JP2008179976A - Strike hole adjusting mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a strike hole adjusting mechanism, without exposing a tool fitting part of a threadedly engaging fastening member on a strike plate surface and in a strike box recessed part, when opening a door. <P>SOLUTION: This strike hole adjusting mechanism has a tabular strike plate 15 fixed to the non-opening-closing body 11 side and bored with an entering strike hole 23 of a lock bolt of advancing-retreating from the door opening-closing end, a strike box 17 having a fixing surface positioned between the strike plate 15 and a non-opening-closing body 11, fixed to the non-opening-closing body 11 and fixing the strike plate 15 by a threadedly engaging means 29 and having a recessed part 43 having a step part lower than the fixing surface, recessed lower than the step part and capable of making the lock bolt enter, and an adjusting plate 19 having the butting edge 45b abutting on a side part of the lock bolt, freely movable in the lateral direction between the strike box 17 and the strike plate 15 and fastened and fixed to the strike box 17 by regulating the movement via the threadedly engaging fastening member 21. The tool fitting part 49a of the threadedly engaging fastening member 21 is arranged in the step part, and is covered with the strike plate 15. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a strike hole adjusting mechanism in which a side stopper position of a lock bolt protruding from a door opening / closing end can be adjusted in the left-right direction.

  The door is referred to as a latch bolt, a dead bolt, a dead bolt, a latch bolt serving as a dead bolt, or a gremon lock latch, or a lock latch means (hereinafter referred to as “lock bolt”) appropriately combined with these. ) Is locked to a door frame or another door (hereinafter referred to as “non-opening / closing body”) to allow the door to be closed and locked. The lock bolt protrudes from the door opening / closing end and enters the strike hole of the strike plate fixed to the non-opening / closing body so that the side of the lock bolt abuts against the strike edge of the strike hole and locks the door so that it cannot be opened. .

In this type of locking structure, there is a gap between the lock bolt and the stop edge due to the installation of the door frame and the door and the installation / manufacturing error of the locking device. May occur. For example, Patent Document 1 discloses an adjustable strike that solves such a problem. With this adjustable strike, you can easily adjust the horizontal position of the inner case that has the engaging part (stopping edge) to the lock bolt by simply turning the adjustment screw with a tool such as a screwdriver. It is configured to be eliminated.
JP 10-102839 A

  However, the strike hole adjustment mechanism employed in the conventional adjustable strike described above is provided with a tool engagement portion on the head of the adjustment screw, and the tool engagement portion is exposed in the inner case. At the time of opening, a large number of screws such as screwing means (screws) for fixing the strike plate and adjusting screws are exposed, and there is a problem that the appearance is deteriorated. In addition, the adjustment screw may be mischievous due to the tool engaging portion being exposed when the door is opened. Further, if the tool engaging portion is operated maliciously to cause rattling in the door, unauthorized locking can be released, and there is a concern that the crime prevention property may be lowered.

  The present invention has been made in view of the above situation, and provides a strike hole adjusting mechanism in which a tool engagement portion of a screw fastening member does not appear on a strike plate surface or a trowel recess when a door is opened. The purpose is to improve the appearance, prevent mischief of the tool attachment part, and improve crime prevention.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The strike hole adjusting mechanism according to claim 1 of the present invention includes a plate-like strike plate 15 that is fixed to the non-opening / closing body 11 and has a strike hole 25 into which a lock bolt 13 that advances and retreats from the door opening / closing end 23a is provided. ,
Between the strike plate 15 and the non-opening / closing body 11, the fixing plate 33 is fixed to the non-opening / closing body 11 and fixed to the strike plate 15 by the screwing means 29. Troyoke 17 having a lower step portion 41 and having a recessed portion 43 that is recessed lower than the step portion 41 and into which the lock bolt 13 can enter;
The lock bolt 13 has a stop edge 45b against which the side of the lock bolt 13 abuts, and is movable in the left-right direction between the trolley 17 and the strike plate 15, and the movement is restricted via the screwing fastening member 21. An adjustment plate 19 fastened and fixed to the troyoke 17;
With
A tool engaging portion 49a of the screw fastening member 21 is disposed on the step portion 41 and covered with the strike plate 15.

