CN220831045U - Height-adjustable three-dimensional seedling raising device - Google Patents

Abstract

The utility model provides a height-adjustable three-dimensional seedling raising device which comprises a cultivation component and a liquid supply component, wherein the cultivation component comprises a supporting part, a cultivation part, a sealing part and a traction part, and the cultivation part is arranged in the supporting part; the cultivation part comprises a grid supporting plate, a movable supporting plate and a water collecting tank, wherein the corners of the grid supporting plate and the movable supporting plate are fixed through connecting rods, and the movable supporting plate is in sliding connection with the supporting rods; the water collecting tank is arranged between the grid supporting plate and the movable supporting plate in a sliding manner; the closed part comprises a plurality of matched clamping grooves and clamping springs, the top of the membrane cloth is pressed and fixed through the clamping springs, the lower part of the membrane cloth covers the periphery of the cultivation part and is respectively clamped and fixed with the top plate, the movable supporting plate, the bottom plate or the supporting rod through the membrane pressing clamps; the traction part comprises a fixed pulley, a traction connecting piece and a traction rope, and the fixed pulley is connected with the movable supporting plate through the traction rope. The cultivation part can freely adjust the interlayer height, so that the seedling can be cultivated and managed in a distinguishing mode, and the space utilization rate is improved.

Description

Height-adjustable three-dimensional seedling raising device

Technical Field

The utility model belongs to the technical field of facility agriculture, and particularly relates to a height-adjustable three-dimensional seedling raising device.

Background

Seedling raising is an important link in modern agricultural production and is also the most basic link in the production of planting industry. For a small number of seedlings, the treated seedlings are usually cultivated by adopting two modes of seedling cultivation boxes or seedling cultivation beds, however, when the seedlings with large quantity are cultivated or seedlings with different types and different initial cultivation times are separately cultivated and managed, the problems of the mode are that 1, the quantity of the seedlings carried by the seedling cultivation boxes is limited, when the quantity of the seedlings is increased, the quantity of the seedling cultivation boxes needs to be increased, a fresh-keeping cover is arranged on the seedling cultivation boxes, and a ventilation opening is arranged on the fresh-keeping cover, so that the operation of opening an air hole becomes troublesome, the seedling cultivation boxes need to be irrigated one by one, time and labor are consumed, and the efficiency is low. 2. Although the seedbed can bear more seedlings, the existing seedbed seedlings cannot realize differentiated culture management due to different culture time periods required by different seedlings or different initial culture times of similar seedlings. Therefore, it is very necessary to design a height-adjustable stereoscopic seedling raising device.

Disclosure of utility model

Aiming at the defects of the prior art, the utility model aims to provide the height-adjustable three-dimensional seedling raising device, and each layer of the cultivation part is an independent closed space and the interlayer height can be freely adjusted through a multi-layer three-dimensional structure and a connecting structure that the cultivation part slides up and down under the pulling of the traction part, so that the seedling distinguishing cultivation management can be realized, and the space utilization rate is improved.

The utility model is realized by the following technical scheme:

The utility model provides a three-dimensional seedling raising device of height-adjustable, it includes cultivation subassembly and feed liquid subassembly, cultivation subassembly includes supporting part, cultivation portion, airtight portion and traction portion, the supporting part includes roof, bottom plate and many spinal branchs vaulting poles, roof and bottom plate respectively with the upper and lower both ends of bracing piece are connected, just form the cavity of placing the cultivation portion between roof and the bottom plate; the cultivation parts are distributed in the cavity, each layer of cultivation part comprises a grid supporting plate, a movable supporting plate and a water collecting tank, the grid supporting plates are positioned above the movable supporting plates, the corners of the grid supporting plates and the corners of the movable supporting plates are fixed through connecting rods, and the movable supporting plates are in sliding connection with the supporting rods; the water collecting tank is arranged on the movable supporting plate in a sliding manner; the sealing part comprises clamping grooves, clamping springs, membrane cloth and membrane pressing clamps, and the clamping grooves and the clamping springs which are matched are respectively arranged on the periphery of the bottom of the top plate and the periphery of the bottom of each layer of movable supporting plate; the top of the membrane cloth is arranged in the clamping groove and is pressed and fixed through the clamp spring, and the lower part of the membrane cloth covers the periphery of the cultivation part and is respectively clamped and fixed with the top plate, the movable supporting plate, the bottom plate or the supporting rod through the membrane pressing clamp; the traction part comprises a fixed pulley, traction connecting pieces and traction ropes, wherein the fixed pulley is arranged on two sides of the supporting part, the traction connecting pieces are arranged on two ends of the movable supporting plate, and the fixed pulley is connected with the movable supporting plate through the traction ropes; the liquid supply assembly is arranged on one side of the cultivation assembly and extends into the cultivation assembly.

