JP4939346B2 - Dividable impact pressure receiving device in impact penetration testing machine - Google Patents

Description

  The present invention is a striking penetration testing machine for striking a penetrating rod, penetrating it into the ground, and investigating the underground structure and ground strength of the ground, and more specifically, a striking pressure receiving device that is hit by a hammer member. Regarding improvement.

As a hitting penetration testing machine that has been used conventionally, an automatic penetration testing machine disclosed in Patent Document 1 is well known. This automatic penetration testing machine has a hammer member movable along a standing guide rod, a penetration rod disposed below the hammer member and penetrated into the ground by hammering, and the movement of the hammer member. And an endless chain rotating in the vertical direction parallel to the direction. In this endless chain, three lifting tools are arranged at equal intervals, and the hammer member is provided with a locking part that is always on the moving path of the lifting tool and can be expanded. . The hammer member is lifted by a lifting tool that moves as the endless chain rotates in the vertical direction (circulation feed) to lock the locking portion. And the latch release member is provided in the predetermined position on the movement path of a hammer member, and the latching tool of the hammer member which raises by this is rotated, and engagement with this and a raising tool is cancelled | released in a predetermined position. It is configured as follows. The hammer member thus disengaged falls by its own weight, gives a striking force to the penetrating rod, and penetrates the penetrating rod into the ground.
Japanese Utility Model Publication No. 6-49611

In such a conventional automatic penetration testing machine, since hammering is repeated to drive to a predetermined position, a knocking head is interposed to protect the penetration rod from direct hitting. If the impact is repeated, the knocking head gradually deforms, and the entire unit including the knocking head and the guide rod integrated with the knocking head must be replaced. Yes. In addition, it is necessary to remove the hammer member and the like, and then adjust and set the hammer member again in order to replace the guide rod. Further, in this conventional example, a connector is interposed to protect the male screw portion of the base end portion at one end of the penetrating rod when the penetrating rod is attached, but clogging occurs due to deformation of the knocking head. There are problems such as the possibility that the connector and the penetrating rod cannot be removed from the knocking head.

  An object of the present invention is an automatic penetrating tester that eliminates such problems and allows only a consumable part to be easily and quickly replaced and allows only a necessary portion to be replaced, thereby enabling a quick penetrating test to be restarted. It is to obtain a striking pressure receiving device.

An object of the present invention is to provide a hammer member (40) that can be moved up and down along a guide member (34) that is erected, a penetration rod (7) that penetrates into the ground when struck by the hammer member, and the penetration rod. in a blow pressure unit which receives the support to directly blow the hammer member (50) and the percussion penetration tester with the striking pressure unit, falling position of the hammer member rear end of the penetration rod asked to support A cylinder member (60) disposed on the cylinder member , a knocking head (51) fixed to the end face of the cylinder member so as to be detachable and colliding with the hammer member, and a hole formed in the knocking head so as to communicate with the cylinder member. is set, the extrusion bolt (9) and extrudable female screw hole of the penetration rod by screwing (53), consists of a divisible blow pressure device It is achieved by providing.

In addition to the above-described configuration, it is desirable that a silencing member (54) is detachably fixed to a surface where the hammer member collides with the knocking head.

  According to the present invention, since the impact pressure receiving device is assembled so as to be divided into the knocking head and the cylinder member that supports the penetrating rod, even if the knocking head is deformed due to the hammering of the hammer member, the knocking head can be disengaged from the penetrating rod. The head can be removed and replaced, so that almost no adjustment is required even if the member is replaced during penetration. Further, since the silencing member is fixed to the surface of the knocking head facing the hammer member via a hard plate, the silencing member directly contacts the fixing bolt that integrally fixes the knocking head and the cylinder member. There is no deformation, and the life of the muffling member is extended. Furthermore, since a female screw hole for fixing the sound deadening member communicating with the knocking head in the cylinder member is formed, the penetrating rod is in a state of being bitten in the cylinder member, or soil is entered by the operator. If it is difficult to pull out, if a long extrusion bolt with a leg reaching the cylinder member is screwed into this female screw hole, the penetration rod can be easily pushed out. can get.

