JP2019094987A - Roller and drawer device - Google Patents

Abstract

To provide a roller and a drawer device having the roller capable of integrating a roller body and a screw member without requiring high dimensional accuracy.SOLUTION: A roller comprises: a roller body 17 in which an elastic cylindrical part 21, having an anti-loosening projection 22 provided on the inner surface, is provided concentrically; and a screw member 18 provided with an engagement groove 27 on the outer peripheral surface of a bow 25 rotatably inserted into the cylindrical part 21 and in which the anti-loosening projection 22 is rotatably engaged. Accordingly, when inserting the bow 25 of the screw member 18 into the cylindrical part 21 of the roller body 17 and engaging the anti-loosening projection 22 in the cylindrical part 21 with an engagement groove part 27 of the bow 25, since the cylindrical part 21 can be elastically deformed, the anti-loosening projection 22 in the cylindrical part 21 can be easily and reliably engaged with the engagement groove part 27 of the head 25. Thus, the roller body and the screw member can be integrated without requiring high dimensional accuracy.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a roller used for an apparatus such as a register and a drawer apparatus provided with the same.

  For example, in a drawer device of a register, as described in Patent Document 1, in order to store the lead-out portion in the case so as to be able to be drawn out smoothly, the case guide rails and the case guide on both sides in the case There is known a structure in which a roller is provided and a drawing guide rail and a drawing guide roller are provided on the outer surfaces of both sides of the drawing portion.

Japanese Patent Application Laid-Open No. 2003-196740

  In the drawer device of this type, when sliding the lead-out portion in the housing, the lead-out guide rail of the lead-out portion moves on the housing guide roller of the housing, and the lead-out guide roller of the lead-out portion is the housing of the housing By moving while being in contact with the lower surface of the guide rail and rotating, the lead-out portion can be smoothly pulled out with respect to the housing.

  In such a drawer device, each roller of the drawing out guide roller of the drawing out portion and the case guide roller of the case comprises a roller body and a screw member, and the screw member is inserted into the shaft mounting hole of the roller body It is structured to be attached to either the lead-out portion or the housing.

  In this type of roller, the screw portion of the screw member is inserted and projected into the shaft mounting hole of the roller body in order to integrate the roller body and the screw member to reduce the number of parts and simplify the assembly operation. And a large diameter portion in which the head of the screw member is inserted and disposed, and the head of the screw member is rotatably fitted in the large diameter portion of the shaft mounting hole. .

  However, in such a roller, in order to rotatably fit the head of the screw member into the large diameter portion of the shaft attachment hole of the roller body, it is necessary to provide the large diameter portion with a retaining portion for preventing the head from coming off. There is. For this reason, in order to manufacture a securing part in this way, since high dimensional accuracy is required, there is a problem that manufacture is troublesome and a yield is bad.

  The problem to be solved by the present invention is to provide a roller which can achieve integration of a roller body and a screw member without requiring high dimensional accuracy, and a drawer device provided with the roller.

  According to the present invention, the retaining member is rotatably movable on the roller body provided with the elastic cylindrical portion having the retaining portion on the inner surface and the outer peripheral surface of the head rotatably inserted in the cylindrical portion. And a screw member provided with an engaging portion to be engaged.

  Further, the present invention is provided with a roller body provided with an elastic cylindrical portion provided with a retaining portion on its inner surface, and a screw member provided with a screw at one end of the head on the same axis. When the head is rotatably inserted into the cylindrical portion, the screw member engages with the engaging portion provided on the outer peripheral surface of the head so as to rotatably move the retaining portion. It is a roller to be characterized.

  According to the present invention, the roller body and the screw member can be integrated without requiring high dimensional accuracy.

It is the disassembled perspective view which showed one Embodiment of the drawer apparatus of the electronic register | resistor to which this invention is applied. FIG. 2 is an enlarged perspective view showing a drawer roller of the drawer device shown in FIG. 1; It is the expansion perspective view which disassembled and showed the drawing-out roller shown by FIG. The drawing-out roller shown by FIG. 2 is shown, (a) is the expansion front view which looked at the drawing-out roller from the front side, (b) is the enlargement which fractured and showed a part in AA arrow of (a). FIG. 6C is an enlarged back view of the drawing roller as viewed from the side opposite to the front side. The roller main body of the drawing-out roller shown by FIG. 4 is shown, (a) is the enlarged front view which looked at the roller main body from the front side, (b) fractures a part in BB arrow of (a) The enlarged side view shown, (c) is the enlarged back view which looked at the roller main body from the front and the opposite side. The screw member of the drawing-out roller shown by FIG. 4 is shown, (a) is the enlarged front view which looked at the screw member from the front side, (b) is the enlarged side view, (c) is a screw member opposite side to the front. It is the expansion reverse view seen from.

Hereinafter, one embodiment in which the present invention is applied to an electronic register will be described with reference to FIGS.
This electronic register is provided with a drawer device 1 as shown in FIG. The drawer device 1 includes a housing 2 and a lead-out portion 5, and the lead-out portion 5 is configured to be drawn out so as to be drawn inside the housing 2. The housing 2 is provided with a register main body (not shown) at the top, and is provided with a case main body 3 of synthetic resin and a cover case 4 made of metal.

