JP5914146B2 - Auxiliary lock and joinery provided with the same - Google Patents

Description

  The present invention relates to an auxiliary lock and a fitting including the auxiliary lock, and more specifically, to an improvement in locking performance of the auxiliary lock.

  Conventionally, as an auxiliary lock attached to a sash window such as a single sliding window or a sliding window, an auxiliary lock configured such that a stopper protrudes from a saddle frame of a movable shoji is known (for example, see Patent Document 1). In this auxiliary lock, the stopper is always urged by an urging member such as a compression spring in a direction to be immersed in the collar frame. When restricting the opening width of the shoji by protruding the stopper, if a special key is inserted into the auxiliary lock and rotated, the wedge-shaped slider moves while contacting the stopper as the key rotates, and the slider Due to the wedge action, the stopper protrudes against the urging force of the urging member.

  According to such an auxiliary lock, when the key is rotated in the reverse direction to return the slider, the stopper is immersed in the collar frame by the urging force of the urging member. However, in practice, there is a case where it is possible to rotate while pressing the key insertion part with the abdomen of the fingertip without using a dedicated key, and it is possible to immerse the stopper without a key. Become. In addition, the rotation operation of the key insertion portion is performed in a direction to release the urging force of the urging member after being rotated by a predetermined amount, and is assisted by the urging force. Easy operation.

  On the other hand, as another auxiliary lock, there is an interlocking plate that slides in synchronization with key operation, and a long groove that functions as a cam groove is provided in the interlocking plate, and a sliding pin provided on the stopper is used as a cam follower in the long groove. There is also known an auxiliary lock for sliding (see, for example, Patent Document 2). In this auxiliary lock, a small hole is provided in the interlocking plate, and a ball of a ball plunger is applied to the small hole. With this configuration, in order to slide the interlocking plate, it is necessary to once push up the ball urged by the spring of the plunger. Therefore, a click feeling is generated by the drag during operation, and the operability can be improved.

Japanese Patent Laid-Open No. 2004-360312 JP 2006-63619 A

In Patent Document 1, since the key insertion part can be operated without a key, there is a problem in locking performance. In contrast to such Patent Document 1, a click feeling due to drag by a plunger ball or the like as in Patent Document 2 is provided. It is conceivable to improve the locking performance by imparting. In other words, by providing a feeling of clicking due to drag during operation, a large operating force is required temporarily at the start of operation, and it is sufficient to simply rotate while pressing the key insertion part with the abdomen of the fingertip. This makes it difficult to operate without a key and improves the locking performance.
However, since the structure becomes complicated by providing a click mechanism that generates a drag force, there is a possibility of problems in assembling property, durability, and cost.

  An object of the present invention is to provide an auxiliary lock capable of obtaining a click feeling due to drag with a simple structure and capable of improving the locking performance with certainty, and a fitting having the same.

The auxiliary lock of the present invention includes a base attached to a window frame or a shoji frame of a shoji arranged in the window frame, a slider arranged on one end side in the direction of finding the base, and the direction in which the base is found. A stopper disposed on the end side and projecting and retracting with respect to the base; a link having one end rotatably connected to the slider and the other end rotatably connected to the stopper; the slider and the base; An urging member disposed between the urging member and urging the slider toward the one end side so that the urging force continues to increase while the slider slides toward the other end side; And a rotatable cam that slides from the base through the link by sliding to the other end side against a biasing force of the member, and the cam is provided so that a key can be operated. And The slider has a pin that engages with a cam groove provided on the slider, and the cam groove of the slider is provided on a straight linear portion and an end portion of the linear portion corresponding to the moving end of the pin. The locking portion is recessed toward the side opposite to the biasing direction of the biasing member with respect to the linear portion, and in a direction of finding passing through the rotation center of the cam. It is characterized in that it is provided at a position shifted from the parallel line to the side beyond the movement range of the pin.

  According to the present invention, the end portion of the cam groove of the slider is provided with a locking portion for locking the cam pin, and this locking portion is recessed on the opposite side to the urging direction of the slider. If the cam is rotated from a state where the pin is locked to the locking portion, it is necessary to cause the pin to escape from the locking portion at the initial stage. A large operating force is required, which makes it difficult to operate without a key and improves the locking performance. Further, the locking portion may be cut out as an extension of the straight portion of the cam groove, and the structure is simple.