  In this strike hole adjusting mechanism, when the door 23 is opened, the tool engaging portion 49a housed in the step portion 41 of the troyoke 17 is covered by the strike plate 15, and the tool engagement portion 49 is placed on the surface of the strike plate 15 or in the trowel recess 43. The landing portion 49a does not appear. Therefore, to operate the tool engaging portion 49a, first, the strike plate 15 is removed and the tool engaging portion 49a is exposed, and the tool engaging portion 49a becomes inoperable in a normal state. That is, the tool engaging portion 49a of the screw fastening member 21 is not exposed, and the appearance of the strike plate 15 as an appearance can be improved.

The strike hole adjusting mechanism according to claim 2, wherein the screw fastening member 21 is
A screw 49 penetrating the adjustment plate 19 and the troyoke 17 and having the tool engaging portion 49a formed at one end thereof;
A nut member 51 screwed into the screw 49 on the back of the troyoke 17;
The strike hole adjusting mechanism according to claim 1, comprising:

  In this strike hole adjusting mechanism, the screwing means for fixing the strike plate 15 to the troyoke 17 and the screwing fastening member 21 are screws 29 and 49 having the same type of tool engaging portion at one end (head). After the strike plate 15 is removed, the work can be performed using a common tool (such as a cross-shaped screwdriver) on the head 49 (tool engaging portion) 49a of the screw 49 exposed to the stepped portion 41. Yes.

In the strike hole adjusting mechanism according to claim 3, an upper and lower elongated hole 57 through which the screw 49 passes is formed in the adjustment plate 19.
The trowel 17 is formed with an oblique long hole 59 through which the screw 49 passes.

  In this strike hole adjusting mechanism, the screw 49 is moved in the vertical direction through the upper and lower elongated holes 57 of the adjustment plate 19 on the front side, and the screw 49 is inserted into the oblique long hole 59 of the troyoke 17 located on the back of the adjustment plate 19. The adjustment plate 19 can be moved in the left-right direction with respect to the fixed trolley 17 by being moved obliquely along.

  In the strike hole adjusting mechanism according to claim 4, a rotation prevention plate 61 that restricts the rotation of the nut member 51 by abutting the outer periphery of the nut member 51 on the back surface of the troyoke 17 along the oblique elongated hole 59. It is characterized by being provided.

  In this strike hole adjusting mechanism, even when the nut member 51 is moved along the oblique elongated hole 59 when the screw 49 is released and fastened, the outer periphery of the nut member 51 always abuts against the rotation prevention plate 61 and rotates. The state is restricted, and the idling of the nut member 51 is prevented at an arbitrary adjustment position.

  The strike hole adjusting mechanism according to claim 5 is characterized in that the rotation prevention plate 61 is disposed on the side of the stop edge 45b in the left-right direction across the nut member 51.

  In this strike hole adjusting mechanism, when a force in the opening direction is applied to the door 23 in a state where the side portion of the lock bolt 13 protruding from the door 23 is in contact with the stop edge 45b (locked state), the adjustment plate 19 is pressed against the side of the lock bolt 13, and the nut member 51 abuts against the rotation prevention plate 61 arranged in the pressing direction, so that the rotation prevention plate 61 is loaded from the screw 49. It becomes a receiving member, and the lock bolt pressing strength of the adjusting plate 19 is increased. In the case where the rotation prevention plate 61 is disposed on the opposite side, only the action of the rotation stop can be obtained, and when the stopper edge 45b is pressed against the side of the lock bolt 13, the screw 49 is rotated. Therefore, the screw 49 can be easily moved along the oblique long hole 59.

  According to the strike hole adjusting mechanism of the first aspect of the present invention, the adjustment that is movable in the left-right direction between the troyoke and the strike plate, is restricted from moving through the screwing fastening member, and is fastened and fixed to the troyoke. Since the tool engaging portion of the screw fastening member is disposed at the step portion and is covered by the strike plate, the tool engagement of the screw fastening member is placed on the surface of the strike plate or in the recess of the trowel when the door is opened. The wearing part does not appear and the appearance can be improved. Moreover, it can prevent that a tool engaging part is mischievous. Furthermore, since it becomes difficult to cause the backlash of the door by operating the tool engaging portion in a malicious manner, it is possible to improve crime prevention.

  According to the strike hole adjusting mechanism according to claim 2, the screwing fastening member includes a screw that passes through the adjusting plate and the troyoke and has a tool engaging portion at one end thereof, and a nut that is screwed into the screw on the back of the troyoke Because it consists of members, after removing the strike plate, the head of the screw that appears on the step can be rotated using a cross tool etc., which is a general tool, And the adjustment work of the adjustment plate can be easily performed using one tool.

