JP3093187U - Pneumatic pruning shears - Google Patents

Abstract

(57) [Summary] (Modified) [Problem] To adjust the rotation of a compressor engine by using compressed air discharged from a safety valve provided in an air tank of a compressor that supplies compressed air. In particular, to provide pneumatic pruning scissors that reduce waste of fuel and noise of a compressor during standby. A lever for adjusting the rotation of an engine, a valve for releasing the compressed air when the pressure of the compressed air stored in an air tank reaches a predetermined pressure, and a valve for releasing the stored compressed air; A switching means for switching between supply and non-supply of air to the cylinder 52; and when the supply of the compressed air is not supplied by the switching means and the compressed air is released from the valve, the compressed air to be discharged is released. Rotation adjusting means for receiving the air and moving the lever to lower the rotation of the engine.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention is an air type pruning used for pruning trees etc. powered by a pressurized fluid such as air. It is about scissors.

[0002]

[Prior art]

  To perform pruning work in an orchard, use compressed air as a power source and use scissor blades. Pneumatic pruning shears to move have come to be used. This air type pruning scissors has a handle The scissors part is attached to the tip of the cylinder, and the motion generated by the cylinder part that uses compressed air as the power source. The force is transmitted by a transmission means such as a wire, and the power is received via the wire and the scissors. The blade is configured to move. Compressed air used for such pruning scissors Supplied from the compressor. That is, the compressor spins the engine The compressed air produced by this method is stored in an air tank and the compressed air is supplied to the cylinder section. It is supposed to be paid. The engine is still running, so compressed air If it is not supplied, it will only be stored in the air tank. A safety valve is usually installed in the air tank to prevent the pressure from rising too much. When the pressure of compressed air in the cylinder reaches a predetermined pressure, compressed air is released to the outside. ing.

[0003]

[Problems to be solved by the device]

  Therefore, while the engine is rotating, the pneumatic pruning scissors are operated during standby etc. Otherwise, compressed air will not be supplied to the cylinder, so compressed air will not flow from the safety valve. Will be released. At this time, the fuel for rotating the engine is wasted Also, the noise of the compressor was a problem.

[0004]   The present invention has been made in view of the above circumstances, and its purpose is to: Release from the safety valve installed in the air tank of the compressor that supplies compressed air. Adjusting the rotation speed of the compressor engine using the compressed air that is discharged Pneumatic pruning to reduce fuel waste and compressor noise especially during standby It provides scissors.

[0005]

[Means for Solving the Problems]

  In order to achieve the above object, the device according to claim 1 utilizes the rotation of an engine. Compressor that generates compressed air and stores it in the air tank, and the stored A cylinder that receives the supply of compressed air and generates power using the compressed air as a power source The air-type pruning scissors equipped with and that operate the scissors part by receiving the power of the cylinder. And the lever for adjusting the rotation of the engine and the air tank A valve for releasing the compressed air when the pressure of the compressed air reaches a predetermined pressure. And switching the supply / non-supply of the stored compressed air to the cylinder. For switching the valve and the compressed air supply by the switching means to non-supply. When the compressed air is discharged from the Rotation adjusting means for moving the bar to lower the rotation of the engine. Is characterized by.

[0006]   According to a second aspect of the present invention, the rotation adjusting means moves the lever to move the lever forward. The compressed air is discharged when the engine is rotated at a low speed. To do.