Preferably, the inner side of the support rod is provided with a guide groove, positioning holes are uniformly distributed in the longitudinal direction of the guide groove, the corners of the movable support plate are slidably arranged in the guide groove, and the movable support plate is fixed with the support rod at the positioning holes.

Preferably, the bottom of water catch bowl is equipped with the pulley, the up end of removal backup pad is equipped with the slide rail just the both ends of slide rail all are equipped with the locating part, the pulley slides and locates in the slide rail and fix through the locating part.

Preferably, the length and width of the grid support plate are smaller than those of the movable support plate, and the grid support plate and the movable support plate are of an integral structure and the section of the grid support plate is in a ladder shape.

Preferably, the first end of the traction rope is connected with the traction connection piece, and the second end of the traction rope extends to the outer side of the supporting part around the fixed pulley.

Preferably, the membrane cloth can be rolled up along the support rod, and the lower part of the membrane cloth is clamped and fixed by a movable support plate or a bottom plate of the lower layer adjacent to the membrane cloth through a membrane pressing clamp in a closed state; the lower part of the membrane cloth and the support rod are clamped and fixed through the membrane pressing clamp in the semi-open state; in the open state, the membrane cloth and the movable supporting plate of each layer or the top plate are clamped and fixed by the membrane pressing clamp.

Preferably, the distance between adjacent movable support plates is matched with the height of cultivated plants.

Preferably, the liquid supply assembly comprises a water supply source, a main pipeline, branch pipelines and spray heads, wherein the water supply source is connected with the first end of the main pipeline, the plurality of branch pipelines are arranged in parallel with each other, the first ends of the plurality of branch pipelines are connected with the main pipeline, the second ends of the branch pipelines extend towards the inside of the cultivation assembly and are respectively arranged on the corresponding top plate bottom surface or the movable support plate bottom surface of each layer, and the spray heads are uniformly distributed on the branch pipelines.

Preferably, the first end of the main pipeline is provided with a main pipeline switch, and the first end of the branch pipeline is provided with a branch pipeline switch.

Preferably, the bottom of the supporting part is provided with a plurality of sliding wheels.

Compared with the prior art, the utility model has the following beneficial effects:

1. The utility model has a multilayer three-dimensional structure, can bear a large number of seedlings, can improve the space utilization rate, and can realize the differentiated culture management of seedlings of different types or different initial culture times because each layer of the cultivation part is an independent closed space.

2. The cultivation parts are connected into an integral structure through the grid support plates and the movable support plates, are connected with the support rods in an up-down sliding mode, and are pulled up and down and fixed through the traction parts, so that the height between layers can be freely adjusted, and the cultivation device is suitable for cultivation requirements of seedlings with different heights.

3. The sealing part provided by the utility model is convenient for fixing the film cloth when being rolled up and down through the matching of the clamping groove, the clamping spring and the film pressing clamp, and can provide required ventilation conditions for seedlings on each layer independently.

4. The liquid supply branch pipeline extends into each layer of cultivation part, and irrigates independently according to different requirements, so that the operation is convenient and the working efficiency is improved.

Drawings

FIG. 1 is a schematic perspective view of a height-adjustable stereoscopic seedling raising device according to the utility model;

FIG. 2 is a schematic view of the structure of the support part of the present utility model;

FIG. 3 is a schematic view of a cultivation part according to the present utility model;

FIG. 4 is a schematic view of the traction portion of the present utility model;

FIG. 5 is a schematic view of the structure of the sealing part of the present utility model;

FIG. 6 is a schematic view showing the connection of the liquid supply assembly and the cultivation assembly.

