JP3660065B2 - Connecting device and connecting pin - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connecting device and a connecting pin used for the connecting device, and more particularly, to a connecting device used in a soil retaining device for excavating grooves that stands up along both sides of a trench to be excavated and settles as the trench is excavated to settle the trench. And a connection pin.
[0002]
[Prior art]
Such excavation ditch retaining devices are used in the ditch excavation method described in Japanese Patent Publication No. 55-30086, for example. This type of earth retaining device for excavation grooves is erected along both sides of the excavation groove, and includes a plurality of upper and lower earth retaining panels, a plate-like panel joint that vertically connects adjacent upper and lower earth retaining panels, and a groove width direction. It consists of a beam rod that resists earth pressure between the opposing earth retaining panels, and the panel joint is connected to the upper opening of the lower earth retaining panel adjacent to the upper and lower sides and the lower opening of the upper earth retaining panel. The lower end and the upper end are respectively inserted, the lower connection pin is inserted through the upper connection opening of the lower earth retaining panel and the lower end of the panel joint inside thereof, and the lower connection opening of the upper earth retaining panel and the interior thereof. An upper connection pin is inserted through the upper end of the panel joint.
[0003]
As the connecting pin for connecting the panel joint and the lower and upper earth retaining panels, a connecting pin is used which is composed of a head and a shaft, and a protrusion is locally formed at a position near the head on the outer periphery of the shaft. . The connecting pin is inserted into a pin insertion hole provided in the lower or upper earth retaining panel, and a cutout portion having a dimension to pass the protrusion is formed in a part of the outer periphery of the pin insertion hole. In order to perform the connection with the connection pin, first, in a rotating position where the protrusion of the connection pin coincides with the notch of the pin insertion hole, the connection pin is inserted into the pin insertion hole of the lower or upper earth retaining panel, It passes through the lower or upper insertion hole of the panel joint, and after the insertion is completed, the connecting pin is rotated so that the protrusion does not coincide with the pin insertion hole notch. As a result, the protrusion cannot pass through the notch, and the connecting pin cannot be removed.
[0004]
[Problems to be solved by the invention]
By the way, the earth retaining device for excavation grooves is given a downward pressing force, an impact force, etc. by a backhoe or the like for the purpose of sinking the earth retaining panel during excavation. In addition, vibration is often applied during work due to impact or the like. When such vibration is applied, the connecting pin rotates little by little, and the protrusion may accidentally coincide with the notch of the pin insertion hole. When such a state occurs, the connecting pin comes out of the pin insertion hole, and the connection between the earth retaining panels is broken, which is dangerous.
[0005]
It is an object of the present invention to obtain a connecting device and a connecting pin that can prevent the connecting pin from being pulled out due to vibration or the like, or coming out.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, a connecting pin is inserted into a pin insertion hole of a connected member, and another member is connected to the connected member by this connecting pin. A protrusion is locally formed on the outer periphery, and a notch having a dimension that allows the protrusion to pass through is formed on an upper portion of the peripheral edge of the pin insertion hole, and the protrusion is connected with the notch. After the pin is inserted into the insertion hole, by rotating the connecting pin, the positions of the protrusion and the notch portion do not match and the connecting pin cannot be removed. With respect to the circumference , the weight is unevenly distributed near the protrusion.
[0007]
The head of the connecting pin may have more meat near the protrusion .
[0008]
Also, the head of the connecting pin can also be made to protrude more radially outwardly by the projection closer.
[0009]
Further, the present invention is composed of a head and shank, the connecting pin projecting portion in a part of the outer periphery of the shaft portion is formed, the head, with respect to about the coupling pin axis, the projection closer Provided is a connecting pin configured to be unevenly distributed in weight.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows an assembled state of a earth retaining device for excavation grooves suitable for using the connecting device and the connecting pin of the present invention. This earth retaining device includes earth retaining panels P1, P2, and P3 that stand up along both sides of a trench to be excavated and perform earth retaining. The number of earth retaining panels is three on the upper and lower sides, but the number depends on the depth of the groove. In the illustrated earth retaining device, both side edges of the earth retaining panel are inserted into the guide rail G so as to be guided in the vertical direction, and the opposing guide rails G are connected to each other by the beam rod R. The rail G may be omitted, and the earth retaining panels facing in the groove width direction may be directly connected by the beam rod R.
