JP2011167162A - Tine fixing structure of raking reel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To plan to improve durability of tines and reduce trouble in changing the tine. <P>SOLUTION: In a tine fixing structure of tines of a raking reel, the upper flange 70 of a channel member 42B is attached below along a tine support bar body 42A and a large number of tines 45 are fixed to be parallel to a web 71 of the channel member 42B with a space in the longitudinal direction. The tines 45 are constituted by installing an attached unit 80A on the upper end, a hanging rod-shaped unit 81 on the lower end and a spiral shaped coil spring unit 80B around a lateral shaft center adjacent to the attached unit 80A. Each of the tines 45 is fixed with an individual screw member 73 in a state in which the shaft center j of the screw member 73 for fixing the attached unit 80A to the web 71 of the channel member 42B locates at a position within the range of heights between the highest portion 80Ba and the lowest portion 80Bb of the coil spring unit 80B. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  In the present invention, an upper flange of a channel member to which a tine can be attached is attached below a tine support bar main body provided across the left and right reel frames, and is attached to the web of the channel member in the longitudinal direction. The present invention relates to a tine mounting structure of a take-up reel in which a large number of tines are mounted in parallel at intervals.

Conventionally, as a tine mounting structure of this kind of scraping reel, the upper end portion of the tine is sandwiched between a channel member fixed to the tine support bar body and a small channel member having a smaller height than the channel member. Some of them are fixed with screws (for example, see Patent Document 1).
The tine to be attached is provided with an attached portion to be attached to the channel member by a screw member at the upper end portion, a hanging rod-like portion at the lower end portion side, and due to a scratch reaction force accompanying the rotational driving of the take-up reel. A helical coil spring portion is provided adjacent to the attached portion around a horizontal axis that can absorb bending displacement of the hanging rod-like portion by elastic deformation, and the attached portion is formed by the channel member. And the small channel member, and are attached so as to be sandwiched between the screw members.
Further, the tine is attached so that the coil spring portion is in contact with the lower surface of the lower flange of the small channel member, and the coil spring portion and the attached portion located above the coil spring portion are connected via a connecting rod-like portion. Are integrally formed.
The channel member and the small channel member are formed in a long shape, and a plurality of the tines are clamped and fixed at once by the pair of the channel members.
On the other hand, a plurality of slits are formed in the lower flange of the channel member, and the tine swings around the member axis of the screw member by inserting the hanging rod-like portion of the tine into the slit. Is prevented.
Further, the tine head composed of the attached portion, the connecting rod-like portion, and the coil spring portion has a margin in the groove between the upper flange and the lower flange of the channel member with a space between the upper and lower sides. And all of them are fitted in the groove.

Japanese Utility Model Publication No. 64-439 (FIGS. 1 and 4)

According to the tine mounting structure of the conventional take-up reel described above, if a displacement occurs in the drooping bar-like portion on the tine distal end side due to the take-up reaction force accompanying the rotational drive of the take-up reel, a large bending moment is generated on the proximal end side. Works.
This bending stress acts on the connecting rod-shaped portion together with the coil spring portion. However, the connecting rod-shaped portion is located on the base end side from the coil spring portion, and is different from the helical structure of the coil spring portion in a linear shape. Therefore, the stress concentration of the bending force is likely to occur in the connecting rod-like portion.
Therefore, there is a possibility that the connecting rod-shaped portion is plastically deformed or fatigued by repeated loads.
Also, if plastic deformation or fatigue failure occurs in the tine, only the corresponding tine will be replaced. However, even if one tine is replaced, it is necessary to remove the small channel member. Other tines that have been used also have a problem in that it is necessary to remove the screw member, and it takes time to replace parts.

  Accordingly, an object of the present invention is to provide a tine mounting structure for a take-up reel that can solve the above-mentioned problems, improve the durability of the tine, and reduce the time for replacing the tine.

