JP2007008545A - Spacer connecting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spacer connecting structure that ensures connecting strength and improves durability. <P>SOLUTION: First to third connecting shafts 18 to 20 are formed on the upper face of the first end 12a of a first spacer 11A. First to third engagement parts 36 to 38 corresponding to the first to third connecting shafts 18 to 20 are formed on the second end 12b of the second spacer 11B. With the first connecting shaft 18 inserted in the insertion hole 40 of the first engagement part 36, the second spacer 11b is rotated counterclockwise around the body 21 of the first connecting shaft 18. Then, the second engagement part 37 and third engagement part 38 are engaged with the second connecting shaft 19 and the third connecting shaft 20 respectively. Since the second end 12b is connected to the first end 12a in three parts by two operations, the connecting strength can be ensured. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a spacer that is interposed between concrete products to maintain the space between the products and prevent mutual contact.

  Conventionally, for example, when storing a concrete product in the middle of curing, a spacer having a long and narrow plate shape formed by extruding a resin material between stacked concrete products is appropriately cut according to the size of the concrete product. However, there is something that is interposed between the products.

The above-mentioned resin spacers have to be cut to an appropriate length, which is troublesome, needs to be transported and stored for a long time, and the handling thereof is inconvenient.
Furthermore, since the resin spacer is in contact with the concrete product on the front and back surfaces, the contact area with the product is increased. Accordingly, the concrete at the contact portion is difficult to touch the air, which hinders concrete curing.

In order to solve the above problems, a spacer shown in Patent Document 1 has been proposed. One end of this spacer is provided with a connected portion comprising a plate-like body and an engaging convex portion, and the other end is a hollow portion into which the plate-like body of the connected portion formed at the end of another spacer can be inserted. And a connected portion provided with an engaging hole capable of locking the engaging convex portion. And it connects by connecting the to-be-connected part of two spacers so that it may face each other in the longitudinal direction.
Japanese Patent No. 3007028

  However, the conventional spacer can connect the spacers with one touch, but because of the structure in which a plate-like body formed on the end surface of another spacer is inserted into the hollow portion formed on the end surface of the spacer, It is difficult to ensure the connection strength, and the base end portion of the plate-like body is subjected to a localized concentrated load in a state where the spacer is cantilevered.

  An object of the present invention is to provide a spacer connection structure capable of solving the above-described problems in the prior art and ensuring the connection strength and improving the durability.

  In order to solve the above-mentioned problem, the invention according to claim 1 is similar to the first end portion of the first strip-shaped spacer that is interposed between the concrete products to maintain the product interval. In the connection structure for connecting the second end portions of the strip-shaped second spacer, the first connection portion is provided at the first end portion, and the second connection is connected to the first connection means with respect to the second end portion. The first connecting means and the second connecting means include a first operation for bringing the first end and the second end into contact with each other, and the first end and the second connecting in a direction different from the first operation. The gist is that the two end portions are connected by the second operation of moving the two end portions.

  According to a second aspect of the present invention, in the first aspect, the first connecting means and the second connecting means intersect the first end portion when the second end portion is viewed from the plate thickness direction. The gist is that the two ends are brought into contact with each other by the first operation in a state of being connected, and then connected by the second operation in which both ends are rotated in series.

  According to a third aspect of the present invention, in the first aspect, the first connecting means and the second connecting means are in series with the first end when the second end is viewed from the plate thickness direction. In this state, both ends are brought into contact with each other by a first operation, and then the two ends are connected by a second operation in which the both ends are moved in the longitudinal direction of the spacer while being in series.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, the first connecting means includes a connecting shaft that is erected on the upper surface of the first end portion, and a side protruding from the upper end portion of the connecting shaft. The second connecting means is formed at the second end, and an insertion passage for inserting the connecting shaft and the locking protrusion in the plate thickness direction in the first operation; and The gist of the present invention is that it is formed by a locking step portion for locking the locking protrusion formed in the upper opening of the insertion passage and rotated in the second operation.