[0011]
As the groove is excavated, the retaining panels erected along the both side walls of the groove are sequentially added upward to form the retaining walls on both sides of the groove. The earth pressure is supported by the beam rod R. As the groove deepens, the earth retaining panel sinks naturally or by applying a lower pressure, such as by a backhoe. When the excavation of the ditch is completed and the installation work of the buried object such as the sewer pipe is completed, the earth retaining device is pulled up by the crane for each unit length unit in the assembled state and temporarily placed on the ground.
[0012]
2 and 3 show the structure of the earth retaining panel P. FIG. Although the illustrated earth retaining panel P has a structure corresponding to the lowest panel P3 shown in FIG. 1, the earth retaining panel P may be the middle panel P2 in FIG. 1 or the uppermost panel P1. Also good. The earth retaining panel P shown in FIGS. 2 and 3 is shown by taking the lowermost panel P3 as an example, and the lower edge 2 has a sharp shape so as to easily enter the soil.
[0013]
In the earth retaining panel P, the groove member 3 is embedded in the vertical direction inside the both side edges, and the side edge member 4 is fixed in the vertical direction outside the groove member 3. The reinforcing plate 7 covering the surface of the grooved material 3 is provided with a known opening 5 used for fixing both ends of the beam rod R. Near the upper end of each groove member 3, an upper end connection opening 6 related to the main part of the present invention is provided. The middle and uppermost earth retaining panels P2 and P1 shown in FIG. 1 basically have the same structure as the earth retaining panel P of FIG. However, the middle earth retaining panel P2 is not sharpened at the lower end, has a lower end coupling opening similar to the coupling opening 6, and the highest earth retaining panel P1 is also basically the same as the middle earth retaining panel P2. In general. In addition, the height dimensions of these earth retaining panels P1, P2, and P3 are different as illustrated.
[0014]
FIG. 4 is an enlarged elevation view of the connecting portion of the middle retaining panel P2 and the lowest retaining panel P3. The configuration of FIG. 4 is exactly the same for the uppermost retaining panel P1 and the middle retaining panel P2. Therefore, in general, the retaining panel P2 is referred to as the upper retaining panel, and the retaining panel P3 is referred to as the upper retaining panel P3. This is called the lower earth retaining panel.
[0015]
In FIG. 4, the lower earth retaining panel P3 includes the groove member 3 and the side edge member 4 as described above. As shown in FIG. 5 which is a plan view of the lower earth retaining panel P3, the groove member 3 is a member having a U-shaped cross section, and the reinforcing plate 7 is fixed to the open side thereof by welding or the like. The upper end portion of the space surrounded by the reinforcing plate 7 is an upper end connection opening 6U. The side edge member 4 is fixed to the outer surface of the groove mold material 3. An enlarged guide portion 4a is formed on a part of the side edge member 4, and this enlarged guide portion 4a serves as a guided portion when the earth retaining panel slides in the vertical direction within the guide rail G shown in FIG. . As described above, the guide rail G is not essential. As is well known, steel plates 8 and 9 are applied to the inner and outer surfaces of the earth retaining panel P3.
[0016]
A hook-like connecting pin insertion hole 11 is formed in a portion of the reinforcing plate 7 that forms the upper end connecting opening 6U of the lower earth retaining panel P3. The connecting pin insertion hole 11 is a hole for inserting a connecting pin, which will be described later, which forms a main part of the present invention. The connecting pin insertion hole 11 basically has a circular shape, and a part of the periphery of the circular hole, for example, an upper portion of the periphery 12 is formed. Further, a rectangular plate-shaped reinforcing member 13 is fixed to the inside of the bottom of the groove member 3 by welding or the like as shown in FIGS. 4 and 5, and the connecting pin insertion hole is formed in the groove member bottom and the reinforcing member 13. 11 is formed with a connecting pin insertion hole 15 coaxial with the same diameter. A block-like support protrusion 17 is fixed to the inner surface of the reinforcing plate 7 above the connecting pin insertion hole 11 by welding or the like. As can be seen from FIG. 4, the protrusion 17 is provided slightly below the upper edge of the earth retaining panel P3.
