JP5936216B2 - Connection structure for connecting two curtain hanging bars in a panel curtain - Google Patents

Description

  The present invention relates to a panel-type curtain, and more particularly to a connection structure for connecting two curtain hanging bars in a panel-type curtain.

Conventionally, so-called panel curtains are used for light shielding of rooms, partitions, and partitions.
In the panel curtain, a panel curtain material is suspended from a curtain rail provided on a wall surface or the like, and usually a plurality of curtain materials are arranged in a line.
Recently, a panel curtain has been developed that has a simple structure, can be used with at least one curtain rail, and can be easily connected to a suspension bar for hanging the curtain (Patent Document 1).

Similarly, a panel curtain has been developed that has a relatively small number of parts and is easy to assemble when the hanging bar is connected (Patent Document 2).
In such a curtain, one hanging bar is rotated about 90 degrees and an operation of connecting to the other hanging bar is performed.
That is, in order to connect the two suspension bars, an operation of rotating the long suspension bar by about 90 degrees is necessary.
Therefore, although there is an advantage that the number of parts is small, there is another problem that when connecting the suspension bar, a sufficiently large space for rotating the suspension bar must be secured.

Registration No. 4928015 International Publication No. 2013-168418

The present invention has been made based on such a background.
That is, an object of the present invention is to provide a panel curtain that can be connected very easily without requiring the rotation of the suspension bar itself when connecting the suspension bars.

  The present inventor has intensively studied to solve the above-mentioned problem, and the connection of the suspension bars using independent small members (connection pieces) makes it unnecessary to rotate the suspension bars at all. The present invention has been completed based on this finding.

  That is, the present invention is (1) a connection structure for connecting two curtain suspension bars in a panel curtain, and includes a first curtain suspension bar 10 having a guide groove M1 in the longitudinal direction, A second curtain hanging bar 11 that is slidable in a state of being superimposed on one curtain hanging bar 10 and has a guide groove M2 in the longitudinal direction, and a connection stop attached to an end of the second curtain hanging bar 11 And a connecting piece A that can be attached to or detached from the connecting stopper 3 and can be attached to or detached from the second curtain hanging bar 11 by bayonet coupling. The connecting structure is slidable along the guide groove M1 of the lowering bar 10.

  That is, according to the present invention, (2) the connection stopper 3 of the first curtain suspension bar 10 is configured to rotate and fix the guide hole P1 for guiding the connection piece A and the guided connection piece. It exists in the connection structure of the said (1) description in which the fixing hole P2 is formed.

  That is, according to the present invention, (3) the connecting piece A comprises a knob A1, a barrel A2 that can be inserted into the fixing hole P2 via the guide hole P1, and a retaining slide foot A3. However, the guide hole P1 has a shape that can pass through the guide hole P1 but cannot pass through the guide hole P1 when rotated 90 degrees.

  That is, according to the present invention, (4) a step A4 is formed above the retaining slide foot A3, and the step A4 fits into the opening of the guide groove M2 of the second curtain hanging bar 11. In the connection structure described in (3) above.

  That is, according to the present invention, (5) the foot width of the retaining slide foot portion A3 is smaller than the opening width of the guide groove M1 of the first rail portion 1a, and the foot length of the retaining slide foot portion A3 is the first. The connection structure according to the above (3) is larger than the opening width of the guide groove M2 of the rail portion 1a.

  That is, the present invention resides in (6) the connection structure according to the above (1), wherein the first curtain suspension bar and the second curtain suspension bar are suspended from one curtain rail.

  That is, this invention exists in the connection structure of the said (1) description with which the stopper for a connection and the connection piece A are formed with the synthetic resin material (7).

  In addition, as long as the objective of this invention is met, the structure which combined suitably said (1)-(7) is also employable.

  A connection structure for connecting two curtain hanging bars in a panel curtain according to the present invention, wherein the first curtain hanging bar having a guide groove in the longitudinal direction is overlapped with the first curtain hanging bar. Second curtain suspension bar slidable in the state and having a guide groove in the longitudinal direction, a coupling stopper attached to an end of the second curtain suspension bar, and attachable to or removable from the coupling stopper And a connecting piece that can be attached to or detached from the second curtain hanging bar by bayonet coupling, and the connecting piece is slidable along the guide groove of the first curtain hanging bar. The curtain hanging bars can be easily connected with each other by rotating the handle, and the long curtain hanging bars themselves can be rotated greatly as before. It is not required, a wide space for its is not required.