  As shown in FIG. 1, the case main body 3 is formed in a substantially box shape with an open upper portion. That is, the case body 3 includes a bottom 3a, a front frame 3b, a back 3c, and side portions 3d on both sides. The front frame portion 3b and the back surface portion 3c are formed in a substantially rectangular shape having the same outer size, and the front frame portion 3b is provided with an opening 3e into which the lead-out portion 5 is inserted. The side portions 3d on both sides are formed lower in height than the front frame portion 3b and the back portion 3c.

  As shown in FIG. 1, the cover case 4 includes an upper surface cover portion 4a and side surface cover portions 4b on both sides. The upper surface cover portion 4 a is formed in a rectangular shape having the same size as the upper surface portion of the case main body 3, and is configured to be disposed on the upper surface portion of the case main body 3. The side cover parts 4b on both sides are formed in a rectangular shape having the same height as the heights of the front frame part 3b and the back part 3c of the case main body 3, and are arranged covering the side parts 3d on both sides of the case main body 3 Is configured as.

  As shown in FIG. 1, the drawer portion 5 is for storing money, and is formed in a substantially box shape whose upper portion is opened. In the lead-out portion 5, the length (depth) in the lead-out direction is shorter than the length in the lead-out direction of the case body 3, and the length in the width direction orthogonal to the lead-out direction is the opening of the front frame portion 3b of the case body 3. It is formed in the length substantially the same as the length of the cross direction in part 3e.

  Further, as shown in FIG. 1, the lead-out portion 5 has an outer shape of the front surface portion 5a substantially the same size as an outer shape of the front frame portion 3b of the case main body 3, and is larger than the shape of the opening 3e of the front It is formed large. Thereby, the lead-out portion 5 is inserted into the housing 2 from the opening 3e in the front frame portion 3b of the case main body 3, and the front portion 5a abuts on the front frame portion 3b and the rear portion of the lead-out portion 5 is the case main body 3 It is comprised so that it may be accommodated in the housing | casing 2 in the state separated from the back surface part 3c.

  As shown in FIG. 1, a coin storage unit 6 and a bill storage unit 7 are provided inside the drawer unit 5. The coin storage unit 6 stores coins for each type, is provided on the front side of the drawer unit 5, and the inside thereof is divided into a plurality for each denomination. The bill storage unit 7 stores bills by type and is provided on the rear side of the drawer 5 and the inside thereof is divided into a plurality of pieces for each denomination. The bill storage unit 7 is provided with pressing portions 7a for pressing a bill into each of the plurality of partitions.

  Further, as shown in FIG. 1, a pair of roller attachment portions 8 are provided to project rearward at the rear end portion of the lead-out portion 5. That is, the pair of roller attachment portions 8 are provided on both sides of the rear end portion of the lead-out portion 5. Also in this case, when the drawer portion 5 is housed in the housing 2, the pair of roller attachment portions 8 are housed in the housing 2 without contacting the back surface portion 3 c of the case main body 3. Is configured. Further, on the front surface portion 5 a of the lead-out portion 5, a locking portion 10 is provided which locks the pull-out portion 5 accommodated in the housing 2.

  Further, as shown in FIG. 1, a lock device 11 is provided at the rear of the inside of the housing 2 for locking the drawer portion 5 housed in the housing 2. The lock device 11 includes a lock portion 11a for locking an engagement pin (not shown) provided at a rear end portion of the drawer portion 5, a lock release portion 11b for releasing the lock by the lock portion 11a, and a lock portion The coil spring 11c which pushes out the drawer part 5 by which the lock | rock by 11a was cancelled | released toward the exterior from the inside of the housing | casing 2 is provided.

  Thereby, as shown in FIG. 1, when the lead-out portion 5 is stored in the housing 2, the lock device 11 engages the engagement of the lead-out portion 5 in a state where the coil spring 11 c is compressed by the lead-out portion 5. The pin (not shown) is configured to be locked by the lock portion 11a. Further, when the lock release portion 11b releases the lock of the engagement pin of the pullout portion 5 by the lock portion 11a by the key operation of the register main body (not shown), the lock device 11 receives the spring force of the coil spring 11c. The drawing portion 5 is configured to be pushed out of the housing 2.

  By the way, as shown in FIG. 1, the drawer device 1 includes a guide mechanism 12 for smoothly sliding the drawer portion 5 with respect to the housing 2. The guide mechanism 12 includes a case guide rail 13 and a case roller 14 provided on both sides in the case 2, and a drawing guide rail 15 and a drawing roller 16 provided on both sides of the drawing portion 5. Have.

