CN116674860A

CN116674860A - Disposable exclusive snack box

Info

Publication number: CN116674860A
Application number: CN202310729620.8A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-06-16
Filing date: 2023-06-16
Publication date: 2023-09-01

Abstract

The invention discloses a disposable exclusive snack box, which comprises a box body and a box cover; the opening edge of the box body opening is provided with a surrounding reinforcing ring, and the outer curved surface of the reinforcing ring and the bottom eave meet to form a first-stage inverted step; the periphery of the box cover is provided with a surrounding wall formed by connecting breaking-off splints with lower buckling edges and arranging the lower buckling edges at intervals, the inner side of the breaking-off splints is provided with saw teeth, and the inner side of the box cover is embedded with a soft base plate; when in packaging, the box body is buckled by the box cover, the box cover is pressed down to the cushion plate to release elastic deformation, the saw tooth tips at the inner side of the breaking piece slide over the outer curved surface of the reinforcing ring, the saw tooth tips are buckled into and engaged with the inverted step under the action of elasticity, the upper cover and the packaging of the box contents are completed, and the cover is opened only by pulling the breaking piece by one hand to enable the saw tooth to be tripped with the bottom eave of the reinforcing ring and removing the box cover; the split piece cannot be restored after splitting, so that a bystander is prevented from privately opening the snack box, and the monopolization of the owner of the snack box is ensured; besides the quick locking and sealing of the upper cover, the box has the functions of box taking by one hand, scalding prevention and heat insulation.

Description

Disposable exclusive snack box

Technical Field

The invention relates to a technical scheme in the field of food packaging, in particular to a disposable exclusive snack box.

Background

At present, most takeaway cutlery boxes can be opened and closed at will, and a middle circulation link is arranged between a seller and a buyer in general snack, and the link cannot be controlled by the two parties, so that convenience is provided for unclean behaviors, for example, a person who sends the snack is hard to endure hunger and thirst after running under the strict rules of industry, takes out one takeaway cover in a container on site to take one mouth, then closes the cover for restoration, and the person easily has no awareness of customers; this is a matter of deliberate fear for the user. Recently, there are solutions: the metal cover of the pop-top can is used for making a fast food box cover, so that the cover is not difficult to cover; however, the snack box is required to be sent to an operating platform of a matched machine for clamping and rotary spinning to cover and pack, the snack box is slow and complex, and the kitchen is further provided with: vacating the ground discharge machine; also, a person drinking soup is likely to be frightened, not dared to drink by sticking his mouth, and not cut his mouth by the sharp cover stub left on the mouth of the cutlery box. Other pain points of the snack box which are damaged when the cover is opened are as follows: the cover opening is time-consuming and labor-consuming, the chopsticks are full of greasy hands, two hands are needed, and the chopsticks can be completed by the operator; in addition, the disassembling and wasting mechanism on the snack box affects the sealing effect too much, or the toothpick can be used for opening the box cover from the opposite side of the disassembling and wasting mechanism without damage.

Disclosure of Invention

The invention provides a disposable exclusive snack box, which solves the problems of safety, sanitation and inefficiency existing in the prior art; the disposable exclusive snack box has the functions of one-hand capping and uncapping and taking.

In order to solve the technical problems, the invention provides a disposable exclusive snack box, which comprises,

the box body is provided with a surrounding reinforcing ring at the opening edge of the opening of the box body;

the box cover is provided with a surrounding wall formed by connecting a plurality of lower buckling edges with a plurality of breaking pieces and alternately arranging the lower buckling edges and the breaking pieces, and a concave dish is arranged on the top of the box cover.

Wherein, the intersection of the outer curved surface of the reinforcing ring and the bottom eave forms a first-stage inverted step.

The reinforcing ring is provided with an annular groove for wrapping the opening edge of the box body, and the inner wrapping surface of the annular groove is an inverted conical surface.

Wherein, the inner wrapping veneer and the outer wrapping veneer of the annular groove are provided with corrugated grooves.

The lower buckling edge is connected with the breaking piece through the pre-pressing mark to achieve connection and folding to form the enclosing upper.

