CN220123508U - Branch pulling device - Google Patents

Abstract

The utility model discloses a branch pulling device which comprises a first arc-shaped clamping plate and a second arc-shaped clamping plate, wherein symmetrically distributed threaded columns are hinged at the joint of the second arc-shaped clamping plate and the first arc-shaped clamping plate, clamping grooves corresponding to the positions and the numbers of the threaded columns are formed at the joint of the first arc-shaped clamping plate and the second arc-shaped clamping plate, and butterfly nuts are connected to the outer walls of the threaded columns in a threaded manner. This draw branch device can realize that traction mechanism's tensile regulation, angle modulation and carry out position control around the surface of first arc splint and second arc splint, adjusts traction mechanism to a suitable position on, then directly block into traction mechanism's inside with side branch or the young branch of fruit tree, in the inside in-process of card income traction mechanism, two spacing screens pole are to the inside elasticity upset of effect through the torsional spring of traction frame, get into the inside of traction frame completely at side branch or young branch, two spacing screens pole can automatic re-setting.

Description

Branch pulling device

Technical Field

The utility model relates to the technical field of fruit tree planting, in particular to a branch pulling device.

Background

The branch pulling is the most commonly used shaping technology for fruit tree cultivation, the structure of the fruit tree body can be controlled manually through the branch pulling, the vigorous nutrition growth of the fruit tree is restrained, meanwhile, the illumination condition of the tree body can be effectively improved through the branch pulling, the light receiving area of the fruit tree is increased, the light energy utilization rate of the fruit tree is improved, and the guarantee is provided for the high-quality and high-yield of the fruit.

The utility model discloses a chinese patent discloses a tree branch pulling device, it includes first installation pole and second installation pole, first fixation clamp is all installed at the both ends of first installation pole, install the second fixation clamp on the second installation pole, first fixation clamp includes first clamp, second clamp and axis body, first through-hole, mounting groove and draw-in groove have been seted up on the first clamp for solve present fruit grower and pull very irregular at the in-process of branch, pull branch instrument and select rope commonly, pull branch line fixed inconvenient, be inconvenient for controlling the pulling intensity and adjust the growth angle of young branch, it is relatively poor to pull branch effect.

Aiming at the related technology, the device has a plurality of defects, in the actual use process, only one young branch or side branch can be pulled and shaped at a time, and the young branch or side branch of one fruit tree needs to be pulled far from one branch, if a plurality of devices are adopted, the device has larger vertical span, and the trunk of the fruit tree is not provided with more positions for the device to be installed, so that certain limitation exists in use, and the device is inconvenient for people to use, therefore, the device for pulling the branches for planting the fruit tree is necessary to solve the technical problems.

Disclosure of Invention

The main objective of the present utility model is to provide a branch pulling device to solve the above-mentioned problems in the prior art.

In order to achieve the above object, the present utility model provides a branch pulling device, comprising:

a first arc splint;

the first arc clamping plate and the two ends of the second arc clamping plate are respectively and detachably connected, a slideway is arranged on the outer surface of the first arc clamping plate, a sliding block is slidably arranged on the slideway, a fixed support is fixedly arranged on the outer surface of the sliding block, a transverse shaft is rotatably arranged on the fixed support, a fixed cylinder is fixedly arranged on the outer wall of the transverse shaft, and a positioning mechanism is arranged on the outer wall of the transverse shaft; a movable rod is slidably arranged in the fixed cylinder, a through hole penetrating through the inside and the outside is formed in the side wall of the movable rod, and a plurality of positioning grooves are formed in the side wall of the movable rod; and

The traction mechanism comprises a traction frame, the traction frame is installed at one end of the movable rod, which is located at the outer side of the fixed cylinder, mounting seats are fixedly installed at two sides of the two ends, the mounting seats are rotatably provided with limiting clamping rods through rotating shafts on the mounting seats, and the adjusting piece part penetrates through the through hole and can be clamped into a corresponding positioning groove when aligned with one positioning groove.

