阅读说明：本技术 一种公路用路面印刷标线设备 (Road surface printing marking equipment for highway ) 是由 黄峰 于 2020-12-07 设计创作，主要内容包括：本发明涉及一种印刷标线设备,尤其涉及一种公路用路面印刷标线设备。提供一种工作效率高和精确度高的公路用路面印刷标线设备。提供了这样一种公路用路面印刷标线设备,包括有支撑板和连接架,连接架底部两侧均设有支撑板；滚轮,支撑板上均对称转动式设有滚轮；第一支撑架,一侧的支撑板顶部中间设有第一支撑架；第二支撑架,一侧的支撑板顶部中间设有第二支撑架；把手,第一支撑架与第二支撑架相互远离一侧上部均设有把手；伺服电机,第一支撑架顶部设有伺服电机。通过驱动组件、移动组件、下料组件和印刷组件的配合,能够自动将涂料均匀的涂抹在路面上,不需要人们手动给路面印刷标线,提高人们的工作效率。(The invention relates to marking printing equipment, in particular to road surface marking printing equipment for a highway. The road surface marking device for the highway is high in working efficiency and high in accuracy. The road surface marking printing equipment for the highway comprises a supporting plate and a connecting frame, wherein the supporting plate is arranged on each of two sides of the bottom of the connecting frame; the supporting plates are symmetrically and rotatably provided with rollers; the middle of the top of the supporting plate at one side is provided with a first supporting frame; the middle of the top of the supporting plate at one side is provided with a second supporting frame; the upper parts of the sides, away from each other, of the first support frame and the second support frame are respectively provided with a handle; the servo motor is arranged at the top of the first support frame. Through the cooperation of drive assembly, removal subassembly, unloading subassembly and printing component, can be automatic with even the painting on the road surface of coating, do not need people to give road surface printing marking manually, improve people's work efficiency.)

1. A road surface marking device for a road is characterized by comprising:

the supporting plate (1) is arranged on the two sides of the bottom of the connecting frame (3);

the rollers (2) are symmetrically and rotatably arranged on the supporting plate (1);

the middle of the top of the supporting plate (1) on one side of the first supporting frame (4) is provided with the first supporting frame (4);

the middle of the top of the supporting plate (1) on one side of the second supporting frame (401) is provided with the second supporting frame (401);

the upper parts of the sides, away from each other, of the first support frame (4) and the second support frame (401) are respectively provided with a handle (5);

the servo motor (6) is arranged at the top of the first support frame (4);

the driving component (7) is arranged between the first support frame (4) and the upper part of the second support frame (401);

the moving component (8) is arranged between the connecting frame (3) and the driving component (7);

the blanking component (9) is arranged on the moving component (8);

the printing component (10) is arranged on the printing component (10) and the blanking component (9).

2. A road marking apparatus as claimed in claim 1, wherein the drive assembly (7) comprises:

the screw rod (702) is rotatably arranged between the upper part of the first support frame (4) and the upper part of the second support frame (401);

the transmission wheel (701) is arranged on the output shaft of the servo motor (6) and the side part of the screw rod (702);

the belt (703) is arranged between the driving wheels (701);

the first nut (704) is arranged on the screw rod (702) in a threaded mode;

the movable frame (705) is arranged at the bottom of the first nut (704).

3. A road marking apparatus as claimed in claim 2, wherein the moving assembly (8) comprises:

the sliding sleeve (804) is arranged on each of the two sides of the lower part of the movable frame (705);

the sliding rods (803) are arranged on the sliding sleeves (804) in a sliding manner;

the storage frame (801) for placing the coating is arranged between the bottoms of the sliding rods (803);

the upper parts of two sides of the pulley (802) and the material storage frame (801) are respectively provided with the pulley (802), and the pulleys (802) roll on the top of the connecting frame (3).

4. A road marking apparatus as claimed in claim 3, wherein the blanking unit (9) comprises:

the rotating shaft (901) is rotatably arranged at the lower part of the storage frame (801);

the rotating baffle (902) is arranged on the rotating shaft (901);

torsion springs (903) are arranged between the two sides of the upper part of the rotating baffle (902) and the lower part of the material storage frame (801), and the torsion springs (903) are sleeved on the outer sides of the rotating shafts (901);

the contact rods (904) are arranged on two sides of the rotating shaft (901);

the contact frame (905) is arranged in the middle of two sides of the bottom of the connecting frame (3), and the contact frame (905) is matched with the contact rod (904).