The trend of the pre-pressing mark is oblique to the whole plane of the box cover in a wavy line, and horn mouths are arranged at two ends of the pre-pressing mark.

Wherein, the inner side of the breaking piece is provided with saw teeth.

Wherein a circle of arch-shaped groove is arranged between the surrounding upper and the concave dish, and a water wave sealing line is arranged in the arch-shaped groove.

Wherein, the inner face of the box cover is provided with a soft cushion plate, and the plate body at the edge of the cushion plate is provided with an annular peak valley body.

The soft pad and the corresponding contact part of the box body and the contact part of the soft pad and the reinforcing ring can move and seal.

The box cover is provided with a soft cushion plate, the box cover can carry the soft cushion plate to the corresponding ring opening of the reinforcing ring on the box body, the ring opening is oppositely extruded into the annular peak-valley groove body and the arched groove behind the annular peak-valley groove body, the saw teeth on the inner side of the breaking piece are driven to slide through the outer curved surface of the reinforcing ring by utilizing the inclined planes of the tooth backs, and the tooth tips are buckled into and engaged with the inverted step under the action of elasticity, so that the box cover and the box body are in close fit.

The outer wall of the box body is provided with a hand notch at the lower section of the bottom plate, and the edge of the hand notch is provided with a hand protection wrapping edge.

The beneficial effects of the invention are as follows:

the packaging and packaging can be realized by pressing the box cover on the cutlery box with ordinary hand force without using equipment such as a cutlery box sealing machine, so that the cutlery can be prepared at any time and any place; the breaking sheet of the unpacked cutlery box can not be restored, if someone opens the cover of the cutlery box during the delivery and storage period, the pre-indentation is broken to leave a definite evidence, and bad motivation is effectively frightened; the arched groove with the water wave sealing line is combined with the soft pad close to the inner surface of the box cover, so that the heat insulation is further improved, and the heat insulation and leakage prevention grade of the cutlery box is obviously improved; the reinforcement ring is high in rigidity, and combines with the sawteeth which are formed by multi-tooth columns in the breaking-off piece, under the mutual promotion that the lower buckling force is acting force and the rigidity of the reinforcement ring is reacting force, the sawteeth which are in sliding contact with the inclined surface and the acute-angle-shaped inverted steps are easy to mutually buckle and lock up, when the cover is closed, the situation can be judged which level of sawteeth is pressed down to hook the box body properly, the same cutlery box can be wrapped in different tightness levels and can be sealed, a small amount of elastic space is also obtained in the cutlery box, and progressive and compliant operation experience is also obtained; more importantly, the advantage of closing one cover is used for saving one second for each packing, and the packing machine is particularly expensive in the occasion of dining which is necessary in the minute and the second. The bottom section of the lunch box is provided with the hand notch which is convenient for the fingers to extend in, and the notch is covered with edges, and the box cover which can dye the fingers is good in heat insulation, so that the box body which can be scalded can be prevented from being contacted when the box is taken. The steps are inverted, the split pieces and the hand notch are arranged, so that a series of actions of sealing, taking a box and removing the cover can be operated by one hand in the whole process; in addition, the reinforcing ring can change the image of soft click of the paper cutlery box, thereby improving the strength, skin sensitivity and comfort of use of the cutlery box.

Drawings

In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a cutlery box provided by the present invention;

FIG. 2 is a schematic view of a disassembled structure of the cutlery box provided by the invention;

FIG. 3 is a cross-sectional view of a cutlery box provided by a first embodiment of the present invention;

FIG. 4 is a detailed cross-sectional view of FIG. 3 provided by the present invention;

FIG. 5 is a cross-sectional view of the schedule detail of FIG. 4 provided by the present invention;

FIG. 6 is a schematic view, partially in section, of a cutlery box component provided by the first embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a cutlery box body provided by a second embodiment of the present invention;

FIG. 8 is a schematic view showing a cutlery box body according to a third embodiment of the present invention;

FIG. 9 is a schematic view of the use state of the cutlery box provided by the invention;

reference numerals are as follows

1. A box body; 11. a reinforcing ring; 111. a bottom eave; 112. inverting the step; 113. an annular groove; 1131. an inner wrapping veneer; 11300. a corrugated flute; 1132. an outer wrapping veneer; 114. an inner ring wall; 115. an assembly seam; 116 an outer collar wall; 12. a hand notch; 121. protecting hands and wrapping edges;