[0007]

[Embodiment of device]

  First, an embodiment of the present invention will be described with reference to FIG. Pneumatic pruning scissors 1 grips The grip portion 1a and the cylinder are equipped with a portion 1a, a cylinder portion 1b and a compressor 4. The portion 1b is connected to a thin flexible wire 2 and a cord 3, and the grip portion The scissors part 1e held at the tip of 1a can be freely taken to the place to be pruned . The compressor 4 is a small engine compressor equipped with casters, etc. It is suitable for outdoor use and movement, and the rotation adjusting unit 50 can be mounted via the mounting plate 54. It is equipped with. The rotation adjusting unit 50 includes a safety valve 41 of the compressor 4 and an air blower. The compressed air supplied to the cylinder 52 connects the piston 53 to the piston 53. Is operated, and the compression is performed via the wire 55 and the like provided at the tip of the piston 53. The rotation adjusting lever 42 provided on the sir 4 is operated to operate the engine of the compressor 4 or the like. Adjust the rotation of. In addition, the compressor 4 sends compressed air through the air hose 5. Supply to the cylinder part 1b. The valve 6 forming the cylinder portion 1b is a cylinder -It controls the pressurization of the part 1b and is adjacent to the cylinder 1c. The hose 5 is connected. An air hose 6 is provided between the valve 6 and the cylinder 1c. a is connected, the compressed air flowing from the air hose 5 to the valve 6 is It flows into the cylinder 1c via the aforesaid 6a. Supply of valve 6 The switching is performed via the cord 3 as the switching means of the present invention provided in the grip portion 1a. It is performed in conjunction with the switch 20 operated by the lever 7. Shirin on the worker's body The shoulder strap for mounting the dart portion 1b or the strap 8 for mounting on the waist is a cylinder. The locking member 8a, which is connected to or integrally formed with the main portion 1b, serves as a seal. It is locked to the linder portion 1b. The fixed rod 9 forming the cylinder portion 1b is a wire. For supporting the yard 2, and in this embodiment, the locking member 8a is connected. It As for the wire 2 and the cord 3, the operator wears the strap 8 on the shoulder and attaches the waist. When the cylinder part 1b is mounted in the vicinity, it does not hinder the operation of the grip part 1a held in the hand. Flexibility and sufficient length when arms are extended, reducing the burden of pruning work It is something.

[0008]   Next, the grip 1a will be described with reference to FIG. 2 shows the internal structure of the grip 1a. It is sectional drawing which shows structure. The scissors portion 1e held at the tip of the main body 10 of the grip portion 1a is Rivet so that the fixed blade 11 with the blade curved in a concave shape protrudes from the tip of the main body 10. And the like, and a drive blade 12 is attached to the fixed blade 11 so that the fixed blade 11 can be opened and closed in a cross shape. It is pivotally attached at a. The blade portion of the drive blade 12 does not overlap the blade portion of the fixed blade 11 with no gap. It is curved in a convex shape to fit each other, and a stop piece 14 is tacked to the rear end portion. With stop 14 Between the recesses 10b of the main body 10, a spring 12b formed by coiling a leaf spring material is projected (see FIG. (Not shown) so that the drive blade 12 can be opened with respect to the fixed blade 11. When the drive blade 12 is closed, the spring 12b is set in the recess 10b. ing. On the rear end of the stop piece 14 and the wire 2 and the locking rod 15 connected to the wire 2. A convex portion 14a that is locked more is provided. This wire 2 is after the grip 1a It penetrates through the inside of the main body 10 from the end, and is directed through a pulley 16 provided inside the main body 10. In other words, it penetrates the wire hole 14b provided in the stopper 14 and becomes the locking rod 15 on the convex portion 14a. More locked. When the wire 2 is driven by pressurizing the cylinder portion 1b, the driving blade 1 2, the fixed blade 11 and the blade portion of the drive blade 12 open and close. The wire hole 14b is Even if the drive blade 12 moves, the wire 2 remains straight between the pulley 16 and the locking rod 15. Chi from the locking rod 15 to the pulley 16 so that the edge of the wire hole 14b does not rub It has a shape that widens in the direction (the hatched portion shown in the stopper 14 in FIG. 2). However, The opening width at the time of opening and closing will be described later in detail, but is locked by the convex portion 14a and the locking rod 15. Not only the locking portion 13b provided on the positioning lever 13 and the locking portion provided on the stopper 14. 14c and.