  According to a fifth aspect of the present invention, in the fourth aspect, an auxiliary connection shaft is erected on a top surface of the first end portion at a position away from the connection shaft by a predetermined distance. The locking projection protrudes laterally, the second end has an engaging recess that is engaged with the auxiliary connecting shaft in the second operation, and a locking step for locking the locking projection. A gist is that a pair of pull-out preventing protrusions are formed on the entrance side of the engaging recess and are opposed to each other at an interval smaller than the diameter dimension of the auxiliary connecting shaft.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the auxiliary connecting shaft provided with the locking projection, the engaging recess, the slip-out preventing protruding portion, and the locking stepped portion are provided at two locations, respectively. This is the gist.

  The invention according to claim 7 is the invention according to claim 3, wherein the first connecting means is constituted by a connecting tongue piece provided in a lateral L shape when viewed from the side with respect to the upper surface of the first end. The second connecting means is configured by an entry passage that enters the connecting tongue piece in the first operation with respect to the second end portion, and a locking step portion that locks the connecting tongue piece in the second operation. The gist is that a protrusion prevention protrusion and a protrusion prevention recess are provided between the tongue piece and the locking step.

  The invention according to claim 8 is the invention according to claim 3, wherein the first connecting means includes a plurality of connecting shafts erected on the upper surface of the first end portion, and a latch formed at the upper end portion of each connecting tool. The second connecting means is formed in the first operation with a plurality of large-diameter through holes that penetrate the locking flanges in the first operation, and in the vicinity of the through holes. And a pair of pull-out preventing protrusions that are opposed to each other at an interval smaller than the diameter dimension of the connecting shaft. This is the gist.

  In the invention according to any one of claims 1 to 8, the second connecting means at the second end is connected to the first connecting means at the first end by the first action and the second action. Therefore, compared to the structure in which a plate-shaped body formed on the end surface of another spacer is inserted into the hollow portion formed on the end surface of the conventional spacer, the connection strength at both ends is ensured and durable. Can be improved.

Hereinafter, an embodiment of a spacer connection structure embodying the present invention will be described with reference to FIGS.
The first spacer 11A shown in FIG. 7 includes a strip-shaped spacer body 12 integrally formed of a synthetic resin material, and a first end 12a (right end portion in FIG. 7) formed on the spacer body 12. The connecting means 13 and the second connecting means 14 formed at the second end 12b (left end in FIG. 7) are integrally configured. The second spacer 11B is configured in the same manner as the first spacer 11A, and the second connecting means of the second end 12b of the second spacer 11B is different from the first connecting means 13 of the first end 12a of the first spacer 11A. By connecting 14, a spacer link body R 1 having a desired length is obtained. Then, as shown in FIG. 9, the spacer connection body R <b> 1 is interposed between the stacked concrete products S so that a constant interval is maintained between the products S.

The spacer body 12 has a narrow strip shape as shown in FIG. 7, and protrusions 15 are formed at a plurality of locations on both the front and back surfaces as shown in FIG.
Next, based on FIG. 3, the 1st connection means 13 formed in the 1st end part 12a of the spacer main body 12 of the said 1st spacer 11A is demonstrated.

  A bulging portion 17 is integrally formed at a central portion in the longitudinal direction of the first end portion 12a. A first connecting shaft 18 is integrally formed on the upper surface of the central portion of the bulging portion 17, and the second connecting shaft 19 and the third connecting shaft 18 are separated from the connecting shaft 18 by a predetermined distance in the longitudinal direction of the first end portion 12 a. The connecting shaft 20 is integrally formed. The first connecting shaft 18 includes a shaft main body 21 erected upward on the upper surface of the bulging portion 17, a side portion integrally with an upper end outer peripheral portion of the shaft main body 21, and a spacer main body 12. It is comprised by a pair of latching protrusions 22 and 23 projected and formed in the direction orthogonal to a longitudinal direction. A through hole 24 is formed in the bulging portion 17 of the first end portion 12a so as to correspond to the locking projections 22 and 23 of the shaft body 21 in the vertical direction. The second connecting shaft 19 is integrally formed with a shaft main body 26 erected on the upper surface of the first end portion 12 a and an upper end outer peripheral portion of the shaft main body 26 so as to be oriented in the longitudinal direction of the spacer main body 12. And a pair of locking projections 27 and 28. A through hole 29 is formed in the first end portion 12a so as to correspond to the locking projections 27 and 28 in the vertical direction. Similar to the second connecting shaft 19, the third connecting shaft 20 includes a shaft body 30 and a pair of locking projections 31 and 32. A through hole 33 is formed in the first end portion 12a so as to correspond to the locking projections 31 and 32 in the vertical direction. The through holes 24, 29, and 33 are formed by insert members during molding.

