JP6397540B2 - Cutter knife blade folding tool - Google Patents

Description

  The present invention relates to a blade folding tool for folding a blade of a cutter knife.

  As a conventional blade cutter of a cutter knife, for example, there is one described in Patent Document 1. The blade folding tool described in this document is attached to the rear end of a holder that accommodates the blade of the cutter knife, and has a slit into which the blade can be inserted. After removing the blade folding tool from the holder, the tip of the blade can be broken by inserting the tip of the blade into the slit of the blade folding tool and applying force to the blade folding tool in this state.

JP 2003-245482 A

  By using the above-described blade folding tool, the blade body can be folded without touching the blade body. However, when the blade is folded, the tip of the blade is merely inserted into the slit and is not fixed to the blade folding tool. Therefore, the blade folding tool has a risk that the tip of the cut blade body is scattered. The existence of such a risk causes fear of a user who tries to break the blade.

  This invention is made | formed in view of the said subject, and it aims at providing the blade folding tool of the cutter knife which can reduce the risk that the front-end | tip part of the cut-off blade body will scatter.

  A cutter knife folding tool according to the present invention is a cutter knife folding tool for folding a cutter knife blade body, and is a long plate-like upper plate having an upper surface abutting portion that abuts against the upper surface of the blade body. A long plate-like lower plate member having a lower surface contact portion that contacts the lower surface of the blade body and connected to the upper plate member, the upper surface contact portion and the lower surface contact portion Are separated from each other, and the upper plate member is displaced by receiving a downward force until the upper surface contact portion comes into contact with the lower surface contact portion.

  In this blade folding tool, an upper plate member and a lower plate member are provided. By receiving a downward force, the upper plate member can be displaced until its upper surface contact portion comes into contact with the lower surface contact portion of the lower plate member. For this reason, the blade body can be clamped by bringing the upper surface contact portion and the lower surface contact portion into contact with the upper surface and the lower surface of the blade body, respectively, while applying a downward force to the upper plate member. Thereby, when the blade body is folded, the distal end portion of the blade body is fixed to the blade folding tool, so that the broken distal end portion is hardly scattered.

  ADVANTAGE OF THE INVENTION According to this invention, the blade folding tool of the cutter knife which can reduce the risk that the front-end | tip part of the cut-off blade body will scatter is implement | achieved.

It is a side view which shows 1st Embodiment of the blade folding tool of the cutter knife by this invention. It is a top view which shows the blade folding tool of FIG. 2 is a plan view showing an upper plate member 10. FIG. 4 is a bottom view showing the lower plate member 20. FIG. FIG. 2 is a side view showing a state where the upper surface contact portion 12 of the upper plate member 10 and the lower surface contact portion 22 of the lower plate member 20 are in contact with each other in the blade folding tool of FIG. 1. It is a side view for demonstrating an example of the usage method of the blade folding tool of FIG. It is a side view for demonstrating an example of the usage method of the blade folding tool of FIG. It is a side view for demonstrating an example of the usage method of the blade folding tool of FIG. It is a side view for demonstrating the effect of the blade folding tool of FIG. It is a side view which shows 2nd Embodiment of the blade folding tool of the cutter knife by this invention. It is a top view which shows the blade folding tool of FIG. 4 is a front view showing a cover member 50. FIG. 6 is a plan view for explaining a modification of the upper plate member 10 and the lower plate member 20. FIG. It is a top view for demonstrating the effect of the modification of FIG. FIG. 10 is a plan view for explaining a modification of the cover member 50. It is a side view for demonstrating the other modification of the cover member. It is a side view which shows the blade folding tool which concerns on a modification. It is a side view which shows the blade folding tool which concerns on a modification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same reference numerals are assigned to the same elements, and duplicate descriptions are omitted.
(First embodiment)

  FIG. 1 is a side view showing a first embodiment of a cutter knife folding tool according to the present invention. FIG. 2 is a plan view showing the blade folding tool of FIG. The blade folding tool 1 of the cutter knife is a blade folding tool for folding the blade of the cutter knife, and includes an upper plate member 10, a lower plate member 20, an operation lever 30, and a support shaft 40.

