JPH0672304U - Mounting structure of drilling pin for underground drilling device - Google Patents

Abstract

(57) [Abstract] [Purpose] To make it possible to replace the drilling pin 5 with respect to the driving body 4 easily and in a short time. [Structure] The drive body 4 is provided with a fitting hole 7 into which one end of a hole-piercing pin 5 is removably fitted, and a plate spring 8 is attached to the drive body 4. On the other hand, a retaining pin 83 that protrudes inward and outward from the radial direction and an operating portion 82 that retracts the retaining pin 83 from the fitting hole 7 are provided, while the drilling pin 5 has a fitting hole for the pin 5. The engaging portion 51 that engages with the retaining pin 83 at the time of fitting to the connector 7 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention has a large number of air holes that open to the ground in a lawn such as a golf course, and activates the lawn by supplying air into the ground through the air holes, and also improves drainage of the lawn. It relates to the mounting structure of the drilling pin in the underground drilling device used for.

[0002]

[Prior art]

 Generally, this type of underground drilling device rotatably supports a crank shaft that is rotated by power of an engine or the like on a device body equipped with drive wheels, and at the lower side portion of the crank shaft in the device body, A large number of rods arranged in parallel in the length direction of the crankshaft are supported so as to freely reciprocate up and down, and the upper ends of these rods are connected to the crankshaft, while a pin holding member is provided at the lower end of the rod. A hollow pipe-like hole-piercing pin is attached to each of the pin-holding members, and when the pin-holding member is moved downward, the hole-piercing pins are sequentially driven into the ground to open air holes, and the pin-holding member is also provided. When moving up, the holes are removed in the order in which they are driven, and when the holes are driven into the ground and removed from the ground. , Worn early receives a large resistance, it is necessary to replace with a new hole forming pin, it said hole forming pins are kicked mounted detachably on the pin holding member.

Then, when detachably attaching the piercing pin to the pin holding member, as shown in FIG. 4, conventionally, as shown in FIG. 4, a substantially semicircular curved portion A1 and outward from both sides of the curved portion A1. And a screw hole C1 corresponding to the insertion hole A3 is provided in the pin holding member C while using a mounting metal fitting A formed of fixing portions A2 and A2 having a bolt insertion hole A3. While holding the upper end of the drilling pin B by the curved portion A1 of the mounting bracket A, apply each fixing portion A2 to one side surface of the pin holding member C, and the outside of each fixing portion A2. Then, the fixing bolts D are inserted into the respective through holes A3, and the fixing bolts D are screwed into the screw holes C1 to detachably attach the drilling pins B to the pin holding member C.

[0004]

[Problems to be solved by the device]

 However, each of the drilling pins B suffers a great resistance when driven into the ground and when it is pulled out from the ground, and is worn early and needs to be frequently replaced with a new one. According to the above-mentioned conventional mounting structure, when replacing each of the drilling pins B, it is necessary to attach and detach each of the fixed bolts D screwed between the mounting bracket A and the pin holding member C. Therefore, replacement of a large number of drilling pins B was very troublesome and took a long time.

An object of the present invention is to provide a mounting structure of a drilling pin for an underground drilling device, which allows the drilling pin to be replaced easily and in a short time.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention detachably attaches a drilling pin 5 to a vertically movable reciprocating driving body 4, and when the driving body 4 is moved downward, the piercing pin 5 is driven into the ground. It is a mounting structure of a hole drilling device for an underground hole drilling device, which is formed by inserting and punching an air hole, and a fitting hole 7 into which one end of the hole drilling pin 5 is removably fitted is provided in the driving body 4. At the same time, a leaf spring 8 is attached to the drive body 4, and a retaining pin 83 is inserted into the leaf spring 8 from the lateral side in the radial direction of the fitting hole 7 so as to be movable back and forth. An operation section 82 for moving the pin 83 backward from the fitting hole 7 is provided, while the pin 83 is engaged with the retaining pin 83 when the hole pin 5 is fitted into the fitting hole 7. The locking portion 51 is provided.

