JP4058006B2 - Rotating bracket for work bench - Google Patents

Description

  The present invention relates to a rotating bracket that opens and closes a leg portion with respect to a top plate portion in a workbench provided with leg portions that can be opened and closed between an open leg state and a closed leg state at both ends of the top plate portion. .

  7A is a front view showing the work table K described in Patent Document 1 in an open leg state, FIG. 7B is a side view, and FIG. 7C is a front view showing the work table K in a closed leg state. FIGS. 8A and 8B show a detailed configuration of the rotating bracket 21 of the work table K. FIG. 8A is a front view in an open leg state, and FIG. 8B is a front view in a closed leg state. The work table K has legs that can be opened and closed between a closed leg state folded substantially parallel to the lower surface of the top plate part 2 and an open leg state standing downward at the left and right ends of the work top part 2. Part 3 is provided. The leg portion 3 is formed by a plurality of steps 3b between the pair of leg posts 3a, 3a. The leg portion 3b includes a front and rear ends of the left and right ends of the top plate portion 2 and leg posts 3a of the leg portions 3, 3. The outer surface of 3a is connected by the rotating metal fitting 21 so that opening / closing rotation is possible.

  As shown in FIG. 8, the rotary fitting 21 is configured to be connected to a metal plate connecting plate 6 fixed to the leg portion 3 on the outside of a steel plate mounting plate 5 fixed to the top plate portion 2. Specifically, a contact surface 18 is formed over the appropriate range from the side edge of the top plate portion 2 at the lower end edge of the mounting portion 5a with respect to the top plate portion 2 of the mounting plate 5, and at the center of the lower end portion of the mounting portion 5a. A pivotal protrusion 5b through which the pivotal shaft 7 passes is formed. A fan-shaped connecting portion 6b is formed obliquely upward from one side of the upper end portion of the attaching portion 6a with respect to the leg portion 3 of the connecting plate 6, and the other side is bent in an L shape so that the attachment plate 5 is in an open leg state. A contact surface 19 is formed in contact with the contact surface 18 at the lower end to prevent further rotation, and the pivot shaft 7 is passed through the lower end portion of the connecting portion 6b. A pin hole 10 is formed in the lower part of the mounting portion 5a of the mounting plate 5, and a pin 4 for biasing a compression spring (not shown) is provided so as to protrude from the pin hole 10 toward the connecting plate 6. The connecting portion 6b of the plate 6 is formed with engaging pin holes 12a and 12b into which the pin 4 fits and engages with the pin hole 10 when the leg portion 3 is in the open leg state and the closed leg state, respectively.

  Thus, when the work table K is in the closed leg state shown in FIG. 7 (c), as shown in FIG. 8 (b), the pin 4 penetrating the pin hole 10 of the mounting plate 5 is pressed by the compression spring. The protrusion 3 is urged and fitted into the engagement pin hole 12b of the connecting plate 6, and the leg 3 is locked in this closed leg state. When the work table K is used, the pin 4 is detached from the engagement pin hole 12b of the connecting plate 6, and the leg 3 is turned downward by rotating the leg 3 downward. In the open leg state, the projectingly biased pin 4 is fitted into and engaged with the engagement pin hole 12a of the connecting plate 6 and locked in the open leg state shown in FIGS. 7 (a) and 7 (b).

In addition, in this rotary metal fitting 21, in order to lock the leg part 3 in the open leg state, a lock mechanism comprising contact surfaces 18 and 19 is provided together with a pin lock mechanism comprising the pin 4 and the engaging pin hole 12a. This is because the rigidity of the pin 4 and the pin hole 10 and the engaging pin hole 12a alone is insufficient or loose due to the clearance between the pin 4, the pin hole 10 and the engagement pin hole 12a. This is to improve deficiencies and rattling.
JP-A-8-232299

  According to the rotating bracket 21 of the workbench K described in Patent Document 1, the mounting plate 5 side of the contact surfaces 18 and 19 that come into contact with each other in the open state of the workbench K and prevent further rotation. The contact surface 18 is a straight contact surface that uses the plate thickness surface of the steel plate material forming the mounting plate 5 as it is. The contact surface 19 on the connecting plate 6 side is the end of the connecting plate 6. Since it is composed of a bent end surface that is bent in an L shape, when an excessive load is applied to the work table K, the contact surface 19 formed of the L-shaped bent end surface is deformed as described above, and functions as a stopper. There was a risk that it would stop. In order to eliminate such deformation, it is conceivable to use a plate having a considerably large thickness. However, in this case, the material cost is high and the manufacturing process is difficult, and the cost of the rotating bracket is high. There is a problem.

  In view of the above problems, an object of the present invention is to provide a rotating metal fitting that is easy to manufacture and can be manufactured at a low cost without changing the plate thickness and without causing deformation of the contact surface.

  Means for solving the above problems will be described with reference numerals in the embodiments described later. The invention according to claim 1 is that the leg portions 3 are opened at the both ends of the top plate portion 2 by the rotating brackets. In a worktable that can be opened and closed between a closed leg state, the rotating brackets 1A, 1B, 2A, 2B superimpose a mounting plate 5 fixed to the top plate portion 2 and a connecting plate 6 fixed to the leg portion 3. The mounting plate 5 is pivotally connected to the pivot shaft 7 and is provided with contact surfaces 8 and 9 that contact the mounting plate 5 and the connecting plate 6 in an open leg state to prevent further rotation. The pin 4 that protrudes and urges toward the connecting plate 6 from the pin hole 10 on the side is provided, and the engaging pin hole 12a into which the open leg state pin 4 is fitted and engaged is provided on the connecting plate 6, and they are in contact with each other. Either the contact surface 8 on the plate 5 side or the contact surface 9 on the connecting plate 6 side uses the plate thickness surface of the plate material as it is. It consists of a straight contact surface, and the other contact surface 9 or 8 is an end surface of the cut-up portion Q or the pull-up portion P by causing the side portion of the plate material to be cut or causing the end portion of the plate material to be cut. It is characterized by comprising a curved contact surface formed in the plate thickness surface portion.

  The effect of the invention by the above-described solution means will be described with reference numerals of the embodiments described later. According to the invention of claim 1, it is connected to the contact surface 8 on the mounting plate 5 side that abuts each other in the open leg state. Any one of the contact surfaces 9 on the side of the plate 6 is a straight contact surface using the plate thickness surface of the plate material as it is, and the other contact surface is cut into a required portion of the side surface portion of the plate material. It consists of a curved contact surface which is an end surface of the cut and raised portion Q formed by causing the portion to cross the one contact surface, or so that a required end portion of the plate material crosses the one contact surface. Therefore, even if an excessive load is applied to the work table, the contact surfaces 8 and 9 do not come into contact with the conventional rotating metal fittings. Such as deformation Door without, it is possible to maintain the stopper function. In addition, one of the contact surfaces consists of the plate thickness surface of the plate material as it is, and the other contact surface is formed of a curved contact surface formed by cutting or raising, making the manufacturing process easy. The cost of the rotating bracket can be reduced.

  A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a work table K1 provided with a rotating metal fitting 1A according to the present invention, and (a) in FIG. 2 is surrounded by an arrow X in FIG. (B) is an enlarged sectional view taken along line II in (a), and (c) is an enlarged sectional view taken along line in (a). As with the work table K shown in FIG. 7, the work table K <b> 1 stood up on both the left and right ends of the work-use top plate part 2 and in a closed leg state folded substantially parallel to the lower surface of the top plate part 2 and downward. The leg part 3 is provided so as to be openable and closable between the open leg state, and the front and rear ends of the left and right ends of the top plate part 2 and the outer surfaces of the leg posts 3a and 3a of the leg parts 3 and 3 It is connected by 1A so that opening and closing rotation is possible.

  The rotating metal fitting 1A is connected to a steel plate connecting plate 6 fixed to the leg portion 3 on the outside of a steel plate mounting plate 5 fixed to the top plate portion 2, and is shown in detail in FIG. As shown, a contact surface 8 is formed at the center of the top end of the mounting portion 5a with respect to the top plate portion 2 of the mounting plate 5, and the pivot shaft 7 penetrates the pivot shaft 7 at the center of the bottom portion of the mounting portion 5a. Part 5b is formed. As shown in FIG. 2 (a), the upper end of the right edge of the attachment portion 6a with respect to the leg portion 3 of the connecting plate 6 abuts against the contact surface 8 of the attachment plate 5 in an open leg state and rotates further. A contact surface 9 is formed, and the pivot shaft 7 passes through the central portion of the connecting portion 6b. A pin hole 10 is formed in the lower part of the mounting portion 5a of the mounting plate 5, a pin 4 that is urged by a compression spring (not shown) is provided so as to protrude from the pin hole 10 toward the connecting plate 6, and The connecting portion 6b of the connecting plate 6 is formed with engaging pin holes 12a and 12b into which the pin 4 fits and engages with the pin hole 10 in the open leg state and the closed leg state, respectively.

  In the rotating metal fitting 1A, the contact surface 9 on the connection plate 6 side among the contact surfaces 8 and 9 that are in contact with each other is a steel plate material forming the connection plate 6 as shown in FIGS. 2 (b) and 2 (c). It consists of a straight contact surface using the plate thickness surface as it is. The contact surface 8 on the mounting plate 5 side is a curved contact surface as shown in FIG. In order to form the contact surface 8 on the mounting plate 5 side, the upper end side central portion of the tip of the mounting portion 5a is moved outward as shown in FIG. 5B (that is, the contact surface 9 on the connecting plate 6 side). 2), which is the end face of the raised part P that has been raised, the angled plate thickness surface part shown in FIG. Become.

  3A is a rotating metal fitting 1B similar to the rotating metal fitting 1A shown in FIG. 2A. In this rotating metal fitting 1B, the contact surface 8 on the attachment plate 5 side forms the attachment plate 5. FIG. The rotating metal fitting 1A is composed of a straight contact surface using the plate thickness surface of the steel plate to be used as it is, and the contact surface 9 on the connecting plate 6 side is formed of a curved contact surface as shown in FIG. Is different. In order to form the contact surface 9 on the connecting plate 6 side of the rotating metal fitting 1B, the upper end of the right edge of the connecting portion 6a is directed inward (that is, the contact surface on the mounting plate 5 side) as shown in FIG. By causing it to project in a chevron shape (in a direction crossing 8), an angled plate-shaped surface portion as shown in FIG. It becomes.

  FIG. 4 shows a work table K2 equipped with the rotating metal fitting 2A according to the present invention, FIG. 5 (a) is an enlarged view of a portion surrounded by an arrow Y in FIG. 4, and (b) is a ho-ho of (a). (C) is an enlarged sectional view taken along the line H of (a). As shown in FIG. 5A, the rotating bracket 2A of the work table K2 has a contact surface 8 formed at a required portion on the side of the side of the connecting portion 5b of the mounting plate 5, and the connecting portion 6b of the connecting plate 6. A contact surface 9 is formed at the upper left edge of the upper end to contact the contact surface 8 of the mounting plate 5 in an open leg state and prevent further rotation. Since other configurations are the same as those of the rotating metal fittings 1A and 1B described above, only the reference numerals are given and description thereof is omitted.

  In the rotating metal fitting 2A, the contact surface 9 on the side of the connecting plate 6 is a straight contact surface using the plate thickness surface of the steel plate material forming the connecting plate 6 as it is, as shown in FIG. The contact surface 8 on the mounting plate 5 side is a curved contact surface as shown in FIGS. 2 (b) and 2 (c). In order to form the contact surface 8 on the mounting plate 5 side, a notch (not shown) is made in a required portion on the front end side of the side surface of the attaching portion 5a, and the notched portion is as shown in FIG. 2 (b) and (c) in FIG. 2 which are end faces of the cut-and-raised part Q by causing the cross-section to protrude outward (that is, in a direction crossing the contact surface 9 on the connecting plate 6 side). The plate-shaped surface portion having a mountain-shaped curve as shown in FIG.

  6 (a) shows a rotating metal fitting 2B similar to the rotating metal fitting 2A shown in FIG. 5 (a). In this rotating metal fitting 2B, the contact surface 8 on the mounting plate 5 side (the lower end edge of the connecting portion 5b) is shown. Is formed of a straight contact surface using the plate thickness surface of the steel plate material forming the mounting plate 5 as it is, and the curved contact surface formed by the contact surface 9 on the connecting plate 6 side being caused. The point which consists of differs from 2A of rotation metal fittings. In order to form the contact surface 9 on the side of the connecting plate 6 of the rotating metal fitting 2B, a notch (not shown) is made in a required portion on the left side of the side portion of the connecting portion 6a, and the notched portion is shown in FIG. As shown in the drawing, the curved plate thickness surface portion which is the end surface of the cut and raised portion Q is caused by inwardly projecting so as to protrude in a circular arc shape (that is, in a direction crossing the contact surface 8 on the mounting plate 5 side). Is the contact surface 9.