[0017]
Similarly, the upper earth retaining panel P2 also has a vertical groove 13 inside, and when the upper earth retaining panel P2 is stacked on the lower earth retaining panel P3 in a predetermined position, the groove members 3 of both panels P2 and P3 are arranged together. Are aligned in the vertical direction. The open side of the grooved material 3 of the upper earth retaining panel P2 is closed by the reinforcing plate 7 as in the case of the lower earth retaining panel P3, and the lower end of the space surrounded by the grooved material 3 and the reinforcing plate 7 is the lower end. A connecting opening 6L is formed. When the upper earth retaining panel P2 is placed on the lower earth retaining panel P3 at a predetermined position, the upper end and lower end connecting openings 6L and 6U are aligned vertically. A connecting pin insertion hole 19 is formed through the lower end connecting opening 6L in the lateral direction.
[0018]
FIG. 6 shows a longitudinal sectional view in a state where the upper earth retaining panel P2 and the lower earth retaining panel P3 shown in FIG. As is clear from FIG. 6, the block-shaped support protrusion 17 is located above the connecting pin insertion hole 11. Further, a connection pin insertion hole 20 having the same diameter as that of the connection pin insertion hole 19 of the reinforcing plate 7 of the upper earth retaining panel P2 is formed. The connecting pin insertion hole 20 is formed across the bottom portion of the groove member 3 and the plate-like reinforcing member 21 fixed to the inner surface thereof.
[0019]
A block-like restraining member 23 is fixed to the inner surface of the reinforcing plate 7 by welding or the like below the connecting pin insertion hole 11 of the lower earth retaining panel P3. Further, block-like restraining members 24 and 25 are fixed to the inner surface of the reinforcing plate 7 by welding or the like at positions above and below the connecting pin insertion hole 19 of the upper earth retaining panel P2. These restraining members 23, 24, and 25 have the same thickness as the block-shaped protrusions 17, and therefore the surfaces of these members 17, 23, 24, and 25 are in the same plane. The surfaces of the reinforcing members 13 and 21 are also in the same plane, and these two planes are parallel to each other. The distance between these two planes substantially corresponds to the thickness of the panel joint to be described.
[0020]
The panel joint is a member for connecting the upper and lower earth retaining panels P2, P3 in the vertical direction, and is indicated by the symbol J in FIGS. 7, 8, 9 and 10. The panel joint J has a main body 30 having a plate shape. Tapered portions 31 are formed so that the upper and lower ends of the main body 30 are tapered. A pin 32 is embedded in the center of the main body 30 so as to penetrate therethrough. Further, connecting pin insertion holes 33 and 33 are formed above and below the pin 32. Further, end plates 35 and 35 having a lateral width larger than the thickness of the main body 30 are fixed to both side edges of the main body 30 by welding or the like. As is apparent from the figure, the height dimension of the end plates 35, 35 is equal to the distance between the axes of the connecting pin insertion holes 33, 33, and the end plates are provided only over the region of the distance between the axes.
[0021]
As shown in FIGS. 11, 12 and 13, the panel joint J is mounted in the upper end connection opening 6U of the lower earth retaining panel P3. When the panel joint J is mounted, the pin 32 projecting to the intermediate portion abuts against the upper surface of the reinforcing member 13 and the support projection 17 as shown in FIGS. 11 and 13, and the panel joint J is inserted further downward. The upper half of the panel joint J protrudes above the lower earth retaining panel P3. Next, the connection pin 40 is inserted into the connection pin insertion hole 11 of the lower earth retaining panel P3, the connection pin insertion hole 33 of the lower half of the panel joint J, and the connection pin insertion hole 15 (FIG. 6) of the lower earth retention panel P3. . The connecting pin 40 is shown as a conventionally used connecting pin in FIGS. The connecting pin 40 is a feature of the present invention, and details thereof will be described later. The insertion state of the connecting pin 40 is as shown in FIGS. The front end 40a of the connecting pin 40 slightly protrudes to the opposite side of the earth retaining panel P3, and the panel joint J whose planar shape forms an H shape almost occupies the entire cross-sectional space in the upper end connecting opening 6U. 11 and 12 show a case where the guide rail G is used.