  The connecting piece A consists of a knob A1 and a barrel A2 that can be inserted into the fixing hole P2 via the guide hole P1 and a slide foot A3 for retaining, and the barrel A2 can pass through the guide hole P1 but rotates 90 degrees. In such a state, since it has a shape that cannot pass through the guide hole P1, the curtain hanging bars can be easily connected to each other by performing two simple operations of sliding and rotating the connecting piece A.

FIG. 1A is a schematic top view showing a state in which the panel curtain according to the present embodiment is developed, and FIG. 1B is a schematic top view showing a state in which the panel curtain according to the present embodiment is stored. FIG. FIG. 2 is a partial perspective view showing an example of the panel curtain according to the present embodiment. FIG. 3A is a front side view showing a first curtain hanging bar of the panel curtain according to the present embodiment, FIG. 3B is a back side view, and FIG. It is sectional drawing cut | disconnected by the AA of 3 (A). FIG. 4A is a front side view showing a second curtain hanging bar of the panel curtain according to this embodiment, and FIG. 4B is a back side view. FIG. 5 shows the connection stopper 3 attached to the second curtain hanging bar 11, FIG. 5 (A) is a perspective view, and FIG. 5 (B) is a plan view. 6 shows the connecting piece A, FIG. 6 (A) is a perspective view, and FIG. 6 (B) is a plan view. 7A and 7B are plan views for explaining a series of connection operations. FIG. 7A shows a state before connection, FIG. 7B shows a state where they are stacked in a straight line, and FIG. FIG. 7D shows a state where the foot is inserted into the guide groove, and FIG. 7D shows a state where the knob is rotated 90 degrees. 8A and 8B are perspective views for explaining a connecting operation between the connecting stopper and the connecting piece. FIG. 8A is a state in which the connecting stopper and the connecting piece are separated from each other, and FIG. FIG. 8C shows a state where the connecting piece is inserted into the hole, and FIG. 8C shows a state where the connecting piece is rotated 90 degrees. FIG. 9 shows a view of FIG. 8C viewed from the back side.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings as necessary.
In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.
Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified.
Further, the dimensional ratios in the drawings are not limited to the illustrated ratios.

The present invention resides in a connection structure for connecting two curtain hanging bars.
The whole panel type curtain using this connection structure is demonstrated in FIG.
FIG. 1A is a schematic top view showing a state in which the panel curtain according to the present embodiment is developed, and FIG. 1B is a schematic top view showing a state in which the panel curtain according to the present embodiment is stored. It is.
For convenience, the connecting piece A shows a pre-rotation state (state shown in FIG. 7C).

  The panel curtain 100 only needs to include at least a first curtain hanging bar 10 and a second curtain hanging bar 11, a third curtain hanging bar 12, and a fourth curtain hanging bar. In addition, by sequentially connecting the curtain hanging bars, a panel curtain having a large number of panels can be obtained.

FIG. 2 is a partial perspective view showing an example of the panel curtain according to the present embodiment.
The curtain material is not shown.
As shown in FIG. 2, in the panel curtain 100 according to the present embodiment, the second curtain hanging bar 11 is superposed on the first curtain hanging bar 10 (that is, in a state along the same). It can slide.
Similarly, the third curtain suspension bar 12 (not shown) can also slide with respect to the second curtain suspension bar.

  Therefore, as shown in FIG. 1A, the panel-type curtain 100 can be in an unfolded state in which a plurality (three in the figure) of curtain materials are arranged in a line and stretched. As shown in B), a plurality of curtain materials can be arranged so as to overlap with each other to be shortened.

  Returning to FIG. 1A, in the panel curtain 100, the front end portion 10a of the first curtain hanging bar 10, the intermediate portion 11c of the second curtain hanging bar 11, and the rear end portion of the second curtain hanging bar 12. Each of the holes 12a is formed with a hole 8a, and when suspended, a support 8 such as a hook member (see FIG. 2) is attached through the hole 8a.

