WO2018040516A1 - 一种紧带器 - Google Patents

一种紧带器 Download PDF

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Publication number
WO2018040516A1
WO2018040516A1 PCT/CN2017/074084 CN2017074084W WO2018040516A1 WO 2018040516 A1 WO2018040516 A1 WO 2018040516A1 CN 2017074084 W CN2017074084 W CN 2017074084W WO 2018040516 A1 WO2018040516 A1 WO 2018040516A1
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WO
WIPO (PCT)
Prior art keywords
reel
ratchet
hole
plate
bayonet
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PCT/CN2017/074084
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English (en)
French (fr)
Inventor
肖招银
Original Assignee
浙江双友物流器械股份有限公司
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Publication of WO2018040516A1 publication Critical patent/WO2018040516A1/zh

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/22—Shades or blinds for greenhouses, or the like
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G11/00—Means for fastening cables or ropes to one another or to other objects; Caps or sleeves for fixing on cables or ropes
    • F16G11/12—Connections or attachments, e.g. turnbuckles, adapted for straining of cables, ropes, or wire
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
    • A01G9/22—Shades or blinds for greenhouses, or the like
    • A01G9/222—Lamellar or like blinds
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/25—Greenhouse technology, e.g. cooling systems therefor

Definitions

  • the invention belongs to the technical field of machinery and relates to a belt tightener.
  • the greenhouse is a frame-film structure with excellent thermal insulation properties. It is an important facility in modern agricultural production and has been widely used in agricultural production in most parts of China.
  • Plastic film is a commonly used material in agricultural greenhouses. However, due to the soft material of plastic film, the size of the greenhouse film is large when used in greenhouses. Therefore, the existing greenhouse film is mostly supported by a rigid skeleton. In order to position the plastic film on the skeleton, the rope is generally tightened for fixing.
  • a ratchet type wire tightener including a frame, a ratchet assembly and a check buckle, the ratchet assembly and the check buckle mounting on the frame, wherein the frame includes, as disclosed in Chinese Patent Application No.
  • the ratchet assembly includes a mounting shaft and a ratchet wheel at two ends of the mounting shaft, and the mounting shaft is provided with a plurality of threading wires a hole, the two side plates are correspondingly provided with a ratchet mounting hole, and the ratchet assembly is rotatably disposed between the two side plates through the mounting shaft and the ratchet mounting hole, and the two side plates are A card hole for locking the reverse button is also provided.
  • a ratchet type wire tightener as disclosed in U.S. Patent Application Publication No. US 2002/0063247 A1.
  • the above-mentioned tightener can keep the rope in tension, it still has the following defects: 1.
  • the above-mentioned ratchet type tightener rotates the ratchet to tighten the drawstring on the mounting shaft, and all of them are assembled by the anti-reverse
  • the buckle is used to prevent the wire rope from loosening again, and the reverse buckle is formed by bending the steel wire. The strength is poor, and the deformation is invalid after a long time.
  • the ratchet is stuck on the anti-reverse buckle, and the rope is loosened, resulting in looseness.
  • the object of the present invention is to solve the above problems in the prior art, and proposes a tightening device.
  • the technical problem to be solved by the present invention is how to improve the tensioning effect of the laminating tape and the stability after tensioning.
  • a belt tightener comprising a bracket and a reel having two opposite side plates, both of which are provided with shaft holes, both ends of the reel
  • Each has a ratchet portion, wherein the ratchet portion is located in the corresponding shaft hole and can rotate along the reel in the shaft hole, and the upper inner wall of the shaft hole is provided with a concave bayonet,
  • the ratchet portion can be eccentrically moved by an external force to cause one of the ratchets to be caught in the bayonet.
  • the tensioning device is mainly used on a greenhouse. When in use, the tensioning device is connected to the skeleton on one side of the greenhouse, one end of the laminating tape is fixed on the reel, and the other end is fixed on the skeleton on the other side of the greenhouse.
  • the ratchet portion of the tensioner is disposed in the shaft hole, and the normal rotating reel can rotate with the reel in the shaft hole when tightening the lamination belt, and can be lifted up under the tension force to be stuck on the card Positioning in the mouth, and the bayonet is placed on the bracket, the overall strength is large, even if it is a long time, there will be no deformation failure, which can make the lamination belt The tension is finally maintained, and the tensioning effect and the stability after tensioning are better.
  • the ratchet outer diameter of the ratchet portion is less than or equal to the bore diameter of the shaft hole.
  • the above design enables the ratchet portion to freely rotate in the shaft hole without interfering with the inner wall of the shaft hole, that is, the reel can be smoothly rotated to tighten the lamination belt, and after tightening, the pulling force is pulled down.
  • the reel drives the ratchet portion to move up into the bayonet to achieve positioning, which ensures a better tensioning effect and stability after tensioning.