2. a box cover; 21. a surrounding wall; 210. pre-indentation; 2101. a horn mouth; 211. lower button edge covering; 212. breaking apart the pieces; 2121. saw teeth; 22. a concave dish; 23. an arch-shaped groove; 231. a water wave sealing line; 24. a soft backing plate; 241. annular peak valley furrows; 2410, peak groove body; 2411. a funnel-shaped curved surface; 2412, valley bodies;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention by taking the upright state of the disposable dedicated snack box as an azimuth reference.

As can be seen from fig. 1 to 6, a disposable dedicated snack box according to one embodiment of the present invention comprises:

as shown in fig. 2, 3, 4 and 5, the opening edge of the opening of the box body 1 is provided with a surrounding reinforcing ring 11, the outer curved surface of the reinforcing ring 11 intersects with a bottom eave 111 to form a first-stage inverted step 112, the included angle between the two surfaces of the inverted step 112 is an acute angle, the bottom eave 111 thus realizes functionalization, plays the role of a panel of the inverted step 112 to exert the function of anchoring stress, and the outer curved surface of the reinforcing ring 11 forms an acute angle with the included angle of the bottom eave 111 to incline outwards to generate taper.

An important application of the invention is shown in fig. 2, which is to be applied to a paper cutlery box, according to which, as a medium for the paper box body 1 to be snapped onto the cover, the reinforcing ring 11 is a thermoplastic material product which can be mass produced, and becomes a part of the paper box body 1 after being embedded; referring to fig. 4, in order to realize the application, the bottom of the reinforcing ring 11 is provided with an annular groove 113 for accommodating and wrapping the opening edge of the paper box body 1, and the annular groove 113 has three surfaces of an inner wall, an outer wall and a top surface; an inner wall: namely, an inner wrapping surface 1131, which is tightly attached to the opening edge of the box body 1 along the inner side, of the annular groove 113, wherein the inner wrapping surface 1131 is formed into an inverted conical surface in the figure, the inner wrapping surface 1131 is formed into a conical opening for tightly matching with the paper cutlery box body 1, and the opening of the paper cutlery box body 1, namely the whole body, is formed into a conical shape, so that the nesting and stacking of finished products are facilitated; the conical structure is characterized in that the opening edge of the box body 1 is large and small, and is easy to sleeve and convenient and rapid to assemble, and the tightness is achieved after the opening edge is elastic.

Further, see fig. 6, the inner and outer walls of annular groove 113: namely, the inner wrapping surface 1131 and the outer wrapping surface 1132 are provided with corrugated grooves 11300, when the paper cutlery box body 1 and the reinforcing ring 11 are assembled, the annular grooves 113 and the opening edges of the box body 1 generate contact surfaces, if the adhesive is used for bonding, the contact area of the adhesive and the base material can be increased and the bonding is consolidated by the corrugated grooves 11300, in addition, partial materials can be extruded into the corrugated grooves 11300 when the opening edges of the paper are pressed, so that the structural cross entanglement is caused, and the assembly firmness is increased.

The hand notch 12 is shown in fig. 1, the hand notch 12 is provided with two outer walls symmetrically arranged at the lower section of the bottom plate of the cutlery box, and the edge of the mouth of the hand notch 12 is provided with a hand protection edge 121; the hand notch 12 is provided to facilitate single hand operation, while the guard edge 121 is designed with a double-pieced arc conforming to the finger profile.