The driving body 4 is formed by a driving side member 41 connected to a driving source and a pin holding member 42 detachably attached to the driving side member 41. You may make it provide the fitting hole 7 which fits the one end part of the drilling pin 5 so that insertion / removal is possible, and the leaf spring 8 which has the removal-prevention pin 83 and the operation part 82.

Further, the driving body 4 is provided with a pin hole 43 that opens into the fitting hole 7 from one side in the radial direction of the fitting hole 7, and the leaf spring 8 is the same as the leaf spring 8. It is preferable to provide a bending portion 84 that bends in the plate thickness direction over the entire width between the attachment portion 81 to the drive body 4 and the retaining pin 83.

[0009]

[Action]

 According to the above construction, when replacing the hole drilling pin 5 with a new one, the operating portion 82 of the leaf spring 8 is operated to bend the leaf spring 8 outward while the leaf spring 8 is bent. 8 is pulled out from the engaging portion 51 of the hole-piercing pin 5 inserted into the fitting hole 7 of the driving body 4, so that the hole-piercing pin 5 is fitted into the fitting hole of the driving body 4. 7 and the leaf spring 8 is provided with a retaining pin 83, so that a new hole-piercing pin 5 can be inserted into the fitting hole 7 to engage the engaging portion 51 of the hole-piercing pin 5. By locking the retaining pin 83, the new drilling pin 5 can be easily attached to the fitting hole 7 of the driving body 4, and accordingly, the attaching / detaching operation of the drilling pin 5 with respect to the driving body 4 can be performed. Can be done easily and in a short time.

Further, the driving body 4 is divided into a driving side member 41 connected to a driving source and a pin holding member 42 detachably attached to the driving side member 41, and the pin holding member is formed. When a fitting hole 7 into which one end of the hole-drilling pin 5 is removably fitted and a leaf spring 8 having a retaining pin 83 and an operating portion 82 are provided in 42, the existing hole-drilling device is used. Since the pin holding member 42 can be attached using the pin attaching portion of, the hole forming pin 5 can be detachably attached while simplifying the configuration without special processing of the underground hole forming device. be able to.

Further, the driving body 4 is provided with a pin hole 43 that opens into the fitting hole 7 from one side in the radial direction of the fitting hole 7, and a mounting portion of the leaf spring 8 to the driving body 4. When forming a curved portion 84 that bends in the plate thickness direction over the entire width between the 81 and the retaining pin 83, when attaching the leaf spring 8 to the driving body 4 during the hole making operation by the underground hole making device. It is possible to prevent the portion 81 from being damaged. That is, at the time of attaching / detaching the hole-piercing pin 5 to / from the drive body 4, the leaf spring 8 is bent outward while centering around the attachment portion to the drive body 4, and the retaining pin 83 of the leaf spring 8 is attached. Since it is necessary to advance / retreat the pin hole 43 of the driving body 4, in order to smoothly advance / retreat the retaining pin 83 with respect to the pin hole 43, the diameter of the pin hole 43 should be larger than that of the retaining pin 83. It is necessary to form a large size and provide a gap between the two, but in this case, if the leaf spring 8 is formed in a straight shape without providing the curved portion 84 in the leaf spring 8, it is possible to use the underground drilling device. During the drilling operation in the ground, for example, when the drilling pin 5 is pulled out from the ground, the drilling pin 5 tries to remain on the ground side due to the ground resistance, while the driving body 4 does not work. Forcibly holds 5 on the upper side Since it is going to be raised, the punching pin 5 tends to move downward with respect to the driving body 4 in the range of the gap formed between the retaining pin 83 and the pin hole 43. If the leaf spring 8 is formed in a straight shape, a large load is applied to the leaf spring 8 when the hole-drilling pin 5 is pulled out from the ground, and the attachment portion 81 of the leaf spring 8 to the driving body 4 is damaged. To do it. However, as described above, if the curved portion 84 is formed between the attaching portion 81 of the leaf spring 8 to the driving body 4 and the retaining pin 83, the hole forming pin 5 is formed in the ground. At the time of withdrawal from the above, the bending portion 84 is elastically deformed in the extension direction by the load applied to the leaf spring 8, the retaining pin 83 abuts the inner surface of the pin hole 43, and the load is transferred from the pin hole 43 to the driving body 4. Since it can be made to act, it is possible to prevent damage to the mounting portion of the leaf spring 8 to the driving body 4 without further increasing the rigidity thereof.

