CN215011951U

CN215011951U - Gardens nursery stock culture frame

Info

Publication number: CN215011951U
Application number: CN202021221889.3U
Authority: CN
Inventors: 陈超; 秦国梁
Original assignee: Jiangsu Kaijin Ecological Environment Co ltd; Nanjing Gianda Road & Bridge Construction Co ltd; Jiangsu Jiuzhi Environmental Technology Service Co ltd
Current assignee: Jiangsu Kaijin Ecological Environment Co ltd; Nanjing Gianda Road & Bridge Construction Co ltd; Jiangsu Jiuzhi Environmental Technology Service Co ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-12-07
Anticipated expiration: 2030-06-28

Abstract

The utility model relates to a garden nursery stock cultivating frame, which is applied to the technical field of garden seedling cultivation and solves the problem that the position of a cultivating groove can not be adjusted, and comprises an upper frame body, a lower frame body and two pairs of supporting rods arranged between the upper frame body and the lower frame body, wherein the two pairs of supporting rods are arranged along the length direction of the lower frame body, a placing plate is arranged between the two pairs of supporting rods, and the cultivating groove is arranged on the placing plate; the supporting rod is sleeved with a limiting cylinder, the limiting cylinder is fixedly connected to the object placing plate, the supporting rod is provided with a plurality of limiting grooves along the length direction, and limiting rods matched with the limiting grooves are inserted into the limiting cylinder. The utility model discloses a stop lever is fixed a position putting thing board and culture tank, and the operator of being convenient for adjusts the distance between two adjacent culture tanks to cultivate the seedling to co-altitude not.

Description

Gardens nursery stock culture frame

Technical Field

The utility model belongs to the technical field of the cultivation technique of growing seedlings in gardens and specifically relates to a gardens nursery stock culture frame is related to.

Background

With the development of society, the increase of urban population causes the increasing tension of land resources. How to better utilize the limited land is examined every city decision maker. Therefore, the usable land of the nursery stock cultivation bases of the flower and tree farms around the city and the scientific research institutions is gradually reduced, and the device capable of three-dimensionally cultivating nursery stocks is produced.

Chinese patent with publication number CN206698898U discloses a movable seed cultivation rack, including cultivation fluorescent tube illumination board, locking bolt, cultivation rack locking board, cultivation rack angle folding board, cultivation rack side shield, cultivation rack cross beam layer board, control circuit board, temperature display screen, starting switch, cultivation rack stabilizer blade, stabilizer blade directive wheel, cultivation fluorescent tube illumination board is installed in cultivation rack cross beam layer board below, cultivation rack angle folding board is connected with cultivation rack side shield, cultivation rack locking board passes through locking bolt swing joint with cultivation rack side shield, control circuit board is installed in cultivation rack locking board the place ahead, starting switch is connected through control circuit board with temperature display screen, be equipped with the cultivation rack stabilizer blade between stabilizer blade directive wheel and the cultivation rack locking board, cultivation rack stabilizer blade and stabilizer blade directive wheel swing joint.

The above prior art solutions have the following drawbacks: culture rack crossbeam layer board fixed connection is on culture rack side shield, and the operator can't adjust the height of culture rack crossbeam layer board, and the operator of being not convenient for cultivates the quick cultivation seedling of co-altitude or altitude variation.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, one of the purposes of the utility model is to provide a gardens nursery stock culture rack, its effect that has is: fix a position through the gag lever post to putting thing board and culture tank, the operator of being convenient for is adjusted the distance between two adjacent culture tanks to cultivate the seedling to co-altitude not.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a garden nursery stock cultivation frame comprises an upper frame body, a lower frame body and support rods arranged between the upper frame body and the lower frame body, wherein two pairs of support rods are arranged along the length direction of the lower frame body, an object placing plate is arranged between the two pairs of support rods, and a cultivation groove is arranged on the object placing plate; the supporting rod is sleeved with a limiting cylinder, the limiting cylinder is fixedly connected to the object placing plate, the supporting rod is provided with a plurality of limiting grooves along the length direction, and limiting rods matched with the limiting grooves are inserted into the limiting cylinder.