The box cover 2 is shown in fig. 2, wherein the box cover 2 mainly comprises a surrounding wall 21 and a concave dish 22, and the surrounding wall 21 mainly comprises a lower buckle edge 211 and breaking-off pieces 212; in the figure, the breaking blades 212 are disposed on the surrounding wall 21 in a ring-shaped array, and two sides of the breaking blades are adjacent to the lower fastening edge 211; the joint between the lower buckle edge 211 and the breaking piece 212 is provided with a pre-indentation 210, wherein the pre-indentation 210 is the weakest link of the whole surrounding wall 21 and is a concave line body specially arranged on the inner surface and the outer surface of the joint between the lower buckle edge 211 and the breaking piece 212, so that the structure of the joint is thinned, the structural strength of the joint is much weaker than that of the surrounding part, and the joint is easy to break under the action of external force; the trend of the pre-indentation 210 is set to be wavy and oblique, which is equivalent to that the tearing track of the pre-indentation 210 is a curve, and the total trend of the curve is tangential and oblique to the whole plane of the box cover 2, so the setting reason is that: the initial force direction of the breaking-off piece 212 is on the radial plane of the lid 2, and the arrangement of the pre-pressing mark 210 can increase the included angle between the pre-pressing mark 210 and the radial plane, so that the force of the breaking-off piece 212 to the pre-pressing mark 210 generates an ideal shearing angle, which is beneficial to tearing.

As shown in fig. 2, two ends of the pre-pressing mark 210 are provided with a bell mouth 2101, and the purpose of the pre-pressing mark is: the pre-indentation 210 is helped to be torn by leading in hand force, and the finger tip side edge is also convenient to be inserted into the back of the corner end of the breaking piece 212 through the horn mouth 2101 for opening the cover to take care of the person with long nails; on the other hand, the flare 2101 at the end of tearing can be regarded as a cliff, that is, the pre-indentation 210 is broken to be crisp, so that the operation feeling of the breaking piece 212 is stronger.

The saw teeth 2121, as shown in fig. 2 and 4, are provided with the saw teeth 2121 in columns on the inner side of the breaking blade 212, and are arranged in a matrix form in the structure of the lid 2 according to the central axis section of the lid 2 as a focus, the column directions of the saw teeth 2121 and the closed loop formed by the inverted steps 112 are in a perpendicular crossing relation, the slope of the tooth backs of the saw teeth 2121 is matched with the taper slope of the outer curved surface of the reinforcing ring 11, and the tooth backs and the outer curved surface can be in sliding contact to reduce friction, as shown in fig. 4, so that the operation of the lid is labor-saving; in addition, the tooth shape of the saw teeth 2121 is set to be a small wedge angle and a small tooth back angle, so that the locking force can only be generated in one direction, namely, the locking upper cover can not be taken off.

As shown in fig. 4, a circle of arch-shaped groove 23 is arranged between the surrounding upper 21 and the concave dish 22, the outer wall on the bottom of the arch-shaped groove 23 is upwards raised to form a circle of hollow convex ribs, and the inner wall of the arch-shaped groove 23 is provided with a water wave sealing line 231 coil which protrudes towards the center of the groove, so that the sealing performance can be improved.

The soft cushion plate 24 is in a single-plate structure as shown in fig. 2, the soft cushion plate 24 is embedded in the box cover 2 and is abutted against the reinforcing ring 11 as shown in fig. 3 and 4, the edge of the soft cushion plate 24 is provided with an annular peak-valley groove body 241, as shown in fig. 4, a peak groove body 2410 which is profiled with the arch groove 23 and a valley groove body 2412 which is positioned at the outermost edge of the annular peak-valley groove body 241 are positioned inwards, and a funnel-shaped curved surface 2411 is formed at the intersection of the peak groove body 2410 and the valley groove body 2412; when the box cover 2 is buckled on the box body 1 from shallow to deep, the ring opening of the reinforcing ring 11 is contracted inwards relatively to be adhered to one path of the lower part of the funnel-shaped curved surface 2411; as the cover and the box are fastened step by step and are pressed by the groove side of the arched groove 23, which is close to the cover center, the contact between the ring opening of the reinforcing ring 11 and the lower half section of the funnel-shaped curved surface 2411 is tighter and tighter, and as the inner side walls of the funnel-shaped curved surface 2411 and the groove opening of the arched groove 23 are cones, the ring opening is continuously sleeved on the inner side wall of the groove opening of the arched groove 23 along with the funnel-shaped curved surface 2411 until the ring opening is meshed with the funnel-shaped curved surface 2411; the continuously extruded ring mouth takes the engagement part as a wedge mouth and pushes the whole annular peak-valley ditch body 241 to move towards the direction of the cover top until the ring mouth pushes the peak ditch body 2410 to the bottom of the close-fitting arch-shaped groove 23, and the valley ditch body 2412 is pulled by the funnel-shaped curved surface 2411 to be finally leveled, as shown in fig. 5; at this time, the water seal line 231 is embedded in the back wall of the peak groove 2410, resulting in a better sealing effect.