  • the bayonet has a planar abutting surface and an arcuate guiding surface, and the ratchet can abut against the abutting surface when the ratchet is caught in the bayonet on.
  • the arc-shaped guiding surface is arranged such that the ratchet can rotate along the arc direction of the guiding surface, and the planar abutting surface plays the role of positioning, that is, the one-way rotation and the one-way positioning of the ratchet can be realized, that is, the ratchet part
  • the reel and the ratchet portion can continue to rotate along the curved guiding surface to further tighten the laminating strip, and in the opposite direction, the rotating film strip can not be rotated to ensure the lamination of the lamination.
  • the compact operation is convenient, and the positioning effect is ensured, the tensioning effect and the stability after tensioning are good.
  • the ratchet of the ratchet portion has a planar limiting tooth surface and an arcuate guiding tooth surface, and when the ratchet is caught in the bayonet, the guiding tooth surface is The guiding surfaces are opposite, and the limiting tooth surface can abut against the abutting surface.
  • the reel and the ratchet portion can continue to rotate and further tighten under the cooperation of the curved guiding tooth surface and the curved guiding surface.
  • the operation is smoother. After tightening, the limiting tooth surface and the abutting surface abut against each other so that the reel does not rotate in the opposite direction, thereby further improving the tightening effect and the stability after tightening.
  • the bayonet penetrates the two plate faces of the side plates, and the width of the ratchet portion in the direction of the spool axis is larger than the thickness of the side plates.
  • the above design enables the ratchet portion of the ratchet portion and the inner wall of the bayonet to always maintain the maximum abutment area even if the reel is slightly biased, and the reel can be effectively prevented from being reversed. Loose, further guarantees better tightening effect and tightening Stability.
  • the reel has two limiting protrusions, and the two limiting protrusions are located between the two ratchet portions, and the two limiting protrusions can respectively abut against the two side plates, and the threading holes are located Between the two limit projections.
  • the design of the two limiting edges can limit the reel so that the ratchet portion of the reel does not detach from the shaft hole, so that a good tightening effect can be maintained at all times.
  • the bracket further includes a mounting plate at the top, the two ends of the mounting plate are respectively connected to the upper ends of the two side plates, and the mounting plate is provided with a through hole, and the reel is further Threading holes are provided.
  • the threading hole is used for fixing the laminating strip, and the design of the through hole at the top of the bracket can play a limit guiding effect on the laminating strip without displacement, and the laminating strip abuts against the edge of the through hole.
  • a tensioning trend is formed, which further enhances the tightening effect and the stability after tensioning.
  • the whole bracket can be formed by bending a stainless steel plate, which is convenient to manufacture.
  • the through hole and the threading hole are both strip holes. Both the through hole and the threading hole are strip-shaped holes, so that the tensioner can simultaneously satisfy the tensioning of the rope-shaped lamination belt and the flat lamination belt, especially for the flat laminating belt.
  • the bracket further includes a connecting portion at the bottom, the connecting portion is a connecting plate, the connecting plate has a circular arc segment and a flat plate segment, and the circular arc segment and one of the side plates The lower end is integrated, and the flat plate section abuts against the plate surface of the other side plate and is riveted by rivets.
  • the bracket further includes a connecting portion at the bottom, and the lower ends of the two side plates each have a connecting flange formed by inwardly folding, and the two connecting flanges are superposed on each other, and the connecting portion is
  • the hook is rotatably coupled to the connecting flange.
  • the hook includes a hook body and a connecting post at one end of the hook body, and the connecting flanges are respectively provided with through connecting holes and the two connecting holes are oppositely disposed, and the hook body has one end of the connecting column The end face abuts against the edge of the connecting hole, and the connecting post passes through the two connecting holes and is fixed by the lock nut.
  • the bracket can be rotated relative to the hook, so that the pressing strip can be adjusted to better fit the plastic film by rotating the bracket, and after the adjustment is completed, the locking nut is locked and fixed.
  • the connecting post has a chamfered end through one end end of the connecting hole.
  • the chamfered design enables the connecting post to pass through the connecting hole more conveniently.
  • both ends of the mounting plate are respectively connected to the upper end arc of the two side plates and are integrally formed, and one end portion of the reel has a force portion for the tool to connect the rotating reel.
  • the design of the force department can be connected with the tool to facilitate the rotation of the reel to tighten the film strip.
  • the force-applying portion has a columnar shape and has a square or regular hexagonal cross section.
  • the tool can be a square or hex socket.
  • the present strap has the following advantages:
  • the ratchet part is arranged in the shaft hole.