In this embodiment, the 1st connection means 13 is comprised by the said 1st-3rd connection shafts 18-20.
Next, based on FIG. 4, the 2nd connection means 14 provided in the 2nd end part 12b of the spacer main body 12 of the said 2nd spacer 11B is demonstrated.

  The second end portion 12b is set to a thickness dimension larger than the plate thickness dimension of the spacer main body 12, and the first coupling shaft 18 of the first coupling means 13 is engaged with the central portion in the longitudinal direction. A first engagement portion 36 is formed. A second engaging portion 37 that engages the second connecting shaft 19 is formed at the distal end of the second end 12b, and the third connecting shaft 20 is formed at the base end of the second end 12b. A third engaging portion 38 is formed to engage. Therefore, the first to third engaging portions 36 to 38 will be sequentially described.

  As shown in FIG. 3, the first engaging portion 36 includes the shaft main body 21 and the locking protrusion of the first connecting shaft 18 in a state where the second spacer 11 </ b> B is orthogonal to the first spacer 11 </ b> A when viewed from above. The insertion holes 40 and 23 are inserted in the thickness direction of the second end portion 12b, and formed on both sides of the upper opening of the insertion hole 40, and locked by the lower surfaces of the locking projections 22 and 23. The locking step portions 41 and 42 and position restricting surfaces 43 and 44 for restricting the position of one side surface of the locking protrusions 22 and 23 are configured. The second engagement portion 37 includes an engagement recess 45 that can engage the shaft body 26 of the second connection shaft 19 of the first connection means 13 from the side, and an opening side of the engagement recess 45. A pair of formed protrusion prevention protrusions 46, and notches are formed above the engagement recesses 45 and the protrusion prevention protrusions 46, and are engaged with the lower surfaces of the engagement protrusions 27 and 28 of the second connecting shaft 19. It is comprised by a pair of latching step parts 47 and 48. The third engagement portion 38 is formed on the opening side of the engagement recess 51 and an engagement recess 51 that can engage the shaft body 30 of the third connection shaft 20 of the first connection means 13 from the side. The pair of pull-out prevention protrusions 52 are formed in a notch above the engaging recess 51 and the drop-out prevention protrusion 52 and are locked to the lower surfaces of the locking protrusions 31 and 32 of the third connecting shaft 20. It is comprised by a pair of latching step part 53,54.

  As shown in FIG. 3, the distance W between the protrusions 46 and 52 (only the side of the protrusion 52 is shown) is the diameter D of the shaft bodies 26 and 30 (only the side of the shaft 26 is shown). It is formed slightly smaller than the dimensions. When the shaft bodies 26, 30 are engaged with the engagement recesses 45, 51, the connecting portions 12c (see FIG. 4) at the inner back of the engagement recesses 45, 51 are elastically deformed to prevent the protrusions from slipping out. The shaft main bodies 26 and 30 are prevented from detaching in a state where the shaft main bodies 26 and 30 are engaged with the engaging recesses 45 and 51 by displacing the 46 and 52 in the separating direction.

Next, a method of connecting the first and second spacers 11A and 11B configured as described above in series will be described.
As shown in FIGS. 1 and 3, the first spacer 11A is held by one hand, and the second end 12b of the second spacer 11B held by the other hand is upward with respect to the first end 12a. In the state orthogonal to each other, the first connecting shaft 18 of the first connecting means 13 is made to correspond to the insertion hole 40 of the first engaging portion 36 of the second connecting means 14. In this state, in the first operation indicated by the arrow P in FIG. 3 in which the upper surface of the first end portion 12a is brought into contact with the lower surface of the second end portion 12b, the shaft main body 21 of the first connecting shaft 18 and the locking protrusions 22 and 23. Is inserted into the insertion hole 40 of the first engaging portion 36.