5. A road marking apparatus as claimed in claim 4, wherein the printing unit (10) comprises:

a fixed frame (1001), wherein the lower part of the outer side of the material storage frame (801) is provided with the fixed frame (1001);

the lower parts of two sides of the fixed frame (1001) are both provided with the scrapers (1002) of the printing marked lines in a sliding way;

first spring (1003), be equipped with first spring (1003) between scraper blade (1002) upper portion both sides and fixed frame (1001) bottom, first spring (1003) all overlaps in scraper blade (1002) outside.

6. A road marking apparatus as claimed in claim 5, further comprising an adjustment assembly (11), the adjustment assembly (11) comprising:

the wedge-shaped nuts (1103) are arranged on two sides inside the scraper (1002) in a sliding manner;

the driving shaft (1101) is arranged between the upper parts of the wedge nuts (1103) in a threaded mode, and the driving shaft (1101) is connected with the scraper (1002) on the same side in a sliding and rotating mode;

the knob (1102) is arranged at both ends of the driving shaft (1101).

7. The pavement marking apparatus according to claim 6, further comprising a stabilizing assembly (12), wherein the stabilizing assembly (12) comprises:

the lower parts of the sides, away from each other, of the first support frame (4) and the second support frame (401) are respectively provided with a support block (1201);

the supporting blocks (1201) are all provided with sleeves (1202) in a sliding mode;

the second springs (1203) are arranged between the two sides of the upper part of the sleeve (1202) and the tops of the supporting blocks (1201) on the same side, and the second springs (1203) are sleeved on the outer sides of the sleeve (1202) on the same side;

the friction plates (1204) are arranged on the lower sides inside the sleeves (1202) in a sliding manner;

the third spring (1205), the third spring (1205) is set between the two sides of the top of the friction plate (1204) and the inside of the sleeve (1202) on the same side;

the lower parts of the sleeves (1202) are all provided with wedge-shaped rods (1206) in a sliding way;

a fourth spring (1207), wherein the fourth spring (1207) is arranged between one side of the wedge-shaped rod (1206) and the lower part of the sleeve (1202);

the middle parts of the sides, away from each other, of the support plates (1) are respectively provided with a fixed block (1208), and the fixed blocks (1208) are matched with the wedge-shaped rods (1206);

the pedals (1209) are arranged at the lower parts of the sleeves (1202).

8. A road marking apparatus as claimed in claim 6, wherein the drive shaft (1101) is cylindrical in shape.

Technical Field

The invention relates to marking printing equipment, in particular to road surface marking printing equipment for a highway.

Background

The existing roads have a plurality of marked lines, and different marked lines represent different meanings, such as: 1. the flow guide line is used for channeling traffic and making traffic flow more orderly; 2. the approaching barrier marking line is mainly used for reminding a driver of barriers on the road in front of the driver; 3. the deceleration marked line is used for reminding the driver of paying attention to deceleration; 4. the variable guide lane mainly appears at the intersection, can change the driving direction of the lane and relieve traffic pressure; 5. and the distance confirmation lane reminds the driver to keep a safe distance with the front vehicle.

The marked lines on the road are printed manually, but people cannot master the direction easily when the marked lines are printed, the accuracy is not high, the marked lines are easily printed wrongly, and the working efficiency of manually printing the marked lines is not high, so that the pavement marking printing equipment for the road with high working efficiency and high accuracy needs to be designed to solve the problems.

Disclosure of Invention

The invention aims to provide road marking printing equipment for a highway, which has high working efficiency and high accuracy and overcomes the defects of low working efficiency and low accuracy of manual marking printing.

The technical scheme is as follows: a road marking apparatus for a road comprising:

the supporting plates are arranged on two sides of the bottom of the connecting frame;

the supporting plates are symmetrically and rotatably provided with rollers;

the middle of the top of the supporting plate at one side is provided with a first supporting frame;

the middle of the top of the supporting plate at one side is provided with a second supporting frame;

the upper parts of the sides, away from each other, of the first support frame and the second support frame are respectively provided with a handle;

the servo motor is arranged at the top of the first support frame;

the driving component is arranged between the upper parts of the first support frame and the second support frame;

the moving assembly is arranged between the connecting frame and the driving assembly;

the moving assembly is provided with a feeding assembly;

printing component is equipped with on the unloading subassembly printing component.

