JP4597758B2 - 畦 coating machine - Google Patents

Description

  The present invention relates to a cocoon coater that forms a new rice cake by repairing an old rice cake that partitions a paddy field.

  Such a hull coater is attached to the rear part of a traveling machine body such as a tractor, is driven by power from the traveling machine body, and forms a new bag on the old bag while moving along the old bag. . This padding machine mainly includes a pre-processing unit that cuts the inside of the old paddle and deposits the earth, and a padding unit that applies the soil piled up by the pre-processing unit onto the cut old paddle. .

  In such a paddy coater, when weeds grow on the upper surface of the old paddle or the upper surface of the old paddle is hard, an attempt to form a new paddle on the old paddle Since the boundary between the lantern and the Shinkan is easy to separate and the Shinkan is likely to collapse after formation, a heaven processing section that cuts off the upper surface (the heaven) of the old lantern is provided in the forward direction of the preprocessing section. As a result, a wrinkle coater has been developed that forms a new wrinkle on the top surface of an old iron that has been subjected to a field treatment (see Patent Document 1).

  As shown in FIG. 6 (front view), the coater 100 described in Patent Document 1 includes a pre-processing unit 101 (rotation center shaft 101a arranged in the direction in which the old kite K extends and supported rotatably. A celestial processing unit 103 (a cutting rotor in the literature) having a rotation center shaft 103a extending in substantially the same direction as the rotation center shaft 101a of the preprocessing unit 101 is disposed on the front side of the rotation rotor. The celestial processing unit 103 is pivotally attached to the distal end portion of a transmission frame 105 (gear case in the literature) that can swing in the vertical direction with the rotation center axis of the preprocessing unit 101 as a rotation fulcrum. The power from the pre-processing unit 101 is transmitted via a power transmission mechanism built in the motor, so that the motor rotates. The transmission frame 105 adjusts the vertical position of the celestial processing unit 103 and absorbs the force acting on the celestial processing unit 103 so that the cultivating claws (cutting pawls in the literature) and ridges of the celestial processing unit 103 are used. A vertical position adjusting mechanism 110 that prevents damage to the entire coating machine is connected.

  The vertical position adjusting mechanism 110 is provided with a support block 111 rotatably on a cover member 102 that covers the preprocessing unit 101, and an adjustment rod 112 is slidably inserted in the vertical direction in the support block 111. A plurality of adjustment holes 112a are provided in the upper portion with a predetermined interval in the axial direction, the adjustment collar 113 is inserted, and the adjustment pin 114 is inserted into either the adjustment collar 113 or the reversal adjustment hole 112a. The lower part of the rod 112 is connected to the transmission frame 105, a spring adjustment collar 115 is attached to the lower part of the adjustment rod 112, and a compression spring 116 is interposed between the spring adjustment collar 115 and the fulcrum block 112.

  The vertical position adjusting mechanism 110 configured in this way can cause the transmission frame 105 to swing in the vertical direction about the rotation center shaft 101a (the rotor shaft in the literature) of the preprocessing unit 101 as a rotation fulcrum. When an impact force is applied to the tilling claw 103b of the portion 103, the compression spring 116 is contracted through the transmission frame 105 to absorb the impact force.

Japanese Examined Patent Publication No. 4-64643

  In the vertical position adjusting mechanism described in Patent Document 1, when an old iron having a different height is painted, the transmission frame is inclined in the vertical direction and the extension amount of the compression spring is changed. For this reason, especially when painting an old fence with a high height, the compression spring will be in a more compressed state and the buffering function will be reduced. Need to be adjusted. The adjustment position of the spring adjustment collar is performed by pulling out the pin inserted through the spring adjustment collar and the adjustment rod, moving the spring adjustment collar to a desired position, and fixing the spring adjustment collar to the adjustment rod with the pin. When the spring adjustment collar is moved to a desired position and fixed with a pin, it is necessary to hold the spring adjustment collar in the desired position while compressing the compression spring, which is troublesome for the operator.

  In the present invention, there is a need for a lacquering machine that can easily adjust the vertical position adjusting mechanism and does not bother an operator when lacquering an old casket having different heights. An object is to provide a coating machine.