  Next, the second engaging portion 37 and the third spacer 11B are moved by a second operation (see the Q arrow) in which the second spacer 11B is rotated counterclockwise around the shaft main body 21 of the first connecting shaft 18 in FIG. The engaging portion 38 is moved in the horizontal direction toward the second connecting shaft 19 and the third connecting shaft 20. Further, the pull-out prevention protrusion 46 of the second engagement part 37 and the drop-out prevention protrusion 52 of the third engagement part 38 are in contact with the outer peripheral surfaces of the shaft bodies 26 and 30, and are further rotated with a strong force. When operated, the slip-out preventing projections 46 and 52 are moved over the outer peripheral surfaces of the shaft bodies 26 and 30, and the shaft bodies 26 and 30 are engaged with the engagement recesses 45 and 51. Further, the locking step portions 47 and 48 are locked to the locking projections 27 and 28, and the locking step portions 53 and 54 are moved to positions where they are locked to the locking projections 31 and 32, as shown in FIG. The first and second spacers 11A and 11B are connected in series. In this state, the locking step portions 41 and 42 are moved to positions where they are locked to the lower surfaces of the locking protrusions 22 and 23 of the first connecting shaft 18.

According to the spacer connection structure of the above embodiment, the following effects can be obtained.
(1) In the above embodiment, as shown in FIG. 3, the first to third connecting shafts 18 to 20 are provided on the upper surface of the first end portion 12a of the spacer main body 12 of the first spacer 11A. As shown in FIG. 1, first to third engaging portions 36 to 38 are provided at the second end portion 12 b of the spacer body 12 of the second spacer 11 </ b> B, and as shown in FIG. In the first operation in which the first engagement portion 36 of the second connecting means 14 is made to correspond to the shaft 18 and the first end portion 12a and the second end portion 12b are close to each other in the orthogonal state, the first engagement portion 36 is used. The shaft main body 21 and the locking protrusions 22 and 23 of the first connecting shaft 18 are engaged with the insertion hole 40. Further, in the second operation of rotating the second end 12b around the shaft main body 21 of the first connecting shaft 18, the second engaging portion with respect to the second connecting shaft 19 and the third connecting shaft 20 is provided. 37 and the third engaging portion 38 are engaged. For this reason, the 1st connection means 13 and the 2nd connection means 14 can be firmly connected by the 1st operation and the 2nd operation.

  (2) In the above embodiment, the protrusions 46 and 52 are formed at the openings of the engaging recesses 45 and 51 so as to get over the shaft bodies 26 and 30, so that the shaft bodies 26 and 30 and the locking protrusions 27, 28, 31, 32 and the engagement recesses 45, 51 are engaged. For this reason, the connection state of the 1st connection means 13 and the 2nd connection means 14 can be hold | maintained stably.

  (3) In the above embodiment, as described above, the first end portion 12a of the first spacer 11A and the second end portion 12b of the second spacer 11B can be connected at three locations, so that the connection strength is improved. can do.

In addition, you may change this embodiment as follows.
As shown in FIGS. 10 and 11, horizontal L-shaped connecting tongue pieces 61, 61 are provided on the upper surface of the first end portion 12 a of the first spacer 11 </ b> A, and on the lower surface of the distal end portion of the connecting tongue pieces 61, 61. Locking claws 62, 62 are provided. On the other hand, the connection tongue pieces 61, 61 are provided in the second end portion 12b, and insertion holes 63, 63 for inserting the connection tongue pieces 61, 61 from below by the first operation (see arrow P) are provided on the inner peripheral side of the insertion holes 63, 63. The connecting tongue pieces 61, 61 may be elastically deformed by a second movement (refer to the Q arrow) that moves in the horizontal direction to provide a slip-out preventing recesses 64, 64 for locking the locking claws 62, 62. A slope 65 that guides the locking claw 62 is formed on the entrance side of the escape preventing recess 64.