As a further preferred aspect, the driving assembly comprises:

the screw rod is rotatably arranged between the upper part of the first support frame and the upper part of the second support frame;

the output shaft of the servo motor and the side part of the screw rod are provided with driving wheels;

a belt is arranged between the driving wheels;

the first nut is arranged on the screw rod in a threaded manner;

the movable frame is arranged at the bottom of the first nut.

As a further preferable mode, the moving member includes:

the sliding sleeves are arranged on two sides of the lower part of the movable frame;

the sliding rods are arranged on the sliding sleeves in a sliding manner;

the storage frame is arranged between the bottoms of the sliding rods and used for placing paint;

the pulleys are arranged on the upper portions of the two sides of the material storage frame and roll on the top of the connecting frame.

As a further preferable scheme, the blanking assembly comprises:

the lower part of the material storage frame is rotatably provided with a rotating shaft;

the rotating baffle is arranged on the rotating shaft;

torsion springs are arranged between both sides of the upper part of the rotating baffle and the lower part of the material storage frame, and are sleeved outside the rotating shaft;

the contact rods are arranged on the two sides of the rotating shaft;

the contact frame is arranged in the middle of two sides of the bottom of the connecting frame and matched with the contact rod.

As a further preferred solution, the printing element comprises:

the lower part of the outer side of the storage frame is provided with a fixed frame;

the lower parts of the two sides of the fixed frame are both provided with scrapers for printing marked lines in a sliding manner;

first springs are arranged between two sides of the upper portion of the scraper and the bottom of the fixed frame, and the first springs are sleeved on the outer sides of the scraper.

As a further preferable scheme, the device further comprises an adjusting component, and the adjusting component comprises:

the two sides inside the scraper are both provided with wedge-shaped nuts in a sliding manner;

the driving shaft is arranged between the upper parts of the wedge-shaped nuts in a threaded manner and is connected with the scraping plates on the same side in a sliding and rotating manner;

the knob, drive shaft both ends all are equipped with the knob.

As a further preferable scheme, the fixing device further comprises a fixing component, wherein the fixing component comprises:

the lower parts of the sides, away from each other, of the first support frame and the second support frame are provided with support blocks;

the supporting blocks are all provided with sleeves in a sliding manner;

the second springs are arranged between the two sides of the upper part of the sleeve and the tops of the supporting blocks on the same side, and the second springs are sleeved outside the sleeve on the same side;

the lower sides in the sleeves are provided with friction plates in a sliding manner;

the third spring is arranged between the two sides of the top of the friction plate and the inner part of the sleeve at the same side;

the lower parts of the sleeves are both provided with wedge-shaped rods in a sliding manner;

a fourth spring is arranged between one side of the wedge-shaped rod and the lower part of the sleeve;

the middle parts of the sides, far away from each other, of the supporting plates are provided with fixing blocks, and the fixing blocks are matched with the wedge-shaped rods;

the pedal is arranged at the lower part of the sleeve.

As a further preferred solution, the drive shaft is cylindrical in shape.

The invention has the following advantages: 1. through drive assembly, removal subassembly, unloading subassembly and printing component's cooperation, can be automatic with even the painting on the road surface of coating, do not need people to give road surface printing marking manually, improve people's work efficiency to the marking accuracy of printing is high, can not print the mistake.

2. Through adjusting part, can control the thickness of printing the marking according to different demands.

3. Through the stabilizing assembly, the position of the whole equipment can be stabilized and the equipment is prevented from moving when the equipment prints the marked line.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

FIG. 2 is a schematic diagram of a first partial structure according to the present invention.

FIG. 3 is a second partial structure diagram and a cross-sectional view of the present invention.

Fig. 4 is a third partial structural schematic view and a sectional view of the present invention.

FIG. 5 is an enlarged view of part A of the present invention.

Fig. 6 is a fourth partial structural schematic view and a sectional view of the present invention.