Optionally, the standing groove has all been seted up on the internal surface of first arc splint and second arc splint, the inside of standing groove is provided with the regulation splint, screw hole threaded connection that first arc splint and second arc splint all seted up on its external surface has accommodate the lead screw, and accommodate the one end of lead screw and extend to the inside of standing groove and rotate with the regulation splint and be connected.

Optionally, the first arc splint and the second arc splint are all provided with the gag lever post through the slide hole slidable mounting who offers to be symmetrical distribution on the external surface, and the one end and the corresponding regulation splint fixed connection of gag lever post, the one end fixed mounting who keeps away from regulation splint has the hand wheel of accommodate the lead screw.

Optionally, a plurality of second screw holes are all seted up on the surface of first arc splint and second arc splint, first screw hole has been seted up on the slider, threaded connection has the second butterfly bolt on the second screw hole, and the quantity of second butterfly bolt is four, four the second butterfly bolt divide into two sets of respectively arrange in on the second screw hole of first arc splint and second arc splint surface.

Optionally, the first stopper of symmetry distribution is fixed mounting on the inside wall of traction frame, fixed mounting has the second stopper on the outer wall of spacing kelly, the torsional spring has been cup jointed on the pivot outer wall on the mount pad, fixed mounting has the dog of symmetry distribution on the inside wall of traction frame.

Optionally, the positioning mechanism includes the commentaries on classics board, and the fixed cover of commentaries on classics board is connected in on the outer wall of cross axle, a plurality of third screw holes have been seted up to one side of commentaries on classics board, the screw hole threaded connection that the fixing support was seted up through its one side has the third butterfly bolt.

Optionally, a first elastic pad is adhered to the inner surface of the adjusting clamping plate, and a second elastic pad is adhered to the inner surface of the traction frame.

Optionally, the both ends of first arc splint extend respectively and have first edge, first edge orientation the one side that the second arc splint is located is provided with the screw thread post, the both ends of second arc splint extend respectively and have the second edge, the draw-in groove has been seted up to the second edge correspondence screw thread post, the screw thread post passes corresponding draw-in groove and locks into the fastener.

Optionally, the first edge and the second edge are parallel to each other.

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

according to the technical scheme, through the cooperation of the first arc clamping plate, the second arc clamping plate, the threaded column, the slide way, the fixed barrel, the adjusting piece, the positioning groove, the positioning mechanism, the traction mechanism, the sliding block, the transverse shaft, the fixed support, the torsion spring and the limiting rod, the stretching adjustment and the angle adjustment of the traction mechanism and the position adjustment around the outer surfaces of the first arc clamping plate and the second arc clamping plate can be realized, the traction mechanism is adjusted to a proper position, then the side branches or the young branches of a fruit tree are directly clamped into the traction mechanism, in the process of clamping into the traction mechanism, the two limiting clamping rods elastically overturn towards the inside of the traction mechanism through the action of the torsion spring, the two limiting clamping rods can automatically reset when the side branches or the young branches completely enter the traction mechanism, and under the limiting of a subsequent stop block, so that the side branches or the young branches are not separated from the outer surfaces of the traction frame easily after being clamped into the traction frame, the side branches or the young branches are guaranteed to be pulled into the traction effect, the four side branches or the young branches can be clamped into the traction frame at one time, the position of the fruit tree is convenient to install, the device is convenient to install the device, and the device is high in practicality and the practical requirement, and can meet the requirements of a plurality of the requirements of people.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic top view of a first arc clamping plate and a second arc clamping plate of the branch pulling device of the present utility model;

FIG. 2 is a schematic side view of a second arc clamping plate of the branch pulling device of the present utility model;

