JP3206694U - Connecting tool and workbench - Google Patents

Abstract

A connector that can suppress the end of a spring member of a locking mechanism that locks a pin so that the pin does not come off the engaging groove from moving in a direction away from a flat plate having the engaging groove, and can improve safety. I will provide a. The connector includes a first flat plate, a lock mechanism for locking the pin so that the pin does not come off the engagement groove, and a second flat plate. The lock mechanism 20 includes a shaft portion 21, a lock member 22 having a hook 23 and a release lever 24, and a spring member 25 that urges the lock member 22 in a direction to lock the pin. The spring member 25 includes a winding portion 26 wound around the shaft portion 21, a first end portion 27 that contacts the back surface 24 b of the release lever 24, and a second end portion 28 that contacts the second flat plate 30. . The second flat plate 30 is provided with a recess 31 (a restricting portion) that restricts the second end portion 28 from moving in a direction away from the first flat plate 11. [Selection] Figure 3

Description

  The present invention relates to a connector for keeping the opening angle of a leg of a work table constant, and a work table provided with the connector.

  2. Description of the Related Art Conventionally, there has been known a connector for keeping the opening angle of a leg portion of a work table such as a stepladder, a step ladder, and a ladder constant. For example, the connecting tool (upper latch 10 and lower latch 12) described in Patent Document 1 is pivotally connected at one end to the pin 7 of one leg 2 and is engaged at the other end. Joint grooves 10A and 12A are formed. Then, by rotating the connector, the lock pins 11 and 13 of the other leg 2 are inserted into the engaging grooves 10A and 12A, respectively, and the pair of legs 2 are locked. Thereby, the opening angle of the leg part of the stepladder can be kept constant, and the stability of the stepladder is improved.

JP 2006-241913 A

  In the connecting tool as described above, for example, as shown in FIGS. 10A and 10B, the connecting tool 110 is provided with a lock mechanism 120 that locks the pin engaged with the engaging groove 112. It is conceivable to adopt a configuration that prevents the engagement groove 112 from coming off. The lock mechanism 120 includes a shaft 121 attached to the first flat plate 111 in which the engagement groove 112 is formed, a hook 123 that is rotatably attached to the shaft 121, and unlocks the pin. A lock member 122 having a release lever 124 for rotating, and a spring member 125 for biasing the lock member 122 in a direction to lock the pin. The spring member 125 extends from the winding portion 126 wound around the shaft portion 121, the first end 127 that extends from the winding portion 126 and contacts the back surface 124 b of the release lever 124, and the winding portion 126. And a second end portion 128 that contacts the second flat plate 130 extending from the first flat plate 111 toward the locking mechanism 120 side. As described above, the first end portion 127 abuts on the back surface 124b of the release lever 124 and the second end portion 128 abuts on the second flat plate 130, so that the spring member 125 is moved between the release lever 124 and the second flat plate 130. A biasing force that functions as a spring and biases the pin in the locking direction is applied to the lock member 122. With such a configuration, the lock mechanism 120 can lock and release the pin.

  By the way, in the connecting tool 110 as described above, when the release lever 124 is operated and the pin is locked and released repeatedly, the winding portion 126 of the spring member 125 is loosened and the second flat plate 130 is abutted. It is conceivable that the second end portion 128 of the spring member 125 in contact with the spring member 125 moves in a direction away from the first flat plate 111. As a result, for example, as shown in FIG. 10C, the second end 128 of the spring member 125 jumps out of the second flat plate 130, and the user's hand or the like mistakenly ends the end of the spring member. There is a risk of touching the part.

  Therefore, the object of the present invention is to suppress the movement of the end of the spring member of the locking mechanism that locks the pin so that the pin does not come off the engaging groove in a direction away from the flat plate having the engaging groove. It is providing the coupling tool which can improve.

  A connector according to a first device is a connector for maintaining a constant opening angle of a leg of a work table, and includes a first flat plate having an engagement groove that engages with a pin provided on the work table. And a locking mechanism that is attached to the first flat plate and locks the pin so that the pin does not come off the engaging groove, and a second flat plate that extends from the first flat plate toward the locking mechanism. The lock mechanism includes a shaft member attached to the first flat plate, a lock member rotatably attached to the shaft member, and having a hook for locking the pin and a release lever for releasing the lock of the pin; A spring member that urges the lock member in a direction to lock the pin, the spring member extending from the winding portion wound around the shaft portion, and the release lever A first end abutting against the back surface of the winding, and the winding portion And a second end portion that abuts against the second flat plate, and the second flat plate is provided with a restriction portion that restricts the second end portion from moving in a direction away from the first flat plate. It is characterized by.

  In this connector, since the second end portion of the spring member that contacts the second flat plate is provided with a restriction portion that restricts the movement of the second end portion in the direction away from the first flat plate, the second end portion of the spring member is Movement in the direction away from the first flat plate can be suppressed, and safety can be improved.

  The connector according to a second aspect is characterized in that the restricting portion is a concave portion formed in the second flat plate.

  In this connector, since the restricting portion is a recess formed in the second flat plate, it is possible to suppress the movement of the second end portion of the spring member in the direction away from the first flat plate with an easy configuration, and safety is improved. It can be improved. Moreover, since the 2nd end part of a spring member is arrange | positioned in a recessed part, it becomes difficult for the user of a work bench to touch a 2nd end part, and can improve safety | security more.

  A work table according to a third device is characterized by including the connector described in the first or second device.

  In this work table, it is possible to prevent the second end of the spring member from moving in a direction away from the first flat plate, and it is possible to provide a work table that can improve safety.

  According to this device, the second end portion of the spring member is provided with the restriction portion that restricts the second end portion of the spring member that contacts the second flat plate from moving in the direction away from the first flat plate. Can be prevented from moving away from the first flat plate, and safety can be improved.

It is a front view of the stepladder (work bench) concerning the embodiment of the present invention. It is a side view of the stepladder (work bench) concerning the embodiment of the present invention. It is a front view in the stowed state of the stepladder (work bench) concerning the embodiment of the present invention. It is the A section enlarged view of FIG. (A) is a front view of the coupler concerning embodiment of this invention, (b) is the right view. (A) is a front view when the lock mechanism is removed from the coupling tool, (b) is a right side view thereof, and (c) is an enlarged view of a portion B of (b). (A) is the front view of a lock member, (b) is the figure which looked at the lock member from the back side of the release lever. (A) is a front view of the spring member, (b) is a plan view thereof, and (c) is a right side view thereof. (A) is the front view of the step (working platform) concerning the modification of this invention, (b) is the side view, (c) is the top view. It is the C section enlarged view of Fig.7 (a). It is a front view at the time of using the stepladder concerning embodiment of this invention as a ladder (work bench). It is an example of the coupling tool for demonstrating the subject of this invention, (a) is a front view of a coupling tool, (b) is the right view, (c) is the 1st of a spring member. It is a front view of a connector in case 2 ends protrudes from the 2nd flat plate.

  Hereinafter, a connector according to an embodiment of the present invention will be described with reference to FIGS. A connector according to an embodiment of the present invention is used for a work table such as a stepladder, a step ladder, and a ladder. However, the work table is not limited to a stepladder, a step platform, and a ladder. In the following embodiments, a case where the connector is used for a stepladder will be described.