[0009]   The rear end of the main body 10 is made of rubber, resin, or the like in a shape that can be easily gripped by the operator's hand. The top 18 is inserted. The positioning lever 13 has a substantially Y shape. Although the details will be described later at the intersection of the three sides, the spindle 10c provided on the main body is used as the center of rotation. A state in which the lever portion 13a is supported by the main body 10 and the lever portion 13a is held on one side by the grip 18. It is projected outside the main body 10 so that it can be operated in the state. Drive blade 12 on the other side A member for locking the drive blade 12 by receiving the locking portion 14c provided on the stopper 14 in the state where the lever is opened. A stopper 13b and a stopper provided on the stopper 14 on the other side with the drive blade 12 closed. A locking portion 13c for receiving the stop portion 14c and locking the drive blade 12 is provided. Drive blade Details of the relationship between 12 and the positioning lever 13 will be described later.

[0010]   Here, a supporting form of the positioning lever 13 will be described with reference to FIG. Figure 6 FIG. 4 is a schematic cross-sectional view of a positioning lever 13 support portion. The spindle part 10c is formed by the main body 10. It is a two-stage cylindrical boss that is formed, and the shaft hole of the positioning lever 13 is the upper boss. It is rotatably engaged. Further, a screw hole penetrates through the center of the boss, and the screw 13 e is screwed into the screw hole via the spring 13d, and the spring tightening amount is adjusted to adjust the spring 13 Adjusting the pressing force on the positioning lever 13 by d, the positioning lever 13 and the lower boss Adjust the frictional force with the upper surface and rotate the positioning lever 13 with a predetermined torque. It is designed to be adjustable. In other words, the lever portion 13a can be operated and The engaging portion 14c of the stop piece 14 tacked to the moving blade 12 is received by the engaging portions 13b and 13c. At this time, the positioning lever 13 can surely lock the drive blade 12.

[0011]   Returning to FIG. 2 again, the safety lever 19 has an L shape, and the grip 1 8 is supported by the main body 10 in the vicinity of the end portion of one side by the support shaft 19a, and the lever of the other side is The outside of the main body 10 can be operated so that the grip portion 18 can be operated with the grip 18 held by the hand. It is projected to the part. In addition, a portion that is supported by the support shaft 19a and forms an L-shaped corner of one side A spring 19c is engaged between the protrusion 19d in the vicinity and the main body 10, and Biasing 19 is made to project outside the main body 10. The switching lever 7 is L-shaped The support shaft 7a has a shape that has an L-shaped corner in front of the grip 18. Is supported by the main body 10 and the lever portion 7c on one side is grasped by the grip 18 with a hand. It is projected outside the main body 10 so that it can be operated in the state. In addition, screw on the spindle 7a The recoil spring 7d is hooked, one end is hooked on the lever portion 7c and the other end is hooked on the main body 10. The lever portion 7c acts on the lever portion 7c in a direction projecting to the outside of the main body 10. Also, On the body 10 side of the lever portion 7c, the protrusion 7b forms a corner of the safety lever 19 in an L shape. The safety lever 19 is provided so as to be locked near the minute, and the safety lever 19 is operated. The switching lever 7 can be operated by removing the L-shaped angled part from the projection 7b. It is supposed to be. When the switching lever 7 is operable, the switching lever The other side of 7 becomes swingable inside the main body 10, and when the switching lever 7 is operated, The lever 20a of the switch 20 provided inside the main body 10 and connected to the cord 3 Is operated to switch ON / OFF. In this way, the safety lever 19 is provided As a result, the switch lever 7 is mistakenly operated to turn on the switch 20 and the drive blade 12 There is no need to operate it. Although not shown, each lever 7, 13, 19 is a book. The body 10 is provided with a standing wall portion so that it can be operated within a predetermined operation range.

