JP2009273438A - Tea leaf plucker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tea leaf plucker of a tear leaf harvester running along a tea ridge and plucking tea leaves which blows up plucked tea leaves to a transport duct by pressurized air and carrying them to a tea leaf receiver, and being easy to replace a cutting blade. <P>SOLUTION: A plucking device A includes a cutting blade unit case 20 having a clipper type cutting blade 29 at a lower part and pressure air blow-in ducts 14 and 15, wherein a cutting blade guide plate 30 supporting the blade is inserted into a groove 32 of a cutting blade guide-receiving plate 31. Main blow-up holes 23 and 24 are provided at the upper part of a rear wall 25 of the cutting blade unit case 20 and supplementary blow-in holes 21 and 22 are set in the lower part, to blow up a pressurized air from the main blow-up holes 23 and 24 to a transport duct 38, besides an inclined wall 27 is provided from the rear wall 25 to the front rim of the cutting blade guide plate 30 to form a wind pressure receiver 28 so as to cover the supplementary blow-in holes 21 and 22 and pressurized air is blown up from a space at the lower end of the inclined wall 27. Further, louver holes 37 are formed in the inclined wall 27 to blow up pressurized air. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is a traveling-type tea leaf picking machine in which tea leaves are picked up while traveling along a teacup and the picked tea leaves are transported from the picking device to the tea leaf storage device. The present invention relates to a tea leaf picking device that is blown up and transported.

In a traveling tea leaf plucking machine, Patent Literature 1 discloses that a plucked tea leaf is blown up and transported into a transport duct connecting a plucking device and a tea leaf storage device. Patent Document 2 has been disclosed as a form in which the outlet of pressure air in Patent Document 1 is brought close to a cutting blade. In the above two examples, since the distance from the outlet of the pressurized air to the transport duct is long, the force of the pressurized air becomes weak and the tea leaves are clogged and cheap in the transport duct.
Then, like patent document 3, the invention which made the blowing port of a pressure wind approach the transport duct was disclosed.
JP 2004-154021 A JP 2006-50963 A JP 2007-28925 A JP 2008-35706 A Japanese Patent Application No. 2007-011753

  The total length of the cutting blade is about 1.8 m according to the width of the blade, and when the pressure air outlet is just after the cutting blade as in Patent Documents 1 and 2, the horizontal width of the outlet is about 1 which is the same as the cutting blade. .8m is required. The pressure air blown out with a width of about 1.8 m is squeezed to a width of about 1 m of the transport duct by the cover on the left and right of the cutting blade unit case, and blown up toward the transport duct. The pressure wind is considerably weakened in the transport duct due to the throttle of the pressure wind and the separation of the transport duct from the outlet of the pressure wind. For this reason, it is difficult to transport a large amount of tea leaves, and leaf clogging occurs when the picking speed is increased. In order to make the pressure wind strong enough even in the transport duct, a powerful blower fan is required.

  Moreover, when the pressure wind outlet is close to the transport duct as in Patent Document 3, the pressure wind in the transport duct becomes strong, but it is far from the cutting blade, and the force for sucking the picked tea leaves becomes weak. In this case as well, in order to compensate for this, the blower fan must be made strong.

  In order to solve the above-mentioned defects, the applicant has filed an application in Japanese Patent Application Laid-Open No. 2004-151561 in which the outlet for the pressure air is provided immediately after the cutting blade and at two locations near the transport duct. On the other hand, the method of providing the pressure air outlet immediately after the cutting blade has been improved as in Patent Document 4, but a sufficient effect has not been obtained.

  Therefore, the applicant solved the problem by repeating research based on Patent Document 5. According to the first aspect of the present invention, the bottom plate of the cutting blade unit case, which includes a cutting blade guide plate and a cutting blade guide receiving plate, is used as a base, and the rear wall of the cutting blade unit case, the rear portion of the cutting blade, and the rear wall are connected. A space with a triangular cross-section composed of slope walls is provided over the entire width of the cutting blade as a wind pressure reservoir, and the wind pressure reservoir and the blower fan are placed along the back of the transport duct that is raised above the cutting blade unit case. A means of connecting with a blowing duct that blows down is used.

  According to a second aspect of the present invention, in the first aspect of the present invention, the louver hole is provided in the slope wall and the pressure air is blown upward from the louver hole.