[Overall configuration of stepladder 1]
As shown in FIGS. 1 a to 1 c, the stepladder 1 (work bench) has a pair of legs 2 and 3 and a fixing mechanism 4 for keeping the opening angle of the legs 2 and 3 constant. . One fixing mechanism 4 is provided on each of the front side shown in FIG. 1a and the back side opposite thereto. However, a plurality of fixing mechanisms 4 may be provided on each of the front side and the back side, for example, or may be provided only on one side. The leg parts 2 and 3 are connected by the top connection part 5 so that rotation is possible. Each of the leg portions 2 and 3 has two leg main bodies (for example, the leg portion 2 has leg main bodies 2a and 2b as shown in FIG. 1b) and a plurality of step bars 6 that connect the leg main bodies. And have. Moreover, the leg parts 2 and 3 have the pins 7 and 8 on the front side shown in FIG. 2 and the back side opposite to it, respectively. The pins 7 and 8 are provided, for example, between the uppermost step rail 6 and the top connection portion 5. However, the positions of the pins 7 and 8 may be lower than that.

  As shown in FIG. 2, the fixing mechanism 4 includes a fixture 9 that is rotatably connected to a pin 7, one end rotatably fixed to the fixture 9, and the other end attached to and detached from the other pin 8. It has the connector 10 (connector of this invention) connected so that it is possible. When the stepladder is used, the user opens the legs 2 and 3 and installs them at the work place, and uses the step pier 6 to perform work at a high place. In that case, the leg parts 2 and 3 are fixed by connecting the connection tool 10 to the pin 8. Thereby, the opening angle of the leg parts 2 and 3 can be kept constant, and the stability of the stepladder 1 can be improved.

  On the other hand, after use, the connector 10 is removed from the pin 8, the legs 2 and 3 are closed, and the stepladder 1 is stored. As shown in FIG. 1c, when the stepladder is stored, the connecting portion 10 is again connected to the pin 8 with the legs 2 and 3 closed, and the fixture 9 and the connecting device 10 are inverted V-shaped. It is possible to store. Thereby, it can prevent that the connector 10 will be in the state suspended from the pin 7 at the time of storing stepladder. However, when the stepladder is stored, the connector 10 may remain suspended from the pin 7. Further, by installing another pin for storing the stepladder on the leg portion 2 and connecting the connector 10 to the other pin when storing the stepladder, the connector 10 is suspended from the pin 7. May be prevented. In addition, although the case where the fixing mechanism 4 includes the fixing tool 9 and the connecting tool 10 has been described above, the fixing tool 9 may not be provided. That is, one end of the connector 10 may be connected and fixed to the pin 7 so as to be rotatable.

  The fixture 9 is made of metal, for example, and has a flat plate 9a and holes 9b and 9c provided at both ends in the longitudinal direction of the flat plate 9a as shown in FIG. The hole 9b on one end side in the longitudinal direction is rotatably connected and fixed to the pin 7 of the leg portion 2 so that the fixture 9 cannot be removed from the pin 7. Further, the hole 9c on the other end side in the longitudinal direction is connected and fixed to the connector 10 so as to be rotatable.

  As shown in FIGS. 3 to 6, the connector 10 is attached to the first flat plate 11 having an engagement groove 12 that engages with the pin 8 provided on the stepladder 1, and the pin 8 is attached to the first flat plate 11. It has a lock mechanism 20 that locks the pin 8 so as not to be disengaged from the engagement groove 12, and a second flat plate 30 that extends from the first flat plate 11 to the lock mechanism 20 side. As shown in FIG. 2, the lock mechanism 20 and the second flat plate 30 are disposed outside the first flat plate 11 with respect to the stepladder 1.

  As shown in FIGS. 3 to 4, the first flat plate 11 is, for example, rectangular and made of metal, and a hole 14 is formed in one end 13 in the longitudinal direction. The hole 14 and the hole 9 c of the fixture 9 Is fixed rotatably by an intermediate pin 9d (see FIG. 2). Therefore, the fixing tool 9 and the connecting tool 10 cannot be removed. The engagement groove 12 is provided at the other end 15 in the longitudinal direction of the first flat plate 11 and the one end 16 in the width direction of the first flat plate 11. The engaging groove 12 has a lateral width (a width along the longitudinal direction of the first flat plate 11) larger than the outer diameter of the pin 8, so that the pin 8 can be easily inserted. The engaging groove 12 has a depth larger than the outer diameter of the pin 8 (depth in the width direction of the first flat plate 11) so that the pin 8 cannot be easily removed.