[0022]
One embodiment of the connecting pin 40 forming the main part of the present invention is shown in FIGS. The connecting pin 40 includes a cylindrical shaft portion 41 and an enlarged head portion 42 thereof, and a protrusion 43 that protrudes outward in the radial direction is integrally provided on the outer surface near the head portion of the shaft portion 41. An arc-shaped handle 44 is attached to the head 42. Both ends 44a of the handle 44 are bent and inserted into the diametrically opposed holes of the head 42. Therefore, the handle 44 can be rotated around the bent ends 44a as shown in FIG. it can.
[0023]
As shown in FIG. 15, for example, three radially outward protruding portions 45 a, 45 b, 45 c are formed on the peripheral surface of the head portion 42 of the connecting pin 40. These raised portions are for easily grasping and rotating the head 42 by hand. Among them, the raised portions 45a and 45b in the same angle region as the projection 43 around the connecting pin axis are other It protrudes more outward in the radial direction than the raised portion 45c, and if necessary, the circumferential width is formed to be larger than the raised portion 45c. As a result, the weight of the head 42 is unevenly distributed in the vicinity of the protrusion 43, and the center of gravity of the head 42 is unevenly distributed closer to the protrusion 43 than the position of the axis 41 a of the shaft 41. Note that the angular positions of the raised portions 45a and 45b only need to be close to the angular position of the protrusion 43. Furthermore, the flesh of the head 42 itself can be made thicker in the radial direction as shown in the drawing. Further, the handle 44 can be omitted. In addition, 47 is a notch formed in the periphery of the head 42 and serves as a mark of a position where the protrusion 43 is present.
[0024]
17 and 18 show another embodiment of the connecting pin 40. In this embodiment, a ridge 46 is formed on the surface of the head portion 42 in the left-right direction with the protrusion 43 as a center. In this embodiment, the center 42 a of the substantially circular head 42 is eccentric to the protrusion 43 side with respect to the center 41 a of the shaft portion 41. The ridge 46 is generally provided closer to the protrusion 43 than the position of the axis 41 a of the shaft 41. As described above, due to the eccentricity of the head 42 and the raised ridge 46, the center of gravity of the head 42 is unevenly distributed closer to the protrusion 43 than the position where the axis 41a is located. Reference numeral 47 denotes a mark notch.
[0025]
19 and 20 show still another embodiment of the connecting pin 40. This embodiment is different from the embodiment shown in FIGS. 17 and 18 only in that a raised ridge 48 to be put on when turning is provided in a direction perpendicular to the raised ridge 46. Other points are denoted by the same reference numerals as those in FIGS. 17 and 18, and the description thereof is omitted. In this embodiment, the vertical ridges 48 are longer on the side of the protrusion 43 with respect to the axis 41a of the shaft part 41, so that the center of gravity of the head 42 is unevenly distributed on the protrusion 43 side. Reference numeral 47 denotes a mark notch.
[0026]
In the embodiment shown in FIGS. 21 and 22, the raised ridges 41 and 48 on the surface of the head 42 correspond to a combination of both the raised ridges of FIGS. 18 and 20 and have a cross shape. . And also in this embodiment, it is clear that the weight of the head 42 is unevenly distributed near the protrusion 43 similarly to the said embodiment.
[0027]
In addition to the embodiments described above, there are innumerable designs in which the weight or center of gravity of the head 42 is unevenly distributed near the protrusion 43. For example, an eccentric head 42 having no ridge or radial ridge as shown in FIG. 23 may be used, or the eccentric head 42 may be rectangular as shown in FIG.