The panel-type curtain 100 as shown in the figure has three parts for attaching three bodies of a first curtain hanging bar 10, a second curtain hanging bar 11 and a third curtain hanging bar 12 to one curtain rail 5. It will be suspended via a support tool.
In addition, each support fixture attached via each hole 8a is attached to the curtain rail 5 located upward via the runner 6 etc. which are not shown in figure.
Here, the position of the hole 8a is not limited to the exact front end portion, rear end portion, and intermediate portion, but may be any position that can balance the entire curtain when suspended.

The front end portion 11 a of the second curtain hanging bar 11 is supported by the first curtain hanging bar 10, and the front end portion 12 a of the third curtain hanging bar 12 is supported by the second curtain hanging bar 11.
As described above, in the panel curtain 100, the first curtain hanging bar 10, the second curtain hanging bar 11, and the third curtain hanging bar 12 are not provided with support at both ends, and one end is different. It is supported by the second curtain suspension bar to balance the whole.
Therefore, the number of supporting tools is reduced, and the number of parts as the panel curtain 100 can be reduced.
Of course, the number of support members 8 attached to the runner 6 is also reduced, so that the entire assembly is facilitated.
In addition, it is also possible to increase the number of the support tools 8 as appropriate.

3A is a front side view showing a first curtain hanging bar of the panel curtain according to the present embodiment, FIG. 3B is a back side view, and FIG. It is sectional drawing cut | disconnected by the AA line of FIG. 3 (A).
As shown in FIGS. 3A and 3C, the first curtain hanging bar 10 includes a rail portion (hereinafter referred to as “first rail portion” for convenience) 1a provided on the front side surface, and As shown in FIG. 3B, it has a support portion (hereinafter referred to as “first support portion”) 2a provided on the back side surface.
In addition, the 1st curtain material 9a is attached to this support part 2a so that it may mention later.

  In the panel curtain 100, since the first curtain hanging bar 10 has the first rail portion 1a on the front side, it is attached to the second curtain hanging bar 11 described later in the guide groove M1 of the first rail portion 1a. By fitting the connecting piece A, the second curtain hanging bar 11 can slide along the first curtain hanging bar 10 (that is, in a superposed state).

As will be described later, the retaining slide foot A3 provided in the connecting piece A is fitted into the guide groove M1 and slides.
In the first curtain hanging bar 10, the stoppers 7 are fitted and fixed at both ends.
These stoppers 7 prevent the slide foot A3 for retaining the connection piece A (not shown) of the second curtain hanging bar 11 from being detached from the first rail portion 1a.

Note that it is preferable that the stoppers 7 at both ends are securely fixed to the first curtain suspension bar 10 using screws N or the like.
In the panel curtain 100, since the first curtain hanging bar 10 has the first support portion 2a on the back side surface, a first curtain material 9a described later can be attached.

In addition, various things, such as a knitted fabric, a woven fabric, a braid, and paper, are employ | adopted as the 1st curtain material 9a.
Here, the 1st support part 2a consists of touch fasteners, for example.
That is, a touch fastener is attached to the back side surface of the first curtain hanging bar 10.
For this reason, it is possible to easily attach the first curtain material 9a by simply pressing the first curtain material 9a against the touch fastener.
In this case, it goes without saying that a portion (female or male touch fastener or the like) that can be attached and fixed to the touch fastener is provided on the upper portion of the first curtain material 9a.

The support 8 is hooked in the hole 8a of the front end portion 10a of the first curtain hanging bar 10 and the support 8 is attached to the runner 6 of the curtain rail 5, so that one end of the first curtain hanging bar 10 is a curtain. It is suspended from the rail 5.
The other end of the first curtain hanging bar 10 is supported by the second curtain hanging bar 11 as described above.

FIG. 4A is a front side view showing a second curtain hanging bar of the panel curtain according to this embodiment, and FIG. 4B is a back side view.
As shown in FIG. 4 (A), the second curtain hanging bar 11 includes a rail portion (hereinafter referred to as “second rail portion” for convenience) 1b provided on the front side surface, and FIG. 4 (B). As shown, it has a support portion 2b (hereinafter referred to as “second support portion” for convenience) provided on the back side surface.
And the stopper 7 is attached to the rear-end part 11b, and the connection stopper 3 which is a kind of stopper is provided in the front-end part 11a.