  The invention of claim 3 is the pressure according to claim 1, wherein a gap is provided between the lower end of the slope wall and the cutting blade guide plate, a rising wall slightly higher than the gap is provided in front of the gap behind the cutting blade, and the pressure blows forward from the gap. Use a means of changing the direction of the wind and blowing up.

  According to a fourth aspect of the present invention, in the first, second, and third aspects, a means is provided in which a main blow-up port that blows up the pressure air directly toward the transport duct is provided on the rear wall of the cutting blade unit case. .

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, means for separating the blower fan connected to the wind pressure reservoir and the blower fan connected to the main blow-up port is used.

  The invention according to claim 6 is the invention according to claim 4, wherein the pressure air blown down along the back surface of the transport duct is branched, one side is reversed, the air is blown upward and connected to the main air outlet, and the other is blown as it is. Use the means of lowering and connecting to the wind pressure reservoir.

  The invention according to claim 7 is characterized in that the tea leaves, which are provided on the rear wall of the cutting blade unit case and carried by the pressure air blown from the two main blow-up ports, are carried by one transport duct connected to the tea leaf storage device. The tea leaf plucking device according to claim 1, 2, 3, 4, 5, 6.

  The invention of claim 8 has a configuration in which the cutting blade guide receiving plate is composed of two upper and lower portions, a gap is provided between the upper plate and the lower plate, and the cutting blade guide plate is inserted into the gap, The means for making the cutting blade guide plate detachable by pulling it out is used.

  According to a ninth aspect of the present invention, in the third aspect of the present invention, in the third aspect, the tops are provided over the entire length of the cutting blade at regular intervals according to the gap between the lower end of the slope wall and the cutting blade guide plate and the gap between the front end of the slope wall and the rising wall. Is used.

  According to the first aspect of the present invention, a space having a triangular cross section is provided over the entire length of the cutting blade as a wind pressure reservoir, and a pressure air blowing duct is connected to the space, so that the wind pressure is uniform over the entire length of the cutting blade. Thus, the pressure wind of the same strength can be blown out at any position of the cutting blade.

  According to the second aspect of the present invention, the picked tea leaves can be gently conveyed to the main blowing outlet by the pressure air blowing upward from the louver hole of the slope wall. In particular, tea leaves wet with rain can be prevented from sticking to the slope wall. Moreover, by opening the direction of a large number of louver holes, the pressure air can be prevented from flowing in the lateral direction, and the blowing direction can be aligned.

  In the invention of claim 3, the strength of the pressure wind can be easily adjusted by adjusting the gap between the lower end of the slope wall and the cutting blade guide plate and the gap between the rising wall in front thereof. Further, since it is not necessary to seal the joint between the lower end of the slope wall and the cutting blade guide plate, the work of wind pressure accumulation is facilitated.

  In the invention of claim 4, the pressure wind blown up from the main blow-up port becomes the main driving force for carrying the tea leaf to the tea leaf storage device via the transport duct. In this way, the pressure wind blown up from the wind pressure reservoir need only be a force to carry the picked tea leaves to the main blow-up opening. Moreover, since the pressure wind blown from the main blow-up port sucks the air near the cutting blade, it helps the pressure wind blown from the wind pressure reservoir.

  According to the fifth aspect of the present invention, a fan that generates high pressure is connected to the wind pressure reservoir, strong pressure air is blown out from a narrow gap, and a fan with a large air volume is connected to the main air outlet to transport a large amount of tea leaves. The effect can be improved by using a fan that matches the characteristics of both fans.

  In the invention of claim 6, by making the fan connected to the wind pressure reservoir and the fan connected to the main blow-up port the same, the air duct can be simplified, the number of fans can be reduced, and the production cost can be reduced.

  In the seventh aspect of the present invention, by using one transport duct, the size of the duct increases, transport resistance decreases, and clogging of tea leaves can be prevented in the transport duct. Moreover, the production cost can be reduced by using one transport duct.

  In the invention of claim 8, the replacement and repair of the cutting blade can be facilitated.

