CN211968868U - Printing ink heating device for printing - Google Patents

Printing ink heating device for printing Download PDF

Info

Publication number
CN211968868U
CN211968868U CN201922109775.3U CN201922109775U CN211968868U CN 211968868 U CN211968868 U CN 211968868U CN 201922109775 U CN201922109775 U CN 201922109775U CN 211968868 U CN211968868 U CN 211968868U
Authority
CN
China
Prior art keywords
heating
sprocket
fixedly connected
supporting
printing ink
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201922109775.3U
Other languages
Chinese (zh)
Inventor
蔡曼燕
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Zhonglue Printing And Packaging Co ltd
Original Assignee
Shenzhen Zhonglue Printing And Packaging Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Zhonglue Printing And Packaging Co ltd filed Critical Shenzhen Zhonglue Printing And Packaging Co ltd
Priority to CN201922109775.3U priority Critical patent/CN211968868U/en
Application granted granted Critical
Publication of CN211968868U publication Critical patent/CN211968868U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Accessories For Mixers (AREA)

Abstract

The embodiment of the utility model discloses a printing ink heating device for printing, in particular to the technical field of printing ink heating, which comprises two supporting seats, wherein heating mechanisms are arranged inside the two supporting seats, and one end of each heating mechanism extends to the outer sides of the tops of the two supporting seats; the heating mechanism comprises a heating box, and supporting blocks are fixedly connected to two sides of the heating box. The utility model discloses a set up the transmission shaft, first sprocket, the second sprocket, first bevel gear, second bevel gear, the third sprocket, fourth sprocket and eccentric wheel, motor work drives and can drive the eccentric wheel simultaneously after the transmission shaft rotates and rotate, make the supporting shoe drive the heating cabinet and constantly slide from top to bottom, simultaneously through setting up a plurality of stirring rods in the transmission shaft outside and setting up a plurality of electric heating coil inside the heating cabinet, can guarantee that the inside printing ink of heating cabinet is in the active state always when the heating, thereby make printing ink be heated more evenly, heating efficiency is higher.