Wherein: 1-supporting plate, 2-roller, 3-connecting frame, 4-first supporting frame, 401-second supporting frame, 5-handle, 6-servo motor, 7-driving component, 701-driving wheel, 702-screw rod, 703-belt, 704-first nut, 705-movable frame, 8-moving component, 801-storage frame, 802-pulley, 803-sliding rod, 804-sliding sleeve, 9-blanking component, 901-rotating shaft, 902-rotating baffle, 903-torsion spring, 904-contact rod, 905-contact frame, 10-printing component, 1001-fixing frame, 1002-scraper, 1003-first spring, 11-adjusting component, 1101-driving shaft, 1102-knob, 1103-wedge nut, 12-stabilizing assembly, 1201-support block, 1202-sleeve, 1203-second spring, 1204-friction plate, 1205-third spring, 1206-wedge bar, 1207-fourth spring, 1208-fixed block, 1209-pedal.

Detailed Description

The following further describes the technical solution with reference to specific embodiments, and it should be noted that: the words upper, lower, left, right, and the like used herein to indicate orientation are merely for the location of the illustrated structure in the corresponding figures. The serial numbers of the parts are themselves numbered herein, for example: first, second, etc. are used solely to distinguish one from another as to objects described herein, and do not have any sequential or technical meaning. The application states that: the connection and coupling, unless otherwise indicated, include both direct and indirect connections (couplings).

Example 1

A road surface marking printing device for a road comprises a supporting plate 1, rollers 2, a connecting frame 3, a first supporting frame 4, a second supporting frame 401, a handle 5, a servo motor 6, a driving component 7, a moving component 8, a blanking component 9 and a printing component 10, wherein the supporting plate 1 is arranged on the left side and the right side of the bottom of the connecting frame 3, the rollers 2 are symmetrically and rotatably arranged on the supporting plate 1 in a front-back symmetrical mode, the first supporting frame 4 is arranged in the middle of the top of the supporting plate 1 on the right side, the second supporting frame 401 is arranged in the middle of the top of the supporting plate 1 on the left side, the handles 5 are arranged on the upper portions of the sides, away from each other, of the first supporting frame 4 and the second supporting frame 401, the servo motor 6 is arranged on the top of the first supporting frame 4, the driving component 7 is arranged between the upper portions of the first supporting frame 4 and the, the blanking assembly 9 is provided with a printing assembly 10.

When people need print the marked line on the road, hold handle 5 with the hand, under the effect of gyro wheel 2, promote whole equipment to the place that needs the printing marked line, then put the coating after the heating on removing subassembly 8, restart servo motor 6, servo motor 6 output shaft drives drive assembly 7 operation, drive assembly 7 drives and removes subassembly 8 from right side left side movement, remove subassembly 8 and drive unloading subassembly 9 and printing subassembly 10 from right side left side movement, unloading subassembly 9 will remove the coating on the subassembly 8 and transmit to the road surface on, printing subassembly 10 paints evenly with the coating on the road surface, then close servo motor 6 can.

Example 2

Based on embodiment 1, as shown in fig. 1, 2 and 3, the driving assembly 7 includes a driving wheel 701, a screw 702, a belt 703, a first nut 704 and a movable frame 705, the screw 702 is rotatably disposed between the upper portion of the first support frame 4 and the upper portion of the second support frame 401, the driving wheel 701 is disposed on the output shaft of the servo motor 6 and the right portion of the screw 702, the belt 703 is disposed between the driving wheels 701, the first nut 704 is threadedly disposed on the screw 702, and the movable frame 705 is disposed at the bottom of the first nut 704.

After people start servo motor 6, control servo motor 6 corotation, servo motor 6 output shaft drives the drive wheel 701 of upside and rotates, thereby drive belt 703 and the drive wheel 701 rotation of downside, the drive wheel 701 of downside drives lead screw 702 and rotates, lead screw 702 drives first nut 704 and moves left, first nut 704 drives adjustable shelf 705 and moves left, thereby drive removal subassembly 8, unloading subassembly 9 and printing component 10 move left, unloading subassembly 9 transmits the coating on the removal subassembly 8 on the road surface, printing component 10 is with even the paining on the road surface of road surface coating, then control servo motor 6 reversal, thereby make first nut 704 and adjustable shelf 705 move right and reset, then close servo motor 6 can.

