JP3118837U - Connecting structure of school desk and connecting tool used therefor - Google Patents

Abstract

Provided are a school desk connection structure, a connection tool, and a school desk, which can be easily connected and detached with one hand even when a plurality of school desks are arranged as one block.
A school in which a connecting means for a connecting side desk with respect to a connected side desk includes a board, a rotating shaft attached to the board, and a connecting arm that rotates in the horizontal direction around the rotating axis. In the desk connecting structure, the connecting arm of the connecting desk is provided with an engaging projection and a spring biasing means, the connected desk is provided with an engaging hole, and the engaging protrusion is engaged by the spring biasing means. The connecting arm is biased in the direction of locking with respect to the hole, and the connecting arm can secure a state where the engaging projection does not interfere with other objects against the spring biasing means when rotating. Connection structure of school desks configured to connect the school desks by engaging the joint holes [Selection] Fig. 4

Description

  The present invention relates to a connection structure for connecting a plurality of school desks each including a top plate and metal pipe legs, and a connector used for the connection structure.

  As is well known, school classrooms and the like use many school desks that are lightweight and easy to handle, which are a combination of a top plate and metal members. Since these desks are lightweight, they can be used in a free layout according to the purpose of use. For example, in order to arrange each group, two or more desks are abutted against each other, and this combination is continuously abutted to the side and arranged as one block of a total of four, six, etc. A single car may be separated and placed as a separate seat.

  Here, when a plurality of desks are arranged as one block, the desks are light in weight with a top plate and metal pipe legs. There are drawbacks that tend to occur.

  This distortion of the arrangement of the desks in the front, back, left and right is not only bad in appearance, but the corners and legs of the desk will jump out of the block, and the legs of the desk may be caught in the corners of the desk. There is a risk of unforeseen circumstances such as hitting a part of the body, which is very dangerous.

  In addition, school desks are required to be able to easily connect and disconnect between desks so that the layout can be freely changed as described above. In other words, work such as fixing the attachment / detachment of the desks with a screw each time the layout is changed in the classroom cannot be performed practically, and it is necessary to be able to connect them very easily.

  Prior arts related to the above are intended for tables, not school desks, and are provided with downward recesses at opposite positions on the lower surface of the top plate of each table to be connected. A connection port that opens to the end surface and communicates with each other, and that can rotate horizontally in a recess provided in one top plate so that the tip can protrude from the connection port to the end surface on the top plate side. A metal fitting is pivotally attached, an engagement port is provided at the projecting end, and a locking metal fitting with an upward engagement claw at the tip in a recess provided on the other top plate is pivotable up and down at the middle part. A table top plate connecting apparatus is known which is attached and elastically urges the rear end portion of the locking fitting downward by an elastic member (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 2-50230

  The table top plate connecting apparatus according to Patent Document 1 does not use a screwing means or the like in the operations of connecting and disconnecting the tables. However, it is very inconvenient because both hands must be used for connecting and disconnecting operations. That is, at the time of connection, one hand is used to hold the connection fitting in a rotated state, and in this state, one end of the engagement fitting is pressed by the finger of the other hand to be locked.

  For example, if only two tables are connected, it is necessary to perform the operation from the left and right sides of the connecting portion. In addition, in order to combine four or six school desks separately on the left and right into a single block, the above-mentioned operation with both hands under the desk (with the connecting bracket rotated during connection) It is necessary to use one hand to hold it, and in this state, press one end of the locking bracket with the finger of the other hand to lock it. It takes effort.

  The present invention has been made in view of the above circumstances, and even when arranging a plurality of school desks such as the above four, six, etc. as one block, it is possible to easily connect and disconnect with one hand. The provision of the school desk connection structure, the connection tool, and the school desk is a problem to be solved by the invention.

  Connection of a school desk, wherein the connecting means of the connecting side desk with respect to the connected side desk includes a board, a turning shaft attached to the board, and a connecting arm that turns horizontally about the turning axis. In the structure, the connecting arm of the connecting side desk is provided with an engaging protrusion and a spring urging means, the connected side desk is provided with an engaging hole, and the engaging protrusion is attached to the engaging hole by the spring urging means. The connecting arm is biased in the locking direction, and the connecting arm can secure a state in which the engaging protrusion does not interfere with other objects against the spring biasing means when rotating, and in the connected state, the engaging protrusion and the engaging hole are A school desk connection structure characterized by engaging and connecting school desks is used as a means for solving the problem.