  As can be seen from the above description of the embodiment, in the rotating brackets 1A, 1B, 2A, 2B of the present invention, when the work tables K1, K2 are in the open leg state, they contact each other on the side of the mounting plate 5 that abuts each other. Either the contact surface 8 or 9 of the surface 8 and the contact surface 9 on the connecting plate 6 side is a straight contact surface using the plate thickness surface of the steel plate as it is, and the other contact surface 9 or 8 is From the curved contact surface which is the end surface of the cut and raised portion Q formed by making a cut in a required portion of the side surface portion of the steel plate material and causing the cut portion in a direction crossing the one contact surface 8 or 9 Or a curved contact surface which is an end surface of the pulling portion P formed by causing the required end portion of the steel plate material in a direction crossing the one contact surface 8 or 9, so that the work table K Even if an excessive load is applied to the Face 8, 9 without such deformed as contact surface 18, 19 of a conventional rotary bracket 21 as shown in FIG. 8, it is possible to maintain the stopper function.

  In addition, one contact surface 8 or 9 is formed by using the plate thickness surface of the plate as it is, and the other contact surface 9 or 8 is formed by a curved contact surface formed by cutting or raising, so that it can be manufactured. It becomes easy and can reduce the cost of the rotary fittings 1A, 1B, 2A, 2B.

It is a front view of work bench K1 provided with rotating metal fitting 1A concerning the present invention. (a) is an enlarged view of a portion surrounded by an arrow X in FIG. 1, (b) is an enlarged sectional view taken along the line II in (a), and (c) is an enlarged sectional view taken along the line in (a). . (a) is a rotating metal fitting 1B similar to the rotating metal fitting 1A, but is an enlarged view similar to (a) in FIG. 2 showing the case where the contact surface is provided at a different position, and (b) is a -An enlarged sectional view of line C, (c) is an enlarged sectional view of the knee line of (a). It is a front view of work bench K2 provided with 2A of rotation metal fittings concerning the present invention. (a) is an enlarged view of a portion surrounded by an arrow Y in FIG. 4, (b) is an enlarged sectional view of the hoho line of (a), and (c) is an enlarged sectional view of the hae line of (a). . (a) is a rotating metal fitting 2B similar to the rotating metal fitting 2A, but is an enlarged view similar to (a) in FIG. FIG. (a) is a front view showing a conventional workbench K described in Patent Document 1 in an open leg state, (b) is a side view, and (c) is a front view showing the workbench K in a closed leg state. . The detailed structure of the rotation metal fitting 21 of the worktable K is shown, (a) is a front view in the open leg state, (b) is a front view in the closed leg state.

Explanation of symbols

K1, K2 Worktable 1A, 1B Rotating bracket 2A, 2B Rotating bracket 2 Top plate portion 3 Leg portion 4 Pin 5 Mounting plate 6 Connecting plate 7 Pivoting shaft 8, 9 Contact surface 10 Pin hole P Pull-up portion Q Cut-off portion

Claims (1)

In a workbench in which legs are provided at both ends of the top plate so as to be openable and closable between an open leg state and a closed leg state by a rotating metal fitting,
The rotating bracket superimposes a mounting plate fixed to the top plate portion and a connecting plate fixed to the leg portion and connects the mounting plate and the connecting plate so that the mounting plate and the connecting plate can be rotated. A contact surface that prevents further rotation is provided, and a pin that protrudes and urges toward the connecting plate from the pin hole on the mounting plate side is provided, and the pin is engaged and engaged with the connecting plate in the open leg state and the closed leg state. With an engaging pin hole
One of the contact surface on the mounting plate side and the contact surface on the connecting plate side that are in contact with each other is a straight contact surface that uses the plate thickness surface of the plate as it is, and the other contact surface is a required part of the side surface of the plate material. A rotating metal fitting comprising a curved contact surface formed on a plate thickness surface portion which is an end surface of the cut-raised portion or the raised portion by causing the plate material to be raised or causing a required end portion of the plate material.

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