[0028]
In order to mount the connecting pin 40 as shown in FIG. 11 to FIG. 13, the shaft portion 41 of the connecting pin 40 is first passed through the keyhole-shaped connecting pin insertion hole 11. 43 is aligned with the notch 12 (FIG. 4) of the connecting pin insertion hole 11, and the connecting pin 40 is pushed forward with the protrusion 43 passing through the notch 12. If the connecting pin 40 is rotated when the projection 43 has passed through the cutout portion 12, the projection 43 will not align with the cutout portion 12, so that the connection pin 40 cannot be pulled out. An example of such a state is as shown in FIG. In this state, the protrusion 43 is at a downward position that is 180 degrees out of phase with the notch 12, and the tip of the shaft 41 is inserted into the reinforcing member 13 and the insertion hole 15 of the channel member 3. As a result, the panel joint J protrudes upward in a state where it does not escape upward from the lower earth retaining panel P3.
[0029]
As shown in FIG. 11, the upper earth retaining panel P2 is placed as shown by the phantom line in FIG. 23 on the upper side of the lower earth retaining panel P3 in which the upper half of the panel joint J protrudes upward. It is connected to the lower earth retaining panel P3. As shown in FIG. 23, the upper earth retaining panel P2 is placed on the lower earth retaining panel P3 so that the lower end connection opening 6L of the upper earth retaining panel P2 fits into the upper half of the panel joint J protruding upward.
[0030]
At this time, the upper half part of the panel joint J enters between the reinforcing member 21 and the block-like protrusions 24 and 25 inside the lower end connection opening 6L with a slight gap. At this time, the panel joint J has a function of rotating a little around the connecting pin 41 to easily fit in the lower end connecting opening 6L. In this state, when the connecting pin 50 is inserted from the left side to the right side in FIG. 23 through the connecting pin insertion hole 19 of the reinforcing plate 7 and the connecting pin insertion hole 20 of the reinforcing member 21, the connecting pin 50 is connected to the panel joint J. Through the upper connecting pin insertion hole 33, the upper earth retaining panel P2 is connected to the lower earth retaining panel P3 via the panel joint J. The connecting pin 50 has a head 51, and the head 51 abuts on the surface of the reinforcing plate 7. The connecting pin 50 has the same structure as the connecting pin 40 and has a protrusion 53 at a position near the head 51. In order to facilitate the assembly of the upper earth retaining panel P2, it is desirable to provide an appropriate gap between the connecting pin 50 and the hole through which the connecting pin 50 is inserted to provide a dimensional allowance.
[0031]
As shown in FIG. 25, the upper and lower earth retaining panels are connected by the connecting pins 40 and 50 through the panel joint J. The earth retaining device connected and assembled in this way is used by the backhoe during the trench excavation. It is often hit or received an impact when it is lifted and placed on the ground after the installation of buried objects after excavation of the trench is completed. The vibration at this time is naturally transmitted to the connecting portion, and as shown in FIG. 25, the connecting pins 40, 50 having the protrusions 43, 53 at the position facing downward or close thereto are easily rotated by receiving the vibration. When the protrusions 43 and 53 of the connecting pins 40 and 50 return to the same rotational position as that when the connecting pins are inserted due to this vibration, the protruding parts 43 and 53 cause the notches 12 and 20 of the connecting pin insertion holes 11 and 19 to move. There is a risk that the connecting pins 40 and 50 may pass through to the left in FIG.
[0032]
By using the connecting pin 40 according to the present invention shown in FIGS. 14 to 24, the above-mentioned problems are eliminated. That is, since the weight or center of gravity of the head 42 of the connecting pin 40 is unevenly distributed closer to the protrusion 43, the uneven distribution of the weight including the protrusion 43 is applied to the connecting pin 40 due to the uneven distribution of the weight. The connecting pin rotates so that goes to the lower side. Therefore, there is no possibility that the protrusion 43 (53) located above matches the position of the notch 12 (20), and it is possible to completely prevent the connecting pin from being released from the inserted state.
[0033]
In addition, although this invention was demonstrated as what was used for the connection of the earth retaining panel of the earth retaining device for trench excavation, this invention can be used for the connection of to-be-connected members in civil engineering equipment and other arbitrary technical fields.
[0034]
【The invention's effect】
As described above, in the present invention, the connection pin has a weight that is unevenly distributed near the projection of the shaft portion around the shaft portion, so that the connection pin is subjected to the effect of the uneven weight as it receives vibration. The protrusion has a habit of turning downward so that the position of the protrusion does not coincide with the position of the notch in the upper peripheral edge of the connection pin insertion hole, and the connection pin can be prevented from escaping. .
