JP5883417B2 - Top pointer - Google Patents

Description

  The present invention relates to a top edge pointer that is used to display the surface of a concrete layer to be placed, that is, the finish level of the top edge, when a slab is constructed of reinforced concrete.

  In this type of top end pointer, as described in the specification of Patent Document 1, it is known that a mark member for displaying a top end level is attached to a rod-like top end pointer body so that the height can be adjusted. Yes. However, the specific configuration is not described in Patent Document 1, and as a configuration that can be easily conceived at a general design level, a mark member that is externally fitted to the top end pointer body so as to be movable up and down is arbitrarily high. The lock bolt can be fixed with a lock bolt, and the height of the mark member can be adjusted by rotating the mark member screwed into the screw shaft part forward and backward. Such as screw method.

JP 2009-108472 A

  In the lock bolt system as described above, not only is the lock bolt tightening operation time-consuming, but if the lock bolt is loosened due to vibration or the like, the mark member will easily drop by gravity and the displayed top level will change. There is a risk that. Also, with the screw method, it takes time and labor to adjust the height of the mark member, and it is practically impossible to increase the height adjustment range of the mark member.

The present invention proposes a top-pointer that can solve the above-mentioned conventional problems, and the top-pointer according to the present invention makes it easy to understand the relationship with embodiments described later. Therefore, when the reference numerals used in the description of the embodiment are attached with parentheses, the top end marker (21) and a rod-like top end pointer body (20) are formed, and the top end marker (21) A cylindrical portion (27) that is externally fitted to the top end pointer body (20) so as to be movable up and down, a wing plate portion (28) that is provided laterally from the cylindrical portion (27), and an inner portion of the cylindrical portion (27). It consists of a locking projection (29a) projecting along the circumferential direction on the peripheral surface, and the top end pointer body (20) has the inside of the cylindrical portion (27) of the top end marker (21) for locking A top section marker positioning shaft (22) having a cross-sectional shape that can be moved up and down relatively without interfering with the projection (29a) is provided. In the shaft portion (22), the top end marker (21) in a direction that can be moved up and down relative to the top end marker positioning shaft portion (22) is placed around the top end marker positioning shaft portion (22). The locked portion (22a) for positioning the top end marker (21) by engaging and locking the locking projection (29a) in the circumferential direction when rotated is a top end marker positioning shaft portion ( 22) In the crest pointer provided at equal intervals in the length direction ,
The top end marker positioning shaft portion (22) has a strip-like main partition wall portion (24) and a strip-like sub-portion that are connected in parallel to the longitudinal direction of the top end marker positioning shaft portion (22) and at right angles to each other. At the entrance corner between the partition wall portion (25a) and the strip-shaped main partition wall portion (24) and the strip-shaped sub partition wall portion (25a), the longitudinal marker positioning shaft portion (22) is spaced at equal intervals in the length direction. The locking portion (22a) of the top end marker positioning shaft (22) is composed of a plurality of protruding protrusions (26a) to be locked. 26a) .

  The top end pointer of the present invention is used by attaching to the top end pointer mounting portion of the top end pointer mounting bracket that is attached to an appropriate location of the reinforcing bar assembly embedded in the concrete slab so as to stand vertically. In use, a top end marker for displaying the top end level is attached to a height corresponding to the top end level of the top end pointer body. Thus, according to the configuration of the present invention described above, the top end marker is positioned so that it can be moved up and down relative to the top end marker positioning shaft portion. The end marker can be moved up and down freely. When the top marker is moved to the height corresponding to the target top level, the top marker is simply rotated around the top marker positioning shaft within a slight angular range of one rotation or less. The locking projection on the end marker side is automatically fitted and locked to one of the locked portions provided on the top end marker positioning shaft of the top end pointer body, and the top end marker is placed on the target top end. Can be positioned at a level equivalent height.

That is, according to the top end pointer of the present invention, the operation of positioning the top end marker at the height corresponding to the target top end level can be performed very easily and quickly, so that it is compared with the conventional lock bolt type or screw type. Thus, it is possible to greatly reduce the labor and time required for the work of arranging the top end pointer. Further, according to the configuration of the present invention, not only can the top end marker positioning shaft portion be made lightweight, but also a sufficient bending strength can be provided, and a large number of locked portions constituting the locked portion can be provided. Each of the convex portions can also have a sufficient support strength.

  The locking projections (29a, 29b) on the top end marker (21) side and the locked portion (22a) on the top end marker positioning shaft (22) side are provided on the top end marker (21). The rotational axis can be provided symmetrically on both sides in the diameter direction with the rotational axis as a symmetric point. According to this configuration, the top end marker can be stably positioned with respect to the top end marker positioning shaft.

  The top end pointer body (20) includes the top end marker positioning shaft (22), the upper half columnar portion (20c) connected to the upper end of the top end marker positioning shaft (22), and the top The upper half columnar part (20c) and the bulging head part (23) are configured to include the bulging head (23) connected to the upper end of the half columnar part (20c). Similarly to (22), the inside of the cylindrical portion (27) of the top end marker (21) can be configured to have a transverse section that can be moved up and down relatively without interfering with the locking projection (29a). According to this configuration, as a mark for the operator during actual use, the top end pointer that has a length that sufficiently protrudes above the top end level is required. Compared with the case where it forms, it can comprise at a lightweight and cheap. In addition, the presence of the bulging head at the upper end not only can be effective as a mark for the operator, but also facilitates the work when it is removed from the top end pointer mounting bracket after use.

  The top end marker (21) is oriented so that the cylindrical portion (27) of the top end marker (21) is perpendicular to the longitudinal direction of the top end pointer body (20), and the top end pointer body (20 ) Can be integrally formed via a small diameter shaft portion (20a) for threading. According to this configuration, the manufacturing cost can be reduced as compared with the case where the top end marker and the top end pointer body must be separately formed.

  Further, an elastic cylindrical body (14) is concentrically connected to the lower end of the top end pointer body (20), and this elastic cylindrical body (14) is connected to the top end pointer of the top end pointer mounting bracket (1). It can be configured such that it can be externally fitted and locked to a locking plate portion (17) projecting upward from the mounting portion (6). According to this configuration, the top end pointer body that receives the external force in the horizontal direction in use can be easily tilted against the elastic supporting force, and the top end pointer body is attached to the top end. It can also be used as a means for detachably connecting to the pointer mounting bracket, and an elastic cylindrical body is interposed in the middle position of the ceiling pointer body with a mounting portion for the ceiling pointer mounting bracket at the lower end. Compared to the configuration, the top end pointer body can be removed simply by pulling the top end pointer body from the top end pointer mounting bracket, and the top end pointer body can be easily and efficiently removed. Can be done.

FIG. 1A is a side view showing the first stage of the mounting operation of the top end pointer mounting bracket, FIG. 1B is a side view showing a state where the top end pointer mounting bracket is completely mounted, and FIG. 1C is the mounting of the top end pointer mounting bracket. It is a top view which shows a completion state. FIG. 2 is a front view showing a state in which the top end pointer is attached to a predetermined portion of the reinforcing bar assembly using the top end pointer. FIG. 3 is a plan view of the top end pointer mounting bracket. FIG. 4 is an exploded, partially cutaway perspective view of the top end pointer mounting bracket. FIG. 5A is a front view showing the top end pointer before use, and FIG. 5B is a side view of the top end pointer. 6A is an enlarged sectional view taken along line XX in FIG. 5B, and FIG. 6B is an enlarged sectional view taken along line YY in FIG. 5B. FIG. 7A is a plan view of the top end marker separated from the top end pointer body, and FIG. 7B is a central cross-sectional front view of the top end marker. FIG. 8A is a cross-sectional plan view showing a state in which the top end marker is fitted to the top end pointer body so as to be movable up and down, and FIG. 8B is a longitudinal side view of the fitting portion of both. FIG. 9A is a cross-sectional plan view showing a state in which the top end marker is locked to the top end pointer body at a predetermined position, and FIG. 9B is a longitudinal side view of a fitting portion between them. FIG. 10A is a front view before use showing a state in which the top end pointer is attached to the top end pointer mounting bracket, and FIG. 10B is a side view thereof. It is a principal part expansion vertical front view.