  As shown in FIG. 12, horizontal L-shaped connecting tongues 71 and 72 are provided on the upper surface of the first end 12a, and locking projections 75 and 75 are provided on the lower surfaces of the distal end portions of the connecting tongues 71 and 72. . On the other hand, the connecting tongue pieces 71 and 72 are provided in the second end portion 12b, and insertion holes 73 and 74 are inserted from below by the first operation (see arrow P), and are spaced apart from the insertion holes 73 and 74 in the horizontal direction. The connecting tongue pieces 71 and 72 may be elastically deformed by the second operation (see the Q arrow) at the position where they are provided, and the slip-out preventing recesses 76 and 76 for locking the locking projections 75 and 75 may be provided.

  As shown in FIG. 13, two connecting shafts 81 and 81 having locking flanges 81a and 81a as first connecting means are provided upright on the upper surface of the first end 12a. A plurality of large-diameter through-holes 83 and 84 through which the respective engaging flanges 81a and 81a penetrate are provided as second connection means for the second end portion 12b. Lock holes 85 and 86 having a smaller diameter than the lock flanges 81a and 81a are provided in the vicinity of the through holes 83 and 84. At the boundary between the through holes 83 and 84 and the locking holes 85 and 86, escape prevention protrusions 87 and 88 smaller than the diameter dimension of the connecting shafts 81 and 81 are formed. And in the 1st operation (refer arrow P) which makes the 2nd end part 12b contact the 1st end part 12a, locking flange 81a and 81a are penetrated to penetration holes 83 and 84, and 1st end part 12a and 2nd In the second operation (refer to the arrow Q) for moving the end 12b in the horizontal direction, the connecting shafts 81 and 81 are engaged with the locking holes 85 and 86, and the first and second ends 12a and 12b are connected.

  As shown in FIG. 14, the connecting tongue piece 61, the locking claw 62, the insertion hole 63, and the withdrawal prevention recessed portion 64 are directed to one place, and enter between the upper surface of the first end 12 a and the connecting tongue piece 61. The holding plate portion 91 may be formed.

Although not shown, a large number of dot-like protrusions may be provided on the front and back surfaces of the spacer body 12.
In the embodiment shown in FIG. 1, the second connecting shaft 19, the second engaging portion 37 or the third connecting shaft 20, and the third engaging portion 38 may be omitted.

  In the embodiment shown in FIG. 1, although not shown, the second connecting shaft 19, the second engaging portion 37, the third connecting shaft 20, and the third engaging portion 38 are omitted, and the first connecting shaft 18 A slip-out preventing means may be provided between the shaft main body 21 and the locking projection 23 and the locking step portions 41 and 42 of the first engaging portion 36.

The partial top view before the connection which shows one Embodiment of the spacer of this invention. The partial top view after the connection of a spacer. The expansion perspective view which shows the 1st connection means of a 1st spacer, and the 2nd connection means of a 2nd spacer. The expansion perspective view which shows the 2nd connection means of a 2nd spacer. The longitudinal cross-sectional view before the connection which shows a 1st connection means and a 2nd connection means. The longitudinal cross-sectional view after the connection which shows a 1st connection means and a 2nd connection means. The partial omission plan view showing the 1st spacer and the 2nd spacer. FIG. 3 is a partially omitted front view of the first spacer. The front view which shows the use condition of a 1st spacer and a 2nd spacer. The separation perspective view of the 1st spacer and the 2nd spacer which show another embodiment of this invention. FIG. 11 is a longitudinal sectional view showing a connection state of the spacer of FIG. 10. The isolation | separation perspective view before the connection of the 1st spacer and 2nd spacer which shows another embodiment of this invention. The isolation | separation perspective view before the connection of the 1st spacer and 2nd spacer which shows another embodiment of this invention. The longitudinal cross-sectional view of the connection state which shows another embodiment of this invention.