  As a specific configuration thereof, (1) of the connection means between the connection side desk and the connected side desk, the connection means of the connection side desk includes a substrate, a rotation shaft attached to the substrate, and the rotation In a school desk connection structure including a connection arm that rotates in a horizontal direction around a moving axis, the connection arm of the connection side desk connects the base end member and the tip end member with a connection shaft, A knob is formed in the connecting portion of both the member and the tip member, and a spring biasing means is provided in a direction in which the base end member and the tip member are relatively opened. The connected side desk is provided with a substrate having an engagement hole, and the rotation operation is performed in a state in which the protrusion of the tip member is not interfered with other objects by gripping the knob. , A rotation operation is performed, and the projection of the tip member is engaged with the engagement hole of the board of the connected side desk. The connection structure of the school desk and (2) the connection means of the connection side desk to the connected side desk rotate in the horizontal direction around the rotation axis that can be attached to the board, the rotation axis. In a school desk connection structure comprising a moving connection arm, the connection arm of the connection-side desk includes an engagement protrusion, a positioning pin, and a rotation shaft, and the rotation shaft penetrates the substrate to raise the rotation shaft. A spring for biasing is arranged, the board is provided with a positioning hole corresponding to the positioning pin of the connecting arm, the connected side desk is provided with a board having an engagement hole, and the connecting arm is rotated It is possible to ensure that the engagement protrusion does not interfere with other objects against the spring biasing means, and in the connected state, the engagement protrusion and the engagement hole are engaged to connect the school desks to each other. It is based on the connection structure of the school desk characterized by this.

  According to the present invention, the connecting means of the connecting side desk with respect to the connected side desk includes a board, a rotating shaft attached to the board, and a connecting arm that rotates in the horizontal direction about the rotating axis. In the school desk connecting structure, the connecting arm of the connecting desk is provided with an engaging protrusion and a spring biasing means, the connected desk is provided with an engaging hole, and the engaging protrusion is provided by the spring biasing means. The connecting arm is biased in the direction of locking with respect to the engaging hole, and the connecting arm can secure a state where the engaging projection does not interfere with other objects against the spring biasing means when rotating. And the engagement hole engage with each other, and the school desks are connected to each other. Therefore, the projection can be easily inserted into and removed from the engagement hole by only rotating the connecting arm with one hand. It is possible to connect and disconnect the connected side desk and the connected side desk very easily.

  According to the second aspect of the invention, of the connecting means between the connecting side desk and the connected side desk, the connecting means of the connecting side desk includes a substrate, a rotating shaft attached to the substrate, and the rotating shaft. The connecting arm of the school desk is provided with a connecting arm that rotates in the horizontal direction about the base, and the connecting arm of the connecting side desk connects the base end member and the tip member with a connecting shaft, Knob portions are formed on both connecting portions of the distal end member, and a spring biasing means is provided in a direction in which the proximal end member and the distal end member are relatively opened. The connected side desk is provided with a substrate having an engagement hole, and the rotation operation grips the knob so that the engagement protrusion of the tip member does not interfere with other objects. According to the first aspect of the present invention, the state can be maintained, and the engagement protrusion of the tip member is engaged with the engagement hole of the substrate of the connected side desk. Like the proposal easily connected with one hand, it is possible to perform disengagement. Then, by picking the knob at the time of connecting / disconnecting operation, it is possible to easily realize a smooth operation without the protrusions interfering with other objects. In addition, a reliable shape state can be ensured by spring biasing simply by releasing the finger when engaging the protrusion and the engagement hole during connection.

  According to the third aspect of the present invention, the connecting means of the connecting side desk with respect to the connected side desk rotates in the horizontal direction around the board, the turning shaft attached to the board, and the turning axis. In the school desk connection structure, the connection arm of the connection-side desk includes an engagement protrusion, a positioning pin, and a rotation shaft, and the rotation shaft penetrates the substrate and resists the rise of the rotation shaft. The board is provided with a positioning hole corresponding to the positioning pin of the connecting arm, the connected side desk is provided with a board having an engagement hole, and the connecting arm is a spring when rotating. It is possible to ensure that the engagement protrusion does not interfere with other objects against the biasing means, and in the connected state, the engagement protrusion and the engagement hole are engaged to connect the school desks to each other. The effects similar to those of the first and second aspects can be realized with a very simple configuration. More specifically, the connecting arm can be integrally formed without being divided into a distal end member and a proximal end member.

  According to the fourth aspect of the invention, in addition to the configurations of the first to third aspects, each school desk to be connected is a connection structure for school desks that serves as both a connected side desk and a connected side desk. By doing so, since one connecting means is connected by two connecting arms, the number of connecting means can be reduced, and strong connection can be easily performed.

  According to the fifth aspect of the invention, in addition to the configuration of the second aspect of the invention, the connecting means of the connecting side desk or the connected side desk is L-shaped in a bottom view in which the two sides have a substantially right angle. A board having a contour, a connecting arm on one side of the board, an engagement hole on the other side of the board, and a connecting arm provided on one side of the board for engaging another connected desk Since the engagement holes provided on the other side of the substrate correspond to the connection arms of the other connection side desks, for example, four or six desks can be used as one block. Even when the arrangement is made (that is, a combination of facing and adjoining), it is possible to easily connect and disconnect school desks by using a common connector.

  According to the sixth aspect of the present invention, a board having an L-shaped profile in bottom view in which the angle between the two sides is substantially a right angle, and one side of the board is engaged with an engagement hole of another connected side desk. A connecting arm having an engaging projection for carrying out, and an engaging hole for engaging with an engaging projection formed on the connecting arm of another connecting side desk on the other side of the substrate, By attaching it to the four corners of the top plate of an existing school desk, a connection structure similar to that of the device according to claim 3 can be realized. Therefore, even if it is an existing school desk, even when four or six desks are arranged as one block, the school desk can be easily connected and detached.

  Further, as disclosed in the invention according to claim 7, the configuration of the school desk includes a board having an L-shaped profile in bottom view in which the included angles of the two sides are substantially right angles, A connection arm having a protrusion for engaging with an engagement hole of a connected side desk is provided, and an engagement for engaging with a protrusion formed on the connection arm of another connection side desk on the other side of the board. By the structure which provided the connector provided with the hole in the four corners of the top plate, the connection structure of the school desk which combined facing and adjoining can be implement | achieved easily.

  The invention according to claim 8 includes a substrate in which a standing wall is formed on the periphery of the lower plate, and a connecting arm that is attached to the substrate so as to be rotatable in a horizontal direction about a rotation axis. The connecting arm is formed with an engaging projection and a positioning pin for positioning the horizontal rotation at a position where the connecting arm does not interfere with the substrate, and a spring for urging the rotary shaft against rising is disposed. The board is a connecting tool provided with attachment means for the lower surface of the top plate, a positioning hole corresponding to the positioning pin, and an engaging hole corresponding to an engaging protrusion of another connecting tool. As with the device according to the present invention, the configuration can be very simple, the appearance is excellent, and the cost can be reduced.

  The present invention is a school in which a connecting means of a connecting side desk with respect to a connected side desk includes a board, a rotating shaft attached to the board, and a connecting arm that rotates horizontally around the rotating axis. In the desk connecting structure, the connecting arm of the connecting desk is provided with an engaging projection and a spring biasing means, the connected desk is provided with an engaging hole, and the engaging protrusion is engaged by the spring biasing means. The connecting arm is biased in the direction of locking with respect to the hole, and the connecting arm can secure a state where the engaging projection does not interfere with other objects against the spring biasing means when rotating. Engage with the joint hole to connect school desks, and each school desk to be connected serves as both a connected desk and a connected desk. An excellent school desk connection structure that can be detached has been realized.

Example 1
FIG. 1 is a front view of a coupler according to a first embodiment of the present invention, and (b) an explanatory view of a state in which a knob is operated, and FIG. 2 is a bottom view of the coupler according to the first embodiment of the present invention. FIG. 3 is a perspective view showing the school desk assembled by the connection structure of the school desk according to the first embodiment of the present invention, and FIG. 4 is omitted the leg portion of the school desk according to the first embodiment of the present invention. 5 is a bottom view showing the assembled state, FIG. 5 is a front view showing a connection structure between the connection fittings of the school desk according to the first embodiment, and FIG. 6 is an enlarged bottom view of part A in FIG.