  The best mode for carrying out the present invention will be described below with reference to the drawings. 6 and 7, reference numeral 1 denotes a striking penetration tester, which has a construction in which a striking unit 20 is mounted on a base unit 10. The base unit 10 uses the structure disclosed in Japanese Patent Application Laid-Open No. 2004-263417. That is, the base unit 10 has a first support column 3 erected on the stand 2, and a lifting platform 4 is guided to the first support column 3 so as to be movable up and down. A sprocket (not shown) positioned on the back side of the first support column 3 is rotatably provided on the lifting platform 4. The sprocket extends linearly in the vertical direction on the back surface of the first support column 3. It meshes with the attached chain member 5. For this reason, when the forward drive of the unit elevating motor 11 is received, the elevating platform 4 rises. The lifting platform 4 is stopped at a predetermined position by the unit lifting / lowering motor 11 and maintains its height position. When a signal from a hitting unit 20 described later is input, the lifting platform 4 is lowered by a predetermined amount. It is configured.

  Further, as shown in FIG. 6, the striking unit 20 is composed of an elevator unit 30 and a hammer member 40. The elevator unit 30 includes a second column 31 erected on a lifting platform of the base unit 10 and An endless chain 32 is provided on the front surface of the second support column 31 and circulates along the second support column 31. The endless chain 32 is wound around a sprocket (not shown) disposed above and below the second support 31 and circulates. The endless chain 32 is moved by a hammer operating motor 33. It is designed to be circulated. At predetermined positions of the endless chain 32, locking members (not shown) projecting on both sides in the width direction of the endless chain 32 are integrally fixed.

  Further, the second strut 31 is provided with a release member (not shown) for releasing the rise of the hammer member 40 at a predetermined height position. By the action of the release member, the hammer member 40 is The operation of being lifted by being engaged by the endless chain 32 is cut off and the weight falls.

  On the front surface of the second support column 31, a pair of guide rails 34, which are parallel to the guide rails 34 that form a lifting / lowering movement path, are erected in a pair, and the hammer member 40 is interposed between the guide members 34. Has been placed. As a result, the hammer member 40 is guided so as to move up and down along the guide member 34, and the hammer pressure receiving unit 50 that directly receives the hammer member 40 hits the center line passing through the center of the hammering portion of the hammer member 40. The knocking head 51 is arranged so that the centers thereof coincide. The knocking head 51 that constitutes the impact pressure receiving unit 50 passes through a table 6 that is fixed to the lifting platform 4, and as shown in FIGS. 1 and 2, is a hollow cylinder member that is supported by being inserted downward. 60 is fixed by a fixing bolt 61 so as to be detachable. The cylinder member 60 is guided to move in the axial direction by a bearing member 62 fixed to the table 6.

  Moreover, the knocking head 51 has a stepped guide hole 52 formed in the center thereof, and a female screw 53 is formed in the upper narrow hole. On the other hand, the large-diameter hole located below the guide hole 52 is large enough for the male screw 7a at the base end of the penetrating rod 7 to enter and deep enough that the end surface of the male screw 7a does not hit the knocking head 51. The diameter is smaller than the diameter of the penetrating rod 7. In other words, the guide hole 52 has a hole diameter smaller than the diameter of the penetrating rod 7 on the extension of the center line when the knocking head 51 is fixed to the cylinder member 60. The knocking head 51 comes into contact with the peripheral edge. In this embodiment, the guide hole 52 has a stepped shape, but instead, a narrow hole may have a straight hole shape having the same diameter as the large diameter hole.