The figure indicates:

The device comprises a supporting rod 1, a top plate 2, a bottom plate 3, a grid supporting plate 4, a movable supporting plate 5, a water collecting tank 6, a clamping groove 7, a clamping spring 8, a membrane cloth 9, a membrane pressing clamp 10, a water supply source 11, a main pipeline 12, a main pipeline switch 13, a branch pipeline 14, a branch pipeline switch 15, a spray head 16, a sliding wheel 17, a fixed pulley 18, a traction rope 19, a traction connecting piece 20 and a positioning hole 21.

Detailed Description

The present utility model will be described in detail with reference to the accompanying drawings.

The utility model relates to a height-adjustable three-dimensional seedling raising device, which is shown in fig. 1 to 6, and comprises a cultivation component and a liquid supply component, wherein the liquid supply component supplies water and fertilizer or nutrient solution for the cultivation component, and the cultivation component can be prefabricated according to the actual required size.

The cultivation subassembly includes supporting part, cultivation portion, airtight portion and traction portion, and supporting part is rectangular channel body structure, including four spinal branch vaulting poles 1, a roof 2 and a bottom plate 3, and roof 2 is connected with the top of bracing piece 1, and bottom plate 3 is connected with the bottom of bracing piece 1, forms the cavity of placing cultivation portion between roof 2 and the bottom plate 3.

The cultivation portion is arranged into multiple layers and distributed in the cavity of the supporting portion, and the space of each layer of cultivation portion is matched with the height of cultivated plants. Each layer of cultivation part comprises a grid supporting plate 4, a movable supporting plate 5 and a water collecting tank 6, four corners of the grid supporting plate 4 are in one-to-one correspondence with four corners of the movable supporting plate 5, and are connected into an integrated structure through connecting rods, and the grid supporting plate 4 is used for placing plants. The grid supporting plate 4 is arranged into a grid structure, which not only can play a role in supporting the plug seedlings, but also is convenient for the plug to permeate water. The movable supporting plate 5 is located below the grid supporting plate 4, and the length and the width of the movable supporting plate 5 are larger than those of the grid supporting plate 4, namely, the sections of the movable supporting plate 5 and the grid supporting plate 4 are of trapezoid structures, so that the grid supporting plate 4 can move synchronously with the movable supporting plate 5.

Four corners of the movable supporting plate 5 are slidably connected with the four supporting rods 1. In a preferred embodiment of the utility model, the grid support plate and the movable support plate are welded together to ensure that the distance between the grid support plate and the movable support plate is constant. The inner side of the support rod 1 is provided with a guide groove with an L-shaped section, four corners of the movable support plate are slidably arranged in the guide groove, positioning holes 21 are uniformly distributed in the guide groove, and the movable support plate is fixed with the support rod through screws at the corresponding positioning holes 21 according to the required height. The guide way is arranged on the inner sides of the four support rods 1 along the longitudinal direction, and the movable support plates slide up and down along the guide way to adjust the layer height of the cultivation part, so as to adapt to the cultivation requirements of seedlings with different heights.

The supporting part both sides are equipped with multiunit fixed pulley 18, and the fixed pulley is connected with the roof, and the both ends of every layer of movable support board 5 all are equipped with and draw connecting piece 20, and a set of fixed pulley corresponds the one deck movable support board, and is connected through haulage rope 19 between fixed pulley and the traction connecting piece, and the first end and the traction connecting piece 20 of haulage rope are connected, and the outside of supporting part is extended to after corresponding fixed pulley 18 is walked around to the second end of haulage rope.

The distance between the grid support plate 4 and the movable support plate 5 is greater than the height of the water collecting tank 6, and the water collecting tank 6 is arranged between the grid support plate and the movable support plate and is used for collecting liquid permeated in the plug tray. And the water collecting tank is in sliding connection with the movable supporting plate, so that the water collecting tank is convenient to put in and pull out. In the preferred embodiment of the utility model, two groups of pulleys are arranged at the bottom of the water collecting tank 6, two linear slide rails matched with the pulleys are arranged on the upper end face of the movable supporting plate 5, and limiting pieces are arranged at two ends of each linear slide rail, and the pulleys are slidably arranged on the linear slide rails and fixed through the limiting pieces, so that the water collecting tank can conveniently and freely come in and go out, and the water collecting tank can be prevented from sliding off or liquid in the water collecting tank from being spilled out when the device moves through the limiting pieces.