[Brief description of the drawings]
FIG. 1 is a perspective view of an excavation groove earth retaining device using a connecting device and a connecting pin according to the present invention.
FIG. 2 is an elevation view showing an example of the earth retaining panel shown in FIG. 1;
FIG. 3 is a side view of FIG. 2;
FIG. 4 is an enlarged elevation view showing a joint portion between an upper earth retaining panel and a lower earth retaining panel.
5 is a plan view of the lower earth retaining panel of FIG. 4. FIG.
6 is a cross-sectional view taken along line 6-6 of FIG. 4 showing the internal structure of the upper and lower earth retaining panels.
FIG. 7 is an elevation view of the panel joint.
8 is a cross-sectional view taken along line 8-8 in FIG.
9 is a side view of FIG. 7. FIG.
10 is a plan view of FIG. 7. FIG.
FIG. 11 is an elevational view of a state in which the lower half of the panel joint is mounted in the upper end connection opening of the lower earth retaining panel.
12 is a plan view of FIG. 11. FIG.
13 is a longitudinal sectional view of FIG.
FIG. 14 is an elevational view of one embodiment of a connecting pin according to the present invention.
15 is a right side view of FIG.
16 is a sectional view taken along line 16-16 in FIG. 14;
FIG. 17 is an elevational view of another embodiment of a connecting pin according to the present invention.
18 is a right side view of FIG.
FIG. 19 is an elevational view of yet another embodiment of a connecting pin according to the present invention.
20 is a right side view of FIG. 19. FIG.
FIG. 21 is an elevational view of still another embodiment of a connecting pin according to the present invention.
22 is a right side view of FIG. 21. FIG.
FIG. 23 is a side view of another embodiment of a connecting pin according to the present invention.
FIG. 24 is a side view of another embodiment of a connecting pin according to the present invention.
FIG. 25 is a longitudinal sectional view showing a state in which a lower earth retaining panel and an upper earth retaining panel are connected by a panel joint.
[Explanation of symbols]
P1 earth retaining panel P2 earth retaining panel (upper earth retaining panel)
P3 earth retaining panel (lower earth retaining panel)
J Panel joint R Beam rod 6U Upper end connection opening 6L Lower end connection opening 7 Reinforcement plate 11 Connection pin insertion hole 12 Notch 13 Plate-like reinforcing material 15 Connection pin insertion hole 17 Supporting protrusion 19 Connection pin insertion hole 20 Connection pin Insertion hole 21 Plate-like reinforcing member 23 Restraining member 30 Main body 32 of panel joint J Pin 33 Connection pin insertion hole 35 End plate 40 Connection pin 41 Axis 41a Axis 42 of axis 41 Head 43 Projection 45a, 45b Protrusion 46 Raised ridge 47 Marking notch 48 Raised ridge 50 Connecting pin 51 Head 53 Projection

Claims (4)

A connecting pin is inserted into the pin insertion hole of the connected member, and the connecting pin is configured to connect another member to the connected member by this connecting pin, and a protrusion is locally formed on the outer periphery of the connecting pin. A notch having a dimension that allows the protrusion to pass therethrough is formed at the upper part of the peripheral edge of the pin insertion hole, and after inserting the connecting pin into the insertion hole with the protrusion matching the notch, the connecting pin is By rotating, the position of the protrusion and the notch does not match, and the connecting device that the connecting pin does not come off,
Coupling device head of the connecting pin, with respect to about connecting pin axis, characterized in that the weight to the projection closer is configured unevenly. The connecting device according to claim 1, wherein a head portion of the connecting pin has more meat near the protrusion . The coupling device according to claim 1, wherein a head of the coupling pin protrudes more radially outward than the protrusion. Consists of a head and shank, the connecting pin projecting portion in a part of the outer periphery of the shaft portion is formed, so that the head, with respect to about the coupling pin axis, the weight is unevenly distributed on the projection closer A connecting pin characterized in that it is configured.

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