  According to the strike hole adjusting mechanism according to claim 3, since the upper and lower elongated holes through which the screw passes are formed in the adjusting plate and the oblique elongated hole through which the screw passes are formed in the troyoke, the upper and lower length of the adjusting plate located in front is formed. By moving the screw up and down in the hole, the screw moves along the oblique elongated hole of the troyoke, and as a result, the adjustment plate can be moved in the left and right direction with respect to the troyoke. In addition, since the structure does not include a long hole in the left-right direction that is the same as the moving direction of the adjustment plate, the fixing strength of the adjustment plate after screw fastening can be increased.

  According to the strike hole adjusting mechanism of the fourth aspect of the present invention, the rotation prevention plate that contacts the outer periphery of the nut member and restricts the rotation of the nut member is provided on the back surface of the troyoke along the oblique elongated hole. At the time of release and fastening, the nut member can be prevented from idling at an arbitrary adjustment position, and the adjustment work of the adjustment plate can be facilitated.

  According to the strike hole adjusting mechanism according to claim 5, since the rotation prevention plate is disposed on the side of the left and right stop edges sandwiching the nut member, in the state where the adjustment plate is fastened by the screw and the nut member, the adjustment plate Even if the stopper edge is pressed against the side of the lock bolt, the nut member comes into contact with the rotation prevention plate disposed in the pressing direction, and the lock bolt pressing resistance of the adjustment plate can be increased. As a result, even when an excessive opening force is applied to the door at the time of locking, it is difficult for the door to rattle due to the movement of the adjustment plate, and the crime prevention can be improved.

Hereinafter, preferred embodiments of a strike hole adjusting mechanism according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view of an adjustable strike equipped with a strike hole adjusting mechanism according to the present invention, with a strike plate removed, FIG. 2 is a perspective view of an adjustable strike with a strike plate attached, and FIG. 3 is shown in FIG. 4 is an exploded perspective view of the adjustable strike, FIG. 4 is an AA arrow view of FIG. 2 with a lock bolt inserted, FIG. 5 is a rear view of Troyoke, and FIG. 6 is an BB arrow view of FIG. .
The adjustable strike 100 provided with the strike hole adjusting mechanism according to the present embodiment is provided on a door frame that is a non-opening / closing body or another door of a double door. In the present embodiment, an example in which the non-opening / closing body is the door frame 11 shown in FIG. 1 will be described. In addition, the lock bolt inserted into the adjustable strike 100 may be a latch bolt (including a dead bolt), a dead bolt, a gremon lock locking rod, or a locking locking means appropriately combining these. it can. In the present embodiment, an example in which the lock bolt is a dead bolt / latch bolt (hereinafter referred to as a “combination bolt”) 13 (see FIG. 4) will be described.

  The adjustable strike 100 has a strike plate 15, a trolley 17, an adjustment plate 19, and a screw fastening member 21 as main components. The strike plate 15 is fixed to the door frame 11 side, and is formed in a flat plate shape having a rectangular strike hole 25 into which the combined bolt 13 that advances and retreats from the open / close end 23a of the door 23 enters. Further, the strike plate 15 is provided with a pair of fixing holes 27, 27 on the upper and lower sides of the strike hole 25, and the fixing holes 27, 27 are screwing means (screws) 29, 29 for fixing the strike plate 15 to the troyoke 17. Is inserted. In addition, an R surface 31 is formed on the vertical side of one of the strike plates 15 (right side in FIG. 1), and the R surface 31 comes into contact with the inclined surface of the combined bolt 13 to retract the combined bolt 13.

  The trowel 17 is disposed between the strike plate 15 and the door frame 11, and is inserted into and fixed to the mounting hole 11 a of the door frame 11. Fixing surfaces 33 and 33 are formed on the upper and lower ends of the troyoke 17. The fixing surfaces 33 and 33 are fixed holes 37 and 37 through which fixing screws 35 and 35 are inserted, and female screws 39 and screws 29 and 29 are screwed together. 39. The troyoke 17 is fixed to the door frame 11 by screwing the fixing screws 35, 35 inserted through the fixing holes 37, 37 into the screw holes 11b, 11b. The strike plate 15 is fixed to the fixing surfaces 33 and 33 by screws 29 and 29. Trojoke 17 is formed with step portions 41 and 41 lower than the fixed surfaces 33 and 33, and the step portions 41 and 41 (see FIG. 3) are connected to the respective fixed surfaces 33 and 33. The Troyoke 17 is provided with a recess 43 having a lower shape than the step portions 41 and 41, and the recess 43 forms a recess space into which the combined bolt 13 can enter.

  The adjusting plate 19 is formed with a pair of spaced edge 45a, 45b which are spaced apart from each other, and allows the combined bolt 13 to enter between the edge 45a, 45b. The sloping side of the dual-purpose bolt 13 faces the stop edge 45a, and the vertical side of the double-use bolt 13 abuts on the stop edge 45b. Adhering pieces 47 and 47 (see FIG. 3) are arranged on the upper and lower sides of the adjustment plate 19 across the stopper edges 45 a and 45 b, and the adhering pieces 47 and 47 can be screwed to the troyoke 17 by the screwing fastening member 21. . In other words, the adjustment plate 19 has stop edges 45 a and 45 b against which the side portions of the dual-purpose bolt 13 abut, and is freely movable in the left-right direction between the troyoke 17 and the strike plate 15, and is connected via the screw fastening member 21. Therefore, the movement is restricted and fastened and fixed to the troyoke 17.

  The screw fastening member 21 includes a screw 49 penetrating the adjustment plate 19 and the troyo-ke 17 and having a tool engaging portion 49a formed at one end thereof, and a nut member 51 screwed to the screw 49 on the back surface of the tro-yoke 17. The tool engaging portion 49a engages, for example, a cross driver, which is a tool, and enables the screw 49 to be fastened / unfastened. In the present embodiment, the nut member 51 is formed in a wedge shape. The nut member 51 may be a normal hex nut.

  The screws 49, 49 inserted into the upper and lower elongated holes 57, 57 of the adjustment plate 19 are housed in the step portions 41, 41 of the troyoke 17 together with the fixing pieces 47, 47. Therefore, the strike plate 15 is fixed to the fixing surfaces 33 and 33 of the troyoke 17 so that the tool engaging portions 49a of the screws 49 and 49 are covered with the strike plate 15 and are displayed on the outer appearance of the adjustable strike 100. It is supposed not to. That is, as shown in FIG. 2, only the screws 29 and 29 are exposed on the surface of the strike plate 15 as screw fastening members.

  In the present embodiment, the screwing means (screws 29, 29) for fixing the strike plate 15 to the trolley 17 and the screwing fastening members (screws 49, 49) form the same type of tool engaging portion at one end (head). After the strike plate 15 is removed, a general tool (such as a cross-shaped screwdriver) is used against the heads of the screws 49 and 49 that appear on the step portions 41 and 41. Work can be done. Thereby, the removal operation of the strike plate 15 and the adjustment operation of the adjustment plate 19 can be easily performed using one tool. A spring washer 53 and a flat washer 55 are preferably provided between the screws 49 and 49 and the fixing pieces 47 and 47.

  The adjustment plate 19 is formed with upper and lower elongated holes 57 and 57 through which the screws 49 and 49 pass. In addition, slanted long holes 59 and 59 through which the screws 49 and 49 pass are formed in the troyoke 17. That is, the screws 49 and 49 are moved in the vertical direction by the upper and lower elongated holes 57 and 57 of the adjustment plate 19, and the screws 49 and 49 are moved obliquely along the oblique elongated holes 59 and 59 of the troyoke 17. Thus, the adjustment plate 19 is movable in the left-right direction with respect to the trolley 17 fixed to the door frame 11. The upper and lower elongated holes 57 and 57 and the oblique elongated holes 59 and 59 according to the present embodiment enable an adjustment range of about 6 mm in the left-right direction of the adjustment plate 19. Further, in this configuration, since the configuration does not include a slot in the left-right direction that is in the same direction as the moving direction of the adjustment plate 19, the fixing strength of the adjustment plate 19 after screw fastening, that is, the dual-purpose bolt 13 is attached to the adjustment plate 19. The strength with respect to the direction of stopping can be increased.

  As shown in FIGS. 5 and 6, rotation preventing plates 61, 61 that restrict the rotation of the nut member 51 by contacting the outer periphery of the nut member 51 along the oblique elongated holes 59, 59 on the back surface of the troyoke 17. It is fixed. Therefore, even when the nut member 51 is moved along the slanted long holes 59 and 59 when the screws 49 and 49 are unfastened and fastened, the outer periphery of the nut member 51 always has the inclined surfaces 61a and 61a of the rotation prevention plates 61 and 61. It will be in the state where rotation was controlled in contact with. Thereby, the idling of the nut member 51 is prevented at an arbitrary adjustment position, and the adjustment work of the adjustment plate 19 can be easily performed.

  Further, the rotation prevention plates 61 and 61 are disposed on the side of the side edge 45b (the edge to which the vertical side portion of the combined bolt 13 abuts) sandwiching the nut member 51 therebetween. When the vertical side portion of the dual-purpose bolt 13 protruding from the door 23 is in contact with the stop edge 45b (locked state) (see FIG. 4) (see FIG. 4), when a force in the opening direction is applied to the door 23, the adjusting plate 19 The locking edge 45b is pressed against the vertical side portion of the dual-purpose bolt 13, but the nut member 51 abuts against the rotation blocking plate 61 disposed in the pressing direction (left direction in FIG. 5), whereby the rotation blocking plate 61 becomes a load receiving member from the screw 49, and the lock bolt pressing strength of the adjusting plate 19 is increased.

  In the case where the rotation prevention plate 61 is disposed on the opposite side (the right side in FIG. 5), only the operation of the rotation stopper can be obtained, and the stopper edge 45 b is pressed against the vertical side portion of the combined bolt 13. Then, the screw 49 is separated from the rotation prevention plate 61, and the screw 49 becomes easy to move along the oblique long hole 59. In this structure, such a malfunction is prevented, and even if an excessive opening force is applied to the door 23 at the time of locking, it is difficult for the door 23 to be rattled due to the movement of the adjustment plate 19 and the crime prevention performance is improved. be able to.

Next, the operation of the strike hole adjusting mechanism will be described.
FIG. 7 is an explanatory view of the operation when the adjustment plate is moved to the right end. FIG. 7A is a front view with the strike plate removed, and FIG. FIG. 4 is an explanatory view of the operation when moved to the left end, in which a front view with the strike plate removed is shown in (a), and a substantially central sectional view is shown in (b).
In the adjustable strike 100, the trolley 17 having the adjustment plate 19 fixed in advance with screws 49, 49, a nut member 51, etc. is fixed to the door frame 11 using fixing screws 35, 35. In the initial adjustment state, for example, as shown in FIG. 7, the adjustment plate 19 is set to the right end. If the troyoke 17 is fixed, the strike plate 15 is fixed to the troyoke 17 with screws 29 and 29 in the state shown in FIG.

  Next, the door 23 is closed, and the combined bolt 13 enters the recess 43 of the troyoke 17 (locked state or the like). In this state, for example, if there is a gap between the door frame 11 and the door 23, the vertical side portion that is the surface of the dual-purpose bolt 13 in the door opening direction comes into contact with the stop edge 45 b. From the position, rattling occurs for the gap. This looseness is caused by construction errors of joinery, dimensional tolerances of products, distortion, or the shape and material of the packing provided on the door frame 11.

  When this rattling occurs, the screws 29 and 29 are released from the fastening, the strike plate 15 is removed, and the screws 49 and 49 that fix the adjustment plate 19 are exposed. Next, the screws 49, 49 are slightly loosened with the same tool used for releasing the fastening of the screws 29, 29, and as shown in FIG. 8, the adjustment plate 19 is moved to the left in the figure to fasten the screws 49, 49. To do. At this time, since the rotation of the nut member 51 screwed to the screws 49 and 49 is blocked by the rotation blocking plates 61 and 61, only the screws 49 and 49 are operated with the troyoke 17 fixed. Thus, movement adjustment of the adjustment plate 19 can be performed.

  When the position adjustment of the adjustment plate 19 is completed, the strike plate 15 is fixed to the troyoke 17 with the screws 29 and 29, so that the screws 49 and 49 are covered with the strike plate 15 and the adjustment operation is completed. In the adjustable strike 100 that has been adjusted, the position where the vertical side portion of the dual-purpose bolt 13 abuts is the amount before the adjustment since the stop edge 45b is moved in the direction approaching the door frame 11 (the left direction in FIG. 8). Also moves in a direction approaching the door frame 11. As a result, the excess gap between the door frame 11 and the door 23 which has been generated at the beginning is removed, and the door 23 in the closed state is not rattled.

  When the door 23 is opened, the tool engaging portion 49 a accommodated in the step portions 41, 41 of the troyoke 17 is covered with the strike plate 15, and the tool engagement portion 49 is placed on the surface of the strike plate 15 or in the recess 43 of the troyoke 17. The landing portion 49a does not appear. Accordingly, in the normal state, the tool engaging portion 49a becomes inoperable.

  As described above, according to the strike hole adjusting mechanism, the adjustment that is movable in the left-right direction between the troyoke 17 and the strike plate 15 and that is restricted from moving through the screws 49 and 49 and fastened to the troyoke 17 is fixed. Since the plate 19 is provided and the tool engaging portions 49a of the screws 49, 49 are disposed on the step portions 41, 41 and covered with the strike plate 15, the plate 15 of the strike 15 and the trowel recess 43 are formed when the door 23 is opened. The tool engaging portions 49a of the screws 49, 49 are not exposed, and the appearance can be improved. Moreover, it can prevent that the tool engaging part 49a is mischievous. Furthermore, since it becomes difficult to cause the door 23 to rattle by operating the tool engaging portion 49a in a malicious manner, it is possible to improve crime prevention.

  In the above embodiment, the case where the lock bolt is a dead bolt / latch bolt has been described as an example. However, the strike hole adjusting mechanism according to the present invention has two lock bolts, a latch bolt and a dead bolt. It is also possible to provide the strike hole adjusting mechanism for both lock bolts.

  Moreover, even if the strike hole adjusting mechanism according to the present invention is employed in a locking hole into which a locking rod of a Gremon lock, for example, other than a dead bolt or a latch bolt is inserted, the same effect as the above effect can be obtained.

It is a perspective view of the state where the strike plate of the adjustable strike provided with the strike hole adjustment mechanism concerning the present invention was removed. It is a perspective view of the adjustable strike which attached the strike board. It is a disassembled perspective view of the adjustable strike shown in FIG. It is an AA arrow line view of Drawing 2 in which a lock bolt was inserted. It is a rear view of Troyoke. It is a BB arrow line view of FIG. It is operation | movement explanatory drawing by which the adjustment board was moved to the right end, and is the figure which showed the front view in the state which removed the strike board in (a), and the substantially center sectional view in (b). It is operation | movement explanatory drawing by which the adjustment board was moved to the left end, and is the figure which showed the front view in the state which removed the strike board in (a), and the substantially center sectional view in (b).

Explanation of symbols

11 ... Non-opening / closing body (door frame)
13 ... Lock bolt (combined bolt)
DESCRIPTION OF SYMBOLS 15 ... Strike board 17 ... Troyoke 19 ... Adjustment board 21 ... Screwing fastening member 23 ... Door 23a ... Door opening / closing end 25 ... Strike hole 29 ... Screwing means 33 ... Fixing surface 41 ... Step part 43 ... Recess 45a, 45b ... Impact Stopper 49 ... Screwed fastening member (screw)
49a ... Tool engaging portion 51 ... Screw fastening member (nut member)
57 ... Vertical hole 59 ... Oblique hole 61 ... Anti-rotation plate 100 ... Adjustable strike

Claims (5)

A plate-like strike plate fixed on the non-opening / closing body side and having a strike hole into which a lock bolt that advances and retreats from the door opening / closing end is formed;
A fixing surface positioned between the strike plate and the non-opening / closing member, fixed to the non-opening / closing member and fixed to the strike plate by screwing means, and having a step portion lower than the fixing surface; Troyoke that has a recess recessed below the step and into which the lock bolt can enter,
The lock bolt has an abutting edge against which the side of the lock bolt comes into contact, and is freely movable in the left-right direction between the troyoke and the strike plate, and the movement is restricted and fixed to the troyoke through a threaded fastening member. An adjusting plate,
With
A strike hole adjusting mechanism, wherein a tool engaging portion of the screwing fastening member is disposed on the stepped portion and covered with the strike plate. The screw fastening member is
A screw that penetrates the adjusting plate and the troyoke to form the tool engaging portion at one end;
A nut member screwed onto the screw at the back of the troyoke,
The strike hole adjusting mechanism according to claim 1, comprising: The adjustment plate is formed with a vertically long hole through which the screw passes,
The strike hole adjusting mechanism according to claim 2, wherein a slanted long hole through which the screw passes is formed in the trowel.   The strike hole according to claim 3, wherein a rotation prevention plate is provided on the back surface of the troyoke along the oblique elongated hole so that an outer periphery of the nut member abuts and restricts rotation of the nut member. Adjustment mechanism.   The strike hole adjusting mechanism according to claim 4, wherein the rotation preventing plate is disposed on the side of the stopper edge in the left-right direction across the nut member.

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