  It is very difficult to align a gap of several millimeters from which the pressure wind blows over the entire cutting blade. In the invention of claim 9, by providing the top, the gap is made constant, the strength of the pressure wind is made uniform, and at the same time, the flow direction is rectified upward to prevent sideways flow.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view of a traveling tea leaf plucking machine, and FIG. 2 is a side view, in which crawler-type traveling devices 1 and 2 provided at the left and right according to a teacup T are fixed to a gate frame 3 And the frame of the body which a worker rides and works, and the run part are constituted.
A plucking device A that can be moved up and down in accordance with the height of the teacup is provided at the front portion at the approximate center of the machine body. Two fans 5 and 6 are provided at the front of the machine body, and the flexible hoses 7 and 8 are connected to the air ducts 10 and 11 on the back of the transport duct 38 to send the pressure air to the plucking device A. The tea leaves picked up by the picking device A are blown up in the transport duct 38 by the pressure air and sent to the tea leaf containing device 39 at the rear of the machine body.

FIG. 3 shows a sectional view of the plucking device A, and FIG. 4 shows the relationship between the plucking device A, the transport duct 38, and the blower ducts 10 and 11, as viewed from the back.
The plucking device A includes a cutting blade unit case 20 and a pressure air blowing ducts 14 and 15 each having a clipper-type cutting blade 29 provided at the lower part. The cutting blade 29 has a structure in which upper and lower blades having a flat arch shape when viewed from the front are held by the cutting blade guide plate 30 so as to follow the shape of the upper side of the teacup T, and move alternately to pluck tea leaves. It has become.
The cutting blade drive unit 40 is provided at the central portion of the cutting blade, but may be at the left and right ends. The cutting blade guide plate 30 is inserted into a groove 32 provided in a cutting blade guide plate receiving plate 31 constituting the bottom of the cutting blade unit case 20 and fixed to the cutting blade unit case 20 with left and right bolts 33.

  The cutting blade unit case 20 surrounds the cutting blade 29 with a rear wall 25, a front wall 26, and left and right walls. The left and right walls have lower ends that are substantially the same width as the entire length of the cutting blade 29, are tapered upwardly, and are connected to the upper transport duct 38. The lower portion of the front wall 26 is opened from the cutting blade 29 to an appropriate height in order to receive tea leaves. The rear wall 25 has main blow-up ports 23 and 24 in the upper portion, auxiliary blow-in ports 21 and 22 in the lower portion, and pressure air blow-in ducts 14 and 15 in the back. The upper portions of the pressure air blowing ducts 14 and 15 are connected to the air blowing ducts 10 and 11 for the pressure air blowing down along the back surface of the transport duct 38.

The central portions of the pressure air blowing ducts 14 and 15 are partitioned by partition walls 16 and 17, respectively. The partition walls 16 and 17 are inverted to be U-shaped and connected to the lower edges of the main blowing ports 23 and 24. Blow-up guide plates 18 and 19 are provided on the upper edge.
A slope wall 27 is provided from the bottom of the main blowing ports 23, 24 of the rear wall 25 toward the front edge of the cutting blade guide plate 30, and the rear wall 25, the cutting blade guide plate 30 and the cutting blade guide receiving plate are provided. The wind pressure pool 28 is formed in a space having a triangular cross-section surrounded by the bottom plate of the cutting blade unit case 20, which is constituted by 31.

  In Example 1, the lower end of the slope wall 27 has a gap of the dimension x. A rising wall 36 is provided in front of the slope wall 27 with a gap of dimension y so that the pressure air blown from the wind pressure reservoir 28 is blown upward. The pressure air blown from the gap 35 formed by x and y must have the same strength at any place on the left and right of the cutting blade. Therefore, the gap 35 must be the same size. For this reason, in the embodiment, as shown in FIGS. 5 and 6, the tops 34 are provided at regular intervals over the entire length of the cutting blade. The top 34 is thinned so as not to obstruct the pressure wind blowing up. The dimensions x and y of the top 34 vary depending on the relationship between the capabilities of the fans 5 and 6 and the main blow-out ports 23 and 24. In the embodiment, x = 6 mm and y = 8 mm.

  As Example 2, the case where the louver hole 37 is provided in the slope wall 27 in FIG. 7 is shown. In this embodiment, the louver holes 37 are formed in three stages from the lower side of the slope wall 27, and the lateral direction is distributed over the entire length of the cutting blade (see FIG. 8). The direction of the wind passing through the louver hole opened in the thin plate is determined by the opening direction. The louver hole 37 is opened so that the pressure wind blown from the wind pressure reservoir 28 is blown upward. FIG. 9 shows details of the louver hole 37. In the embodiment, the size of one louver hole 37 is a = 25 mm, b = 8 mm, and c = 3 mm. When the louver hole 37 is provided in the slope wall 27, the lower end of the slope wall 27 and the cutting blade guide plate 30 are in contact with each other so that the compressed air does not escape forward. However, a slight gap 35 may be provided, and the louver hole 37 and the pressure air blowing from the gap 35 may be used in combination. In that case, the rising wall 36 is required. In this case, the pressure wind blown from the gap 35 may be weak.