  Since the second curtain hanging bar 11 has the second support portion 2b made of a touch fastener on the back side surface, the second curtain material can be easily applied to the second support portion 2b in the same manner as the first curtain hanging bar 10 described above. It is possible to attach to.

  In the panel curtain 100, the first curtain hanging bar 10 has the first rail portion 1a (having the guide groove M1) on the front side surface, so that it is attached to the second curtain hanging bar 11 and integrated therewith. The connecting piece A is fitted into the connecting stopper 3 and the first curtain hanging bar 10 (specifically, in the guide groove M1 of the first rail portion 1a of the first curtain hanging bar 10) at the same time. Thus, the second curtain hanging bar 11 is slidably attached to the first curtain hanging bar 10 (see FIG. 7).

(Connecting stop)
FIG. 5 shows the connection stop 3 attached to the second curtain suspension bar 11.
The connection stopper 3 includes a first base portion 31 that is a portion attached to the second curtain hanging bar 11 and a second base portion 32 that is a portion attached to the connection piece A.
The second base portion 32 is a portion extending to the opposite side of the first base portion 31 and has a contact surface that contacts the end surface of the second curtain hanging bar 11.
The first base portion 31 is provided with a screw hole, and is securely fixed by using a separate screw N while being attached to the end portion of the two curtain hanging bar 11.

Further, the side surface of the first base portion 31 is provided with an elastic piece 31A. When the first base portion 31 is attached to the second curtain hanging bar 11, the elastic piece 31A is attached to the second curtain hanging bar 11 in the second shape. The wall of the guide groove M2 of the two rail portion 1b is pressed outward.
Therefore, the connecting stopper 3 (specifically, the first base 31 of the connecting stopper 3) can be elastically fitted to the second curtain hanging bar 11.
The second base 32 of the connection stopper 3 is formed with a guide hole P1 for guiding the connection piece A and a fixing hole P2 for rotating and fixing the guided connection piece A.
The fixing hole P2 is larger than the guide hole P1.
The guide hole P1 is opened to the outside, and the fixed hole P2 is formed so as to communicate with the guide hole P1.
That is, the fixed hole P2 is open through the guide hole P1.

(Connection piece)
On the other hand, the connecting piece A, which is a small component, has a body A2 (so-called constricted) that can be inserted into the fixing hole P2 through a knob A1 formed so as to be easily picked by a finger and a guide hole P1 of the stopper 3 for connection. ) And a slide foot A3 for retaining for fitting into the end of the second curtain hanging bar 11.
A step portion A4 is formed on the retaining slide foot portion A3.

6 shows the connecting piece A, FIG. 6 (A) is a perspective view, and FIG. 6 (B) is a plan view.
The knob A1 is formed in a plate shape having a constant thickness so that it can be easily picked, and is larger than the trunk A2, while the retaining slide foot A3 is also larger than the trunk A2.
The trunk A2 has an oval cross section.

The retaining slide foot A3 is preferably formed in a rectangular parallelepiped shape having a step A4, and the knob portion A1 and the retaining slide foot A3 preferably have the same direction.
This is because the knob A1 can be positioned at the same angular position as the retaining slide foot A3 when the knob A1 is picked and rotated.
Here, the body portion A2 can pass through the guide hole P1 formed in the second base portion 32 of the coupling stopper 3, but cannot enter the guide hole P1 in a state where it is inserted into the fixed hole P2 and rotated 90 degrees. Have

That is, since the cross section of the trunk A2 is oval, it can pass through the guide hole P1 and enter the fixing hole P2, and then can not be detached by rotating.
On the contrary, from the state where it cannot enter the fixing hole P2 and can not be detached, it can be rotated and passed through the guide hole P1 from the fixing hole P2 to be detached outside.
Further, the retaining slide foot A3 can be inserted into the guide groove M1 of the first rail portion 1a of the first curtain hanging bar 10 from the lateral direction, and then prevented from being detached by rotating.

The step A4 formed above the retaining slide foot A3 is fitted into the opening of the guide groove M1, so that the sliding operation of the retaining slide foot A3 can be smoothly performed without rattling.
Conversely, from a state where the first rail portion 1a cannot enter the guide groove M1 and cannot be detached, the first rail portion 1a can be rotated away from the guide groove M1.
Here, the foot width L1 of the retaining slide foot A3 is smaller than the opening width L3 of the guide groove M1 of the first rail portion 1a (L1 <L3), and the foot length L2 of the retaining slide foot A3 is the first. It is larger than the opening width L3 of the guide groove M2 of the 1 rail part 1a (L2> L3).
Further, the foot length L2 of the slide foot A3 for retaining is smaller than the groove width L4 of the guide groove M1.

