JP2020065612A - Embroidery frame - Google Patents

Abstract

To provide an embroidery frame which can easily adjust a tightening pressure by confirming propriety of the tightening pressure when pinching an object to be sewn between an inner frame and an outer frame of the embroidery frame.SOLUTION: An embroidery frame includes: a frame-like inner frame; an outer frame having a first end part and a second end part opposing to each other at opposing surfaces, and for pinching the object to be sewn from the outside of the inner frame; and a tightening unit for adjusting an interval between the first end part and the second end part. The tightening unit includes: a communication shaft in which the direction where the interval between the first end part and the second end part changes is the axial direction; an operation member connected to the communication shaft, and for adjusting the interval between the first end part and the second end part by pressing with respect to the first end part or the second end part; an elastic body expanding/contracting in the axial direction of the communication shaft by the pressing by the operation member, and for pressing the first end part to the second end part side; and a pressure grasp member for grasping compression length of the elastic body by the pressing of the operation member.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an embroidery frame to be attached to a sewing machine having an embroidery function, and more particularly to an embroidery frame in which a tightening pressure can be easily adjusted when a sewing object is sandwiched between an inner frame and an outer frame of the hoop. is there.

  Conventionally, it has an outer frame formed so that both ends thereof face each other, and an inner frame formed so that it can be fitted inside the outer frame. In an embroidery frame that is sandwiched and held between frames, the end of the outer frame can be moved between a position where the object to be sewn together with the inner frame is held and a position where the outer frame is released. An operation member provided so as to be capable of operating, and an interval adjusting member for adjusting an interval between both ends of the outer frame in a state in which a workpiece is sandwiched and held by the outer frame and the inner frame by operating the operation member. An embroidery frame device for a sewing machine is known, which is provided with a space adjusting member and is capable of adjusting the end interval of the outer frame according to the thickness of the sewing object (see Patent Document 1).

However, in the hoop frame device described in Patent Document 1, it is not possible to confirm whether or not the tightening pressure for clamping the sewing object is appropriate when the sewing object is clamped between the outer frame and the inner frame. .
For this problem, an outer frame having divided sides so that the inner area can be freely changed, an inner frame for fixing a work cloth to the outer frame, and an outer frame attached to the divided sides, With a tightening screw that can adjust the tightening amount of the work cloth and a tightening scale that allows the tightening screw to be adjusted to the tightening position according to the cloth thickness of the work cloth, by aligning the lower end of the tightening screw with the tightening scale, There is known an embroidery frame that can be appropriately tensioned according to the thickness of the work cloth (see Patent Document 2).

  Further, with respect to the above problems, an outer frame, an inner frame that is fitted into the outer frame and can sandwich a work cloth between the outer frame, and for fastening the outer frame to the inner frame In an embroidery frame having a tightening mechanism, the processing which is provided on the hoop and acts between the inner peripheral surface of the outer frame and the outer peripheral surface of the inner frame by tightening the outer frame by the tightening mechanism. There is also known an embroidery frame which is provided with a pressure detector for detecting the pressure for holding the cloth and allows the user to easily determine whether the pressure for holding the work cloth is appropriate or not (see Patent Document 3).

JP 2008-279184 A Japanese Utility Model Publication No. 7-15793 JP, 2005-62560, A

However, in the hoop described in Patent Document 2, although the distance between the divided sides can be adjusted according to the thickness of the work cloth used, the physical characteristics (stretchability, etc.) of the work cloth are taken into consideration. Therefore, depending on the physical characteristics of the work cloth, the thickness of the work cloth may not correspond appropriately to the thickness of the tightening scale, or even if unexpected pressure is applied to the cloth, the situation will not change. There was a problem that I could not confirm.
Further, the embroidery frame described in Patent Document 3 has a problem in that it is upsized and costly due to wiring of the pressure detector.

  The present invention has an object to solve the above-mentioned problems, and the tightening pressure can be easily adjusted by confirming whether the tightening pressure is appropriate when sandwiching the sewing object between the inner frame and the outer frame of the hoop. The purpose is to provide a possible hoop.