[0012]   The wire 2 and the cord 3 are tubular wires made of resin or the like that can move freely. The wire covers 2a and 3a penetrate through the inside, and the wire covers 2a and 3a are gripping parts. The wire 2 and the cord 3 between 1a and the cylinder part 1b should not be exposed. Covered. This wire 2 can move within the wire cover 2a without obstruction. Wear. A rubber bush 1 for locking the wire covers 2a and 3a at the rear end of the grip portion 1a. A hole 10a into which 7 and the like are press-fitted is provided so as to penetrate the grip 18.

[0013]   Next, the cylinder portion 1b will be described with reference to FIG. Figure 3 shows the cylinder It is sectional drawing which shows the inside of the cylinder 1c which comprises 1b. On the top of the cylinder 1c Has a fixed rod 9 projectingly formed, and the upper end of the fixed rod 9 is provided with a fastening means 23a. A sealing crown 23 is attached. The tip of the wire cover 2a of the wire 2 Are inserted into the sealing crown 23 by the fastening means 23a and fixed therein. The tip of the wire 2 protruding from the wire cover 2a below the fixed part Is movably arranged in the fixed rod 9 and interlocks with the piston 21 (as a piston shaft). (Functioning as a function) is connected to the upper end of the interlocking rod 22. And is connected to wire 2 The locking rod 25 is inserted into the hole 22a at the upper end of the interlocking rod 22 so that the wire 2 moves vertically. A penetrating locking plug 25a is connected by sealing the upper end of the interlocking rod 22.

[0014]   Inside the cylinder 1c, a piston that reciprocates in the vertical direction of the cylinder 1c. The ton 21 is shielded by the O-ring 21a inserted in the groove provided around the side surface. It is arranged with airtightness between the inner wall of the linder 1c. The interlocking rod 22 is The piston 21 is penetrated in the vertical direction by the collar portion 22b provided at the lower end of the piston. 21 to engage. A coiled spring 24 is provided in the hole 22c at the lower end of the interlocking rod 22. Is inserted. The spring 24 has an upper end that is provided inside the interlocking rod 22 near the upper end. The lower end is brought into contact with the bottom surface of the cylinder 1c by being locked by the stopper 22d. It is supported by penetrating a spring column 26 that engages with the bottom surface of c. The spring 24 is the above With the above configuration, the piston 21 is moved to the upper end in the cylinder 1c through the interlocking rod 22. Energize to position it near. Further, the interlocking rod 22 and the cylinder 1c contact each other. The O-ring 27 is inserted into the groove provided on the cylinder 1c side in the cylinder chamber. The airtightness of 1d is improved, and the piston 21 is vertically arranged on the bottom surface of the cylinder 1c. An air vent hole 28 is provided to facilitate sliding.

[0015]   Next, the valve 6 will be described with reference to FIG. FIG. 4 shows the block structure of the valve 6. It is a diagram. The valve control means 30 is connected to the cord 3 and is connected to the switch 20 described above. The valve mechanism 31 is controlled by the ON / OFF state of. In addition, the switch 20 A battery (not shown) is provided to detect ON / OFF and control the valve mechanism 31. I am. Normally, the valve control means 30 has a valve mechanism 31 when the switch 20 is OFF. The air hose 6a and the exhaust port 32 are connected inside, and the compression supplied from the air hose 5 Seal the air. Alternatively, a safety device (not shown) will release the pressure. I am sorry. On the other hand, when the switch 20 is ON, compressed air is supplied from the air hose 5 to the air Supply to the source 6a.

[0016]   Next, referring to FIG. 7, the compressor 4 and the rotation as the rotation adjusting means of the present invention will be described. The adjusting unit 50 will be described. FIG. 7 shows an outline of the compressor 4 and the rotation adjusting unit 50. It is a schematic block diagram. The compressor 4 includes an air compressor that includes an engine. The rotation adjusting lever 42 (lever for adjusting the rotation of the engine) provided in the portion 43. The rotation of the engine becomes high on the left side of the figure due to the rocking of The rotation adjustment lever 42 is rotated by a spring 44. It is biased to the right side of the figure, that is, the high rotation side. Raw with this air compression unit 43 The generated compressed air is stored in the air tank 45, and the air hose 5 and the valve 6 It is supplied to the cylinder 1c via.