(Concatenation operation)
FIG. 7 is a plan view for explaining a series of coupling operations (as viewed from the front side).
Now, it is assumed that the first curtain hanging bar 10 and the second curtain hanging bar 11 are connected from the state before the connection (see FIG. 7A).
The connecting stopper 3 described above is already attached and fixed to the end of the second curtain hanging bar 11.
In order to connect the first curtain suspension bar 10 and the second curtain suspension bar 11, first, the first curtain suspension bar 10 and the second curtain suspension bar 11 are aligned, and the first curtain suspension bar 10 is aligned. The second curtain hanging bar 11 is overlaid on (see FIG. 7B).

  In this state, the knob A1 of the connecting piece A is picked with a finger, and the body A2 is inserted into the guide hole P1 of the connecting stopper 3 so as to be slid from the lateral direction and inserted to the position of the fixing hole P2. (See FIG. 7C).

  In this state, the retaining slide foot A3 is parallel to the guide groove M1 of the second curtain hanging bar 11, so that the retaining slide foot A3 is inserted into the guide groove M1 of the first curtain hanging bar 10. (See FIG. 7C).

Next, the knob A1 is rotated 90 degrees. In this case, it may be rotated to either side.
Thus, in the state rotated 90 degree | times, trunk | drum A2 can no longer be removed from the guide hole P1 (refer FIG.7 (D)).

On the other hand, the retaining slide foot A3 is also in a state of 90 degrees with respect to the guide groove M1, and can no longer be detached.
Then, the stepped portion of the retaining slide foot A3 is also fitted into the opening of the guide groove M1.
As a result, the body A2 of the connecting piece A is fixed to the connecting stopper 3, and the slide foot A3 for retaining is inserted into the guide groove M1 of the first curtain suspension bar 10.

That is, the first curtain hanging bar 10 and the second curtain hanging bar 11 are in a straight line and overlapped and connected.
In this way, when the first curtain hanging bar 10 and the second curtain hanging bar 11 are connected, there is no need to pivot the long second curtain hanging bar 11 as in the conventional case, and the connecting piece A It is only necessary to use a simple operation, and both are easily connected.
In this connected state, the retaining slide foot A3 can freely slide in the length direction of the guide groove M1 of the first curtain hanging bar 10.
In this case, the step A4 formed on the retaining slide foot A3 is loosely fitted into the opening of the guide groove M1, thereby smoothly sliding the retaining slide foot A3. .

  FIG. 8 is a perspective view for explaining the coupling operation between the coupling stopper 3 and the coupling piece A, and the first curtain hanging bar 10 and the second curtain hanging bar 11 are illustrated for easy understanding. Omitted.

The connecting piece A is inserted into the fixing hole P2 of the connecting stopper 3 as shown in FIG. 8B from the state where the connecting stopper 3 and the connecting piece A are separated as shown in FIG. 8A.
When the connecting piece A is rotated 90 degrees as shown in FIG. 8C, the retaining slide leg A3 is also rotated 90 degrees in the same manner as the knob A1.

  FIG. 9 shows a view of the connecting piece A from the back side, and it can be seen that the retaining slide foot A3 is also rotated 90 degrees.

(Disconnect operation)
It is assumed that the first curtain hanging bar 10 and the second curtain hanging bar 11 are connected as described above.
To remove this, it is only necessary to pick the knob A1 of the connecting piece A and rotate it 90 degrees.
In this case, it does not matter which side is rotated.
In a state where the connecting piece A is rotated 90 degrees, the retaining slide leg A3 is parallel to the opening of the guide groove M1 of the second curtain hanging bar 11, and can be detached as it is.

On the other hand, the body part A2 can be separated from the outside by passing through the guide hole P1 of the connection stopper 3 by sliding in the lateral direction in a state of being rotated by 90 degrees.
That is, the connection stopper 3 and the connection piece A are separated.
As described above, the connecting piece A is simultaneously attached to both the connecting stopper 3 and the second curtain hanging bar 11 by the two continuous operations of “slide” and “rotation”. The connection piece A can be removed from both the connection stopper 3 and the second curtain suspension bar 11 simultaneously by two continuous movements of “movement” and “slide”.