Description

Printing ink heating device for printing
Technical Field
The embodiment of the utility model provides a printing ink heating technology field, concretely relates to printing ink heating device is used in printing.
Background
In the printing field, ink printing is commonly adopted to present information such as image, color, pattern and the like of a product, and the viscosity and the fluidity of the ink influence the printing effect of the ink. At present, printing ink generally is stored through barreled mode, however, in low temperature environment especially in winter, because the temperature is very low, printing ink viscosity grow, mobility becomes slow can freeze the sclerosis even and can't normally use, and cause printed matter colour and effect often can not reach the design requirement, and traditional printing ink heating device is when heating printing ink, often all adopt heating pipe or heating coil directly to heating printing ink, this kind of heating form printing ink is in the state of stewing always, printing ink can't be heated evenly fast during the heating, lead to its heating efficiency lower, it is more of a specified duration to heat.
Therefore, it is necessary to provide a printing ink heating apparatus.
SUMMERY OF THE UTILITY MODEL
Therefore, the embodiment of the utility model provides a printing ink heating device is used in printing, through setting up the transmission shaft, first sprocket, the second sprocket, first bevel gear, second bevel gear, the third sprocket, fourth sprocket and eccentric wheel, motor work drives and can drive the eccentric wheel simultaneously after the transmission shaft rotates and rotate, make the supporting shoe drive the heating cabinet constantly slide from top to bottom, simultaneously through setting up a plurality of puddlers in the transmission shaft outside and setting up a plurality of electric heating coil in the heating cabinet inside, can guarantee that the inside printing ink of heating cabinet is in the active state always when heating, thereby make printing ink be heated more evenly, heating efficiency is higher, because printing ink often all stands motionlessly among the solution prior art, lead to printing ink to be heated inhomogeneously, the problem that heating efficiency is low.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions: a printing ink heating device for printing comprises two supporting seats, wherein heating mechanisms are arranged inside the two supporting seats, and one ends of the heating mechanisms extend to the outer sides of the tops of the two supporting seats;
the heating mechanism comprises a heating box, supporting blocks are fixedly connected to two sides of the heating box, square grooves are formed in the inner side surfaces of the two supporting seats, the supporting blocks are located in the square grooves, supporting frames are fixedly connected to the tops of the two supporting seats, top covers are fixedly connected to the bottoms of the supporting frames, motors are fixedly connected to the tops of the supporting frames, transmission shafts are fixedly connected to output shafts of the motors, the bottom ends of the transmission shafts sequentially penetrate through the supporting frames and the top covers and extend into the heating box, a plurality of stirring rods are fixedly connected to the outer sides of the transmission shafts, supporting plates are fixedly connected to the inner walls of two sides of the heating box, a plurality of supporting rods are fixedly connected to the inner sides of the two supporting plates, electric heating coils are fixedly connected to the inner sides of the plurality of supporting rods, the first chain wheel is positioned at the top of the top cover, the two sides of the first chain wheel are respectively provided with a second chain wheel, the inner side of the second chain wheel is fixedly sleeved with a first rotating shaft, the bottom end of the first rotating shaft is fixedly connected with a first bevel gear, the bottom of the first bevel gear is provided with a second bevel gear, the second bevel gear is meshed with the first bevel gear, the outer sides of the two second bevel gears are respectively fixedly connected with a second rotating shaft, the outer side of the second rotating shaft is fixedly sleeved with a third chain wheel, the bottom of the two supporting blocks is respectively provided with an eccentric wheel, the inner sides of the two eccentric wheels are respectively fixedly sleeved with a third rotating shaft, the outer side of the third rotating shaft is fixedly sleeved with a fourth chain wheel, the two fourth chain wheels are respectively positioned at the outer sides of the two eccentric wheels, the outer sides of the first chain wheel and the, and a second chain is sleeved on the outer sides of the third chain wheel and the fourth chain wheel, and the third chain wheel and the fourth chain wheel are connected through the second chain.
Further, the inner walls of the front side and the rear side of the square grooves are provided with sliding grooves, sliding blocks are fixedly connected to the front side and the rear side of the supporting block, the sliding blocks are located inside the sliding grooves, and the sliding blocks are matched with the sliding grooves.
Furthermore, a plurality of stirring rods and electric heating coils are alternately distributed at intervals.
Furthermore, a groove is formed in the bottom of the top cover, a convex ring is fixedly connected to the top of the heating box, and the top end of the convex ring extends into the groove.
Furthermore, the top of the supporting block is fixedly connected with a spring, and the top end of the spring is fixedly connected with the supporting seat.
Furthermore, the joints of the transmission shaft and the support frame and the top cover are movably connected through sealed bearings.
Furthermore, the joints of the first rotating shaft and the second rotating shaft with the support frame are movably connected through a first bearing, and the joints of the third rotating shaft with the support seat are movably connected through a second bearing.
Further, heating cabinet top fixedly connected with inlet pipe, heating cabinet bottom fixedly connected with discharging pipe, all be equipped with the ooff valve on inlet pipe and the discharging pipe.
The embodiment of the utility model provides a have following advantage:
the utility model discloses a set up the transmission shaft, first sprocket, the second sprocket, first bevel gear, second bevel gear, the third sprocket, fourth sprocket and eccentric wheel, motor work drives and can drive the eccentric wheel simultaneously after the transmission shaft rotates and rotate, make the supporting shoe drive the heating cabinet constantly slide from top to bottom, simultaneously through setting up a plurality of stirring rods in the transmission shaft outside and setting up a plurality of electric heating coil inside the heating cabinet, can guarantee that the inside printing ink of heating cabinet is in the active state always when the heating, compared with the prior art, printing ink is heated more evenly, heating efficiency is higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a front view cross-sectional view of the present invention;
FIG. 3 is an enlarged view of the portion A of FIG. 2 according to the present invention;
FIG. 4 is an enlarged view of the structure of the portion B in FIG. 2 according to the present invention;
fig. 5 is a partial side sectional view of the present invention.
In the figure: the device comprises a supporting seat 1, a heating box 2, a supporting block 3, a square groove 4, a supporting frame 5, a top cover 6, a motor 7, a transmission shaft 8, a stirring rod 9, a supporting plate 10, a supporting rod 11, an electric heating coil 12, a first chain wheel 13, a second chain wheel 14, a first rotating shaft 15, a first bevel gear 16, a second bevel gear 17, a second rotating shaft 18, a third chain wheel 19, an eccentric wheel 20, a third rotating shaft 21, a fourth chain wheel 22, a first chain 23, a second chain 24, a sliding block 25, a convex ring 26, a spring 27, a feeding pipe 28 and a discharging pipe 29.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to the attached drawings 1-5 in the specification, the printing ink heating device in the embodiment comprises two supporting seats 1, wherein a heating mechanism is arranged inside the two supporting seats 1, and one end of the heating mechanism extends to the outer sides of the tops of the two supporting seats 1;