In order to achieve the above-described object, the plastering machine of the present invention is mounted on a traveling machine body, arranged at a position offset laterally with respect to the traveling position of the traveling machine body, and a celestial process that cuts off the heaven field of the old fence. Part, a pre-processing part that cuts the old culvert and deposits the soil, and a glazing machine that has a working part that has a trimming part that is applied to the crushed old slag. The vertical position adjustment device is supported by a vertical position adjustment device provided with a body, and is provided with a buffer mechanism that receives a force acting on the celestial processing unit with a certain elastic force of the elastic body so as to be rotatable in the vertical direction. includes a first support member and a second support member which is telescopically adjustable in length with respect to the first support member, the second support member, a plurality with a predetermined interval in the axial direction The length adjustment hole is provided, and communicates with the length adjustment hole on the distal end side of the first support member. An insertion hole through which a pin is inserted is provided, the other end of the first support member is inserted into a fulcrum member attached to the working portion, and a protrusion and a fulcrum member provided at an intermediate portion in the axial direction of the first support member The shock absorber mechanism is configured to have an elastic body inserted into the first support member between the first support member and the vertical position adjustment device from the fully contracted state in which the second support member is contracted relative to the first support member. The second support member can be expanded and contracted to the fully extended state with respect to the support member. When the vertical position adjusting device is fully extended, the first support member is rotated downward to move the heaven processing unit downward. When the vertical position adjustment device is in the fully contracted state, the first support member rotates upward and extends in a substantially horizontal direction to move the heaven processing unit to an upper position .

According to this invention, the celestial field processing unit is supported by the vertical position adjusting device provided with an elastic body, and the vertical position adjusting device receives the force acting on the celestial processing unit with a certain elastic force of the elastic body. A first support member that includes a buffer mechanism and is supported so as to be pivotable in the vertical direction; and a second support member that is length-adjustable with respect to the first support member. Is provided with a plurality of length adjustment holes with a predetermined interval in the axial direction, an insertion hole capable of communicating with the length adjustment hole on the distal end side of the first support member, and the other end of the first support member Is inserted into a fulcrum member attached to the working part, and has an elastic body inserted into the first support member between the protrusion and the fulcrum member provided at the axially intermediate part of the first support member. constitute a buffer mechanism, the vertical position adjusting device, whether all collapsed state in which the second support member relative to the first support member by reducing The second support member can be expanded and contracted to the fully extended state with respect to the first support member. When the vertical position adjusting device is in the fully extended state, the first support member is rotated downward to move the heaven processing unit downward. When the vertical position adjustment device is fully contracted, the first support member rotates upward and extends in a substantially horizontal direction to move the celestial processing unit to the upper position, so that the old irons having different heights are moved. In the case of glazing, the length of the second support member with respect to the first support portion is adjusted according to the height of the old ridge, and the connecting pin is inserted into the length adjustment hole and the insertion hole to attach the second support member. It fixes to a 1st support part and a heaven processing part is moved on the old heaven's heaven. In other words, the vertical position adjustment device for the coater of the present invention does not require adjustment of the buffer function of the elastic body, and only needs to adjust the length of the second support member. Therefore, the adjustment of the vertical position adjustment mechanism is easy and does not bother the operator.

According to the wrinkle coater according to the present invention, the celestial processing unit is supported by the vertical position adjusting device provided with the elastic body, and the vertical position adjusting device applies the force acting on the celestial processing unit to the constant of the elastic body. A first support member that is supported by the elastic force of the first support member so as to be rotatable in the vertical direction, and a second support member that is length-adjustable with respect to the first support member. The second support member has a plurality of length adjustment holes with a predetermined interval in the axial direction, and an insertion hole that can communicate with the length adjustment hole is provided on the distal end side of the first support member. The other end of the member is inserted into a fulcrum member attached to the working unit, and the elastic body is inserted into the first support member between the projection and the fulcrum member provided at the axially intermediate portion of the first support member. constitute the cushioning mechanism comprises a vertical position adjusting apparatus was reduced relative to the first support member and the second support member all The second support member can be expanded and contracted from the small state to the first support member, and when the vertical position adjusting device is in the fully extended state, the first support member is rotated downward and the heaven processing unit. When the vertical position adjustment device is fully contracted, the first support member rotates upward and extends in a substantially horizontal direction to move the celestial processing unit to an upper position. In the case of painting an old kite, it is possible to provide a kitting machine that can easily adjust the vertical position adjusting mechanism and does not bother the operator.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a glazing machine according to the present invention will be described below with reference to FIGS. The present embodiment will be described by taking as an example a scissor machine that performs a smearing operation in accordance with the forward traveling of the traveling machine body. For convenience of explanation, the following description will be made with the directions of arrows shown in FIG. 1 (plan view) as the front-rear direction and the left-right direction.