  • the eccentrically moving card can be positioned in the bayonet under the action of the tensioning force, the reel and the reel
  • the ratchet portion can continue to rotate along the curved guiding surface of the bayonet to further tighten the laminating strip, and in the opposite direction, it cannot rotate, and the bayonet is disposed on the bracket, and the overall strength is large, even if the time is long. Deformation failure will occur, which will keep the laminating tape tensioned at all times, and the tensioning effect and stability after tensioning are better.
  • the design of the strip-shaped through-hole at the top of the bracket can simultaneously satisfy the tensioning of the rope-shaped laminating strip and the flat laminating strip, and at the same time, can also set a limit on the laminating strip. The action does not occur, and the tension of the laminating tape against the edge of the through hole forms a tensioning tendency, which further improves the tensioning effect and the stability after tensioning.
  • the joint between the connecting part and the beam of the greenhouse is a hard contact between the surface and the surface, and the stability is better than the existing fixing by the rope.
  • Figure 1 is a perspective view of the first embodiment of the belt tensioner.
  • Figure 2 is a perspective view of the other embodiment of the present belt tightener.
  • Figure 3 is a front elevational view of the first embodiment of the belt tensioner.
  • Figure 4 is a side elevational view of the first embodiment of the belt tensioner.
  • Fig. 5 is a schematic structural view of a bracket of the embodiment.
  • Figure 6 is a structural view of a reel.
  • Figure 7 is a structural view of the second embodiment of the belt tightener.
  • Figure 8 is a structural view of the hook of the second embodiment.
  • bracket 1a, side plate; 1b, shaft hole; 1c, through hole; 1d, bayonet; 1d1, abutment surface; 1d2, guiding surface; 1e, connecting portion; 1e1, connecting plate; Arc segment; 1e12, plate segment; 1e2, hook; 1e21, hook body; 1e22, connecting column; 1f, mounting plate; 1g, connecting flange; 2, reel; 2a, ratchet portion; 2a1, limiting tooth surface; 2a2, guiding tooth surface; 2b, threading hole; 2c, limiting convex edge; 2d, force portion; 3, rivet; 4, lock nut.
  • the belt tightener can be used on a greenhouse, including the bracket 1 and the spool 2.
  • the bracket 1 has two opposite side plates 1a and a mounting plate 1f at the top. And a connecting portion 1e at the bottom that can be connected to the greenhouse skeleton.
  • the connecting portion 1e is a connecting plate 1e1, and the connecting plate 1e1 has a circular arc segment 1e11 and a flat plate segment 1e12.
  • the circular arc segment 1e11 is integrally connected with the lower end of the one side plate 1a, and the flat plate segment 1e12 is attached to the plate surface of the other side plate 1a.
  • the two ends of the mounting plate 1f are respectively connected with the upper end arc of the two side plates 1a and are integrally formed.
  • the mounting plate 1f is provided with a through hole 1c through which the laminating tape can pass, and the reel 2 is also provided with a threading hole.
  • both the through hole 1c and the threading hole 2b are strip-shaped holes, so that the present belt tightener can simultaneously satisfy the tensioning of the rope-shaped lamination belt and the flat lamination belt, particularly for the flat lamination belt.
  • a shaft hole 1b is defined in both side plates 1a, and both ends of the reel 2 have a ratchet portion 2a.
  • the two ends of the reel 2 are respectively disposed in the corresponding shaft holes 1b, and the outer diameter of the ratchet portion 2a is less than or equal to
  • the aperture of the shaft hole 1b, the ratchet portion 2a is located in the corresponding shaft hole 1b and is rotatable in the shaft hole 1b with the spool 2.
  • the upper inner wall of the shaft hole 1b has a bayonet 1d, and the bayonet 1d penetrates the two plate faces of the side plate 1a.
  • the ratchet of the ratchet portion 2a can be eccentrically moved by an external force to position one of the ratchets into the bayonet 1d.
  • the width of the ratchet portion 2a in the axial direction of the spool 2 is larger than the thickness of the side panel 1a.
  • the bayonet 1d has a planar abutting surface 1d1 and an arcuate guiding surface 1d2, and the ratchet of the ratchet portion 2a has a planar limit.
  • the tooth surface 2a1 and the curved tooth surface 2a2 are curved.
  • the guide tooth surface 2a2 is opposed to the guide surface 1d2, and the limiting tooth surface 2a1 can abut against the abutting surface 1d1.
  • the reel 2 has two limiting protrusions 2c, and the two limiting protrusions 2c are located between the two ratchet portions 2a.
  • the two limiting protrusions 2c can respectively abut against the two side plates 1a, and can have a limit on the reel 2
  • the action is such that the ratchet portion 2a of the spool 2 does not disengage from the shaft hole 1b, and the threading hole 2b is located between the two limit projections 2c.
  • One end of the reel 2 further has a force portion 2d for attaching the rotating reel 2 to the tool, which facilitates the rotation of the reel 2 Film strip.