Summarizing, the role of the valley body 2412: the redundant area of a soft elastic material is reserved and released, so that the sealing contact line can be moved along with a longer stroke of the sealing contact line, the sealing contact line is bitten, and the sealing effect is guaranteed in the whole process, the effect is achieved, the lunch box is suitable for being tightly covered at Hou Song, the sealing effect can be guaranteed no matter which layer of saw teeth 2121 are buckled on the box body 1, and the locking effect of each tooth of the saw teeth 2121 can be exerted.

A second embodiment of the invention:

the application of the invention on paper cutlery box is emphasized in the foregoing, as the medium for the paper cutlery box body 1 to clip the upper cover, the reinforcing ring 11 can also be a pressed product of thin metal strips, namely, an open hollow ring is manufactured by punching and spinning the thin metal strips which are cut into sections, and then the butt joint seams are welded and sealed to manufacture the finished product. Referring to fig. 7, the upper view is a cross-sectional view of a single reinforcing ring 11, in which the inner ring wall 114, the outer ring wall 116 and the bottom edge 111 of the reinforcing ring 11 are all of thin-wall structures, the bottom edge 111 is funnel-shaped as a whole, and an assembly seam 115 is left between the bottom edge 111 and the inner ring wall 114, which is the reinforcing ring 11 before assembly.

As can be seen from the lower view of fig. 7, the bottom edge 111 of the reinforcing ring 11 on the box body 1 is in a thin annular shape, the included angle of the inverted step 112 formed by the bottom edge 111 and the outer ring wall 116 is reduced compared with the included angle of the inverted step 112 of the single body shown in the upper view of fig. 7, the annular inner edge of the bottom edge 111 is propped against the outer wall of the box body 1 to be stuck to the inner ring wall 114, the circumferential structural rigidity of the inner ring wall 114 of the reinforcing ring 11 is used as a shield, and the arch squeezing force generated when the bottom edge 111 is folded is used as a biting force, so that the reinforcing ring 11 and the opening edge of the box body 1 are fixedly connected into a whole.

Compared with the previous embodiment, the embodiment omits the adhesive, adopts the assembly mode of machine extrusion, and increases the tool clamp die; the two embodiments have the same box cover 2 and the box body 1 has the characteristics.

Third embodiment of the present invention:

the case body 1 of the cutlery box described above can be divided into a reinforcing ring 11 and a body cleaning part of the case body 1, and the two parts are respectively single before assembly, and as can be seen from fig. 8, the embodiment describes the structural characteristics that the whole case body 1 including the reinforcing ring 11 is a connected body, so that the arrangement is not only the technical practice based on the thermoplastic integral molding process, but also the innovative practice of the disposable exclusive snack box which is combined with the case cover 2 described above and aims to provide convenience, high efficiency, safety and reliability.

The third embodiment is simpler in shape and structure than the first two embodiments.

Specifically, the principle of operation is approximately as follows:

1. cover

As shown in the left diagram of fig. 9, after the food is contained, the lid 2 is held by hand and buckled to the reinforcing ring 11 on the box body 1, and then the lid 2 is pressed down, the saw teeth 2121 can hear the sound of engaging the inverted step 112 on the reinforcing ring 11, and if the environment is noisy, the buckling condition can be sensed by the vibration conducted by the lid 2 to the hand; because the box cover 2 is of a shell structure as a whole, the saw teeth 2121 are arranged in a longitudinal row, and the teeth firstly contacted with the box body 1 are the teeth farthest from the core of the shell structure, and the rigidity of the tooth root is relatively weaker, the box cover 2 can be buckled with the box body 1 with smaller force; because the valley 2412 is stretched to be used as a sealing support in the whole process, an operator can seal whatever saw tooth 2121 is covered when finishing the sealing; in addition, the shallow buckling or deep buckling of the box cover 2 can be determined according to the filling or the shortage of food contained in the cutlery box, so that the space in the cutlery box is reasonably utilized.