  As shown in FIG. 1 and FIG. 2 (front view), the wrinkle coater 1 is connected to a three-point link connecting mechanism (not shown) provided at the rear portion of the traveling machine body 90 so that the traveling machine body 90 moves forward. Proceed according to. The wrinkle coater 1 is mounted on the traveling machine body 90 and left and right from the mounting part 10 by a mounting part 10 having an input shaft 15a to which power from the traveling machine body 90 is input and a turning cylinder 11 provided on the mounting part 10. An offset mechanism 20 that is movable in the direction, and a rotation center axis of a rotation drive shaft 21 that extends in the vertical direction on the moving end side (rear end side) of the offset mechanism 20 is disposed so as to be rotatable in the horizontal direction. And a working unit 30 that performs an offset work with the power transmitted from the input shaft 15a.

  The mounting portion 10 includes a hitch frame 12 that extends in the left-right direction, and a connection frame (not shown) that is attached to the front side of the hitch frame 12 and can be connected to the three-point link connection mechanism of the traveling machine body 90. A gear box 15 is provided in the lower center of the hitch frame 12 in the left-right direction, and the aforementioned input shaft 15 a is provided in the gear box 15. The input shaft 15a is configured to transmit power from a PTO shaft (not shown) of the traveling machine body 90 via a transmission shaft (not shown).

  The offset mechanism 20 is rotatably connected to the hitch frame 12 on the front end side and extends rearward, and is arranged along the right side of the offset frame 22 so that the front end side is on the right end of the hitch frame 12. It has the link member 23 connected so that rotation was possible. The rear end side of the link member 23 is rotatably attached to a connecting arm member 25 connected to a connecting member 24 provided rotatably at the rear end portion of the offset frame 22. The offset mechanism 20 forms a parallel link mechanism by the offset frame 22, the link member 23, the hitch frame 12, and the connecting arm member 25.

  The offset frame 22 is provided on the rear end side of the offset frame 22 via a built-in power transmission mechanism (not shown), and rotationally drives a driven shaft (not shown) extending in a substantially vertical direction. Under the driven shaft, the above-described rotational drive shaft 21 serving as the rotation center axis of the working unit 30 is connected coaxially with the driven shaft.

  A rotation shaft case (not shown) is provided outside the rotation drive shaft 21 to cover it. An upper end portion of the rotary shaft case is rotatably connected to a lower portion of the rear end of the offset frame 22 and is attached in a state where the working unit 30 is fixed to a lower end portion of the rotary shaft case. Further, the above-described connecting member 24 that is rotatable with respect to the rotating shaft case is provided on the rotating shaft case. That is, the connecting member 24 is in a non-coupled state with the rotary shaft case and the rotary drive shaft 21 and is rotatable about the rotary drive shaft 21 as a rotation center. The connecting arm member 25 is connected to the connecting member 24 and extends in the lateral direction.

  The working unit 30 can be rotated about the rotation fulcrum O by the connection mechanism 40 connected between the connection arm member 25 and the rotary shaft case, and the offset mechanism 20 can be swung by the connection mechanism 40. On the other hand, the working direction axis O2 indicating the working direction of the working unit 30 is held so as to be parallel to the traveling direction B of the traveling machine body 90. Here, the connecting mechanism 40 includes a connecting member 24 and an expansion / contraction cylinder (not shown), and the expansion / contraction cylinder is pivotally connected between the distal end portion of the connection arm member 25 and the upper portion of the rotating shaft case. ing. For this reason, when the telescopic cylinder expands and contracts, the working unit 30 rotates about the rotation fulcrum O via the connecting arm member 25 as the rotation center.

  Further, when the expansion / contraction operation of the expansion / contraction cylinder is restricted in a state in which the operation direction axis O2 of the operation unit 30 extends in parallel in the front-rear direction, the connection mechanism 40 integrates the operation unit 30 and the connection member 24. Therefore, when the offset mechanism 20 is swung in the left-right direction in a state where the working unit 30 and the connecting member 24 are integrated, the working unit 30 connects the connecting arm member 25 of the offset mechanism 20 constituting the parallel link mechanism. The working direction axis O2 of the working unit 30 moves while being maintained parallel to the front-rear direction via the connecting member 24 connected to the head.