  In order to solve the above problems, the present invention has, as an embroidery frame, a frame-shaped inner frame, and a first end portion and a second end portion that face each other on opposite sides, and from the outside of the inner frame. An embroidery frame including an outer frame that holds a sewing object and a tightening unit that adjusts a distance between the first end portion and the second end portion, the tightening unit including the first end portion and the second end portion. A communication shaft whose axial direction is a direction in which the distance from the end changes, and a communication shaft, which is connected to the communication shaft and presses against the first end or the second end to cause the first end and the second end to contact each other. By an operation member for adjusting the interval of, an elastic body that expands and contracts in the axial direction of the communication shaft by pressing by the operation member, and presses the first end portion toward the second end portion side, and by an operation member pressing force. And a pressure grasping member for grasping the compressed length of the elastic body. To.

  As an embroidery hoop embodiment of the present invention, the operating member is arranged on the side opposite to the facing surface of the first end of the communication shaft. A first vertical axis orthogonal to the communication axis is provided on one end side, the operating member has cam surfaces at different distances from the axial center of the first vertical axis, and the operating member is the first A configuration is adopted in which the elastic body is pressed by rotating about the vertical axis.

  As a specific embodiment of the hoop of the present invention, the operating member has an operating screw portion that is screwed into the communicating shaft, and the operating member has the operating screw portion along the axial direction of the communicating shaft. A configuration is adopted in which the elastic body is pressed by moving, and the communication shaft has a second vertical axis orthogonal to the communication shaft on the second end side, It further comprises a thickness adjusting portion having cam surfaces at different distances from the axis center of the vertical axis and pressing the second end portion toward the first end portion by rotating around the second vertical axis. In addition, the first end portion has a first through hole through which the communication shaft is inserted, and a housing recess for housing the elastic body, and the second end portion is The pressure grasping member has a second through hole through which the communication shaft is inserted. The configuration is characterized in that it is arranged between the elastic body and the operating member, and the first end portion has a position confirmation portion for confirming the position of the pressure grasping member. The pressure grasping member has a discriminating notation for discriminating whether or not the pressure of the elastic body is appropriate via the position confirming unit.

  The embroidery hoop of the present invention is connected to the communication shaft whose axial direction is the direction in which the distance between the first end and the second end of the outer frame changes, and the first end or the second end. An operating member that adjusts a distance between the first end portion and the second end portion by pressing the end portion, and an operation member that expands and contracts in the axial direction of the communication shaft by pressing the operating member to move the first end portion to the first end portion. It is possible to confirm whether or not the tightening pressure is appropriate by providing an elastic body that is pressed toward the two ends and a pressure grasping member that grasps the compression length of the elastic body due to the pressing of the operation member. The sewn object can be clamped between the frame and the outer frame by an appropriate tightening pressure.

  Also, in the hoop of the present invention, the communication shaft has a second vertical axis on the second end side that is orthogonal to the communication shaft, and has a cam surface at a different distance from the axial center of the second vertical axis. Then, by further including a thickness adjusting portion that presses the second end portion toward the first end portion by rotating about the second vertical axis, it is sandwiched between the inner frame and the outer frame. The tightening pressure can be appropriately adjusted according to the thickness of the material to be sewn.

It is the whole perspective view showing the appearance of the hoop according to the embodiment of the present invention. It is a figure which shows the principal part of the outer frame of the hoop which concerns on the Example of this invention, (a) is a top view and (b) is a perspective view. It is an expansion perspective view which shows the tightening unit of FIG. FIG. 3 is an exploded perspective view showing the embroidery frame tightening unit according to the embodiment of the present invention. It is a top view which shows the fastening unit of the hoop which concerns on the Example of this invention. It is a figure which shows the cloth thickness adjustment cam of the hoop which concerns on the Example of this invention, (a) is explanatory drawing of a cam surface, (b) is a top view. It is a schematic diagram explaining the adjustment principle of the tightening pressure by the cloth thickness adjustment cam of the hoop which concerns on the Example of this invention, (a) is a schematic diagram in the case of a "thin thing", (b) is a "thick thing" It is a schematic diagram in a case. It is a figure which shows the detection mechanism of the clamping pressure of the hoop which concerns on the Example of this invention, (a) is sectional drawing of a releasing state, (b) is sectional drawing of a clamping state. It is a side view which shows the discrimination | indication notation of the pressure grasping member of the hoop which concerns on the Example of this invention. It is a schematic diagram which shows the 1st confirmation method of the clamping pressure of the hoop which concerns on the Example of this invention. It is a schematic diagram which shows the 2nd confirmation method of the clamping pressure of the hoop which concerns on the Example of this invention. It is a schematic diagram which shows the 3rd confirmation method of the clamping pressure of the hoop which concerns on the Example of this invention.