[0012]

【Example】

 FIG. 3 shows the entire structure of the underground drilling device, which supports a pair of drive wheels 2 and 2 on both left and right sides of an apparatus body 1 equipped with an engine and controls the apparatus body 1 at the front side in the traveling direction. A handle 3 is provided, and a crankshaft 6 which is rotated by the power from the engine is rotatably supported on the upper part of the apparatus main body 1, and the crankshaft 6 is provided at a lower portion of the crankshaft 6. A plurality of rods 61 arranged in parallel in the longitudinal direction of the rod 61 are supported reciprocally in the vertical direction via bearings 11, and the upper ends of these rods 61 are connected to the crankshaft 6 while The driving body 4 is connected to the lower end portion of each rod 6, and two drilling pins 5 are detachably attached to the driving body 4. Then, by driving the crankshaft 6 to rotate, the respective driving bodies 4 are sequentially moved up and down through the respective rods 61, and when the driving bodies 4 are moved downward, the respective drilling pins 5 are put into the ground, for example. Air holes are formed at intervals of 50 mm, and when the driving member 4 is moved upward, the hole-drilling pins 5 are removed from the ground in the order in which they are driven.

As shown in FIGS. 1 and 2, the driving body 4 is detachable from the driving member 41 and the block-shaped driving member 41 connected to the rod 61. It is composed of two members including a pin holding member 42 having a hollow cylindrical shape to be attached, and a coupling hole 41a is formed in the driving side member 41, and a screw portion 61a provided in the coupling hole 41a on the lower end side of the rod 61. 4 are integrally coupled with each other, and are matched with a pair of screw holes 41b for mounting the mounting bracket A shown in FIG. 4, that is, the bolt insertion hole A3 of the mounting bracket A, on one side surface of the driving side member 41. The screw hole 41b is provided, while the pin holding member 42 is held by a small connecting portion 42a having a diameter substantially the same as the outer diameter of the drilling pin 5, that is, a curved portion A1 of the mounting bracket A. Possible connection part 42a and the connection The fitting portion A is provided with a cylindrical portion 42b having a diameter larger than that of the fitting portion 42a, and a fixing bolt D that is inserted into the bolt insertion hole A3 of the mounting bracket A is screwed into the screw hole 41b. It is attached to the drive side member 41, the joint portion 42a of the pin holding member 42 is inserted into the curved portion A1 of the mounting bracket A, and the fixing bolt D is tightened to hold the joint portion 42a. After fixing, the pin holding member 42 is detachably attached to the driving side member 41.

Further, inside the pin holding member 42, there is formed a fitting hole 7 through which the upper part of the drilling pin 5 is detachably inserted from the lower end of the tubular portion 42b to the intermediate height position. From the upper end of the fitting hole 7 to the upper end of the coupling portion 42a, an insertion hole 42d having a diameter smaller than that of the fitting hole 7 and having a diameter substantially equal to the inner diameter of the drilling pin 5 is formed. The stepped portion 42e formed between the insertion hole 42d and the fitting hole 7 receives and supports the upper end of the hole-drilling pin 5, while the connecting portion 42a of the tubular portion 42b is formed. A mounting hole 44 is provided in the side end portion, a pin hole 43 is provided in the lower end side, and the leaf spring 8 is mounted in the mounting hole 44.

The leaf spring 8 has an attachment portion 81 attached to an upper portion of the leaf spring 8 via a fixture 8a such as a screw, and an operation portion 82 bent outward at a lower end of the tip. On the inner surface of the upper side of the operation portion 82, there are provided retaining pins 83 which can move forward and backward from the outside in the radial direction of the fitting hole 7, while the retaining pins 83 and the attaching portion 81 are provided. A curved portion 84 that curves in the plate thickness direction over the entire width is integrally formed between and. Further, a locking portion 51 formed of a through hole with which the retaining pin 83 is engaged when the hole-piercing pin 5 is inserted into the fitting hole 7 is formed above the hole-piercing pin 5. The locking portion 51 may have a groove shape capable of locking the retaining pin 83.