  The working unit 30 configured to be rotatable in this manner is configured by arranging the celestial processing unit 50, the preprocessing unit 60, and the trimming unit 70 from the front side. The Tenba processing unit 50 cuts the upper part (Tenba) of the old paddle formed along the periphery of the paddy field, the pre-processing unit 60 performs the filling of the cut soil, and the trimming unit 70 cuts the piled soil. It has the function of painting on the broken old wall.

  The straightening section 70 is a polyhedral drum 73 attached to a rotation center shaft 71 that extends in the left-right direction and is rotatably supported, and a cylindrical section 75 attached to the right end of the polyhedral drum 73 and extending in the lateral direction. It has. The trimming unit 70 is connected to and supported by a rotary shaft case via a trimming power transmission case 77, and the power from the rotary drive shaft 21 via a trimming power transmission mechanism (not shown) in the trimming power transmission case 77. Is transmitted to the trimming unit 70.

  The preprocessing unit 60 includes a preprocessing rotor 61 that is rotatable. The pretreatment rotor 61 is connected to and supported by a rotary shaft case via a pretreatment power transmission case (not shown), and the rotary drive shaft 21 via a pretreatment side power transmission mechanism built in the pretreatment power transmission case. Is transmitted to the preprocessing unit 60.

  The celestial processing unit 50 includes a celestial processing rotor 51 that is rotatable. The celestial processing rotor 51 is configured by attaching a plurality of celestial processing claws 54 to a rotation center shaft 53. The heaven processing rotor 51 is supported by the preprocessing rotor 61 via the heaven power transmission frame 52. The celestial power transmission frame 52 is disposed between the celestial processing rotor 51 and the preprocessing rotor 61, and its base end portion is freely rotatable in the vertical direction at the distal end portion of the rotation center shaft 62 of the preprocessing rotor 61. And is supported so that the vertical position can be adjusted via a vertical position adjusting device 80 fixed to the rotating shaft case. For this reason, the celestial processing rotor 51 can be rotated in the vertical direction with the rotation center shaft 62 as the rotation center.

  The heaven processing unit 50 is configured such that power from the rotary drive shaft 21 is transmitted to the celestial processing unit 50 via a heaven side power transmission mechanism provided in the heaven power transmission frame 52.

  As shown in FIG. 3 (side view), the vertical position adjusting device 80 includes a first support member including a buffer mechanism 81 that includes a compression spring 81a and receives a force acting on the celestial processing rotor 51 with a certain elastic force. 82 and a second support member 84 whose length is adjusted with respect to the first support member 82. The first support member 82 and the second support member 84 are rod-like members, and the second support member 84 is inserted into the front end side of the first support member 82 so as to be extendable and contractible. The upper end portion of the first support member 82 is rotatably connected to the support member 31 shown in FIG. 2 attached to the working portion 30, and the lower end portion of the second support member 84 is connected to the end portion of the heavenly power transmission frame 52. It is pivotally connected.

  As shown in FIG. 4A (side view), the first support member 82 is a cylindrical rod-like member, and is provided with an insertion hole 82a through which the connecting pin 86 is inserted at the distal end, and is pulled out at the proximal end. An extraction / removal restricting hole 82b through which the stop pin 87 is inserted is provided, and an annular protrusion 82c that abuts one end of the compression spring 81a is provided at the intermediate portion. The first support member 82 is inserted into the fulcrum member 32 that is pivotally attached to the support member 31 described above, and the first support member 82 is moved to the distal end side by a retaining pin 87 that is inserted into the removal restriction hole 82b. Withdrawal is regulated. A compression spring 81 a is inserted into the first support member 82 between the protrusion 82 c and the fulcrum member 32. The compression spring 81a is inserted in a state compressed from a natural length to a predetermined length, and urges the fulcrum member 32 with a certain elastic force. That is, the first support member 82 is supported so as to be movable with respect to the fulcrum member 32, and relaxes the force acting in the axial direction of the first support member 82 by the compression spring 81a. In addition, the part which consists of the compression spring 81a and the fulcrum member 32 is hereafter described as the buffer mechanism 81. FIG.