The airtight portion includes draw-in groove 7, jump ring 8, membrane cloth 9 and press mold clamp 10, and a plurality of supporting draw-in grooves 7 and jump ring 8 that set up are located respectively around the bottom of roof 2 and around the bottom of every layer of movable support board 5, are equipped with one set of draw-in groove and jump ring respectively on the roof and every layer of movable support board promptly, all are used for fixed membrane cloth 9. The membrane cloth 9 covers the periphery of the cultivation part, namely four sides of the supporting rod. The top of the membrane cloth 9 is arranged in the clamping groove and is clamped and fixed through the clamp spring. The film pressing clamp 10 is arranged on the supporting rod 1, and the lower part of the film cloth 9 can be respectively clamped and fixed with the supporting rod 1, the top plate 2, the movable supporting plate 5 or the bottom plate 3 through the film pressing clamp 10 to realize a closed or open state.

In the preferred embodiment of the present utility model, the lower portion of the membrane cloth 9 can be rolled up along the support bar 1. Specifically, the lower part of the membrane cloth 9 in the fully closed state is clamped and fixed with the movable support plate 5 or the bottom plate 3 of the next layer adjacent to the lower part by the membrane pressing clamp 10. The lower part of the semi-open membrane cloth 9 is rolled between the cultivation parts of the adjacent layers and is clamped and fixed with the support rod 1 through the membrane pressing clamp 10. The film cloth 9 in the completely opened state is rolled to the movable supporting plate 5 of the layer or the top plate 2 and is clamped and fixed by the film pressing clamp 10.

In the preferred embodiment of the utility model, the top plate 2, the bottom plate 3 and the movable supporting plate 5 are all solid plate structures, so that the support function can be well achieved, further, the top plate 2 and the movable supporting plate 5 are convenient for fixing the branch pipe 14, the clamp spring 8 and the clamping groove 7, the bottom plate 3 is convenient for fixing the sliding wheel 17, and the stability of the device is enhanced.

The liquid supply assembly is arranged on one side of the cultivation assembly and extends to the inside of the cultivation assembly, and is used for sprinkling irrigation of plants on each layer of cultivation part. The liquid supply assembly comprises a water supply source 11, a main pipeline 12, a main pipeline switch 13, a branch pipeline 14, a branch pipeline switch 15 and a spray head 16, wherein the water supply source is connected with the first end of the main pipeline, and the main pipeline switch is arranged at the first end of the main pipeline and used for switching on or off the water supply source.

The plurality of branch pipelines 14 are mutually parallel, the first end of branch pipeline is all connected with trunk line 12, and branch pipeline switch 15 locates the first end of branch pipeline, opens or closes the branch pipeline according to the water supply demand of the different plants of every layer cultivation portion, realizes that multiple plant goes on simultaneously on same seedling raising device. Specifically, the second end of one branch pipe positioned at the topmost layer extends along the bottom surface of the top plate to the interior of the cultivation component and is connected with the bottom surface of the top plate 2, and the other branch pipes respectively extend along the bottom surface of the corresponding movable supporting plate 5 on each cultivation part to the interior of the cultivation component and are connected with the bottom surface of the corresponding movable supporting plate. The second ends of the plurality of branch pipes are all arranged inside the cultivation component or flush with the outer side edges of the top plate 2 and the movable supporting plate 5 so as not to obstruct the flatness of the membrane cloth. The spray heads 16 are uniformly distributed on the branch pipelines and used for sprinkling irrigation to plants at the lower layer of the branch pipelines, and the number of the spray heads 16 is set according to requirements.

The main pipeline switch 13 and the branch pipeline switch 15 are preferably ball valve switches, so that the sealing performance is good and the operation is convenient.

The bottom of the supporting part is also provided with a plurality of sliding wheels 17, the sliding wheels are uniformly distributed around the bottom plate 3, and the sliding wheels 17 are preferably universal sliding wheels and are used for moving the whole device.

The following describes the embodiments of the present utility model further:

The plug seedlings are prefabricated and installed according to the actual needed size, and are placed on the grid support plates 4 of each layer. The multi-layer three-dimensional structure can bear a large number of seedlings and improve the space utilization rate. Moreover, each layer of seedlings is independent, and the seedlings of different types or different initial culture times can be subjected to differentiated culture management.