As Example 3, FIGS. 11, 12, and 13 show a case where the fans connected to the main blowing ports 23 and 24 and the wind pressure reservoir 28 are separately provided. Reference numeral 4 denotes an additional fan dedicated to supplying the wind pressure reservoir 28. The flexible hose 9 is connected to the blower duct 12 and the branch duct 13 is connected to the left and right pressurized air blowing ducts 14 and 15. The pressure air blowing ducts 14 and 15 are separated by partition walls 16 and 17. The air ducts 10 and 11 are connected to the main air outlets 23 and 24, and the branch duct 13 is connected to the auxiliary air outlets 21 and 22.
Providing the guide plate 41 on the extension line of the branch duct 13 is effective in inducing the pressure air blown down from the branch duct 13.

Next, the operation of the tea leaf plucking device will be described.
The traveling devices 1 and 2 are traveled across the teacup T, the height of the plucking device A is moved up and down by a driving device (not shown), and the clipper-type cutting blade 29 is made to cut the tea leaves on the surface of the teacup T. Match the size. Next, the fans 5 and 6 and the cutting blade 29 are driven, and the airframe is slowly run to perform the plucking operation. The pressure air generated by the fans 5 and 6 passes through the flexible hoses 7 and 8 and is sent to the pressure air blowing ducts 14 and 15 through the air blowing ducts 11 and 12. Since the insides of the pressure air blowing ducts 14 and 15 are divided by the partition walls 16 and 17, one is guided to the blowing guide plates 18 and 19 and the partition walls 16 and 17, and from the main blowing ports 23 and 24. Blows up into the cutting blade unit case 20. The other is sent from the auxiliary inlets 21 and 22 to the wind pressure reservoir 28.

  The pressurized air that has entered the wind pressure reservoir 28 is temporarily stored in the wind pressure reservoir 28 and blown up into the cutting blade unit case 20 from the lower end of the slope wall 27 or the louver hole 37. Since the wind pressure reservoir 28 is a space provided over the entire length of the cutting blade 29, it is possible to emit pressure wind of the same strength anywhere on the cutting blade 29. The pressure air blown from the main blow-up ports 23 and 24 sucks air in the vicinity of the cutting blade due to the ejector effect. The plucked tea leaves are carried to the main blowing ports 23 and 24 by the suction wind, the pressure wind blown from the lower end of the slope wall 27, and the pressure wind blown from the louver hole 37. It is sent to the tea leaf storage device 39 through the transport duct 38 by the pressure air blown up from.

  Next, a procedure for attaching and detaching the cutting blade 29 will be described. FIG. 10 shows a case where the cutting blade 29 is removed. The cutting blade 29 must always be replaced for blade grinding or repair. In addition, whether the tea leaves to be harvested are soft sprouts, hard leaves, hard branches, etc., it is necessary to always replace them with a cutting blade suitable for the purpose. The cutting blade guide plate 30 is inserted into the groove 32 of the cutting blade guide receiving plate 31 and fixed to the cutting blade unit case 20 with bolts 33 at both ends. If the bolt 33 is removed, the cutting blade 29 can be easily detached from the cutting blade unit case 20 while being attached to the cutting blade guide plate 30.

  Next, referring to FIGS. 11, 12, and 13, the operation when the fan is divided for the main blowing ports 23 and 24 and the wind pressure reservoir 28 will be described. In the third embodiment, the dedicated fan 4 is set on the rotation shafts of the fans 5 and 6. The pressure wind generated by the dedicated fan 4 passes through the flexible hose 9 and is divided into left and right by the air duct 12 and the branch duct 13, and is connected to the wind pressure pool 28 side of the pressure wind blowing ducts 14, 15. It blows up from the clearance 35 or the louver hole 37 at the lower end. The pressure air generated by the fans 5 and 6 is connected to the main air outlets 23 and 24 of the pressure air blowing ducts 14 and 15. In the embodiment of FIG. 3, the pressure air of the blower fans 5 and 6 is connected to both the main air outlets 23 and 24 side and the wind pressure reservoir 28 side, so that the air volume and the wind pressure cannot be set independently.