  The upper plate member 10 and the lower plate member 20 have a long plate shape and overlap each other in plan view (see FIG. 2). The longitudinal direction of the upper plate member 10 and the longitudinal direction of the lower plate member 20 are equal to each other. The length of the upper plate member 10 and the lower plate member 20 is, for example, about 8 to 12 cm. Moreover, the width | variety of the upper board member 10 and the lower board member 20 is about 1-3 cm, for example.

  The upper plate member 10 has an upper surface contact portion 12. The upper surface contact portion 12 is a portion that contacts the upper surface of the blade of the cutter knife. The upper surface contact portion 12 has a planar shape. In the present embodiment, the shape of the upper surface contact portion 12 is a rectangle. The upper surface contact portion 12 constitutes the tip 10 a of the upper plate member 10.

  The lower plate member 20 has a lower surface contact portion 22. The lower surface contact portion 22 is a portion that contacts the lower surface of the blade of the cutter knife. The lower surface contact portion 22 has a planar shape. In this embodiment, the shape of the lower surface contact portion 22 is a rectangle. The lower surface contact portion 22 constitutes the tip 20 a of the lower plate member 20. The front end 20a of the lower plate member 20 coincides with the front end 10a of the upper plate member 10 in plan view. The tip 10a and the tip 20a are linear in a plan view.

  The vicinity of the tip 10 a of the upper plate member 10 is bent toward the lower plate member 20. Further, the vicinity of the tip 20 a of the lower plate member 20 is bent toward the upper plate member 10. Thereby, the upper surface contact portion 12 of the upper plate member 10 and the lower surface contact portion 22 of the lower plate member 20 face each other. When not in use, that is, when the upper plate member 10 is not receiving a downward force described later, the upper surface contact portion 12 and the lower surface contact portion 22 are separated from each other.

  The lower plate member 20 is connected to the upper plate member 10. In the present embodiment, the upper plate member 10 and the lower plate member 20 are connected to each other at the rear end 10 b of the upper plate member 10 and the rear end 20 b of the lower plate member 20. Specifically, the rear end 10b of the upper plate member 10 and its vicinity region and the rear end 20b of the lower plate member 20 and its vicinity region are joined to each other. The rear end 20b of the lower plate member 20 coincides with the rear end 10b of the upper plate member 10 in plan view. As a material of the upper plate member 10 and the lower plate member 20, for example, a metal can be used.

  The operation lever 30 applies a downward force to the upper plate member 10 based on the principle of lever. The operation lever 30 has a long plate shape and is provided on the upper plate member 10. The operation lever 30 has a corner portion 32. The corner 32 is provided near the tip 30 a of the operation lever 30. The corner portion 32 is a portion serving as an action point in the principle of the insulator. The operation lever 30 is movable so that the rear end 30b of the operation lever 30 draws an arc around the corner portion 32 in a side view (see FIG. 1).

  In the operation lever 30, the vicinity of the tip 30a serves as a fulcrum of the lever principle, and the vicinity of the rear end 30b serves as a power point of the lever principle. In a plan view, the corner portion 32 (action point) is located between the fulcrum and the force point. However, the distance from the corner 32 to the rear end 30b is longer than the distance from the corner 32 to the tip 30a. The former distance is preferably 5 times or more of the latter distance, and more preferably 10 times or more. As a material of the operation lever 30, for example, a metal can be used.

  The support shaft 40 passes through the upper plate member 10 and the lower plate member 20. The support shaft 40 is connected to the vicinity of the tip 30a of the operation lever 30 (the portion serving as the fulcrum). Specifically, as shown in FIGS. 3 and 4, a hole 14 and a hole 24 are formed in the upper plate member 10 and the lower plate member 20, respectively. The support shaft 40 is provided so as to pass through these holes 14 and 24. A part of the support shaft 40 (a part including the upper end 40 a) protrudes upward from the upper plate member 10. This portion of the support shaft 40 enters the inside of a notch 34 (see FIG. 2) formed at the tip 30a of the operation lever 30. Inside the notch 34, the support shaft 40 and the operation lever 30 are connected to each other via a pin 42. The pin 42 extends in the left-right direction of the upper plate member 10 and the lower plate member 20 (direction perpendicular to the paper surface of FIG. 1).