Through adopting above-mentioned technical scheme, when the operator cultivates higher when cultivateing seedlings, the operator promotes to put the thing board and removes along the length direction of bracing piece, and put the thing board and move together and remove a spacing section of thick bamboo, the operator will put the thing board and adjust to suitable position after, the operator passes the gag lever post from a spacing section of thick bamboo, make the gag lever post peg graft in the spacing groove, the spacing groove restricts the gag lever post this moment, thereby the gag lever post has played the effect of location to putting the thing board and having cultivateed the groove, and then be convenient for the operator to adjust the distance between two adjacent cultivation grooves, so that cultivate the seedling to co-altitude.

The present invention may be further configured in a preferred embodiment as: the side wall of the limiting barrel, which is far away from the supporting rod, is provided with a v-shaped frame, the two opposite side walls of the v-shaped frame are fixedly connected to the limiting barrel, and the limiting rod penetrates through the side wall of the v-shaped frame, which is far away from the limiting barrel; the limiting rod is fixedly connected with a stop block between the limiting barrel and the v-21274-shaped frame, a spring is sleeved between the stop block and the v-21274-shaped frame, and when the limiting rod is inserted into the limiting groove, the spring is in a partial compression state.

Through adopting above-mentioned technical scheme, when the gag lever post is pegged graft in the spacing groove, the dog compresses the spring, and the spring has elastic restoring force by compression to the spring promotes the dog and is close to spacing section of thick bamboo under the effect of elastic restoring force, makes the dog drive the gag lever post and supports tightly in the spacing groove, and then reduces the condition emergence that the gag lever post breaks away from the spacing groove, in order to reduce the possibility that gliding appears in spacing section of thick bamboo.

The present invention may be further configured in a preferred embodiment as: two pairs of positioning tubes are arranged on one side of the lower frame body facing the upper frame body along the length direction, the supporting rods are connected in the positioning tubes in a sliding mode, and the positioning tubes penetrate through the limiting cylinders and the supporting rods; the lead screw is connected with and bracing piece threaded connection lead screw down in the framework, the lead screw sets up along the length direction of registration arm, the lead screw extends to one side that the framework deviates from the bracing piece down, the lateral wall of registration arm has seted up the spacing hole of a plurality of along length direction, spacing hole and spacing groove are located the homonymy.

Through adopting above-mentioned technical scheme, the operator rotates the lead screw, the length direction of lead screw drive bracing piece along the registration arm removes, make the bracing piece drive the framework and remove to the one side of keeping away from lower framework, go up the framework at this moment and increase with the distance between the framework down, thereby increased the control range who puts the thing board, and then be convenient for the operator to further adjust the distance between two adjacent culture tanks, the application scope who cultivates the frame has been enlarged, and the operator can be pegged graft the gag lever post in the spacing hole, in order to realize the purpose to putting the thing board location.

The present invention may be further configured in a preferred embodiment as: the side wall of the supporting rod is embedded with balls which are abutted to the inner wall of the positioning pipe, and the balls are uniformly distributed along the length direction of the supporting rod.

Through adopting above-mentioned technical scheme, when the bracing piece removed along the length direction of registration arm, the bracing piece drove the ball and produces the friction in the inner wall of registration arm for ball self produces the roll, and the ball converts the friction between bracing piece and the registration arm into rolling friction this moment, thereby the ball has reduced the frictional force between bracing piece and the registration arm, and then the quick convenient height of adjusting the bracing piece of the operator of being convenient for.

The present invention may be further configured in a preferred embodiment as: the upper frame body and the lower frame body are respectively provided with extending edges extending outwards, a heat-insulating cover is arranged between the two extending edges, the heat-insulating cover is fixedly connected to the extending edges of the upper frame body, and the heat-insulating cover is foldable.

Through adopting above-mentioned technical scheme, after the operator will cultivate to plant the culture tank, the operator can cover cultivation seedling through the cover that keeps warm for keep warm cover and last framework and form inclosed space down between the framework, thereby keep warm the cover and played heat retaining effect to the cultivation district of cultivating the seedling, and then the operator of being convenient for adjusts the temperature of cultivating the seedling cultivation district, with the survival rate of improving the cultivation seedling.