Next, the hoop according to the embodiment of the present invention will be described with reference to the drawings shown in the examples.
In the following description, the vertical direction is “up / down”, the lower right to upper left direction is “front / back”, and the lower left to upper right direction is “left / right” as viewed in the perspective view of FIG. 1.

  In FIG. 1, A is an embroidery frame used when sewing an embroidery pattern using an embroidery sewing machine such as a sewing machine with an embroidery function or an automatic embroidery machine. An outer frame C having a first end C1 and a second end C2 facing each other and sandwiching a cloth F which is a sewing object from the outside of the inner frame B, the first end C1 and the second end C2. The tightening unit D that adjusts the distance S from the end C2 is provided.

The inner frame B is formed in a rectangular shape such as a substantially rectangular shape or a substantially square shape in plan view, and includes an inner frame body 1 having four sides formed in an outer shape capable of holding the cloth F.
The shape of the inner frame body 1 is not limited to the rectangular shape, and may be a circular shape or an elliptical shape.

The outer frame C corresponds to the outer shape of the inner frame body 1 of the inner frame B, and has a front side 10a, a left side 10b, and a rear side 10c formed in an inner shape capable of holding the cloth F with the inner frame body 1. , An outer frame body 10 composed of four sides of the right side 10d, and a mounting portion E projecting rearward from a rear side 10c of the outer frame body 10.
The mounting portion E is detachably attached to a moving body (not shown) of the embroidery sewing machine which moves in the XY directions in synchronization with the vertically moving needle of the sewing machine main body.
Further, ribs 11 for setting the lower position of the inner frame B are formed inward at the inner lower ends of the front side 10a, the left side 10b, the rear side 10c, and the right side 10d of the outer frame body 10, respectively. ing.

As shown in FIG. 2, the outer frame C is separated into a first end C1 and a second end C2 at the center of the front side 10a of the outer frame 10, and the first end C1 and the second end C2 are separated. A first block 12 and a second block 13 that project forward are formed in each of these.
The first block 12 has a first facing surface 12 a facing the second block 13, and a first opposite surface 12 b opposite to the first facing surface 12 a, and the second block 13 has the first block 12. And a second opposite surface 13a opposite to the second opposite surface 13a and a second opposite surface 13b opposite to the second opposite surface 13a.

As shown in FIG. 2, the second block 13 is formed with the guide convex portion 14 on the second opposite surface 13b, and the first block 12 and the second block 13 have the front side 10a of the outer frame body 10a. A first through hole 15 penetrating from the first opposite surface 12b to the first opposing surface 12a and a second through hole 16 penetrating from the second opposing surface 13b to the second opposing surface 13a are formed in parallel with the longitudinal direction. ing.
Further, in the first block 12, the accommodation recess 17 is formed from the first opposite surface 12b along the first through hole 15, and the observation window 18 which is a position confirmation portion is formed in the direction orthogonal to the accommodation recess 17. Has been done.

  As shown in FIGS. 3 and 4, the tightening unit D penetrates the first through hole 15 of the first block 12 and the second through hole 16 of the second block 13 and is connected to the first end portion C1 of the outer frame C. The communication shaft 20 whose axial direction is the direction in which the distance from the second end C2 changes, and the communication shaft 20, are connected to the communication shaft 20, and the first end C1 is pressed by pressing the first opposite surface 12b of the first block 12. And an operating lever 22 which is an operating member for adjusting a distance S between the second end portion C2 and the second end portion C2, and the first end portion C1 is extended and contracted in the axial direction around the communication shaft 20 by being pressed by the operating lever 22. In order to press the second end portion C2 side, the detection length of the detection spring 21 which is an elastic body housed in the housing recess 17 of the first block 12 and the compression length of the detection spring 21 when the operation lever 22 is pressed is calculated. The pressure grasping member 23 to grasp and the front A cloth thickness adjusting cam that is a thickness adjusting unit that is connected to the communication shaft 20 and that adjusts a distance S between the first end C1 and the second end C2 by pressing the second opposite surface 13b of the second block 13. 24 and.