  The diameter of the lower end 40 b of the support shaft 40 is larger than the diameter of the hole 24 of the lower plate member 20. The lower end 40b protrudes to the lower surface of the lower plate member 20 (the surface opposite to the upper surface that is the surface facing the upper plate member 10). As a result, the support shaft 40 is prevented from falling out of the hole 24. However, the support shaft 40 is provided so as to be rotatable around its central axis. In a plan view, the distance d1 (see FIG. 2) from the tips 10a, 20a of the upper plate member 10 and the lower plate member 20 to the support shaft 40 is preferably 10 mm or more and 25 mm or less. As the material of the support shaft 40, for example, a metal can be used.

  As shown in FIG. 5, by applying a force to the vicinity (power point) of the rear end 30 b of the operation lever 30 and pushing down the operation lever 30, it is directed downward with respect to the upper plate member 10 through the corner portion 32 (action point). Force F can be applied. By receiving the downward force F, the upper plate member 10 is displaced until the upper surface contact portion 12 contacts the lower surface contact portion 22. In this state where the upper surface contact portion 12 and the lower surface contact portion 22 are in contact with each other, the upper surface contact portion 12 and the lower surface contact portion 22 are completely overlapped. That is, the entire upper surface contact portion 12 and the entire lower surface contact portion 22 overlap each other.

  An example of how to use the blade folding tool 1 will be described with reference to FIGS. First, as shown in FIG. 6, a cutter knife blade 92 held in one hand is placed in a gap between the upper surface contact portion 12 of the upper plate member 10 and the lower surface contact portion 22 of the lower plate member 20. Insert it. Next, as shown in FIG. 7, the upper plate member is pushed down with the other hand until the upper surface contact portion 12 and the lower surface contact portion 22 contact the upper surface and the lower surface of the blade body 92, respectively. Apply a downward force to 10. After that, by continuing to apply a downward force to the upper plate member 10, the blade body 92 is clamped by the upper surface contact portion 12 and the lower surface contact portion 22. In this state, by applying a force in the direction in which the blade body 92 is bent, the tip end portion 92a of the blade body 92 can be folded as shown in FIG.

  The effect of the blade folding tool 1 will be described. In the blade folding tool 1, an upper plate member 10 and a lower plate member 20 are provided. By receiving the downward force, the upper plate member 10 can be displaced until the upper surface contact portion 12 contacts the lower surface contact portion 22 of the lower plate member 20. Therefore, the blade body can be clamped by bringing the upper surface contact portion 12 and the lower surface contact portion 22 into contact with the upper surface and the lower surface of the blade body, respectively, while applying a downward force to the upper plate member 10. Thereby, when the blade body is folded, the distal end portion of the blade body is fixed to the blade folding tool 1, so that the broken distal end portion is hardly scattered. Therefore, the blade folding tool 1 which can reduce the risk that the tip part of the cut blade body is scattered is realized.

  The upper surface contact portion 12 has a planar shape. Thus, by flattening the portion that contacts the upper surface of the blade body, the upper surface contact portion 12 can be easily adhered to the blade body. Thereby, a blade body can be clamped stably.

  The lower surface contact portion 22 has a planar shape. By flattening the portion that contacts the lower surface of the blade body in this way, the lower surface contact portion 22 can be easily adhered to the blade body. Thereby, a blade body can be clamped stably.

  The upper plate member 10 and the lower plate member 20 are connected to each other at the rear ends 10b and 20b. Thus, by connecting the upper plate member 10 and the lower plate member 20 at positions far away from the tips 10a and 20a, the movable range of the tips 10a and 20a can be increased.

  The vicinity of the tip 10 a of the upper plate member 10 is bent toward the lower plate member 20, and the vicinity of the tip 20 a of the lower plate member 20 is bent toward the upper plate member 10. Thereby, the structure where the upper surface contact part 12 which comprises the front-end | tip 10a of the upper board member 10 and the lower surface contact part 22 which comprises the front-end | tip 20a of the lower board member 20 mutually opposes is easily realizable. Such a configuration is advantageous for stably holding the blade body.

  The front end 10a of the upper plate member 10 and the front end 20a of the lower plate member 20 are linear in a plan view. In this case, the blade body can be clamped so that the tips 10a and 20a are parallel to the folding line of the blade body. This makes it easier to fold the blade body along the fold line.

  The blade folding tool 1 is provided with an operation lever 30. For this reason, even if the force applied to the operation lever 30 is small, the downward force received by the upper plate member 10 can be increased by the lever principle. Thereby, the force required for the user to operate the operation lever 30 can be reduced.

  The operation lever 30 has a corner portion 32 which is an action point in the lever principle, and can move so that the rear end 30b of the operation lever 30 draws an arc around the corner portion 32 in a side view. In this case, a downward force can be applied to the upper plate member 10 by depressing the operation lever 30. For this reason, operation of the operation lever 30 becomes easy.

  In the operation lever 30, the vicinity of the tip 30a serves as a fulcrum in the lever principle. In this case, the distance from the power point to the fulcrum can be increased. This is advantageous for reducing the force required to operate the operation lever 30.

  The blade folding tool 1 is provided with a support shaft 40 that passes through the upper plate member 10 and the lower plate member 20. The vicinity of the tip 30 a of the operation lever 30 is connected to the support shaft 40. Thereby, it is possible to use the vicinity of the tip 30a of the operation lever 30 as a fulcrum with a simple configuration.

  The support shaft 40 is provided so as to be rotatable around its central axis. As a result, after rotating the support shaft 40 together with the operation lever 30 by 180 ° around the central axis, the operation lever 30 is rotated about the pin 42, as shown in FIG. The operation lever 30 can be overlapped. Thereby, when not in use, the blade folding tool 1 can be stored compactly.

When the distance d1 from each tip 10a, 20a of the upper plate member 10 and the lower plate member 20 to the support shaft 40 is larger, the blade body is inserted into the gap between the upper surface contact portion 12 and the lower surface contact portion 22. Sometimes the support shaft 40 is less likely to get in the way. On the other hand, if the distance d1 is too large, the corner portion 32 serving as the action point approaches the rear end 10b of the upper plate member 10, and thus the force necessary to close the gap increases. From this viewpoint, the distance d1 is preferably 10 mm or more and 25 mm or less.
(Second Embodiment)

  FIG. 10 is a side view showing a second embodiment of the blade folding tool of the cutter knife according to the present invention. FIG. 11 is a plan view showing the blade folding tool of FIG. The blade folding tool 2 of the cutter knife is a blade folding tool for folding the blade of the cutter knife. In addition to the upper plate member 10, the lower plate member 20, the operation lever 30, and the support shaft 40, the cover member 50 is provided. I have. The configurations of the upper plate member 10, the lower plate member 20, the operation lever 30, and the support shaft 40 are as described in the first embodiment.

  The cover member 50 covers the space between the upper plate member 10 and the lower plate member 20 from the left and right sides. The cover member 50 covers substantially the entire portion of the upper surface of the upper plate member 10 (the surface opposite to the lower surface that is the surface facing the lower plate member 20) where the operation lever 30 is not in contact. Further, the cover member 50 covers the entire lower surface of the lower plate member 20. The cover member 50 extends forward from the upper plate member 10 and the lower plate member 20. And the cover member 50 has covered the space ahead of the upper board member 10 and the lower board member 20 from four directions of up and down, right and left. The cover member 50 is preferably transparent.

  FIG. 12 is a front view showing the cover member 50. An opening 52 is provided in the front surface 50 a of the cover member 50. The opening 52 is provided at a position overlapping the gap between the upper surface contact portion 12 and the lower surface contact portion 22 in a front view. A blade of a cutter knife is inserted into the opening 52. In the present embodiment, in addition to the blade body, the front end portion of the holder in which the blade body is accommodated is also inserted into the opening 52. As a material of the cover member 50, for example, plastic can be used.

  The effect of the blade folding tool 2 will be described. A cover member 50 that covers the space between the upper plate member 10 and the lower plate member 20 from both the left and right sides is provided. In this case, the tip of the blade body that has been broken off can be confined in the space. Thereby, the risk that the tip portion is scattered can be further reduced.

  The cover member 50 extends forward from the upper plate member 10 and the lower plate member 20. As a result, the broken blade body is less likely to be scattered in front of the upper plate member 10 and the lower plate member 20. In particular, the cover member 50 covers the space in front of the upper plate member 10 and the lower plate member 20 from the upper, lower, left and right sides. In this case, the tip end portion of the blade body that has been broken off can be confined in the space.

  The cover member 50 is provided with an opening 52. By inserting the blade body into the gap between the upper surface contact portion 12 and the lower surface contact portion 22 through the opening 52, the operation of folding the blade body can be performed in the space covered with the cover member 50. . Thereby, the fear of the user who is going to fold a blade can be reduced effectively.

  In addition to the blade body, the tip of the holder in which the blade body is accommodated is also inserted into the opening 52. Thus, by inserting the opening 52 to the tip of the holder, the entire blade protruding from the holder is accommodated in the space covered by the cover member 50 when the blade is folded. Thereby, the fear of the user who is going to fold a blade can be reduced more effectively.

  When the cover member 50 is transparent, the blade body in the cover member 50 can be visually recognized even from the outside of the cover member 50. Therefore, the blade body can be easily aligned with the upper surface contact portion 12 and the lower surface contact portion 22. Can be done. Other effects of the blade folding tool 2 are the same as those of the blade folding tool 1.

  The present invention is not limited to the above embodiment, and various modifications can be made. In the said embodiment, the case where the front-end | tip 10a of the upper board member 10 and the front-end | tip 20a of the lower board member 20 were perpendicular | vertical to the longitudinal direction of the upper board member 10 and the lower board member 20 was illustrated. However, the tip 10a of the upper plate member 10 and the tip 20a of the lower plate member 20 may be inclined with respect to the longitudinal direction in plan view as shown in FIG. In this case, as shown in FIG. 14, even if the blade body 92 is inserted along the longitudinal direction of the upper plate member 10 and the lower plate member 20, the tips 10 a and 20 a are aligned parallel to the fold line of the blade body 92. It becomes possible. Similarly, the front surface 50a of the cover member 50 may be inclined with respect to the longitudinal direction in plan view as shown in FIG.

  In the said embodiment, the case where the cover member 50 covered to the rear end 10b of the upper board member 10 and the rear end 20b of the lower board member 20 was illustrated. However, as shown in FIG. 16, the cover member 50 may cover only the vicinity of the tip 10 a of the upper plate member 10 and the tip 20 a of the lower plate member 20. In this case, the cover member 50 can be attached to the upper plate member 10 and the lower plate member 20 by covering the upper plate member 10 and the lower plate member 20 from the front. Further, the cover member 50 can be detached from the upper plate member 10 and the lower plate member 20 by pulling forward.

  In the above embodiment, as shown in FIGS. 17 and 18, an auxiliary member 60 may be provided. The auxiliary member 60 has a long plate shape, and includes a fixed portion 62 fixed to the lower surface of the cover member 50 and a movable portion 64 that is displaced with respect to the cover member 50. The movable portion 64 has a curved line so as to involve the front surface 50a of the cover member 50 in a side view. By displacing the movable portion 64, the front surface 50a of the cover member 50 is covered with the auxiliary member 60 (the state shown in FIG. 17) and the front surface 50a of the cover member 50 is not covered with the auxiliary member 60 ( The state shown in FIG. 18 is switched. In the former state, the opening 52 is closed, and in the latter state, the opening 52 is opened. Thus, the auxiliary member 60 can function as a lid that can be opened and closed. As a material of the auxiliary member 60, for example, plastic can be used.

  In the embodiment, the case where the operation lever 30 is provided has been illustrated. However, providing the operation lever 30 is not essential. When the operation lever 30 is not provided, a downward force may be applied to the upper plate member 10 by, for example, pushing down the upper plate member 10 by hand. In that case, the support shaft 40 is also not provided.

DESCRIPTION OF SYMBOLS 1 Cutter knife blade folding tool 2 Cutter knife blade folding tool 10 Upper plate member 10a Front end 10b Rear end 12 Upper surface contact portion 14 Hole 20 Lower plate member 20a Front end 20b Rear end 22 Lower surface contact portion 24 Hole 30 Operation lever 30a Front end 30b Rear end 32 Corner portion 34 Notch portion 40 Spindle 40a Upper end 40b Lower end 42 Pin 50 Cover member 50a Front surface 52 Opening 60 Auxiliary member 62 Fixed portion 64 Movable portion 92 Blade 92a Front end portion

Claims (21)

A cutter knife folding tool for folding a cutter knife blade,
A long plate-like upper plate member having an upper surface abutting portion that abuts on the upper surface of the blade body;
A long plate-like lower plate member that has a lower surface contact portion that contacts the lower surface of the blade body and is connected to the upper plate member;
A cover member that covers the space between the upper plate member and the lower plate member from the left and right sides ;
The upper surface contact portion and the lower surface contact portion are separated from each other,
The upper plate member is displaced until it receives a downward force until the upper surface contact portion comes into contact with the lower surface contact portion. In the blade cutter of the cutter knife according to claim 1,
The upper surface abutting portion is a blade cutter of a cutter knife having a planar shape. In the blade knife of the cutter knife according to claim 1 or 2,
The lower surface abutting portion is a blade cutter of a cutter knife having a planar shape. In the cutter knife folding tool according to any one of claims 1 to 3,
The upper plate member and the lower plate member are blade cutters of a cutter knife that are connected to each other at the rear ends of the upper plate member and the lower plate member. In the cutter knife folding tool according to any one of claims 1 to 4,
The upper surface contact portion constitutes the tip of the upper plate member,
The lower surface contact portion is a blade folding tool of a cutter knife that constitutes the tip of the lower plate member. In the blade knife of the cutter knife according to claim 5,
The vicinity of the tip of the upper plate member is bent toward the lower plate member,
The blade folding tool of the cutter knife in which the vicinity of the tip of the lower plate member is bent toward the upper plate member. In the blade knife of the cutter knife according to claim 5 or 6,
The front end of the upper plate member and the front end of the lower plate member are blade folding tools of a cutter knife that are linear in a plan view. In the blade knife of the cutter knife according to claim 7,
The cutter knife folding tool in which the tip of the upper plate member and the tip of the lower plate member are inclined with respect to the longitudinal direction of the upper plate member and the lower plate member in plan view. In the cutter knife folding tool according to any one of claims 5 to 8,
A blade folding tool for a cutter knife comprising an operation lever that applies the downward force to the upper plate member according to a lever principle. In the blade cutter of the cutter knife according to claim 9,
The operation lever has a corner portion serving as an action point in the principle of the lever, and can be moved so that a rear end of the operation lever draws an arc around the corner portion in a side view. Blade folding tool. In the blade cutter of the cutter knife according to claim 10,
A blade folding tool for a cutter knife in which the vicinity of the tip of the operating lever is a fulcrum in the lever principle. In the blade cutter of the cutter knife according to claim 11,
A support shaft penetrating the upper plate member and the lower plate member;
The vicinity of the tip of the operation lever is a blade folding tool of a cutter knife connected to the support shaft. In the blade cutter of the cutter knife according to claim 12,
The said support shaft is a blade folding tool of the cutter knife provided rotatably around the central axis of the said support shaft. In the blade cutter of the cutter knife according to claim 12 or 13,
The blade folding tool of a cutter knife whose distance from the said front-end | tip of the said upper board member and the said lower board member to the said support shaft is 10 mm or more and 25 mm or less by planar view. In the blade knife of the cutter knife in any one of Claims 1 thru | or 14 ,
The cover member is a blade folding tool of a cutter knife that extends forward from the upper plate member and the lower plate member. In the blade cutter of the cutter knife according to claim 15 ,
The cover member is a blade folding tool for a cutter knife that covers the space in front of the upper plate member and the lower plate member from the upper, lower, left and right sides. In the blade cutter of the cutter knife according to claim 16 ,
A blade folding tool for a cutter knife, wherein an opening into which the blade body is inserted is provided on the front surface of the cover member. The blade folding tool of the cutter knife according to claim 17 ,
The blade folding tool of a cutter knife into which the front-end | tip part of the holder in which the said blade body was accommodated is inserted in the said opening in addition to the said blade body. In the blade cutter of the cutter knife according to claim 17 or 18 ,
An auxiliary member having a fixed portion fixed to the lower surface of the cover member and a movable portion displaced relative to the cover member;
A blade cutter for a cutter knife capable of switching between a state where the front surface of the cover member is covered with the auxiliary member and a state where the front surface is not covered with the auxiliary member by displacing the movable portion. In the blade knife of the cutter knife in any one of Claims 1 thru | or 19 ,
The cover member is a blade cutter of a cutter knife that is transparent. In the blade knife of the cutter knife according to any one of claims 1 to 20 ,
The front surface of the cover member is a blade cutter of a cutter knife that is oblique with respect to the longitudinal direction of the upper plate member and the lower plate member in plan view.

Images