On the other hand, the pin hole 43 is formed to have a diameter larger than the retaining pin 83 of the leaf spring 8, and the retaining pin 83 is locked from the pin hole 43 by the urging force of the leaf spring 8. The hole forming pin 5 is fixedly held on the side of the pin holding member 42 by being projected into the portion 51. Then, when the hole-drilling pin 5 is driven into the ground, the upper end of the hole-drilling pin 5 is brought into contact with a step 42e provided between the insertion hole 42d and the fitting hole 7, and The stepped portion 42c formed between the connecting portion 42a of the holding member 42 and the tubular portion 42b is brought into contact with the lower end surface of the driving side member 41, so that the hole forming pin 5 or the pin holding member 42 side It is designed to receive the load applied to it. Further, the retaining pin 83 of the leaf spring 8 is formed with an inclined wall portion 83a inclined from the lower portion to the upper side at the tip end side thereof, and the pin holding member 42 has the fitting hole 7 in which the drilling pin is formed. 5 is inserted from the lower side, the upper end of the hole forming pin 5 is inserted into the upper side while being in contact with the inclined wall 83a, so that the retaining pin 83 is inserted into the leaf spring 8 through the inclined wall 83a. It is retracted into the pin hole 43 against the urging force of the above, so that the attaching operation of the hole making pin 5 to the fitting hole 7 can be easily performed.

Next, the operation of the above configuration will be described. When the hole drilling work is performed by the hole drilling device and the hole drilling pin 5 is worn and is replaced with a new hole drilling pin 5, the operating portion 82 of the leaf spring 8 is pulled in the direction of the arrow in FIG. By operating the leaf spring 8 outwardly with the mounting portion 81 as a fulcrum, the retaining pin 83 provided on the leaf spring 8 is held on the pin holding member 42 side of the driving body 4. By pulling out the engaging portion 51 of the punching pin 5 into the pin hole 43 of the pin holding member 42, the engagement of the retaining pin 83 with the engaging portion 51 is released. By pulling the hole-drilling pin 5 downward from the pin-holding member 42 in this state, the hole-drilling pin 5 can be easily taken out from the pin-holding member 42 side, and a new hole can be added from the lower side of the fitting hole 7. Mating a simple drilling pin 5 The retaining pin 83 retracts into the pin hole 43 through the inclined wall 83a against the biasing force of the leaf spring 8, and the hole-piercing pin 5 is fitted until its upper end abuts the step 42e. By this fitting, the locking portion 51 of the hole-drilling pin 5 coincides with the retaining pin 83, and the retaining pin 83 enters the fitting hole 7 by the urging force of the leaf spring 8 to cause the retaining portion 51. With this engagement, the new drilling pin 5 can be easily attached to the pin holding member 42. Therefore, the attachment / detachment operation of the above-mentioned drilling pin 5 with respect to the pin holding member 42 is performed. Can be performed easily and in a short time.

Further, when the hole-piercing pin 5 is fitted and fixed in the fitting hole 7, the leaf spring 8 urges the retaining pin 83 so as not to come out of the locking portion 51 of the hole-piercing pin 5. Therefore, the hole-piercing pin 5 can be securely attached to the pin holding member 42 side without being detached, and moreover, the leaf spring 8 holds the retaining pin 83 and the retaining pin. Since the function of urging 83 toward the locking portion 51 is provided, the configuration can be simplified. Furthermore, when the hole-drilling pin 5 is driven into the ground, the upper end of the hole-drilling pin 5 is brought into contact with a stepped portion 42e provided between the insertion hole 42d and the fitting hole 7, and Since the stepped portion 42c formed between the fitting portion 42a of the holding member 42 and the tubular portion 42b is brought into contact with the lower end surface of the drive side member 41, the hole forming pin 5 and the pin holding member 42 side are provided. It is possible to reliably receive such a load.