At the initial stage of cultivation, the plug seedlings need to be completely shielded and need to be in a fully-closed state, at this time, the lower part of the membrane cloth 9 and the membrane pressing clamp 10 are positioned at the bottom end of each layer of cultivation part, namely, the membrane pressing clamp at the lowest layer is positioned on the bottom plate 3, and the lower part of the membrane cloth is clamped and fixed with the bottom plate through the membrane pressing clamp. The film pressing clamps of the rest layers are positioned on the movable supporting plate 5 of each layer, and the lower part of the film cloth is clamped and fixed with the movable supporting plate 5 through the film pressing clamps.

In the cultivation process, according to the cultivation time of the nursery stock, the film cloth needs to be slowly rolled up from bottom to top every few days, at this time, the lower part of the uppermost film cloth 9 and the film pressing clamp 10 are positioned on the supporting rod 1 between the top plate 2 and the first layer movable supporting plate 5, the lower part of the film cloth of the middle layer and the film pressing clamp are positioned on the supporting rod between the cultivation parts of each layer, the lower part of the film cloth of the lowermost layer and the film pressing clamp are positioned on the supporting rod between the bottom plate 3 and the movable supporting plate of the adjacent layer, and at this time, the lower part of the film cloth is clamped and fixed with the supporting rod through the film pressing clamps.

In the later period of cultivation, the plug seedlings need to be completely opened, the film cloth is rolled to the uppermost part of each layer of cultivation part, at the moment, the film cloth 9 and the film pressing clamp 10 at the uppermost layer are positioned on the top plate 2, and the film cloth is clamped and fixed with the top plate through the film pressing clamp. The membrane cloth and the membrane pressing clamp of each layer are positioned on the movable supporting plate 5 of each layer, and the membrane cloth is clamped and fixed with the movable supporting plate through the membrane pressing clamp. At this time, each layer of plug seedlings is in a completely opened state.

During the cultivation period, the main pipeline switch 13 and the branch pipeline switch 15 are started, liquid such as water, liquid fertilizer or nutrient solution which needs to be injected into the plug seedling is shunted into the branch pipeline 14 through the main pipeline 12, then is sprayed onto the plug seedling through the spray heads 16 arranged on the branch pipeline, the plug seedling absorbs the liquid for growth and utilization, the liquid permeated from the plug flows into the water collecting tank 6 through the grid supporting plate 4, the water collecting tank 6 is regularly pumped out from the movable supporting plate 5, and redundant water is poured out. The utility model sets the sprinkling irrigation facilities and the sealing measures, and can realize the cultivation and management of batch seedlings by opening the sealing part and the irrigation device once, thereby saving time and labor. Can open ventilation and irrigate the seedling in batches, labour saving and time saving.

According to the utility model, the fixed pulleys 18 are arranged to be connected with the movable supporting plates 5 of the corresponding layers through the traction ropes 19, and the traction ropes are pulled or loosened, so that the movable supporting plates can slide up and down along the guide grooves in the supporting rods and are fixed at the positioning holes 21 through screws, and the distance between the movable supporting plates of each layer is freely adjusted, so that the seedling cultivation requirements of different heights are met.

In addition, the utility model can be provided with a plurality of layers of cultivation parts according to the needs, and the end cultivation time is different because of different kinds of plug seedlings or seedlings of the same kind but different initial cultivation time, so the device can respectively place the plug seedlings of the different kinds or the plug seedlings of the same kind but different initial cultivation time on the grid support plates 4 of different layers, and can independently control the closing and rolling time of the plug seedlings on each layer of cultivation part through the film cloth 9 and the film pressing clamp 10 which are independently arranged on each layer of cultivation part. During cultivation, the sprinkling irrigation of plug seedlings on each layer of cultivation part can be independently controlled according to the branch pipeline switch 15 on each layer of cultivation part. The device can also move the whole device to a designated position by a sliding wheel 17 according to the requirement.

The above examples are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solution of the present utility model should fall within the scope of protection defined by the claims of the present utility model without departing from the spirit of the present utility model.