[0017]   Further, the air tank 45 is equipped with a safety valve 41 (valve). The pressure of the compressed air in 45 is, for example, a pressure-resistant specified pressure (predetermined pressure) in consideration of safety. When it reaches (force), it releases compressed air. This specified pressure is air It is the pressure for safe use of the tank 45, and it is usually used when compressed air is supplied. The setting is higher than the pressure in the air tank 45. The released compressed air is It is supplied to the rotation adjusting unit 50 through the air hose 51.

[0018]   Here, the rotation adjusting unit 50 will be described with reference to FIG. FIG. 8 (a) is the front It is a schematic sectional drawing, and the same figure (b) is a side view. Compressor 4 and mounting plate 54 The cylinder 52 is attached by a screw (not shown) through the A piston 53 including a shaft 53a and a shaft 53b is provided on the left side of the cylinder 52. The compressed air supplied from the air hose 51 through the compressed air hole 52a To the right, the spring hole 53 opened in the shaft portion 53b from the right end of the head portion 53a. c is inserted from the left side of the spring hole 53a and is locked by a locking member 56 described later. It is reciprocated leftward by being urged by a spring 59 supported by a column 60 installed on the attachment plate 54. Exercise. The shaft portion 53b projects from the left surface of the cylinder 52 and is attached to the tip of the shaft portion 53b. The wire 55 is locked by the locking member 56, and the wire 55 is a rotation adjusting lever. Stroke that penetrates the upper end of 42 and is linked to the end of wire 55 in conjunction with piston 53 The upper 57 swings the rotation adjusting lever 42 via a spring 58. It Also, on the right side inside the cylinder 52, there are four grooves 52b on the left side of the cylinder 52. A hole 52c is formed in the portion, and four holes 54a are formed in the mounting plate 54 as air holes. However, the number of each of these air holes is not limited to the number described above. .

[0019]   Next, the operation of the scissors portion 1e and the operation of the rotation adjusting portion 50 will be described with reference to FIGS. explain. FIG. 5 shows only the components necessary for explaining the operation of the scissors portion 1e, and FIG. Shows a sectional view for explaining the operation of the rotation adjusting unit 50. The drive blade 12 is shown in FIG. ), The stopper 14c and the locking portion 14c of the positioning lever 13 And 13b are locked and held in a normal standby state (intermediate opening width). At this time, Since the switch 20 is in the OFF state, the compressed air supplied from the compressor 4 The pressure in the air tank 45 is increased by being sealed by the valve 6, and the safety valve 41 compresses the compressed air. Air is supplied to the cylinder 52 and the piston 53 is shown in FIG. 9 (a) by compressed air. And the rotation adjusting lever 42 slides through the spring 58 accordingly. The engine of the air compression unit 43 is rotated to the right by the topper 57, and the rotation speed of the engine becomes low. this At this time, the head portion 53a of the piston 53 reaches the groove portion 52b provided in the cylinder 52. Then, the compressed air passes through the groove 52b and is discharged from the hole 54a provided in the mounting plate 54. . Therefore, the head portion 53a does not move to the right any more, and the bias by the spring 59 and the compression space are reduced. Due to the pressure of the air, the left and right movements are repeated and stay in the vicinity. Rotation adjustment Since the bar 42 has a spring 58, the left and right movements of the piston 53 are absorbed by the spring 58. The rotation adjusting lever 42 is held in a state of being tilted to the right for storing. Also, the above Since the compressed air can be discharged from the hole 54a as described above, the rotation adjusting unit 50 Since it has a function as a conventional safety valve for discharging, the air tank 45 There is no need to install a conventional safety valve in.