  • the force portion 2d is columnar and has a square or regular hexagonal cross section, and the tool may be a square or hexagonal sleeve. In this embodiment, the cross section of the force portion 2d is square.
  • the beam of the greenhouse frame is directly inserted into the gap between the connecting plate 1e1 and the reel 2, and the lamination tape is pulled out to be pressed against the plastic film and the free end of the laminating tape is fixed.
  • the rotating reel 2 tightens the lamination belt so that the laminating tape is tensioned to position the plastic film on the greenhouse frame, and the bracket 1 is lifted upward, and the arc segment 1e11 of the connecting plate 1e1 is
  • the beam of the greenhouse frame is tensioned and fixed, and the ratchet of the ratchet portion 2a is moved up into the bayonet 1d by the tensioning force, and the cooperation of the curved guiding tooth surface 2a2 and the curved guiding surface 1d2 is performed.
  • the reel 2 can be further rotated to further tighten the laminating strip. After tightening, under the action of the reverse force, the limiting tooth surface 2a1 on the ratchet abuts against the abutting surface 1d1 so that the reel 2 does not reverse direction. Rotate to prevent the laminating tape from loosening, the tensioning effect and the stability after tensioning.
  • the structure of the tensioner of this embodiment is basically the same as that of the first embodiment, and the difference is that, as shown in FIG. 7-8, the lower ends of the two side plates 1a each have a connecting flange 1g formed by inwardly folding, two The connecting flanges 1g are superposed on each other.
  • the connecting portion 1e is a hook 1e2, and the hook 1e2 includes a hook body 1e21 and a connecting post 1e22 at one end of the hook body 1e21.
  • the two connecting flanges 1g are respectively provided with a through connecting hole and two connecting holes are oppositely arranged, and the hook body 1e21 has a connecting column.
  • the end surface of one end of the 1e22 abuts against the edge of the connecting hole, the end end through which the connecting post 1e22 passes has a chamfer, and the connecting post 1e22 passes through the two connecting holes and is locked and fixed by the lock nut 4.
  • the tensioner is hooked on the beam of the greenhouse frame by the hook 1e2 and then fixed by the tensioning force.
  • the hook 1e2 is rotatably connected to the connecting flange 1g, that is, the bracket 1 can be rotated relative to the hook 1e2, thereby being adjustable by rotating the bracket 1.
  • the laminating tape can better fit the plastic film, further enhancing the tensioning effect.

Abstract

一种紧带器包括支架(1)和卷轴(2)，支架(1)具有两相对设置的侧板(1a)，两侧板(1a)上均开设有轴孔(1b)，卷轴(2)的两端处均具有棘轮部(2a)，棘轮部(2a)位于对应的轴孔(1b)内且能够随着卷轴(2)在轴孔(1b)内转动，轴孔(1b)的上侧内壁上开设有凹入的卡口(1d)，棘轮部(2a)在外力作用下能够偏心移动使其中一个棘齿卡入卡口(1d)内。该紧带器的棘轮部设置在轴孔内，收紧后在拉紧力的作用下能够偏心移动而卡在卡口内，而卡口是设置在支架上的，整体的强度较大，即使时间久了也不会出现变形失效，拉紧的效果和拉紧后的稳定性较好。它解决了现有紧线器的止逆扣强度较差、时间久了容易变形失效、拉绳会出现松动从而造成拉紧的效果和拉紧后的稳定性都较差的问题。

Description

一种紧带器 技术领域
本发明属于机械技术领域，涉及一种紧带器。
背景技术
大棚是一种具有出色的保温性能的框架覆膜结构，是现代农业生产过程中十分重要的设施，在我国大部分地区的农业生产中得到广泛的应用。而塑料薄膜则是农业大棚中常用的材料，然而，由于塑料薄膜的材质柔软，在大棚中使用时由于大棚薄膜的面积较大，因此，现有的大棚薄膜大多是借助于刚性的骨架来支撑，而为了使塑料薄膜定位在骨架上，一般都采用绳子拉紧进行固定。
为了绳子拉紧方便，一般都是通过紧线器来实现。如中国专利申请(申请号：201210338780.1)公开了一种棘轮式紧线器，其包括框架、棘轮组件和止逆扣，所述棘轮组件和止逆扣安装与框架上，其中，所述框架包括平行间隔设置的两个侧板，所述两个侧板的一端通过折弯部连为一体，所述棘轮组件包括安装轴以及位于安装轴两端的棘轮，所述安装轴上开设有多个穿线孔，所述两个侧板上对应开设有棘轮安装孔，所述棘轮组件通过安装轴穿设与棘轮安装孔内可转动地设置于两个侧板之间，且所述两个侧板上还对应开设有用于卡设止逆扣的卡孔。又如美国专利申请(公开号：US2002/0063247A1)公开的一种棘轮式紧线器。
上述的紧线器虽然都能使绳子保持拉紧状态，但其仍存在以下缺陷：1、上述的棘轮式紧线器转动棘轮使拉绳收紧于安装轴上后，均是通过装配止逆扣来防止钢丝绳再次松动，而止逆扣都是采用钢丝折弯形成的，强度较差，时间久了容易变形失效，棘轮卡在止逆扣上容易出现打滑，拉绳会出现松动，从而造成拉紧的效果和拉紧 后的稳定性都较差；2、上述棘轮式紧线器的固定是通过绳索穿过折弯部上的两个通孔然后固定在大棚骨架上的，而用于拉紧大棚的拉绳收紧后没有限位，容易出现位移，特别是针对扁平状的压膜绳，从而造成拉紧的效果和稳定性都较差。
发明内容
本发明的目的是针对现有的技术存在上述问题，提出了一种紧带器，本发明所要解决的技术问题是：如何提高压膜带的拉紧效果和拉紧后的稳定性。
本发明的目的可通过下列技术方案来实现：一种紧带器，包括支架和卷轴，所述支架具有两相对设置的侧板，两侧板上均开设有轴孔，所述卷轴的两端处均具有棘轮部，其特征在于，所述棘轮部位于对应的轴孔内且能够随着卷轴在轴孔内转动，所述轴孔的上侧内壁上开设有凹入的卡口，所述棘轮部在外力作用下能够偏心移动使其中一个棘齿卡入上述卡口内。
本紧带器主要用于大棚上，使用时，将本紧带器连接在大棚一侧的骨架上，压膜带一端通过固定在卷轴上，另一端固连在大棚另一侧的骨架上，并将压膜带贴合压紧在塑料薄膜上，转动卷轴收紧压膜带使得压膜带拉紧将塑料薄膜定位在大棚骨架上，然后松开卷轴，在压膜带拉紧力的作用下能够拉动卷轴往上提，从而使得棘轮部偏心向上移动使得其中一个棘齿卡入轴孔的上侧内壁上的卡口内实现定位，使得卷轴反向转动，防止压膜带松动。当然，本紧带器还可用于其他场合的拉紧固定。
本紧带器的棘轮部设置在轴孔内，正常转动卷轴收紧压膜带时能够随着卷轴在轴孔内转动，收紧后在拉紧力的作用下能够被上提从而卡在卡口内定位，而卡口是设置在支架上的，整体的强度较大，即使时间久了也不会出现变形失效，能够使得压膜带始 终保持拉紧状态，拉紧的效果和拉紧后的稳定性较好。
在上述的紧带器中，所述棘轮部的棘齿外径小于或等于轴孔的孔径。上述的设计，能够使得棘轮部在轴孔内能够自由的转动，不会与轴孔的内壁产生干涉，即可以顺畅的转动卷轴收紧压膜带，收紧后在拉紧力的作用下拉动卷轴带动棘轮部一同上移卡入卡口中实现定位，保证了较好的拉紧的效果和拉紧后的稳定性。
在上述的紧带器中，所述卡口具有呈平面状的的抵靠面和呈弧形的导向面，当所述棘齿卡在卡口内时所述棘齿能够抵靠在抵靠面上。弧形导向面的设置，使得棘轮能够沿着导向面的弧形方向转动，而平面状的抵靠面则起到定位的作用，即能够实现棘轮的单向转动和单向定位，即棘轮部的棘齿在拉紧力的作用下上移卡入卡口后，卷轴和棘轮部能够沿着弧形导向面继续转动进一步收紧压膜带，反方向，则不能转动，保证压膜带收紧操作方便的同时，又能保证较好的定位效果，拉紧的效果和拉紧后的稳定性好。
在上述的紧带器中，所述棘轮部的棘齿具有呈平面状的限位齿面和呈弧形的导向齿面，当所述棘齿卡在卡口内时，所述导向齿面与所述导向面相对，所述限位齿面能够抵靠在抵靠面上。上述的设计，当棘轮部的棘齿在拉紧力的作用下上移卡入卡口后，卷轴和棘轮部能够在弧形导向齿面和弧形导向面的配合作用下继续转动进一步收紧，操作较为顺畅，收紧后限位齿面与抵靠面抵靠实现定位使得卷轴不会反方向转动，进一步提高了收紧的效果和收紧后的稳定性。
在上述的紧带器中，所述卡口贯穿侧板的两板面，所述棘轮部沿卷轴轴线方向上的宽度大于所述侧板的厚度。上述的设计，使得压膜带被拉紧后，即使卷轴出现细微的偏移，棘轮部的棘齿与卡口的内壁始终能够保持最大的抵靠面积，能够有效的防止卷轴翻转使得压膜带松动，进一步保证了较好的收紧效果和收紧后 的稳定性。
在上述的紧带器中，所述卷轴上具有两限位凸沿，两限位凸沿位于两棘轮部之间，两限位凸沿能够分别与两侧板抵靠，所述穿线孔位于两限位凸沿之间。两限位凸沿的设计，能够对卷轴起到一个限位作用，使得卷轴的棘轮部不会从轴孔中脱离，从而能够始终保持较好的收紧效果。
在上述的紧带器中，所述支架还包括位于顶部的安装板，所述安装板的两端分别与两侧板的上端连接，所述安装板上开设有通孔，所述卷轴上还开设有穿线孔。穿线孔用于压膜带的固定，支架顶部通孔的设计，能够对压膜带起到一个限位导向的作用，不会出现位移，而且压膜带拉紧后与通孔的边沿抵靠又会形成一个张紧趋势，进一步提高了拉紧的效果和拉紧后的稳定性。支架整体可通过不锈钢板弯折形成，制作方便。
在上述的紧带器中，所述通孔和穿线孔均为条形孔。通孔和穿线孔均为条形孔，从而使得本紧带器能够同时满足绳状的压膜带和扁平状的压膜带的拉紧使用，特别是针对扁平状的压膜带。
在上述的紧带器中，所述支架还包括位于底部的连接部，所述连接部为连接板，所述连接板具有圆弧段和平板段，所述圆弧段与其中一侧板的下端连为一体，平板段与另一侧板的板面相贴靠且通过铆钉铆接。在大棚上使用时，大棚骨架的横梁直接穿在连接板与卷轴之间的空隙内，在拉紧力的作用下，支架整个被往上提，连接板的圆弧段与大棚骨架的横梁抵靠被拉紧固定。圆弧段与横梁的形状匹配，两者之间为面面接触，相对于现有的通过绳索固定，稳定性更好。
在上述的紧带器中，所述支架还包括位于底部的连接部，两侧板的下端均具有向内翻折形成的连接翻边，两连接翻边相互叠合贴靠，所述连接部为挂钩，所述挂钩转动连接在所述连接翻边上。本紧带器在大棚上使用时，通过挂钩钩在大棚骨架的横梁上 然后通过拉紧力拉紧固定，挂钩与横梁之间为面与面的硬接触，相对于现有的通过绳索固定，稳定性更好。而且，挂钩转动连接在连接翻边上，即支架能够相对挂钩转动，从而通过转动支架能够调整压膜带能够更好的与塑料薄膜贴合，进一步提高了拉紧的效果。
在上述的紧带器中，所述挂钩包括钩体和位于钩体一端的连接柱，两连接翻边上均开设有贯穿的连接孔且两连接孔相对设置，所述钩体具有连接柱一端的端面抵靠在连接孔的边沿处，所述连接柱穿过两连接孔并通过锁紧螺母锁紧固定。通过连接柱的作用，支架能够相对挂钩转动，从而通过转动支架能够调整压膜带能够更好的与塑料薄膜贴合，调整完成后，通过锁紧螺母锁紧固定。
在上述的紧带器中，所述连接柱穿过连接孔的一端端部具有倒角。倒角的设计，能够使得连接柱能够更方便的穿过连接孔。
在上述的紧带器中，所述安装板的两端分别与两侧板的上端圆弧过渡连接且为一体式结构,所述卷轴的一端部具有可供工具连接转动卷轴的着力部。着力部的设计，能够与工具连接，方便转动卷轴收紧压膜带。作为优选，所述着力部呈柱状且截面呈正方形或正六边形。工具可以为四角套筒或六角套筒。
与现有技术相比，本紧带器具有以下优点:
1、棘轮部设置在轴孔内，正常转动卷轴收紧压膜带时能够随着卷轴在轴孔内转动，收紧后在拉紧力的作用下能够偏心移动卡在卡口内定位，卷轴和棘轮部能够沿着卡口的弧形导向面继续转动进一步收紧压膜带，反方向，则不能转动，而卡口是设置在支架上的，整体的强度较大，即使时间久了也不会出现变形失效，能够使得压膜带始终保持拉紧状态，拉紧的效果和拉紧后的稳定性较好。
2、支架顶部条形通孔的设计，能够同时满足绳状的压膜带和扁平状的压膜带的拉紧使用，同时还能够对压膜带起到一个限位 的作用，不会出现位移，而且压膜带拉紧后与通孔的边沿抵靠又会形成一个张紧趋势，进一步提高了拉紧的效果和拉紧后的稳定性。
3、连接部与大棚的横梁之间为面与面的硬接触，相对于现有的通过绳索固定，稳定性更好。
附图说明
图1是实施例一本紧带器的立体图。
图2是实施例一本紧带器另一个方向的立体图。
图3是实施例一本紧带器的主视图。
图4是实施例一本紧带器的侧视图。
图5是实施例一支架的结构示意图。
图6是卷轴的结构图。
图7是实施例二本紧带器的结构图。
图8是实施例二挂钩的结构图。
图中，1、支架；1a、侧板；1b、轴孔；1c、通孔；1d、卡口；1d1、抵靠面；1d2、导向面；1e、连接部；1e1、连接板；1e11、圆弧段；1e12、平板段；1e2、挂钩；1e21、钩体；1e22、连接柱；1f、安装板；1g、连接翻边；2、卷轴；2a、棘轮部；2a1、限位齿面；2a2、导向齿面；2b、穿线孔；2c、限位凸沿；2d、着力部；3、铆钉；4、锁紧螺母。
具体实施方式
以下是本发明的具体实施例并结合附图，对本发明的技术方案作进一步的描述，但本发明并不限于这些实施例。
实施例一
如图1-6所示，本紧带器能够大棚上使用，包括支架1和卷轴2。支架1具有两相对设置的侧板1a、位于顶部的安装板1f 和位于底部具有能够与大棚骨架相连接的连接部1e。
连接部1e为连接板1e1，连接板1e1具有圆弧段1e11和平板段1e12，圆弧段1e11与其中一侧板1a的下端连为一体，平板段1e12与另一侧板1a的板面相贴靠且通过铆钉3铆接，连接板1e1与卷轴2之间的空隙可供大棚骨架穿过。安装板1f的两端分别与两侧板1a的上端圆弧过渡连接且为一体式结构，安装板1f上开设有可供压膜带穿过的通孔1c，卷轴2上还开设有穿线孔2b，压膜带一端通过卷轴2上的穿线孔2b固定在卷轴2上，另一端穿过通孔1c固连在大棚的骨架上。通孔1c和穿线孔2b均为条形孔，从而使得本紧带器能够同时满足绳状的压膜带和扁平状的压膜带的拉紧使用，特别是针对扁平状的压膜带。
两侧板1a上均开设有轴孔1b，卷轴2的两端处均具有棘轮部2a，卷轴2两端分别穿设在对应的轴孔1b内，棘轮部2a的棘齿外径小于或等于轴孔1b的孔径，棘轮部2a位于对应的轴孔1b内且能够随着卷轴2在轴孔1b内转动。轴孔1b的上侧内壁上具有卡口1d，卡口1d贯穿侧板1a的两板面，棘轮部2a的棘齿在外力作用下能够偏心移动使其中一个棘齿卡入卡口1d内定位，棘轮部2a沿卷轴2轴线方向上的宽度大于所述侧板1a的厚度，
具体地说，如图1、4、5和6所示，卡口1d具有呈平面状的的抵靠面1d1和呈弧形的导向面1d2，棘轮部2a的棘齿具有呈平面状的限位齿面2a1和呈弧形的导向齿面2a2，当棘齿卡在卡口1d内时，导向齿面2a2与导向面1d2相对，限位齿面2a1能够抵靠在抵靠面1d1上。
卷轴2上具有两限位凸沿2c，两限位凸沿2c位于两棘轮部2a之间，两限位凸沿2c能够分别与两侧板1a抵靠，能够对卷轴2起到一个限位作用，使得卷轴2的棘轮部2a不会从轴孔1b中脱离，穿线孔2b位于两限位凸沿2c之间。卷轴2的一端部还具有可供工具连接转动卷轴2的着力部2d，方便转动卷轴2收紧压 膜带。着力部2d呈柱状且截面呈正方形或正六边形，工具可以为四角套筒或六角套筒。本实施例中，着力部2d的截面呈正方形。
本紧带器使用时，大棚骨架的横梁直接穿在连接板1e1与卷轴2之间的空隙内，拉出压膜带使其贴合压紧在塑料薄膜上并将压膜带的自由端固定在大棚骨架另一侧的横梁上，转动卷轴2收紧压膜带使得压膜带拉紧将塑料薄膜定位在大棚骨架上，支架1整个被往上提，连接板1e1的圆弧段1e11与大棚骨架的横梁抵靠被拉紧固定，棘轮部2a的棘齿在拉紧力的作用下上移卡入卡口1d内，通过弧形导向齿面2a2和弧形导向面1d2的配合作用，能够继续转动卷轴2将压膜带进一步收紧，收紧后在反向作用力的作用下，棘齿上的限位齿面2a1与抵靠面1d1抵靠实现定位使得卷轴2不会反方向转动，防止压膜带松动，拉紧的效果和拉紧后的稳定性好。
实施例二
本实施例的紧带器的结构与实施例一基本相同，其不同之处在于：如图7-8所示，两侧板1a的下端均具有向内翻折形成的连接翻边1g，两连接翻边1g相互叠合贴靠。连接部1e为挂钩1e2，挂钩1e2包括钩体1e21和位于钩体1e21一端的连接柱1e22，两连接翻边1g上均开设有贯穿的连接孔且两连接孔相对设置，钩体1e21具有连接柱1e22一端的端面抵靠在连接孔的边沿处，连接柱1e22穿过的一端端部具有倒角，连接柱1e22穿过两连接孔并通过锁紧螺母4锁紧固定。本紧带器通过挂钩1e2钩在大棚骨架的横梁上然后通过拉紧力拉紧固定，挂钩1e2转动连接在连接翻边1g上，即支架1能够相对挂钩1e2转动，从而通过转动支架1能够调整压膜带能够更好的与塑料薄膜贴合，进一步提高了拉紧的效果。
本文中所描述的具体实施例仅仅是对本发明精神作举例说明。本发明所属技术领域的技术人员可以对所描述的具体实施例 做各种各样的修改或补充或采用类似的方式替代，但并不会偏离本发明的精神或者超越所附权利要求书所定义的范围。

Claims (10)

  1. 一种紧带器，包括支架(1)和卷轴(2)，所述支架(1)具有两相对设置的侧板(1a)，两侧板(1a)上均开设有轴孔(1b)，所述卷轴(2)的两端处均具有棘轮部(2a)，其特征在于，所述棘轮部(2a)位于对应的轴孔(1b)内且能够随着卷轴(2)在轴孔(1b)内转动，所述轴孔(1b)的上侧内壁上开设有凹入的卡口(1d)，所述棘轮部(2a)在外力作用下能够偏心移动使其中一个棘齿卡入上述卡口(1d)内。
  2. 根据权利要求1所述的紧带器，其特征在于，所述支架(1)还包括位于顶部的安装板(1f)，所述安装板(1f)的两端分别与两侧板(1a)的上端连接，所述安装板(1f)上开设有通孔(1c)，所述卷轴(2)上还开设有穿线孔(2b)，所述通孔(1c)和穿线孔(2b)均为条形孔。
  3. 根据权利要求1所述的紧带器，其特征在于，所述卡口(1d)具有呈平面状的的抵靠面(1d1)和呈弧形的导向面(1d2)，当所述棘齿卡在卡口(1d)内时所述棘齿能够抵靠在抵靠面(1d1)上。
  4. 根据权利要求3所述的紧带器，其特征在于，所述棘轮部(2a)的棘齿具有呈平面状的限位齿面(2a1)和呈弧形的导向齿面(2a2)，当所述棘齿卡在卡口(1d)内时，所述导向齿面(2a2)与所述导向面(1d2)相对，所述限位齿面(2a1)能够抵靠在抵靠面(1d1)上。
  5. 根据权利要求1或2或3或4所述的紧带器，其特征在于，所述卡口(1d)贯穿侧板(1a)的两板面，所述棘轮部(2a)沿卷轴(2)轴线方向上的宽度大于所述侧板(1a)的厚度。
  6. 根据权利要求1或2或3或4所述的紧带器，其特征在于，所述卷轴(2)上具有两限位凸沿(2c)，两限位凸沿(2c)位于两棘轮部(2a)之间，两限位凸沿(2c)能够分别与两侧板(1a)抵靠，所述穿线孔(2b)位于两限位凸沿(2c)之间。
  7. 根据权利要求1或2或3或4所述的紧带器，其特征在于， 所述棘轮部(2a)的棘齿外径小于或等于轴孔(1b)的孔径。
  8. 根据权利要求1或2或3或4所述的紧带器，其特征在于，所述支架(1)还包括位于底部的连接部(1e)，所述连接部(1e)为连接板(1e1)，所述连接板(1e1)具有圆弧段(1e11)和平板段(1e12)，所述圆弧段(1e11)与其中一侧板(1a)的下端连为一体，平板段(1e12)与另一侧板(1a)的板面相贴靠且通过铆钉(3)铆接。
  9. 根据权利要求1或2或3或4所述的紧带器，其特征在于，所述支架(1)还包括位于底部的连接部(1e)，两侧板(1a)的下端均具有向内翻折形成的连接翻边(1g)，两连接翻边(1g)相互叠合贴靠，所述连接部(1e)为挂钩(1e2)，所述挂钩(1e2)转动连接在所述连接翻边(1g)上。
  10. 根据权利要求2所述的紧带器，其特征在于，所述安装板(1f)的两端分别与两侧板(1a)的上端圆弧过渡连接且为一体式结构,所述卷轴(2)的一端部具有可供工具连接转动卷轴(2)的着力部(2d)。
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JPH02217649A (ja) * 1989-02-17 1990-08-30 Suda Seisakusho:Kk バンド締付器
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