  First, a description will be given of a top end pointer mounting bracket required when using the top end pointer according to the present invention. A top end pointer mounting bracket 1 shown in FIG. 1 includes a horizontal upper rebar 2 and a horizontal lower rebar 3. A mounting bracket for vertically mounting a bar-shaped top end pointer 5 to a reinforcing bar assembly 4 comprising: a mounting plate 7 provided with a top end pointer mounting portion 6 and a positioning elastic gripping tool 8; The mounting plate 7 is provided with a pair of left and right extending plate portions 9a, 9b that enter the lower side of the upper rebar 2 from the left and right sides of the central portion placed on the lower rebar 3; The positioning elastic gripping tool 8 is attached to the lower side of the central portion of the mounting plate 7 and is elastically fitted to the lower rebar 3 from the top against the elasticity of the lower rebar 3 from above. Can be gripped at this position Because elastic gripper 8 is configured such that the pair of left and right extending plate portion 9a while holding the lower reinforcing bar 3, 9b abuts against the underside of the upper reinforcing bar 2.

  In more detail, as shown in FIGS. 3 and 4, the central portion of the mounting plate 7 to which the positioning elastic gripping tool 8 is attached on the lower side protrudes in parallel with the length direction of the lower rebar 3. A state in which the bent portion 7a is formed and the zenith portion of the positioning elastic gripping tool 8 formed by bending one belt-like elastic plate into an Ω shape is fitted into the concave groove portion below the bent portion 7a. Thus, the mounting plate 7 and the zenith portion of the positioning elastic gripping tool 8 are coupled by a single caulking 10. As shown in FIG. 4, the caulking 10 has a barrel of a burring hole formed downward in the mounting plate 7 (the projecting portion 7a) in one mounting hole 8a provided at the top of the elastic gripping tool 8 for positioning. The cylindrical wall portion 10a is penetrated downward, and the cylindrical wall portion 10a is caulked and formed below the zenith portion of the positioning elastic gripping tool 8. Since the width of the positioning elastic gripping tool 8 (the width of the band-shaped elastic plate) is as small as half or less of the total length of the central portion (the projecting portion 7a) of the mounting plate 7, the positioning elastic gripping tool 8 is The extension plate portions 9a and 9b are attached in a state of being aligned with the central side of the attachment plate 7 opposite to the side where the extension plate portions 9a and 9b are provided continuously, and the extension plate portions 9a and 9b are provided continuously. An abutting portion 11 that abuts on the lower rebar 3 is provided on the side of the central portion of the mounting plate 7 on the side of the mounting plate 7.

  Reinforcing ribs 12 are formed on the pair of left and right extending plate portions 9a and 9b so as to extend from a region in the mounting plate 7 to a position near the tip of the extending plate portions 9a and 9b and bend downward. Further, a rising plate portion 13 is provided at the distal ends of the extension plate portions 9a and 9b.

  The top end pointer mounting portion 6 includes a through hole 15 provided in the mounting plate 7 so that the elastic cylindrical body 14 at the lower end of the top end pointer 5 can be inserted from above, and the through hole from the side of the mounting plate 7. A bent continuous plate portion 16 that is continuously bent in an L shape to a position just below 15, and a locking plate that is continuously bent upward from the bent continuous plate portion 16 toward the through hole 15. The unit 17 is configured. More specifically, the through-hole 15 is formed by burring, and includes a cylindrical plate portion 15 a that protrudes downward from the mounting plate 7. The locking plate portion 17 has a shape having a check claw portion 17a on both sides of the upper end portion that can be externally fitted and locked against the elastic cylindrical body 14 at the lower end of the top end pointer 5 against elasticity.

  As shown in FIGS. 5 and 6, the top end pointer 5 is continuously formed by integral molding via a rod-shaped top end pointer main body 20 and the upper end of the top end pointer main body 20 via a small-diameter shaft portion 20a for threading. The top end marker 21 and the elastic cylindrical body 14 whose upper end is fitted and fixed to the lower end cylindrical shaft portion 20b of the top end pointer main body 20 are configured. The top end pointer main body 20 includes a top end marker positioning shaft portion 22 formed in a lower half region where the top end marker 21 is fixed, and a bulging head portion 23 provided continuously with the upper end. The upper half columnar portion 20c between the top end marker positioning shaft portion 22 and the bulging head portion 23 is formed in a column shape having a cross-shaped cross section.

  The top end marker positioning shaft portion 22 is connected to the diametrical strip-shaped main partition wall portion 24 located at the center in the cross section, and is connected to the both sides of the strip-shaped main partition wall portion 24 at right angles outward from a point-symmetric position with respect to the center. The strip-shaped sub-partitions 25a and 25b, and the coverings integrally formed at equal intervals in the longitudinal direction of the top end pointer main body 20 at the corners between the strip-shaped main partition walls 24 and both the strip-shaped sub-partitions 25a and 25b. It is comprised by the latching convex parts 26a and 26b. The width in the diameter direction connecting the locked convex portions 26a and 26b on both sides of the strip-shaped main partition wall portion 24 is substantially the same as the overall maximum diameter of the top end marker positioning shaft portion 22 and is located in the center. The width in the diameter direction of the band-shaped main partition wall 24 is sufficiently smaller than the maximum diameter of the entire top marker positioning shaft 22. Accordingly, the planar shape of the top end marker positioning shaft portion 22 is a substantially rectangular shape having a length in the diametrical direction connecting the locked convex portions 26a and 26b on both sides of the band-shaped main partition wall portion 24 as a long side. Yes. The locked convex portions 26a and 26b are in the shape of arrows having constricted portions on both upper and lower surfaces near the opposite ends, and between the two vertically locked convex portions 26a. And the to-be-latched part 22a is formed between the convex parts 26b for to-be-latched.

  The top end marker 21 can be separated from the top end pointer main body 20 by being twisted off by the small diameter shaft portion 20a for twisting. As shown in FIG. It is composed of a pair of left and right wing plate portions 28 integrally provided on the left and right sides from the cylindrical portion 27. The cylindrical portion 27 has a slightly larger inner diameter than the maximum diameter of the top marker positioning shaft portion 22, and a pair of locking projections 29 a and 29 b are provided on both sides in the diameter direction on the inner peripheral surface thereof. Has been. Further, as shown in FIG. 7B, thin hinge portions 28a and 28b that allow the blade plates 28a and 28b to be bent in the vertical direction are formed at the bases connected to the cylindrical portions 27 of the blade plates 28a and 28b. ing.

  As shown in FIG. 8, the pair of locking projections 29a and 29b are formed by positioning the locking projections 29a and 29b on both sides in the short side direction of the top marker positioning shaft portion 22 having a rectangular planar shape. In this state, the cylindrical portion 27 is fitted on the top end marker positioning shaft portion 22 of the top end pointer body 20 so that the top end marker 21 can be moved in the axial direction of the top end pointer body 20. The cylindrical portion 27 is fitted in the top end marker positioning shaft portion 22 of the top end pointer main body 20 and the cylindrical portion 27 is locked in a predetermined direction around the top end pointer main body 20, that is, locked. By rotating the projections 29a and 29b in the direction in which the tips of the projections 29a and 29b are directed, the locking projections 29a and 29b on both sides are engaged with the engaged portions 22a of the top end marker positioning shaft portion 22 of the top end pointer body 20; Chi, fitted between two of the locking projections 26b adjacent between two of the locking projections 26a adjacent to the vertical and in the vertical circumferentially engaged to it is possible. When the locking projections 29a and 29b are fitted between the locking projections 26a and 26b in the circumferential direction, as shown in FIG. 9, the locking projections 29a and 29b are located near the tips of the locking projections 26a and 26b. The constricted portions are configured so that the non-return convex portions protruding on both the upper and lower sides near the tips of the locking projections 29a and 29b are automatically engaged to prevent the constriction.

  The rising wall portions 30a and 30b are integrally connected to the rear ends of the locking projections 29a and 29b. The rising wall portions 30a and 30b increase the attachment strength of the locking projections 29a and 29b to the cylindrical portion 27. When the locking projections 29a and 29b are fitted to the engaged portion 22a, The rising wall portions 30a and 30b are in contact with the tips of the locked convex portions 26a and 26b, so that the rotation angle of the cylindrical portion 27 can be limited. Of course, the leading ends of the locking projections 29a and 29b when the locking projections 29a and 29b are fitted to the engaged portions 22a without restricting the rotation angle of the cylindrical portion 27 by the rising wall portions 30a and 30b. Can be configured such that the rotation angle of the cylindrical portion 27 is limited by abutting the inner end of the engaged portion 22a.

  As shown in FIG. 5, the bulging head 23 at the upper end of the top end pointer main body 20 is located inside the cylindrical portion 27 between a pair of locking projections 29 a and 29 b in the cylindrical portion 27 of the top end marker 21. The planar shape is configured as an oval so that it can be moved through in the axial direction. Further, as shown in FIG. 5, the bulging head 23 is formed with a large number of recesses for reducing the material and reducing the weight. The top end pointer body 20 and the top end marker 21 including the bulging head 23, the top end marker positioning shaft portion 22, and the upper half columnar portion 20c having a cross-shaped cross section are twisted in the direction shown in FIG. By integrally connecting via the small-diameter shaft portion 20a for cutting, synthetic resin molding can be integrally performed using a split mold that is divided into left and right at the center line of FIG. 5A.

  In use, the top end marker 21 is separated from the top end pointer main body 20 by twisting off the small-diameter shaft portion 20a for twisting, and the top end marker 21 is passed through the bulging head 23 of the top end pointer main body 20. Then, the top end marker positioning shaft portion 22 is externally fitted. Then, the elastic cylindrical body 14 connected to the lower end of the top end pointer main body 20 is attached to the top end pointer attaching portion 6 of the attachment fitting 1 as shown in FIG. That is, the elastic cylindrical body 14 is inserted through the through-hole 15 of the mounting plate 7 downward from above, and the lower end portion of the elastic cylindrical body 14 is externally fitted against the locking plate portion 17 against elasticity, The check claw portion 17 a of the stop plate portion 17 is bitten into the inner peripheral surface of the elastic cylindrical body 14, and the top end pointer main body 20 is attached in a state of standing upright with respect to the attachment plate 7. When the top end pointer 5 is thus attached to the top end pointer mounting bracket 1, the top end pointer mounting bracket 1 is mounted at the top end pointer mounting position of the reinforcing bar assembly 4 as shown in FIG. 1.

  That is, the top end pointer mounting position is selected from the intersections of a large number of upper and lower rebars 2 and 3 of the rebar assembly 4, and the lower rebar at the intersection of the upper and lower rebars 2 and 3 as shown in FIG. 3 with the pair of left and right extending plate portions 9a and 9b sandwiching the pair of left and right extending plate portions 9a and 9b under the upper rebar 2 while positioning the elastic gripping tool 8 for positioning on the lower rebar 3 So that the center portion (projected portion 7a) of the mounting plate 7 is pushed down to the lower rebar 3 side, and the positioning elastic gripping tool 8 is externally locked against the lower rebar 3 against elasticity. Let As a result, the contact portion 11 of the center portion (the projecting portion 7a) of the mounting plate 7 located between the pair of left and right extending plate portions 9a and 9b contacts the lower rebar 3 and the pair of left and right extending portions. A pair of left and right extending plate portions 9a and 9b are applied to the lower side of the upper rebar 2 located between the rising plate portion 13 at the tip of the plate portions 9a and 9b and the central portion (projected portion 7a) of the mounting plate 7. In contact therewith, the mounting plate 7 is supported in a horizontal posture.

  At this time, when the mounting plate 7 moves up and down around the lower rebar 3, the pair of left and right extending plate portions 9 a and 9 b abut on the lower side of the upper rebar 2 on the left and right sides of the lower rebar 3. The pair of left and right extension plate portions 9a and 9b swinging up and down with the contact portion 11 with which the mounting plate 7 contacts the lower rebar 3 as a fulcrum is prevented. This is prevented by the fact that the output plate portions 9 a and 9 b are in contact with the lower side of the upper rebar 2 and the positioning elastic gripping tool 8 is fitted to the lower rebar 3 from above. Further, the sliding of the mounting plate 7 on the lower rebar 3 in the length direction of the lower rebar 3 means that the rising plate portion 13 at the tip of the pair of left and right extending plate portions 9 a and 9 b and the upper rebar 2. Although it is blocked by the abutment or the abutment between the central portion (projected portion 7 a) of the mounting plate 7 and the upper rebar 2, in actuality, in the fitting state between the positioning elastic gripping tool 8 and the lower rebar 3. It is desirable that the mounting plate 7 is prevented from sliding due to the frictional resistance between them and the frictional resistance between the pair of left and right extending plate portions 9a and 9b and the upper rebar 2.

  By attaching the top end pointer mounting bracket 1 so as to be adjacent to the intersection of the upper and lower rebars 2 and 3 of the reinforcing bar assembly 4 as described above, the mounting plate 7 is located above the lower reinforcing bar 3 of the reinforcing bar assembly 4. The top end pointer 5 attached vertically to the top end pointer mounting portion 6 of the mounting plate 7 as described above stands up almost vertically as shown in FIG. Become. In this state, the top end marker 21 fitted on the top end marker positioning shaft portion 22 of the top end pointer body 20 of the top end pointer 5 is adjusted to a predetermined top end level. In other words, the top end marker 21 is reversely rotated in the positioning release direction with respect to the top end marker positioning shaft portion 22, and as shown in FIG. The top end marker 21 is moved up and down to a predetermined top end level with respect to the top end marker positioning shaft portion 22 so that the locking projections 29a and 29b on the end marker 21 side can be moved up and down.

  When the position of the top end marker 21 is adjusted to a predetermined top end level, the top end marker 21 is rotated forward in the positioning action direction with respect to the top end marker positioning shaft portion 22, and as shown in FIG. The locking protrusions 29a and 29b on the marker 21 side are arranged in the circumferential direction between the engaged portions 22a of the top end marker positioning shaft portion 22, that is, between the two protruding protrusions 26a and 26b adjacent to each other vertically. Press-fit to a limited depth against elasticity. Through the above operation, the top end marker 21 is fixed to the top end marker positioning shaft portion 22 of the top end pointer body 20 at a predetermined top end level. In this attached state of the top end pointer 5, the top end pointer mounting bracket 1 is in a state of covering the lower rebar 3 and there is no possibility that a portion protruding above the upper rebar 2 is generated. There is no fear of reducing the concrete covering thickness of the upper rebar 2.

  The finishing operation of the top end of the cast concrete is performed as is well known in the art with the pair of left and right blades 28 of the top marker 21 being the finishing level of the top end of the cast concrete. When an external force is exerted to tilt 5 to the side, the elastic deflection of the elastic cylindrical body 14 protruding upward from the through hole 15 of the mounting plate 7 is utilized as shown in phantom lines in FIG. The top pointer 5 tilts and can absorb the external force. When released from the external force, the top end pointer 5 automatically returns to the original vertical posture by the elastic restoring force of the elastic cylindrical body 14. When an external force in the vertical direction is applied to the pair of left and right wing plates 28 of the top end marker 21, the wing plate portion 28 can be easily moved up and down due to the presence of the thin hinges 28a and 28b at the base. The external force can be absorbed by bending in the direction. Then, the top end pointer 5 protruding from the top end of the cast concrete is strongly pulled up from the location where the top end of the cast concrete has been finished, and the elastic cylindrical body 14 at the bottom end is attached to the top end pointer mounting bracket 1. It can be separated from the side locking plate 17 and removed.

  In addition, even if the top end pointer 5 is attached to the top end pointer mounting bracket 1 after the top end pointer mounting bracket 1 in a state where the top end pointer 5 is not mounted is mounted at a predetermined position of the reinforcing bar assembly 4. good.

  The top end pointer of the present invention is used as a top end pointer that is attached to the top end pointer mounting bracket attached to the rebar assembly side in a substantially vertical standing posture and displays the top end level to the operator at the slab building site. I can do it.

DESCRIPTION OF SYMBOLS 1 Top end pointer mounting bracket 2 Upper rebar 3 Lower rebar 4 Reinforcing bar assembly 5 Top end pointer 6 Top end pointer mounting part 7 Mounting plate 8 Positioning elastic gripping tool 9a, 9b A pair of left and right extending plate parts 10 Caulking 11 Contact portion 13 Rising plate portion 14 Elastic cylindrical body 15 Through hole 16 Bending continuous plate portion 17 Locking plate portion 20 Top end pointer body 20a Small diameter shaft portion for threading 20b Lower end cylindrical shaft portion 20c Upper half columnar portion DESCRIPTION OF SYMBOLS 21 Top end marker 22 Top end marker positioning shaft part 22a Locked part 23 Swelling head 24 Band-shaped main partition part 25a, 25b Band-shaped sub partition part 26a, 26b Locking convex part 27 Cylindrical part 28 Left-right paired wing Plate portion 29a, 29b Locking projection 30a, 30b Rising wall portion

Claims (5)

A top end marker and a rod-like top end pointer main body, the top end marker is a cylindrical portion that is externally fitted to the top end pointer body so as to be movable up and down, a wing plate portion that is continuously provided laterally from the cylindrical portion, and the cylinder It consists of a locking projection that protrudes along the circumferential direction on the inner peripheral surface of the unit, and the top end pointer body can be moved up and down relatively without interfering with the locking projection inside the cylindrical portion of the top end marker Do cross-sectional top end marker positioning shank shape is provided on the top end marker positioning shaft portion, the said top end markers relative vertically movable orientation with respect to the top end marker positioning shaft portion The locked portion for positioning the top end marker by engaging and locking the locking projection in the circumferential direction when rotated around the top end marker positioning shaft portion is a top end marker positioning shaft portion. Are provided at equal intervals in the length direction In heaven end pointer you are,
In the top end marker positioning shaft portion, a strip-shaped main partition wall portion and a strip-shaped sub partition wall portion which are connected in parallel to the longitudinal direction of the top end marker positioning shaft portion and perpendicular to each other, and the strip-shaped main partition wall portion It is composed of a number of locking projections protruding at equal intervals in the length direction of the top end marker positioning shaft at the corner between the top and the belt-shaped sub-partition wall. The locked portion of the shaft portion is a top end pointer formed between upper and lower locked convex portions .   The locking projection on the top end marker side and the locked portion on the top end marker positioning shaft side are provided point-symmetrically on both sides in the diametrical direction with respect to the rotational axis of the top end marker. The top end pointer according to claim 1. The top end pointer body includes a top end marker positioning shaft portion, an upper half columnar portion connected to the upper end of the top end marker positioning shaft portion, and a bulging head connected to the upper end of the upper half columnar portion. The upper half-columnar portion and the bulging head are transversely movable up and down relatively without interfering with the locking projection within the cylindrical portion of the top end marker, like the top end marker positioning shaft portion. The top end pointer according to claim 1, wherein the top end pointer is configured in a surface shape . The top end marker is integrated with the upper end of the top end pointer body through a small-diameter shaft for twisting in such a direction that the cylindrical portion of the top end marker is perpendicular to the longitudinal direction of the top end pointer body. The top end pointer according to any one of claims 1 to 3, which is molded . An elastic cylindrical body is concentrically connected to the lower end of the top end pointer body, and this elastic cylindrical body is attached to a locking plate portion protruding upward from the top end pointer mounting portion of the top end pointer mounting bracket. The top end pointer according to any one of claims 1 to 4, wherein the top end pointer is configured so as to be fitted and locked .

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