  First, the connector 2 used for the connection structure of the school desk 1 which concerns on Example 1 is demonstrated.

  The connector 2 is provided at the four corners on the lower surface of the top board 10 of each school desk 1 (1a, 1b, 1c, 1d). As shown in FIGS. 1 and 2, the connector 2 according to the first embodiment includes a base plate 20 having an L-shaped profile when viewed from the bottom, and a connecting arm 25 attached to the base plate 20 with a rotation shaft 26. Yes.

  The substrate 20 has a configuration in which an upper plate 200 and a lower plate 201 each having an L-shaped outer shape are overlapped via a spacer 202, and the spacer 202 is an edge between the upper plate 200 and the lower plate 201. Only provided. In this configuration, the upper surface side of the upper plate 200 is the rear surface, the lower surface side of the lower plate 201 is the front surface, and the rear surface is attached to the lower surface 100 of the top plate 10 of the school desk 1.

  Attachment holes 204 for attaching the substrate 2 to the lower surface 100 of the top board 10 of the school desk 1 are formed in both ends 205a of the substrate 20 and the corners 205b of the L-shaped contour. The connecting arm 25 is attached to one side of the L-shaped contour of the lower plate 201 with the rotation shaft 26. The connecting arm 25 is configured to be rotatable in the horizontal direction around the rotation shaft 26. Further, a relief hole 205 for allowing the engagement protrusion 250 to be described later to escape when the connecting arm 25 is not used is provided on one side of the L-shaped contour of the lower plate 201.

  As shown in FIG. 1, the connecting arm 25 has a configuration in which a distal end member 252 and a proximal end member 253 are connected by a connecting shaft 21. One engaging protrusion 250 is erected on the tip member 252 upward. In this embodiment, the engagement protrusion 250 is formed by screwing a bolt into a screw hole 252 a provided in the tip member 252. A hooking portion 250 a that slightly protrudes in the proximal direction is formed at the distal end portion of the engagement protrusion 250.

  Further, the configuration in the vicinity of the connecting portion 21 is such that the connecting shaft 21 passes through the inside of the torsion coil spring 22 in the axial direction, and both ends of the connecting shaft 21 cannot be removed from the distal end member 252 and the proximal end member 253. It is set as the structure connected by. As means for making the connecting shaft 21 unremovable in this embodiment, the connecting shaft 21 itself is a bolt, one end of the connecting shaft 21 is a bolt head 210, and the other end is a double nut 211.

  If the front end side is assumed to be the front and the base end side is assumed to be the rear, the base end protrusion 253a is formed on the front end side of the base end member 253 obliquely downward and rearward. Further, a distal end protrusion 252a is formed on the proximal end side of the distal end member 252 so as to face obliquely downward and forward. One end of the torsion coil spring 22 is held by the base end knob protrusion 253a. Further, the other end of the torsion coil spring 22 is held by the tip knob protrusion 252a. With this configuration, a knob 254 is formed on the connecting arm 25.

  On the other hand, with respect to the other side constituting the L-shape of the substrate 20, an engagement hole 206 having a diameter larger than that of the engagement protrusion 250 is formed only in the lower plate 201.

  The connection structure of the school desk 1 in which the connector 2 having the above configuration is attached to the four corners of the lower surface 100 of the top board 10 will be described below.

  As shown in FIG. 3, the school desk 1 according to the first embodiment of the present invention has a structure in which two school desks 1 face each other and two sets of school desks 1 are connected side by side. In addition, a total of four school desks 1 are connected.

  Here, as shown in FIG. 4, the school desk 1 (1a) faces the school desk 1 (1b) and is adjacent to the school desk 1 (1c). The school desk 1 (1d) faces the school desk 1 (1c) and is adjacent to the school desk 1 (1b). In the connection structure of the school desk 1 which concerns on the present Example 1, each school desk 1 (1a, 1b, 1c, 1d) uses three connection tools 2 among the connection tools 2 provided in four corners for connection. .

  As shown in FIG. 4, the connector 2 of each school desk 1 has four connectors: a right front connector 2rf, a left front connector 2lf, a right rear connector 2rb, and a left rear connector 2lb. Pieces are installed. Each school desk 1 has a configuration in which the connectors 2 are connected to each other at the central portion in the assembled state and the central portions of each side in the assembled state.

