disk 18. This can thereby further avoid the risk of finger pinching.

Only one notch 32 is shown in this embodiment. It is also contemplated that two or more notches 32 arranged in succession may be circumferentially disposed at the upper end of the shield 26 for accommodating more fingers.

In the embodiment of the protective cap 26 shown in fig. 4a and 4b, the operator can only screw the adjusting disk 18 at the notch 32 of the protective cap 26.

The adhesive dispensing apparatus 1 of the present invention achieves a major technical effect, for example, in that the arrangement of the protective cover 26 can effectively prevent fingers from being pinched by an operator when adjusting the amount of adhesive dispensed. Boot 26 is simple in construction and easy to manufacture and install. The amount of adhesive that is squeezed out by the piston 16 per stroke can be easily adjusted by the quantitative adjustment mechanism. The control knob 19 is effective to prevent mis-adjustment. The hydraulic drive mechanism 8, in combination with its transmission 9, can easily control the switching mechanism to switch between the glue inlet position and the glue outlet position.

Finally, it is noted that the above-mentioned embodiments are only for understanding and explaining the present invention, and do not limit the scope of the present invention. It will be apparent to those skilled in the art that modifications may be made in the foregoing embodiments, all without departing from the scope of the utility model.

Claims

1. The utility model provides an adhesive partial shipment equipment, adhesive partial shipment equipment is used for with the adhesive partial shipment of fluid state to the wrapping bag in, its characterized in that, adhesive partial shipment equipment includes:

quantitative extrusion device, quantitative extrusion device has the hydraulic pressure extrusion assembly who has pneumatic cylinder and piston and has the ration adjustment mechanism of adjustment disk, the ration adjustment mechanism is connected the upper end of piston, the piston stretches into the feed valve with its lower extreme in, the adjustment disk has adjustable top dead center position and has bottom dead center position, the pneumatic cylinder has the boss at its upper end, wherein, quantitative extrusion device still has bolster and safety cover, the bolster sets up between boss and adjustment disk, the safety cover is fixed on the boss, upwards extends beyond the bolster and at least partially surrounds the bolster in the side direction.

2. An adhesive dispensing apparatus according to claim 1, wherein the feed valve has an opening and closing mechanism for opening and closing the adhesive inlet port and the adhesive outlet port, the opening and closing mechanism being capable of assuming either a glue inlet position in which the opening and closing mechanism opens the adhesive inlet port and closes the adhesive outlet port, or a glue outlet position in which the opening and closing mechanism closes the adhesive inlet port and opens the adhesive outlet port.

3. An adhesive dispensing apparatus as defined in claim 2 having a drive mechanism and a drive mechanism connected between the drive mechanism and the shutter mechanism, the drive mechanism and drive mechanism being capable of shifting the shutter mechanism between the glue inlet position and the glue outlet position.

4. An adhesive dispensing apparatus as recited in claim 3 wherein said drive mechanism is configured as a hydraulic drive assembly having a hydraulic cylinder and a piston reciprocable therein.

5. Adhesive dispensing apparatus according to claim 4, wherein the hydraulic cylinder of the hydraulic drive assembly is pivotably connected at its upper end via a joint to the gantry frame and the piston rod of the piston of the hydraulic drive assembly is connected at its lower end via another joint to the transmission mechanism.

6. An adhesive dispensing apparatus according to claim 4 wherein the retracted position of the piston of the hydraulic drive assembly corresponds to the glue inlet or outlet position of the opening and closing mechanism and the extended position of the piston of the hydraulic drive assembly corresponds to the glue outlet or inlet position of the opening and closing mechanism.

7. Adhesive dispensing apparatus according to claim 1, wherein the piston rod of the piston of the hydraulic dispensing assembly is hollow at least in its upper section and has an internal thread.

8. An adhesive dispensing apparatus as defined in claim 7 wherein the metering adjustment mechanism further has a control knob and an externally threaded adjustment lever adjacent below the adjustment disk, the adjustment lever being threadably received with its external thread in the internally threaded upper section of the piston rod.

9. Adhesive dispensing apparatus according to claim 8 wherein the adjustment dial can be rotated only after operation of the control knob so that the adjustment lever can be moved further into or further out of the piston.

10. An adhesive dispensing apparatus as claimed in claim 1 wherein the metering device has a sensor defining an upper portion of the adjustment dial at a top dead centre position and a sensor defining a lower portion of the adjustment dial at a bottom dead centre position, the sensor being capable of detecting the presence of the adjustment dial and causing the state of movement of the piston to change when the piston moves the adjustment dial to the same level as one of the sensors.

11. The adhesive dispensing apparatus of claim 1 wherein said shroud only allows rotation of the adjustment dial when the adjustment dial is in the top dead center position.

12. The adhesive dispensing apparatus of claim 1 wherein said shroud has a base connected to said boss and vertically extending side walls secured to said base.

13. The adhesive dispensing apparatus of claim 12 wherein said base is integrally formed from a tab and has a U-shape.

14. The adhesive dispensing apparatus of claim 12 wherein the base has a hole through which the screw passes and the sidewall is radially inward of the hole.

15. The adhesive dispensing apparatus of claim 13 wherein said side wall has a U-shaped cross section and extends across the entire base.

16. The adhesive dispensing apparatus of claim 12 wherein said side wall has at least one finger-receiving indentation in an upper end thereof.