The present invention may be further configured in a preferred embodiment as: a counterweight frame is arranged on one side of the heat-insulating cover away from the upper frame, and a hook for fixing the counterweight frame is hinged on the extending edge of the upper frame body; when the heat preservation cover is in a folded state, the counterweight frame is fixed by the hook.

Through adopting above-mentioned technical scheme, the counter weight frame can increase the gravity that keeps warm and covers self, when the operator expandes to keep warm and cover, the counter weight frame can drive to keep warm and cover and support tightly on the edge that extends of framework down, thereby the counter weight frame is convenient for the abundant expansion of operator keeps warm and covers, and then increase the leakproofness that keeps warm between cover and the lower framework, with the heat preservation effect that promotes to keep warm and cover, and the operator is when accomodating the heat preservation cover, the operator can fold the heat preservation cover, then fix the counter weight frame through the couple, thereby be convenient for the operator to accomodate the heat preservation cover, with reduce the long-term emergence impaired possibility of heat preservation cover.

The present invention may be further configured in a preferred embodiment as: one side of the culture tank facing the object placing plate is provided with two pairs of idler wheels, and the two pairs of idler wheels are symmetrically arranged along the center line of the culture tank.

Through adopting above-mentioned technical scheme, the operator is when taking out the culture tank, and the operator can promote the culture tank and slide on putting the thing board for the culture tank drives the gyro wheel and rolls on putting the thing board, and the gyro wheel converts the culture tank and the friction of putting between the thing board into rolling friction this moment, thereby the gyro wheel has reduced the culture tank and has put the frictional force between the thing board, and then the quick convenient removal culture tank of operator of being convenient for, so that the operator will cultivate the seedling and take out.

The present invention may be further configured in a preferred embodiment as: two pairs of grooves are formed in one side, facing the culture tank, of the object placing plate and correspond to the two pairs of rollers respectively; when the culture tank is placed on the object placing plate, the roller is embedded in the groove.

Through adopting above-mentioned technical scheme, when the operator will cultivate the groove and place on putting the thing board, the gyro wheel inlays and establishes the recess, and the recess restricts the moving direction of gyro wheel this moment to increase the stability of cultivation groove, and then reduce the cultivation groove and take place from the condition of putting the thing board landing.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the object placing plate and the culture tanks are positioned through the limiting rods, so that an operator can conveniently adjust the distance between two adjacent culture tanks, and cultured seedlings with different heights can be conveniently cultured;

2. an operator adjusts the distance between the upper frame body and the lower frame body through the screw rod, so that the adjusting range of the object placing plate is increased, the operator can further adjust the distance between two adjacent culture tanks, and the application range of the culture rack is expanded;

3. the culture area for cultivating the seedlings is insulated through the insulation cover, so that the temperature of the culture area for cultivating the seedlings can be conveniently adjusted by an operator, and the survival rate of the cultivated seedlings is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment.

Fig. 2 is a schematic structural diagram for embodying the lead screw in the present embodiment.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Fig. 4 is an enlarged schematic view of a portion B in fig. 1.

In the figure, 1, an upper frame; 11. edge extension; 12. a heat-preserving cover; 13. a counterweight frame; 14. hooking; 2. a lower frame body; 21. a caster wheel; 3. a support bar; 31. a limiting groove; 32. a ball bearing; 4. a storage plate; 41. a limiting cylinder; 42. \ 21274and a shape frame; 43. a limiting rod; 44. a stopper; 45. a spring; 5. a culture tank; 51. a roller; 52. a groove; 6. a positioning tube; 61. a screw rod; 62. and a limiting hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a gardens nursery stock culture rack, including last framework 1 and lower framework 2 that the size is the same, and lower framework 2 and last framework 1 are the quadrangle. A positioning pipe 6 and a supporting rod 3 are arranged between the upper frame body 1 and the lower frame body 2, the supporting rod 3 is connected in the positioning pipe 6 in a sliding mode, the positioning pipe 6 is fixedly connected to the lower frame body 2, and the supporting rod 3 is fixedly connected to the upper frame body 1. The length direction of registration arm 6 edge lower frame body 2 is equipped with two pairs, and four registration arms 6 set up four corners at lower frame body 2 respectively to bracing piece 3 is the same with registration arm 6's quantity, and four bracing pieces 3 fixed connection are at four corners of last frame body 1. Meanwhile, one side of the lower frame body 2, which is far away from the positioning tube 6, is provided with four casters 21, so that an operator can move the lower frame body 2 conveniently.