The moving assembly 8 comprises a storage frame 801, pulleys 802, sliding rods 803 and sliding sleeves 804, the sliding sleeves 804 are arranged on the left side and the right side of the lower portion of the movable frame 705, the sliding rods 803 are arranged on the sliding sleeves 804 in a sliding mode, the storage frame 801 is arranged between the bottoms of the sliding rods 803, the pulleys 802 are arranged on the upper portions of the front side and the rear side of the storage frame 801, and the pulleys 802 roll on the top of the connecting frame 3.

When people need to print marked lines on a road, the heated paint is placed on the storage frame 801, when the movable frame 705 moves leftwards, the storage frame 801, the pulley 802, the sliding rod 803 and the sliding sleeve 804 are driven to move leftwards, the pulley 802 is driven to move downwards under the action of the connecting frame 3, the pulley 802 drives the storage frame 801 and the sliding rod 803 to move downwards, when the connecting frame 3 drives the pulley 802 to move upwards to reset, the pulley 802 drives the storage frame 801 and the sliding rod 803 to move upwards to reset, and when the movable frame 705 moves rightwards to reset, the storage frame 801, the pulley 802, the sliding rod 803 and the sliding sleeve 804 are driven to move rightwards to reset.

Unloading subassembly 9 is including pivot 901, whirl baffle 902, torsion spring 903, contact bar 904 and contact frame 905, storage frame 801 lower part rotary type is equipped with pivot 901, be equipped with whirl baffle 902 on the pivot 901, both sides all are equipped with torsion spring 903 between the storage frame 801 lower part around whirl baffle 902 upper portion, torsion spring 903 all overlaps in the pivot 901 outside, both sides all are equipped with contact bar 904 around on the pivot 901, both sides all are equipped with contact frame 905 around the link 3 bottom, contact frame 905 and the cooperation of contact bar 904.

Because the rotating baffle 902 blocks the bottom of the storage frame 801, the paint in the storage frame 801 cannot fall down, when the storage frame 801 moves to the left, the rotating shaft 901, the rotating baffle 902, the torsion spring 903 and the contact rod 904 are driven to move to the left, when the storage frame 801 moves to the down, the rotating shaft 901, the rotating baffle 902, the torsion spring 903 and the contact rod 904 are driven to move down, when the contact rod 904 is in contact with the contact frame 905, the contact rod 904 is driven to rotate, the contact rod 904 drives the rotating shaft 901 and the rotating baffle 902 to rotate, at this time, the rotating baffle 902 no longer blocks the bottom of the storage frame 801, the paint in the storage frame 801 falls down to the ground, meanwhile, the printing component 10 uniformly coats the paint on the road surface, when the storage frame 801 moves upwards to reset, the rotating shaft 901, the rotating baffle, the torsion spring 903 and the contact rod 904 are driven to move upwards to reset, at this time, the contact rod 904 is separated from the contact frame 905, the torsion spring 903 is restored, and under the action of the torsion spring 903, the contact rod 904, the rotating shaft 901 and the rotating baffle 902 are driven to rotate and reset, so that the rotating baffle 902 blocks the bottom of the storage frame 801 again, the paint in the storage frame 801 does not fall out any more, and when the storage frame 801 moves rightwards and resets, the rotating shaft 901, the rotating baffle 902, the torsion spring 903 and the contact rod 904 are driven to move rightwards and reset.

Example 3

In addition to embodiment 2, as shown in fig. 3, 4, 5 and 6, the printing unit 10 includes a fixing frame 1001, a squeegee 1002 and a first spring 1003, the fixing frame 1001 is provided at a lower portion of an outer side of the storage frame 801, the squeegees 1002 are slidably provided at lower portions of left and right sides of the fixing frame 1001, the first spring 1003 is provided between upper front and rear sides of the squeegee 1002 and a bottom of the fixing frame 1001, and the first spring 1003 is fitted to an outer side of the squeegee 1002.

When storage frame 801 down moved, drive fixed frame 1001, scraper blade 1002 and first spring 1003 down moved, when fixed frame 1001 and road surface contact, storage frame 801 stops down moving, when storage frame 801 down left movement simultaneously, drive fixed frame 1001, scraper blade 1002 and first spring 1003 down left movement, then the coating on the road surface is paintd evenly to scraper blade 1002, when storage frame 801 up moved and resets, drive fixed frame 1001, scraper blade 1002 and first spring 1003 up moved and resets, when storage frame 801 right moved and resets, drive fixed frame 1001, scraper blade 1002 and first spring 1003 down moved and reset.