  Therefore, when a force G is applied to the first support member 82 to move it toward the fulcrum member 32, the fulcrum of the first support member 82 is less than the elastic force F of the compression spring 81a. When the movement to the member side is stopped and the force G becomes larger than the elastic force F, the first support member 82 moves to the fulcrum member side against the elastic force F of the compression spring 81a, and the elastic force of the compression spring 81a. When F reaches the same magnitude as the force G, the movement of the first support member 82 toward the fulcrum member side stops. Therefore, the force G acting on the first support member 82 is absorbed by the compression deformation of the compression spring 81a, and the impact force acting in the axial direction of the first support member 82 can be reduced.

  The second support member 84 has an outer diameter that is slidable in a through hole 82 d that penetrates in the axial direction of the first support member 82, and is disposed at a predetermined interval in the axial direction of the second support member 84. A plurality of length adjusting holes 84a extending in a direction orthogonal to the axial direction are provided. The length adjusting hole 84a communicates with the insertion hole 82a so that the connecting pin 86 can be inserted therethrough. For this reason, as shown in FIG. 4B (side view), any one of the plurality of length adjustment holes 84a communicates with the insertion hole 82a, and the connection pin 86 is inserted into these communication holes. The length of the second support member 84 extending from the first support member 82 can be set to a desired length, and the second support member 84 can be fixed to the first support member 82. 4B shows a case where the vertical position adjusting device 80 is in a fully contracted state, and FIG. 4A shows a case where the vertical position adjusting device 80 is in a fully extended state. Further, the cross-sectional shapes of the first support member 82 and the second support member 84 are not limited to a circular shape, and may be formed in a rectangular shape. In this case, the cross-sectional shape of the through hole 82d is similar to the cross-sectional shape of the second support member 84. Further, as the second support member, a stepless adjustment may be made using a rotary screw type, an electric or hydraulic cylinder, or the like.

  The above-described fulcrum member 32 that rotatably supports the proximal end side of the first support member 82 is formed in a columnar shape as shown in FIGS. 5A (bottom view) and (b) (side view). The support main body 33 and the disk-shaped sliding portions 34 projecting on both sides of the support main body 33 are provided. The support main body portion 33 has a pair of flat surface portions 33a and 33b arranged to face each other with the central axis as the center. An insertion hole 33c is provided between the flat portions 33a and 33b so that the first support member 82 is slidably inserted therethrough. The flat portion 33a on the one side abuts against a retaining pin 87 inserted into the first support member 82 and regulates the removal of the first support member 82 toward the distal end side. The other flat portion 33b functions as a spring seat that comes into contact with one end of the compression spring 81a. The sliding portion 34 is rotatably fitted in a support hole 31a formed in the support member 31.

  Next, the operation of the hull coater 1 will be described using a case where one side of the paddy field is hulled as an example. As shown in FIGS. 1 and 2, first, the traveling machine body 90 is arranged along one side Sa of the paddy field S. Then, the telescopic cylinder of the coupling mechanism 40 is expanded and contracted so that the working direction axis O2 of the working unit 30 is parallel to the traveling direction (arrow B direction) of the traveling machine body 90, and the telescopic operation of the telescopic cylinder is restricted. . As a result, the working unit 30 is integrated with the connecting member 24 and the rotating shaft case. When the offset mechanism 20 that forms the parallel link mechanism is swung to the right side, the working unit 30 is held on the right side where the working unit 30 can be applied with a dashing work by the forward traveling of the traveling machine body 90 while the working direction of the working unit 30 is held parallel to the front-rear direction. Move to the offset work position.

  Then, the traveling machine body 90 is caused to travel forward and the working unit 30 is driven. When the working unit 30 is driven while moving forward, the heaven field processing unit 50 cuts the upper part (the heaven) of the old paddle K on one side Sa of the paddy field S, and the preprocessing unit 60 fills the cut soil. The paddle portion 70 is applied to the old paddle K cut from the piled soil, and one side Sa of the paddy field S is continuously padded.

  Here, the celestial processing unit 50 is supported by the vertical position adjustment device 80 so as to be rotatable in the vertical direction, and the buffer mechanism 81 reduces the impact force acting in the axial direction of the first support member 82. When the celestial processing claw 54 comes into contact with a large stone or the like and the rotational movement of the celestial processing rotor 51 is to be restricted, the celestial processing rotor 51 moves upward to allow the rotational movement of the celestial processing rotor 51. At the same time, the compression spring 81 a of the buffer mechanism 81 absorbs part or all of the impact force that has acted on the celestial processing claw 54. For this reason, it is possible to prevent the discoloration operation from being interrupted, and to prevent damage to the heaven-processed claw 54 and the entire discoloration machine 1.