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

FIG. 4 is an enlarged view of section IV of FIG. 2;

fig. 5 is an enlarged view of the V portion of fig. 2.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				1	First arc clamping plate	2	Second arc clamping plate
3	Adjusting clamping plate	4	Placement tank
				5	Adjusting screw rod	6	Hand wheel
7	Limiting rod	8	Screw thread post
				9	Locking piece	10	First elastic cushion
11	Slide way	12	Fixing cylinder
				13	Adjusting piece	14	Positioning groove
15	Movable rod	16	Traction frame
				17	Sliding block	18	First threaded hole
19	Second butterfly bolt	20	Second threaded hole
				21	Third butterfly bolt	22	Rotating plate
23	Third threaded hole	24	Horizontal axis
				25	Fixed support	26	Second elastic pad
27	First limiting block	28	Torsion spring
				29	Limiting clamping rod	30	Second limiting block
31	Stop block	32	Mounting base
				33	Clamping groove	101	A first edge
201	Second edge

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1-5, in an embodiment of the present utility model, a branch pulling device is provided, and the branch pulling device is used for pulling branches of fruit trees, and the branch pulling device includes a first arc-shaped clamping plate 1 and a second arc-shaped clamping plate 2.

The second arc clamping plate 2 and the two ends of the first arc clamping plate 1 are respectively and detachably connected together, specifically, the two ends of the first arc clamping plate 1 are respectively extended with a first edge 101, the first edge 101 is provided with a clamping groove 33, the two ends of the second arc clamping plate 2 are respectively extended with a second edge 201, the second edge 201 corresponds to the clamping groove 33 and faces to the side where the first edge 101 is located, a threaded column 8 is arranged, and the threaded column 8 passes through the corresponding clamping groove 33 and is locked into a locking piece 9, in the embodiment, the locking piece 9 is a butterfly nut.

Further, the outer surfaces of the first arc clamping plate 1 and the second arc clamping plate 2 are provided with slide ways 11, the slide ways 11 are provided with sliding blocks 17 in a sliding manner, in this embodiment, the number of the sliding blocks 17 is four, the outer surfaces of the sliding blocks 17 are fixedly provided with fixing supports 25, the fixing supports 25 are rotatably provided with transverse shafts 24, the outer walls of the transverse shafts 24 are fixedly provided with the fixing cylinders 12, the outer walls are provided with positioning mechanisms, movable rods 15 are slidably arranged in the fixing cylinders 12, the side walls are provided with through holes penetrating through the inside and the outside, one ends of the movable rods 15, which are located on the outer sides of the fixing cylinders 12, are provided with traction mechanisms, the outer walls are provided with a plurality of positioning grooves 14, and an adjusting piece 13 penetrates through one of the through holes and can be clamped into the corresponding positioning groove 14 when aligned with one of the positioning grooves 14, so that the movable rods 15 are fixed at the corresponding positions of the fixing cylinders 12. In this embodiment, a plurality of positioning grooves 14 are sequentially arranged on the outer wall of the movable rod 15.

Referring to fig. 1, in the present utility model, the inner surfaces of the first arc clamping plate 1 and the second arc clamping plate 2 are provided with a placing groove 4, an adjusting clamping plate 3 is disposed in the placing groove 4, the first arc clamping plate 1 and the second arc clamping plate 2 are connected with an adjusting screw 5, one end of the adjusting screw 5 extends into the placing groove 4 and is rotationally connected with the adjusting clamping plate 3, specifically, the first arc clamping plate 1 and the second arc clamping plate 2 are provided with mounting holes, the inner wall of each mounting hole is provided with internal threads, and one end of the adjusting screw 5 penetrates through the mounting holes and extends into the placing groove 4 to be rotationally connected with the adjusting clamping plate 3 in a common manner. In this embodiment, the mounting holes are symmetrically distributed, and the adjusting screw rods 5 are symmetrically distributed.

Two sliding holes are respectively formed in the outer surfaces of the first arc-shaped clamping plate 1 and the second arc-shaped clamping plate 2, a limiting rod 7 is slidably mounted in each sliding hole, one end of the limiting rod 7 is fixedly connected with the corresponding adjusting clamping plate 3, and a hand wheel 6 is fixedly mounted at one end, far away from the adjusting clamping plate 3, of the adjusting screw rod 5. In this embodiment, the two sliding holes are respectively located at two opposite sides of the mounting hole, and the two sliding holes of the first arc clamping plate 1 and the second arc clamping plate 2 are symmetrically distributed.