Still including adjusting part 11, adjusting part 11 is including drive shaft 1101, knob 1102 and wedge nut 1103, and both sides all are slided around the scraper blade 1002 is equipped with wedge nut 1103, and the screw thread formula is equipped with drive shaft 1101 between the wedge nut 1103 upper portion, and drive shaft 1101 all slides and the rotation type with the scraper blade 1002 of homonymy and is connected, and both ends all are equipped with knob 1102 around the drive shaft 1101.

When people need adjust the thickness of printing marking, can be through rotating knob 1102, knob 1102 drives drive shaft 1101 and rotates, thereby it slides to drive the reciprocal inside and outside of wedge nut 1103, when toward wedge nut 1103 toward the inboard motion, wedge nut 1103 drives scraper blade 1002 downstream, first spring 1003 is tensile, at this moment, the marking thickness of printing is thinner, when wedge nut 1103 toward the outside motion, first spring 1003 reconversion, under the effect of first spring 1003, drive scraper blade 1002 up-motion, at this moment, the marking thickness of printing is thicker.

The fixing component 12 is further included, the fixing component 12 includes a supporting block 1201, a sleeve 1202, a second spring 1203, a friction plate 1204, a third spring 1205, a wedge-shaped rod 1206, a fourth spring 1207, a fixing block 1208 and a pedal 1209, the supporting block 1201 is respectively arranged at the lower parts of the sides of the first supporting frame 4 and the second supporting frame 401 away from each other, the sleeve 1202 is respectively arranged on the supporting block 1201 in a sliding manner, the second spring 1203 is respectively arranged between the front side and the rear side of the upper part of the sleeve 1202 and the top of the supporting block 1201 at the same side, the second spring 1203 is respectively sleeved outside the sleeve 1202 at the same side, the friction plate 1204 is respectively arranged at the lower side inside the sleeve 1202 in a sliding manner, the third spring 1205 is respectively arranged between the front side and the rear side of the top of the friction plate 1204 and the inside the sleeve 1202 at the same side, the wedge-shaped rod 1206 is respectively arranged at the lower part of, the fixed block 1208 is engaged with the wedge 1206, and the lower portion of the sleeve 1202 is provided with a pedal 1209.

After people push the whole equipment to the place where the marked lines need to be printed, the pedal 1209 is stepped downwards, the pedal 1209 drives the sleeve 1202, the wedge-shaped rod 1206 and the fourth spring 1207 to move downwards, the second spring 1203 is compressed, when the wedge-shaped rod 1206 is contacted with the fixed block 1208, the wedge-shaped rod 1206 is driven to move towards the side away from each other, the fourth spring 1207 is stretched, when the wedge-shaped rod 1206 is separated from the fixed block 1208, the fourth spring 1207 is restored to the original state, under the action of the fourth spring 1207, the wedge-shaped rod 1206 is driven to move towards the side close to each other and reset, meanwhile, the pedal 1209 is contacted with the friction plate 1204 to drive the friction plate 1204 to move downwards, the third spring 1205 is stretched, when the friction plate 1204 is contacted with the road surface, the friction plate 1204 stops moving, then the pedal 1209 is released, the fixed block 1208 catches the wedge-shaped rod 1206, the wedge-shaped rod 1206 cannot move upwards and reset, under the action of the, after the marking line is printed, the manual pulling wedge pole 1206 is toward moving away from one side each other, the fourth spring 1207 is tensile, when the wedge pole 1206 is separated from the fixed block 1208, the second spring 1203 reconversion, under the effect of second spring 1203, drive footboard 1209, the sleeve 1202, wedge pole 1206 and fourth spring 1207 move up and reset, then loosen the wedge pole 1206, fourth spring 1207 reconversion, under the effect of fourth spring 1207, it resets to drive the wedge pole 1206 toward being close to one side motion each other, footboard 1209 separates with friction plate 1204 simultaneously, third spring 1205 reconversion, under the effect of third spring 1205, it resets to drive the upward motion of friction plate 1204.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.