  As shown in FIGS. 3 to 6, the lock mechanism 20 includes a shaft portion 21 attached to the first flat plate 11, a hook 23 that is rotatably attached to the shaft portion 21, and locks the pin 8. It has a lock member 22 having a release lever 24 for releasing the lock, and a spring member 25 that urges the lock member 22 in a direction to lock the pin 8. The shaft portion 21 and the lock member 22 are made of metal, for example, and the spring member 25 is made of a metal wire such as a wire. The spring member 25 extends from the winding portion 26 wound around the shaft portion 21, the first end portion 27 that contacts the back surface 24 b of the release lever 24, and the winding portion 26. And a second end portion 28 that abuts against the two flat plates 30. As described above, the first end portion 27 abuts on the back surface 24 b of the release lever 24 and the second end portion 28 abuts on the second flat plate 30, so that the spring member 25 is connected between the release lever 24 and the second flat plate 30. A biasing force that functions as a spring and biases the pin 8 in a locking direction is applied to the lock member 22.

  As shown in FIG. 3A, the shaft portion 21 is provided between the other end portion 15 in the longitudinal direction of the first flat plate 11 and between the engagement groove 12 and the second flat plate 30. The engaging groove 12 and the shaft portion 21 overlap at least partly or entirely in the longitudinal direction of the first flat plate 11. The shaft portion 21 is attached to a hole 18 (see FIG. 4A) formed in the first flat plate 11. The shaft portion 21 is a rivet, for example, and is attached to the first flat plate 11 by caulking the tip portion inserted into the hole 18 on the back surface of the first flat plate 11. The hole 18 is at least partially or entirely overlapped with the engaging groove 12 in the longitudinal direction of the first flat plate 11. As shown in FIG. 3B, the tip 21 a of the shaft portion 21 has a larger diameter than other portions, and the winding portion 26 of the spring member 25 is prevented from coming off from the shaft portion 21. .

  The lock member 22 is rotatably attached to the shaft portion 21 when the shaft portion 21 is inserted into a hole 22 b (see FIG. 5A) formed in the lock member 22, and further than the engagement groove 12. The first flat plate 11 rotates between the engagement groove 12 and the second flat plate 14 at the other end in the longitudinal direction. As shown in FIG. 3A, the hook 23 is provided at the front end of the main body portion 22a of the lock member 22 in the rotational direction, and at least a part thereof overlaps the engagement groove 12 in plan view. The hook 23 serves to prevent the pin 8 engaged with the engagement groove 12 from being detached from the engagement groove 12. Although not shown in FIG. 3A, in the state where the pin 8 is not locked in the engagement groove 12, the front end portion 22c of the main body portion 22a of the lock member 22 in the rotational direction (FIG. 5A). Reference) may overlap with the engaging groove 12. Thereby, in the state where the pin 8 is locked, the tip end portion 22c in the rotation direction always presses the pin 8, so that the pin 8 can be locked more firmly.

  The release lever 24 is provided at the rear end in the rotation direction of the main body 22a of the lock member 22, and specifically extends so as to intersect with the main body 22a. As shown in FIG. 5A, the release lever 24 has a front surface 24a and a back surface 24b. The surface 24 a is a part used for the release operation of the release lever 24. For example, the abdomen of the thumb is brought into contact with the surface 24a, the release lever 24 is pressed toward the second flat plate 30 with the thumb, and the lock member 22 is rotated toward the second flat plate 30. Then, the hook 23 does not overlap the engagement groove 12 in plan view, and the lock of the pin 8 can be released. As a result, the connection between the connecting portion 10 and the pin 8 can be released. Moreover, as shown in FIG.5 (b), the hollow 24c is formed in the back surface 24b. The first end portion 27 of the spring member 25 is in contact with the recess 24 c so that the first end portion 27 is unlikely to come off from the back surface 24 b of the release lever 24.