As shown in FIG. 8, the pressure grasping member 23 includes a front end portion 23a that is inserted into the accommodation recess 17, and a flange portion 23b that extends outward from the rear end edge of the front end portion 23a. It is arranged between the detection spring 21 of 20 and the operation lever 22.
As shown in FIG. 4, at both ends of the communication shaft 20, a first screw portion 25 screwed on the first end C1 side and a second screw portion 26 screwed on the second end C2 side are provided. And are formed. A first vertical axis 27 that is screwed orthogonally to the communication shaft 20 is connected to the first screw portion 25, and a second vertical portion that is screwed orthogonally to the communication shaft 20 is connected to the second screw portion 26. The shaft 28 is connected. Further, the first vertical axis 27 and the second vertical axis 28 are connected so as to be parallel to each other.

As shown in FIG. 5, the operation lever 22 is rotatably attached to the first vertical axis 27, and the cloth thickness adjusting cam 24 is rotatably attached to the second vertical axis 28. .
The operation lever 22 has a lever portion 22a on which a finger is put to rotate about the first vertical axis 27, and an operation cam surface 30 at a different distance from the axis center of the first vertical axis 27.
Further, as shown in FIG. 6A, when the cloth thickness adjusting cam 24 rotates about the second vertical axis 28, the cloth thickness adjusting cam 24 changes from the axial center of the second vertical axis 28 to different distances A to D. By doing so, the adjustment cam surface 31 corresponding to the cloth thickness of the cloth F is provided.
Further, as shown in FIG. 4, the cloth thickness adjusting cam 24 has a guide concave portion 32 that is slidable along the guide convex portion 14 formed on the second opposite surface 13b of the second block 13.

Next, the usage mode and operational effects of this embodiment will be described.
First, in order to attach the cloth F to the embroidery frame A of the present embodiment, the operating lever 22 is brought into the state shown in FIGS. 1, 3 and 5, whereby the first end portion C1 and the second end portion of the outer frame C are The distance S from C2 is widened.
In this state, the cloth F stretched on the lower surface of the inner frame body 1 is inserted into the outer frame body 10 from above the outer frame C while the cloth F is stretched on the inner frame body 1 of the inner frame B. Push it down until it abuts the rib 11 of the outer frame 10.

  After that, in order to adjust the tightening pressure of the outer frame C according to the cloth thickness of the cloth F to be used, "thin object", "medium" indicated on the upper surface of the cloth thickness adjusting cam 24 as shown in FIG. 6B. The adjusting cam surface 31 of the cloth thickness adjusting cam 24 is selected according to "thick material" and "thick material", and the second adjusting cam surface 31 is brought into contact with the second opposite surface 13b of the second block 13 in the second When the cloth thickness adjusting cam 24 is rotated about the vertical axis 28, the selected adjusting cam surface 31 contacts the second opposite surface 13b of the second block 13, and the first end C1 and the second end C2. The tightening pressure of the outer frame C can be adjusted by adjusting the interval S between the and.

  Next, when the lever portion 22a of the operation lever 22 is rotated about the first vertical axis 27 toward the outer frame body 10, the operation cam surface 30 formed on the operation lever 22 is moved to the first block 12 of the first block 12. By pressing the pressure grasping member 23 protruding from the opposite surface 12b, the first block 12 is pressed via the detection spring 21, and the distance S between the first end C1 and the second end C2 of the outer frame C is reduced. The cloth F sandwiched between the inner side of the outer frame C and the outer side of the inner frame B can be tightened and tightened.

Here, the principle of adjusting the tightening pressure of the outer frame C by the cloth thickness adjusting cam 24 according to the cloth thickness will be described.
As shown in FIG. 6A, the adjustment cam surface 31 of the cloth thickness adjusting cam 24 becomes longer in the order of A to D from the axial center of the second vertical axis 28. When the adjustment cam 24 is rotated and, for example, “thin material” is selected as the adjustment cam surface 31 according to the cloth thickness, when the outer frame C is tightened by the operation lever 22, as shown in FIG. The gap S between the first end C1 and the second end C2 becomes smaller, and the gap between the inner frame B and the outer frame C that sandwich the cloth F also becomes smaller.
On the other hand, when "thick material" is selected as the adjustment cam surface 31 according to the cloth thickness, when the outer frame C is tightened by the operation lever 22, as shown in FIG. The distance S between C1 and the second end portion C2 is larger than when it is a “thin object”, and the gap between the inner frame B and the outer frame C that holds the cloth F is also increased, changing the tightening amount of the cloth F and The tightening pressure of the frame C can be adjusted.