Referring to fig. 1 and 2, the positioning tube 6 is rotatably provided with a screw rod 61 in threaded connection with the support rod 3 in the vertical direction, the screw rod 61 is rotatably connected to the lower frame 2, and the screw rod 61 penetrates through the lower frame 2 and extends to one side of the lower frame 2 away from the positioning tube 6, so that an operator can rotate the screw rod 61. An operator rotates the four screw rods 61 simultaneously, the screw rods 61 drive the support rod 3 to move along the length direction of the positioning tube 6, so that the support rod 3 drives the upper frame body 1 to move towards one side away from the lower frame body 2, the screw rods 61 play a role in adjusting the distance between the upper frame body 1 and the lower frame body 2, and the operator can adjust the height of the upper frame body 1 conveniently.

Referring to fig. 2 and 3, the side walls of two support rods 3 inserted into the same pair of positioning tubes 6 and deviating from each other, and two adjacent side walls are embedded with a set of balls 32, the same set of balls 32 is provided with a plurality of balls along the length direction of the support rods 3, the plurality of balls 32 are all connected to the support rods 3 in a rolling manner, and the balls 32 are in contact with the inner walls of the positioning tubes 6. When the support rod 3 slides along the positioning tube 6, the support rod 3 drives the balls 32 to rub against the inner wall of the positioning tube 6. At this moment, the ball 32 rolls, so that the ball 32 can convert the friction between the support rod 3 and the positioning tube 6 into rolling friction, and further reduce the friction between the support rod 3 and the positioning tube 6, so that an operator can drive the support rod 3 to move, and the labor force of the operator is saved.

Referring to fig. 2 and 3, be equipped with between two pairs of registration arms 6 and put thing board 4, put thing board 4 and be equipped with the culture tank 5 that is used for planting the cultivation seedling in the one side that deviates from lower framework 2, and put thing board 4 and be equipped with a plurality of along registration arm 6's vertical direction. Each storage plate 4 is provided with four limiting cylinders 41, the four limiting cylinders 41 are respectively sleeved on the four positioning tubes 6, and the limiting cylinders 41 are slidably connected to the positioning tubes 6. A set of spacing hole 62 has all been seted up on the relative lateral wall of same two registration arms 6, and same group's spacing hole 62 has a plurality of along the vertical direction evenly distributed of registration arm 6. And a set of limiting grooves 31 are formed in the opposite side walls of the two support rods 3 inserted into the same pair of positioning tubes 6, a plurality of limiting holes 62 are formed in the same set of limiting grooves 31 along the length direction of the support rods 3, and the diameters of the limiting holes 62 and the limiting grooves 31 are the same.

Referring to fig. 2 and 3, a v-21274is arranged on the opposite side walls of the two limiting cylinders 41 sleeved on the same pair of positioning tubes 6, the two opposite side walls of the v-shaped frame 42 are fixedly connected to the limiting cylinders 41, the v-21274is arranged on the side wall of the v-shaped frame 42 far away from the limiting cylinders 41, limiting rods 43 simultaneously penetrating through the limiting cylinders 41 penetrate through the side walls of the limiting cylinders 41, the diameters of the limiting rods 43 and the limiting holes 62 are the same, and in a normal state, the limiting rods 43 are inserted in the limiting holes 62 or the limiting grooves 31. The limiting rod 43 is fixedly connected with a stop block 44 between the limiting cylinder 41 and the v-21274, the shaped frame 42 is fixedly connected with a spring 45 between the stop block 44 and the v-21274, the spring 45 is sleeved on the limiting rod 43, and two ends of the spring 45 are respectively fixedly connected with the stop block 44 and the v-21274, and the shaped frame 42.