  The connection configuration of the center portion of the assembled state is such that the engagement protrusion 250 of the connection arm 25 of the connection tool 2lf of the school desk 1a is engaged with the engagement hole 206 of the connection tool 2rf of the school desk 1b. The engagement protrusion 250 of the connection arm 25 of the connection tool 2rf of 1b is engaged with the engagement hole 206 of the connection tool 2lf of the school desk 1d, and the engagement protrusion of the connection arm 25 of the connection tool 2lf of the school desk 1d. 250 is engaged with the engagement hole 206 of the school desk 1c, and the engagement protrusion 250 of the connection arm 25 of the connection tool 2rf of the school desk 1c is engaged with the engagement hole 206 of the connection tool 2lf of the school desk 1a. Match.

  In addition, the connection configuration at the center of each side of the assembled state is that the engagement protrusions 250 of the connection arm 25 of the connection tool 2lf of the school desk 1b are engaged with the engagement holes 206 of the connection tool 2rf of the school desk 1a. The engagement protrusions 206 of the connection arm 25 of the connection tool 2lb of the school desk 1d are engaged with the engagement holes 206 of the connection tool 2rb of the school desk 1b, and the engagement holes 206 of the connection tool 2rf of the school desk 1d are engaged. The engaging projection 250 of the connecting arm 25 of the connecting tool 2lf of the school desk 1c is engaged with the engaging hole 206 of the connecting tool 2rb of the school desk 1d to the connecting arm 25 of the connecting tool 2lb of the school desk 1a. The engagement protrusion 250 is engaged.

  The engaging operation is such that when the proximal end protrusion 253a and the distal end protrusion 252a of the knob 254 in each connecting arm 25 are picked up with fingers, the tip of the torsion coil spring 22 resists the spring bias. The member 252 rotates about the connecting shaft 21, and the engagement protrusion 250 of the tip member 252 comes out of the escape hole 205 and moves downward. In this state, the horizontal rotation operation of the connecting arm 25 around the rotation shaft 26 becomes possible.

  Next, the engaging protrusion 250 of the connecting arm 25 is horizontally rotated onto the engaging hole 206, and the engaging protrusion 250 is engaged with the engaging hole 206. In the engaged state, a force in a direction in which the connecting arm 25 pushes the engaging protrusion 250 into the engaging hole 206 is always applied by the biasing of the torsion coil spring 22 in the connecting arm 25. For this reason, the engagement protrusion 250 is not inadvertently detached from the engagement hole 206.

  In the connection structure of the first embodiment, the connection tool 2rb of the school desk 1a, the connection tool 2lb of the school desk 1b, the connection tool 2lb of the school desk 1c, and the connection tool 2rb of the school desk 1c are not used. These metal fittings can be used when the school desk 1 is further connected. Further, by arranging the connecting tools at the four corners like the school desk 1 of the first embodiment, the other school desks 1 can be connected to the opposite position and the adjacent positions, and a very diverse layout can be easily performed. Can be realized.

  In addition, the engagement protrusion 250 attached to the connecting arm 25 according to the present invention is not limited to the bolt as shown in the first embodiment. A pin or the like can be used instead of the bolt. Various known shaft fixing structures can be employed.

(Example 2)
FIG. 7 is a front view of the connector according to the second embodiment of the present invention and a front view in partial cross section, FIG. 8 is an enlarged bottom view of the connector according to the second embodiment, and FIG. The perspective view which shows the school desk made into the assembly state by the connection structure of the school desk, FIG. 10 is a bottom view which shows the assembly state which abbreviate | omitted the leg part of the school desk which concerns on the Example 2, FIG. FIG. 12 is a partially enlarged bottom view of the assembled state of the school desk according to the second embodiment. FIG.

  Next, the connector 2 used for the connection structure of the school desk 1 which concerns on Example 2 of this invention is demonstrated. In addition, about the name and code | symbol of a part substantially common to Example 1 among this Example 2, it demonstrates using the same thing.

The connector 2 according to the second embodiment is provided at the center of each side of the lower surface 100 of the top board 10 of each school desk 1.
The basic configuration of the connector 2 according to the second embodiment is that a metal substrate 20 having a standing wall 207 formed on the periphery of the lower plate, and a horizontal axis with a rotation shaft 26 with respect to the lower plate 201 of the substrate 20. The metal connecting arm 25 is attached in a rotatable state.

  Here, the connecting arm 25 is formed by pressing a metal plate, and the two engaging projections 250 shorter than the height dimension of the upright wall 207 of the substrate 20 are integrated to form a distal end that does not interfere with the substrate 20. Formed on the side. Further, a positioning pin 251 is attached to the connecting arm 25 on the upper surface side in the vicinity of the rotation shaft 26 for restricting the rotation in the horizontal direction.

  Further, the rotating shaft 26 has a flange portion 260 formed at the lower end, and a coil spring 23 is provided between the flange portion and the lower plate of the substrate so that the rotating shaft passes therethrough. When the rotating shaft 26 is pulled downward by this configuration, the distance between the flange portion 260 and the lower plate 201 is narrowed, and a rebound elastic force is generated by the coil spring 23.

  The substrate 20 of the connector 2 according to the second embodiment includes an attachment hole 204 serving as attachment means for the lower surface 100 of the top plate 10, a positioning hole 208 for positioning by positioning the positioning pin 251 of the connection arm 25, and other connections. And an engagement hole 206 corresponding to the engagement protrusion 250 of the tool 2.

  The connection structure of the school desk 1 in which the connector 2 having the above configuration is provided at the center of each side of the lower surface 100 of the top board 10 will be described below.

  The connection structure of the school desk 1 according to the second embodiment of the present invention is similar to the first embodiment, in which two school desks 1 face each other and two sets of school desks are connected side by side. A total of four school desks 1 are connected. Here, as in the first embodiment, the school desk 1 (1a) faces the school desk 1 (1b) and is adjacent to the school desk 1 (1c). The school desk 1 (1d) faces the school desk 1 (1c) and is adjacent to the school desk 1 (1b). Moreover, as shown in FIG. 10, in the school desk connection structure according to the first embodiment, each school desk uses three connecting tools among the connecting tools provided at the four corners.

  As shown in FIG. 10, the connection tool 2 of each school desk 1 is attached with the front center connection tool 2f, the left connection tool 21, and the right connection tool 2r of the school desk. Each school desk has a configuration in which the connectors 2 are connected to each other at either the front center or the left or right in the assembled state.

  The coupling structure in the assembled state is such that the engagement protrusion 250 of the connection arm 25 of the connection tool 2l of the school desk 1a is engaged with the engagement hole 206 of the connection tool 2r of the school desk 1c to connect the school desk 1b. The engaging protrusion 250 of the connecting arm 25 of the tool 2f is engaged with the engaging hole 206 of the connecting tool 2f of the school desk 1a, and the engaging protrusion 250 of the connecting arm 25 of the connecting tool 2l of the school desk 1d is engaged with the school. Engage with the engagement hole 206 of the school desk 1b, and engage the engagement protrusion 250 of the connection arm 25 of the connection tool 2f of the school desk 1c with the engagement hole 206 of the connection tool 2f of the school desk 1d. At this time, since the hooking portion 250a is formed on the engaging protrusion 250, the hooking portion 250a slightly interferes with the edge on the upper surface side of the engaging hole 206, thereby further inadvertent connection. The release of the state can be prevented.

  In the engaging operation, each connecting arm 25 is pushed down with a finger against the spring bias of the coil spring 23. By this operation, the positioning pin 251 comes out of the positioning hole 208 and moves downward. In this state, the horizontal rotation operation of the connecting arm 25 around the rotation shaft 26 becomes possible.

  Next, the engagement protrusion 250 of the connecting arm 25 is horizontally rotated onto the target engagement hole 206, and the engagement protrusion 250 is engaged with the engagement hole 206. In the engaged state, a force in a direction in which the connecting arm 25 pushes the engaging protrusion 250 into the engaging hole 206 is always applied by the bias of the coil spring 23 in the connecting arm 25. Therefore, as in the first embodiment, the engagement protrusion 250 is not inadvertently detached from the engagement hole 206.

  In the arrangement of the connector 2 of the second embodiment, the connector 2r of the school desk 1a, the connector 2l of the school desk 1b, the connector 2l of the school desk 1c, and the connector 2r of the school desk 1d are: Do not connect. However, these connecting tools 2 can be used when the school desk 1 is further connected.