2. Box taking

As shown in the upper diagram of fig. 9, the palm is upward, the index finger and the middle finger are inserted into the bottom of the cutlery box through the hand notch 12, the tiger mouth is opened, and the thumb is buckled with the convex rib of the outer wall of the arch groove 23 on the side of the box cover 2, so that the cutlery box can be lifted; the finger at the bottom of the box contacts with the hand protection edge 121, which is an ergonomic molding part and can reduce the load feeling of hands.

3. Cover opening

As shown in the right diagram of fig. 9, the thenar of the palm root presses on the lid 2, the bending fingers buckle the bottom edge of the breaking piece 212, the lid 2 is used as a fulcrum, the wrist force is combined with the finger force, the breaking piece 212 can be pulled up to break the pre-indentation 210, the breaking piece 212 carries the saw teeth 2121 to skim outwards, the saw teeth 2121 are unhooked from the inverted step 112, and the above actions are repeated to finish the opening.

So far, it will be understood by those skilled in the art that the individual technical features of the above embodiments may be combined with each other without interference and contradiction.

In the description of the present specification, terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "front", "back", "top section", "middle", "bottom section", etc. indicate an orientation or a positional relationship based on the orientation or the positional relationship between the elements being described, are merely for convenience of describing the present invention and simplifying language, and do not indicate or imply that the apparatus or elements being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Claims

1. A disposable exclusive snack box, which comprises,

the box body is characterized in that a surrounding reinforcing ring is arranged at the edge of the opening of the box body;

the box cover is characterized in that a surrounding wall formed by connecting a plurality of lower buckling edges with a plurality of breaking-off blades in an alternate and spaced arrangement and a concave dish are arranged on the top of the box cover.

2. The disposable, dedicated snack box of claim 1 wherein said reinforcement loop outer curved surface meets with said bottom ledge to form a one-stage inverted step.

3. The disposable dedicated snack box of claim 1 wherein said reinforcing ring has an annular groove for wrapping said open edge of said body and wherein said inner wrapping surface of said annular groove is an inverted cone.

4. A disposable, proprietary snack box according to claim 3 wherein the inner and outer wrapping faces of said annular groove are provided with corrugated flutes.

5. The disposable dedicated snack box as claimed in claim 1, wherein a pre-indentation is provided at a connection portion between the lower button edge and the breaking piece, and the lower button edge and the breaking piece are connected to each other and folded into the surrounding wall through the connection of the pre-indentation.

6. The disposable dedicated snack box of claim 5 wherein said pre-embossed lines are angled with respect to the overall plane of said lid, said pre-embossed lines having flared ends.

7. The disposable, dedicated snack box of claim 1 wherein said inside of said breaking tabs are provided with serrations.

8. The disposable dedicated snack box of claim 1 wherein a ring of arcuate grooves is provided between said surrounding walls and said dish, said arcuate grooves being provided with water seal lines.

9. The disposable dedicated snack box of claim 1 wherein said cover has a soft pad on an inner surface thereof, wherein said soft pad has an annular peak-valley body on a rim thereof.

10. A disposable proprietary snack box as claimed in claim 9, wherein the contact of the soft pad with the corresponding body, including the contact with the reinforcement ring, is sealed while being movable.

11. The disposable dedicated snack box according to any one of claims 1-2 and 5-9, wherein the soft cushion plate carried by the box cover can perform cover extrusion on the corresponding ring opening of the reinforcing ring on the box body, and the ring opening is also opposite to the ring opening to extrude the annular peak valley body and the arched groove behind the annular peak valley body, and drives the saw teeth on the inner side of the breaking piece to slide through the outer curved surface of the reinforcing ring by utilizing the inclined plane of the tooth back, so that the tooth tips are buckled into and engaged with the inverted step under the action of elasticity, thereby achieving the fit tight fit of the box cover and the box body.

12. The disposable dedicated snack box of claim 1 wherein the outer wall of said body has a hand notch in the lower section of said bottom panel.

13. The disposable, dedicated snack box of claim 12 wherein said hand notch has a hand guard edge along said edge.