  As shown in FIG. 1, the housing guide rails 13 are provided on the inner surfaces of the side portions 3 d located on the left and right sides of the case main body 3 from the front side to the rear side. The housing rollers 14 are attached to the front sides of the inner surfaces of the side surfaces 3d on the left and right sides of the case main body 3, that is, on the rear portions located on the left and right sides of the front frame 3b. The lead-out guide rails 15 are provided on the left and right outer surfaces of the lead-out portion 5 so as to extend from the front to the rear roller attachment portion 8. The drawing rollers 16 are respectively attached to the roller attachment portions 8 at the rear end portion of the drawing portion 5.

  Thereby, as shown in FIG. 1, when the guide mechanism 12 pulls out the lead-out portion 5 with respect to the housing 2, the lead-out guide rail 15 of the lead-out portion 5 is placed on the case roller 14 of the case main body 3. While moving, the drawing-out roller 5 of the drawing-out portion 5 abuts on the lower surface of the case guide rail 13 of the case main body 3 and moves while rotating so that the drawing-out portion 5 can be drawn out smoothly to the case 2 It is configured.

  In this case, at least the pull-out roller 16 of the housing roller 14 and the pull-out roller 16 is provided with a roller body 17 and a screw member 18 as shown in FIGS. 2 and 3. The roller body 17 is formed of a synthetic resin such as polyacetal (POM), polypropylene (PP), polyethylene (PE) or the like. The roller main body 17 includes a cylindrical roller portion 20 and a cylindrical portion 21 provided concentrically with the roller portion 20.

  In this case, as shown in FIGS. 2 to 5, the roller portion 20 is formed such that the inner diameter is sufficiently larger than the outer diameter of the cylindrical portion 21. As shown in FIGS. 4B and 5B, a side wall 20a is provided at one axial end (left end in FIG. 4B) of the roller portion 20. As shown in FIG. Thus, the cylindrical portion 21 is integrally formed with the side wall 20 a of the roller portion 20 at one end side in the axial direction (left end side in FIG. 4B).

  As shown in FIGS. 3 and 5, a plurality of retaining projections 22 are provided on the inner peripheral surface of the cylindrical portion 21. As shown in FIGS. 5 (a) to 5 (c), the plurality of retaining projections 22 are a plurality of locations on the same circumference on the inner circumferential surface of the cylindrical portion 21, for example, 3 locations at an angular interval of 120 degrees. Are provided in a hemispherical shape.

  In this case, as shown in FIGS. 2 to 5, a plurality of cut-out portions 23 are provided by a plurality of partition ribs 24 between the inner peripheral surface of the roller portion 20 and the outer peripheral surface of the cylindrical portion 21. The plurality of hollow portions 23 are provided corresponding to the plurality of retaining projections 22 and are configured to enable elastic deformation of the cylindrical portion 21 in the radial direction. The plurality of partition ribs 24 are configured to connect the inner peripheral surface of the roller portion 20 and the outer peripheral surface of the cylindrical portion 21 to restrict elastic deformation of the cylindrical portion 21 in the radial direction.

  That is, as shown in FIGS. 2 to 5, the plurality of partition ribs 24 are provided at three positions at an angular interval of 120 degrees, respectively, at approximately the middle between the plurality of retaining projections 22. . Further, at each intermediate portion in the radial direction of the plurality of partition ribs 24, a deformation restricting portion 24a that restricts the elastic deformation of the partition rib 24 is provided. The deformation restricting portion 24 a is formed in a substantially cylindrical shape, and the outer diameter thereof is formed larger than the thickness of the partition rib 24.

  Thereby, as shown in FIGS. 2 to 5, in the cylindrical portion 21, the plurality of retaining projections 22 are provided corresponding to the respective intermediate portions of the plurality of hollowed portions 23, so that the plurality of hollowed portions 23 are obtained. The portion corresponding to is elastically deformed in the radial direction. Further, the cylindrical portion 21 is configured such that elastic deformation of the cylindrical portion 21 in the radial direction is restricted by providing the plurality of partition ribs 24 between the plurality of retaining projections 22. It is done.

  Further, as shown in FIG. 4B and FIG. 5B, both ends of the cylindrical portion 21 in the axial direction are provided so as to project in the axial direction more than the both ends of the roller portion 20 in the axial direction. . For this reason, when the roller body 17 abuts on the lower surface of the case guide rail 13 of the case body 3 and rotates rotationally, only the end face of the cylindrical portion 21 contacts the side surface 3 d of the case body 3. It is configured to reduce area to minimize frictional resistance.

  On the other hand, as shown in FIGS. 2 to 4 and 6, the screw member 18 includes a head 25 and a screw portion 26, which are integrally formed of a metal such as stainless steel. The head portion 25 is rotatably inserted into the cylindrical portion 21 of the roller main body 17 and has an outer diameter equal to or slightly smaller than the inner diameter of the cylindrical portion 21 and of the screw portion 26. It is formed larger than the outer diameter.

  As shown in FIGS. 2 to 4 and FIG. 6, the head 25 is formed such that its axial length is the same as the axial length of the cylindrical portion 21. In this case, the screw portion 26 is provided coaxially with the head 25 at one end (left end in FIG. 6B) of the head 25 and the axial length is the length of the head 25 in the axial direction. It is almost the same as or longer than that.