[0020]   In such a standby state, first, hold the safety lever 19 and operate the switching lever 7. When the switch lever 7 is gripped after the ready state, the switch 20 is turned on and The compressed air supplied from the air hose 5 is activated by operating the lube mechanism 31. It is sent to a and supplied to the cylinder 1c. At this time, the air hose 6a and the exhaust port 32 The connection route of is cut off. Therefore, the pressure in the air tank 45 is below the specified pressure. Therefore, the safety valve 41 is closed and the pressure in the cylinder 52 becomes atmospheric pressure, and the piston 53 It is biased by the spring 59 and moves leftward as shown in FIG. The air is discharged and the hole 54a is sucked, and the rotation adjusting lever 42 is moved by the spring 44 accordingly. The engine of the air compression unit 43 is rotated to the left and the engine rotates at high speed. Connected to valve 6 The air hose 6a is connected to the upper surface of the cylinder 1c, and the compressed air is transferred through the cylinder. It is supplied to the cylinder chamber 1d above the piston 21 in the cylinder 1c. The internal pressure of d increases and the piston 21 is pushed down. Piston 21 is Shirin When the wire 2 is moved downward from the upper end of the dar 1c, the wire 2 is pulled toward the cylinder 1c. The drive blade 12 and the fixed blade 11 of the scissors portion 1e are closed in association with this. The closed state is shown in FIG. Also, the drive blade 12 is closed as described above. In the process of rotating, as shown in FIG. 3 and the positioning lever 13 is rotated clockwise so that the positioning lever Since the locking portion 13c of the bar 13 is disengaged from the rotation track of the locking portion 14c of the stopper 14, In the state shown in FIG. 5C, the locking portion 14c is locked by the locking portion 13c. There is no.

[0021]   When the switching lever 7 is released, the switch 20 is turned off and the valve 6 Stops the supply of compressed air to the cylinder 1c, and the compressed air is discharged from the cylinder chamber 1d. When the air is discharged and the pressure in the cylinder chamber 1d drops, the piston is moved by the spring 24. 21 is pushed up to near the upper end of the cylinder chamber 1d, and the wire 2 is interlocked with this. Is pushed back to the side of the grip 1a and driven by the spring 12b with the fixed blade 11 of the scissors 1e. The blade 12 is again in the open state shown in FIG. At this time, the compressed air flows through the valve 6 Since it is sealed with, the rotation adjusting unit 50 is in the state shown in FIG. Again this At this time, the positioning lever 13 is rotated clockwise as shown in FIG. The locking portion 13b of the positioning lever 13 is a stopper. 14 is in the rotation path of the locking portion 14c of the locking member 14 and the locking portion 14c of the stopper 14 is positioned by the positioning lever. The drive blade 12 is locked by the locking portion 13b of the bar 13 and is in the state shown in FIG. 5 (a). Of.

[0022]   Further, when in the closed state shown in FIG. When it is rotated clockwise, the locking portion 13c is placed on the rotation track of the locking portion 14c of the stopper 14. When the switching lever 7 is released, the locking portion 14c is locked by the locking portion 13c, and The moving blade 12 is held in a closed state as shown in FIG. Since it is sealed, the rotation adjusting unit 50 is in the state shown in FIG. Further here Then, when the positioning lever 13 is rotated clockwise, the locking portion 13c is locked. Although it is disengaged from c and rotated clockwise by being urged by a spring 12b not shown, Since the deciding lever 13 is rotated clockwise, the positioning lever 13 is engaged. The stopper 13b is in the rotation track of the locking portion 14c of the stopper 14, and the stopper 1 of the stopper 14 4c is locked to the locking portion 13b of the positioning lever 13, and the drive blade 12 is shown in FIG. The state becomes as shown in.