Referring to fig. 2 to 4, in the present utility model, the shape of the slider 17 is a T-shaped structure, the slider 17 is adapted to the slide 11, the outer surfaces of the first arc clamping plate 1 and the second arc clamping plate 2 are provided with a plurality of second threaded holes 20, the second threaded holes 20 are communicated with the inside of the slide 11, the slider 17 is provided with a first threaded hole 18, the second threaded holes 20 are in threaded connection with second butterfly bolts 19, the number of the second butterfly bolts 19 is four, the four second butterfly bolts 19 are equally divided into two groups and are respectively disposed on the second threaded holes 20 on the outer surfaces of the first arc clamping plate 1 and the second arc clamping plate 2, the second butterfly bolts 19 are adapted to the first threaded holes 18, so that the positioning effect of the slider 17 is achieved, that is, after the position of the traction mechanism is adjusted, the traction mechanism cannot move around the outer surfaces of the first arc clamping plate 1 and the second arc clamping plate 2.

Referring to fig. 2 and 5, in the present utility model, the traction mechanism includes a traction frame 16, the traction frame 16 is fixedly connected with one end of a movable rod 15, the inner sides of two ends of the traction frame 16 are fixedly provided with mounting seats 32, the mounting seats 32 are rotatably provided with a limit clamping rod 29 through a rotating shaft thereon, the inner side wall of the traction frame 16 is fixedly provided with first limit blocks 27 which are symmetrically distributed, the outer wall of the limit clamping rod 29 is fixedly provided with second limit blocks 30, the outer wall of the rotating shaft on the mounting seats 32 is sleeved with torsion springs 28, one ends of the torsion springs 28 are fixedly connected with the first limit blocks 27, the other ends of the torsion springs 28 are fixedly connected with the second limit blocks 30, and the inner side wall of the traction frame 16 is fixedly provided with limit blocks 31 which are symmetrically distributed.

Referring to fig. 4, the positioning mechanism includes a rotating plate 22, and the rotating plate 22 is fixedly sleeved on the outer wall of the transverse shaft 24, a plurality of third threaded holes 23 are formed in one side of the rotating plate 22, the fixing support 25 is in threaded connection with a third butterfly bolt 21 through the threaded holes formed in one side of the fixing support, and the third butterfly bolt 21 is in threaded connection with the third threaded holes 23, so that the positioning effect of the traction mechanism on angle adjustment is achieved. In this embodiment, the rotating plate 22 has a ring shape.

Referring to fig. 1, 2 and 5, the first elastic pad 10 is adhered to the inner surface of the adjusting clamping plate 3, the second elastic pad 26 is adhered to the inner surface of the traction frame 16, and the elastic pad has a certain flexibility, so that the trunks, side branches or young branches of the fruit trees are prevented from being broken due to the overtightening of the device clamp.

The working principle of the utility model is as follows:

referring to fig. 1 to 5, when the device is used, the butterfly nut 9 on the outer wall of the threaded column 8 is rotated firstly to enable the butterfly nut 9 to lose the limit effect on the joint of the first arc-shaped clamping plate 1 and the second arc-shaped clamping plate 2, then the threaded column 8 is moved out of the clamping groove 33 through the rotatability of the threaded column 8, the device is divided into a first arc-shaped clamping plate 1 and a second arc-shaped clamping plate 2, then the first arc-shaped clamping plate 1 and the second arc-shaped clamping plate 2 are clamped on the trunk of a fruit tree,