However, even if the tightening pressure of the outer frame C is adjusted according to the cloth thickness by the cloth thickness adjusting cam 24, it is not possible to easily confirm whether the actual tightening pressure is appropriate.
Therefore, in the present invention, the communication shaft 20 is provided as a tightening pressure detection mechanism either between the operation lever 22 and the first end C1 or between the cloth thickness adjusting cam 24 and the second end C2. By observing the pressure grasping member 23 that moves by contracting the detection spring 21 when tightened by the operation lever 22 between the detection spring 21 and the pressure grasping member 23 which are passed through the observation window 18, the tightening pressure is appropriate. You can check if there is.

In this embodiment, as a tightening pressure detection mechanism, as shown in FIG. 5, a structure in which a detection spring 21 and a pressure grasping member 23, which are passed through the communication shaft 20, are sandwiched between the operation lever 22 and the first block 12. It is adopted.
As shown in FIG. 8, when the lever portion 22a of the operation lever 22 is rotated in the direction of the arrow about the first vertical axis 27 toward the outer frame body 10, the operation cam surface 30 formed on the operation lever 22 is , The flange portion 23b of the pressure grasping member 23 protruding from the first opposite surface 12b of the first block 12, and the pressed pressure grasping member 23 is detected by the detection spring 21 accommodated in the accommodation recess 17 of the first block 12. When the tip 23a is pressed, the inside of the accommodation recess 17 is moved leftward in accordance with the tightening pressure of the outer frame C.

As shown in FIG. 9, the pressure grasping member 23 is provided with a mark n, which is a distinguishing notation, on the end face 23c or the side face 23d of the tip portion 23a, or by color-coding p (indicated by hatching), the first block. It is a member for confirming whether the pressure is appropriate when viewed through the observation window 18 formed in 12.
9 (E) and 9 (G), the portion surrounded by a thin dotted line shows the case where the end face 23c of the tip end portion 23a is used as a discrimination notation, and the member actually exists. I'm not.

Next, an example of a method of confirming the tightening pressure by the observation window 18 will be described.
As shown in FIG. 10, the first confirmation method is to mark scales m around the rectangular observation window 18 at regular intervals, and distinguish between the end face 23c and the side face 23d of the pressure grasping member 23 between the scales m. Check that the tightening pressure is appropriate by seeing the border between the mark n and the color code p.
In the second confirmation method, as shown in FIG. 11, a graduation m is attached to only one point around the rectangular observation window 18, and the position of the graduation m is between the marks n on the side surface 23d of the pressure grasping member 23. , Or between the color codes p to confirm that the tightening pressure is appropriate.

Further, the third confirmation method is, as shown in FIG. 12, a proper tightening pressure with a mark n attached to the end face 23c or the side face 23d of the pressure grasping member 23 visible from the circular observation window 18 or a change in the color code p. Confirm that there is.
The third confirmation method can be classified into five stages of patterns (A) to (E) as described below, depending on the appearance from the observation window 18.
Patterns (A), (C) and (E) show a state in which the tightening pressure is too low, a state in which the tightening pressure is proper and a state in which the tightening pressure is too high, and patterns (B) and (D) are appropriate. Since it may be in any state or may be in an inappropriate state, it can be set to either of them as needed.

As a result of confirmation of the tightening pressure by the observation window 18 and the pressure grasping member 23, when it is confirmed that the tightening pressure is too small, the cloth thickness adjusting cam 24 is moved to the second vertical direction as shown in FIG. 8B. The tightening pressure of the outer frame C can be increased by rotating the shaft 28 in the “thin object” direction.
On the contrary, when it is confirmed that the tightening pressure is excessive, the cloth thickness adjusting cam 24 is rotated in the “thickness” direction about the second vertical axis 28 to increase the tightening pressure of the outer frame C. Can be reduced.