  In the first characteristic configuration of the present invention, an upper flange of a channel member to which a tine can be attached is attached below a tine support bar main body provided across the left and right reel frames. A tine mounting structure of a take-up reel in which a plurality of tines are mounted in parallel on a web at intervals in the longitudinal direction, wherein the tine has an upper end portion to be attached to the channel member by a screw member A hanging rod-shaped portion on the lower end side, and a helix around the horizontal axis that can absorb the bending displacement of the hanging rod-shaped portion due to the reaction force caused by the rotation of the scraping reel by elastic deformation. A coil spring portion having a shape is provided adjacent to the attached portion, and each of the tines is a screw member that fixes the attached portion to the web of the channel member. Material axis is in a state located in the height range of the spiral highest portion and the spiral lowest portion of the coil spring portion is in place is attached a separate screw member.

According to the first characteristic configuration of the present invention, the tine is configured such that the attached portion is provided at the upper end portion, the hanging rod-like portion is provided on the lower end side, and the coil spring portion is provided adjacent to the attached portion. And each tine has a member shaft core of a screw member for fixing the attached portion to the web of the channel member in a state where it is located within a height range of the highest spiral portion and the lowest spiral portion of the coil spring portion. Since it is fixed to the web of the channel member, the conventional connecting rod-like portion can be omitted, and the displacement acting on the tip of the tine can be absorbed mainly by the elastic deformation of the coil spring portion. become.
Accordingly, plastic deformation and fatigue failure of the tine can be made difficult to occur, and the durability of the tine can be improved.
In addition, since each tine is attached to the channel member with an individual screw member, each tine can be individually attached and detached when replacing the parts.
Accordingly, it is possible to reduce the time required for exchanging tines.

  According to a second characteristic configuration of the present invention, the tine has a state in which the hanging rod-like portion is inserted into a slit formed in the lower flange of the channel member, and the tine includes the attached portion and the coil spring portion. The highest part of the head is attached to be close to the lower surface of the upper flange of the channel member.

According to the second characteristic configuration of the present invention, the attached portion is attached to the web of the channel member with the hanging rod-like portion of the tine inserted through the slit formed in the lower flange of the channel member. Movement of the drooping bar in the direction is constrained by the slit edges. Therefore, the tine can be prevented from swinging around the member axis of the screw member of the attached portion.
Furthermore, since the highest portion of the tine head provided with the attached portion and the coil spring portion is attached in a state close to the lower surface of the upper flange of the channel member, along with the rotation of the take-in reel, When a pushing force acts on the tine, the highest portion of the tine head can be supported by the upper flange of the channel member.
Therefore, it is possible to reduce the burden on the fixing screw member of the attached portion due to the action of the pushing force, and even if the screw member is loose and the fixing force is reduced, the pushing force is increased by the upper flange of the channel member. It is possible to prevent the tine from being inadvertently removed.

  According to a third characteristic configuration of the present invention, in the tine, the member shaft core of the screw member that fixes the attached portion is at the same or substantially the same height as the inner peripheral surface of the spiral highest portion of the coil spring portion. And the height of the tine head is the same or substantially the same as the vertical flange interval dimension of the channel member. It is in the place set to.

According to the third characteristic configuration of the present invention, in the tine, the member shaft core of the screw member for fixing the attached portion has the same or substantially the same height as the inner peripheral surface in the highest spiral portion of the coil spring portion. Therefore, the coil head can be formed into a simple shape in which the attached portion is formed on the spiral extension of the coil spring portion, and the cost of processing of the tine can be reduced.
In addition, since the attached portion is formed so as to be the highest portion of the tine head, the push-up force with respect to the tine can be transmitted to the upper flange of the channel member by the attached portion. Therefore, it is possible to counter the push-up by both the supporting force by the upper flange and the fixing force by the fixing screw member of the attached portion, and it is possible to maintain a more stable fixed state. Furthermore, since the coil spring portion is adjacent to the attached portion, the thrust force acting from the hanging rod-like portion and the supporting force at the attached portion become a couple force. It can be absorbed flexibly by elastic deformation, and even if a push-up force accompanied by an impact acts, it is possible to reduce the impact on the screw member fixing the attached portion, and the screw is difficult to loosen.
Incidentally, it can be considered that the coil spring part, which is an elastically deformed part, is brought into contact with the upper flange to counter the pushing force. In this case, the upper part of the coil spring is restrained by the upper flange. There is a possibility that the deformation may be adversely affected, and there is a possibility that the two parts may be worn out by rubbing. From this point of view, a structure in which the attached portion is brought into contact with the upper flange is preferable.
In addition, the height of the tine head is set to the same or substantially the same value as the distance between the upper and lower flanges of the channel member. Cost reduction by using the channel member can also be realized.

  According to a fourth characteristic configuration of the present invention, the tine is attached such that a part of the spiral of the coil spring portion protrudes outward from a straight line connecting the outer edge portions of the upper and lower flanges.

  According to the fourth characteristic configuration of the present invention, a part of the spiral of the coil spring portion protruding outward from the straight line connecting the outer edge portions of the upper and lower flanges functions as a coil spring. When attaching / detaching the tine to / from the channel member due to maintenance or the like, it is possible to operate by pinching the outward projecting portion with a finger, and to efficiently perform the attaching / detaching operation of the tine to / from the channel member.

Left side view of the front of the combine Front view of take-in reel Explanatory drawing showing tine installation status Tine mounting structure of another embodiment

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a left side view of a front portion of a normal combine that employs a tine mounting structure for a take-up reel according to the present invention.
The combine is self-propelled by a pair of left and right crawler type traveling devices 1 and 1 and has a driving unit 2 having a driving unit 2 equipped with a driving seat 2a, and a threshing provided on the rear side of the main unit frame 3 of the traveling unit. A grain bagging unit 10 equipped with a bagging tank 11 provided on the side of the threshing machine 4, and a cutting unit 20 having a feeder 21 connected to the front part of the threshing machine 4. Configured.

This combine harvests rice and wheat.
That is, the cutting unit 20 includes the feeder 21, a cutting frame 22 connected to the front end of the feeder 21, a divider 23 provided on both sides of the front end of the cutting frame 22, and the cutting frame. 22 is a clipper-shaped cutting device 24 disposed at the front end of the platform portion 22a so as to be driven, and the cutting frame 22 near the rear of the cutting device 24 and on the upper surface side of the platform portion 22a. An auger 25 that is disposed and rotatably driven, and a scraping reel that is rotatably supported by a pair of left and right support arms 26 and 26 extending forward from the upper part of the base end side of the cutting frame 22. 27.

  The reaping unit 20 is configured such that the platform portion 22a of the reaping frame 22 is close to the ground when the feeder 21 is swung up and down with respect to the threshing machine 4 around a lifting shaft core P facing the body by a hydraulic cylinder 28. Are moved up and down to a lowered working state and the raised non-working state in which the cutting frame 22 is raised from the ground. When the cutting unit 20 is in the descending work state and the traveling machine body is driven, the cutting unit 20 performs the cutting process of the planted cereal cocoon and the supply of the chopped cereal meal to the threshing machine 4.

  That is, a pair of left and right dividers 23, 23 divide the planted culm into a harvesting target and a non-harvesting target, and the harvested planted culm is squeezed into the reaping device 24 by the scraping reel 27. Reap by means of device 24. The harvested cereal meal is fed by the auger 25 to the entrance of the feeder 21 located on the rear side of the auger 25. The harvested cereals that have entered the feeder 21 are conveyed backward in the feeder 21 by the conveyor 29 located in the feeder 21. The whole of the harvested cereal culm that reaches the rear end of the feeder 21 from the stock to the tip is put into the handling room (not shown) of the threshing machine 4 by the scraping action of the conveyor 29.

Next, the scraping reel 27 will be described.
FIG. 2 is a front view of the take-up reel 27. As shown in the drawing, the take-up reel 27 is provided so as to be rotatable integrally with a drive shaft 40 rotatably supported at the distal ends of the pair of support arms 26 and 26 and left and right ends of the drive shaft 40. In the side view of the traveling machine body, the pentagonal reel frame 41 and the circular frame provided so as to be arranged in the circumferential direction on the take-up reel 27 across the pair of left and right reel frames 41 and 41 and positioned one by one on the five tops of the reel frame 41. And a tine mounting bar 42 made of a pipe member and a channel member.

  Each reel frame 41 is wound around five arm 41a made of sheet metal provided in the reel frame main body, a resin block body 43 provided at the tip of each arm 41a, and the five block bodies 43. And an annular belt plate 44 connected to the arm 41a with a fastening bolt together with the block body 43. Each of the block bodies 43 constitutes a mounting portion for rotatably mounting the tine mounting bar 42. The annular band plate 44 is constituted by a divided band plate material divided at each arm 41a.

The take-up reel 27 includes a tine 45 provided on each tine mounting bar 42 in the direction of a take-up reel rotation axis X (hereinafter, abbreviated as “reel rotation axis X”) of the drive shaft 40, and a scrape reel. And a tine holding mechanism 60 having a pentagonal auxiliary rotating body 61 in a side view of the traveling machine body provided on one lateral outer side of the inner reel 27.
The tine holding mechanism 60 rotates around the axis Z different from the reel rotation axis X by the driving force transmitted from the drive reel 27 via the link 63 with the rotation of the take-up reel 27. The tine mounting bars 42 are rotated with respect to the reel frame 41 by rotating the tine mounting bars 42 by the links 63, and the tine 45 of each tine mounting bar 42 is rotated by the take-up reel 27. Regardless, it is configured to maintain a posture extending downward from the tine mounting bar 42.

As shown in FIG. 1, the take-up reel 27 includes a pair of support arms 26, 26 connected to one of the pair of support arms 26, 26 and the cutting frame 22. By swinging up and down with respect to the mowing frame 22 around, it moves up and down between a lowered working state and a raised non-working state.
When the pair of left and right support arms 26 and 26 are lowered and the lower end side of the take-up reel 27 is positioned near the ground G, the take-up reel 27 enters the lower position operation state. Then, the drive reel 40 rotates the take-up reel 27 around the reel rotation axis X, and the tine 45 of each tine mounting bar 42 rotates in the rotation direction A around the reel rotation axis X.
Each tine 45 rotates in a state in which it maintains a posture extending downward from the tine mounting bar 42 by the action of the tine holding mechanism 60, and is supplied to the reaping device 24 while being locked to the planted culm. .

As shown in FIG. 3, the tine mounting bar 42 is formed by integrally fixing a channel member 42B along a state in which the groove opening faces the front of the combine on the lower surface of a tine support bar main body 42A made of metal pipe. It is.
The channel member 42B includes an upper flange 70, a web 71, and a lower flange 72. By welding the upper flange 70 along the tine support bar main body 42A, the tine support bar main body 42A. Integration with is planned.
The web 71 is formed with a plurality of insertion holes 71a for attaching tines at intervals in the longitudinal direction.
In the lower flange 72, slits 72a are formed corresponding to the respective tine mounting positions so as to prevent the lateral movement of the tine 45 by inserting a hanging rod-like portion 81 of the tine 45 described later.