  Further, the connector 2 according to the second embodiment is not limited to that provided at the center of each side of the lower surface 100 of the top board 10 of the school desk 1. For example, by increasing the engagement holes of the connector according to the second embodiment, as in the first embodiment, the connector 2 is provided at the four corners of the lower surface 100 of the top plate 10 of the school desk 1 to be connected. The mutual relationship can be the same as that of the first embodiment. On the other hand, the arrangement of the coupler 2 disclosed in the second embodiment is excellent in that the number of couplers 2 to be used can be reduced because it is arranged in a total of three directions on the left and right and the front. Further, since the connecting tool 2 is not arranged at the center of the block, it is excellent in that the connecting / disconnecting operation can be easily performed only by inserting a hand without operating under the school desk 1. In addition, arrangement | positioning of the coupling tool 2 disclosed in this Example 2 can also be performed using the coupling tool which concerns on Example 1. FIG.

  The spring used in the present invention is not limited to the torsion coil spring 22 shown in the first embodiment and the coil spring 23 shown in the second embodiment. For example, various known springs such as a leaf spring can be used. In the first embodiment, the torsion coil spring 22 is used so that the connecting shaft passes through the coil of the torsion coil spring 22, thereby preventing the spring from inadvertently falling off the knob 254. .

  In Example 1, although the board | substrate 20 of the connector 2 was made into the L-shaped outline, this invention is not limited to this. For example, as shown in FIG. In addition, when it is set as an L-shaped outline, the attachment area of the board | substrate 20 with respect to the top plate 10 can be reduced very much, and it can attach with respect to more existing school desks 1 as a compact. In addition, since the material used is reduced, it can be manufactured at a lower cost.

  Further, although the material of the substrate 20 is made of metal in the first embodiment, it can be made of various synthetic resins.

It is explanatory drawing of the state which operated the (a) front view of the coupling tool which concerns on Example 1 of this invention, and (b) the pick part. It is a bottom view of the coupler concerning Example 1 of the present invention. It is a perspective view which shows the school desk made into the assembly state by the connection structure of the school desk which concerns on Example 1 of this invention. It is a bottom view which shows the group state which abbreviate | omitted the leg part of the school desk which concerns on Example 1 of this invention. It is a front view which shows the connection structure of the connection metal fittings of the school desk which concerns on Example 1 of this invention. It is a partially expanded bottom view of the group state of the school desk which concerns on Example 1 of this invention. It is the (a) front view of the coupling tool which concerns on Example 2 of this invention, (b) It is the front view made into the partial cross section. It is an enlarged bottom view of the coupler concerning Example 2 of the present invention. It is a perspective view which shows the school desk made into the group state by the connection structure of the school desk which concerns on Example 2 of this invention. It is a bottom view which shows the group state which abbreviate | omitted the leg part of the school desk which concerns on Example 2 of this invention. It is a front view which shows the connection structure of the connection metal fittings of the school desk which concerns on Example 2 of this invention. It is a partially expanded bottom view of the group state of the school desk which concerns on Example 2 of this invention. It is a bottom view of the coupler concerning other examples of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 School desk 1a School desk 1b School desk 1c School desk 1d School desk 10 Top plate 100 Lower surface 11 Leg part 12 Storage part 2 Connection tool 2lf Connection tool (Example 1)
2rf connector (Example 1)
2lb connector (Example 1)
2rb connector (Example 1)
2f connector (Example 2)
2r connector (Example 2)
2l connector (Example 2)
20 Substrate 200 Upper plate 201 Lower plate 202 Spacer 204 Mounting hole 205 Relief hole 206 Engaging hole 207 Standing wall 208 Positioning hole 21 Connection shaft 210 Bolt head 211 Double nut 22 Torsion coil spring 23 Coil spring 25 Connection arm 250 Engagement protrusion 250a Hook 251 Positioning pin 252 Tip member 252a Tip knob protrusion 253 Base member 253a Base knob protrusion 254 Knob 26 Rotating shaft 260 Hook

Claims (9)