In this way, the first curtain hanging bar 10 and the second curtain hanging bar 11 can be attached or detached freely via the connecting piece A, and the connecting piece A can be operated by a so-called one-touch continuous operation. Can be done very easily and quickly.
As in the prior art, the operation of pivoting the curtain hanging bar greatly is unnecessary, and no space is required for it, which is extremely convenient.
The connecting structure in which the connecting piece A is rotated by 90 degrees and the retaining slide foot A3 is attached to or detached from the guide groove M1 of the first curtain hanging bar 10 is referred to herein as a bayonet connecting structure.

  The preferred embodiment of the present invention has been described above, but the present invention is not limited to the above embodiment.

  For example, the panel curtain 100 according to the present embodiment includes a first curtain hanging bar 10, a second curtain hanging bar 11, and a third curtain hanging bar 12, and the number of curtain hanging bars is limited. Not.

  In the panel curtain 100 according to the present embodiment, the connection stopper 3 and the connection piece A are preferably formed of synthetic resin, but are not necessarily limited in this way.

  In the panel curtain 100 according to the present embodiment, the first support part 2a and the second support part 2b are made of touch fasteners, but other fixing means can also be adopted.

The panel curtain 100 according to the present invention is used for light shielding of a room, or for partitioning or partitioning.
When the suspension bars are connected to each other, the suspension bars themselves do not need to be rotated at all, and can be connected by a very simple operation of sliding and rotation using a connection piece.

1a ... 1st rail part (rail part)
1b ... 2nd rail part (rail part)
2a ... 1st support part (support part)
2b ... 2nd support part (support part)
DESCRIPTION OF SYMBOLS 3 ... Connecting stop 31 ... 1st base 31A ... Elastic piece 32 ... 2nd base 5 ... Curtain rail 6 ... Runner 7 ... Stopper 8 ... Support Tool 8a ... Hole 10 ... First curtain hanging bar 10a, 11a, 12a ... Front end 10b, 11b, 12b ... Rear end 11 ... Second curtain hanging bar 12 ....・ Third curtain hanging bar A ... Connecting piece A1 ... Picking part A2 ... Body part A3 ... Sliding foot part for retaining A4 ... Step part L1 ... Foot width L2 ... -Foot length L3 ... Opening width L4 ... Groove width K1 ... First curtain material (curtain material)
M1 ... Guide groove N ... Screw

Claims (7)

  A connecting structure for connecting two curtain hanging bars in a panel-type curtain, wherein the first curtain hanging bar has a guide groove in the longitudinal direction, and slides in a state of being superimposed on the first curtain hanging bar A second curtain suspension bar capable of having a guide groove in the longitudinal direction, a connection stopper attached to an end of the second curtain suspension bar, attachable to or removable from the connection stopper; and And a connecting piece that can be attached to or detached from the second curtain hanging bar by bayonet connection, and the connecting piece is slidable along the guide groove of the first curtain hanging bar. .   The connection stopper of the first curtain suspension bar is formed with a guide hole for guiding the connection piece and a fixing hole for rotating and fixing the guided connection piece. The connection structure according to 1.   The connecting piece consists of a knob portion and a trunk portion that can be inserted into the fixing hole via the guide hole and a slide foot portion for retaining, and the trunk portion can pass through the guide hole, but in a state where it is rotated 90 degrees, The connection structure according to claim 2, wherein the connection structure has a shape that cannot pass.   4. The connecting structure according to claim 3, wherein a step portion is formed above the retaining slide foot portion, and the step portion is fitted into the opening portion of the guide groove of the second curtain hanging bar.   The foot width of the retaining slide foot portion is smaller than the opening width of the guide rail of the first rail portion, and the foot length of the retaining slide foot portion is larger than the opening width of the guide groove of the first rail portion. The connection structure according to claim 3.   The connection structure according to claim 1, wherein the first curtain hanging bar and the second curtain hanging bar are suspended from one curtain rail.   2. The connecting structure according to claim 1, wherein the connecting stopper and the connecting piece are made of a synthetic resin material.

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