  As shown in FIG. 3, the second flat plate 30 extends from the other side portion 17 in the width direction of the first flat plate 11 to the locking mechanism 20 side so as to intersect the first flat plate 11, specifically, substantially orthogonally. It is a flat plate and is made of metal. As shown in FIG. 3B, the height of the second flat plate 30 is substantially the same as the height of the shaft portion 21 and the release lever 24, and is shorter than the width of the first flat plate 11. Further, the height of the second flat plate 30 is shorter than the length from the winding portion 26 of the spring member 25 to the second end portion 28.

  As shown in FIGS. 3 to 4, the second flat plate 30 has a recess 31 that restricts the second end portion 28 of the spring member 25 from moving in the direction away from the first flat plate 11 (the restricting portion of the present invention). The second end 28 of the spring member 25 is in contact with the recess 31. Therefore, even when the release lever 24 is operated and the pin 8 is repeatedly locked and released, the second end portion 28 of the spring member 25 becomes the first even if the winding portion 26 of the spring member 25 is loosened. The movement away from the flat plate 11 is suppressed. As a result, the second end portion 28 of the spring member 25 does not protrude outward from the second flat plate 30, and the user is prevented from touching the second end portion 28 and being injured.

  As shown in FIG. 4, the recess 31 is provided at one end 32 in the longitudinal direction of the second flat plate 30, and one end 31 a of the recess 31 extends to the end 32 a of the one end 32 in the longitudinal direction. As shown in FIG. 4B, the recess 31 is in the vicinity of the first flat plate 11, and specifically, is positioned closer to the first flat plate 11 than the center in the width direction of the second flat plate 30. Further, the cross-sectional shape of the recess 31 is substantially semicircular, and the width W of the recess 31 is made sufficiently larger than the outer diameter of the second end portion 28 of the spring member 25 as shown in FIG. ing. Further, the depth H of the recess 31 is also sufficiently larger than the outer diameter of the second end portion 28 of the spring member 25. Therefore, in a state where the second end portion 28 of the spring member 25 is disposed in the recess 31, it is difficult for the user to touch the second end portion 28, and the user touches the second end portion 28. Injuries are prevented. As shown in FIG. 4A, the length of the recess 31 extends from the end portion 32 a of the one end portion 32 in the longitudinal direction to a position overlapping the engagement groove 12 in the longitudinal direction of the first flat plate 11.

  However, the one end 31 a of the recess 31 may not extend to the end 32 a of the one end 32 in the longitudinal direction, or may be located on the opposite side of the first flat plate 11 from the center in the width direction of the second flat plate 30. The cross-sectional shape is not limited to a substantially semicircular shape. The width W and depth H of the recess 31 can also be changed to appropriate sizes. Furthermore, the length of the recess 31 may extend only to the front of the engagement groove 12 in the longitudinal direction of the first flat plate 11 or may extend to the back of the engagement groove 12.

[effect]
In the connector 10, a restricting portion (concave portion 31) that restricts movement of the second end portion 28 of the spring member 25 that contacts the second flat plate 30 in a direction away from the first flat plate 11 is provided. The second end portion 28 of the spring member 25 can be prevented from moving in the direction away from the first flat plate 11, and safety can be improved.

  Moreover, in this connector 10, since a control part is the recessed part 31 formed in the 2nd flat plate 30, the 2nd end part 28 of the spring member 25 moves to the direction away from the 1st flat plate 11 with an easy structure. Can be suppressed and safety can be improved. Moreover, since the 2nd end part 28 of the spring member 25 is arrange | positioned in the recessed part 31, it becomes difficult for the user of the stepladder 1 (work bench) to touch the 2nd end part 28, and safety can be improved more.

  Moreover, it can suppress that the 2nd end part 28 of the spring member 25 moves to the direction away from the 1st flat plate 11, and can provide the stepladder 1 which can improve safety | security.