  Further, as shown in FIGS. 2 to 4, when the head 25 is inserted into the cylindrical portion 21, a plurality of withdrawals provided on the inner peripheral surface of the cylindrical portion 21 is provided on the outer peripheral surface of the head 25. An engagement groove portion 27 is provided annularly, with which the locking projection 22 rotatably engages. That is, the engagement groove portion 27 is a semicircular arc-shaped annular groove, and the head portion 25 is formed into a cylindrical portion 21 by sliding along the engagement groove portion 27 in a state in which the plurality of retaining projections 22 are engaged. It is configured to rotate relatively within.

  Further, as shown in FIG. 4B, when the plurality of retaining projections 22 engage with the engagement groove portion 27, the head portion 25 has an outer end face 25a on the opposite side to the screw portion 26 in the head portion 25. Is disposed in the cylindrical portion 21 without protruding from the inside of the cylindrical portion 21 to the outside, and the inner end face 25b on the screw portion 26 side is configured to be protruded from the inside of the cylindrical portion 21 to the outside. In this case, as shown in FIGS. 4 (c) and 5 (c), the inner end face 25b of the head 25 is provided with a non-slip portion 28 in which a large number of uneven portions are radially formed.

  Further, as shown in FIGS. 2 to 4 and 6, an inclined surface 29 is provided on the outer peripheral edge of the outer end face 25 a of the head 25. The inclined surface 29 facilitates insertion of the head 25 into the cylindrical portion 21, and when the outer peripheral portion of the outer end face 25 a of the head 25 abuts against the plurality of retaining projections 22 in the cylindrical portion 21, It is for making it easy to get over a plurality of retaining projections 22.

  That is, as shown in FIG. 4B, the length of the head 25 from the outer end face to the engagement groove 27 is formed short by the inclined surface 29 of the head 25. For this reason, the head 25 is configured to quickly and smoothly get over when the outer peripheral surface of the inclined surface 29 gets over the plurality of retaining projections 22.

  Thereby, as shown in FIGS. 2 to 4, the screw member 18 is inserted into the cylindrical portion 21 from the end of the cylindrical portion 21 whose inclined surface 29 side of the head portion 25 is located on the side wall 20 a side of the roller portion 20. The outer peripheral portion of the inclined surface 29 of the inserted head 25 rides over the plurality of retaining projections 22 in the cylindrical portion 21, and the plurality of retaining projections 22 engage with the engagement groove 27 of the head 25. Is configured as.

  That is, as shown in FIGS. 2 to 4, when the outer peripheral portion of the inclined surface 29 of the head 25 passes over the plurality of retaining projections 22 in the cylindrical portion 21, the screw member 18 inclines the head 25. The cylindrical portion 21 is elastically deformed by the surface 29 so as to smoothly spread in the radial direction, and the plurality of retaining projections 22 are engaged with the engagement groove portion 27 of the head 25 so that the roller body 17 can rotate. It is configured to be attached and integrated with the roller body 17.

  Therefore, as shown in FIG. 1, in the drawing roller 16, the screw portion 26 of the screw member 18 is inserted into the mounting hole 8 a of the roller mounting portion 8 provided at the rear end of the drawing portion 5 and tightened by the nut 30. It is comprised so that it may be attached to the roller attaching part 8 of the drawer part 5 by being carried out. In this case, when the screw portion 26 of the screw member 18 is inserted into the mounting hole 8 a of the roller mounting portion 8 of the pull-out portion 5 and tightened by the nut 30, the drawer roller 16 slips on the inner end face 25 b of the head 25. The stop portion 28 is configured to be pressed against the roller attachment portion 8 of the lead-out portion 5.

  As a result, as shown in FIGS. 1 to 4, in the drawing roller 16, the non-slip portion 28 of the head 25 is pressed against the roller mounting portion 8 of the drawing portion 5, whereby the screw member 18 is attached to the roller mounting portion 8. It is fixed without rotating with respect to it, and in this state, the roller body 17 is configured to rotate around the head 25 of the screw member 18.

  In this case, as shown in FIGS. 1 to 4, when the non-slip portion 28 of the head 25 is pressed against the roller attachment portion 8 of the lead-out portion 5, the inner end surface 25 b of the head 25 is By protruding from the inside of the cylindrical portion 21, the end face of the cylindrical portion 21 is arranged without being in contact with the roller mounting portion 8.

  Further, as shown in FIGS. 1 to 4, when the non-slip portion 28 of the head 25 is pressed against the roller attachment portion 8 of the lead-out portion 5, the outer end surface 25 a of the head 25 The cylindrical portion 21 is configured to be disposed in the cylindrical portion 21 without protruding from the inside to the outside. The housing roller 14 preferably has the same structure as the drawing roller 16, but may have a different structure, for example, a high strength structure.