the heating mechanism comprises a heating box 2, supporting blocks 3 are fixedly connected to two sides of the heating box 2, square grooves 4 are formed in the inner side surfaces of the two supporting seats 1, the supporting blocks 3 are located in the square grooves 4, supporting frames 5 are fixedly connected to the tops of the two supporting seats 1, top covers 6 are fixedly connected to the bottoms of the supporting frames 5, the top covers 6 are located at the tops of the heating box 2, motors 7 are fixedly connected to the tops of the supporting frames 5, transmission shafts 8 are fixedly connected to output shafts of the motors 7, the bottom ends of the transmission shafts 8 penetrate through the supporting frames 5 and the top covers 6 in sequence and extend into the heating box 2, a plurality of stirring rods 9 are fixedly connected to the outer sides of the transmission shafts 8, supporting plates 10 are fixedly connected to the inner walls of two sides of the heating box 2, a plurality of supporting rods 11 are fixedly connected to the inner sides of the, the outer side of the transmission shaft 8 is fixedly sleeved with a first chain wheel 13, the first chain wheel 13 is positioned at the top of the top cover 6, the two sides of the first chain wheel 13 are respectively provided with a second chain wheel 14, the inner side of the second chain wheel 14 is fixedly sleeved with a first rotating shaft 15, the bottom end of the first rotating shaft 15 is fixedly connected with a first bevel gear 16, the bottom of the first bevel gear 16 is provided with a second bevel gear 17, the second bevel gear 17 is meshed with the first bevel gear 16, the outer sides of the two second bevel gears 17 are respectively fixedly connected with a second rotating shaft 18, the outer side of the second rotating shaft 18 is fixedly sleeved with a third chain wheel 19, the bottoms of the two supporting blocks 3 are respectively provided with eccentric wheels 20, the inner sides of the two eccentric wheels 20 are respectively fixedly sleeved with a third rotating shaft 21, the outer side of the third rotating shaft 21 is fixedly sleeved with, a first chain 23 is sleeved on the outer sides of the first chain wheel 13 and the second chain wheel 14, the first chain wheel 13 and the second chain wheel 14 are connected through the first chain 23, a second chain 24 is sleeved on the outer sides of the third chain wheel 19 and the fourth chain wheel 22, and the third chain wheel 19 and the fourth chain wheel 22 are connected through the second chain 24;
furthermore, sliding grooves are formed in the inner walls of the front side and the rear side of each of the two square grooves 4, sliding blocks 25 are fixedly connected to the front side and the rear side of each of the supporting blocks 3, the sliding blocks 25 are located in the sliding grooves, and the sliding blocks 25 are matched with the sliding grooves, so that the supporting blocks 3 can slide up and down in the square grooves 4;
furthermore, the stirring rods 9 and the electric heating coils 12 are alternately distributed at intervals, which is beneficial to more uniform heating;
furthermore, a groove is formed in the bottom of the top cover 6, a convex ring 26 is fixedly connected to the top of the heating box 2, and the top end of the convex ring 26 extends into the groove, so that the internal sealing of the heating box 2 is kept;
furthermore, the top of the supporting block 3 is fixedly connected with a spring 27, and the top end of the spring 27 is fixedly connected with the supporting seat 1, so that the supporting block 3 is more stable when sliding up and down, and the impact force during sliding is reduced;
furthermore, the joints of the transmission shaft 8 and the support frame 5 and the top cover 6 are movably connected through sealed bearings, which is beneficial to the transmission shaft 8 to rotate in the support frame 5 and the top cover 6;
furthermore, the joints of the first rotating shaft 15 and the second rotating shaft 18 with the support frame 5 are movably connected through a first bearing, and the joints of the third rotating shaft 21 with the support seat 1 are movably connected through a second bearing, which is beneficial to the rotation of the first rotating shaft 15, the second rotating shaft 18 and the third rotating shaft 21 in the support frame 5 and the support seat 1;
further, 2 top fixedly connected with inlet pipes 28 of heating cabinet, 2 bottom fixedly connected with discharging pipes 29 of heating cabinet, all be equipped with the ooff valve on inlet pipes 28 and the discharging pipes 29.
The implementation scenario is specifically as follows: in the practical application of the present invention, when ink needs to be heated, after the ink is inputted into the heating box 2 from the inlet pipe 28, the power is turned on to start the motor 7 and the electric heating coil 12, the motor 7 will first drive the transmission shaft 8 to rotate, so as to rotate the first chain wheel 13, and drive the second chain wheel 14 to rotate through the first chain 23, so as to rotate the first rotating shaft 15 and the first bevel gear 16, and further drive the second rotating shaft 18 and the third chain wheel 19 to rotate by the second bevel gear 17, and drive the fourth chain wheel 22 and the third rotating shaft 21 to rotate by the second chain 24, so as to rotate the eccentric wheels 20, after the two eccentric wheels 20 rotate, the supporting block 3 will be pushed to slide up and down inside the square groove 4 of the supporting seat 1, so as to make the heating box 2 shake up and down inside the two supporting seats 1, the convex ring 26 will also slide up and down inside the groove of the top cover 6, meanwhile, the rotation of a transmission shaft 8 of a motor 7 drives a plurality of stirring rods 9 to rotate rapidly to stir the ink in the heating box 2, meanwhile, a plurality of heat is dissipated by the work of electric heating coils 12 to heat the ink, the rotation of the transmission shaft 8 can drive the rotation of an eccentric wheel 20 simultaneously by arranging the transmission shaft 8, a first chain wheel 13, a second chain wheel 14, a first bevel gear 16, a second bevel gear 17, a third chain wheel 19, a fourth chain wheel 22 and the eccentric wheel 20, so that the supporting block 3 drives the heating box 2 to slide up and down continuously, meanwhile, the plurality of stirring rods 9 are arranged on the outer side of the transmission shaft 8 and the plurality of electric heating coils 12 are arranged in the heating box 2, the ink in the heating box 2 can be ensured to be in a movable state all the time during heating, and therefore, the ink is heated more uniformly, the heating efficiency is higher, and the embodiment particularly solves the problems that the ink is not uniformly heated, the heating efficiency is low.
The working principle is as follows:
referring to the attached drawings 1-5 of the specification, when the motor 7 and the electric heating coil 12 are started by turning on the power supply, the motor 7 firstly drives the transmission shaft 8 to rotate so as to rotate the first chain wheel 13, the second chain wheel 14 is driven to rotate by the first chain 23, the first rotating shaft 15 and the first bevel gear 16 are driven to rotate, the second bevel gear 17 drives the second rotating shaft 18 and the third chain wheel 19 to rotate, the fourth chain wheel 22 and the third rotating shaft 21 are driven to rotate by the second chain 24, so as to rotate the eccentric wheels 20, after the two eccentric wheels 20 rotate, the supporting block 3 is pushed to continuously slide up and down in the square groove 4 of the supporting seat 1, so that the heating box 2 continuously rocks up and down on the inner sides of the two supporting seats 1, the convex ring 26 also slides up and down in the groove of the top cover 6, and simultaneously the transmission shaft 8 of the motor 7 drives the stirring rods 9 to, the ink inside the heating box 2 is stirred, and meanwhile, the electric heating coil 12 works to radiate a large amount of heat to heat the ink.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (8)