  As mentioned above, although embodiment of this invention was described based on drawing, a specific structure is not limited to these embodiment. The scope of the present invention is shown not by the above description of the embodiment but by the utility model registration request, and further includes all modifications within the meaning and scope equivalent to the scope of the utility model registration request.

[Modification]
Although the said embodiment demonstrated the case where the coupling tool 10 was used for the stepladder 1, as shown in FIG.7, 8, the coupling tool 10 was generally used for the step platform 50 (working platform) whose top is lower than a stepladder. May be. The step platform 50 includes a top plate 51 and legs 52 and 53 used for placing a foot or placing an object. In the above embodiment, the connecting tool 10 is used to fix the legs 2 and 3 together. However, in this step 50, the connecting tool 10 connects the top plate 51 and the leg portion 52, and the top plate 51 and the leg portion 53. Used to do. Specifically, as shown in FIG. 9, one end of the connector 10 is rotatably connected and fixed to the pin 54 on the top plate 51 side, and the engagement groove 12 on the other end side is attached to and detached from the pin 55 of the leg portion 53. Detachable as possible. Thereby, the opening angle of the leg parts 52 and 53 of the step 50 can be kept constant, and the stability of the step 50 can be improved. However, one end of the connector 10 may be rotatably connected to the pin 55 of the leg portion 53, and the engagement groove 12 on the other end side may be detachably attached to the pin 54 on the top plate 51 side. In addition, when the connection tool 10 is used for the step platform 50, the connection tool 10 is used independently, However The connection tool 10 may be used with the fixing tool 9 like the stepladder 1 of the said embodiment.

  Moreover, the stepladder 1 of the said embodiment can be used as a ladder (work bench | platform) by opening the leg parts 2 and 3 180 degrees, as shown in FIG. Even in this case, the opening angle of the legs 2 and 3 of the stepladder 1 can be kept constant (180 degrees) by being connected to a pin used when the connecting tool 10 of the connecting mechanism 4 is used as a ladder. The stability of the stepladder 1 can be improved.

  Moreover, in the said embodiment, about the case where the recessed part 31 is provided in the 2nd flat plate 30 as a control part which controls that the 2nd end part 28 of the spring member 25 moves to the direction away from the 1st flat plate 11. FIG. Although demonstrated, a control part is not restricted to a recessed part. For example, the restricting portion may be a convex portion provided outside the first flat plate 11 with respect to the portion where the second end portion 28 of the second flat plate 30 abuts.

1 Stepladder (workbench)
2, 3 Leg 8 Pin 10 Connector 11 First flat plate 12 Engagement groove 20 Lock mechanism 21 Shaft 22 Lock member 23 Hook 24 Release lever 24b Back surface 25 Spring member 26 Winding portion 27 First end portion 28 Second end Part 30 Second flat plate 31 Concave part (regulator part)
50 Step (work bench)

Claims (3)

A connector for keeping the opening angle of the leg of the work table constant,
A first flat plate having an engaging groove for engaging with a pin provided on the work table;
A locking mechanism that is attached to the first flat plate and locks the pin so that the pin does not come off the engagement groove;
A second flat plate extending from the first flat plate toward the lock mechanism,
The locking mechanism is
A shaft portion attached to the first flat plate;
A lock member rotatably attached to the shaft portion and having a hook for locking the pin and a release lever for releasing the lock of the pin;
A spring member that urges the lock member in a direction to lock the pin,
The spring member is
A winding portion wound around the shaft portion;
A first end extending from the winding portion and contacting the back surface of the release lever;
A second end extending from the winding portion and contacting the second flat plate,
In the second flat plate,
A connecting part, characterized in that a restricting part for restricting movement of the second end part in a direction away from the first flat plate is provided.   The connector according to claim 1, wherein the restricting portion is a recess formed in the second flat plate. A workbench comprising the connector according to claim 1.

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