  On the upper side of the knocking head 51, that is, on the side facing the hammer member 40, a muffler member 54 for reducing the impact sound of the metal members generated when the hammer member 40 is struck is disposed between the knocking head 51 and the support plate. The support plate 56 is fixed to the guide hole 52 with a screw member 55 such as a mounting bolt or a screw so as to be detachable. Is inserted into a dent for fixing and is not deformed, and assists in prolonging the life of the muffling member 54. A cylinder member 60 having a loose insertion hole 63 inserted and supported at the lower end of the knocking head 51 and concentric with the center line of the guide hole 52 is fixed by a fixing bolt 61. ing. The loose insertion hole 63 is a support hole 63a having a diameter that can be inserted on the knocking head side so that the center of the penetrating rod 7 coincides, and below the loose insertion hole 63, the penetrating rod 7 can be easily inserted. The guide hole 63b has a diameter larger than that of the knocking head. The connecting portion between the support hole 63a and the guide hole 63b has a tapered shape, and guides the insertion of the penetrating rod 7 from below.

  The cylinder member 60 has a stepped cylindrical shape whose upper part is approximately the same as the outer diameter of the knocking head 51 and whose lower part is smaller in diameter than the outer diameter. The portion is slidably guided through a sleeve 64 to a bearing member 62 fixed to a table 6 fixed to the elevator 4. A rubber plate 65 for noise reduction or a gasket for reducing metal noise generated when the stepped portion comes into contact with the bearing member 62 at a position of the bearing member 62 facing the stepped portion of the cylinder member 60. Is attached to the lower end of the cylinder member 60, and a retaining member 66 that moves integrally with the cylinder member 60 so as to prevent the cylinder member 60 from coming out of the lifting platform 4 is attached. That is, the amount of downward movement of the lifting platform 4 does not exceed the amount of movement of the cylinder member 60 that moves downward due to repeated hitting by the hammer member 40.

  Reference numeral 7 denotes a penetrating rod inserted into the cylinder member 60 from the lower end thereof. As shown in FIG. 6, the tip of the penetrating rod is pressed against the ground surface by hammering with the hammer member 40. A cone 8 penetrating therein is attached. The shaft portion 7b of the penetrating rod 7 has a female screw (not shown) at one end and a male screw 7a at the other end. The male screw 7a is sequentially screwed into the female screw of the shaft portion 7b having the same configuration. It is possible to add and extend.

  In such a configuration, in order to perform the penetration test, the penetration test machine 1 is installed at the test position, and the unit raising / lowering motor 11 is positively driven by the control unit (not shown) to raise the elevator 4. Next, the hammer operating motor 33 is driven so that the hammer side of the endless chain 32 is raised, and the hammer member 40 is raised to an appropriate position not in contact with the release member. Subsequently, the penetrating rod 7 is placed on the ground surface so that the center of the cone 8 is aligned with the center of the center hole 71 of the guide plate 70 attached to the stand 2, and the unit lifting / lowering motor 11 is reversely driven again to lift the lifting platform. The penetrating rod 7 is inserted into the loose insertion hole 63 of the cylinder member 60 while lowering 4. The penetrating rod 7 inserted into the cylinder member 60 comes into contact with the knocking head 51 when the lifting table 4 is lowered, and the knocking head 51 and the cylinder member 60 are stopped integrally, but the lifting table 4 continues. It descends and stops until it comes into contact with the retaining member 66 attached to the lower end of the cylinder member 60.

  Next, the hammer operating motor 33 is driven so that the hammer side of the endless chain 32 is lowered, and the hammer member 40 is lowered and placed on the knocking head 51. Then, this position is set in the control unit as the test origin (penetration amount 0 mm). When the start signal for starting the test is input after setting in this way, the penetrating rod 7 is subjected to a load due to the mass of the striking unit 20 or the like mounted on the lifting platform 4. Subsequently, as shown in FIG. 6, the hammer operation motor 33 is driven, and the endless chain 32 and the locking member are circulated and fed so as to rise integrally on the front side (hammer side). As a result, the locking member locks the hammer member 40 and rises integrally with the endless chain 32.