1. The utility model provides an ink heating device for printing, includes two supporting seats (1), its characterized in that: a heating mechanism is arranged inside the two supporting seats (1), and one end of the heating mechanism extends to the outer side of the top of each supporting seat (1);
the heating mechanism comprises a heating box (2), supporting blocks (3) are fixedly connected to two sides of the heating box (2), square grooves (4) are formed in the inner side surfaces of the two supporting seats (1), the supporting blocks (3) are located in the square grooves (4), supporting frames (5) are fixedly connected to the tops of the two supporting seats (1), a top cover (6) is fixedly connected to the bottom of each supporting frame (5), the top cover (6) is located at the top of the heating box (2), a motor (7) is fixedly connected to the top of each supporting frame (5), a transmission shaft (8) is fixedly connected to an output shaft of the motor (7), the bottom end of the transmission shaft (8) sequentially penetrates through the supporting frames (5) and the top cover (6) and extends into the heating box (2), a plurality of stirring rods (9) are fixedly connected to the outer side of the transmission shaft (8), and supporting plates (10) are fixedly connected to the, two the inboard a plurality of bracing pieces (11) of all fixedly connected with of backup pad (10), it is a plurality of the inboard an electric heating coil (12) of all fixedly connected with of bracing piece (11), the fixed cover in the transmission shaft (8) outside has first sprocket (13), first sprocket (13) is located top cap (6) top, first sprocket (13) both sides all are equipped with second sprocket (14), the fixed cover in second sprocket (14) inboard has first pivot (15), first pivot (15) bottom fixedly connected with first bevel gear (16), first bevel gear (16) bottom is equipped with second bevel gear (17), second bevel gear (17) and first bevel gear (16) meshing are connected, two the equal fixedly connected with second pivot (18) in second bevel gear (17) outside, the fixed cover in second pivot (18) outside has third sprocket (19), two supporting shoe (3) bottom all is equipped with eccentric wheel (20), two eccentric wheel (20) inboard all is fixed to be cup jointed third pivot (21), the fixed cover in third pivot (21) outside has been cup jointed fourth sprocket (22), two fourth sprocket (22) all is located two eccentric wheel (20) outsides, first sprocket (13) and second sprocket (14) outside all are overlapped and are equipped with first chain (23), first sprocket (13) and second sprocket (14) are connected through first chain (23), third sprocket (19) and fourth sprocket (22) outside all are overlapped and are equipped with second chain (24), third sprocket (19) and fourth sprocket (22) are connected through second chain (24).
2. A printing ink heating apparatus according to claim 1, wherein: the inner walls of the front side and the rear side of the square grooves (4) are provided with sliding grooves, the front side and the rear side of the supporting block (3) are fixedly connected with sliding blocks (25), the sliding blocks (25) are located inside the sliding grooves, and the sliding blocks (25) are matched with the sliding grooves.
3. A printing ink heating apparatus according to claim 1, wherein: the stirring rods (9) and the electric heating coils (12) are alternately distributed at intervals.
4. A printing ink heating apparatus according to claim 1, wherein: the bottom of the top cover (6) is provided with a groove, the top of the heating box (2) is fixedly connected with a convex ring (26), and the top end of the convex ring (26) extends into the groove.
5. A printing ink heating apparatus according to claim 1, wherein: the supporting shoe (3) top fixedly connected with spring (27), spring (27) top and supporting seat (1) fixed connection.
6. A printing ink heating apparatus according to claim 1, wherein: the joints of the transmission shaft (8) and the support frame (5) and the top cover (6) are movably connected through sealed bearings.
7. A printing ink heating apparatus according to claim 1, wherein: the first rotating shaft (15) and the second rotating shaft (18) are movably connected with the supporting frame (5) through first bearings, and the third rotating shaft (21) and the supporting seat (1) are movably connected through second bearings.
8. A printing ink heating apparatus according to claim 1, wherein: heating cabinet (2) top fixedly connected with inlet pipe (28), heating cabinet (2) bottom fixedly connected with discharging pipe (29), all be equipped with the ooff valve on inlet pipe (28) and discharging pipe (29).
CN201922109775.3U 2019-11-29 2019-11-29 Printing ink heating device for printing Active CN211968868U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922109775.3U CN211968868U (en) 2019-11-29 2019-11-29 Printing ink heating device for printing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922109775.3U CN211968868U (en) 2019-11-29 2019-11-29 Printing ink heating device for printing

