JP4170540B2 - Side open tine and hold pin connection structure of aeration machine for soil improvement - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a side open tine of an aeration machine for soil improvement used to improve the soil on the turf surface in golf courses, parks, etc., and more specifically, the side open tine is attached to and detached from a hold pin. The present invention relates to a connecting structure for enabling connection.
[0002]
[Prior art]
The structure of the side open tine of a conventional soil improvement aeration machine is as shown in FIG. 9 in which a pipe-shaped side open tine main body 11 and a hold pin for detachably attaching the side open tine main body 11 to a tine holder of the machine main body. 12, a connecting pin 13 that removably connects the side open tine main body 11 to the hold pin 12, and a spring pin 10 that prevents the connecting pin 13 from coming off. The side open tine main body 11 is a long hole 11 B for soil removal. A pin insertion hole 11D through which the connecting pin 13 passes is formed at an upper position, and the hold pin 12 has an insertion shaft portion 12C to be inserted into the side open tine body 11, and the connecting pin 13 is provided on the side of the insertion shaft portion 12C. The through-hole 12E is drilled, and the distal end of the insertion shaft portion 12C is formed on the inclined surface 12D. Surface 12D is formed at the upper end portion 11C flush with the long hole 11B of the side open tines body 11, the pin hole 13C of the spring pin 10 is provided on the connecting pin 13.
[0003]
The side open tine main body 11 is connected to the hold pin 12 by inserting the insertion shaft portion 12C of the hold pin 12 from the upper side of the side open tine main body 11, and holding pin 12 from the pin insertion hole 11D of the side open tine main body 11. After inserting the connecting pin 13 into the through hole 12E, the spring pin 10 is inserted into the pin hole 13C of the connecting pin 13 to fix the connecting pin 13, and the hold pin 12 and the side open tine body 11 are detachably connected. It was.
[0004]
[Problems to be solved by the invention]
Side open tine is very consumable, and even a small machine must be equipped with more than a dozen side open tines and replaced with a new one about every half day to every day. However, if the spring pin is fastened to fix the connecting pin after the connecting pin is inserted as described above to replace the side open tine, it takes a considerable time to attach and detach the pin.
In addition, the spring pin may be cut by friction caused by sand splash during operation, and the connecting pin may fall off.
[0005]
In view of the above, the present invention is to provide a structure for connecting a side open tine and a hold pin of an aeration machine for soil improvement that makes it easy to replace a side open tine that is a consumable and allows a safe replacement operation in a short time. It is what.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the structure of the present invention is such that an insertion shaft portion of a hold pin attached to a tine holder of an aeration machine is inserted into an upper portion of a side open tine body, and a connecting pin is inserted into the insertion portion from a side portion of the side open tine body. In the side open tine of the aeration machine that detachably connects the side open tine body to the hold pin, the hold pin has a downwardly biased protrusion that protrudes into a through hole provided in the hold pin. A recess for fitting the projection into the shaft portion of the connecting pin, a guide groove extending from the bottom of the recess toward the outer peripheral surface of the shaft portion in the circumferential direction of the shaft portion, and A guide surface that engages with the protrusion is formed at the tip.
[0007]
In addition, a guide groove that communicates with the outer peripheral surface of the shaft portion from the bottom of the recess toward the tip of the shaft portion may be provided.
[0008]
In the present invention having the above configuration, the hold pin of the side open tine main body is connected by inserting the insertion shaft portion of the hold pin from the upper side of the side open tine main body, and holding pin from the side of the side open tine main body to the insertion portion. The side open tine main body is detachably connected to the hold pin through the through-hole of the connector, but if the connection pin is inserted into the through-hole so that the recess is on the upper side, the tip of the connection pin The provided guide surface engages with the protrusion and pushes the connecting pin further. When the protrusion touches the outer peripheral surface of the shaft portion, the protrusion resists the biasing force and retracts from the through hole. When the position of the recess coincides with the position of the protrusion, the protrusion is biased downward, so that it protrudes and fits into the recess, and the connecting pin is fixed.
[0009]
When the connecting pin is removed, a guide groove is provided from the bottom of the concave portion of the connecting pin to the outer peripheral surface of the shaft portion in the circumferential direction of the shaft portion, so that the protrusion is along the guide groove. , The projection engages with the guide groove from the recess and retracts against the urging force when reaching the outer peripheral surface of the shaft portion, so that the connecting pin can be pulled out at this position.