Further, the driving body 4 is divided into the driving side member 41 and the pin holding member 42, and the pin holding member 42 is provided with the fitting hole 7 of the hole making pin 5 and the leaf spring 8. Since the pin holding member 42 is provided, it is possible to mount the pin holding member 42 using the existing pin mounting portion formed in the underground drilling device, that is, the mounting bracket A shown in FIG. Therefore, the drilling pin 5 can be detachably attached while simplifying the configuration without performing any special processing on the underground drilling device.

Further, the pin holding member 42 of the driving body 4 is formed with a pin hole 43 which is opened inward from one side in the radial direction of the fitting hole 7, and at the same time as the mounting portion 81 of the leaf spring 8. Since a curved portion 84 that curves in the plate thickness direction over the entire width is formed between the retaining pin 83 and the retaining pin 83, the mounting portion 81 of the leaf spring 8 is damaged during the drilling work by the underground drilling device. This can be prevented in advance. That is, at the time of attaching / detaching the hole-drilling pin 5 to / from the pin holding member 42, the leaf spring 8 is bent outwardly around the attachment portion 81 by the fixture 8a, and the retaining pin provided on the leaf spring 8 is secured. Since the pin 83 is advanced and retracted with respect to the pin hole 43 of the pin holding member 42, in order to smoothly advance and retract the retaining pin 83 with respect to the pin hole 43, the diameter of the pin hole 43 is larger than that of the retaining pin 83. It is necessary to form a large size to provide a gap between the two, but at this time, if the leaf spring 8 is formed in a straight shape without providing the curved portion 84, the underground hole drilling device At the time of a hole drilling operation in the ground, for example, when the above-mentioned hole drilling pin 5 is pulled out from the ground, the hole drilling pin 5 tries to remain on the ground side due to ground resistance, whereas the pin holding member 42 does not axis Since the hole-drilling pin 5 is forcibly lifted upwards via the pin, the hole-drilling pin 5 is attached to the pin holding member 42 within the range of the gap formed between the retaining pin 83 and the pin hole 43. Therefore, when the leaf spring 8 is formed in a straight shape, a large load is applied to the leaf spring 8 when the hole-drilling pin 5 is removed from the ground, and the leaf spring 8 is fixed to the fixed portion. The tool 8a may be damaged. However, as described above, if the curved portion 84 is formed between the mounting portion 81 of the leaf spring 8 and the retaining pin 83, the leaf plate 5 can be removed from the ground when the bending pin 84 is removed from the ground. The bending portion 84 is elastically deformed in the extension direction by the load applied to the spring 8, the retaining pin 83 abuts the inner surface of the pin hole 43, and the load acts on the pin holding member 42 from the pin hole 43. Therefore, it is possible to prevent damage to the plate spring mounting portion such as the fixing member 8a without further increasing the rigidity thereof.

In the above embodiment, the driving body 4 is divided into the driving side member 41 and the pin holding member 42. However, in the present invention, both of them may be integrated. Is.

[0022]

[Effect of device]

 As described above, in the present invention, the drilling pin 5 is removably attached to the vertically movable reciprocating driving body 4, and when the driving body 4 is moved downward, the piercing pin 5 is driven into the ground to open the air holes. In the structure for mounting the drilling pin for the underground drilling device as described above, the driving body 4 is provided with a fitting hole 7 into which one end of the drilling pin 5 is removably fitted, and the driving body 4 is provided with a plate. A spring 8 is attached to the leaf spring 8, and a retaining pin 83 that can move forward and backward from the radial side of the fitting hole 7 to the inner side, and the retaining pin 83 move backward from the fitting hole 7. While the operating portion 82 is provided, the hole forming pin 5 is provided with the engaging portion 51 that engages with the retaining pin 83 when the hole forming pin 5 is fitted into the fitting hole 7. Along with the drilling work in the ground with the drilling device, the drilling pin When the hole-drilling pin 5 is replaced with a new one by operating the operating portion 82 of the leaf spring 8, the retaining pin 83 provided on the leaf spring 8 is fitted into the fitting hole of the driving body 4. By pulling it out from the engaging portion 51 of the hole-piercing pin 5 which is inserted and held in 7, it is possible to easily take out the hole-piercing pin 5 from the fitting hole 7 of the driving body 4, and Since the leaf spring 8 is provided with the retaining pin 83, a new hole-piercing pin 5 is inserted into the fitting hole 7, and the retaining pin 83 is locked to the locking portion 51 of the hole-piercing pin 5. The new drilling pin 5 can be easily attached to the fitting hole 7 of the driving body 4, and therefore, the attaching / detaching operation of the drilling pin 5 with respect to the driving body 4 can be performed easily and in a short time. .