The tine 45 is made of a metal spring material, and a hanging rod-like portion 81 is integrally provided below the tine head 80.
The tine head 80 is provided with a mounted portion 80A attached to the web 71 of the channel member 42B by a screw member 73 at the upper end portion, and a helical coil spring portion 80B around the horizontal axis is connected to the mounted portion 80A. It is configured. 80 A of said to-be-attached parts are shape | molded in the ring shape, and it is comprised so that the said screw member 73 provided with the flat washer 73a may be inserted in the ring hollow part, and it can fix to the said web 71. FIG. Further, in this embodiment, the coil spring portion 80B is formed into a double spiral shape, and the coil spring portion 80B is caused by the reaction force from the planted cereal and the ground G accompanying the rotational drive of the scraping reel 27. The bending displacement of the hanging rod-shaped portion 81 is configured to be absorbed by elastic deformation in the diameter reducing direction (or diameter increasing direction).
Further, as shown in FIG. 3, the positional relationship between the attached portion 80A and the coil spring portion 80B is such that the member axis core j of the screw member 73 that fixes the attached portion 80A is the highest spiral of the coil spring portion 80B. The portion 80Ba is located at the same height (or substantially the same height) as the inner peripheral surface n (see FIG. 3B).

  Accordingly, when the tine 45 is attached to the channel member 42B, the upper end portion of the attached portion 80A is the highest portion of the tine head 80, and the attached portion 80A is close to the lower surface of the upper flange 70 of the channel member 42B. It is attached to a state (a state where a little gap is formed, a contact state, or a substantially contact state). When a pushing-up force from below the tine 45 is applied, the fixing force by the screw member 73 and the supporting force of the upper flange 70 against which the attached portion 80A comes into contact act to stably maintain the attached state of the tine 45.

Incidentally, the tine head height dimension h from the upper end portion of the attached portion 80A to the lowest spiral portion 80Bb of the coil spring portion 80B is the same as the distance between the upper flange 70 and the lower flange 72 of the channel member 42B. Value (or substantially the same value), the tine head 80 can be accommodated in the groove of the channel member 42B without creating extra space, and the channel member 42B to be used has a minimum size. And cost reduction can be achieved.
Further, the tine 45 is configured such that a part of the spiral of the coil spring portion 80B protrudes outward from a straight line connecting the outer edge portions of the upper and lower flanges 70 and 72 of the channel member 42B (FIG. 3 ( a)), this protrusion can be operated by picking with a finger when the tine 45 is attached to or detached from the channel member 42B, for example, due to maintenance (inspection, repair or replacement) of the tine 45, and the maintenance work is efficiently performed. Can be implemented.

According to the tine mounting structure of this embodiment, since the coil spring portion 80B is arranged close to the mounted portion 45a, the displacement acting on the tip portion of the tine 45 is mainly affected by the coil spring portion 80B. It is possible to absorb efficiently by elastic deformation, and it is difficult to cause plastic deformation and fatigue failure of the tine 45, so that the durability of the tine 45 can be improved.
In addition, since each tine 45 can be replaced individually, it is possible to reduce the time for replacing the tine 45.
Furthermore, even if a thrust force acts on the tine 45, the tine mounting bar 42 can maintain a stable support state.
On the other hand, the shape of the tine 45 is also a very simple shape, and the channel member 42B can be made compact with a size close to that of the tine head 80. Therefore, the processing cost of the tine 45 and the material cost of the channel member 42B can be reduced. Can be reduced.
Furthermore, since a part of the spiral of the coil spring portion 80B protrudes forward from the channel member 42B, it can be operated by picking the protruding portion with a finger, and the tine 45 can be attached and detached efficiently.

[Another embodiment]
Other embodiments will be described below.