Explanation of symbols

  W ... interval, 11A ... first spacer, 11B ... second spacer, 12a ... first end, 12b ... second end, 13 ... first connecting means, 14 ... second connecting means, 18, 81 ... connecting shaft 22, 22, 27, 28, 31, 32, 75... Locking protrusion, 24, 29, 33, 83, 84... Through hole, 41, 42, 47, 48, 53, 54. 51, engagement recesses, 46, 52 ... slip-out prevention protrusions, 61, 71, 72 ... connecting tongue pieces, 64, 76 ... slip-out prevention recesses, 81a ... locking flanges, 85, 86 ... locking holes.

Claims (8)

In a connection structure in which the second end of the second strip-shaped spacer is connected to the first end of the first strip-shaped spacer that is interposed between the concrete products to maintain the same product interval. ,
The first end is provided with a first connecting means, the second end is provided with a second connecting means connected to the first connecting means, and the first connecting means and the second connecting means are provided with the first connecting means. Both ends are connected by a first operation for bringing the end and the second end into contact with each other and a second operation for moving the first end and the second end in a direction different from the first operation. A spacer connecting structure characterized by being made. 2. The first connection means and the second connection means according to claim 1, wherein the first connection means and the second connection means are both end portions by a first operation in a state of intersecting the first end portion when the second end portion is viewed from the plate thickness direction. Next, the spacers are connected to each other by a second operation in which both ends are rotated in series. 2. The first connecting means and the second connecting means according to claim 1, wherein the first connecting means and the second connecting means are in series when the second end is viewed from the plate thickness direction with respect to the first end, and both ends are operated in the first direction. Next, the spacer is connected by a second operation in which both ends are moved in the longitudinal direction of the spacer while being in a serial state. In Claim 2, said 1st connection means is constituted by the connecting shaft standingly arranged by the upper surface of said 1st end part, and the latching projection projected sideways at the upper end part of this connecting shaft, The second connecting means is formed at the second end, and is formed at an insertion passage for inserting the connection shaft and the locking projection in the plate thickness direction in the first operation, and at an upper opening of the insertion passage. And a spacer connecting structure formed by a locking step portion for locking the locking protrusion rotated and moved in the second operation. 5. The auxiliary connection shaft according to claim 4, wherein an auxiliary connection shaft is erected on a top surface of the first end portion at a predetermined distance from the connection shaft, and a locking projection protrudes laterally at an upper end portion of the auxiliary connection shaft. The second end portion is formed with an engaging recess that is engaged with the auxiliary connecting shaft in the second operation, and a locking step portion for locking the locking protrusion, and the engaging recess. A spacer connecting structure characterized in that a pair of pull-out preventing protrusions facing each other at an interval smaller than the diameter dimension of the auxiliary connecting shaft are formed on the entrance side of the auxiliary connecting shaft. 6. The spacer connecting structure according to claim 5, wherein the auxiliary connecting shaft provided with the locking protrusion, the engaging recess, the slip-out preventing protrusion, and the locking step are provided at two locations, respectively. . In Claim 3, The said 1st connection means is comprised by the connection tongue piece provided in the horizontal L shape seeing from the side with respect to the upper surface of a 1st edge part, The said 2nd connection means is a 2nd end. In the first operation with respect to the part, the passage is configured to enter the connecting tongue, and in the second operation, the locking step is configured to lock the connecting tongue, and the connecting tongue, the locking step, A spacer connecting structure characterized in that a protrusion preventing protrusion and a protrusion preventing recess are provided between the spacers. In Claim 3, The said 1st connection means is comprised by the some connecting shaft standingly arranged by the upper surface of the 1st edge part, and the latching flange formed in the upper end part of each connector, Said 2nd In the first operation, the connecting means includes a plurality of large-diameter through holes that pass through the respective locking flanges, and a locking hole that is formed in the vicinity of the through-holes and has a smaller diameter than the locking flange. The spacer connecting structure is characterized in that a pair of pull-out preventing protrusions are formed at the boundary between the through hole and the locking hole and are opposed to each other at a distance smaller than the diameter dimension of the connecting shaft. .

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