[0010]
Next, when the guide groove is provided so as to communicate with the outer peripheral surface of the shaft portion from the bottom of the recess toward the tip of the shaft portion, if the connecting pin is inserted into the through hole so that the recess is on the upper side, the same as before When reaching the outer peripheral surface of the shaft portion from the slope of the connecting pin, the protrusion retracts from the through hole against the biasing force.
Then, if the connecting pin is further pushed in, the protrusion is engaged with the guide groove on the outer peripheral surface of the shaft portion, gradually protrudes with an urging force, is fitted into the concave portion, and the connecting pin is fixed.
[0011]
When removing the connecting pin, if the connecting pin is pulled, the protrusion engages from the recess to the guide groove and gradually retracts, and when reaching the outer peripheral surface of the shaft portion of the connecting pin, the protrusion resists the urging force. Since it retracts, the connecting pin can be pulled out.
[0012]
As described above, the connecting pin is fixed by simply pushing the connecting pin, and the connecting pin can be detached by only rotating or pulling the connecting pin.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 is a partial cross-sectional view showing a state in which the side open tine main body and the hold pin of the present invention are connected, FIG. 2 is a partial cross-sectional view showing the connection in the same manner, and FIG. 3 is a state in which the side open tine is attached to the tine holder 4 is a front view showing the side open tine and the tine holder separated, FIG. 5 is a perspective view of the connecting pin of claim 1, FIG. 6 is an enlarged sectional view of the same, and FIG. It is sectional drawing of a pin.
[0014]
Thus, the side open tine main body 1 has a circular cutting edge 1A formed at the tip by thinning the tip of the pipe material, and a long hole 1B for earth removal is formed at the side.
The upper and lower end portions 1C of the long hole 1B for earth removal are inclined. And the pin insertion hole 1D of the connection pin 3 which connects the hold pin 2 and the side open tine main body 1 so that attachment or detachment is possible is carried out by the peripheral side surface of the side open tine main body 1 in the upper position from the long hole 1B for earth removal. .
As long as the pin insertion hole 1D is positioned above the long hole 1B for earth removal, the pin insertion hole 1D may not be on the same side as the long hole 1B for earth removal, as shown in the drawing.
[0015]
The hold pin 2 is a round bar-like member comprising a mounting shaft portion 2A as a head, an intermediate flange portion 2B, and a lower insertion shaft portion 2C. The mounting shaft portion 2A is attached to a tine holder 4 of the machine body by screwing or the like. It is done.
The outer diameter of the insertion shaft portion 2 </ b> C has a width that matches the inner diameter of the side open tine body 1.
[0016]
The lower end of the insertion shaft portion 2C is formed in an inclined surface 2D, and the inclined surface 2D is inserted so as to be positioned at least below the upper end portion 1C of the long hole 1B for earth removal of the side open tine body 1. A through hole 2E of the connecting pin 3 is formed in the side portion of the insertion shaft portion 2C.
The through hole 2E matches the position of the pin insertion hole 1D of the side open tine body 1 when the insertion shaft portion 2C is inserted into the side open tine body 1.
[0017]
Further, a vertical hole 2F is drilled from the upper surface of the mounting shaft portion 2A of the hold pin 2 toward the through hole 2E. The vertical hole 2F has a thread groove 2G formed on its inner diameter and is continuous with the vertical hole 2F. A communication hole 2H having a smaller diameter than the vertical hole 2F communicating with the through hole 2E from the bottom of the vertical hole 2F is provided.
[0018]
A pin 5 is provided downward in the lower portion of the vertical hole 2F, and a spring holding and adjusting nut 6 that is screwed into the screw groove 2G is provided in the upper portion of the vertical hole 2F. The adjusting nut 6 and the head 5A of the pin 5 are provided. A coil spring 7 that urges the pin 5 downward at all times is interposed therebetween.
The shaft portion 5B of the pin 5 is inserted into the communication hole 2H, and the tip thereof protrudes as a protrusion 5C into the through hole 2E from the communication hole 2H by the urging force of the coil spring 7.
The tip of the protrusion 5C is rounded. The biasing force is adjusted by rotating the nut 6.
The urging means may be interposed with other elastic ones, such as cretan rubber.
[0019]
The connecting pin 3 is formed on the head 3A and the shaft portion 3B, and connects the hold pin 2 inserted into the side open tine main body 1 and the side open tine main body 1, and includes one pin insertion hole of the side open tine main body 1. 1D is inserted into the through hole 2E of the hold pin 2, and the tip of the shaft portion 3B protrudes from the other pin insertion hole 1D.