then the screw column 8 rotates to enter the inside of the clamping groove 33, the butterfly nut 9 is screwed down, the first arc clamping plate 1 and the second arc clamping plate 2 are firmly fixed on the trunk of the fruit tree, then the position of the traction mechanism is adjusted according to the position of the side branch or the young branch of the fruit tree, the fixed support 25 moves along with the sliding block 17 through the sliding effect of the sliding block 17 on the sliding way 11, the fixed support 25 moves through the transverse shaft 24 to drive the fixed cylinder 12 to move, the fixed cylinder 12 drives the movable rod 15 to move, the movable rod 15 drives the traction frame 16 to move, the traction mechanism can be adjusted to be in a vertical position with the side branch or the young branch, the traction mechanism can be in threaded connection with the second threaded hole 20 in the corresponding position through the second butterfly bolt 19, the second butterfly bolt 19 is screwed into the inside of the first threaded hole 18 on the sliding block 17 through the second threaded hole 20, the position of the sliding block 17 is positioned, so that the sliding block 17 is driven to slide in the slideway 11 without changing the growth direction of young branches or side branches in the subsequent use process, a good branch pulling effect cannot be achieved, the angle of the fixed cylinder 12 can be adjusted through the rotation effect of the transverse shaft 24 and the fixed support 25, the angle adjusting effect of the traction mechanism is achieved through the movable rod 15, after the angle adjusting is finished, the third butterfly bolt 21 can be screwed into the corresponding third threaded hole 23 on the rotary plate 22 by screwing the third butterfly bolt 21, the position of the transverse shaft 24 is positioned, the transverse shaft 24 and the fixed support 25 cannot rotate, the stability of the traction mechanism in adjusting to an angle is ensured,

meanwhile, in the use process of the device, the position of the traction mechanism can be stretched through the sliding relation between the movable rod 15 and the fixed cylinder 12, so that the traction mechanism can be fixed at a proper position subsequently, and can be stretched into the corresponding positioning groove 14 on the movable rod 15 through screwing the adjusting piece 13, so as to ensure the stability of the traction mechanism at the stretched position, therefore, the device can realize the stretching adjustment, the angle adjustment and the position adjustment of the traction mechanism around the outer surfaces of the first arc clamping plate 1 and the second arc clamping plate 2, adjust the traction mechanism to a proper position, then clamp the side branch or the young branch of a fruit tree into the traction frame 16 directly, and in the process of clamping the inside of the traction frame 16, the two limiting clamping rods 29 elastically overturn towards the inside of the traction frame 16 through the action of the torsion springs 28, the inside that gets into traction frame 16 completely at side branch or young branch, two spacing bars 29 can automatic re-setting, and under the spacing of follow-up dog 31, two spacing bars 29 can't outwards overturn, consequently, after side branch or young branch card go into traction frame 16 inside, side branch or young branch can not follow traction frame 16 and break away from easily, guarantee the effect of drawing branch to side branch or young branch, and can once only fix four side branches or young branch for the device, the suitability is wide, more make things convenient for people's use, the hookup location area of device and fruit tree trunk is little simultaneously, the convenience carries out the installation of a plurality of devices on a fruit tree trunk, the practicality is high, satisfy people's different needs, and each position adjustment structure on the device all possesses spacability, ensure that the device draws branch effect to the fruit tree, stability is high.

Referring to fig. 1, when in use, when the first arc clamping plate 1 and the second arc clamping plate 2 are fixed on the trunk of a fruit tree, the hand wheel 6 can be rotated to drive the adjusting screw 5 to rotate, the adjusting screw 5 is in threaded transmission with threaded holes on the first arc clamping plate 1 and the second arc clamping plate 2, and the limiting rod 7 is in sliding connection with sliding holes of the first arc clamping plate 1 and the second arc clamping plate 2, so that the position of the adjusting clamping plate 3 can be adjusted, the device is fixed on the trunks of fruit trees with different thicknesses, and the applicability of the device is further improved.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (9)