Further , the “parallel line” here is a virtual line.
When the stopper protrudes, the urging force of the urging member becomes maximum when the position of the pin is on the line passing through the rotation center of the cam and parallel to the direction of finding. For this reason, when a locking part is provided at a position beyond such a line, and the pin is locked to the locking part at that position, in order to release this locking state and immerse the stopper The pin must pass through the line, and the cam is rotated against the maximum urging force, making operation without a key more difficult. Also, if the pin is locked at a position beyond the above-mentioned line, the cam will be urged through the pin in the opposite direction from the return side (the side where the stopper is immersed). Even if an excessive external force acts on the immersive side of the stopper and the external force acts on the pin via the link and slider, the cam does not rotate to the return side, and the stopper easily immerses due to the external force. It is possible to reliably prevent such a problem.

In the auxiliary lock of the present invention, it is preferable that a plurality of the locking portions are provided.
When the stopper is protruded from the immersed state, if the rotation range of the key is large, the key must be rotated while breaking the posture, and the operability is poor. In the present invention, by providing a plurality of locking portions, the pin is locked to the locking portion while operating the key to the end, and once this locking state occurs, the hand is once released from the key and the key is held. If it is picked up again, the keys can be operated to the end with an easy posture and a posture that makes it easier to exert operational force, and the operability can be improved.
The joinery of the present invention is characterized by including any of the auxiliary locks described above, and as described above, the object of the present invention can be achieved.

  It is possible to provide an auxiliary lock with improved locking performance and a joinery equipped with the auxiliary lock.

The interior view which shows the single-sided window by which the auxiliary lock which concerns on one Embodiment of this invention was employ | adopted. It is a longitudinal cross-sectional view of the said sliding window, and the arrow line view seen from the arrow II-II of FIG. FIG. 3 is a transverse cross-sectional view of the one-way window, as viewed from the direction of arrows III-III in FIG. 1. Sectional drawing which shows the said auxiliary lock The disassembled perspective view which shows the said auxiliary | assistant lock. The enlarged view which shows the principal part of the said auxiliary lock. Explanatory drawing for demonstrating the motion of the said auxiliary | assistant lock. Explanatory drawing for demonstrating the initial stage of a motion of the said auxiliary | assistant lock. The enlarged view which shows the modification of the said principal part. The longitudinal cross-sectional view which shows the modification of the said sliding window. The cross-sectional view which shows the modification of the said sliding window.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
In FIG. 1 to FIG. 3, a sliding window 1 as a joinery according to the present embodiment is a window frame 10 that is built in an opening portion of a building frame, and a fixed that is fitted in the indoor side of the window frame 10 and attached in a killed state. A shoji 30 and a movable shoji 50 attached to the outside of the window frame 10 near the outdoor side so as to be opened and closed along the direction of finding are provided. An auxiliary lock 70 for limiting the opening width of the movable shoji 50 as necessary is provided on the upper portion of the window frame 10.

The window frame 10 has a configuration in which a pair of left and right vertical frames 11 and upper and lower upper frames 12 and a lower frame 13 are framed.
A vertical indoor piece 14 having a mounting pocket at the tip is provided on the indoor side of one vertical frame 11 shown on the right side in FIG. 3, and two locking pieces 15 and 16 are provided on the outdoor side. Yes.

  A vertically extending piece 17 is provided in the center of the upper frame 12 in the outdoor direction, and an upper indoor piece 18 having a mounting pocket is provided on the indoor side. A retaining material having a U-shaped cross section (not shown) is attached to the attachment pocket. Between the holding member and the hanging piece 17, the upper part of the fixed shoji 30 is held and an indoor upper holding groove 19 in which the auxiliary lock 70 is accommodated is provided on the hanging piece 17 and the outdoor side thereof. Between the formed upper room outer piece 20, it is the outdoor upper holding groove 21 in which the upper part of the movable shoji 50 is slidably held. The indoor upper holding groove 19 is closed by the upper groove cover 22 engaged from below except for the portion where the fixed shoji 30 and the auxiliary lock 70 are attached.