Next, the operation of such a drawer device 1 will be described.
First, when the drawing roller 16 is attached to the drawing portion 5, the roller main body 17 and the screw member 18 are integrated in advance. At this time, the inclined surface 29 side of the head 25 of the screw member 18 is inserted into the cylindrical portion 21 from the end side of the cylindrical portion 21 located on the side wall 20 a side of the roller portion 20. At this time, the head 25 is smoothly inserted into the cylindrical portion 21 by the inclined surface 29 of the head 25.

  Then, the outer peripheral surface of the inclined surface 29 of the inserted head 25 is pressed against the plurality of retaining projections 22 provided on the inner peripheral surface of the cylindrical portion 21 to get over. At this time, since the plurality of retaining projections 22 are respectively provided corresponding to the plurality of cut-out portions 23 provided by the plurality of partition ribs 24 between the roller portion 20 and the cylindrical portion 21, The cylindrical portion 21 is elastically deformed so as to be smoothly spread in the radial direction by the inclined surface 29.

  That is, when the outer peripheral surface of the inclined surface 29 of the head 25 is pressed against the plurality of retaining projections 22 in the cylindrical portion 21, the cylinder of the portion corresponding to the hollow portion 23 by the outer peripheral surface of the inclined surface 29 of the head 25 The portion 21 is elastically deformed so as to be spread in the radial direction. For this reason, the outer peripheral surface of the inclined surface 29 of the head 25 passes over the plurality of retaining projections 22, and the plurality of retaining projections 22 engage with the engagement grooves 27 of the head 25.

  At this time, since the length from the outer end face of the head 25 to the engagement groove 27 is formed short by the inclined surface 29 of the head 25, the outer peripheral surface of the inclined surface 29 of the head 25 is not The protrusions 22 are quickly and smoothly passed over. Further, at this time, since the elastic deformation of the cylindrical portion 21 in the radial direction is restricted by the plurality of partition ribs 24, the engagement strength of the plurality of retaining projections 22 with the engagement groove 27 of the head 25 is secured. Ru. Thus, the screw member 18 is rotatably attached to the roller body 17 and integrated with the roller body 17.

  In this state, the plurality of retaining projections 22 are provided on the same circumference on the inner circumferential surface of the cylindrical portion 21, and the engagement groove 27 of the head 25 is provided annularly on the outer circumferential surface of the head 25. As a result, the plurality of retaining projections 22 engaged with the engagement grooves 27 of the head 25 can be moved in the rotational direction along the engagement grooves 27 of the head 25. Further, in this state, the outer end surface 25a on the inclined surface 29 side of the head 25 is disposed in the cylindrical portion 21 without protruding from the inside of the cylindrical portion 21 to the outside, and the inner end surface 25b on the screw portion 26 side is the cylindrical portion 21. It is arranged to protrude from the inside to the outside.

  Then, when the draw-out roller 16 in which the roller body 17 and the screw member 18 are integrated is attached to the draw-out portion 5, the roller attachment portion provided with the screw portion 26 of the screw member 18 at the rear end of the draw-out portion 5 It is inserted into the mounting hole 8 a of 8 and tightened by the nut 30. Thus, the drawing roller 16 is attached to the roller attachment portion 8 of the drawing portion 5.

  At this time, the non-slip portion 28 provided on the inner end surface 25 b of the head portion 25 of the screw member 18 is pressed against the roller mounting portion 8 of the drawing portion 5. For this reason, the drawing roller 16 is fixed without the screw member 18 rotating with respect to the roller mounting portion 8. Further, at this time, the inner end face 25b of the head 25 of the screw member 18 protrudes from the inside of the cylindrical portion 21 so that the axial end face of the cylindrical portion 21 protrudes more than the axial end of the roller portion 20. It arrange | positions without contacting the roller attaching part 8. FIG.

  When the draw-out roller 16 is attached to the roller attachment portion 8 of the draw-out portion 5 as described above, the roller main body 17 smoothly rotates about the head 25 of the screw member 18. Similarly, the housing roller 14 is attached to the front side of the inner surface of each side surface 3 d of the case main body 3 of the housing 2. In this case, the lead-out guide rails 15 are integrally formed on the left and right outer surfaces of the lead-out portion 5 in advance. Further, the casing guide rails 13 are integrally formed on the inner surfaces of the side portions 3 d on the left and right sides of the case main body 3 of the casing 2.

  When the lead-out portion 5 is inserted into the housing 2, the roller attachment portion 8 provided at the rear end of the lead-out portion 5 is inserted into the case main body 3 from the opening 3 e of the front frame portion 3 b of the case main body 3. Insert into At this time, the draw-out guide rail 15 of the draw-out portion 5 is disposed on the case roller 14 attached to the side surface portion 3 d of the case main body 3, and the roller of the draw-out roller 16 attached to the roller attachment portion 8 of the draw-out portion 5 The main body 17 is disposed in contact with the lower surface of the case guide rail 13 of the case main body 3.

  In this state, when the drawer portion 5 is pushed into the housing 2, the drawer portion 5 is accommodated in the housing 2. At this time, the drawer guide rail 15 of the drawer portion 5 moves on the casing roller 14 attached to the side surface portion 3 d of the case main body 3, and the roller of the drawer roller 16 attached to the roller attachment portion 8 of the drawer portion 5. The main body 17 contacts the lower surface of the case guide rail 13 of the case main body 3 and moves while rotating. For this reason, the drawer part 5 moves smoothly and is accommodated in the housing 2.

  In this case, the inner end surface 25b of the head 25 of the screw member 18 is the cylindrical portion 21 when the roller body 17 of the drawing-out roller 16 abuts on the lower surface of the case guide rail 13 of the case body 3 and moves while rotating. By projecting from the inside and arranging the end face in the axial direction of the cylindrical portion 21 without contacting the roller mounting portion 8, the roller main body 17 rotates smoothly around the head 25 of the screw member 18.

  At this time, since the outer end face 25a of the head 25 is disposed in the cylindrical portion 21 without projecting outside from the inside of the cylindrical portion 21, the outer end face 25a of the head 25 is the side face 3d of the case main body 3 The roller body 17 abuts on the lower surface of the casing guide rail 13 and moves smoothly while rotating. In this case, since the end in the axial direction of the cylindrical portion 21 protrudes further than the end in the axial direction of the roller portion 20, even if the roller main body 17 contacts the side surface 3d of the case main body 3, the contact area It can be made smaller to minimize frictional resistance.

  As described above, according to the drawing-out roller 16 of the drawer device 1, the roller body 17 on which the elastic cylindrical portion 21 having the retaining projection 22 provided on the inner surface is concentrically provided, and the cylindrical portion 21 are rotatable. The screw member 18 is provided with the engagement groove 27 on the outer peripheral surface of the head 25 to be inserted into which the retaining projection 22 engages rotatably and movably, so that high dimensional accuracy is not required. The roller main body 17 and the screw member 18 can be integrated, and the cost can be reduced.

  Further, according to the drawing-out roller 16 of the drawer device 1, the roller body 17 is provided concentrically with the elastic cylindrical portion 21 having the retaining projection 22 provided on the inner surface, and the inner end face 25 b of the head 25. And the screw member 18 is provided on the outer peripheral surface of the head 25 when the head 25 is rotatably inserted into the cylindrical portion 21. By the rotational movement of the retaining projection 22 engaged with the engaging groove portion 27, high dimensional accuracy is not required, and integration of the roller main body 17 and the screw member 18 can be achieved, resulting in cost reduction. Can be

  That is, in the drawing-out roller 16 of the drawer device 1, the head 25 of the screw member 18 is inserted into the cylindrical portion 21 of the roller main body 17, and the retaining groove 22 in the cylindrical portion 21 is formed in the engaging groove 27 of the head 25. Since the cylindrical portion 21 can be elastically deformed when engaged, it is possible to easily and reliably engage the retaining projection 22 in the cylindrical portion 21 with the engaging groove portion 27 of the head 25. Thus, the roller body 17 and the screw member 18 can be integrated without requiring high dimensional accuracy.

  In this case, in the drawing-out roller 16 of the drawer device 1, the retaining projections 22 are provided in a hemispherical shape at a plurality of locations on the same circumference of the inner surface of the cylindrical portion 21. The retaining projection 22 in the cylindrical portion 21 is engaged with the engaging groove portion 27 of the head 25 by being a semi-circular annular groove which is provided on the outer peripheral surface of the disc and the retaining projection 22 engages rotatably and movably. When engaged, the plurality of retaining projections 22 can be rotationally moved along the engagement groove 27.

  Further, in the drawing-out roller 16 of the drawer device 1, the head 25 of the screw member 18 can be obtained because the plurality of cut-out portions 23 are provided by the plurality of partition ribs 24 between the roller main body 17 and the cylindrical portion 21. When inserting the cylindrical portion 21 of the roller main body 17 and engaging the retaining projection 22 in the cylindrical portion 21 with the engaging groove portion 27 of the head portion 25, the cylindrical portion 21 can be easily made It can be elastically deformed well.

  That is, since the plurality of retaining projections 22 are provided for the plurality of hollow portions 23, the head 25 of the screw member 18 is inserted into the cylindrical portion 21 of the roller main body 17 to When pressing against the locking projection 22 and moving over, the cylindrical portion 21 at the position where the locking projection 22 is positioned can be elastically deformed positively and favorably so as to push and spread in the radial direction.

  In this case, the plurality of partition ribs 24 connect the inner peripheral surface of the roller portion 20 and the outer peripheral surface of the cylindrical portion 21 to restrict elastic deformation of the cylindrical portion 21 in the radial direction, whereby the head of the screw member 18 is formed. The elastic deformation of the cylindrical portion 21 in the radial direction is restricted by the partition rib 24 when the portion 25 gets over the retaining projection 22 in the cylindrical portion 21 and the retaining projection 22 engages with the engagement groove 27. Thus, the engagement strength of the plurality of retaining projections 22 with respect to the engagement groove 27 of the head 25 can be secured, whereby the screw member 18 and the roller main body 17 can be reliably integrated.

  That is, the plurality of partition ribs 24 are provided so as to be located substantially in the middle between the plurality of retaining projections 22 and restrict the deformation of the partition ribs 24 in the respective intermediate portions in the radial direction of the plurality of partition ribs 24. By providing the deformation restricting portion 24a, elastic deformation of the partition rib 24 can be restricted by the deformation restricting portion 24a, and therefore, engagement of the plurality of retaining projections 22 with the engaging groove portion 27 of the head 25 is achieved. The strength can be reliably increased.

  Further, in the drawer roller 16 of the drawer device 1, both end portions in the axial direction of the cylindrical portion 21 project in the axial direction more than both end portions in the axial direction of the roller portion 20. When attached to the roller attachment portion 8 and the drawer portion 5 is slid in the housing 2, the axial end face of the roller portion 20 can be prevented from coming into contact with the inner side surface of the housing 2. Even if the axial end of the contact portion contacts the inner side surface of the housing 2, the contact area can be reduced to reduce the frictional resistance.

  Further, in the drawer roller 16 of the drawer device 1, the head portion 25 of the screw member 18 is disposed by causing the inner end surface 25 b on the screw portion 26 side to protrude from the inside of the cylindrical portion 21 to the outside. The inner end face 25b of the head 25 can be pressed against the roller mounting portion 8 when the roller 26 is mounted on the roller mounting portion 8 of the drawing portion 5, whereby the end of the cylindrical portion 21 contacts the roller mounting portion 8 Since it does not occur, the roller body 17 can be rotated smoothly and favorably about the head 25 of the screw member 18.

  In this case, the non-slip portion 28 is provided on the inner end surface 25 b of the head 25 located on the side of the screw portion 26 of the screw member 18 so that the screw portion 26 is attached to the roller attachment portion 8 of the drawing portion 5. In this case, since the non-slip portion 28 of the head 25 can be pressed against the roller mounting portion 8 to be fixed securely, the pull-out roller 16 can be pulled out from the pull-out portion 5 without using a washer such as a spring washer or a muffle washer. Can be securely and firmly attached to the roller attachment portion 8 of FIG.

  Further, in the draw-out roller 16 of the drawer device 1, the head 25 of the screw 18 does not project the outer end face 25 a on the opposite side of the screw 26 from the inside of the cylinder 21 to the outside. The outer end face 25 a of the head 25 is an inner side surface of the housing 2 when the drawing-out roller 16 is attached to the roller attachment portion 8 of the drawing portion 5 and the drawing portion 5 is slid in the housing 2. The lead-out portion 5 can slide smoothly and favorably in the housing 2.

  Furthermore, in the drawing-out roller 16 of the drawer device 1, the inclined surface 29 is provided on the peripheral edge portion of the outer end face 25 a of the head 25 of the screw member 18. The head 25 can be inserted easily and smoothly into the cylindrical portion 21 by the inclined surface 29 when inserting the cylindrical portion 21, and the head 25 is pressed against the retaining projection 22 in the cylindrical portion 21. The inclined surface 29 allows the retaining projection 22 in the cylindrical portion 21 to be easily and favorably surmounted by the inclined surface 29.

  That is, in the pull-out roller 16 of the drawer device 1, since the inclined surface 29 is provided on the peripheral edge portion of the outer end face 25 a of the head 25 of the screw member 18, from the outer end face of the head 25 to the engagement groove 27 The length can be formed short by the inclined surface 29 of the head 25. Therefore, the outer peripheral surface of the inclined surface 29 of the head 25 can get over the plurality of retaining projections 22 quickly and smoothly.

  In the embodiment described above, a case is described in which both axial end portions of the cylindrical portion 21 of the roller main body 17 project in the axial direction more than both axial end portions of the roller portion 20, but the present invention Not limited to this, both axial end portions of the roller portion 20 of the roller main body 17 may project in the axial direction more than both axial end portions of the cylindrical portion 21. Even with this configuration, even if the axial end face of the roller portion 20 contacts the inner side surface of the housing 2, the contact area can be reduced and the frictional resistance can be reduced.

  In the embodiment described above, the case where the retaining projection 22 is provided on the inner surface of the cylindrical portion 21 of the roller main body 17 and the engagement groove 27 is provided on the outer peripheral surface of the head 25 of the screw member 18 has been described. The invention is not limited to this, and the engaging groove portion 27 may be provided on the inner surface of the cylindrical portion 21 of the roller main body 17 and the retaining projection 22 may be provided on the outer peripheral surface of the head 25 of the screw member 18.

  Furthermore, although the case where it applied to the drawer apparatus 1 of electronic register was described in the embodiment mentioned above, this invention does not necessarily need to be the drawer apparatus 1 of electronic register, for example, the furniture provided with the drawer part 5 etc. Can also be applied.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, The invention described in the claim, and the range of equivalence are included.
The invention described in the claims of the present application is appended below.

(Supplementary note)
The invention according to claim 1 is characterized in that the retaining member is provided on a roller main body provided with an elastic cylindrical portion having a retaining portion on its inner surface, and an outer peripheral surface of a head rotatably inserted in the cylindrical portion. And a screw member provided with an engagement portion engaged rotatably and movably.

  The invention according to claim 2 is a roller main body provided with an elastic cylindrical portion provided with a retaining portion on its inner surface, and a screw member provided with a screw at the same axis at one end of the head. And the screw member is rotatably engaged with the engaging portion provided on the outer peripheral surface of the head when the head is rotatably inserted into the cylindrical portion. It is a roller characterized by doing.

  The invention according to claim 3 is the roller according to claim 1 or 2, wherein the retaining portion is provided to project hemispherically at a plurality of locations on the same circumference on the inner surface of the cylindrical portion The engaging portion is a roller provided on the outer peripheral surface of the head, and the retaining portion is a semi-circular annular groove engaged rotatably and movably.

  The invention according to claim 4 is the roller according to any one of claims 1 to 3, for elastically deforming the cylindrical portion in the radial direction between the roller main body and the cylindrical portion. A plurality of cut-out portions are provided by a plurality of partition ribs.

  In the roller according to a fifth aspect of the present invention, in the roller according to the fourth aspect, the plurality of retaining portions are provided corresponding to the plurality of hollow portions, and the plurality of dividing ribs are the plurality of The roller is provided between the retaining portions and is characterized in that elastic deformation of the cylindrical portion in the radial direction is restricted.

  The invention according to a sixth aspect is the roller according to any one of the first to fifth aspects, wherein one of both axial end portions of the roller body and both axial end portions of the cylindrical portion are The roller is characterized by protruding in the axial direction.

  The invention according to claim 7 is the roller according to any one of claims 2 to 6, wherein the head portion of the screw member has the one end portion provided with the screw portion inside of the cylindrical portion And the other end portion on the opposite side of the screw portion is disposed in the cylindrical portion without protruding to the outside from the inside of the cylindrical portion.

  According to an eighth aspect of the present invention, in the roller according to any one of the first to seventh aspects, a peripheral surface of the other end of the head portion of the screw member is provided with an inclined surface. It is a roller characterized by that.

  The invention according to claim 9 is a drawer apparatus comprising the roller according to any one of claims 1 to 8.

DESCRIPTION OF SYMBOLS 1 drawer device 2 case 3 case main body 4 cover case 5 drawing-out part 8 roller attachment part 12 guide mechanism 13 case guide rail 14 case roller 15 drawing-out guide rail 16 drawing-out roller 17 roller main body 18 screw member 20 roller part 21 cylindrical part Reference Signs List 22 retaining projection 23 hollow portion 24 partition rib 24 a deformation regulating portion 25 head 25 a outer end surface 25 b inner end surface 26 screw portion 27 engagement groove portion 28 non-slip portion 29 inclined surface 30 nut

Claims (9)

A roller body provided with a resilient cylindrical portion having a retaining portion on its inner surface;
A screw member provided with an engagement portion on the outer peripheral surface of a head rotatably inserted into the cylindrical portion so as to rotatably move the retaining portion;
A roller characterized by comprising. A roller body provided with a resilient cylindrical portion having a retaining portion on its inner surface;
A screw member provided with a screw on the same axis at one end of the head;
Equipped with
The screw member is characterized in that when the head is rotatably inserted into the cylindrical portion, the retaining member engages with the engaging portion provided on the outer peripheral surface of the head so as to be rotationally movable. To roller.   The roller according to claim 1 or 2, wherein the retaining portion is provided so as to project hemispherically at a plurality of locations on the same circumference on the inner surface of the cylindrical portion, and the engagement portion is A roller provided with an outer circumferential surface of a head, wherein the retaining portion is a semi-circular annular groove engaged rotatably and movably.   The roller according to any one of claims 1 to 3, wherein, between the roller main body and the cylindrical portion, a plurality of hollowed portions for elastically deforming the cylindrical portion in the radial direction are a plurality of partitions A roller characterized by being provided by a rib.   5. The roller according to claim 4, wherein the plurality of retaining portions are provided corresponding to the plurality of hollow portions, and the plurality of partitioning ribs are positioned between the plurality of retaining portions. A roller, provided to regulate elastic deformation of the cylindrical portion in the radial direction.   The roller according to any one of claims 1 to 5, wherein any one of both end portions in the axial direction of the roller body and both end portions in the axial direction of the cylindrical portion protrude in the axial direction. Features a roller.   The roller according to any one of claims 2 to 6, wherein in the head of the screw member, the one end portion provided with the screw portion protrudes from the inside of the cylindrical portion to the outside, A roller characterized in that the other end on the opposite side is disposed in the cylindrical portion without protruding from the inside to the outside of the cylindrical portion.   The roller according to any one of claims 1 to 7, wherein a peripheral surface of the other end of the head portion of the screw member is provided with an inclined surface. A drawer apparatus comprising the roller according to any one of claims 1 to 8.

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