[0023]   In the state shown in FIG. 5 (a), rotate the positioning lever 13 counterclockwise. When rotated, the locking portion 13b is disengaged from the locking portion 14c, and the spring 12b (not shown) It is biased and rotated clockwise and locked by the locking rod 15, and the drive blade 12 is opened by the blade. Changes to a large standby state (predetermined opening width). The state is shown in FIG. When the switching lever 7 is gripped in the same manner, the rotation adjusting section 50 is shown in FIG. 9 (b). The scissors portion 1e is closed as shown in FIG. 5 (c), and the switching lever 7 is released. When released, it returns to the state shown in FIG. 5 (a) again, and the rotation adjusting unit 50 is in the state shown in FIG. 9 (a). It becomes a state.

[0024]   Further, when the safety device is in the closed state shown in FIG. If the safety device operates so that, for example, the air hose 6a and the exhaust port 32 are When connecting and sealing the compressed air supplied from the air hose 5, the rotation adjusting unit 5 0 is in the state shown in FIG. 9 (a), and the safety device has a safety valve, for example, and is compressed. When air is discharged to the outside, the rotation adjusting unit 50 is in the state shown in FIG. 9 (b). .

[0025]   As described above, the pneumatic pruning scissors 1 of the present invention are provided with the compressor 4 depending on the usage condition. The engine rotation can be adjusted.

[0026]

[Effect of device]

  From the safety valve installed in the air tank of the compressor that supplies compressed air Adjustment that adjusts the rotation of the compressor engine by using the discharged compressed air By providing a means to reduce the engine speed of the compressor during standby To provide pneumatic pruning shears that reduce fuel waste and compressor noise. And are possible.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment according to the present invention.

FIG. 2 is a sectional view of a grip portion 1a shown in FIG.

3 is a sectional view of a cylinder portion 1b shown in FIG.

4 is a block diagram showing a configuration of a valve 6 shown in FIG.

FIG. 5 is an explanatory diagram for explaining an opening state of the blade according to the embodiment of the present invention.

FIG. 6 is a schematic sectional view of a support portion of the positioning lever of the present embodiment.

FIG. 7 is a compressor 4 and a rotation adjusting unit 5 shown in FIG.
It is a schematic block diagram of 0.

FIG. 8 is a cross-sectional view of the rotation adjusting unit 50 shown in FIGS. 1 and 7.

FIG. 9 is an explanatory diagram illustrating a state of the rotation adjusting unit 50 according to the embodiment of the present invention.

[Explanation of symbols]

1 Air type pruning shears 1a gripping part 1b Cylinder part 1c cylinder 1e Scissors 2 wires 3 codes 4 compressor 5 Air hose 6 valves 6a air hose 7 Switch lever 8 straps 9 fixed rod 10 body 11 fixed blade 12 Drive blade 13 Positioning lever 14 stop 15 locking rod 16 pulley 17 Rubber bush 18 grip 19 Safety lever 20 switches 21 pistons 30 valve control means 31 valve mechanism 32 exhaust port 41 Safety valve 42 Rotation adjustment lever 43 Air compressor 44 spring 45 air tank 50 Rotation adjustment unit 51 air hose 52 cylinders 53 pistons 54 Mounting plate 55 wire 56 Locking member 57 Stopper 58, 59 spring 60 props

Claims (2)

[Scope of utility model registration request] 1. A compressor for generating compressed air by utilizing the rotation of an engine and storing the compressed air in an air tank, and a cylinder for receiving the supply of the stored compressed air and generating power by using the compressed air as a power source. In the pneumatic pruning scissors that operates the scissors part by receiving the power of the cylinder, the lever for adjusting the rotation of the engine, and the pressure of the compressed air stored in the air tank has reached a predetermined pressure. Sometimes, a valve for releasing the compressed air, a switching means for switching the supply and non-supply of the stored compressed air to the cylinder, and the supply of the compressed air is not supplied by the switching means. When the compressed air is discharged from the valve, it receives the discharged compressed air and moves the lever to rotate the engine at a low speed. Pneumatic pruning shears, characterized in that it comprises a means. 2. The pneumatic pruning scissors according to claim 1, wherein the rotation adjusting means releases the compressed air when the rotation of the engine is reduced to a low rotation by moving the lever.