  Since the vertical position adjustment device 80 can be adjusted in length, as shown in FIG. 3, when the old heel K having a high height is painted, the second support member 84 for the first support member 82 is used. By adjusting the projecting length of, the heaven processing unit 50 can be moved onto the heaven of the old fence K having a high height. Further, in the vertical position adjusting device 80, the buffering function of the compression spring 81a is constant regardless of the rotational position of the first support member 82. That is, the elastic force that receives the force acting in the axial direction of the first support member 82 is always constant. For this reason, the vertical position adjusting device 80 of the coater 1 of the present invention does not require adjustment of the compression spring 81a of the buffer mechanism 81 when the old kite having different heights is coated, and the second support member Only the length adjustment of 84 may be performed. For this reason, the adjustment work of the vertical position adjusting mechanism 80 is easy and does not bother the operator.

  In the above-described embodiment, the vertical position adjustment device 80 is configured to include the first support member 82 and the second support member 84. However, the vertical position adjustment device 80 includes three or more members. It may be configured.

  In the above-described embodiment, the heaven field processing unit 50 and the preprocessing unit 60 are arranged such that the extending directions of the rotation center axes 53 and 62 of the heaven field processing unit 50 and the preprocessing unit 60 intersect with those of the rectifying unit 70. Although arranged, the celestial processing unit 50 and the preprocessing unit 60 are arranged so that the extending directions of the rotation center axes 53 and 62 of the celestial processing unit 50 and the preprocessing unit 60 are substantially parallel to those of the rectifying unit 70. May be. Thus, even when the celestial processing unit 50 and the preprocessing unit 60 are arranged, the vertical position adjusting device 80 of the above-described embodiment can exert the same effect.

1 is a plan view of a wrinkle coater according to an embodiment of the present invention. The front view of this glazing machine is shown. The side view of the up-and-down position adjustment device of a glazing machine is shown. The vertical position adjusting device is shown. FIG. 10A shows the vertical position adjusting device in the fully extended state, and FIG. 10B shows the vertical position adjusting device in the fully contracted state. The fulcrum member which supports an up-and-down position adjustment apparatus is shown, The figure (a) is a bottom view of a fulcrum member, The figure (b) is a side view of a fulcrum member. The front view of the working part of the conventional glazing machine is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spider coater 50 Top field processing part 60 Pre-processing part 70 Adjusting part 80 Vertical position adjustment device 81 Buffer mechanism 81a Compression spring 82 First support member 84 Second support member 90 Traveling machine body K Old iron

Claims (1)

A pre-processing unit that is mounted on a traveling machine body and is arranged at a position offset laterally with respect to the traveling position of the traveling machine body, cuts off the old fence's heaven, In a scissor coater having a working part having a trimming part for painting the piled up soil on the cut old scissors,
The heaven processing unit is supported by a vertical position adjustment device provided with an elastic body,
The vertical position adjusting device includes a first support member that is supported to be rotatable in the vertical direction and includes a buffer mechanism that receives a force acting on the celestial processing unit with a certain elastic force of the elastic body. A second support member that is length-adjustable with respect to the one support member;
The second support member is provided with a plurality of length adjustment holes with a predetermined interval in the axial direction,
An insertion hole is provided on the distal end side of the first support member so as to communicate with the length adjustment hole and through which a connecting pin is inserted, and the other end portion of the first support member is attached to the fulcrum member attached to the working portion. The shock absorbing mechanism is configured to have the elastic body inserted into the first support member between the protrusion and the fulcrum member that is inserted and provided in the axially intermediate portion of the first support member ,
The vertical position adjusting device is extendable from a fully reduced state in which the second support member is reduced with respect to the first support member to a fully extended state in which the second support member is extended with respect to the first support member. And when the vertical position adjusting device is fully extended, the first support member is rotated downward to move the heaven processing unit downward, and when the vertical position adjusting device is fully contracted, the first support member is provided. Rotating upward and extending in a substantially horizontal direction to move the celestial processing unit to an upper position .

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