[0020]
The shaft portion 3B of the connecting pin 3 is provided with a recess 3C into which the protrusion 5C is fitted at a corresponding position of the protrusion 5C protruding into the through hole 2E when the connecting pin 3 is inserted into the through hole 2E.
A guide groove 3D is formed which extends from the bottom of the recess 3C to the outer peripheral surface of the shaft portion 3B extending in the circumferential direction of the shaft portion 3B (FIGS. 5 and 6).
In the drawing, the guide groove 3D is formed only in one direction, but of course, it can be formed in both directions.
[0021]
Alternatively, the guide groove 3D can be formed so as to extend from the bottom of the recess 3C toward the tip of the shaft portion 3B and communicate with the outer peripheral surface of the shaft portion 3B (FIG. 7).
In addition, a guide surface 3E inclined forward to engage with a protrusion 5C protruding into the through hole 2E during insertion of the connecting pin 3 into the through hole 2E is formed at the tip of the shaft portion 3B.
The through hole 3F provided on the side surface of the head of the connecting pin 3 is for inserting an operating tool and rotating the connecting pin 3, and can be provided if necessary.
In addition, as shown in FIG. 8, the connecting pin 3 can be formed as an operation knob 3G formed with a tapered guide surface 3E at the tip of the shaft portion 3B and a large head so that the head can be rotated by a finger.
[0022]
【The invention's effect】
According to the present invention, the connection between the side open tine main body and the hold pin is fixed simply by pushing the connection pin from the insertion hole of the side open tine main body into the through hole of the hold pin. Alternatively, the side open tine body can be replaced easily and in a short time with a single touch since it only needs to be pulled, and is a useful invention that can improve the efficiency of the replacement work.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing a state in which a side open tine main body and a hold pin of the structure of the present invention are connected.
FIG. 2 is a partial cross-sectional view showing a halfway connection between a side open tine body and a hold pin of the structure of the present invention.
FIG. 3 is a front view showing a state in which a side open tine having a structure of the present invention is attached to a tine holder.
FIG. 4 is a front view showing a state in which the side open tine and the tine holder of the structure of the present invention are separated.
FIG. 5 is a perspective view of a connecting pin of the structure of the present invention according to claim 1;
FIG. 6 is an enlarged cross-sectional view of a connecting pin of the structure of the present invention according to claim 1;
FIG. 7 is a cross-sectional view of a connecting pin of the structure of the present invention according to claim 2;
FIG. 8 is a cross-sectional view showing another embodiment of a connecting pin having a structure of the present invention.
FIG. 9 is an exploded perspective view of a conventional side open tine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Side open tine main body 1A Side open tine cutting edge 1B Side open tine earth cutting long hole 1C Side open tine end hole 1D Side open tine pin insertion hole 2 Hold pin 2A Attaching the hold pin Shaft 2B Hold pin flange 2C Hold pin insertion shaft 2D Hold pin inclined surface 2E Hold pin through hole 2F Hold pin vertical hole 2G Hold pin vertical hole 2H Hold pin communication hole 3 Connection Pin 3A Connection pin head 3B Connection pin shaft 3C Connection pin recess 3D Connection pin guide groove 3E Connection pin guide surface 3F Connection pin through hole 3G Connection pin operation knob 4 Tine holder 5 Pin 5A Head portion 5B Pin shaft portion 5C Pin protrusion 6 Adjustment nut 7 Coil spring

Claims (2)

An insertion shaft of a hold pin attached to the tine holder of the aeration machine is inserted into the upper part of the side open tine main body, and a connecting pin penetrates from the side of the side open tine main body to hold the side open tine main body into the hold pin. In the side open tine of the aeration machine that is detachably connected to the holding pin, the hold pin is provided with a downwardly biased protrusion protruding into a through hole provided in the hold pin, and the shaft portion of the connection pin A recess into which the protrusion is inserted is provided, a guide groove is provided from the bottom of the recess to the outer peripheral surface of the shaft portion in the circumferential direction of the shaft portion, and a guide surface that engages with the protrusion is provided at the tip of the shaft portion. A structure for connecting a side open tine and a hold pin of an aeration machine for soil improvement characterized by being formed. 2. The structure for connecting a side open tine and a hold pin of an aeration machine for soil improvement according to claim 1, wherein a guide groove is provided from the bottom of the recess toward the tip of the shaft to communicate with the outer peripheral surface of the shaft.

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