Connection of a school desk, wherein the connecting means of the connecting side desk with respect to the connected side desk includes a board, a turning shaft attached to the board, and a connecting arm that turns horizontally about the turning axis. In structure
The connecting arm of the connecting side desk is provided with an engaging projection and a spring biasing means, the connected side desk is provided with an engaging hole, and the engaging projection is locked to the engaging hole by the spring biasing means. The coupling arm is biased in the direction, and the engagement projection can be secured against the spring biasing means during rotation so that the engagement projection does not interfere with other objects. In the coupled state, the engagement projection and the engagement hole are engaged. A school desk connection structure characterized in that the school desks are connected to each other. Of the connection means between the connection side desk and the connected side desk, the connection means of the connection side desk is a connection that rotates horizontally around the rotation axis attached to the substrate, the rotation axis attached to the substrate, and the rotation axis. In the connection structure of school desks with arms,
The connecting arm of the connecting side desk connects the base end member and the tip end member with a connecting shaft, forms a knob on both the base end member and the tip end member, and the base end member and the tip end member are relatively A spring urging means is provided in the opening direction, and the tip member is provided with an engagement protrusion that can be engaged with an engagement hole of a connected side desk described later,
The connected side desk includes a board having an engagement hole,
The rotating operation can hold the knob and maintain the state where the engaging protrusion of the tip member does not interfere with other objects, and engage the engaging protrusion of the tip member with the engaging hole of the board of the connected side desk. A connection structure for a school desk, characterized in that Connection of a school desk, wherein the connecting means of the connecting side desk with respect to the connected side desk includes a board, a turning shaft attached to the board, and a connecting arm that turns horizontally about the turning axis. In structure
The connecting arm of the connecting side desk includes an engaging protrusion, a positioning pin, and a rotating shaft, the rotating shaft passes through the substrate, and a spring that biases against the rising of the rotating shaft is disposed. With positioning holes corresponding to the positioning pins of the connecting arm,
The connected side desk includes a board having an engagement hole,
The connecting arm can secure a state in which the engaging protrusion does not interfere with other objects against the spring biasing means when rotating, and in the connected state, the engaging protrusion and the engaging hole engage with each other so that the school desks can be connected to each other. A school desk connection structure characterized in that it is configured to be connected.   The school desk connection structure according to claim 1, 2 or 3, wherein each school desk to be connected serves as both a connection side desk and a connected side desk. The connecting means of the connecting side desk or the connected side desk includes a board having an L-shaped profile in bottom view in which the angle between the two sides is substantially a right angle, a connecting arm on one side of the board, and the other side of the board Has an engagement hole,
The connection arm provided on one side of the substrate is a connection means for the engagement hole of the other connected side desk,
3. The school desk connection structure according to claim 2, wherein the engagement hole provided on the other side of the board corresponds to a connection arm of another connection side desk.   A connecting arm having a board having an L-shaped profile in bottom view with two sides sandwiched at substantially right angles, and an engaging projection for engaging with an engaging hole of another connected side desk on one side of the board And the other side of the board is provided with an engaging hole for engaging with an engaging projection formed on a connecting arm of another connecting side desk.   A connecting arm having a board having an L-shaped profile in bottom view with two sides sandwiched at substantially right angles, and an engaging projection for engaging with an engaging hole of another connected side desk on one side of the board The other side of the board is provided with connecting tools provided with engaging holes for engaging with engaging protrusions formed on the connecting arm of the other connecting side desk at the four corners of the top plate. Characteristic school desk. A substrate having a standing wall formed on the periphery of the lower plate, and a connecting arm attached to the substrate in a state of being rotatable in a horizontal direction with a rotation shaft;
The connecting arm forms an engaging projection and a positioning pin for positioning horizontal rotation at a position where it does not interfere with the substrate, and a spring that biases the rotary shaft against rising is disposed.
The board includes a mounting means for a lower surface of the top board, a positioning hole corresponding to the positioning pin, and an engaging hole corresponding to an engaging protrusion of another connecting tool. Ingredients. A substrate having a standing wall formed on the periphery of the lower plate, and a connecting arm that is attached to the substrate in a state of being pivotable in a horizontal direction with a pivot shaft, the connecting arm being in a position that does not interfere with the substrate. An engaging projection and a positioning pin for positioning horizontal rotation are formed, and a spring for biasing against the ascent of the rotating shaft is disposed, and the substrate is attached to the lower surface of the top plate A school desk comprising means, a positioning hole corresponding to the positioning pin, and an engaging hole corresponding to an engaging projection of another connecting tool provided on the lower surface of the top board.

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