<1> The take-up reel 27 to which the tine 45 is attached and the combine equipped with the take-up reel 27 are not limited to the structure described in the previous embodiment, and the structure can be changed as appropriate. It is.
<2> The tine 45 is not limited to the shape described in the previous embodiment. For example, as illustrated in FIG. 4, the tine 45 is a screw member 73 that fixes the attached portion 80 </ b> A to the web 71 of the channel member 42 </ b> B. The member axis j is different from the inner peripheral surface of the highest spiral portion 80Ba of the coil spring portion 80B within the height range of the highest spiral portion 80Ba and the lowest spiral portion 80Bb of the coil spring portion 80B. The shape may be a position.
The highest portion of the tine head 80 in a state in which the tine 45 is attached to the channel member 42B is not limited to the upper end portion of the attached portion 80A described in the previous embodiment, but as shown in FIG. The spiral highest portion 80Ba of the coil spring portion 80B may be used.
In the other embodiment, the member axis j is set at a position closer to the lower side than the central portion even within the height range of the highest spiral portion 80Ba and the lowest spiral portion 80Bb. The dimension h can be further reduced, and accordingly, the member cross-section of the channel member 42B can be reduced, and the economy can be further improved.
Furthermore, when a thrust force from below the tine 45 is applied, the fixing force by the screw member 73 and the support force of the upper flange 70 with which the highest spiral portion 80Ba abuts act to change the mounting state of the tine 45. It can be kept stable.
In addition, since the height dimension of the tine head 80 and the distance between the upper and lower flanges of the channel member 42B are set to the same value (or substantially the same), the upper and lower end portions of the tine head 80 are both flanges. Since it is restrained by 70 and 72, it becomes difficult to swing in the vertical direction within the groove of the channel member 42B. As a result, the tine head 80 hardly swings around the member axis j of the screw member 73 even if an external force such as a pushing force against the tine 45 or a lateral deflection force against the hanging rod-shaped portion 81 is repeatedly applied. Can be prevented and a stable mounting state can be maintained. This effect is also exerted in the same manner as described in the previous embodiment, but the embodiment shown in FIG. 4 is more prominent.

  In addition, as mentioned above, although the code | symbol was written in order to make contrast with drawing convenient, this invention is not limited to the structure of an accompanying drawing by this entry. In addition, it goes without saying that the present invention can be carried out in various modes without departing from the gist of the present invention.

  The tine mounting structure of the take-in reel can be used for a normal combine that is equipped with a glen tank instead of a bagging tank.

41 reel frame 42A tine support bar main body 42B channel member 45 tine 70 upper flange 71 web 72 lower flange 72a slit 73 screw member 80 tine head 80A attached portion 80B coil spring portion 80Ba spiral highest portion 80Bb spiral lowest portion 81 hanging rod-shaped portion h Tine head height j Member shaft core (screw member shaft core)
n Inner peripheral surface

Claims (4)

An upper flange of a channel member to which a tine can be attached is attached below the tine support bar main body provided across the left and right reel frames, and the channel member web is spaced apart in the longitudinal direction. A tine mounting structure of a take-up reel in which a large number of tines are mounted in parallel,
The tine is provided with a mounting portion to be attached to the channel member by a screw member at an upper end portion, a hanging rod-like portion at a lower end portion side, and the drooping due to a scratching reaction force accompanying the rotational driving of the scraping reel A helical coil spring portion is provided adjacent to the attached portion around a horizontal axis that can absorb bending displacement of the rod-like portion by elastic deformation, and each tine includes the attached portion. Scratch attached with individual screw members in a state where the member shaft core of the screw member fixed to the web of the channel member is located within the height range of the highest spiral portion and the lowest spiral portion of the coil spring portion. Tine mounting structure for reels.   The tine is in a state in which the hanging rod-like portion is inserted into a slit formed in the lower flange of the channel member, and the highest portion of the tine head including the attached portion and the coil spring portion is the channel member. The tine mounting structure for a take-up reel according to claim 1, wherein the tine mounting structure is attached in a state of being close to the lower surface of the upper flange.   In the tine, the axial center of the screw member that fixes the attached portion is positioned at the same or substantially the same height as the inner peripheral surface of the highest spiral portion of the coil spring portion, and the attached portion is the The height of the tine head is formed to be the highest part of the tine head, and the height dimension of the tine head is set to the same or substantially the same value as the vertical flange interval dimension of the channel member. Tine mounting structure for take-up reel.   The said tine is attached in the state which a part of spiral of the said coil spring part protrudes outward from the straight line which connects the outer edge parts of an up-and-down flange, The scraping as described in any one of Claims 1-3 Tine mounting structure for reels.

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