Further, the driving body 4 is divided into a driving side member 41 connected to a driving source and a pin holding member 42 detachably attached to the driving side member 41, and the pin holding member is formed. 42 is provided with a fitting hole 7 into which one end of the boring pin 5 is removably fitted, and a leaf spring 8 having a retaining pin 83 and an operating portion 82. Since the pin holding member 42 can be attached by using the existing pin attachment portion formed on the hole, the hole forming pin can be simplified while the structure is simplified without special processing of the underground hole forming device. 5 can be attached detachably.

Further, the driving body 4 is provided with a pin hole 43 that opens into the fitting hole 7 from one side of the fitting hole 7 in the radial direction, and a mounting portion of the leaf spring 8 to the driving body 4 is provided. When forming a curved portion 84 that bends in the plate thickness direction over the entire width between 81 and the retaining pin 83, when the punching pin 5 is removed from the ground, the bay spring 8 is loaded by the load. The bent portion 84 is elastically deformed in the extension direction, the retaining pin 83 contacts the inner surface of the pin hole 43, and the load can be applied to the driving body 4 from the pin hole 43. It is possible to prevent the attachment portion from being damaged without increasing the rigidity of the attachment portion to the body 4.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view showing a mounting structure of a drilling pin according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is a rear view showing the overall structure of the underground drilling device.

FIG. 4 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

 4 Drive body 41 Drive side member 42 Pin holding member 43 Pin hole 5 Drilling pin 51 Locking part 7 Fitting hole 8 Leaf spring 82 Operating part 83 Stopping pin 84 Bending part

Claims (3)

[Scope of utility model registration request] 1. A drilling pin (5) is removably attached to a vertically movable reciprocating driving body (4), and when the driving body (4) is moved downward, the piercing pin (5) is driven into the ground. A structure for mounting a drilling pin for an underground drilling device, which is formed by punching an air hole, wherein a fitting hole (removably fits one end of the drilling pin (5) to the driving body (4) ( 7) is provided and a leaf spring (8) is attached to the drive body (4), and the leaf spring (8) is inserted into the fitting hole (7) from the radial side of the fitting hole (7). A retaining pin (83) that movably moves forward and backward and an operating portion (82) that retracts the retaining pin (83) from the fitting hole (7) are provided, while the hole-piercing pin (5) includes: A locking portion (51) that engages with the retaining pin (83) when the hole-piercing pin (5) is fitted into the fitting hole (7). A structure for mounting a drilling pin for an underground drilling device, which is characterized by being provided. 2. The driving body (4) comprises a driving side member (41) connected to a driving source and a pin holding member (42) detachably attached to the driving side member (41). The pin holding member (42) has a fitting hole (7) into which one end of the hole making pin (5) is removably fitted, and a retaining pin (8).
3) and a leaf spring (8) having an operating portion (82). 3. The driving body (4) is provided with a pin hole (43) opening into the fitting hole (7) from one side in the radial direction of the fitting hole (7), and the leaf spring (8) is A curved part (84) curved in the plate thickness direction over the entire width between the mounting part (81) of the leaf spring (8) to the drive body (4) and the retaining pin (83).
The mounting structure for a drilling pin for an underground drilling device according to claim 1, further comprising: