JP3699547B2 - Downward swing cage with stop needle replacement mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a downward swing retainer for hanging and supporting a downward swing for checking the verticality of a construction part with respect to a horizontal plane and aligning a ground mark in a construction work, and in particular, a mechanism for replacing a fixing stop needle. It relates to what it has.
[0002]
[Prior art]
As one type of swing-down cage, there is a case where a stop needle is provided in the case so that it can be protruded and retracted, and can be fixed to a wooden pillar of a building by the insertion of this stop needle. JP-A-7-190781. This type of downward swing retainer is configured to pull out a stop needle by a swinging operation of a handle provided on the case after completion of a vertically extending operation by downward swing.
[0003]
[Problems to be solved by the invention]
In general, the stop needle of this type of swinging cage may be bent or broken by repeatedly inserting and pulling out. In such a case, it is necessary to replace the stop needle. . However, according to the above-described conventional swinging cage, the cover must be removed from the case when replacing the stop needle, and thus the cover may be lost. In addition, when performing a vertical swinging operation by swinging down, a structure in which a load acting on the case by the swinging weight body is supported through the cover placed on the case is unavoidable.
[0004]
The present invention has been made under the circumstances as described above, and the technical problem thereof is that in a swinging cage that is fixed to a counterpart wood or the like with a stop needle, the replacement of the stop needle is performed. It is to be able to work easily and quickly.
[0005]
[Means for Solving the Problems]
As a means for effectively solving the technical problem described above, the downward swing retainer provided with the stop needle replacement mechanism according to the present invention includes a case containing a reel for winding the downward swing yarn, and a needle body at the distal end. In the downward swing retainer having a stop needle that can be projected and retracted from the mounting surface of the case and a rear needle handle protrudes from the back surface of the case, an engagement protrusion formed on the stop needle; And a stopper for preventing the stopper body from coming off in a backward direction at a position where the needle body is completely accommodated in the case by the contact of the stopper, and the stopper is integral with the stopper and is provided in a movable state. And a slider for forcibly displacing the stopper to a non-interference position with the engaging protrusion. Here, the “retracting direction” refers to a direction opposite to the direction in which the retaining needle is inserted, that is, the pulling direction.
[0006]
In the downward swing cage equipped with the stop needle replacement mechanism having the above structure, the stop protrusion inserted into the case in a state where the movement for the piercing / extracting operation with respect to the counterpart wood is permitted, the engaging protrusion is the stopper. , The backward movement of the needle body from the position where the needle body is completely accommodated in the case is restricted, and the drop-out from the case is prevented. When the needle body is bent or broken due to repeated use of the stop needle, the slider is forcibly displaced in the non-engagement direction by manually displacing the slider provided in the case. In this way, the engaging projection does not interfere with the stopper in the process of moving the stop needle in the pulling direction, and therefore the stop needle can be removed from the case and replaced with a new one.
[0007]
As another solution, the swing-down cage having the stop needle replacement mechanism according to the present invention is engaged in a state in which the engagement protrusion formed on the stop needle allows the stop needle to be inserted and pulled out. And a leaf spring in which a stopper is formed at a free end that is displaced in the non-engagement direction by interference with the engagement protrusion, and a displacement of the stopper in the non-engagement direction provided on the case. And a slider for releasing the restriction.
[0008]
In this configuration, the stopper is normally restricted by a slider at a position where it can interfere with the engaging protrusion of the stop needle. Therefore, the stopper is allowed to move for the piercing / pulling operation with respect to the counterpart wood or the like. When the locking needle inserted into the case in a state is interfered with the stopper, the retracting movement from the position where the needle main body is completely accommodated in the case is restricted, and the locking needle is not dropped from the case. Be blocked. Also, if the needle body is bent or broken due to repeated use of the stop needle, the displacement restriction of the stopper by the slider is released and the stop needle is moved in the backward direction. The stopper is slid in the non-engagement direction due to interference with the protrusion, and the retaining state with respect to the retaining needle is released, so that the retaining needle can be removed from the case and replaced with a new one.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is an explanatory diagram of the internal structure of a first embodiment of a swing-down cage equipped with a stop needle replacement mechanism according to the present invention. Reference numeral 10 denotes a case in which a screw (not shown) screwed into each of a plurality of screw holes 11 is combined symmetrically in a direction perpendicular to the illustrated surface, that is, in FIG. 1, the inside is exposed by removing one case. It shows the state that was made to.
[0010]
Reference numeral 20 denotes a reel which is housed in the case 10 and is rotatably provided around a shaft 21 formed in the case 10 and winds the lowering yarn 1. The lowering yarn is wound by a spiral spring (not shown). 1 is biased in the winding direction. The swung yarn 1 meanders from the outer periphery of the reel 20 so as to come into contact with some of the plurality of yarn hooking pins 12 (12 _{1 to} 12 ₈ ) arranged in the case 10. Is led out to the outside of the case 10 through a yarn outlet 13a provided on the lid 13 at the lower end, and the weight body 2 is connected to the end thereof.
[0011]
Of the thread hook pins 12 _{1 to} 12 ₈ , two thread hook pins 12 ₄ and 12 ₅ are provided on the adjustment knob 14, and the adjustment knob 14 can be rotated within a predetermined angle range with respect to the case 10. It is provided in the state. That is, by rotating the adjusting knob 14 from the outside of the case 10 by an arbitrary angle, the thread hook pins 12 ₄ and 12 ₅ are also rotated, and the lowering thread 1 between the thread hook pins 12 _{3 to} 12 _{6 is} rotated. Since the meandering angle changes, the frictional resistance with respect to the lowering yarn 1 can be increased or decreased thereby, and the hanging length of the lowering yarn 1 can be adjusted.
[0012]
A permanent magnet 30 for fixing the case 10 (a downward swing cage having a stop needle replacement mechanism) to a steel column in a building is attached to the mounting surface 10a on the front surface of the case 10. A stopper needle 40 for fixing the case 10 (a downward swing cage having a stopper needle changing mechanism) to a wooden part such as a wooden pillar in the building is substantially above the mounting surface 10 a of the case 10. It is inserted movably in the vertical direction.
[0013]
The stop needle 40 includes a needle main body 41 that can project from a small hole 10b formed in the upper part of the mounting surface 10a, and a needle handle 42 at the rear part. As shown in FIG. 2, a compression coil spring 43 is disposed in front of the needle handle 42 (left side in FIG. 1), and the stop needle 40 is normally moved by an urging force of the compression coil spring 43 in the extending direction. The needle main body 41 is immersed in the case 10 through the small hole 10b, and the head 42a at the rear end of the needle handle 42 is in a state of protruding from the back surface 10c of the case 10 to the outside. An engaging protrusion 42b is formed on the upper surface of the tip of the needle handle 42 of the stop needle 40, and a rack-like tooth portion 42c and a plurality of engaging recesses 42d are formed on the lower surface of the needle handle 42.
[0014]
On the other hand, in the vicinity of the rear portion of the upper end surface 10d of the case 10, a slider 15 as shown in the perspective view of FIG. 3 is pivotally connected via a pair of sliding pieces 15a and 15b. A stopper 15c that can interfere with the engagement protrusion 42b formed on the needle handle 42 of the stop needle 40 is provided at the portion. The slider 15 is normally in a state indicated by a solid line in FIG. 4, and the stopper 15c on the lower surface thereof is in an engagement position with the engagement protrusion 42b of the stop needle 40 in the retracted position. The state shown can be angularly displaced by an angle θ, and accordingly, the stopper 15c is displaced to a non-engagement position with the engagement protrusion 42b. A groove 15d is formed on the upper surface of the slider 15, and the angular displacement can be performed by engaging a coin or the like in the groove 15d.
[0015]
A rack plate 50 is accommodated in the lower part of the case 10 so as to be movable in a direction substantially parallel to the stop needle 40, and a head 51 at the rear end projects from an opening formed in the lower part of the back surface 10 c of the case 10. It is supposed to be sunk. A rack-like tooth portion 52 is formed on the upper surface near the tip of the rack plate 50.
[0016]
In the case 10, a link member 60 formed with a first gear portion 61 that meshes with the rack-like tooth portion 42 c of the stop needle 40 and a second gear portion 62 that meshes with the rack-like tooth portion 52 of the rack plate 50. Is disposed between the retaining needle 40 and the rack plate 50. The link member 60 is rotatably attached to the case 10 via a pin shaft 63 at a portion near the first gear portion 61, and is biased clockwise by a tension coil spring 65 as biasing means. Has been. Both the first gear portion 61 and the second gear portion 62 are formed along a circumference around the pin shaft 63. The link member 60 is provided with an arc-shaped long hole 64 for avoiding interference with the shaft 21 or the like supporting the reel 20.
[0017]
On the outer peripheral side of the pin shaft 63 on the inner side surface of the case 10, a circumferential bearing portion 16 centering on the axial center of the pin shaft 63 is formed. An annular step surface (not shown) that is formed in a stepped shape around the shaft hole is fitted on the outer peripheral side of the shaft hole so as to be slidably rotatable. That is, the link member 60 is rotatably supported around the pin shaft 63 by the bearing portion 16.
[0018]
A lock member 17 is slidably provided below the protruding position of the needle handle 42 on the back surface 10 c of the case 10, and an upper end portion of the lock member 17 is engaged with an engagement recess on the lower surface of the needle handle 42. The stop needle 40 can be fixed by being inserted into and engaged with 42d.
[0019]
In the downward swing cage having the above-described configuration of the stop needle replacement mechanism, in the normal case where the stop needle 40 is in the retracted position and the needle main body 41 is immersed in the case 10, a needle pulling operation described later is performed. The rack plate 50 is accommodated in the case 10. Since the stop needle 40 is urged in the backward direction by the compression coil spring 43, the needle body 41 does not accidentally jump out of the case 10, and in this state, it is formed on the needle handle 42. The engaging protrusion 42b is in contact with the stopper 15c on the lower surface of the slider 15, whereby the retreat limit position of the stop needle 40 is defined, and the case 10 is prevented from falling off toward the back surface 10c.
[0020]
At the time of vertical measurement work by swinging down, if the mounting counterpart surface is made of a steel frame or the like, the swing-down cage equipped with the stop needle replacement mechanism is attached to a predetermined height by the magnetic attraction force of the permanent magnet 30. When attaching to the attachment counterpart surface made of wood or the like with the stop needle 40, the needle body 41 of the stop needle 40 is pressed against the wooden counterpart 42 by pressing or hitting the head portion 42a of the needle handle 42 protruding from the back surface 10c of the case 10. Insert into the mounting surface. Then, since the link member 60 rotates around the pin shaft 63 to the position indicated by the two-dot chain line in FIG. 1 by the meshing of the rack-like tooth portion 42c and the first gear portion 61, the rack-like tooth portion 52 and the second gear portion 52 and the second gear portion 61 are rotated. The rack plate 50 moves backward through the gear portion 62, and the head portion 51 protrudes from the back surface 10c of the case 10 as shown by a two-dot chain line in FIG. In the attached state, the vertical measurement work is performed by unwinding the downward swing yarn 1 with the weight body 2 attached thereto from the yarn outlet 13a to the lower side of the case 10 and drooping vertically.
[0021]
After the measurement is completed, when removing the swing-down cage equipped with the stop needle replacement mechanism from the mating mounting surface, the head 51 of the rack plate 50 protruding from the back surface 10c of the case 10 may be pushed into the case 10. That is, when the head 51 of the rack plate 50 is pushed into the case 10, the link member 60 rotates about the pin shaft 63 in the clockwise direction in FIG. Pulled out from.
[0022]
When the needle main body 41 of the stop needle 40 bends or breaks, it becomes necessary to replace the stop needle 40, and the slider 15 provided in the case 10 is pinched with fingers or a coin is inserted into the groove 15d. The stopper 15c is forcibly displaced to the non-engagement position with the engagement protrusion 42b as shown by the dashed line in FIG. 2 by engaging and angularly displacing by the angle θ as shown by the dashed line in FIG. In this case, the stop needle 40 can be further retracted from the retracted position shown in FIG. When the new stop needle 40 is inserted from the back surface 10c side of the case 10 to the position shown in FIG. 1, the slider 15 is returned to the position shown by the solid line in FIG. The stopper needle 40 is prevented from coming off by returning to a position where it can interfere. Therefore, this series of stop needle replacement operations can be performed without disassembling the case 10 or separating any parts from the case 10.
[0023]
Next, FIG. 5 is explanatory drawing which shows the principal part of 2nd embodiment of the downward swing holder | retainer provided with the stop needle replacement mechanism based on this invention. In this embodiment, the leaf spring 18 is attached to the inner surface of the upper end portion of the case 10 so as to face the accommodation space of the needle handle 42 of the retaining needle 40 in the case 10, and at the free end of the leaf spring 18, It has a stopper 18a capable of interfering with an engaging projection 42b formed on the upper end of the needle handle 42. On the other hand, a slider 19 is provided at the upper end of the case 10 so as to be slidable back and forth (left and right in the figure), and the stopper 18a (leaf spring 18) is manually operated by the operating portion 19a exposed to the outside of the case 10. ) Is selectively moved to a contact position or a non-contact position with the upper surface. The stopper 18 a is formed in a triangular shape that protrudes downward by bending the free end of the leaf spring 18.
[0024]
As shown in FIG. 5 (A), the downward swing cage having the stop needle replacement mechanism having the above-described configuration is normally such that the slider 19 is at the rear end (right end in the figure) of its movable range, The end 19b is in contact with the upper surface of the stopper 18a formed at the free end of the leaf spring 18, so that the stopper is in the engagement groove 42e formed behind the engagement projection 42b in the needle handle 42. In 18a, the upward displacement is regulated. The stop needle 40 at the retreat limit position where the needle body 41 is immersed in the case 10 has an engagement protrusion 42b formed on the needle handle 42 and the stopper 18a whose upward displacement is regulated by the slider 19. By the interference, the backward movement is limited, and the case 10 is prevented from falling off to the back surface 10c side.
[0025]
When the stop needle 40 is to be replaced, as shown in FIG. 5B, the end 19b is moved by moving the slider 19 forward (left side in the drawing) with fingers or coins. The restriction of the displacement of the stopper 18a due to the contact with the lower surface of the case 10 is released, the needle handle 42 protruding from the back surface of the case 10 is pinched and the stop needle 40 is moved backward in the pulling direction. Then, the stopper 18a is displaced upward with the elastic deformation of the leaf spring 18 with the lower inclined surface of the tip thereof being in sliding contact with the stop needle 40 and being moved backward, and the engagement protrusion 42b Get on top. At this time, the stopper 18a loses the retaining function due to the interference with the engaging protrusion 42b, so that the retaining needle 40 can be removed from the case 10.
[0026]
Further, when the new stop needle 40 is inserted from the back surface 10c side of the case 10, the stopper 18a rides on the engaging protrusion 42b with the elastic deformation of the leaf spring 18 as shown in FIG. After the state shown, it is loosely fitted into the engaging groove 42e as shown in FIG. If the upper displacement of the stopper 18a is restricted by moving the slider 19 backward (right side in the figure) with a finger and bringing its end 19b into contact with the upper surface of the stopper 18a, the stop needle 40 is prevented from coming off. The
[0027]
【The invention's effect】
According to the downward swing cage having the stop needle replacement mechanism according to the present invention, the following effects are realized.
(1) Since the stop needle can be replaced without disassembling the case or separating the part from the case, there is no possibility of losing the part.
(2) Since the stop needle can be pulled out only by operating the slider provided on the case, the replacement work can be performed easily and quickly.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of an internal structure showing a first preferred embodiment of a swing-down cage equipped with a stop needle replacement mechanism according to the present invention.
FIG. 2 is a perspective view showing a stop needle in a downward swing cage equipped with a stop needle replacement mechanism of the embodiment together with a coil spring and a stopper.
FIG. 3 is a perspective view showing a slider in a downward swing retainer provided with the stop needle replacement mechanism of the embodiment.
FIG. 4 is a plan view showing the operation of the slider and the stopper in the downward swing cage provided with the stop needle replacement mechanism of the embodiment.
FIGS. 5A and 5B show a main part of a second preferred embodiment of a downward swing cage equipped with a stop needle replacement mechanism according to the present invention, in which FIG. 5A is a normal state and FIG. It is explanatory drawing which shows.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lowering thread 10 Case 15, 19 Slider 15c, 18a Stopper 18 Leaf spring 20 Reel 40 Stop needle 41 Needle main body 42 Needle handle 42b Engagement protrusion

Claims (2)

A needle body (41) at the tip can project and retract from a mounting surface (10a) of the case (10) in a case (10) containing a reel (20) for winding the swinging yarn (1). In the downward swing cage having a stop needle (40) inserted in a state where the needle handle (42) protrudes from the back surface (10c) of the case (10),
The stop needle (40) is brought into contact with the engagement protrusion (42b) formed on the stop needle (40) at a position where the needle body (41) is completely accommodated in the case (10). A stopper (15c) for preventing the slipping in the backward direction;
A slider (15) that is integral with the stopper (15c) and is movably provided in the case (10), and forcibly displaces the stopper (15c) to a non-interference position with the engagement protrusion (42b);
A swing-down retainer provided with a stop needle replacement mechanism. A needle body (41) at the tip can project and retract from a mounting surface (10a) of the case (10) in a case (10) containing a reel (20) for winding the swinging yarn (1). In the downward swing cage having a stop needle (40) inserted in a state where the needle handle (42) protrudes from the back surface (10c) of the case (10),
The engagement protrusion (42b) formed on the stop needle (40) is engaged in a state in which the insertion and withdrawal of the stop needle (40) is allowed, and the interference with the engagement protrusion (42b). A leaf spring (18) in which a stopper (18a) displaced in the non-engagement direction is formed at the free end;
A slider (19) provided in a movable state on the case (10) to restrict displacement of the stopper (18a) in the non-engagement direction or to release the restriction;
A swing-down cage having a stop needle replacement mechanism.

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