  In the center of the lower frame 13 in the indoor / outdoor direction, a rising piece 23 continuous along the direction of finding is provided, and a lower indoor piece 24 having a mounting pocket is provided on the indoor side. A retaining material having a U-shaped cross section (not shown) is also attached to the attachment pocket. Between this holding material and the upright piece 23, there is an indoor lower holding groove 25 in which the lower part of the fixed shoji 30 is held. In the indoor lower holding groove 25, except for the portion where the fixed shoji 30 is attached, the indoor lower holding groove 25 is closed by the lower groove cover 26 engaged from above. A rail 27 that is continuous along the direction of finding is provided on the outdoor side of the rising piece 23. The movable shoji 50 opens and closes when the door wheel 58 rolls on the rail 27.

  The stationary shoji 30 includes a summing frame 31 erected on the indoor side of the upright piece 23 at a substantially center in the direction of finding the window frame 10, and a rectangular panel 32 having four sides held. With. Each edge of the panel 32 includes the indoor upper holding groove 19 of the upper frame 12, the indoor lower holding groove 25 of the lower frame 13, the indoor vertical holding groove 33 provided in the vertical frame 31, and one vertical It is held by a room-side vertical holding groove 34 provided in the frame 11. At this time, the indoor vertical holding groove 33 of the vertical frame 31 is formed by a holding piece 35 integrally provided on the indoor side of the vertical frame 31 and an outer pushing edge 36 having an L-shaped cross section attached to the vertical frame 31. The The indoor-side vertical holding groove 34 of the vertical frame 11 is formed by a holding material 28 attached to the attachment pocket of the vertical indoor piece 14 and an outer pushing edge 29 having an L-shaped cross section that is locked to the locking pieces 15 and 16. The

  The movable shoji 50 has a configuration in which a panel 54 is fitted into an opening portion of a saddle frame in which left and right vertical rods 51 and upper and lower upper rods 52 and a lower rod 53 are assembled on four sides. Each of the flanges 51, 52, 53 is provided with a panel vertical holding groove 55, a panel upper holding groove 56, and a panel lower holding groove 57, and the four sides of the panel 54 are located in each holding groove 55, 56, 57. Retained. The lower door 53 is provided with the door wheel 58 described above. Of the pair of vertical rods 51, the vertical rod 51 facing the other vertical frame 11 (the vertical rod opposite to the summoning rod) has a hollow extending portion 59 extending to the indoor side. The extending portion 59 is close to and opposed to the vertical frame 31 in the direction of finding when the movable shoji 50 is opened. The extension portion 59 is provided with a lock 61 that engages with the vertical frame 11 when the movable shoji 50 is closed.

Hereinafter, the auxiliary lock 70 will be described in detail.
In FIGS. 1 and 2, the auxiliary lock 70 is a position corresponding to the indoor side of the movable shoji 50 when closed, and is accommodated in the indoor-side upper holding groove 19 of the upper frame 12. By making the auxiliary lock 70 function, the movable shoji 50 is prevented from opening beyond a predetermined opening width (for example, about 110 mm).

  2 and 4, a back plate 62 is disposed on the upper side of the upper surface portion 19 </ b> A that defines the indoor upper holding groove 19 of the upper frame 12. A mounting bracket 63 is attached to the lower side of the upper surface portion 19 </ b> A by screws that are screwed into the back plate 62. The mounting bracket 63 is provided with a concave portion that opens downward, and horizontal flanges are provided at both ends of the concave portion in the direction of finding. The auxiliary lock 70 is screwed to the flange while being fitted in the concave portion.

  4 and 5, the auxiliary lock 70 includes a box-like base 71 attached to the upper frame 12 in a state where the auxiliary lock 70 is fitted in the attachment bracket 63, and a slider 72 disposed on one end side in the finding direction in the base 71. A stopper 73 which is disposed on the other end side in the finding direction in the base 71 and protrudes and sinks with respect to the base 71, a link 74 connecting the slider 72 and the stopper 73, and one end side in the finding direction (stopper). A compression spring 75 as an urging member for urging to the opposite side of 73, a cam 76 for sliding the slider 72 to the other end against the urging force of the compression spring 75, a cam 76 and a stopper. And a cover 77 attached to the base 71 having an opening for projecting 73.

  Long holes 78 are provided in the pair of side walls of the base 71 along the direction of finding. The slider 72 is provided with a slide shaft 79 penetrating in the indoor / outdoor direction, and both ends of the slide shaft 79 are slidably engaged with the long holes 78. The slider 72 slides in the direction of finding together with the slide shaft 79 by the stroke defined by the long hole 78. A base end of a link 74 is attached to the slide shaft 79. A circular spring seat 81 is provided on the end surface portion of the slider 72 by piercing or the like. On the other hand, a spring seat 82 is provided on the upper surface portion of the base 71 by cutting and raising processing or the like. A compression spring 75 is disposed between the spring seats 81 and 82 in a compressed state.

  The stopper 73 is pivotally supported on the other end side of the base 71 via a rotation shaft 83. The distal end side of the link 74 is pivotally supported via the rotation shaft 84 closer to the slider 72 than the rotation shaft 83 of the stopper 73. The position of the rotation shaft 84 is located below the slide shaft 79 in a state where the stopper 73 is submerged in the base 71, and the slider 72 resists the biasing force of the compression spring 75 and is on the stopper 73 side. When the slide 74 is slid, the link 74 is rotated so that the tip side thereof is directed downward, and the stopper 73 is rotated downward and protrudes. On the contrary, when the slider 72 slides in the direction away from the stopper 73, the link 74 rotates so that the tip thereof faces upward, and the stopper 73 rotates upward and is immersed.

  The slider 72 slides as the cam 76 rotates. A key hole 85 having an arbitrary shape is provided on the lower surface of the cam 76. A dedicated key 40 is inserted into the key hole 85 from below, and is rotated within an angle range slightly exceeding 180 degrees. A pin 86 protruding upward is provided on the upper surface of the cam 76, and this pin 86 functions as a cam follower. The pin 86 is provided at a position eccentric with respect to the rotation center O of the cylindrical cam 76, and moves along an arcuate rotation locus in accordance with the key operation. The pin 86 engages with a slit 87 provided on the lower surface of the slider 72. Since the slit 87 functions as a cam groove, the slider 72 slides in the direction of finding as the pin 86 moves in an arc shape.

  Here, as shown in an enlarged view in FIG. 6, the slit 87 includes a straight linear portion 88 and a locking portion 89 provided on one end side of the linear portion. The locking portion 89 is notched and recessed with respect to the straight portion 88 in the direction opposite to the urging direction by the compression spring 75 (see the white arrow in the figure). In a state where the stopper 73 is completely immersed and a state where the stopper 73 is completely protruded, the pin 86 is locked to the locking portion 89. That is, the locking portion 89 is provided at a position corresponding to the moving end of the pin 86. Further, the locking portion 89 is provided at a position shifted by an angle θ1 on the side beyond the moving range of the pin 86 from the line AA parallel to the finding direction passing through the rotation center O of the cam 76. The pin 86 is locked to the locking portion 89 at a position below the line AA. Until the stopper 73 is rotated from the retracted state to the protruded state, the pin 86 is detached from the locking portion 89 at the start of the rotation operation of the cam 76, and the straight portion 88 of the slit 87 is moved up and down in the drawing. And re-enters the locking portion 89 at the end of the turning operation.

  Below, the change of the pin 86, the slider 72, the stopper 73, and the compression spring 75 accompanying rotation of the cam 76 is demonstrated based on FIG. In FIG. 7A, the slider 72 is farthest from the stopper 73, the tip end side of the link 74 is rotated upward, and the stopper 73 is immersed. At this time, the compression amount of the compression spring 75 is the smallest, and the pin 86 enters the engaging portion 89 of the slit 87.

  From this state, when the key 40 (FIG. 5) is inserted into the key insertion portion of the cam 76 and the cam 76 is rotated clockwise, the pin 86 is disengaged from the locking portion 89 as shown in FIG. , Start moving to draw an arc-shaped trajectory. As the cam 76 rotates, the pin 86 moves upward in the straight portion 88 of the slit 87 so as to press one inner edge 87A of the slit 87, and compresses the compression spring 75 while sliding the slider. 72 is slid to the stopper 73 side. Accordingly, the stopper 73 gradually begins to protrude downward.

  When the cam 76 is rotated by approximately 90 degrees, the movement of the pin 86 is reversed, and the cam 76 moves downward in the straight line portion 88 of the slit 87 (FIG. 7C). Even in this case, the pin 86 slides the slider 72 toward the stopper 73 while resisting the spring force of the compression spring 75. For this reason, the compression spring 75 is in a more compressed state, and the operating force of the key 40 required to rotate the cam 76 gradually increases.

  As shown in FIG. 7D, when the cam 76 is rotated about 180 degrees, the pin 86 reaches the corner portion 87B that is the boundary portion between the linear portion 88 and the locking portion 89 of the slit 87, and the slider 72 As the slide amount becomes maximum, the compression amount of the compression spring 75 becomes maximum. When the key 40 is further twisted and the cam 76 is slightly rotated from 180 degrees, the pin 86 enters the locking portion 89 and is locked. At this time, the compression amount of the compression spring 75 and the slide amount of the slider 72 slightly return from the maximum amount by the notch of the locking portion 89, but the stopper 73 protrudes completely and is provided on the stopper 73. The contact surface 73A is substantially vertical. When the extending portion 59 provided on the vertical shaft 51 of the movable shoji 50 comes into contact with the contact surface 73A, the opening width of the movable shoji 50 is limited.

  Next, the operation of returning the slider 72 and starting the immersion of the stopper 73 from the state in which the stopper 73 is completely projected and the pin 86 is locked to the locking portion 89 of the slit 87 will be described with reference to FIG. This will be described with reference to (A) and FIG.

  First, as shown in FIG. 8 (A), when the cam 76 is rotated counterclockwise by the angle θ2 from the state where the pin 86 enters the engaging portion 89, as shown in FIG. 8 (B). The pin 86 gets over the corner 87B and escapes. At this time, the slider 72 moves slightly toward the stopper 73 by the movement amount S against the spring force of the compression spring 75, and further compresses the compression spring 75. Thereafter, as the cam 76 rotates, the pin 86 starts to return along an arcuate rotation locus, and moves along the straight portion of the slit 87 upward in the drawing while being pressed by the inner edge 87A of the slit 87.

  In other words, when the cam 76 is returned and the stopper 73 is inserted, the pin 86 must first escape from the locking portion 89. For that purpose, it is necessary to once retract the compression spring 85 and move the slider 72 to the stopper 73 side so that the pin 86 gets over the corner portion 87B of the slit 87, and a large force is required to cause a click feeling due to drag. Is done. Therefore, it is difficult to return the cam 76 without the dedicated key 40.

  Although not shown, even when the stopper 73 is protruded from the immersed state, the pin 86 needs to first escape from the locking portion 89. At this time, the compression amount of the compression spring 75 is minimized. Therefore, the force required to move the slider 72 against the spring force of the compression spring 75 for the pin 86 to get over the corner portion 87B is small, and the click feeling is also small. In this case, at first, the cam 76 can be rotated without the key 40. However, as long as the cam 76 is easy to move in the direction in which the stopper 73 protrudes, there is no problem in locking performance.

The embodiment described above has the following effects.
(1) That is, in the auxiliary lock 70, the end portion of the slit 87 of the slider 72 is provided with a locking portion 89 that is recessed in a direction against the urging force of the compression spring 75, and the stopper 73 protrudes completely. Then, since the pin 86 of the cam 76 is locked to the locking portion 89, when the cam 76 is rotated to the return side and the stopper 73 is to be immersed, the first operation of the rotation operation is performed. In this stage, the pin 86 needs to be escaped from the locking portion 89 with a large operating force. Therefore, in order to exert such an operation force, the key 40 is required, and even if the cam 76 is pressed by the belly of the finger, it can be prevented from rotating, and the locking performance can be improved.

(2) Further, when the cam 76 is rotated, the pin 86 is once released from the locking portion 89 with a large operating force, so that it is possible to obtain a click feeling due to a drag force during the escape. Further, the locking portion 89 can be formed by cutting out as an extension of the linear portion 88 of the slit 87, and the processing and structure can be simplified.

(3) Further, in the auxiliary lock 70, when the stopper 73 protrudes and the position of the pin 86 is on a line A-A parallel to the direction of passing through the rotation center O of the cam 76, the compression spring 85 The urging power of is maximized. Accordingly, when the pin 86 is locked to the locking portion 89 at a position beyond the line AA, the pin 86 is moved to the line AA in order to release the locked state and immerse the stopper 73. Therefore, the cam 76 is rotated against the maximum urging force, and the operation without the key 40 can be made more difficult.

(4) If the pin 86 is locked at a position beyond the line AA, the cam 76 is urged through the pin 86 in the direction opposite to the return side. Thus, even if an excessive external force acts on the stopper 73 on the immersive side and the external force acts on the pin 86 via the link 74 and the slider 72, the cam 76 does not rotate to the return side, and the stopper 73 is caused by the external force. It is possible to reliably prevent problems such as easy immersion.

Note that the present invention is not limited to the above-described embodiment, and modifications and the like within a range in which the object of the present invention can be achieved are included in the present invention.
For example, in the above-described embodiment, the locking portion 89 is provided only on the moving end side of the slit 87, but the position in the middle of movement, that is, the midway position of the straight portion of the slit 87, or the locking portion 89 is provided. You may provide another latching | locking part in the edge part on the opposite side to the edge part which exists. FIG. 9 shows an example in which a locking portion 91 that is locked when the cam 76 is rotated about 90 degrees is provided. According to such an example, the pin 86 is inserted into the locking portion 91 by inserting the key 40 and rotating the cam 76 by about 90 degrees which is half of the whole. Therefore, the cam 76 can be rotated to the end with a comfortable posture or a posture capable of exerting more operating force by re-picking the key 40 with the signal of the locking to the locking portion 91 as a signal. Such a structure is not limited to the cam 76 having a rotation range of about 180 degrees, but is effective when a cam that rotates in a larger rotation range such as 270 degrees or 360 degrees is employed.

In the embodiment, the auxiliary lock 70 is provided in the indoor-side upper holding groove 19 of the upper frame 12, but as shown in FIGS. 10 and 11, the auxiliary lock 70 is provided in the outdoor-side upper holding groove 21 of the upper frame 12. Also good. Specifically, the auxiliary lock 70 is inserted from below into the opening 21B of the upper surface portion 21A that defines and forms the outdoor upper holding groove 21, and the flange is attached with a screw that is screwed into the back plate 92. The protruding stopper 73 comes into contact with an end face of the resin block 93 provided on the upper collar 52.
In such an auxiliary lock 70, the protruding stopper 73 is hidden by the upper frame 12 of the window frame 10 and the upper collar 52 of the movable shoji 50, but if the cam 76 is also hidden by the movable shoji 50, the key 40 is inserted. Therefore, the cam 76 is provided so as to be shifted to an exposed position where it does not interfere with the vertical rod 51 with respect to the movable shoji 50 opened within the opening restriction width.

  In the above-described embodiment, the auxiliary lock 70 has been described as an example provided in the single sliding window 1, but the auxiliary lock of the present invention may be provided in the sliding window. In such a case, for example, in the case of a sliding window having a pair of movable shojis, a pair of auxiliary locks are provided corresponding to each shoji with respect to the upper frame of the window frame, or a saddle frame of one shoji One (upper or lower arm) will be provided.

  In the above embodiment, the compression spring 85 is used as the biasing member of the present invention. However, if the arrangement position is changed, a tension spring can be used. What kind of urging member is used to urge the slider may be arbitrarily determined in the implementation.

  DESCRIPTION OF SYMBOLS 1 ... Sliding window which is joinery, 10 ... Window frame, 40 ... Key, 70 ... Auxiliary lock, 71 ... Base, 72 ... Slider, 73 ... Stopper, 74 ... Link, 75 ... Compression spring which is urging member, 76 ... Cam, 86 ... pin, 87 ... slit slit as cam groove, 88 ... straight line portion, 89 ... locking portion, AA ... line, O ... rotation center.

Claims (3)

A base attached to a window frame or a shoji frame of a shoji disposed in the window frame;
A slider disposed on one end side in the direction of finding the base;
A stopper disposed on the other end side in the direction of finding the base and projecting and sinking with respect to the base;
A link having one end rotatably connected to the slider and the other end rotatably connected to the stopper;
An urging member disposed between the slider and the base to urge the slider toward the one end, and to continue to increase the urging force while the slider slides toward the other end;
A rotatable cam that slides the slider against the urging force of the urging member toward the other end side to project the stopper from the base via the link;
The cam is provided so as to be capable of key operation, and has a pin engaged with a cam groove provided in the slider,
The slider cam groove is composed of a linear straight portion and a locking portion provided at an end of the linear portion corresponding to the moving end of the pin,
The locking portion is recessed toward the opposite side of the urging direction of the urging member with respect to the linear portion, and more than the line parallel to the locating direction passing through the rotation center of the cam. Auxiliary lock provided at a position shifted to the side beyond the moving range. The locking portion includes an auxiliary lock according to claim 1 which is plurality. A fitting auxiliary locks is provided according to claim 1 or claim 2.

Images