  The main air outlets 23 and 24 carry a large amount of tea leaves in the transport duct 38 to the tea leaf storage device 39, and therefore require a large air volume fan. The wind pressure reservoir 28 side blows out strong pressure air from a narrow gap, so the amount of air may be small, but a fan with high air pressure is required. Since the dedicated fan 4 is dedicated to the wind pressure reservoir 28 side and is independent, a fan suitable for this purpose can be selected. Fans 5 and 6 on the main blowing ports 23 and 24 side can also be selected in accordance with the purpose.

Front view of a traveling tea leaf plucking machine equipped with a plucking device of the present invention Side view of a traveling tea leaf plucking machine equipped with the plucking device of the present invention Sectional view of the plucking device of the present invention View of plucking device from the rear Sectional view around the cutting blade showing the top 34 The figure which shows the position of the top 34 Sectional view of louver hole 37 The figure which shows arrangement | positioning of the louver hole 37 Detailed view of louver hole 37 (plane, front, cross section) Explanatory drawing of attachment / detachment of the cutting blade 29 Front view of Example 3 with divided blower fans The rear view which shows the ventilation duct of Example 3 The side view which shows the ventilation duct of Example 3.

Explanation of symbols

A ... plucking device, T ... teacup,
DESCRIPTION OF SYMBOLS 1, 2 Traveling apparatus 3 Gate form frame 4 Dedicated fan 5, 6 Fan 7, 8 Flexible hose 9, Flexible hose 10, 11 Air duct 12 Air duct 13 Branch duct 14, 15 Pressure air blowing duct 16, 17 Partition wall 18, 19 Blowing guide plate 20 Cutting blade unit cases 21 and 22 Auxiliary blowing ports 23 and 24 Main blowing port 25 Rear wall 26 Front wall 27 Slope wall 28 Wind pressure pool 29 Cutting blade 30 Cutting blade guide plate 31 Cutting blade guide receiving plate 32 Groove 33 Bolt 34 Top 35 Clearance 36 Rising wall 37 Louver hole 38 Transport duct 39 Tea leaf storage device 40 Cutting blade drive part 41 Guide plate

Claims (9)

  A cross-sectional triangle composed of a cutting blade unit case bottom plate and a blade wall of the cutting blade unit case, and a slope wall connecting the rear portion of the cutting blade and the rear wall. The air pressure reservoir and the blower fan are connected by a blower duct that blows down along the back of the transport duct that rises above the blade unit case. Tea leaf plucking device characterized by that.   2. The tea leaf plucking device according to claim 1, wherein a louver hole is provided in the slope wall, and the pressure air is blown upward from the louver hole.   In claim 1, a gap is provided between the lower end of the slope wall and the cutting blade guide plate, a rising wall slightly higher than the gap is provided in front of the gap behind the cutting blade, and the direction of the pressure air blown forward from the gap is changed to Tea leaf plucking device, characterized by being blown up.   4. The tea leaf plucking device according to claim 1, wherein a main blow-up port for blowing up the pressure air directly toward the transport duct is provided on the rear wall of the cutting blade unit case.   5. A tea leaf plucking apparatus according to claim 4, wherein the blower fan connected to the wind pressure reservoir and the blower fan connected to the main blowing port are separated.   In claim 4, the pressure wind blown down along the back of the transport duct is branched, one side is reversed, the top is blown upward and connected to the main blow-up port, and the other is blown down and connected to the wind pressure reservoir. Tea leaf plucking device characterized by that.   The tea leaves, which are provided on the rear wall of the cutting blade unit case and carried by the pressure air blown from the two main blow-up ports, are carried by one transport duct connected to the tea leaf storage device. 3, 4, 5, 6 tea leaf plucking device.   The cutting blade guide receiving plate is composed of two upper and lower plates, and a gap is provided between the upper plate and the lower plate so that the cutting blade guide plate is sandwiched, and the cutting blade guide plate is inserted into or pulled out from this gap. A tea leaf plucking device characterized in that the blade guide plate is detachable.   4. The tea leaf plucking apparatus according to claim 3, wherein the tops of the cutting blade are provided at regular intervals along the gap between the lower end of the slope wall and the cutting blade guide plate and the gap between the front end of the slope wall and the rising wall.

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