Referring to fig. 2 and 3, when an operator plants a higher seedling, the operator needs to adjust the distance between two adjacent storage plates 4. An operator firstly pulls the limiting rod 43 to be separated from the limiting hole 62 or the limiting groove 31, at the moment, the limiting rod 43 drives the stop block 44 to move towards one side far away from the limiting cylinder 41, so that the stop block 44 compresses the spring 45, and the spring 45 has elastic restoring force after being compressed. Then the operator pushes the object placing plate 4 to move along the vertical direction of the positioning tube 6 and the supporting rod 3 until the object placing plate 4 moves to a proper position, and then the operator loosens the limiting rod 43. Spring 45 is under the effect of elastic recovery power this moment, spring 45 promotes dog 44 and is close to spacing section of thick bamboo 41, dog 44 drives gag lever post 43 and pegs graft in spacing hole 62 or spacing groove 31, spacing groove 31 or spacing hole 62 carry on spacingly to bracing piece 3, make gag lever post 43 fix a position spacing section of thick bamboo 41, thereby spacing section of thick bamboo 41 has played the effect of location to putting thing board 4, and then the operator of being convenient for adjusts the distance between two adjacent culture tanks 5, so that the inslot person cultivates the seedling of co-altitude.

Referring to fig. 2 and 4, four rollers 51 are disposed on one side of the cultivation tank 5 facing the object placing plate 4, the four rollers 51 are disposed on four corners of the cultivation tank 5, and four grooves 52 are disposed on the object placing plate 4 corresponding to the rollers 51. When the operator places culture tank 5 on putting thing board 4, gyro wheel 51 inlays and establishes in recess 52, and recess 52 carries on spacingly to gyro wheel 51 to increase culture tank 5's stability, and then reduce the condition emergence of culture tank 5 landing from putting thing board 4. When the operator need take out culture tank 5, operator pulling culture tank 5, gyro wheel 51 breaks away from recess 52 this moment to drive culture tank 5 and slide on putting thing board 4, thereby gyro wheel 51 can be with culture tank 5 and put the friction conversion between the thing board 4 and rolling friction, and then the quick convenient pulling culture tank 5 of operator of being convenient for, so that the operator will cultivate the seedling and take out.

Referring to fig. 2, each of the upper frame 1 and the lower frame 2 has an extended edge 11 extending outward, and the extended edge 11 is disposed in a ring shape along a circumferential direction of the upper frame 1 or the lower frame 2. A foldable heat preservation cover 12 is arranged between the two extending edges 11, one end of the heat preservation cover 12 in the vertical direction is fixedly connected to the extending edge 11 of the upper frame body 1, and the other end of the heat preservation cover is fixedly connected to a counterweight frame 13. After the operator places the cultivated seedlings on the object placing plate 4, the operator unfolds the heat preservation cover 12 from top to bottom. At this time, the weight frame 13 can increase the gravity of the lower part of the heat preservation cover 12 and drive the heat preservation cover 12 to be fully unfolded. Simultaneously keep warm and cover 12 and the extension 11 of framework 2 is laminated mutually for form inclosed space between cover 12 and last framework 1 and the framework 2 down, thereby cover 12 has played heat retaining effect to the cultivation district of cultivating the seedling that keeps warm, makes whole cultivation frame form little greenhouse, with the survival rate of promoting the cultivation seedling.

Referring to fig. 2, a hook 14 for fixing the counterweight frame 13 is hinged on the extending edge 11 of the upper frame body 1, and when the heat preservation cover 12 is not used, an operator can push the counterweight frame 13 to approach the upper frame body 1, so as to achieve the effect of folding the heat preservation cover 12. At this time, the operator can hang the hook 14 on the counterweight frame 13 to position the counterweight frame 13, so that the operator can store the heat-insulating cover 12 conveniently.