Claims (10)

1. The height-adjustable three-dimensional seedling raising device is characterized by comprising a cultivation component and a liquid supply component,

The cultivation component comprises a supporting part, a cultivation part, a sealing part and a traction part, wherein the supporting part comprises a top plate, a bottom plate and a plurality of supporting rods, the top plate and the bottom plate are respectively connected with the upper end and the lower end of the supporting rods, and a cavity for placing the cultivation part is formed between the top plate and the bottom plate;

The cultivation parts are distributed in the cavity, each layer of cultivation part comprises a grid supporting plate, a movable supporting plate and a water collecting tank, the grid supporting plates are positioned above the movable supporting plates, the corners of the grid supporting plates and the corners of the movable supporting plates are fixed through connecting rods, and the movable supporting plates are in sliding connection with the supporting rods; the water collecting tank is arranged on the movable supporting plate in a sliding manner;

The sealing part comprises clamping grooves, clamping springs, membrane cloth and membrane pressing clamps, and the clamping grooves and the clamping springs which are matched are respectively arranged on the periphery of the bottom of the top plate and the periphery of the bottom of each layer of movable supporting plate; the top of the membrane cloth is arranged in the clamping groove and is pressed and fixed through the clamp spring, and the lower part of the membrane cloth covers the periphery of the cultivation part and is respectively clamped and fixed with the top plate, the movable supporting plate, the bottom plate or the supporting rod through the membrane pressing clamp;

The traction part comprises a fixed pulley, traction connecting pieces and traction ropes, wherein the fixed pulley is arranged on two sides of the supporting part, the traction connecting pieces are arranged on two ends of the movable supporting plate, and the fixed pulley is connected with the movable supporting plate through the traction ropes;

The utility model discloses a cultivation device, including cultivation subassembly, liquid supply subassembly, the cultivation subassembly is located to the liquid supply subassembly, the liquid supply subassembly includes trunk line and lateral conduit, the first end and the water supply source of trunk line are connected, and the first end of many lateral conduit mutual parallel arrangement and lateral conduit all is connected with the trunk line, and the second end of lateral conduit all extends and locates respectively on the removal backup pad bottom surface of corresponding roof bottom surface or every layer to cultivation subassembly inside.

2. The height-adjustable three-dimensional seedling raising device according to claim 1, wherein guide grooves are formed in the inner sides of the support rods, positioning holes are uniformly distributed in the longitudinal direction of the guide grooves, corners of the movable support plates are slidably arranged in the guide grooves, and the movable support plates are fixed with the support rods at the positioning holes.

3. The height-adjustable three-dimensional seedling raising device according to claim 1, wherein a pulley is arranged at the bottom of the water collecting tank, a slide rail is arranged on the upper end face of the movable supporting plate, limiting pieces are arranged at two ends of the slide rail, and the pulley is slidably arranged in the slide rail and is fixed through the limiting pieces.

4. The height-adjustable stereoscopic seedling raising device according to claim 1, wherein the length and width of the grid support plate are smaller than those of the movable support plate, and the grid support plate and the movable support plate are of an integral structure and have a trapezoid cross section.

5. The height-adjustable stereoscopic seedling raising device according to claim 1, wherein a first end of the traction rope is connected with the traction connection member, and a second end of the traction rope extends to the outside of the support portion around the fixed pulley.

6. The height-adjustable stereoscopic seedling raising device according to claim 1, wherein the membrane cloth can be rolled up along the support rod, and the lower part of the membrane cloth is clamped and fixed by a movable support plate or a bottom plate of a lower layer adjacent to the membrane cloth in a closed state through a membrane pressing clamp; the lower part of the membrane cloth and the support rod are clamped and fixed through the membrane pressing clamp in the semi-open state; in the open state, the membrane cloth and the movable supporting plate of each layer or the top plate are clamped and fixed by the membrane pressing clamp.

7. The height-adjustable stereoscopic seedling raising device according to claim 1, wherein the distance between adjacent movable support plates is set to match the height of cultivated plants.

8. The height-adjustable stereoscopic seedling raising device according to claim 1, wherein the liquid supply assembly further comprises spray heads, and the spray heads are uniformly distributed on the branch pipelines.

9. The height-adjustable stereoscopic seedling raising device according to claim 8, wherein the first end of the main pipeline is provided with a main pipeline switch, and the first end of the branch pipeline is provided with a branch pipeline switch.

10. The height-adjustable stereoscopic seedling raising device according to claim 1, wherein a plurality of sliding wheels are provided at the bottom of the supporting part.