In the present embodiment, as the operation member, the operation lever 22 having the operation cam surface 30 that rotates about the first vertical axis 27 and has a different distance from the axis center of the first vertical axis 27 is adopted. 1. The vertical axis 27 and the operating lever 22 are omitted, and the operating shaft has an operating screw portion that is screwed into the first screw portion 25 of the communication shaft 20, and the pressure is grasped by rotating the operating screw portion to move in the axial direction. A screw type operation member for pressing the member 23 may be adopted.
When the screw type operation member is adopted, the cloth thickness adjusting cam 24 may be omitted and the screw type operation member may be simply rotated so that the tightening pressure is confirmed to be proper while looking at the observation window 18. The tightening pressure of the outer frame C can be adjusted.
In the present embodiment, the operating members such as the operating lever 22 and the operating screw portion are arranged on the first end C1 side, but the operating members are arranged on the second end C2 side, The two ends C2 may be pressed. Even in this case, the pressure can be grasped from the compression length of the elastic body that is in contact with the first end C1.

  The embroidery frame of the present invention makes it possible to properly check the sewing object by confirming with the observation window and the pressure grasping member whether or not the tightening pressure when the sewing object is clamped between the inner frame and the outer frame is appropriate. Since it can be clamped by tightening pressure, it can be widely applied to embroidery sewing machines such as sewing machines with an embroidery function and automatic embroidery machines.

A Embroidery frame B Inner frame C Outer frame C1 First end part C2 Second end part D Tightening unit E Mounting part F Cloth (sewn material)
S interval m scale n mark (discrimination notation)
p Color coding (discrimination notation)
1 inner frame 10 outer frame 10a front side 10b left side 10c rear side 10d right side 11 rib 12 first block 12a first facing surface 12b first opposite surface 13 second block 13a second facing surface 13b second opposite surface 14 guide Convex portion 15 First through hole 16 Second through hole 17 Housing concave portion 18 Observation window (position confirmation portion)
20 Communication shaft 21 Detection spring (elastic body)
22 Operation lever (operation member)
22a lever part 23 pressure grasping member 23a tip part 23b flange part 23c end face 23d side face 24 cloth thickness adjusting cam (thickness adjusting part)
25 1st screw part 26 2nd screw part 27 1st vertical axis 28 2nd vertical axis 30 Operation cam surface 31 Adjustment cam surface 32 Guide recess

Claims (9)

An outer frame having a frame-shaped inner frame, a first end portion and a second end portion that face each other on opposite surfaces, and sandwiching a sewing object from the outside of the inner frame; and the first end portion. An embroidery frame including a tightening unit for adjusting a distance between the second end and
The tightening unit is connected to the communication shaft whose axial direction is the direction in which the distance between the first end portion and the second end portion changes, and is connected to the communication shaft, and presses against the first end portion or the second end portion. An operating member that adjusts a distance between the first end portion and the second end portion, and expands and contracts in the axial direction of the communication shaft by being pressed by the operating member to move the first end portion toward the second end portion side. An embroidery frame comprising: an elastic body that presses against the elastic member; and a pressure grasping member that grasps the compression length of the elastic body due to the pressing of the operating member.   The hoop according to claim 1, wherein the operating member is arranged on a side of the communication shaft opposite to a facing surface of the first end portion. The communication shaft has a first vertical axis on the first end side that is orthogonal to the communication shaft,
The operation member has cam surfaces at different distances from the axis center of the first vertical axis,
The hoop according to claim 1 or 2, wherein the operation member presses the elastic body by rotating about the first vertical axis. The operation member has an operation screw portion that is screwed into the communication shaft,
The hoop according to claim 1 or 2, wherein the operating member presses the elastic body by moving the operating screw portion along an axial direction of the communication shaft. The communication shaft has a second vertical axis on the second end side that is orthogonal to the communication shaft,
A thickness adjusting portion having cam surfaces at different distances from the axial center of the second vertical axis and pressing the second end portion toward the first end portion by rotating about the second vertical axis. The hoop according to any one of claims 1 to 4, further comprising: The first end portion has a first through hole through which the communication shaft is inserted, and a housing recess for housing the elastic body,
The hoop according to any one of claims 1 to 5, wherein the second end portion has a second through hole through which the communication shaft is inserted.   The hoop according to claim 6, wherein the pressure grasping member is arranged between the elastic body and the operating member.   The hoop according to any one of claims 1 to 7, wherein the first end portion has a position confirmation portion that confirms a position of the pressure grasping member.   9. The hoop according to claim 8, wherein the pressure grasping member has a discriminating notation for discriminating whether or not the pressure of the elastic body is appropriate through the position confirming section.

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