The implementation principle of the embodiment is as follows: the operator removes suitable position with the culture rack earlier, and the operator rotates lead screw 61 afterwards, and lead screw 61 drive bracing piece 3 slides in registration arm 6, and bracing piece 3 drives upper frame 1 and moves to the one side of keeping away from lower frame 2. After the operator will go up framework 1 and remove to suitable position, the operator adjusts the position of culture tank 5 according to the height of the seedling of cultivating that waits to cultivate again, and the operator promotes to put thing board 4 and removes along the vertical direction of registration arm 6 and bracing piece 3. After the object placing plate 4 moves to a proper distance, the operator fixes the object placing plate 4 by the limiting rod 43 and the limiting cylinder 41. Then the operator puts the culture tank 5 with the cultured seedlings on the object placing plate 4, and simultaneously the operator opens the heat preservation cover 12 to realize the purpose of culturing the cultured seedlings.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a gardens nursery stock artificial containers, includes framework (1) and lower framework (2) and sets up bracing piece (3) between framework (1) and lower framework (2) last, the length direction of framework (2) is equipped with two pairs, its characterized in that down in bracing piece (3): an object placing plate (4) is arranged between the two pairs of supporting rods (3), and a culture tank (5) is arranged on the object placing plate (4);

the supporting rod (3) is sleeved with a limiting cylinder (41), the limiting cylinder (41) is fixedly connected to the object placing plate (4), the supporting rod (3) is provided with a plurality of limiting grooves (31) along the length direction, and limiting rods (43) matched with the limiting grooves (31) are inserted into the limiting cylinder (41).

2. The garden nursery stock culture rack of claim 1, wherein: the side wall of the limiting barrel (41) departing from the supporting rod (3) is provided with a v-shaped frame (42), the two opposite side walls of the v-shaped frame (42) are fixedly connected to the limiting barrel (41), and the limiting rod (43) penetrates through the side wall of the v-shaped frame (42) far away from the limiting barrel (41);

the limiting rod (43) is fixedly connected with a stop block (44) between a limiting barrel (41) and a v-21274, the limiting rod (43) is sleeved with a spring (45) between the stop block (44) and the v-21274, the shaped frame (42), and when the limiting rod (43) is inserted into the limiting groove (31), the spring (45) is in a partial compression state.

3. The garden nursery stock culture rack of claim 1, wherein: two pairs of positioning tubes (6) are arranged on one side, facing the upper frame body (1), of the lower frame body (2) along the length direction, the supporting rods (3) are connected in the positioning tubes (6) in a sliding mode, and the positioning tubes (6) penetrate through the limiting cylinders (41) and the supporting rods (3);

the utility model discloses a spacing structure of a motor vehicle, including framework (2) down, it is connected with and bracing piece (3) threaded connection lead screw (61) to rotate on the framework (2) down, the length direction setting of registration arm (6) is followed in lead screw (61), lead screw (61) extend to one side that framework (2) deviate from bracing piece (3) down, a plurality of spacing hole (62) have been seted up along length direction to the lateral wall of registration arm (6), spacing hole (62) are located the homonymy with spacing groove (31).

4. The garden nursery stock culture rack of claim 3, wherein: the side wall of the supporting rod (3) is embedded with balls (32) which are inconsistent with the inner wall of the positioning tube (6), and the balls (32) are uniformly distributed with a plurality of balls along the length direction of the supporting rod (3).

5. The garden nursery stock culture rack of claim 1, wherein: the upper frame body (1) and the lower frame body (2) both extend outwards to form extending edges (11), a heat-insulating cover (12) is arranged between the extending edges (11), the heat-insulating cover (12) is fixedly connected to the extending edges (11) of the upper frame body (1), and the heat-insulating cover (12) is foldable.

6. The garden nursery stock culture rack of claim 5, wherein: a counterweight frame (13) is arranged on one side, away from the upper frame, of the heat-insulating cover (12), and a hook (14) for fixing the counterweight frame (13) is hinged to the extending edge (11) of the upper frame body (1);

when the heat preservation cover (12) is in a folded state, the hook (14) fixes the counterweight frame (13).

7. The garden nursery stock culture rack of claim 1, wherein: one side of the culture tank (5) facing the object placing plate (4) is provided with two pairs of rollers (51), and the two pairs of rollers (51) are symmetrically arranged along the central line of the culture tank (5).

8. The garden nursery stock culture rack of claim 7, wherein: one side of the object placing plate (4) facing the culture tank (5) is provided with two pairs of grooves (52), and the two pairs of grooves (52) respectively correspond to the two pairs of rollers (51);

when the culture tank (5) is placed on the object placing plate (4), the roller (51) is embedded in the groove (52).