  In this way, when the hammer member 40 rises and reaches a predetermined position, the endless chain 32 and the hammer member 40 are unlocked by the release member attached in advance to the predetermined position, as shown in FIG. The hammer member 40 falls by its own weight along the guide member 34 and hits the knocking head 51. By this striking, the penetrating rod 7 penetrates into the ground. At this time, since the load due to the mass of the lifting platform 4 and the striking unit 20 is applied to the penetration rod 7 as described above, the penetration rod 7 penetrates the lifting platform 4 and the like as shown in FIG. Will follow and descend. Thereafter, the hammer member 40 hitting the knocking head 51 is again locked by the circularly moving locking member, and then rises again, and the hammer member 40 is repeatedly dropped by its own weight.

  In this way, the endless chain 32 and the engaging member are circulated and fed in parallel with the raising / lowering direction of the hammer member 40, so that the hammer member 40 repeatedly hits the knocking head 51, so that the penetration rod 7 penetrates into the ground. Is done. The hardness of the ground can be determined by measuring and calculating how many times the hammer member 40 has repeatedly struck against a predetermined amount of penetration depth.

  On the other hand, when the knocking head 51 is deformed or worn by this impact, the silencing member 54 of the knocking head 51 integrated with the cylinder member 60 is removed, and the four fixing bolts 61 are loosened to knock the knocking head 51. On the contrary, when the cylinder member 60 is worn, the fixing bolt 61 can be loosened to replace the cylinder member 60, and these members can be used without waste. In addition, since this testing machine is used outdoors and on land for development and residential land, mud, earth and sand, etc. may be caught between the penetration rod 7 inserted into the cylinder member 60 and the insertion hole 63. Even if the operator cannot remove the penetrating rod 7 from the cylinder member 60, as shown in FIG. 3, the silencing member 54 is removed from the guide hole 52 of the knocking head 51, and the long leg portion is pushed out. By screwing the bolt 9, the penetration rod 7 can be extruded and extracted, and the usability is also improved.

It is an enlarged partial sectional front view showing an embodiment of the invention. It is a principal part sectional front view of the present invention. It is principal part sectional drawing which shows the state which removed the silencing member and screwed the extrusion volt | bolt. It is operation | movement sectional drawing which shows the hit | damage start state which concerns on this invention. It is operation | movement sectional drawing which shows the falling state of this invention. It is a front side perspective view of a hit penetration tester. It is a back side perspective view of a hit penetration tester.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Impact penetration test machine 2 Stand 3 1st support | pillar 4 Lifting stand 5 Chain member 6 Table 7 Insertion rod 7a Male screw 7b Shaft part 8 Cone 9 Extrusion bolt 10 Base unit 11 Unit Lifting motor 20 Impact unit 30 Elevator unit 31 2nd support 32 Endless chain 33 Hammer operating motor 34 Guide member 40 Hammer member 50 Impact pressure receiving unit 51 Knocking head 52 Guide hole 53 Female screw 54 Silencer member 55 Screw member 56 Support plate 60 Cylinder member 61 Fixing bolt 62 Bearing member 63 Free insertion hole 63a Support hole 63b Guide hole 64 Sleeve 65 Rubber plate 66 Retaining member

Claims (2)

A hammer member (40) capable of moving up and down along the guide member (34) standing up, a penetrating rod (7) penetrating into the ground when struck by the hammer member, and supporting the penetrating rod, the hammer In an impact penetrating test machine having an impact pressure receiving unit (50) that directly receives an impact of a member ,
The impact pressure receiving unit is
A cylinder member (60) which is inserted and supported at the rear end of the penetrating rod and disposed at the dropping position of the hammer member ;
A knocking head (51) fixed to the end face of the cylinder member so as to be detachable and colliding with the hammer member ;
A female screw hole (53) drilled in the knocking head so as to communicate with the cylinder member and capable of extruding the penetrating rod by screwing an extrusion bolt (9);
A separable striking pressure receiving device characterized by comprising: 2. The separable impact pressure receiving device according to claim 1 , wherein a silencing member (54) is detachably fixed to a surface where the hammer member collides with the knocking head .

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