1. A branch pulling device, characterized in that the branch pulling device comprises:

a first arc splint;

the first arc clamping plate and the two ends of the second arc clamping plate are respectively and detachably connected, a slideway is arranged on the outer surface of the first arc clamping plate, a sliding block is slidably arranged on the slideway, a fixed support is fixedly arranged on the outer surface of the sliding block, a transverse shaft is rotatably arranged on the fixed support, a fixed cylinder is fixedly arranged on the outer wall of the transverse shaft, and a positioning mechanism is arranged on the outer wall of the transverse shaft; a movable rod is slidably arranged in the fixed cylinder, a through hole penetrating through the inside and the outside is formed in the side wall of the movable rod, and a plurality of positioning grooves are formed in the side wall of the movable rod; and

The traction mechanism comprises a traction frame, the traction frame is installed at one end of the movable rod, which is located at the outer side of the fixed cylinder, mounting seats are fixedly installed at two sides of the two ends, the mounting seats are rotatably provided with limiting clamping rods through rotating shafts on the mounting seats, and the adjusting piece part penetrates through the through hole and can be clamped into a corresponding positioning groove when aligned with one positioning groove.

2. The branch pulling device according to claim 1, wherein the inner surfaces of the first arc-shaped clamping plate and the second arc-shaped clamping plate are respectively provided with a placing groove, an adjusting clamping plate is arranged in the placing groove, the first arc-shaped clamping plate and the second arc-shaped clamping plate are respectively connected with an adjusting screw rod through screw threads of threaded holes formed in the outer surfaces of the first arc-shaped clamping plate and the second arc-shaped clamping plate, and one end of the adjusting screw rod extends to the inner part of the placing groove to be rotationally connected with the adjusting clamping plate.

3. The branch pulling device as defined in claim 2, wherein the first arc-shaped clamping plate and the second arc-shaped clamping plate are provided with limiting rods through symmetrically distributed sliding holes on the outer surfaces of the first arc-shaped clamping plate and the second arc-shaped clamping plate, one ends of the limiting rods are fixedly connected with the corresponding adjusting clamping plates, and a hand wheel is fixedly arranged at one end of the adjusting screw rod, which is far away from the adjusting clamping plates.

4. The branch pulling device as defined in claim 3, wherein a plurality of second threaded holes are formed in the outer surfaces of the first arc-shaped clamping plate and the second arc-shaped clamping plate, a first threaded hole is formed in the sliding block, second butterfly bolts are connected to the second threaded holes in a threaded manner, the number of the second butterfly bolts is four, and the four second butterfly bolts are respectively arranged on the second threaded holes in the outer surfaces of the first arc-shaped clamping plate and the second arc-shaped clamping plate in two groups.

5. The branch pulling device according to any one of claims 2-4, wherein first limit blocks which are symmetrically distributed are fixedly arranged on the inner side wall of the traction frame, second limit blocks are fixedly arranged on the outer wall of the limit clamping rod, torsion springs are sleeved on the outer wall of the rotating shaft on the mounting seat, and stop blocks which are symmetrically distributed are fixedly arranged on the inner side wall of the traction frame.

6. The branch pulling device according to claim 5, wherein the positioning mechanism comprises a rotating plate, the rotating plate is fixedly sleeved on the outer wall of the transverse shaft, a plurality of third threaded holes are formed in one side of the rotating plate, and the fixing support is in threaded connection with a third butterfly bolt through the threaded holes formed in one side of the fixing support.

7. The branch pulling apparatus as defined in claim 5, wherein the first elastic pad is adhered to the inner surface of the adjusting clamp plate, and the second elastic pad is adhered to the inner surface of the traction frame.

8. The branch pulling device as defined in claim 4, wherein the two ends of the first arc-shaped clamping plate are respectively extended with a first edge, a threaded column is arranged at one side of the first edge, which faces the second arc-shaped clamping plate, the two ends of the second arc-shaped clamping plate are respectively extended with a second edge, the second edge is provided with a clamping groove corresponding to the threaded column, and the threaded column penetrates through the corresponding clamping groove and is locked into the locking piece.

9. The branch pulling apparatus of claim 8, wherein the first edge and the second edge are parallel to each other.