Publications (1)

Publication Number Publication Date
CN211968868U true CN211968868U (en) 2020-11-20

Family

ID=73354011

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201922109775.3U Active CN211968868U (en) 2019-11-29 2019-11-29 Printing ink heating device for printing

Country Status (1)

Country Link
CN (1) CN211968868U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113645720A (en) * 2021-10-19 2021-11-12 江苏浩睿特种材料研究院有限公司 Heating equipment is used in graphite electrode production

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113645720A (en) * 2021-10-19 2021-11-12 江苏浩睿特种材料研究院有限公司 Heating equipment is used in graphite electrode production
CN113645720B (en) * 2021-10-19 2021-12-17 江苏浩睿特种材料研究院有限公司 Heating equipment is used in graphite electrode production

Similar Documents

Publication Publication Date Title
CN211968868U (en) Printing ink heating device for printing
CN204054872U (en) A kind of photovoltaic module laminating machine
CN210146129U (en) Grinding device is used in exterior wall coating production
CN210206694U (en) Raw material pretreatment device based on modified starch processing
CN216266970U (en) Processing device of natural rubber for tire production
CN208642862U (en) Bitubular feed stuff reducing device suitable for black goat raising
CN203714709U (en) Miniature electronic roller
CN211886422U (en) Printing and dyeing dye stirring device
CN206238198U (en) A kind of noodle device made for moon cake
CN212793867U (en) Synchronous fastening device of plate heat exchanger
CN212704111U (en) Automatic continuous cover turning device
CN109955023B (en) Fan impeller assembly workbench
CN108673322B (en) Planetary wheel type polishing device
CN212701599U (en) Adhesive double-shaft high-speed stirring tank
CN219373698U (en) Weeping forsythia fixation device
CN218689526U (en) Waterproof sealing compound production reation kettle
CN214766618U (en) Servo motor fast pre-heating glue pouring equipment
CN218146359U (en) Constant-temperature preheating furnace equipment for glass processing
CN211546480U (en) Air-cooled rice cooling machine
CN211034054U (en) Wheat wheel type conveying mechanism
CN219168419U (en) Multifunctional reaction kettle
CN220335149U (en) High-efficient fermentation equipment
CN215086378U (en) Portable pet feed feeding device
CN211592083U (en) Oil painting pigment box for students
CN216321502U (en) Heat conduction is stirred tank for silica gel processing

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant