JP2004305619A - Handle mechanism for drawer type storage - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To create unified beauty in terms of design by performing vertical alignment with the handle of a double swing door type storage, and to enable a user to perform an operation by one hand at an arbitrary position. <P>SOLUTION: The handle mechanism of a drawer type storage is provided with: a pair of horizontal handle levers 8 whose middle part is supported so as to be rotatable in a front and rear direction in the neighborhood of the upper/lower end at the internal center of the front board 3a of a drawer 3; the vertical handle 6 positioned at the front center of the front board 3a and separated from the front surface of the front board so as to connect the tip ends of the upper and lower handle levers 8, 8; a driven shaft 15 supported inside the front board 3a so as to be rotated linked with the rocking of the handle levers 8; a pair of right and left rocking latch pieces 25 supported in a rear part at each end of the front board 3a so as to be rotatable and provided with a latch receiving part 26 at the tip end; a pair of latch pawls 2, 2 arranged on the inner surface at both sides of a storage case 1a so as to be engaged with each latch receiving part 26; and an energizing means for energizing the rocking latch pieces 25 toward the latch pawls 2. The rocking latch pieces 25 are disengaged from the latch pawls 2 linked with the operation of the handle 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a drawer-type storage puller technique, and more specifically, is located at the front center of the front plate of each drawer of the drawer-type storage and forward with a gap between the front plate and the front plate. A vertical puller whose upper and lower ends are rotatably supported, and a latch mechanism that operates in conjunction with the operation of the puller. The present invention relates to a structure of a puller that can be operated with any one hand.
[0002]
[Prior art]
The puller of the conventional horizontally long drawer type storage is a form in which a pair of horizontal pullers is provided on the left and right sides of the front plate of the drawer. The puller of this conventional horizontally long drawer-type storage is operated with both hands and cannot be operated with one hand. In addition, when pulling out the lower drawer, it is necessary to bend down and pull out, and when pulling out the upper drawer, there are inconveniences such as that a person of short stature involves a little difficulty. In addition, there is an inconvenience that when the user cannot use both hands freely, for example, by holding an object in one hand, or a physically handicapped person who cannot use one hand cannot perform the operation of pulling out the horizontally long drawer as described above.
[0003]
On the other hand, in the case of stacking a storage with a double door on the upper side of a horizontally long drawer type storage, for example, the upper storage is a vertical pull that covers almost the entire area of the mating portion of the double door developed by the present applicant. In the case of a storage cabinet with double doors with hands, the puller of the upper storage is a vertical puller that extends over the upper and lower ends of the storage, while the puller of the drawer of the lower storage is horizontal. It is a form in which one pair is provided left and right apart, and the upper and lower storages have a dissonant appearance, giving a sense of discomfort. In such a case, align the puller of the drawer of the lower storage with the puller of the upper drawer, and as the vertical puller near the upper and lower ends of the drawer in the center of the front plate of the drawer, pull each drawer of the upper and lower storages. When the hands are arranged in a straight line, it is possible to create an aesthetic appearance with a uniform appearance, and it is possible to operate the drawer with one hand. In the case where the puller of the drawer-type storage is set in the above-described vertical form, it is necessary to provide a mechanism that releases the engagement of the left and right latch mechanisms in conjunction with the operation of the puller.
[0004]
[Problems to be solved by the invention]
In view of the above situation, what the present invention intends to solve is a puller for a drawer of a drawer-type storage, which is a double door provided with a vertical puller that covers almost the entire area of the fitting portion between the storage and the double door. The object of the present invention is to provide a drawer mechanism for a drawer-type storage box in which a stack of door-mounted storage boxes creates a new unified beauty in which the respective pullers of the two storage boxes are vertically aligned in the center. Another problem to be solved by the present invention is to provide a vertical puller near the upper and lower ends of the front plate of the drawer in the center of each drawer of the horizontally long drawer-type storage, and to set the height of the person and the height of the drawer. The latch mechanism provided on the left and right sides of the drawer can be accurately linked regardless of the vertical position of the puller, and the puller can be easily pulled out with one hand using either the left or right hand. It is to provide a hand mechanism.
[0005]
[Means for Solving the Problems]
In order to solve the above-described problems, the puller mechanism of the drawer-type storage according to the present invention has a middle part supported near the upper, lower and lower ends inside the front plate of each drawer of the drawer-type storage so as to be rotatable back and forth. A pair of horizontal puller levers, a vertical puller located at the front center of the front plate and connecting the tips of the upper and lower puller levers with a gap between the front plate and the front puller lever; A driven shaft which is horizontally supported inside the plate and rotates in conjunction with the swing of the rear end side of the pull lever and extends around the left and right ends of the drawer, and is capable of swinging left and right in association with the rotation of the driven shaft. Swinging latch pieces supported in the vicinity of the left and right side plate portions, and biasing means for biasing the swinging latch pieces toward a locking member provided on the inner surface of the storage side wall and engaging with the swinging latch pieces. And a configuration having:
[0006]
In addition, the above-described puller is formed such that a horizontal section is a substantially isosceles triangle having a front end as a base, and the upper and lower ends of the puller are formed at a tip of a puller lever. It is convenient to fix each of them. Alternatively, a vertical concave portion whose side surface is inclined rearward is formed near the upper and lower ends of the front plate on the front surface of the portion where the puller of the drawer front plate is located, and a part of the rear end side of the puller is the concave portion. It is more convenient to attach the puller in the form of submerging it.
[0007]
In the puller mechanism having the above-described configuration, the pullers of each drawer of a storage having a plurality of horizontally long drawers are arranged in a straight line at the center in a vertical direction, thereby creating an aesthetically pleasing appearance and increasing the height and drawer of a person. In accordance with the height of the puller, the left and right latch mechanisms are released in conjunction with each other and the drawer can be pulled out even if the user pulls by grasping an appropriate position in the vertical direction of the puller, and the left and right hands can be operated with one hand It becomes an important pull mechanism.
[0008]
In the pulling mechanism of the drawer-type storage, the pulling lever connects the rear ends of each other with a vertical connecting bar, and the driven shaft has a crank portion in the middle of a horizontal shaft portion at both ends. And each of the shaft ends has a hook-like portion substantially orthogonal to the shaft portion, and the crank portion comes into contact with the connecting bar of the pull lever to swing the connecting bar back and forth during pull operation. While the driven shaft is supported so as to rotate with it, the swing latch piece is provided with an operation lever projecting laterally from the swing support member, and the hook-shaped portion of the driven shaft comes into contact with the operation lever. It is advantageous if the swing latch piece swings left and right according to the rotation of the driven shaft. Thus, regardless of the vertical position of the puller, the left and right latch mechanisms operate accurately synchronously with each other, and the biasing force acts equally on the left and right swing latch pieces to stabilize the operation. Can be.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and includes all embodiments satisfying the requirements described in the claims. It is a thing. FIG. 1 is an overall perspective view of a drawer type storage provided with a pull mechanism according to the present invention. 2 to 5 are partial views showing the upper end side of an embodiment of the pull mechanism of the pull-out type storage according to the present invention, and FIG. 2 is along the line BB in FIG. 3 when viewed from the side. 3 is a cross-sectional view taken along line AA of FIG. 2 when viewed from above, and FIG. 4 is a view of the driven shaft portion inside the front plate viewed from the front and viewed from the left of FIG. , FIG. 5 is a perspective view in which each component is developed. FIG. 6 shows, for reference, the appearance when the storage shown in FIG. 1 and the storage provided with a double door having a puller of the same form as the puller provided in the drawer are vertically stacked. .
[0010]
In the drawing, a drawer-type storage 1 is provided with three rails (not shown) horizontally in the front-rear direction on both sides inside a horizontally long rectangular parallelepiped housing 1a, and can be stored and supported along each rail. Drawers 3, 3, and 3 (the number is not limited), and each drawer 3 is provided with a stopper mechanism (not shown) at the front end of the front-back movement stroke. In the center of the front plate 3a of each drawer 3, a puller 6 of the puller mechanism 5 according to the present invention is provided, and the puller 6 of the puller mechanism is connected to the front plate 3a of the Hikita suji 3. It is composed of a vertical member extending substantially over the upper and lower ends.
[0011]
The puller mechanism 5 has a horizontal portion which is supported so as to be able to rotate forward and backward in a limited manner at an intermediate portion near the upper and lower ends of a central portion of an internal space surrounded by a front plate 3b and a back plate 3c of a front plate 3a of the drawer 3. And a vertical puller located at the front center of the front plate 3a and connecting the tips of the upper and lower puller levers 8, 8 with a gap therebetween. 6, a driven shaft 15 supported horizontally in the internal space of the front plate 3a, rotating in conjunction with the swing of the rear end side of the pull levers 8, 8 and extending near the left and right ends of the drawer; Swing latch pieces 25, 25 supported on the outside of the drawer left and right side plates 3d, 3d on the back side of the back side 3a and capable of swinging left and right in conjunction with the rotation of the driven shaft 15, and provided on the side wall inner plate 1b of the housing 1a; Latches engaging with latch engaging portions 26, 26 formed at the tips of the latch pieces 25, 25, respectively. And Ji claws 2,2, comprising a swinging latch piece 25, 25 the tip toward the side of the latch claw 2,2 from the configuration having a biasing spring 20, 20 to rotationally biased.
[0012]
The pull levers 8 and 8 connect the rear ends of each other with a vertical connecting bar 9. Each puller lever 8 restricts the portion of the through hole 8a formed in the middle portion to the front and rear by a pin 11 (see FIGS. 3 and 5) with respect to the puller support member 10 provided inside the front plate 3a. To be rotatably supported. The driven shaft 15 has a crank portion 17 having both ends protruding obliquely downward (in the illustrated example, formed by bending the middle portion of the shaft portion) in the middle of a horizontal shaft portion. It has hook-shaped parts 18, 18 which are substantially perpendicular to the shaft. Then, the crank 17 is brought into contact with the rear end face of the connecting bar 9 of the puller levers 8, 8 so that the driven shaft 15 rotates with the forward / backward swing of the connecting bar 9 when the puller 6 is operated. , Are supported by a plurality of shaft support members 16 fixed in the internal space of the front plate 3a.
[0013]
The swinging latch pieces 25, 25 are attached to a spring support frame 21, which is mounted and locked in a locking hole 23 formed through the back plate 3 c of the front plate 3 a, by a vertical support rotatably mounted on the spring support frame. The shafts 27 and 27 restrict the relative rotation with respect to the support shaft 27 and fix and support the distal end portion so that it can swing right and left. The support shaft 27 of each swing latch piece 25 is bent downward in a U-shape in a shape that does not interfere with the spring support frame 21 at a portion protruding upward from the spring support frame 21, and furthermore, ends thereof are mutually inward. It has an operation lever 28 which is formed by being bent substantially horizontally to the right. The hooks 18, 18 of the driven shaft 15 are respectively brought into contact with the operation levers 28, 28, so that when the driven shaft 15 rotates, the swing latch pieces 25, 25 swing right and left. Constitute. The biasing spring 20 is mounted on the support shaft 27 inside the spring support frame 21, one end of which is locked to the support shaft 27 and the other end is locked to the spring support frame 21. It is urged to rotate toward the latch claw 2, that is, outward.
[0014]
As shown in FIG. 5, the structure of the spring support frame 21 has a rectangular section having a rectangular horizontal cross section and an interior opening rearward, and has a flange protruding outward in the vicinity of the rear end opening of the outer periphery of the space. A locking portion 22 having locking claws 22a, 22a provided vertically is formed at the rear of the flange portion, and a shaft hole for mounting a support shaft 27 is formed through the front upper and lower surfaces of the flange. . The locking portion 22 of the spring support frame 21 is pushed into the locking hole 23 formed through the back plate 3c of the front plate 3a outside the side plate 3d of the drawer 3 from the inside toward the rear, and is mounted. Lock and fix with. Then, the base ends of the biasing spring 20 and the swinging latch piece 25 are inserted through the rear opening of the spring support frame 21, and the support shaft 27 is mounted through the shaft hole of the spring support frame 21 to remove the swinging latch piece 25. In addition to being integrally fixed to the support shaft 27, a biasing force is applied to the biasing spring 20 to lock one end of the support shaft 27 and the other end of the spring support frame 21. Thus, when the operation lever 28 of the support shaft 27 is rotated back and forth by the hook-shaped portion 18 at the end of the driven shaft 15, the swing latch piece 25 is supported so that the tip swings right and left, and the biasing spring is At 20, the tip is urged to rotate toward the latch claw 2 side.
[0015]
On the other hand, the puller 6 is composed of a vertical rod-shaped intermediate member 6a and end members 7 and 7. After attaching the tips of the puller levers 8 and 8 to both ends of the intermediate member 6a, the puller 6 is moved up and down. The end members 7, 7 are attached to the ends, respectively. The intermediate member 6a of the pull 6 is preferably formed so that the horizontal cross section is a substantially isosceles triangle having the front end 6b as the base and the rear side surfaces 6c, 6c as the two left and right sides. The front surface of the portion of the front plate 3a of the drawer 3 where the handle 6 is located has inclined side surfaces 4a, 4a whose side surfaces are inclined rearward, and a bottom portion 4b parallel to the front plate 3b of the front plate 3a. It is preferable that the vertical recess 4 is formed in the vicinity of the upper and lower ends of the front plate 3a, and the puller 6 is attached so that a part of the rear end side of the puller sinks into the recess 4.
[0016]
Next, the operation of the pull mechanism 5 having the above configuration will be described. When the drawer 3 is pushed into the housing 1 a of the storage 1, the latch claw engaging portion 26 of the swing latch piece 25 of the puller mechanism 5 engages with the latch claw 2 by the action of the biasing spring 20. In addition to restricting the drawer 3 from jumping out, the contact surface 7a of the end members 7, 7 is pulled by the puller 6 in a state in which a part of the rear side surface 6c is immersed in the central recess 4 of the front plate 3a. The front plate 3a is in contact with the upper and lower ends of the front plate 3b. In this state, when an appropriate portion of the intermediate member 6a of the puller 6 is pulled forward by one of the right and left hands, the puller levers 8, 8 are limitedly pivoted forward, and the rear ends of the puller levers 8, 8 are turned. The rear end face of the connecting bar 9 fixed to the shaft rotates backward, and the crank portion 17 of the driven shaft 15 abutting on the connecting bar 9 rotates in the direction of the arrow in FIG. As a result, the hooks 18 at both ends of the driven shaft 15 rotate the operation lever 28 of the support shaft 27 of the swing latch piece 25 in the direction of the arrow in FIG. The latch claw engagement portion 26 and the latch claw 2 are disengaged, and the drawer 3 is pulled out forward.
[0017]
Since the left and right swing latch pieces 25, 25 are interlockingly rotated at the same angle by the hook-like portions 18, 18 at both ends of one driven shaft 15, the puller 6 can be pulled up or down in any position. The engagement lock between the swing latch pieces 25, 25 and the latch claws 2, 2 is released from synchronization. Also, the rear end surfaces 6c, 6c of the pull 6 are located at an appropriate gap between the inclined side surfaces 4a, 4a of the concave portion 4 of the front plate 3a and the bottom portion 4b, respectively. However, it is possible to hang the hand without any trouble using either the left or right hand.
[0018]
When pushing in the drawer 3, the front plate 3 a is pushed in, and in the middle of the pushing process, the sharp inclined outer surfaces of the rocking latch pieces 25, 25 come into contact with the forward inclined surfaces of the latch claws 2, 2. When the drawer 3 is pushed back inward and the drawer 3 is pushed into the pushing stroke end, each latch claw engaging portion 26 coincides with the latch claw 2 and the swinging latch piece rotates outward by the action of the biasing springs 20, 20. Then, the front end of the hole of the latch claw engaging portion 26 is engaged with the rear end of the latch claw 2, respectively, and the drawer 3 is locked and held so as not to protrude.
[0019]
Next, although illustration is omitted, an embodiment different from the above-described embodiment will be described below. First, as for the pull 6, the intermediate member 6 a may have an appropriate shape without a horizontal cross-sectional shape of an isosceles triangle. Further, the drawer 3 may have a flat front surface without providing a vertical recess in which the front surface retreats at the position of the puller. In this case, an appropriate gap is formed between the front plate 3b of the front plate 3a where the puller intermediate member 6a is located and the intermediate member 6a of the puller 6. However, when the recess 4 is provided in the front plate 3a and a part of the rear end side of the puller intermediate member 6a is recessed in the recess 4 as described above, the protrusion of the puller to the front of the front plate 3a is reduced. It is convenient because aesthetic appearance is created with little intrusion and design.
[0020]
Unlike the above-described structure, the latch mechanism has a structure in which a contact portion between the crank portion 17 of the driven shaft and the connecting bar 9 at the rear end of the puller lever 8 is engaged by loose fitting that can move in the vertical direction. Alternatively, the contact portion between the hook-like portion 18 of the driven shaft and the operating lever 28 of the swing latch piece 25 may be loosely fitted to each other. When all the contact portions are configured to be loosely engaged as described above, the biasing spring 20 is provided on one of the swinging latch pieces 25 or one provided on the driven shaft, The number of components can be reduced. The driven shaft and its crank portion 17 are different from the illustrated embodiment in that a crank lever is fixedly attached to the center of a horizontal shaft portion in a direction orthogonal to the shaft portion, and the tip end of the crank lever is pulled by a pull lever. A structure may be employed in which the connecting bars 9 are connected to each other by loose fitting which can be moved in the vertical direction or abut on the rear end surface of the connecting bar 9 connecting the connecting bars 8.
[0021]
Next, in FIG. 6, the drawer-type storage 1 shown in FIG. 1 and a puller 32 having the same shape as the puller 6 provided on the front plate 3a of the drawer 3 are set at the center of the double doors 31, 31. The appearance of the storage case 30 with a double door, which is attached to the fitting portion so as to cover the mating portion over substantially the upper and lower ends of the door, is shown in an up-and-down state. When a puller similar to the puller mechanism of the pullout type storage according to the present invention is attached in a form shown in FIG. 6 so as to cover the mating portion of the door of the storage with double doors, the upper and lower storages The pullers are arranged vertically and linearly in the center of the storage box, and the design of the upper and lower pullers is harmonized, and it is convenient to create a new aesthetic appearance.
[0022]
【The invention's effect】
The pulling mechanism of the drawer-type storage according to the first aspect of the present invention is a pair of horizontal pulleys whose middle portions are supported near the upper and lower ends of a central portion inside the front plate of the drawer so as to be pivotable back and forth. A puller lever, a vertical puller located at the front center of the front plate and connecting the tips of the upper and lower puller levers with a gap between the front plate and a puller supported horizontally inside the front plate. A driven shaft that rotates in conjunction with the swing of the rear end of the hand lever and extends near the left and right ends of the drawer, and a swing supported in the vicinity of the left and right side plate portions of the drawer so as to swing left and right in conjunction with the rotation of the driven shaft. Since it has a structure having a latch piece and an urging means provided on the inner surface of the side wall of the storage box and for urging the swing latch piece toward the locking member engaging with the swing latch piece, a plurality of horizontally elongated The drawers of each drawer of the storage with a drawer The drawers are lined up to create an aesthetically pleasing appearance, and depending on the height of the drawer and the height of the drawer, even if the puller grasps an appropriate position in the vertical direction and pulls, the left and right latch mechanisms are interlocked and released, and the drawer is pulled out. There is an operational effect that the puller can be pulled out and the puller can be operated with one hand by putting a hand on the puller from any direction. Then, when stacking a double door type storage with a vertical pull handle that covers almost the entire area of the joining part of the double doors in the drawer type storage, each of the double door type storage and the drawer type storage is The puller is arranged in a vertical straight line at the center, which has the effect of creating a well-balanced unified beauty.
[0023]
In the puller mechanism of the drawer-type storage according to the second aspect of the present invention, the middle portion excluding the upper and lower ends of the puller is formed so that the horizontal cross section is a substantially isosceles triangle having the front end as the base. It is easy to insert the hand into the gap between the front plate and the puller, and if the horizontal cross section is a flat isosceles triangle, it is lightweight and has a stable structure in terms of strength, and there is little protrusion to the front, creating aesthetic appearance There are effects such as being performed.
[0024]
The drawer mechanism of the drawer-type storage according to the third aspect of the invention has a vertical recess with a side surface inclined rearward in the vicinity of the upper and lower ends of the front plate on the front surface of the portion where the puller of the drawer front plate is located. Since the puller is attached in such a manner that a part of the rear end side of the puller is immersed in the recess, the amount of protrusion of the puller from the front plate surface of the drawer is reduced, so that it is not obstructive and has an aesthetic appearance. Has the effect of creating
[0025]
According to a fourth aspect of the present invention, there is provided a pull mechanism for a drawer-type storage, wherein the rear ends of the pull levers are connected to each other by a vertical connecting bar, and the driven shaft is connected to the middle of a horizontal shaft portion at both ends. And a hook which is substantially perpendicular to the shaft at both shaft ends. The crank portion abuts the connection bar of the pull lever to swing the connection bar back and forth during pull operation. While supporting the driven shaft to rotate with the movement, the swing latch piece is provided with an operation lever projecting sideways from the swing support member, and the hook-shaped portion of the driven shaft comes into contact with the operation lever. Since the swing latch piece swings right and left in accordance with the rotation of the driven shaft, even if the puller pulls any position in the vertical direction, that is, even if the turning angles of the upper and lower puller levers do not match. , The left and right latch mechanisms operate accurately synchronously with each other, and the left and right swing latch There are advantageous effects, such as stabilizing the disengagement operation of the latch of the swing latch piece urging force acts evenly.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a drawer type storage provided with a pull mechanism according to the present invention.
FIG. 2 is a cross-sectional view taken along a line BB in FIG. 3, showing an upper end side of the embodiment of the puller mechanism of the drawer shown in FIG.
3 is a cross-sectional view taken along the line AA of FIG. 2, showing the upper end side of the embodiment of the puller mechanism of the drawer of FIG. 1 as viewed from above.
4 is a diagram showing the driven shaft portion inside the front plate in the embodiment of the puller mechanism of the drawer shown in FIG. 1 when viewed from the front side and viewed from the left in FIG. 2;
FIG. 5 is an exploded perspective view showing constituent members of the pull mechanism of the embodiment.
FIG. 6 is a reference view showing the appearance when the storage shown in FIG. 1 and the storage with double doors provided with a puller of the same form as the puller provided on the door are vertically stacked.
[Explanation of symbols]
1 drawer type storage (storage)
1a Housing 1b Side wall inner plate 1c Latch claw attaching part 2 Latch claw 3 Drawer 3a Front plate 3b Front plate 3c Back plate 3d Side plate 4 Depression 4a Inclined side 4b Bottom 5 Puller mechanism 6 Puller 6a Intermediate member 6b Front end 6c Rear side 7 End member 7a Contact end surface 8 Puller lever 8a Through hole 8b Screw 9 Connection bar 10 Puller support member 11 Pin 15 Follower shaft 16 Shaft support member 17 Crank portion 18 Hook-shaped portion 20 Energizing spring 21 Spring support frame 22 Locking portion 22a Locking claw 23 Locking hole 25 Swing latch piece 26 Latch claw engaging portion 27 Support shaft 28 Operating lever 30 Storage 31 with double-opening door Door 32 Puller

Claims (4)

A pair of horizontal puller levers, each of which has an intermediate portion supported in the vicinity of the upper and lower ends of a central portion inside the front plate of each drawer of the drawer-type storage cabinet so as to be able to rotate back and forth, A vertical puller that connects the tips of the upper and lower puller levers with a gap between the front plate and a vertical puller that is horizontally supported inside the front plate and interlocks with the swing of the puller lever rear end side A driven shaft that rotates around the left and right ends of the drawer, a swing latch piece supported near the left and right side plate portions of the drawer so as to be able to swing left and right in conjunction with the rotation of the driven shaft, and an inner surface of the storage side wall And a biasing means for biasing the swinging latch piece toward the side of the locking member which engages with the swinging latch piece. The middle part except the upper and lower ends of the puller is formed so that the horizontal cross section is a substantially isosceles triangle with the front end as the base, and the upper and lower ends of the puller are fixed to the tip of the puller lever, respectively. The pull mechanism of the drawer-type storage according to claim 1. On the front surface of the portion where the puller of the drawer front plate is located, a vertical concave portion whose side surface is inclined backward is formed near the upper and lower ends of the front plate, and a part of the rear end side of the puller sinks into the concave portion. The pull mechanism according to claim 1 or 2, wherein the pull mechanism is attached in a form. The puller lever connects the rear ends of each other with a vertical connection bar, and the driven shaft has a crank portion in the middle of a horizontal shaft portion at both ends, and the shaft portions at both shaft ends respectively. The crank portion comes into contact with the connecting bar of the pull lever, and the driven shaft rotates with the forward and backward swing of the connecting bar during the pull operation. On the other hand, the swing latch piece is provided with an operation lever projecting laterally from the swing support member, and the hook-like portion of the driven shaft comes into contact with the operation lever to swing according to the rotation of the driven shaft. 4. The pull mechanism according to claim 1, wherein the latch piece swings left and right.

Images